Particle foaming sole forming mold and sole preparation method thereof

Abstract

The invention relates to a particle foaming sole forming mold and a sole preparation method thereof.The particle foaming sole forming mold comprises an upper mold body and a lower mold body, the outer wall of the upper mold body is provided with a feeding pipe communicated with an upper mold cavity, and the bottom wall of the lower mold cavity is provided with a groove used for containing a hollowed-out bottom piece; a convex part is arranged on the bottom wall of the lower die cavity, a channel is axially arranged in the convex part in a penetrating manner, and the channel is connected with a vacuumizing device; the method for preparing the sole through the particle foaming sole forming mold comprises the steps that the bottom piece with the hollowed-out bottom is placed in the groove, and the bottom piece is fixed; the supporting sheet is adsorbed and fixed; the vacuumizing device vacuumizes the interior of the mold cavity, sucks popcorn particles and heats and foams water vapor in the mold cavity. The popcorn insole and the bottom piece are integrally formed in the mold, the operation steps are simple, and the production efficiency is high; the bottom piece is hollowed out, the top of the bottom piece is embedded into the popcorn insole, the bottom piece and the popcorn insole are firmly compounded, the sole is not prone to layer separation when encountering water, the service life of the sole is long, and the product quality is good.

Description

Technical Field

[0001] The invention relates to the technical field of sole manufacturing, in particular to a particle foaming sole forming mould and a sole manufacturing method thereof. Background Art

[0002] Popcorn shoe materials are favored by the market for their lightness and excellent shock-absorbing performance. The traditional popcorn sole includes an outsole and a midsole compounded on the outsole. The midsole is made of popcorn material and has the advantages of soft texture, good elasticity, strong cushioning performance, and good heat insulation performance. In the existing popcorn sole manufacturing process, the outsole and popcorn midsole are first made in different molds, and then the outsole is glued to the popcorn midsole by brushing glue, and finally the lining is added to become a finished shoe. The bonding requires manual bonding. This manual bonding method is cumbersome, time-consuming and labor-intensive, low in production efficiency, and high in labor costs. In addition, due to uneven manual operation, large errors in manual operation, and a high rate of defective products. The volatilization of the glue components during the compounding process pollutes the environment, is not environmentally friendly, and has a great harm to the health of workshop workers. In addition, the sole and upper bonded together by glue are not firmly bonded, and are easily debonded and delaminated when exposed to water, resulting in a short service life of the shoes and poor product quality. Summary of the invention

[0003] The invention provides a particle foaming sole forming mold and a sole preparation method thereof, so as to solve the problems of the existing popcorn soles, such as cumbersome composite operation, time-consuming and labor-intensive, low production efficiency, and environmentally unfriendly volatilization of glue.

[0004] The present invention adopts the following technical solution:

[0005] A particle foam sole forming mold comprises an upper mold and a lower mold, wherein an upper mold cavity is arranged in the upper mold, a feed pipe connected to the upper mold cavity is arranged on the outer wall of the upper mold, the lower mold is provided with a lower mold cavity matched with the upper mold cavity, a groove for placing a hollow bottom sheet is opened on the bottom wall of the lower mold cavity; a convex portion is arranged at the bottom of the groove, a gas transmission channel for vacuuming is arranged in the convex portion, and a vacuuming device is connected to the lower mold cavity through the gas transmission channel.

[0006] The method for preparing a shoe sole by using a particle foaming shoe sole forming mold comprises the following steps:

[0007] Step 1, put the bottom hollowed-out bottom film into the above groove and fix the bottom film;

[0008] Step 2, the support sheet is positioned so that the support sheet covers the channel opening of the convex part, the support sheet is closely attached to the channel opening, and a vacuum device is used to vacuum the channel of the convex part to fix the support sheet by adsorption;

[0009] Step 3, the vacuum device evacuates the mold cavity, sucks in popcorn particles, and heats the water vapor in the mold cavity to foam;

[0010] Step 4: foaming and molding, cooling and opening the mold, and the popcorn midsole and the bottom film are integrally formed in the mold.

[0011] Furthermore, a rubber gasket is adhered to the passage opening of the convex portion.

[0012] Furthermore, the supporting sheet at least comprises one of a carbon fiber sheet, a nylon sheet, and a polyurethane sheet, and preferably the supporting sheet is a carbon fiber sheet.

[0013] Furthermore, the hardness of the popcorn midsole after molding is 15-50 Shore C, and preferably the hardness of the popcorn midsole after molding is 45 Shore C.

[0014] Furthermore, a middle plate is provided between the upper mold and the lower mold, and the middle plate can be pulled out in the left and right directions. The middle plate enables the popcorn midsole with different hardness to be foamed up and down in the mold to form a double hardness popcorn midsole.

[0015] Furthermore, the thickness of the hollow bottom film is 1.0 mm to 2.5 mm, and preferably the thickness of the hollow bottom film is 2.0 mm.

[0016] Furthermore, the bottom film is made of thermoplastic polyurethane TPU material or cast cross-linked polyurethane GPU material.

[0017] From the above description of the structure of the present invention, it can be seen that compared with the prior art, the present invention has the following advantages:

[0018] 1. A hollow bottom sheet is placed in the lower mold of the present application. A convex portion for sucking and fixing the support sheet is provided in the lower mold. A vacuum is drawn to suck the popcorn particles into the mold cavity, which is then heated and formed by steam. The popcorn midsole and the bottom sheet are integrally formed in the mold. The operation steps are simple and the production efficiency is high.

[0019] 2. The bottom film of the present application is hollow, and the top of the bottom film is embedded in the popcorn midsole. The bottom film and the popcorn midsole are firmly compounded and are not easy to separate when exposed to water. The sole has a long service life and good product quality.

[0020] 3. The popcorn midsole and bottom film of the present application are integrally formed in a mold without the need for glue, thus saving material and labor costs and protecting the respiratory health of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the cross-sectional structure of the sole and the mold of the present invention.

[0022] Figure 2 It is a bottom view structural schematic diagram of the sole of the present invention.

[0023] Figure 3 It is a schematic diagram of the top structure of the sole of the present invention.

[0024] Figure 4 The sole edge of the present invention Figure 2 Schematic diagram of the cross-sectional structure along the AA direction. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0026] Reference Figures 1 to 4 A particle foaming sole molding mold comprises an upper mold 11 and a lower mold 12. An upper mold cavity 110 is arranged in the upper mold 11. A feed pipe 111 connected to the upper mold cavity 110 is arranged on the outer wall of the upper mold 11. The lower mold 12 is provided with a lower mold cavity 120 matched with the upper mold cavity 110. The opening of the upper mold cavity 110 and the opening of the lower mold cavity 120 are connected to form a sole mold cavity. A groove 122 for placing a hollow bottom sheet 22 is opened on the bottom wall of the lower mold cavity 120; a convex portion 121 is arranged at the bottom of the groove 122, and a gas transmission channel for vacuuming is arranged in the convex portion 121. The vacuuming device is connected to the lower mold cavity 120 through the gas transmission channel.

[0027] The method for preparing a shoe sole by using a particle foaming shoe sole forming mold comprises the following steps:

[0028] Step 1, refer to Figure 1 , the bottom hollowed-out bottom sheet 22 is placed into the above-mentioned groove 122, and the bottom sheet 22 is fixed, and the top of the bottom sheet 22 extends upward out of the groove 122, and the grooves 122 are distributed in the forefoot and heel parts of the sole;

[0029] Step 2, refer to Figure 1 The convex part 121 is located in the middle of the sole, the support sheet 20 is positioned, the support sheet 20 covers the channel opening of the convex part 121, the support sheet 20 is tightly fitted to the channel opening, a first air outlet pipe 123 connected to the channel is provided on the outer wall of the lower mold 12, and a vacuum device is connected to the first air outlet pipe 123, and the vacuum device vacuums the channel of the convex part 121 to adsorb and fix the support sheet 20;

[0030] Step 3, the vacuum device vacuums the mold cavity, a second air outlet pipe 112 is provided on the outer wall of the upper mold 11, the second air outlet pipe 112 is connected to the mold cavity, the vacuum device vacuums the mold cavity, sucks in popcorn particles, and the popcorn particles enter the mold cavity from the above-mentioned feed pipe 111 to heat and foam the water vapor in the mold cavity;

[0031] Step 4, foaming and molding, cooling and opening the mold, the popcorn midsole 21 and the bottom film 22 are integrally formed in the mold.

[0032] A rubber gasket (not shown) is glued to the passage opening of the convex portion 121 . The rubber gasket has an elastic buffering function, which facilitates vacuum suction and fixation of the support sheet 20 .

[0033] The supporting sheet 20 at least includes one of a carbon fiber sheet, a nylon sheet, and a polyurethane sheet. Preferably, the supporting sheet 20 is a carbon fiber sheet.

[0034] The hardness of the popcorn midsole 21 after molding is 15-50 Shore C, and preferably the hardness of the popcorn midsole 21 after molding is 45 Shore C.

[0035] A middle plate 13 is provided between the upper mold 11 and the lower mold 12. The middle plate 13 can be pulled out in the left and right directions. The middle plate 13 allows the mold to foam popcorn midsoles with different hardnesses up and down to form a double-hardness popcorn midsoles.

[0036] The thickness of the hollow bottom sheet 22 is 1.0-2.5 mm, and preferably the thickness of the hollow bottom sheet 22 is 2.0 mm.

[0037] The bottom film 22 is made of thermoplastic polyurethane TPU material or cast cross-linked polyurethane GPU material. Preferably, the bottom film 22 is made of thermoplastic polyurethane TPU material.

[0038] A hollow bottom film 22 is placed in the lower mold 12 of the present application, and a convex portion 121 is provided in the lower mold 12 for sucking and fixing the support sheet 20. A vacuum is drawn to suck popcorn grains into the mold cavity, and then the mold cavity is heated and formed by steam. The popcorn midsole 21 and the bottom film 22 are integrally formed in the mold, and the operation steps are simple and the production efficiency is high. The bottom film 22 is hollow, and the top of the bottom film 22 is embedded in the popcorn midsole 21. The bottom film 22 and the popcorn midsole 21 are firmly compounded and are not easy to separate when exposed to water. The sole has a long service life and good product quality.

[0039] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A particle foaming sole forming mold, comprising an upper mold and a lower mold, wherein an upper mold cavity is provided in the upper mold, and a feed pipe connected to the upper mold cavity is provided on the outer wall of the upper mold, characterized in that: The lower mold is provided with a lower mold cavity cooperating with the upper mold cavity, and a groove for placing a hollow film is opened on the bottom wall of the lower mold cavity; a convex portion is provided at the bottom of the groove, and a gas transmission channel for vacuuming is provided in the convex portion.

2. The method for preparing a shoe sole by using a particle foaming shoe sole forming mold according to claim 1, characterized in that: The steps include: Step 1, put the bottom hollowed-out bottom film into the groove and fix the bottom film; Step 2: Position the support sheet so that it covers the channel opening of the convex part and the support sheet fits the channel opening tightly. The vacuum device vacuums the channel of the convex part to fix the support sheet by suction. Step 3, the vacuum device evacuates the mold cavity, sucks in popcorn particles, and heats the water vapor in the mold cavity to foam; Step 4: foaming and molding, cooling and opening the mold, and the popcorn midsole and the bottom film are integrally formed in the mold.

3. The method for preparing a shoe sole by using a particle foaming shoe sole forming mold according to claim 2, characterized in that: A rubber gasket is adhered to the passage opening of the convex portion.

4. The method for preparing a shoe sole by using a particle foaming shoe sole forming mold according to claim 2, characterized in that: The support sheet includes at least one of a carbon fiber sheet, a nylon sheet, and a polyurethane sheet.

5. The method for preparing a shoe sole by using a particle foaming shoe sole forming mold according to claim 2, characterized in that: The hardness of the popcorn midsole after molding is 15 to 50 Shore C.

6. The method for preparing a shoe sole by using a particle foaming shoe sole forming mold according to claim 2, characterized in that: The thickness of the hollow bottom film is 1.0 mm to 2.5 mm.

7. The method for preparing a shoe sole by using a particle foaming shoe sole forming mold according to claim 2, characterized in that: The bottom film is made of thermoplastic polyurethane TPU material or cast cross-linked polyurethane GPU material.

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