JPH0317481B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a shoe with protrusions that is made of a plurality of layers made of a plurality of desired different materials by sequentially injecting, injecting, or injecting a sole main material and a protrusion material. This invention relates to a mold for manufacturing soles.

<Prior art> Conventional shoe sole molding molds for manufacturing shoe soles with projections made of multiple layers of different materials have two types of upper molds and lower molds, that is, shoes with projections, as shown in Fig. 1. A lower mold 14 having a recess 13 large enough to accommodate the protrusion of the second upper mold that pressurizes the bottom, and a cavity 15 in the shape of a protrusion are formed between the recess 19 of the lower mold 14 and the inside of the cavity 15. The required amount of material for the protruding portion is injected, injected, or fed to form the protruding portion, and then the first upper mold 11 is removed.
1, the second upper mold 18 and the lower mold 14 are abutted and fixed, and a sole main portion is provided between the protrusion in the recess 13 of the lower mold 14 and the protrusion 17 of the second upper mold 18. A shaped cavity 19 was formed, and the sole main portion material was supplied into the cavity 19 by a supplying means such as injection, injection, or feeding.

<Problems to be Solved by the Invention> The above-described conventional shoe sole mold supplies the protrusion material into the protrusion-shaped cavity 15 formed by the first upper mold 11 and the lower mold 14, and supplies the protrusion material to the second upper mold. The sole main body material is supplied into the sole main body shaped cavity 19 formed between the mold 18 and the lower mold 14 and the protruding portion in the recess 13, etc. Because the protruding portion and the sole main portion are not bonded too much by the foaming pressure of each material, there is a risk that these multiple layered portions may not be bonded sufficiently and may easily peel off. Each convex portion 1 of the second two types of both upper molds 11 and 18
There were defects such as a protruding part bulging out around the joint between the protruding part and the main body of the sole due to the mismatch between the concave part 13 of the lower mold and the protruding part, and it took time and effort to remove the protruding part.

<Means for Solving the Problems> As shown in FIGS. and a second mold which has a convex portion 3 in the shape of the upper surface of the sole main portion a on one surface, for example, the lower surface side, and forms a cavity 4 in the shape of the sole main portion between it and the recess 2 of the first mold a. b
A recess 6 having a bottom surface 5 shaped around the protruding portion of the sole is formed on one side, for example, on the lower surface side, and the second mold b
A cavity 7 in the shape of a protrusion is formed between the sole main part A formed in the second mold b and the recess 6, and a recess 8 for supplying the protrusion material C on the other surface, for example, the upper surface. A protruding portion material 2 is placed between the third mold c, in which each channel 9 is formed to connect the supply recess 8 and the protruding cavity 7, and the recess 8 of the third mold c on one side, for example, the lower surface. The sole main part A and the protrusion part B are pressed and firmly bonded by a sole molding mold such as a fourth mold d having a pressurizing convex part 10 formed thereon. It is something to do.

<Effect of operation> The shoe sole molding mold A of the present invention has a shoe main part A molded in the cavity 4 of the first mold a and the second mold b, a recessed part of the second mold b, etc., and the third mold c. The projection portion material 2 is supplied into the cavity 7 formed in step 6 through the supply recess 8 and channel 9 of the third mold c by known means such as injection, injection or feeding, and finally the fourth mold d is fed. The protrusion material 2 in the supply recess 8 is pressurized by the convex portion 10, and the protrusion material 2 is pushed through each channel 9 and the cavity 7 to one side of the sole main portion 1, for example, to the bottom side. This allows the protruding portion B to be molded in close contact. Therefore, the protrusion part B and the sole main part A are strongly and integrally bonded together, and the sole B with protrusions is not easily separated, such as a known one that is bonded simply by the foaming pressure of the material. can be provided.

<Example> The method of using the shoe sole molding mold A of the present invention to manufacture a shoe sole B with protrusions according to the drawings is as follows.

The shoe sole forming mold A is formed by forming the first mold a to the fourth mold d as independent and separate pieces, as shown in FIGS. 2 I to 2. b are abutted and fixed, and unfoamed liquid urethane or uncrosslinked synthetic resin is used to provide good flexibility in the sole-shaped cavity 4 formed between these molds a and b. Inject or inject the solution of the main body part C of the sole by a known means to form the main part A of the sole in the cavity 4, and use the third mold c instead of the first mold a to form the second mold b. The protruding side surface of the convex part 3 is covered and fixed, and the channel 9 is radiated from the supply recess 8 of the third mold c into the cavity 7 in the shape of a protrusion between the second mold b and the third mold. Inject or inject a protrusion material (d), such as unfoamed liquid polyurethane or uncrosslinked synthetic resin solution, which has better abrasion resistance and toughness than the sole main part material (c) by known means. Furthermore, the protrusion material 2 in the recess 8 of the third mold c is pressed into the cavity 7 from the recess 8 and each channel 9 by the convex portion 10 of the fourth mold d.

<Another Embodiment> In addition to the shoe sole molding mold A of the basic embodiment described above shown in FIGS. Alternatively, the second mold b to fourth mold d can be connected by a known connector e such as a hinge. In addition, the material for the main part of the sole and the material for the protruding parts to be supplied include not only unfoamed liquid polyurethane and unfoamed synthetic resin solution, but also unvulcanized natural rubber, synthetic rubber, or a mixture thereof. Rubber material can be loaded and supplied.

[Brief explanation of the drawing]

1 to 1 are schematic diagrams showing the main structure of a conventional shoe sole mold, and are cross-sectional views of the mold, and examples of cross-sectional views showing how to use the mold. FIGS. 2 to 2 are schematic diagrams showing the basic shoe sole forming mold of the present invention, and are cross-sectional views showing its main components, and are examples of cross-sectional views showing how to use the same. FIG. 3 is a schematic illustration of a sloped surface of a mold for forming a shoe sole according to another embodiment of the present invention. FIG. 4 is a schematic side view, partially cut away, of a shoe sole with protrusions manufactured by the shoe sole molding mold of the present invention. <Drawing code>, A...Mold for forming shoe soles, B...
Soles with protrusions, a...first type, b...second type, c...
...Third type, d...Fourth type, e...Connector, 1,5
... bottom surface, 2, 6 ... recessed part, 3, 10 ... convex part,
4, 7...Cavity, 8...Dent, 9...Channel...

Claims (1)

[Scope of Claims] 1. A first type having a concave portion having a bottom surface shaped like the bottom of the main body of the sole on one side, for example, the upper side, and a convex portion shaped like the top of the main body of the sole on one side, e.g. the bottom side. and a second mold forming a cavity in the shape of the main part of the shoe sole between the recess of the first mold, and a recess having a bottom surface in the shape of the periphery of the protruding portion of the sole on one side, for example, the lower surface side. A cavity shaped like a protrusion is formed between the second mold and the main part of the sole on the convex part of the second mold, and the recess, and a recess for supplying the material of the protrusion is formed on the other surface, for example, the upper surface. Further, a third mold formed with a channel that connects the supply recess and the protrusion-shaped cavity, and a convex portion for pressurizing the protrusion material between the recess of the third mold on one side, for example, the lower surface side. A mold for forming shoe soles consisting of a fourth mold, etc. 1. The shoe sole molding mold according to claim 1, wherein the first to fourth molds of the sole molding mold are formed as independent and separate pieces. 2. Claim 1, characterized in that the shoe sole molding mold comprises at least a second mold and a third mold, or the third mold and the fourth mold connected by a connecting member.
Mold for forming shoe soles as described in section.