TWI683044B - Circular knitting machine - Google Patents

Abstract

A circular knitting machine with a needle cylinder (11), in which cylinder needles (13) are mounted to be longitudinally displaceable, and a dial (12), in which rib dial needles (14) are mounted to be radially displaceable, wherein auxiliary elements (15), in particular sinkers, associated with the cylinder needles (13) and auxiliary elements (16), in particular sinkers, associated with the rib dial needles (14), as well as separate thread feeds to the cylinder needles (13) and to the rib dial needles (16) are provided, wherein separate tubular knits (19, 20) can be produced simultaneously or one after the other with the cylinder needles (13) and with the rib dial needles (14).

Description

Circular knitting machine

The present invention relates to circular knitting machines.

Today's new circular knitting machines arrive at a rate factor of SF = 1500 (= diameter x revolutions). However, because of high needle wear, there is a limit to further increase in this rate factor. This rate factor can only be reached by limiting the path of movement of the pins, and using sinkers that can move relatively and the flattest possible rounded triangle for the pins. Further optimization can be achieved through the development of appropriate needle geometry and new needle materials. Nevertheless, it is very unlikely to reach a rate factor higher than SF=2000.

The purpose of forming the basis of the present invention is to further increase the productivity of conventional circular knitting machines with structurally simple measures.

This object is achieved by a circular knitting machine, which has a cylinder, in which the cylinder needle is installed to be longitudinally displaceable; and a dial, in which the ribbed dial needle is installed to be radially displaceable, and which is provided with These syringe needles have associated auxiliary Auxiliary elements [especially sinkers], and auxiliary elements [especially sinkers] associated with the ribbed dial needles, and separate yarns to the cylinder needles and to the ribbed dial needles Feeding, and the divided tubular knitted fabrics therein can be produced with the cylinder needles and with the ribbed dial needles simultaneously or sequentially.

With the circular knitting machine according to the present invention, a tubular knitted fabric can be produced on the cylinder and on the dial at the same time, and as a result, its productivity is doubled compared to conventional knitting machines. The knitting machine according to the invention will correspond to a conventional machine with a rate factor of SF=3000. In this case, the two tubular knitted fabrics can be knitted exactly or differently, for example in different colors. The yarn feed can be formed by a common yarn guide with a plurality of bobbins or by a plurality of separate yarn guides.

However, it is also possible for the circular knitting machine according to the present invention to produce the two-tubular knitted fabric on the needle cylinder and on the dial successively.

It is particularly advantageous if different knitted fabrics, in particular knitted fabrics of different finenesses, are produced with the cylinder needles and with the ribbed dial needles.

When the two tubular knitted fabrics are knitted one after another, since the two characteristic tubular knitted fabrics can be knitted one after another and in any desired interlace without any modification of the machine during the transition period, the productivity is better than traditional machines Result.

Furthermore, it is possible to use a dial with a smaller diameter than the needle cylinder, so that two knitted fabrics of different diameters can be produced on the machine.

The circular knitting machine according to the invention can of course also be operated as a conventional machine, which only produces tubular knitted fabric on the cylinder. It is also possible to produce knitted fabrics exclusively on this dial.

The removal of the produced fiber web can be performed in different ways.

In this way, the tubular knitted fabric formed by the cylinder needles and the ribbed dial needles can be collectively removed by the removal device or by the separate removal device.

The knitted fiber webs produced simultaneously on the needle cylinder and on the dial are located inside one another. A common removal device equipped with a yarn divider and a cutting device on both sides can be provided for these. The knitted fabric produced can then be wound into a doubling machine as four flat webs.

Another option is that a common removal device can be provided, which has an open frame and a cutting device on one side. One of the two tubular knitted fabrics on the inner side of the other is cut and unfolded on one side. They are then wound into two broad, flat fiber webs by retracting the winding drum.

However, the circular knitting machine may also have a removal device with an open frame and a removal device without an open frame. This allows one tubular knitted fabric to be directly wound and another tubular knitted fabric to be cut, unfolded and wound into a flat web.

In contrast, in another configuration of the circular knitting machine, one or two folding devices are provided for the tubular knitted fabric produced. If four fabrics are produced by cutting the tubular knitted fabric on both sides, four folding devices can also be provided.

All conventional techniques for circular knitting machines can be used in the needle step forming process on the needle cylinder and the dial.

In a preferred embodiment of the circular knitting machine according to the invention, during the formation of the needle step, during the raising movement of the cylinder needles, it is constructed as a sinker The associated auxiliary elements perform a contraction movement, and during the formation of the needle step, the associated auxiliary elements perform an ascending movement during the retraction movement of the syringe needles. As a result of this relative movement between the needles and the auxiliary element, compared to machines with fixed sinkers or sinkers as the needles move in the same direction, since the needles only need to be implemented About half of the reciprocating movement, a high knitting rate can be reached.

In principle, this technology can also be applied in the case of this dial. In this way, during the rising movement of the ribbed dial needles, during the formation of the needle step, the associated auxiliary element constructed as a sinker performs a contraction movement, and during the formation of the needle step, the ribbed needle During the contraction movement of the coiled needle, these associated auxiliary elements perform a lifting movement.

Of course, it is particularly preferable to provide this relative movement between the needles and the auxiliary elements on the barrel and on the dial. The machine can therefore be operated with a maximum number of turnovers.

Although these auxiliary elements are preferably constructed as sinkers, tongue needles, compound needles or crochet needles can be used as needles.

A further advantage can be achieved if a syringe triangle segment is provided, the syringe triangle has a needle triangle for controlling the raising and retreating movement of the syringe needle and sinker triangle, which is used for The auxiliary element can be caused to perform an upright movement and/or a swinging movement around the horizontal axis. As a result of this, the auxiliary element acts as a decoiling or press-fit sinker and ensures reliable needle step formation.

Similarly, a dial triangle segment can be provided which has a needle triangle for controlling the raising and retreating movement of the ribbed dial needle and sinker triangle, In this way, the auxiliary element for the ribbed dial needle can be caused to perform radial movement and/or orbiting movement about the horizontal axis. Because of at least the required radial movement of the ribbed dial needles, the configuration of the dial triangle segments is clearly more complicated than the configuration of the cylinder triangle segments. This is more applicable, the smaller the diameter of the dial.

Preferably, the auxiliary elements are also installed in the syringe and the dial respectively. They can thus be controlled jointly with the needles of the corresponding cylinder and/or dial triangle segments. However, these auxiliary elements can also be installed in separate devices like sinker rings. With the triangular segments of the dial, in this case, the control of the movement of the auxiliary elements in the dial is particularly needed. These auxiliary elements must be moved and rotated radially.

In another optional configuration of the machine, the auxiliary elements may also be fixed-type decoupling discs. In this configuration, triangular parts or other driving devices for moving these auxiliary elements can be omitted.

Furthermore, the cylinder needles and/or the ribbed dial needles can be constructed as crochet needles, and the associated auxiliary elements are constructed as needle hook spring needle closing elements. Circular knitting machines with correspondingly constructed cylinder needles are known, for example, from GB 188449 A1 or GB 114144 A1.

In another preferred configuration of the circular knitting machine, the dial can be adjusted in height, and the auxiliary elements and the yarn to the ribbed dial needles are fed to or to the cylinder needles The feeding can be rendered ineffective, so that a fine ribbed tubular knitted fabric can be produced jointly with the cylinder needles and with the ribbed dial needles.

Machines equipped in this way, double the single-sided tubular knitted fabric or double Knitted fabrics such as fine ribbed knitted fabrics can be produced. In this case, it was possible to switch the machine to different operating modes without substantial expenditure. Therefore, the customer has a choice between the production of single-sided goods with high productivity or the production of double-sided goods.

A possible exemplary embodiment of a circular knitting machine according to the invention is described in more detail below with reference to this illustration.

10‧‧‧Circular knitting machine

11‧‧‧ syringe

12‧‧‧ dial

13‧‧‧ syringe needle

14‧‧‧ribbed dial needle

15‧‧‧Accessories

16‧‧‧Accessories

17‧‧‧ Yarn

18‧‧‧ Yarn

19‧‧‧ knitted fabric

20‧‧‧ knitted fabric

21‧‧‧ knitted fabric

30‧‧‧Cylinder triangle fragment

31‧‧‧double arrow

32‧‧‧Needle control triangle

33‧‧‧pin

34‧‧‧double arrow

35‧‧‧pin

36‧‧‧Control triangle

37‧‧‧swirl triangle

38‧‧‧swirl triangle

40‧‧‧Dial Triangle Fragment

41‧‧‧Control triangle

43‧‧‧swirl triangle

1 is a schematic partial view of a cylinder and a dial of a circular knitting machine according to the present invention; FIG. 2 is a view corresponding to the circular knitting machine with a lowered dial in FIG. 1; FIG. 3 is a circular knitting machine from FIG. 1 A detailed view of the triangular parts of the cylinder of the machine; Figure 4 is a detailed view of the triangular parts of the dial of the circular knitting machine from Figure 1.

The detailed view of the circular knitting machine 10 in FIG. 1 shows the cylinder 11 and the dial 12. The syringe needle 13 is installed so as to be longitudinally displaceable in the syringe 11. Each needle 13 has an associated auxiliary element 15 in the form of a sinker for needle step formation. Similarly, the ribbed dial needle 14 and associated auxiliary element 16 in the form of sinkers are installed in the dial 12.

Yarns 17, 18 are fed to the cylinder needles 13 and the ribbed needles, respectively Both disk needle 14. The first tubular knitted fabric 19 is produced from the yarn 17 via the cylinder needles 13. The ribbed dial needles 14 simultaneously form the second tubular knitted fabric 20 from the yarn 18, which is located in the first tubular knitted fabric 19, and is removed along with the first tubular knitted fabric. Therefore, with the circular knitting machine 10 shown, twice the amount of fabric can be produced simultaneously, as on a conventional circular knitting machine. Of course, it is also possible to produce these tubular knitted fabrics 19 and 20 one after another. In this case, the tubular knitted fabrics 19 and 20 can even be produced in different fineness qualities, patterns and colors.

Although FIG. 1 shows the circular knitting machine 10 raising the dial 12 with respect to the cylinder 11, the machine 10 in FIG. 2 is shown with the dial 12 in the lowered position. These sinkers 15 and 16 are in the non-operating position. Only one yarn 17 is fed, whereby the cylinder needles 13 and the ribbed dial needles 14 collectively produce a fine ribbed tubular knitted fabric 21.

Thus, as a result of the upright adjustability of the dial 12 with respect to the cylinder 11, the divided tubular knitted fabric 19, 20 or the common double-sided tubular knitted fabric 21 can be attached to the cylinder 11 or the needle by the circular knitting machine Any one of the disks 12 is produced.

FIG. 3 shows a detailed illustration of the cylinder triangle section 30 from the circular knitting machine 10 of FIG. 1. The movement of the syringe needles 13 and the sinkers 15 is controlled by the triangular section 30. The needle control cam 32 is provided to control the upright movement of the needles 13 in the direction of the double arrow 31, the needles 13 enter the needle control cams to engage with the pins 33.

The sinkers 15 perform an upright movement in the direction of the double arrow 34 and a circular movement around the pin 35. The pin 35 is installed in the control three At angle 36, it controls these upright movements. Upper and lower turning triangles 37, 38 are provided for this turning movement. In this case. The triangular section 30 is constructed in such a way that the needles 13 and the sinker 15 can move relative to each other, that is, the sinkers 15 are retracted during the raising movement of the needles 13 and in the The needle 13 is raised and turned during the retreating movement. This results in a rather small upright movement of the needles 13 and the sinkers 15, which allows very high machine speeds.

FIG. 4 shows a dial triangle segment 40 of the circular knitting machine 10 of FIG. 1, which is constructed in a similar manner to the cylinder triangle segment 30. For reasons of clarity, the ribbed dial needles and associated control triangles used for their radial movement have been omitted from this illustration.

The triangular segments 40 are arranged above the dial 12 and have a first control cam 41 for the radial movement of the sinkers 16 on their bottom side. These sinkers 16 also perform the orbiting motion controlled by the front and rear orbiting triangles 42, 43. In this case, the center of rotation used for the orbiting motions is located in the control triangle 41. The dial triangle segments 40 are also constructed in such a manner that the ribbed dial needles 14 and the sinkers 16 perform relative movements in order to shorten the relative movements of the needles.

The circular knitting machines shown in FIGS. 1 to 4 are only possible exemplary embodiments of circular knitting machines according to the present invention. Compound needles or crochet needles can also be used instead of the latch needles 13 and 14 shown. These auxiliary elements 15 and 16 do not necessarily require sinkers, but instead they can also be designed as needle hook spring needle closing elements, for example. Furthermore, it is possible that the auxiliary elements 15 and 16 are arranged outside the barrel 11 and the dial 12. In this variant, the syringe It is also possible to form a knitted fabric on the dial at the same time.

10‧‧‧Circular knitting machine

11‧‧‧ syringe

12‧‧‧ dial

13‧‧‧ syringe needle

14‧‧‧ribbed dial needle

15‧‧‧Accessories

16‧‧‧Accessories

17‧‧‧ Yarn

18‧‧‧ Yarn

19‧‧‧ knitted fabric

20‧‧‧ knitted fabric

Claims (13)

A circular knitting machine having a cylinder (11) and a dial (12), wherein the cylinder needle (13) is installed to be longitudinally displaceable in the cylinder (11), and the ribbed dial needle (14) is installed as It can be displaced radially in the dial (12), and is characterized by a sinker associated with the syringe needles (13) as an auxiliary element (15), and the ribbed dial needle ( 14) Associated sinker as auxiliary element (16), and separate yarn feeding to the cylinder needles (13) and to the ribbed dial needles (14), and separate tubular knitting The mesh (19, 20) can be produced simultaneously with the cylinder needles (13) and with the ribbed dial needles (14), wherein the knitted by the ribbed dial needles (14) The tubular mesh (20) is located inside the tubular mesh (19) knitted by the cylinder needles (13). For example, the circular knitting machine according to item 1 of the patent scope, in which the same or different nets (19, 20) [especially nets of different finenesses] can be used for the cylinder needles (13) and the same It is produced in ribbed dial needles (14). For example, the circular knitting machine according to item 1 or 2 of the patent application, in which the tubular mesh (19, 20) formed by the cylinder needles (13) and the ribbed dial needles (14) can be Remove collectively by removing the device or by separate removing devices. For example, the circular knitting machine according to item 3 of the patent application has a removal device, which is equipped with a yarn divider and a cutting device on both sides. For example, the circular knitting machine according to item 3 of the patent application has a removal device, which has an open frame and a cutting device on one side. For example, the circular knitting machine in item 3 of the patent application, which has Removal device for open frame and removal device without open frame. For example, the circular knitting machine according to item 3 of the patent application scope is provided with one, two or four folding devices for the tubular meshes (19, 20) already produced. For example, the circular knitting machine according to item 1 or 2 of the patent application scope, in which the associated auxiliary element (15) constructed as a sinker is implemented during the raising motion of the needles (13) during the formation of the needle step The contraction movement, and during the formation of the needle step, when the syringe needles (13) are retracted, the associated auxiliary elements (15) perform an ascending movement. For example, the circular knitting machine according to item 1 or 2 of the patent application scope, in which the ribbed dial needle (14) is constructed as an associated auxiliary element of the sinker during the raising movement of the ribbed dial needle (14) during the formation of the needle step 16) Perform a contraction movement, and during the formation of the needle step, during the contraction movement of the ribbed dial needles (14), the associated auxiliary elements (16) perform an ascending movement. A circular knitting machine as claimed in item 1 or 2 of the patent application, in which a cylinder triangle section (30) is provided, which has a needle triangle (32) for controlling the raising and retracting movement of the cylinder needles (13) , And sinker triangles (36, 37, 38), the syringe triangle segments can cause the auxiliary elements (15) of the syringe needles (13) to perform an upright movement and/or a revolving movement around a horizontal axis. For example, the circular knitting machine according to item 1 or 2 of the patent application, which is provided with a dial triangle segment (40), which is used to control the ribbed dial needle (14) and the sinker triangle (41, 42, 43 ) Of the raised and retracted moving cam triangles, the dial triangle segments can cause the auxiliary elements (16) of the ribbed dial needles (14) to perform radial motion and/or circling motion around the horizontal axis. For example, the circular knitting machine of claim 1 or 2, wherein the auxiliary elements (15, 16) are installed in the needle cylinder (11) and the dial (12), respectively, or in separate devices. For example, the circular knitting machine of patent application item 1 or 2, wherein the dial (12) is height-adjustable, and the auxiliary elements (15, 16) and the yarn to the ribbed dial needles (14) The thread feeding or the yarn feeding to the cylinder needles (13) can be rendered ineffective, so that the fine ribbed tubular knitted fabric (21) can be used with the cylinder needles (13) and with the The equal-ribbed dial needle (14) is produced jointly.

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