CN113683832A

CN113683832A - Formula and preparation method of environment-friendly EVA (ethylene vinyl acetate) foamed sole

Info

Publication number: CN113683832A
Application number: CN202111194763.0A
Authority: CN
Inventors: 张聪渊; 张桓章
Original assignee: Zhongshan Fine Shoes Co ltd
Current assignee: Zhongshan Fine Shoes Co ltd
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2021-11-23

Abstract

The invention provides an environment-friendly EVA (ethylene vinyl acetate copolymer) foaming sole formula and a preparation method thereof, and relates to the technical field of shoemaking. The formula of the environment-friendly EVA foaming sole comprises the following raw materials in parts by mass: 70-85 parts of EVA (ethylene vinyl acetate), 15-25 parts of POE (polyolefin elastomer), 5-15 parts of thermoplastic ethylene propylene rubber, 5-8 parts of polyvinyl cerolate, 2-10 parts of octene, 8-19 parts of ethylene, 15-26 parts of amide group high polymer, 2-5 parts of dicumyl peroxide, 0.2-0.8 part of di-tert-butylperoxyisopropyl benzene, 0.4-2 parts of palmitic acid, 20-30 parts of silica gel and 5-13 parts of talcum powder. The sole can guarantee well the drawing of patterns through the sole in shoemaking that the sole has good quality, saves raw materials cost through the fine foaming of sole, makes shoes have fine frictional properties through the silica gel granule.

Description

Formula and preparation method of environment-friendly EVA (ethylene vinyl acetate) foamed sole

Technical Field

The invention relates to the technical field of shoemaking, in particular to an environment-friendly EVA foaming sole formula and a preparation method thereof.

Background

The EVA sole is made of EVA material, and has high rebound resilience, high tensile strength, high toughness, excellent shock resistance, high buffering performance, excellent heat insulating, cold preventing and low temperature performance, good flexibility, rubber elasticity, high flexibility at 0 deg.c, high transparency, high surface gloss, high chemical stability, high ageing resistance, high ozone resistance and no toxicity. Good mixing property with the filler and good coloring and forming processability.

At present, when the EVA foaming sole is produced and processed, the sole material can not be well demoulded after injection molding due to the particularity of the EVA material, so that a plurality of shoe making processes can adjust the processes in various modes for ensuring the demoulding quality of the sole, but the effect is not good, at present, when the EVA sole is prepared, due to the fact that the EVA raw material needs to be mixed, a large amount of DCP materials are conventionally added, but the material consumption is large, the economic cost of EVA sole production can be increased, and when the EVA sole on the market is used, the ground holding capacity can not be good due to the fact that the friction force of the EVA sole is not good.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the formula and the preparation method of the environment-friendly EVA foaming sole, and solves the problems that the existing EVA sole cannot be well demoulded, the material cost is high, and the using performance of the shoe is poor due to weak friction force of the sole when the shoe is used.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: an environment-friendly EVA foaming sole formula comprises the following raw materials in parts by mass: 70-85 parts of EVA (ethylene vinyl acetate), 15-25 parts of POE (polyolefin elastomer), 5-15 parts of thermoplastic ethylene propylene rubber, 5-8 parts of polyvinyl cerolate, 2-10 parts of octene, 8-19 parts of ethylene, 15-26 parts of amide group high polymer, 2-5 parts of dicumyl peroxide, 0.2-0.8 part of di-tert-butylperoxyisopropyl benzene, 0.4-2 parts of palmitic acid, 20-30 parts of silica gel and 5-13 parts of talcum powder.

Preferably, the amide group polymer is polyamide or polyurethane, and the particle size of the talcum powder is 300-500 meshes.

Preferably, the preparation method of the formula of the environment-friendly EVA foaming sole comprises the following steps:

s1, preheating the raw materials, namely preheating the EVA raw material and the thermoplastic ethylene propylene rubber by using an internal mixer;

s2, mixing and melting the raw materials, and sequentially adding amide group high polymer, dicumyl oxide, di-tert-butylperoxyisopropyl benzene and palmitic acid into an internal mixer in S1;

s3, banburying and mixing, namely sequentially putting the POE raw material, polyvinyl cerolate, octene, ethylene and talcum powder into a banbury mixer for banburying and mixing;

s4, preparing silica gel particles, cutting and forming the silica gel, and drilling the silica gel particles to form hollow silica gel particles;

s5, mixing and extruding the raw materials which are mixed and refined in the step S3 to obtain raw material sheets;

s6, fusion preparation, namely putting the hollow silica gel particles obtained in the step S4 into a preheated mold, cutting the raw material pieces obtained in the step S5 into pieces, putting the pieces into the mold, then placing the mold on a flat vulcanizing machine for foaming, releasing pressure, putting the foamed material pieces into an oven for baking, and then obtaining the finished product of the sole.

Preferably, the step of preheating the raw material in the step S1 is as follows: adjusting the internal temperature of a bin of an internal mixer to 120 ℃ below zero, preheating an open mill, putting EVA raw materials and thermoplastic ethylene propylene rubber into the internal mixer for primary internal mixing after the internal temperature is reached, slowly heating to 150 ℃ below zero during the internal mixing, wherein the stirring speed for the internal mixing is 30-40rpm/min, and the internal mixing time is 5-10 minutes.

Preferably, the step of kneading and melting the raw materials in the step S2 is:

a. mixing the amide group high polymer, dicumyl peroxide, di-tert-butylperoxyisopropyl benzene, palmitic acid and 75% ethanol, heating to 80-90 ℃, and completely dissolving dicumyl peroxide to obtain a standby auxiliary agent;

b. and (b) adding the auxiliary agents for later use in the step a into an internal mixer, fully mixing the raw materials in the step S1 with the auxiliary agents for later use, carrying out internal mixing by using the rotating speed of 40-50rpm/min after mixing, gradually increasing the temperature of a bin of the internal mixer to 175 ℃, keeping internal mixing for 5-7 minutes after the temperature reaches, then continuing internal mixing for 5-6 minutes, and then slowly reducing the internal mixing temperature of the internal mixer to 110 ℃.

Preferably, the banburying and mixing step in the step S3 is as follows: sequentially adding the POE raw material, polyvinyl cerotic acid ester, octene, ethylene and talcum powder into an internal mixer for milling and mixing, and milling at the temperature of 110-125 ℃ and the rotating speed of 45-65rpm/min for 8-15 minutes to obtain the finished raw material after the milling is finished.

Preferably, the step of preparing the silica gel particles in the step of S4 is: selecting a finished silica gel raw material, preparing the silica gel raw material into a square or round shape with the particle size of 3-5 mm, drilling holes in silica gel particles by taking a central point in the silica gel as a center, drilling two holes in each silica gel particle, taking the central point of each silica gel particle as a vertical hole in each hole, and arranging the small holes which are vertical to each other in each silica gel particle to obtain the silica gel raw material particles.

Preferably, the step of scouring the raw material sheet in the step S5 is: and (3) putting the raw materials in the internal mixer in the S3 into an open mill for opening the pull tab, wherein the temperature of the open mill is set at 190 ℃, the thickness of the sheet of the open mill pull tab is 10-50 mm, and the width of the sheet is 100-200 mm.

Preferably, the step of fusion preparation of the step S6 is:

selecting a sole mold, coating a layer of polysiloxane water-based emulsion release agent in the sole mold, preheating the mold to 180-210 ℃, then putting the silica gel raw material particles obtained in the step S4 into the sole mold, uniformly distributing the silica gel raw material particles into the mold, distributing 8-10 silica gel raw material particles in each mold, and then cutting the sheets obtained in the step S5 into a piece in an area suitable for the size of the mold;

and (3) placing the mold into a vulcanizing machine, then carrying out foaming molding, wherein the temperature of the vulcanizing machine is 180-210 ℃, the mold pressing is 10-20 MPa, and the molding time is 2-8 minutes, and then taking out the mold, cooling and taking out the product to obtain the EVA foamed sole.

Preferably, in the step S6, the mold taken out is cooled by a cooling mechanism.

(III) advantageous effects

The invention provides a formula and a preparation method of an environment-friendly EVA (ethylene-vinyl acetate copolymer) foamed sole. The method has the following beneficial effects:

1. according to the invention, the EVA foaming sole can be well demoulded during manufacturing by adding the thermoplastic ethylene propylene rubber and the polyvinyl ceryl acetate in the formula, the EVA raw material can be fully crosslinked by fusing the high polymer of the octene and the amide group into the EVA raw material, the raw material can not be adhered to the inner wall by the palmitic acid, and meanwhile, the arrangement of the step of mixing and melting the raw material in the subsequent process is matched, the temperature is gradually increased and decreased, so that the EVA foaming sole raw material can be uniformly and fully mixed to ensure the uniformity of the material and can not be adhered to the inner wall of a machine, and a layer of polysiloxane water-based emulsion demoulding agent is coated inside the sole mould, so that the raw material is well homogenized to ensure that the demoulding can not be adhered when the EVA foaming sole is prepared, the EVA foaming sole can have good appearance performance, and the quality of shoes is improved.

2. According to the invention, through the arrangement that dicumyl peroxide and di-tert-butylperoxyisopropyl benzene are added into the raw materials, the EVA material can obtain a sufficient foaming effect by using a small amount of foaming promoter when the EVA foaming sole raw material is prepared, so that the foaming time is shortened, the production auxiliary agent can be saved, and the production cost is reduced.

3. According to the invention, through the arrangement that the POE raw material and the thermoplastic ethylene propylene rubber are added into the EVA raw material, the EVA raw material can have good wear resistance, the hardness of the sole is improved, meanwhile, when the sole is prepared subsequently, through the arrangement that the silica gel particles in the step S4 are provided with the mutually vertical small holes, when the sole is prepared by fusion in the step S6, the sole sheet can be fully fused with the silica gel particles, the small holes of the silica gel particles are filled with the sole material, the sole is firm, and the sole is ensured to have good friction performance when the sole is worn, so that the sole has excellent performance.

According to the invention, the cooling mechanism is used for cooling the taken-out mold, the mold is taken out from the vulcanizing machine with the temperature of 180-210 ℃, and then is cooled, and the cooled product is further taken out, so that the EVA foamed sole is obtained.

Drawings

FIG. 1 is a schematic structural view of a water supply unit in an apparatus for manufacturing an environmentally friendly EVA foam shoe sole according to an embodiment;

FIG. 2 is a schematic view of a partial structure of a water supply member according to an embodiment;

FIG. 3 is a schematic diagram of an embodiment of a fastening mechanism;

fig. 4 is a partial structural view of a water supply member in an embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

the embodiment of the invention provides an environment-friendly EVA (ethylene vinyl acetate copolymer) foaming sole formula which comprises the following raw materials in parts by mass: 70 parts of EVA (ethylene-vinyl acetate copolymer) raw material, 15 parts of POE (polyolefin elastomer) raw material, 5 parts of thermoplastic ethylene-propylene rubber, 5 parts of polyvinyl cerolate, 2 parts of octene, 8 parts of ethylene, 15 parts of amide group high polymer, 2 parts of dicumyl peroxide, 0.2 part of di-tert-butylperoxyisopropyl benzene, 0.4 part of palmitic acid, 20 parts of silica gel and 5 parts of talcum powder, wherein the POE raw material increases the internal polymerization force of the EVA material, increases the strength of the sole, can improve the strength of the sole, enables the sole to resist impact and improves the bending strength of the sole; the addition of the thermoplastic ethylene propylene rubber and the polyvinyl cerotic acid ester ensures that the EVA foaming sole can be well demoulded when being manufactured, simultaneously, the mechanical strength of the sole can be improved by adding the raw materials, the EVA sole can have a long service life, the polyvinyl cerotic acid ester enables the raw materials to have good mechanical strength when being melted and mixed, the sole can well keep a good original shape when being stressed, the adhesiveness of the raw materials when being melted and mixed can be enhanced by the octene and the ethylene, the raw materials can form an aggregate, the adhesion of the raw materials can be avoided, the demolding performance is good, the high polymer of the amide group, dicumyl peroxide, di-tert-butylperoxyisopropyl benzene and palmitic acid can ensure that the raw materials can be fully cross-linked and mixed when being mixed and melted, the polymer can be fully mixed and prepared, the talcum powder can be combined with the raw materials, and the EVA sole raw materials can have a good foaming effect when being prepared.

The amide group high polymer is polyamide or polyurethane, the polyamide or polyurethane can be flexibly selected, so that the raw material has good mechanical property and demolding property, the particle size of the talcum powder is 300 meshes, the mesh number of the talcum powder can be flexibly selected, good foaming of different soles is guaranteed, and the wanted sole is obtained.

A preparation method of an environment-friendly EVA foaming sole formula comprises the following steps:

s6, fusion preparation, namely putting the hollow silica gel particles obtained in the step S4 into a preheated mold, cutting the raw material pieces obtained in the step S5 into pieces, putting the pieces into the mold, then placing the mold on a flat vulcanizing instrument for foaming, releasing pressure, putting the foamed material pieces into an oven for baking, and then obtaining a finished sole product;

the manufacturing requirements of the sole can be met through the arrangement of the preparation process, the sole can have good use performance, the raw materials are guaranteed to be homogenized and mixed, and the sole is guaranteed to be processed to have good quality and appearance.

The step of preheating the raw materials in the step S1 is as follows: adjusting the internal temperature of a bin of an internal mixer to 100 ℃, preheating an open mill, putting EVA (ethylene-vinyl acetate) raw material and thermoplastic ethylene-propylene rubber into the internal mixer after the internal mixer reaches the temperature, carrying out primary internal mixing, slowly heating to 135 ℃ during internal mixing, wherein the stirring speed of the internal mixing is 30 rpm/min, and the internal mixing time is 5 minutes.

The step of raw material mixing and melting in the step of S2 is as follows:

a. mixing the amide group high polymer, dicumyl peroxide, di-tert-butylperoxyisopropyl benzene, palmitic acid and 75% ethanol, heating to 80 ℃, and completely dissolving dicumyl peroxide to obtain a standby auxiliary agent;

b. and (b) adding the auxiliary agents for later use in the step a into an internal mixer, fully mixing the raw materials in the step S1 with the auxiliary agents for later use, carrying out internal mixing by using the rotating speed of 40rpm/min after mixing, gradually increasing the temperature of a bin of the internal mixer to 160 ℃, keeping internal mixing for 5 minutes after the temperature reaches, slowly reducing the internal mixing temperature of the internal mixer, and stopping when the temperature is reduced to 108 ℃.

The banburying and mixing step in the step S3 is as follows: sequentially adding the POE raw material, polyvinyl cerolate, octene, ethylene and talcum powder into an internal mixer for milling and mixing, and milling at the temperature of 110 ℃ and the rotating speed of 45 rpm/min for 8 minutes to obtain a finished product raw material after the milling is finished.

The step of preparing the silicon rubber particles in the step of S4 is as follows: selecting a finished silica gel raw material, preparing the silica gel raw material into a square or round shape with the particle size of 3 mm, drilling holes in silica gel particles by taking a central point in the silica gel as a center, drilling two holes in each silica gel particle, taking the central point of the silica gel particle as a vertical hole in each hole, and setting mutually vertical small holes in each silica gel particle to obtain the silica gel raw material particles.

The step of opening the raw material sheet in step S5 is: and (3) putting the raw materials in the internal mixer in the S3 into an open mill for opening the zipper pulls, wherein the temperature of the open mill is set at 150 ℃, and the sheet of the open mill zipper pulls has the thickness of 10 mm and the width of 100 mm.

The fusion preparation step in the step S6 comprises the following steps:

selecting a sole mould, coating a layer of polysiloxane water-based emulsion release agent in the sole mould, preheating the mould to 180 ℃, putting the silica gel raw material particles obtained in the step S4 into the sole mould, uniformly distributing the silica gel raw material particles in the mould, distributing 8 silica gel raw material particles in each mould, and shearing the sheets obtained in the step S5 into a piece with an area suitable for the size of the mould;

placing the mold into a vulcanizing machine, performing foaming molding, wherein the temperature of the vulcanizing machine is 180 ℃, the mold pressing is 10 MPa, the molding time is 2 minutes, and then taking out the mold, cooling and taking out the product to obtain the EVA foamed sole;

when the shoe sole is used, the proportions of the raw materials can be flexibly adjusted according to the requirements of the shoe sole, the proportions of different raw materials can enable the shoe sole to have different performances, so that the shoe sole can be suitable for manufacturing different styles of shoe soles, the process flow can also be shortened, and the manufacturing quality of the shoe is improved.

Example two:

the embodiment of the invention provides an environment-friendly EVA (ethylene vinyl acetate copolymer) foaming sole formula which comprises the following raw materials in parts by mass: 85 parts of EVA (ethylene-vinyl acetate) raw material, 25 parts of POE (polyolefin elastomer) raw material, 15 parts of thermoplastic ethylene-propylene rubber, 8 parts of polyvinyl cerolate, 10 parts of octene, 19 parts of ethylene, 26 parts of amide group high polymer, 5 parts of dicumyl peroxide, 0.2 part of di-tert-butylperoxyisopropyl benzene, 2 parts of palmitic acid, 30 parts of silica gel and 13 parts of talcum powder.

The amide group high polymer is polyamide or polyurethane, and the particle size of the talcum powder is 500 meshes.

when the sole is used, the sole which can be prepared according to the formula has the advantages of repeated bending deformation and small deformation, repeated treading deformation and good wear resistance, and the test data are as follows:

according to the above experimental data, in the test, the test conditions are as follows:

the trampling force is 50 kg;

wearing for 30 days is as follows: walking on a cement ground with a friction coefficient of 0.3 for 30 days, 5 hours per day;

the friction force is as follows: the shoe was allowed to stand on a cement floor with a coefficient of friction of 0.3 and the friction generated by pulling the shoe with a tensile gauge.

The step of preheating the raw materials in the step S1 is as follows: adjusting the internal temperature of a bin of an internal mixer to 120 ℃, preheating an open mill, putting EVA (ethylene-vinyl acetate copolymer) raw materials and thermoplastic ethylene-propylene rubber into the internal mixer after the internal mixer reaches the temperature, carrying out primary internal mixing, slowly heating to 150 ℃ during internal mixing, wherein the stirring speed of the internal mixing is 40rpm/min, and the internal mixing time is 10 minutes.

The step of raw material mixing and melting in the step of S2 is as follows:

a. the preparation method comprises the steps of mixing amide group high polymer, dicumyl peroxide, di-tert-butylperoxyisopropyl benzene, palmitic acid and 75% ethanol, heating to 90 ℃, completely dissolving dicumyl peroxide to obtain a standby aid, and adding dicumyl peroxide and di-tert-butylperoxyisopropyl benzene into raw materials, so that when the EVA foaming sole raw material is prepared, the EVA material can be fully foamed by a small amount of foaming promoter, the foaming time is shortened, the production aid can be saved, and the production cost is reduced;

b. and (b) adding the auxiliary agents for later use in the step a into an internal mixer, fully mixing the raw materials and the auxiliary agents for later use in the step S1, carrying out internal mixing at a rotating speed of 50rpm/min after mixing, gradually increasing the temperature of a bin of the internal mixer to 175 ℃, keeping internal mixing for 7 minutes after the temperature reaches, continuing internal mixing for 6 minutes, then slowly reducing the internal mixing temperature of the internal mixer, and stopping when the temperature is reduced to 110 ℃.

The banburying and mixing step in the step S3 is as follows: sequentially adding the POE raw material, polyvinyl cerolate, octene, ethylene and talcum powder into an internal mixer for milling and mixing, and milling at the temperature of 125 ℃ and the rotating speed of 65rpm/min for 15 minutes to obtain a finished product raw material after the milling is finished.

The step of preparing the silicon rubber particles in the step of S4 is as follows: selecting a finished silica gel raw material, preparing the silica gel raw material into a square or round shape with the particle size of 5 mm, drilling holes in silica gel particles by taking a central point in the silica gel as a center, drilling two holes in each silica gel particle, taking the central point of the silica gel particle as a vertical hole in each hole, and setting mutually vertical small holes in each silica gel particle to obtain the silica gel raw material particles.

The step of opening the raw material sheet in step S5 is: and (3) putting the raw materials in the internal mixer in the S3 into an open mill for opening the zipper pulls, wherein the temperature of the open mill is 190 ℃, and the sheet of the open mill zipper pulls has the thickness of 50 mm and the width of 200 mm.

The fusion preparation step in the step S6 comprises the following steps:

selecting a sole mould, coating a layer of polysiloxane water-based emulsion release agent in the sole mould, preheating the mould to 210 ℃, putting the silica gel raw material particles in the step S4 into the sole mould to be uniformly distributed in the mould, distributing 10 silica gel raw material particles in each mould, shearing the sheet in the step S5 into a piece with an area suitable for the size of the mould, putting the cut sheet into the EVA raw material, adding the POE raw material and the thermoplastic ethylene propylene rubber into the EVA raw material to ensure that the EVA raw material has good wear resistance and improve the hardness of the sole, meanwhile, when subsequently preparing the sole, arranging mutually vertical small holes in each silica gel particle of the silica gel particles in the step S4, when preparing the sole by fusing in the step S6, fully combining the sole sheet with the silica gel particles, filling the sole material into the small holes of the silica gel particles, the sole is firm, and has good friction performance when the sole is worn, so that the sole has excellent performance;

and (3) placing the mold into a vulcanizing machine, then carrying out foaming molding, wherein the temperature of the vulcanizing machine is 210 ℃, the mold pressing is 20 MPa, the molding time is 8 minutes, then taking out the mold, cooling, and taking out the product to obtain the EVA foamed sole. Preferably, the mold taken out is cooled by a cooling mechanism.

It should be noted that, in order to better realize the cooling of the mold, the invention further provides a device for preparing the environmentally-friendly EVA foamed shoe sole, which comprises a preparation mechanism for executing the preparation method in each embodiment and a cooling mechanism, wherein the cooling mechanism is installed in the preparation mechanism, and the cooling mechanism is used for cooling the mold. That is, the structure of the preparation mechanism is not limited in particular to the specific embodiments, and any mechanism capable of executing and implementing the preparation method in each of the above embodiments may be used, and the mechanism is also referred to as the preparation mechanism. And cooling body adopts the water-cooling mode to cool down, considers the problem of installation convenience and cost, and this cooling body includes cooling part and water supply spare, and cooling part and water supply spare are installed respectively in preparing the mechanism. The cooling piece is used for cooling the mold which is taken out of the vulcanizing machine and then put into the vulcanizing machine in a wrapping or winding mode. The water supply part is connected with external cold water and supplies the cold water to the cooling part, and the flowing cold water in the cooling part continuously drives heat conducted from the die, so that the effect of cooling the die is achieved. It can be understood that the water supply device can also be used as a device for supplying water for enterprise production and integrated into the whole production process, so that the resources can be used repeatedly and effectively.

The water supply part comprises a vertical water pump, a water inlet pipe, a first connecting pipe, a clamping mechanism, a water inlet main pipe, a water outlet pipe, a second connecting pipe, a water outlet main pipe, a fixed seat, a clamping ring and a filter cylinder; the bottom of the vertical water pump is fixedly connected with the fixed seat, the two sides of the vertical water pump are respectively communicated with a water inlet pipe and a water outlet pipe, the side surface of the water inlet pipe is communicated with a first connecting pipe communicated with a water inlet main pipe, a clamping and fixing mechanism is arranged between the water inlet pipe and the first connecting pipe, the inner side of the clamping and fixing mechanism is movably clamped with a clamping ring on the side surface of the first connecting pipe, and the side surface of the water outlet pipe is communicated with a second connecting pipe communicated with a water outlet main pipe; the clamping mechanism comprises an arc plate, a clamping groove, a sealing ring, a mounting plate, an adjusting screw rod, a connecting ring, a rotating handle and a reset spring, the arc plate is movably clamped with the side face of a first connecting pipe through a water inlet pipe, the inner side of the clamping groove formed in the side face of the arc plate is movably clamped with the clamping ring, the inner side of the arc plate is fixedly connected with the sealing ring, the side face of the mounting plate welded to the side face of the arc plate is connected with the adjusting screw rod through threads, the side face of the top end of the adjusting screw rod is connected with the rotating handle through threads, and the bottom end of the adjusting screw rod is fixedly connected with the connecting ring. And a return spring positioned above the mounting plate is arranged on the outer side of the adjusting screw rod. The connecting structures at the two ends of the water inlet main pipe and the water outlet main pipe are in flange connection. The sealing ring is of a semicircular structure. The filter cartridge is disposed inside the first connection pipe. One end of the water outlet main pipe is connected with the cooling piece.

Above-mentioned water supply spare, one end through water main is connected with the cooling part, and the water supply spare provides mobile cold water to the cooling part, and the inside mobile cold water of cooling part constantly drives the heat of following the mould conduction to reach the effect of mould cooling. Meanwhile, a clamping mechanism is arranged between the water inlet pipe and the first connecting pipe on the side surface of the vertical water pump, the inner side of an arc-shaped plate in the clamping mechanism is movably clamped with the side surfaces of the water inlet pipe and the first connecting pipe, a clamping groove formed in the side surface of the arc-shaped plate is movably clamped with a clamping ring arranged on the side surfaces of the water inlet pipe and the first connecting pipe, so that the water inlet pipe and the first connecting pipe are preliminarily installed, the side surface of a mounting plate welded on the side surface of the arc-shaped plate is in threaded connection with an adjusting screw rod, a reset spring is arranged at the bottom of a rotating handle in threaded connection with the side surface of the adjusting screw rod, the connecting ring is welded at the bottom end of the adjusting screw rod, the rotating handle is rotated, the connecting pipe at the bottom end of the adjusting screw rod extrudes the water inlet pipe and the first connecting pipe, so that the positions of the water inlet pipe and the first connecting pipe are fixed, meanwhile, the connecting pipe is convenient to be disassembled and maintained, and a filter cartridge is arranged on the inner side of the first connecting pipe at the bottom of the water inlet main pipe, so that the filter cartridge can filter magazines in water, the water supply quality is improved, the water inlet main pipe and the water outlet main pipe are both horizontally arranged, and the whole space arrangement is reasonable. Meanwhile, the two groups of vertical water pumps can be stably arranged on the machine body by fixedly connecting the bottoms of the vertical water pumps with the fixed seat.

As shown in fig. 1, the water supply unit includes a vertical water pump 100, a water inlet pipe 200, a first connection pipe 300, a fastening mechanism 400, a water inlet header pipe 500, a water outlet pipe 600, a second connection pipe 700, a water outlet header pipe 800, a fixing seat 900, a snap ring 1000, and a filter cartridge 1100; the bottom of the vertical water pump 100 is fixedly connected with the fixing seat 900, two sides of the vertical water pump 100 are respectively communicated with the water inlet pipe 200 and the water outlet pipe 600, the side surface of the water inlet pipe 200 is communicated with the first connecting pipe 300 communicated with the water inlet main pipe 500, a clamping and fixing mechanism 400 is arranged between the water inlet pipe 200 and the first connecting pipe 300, the clamping ring 1000 is welded on the side surface of the connecting pipe 300, the clamping and fixing mechanism 400 is clamped on the clamping ring 1000, the side surface of the water outlet pipe 600 is communicated with the second connecting pipe 700 communicated with the water outlet main pipe 800, and the inner side of the first connecting pipe 300 is provided with the filter cartridge 1100.

A section of thick bamboo 1100 is strained in the inboard installation of the first connecting pipe 300 of intake manifold 500 bottom, and it can filter aquatic impurity to strain a section of thick bamboo 1100, improves water supply quality, and the connection structure at intake manifold 500 and the delivery manifold 800's both ends is flange joint, and intake manifold 500 and delivery manifold 800 are horizontal arrangement, and whole spatial arrangement is reasonable.

The clamping mechanism 400 comprises an arc plate 410, a clamping groove 420, a sealing ring 430, a mounting plate 440, an adjusting screw 450, a connecting ring 460, a rotating handle 470 and a return spring 480, wherein the arc plate 410 is movably clamped with the side surfaces of the water inlet pipe 200 and the first connecting pipe 300 respectively, the inner side of the clamping groove 420 formed in the side surface of the arc plate 410 is movably clamped with the clamping ring 1000, and the return spring 480 positioned above the mounting plate 440 is arranged on the outer side of the adjusting screw 450.

The inner side of the arc plate 410 in the clamping mechanism 400 is movably clamped with the side surfaces of the water inlet pipe 200 and the first connecting pipe 300 respectively, and the clamping groove 420 formed in the side surface of the arc plate 410 is movably clamped with the clamping ring 1000 formed in the side surfaces of the water inlet pipe 200 and the first connecting pipe 300, so that the water inlet pipe 200 and the first connecting pipe 300 are preliminarily installed.

The inner side of the arc plate 410 is fixedly connected with the sealing ring 430, the side surface of the mounting plate 440 welded on the side surface of the arc plate 410 is in threaded connection with the adjusting screw 450, the side surface of the top end of the adjusting screw 450 is in threaded connection with the rotating handle 470, and the bottom end of the adjusting screw 450 is fixedly connected with the connecting ring 460.

From the above structure, it can be known that the rotating handle 470 is rotated to adjust the connection ring 460 at the bottom end of the screw rod 450, so that the arc plate 410 and the connection ring 460 together extrude the water inlet pipe 200 and the first connection pipe 300, thereby fixing the positions of the water inlet pipe 200 and the first connection pipe 300, and simultaneously facilitating the disassembly and maintenance thereof.

The sealing ring 430 is a semicircular structure, and the sealing ring 430 is made of rubber, so that leakage between the water inlet pipe 200 and the first connecting pipe 300 can be avoided.

The working principle of the above-mentioned water supply part is as follows, firstly, a clamping mechanism 400 is arranged between the water inlet pipe 200 and the first connecting pipe 300 on the side of the vertical water pump 100, the inner side of the arc plate 410 in the clamping mechanism 400 is movably clamped with the side of the water inlet pipe 200 and the first connecting pipe 300, and the clamping groove 420 arranged on the side of the arc plate 410 is movably clamped with the clamping ring 1000 arranged on the side of the water inlet pipe 200 and the first connecting pipe 300, so that the water inlet pipe 200 and the first connecting pipe 300 are primarily installed, the side of the installation plate 440 welded on the side of the arc plate 410 is in threaded connection with the adjusting screw 450, the bottom of the rotating handle 470 in threaded connection with the side of the adjusting screw 450 is provided with the return spring 480, the bottom end of the adjusting screw 450 is welded with the connecting ring 460, the rotating handle 470 is rotated, the connecting pipe at the bottom end of the adjusting screw 450 extrudes the water inlet pipe 200 and the first connecting pipe 300, thereby fixing the positions of the water inlet pipe 200 and the first connecting pipe 300, and facilitating the disassembly and maintenance thereof, and the filter cartridge 1100 is arranged at the inner side of the first connecting pipe 300 at the bottom of the water inlet main pipe 500, the filter cartridge 1100 can filter out impurities in water, the water supply quality is improved, the water inlet main pipe 500 and the water outlet main pipe 800 are horizontally arranged, and the whole space arrangement is reasonable.

According to the preparation device, the mold is taken out from the vulcanizing machine with the temperature of 180-210 ℃ through the cooling mechanism arranged in the preparation mechanism and then cooled, and the cooled product is taken out, so that the EVA foamed sole is obtained.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An environment-friendly EVA foamed sole formula is characterized in that: the composite material comprises the following raw materials in parts by mass: 70-85 parts of EVA (ethylene vinyl acetate), 15-25 parts of POE (polyolefin elastomer), 5-15 parts of thermoplastic ethylene propylene rubber, 5-8 parts of polyvinyl cerolate, 2-10 parts of octene, 8-19 parts of ethylene, 15-26 parts of amide group high polymer, 2-5 parts of dicumyl peroxide, 0.2-0.8 part of di-tert-butylperoxyisopropyl benzene, 0.4-2 parts of palmitic acid, 20-30 parts of silica gel and 5-13 parts of talcum powder.

2. The environmentally friendly EVA foam shoe sole formulation of claim 1, wherein: the amide group high polymer is polyamide or polyurethane, and the particle size of the talcum powder is 300-500 meshes.

3. The preparation method of the environment-friendly EVA foaming sole formula according to claim 1, characterized by comprising the following steps: the method comprises the following steps:

4. The preparation method of the environment-friendly EVA foaming sole formula according to claim 3, characterized by comprising the following steps: the step of preheating the raw materials in the step S1 is as follows: adjusting the internal temperature of a bin of an internal mixer to 120 ℃ below zero, preheating an open mill, putting EVA raw materials and thermoplastic ethylene propylene rubber into the internal mixer for primary internal mixing after the internal temperature is reached, slowly heating to 150 ℃ below zero during the internal mixing, wherein the stirring speed of the internal mixing is 30-40rpm/min, and the internal mixing time is 5-10 minutes.

5. The preparation method of the environment-friendly EVA foaming sole formula according to claim 3, characterized by comprising the following steps: the step of mixing and melting the raw materials in the step S2 is as follows:

b. and (b) adding the auxiliary agent for later use in the step a into an internal mixer, fully mixing the raw materials in the step S1 with the auxiliary agent for later use, carrying out internal mixing by using the rotating speed of 40-50rpm/min after mixing, gradually increasing the temperature of a bin of the internal mixer to 175 ℃ and keeping the temperature rise time for 5-7 minutes, continuing the internal mixing for 5-6 minutes after the temperature is reached, and then slowly reducing the internal mixing temperature of the internal mixer to 110 ℃ and stopping when the temperature is reduced to 108 ℃ and 110 ℃.

6. The preparation method of the environment-friendly EVA foaming sole formula according to claim 3, characterized by comprising the following steps: the banburying and mixing step in the step S3 is as follows: sequentially putting the POE raw material, polyvinyl cerotic acid ester, octene, ethylene and talcum powder into an internal mixer for milling and mixing, and obtaining the finished product raw material after the milling and mixing are finished, wherein the temperature is 110-125 ℃ and the rotating speed is 45-65rpm/min, and the milling time is 8-15 minutes.

7. The preparation method of the environment-friendly EVA foaming sole formula according to claim 3, characterized by comprising the following steps: the step of preparing the silicon rubber particles in the step S4 is as follows: selecting a finished silica gel raw material, preparing the silica gel raw material into a square or round shape with the particle size of 3-5 mm, drilling holes in silica gel particles by taking a central point in the silica gel as a center, drilling two holes in each silica gel particle, taking the central point of each silica gel particle as a vertical hole in each hole, and arranging the small holes which are vertical to each other in each silica gel particle to obtain the silica gel raw material particles.

8. The preparation method of the environment-friendly EVA foaming sole formula according to claim 3, characterized by comprising the following steps: the step of refining the raw material sheet in the step S5 is: and (3) putting the raw materials in the internal mixer in the S3 into an open mill for opening the pull tab, wherein the temperature of the open mill is set at 190 ℃, the thickness of the sheet of the open mill pull tab is 10-50 mm, and the width of the sheet is 100-200 mm.

9. The preparation method of the environment-friendly EVA foaming sole formula according to claim 3, characterized by comprising the following steps: the step of S6 fusion preparation comprises the following steps:

10. The preparation method of the environment-friendly EVA foaming sole formula according to claim 9, characterized by comprising the following steps: in step S6, the mold taken out is cooled by a cooling mechanism.