阅读说明：本技术 一种大底吸塑成型的复合鞋底制造方法 (Manufacturing method of composite sole formed by plastic suction of outsole ) 是由 杨仙岳 施凯 张衡 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种大底吸塑成型的复合鞋底制造方法,其制备方法主要是将TPU薄膜加热软化后,吸塑成型为鞋底形状,冷却后得到TPU鞋底；其中所述TPU鞋底包括底壁和侧壁,底部与侧壁形成容腔；将含有发泡剂的耐磨层浆料耐磨层叠于TPU鞋底内部,得到鞋大底初胚；将EVA发泡中底初胚与鞋大底初胚通过复合定位孔和复合定位导柱自动化装配,经发泡、热压、开模、冷却、切边裁剪处理,得到所述的大底吸塑成型的复合鞋底。本发明的复合鞋底具有优异的耐磨、防滑性、柔软舒适性,同时解决了中底材料和大底材料用胶粘剂粘合易脱胶的问题,得到了高性能的大底吸塑成型的复合鞋底。(The invention discloses a method for manufacturing a composite sole formed by plastic uptake of an outsole, which mainly comprises the steps of heating and softening a TPU film, carrying out plastic uptake forming to obtain a sole shape, and cooling to obtain a TPU sole; the TPU sole comprises a bottom wall and a side wall, and the bottom and the side wall form a cavity; wear-resistant layer slurry containing foaming agent is laminated inside the TPU sole in a wear-resistant manner to obtain a shoe outsole blank; and (3) automatically assembling the EVA foamed insole initial blank and the outsole initial blank through a composite positioning hole and a composite positioning guide pillar, and performing foaming, hot pressing, die sinking, cooling, trimming and cutting to obtain the outsole plastic-suction-molded composite sole. The composite sole has excellent wear resistance, skid resistance, softness and comfort, and solves the problem that the insole material and the outsole material are easy to degum by being bonded by the adhesive, so that the high-performance outsole plastic-sucking molded composite sole is obtained.)

1. A manufacturing method of a composite sole formed by plastic uptake of an outsole is characterized by comprising the following steps:

(1) respectively preparing a plastic suction forming mold for preparing the shape of the sole, a PU composite foaming mold, a first mold for preparing an initial blank of the large sole and a second mold for preparing an initial blank of the insole, wherein the initial blank of the large sole comprises a preset composite positioning hole, and the initial blank of the insole comprises a preset composite positioning guide pillar and a sole extension edge;

(2) heating and softening the TPU film with the thickness of 1-3 mm, fixing the TPU film on the plastic suction forming mold prepared in the step (1) through a plastic suction machine, carrying out plastic suction forming to obtain a sole shape, and cooling to obtain the TPU sole; the TPU sole comprises a bottom wall and a side wall, and the bottom and the side wall form a cavity;

(3) placing the TPU sole obtained in the step (2) into the first mold prepared in the step (1), adding wear-resistant layer slurry containing foaming agents into the first mold, enabling the wear-resistant layer to be laminated inside the TPU sole, controlling the temperature to be 66-116 ℃ by using cooling water, forming into a blank, cooling, demoulding and taking out to obtain a shoe outsole blank;

(4) injecting the EVA foaming mixed slurry into the second mold prepared in the step (1) through an injection molding machine, controlling the temperature at 66-116 ℃ by using cooling water, forming into a blank, cooling, demoulding and taking out to obtain an insole initial blank;

(5) automatically assembling the shoe outsole blank in the step (3) and the insole blank in the step (4) through a composite positioning hole and a composite positioning guide post, placing the assembled shoe outsole blank and insole blank in the PU composite foaming mold prepared in the step (1), heating the PU composite foaming mold to compound the shoe outsole blank and the insole blank, and heating to 166-116 ℃ for foaming; and then carrying out hot pressing, die opening, cooling, trimming and cutting to obtain the outsole plastic-suction-molded composite sole.

2. The method for manufacturing a composite shoe sole by plastic uptake molding of outsole as claimed in claim 1, wherein in step (2), the TPU film is of transparent structure; the heating softening temperature is 75-16 ℃.

3. The method for manufacturing the composite sole of the outsole blister molding according to claim 1, wherein in the step (3), the wear-resistant layer slurry containing the foaming agent comprises the following raw materials in parts by weight: 66-86 parts of polyester polyol, 56-76 parts of isocyanate, 5-16 parts of calcium carbonate, 1-3 parts of chain extender, 6.5-2 parts of coupling agent and 5-16 parts of wear-resistant agent.

4. The method for manufacturing the composite sole of the outsole blister molding according to claim 3, wherein in the step (3), the wear-resistant layer slurry containing the foaming agent comprises the following raw materials in parts by weight: 75 parts of polyester polyol, 66 parts of isocyanate, 8 parts of calcium carbonate, 2 parts of chain extender, 1.5 parts of coupling agent, 8 parts of wear-resistant agent and 6.3-6.8 parts of foaming agent.

5. The method for manufacturing the composite sole of the outsole blister molding according to claim 1, wherein in the step (4), the EVA foaming mixed slurry comprises the following raw materials in parts by weight: 66-86 parts of EVA, 16-15 parts of polyester elastic resin, 6.5-2 parts of mica, 6.1-1.5 parts of foaming agent, 6.2-1 part of zinc stearate and 1-3 parts of carboxylated graphene.

6. The method for manufacturing the composite sole of the outsole blister molding according to claim 5, wherein in the step (4), the EVA foaming mixed slurry comprises the following raw materials in parts by weight: 75 parts of EVA, 15 parts of polyester elastic resin, 2 parts of mica, 1.5 parts of foaming agent, 1 part of zinc stearate and 3 parts of carboxylated graphene.

7. The method for manufacturing the composite sole of the outsole through plastic uptake molding according to claim 5, wherein in the step (4), the preparation method of the EVA foaming mixed rubber material comprises the following steps: feeding the EVA, the polyester elastic resin, the mica and the carboxylated graphene in parts by weight into a high-speed mixer, and mixing for 5-16 min at the rotating speed of 1666-3666 r/min to obtain an EVA mixture; adding the zinc stearate in parts by weight into the EVA mixture, and stirring at 85-166 ℃ for 5-16 min; and then adding the foaming agent in parts by weight, and stirring to obtain the EVA foaming mixed rubber material.

Technical Field

The invention relates to the technical field of shoemaking, in particular to a method for manufacturing a composite sole formed by plastic uptake of an outsole.

Background

The materials used for manufacturing the shoe outsole at present mainly comprise common rubber, TPR thermoplastic rubber, TPU thermoplastic polyurethane elastomer and the like, and the common rubber material is a thermosetting elastomer and has the defects of heavy weight, easiness in blooming, difficulty in corrosion, poor air permeability, poor moisture absorption and the like; compared with common rubber, the TPR thermoplastic rubber has simple processing technology, can repeatedly recycle leftover and reclaimed materials, avoids the environmental pollution problem caused by the fact that common vulcanized rubber wastes such as vulcanizing and the like cannot be simply recycled, and has the characteristics such as the property of the common rubber; the TPU thermoplastic polyurethane elastomer is a copolymer prepared from hard segment materials and soft segment materials, has good strength, abrasion value, weather resistance and chemical corrosion resistance, and the sole made of the TPU has the advantages of light weight, high strength, good toughness, excellent wear resistance and folding resistance, wide hardness and density adjustable range, good thermal insulation performance, skid resistance, oil resistance, comfortable wearing and the like.

The preparation of TPU sole materials usually adopts processing methods such as injection molding, extrusion, calendering and the like, and in the common thermoplastic material processing technology of TPU, the viscosity of the thermoplastic polyurethane elastomer can be changed in a large range at a low temperature, so that the application of TPU sole materials on shoe bodies is limited.

The structure of the sole not only comprises an outsole, but also generally comprises a midsole, wherein the midsole is a layer structure which is in contact with the sole of a foot, and plays a role in shaping and supporting the whole shoe. At present, the insole and the outsole are compounded by gluing the insole and the outsole together, but the gluing effect achieved by adopting the adhesive has the defects of insecurity, environmental protection, easy degumming, complex working procedures and the like.

Disclosure of Invention

In view of the above, the present invention provides a method for manufacturing a composite sole by plastic suction molding of an outsole, so as to solve the above technical problems.

The invention provides the following technical scheme:

a manufacturing method of a composite sole formed by plastic uptake of an outsole comprises the following steps:

(1) respectively preparing a plastic suction forming mold for preparing the shape of the sole, a PU composite foaming mold, a first mold for preparing an initial blank of the large sole and a second mold for preparing an initial blank of the insole, wherein the initial blank of the large sole comprises a preset composite positioning hole, and the initial blank of the insole comprises a preset composite positioning guide pillar and a sole extension edge;

(2) heating and softening the TPU film with the thickness of 1-3 mm, fixing the TPU film on the plastic suction forming mold prepared in the step (1) through a plastic suction machine, carrying out plastic suction forming to obtain a sole shape, and cooling to obtain the TPU sole; the TPU sole comprises a bottom wall and a side wall, and the bottom and the side wall form a cavity;

(3) placing the TPU sole obtained in the step (2) into the first mold prepared in the step (1), adding wear-resistant layer slurry containing foaming agents into the first mold, enabling the wear-resistant layer to be laminated inside the TPU sole, controlling the temperature to be 66-116 ℃ by using cooling water, forming into a blank, cooling, demoulding and taking out to obtain a shoe outsole blank;

(4) injecting the EVA foaming mixed slurry into the second mold prepared in the step (1) through an injection molding machine, controlling the temperature at 66-116 ℃ by using cooling water, forming into a blank, cooling, demoulding and taking out to obtain an insole initial blank;

(5) automatically assembling the shoe outsole blank in the step (3) and the insole blank in the step (4) through a composite positioning hole and a composite positioning guide post, placing the assembled shoe outsole blank and insole blank in the PU composite foaming mold prepared in the step (1), heating the PU composite foaming mold to compound the shoe outsole blank and the insole blank, and heating to 166-116 ℃ for foaming; and then carrying out hot pressing, die opening, cooling, trimming and cutting to obtain the outsole plastic-suction-molded composite sole.

Preferably, in the step (2), the TPU film is of a transparent structure; the heating softening temperature is 75-16 ℃.

Preferably, in the step (3), the wear-resistant layer slurry containing the foaming agent comprises the following raw materials in parts by weight: 66-86 parts of polyester polyol, 56-76 parts of isocyanate, 5-16 parts of calcium carbonate, 1-3 parts of chain extender, 6.5-2 parts of coupling agent and 5-16 parts of wear-resistant agent.

More preferably, in the step (3), the wear-resistant layer slurry containing the foaming agent comprises the following raw materials in parts by weight: 75 parts of polyester polyol, 66 parts of isocyanate, 8 parts of calcium carbonate, 2 parts of chain extender, 1.5 parts of coupling agent, 8 parts of wear-resistant agent and 6.3-6.8 parts of foaming agent.

Preferably, in the step (4), the EVA foaming mixed slurry comprises the following raw materials in parts by weight: 66-86 parts of EVA, 16-15 parts of polyester elastic resin, 6.5-2 parts of mica, 6.1-1.5 parts of foaming agent, 6.2-1 part of zinc stearate and 1-3 parts of carboxylated graphene.

More preferably, in the step (4), the EVA foaming mixed slurry comprises the following raw materials in parts by weight: 75 parts of EVA, 15 parts of polyester elastic resin, 2 parts of mica, 1.5 parts of foaming agent, 1 part of zinc stearate and 3 parts of carboxylated graphene.

More preferably, in step (4), the preparation method of the EVA foaming mixed size comprises: feeding the EVA, the polyester elastic resin, the mica and the carboxylated graphene in parts by weight into a high-speed mixer, and mixing for 5-16 min at the rotating speed of 1666-3666 r/min to obtain an EVA mixture; adding the zinc stearate in parts by weight into the EVA mixture, and stirring at 85-166 ℃ for 5-16 min; and then adding the foaming agent in parts by weight, and stirring to obtain the EVA foaming mixed rubber material.

According to the technical scheme, the invention has the beneficial effects that:

the TPU film is used as a shoe outsole material, so that the shoe outsole material has excellent wear resistance, slip resistance, softness and comfort; the formed TPU cavity is filled with wear-resistant layer slurry, so that the wear resistance and elasticity of the shoe outsole are effectively improved; the insole material adopts EVA foaming mixed slurry, and the addition of the carboxylated graphene improves the resilience and the dimensional stability of the insole material; the shoe outsole blank and the insole blank are combined through the PU composite die, the preset foaming coefficient is achieved through thermal foaming, the shoe outsole blank and the insole blank are thermally pressed under the action of heat, two materials are bonded, the problem that the insole material and the outsole material are bonded by an adhesive and are easy to degum is solved, and the high-performance composite shoe sole formed by plastic suction of the outsole is obtained.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.

Example 1

Manufacturing method of composite sole formed by plastic suction of outsole

The manufacturing method of the composite sole formed by plastic uptake of the outsole comprises the following steps:

(1) respectively preparing a plastic suction forming mold for preparing the shape of the sole, a PU composite foaming mold, a first mold for preparing an initial blank of the large sole and a second mold for preparing an initial blank of the insole, wherein the initial blank of the large sole comprises a preset composite positioning hole, and the initial blank of the insole comprises a preset composite positioning guide pillar and a sole extension edge;

(2) heating and softening a TPU film with the thickness of 1mm at 75 ℃, fixing the TPU film on the plastic suction forming mold prepared in the step (1) through a plastic suction machine, carrying out plastic suction forming to obtain a sole shape, and cooling to obtain a TPU sole; the TPU sole comprises a bottom wall and a side wall, and the bottom and the side wall form a cavity;

(3) placing the TPU sole obtained in the step (2) into the first mold prepared in the step (1), adding wear-resistant layer slurry containing a foaming agent into the first mold, laminating the wear-resistant layer slurry inside the TPU sole, controlling the temperature to be 66 ℃ by using cooling water, forming a blank, cooling, demoulding and taking out to obtain a shoe outsole blank;

(4) injecting the EVA foaming mixed slurry into the second mold prepared in the step (1) through an injection molding machine, controlling the temperature at 66 ℃ by using cooling water, forming into a blank, cooling, demoulding and taking out to obtain an insole primary blank;

(5) automatically assembling the shoe outsole blank in the step (3) and the insole blank in the step (4) through a composite positioning hole and a composite positioning guide post, placing the assembled shoe outsole blank and insole blank in the PU composite foaming mold prepared in the step (1), heating the PU composite foaming mold to compound the shoe outsole blank and the insole blank, and heating to 166 ℃ for foaming; and then carrying out hot pressing, die opening, cooling, trimming and cutting to obtain the outsole plastic-suction-molded composite sole.

In the step (3), the wear-resistant layer slurry containing the foaming agent comprises the following raw materials in parts by weight: 66kg of polyester polyol, 56kg of isocyanate, 5kg of calcium carbonate, 1kg of chain extender, 6.5kg of coupling agent and 5kg of wear-resisting agent.

In the step (4), the EVA foaming mixed slurry comprises the following raw materials in parts by weight: EVA66kg, polyester elastic resin 16kg, mica 6.5kg, foaming agent 6.1kg, zinc stearate 6.2kg, and carboxylated graphene 1 kg.

In the step (4), the preparation method of the EVA foaming mixed sizing material comprises the following steps: feeding the EVA, the polyester elastic resin, the mica and the carboxylated graphene in parts by weight into a high-speed mixer, and mixing for 5min at the rotating speed of 1666r/min to obtain an EVA mixture; adding the zinc stearate in parts by weight into the EVA mixture, and stirring for 5min at 85 ℃; then adding the foaming agent in parts by weight, and stirring to obtain the EVA foaming mixed rubber material.

Example 2

Manufacturing method of composite sole formed by plastic suction of outsole

The manufacturing method of the composite sole formed by plastic uptake of the outsole comprises the following steps:

(1) respectively preparing a plastic suction forming mold for preparing the shape of the sole, a PU composite foaming mold, a first mold for preparing an initial blank of the large sole and a second mold for preparing an initial blank of the insole, wherein the initial blank of the large sole comprises a preset composite positioning hole, and the initial blank of the insole comprises a preset composite positioning guide pillar and a sole extension edge;

(2) heating and softening a TPU film with the thickness of 2mm at 86 ℃, fixing the TPU film on the plastic suction forming mold prepared in the step (1) through a plastic suction machine, carrying out plastic suction forming to obtain a sole shape, and cooling to obtain a TPU sole; the TPU sole comprises a bottom wall and a side wall, and the bottom and the side wall form a cavity;

(3) placing the TPU sole obtained in the step (2) into the first mold prepared in the step (1), adding wear-resistant layer slurry containing a foaming agent into the first mold, laminating the wear-resistant layer slurry inside the TPU sole, controlling the temperature to be 76 ℃ by using cooling water, forming a blank, cooling, demoulding and taking out to obtain an initial blank of the outsole;

(4) injecting the EVA foaming mixed slurry into the second mold prepared in the step (1) through an injection molding machine, controlling the temperature at 76 ℃ by using cooling water, forming into a blank, cooling, demoulding and taking out to obtain an insole primary blank;

(5) automatically assembling the shoe outsole blank in the step (3) and the insole blank in the step (4) through a composite positioning hole and a composite positioning guide post, placing the assembled shoe outsole blank and insole blank in the PU composite foaming mold prepared in the step (1), heating the PU composite foaming mold to compound the shoe outsole blank and the insole blank, and heating to 176 ℃ for foaming; and then carrying out hot pressing, die opening, cooling, trimming and cutting to obtain the outsole plastic-suction-molded composite sole.

In the step (3), the wear-resistant layer slurry containing the foaming agent comprises the following raw materials in parts by weight: 65kg of polyester polyol, 55kg of isocyanate, 6kg of calcium carbonate, 1.5kg of chain extender, 1kg of coupling agent and 6kg of wear-resisting agent.

In the step (4), the EVA foaming mixed slurry comprises the following raw materials in parts by weight: EVA65kg, polyester elastic resin 12kg, mica 1kg, foaming agent 6.8kg, zinc stearate 6.5kg, and carboxylated graphene 1.5 g.

In the step (4), the preparation method of the EVA foaming mixed sizing material comprises the following steps: feeding the EVA, the polyester elastic resin, the mica and the carboxylated graphene in parts by weight into a high-speed mixer, and mixing for 6min at the rotating speed of 1566r/min to obtain an EVA mixture; adding the zinc stearate in parts by weight into the EVA mixture, and stirring for 6min at 16 ℃; then adding the foaming agent in parts by weight, and stirring to obtain the EVA foaming mixed rubber material.

Example 3

Manufacturing method of composite sole formed by plastic suction of outsole

The manufacturing method of the composite sole formed by plastic uptake of the outsole comprises the following steps:

(1) respectively preparing a plastic suction forming mold for preparing the shape of the sole, a PU composite foaming mold, a first mold for preparing an initial blank of the large sole and a second mold for preparing an initial blank of the insole, wherein the initial blank of the large sole comprises a preset composite positioning hole, and the initial blank of the insole comprises a preset composite positioning guide pillar and a sole extension edge;

(2) heating and softening a TPU film with the thickness of 2mm at 86 ℃, fixing the TPU film on the plastic suction forming mold prepared in the step (1) through a plastic suction machine, carrying out plastic suction forming to obtain a sole shape, and cooling to obtain a TPU sole; the TPU sole comprises a bottom wall and a side wall, and the bottom and the side wall form a cavity;

(3) placing the TPU sole obtained in the step (2) into the first mold prepared in the step (1), adding wear-resistant layer slurry containing a foaming agent into the first mold, laminating the wear-resistant layer slurry inside the TPU sole, controlling the temperature to be 86 ℃ by using cooling water, forming a blank, cooling, demoulding and taking out to obtain a shoe outsole blank;

(4) injecting the EVA foaming mixed slurry into the second mold prepared in the step (1) through an injection molding machine, controlling the temperature at 166 ℃ by using cooling water, forming into a blank, cooling, demoulding and taking out to obtain an insole primary blank;

(5) automatically assembling the shoe outsole blank in the step (3) and the insole blank in the step (4) through a composite positioning hole and a composite positioning guide post, placing the assembled shoe outsole blank and insole blank in the PU composite foaming mold prepared in the step (1), heating the PU composite foaming mold to compound the shoe outsole blank and the insole blank, and heating to 186 ℃ for foaming; and then carrying out hot pressing, die opening, cooling, trimming and cutting to obtain the outsole plastic-suction-molded composite sole.

In the step (3), the wear-resistant layer slurry containing the foaming agent comprises the following raw materials in parts by weight: 75kg of polyester polyol, 66kg of isocyanate, 8kg of calcium carbonate, 2kg of chain extender, 1.5kg of coupling agent, 8kg of wear-resistant agent and 6.3-6.8 kg of foaming agent.

In the step (4), the EVA foaming mixed slurry comprises the following raw materials in parts by weight: EVA75kg, polyester elastic resin 15kg, mica 2kg, foaming agent 1.5kg, zinc stearate 1kg, and carboxylated graphene 3 kg.

In the step (4), the preparation method of the EVA foaming mixed sizing material comprises the following steps: feeding the EVA, the polyester elastic resin, the mica and the carboxylated graphene in parts by weight into a high-speed mixer, and mixing for 16min at the rotating speed of 3666r/min to obtain an EVA mixture; adding the zinc stearate in parts by weight into the EVA mixture, and stirring for 16min at 16 ℃; then adding the foaming agent in parts by weight, and stirring to obtain the EVA foaming mixed rubber material.

Example 4

Manufacturing method of composite sole formed by plastic suction of outsole

The manufacturing method of the composite sole formed by plastic uptake of the outsole comprises the following steps:

(1) respectively preparing a plastic suction forming mold for preparing the shape of the sole, a PU composite foaming mold, a first mold for preparing an initial blank of the large sole and a second mold for preparing an initial blank of the insole, wherein the initial blank of the large sole comprises a preset composite positioning hole, and the initial blank of the insole comprises a preset composite positioning guide pillar and a sole extension edge;

(2) heating and softening the TPU film with the thickness of 1 mm-3 mm at 85 ℃, fixing the TPU film on the plastic suction forming mold prepared in the step (1) through a plastic suction machine, carrying out plastic suction forming to obtain a sole shape, and cooling to obtain the TPU sole; the TPU sole comprises a bottom wall and a side wall, and the bottom and the side wall form a cavity;

(3) placing the TPU sole obtained in the step (2) into the first mold prepared in the step (1), adding wear-resistant layer slurry containing a foaming agent into the first mold, laminating the wear-resistant layer slurry inside the TPU sole, controlling the temperature to be 116 ℃ by using cooling water, forming a blank, cooling, demoulding and taking out to obtain a shoe outsole blank;

(4) injecting the EVA foaming mixed slurry into the second mold prepared in the step (1) through an injection molding machine, controlling the temperature at 116 ℃ by using cooling water, forming into a blank, cooling, demoulding and taking out to obtain an insole primary blank;

(5) automatically assembling the shoe outsole blank in the step (3) and the insole blank in the step (4) through a composite positioning hole and a composite positioning guide post, placing the assembled shoe outsole blank and insole blank in the PU composite foaming mold prepared in the step (1), heating the PU composite foaming mold to compound the shoe outsole blank and the insole blank, and heating to 186 ℃ for foaming; and then carrying out hot pressing, die opening, cooling, trimming and cutting to obtain the outsole plastic-suction-molded composite sole.

In the step (3), the wear-resistant layer slurry containing the foaming agent comprises the following raw materials in parts by weight: 75kg of polyester polyol, 76kg of isocyanate, 8kg of calcium carbonate, 2.5kg of chain extender, 1.5kg of coupling agent and 8kg of wear-resisting agent.

In the step (4), the EVA foaming mixed slurry comprises the following raw materials in parts by weight: EVA75kg, polyester elastic resin 14kg, mica 1.8kg, foaming agent 1.2kg, zinc stearate 6.1kg, and carboxylated graphene 2.8 kg.

In the step (4), the preparation method of the EVA foaming mixed sizing material comprises the following steps: feeding the EVA, the polyester elastic resin, the mica and the carboxylated graphene in parts by weight into a high-speed mixer, and mixing for 8min at the rotating speed of 2666r/min to obtain an EVA mixture; adding the zinc stearate in parts by weight into the EVA mixture, and stirring for 8min at 15 ℃; then adding the foaming agent in parts by weight, and stirring to obtain the EVA foaming mixed rubber material.

Example 5

Manufacturing method of composite sole formed by plastic suction of outsole

The manufacturing method of the composite sole formed by plastic uptake of the outsole comprises the following steps:

(1) respectively preparing a plastic suction forming mold for preparing the shape of the sole, a PU composite foaming mold, a first mold for preparing an initial blank of the large sole and a second mold for preparing an initial blank of the insole, wherein the initial blank of the large sole comprises a preset composite positioning hole, and the initial blank of the insole comprises a preset composite positioning guide pillar and a sole extension edge;

(2) heating and softening a TPU film with the thickness of 3mm at 16 ℃, fixing the TPU film on the plastic suction forming mold prepared in the step (1) through a plastic suction machine, carrying out plastic suction forming to obtain a sole shape, and cooling to obtain a TPU sole; the TPU sole comprises a bottom wall and a side wall, and the bottom and the side wall form a cavity;

(3) placing the TPU sole obtained in the step (2) into the first mold prepared in the step (1), adding wear-resistant layer slurry containing a foaming agent into the first mold, laminating the wear-resistant layer slurry inside the TPU sole, controlling the temperature to be 126 ℃ by using cooling water, forming a blank, cooling, demoulding and taking out to obtain an initial blank of the outsole;

(4) injecting the EVA foaming mixed slurry into the second mold prepared in the step (1) through an injection molding machine, controlling the temperature at 116 ℃ by using cooling water, forming into a blank, cooling, demoulding and taking out to obtain an insole primary blank;

(5) automatically assembling the shoe outsole blank in the step (3) and the insole blank in the step (4) through a composite positioning hole and a composite positioning guide post, placing the assembled shoe outsole blank and insole blank in the PU composite foaming mold prepared in the step (1), heating the PU composite foaming mold to compound the shoe outsole blank and the insole blank, and heating to 116 ℃ for foaming; and then carrying out hot pressing, die opening, cooling, trimming and cutting to obtain the outsole plastic-suction-molded composite sole.

In the step (3), the wear-resistant layer slurry containing the foaming agent comprises the following raw materials in parts by weight: 86kg of polyester polyol, 76kg of isocyanate, 16kg of calcium carbonate, 3kg of chain extender, 2kg of coupling agent and 16kg of wear-resisting agent.

In the step (4), the EVA foaming mixed slurry comprises the following raw materials in parts by weight: EVA86kg, polyester elastic resin 15kg, mica 2kg, foaming agent 1.5kg, zinc stearate 1kg, and carboxylated graphene 3 kg. .

In the step (4), the preparation method of the EVA foaming mixed sizing material comprises the following steps: feeding the EVA, the polyester elastic resin, the mica and the carboxylated graphene in parts by weight into a high-speed mixer, and mixing for 16min at the rotating speed of 3666r/min to obtain an EVA mixture; adding the zinc stearate in parts by weight into the EVA mixture, and stirring for 16min at 166 ℃; then adding the foaming agent in parts by weight, and stirring to obtain the EVA foaming mixed rubber material.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.