ES2906759T3 - Three-dimensional knitted shoe blank and manufacturing method thereof using a double bed flat knitting machine - Google Patents

Abstract

A method for knitting a three-dimensional blank (100, 200, 200', 200") using a double-bed flat knitting machine, comprising: providing at least a first yarn (10) on a front needle bed and a rear needle bed of the double-bed flat knitting machine by double needle-skip knitting and providing at least a second yarn (20) on the rear needle bed to together form an assembly line (101, 201); knitting the first yarn (10) on the front needle bed and the rear needle bed, continuing from the assembly line (101, 201) by loop transfer and double needle-skip knitting to form an upper (112, 212); knitting the second yarn on the rear needle bed continuing from the assembly line (101, 201) by single needle-skip knitting to form a front sole portion (122, 222), wherein the upper part (112, 212) and the front sole part (122, 222) are knitted alternately, and the front sole part (122, 222) is connected to the upper part (112, 212) to form a pocket structure; knitting continuing from the front sole part (122, 222) on the front needle bed and the rear needle bed to form a back part (130), wherein, in forming the back part (130), a plurality of sharp stitches are kept on the front needle bed on two sides of a rear end of the back part (130); and knitting continuing from the center of the rear end of the rear part (130) on the front needle bed and the rear needle bed by double knitting to form a heel part (140) with a predetermined number of stitches, wherein, when the knitting of the heel part (140) reaches the predetermined number of stitches on two opposite sides of the heel part (140), the rear needle bed is moved transversely to sequentially and respectively knit the sharp stitches kept in the front needle bed on the two sides of the rear end of the rear part (130) together with the two opposite sides of the heel part (140), whereby the heel part (140) and the rear part (130) are combined to form a 3D rear shoe part (100a) with two joining lines (104a, 104b) formed between the heel part (140) and the rear part (130) on the two opposite sides of the heel part (140). heel part (140), respectively, and the 3D blank shoe piece (100, 200, 200', 200") is formed as an integral knitted fabric without any stitched part between the upper part (112, 212), the front sole part (122, 222), the rear part (130) and the heel part (140).

Description

DESCRIPTION

Three-dimensional knit shoe blank and manufacturing method thereof using a double-bed flat knitting machine

field of invention

The present invention generally relates to a three-dimensional (3D) shoe blank and a method of manufacturing the same. Specifically, the present invention relates to a 3D integral knit shoe blank made by a double bed flat knitting machine and a manufacturing method thereof.

Background

In the conventional shoe manufacturing process, a shoe is made by connecting multiple shoe pieces. Consequently, the materials and processes for making the shoes become very complicated. In recent years, due to better permeability and comfort, fewer consumables required, and lower cost in the manufacturing process compared with conventional shoes, knitted shoes have developed rapidly and gradually occupied a place in the market.

Knitted shoes are generally made by knitting yarns into a shoe blank using the knitting machine, and then bonding the shoe blank to the sole of the shoe. In this case, the shapes of the shoe blanks formed by knitting vary with various types of knitting machines and knitting methods. Limited by the number of needle beds and current knitting methods, two-needle bed flat knitting machines commonly used in the industry generally knit and form a two-dimensional shoe blank in a sheet-like fabric shape. first, the two-dimensional shoe blanks then being further processed through sewing techniques to build a three-dimensional shape. However, due to the delicate and tedious sewing work required, it is difficult to improve the production efficiency of knitted shoes. Furthermore, two-dimensional shoe blanks typically only contain the part that covers the dorsal part of the foot, resulting in a lack of adequate protection for the plantar part, and such a two-dimensional shoe blank without the plantar part makes its conjugation and sewing with the shoe sole much more difficult.

EP 2875745A1 proves a shoe upper part (1) with a heel cover part (2) and a body part (3) integrally formed without seams by a knitting pattern, wherein one end in the width direction knitting area of the heel cover part (2) and an end in the column direction of the body part (3) are connected at the edge positions (L2, L3) on a side surface of the upper part of shoe (1) from the edges (L1 to L3) to become the boundary lines of the heel cover part (2) and the body part (3). EP 2805638A1 provides a shoe 1 including a base knitted fabric portion 2 having a mixed section 20 knitted seamlessly with a flat knitting machine. US 2008/110049A1 provides an article of footwear including an upper with a knitted element formed through a flat knitting process. A knitted element for footwear includes a foot-receiving portion and one or more straps unitarily formed with the foot-receiving portion. The foot receiving portion defines a foot receiving void, and the one or more straps extend outwardly from the sides of the foot receiving portion.

Summary of the invention

In view of the prior art, an object of the invention is to provide a 3D shoe blank manufactured using a double-bed flat knitting machine, wherein the 3D shoe blank is an integral knitted fabric without any part sewn, so the sewing work can be eliminated to greatly improve production efficiency.

Another object of the invention is to provide a 3D shoe blank, the upper part of which has improved structural strength by double knitting to meet the needs of users.

In accordance with the invention, a 3D shoe blank made using a double-bed flat knitting machine includes an upper, a front sole portion, a back portion, and a heel portion. The upper part has two technical surfaces knitted from at least one first yarn by double jump-needle knitting. The front sole part is connected to the upper part by a mounting line and two connecting lines, whereby the front sole part and the upper part are connected to form a pocket structure, wherein a part of the upper part of the foresole corresponding to the upper part is knitted from at least one second yarn by simple jump-needle knitting. The back part is connected to the front sole part. The heel portion extends from a central rear end of the rear portion. Two opposite sides of the heel part are respectively connected to a rear left end and a rear right end of the rear part, whereby the heel part and the rear part are combined to form a 3D rear shoe part, and are form two joining lines between the heel part and the rear part on the two opposite sides of the heel part. heel, respectively.

In one embodiment, the two connection lines connect to two ends of the assembly line and extend outwardly and obliquely to an outer side of the 3D shoe blank.

In one embodiment, the upper substantially matches the forefoot portion in shape and size.

In one embodiment, the 3D shoe blank further includes a first upper extension portion and a second upper extension portion connected to two sides of a rear end of the upper, respectively. The 3D shoe blank further includes a front sole extension portion connected between the front sole portion and the rear sole portion. The forefoot extension portion partially corresponds to the first upper extension portion and the second upper extension portion.

In one embodiment, the forefoot extension portion includes covered portions masked by the first upper extension portion and the second upper extension portion and an exposed exposed portion between the first upper extension portion and the second upper extension portion. The covered parts are knitted from the second yarn by single jump-needle knitting and the uncovered part is knitted from the second yarn by single knitting.

In one embodiment, the 3D shoe blank further includes an extension strap partially connected to the heel portion and extending outwardly toward two opposite sides of the heel portion.

In one embodiment, the 3D shoe blank further includes an extension portion connected between the heel portion and the extension strap, whereby the extension strap is partially connected to the heel portion via the heel portion. extension.

The invention also provides a method of knitting a three-dimensional (3D) shoe blank using a double bed flat knitting machine. The method includes providing at least a first yarn in a front needle bed and a rear needle bed of the double bed flat knitting machine by double needle jump knitting and providing at least a second yarn in the rear needle bed to form an assembly line together; knitting the first yarn on the front needle bed and the rear needle bed continuing from the assembly line by loop transfer and double jump-needle knitting to form an upper part; knitting the second yarn on the rear needle bed continuing from the assembling line by single jump-needle knitting to form a front sole part, wherein the upper part and the front sole part are alternately knitted, and the Forefoot portion connects to upper to form pocket structure; knitting continuing from the front sole part on the front needle bed and the rear needle bed to form a rear part, wherein, in forming the rear part, a plurality of live stitches are kept on the front needle bed in two sides of a rear end of the back; and knitting continuing from the center of the rear end of the rear part on the front needle bed and the rear needle bed by double knitting to form a heel part with a predetermined number of stitches, wherein, when knitting the part of heel reaches the predetermined number of stitches on two opposite sides of the heel part, the rear needle bed moves transversely to knit sequentially and respectively the live stitches held in the front needle bed on the two sides of the rear end of the back part together with the two opposite sides of the heel part, whereby the heel part and the back part are combined to form a 3D back shoe part with two seam lines formed between the heel part and the back part on the two opposite sides of the heel portion, respectively. The 3D shoe blank is formed as an integral knit fabric without any sewn parts between the upper part, the front sole part, the back part and the heel part.

In one embodiment, the method further includes: knitting continuing from one side of a trailing end of the upper by loop transfer and double jump-needle knitting to form a first upper extension portion; knitting a third yarn continuing from the other side of the trailing end of the top by loop transfer and double jump-needle knitting to form a second top extension part, wherein the first top extension part and the second top extension part upper part are separate and substantially symmetrical, whereby the first upper extension part, the second upper extension part and the upper part are combined to form an upper assembly; and knitting the second yarn on the rear needle bed to form a front sole extension part between the front sole part and the back part, wherein a part of the front sole extension part corresponding to the first extension part upper and the second upper extension part is knitted by simple jump-needle knitting, and another part of the forefoot extension part not corresponding to the first upper extension part and the second upper extension part is knitted by simple knitting ; the forefoot sole portion and forefoot extension portion are combined to form a forefoot sole assembly.

In one embodiment, the back is knitted from the second yarn or another yarn, or the back is knitted from the second yarn together with another yarn.

In one embodiment, the heel portion is knitted from the second yarn or another yarn, or the heel portion is knitted from the second yarn together with another yarn.

In one embodiment, the heel portion is knitted from the second yarn or another yarn, or the heel portion is knitted from the second yarn together with another yarn.

In one embodiment, the method further includes: after forming the 3D rear shoe part, double knitting the front needle bed and the rear needle bed to form an extension strap, wherein the extension strap is partially connects to the heel portion and extends outward toward the two opposite sides of the heel portion.

In one embodiment, the method further includes: double knitting from the heel portion on the front needle bed and the rear needle bed to form an extension portion connected between the heel portion and the extension strap, for whereby the extension strap is partially connected to the heel part by means of the extension part.

Compared with the prior art, the 3D shoe blank of the invention is an integral knitted fabric without any sewn parts made by a double-bed flat knitting machine, thus sewing work can be omitted to simplify the process. fabrication process. The 3D shoe blank of the invention has an improved strength upper that is manufactured by double knitting and is beneficial in maintaining the shape of the shoe body and meeting the needs of the wearer. The method of the invention uses an innovative knitting design to form an integral knit fabric simply by using a double-bed flat knitting machine without upgrading the knitting machine, whereby the equipment cost can be effectively reduced and the cost of the equipment can be improved. production efficiency.

Brief description of the drawings

Figure 1 is a schematic plan view of a first embodiment of the three-dimensional (3D) shoe blank.

Figure 2 is a schematic plan view of an upper part of the 3D shoe blank of Figure 1.

Figure 3 is a schematic plan view of a foresole portion of the 3D shoe blank of Figure 1.

Fig. 4 is a schematic plan view of a back and a heel portion of the 3D shoe blank of Fig. 1.

Figure 5 is a 3D schematic view of the first embodiment of the 3D shoe blank.

Figure 6 is a 3D schematic view of a shoe body after the 3D shoe blank of Figure 5 is molded.

Figure 7 is a schematic plan view of a second embodiment of the 3D shoe blank. Figure 8 is a schematic plan view of an upper part of the 3D shoe blank of Figure 7.

Figure 9 is a schematic plan view of a foresole portion of the 3D shoe blank of Figure 7.

Fig. 10 is a schematic plan view of a back and a heel portion of the 3D shoe blank of Fig. 7.

Figure 11 is a 3D schematic view of the second embodiment of the 3D shoe blank. Fig. 12 is a schematic cross-sectional view of the 3D shoe blank of Fig. 11. Fig. 13 is a 3D schematic view of a shoe body after molding the 3D shoe blank of Fig. eleven.

Fig. 14 is a schematic knitting diagram of the upper part and the foresole part of the 3D shoe blank according to an embodiment of the present invention.

Fig. 15 is a schematic knitting diagram of the upper extension parts and the lower extension part. of the foresole of the 3D shoe blank according to another embodiment of the present invention.

Fig. 16 is a schematic knitting diagram of the back and heel portion of the 3D shoe blank according to an embodiment of the present invention.

Figure 17 is a schematic plan view of a third embodiment of the 3D shoe blank.

Fig. 18 is a 3D schematic view of the third embodiment of the 3D shoe blank.

Fig. 19 is a 3D schematic view of a shoe body after molding the 3D shoe blank of Fig. 18.

Figure 20 is a schematic plan view of a fourth embodiment of the 3D shoe blank.

Fig. 21 is a 3D schematic view of the fourth embodiment of the 3D shoe blank.

Fig. 22 is a 3D schematic view of a shoe body after molding the 3D shoe blank of Fig. 21.

Detailed description of the present invention

For a complete understanding of the invention, the details of the steps and structures of the invention will be described. In order not to place undue limitations on the invention, neither the manufacturing processes nor the specific steps of the knitting technique that are well known in the art will be described.

A three-dimensional (3D) shoe blank of the invention is an integral knit fabric without any sewn portions and manufactured using a double bed flat knitting machine. For example, the 3D shoe blank can be knitted using a double bed flat knitting machine with moving cams, which can change the direction of movement and drive the actions of the needles. As shown in Figures 1 through 5, in a first embodiment, the 3D shoe blank 100 includes an upper 112, a foresole portion 122, a rear portion 130, and a heel portion 140. upper 112 has two technical surfaces knitted from at least one yarn (such as the first yarn 10 shown in Figure 14) by double jump-needle knitting. That is, the outer surface of the upper 112 facing outward and the inner surface of the upper 112 facing the forefoot portion 122 are both technical surfaces. Furthermore, at least one yarn indicated herein is preferably formed by twisting and combining multiple yarns with different characteristics (such as materials, types, shapes, colors, etc.), but not limited thereto.

The fore sole part 122 is connected to the upper part 112 by a mounting line 101 and two connecting lines 102, 103, whereby the fore sole part 122 and the upper part 112 are connected to form a pocket structure. . The portion of the forefoot portion 122 corresponding to the upper portion 112 is knitted from at least one yarn (such as the second yarn 20 shown in FIG. 14) by simple jump-needle knitting. For example, the forefoot portion 122 is preferably knitted by simple jump-needle knitting from at least one yarn that is different from, but not limited to, the yarn used for the upper 112. In this embodiment, the forefoot portion 122 corresponds substantially completely to the upper 112, whereby the entire forefoot portion 122 is knitted by single jump-needle knitting. Stated another way, upper 112 substantially matches forefoot portion 122 in shape and size. Upper 112 and forefoot portion 122 completely overlap each other and connect to form a pocket-like structure. The fore sole part 122 and the upper part 112 are connected at the outer perimeters, whereby the mounting line 101 is located at the front end of the fore sole part 122 and the upper part 112, and the connecting lines 102 and 103 are located, respectively, on two opposite sides of the forefoot portion 122 and the upper 112 with respect to the mounting line 101. Specifically, the front ends of the forefoot sole portion 122 and the upper 112 are connected by the mounting line 101, while the two connecting lines 102 and 103 are connected to two ends of the mounting line 101 and extend out and obliquely to an outer side of the rear part 130. For example, connecting line 102 connects to the left end of mounting line 101 and extends back to connect the left side edge of the upper part 112 and the left side edge of the front sole part to 122. Connecting line 103 connects to the right end of mounting line 101 and extends rearward to connect the right side edge of the upper 112 and the right side edge of the forefoot portion 122. As such , the upper 112 and the forefoot portion 122 are connected to form the pocket structure.

Back 130 is connected to forefoot portion 122. In one embodiment, back 130 is preferably knitted from at least one yarn by double knitting. In one embodiment, the back 130 may be knitted from previously used yarns (such as yarns 10, 20) or another yarn that is additionally introduced. In another embodiment, the back 130 may be knitted from previously used yarns (such as yarns 10, 20) together with another yarn. For example, the back 130 may be knitted by continuing to use the upper 112 yarn, the forefoot 122 yarn, the upper 112 yarns, and the upper 112 yarn. foresole portion 122, or another yarn. Alternatively, the back 130 may be knitted using another yarn in conjunction with the upper 112 yarn, the fore sole 122 yarn, or the upper 112 and fore sole 122 yarns.

The heel portion 140 extends from a central rear end of the rear portion 130. Two opposite sides of the heel portion 140 connect respectively to a left rear end and a right rear end of the rear portion 130, whereby the The heel part 140 and the back part 130 are combined to form a 3D back shoe part 100a, and two joint lines 104a and 104b are formed between the heel part 140 and the back part 130 on the two opposite sides of the shoe part. of heel 140, respectively. In one embodiment, heel portion 140 is knitted, preferably continuing the use of yarn from back portion 130 by double knitting.

As shown in Fig. 6, after knitting of the 3D shoe blank 100 is finished, without any sewing work, the 3D shoe blank 100 can be used on the last and molded to form a shoe body. 1. For example, when the 3D shoe blank 100 is knitted, a thermoplastic yarn may be knitted simultaneously. When the 3D shoe blank 100 is processed to form the shoe body 1, since the thermoplastic yarn is heat-curable, by thermal molding, the thermoplastic yarn can be melted to be evenly distributed on the shoe body 1, and then harden to support the shape of the shoe body 1. The thermoplastic yarn material may be any suitable thermosetting material including, but not limited to, nylon, polyester, acrylic, etc. It is noted that the shoe body 1 can be formed by other methods, not limited to the use of thermoplastic yarn during the knitting process.

After the 3D shoe blank 100 is molded into the shoe body 1, the upper part 112 and the front sole part 122 can cover from the dorsal part to the forefoot plantar part, while the rear shoe part 3D 100a made up of the rear part 130 and the heel part 140 covers the lateral part, the posterior plantar part and the heel of the foot. Specifically, the rear edge of the upper 112 and the upper edge of the 3D rear shoe part 100a (i.e., the outer edges of the rear part 130 and the heel part 140) together define a shoe opening of the shoe body. shoe 1 to allow the foot to enter the inner space enclosed by the shoe body 1. Connecting lines 102 and 103 on two opposite sides of the foresole part 122 and the upper part 112, respectively, start from two ends assembly line 101 and gradually extend outward and obliquely toward the 3D rear shoe part 100a until reaching the shoe opening 1a, whereby the front sole part 122 preferably covers from the front plantar part towards two opposite front sides. For example, upper 112 may cover the dorsal surface of the forefoot, and forefoot portion 122 covers the forefoot and extends upward to cover the forefoot. On the other hand, a part of the back part 130 covers the plantar back part while another part of the back part 130 extends upward to cover the back side parts and extends back to cover the heel with the heel part 140 Therefore, the shoe body 1 formed from the 3D shoe blank 100 of the invention can substantially cover the dorsal part, the plantar part, the lateral sides and the heel of the foot.

In the first embodiment, although the 3D shoe blank 100 is illustrated with an upper portion 112 and a foresole portion 122 substantially completely overlapping, it is not limited thereto. In other embodiments, by changing the upper design, the 3D shoe blank can have a different outward appearance. As shown in Figures 7 through 12, in a second embodiment, a shoe blank 200 includes an upper portion 212, a foresole portion 222, a rear portion 130, and a heel portion 140, and further includes a heel portion. first upper extension portion 214a, a second upper extension portion 214b, and a forefoot extension portion 224. Similarly, upper 212 has two technical surfaces knitted from at least one yarn (such as the first yarn 10) by double knitting with jump needles. The fore sole part 222 is connected to the upper part 212 by a mounting line 201 and two connection lines 202, 203, whereby the fore sole part 222 and the upper part 212 are connected to form a pocket structure. . The portion of the forefoot portion 222 corresponding to the upper portion 212 is knitted from at least one yarn (such as the second yarn 20) by simple jump-needle knitting. The first upper extension part 214a and the second upper extension part 214b are connected to two sides of a rear end of the upper part 212, respectively. Forefoot extension portion 224 connects between forefoot sole portion 222 and rear sole portion 130 and partially corresponds to first upper extension portion 214a and second upper extension portion 214b. The heel portion 140 extends from a central rear end of the rear portion 130. The two opposite sides of the heel portion 140 connect respectively to a left rear end and a right rear end of the rear portion 130, whereby the heel portion 140 and the rear portion 130 are combined to form a 3D rear shoe portion 100a, and two seam lines 104a and 104b are formed between the heel portion 140 and the rear portion 130 on the two opposite sides of the shoe. heel portion 140, respectively. In this embodiment, details of the upper 212, the forefoot portion 222, the rear portion 130, and the heel portion 140 may be referred to in the related descriptions of the embodiment of Fig. 1 and will not be elaborated upon. Hereinafter, the details of the first upper extension part 214a, the second upper extension part 214b and the forefoot extension 224 are illustrated.

Specifically, the first upper extension part 214a and the second upper extension part 214b are separated and connected to two sides of the rear end of the upper part 212 (such as the left rear end and the right rear end), whereby the first upper extension part 214a, the second upper extension part 214b and the upper 212 are combined to form an upper assembly 210. In one embodiment, one of the upper extension portions 214a and 214b is knitted, preferably continuing the knitting of the yarn of the upper portion 212, and the other of the upper extension portions 214a and 214b is knitted using another yarn (such as the third yarn 30 in Fig. 15), but not limited to this. In another embodiment, the upper extension portions 214a and 214b may be knitted using other yarns of the same attribute or quantity. On the other hand, the upper extension portions 214a and 214b are preferably symmetrical in shape (ie, the outer aspects thereof are substantially visually symmetrical), but not limited thereto.

The forefoot sole extension portion 224 connects to the trailing end of the forefoot sole portion 222, whereby the forefoot sole portion 222 and forefoot sole extension portion 224 are combined to form a forefoot sole assembly 220. Forefoot extension portion 224 partially corresponds to first upper extension portion 214a and second upper extension portion 214b. For example, forefoot extension portion 224 includes covered portions 224a and 224b and exposed portion 224c. Cover portions 224a and 224b are masked by first upper extension portion 214a and second upper extension portion 214b, respectively. Bare portion 224c is exposed between first upper extension portion 214a and second upper extension portion 214b. That is, preferably, the covered portions 224a and 224b match the upper extension portions 224a and 224b in shape and size, respectively, while the exposed portion 224c is located between the covered portions 224a and 224b and is not masked by the upper assembly. 210. The forefoot portion 222 is knitted, preferably by single jump-needle knitting from at least one yarn that is different from the yarn used for the upper 212. The covered portions 224a, 224b of the extension portion The foresole portion 224 are preferably knitted continuing from the foresole portion yarn 222 (such as the second yarn 20) by simple jump-needle knitting. The exposed portion 224c of the forefoot extension portion 224 is preferably knitted continuing from the forefoot portion yarn 222 (such as the second yarn 20) by single knitting. When forefoot portion 222 is connected to upper 212, upper 212 and foresole portion 222 substantially completely overlap each other, whereby upper extension portions 214a and 214b substantially completely overlap to the covered portions 224a and 224b of the forefoot extension portion 224, respectively, while the uncovered portion 224c of the forefoot extension portion 224 is exposed by the non-overlapping upper 212 and upper extension portions 214a. and 214b.

The front end of the upper part 212 and the front end of the front sole part 222 are connected by the mounting line 201, while the two connecting lines 202 and 203 are connected to two ends of the mounting line 201 and extend outwardly and obliquely to an outer side of the back 130. For example, connecting line 202 connects to the left end of mounting line 201 and extends back to connect the left side edge of the top 212 and the left side edge of the forefoot portion 222, and further to connect the left side edge of the first upper extension portion 214a and the left side edge of the cover portion 214a. The connecting line 203 connects to the right end of the mounting line 201 and extends rearward to connect the right side edge of the upper 212 and the right side edge of the forefoot portion 222, and further to connect the right side edge of the second upper extension part 214b and the right side edge of the cover part 214b. As such, the upper assembly 210 and the forefoot assembly 220 connect at the outer perimeters to form the pocket structure.

It is noted that the thickness of the 3D shoe blank 200 in Figure 12 is exaggerated for better understanding. In practical applications, the thickness of the 3D shoe blank 200 varies with the choice of yarns, knitting density, etc.

As shown in Fig. 13, after knitting of the 3D shoe blank 200 is finished, without any sewing work, the 3D shoe blank 200 can be used on the last and molded to form a shoe body. 2. After the 3D shoe blank 200 is molded into the shoe body 2, the upper assembly 210 and the foresole assembly 220 may cover from the dorsal to the forefoot plantar portion, while the 3D rear shoe 100a comprised of rear portion 130 and heel portion 140 covers the rear lateral portions, the rear plantar portion, and the heel of the foot. Specifically, the inner edges of the upper 212 and upper extension portions 214a and 214b and the upper edge of the 3D rear shoe portion 100a (i.e., the outer edges of the rear 130 and heel portion 140) together they define a shoe opening 2a of the shoe body 2 to allow the foot to enter the interior space enclosed by the shoe body 2. The connection lines 202 and 203, respectively, start from two ends of the assembly line 201 and gradually extend outwardly and obliquely toward the 3D rear shoe portion 100a until reaching the shoe opening 2a, whereby the front sole assembly 220 preferably covers from the front plantar portion to two opposite front side portions. For example, the upper 212 and upper extension portions 214a and 214b may cover the dorsal surface of the forefoot, and the forefoot sole portion 122 and at least a portion of the forefoot extension portion 224 (such as the exposed portion 224c) covers the front plantar portion, while at least a portion of the forefoot extension portion 224 (such as covered portions 224a, 224b) extends upwardly to cover the front lateral portions. On the other hand, a part of the posterior part 130 covers the posterior plantar part, while another part of the posterior part 130 extends upward to cover the rear side portions and extends rearward to cover the heel with the heel portion 140. Thus, the shoe body 2 formed from the 3D shoe blank 200 of the invention it can substantially cover the dorsal part, the plantar part, the lateral sides and the heel of the foot.

The 3D shoe blank 100 or 200 is preferably knitted using the double-bed flat knitting machine with moving cams, which can change the direction of movement and drive the actions of the needles. In one embodiment, the method of knitting the 3D shoe blank using a double bed flat knitting machine includes: providing at least a first yarn (such as yarn 10) in a front needle bed and a front needle bed. rear of the double bed flat knitting machine by double needle jump knitting and providing at least a second yarn (such as yarn 20) on the rear needle bed to form an assembly line (such as 101,201); knitting the first yarn in the front needle bed and the rear needle bed by loop transfer and double jump knitting to form an upper part (such as 112, 212); knitting the second yarn on the rear needle bed by single jump knitting to form a front sole part (such as 122, 222), wherein the upper part and the front sole part are knitted alternately, and the front sole portion connects to the upper to form a pocket structure; knit continuing from the front sole portion into the front needle bed and the rear needle bed to form a rear part (such as 130), wherein, in forming the rear part, a plurality of live stitches (such as 31a~ 38a, 31b~38b) are preserved in the front needle bed on two sides of a rear end of the rear part; and knitting continuing from the center of the back end of the back on the front needle bed and the back needle bed by double knitting to form a heel portion (such as 140) with a predetermined number of stitches, wherein, when knitting of the heel part reaches the predetermined number of stitches on two opposite sides of the heel part, the rear needle bed moves transversely to knit sequentially and respectively the live stitches kept on the front needle bed on the two sides from the rear end of the rear portion together with the two opposite sides of the heel portion, whereby the heel portion and the rear portion are combined to form a 3D rear shoe portion (such as 100a) with two seam lines (such as 104a, 104b) formed between the heel portion (such as 140) and the back portion (such as 130) on the two opposite sides of the heel portion (such as 140), respectively. The 3D shoe blank (such as 100) is formed as an integral knit fabric without any sewn portion between the upper (such as 112), the front sole portion (such as 122), the rear (such as such as 130) and the heel portion (such as 140).

Hereinafter, referring to Figs. 14~16 and Figs. 1 to 13, the method for knitting the 3D shoe blank 100 or 200 using the double bed flat knitting machine is illustrated. In one embodiment, the method includes: providing at least one yarn (such as the first yarn 10) in a front needle bed FB and a rear needle bed BB by double jump knitting and providing at least one other yarn (such as as the second yarn 20) on the rear needle bed BB to form an assembly line 101 (or 201). For example, as shown in Fig. 14, at step S10, from left to right, the first yarn 10 is alternately knitted on the front needle bed FB and the rear needle bed BB with skipped needles (for example , a stitch on the front needle bed FB, skipped needles on the front and rear needle beds FB and BB, a stitch on the rear needle BB, then a stitch on the front needle bed FB, skipped needles on the front and rear needle beds FB, BB, a stitch on the rear needle BB, and so on), and the second yarn 20 is knitted continuously on the rear needle bed BB, so the first yarn 10 and the second yarn 20 together form the assembly line 101 (or 201) in the front needle bed FB and the rear needle bed BB. In other words, jump needle knitting refers to a manner of knitting in which certain needles of at least one of the front needle bed FB and rear needle bed BB are missing or not used without stitches thereon. . For example, double jump needle knitting refers to a manner of knitting that is performed alternately on the front needle bed FB and rear needle bed BB with certain needles of the needle beds missing or unused without stitches in the same. Simple jump needle knitting refers to a way of knitting that is mainly performed on the front needle bed FB or rear needle bed BB with certain needles of the needles missing or unused without stitches on them. On the other hand, it is noted that in forming the assembly line 101 (or 201), the beginning and the end of the first yarn 10 and the second yarn 20 are knitted preferably on the front needle bed FB.

The method further includes: knitting the first yarn 10 in the front needle bed FB and the rear needle bed BB continuing from the assembly line 101 (or 201) by loop transfer and double jump-needle knitting to form a upper part 112 (or 212), and knitting the second yarn 20 on the rear needle bed BB continuing from the assembly line by single jump knitting to form a front sole part 122 (or 222), wherein the upper part 112 (or 212) and the fore sole part 122 (or 222) are alternately knitted, and the fore sole part 122 (or 222) is connected to the upper part 112 (or 212) to form a structure pocket-size. For example, as shown in step S11 of Fig. 14, during the first knitting period P1, reverse knitting from right to left, using the first-order cam 401, the first yarn 10 is knitted by jump-needle knitting. alternately at the front needle bed FB and the rear needle bed BB to connect the assembly line 101 (or 201) and form the upper part 112 (or 212). In other words, the first yarn 10 is knitted according to the stitches thereof knitted in the front needle bed FB and the rear needle bed BB in the previous step S10, whereby the upper part 112 (or 212) is knitted alternately on the front needle bed FB and rear needle bed BB with skipped needles that are not used (it is i.e. double knitting with jump needles). Next, using the second order cam 402, a loop transfer step is performed, whereby the top points 112 are changed from an alternating arrangement with jumps to an arrangement without jumps. That is, the stitches formed by the first yarn 10 in the rear needle bed BB are transferred to the unoccupied needles of the front needle bed FB (ie, the skipped front needles) in the previous knitting. After transferring the stitches of the upper parts 112 (or 212), using the third-order cam 403, the second yarn 20 is knitted on the rear needle bed b B by needle jump knitting to connect the assembly line 101 (or 201) and form the forefoot portion 122 (or 222). That is, after loop transfer, the second yarn 20 is knitted according to the stitches thereof on the rear needle bed BB (that is, two adjacent stitches on the rear needle bed with a skipped needle in between). , whereby the forefoot portion 122 (or 222) is knitted by simple jump-needle knitting.

During the second knitting period P2 of step S11, knitting forward from left to right, using the first-order cam 401, the second yarn 20 is knitted on the rear needle bed BB by simple jump-needle knitting as shown. described above to form another row of foresole portion 122 (or 222). That is, according to the points of the front sole part 122 (or 222) on the rear needle bed BB, the front sole part 122 (or 222) is knitted on the rear needle bed BB and two adjacent points on the rear needle bed BB with a skipped needle in between. Next, using the second order cam 402, the loop transfer step is performed to change the top points 112 (or 212) from the non-jumped arrangement to the alternate jumped arrangement. That is, the loops previously transferred to the front needle bed FB are transferred back to their original positions in the rear needle bed BB. After transferring the top stitches 112 (or 212), using the third-order cam 403, the first yarn 10 is knitted by double jump-needle knitting on the front needle bed FB and the rear needle bed BB. to form the top 112 (or 212). That is, after loop transfer, the first yarn 10 is knitted according to the top stitches 112 (or 212) on the front needle bed FB and the rear needle bed BB to form the next row of needles. the top 112 (or 212). It is noted that, during the knitting process, since the knitting direction alternates between forward and backward, the order of the cams alternates accordingly. For example, during the second knitting period P2 of step S11, the first-order cam 401 is the third-order cam 403 in the first knitting period PI, and the third-order cam 403 is the first-order cam 401 in the first knitting period P1. Since the second-order cam 402 is arranged in the middle of the order, it does not matter whether it is in the forward or backward knitting period, the order of the second-order cam 402 remains the same.

During the third knitting period P3 of step S11, knitting backwards from right to left, using the first-order cam 401 (that is, the third-order cam 403 in the second knitting period P2), the first yarn 10 is knitted by double jump-needle knitting alternately on the front needle bed FB and the rear needle bed BB from the top 112 (or 212). Next, using the second order cam 402, the loop transfer step is performed, whereby the top points 112 (or 212) are changed from the alternating skip arrangement to the non-skip arrangement. That is, the top stitches 112 (or 212) formed by the first yarn 10 in the rear needle bed BB are transferred to the unoccupied needles in the front needle bed FB (that is, the skipped front needles) in the previous knit. After transferring the stitches of the tops 112 (or 212), using the third-order cam 403 (that is, the first-order cam 401 in the second knitting period P2), the second yarn 20 is knitted on the bed BB rear needle gauge by single jump knitting to form the next row of the front sole portion 122 (or 222).

During the fourth knitting period P4 of step S11, knitting forward from left to right, using the first-order cam 401 (that is, the third-order cam 403 in the third knitting period P3), the second yarn 20 is knitted on the rear needle bed BB by single jump knitting as described above to form another course of the front sole portion 122 (or 222). Next, using the second order cam 402, the loop transfer step is performed to change the top points 112 (or 212) from the non-jumped arrangement to the alternate jumped arrangement. That is, the upper loops 112 (or 212) previously transferred to the front needle bed FB are transferred back to their original positions in the rear needle bed BB. After transferring the top stitches 112 (or 212), using the third-order cam 403 (that is, the first-order cam 401 in the third knitting period P3), the first yarn 10 is knitted by double knitting with needle jumping alternately in the front needle bed FB and the rear needle bed BB from another row of the upper part 112 (or 212). That is, the knitting in the fourth knitting period P4 is substantially the same as the knitting in the second knitting period P2. By repeating the knitting in the second knitting period P2 and the third knitting period P3 of step S11, the upper part 112 (or 212) and the fore sole part 122 (or 222) can be alternately knitted until the formation is completed. of the upper part 112 (or 212) and the front sole part 122 (or 222). Specifically, by repeating the knitting in the second knitting period P2 and the third knitting period P3 of step S11, the pocket structure consisting of the upper part 112 and the fore sole part 122 of the shoe blank can be formed. 3D 100 in Figure 1 or the pocket structure made up of the upper part 212 and the forefoot part 222 of the 3D shoe blank 200 in Figure 2.

In forming the 3D shoe blank 200 of FIG. 7, the method further includes: knitting continuing from one side of a trailing end of the upper 212 by loop transfer and double jump knitting needled to form a first upper extension portion (such as 214a); knitting a third yarn (as shown in Figure 15) continuing from the other side of the trailing end of the top 212 by loop transfer and double jump-needle knitting to form a second top extension portion (such as 214b ), wherein the first upper extension part 214a and the second upper extension part 214b are spaced apart and are substantially symmetrical, whereby the first upper extension part 214a, the second upper extension part 214b and the upper part 212 are combine to form the top set 210; and knitting the second yarn 20 on the rear needle bed BB to form a front sole extension portion (such as 224) between the front sole portion 222 and the rear portion 130, wherein a portion of the sole extension portion foresole 224 corresponding to the first upper extension part 214a and the second upper extension part 214b (such as the covered parts 224a, 224b) is knitted by simple jump-needle knitting, and another part of the sole extension part 224 that does not correspond to the first upper extension part 214a and the second upper extension part 214b (such as the open part 224c) is knitted by simple knitting, whereby the front sole part 222 and the extension part of Forefoot 224 are combined to form forefoot assembly 220.

For example, as shown in Fig. 15 , in one embodiment, a step S12 of forming the upper extension portions 214a and 214b and the forefoot extension portion 224 includes: during the first knitting period P1, knitting forward from left to right, using the third-order cam 403, the first yarn 10 is knitted by jump needle knitting alternately on the front needle bed FB and the rear needle bed BB to form a row of the first part upper extension 214a. As such, the first upper extension portion 214a is connected to the left rear end of the upper portion 212 by spatial double knitting.

Step S12 further includes: during the second knitting period P2, knitting backwards from right to left, using the first-order cam 401, a third yarn 30 is provided at the left rear end of the top 212 and knitted. by double jump needle knitting alternately on the front needle bed FB and the rear needle bed BB to form a row of the second upper extension part 214b. As such, the second upper extension part 214b is connected to the right rear end of the upper part 212 and is knitted by spatial double knitting as described above. Next, using the second order cam 402, the loop transfer step is performed to change the points of the upper extension portions 214a and 214b from the alternate arrangement with jumps to the arrangement without jumps. That is, the stitches of the upper extension parts 214a and 214b formed by the first yarn 10 and the third yarn 30 in the rear needle bed BB are transferred to the corresponding unoccupied needles in the front needle bed FB (that is, skipped front needles) in the previous knitting. After the loop transfer, using the third-order cam 403, the second yarn 20 of the foresole portion 222 is knitted by single-needle jump knitting at a location corresponding to the second upper extension portion 214b on the bed. rear needle bed BB to form the right cover portion 224b, is knitted by continuous single knitting at a corresponding location between the upper extension portions 214a and 214b on the rear needle bed BB to form the uncovered portion 224c, and then is knitted by single jump-needle knitting at a location corresponding to the first upper extension part 214a on the rear needle bed BB to form the left cover part 224a, whereby the left cover part 224a, the uncover part 224c and the right covered part 224b together form the front sole extension part 224, which connects to the rear end of the of front sole 222.

During the third knitting period P3 of step S12, knitting forward from left to right, using the first-order cam 401 (that is, the third-order cam in the second knitting period P2), the second yarn 20 is knitted by single knitting with jump needles at a location corresponding to the first upper extension portion 214a on the rear needle bed BB to form another row of the left cover portion 224a, knitted by continuous single knitting at a location corresponding between the upper extension portions 214a and 214b on the rear needle bed BB to form another row of the bare portion 224c, and then knitted by single jump needle knitting at a location corresponding to the second upper extension portion 214b on the rear needle bed BB to form the right cover part 224b, whereby another row of the front sole extension part is knitted. tera 224. Next, using the second order cam 402, the loop transfer step is performed to change the points of the upper extension portions 214a, 214b from the alternating arrangement with jumps to the arrangement without jumps. That is, the loops of the upper extension portions 214a and 214b previously transferred to the front needle bed FB are transferred back to their original positions in the rear needle bed BB. After the loop transfer, using the third-order cam 403 (that is, the first-order cam in the second knitting period P2), the first yarn 10 is knitted by double jump-needle knitting alternately in the front needle bed FB and rear needle bed BB from another row of the first upper extension part 214a, and the third yarn 30 is knitted by double jump needle knitting alternately on the front needle bed FB and the rear needle bed BB to form another row of the second upper extension portion 214b.

During the fourth knitting period P4 of step S12, knitting backwards from right to left, using the first-order cam 401 (that is, the third-order cam 403 in the third knitting period P3), the third yarn 30 knitted by double jump needle knitting alternately on the front needle bed FB and the front needle bed rear needle bed BB from another row of the second upper extension part 214b, and the first yarn 10 is knitted by double jump needle knitting alternately in the front needle bed FB and the rear needle bed BB a starting from another row of the first upper extension part 214a. Next, using the second order cam 402, the loop transfer step is performed to change the points of the upper extension portions 214a, 214b from the alternating arrangement with jumps to the arrangement without jumps. That is, the stitches of the upper extension portions 214a, 214b formed respectively by the first yarn 10 and the third yarn 30 in the rear needle bed BB are transferred to the corresponding unoccupied needles in the front needle bed FB (i.e. , front needles skipped) in the previous knitting. After loop transfer, using the third-order cam 403 (that is, the first-order cam 401 in the third knitting period P3), the second yarn 20 of the foresole portion 222 is knitted by single knitting with needle jump at a location corresponding to the second upper extension part 214b in the rear needle bed BB to form the right cover part 224b, is knitted by continuous single knitting at a location corresponding to the space between the upper extension parts 214a and 214b on the rear needle bed BB to form the exposed portion 224c, and then knitted by single jump needle knitting at a location corresponding to the first upper extension portion 214a on the rear needle bed b B to form the left covered part 224a, whereby another row of the forefoot extension part 224 is knitted. Accordingly, repeating the third pe knitting period P3 and the fourth knitting period P4 of step S12, the knitting of the upper extension parts 214a, 214b and the fore sole extension part 224 can be completed, whereby the first upper extension part 214a, second upper extension portion 214b and upper 212 together form upper assembly 210, and forefoot extension portion 224 and forefoot sole portion 222 together form forefoot assembly 220. As such, the upper assembly 210 and foresole assembly 220 partially correspond to each other to form a pocket structure. The upper assembly 210 (including the upper part 212 and the upper extension parts 214a and 214b) formed by said double jump-needle knitting may have two technical surfaces to improve the structural strength of the upper assembly 210. foresole 220 corresponding to upper assembly 210 (such as foresole portion 222 and covered portions 224a and 224b) has a simple jump knit structure, while foresole assembly portion 220 not corresponding to upper assembly 220 . upper part 210 (such as the exposed part 224c) has a simple knit structure.

It is noted that the number of stitches of the upper extension portions 214a and 214b may be changed (such as gradually reduced or increased) during the knitting process to increase the diversity of the upper assembly 210.

In one embodiment, referring to Fig. 16, a step of forming the 3D rear shoe portion 100a of Fig. 4 or Fig. 10 is illustrated. For example, after the formation of the upper 112 and sole portion 122 of FIG. 1 or after the formation of the upper assembly 210 and the foresole assembly 210 of FIG. 7, the method includes: knitting continuing from the trailing end of the foresole portion 122 (or the extension portion sole 224) into the front needle bed FB and the rear needle bed BB to form the back 130. As described above, the yarn used to knit the back 130 may include the first yarn 10, the second yarn 20 and/or the third yarn 30, or another yarn. Alternatively, the yarn used to knit the back 130 may include the first yarn 10, the second yarn 20, and/or the third yarn 30 together with another yarn. In this embodiment, the yarns 10 and 20 continue to knit back and forth from left to right or right to left on the front needle bed FB and rear needle bed BB to form the back 130, thus that the rear part 130 connects to the rear end of the front sole part 122 (or the front sole extension part 224).

The heel portion 140 may be knitted from previously used yarns (such as 10, 20, 30) or another yarn. Alternatively, the heel portion 140 may be knitted from previously used yarns (such as 10, 20, 30) together with another yarn. For example, after forming the back 130, the yarns 10 and 20 are knitted on the front needle bed FB and the rear needle bed BB from the left side of the back 130 toward the center of the back 130. to form a predetermined number of stitches of the heel part 140, and a plurality of stitches (such as 31a~38a) are kept in the front needle bed FB on the right side of the rear end of the rear part 130. Note that when the heel portion 140 reaches the predetermined number of stitches on the right edge, the location of the rightmost stitch 41a of the heel portion 140, to be knitted, corresponds to the location of the innermost live stitch 31a. (i.e., leftmost) of the live stitches 31a~38a held at the right rear end of the back 130. By moving the rear needle bed BB crosswise, the 31a stitch of the back 130 is knitted with the back part. e of heel 140, whereby the right side of the heel portion 140 connects to the right rear end of the rear portion 130.

Next, reversing the knitting from right to left, the yarns 10 and 20 are knitted on the front needle bed FB and the rear needle bed BB from the right edge to the left edge of the heel portion 140 to form the next row of the heel part 140, and a plurality of live stitches (such as 31b~38b) are retained in the front needle bed FB on the left side of the rear end of the back part 130. It is noted that when the part of heel 140 reaches the predetermined number of stitches on the left edge, the location of the leftmost stitch 41b of the heel portion 140, to be knitted, corresponds to the location of the innermost live stitch 31b (i.e., furthest right) of live spots 31b~38b preserved in the left rear end of the rear part 130. By moving the rear needle bed BB transversely, the point 31b of the rear part 130 is knitted with the heel part 140, whereby the left side of the heel part 140 is connected to the rear left end of the rear 130.

The heel portion 140 is repeatedly knitted back and forth from right to left or left to right in a similar manner, wherein when the knitting of the heel portion 140 reaches the predetermined number of stitches on two opposite sides of the heel portion of heel 140, moving the rear needle bed BB crosswise, the live stitches (such as 31a~38a • 31b~38b) retained on the front needle bed FB at the right and left back ends of the back 130 are knitted sequentially and respectively with the right and left sides of the heel portion 140, whereby the heel portion 140 and the rear portion 130 are combined to form a 3D rear shoe portion 100a. For example, the number of live spots (such as 31b~38b) preserved at the left rear end of the rear part 130 is preferably the same as the number of live spots (such as 31a~38a) preserved at the left rear end. Right side of back 130. Therefore, by repeating double knitting of heel portion 140 on front needle bed FB and rear needle bed b B as described above, right side 32a back 130 is knitted with the heel portion 140 at the location of stitch 42a on the right edge, and the left live stitch 32b of the back 130 is knitted with the heel portion 140 at the location of stitch 42b on the left edge. . The right rib 33a of the back 130 is knitted with the heel portion 140 at the location of the stitch 43a on the right edge, and the left rib 33b of the back 130 is knit with the heel portion 140 on the right edge. location of point 43b on the left border. Right rib 34a of back 130 is knitted with heel portion 140 at the location of stitch 44a on the right edge, and left rib 34b of back 130 is knit with heel portion 140 at the location of stitch 44a on the right edge. location of point 44b on the left border. The right rib 35a of the back 130 is knitted with the heel portion 140 at the location of the stitch 45a on the right edge, and the left rib 35b of the back 130 is knit with the heel portion 140 at the location of the stitch 45a on the right edge. location of point 45b on the left border. Right rib 36a of back 130 is knitted with heel portion 140 at the location of stitch 46a on the right edge, and left rib 36b of back 130 is knit with heel portion 140 at the location of stitch 46a on the right edge. location of point 46b on the left border. The right rib 37a of the back 130 is knitted with the heel portion 140 at the location of the stitch 47a on the right edge, and the left rib 37b of the back 130 is knit with the heel portion 140 on the right edge. location of point 47b on the left border. Right rib 38a of back 130 is knitted with heel portion 140 at the location of stitch 48a on the right edge, and left rib 38b of back 130 is knit with heel portion 140 at the location of stitch 48a on the right edge. location of point 48b on the left border. Accordingly, the right edge of the heel portion 140 connects to the right rear end of the rear portion 130, whereby the seam line 104a is formed. The left edge of the heel portion 140 connects to the left rear end of the rear portion 130, whereby the seam line 104b is formed. As such, the heel portion 140 and the rear portion 130 are combined to form the 3D rear shoe portion 100a, and the 3D shoe blank 100 (or 200) is completed.

On the other hand, in addition to the design change in the upper part, the 3D shoe blank of the invention may have other modifications to achieve different external appearances or to provide other functions. As shown in Fig. 17 and Fig. 18, in a third embodiment, the 3D shoe blank 200' further includes an extension strap 150, which is partially connected to the heel portion 140 and extends outwardly, toward the two opposite sides of the heel portion 140. In this embodiment, the 3D shoe blank 200' is a modification of the 3D shoe blank 200 of FIG. 7, but the extension strap 150 can be applied to the 3D shoe blank 100 of FIG. 1. Extension strap 150 is preferably a strap knitted from at least one yarn and connected to heel portion 140. In one embodiment, extension strap 150 is preferably double knitted from the yarns (such as 10, 20 and/or 30) used in the previous knitting process or another yarn that is additionally introduced. In another embodiment, the extension strap 150 may be double knitted from the yarns (such as 10, 20 and/or 30) used in the above knitting process along with another yarn.

Corresponding to the design of the extension strap 150, the method of the invention further includes: double knitting on the front needle bed FB and the rear needle bed BB to form the extension strap 150, which is partially connected to the heel portion 140 and extends outward toward two opposite sides of the heel portion 140. That is, after forming the 3D rear shoe portion 100a, at least one yarn is provided and knitted to form the heel strap. extension 150, whereby one side of the extension strap 150 partially connects to the heel portion 140 and two ends of the extension strap 150 extend outward toward two opposite sides of the heel portion 140. For example , in the case of knitting from right to left to form the heel part 140, after knitting the left solid stitch 38b of the back part 130 with the left edge of the heel part 140 at the location of the stitch 48b, the thread of the p The beadwork 140 is continued to knit counterclockwise for a predetermined number of stitches to form the left strap portion of the extension strap 150. The knitting direction is then reversed to form the next course of the left strap portion. and to connect the heel portion 140. After the heel portion 140 is connected, knitting continues clockwise for a predetermined number of stitches to form the right strap portion of the extension strap 150. By repeating the knitting process from one side to the other, the extension strap 150 can be formed.

As shown in Fig. 19, after molding the 3D shoe blank 200' into a shoe body 2', the length of the extension strap 150 is preferably long enough to encircle the ankle (indicated by arrow 2b) of the wearer's foot and be fastened to form a knot. Therefore, not only the outer appearance of the shoe body 2' can be improved, but also the function of fixing the shoe body 2' is provided.

As shown in Fig. 20 and Fig. 21, in a fourth embodiment, a 3D shoe blank 200" further includes an extension portion 260, which is connected between the heel portion 140 and the extension strap 250. In this embodiment, the 3D shoe blank 200" is a modification of the 3D shoe blank 200 of FIG. 7, but the extension strap 250 and extension part 260 can be applied to the shoe in any case. 3D blank 100 of FIG. 1. The extension part 260 extends upwardly from the upper end of the heel part 140, whereby one side of the extension strap 250 is connected to the upper side of the extension part 260 and further connected to the heel portion 140 via the extension portion 260. For example, the extension portion 260 and the extension strap 250 are preferably knitted by double knitting from the yarns (such as 10, 20 and/or 30) used in the knitting process an interior or other thread. In another embodiment, the extension portion 260 and extension strap 250 may be knitted by double knitting from the yarns (such as 10, 20 and/or 30) used in the above knitting process together with another yarn.

Corresponding to the design of the extension portion 260, the method of the invention further includes: double knitting from the heel portion 140 on the front needle bed FB and the rear needle bed BB to form the heel portion extension 260 connected between the heel portion 140 and the extension strap 250. In one embodiment, the extension portion 260 is formed by continuing to knit the yarns of the heel portion 140, whereby the extension portion 260 extends upwards from the heel portion 140 and connects between the heel portion 140 and the extension strap 250. For example, in the case of knitting from right to left to form the heel portion 140, after knitting the live stitch 38b of the back part 130 with the left edge of the heel part 140 at the location of the point 48b, the yarn of the heel part 140 is reverse knitted from left to right to connect the heel part 140 and form the extension part n 260, and then the knitting process continues from side to side (that is, from right to left or from left to right) to complete the knitting of the extension strap 250. After forming the extension part 260, the knitting may continue, for example, to the left for a predetermined number of stitches to form the left strap portion of the extension strap 250. The knitting direction is then reversed to form the next row of the extension strap. of left strap and to connect the extension part 260, and knitting continues to the right for a predetermined number of stitches to form the right strap part of the extension strap 250. By repeating the knitting process back and forth , extension strap 250 can be formed.

As shown in Fig. 22, after the 3D shoe blank 200" is molded into a shoe body 2", the design of the extension part 260 can increase the convenience of wearing shoes and maintain a certain distance between the extension strap 250 and heel portion 140 to vary the outer appearance of shoe body 2". The length of extension strap 250 is preferably long enough to encircle the ankle (indicated by arrow 2b) of the shoe. user's foot and fastened to form a knot. Therefore, not only the outer appearance of the shoe body 2" can be improved, but also the function of fixing the shoe body 2" is provided.

Although preferred embodiments of the present invention have been described herein, the foregoing description is merely illustrative. The disclosed preferred embodiments shall not limit the scope of the present invention. Additional modifications of the invention disclosed herein will occur to those skilled in the respective arts and all such modifications are considered to be within the scope of the invention as defined in the appended claims.

Claims (13)

Claims 1. A method of knitting a three-dimensional (100, 200, 200', 200") shoe blank using a double bed flat knitting machine, comprising: providing at least a first yarn (10) in a front needle bed and a rear needle bed of the double bed flat knitting machine by double needle jump knitting and providing at least a second yarn (20) in the bed needle rear to form together an assembly line (101, 201); knit the first yarn (10) in the front needle bed and rear needle bed, continuing from the assembly line (101,201) by loop transfer and double knitting with jump needles to form an upper part (112, 212) ; knitting the second yarn on the rear needle bed continuing from the assembly line (101, 201) by single jump knitting to form a front sole portion (122, 222), wherein the upper portion (112, 212 ) and the front sole part (122, 222) are alternately knitted, and the front sole part (122, 222) is connected to the upper part (112, 212) to form a pocket structure; knit continuing from the front sole part (122, 222) into the front needle bed and the rear needle bed to form a back part (130), wherein, in forming the back part (130), a plurality of stitches alive are preserved in the front needle bed on two sides of a rear end of the rear part (130); Y knit continuing from the center of the rear end of the back part (130) on the front needle bed and the back needle bed by double knitting to form a heel part (140) with a predetermined number of stitches, wherein, when knitting of the heel portion 140 reaches the predetermined number of stitches on two opposite sides of the heel portion 140, the rear needle bed moves transversely to knit sequentially and respectively the live stitches held in the needle bed. front needles on the two sides of the rear end of the back part (130) together with the two opposite sides of the heel part (140), whereby the heel part (140) and the back part (130) are combined to form a 3D back shoe part (100a) with two seam lines (104a, 104b) formed between the heel part (140) and the back part (130) on the two opposite sides of the heel part (140) , respectively, and the piece of 3D raw shoe (100, 200, 200', 200") is formed as an integral knit fabric without any sewn parts between the upper part (112, 212), the front sole part (122, 222), the back (130) and heel portion (140). 2. The method of claim 1, further comprising: knitting continuing from one side of a trailing end of the upper part (212) by loop transfer and double jump-needle knitting to form a first upper extension part (214a); knit at least a third yarn continuing from the other side of the trailing end of the top (212) by loop transfer and double jump-needle knitting to form a second top extension portion (214b), wherein the first portion of upper extension 214a and second upper extension part 214b are separate and substantially symmetrical, whereby first upper extension part 214a, second upper extension part 214b, and upper part 112 ) are combined to form a top set (220); Y knitting the second yarn (20) on the rear needle bed to form a front sole extension portion (224) between the front sole portion (222) and the rear portion (130), wherein a portion of the sole portion Foresole extension 224 corresponding to the first upper extension part 214a and the second upper extension part 214b is knitted by single jump-needle knitting, and another part of the forefoot extension part ( 224) not corresponding to the first upper extension part (214a) and the second upper extension part (214b) is knitted by simple knitting, whereby the front sole extension part (222) and the front sole extension part ( 224) are combined to form a forefoot assembly (220). 3. The method of claim 1 or 2, wherein the back (130) is knitted from the second yarn or another yarn, or the back (130) is knitted from the second yarn together with another yarn. 4. The method of claim 1, 2 or 3, wherein the heel portion (140) is knitted from the second yarn or another yarn, or the heel portion (140) is knitted from the second yarn together with another thread. 5. The method of claims 1 or 2, further comprising: after forming the 3D back shoe part (100a), double knitting the front needle bed and the rear needle bed to form an extension strap (150), where the extension strap (150) connects partially to the heel portion (140) and extends outward toward the two opposite sides of the heel portion (140). 6. The method of claim 5, further comprising: double knitting from the heel part (140) on the front needle bed and the rear needle bed to form an extension part (260) connected between the heel part (140) and the extension strap (150) whereby the extension strap (150) is partially connected to the heel portion (140) by means of the extension portion (260). 7. A 3D shoe blank (100, 200, 200', 200"), the 3D shoe blank (100, 200, 200', 200") being an integral knit fabric without any sewn parts, comprising the 3D shoe blank (100, 200, 200', 200"): a foresole part (122, 222) connected to an upper part (112, 212) by a mounting line (101, 201) and two connecting lines (102, 103; 202, 203), whereby the part foresole (122, 222) and upper (112, 212) connect to form a pocket structure; a rear portion (130) connected to the front sole portion (122, 222); Y a heel portion (140) extending from a central rear end of the rear portion (130), two opposite sides of the heel portion (140) respectively connected to a left rear end and a right rear end of the rear portion (130), whereby the heel part (140) and the back part (130) are combined to form a 3D back shoe part (100a), and two seam lines (104a, 104b) are formed between the part heel portion (140) and back portion (130) on the two opposite sides of heel portion (140), respectively, characterized by upper portion (112, 212) having two technical surfaces knitted from at least one first yarn (10) by double jump-needle knitting, and by a part of the foresole part (122, 222) corresponding to the upper part (112, 212) that is knitted from at least one second yarn ( 20) by simple jump-needle knitting. 8. The 3D shoe blank (100, 200, 200', 200") of claim 7, wherein the two connecting lines (102, 103; 202, 203) are connected to two ends of the connecting line. assembly (101,201) and extend out and obliquely to an outer side of the 3D shoe blank (100, 200, 200', 200"). 9. The 3D shoe blank (100, 200, 200', 200") of claims 7 or 8, wherein the upper part (112, 212) substantially coincides with the front sole part (122, 222) in shape and size. 10. The 3D shoe blank (200, 200', 200") of claim 7 or 8, further comprising a first upper extension portion (214a) and a second upper extension portion (214b) connected to two sides of a trailing end of the upper (212), respectively, wherein the 3D shoe blank (200, 200', 200") further comprises a forefoot extension portion (224) connected between the front sole (222) and rear (130); the forefoot extension portion (224) partially corresponds to the first upper extension portion (214a) and the second upper extension portion (214b). 11. The 3D shoe blank (200, 200', 200") of claim 10, wherein the forefoot extension portion (224) comprises covered portions (224a, 224b) masked by the first portion of upper extension 214a and second upper extension portion 214b and an exposed portion 224c exposed between first upper extension portion 214a and second upper extension portion 214b; covered portions 224a, 224b) are knitted from the second yarn 20 by single jump-needle knitting, and the exposed portion 224c is knitted from the second yarn 20 by single knitting. 12. The 3D shoe blank (100, 200, 200', 200") of claim 7 or 8, further comprising an extension strap (150) partially connected to the heel portion (140) and extending extends outward towards the two opposite sides of the heel portion (140). 13. The 3D shoe blank (100, 200, 200', 200") of claim 12, further comprising an extension portion (260) connected between the heel portion (140) and the extension strap ( 150), whereby the extension strap (150) is partially connected to the heel portion (140) by means of the extension portion (260).