CN104369302A - Molding technology of double-color EVA foaming shoe sole - Google Patents
Molding technology of double-color EVA foaming shoe sole Download PDFInfo
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- CN104369302A CN104369302A CN201410569169.9A CN201410569169A CN104369302A CN 104369302 A CN104369302 A CN 104369302A CN 201410569169 A CN201410569169 A CN 201410569169A CN 104369302 A CN104369302 A CN 104369302A
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Abstract
The invention discloses a molding technology of a double-color EVA foaming shoe sole. The molding technology comprises the following steps: a, manufacturing a first foaming mold according to the particular shape and size of a target shoe; b, putting the first foaming mold on a TPR molding machine, then injecting a first hue EVA foaming material into a first molding space, carrying out cooling molding, and then opening the mold so as to obtain a first hue EVA pre-foaming shoe sole blank; c, injecting a second hue EVA foaming material into a second molding space, forming a second hue EVA pre-foaming shoe sole blank which covers the first hue EVA pre-foaming shoe sole blank, carrying out cooling molding, and then opening the mold so as to obtain two EVA pre-foaming shoe sole blanks with different hues; and d, carrying out foaming molding on the EVA pre-foaming shoe sole blanks, and opening the mold and taking materials after molding so as to obtain the double-color EVA foaming shoe sole. According to the invention, the double-color EVA foaming shoe sole is obtained based on the existing machine, so that not only is the cost of production equipment lowered, but also the utilization efficiency of the existing equipment can be improved.
Description
Technical field
The present invention relates to a kind of moulding process of EVA foamed shoe sole, refer in particular to a kind of moulding process of double-colored EVA foamed shoe sole.
Background technology
In recent years, along with the development of China, the people not merely be only pursue quality, but also pursue the problems such as attractive in appearance, though with existing technology or inadequate can meet the people to quality and the requirement united two into one attractive in appearance, but produce this link have to, in order to many aesthetics, cost is many more than more than one times.In order to improve the aesthetic of sole, a lot of Xie Cai producer all releases the sole with two kinds of different tones.For now, the sole of two kinds of different tones on the market mainly contains double-colored TPR sole and double-colored EVA foamed shoe sole.
TPR is the english abbreviation of thermoplastic elastomer, is a kind of material having rubber and thermoplastic characteristic concurrently.TPR has high resiliency, high strength and high resilience feature, and having again can the feature of injection molding, is thus widely used in material for sole of shoe and prepares forming field.
For now, TPR dual molding process is all utilize TPR material to adopt two forming benchs usually, first at First forming machine ejection formation first hue sector, after cycle die sinking, at second shaping lifting ejection formation second hue sector.
Chinese utility model patent (application number: 201120462610.5, notification number: 202318896U) disclose a kind of TPR twin-color air-blow shoe mould, it is primarily of patrix, counterdie is formed, one end of patrix and one end of counterdie are connected through the hinge, the side of counterdie is connected with middle mould by hinge, the other end gag lever post of patrix, gag lever post and patrix form a catching groove, the other end of counterdie is provided with protuberance, described protuberance matches with catching groove, owing to being provided with above structure, above-mentioned TPR twin-color air-blow shoe mould has easy to operate, production efficiency is high, product property advantages of higher.
EVA resin is ethylene-vinyl acetate copolymer, and general vinyl acetate (VA) content is 5% ~ 40%.Compared with polyethylene, EVA owing to introducing VAM in strand, thus reduce high-crystallinity, improve pliability, impact resistance, filler intermiscibility and heat seal performance, be widely used in the fields such as foaming shoe material, functional greenhouse film, packaging film, PUR, electric wire and toy.In general, the performance of EVA resin depends primarily on the content of vinyl acetate on strand.The topmost application of Xie Caishi China EVA resin.In the EVA resin that footwear material uses, vinyl acetate content is generally 15% ~ 22%.Because the blended foaming product of EVA resin has the performances such as softness, good springiness, resistance to chemical attack, be therefore widely used in medium-to-high grade sneakers, climbing boot, slippers, the sole of sandals and interior material.
The selection of current sole is upper EVA material or TPR material substantially, and due to the comparatively light and better softness of EVA material quality, thus most sport footwear is all selected at the bottom of EVA shoe.Although TPR material is heavier material and flexibility is general, the anti-wear performance of TPR material by force and not yielding, is thus usually used in leather shoes and Sports shoes of children.
Due to the technique adopting EVA material and TPR material to prepare sole, thus also difference is larger for its mould adopted, existing Chinese invention patent application (the application number: 201110281544.6 needing to prepare mould at the bottom of double-color EVA shoes and board and submit in 2011-09-20 as the applicant, publication number: CN 102335992A) described in a kind of mould manufactured at the bottom of double-color EVA shoes, it comprises patrix, counterdie, on every colour table, under every colour table, the centre of upper die and lower die is provided with die cavity, on match with patrix every colour table, under match with counterdie every colour table, upper die and lower die are equipped with the passage of injection EVA material to die cavity.EVA material foaming quality can be improved with mold and shorten EVA material just foamed time, improve the workmanship at the bottom of EVA shoe and production efficiency, but also have the following disadvantages in the applying of reality: this mould and corresponding board all need specialty customization, and equipment cost is high, thus cause the price of the double-colored EVA foamed shoe sole made higher, in addition, current middle-size and small-size Xie Cai manufacturer has much possessed the board of double-colored TPR sole and the board of common EVA foamed shoe sole, if need double-colored EVA foamed shoe sole, the special board that certainly will will again purchase at the bottom of a double-color EVA shoes, because this special board high cost, thus domestic a lot of middle-size and small-size Xie Cai manufacturer can cannot purchase through want of funds, or it is not high to feel to purchase rear cost performance, board is caused to leave unused and waste.
Summary of the invention
The invention provides a kind of moulding process of double-colored EVA foamed shoe sole, its main purpose is to overcome in prior art the board high cost of preparing double-colored EVA foamed shoe sole and is unfavorable for the defect that middle-size and small-size Xie Cai producer purchases.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of moulding process of double-colored EVA foamed shoe sole, comprise the following steps: a, according to target footwear material concrete shape and size, in conjunction with the foaming parameter selecting EVA foam shoe material, produce the first foaming mould, this first foaming mould comprises mould and a counterdie in a patrix, described upper die and lower die are formed with first molding space injected for the first tone EVA expanded material, and described middle mould and counterdie form second molding space injected for the second tone EVA expanded material; B, the first foaming mould is inserted on TPR forming bench, afterwards the EVA expanded material of the first tone is injected the first molding space, to be cooled shaping after open patrix, the first tone EVA prefoam sole embryo can be obtained; C, middle mould and counterdie to be covered, the EVA expanded material of the second tone is injected in the second molding space, and form the second tone EVA prefoam sole embryo be covered on the first tone EVA prefoam sole embryo, to be cooled shaping after open middle mould, the EVA prefoam sole embryo with two kinds of different tones can be obtained; D, being inserted in common EVA foaming mould by the EVA prefoam sole embryo that step c obtains and carry out foaming on common EVA foams board, shaping rear die sinking feeding can obtain double-colored EVA foamed shoe sole.
Further, one end of described patrix and the upside of counterdie or downside are connected through the hinge, described patrix is provided with four circle hole grooves, the left side of described counterdie or right side are connected with middle mould by hinge, described middle mould is provided with four circle hole grooves, and corresponding four columns on counterdie of described circle hole groove coordinate.
Further, the EVA prefoam sole embryo of described two kinds of different tones and the volume ratio of described double-colored EVA foamed shoe sole are 1/2 ~ 3/4.
Further, the EVA prefoam sole embryo of described two kinds of different tones and the volume ratio of described double-colored EVA foamed shoe sole are 2/3.
Further, in steps d, described foaming comprises the following steps: after the die cap of the common EVA foaming mould that closes, by secondary mould pressing forming bench pressurized, heated at least 200 seconds, pressurization cooling at least 250 seconds, takes out finished product afterwards, can obtain double-colored EVA foamed shoe sole again.
Further, described in step b, the first tone EVA expanded material comprises EVA raw material, rubber raw material, processing aid, bridging agent, blowing agent, activating agent and the first colorant, the melting inject the first molding space in the mode of injection moulding after fully mixing of this first tone EVA expanded material.
Further, described patrix comprises blowing expects hole and a gas hole, described first tone EVA expanded material heats through injection machine with fusion plastification, first tone EVA expanded material of the molten state after heating is injected in the first molding space from the material hole of blowing of patrix, by blow moulding machine or blowning installation, gas hole is inflated again, the air-flow that first tone EVA expanded material is blown out by gas hole flows in the first molding space, final blow molding is shaping, to be cooled shaping after open patrix, the first tone EVA prefoam sole embryo can be obtained.
Further, described in step c, the second tone EVA expanded material comprises EVA raw material, rubber raw material, processing aid, bridging agent, blowing agent, activating agent and the second colorant, the melting inject the second molding space in the mode of injection moulding after fully mixing of this second tone EVA expanded material.
Further, described middle mould comprises blowing expects hole and a gas hole, described second tone EVA expanded material heats through injection machine with fusion plastification, the material hole of blowing of the second tone EVA expanded material of the molten state after heating therefrom mould is injected in the second molding space, by blow moulding machine or blowning installation, gas hole is inflated again, the air-flow that second tone EVA expanded material is blown out by gas hole flows in the second molding space, final blow molding is shaping, to be cooled shaping after open middle mould, the EVA prefoam sole embryo with two kinds of different tones can be obtained.
Compared to the prior art, the beneficial effect that the present invention produces is:
1, structure of the present invention is simple, practical, by using for reference the double-colored TPR sole of existing manufacture and manufacturing the technique of normal monochrome EVA foaming, existing double-colored TPR sole and the normal monochrome EVA of realizing is utilized to foam board, design the first foaming mould meeting double-colored EVA foamed shoe sole, thus first to make the EVA prefoam sole embryo with two kinds of different tones, after carry out the process route that foams, obtained double-colored EVA foamed shoe sole, because generally there is infrastructure device in current middle-size and small-size Xie Cai manufacturer as monochromatic EVA injection machine, double-colored TPR injection machine, and we will carry out dual-color forming to EVA, then can use existing board completely, and without the need to going exploitation and customizing special board, greatly will reduce the cost of production equipment like this, and the utilization ratio of existing equipment can be improved widely, of the present invention proposition breaks through technique in the past, not only can bring very large economic benefit, and the innovation of energy actualizing technology.
2, the present invention is in the manufacturing process of sole, adopt pressurize the again technique of cooling and shaping of the first pressurized, heated of EVA secondary mould pressing forming bench that the first tone EVA prefoam sole embryo and the second tone EVA prefoam sole embryo can be made to bond tightr, shaping better effects if, so just can reach and also have quality also can be guaranteed on basis attractive in appearance.
3, in the present invention, the winter resistance of prepared double-colored EVA foamed shoe sole is better, and what can effectively prevent cold weather from bringing be stiff, and the more soft also more lightweight of its quality, wear more comfortable, can greatly save material and cost of labor, and improve output and profit simultaneously.
Accompanying drawing explanation
Without accompanying drawing.
Detailed description of the invention
The invention discloses a kind of moulding process of double-colored EVA foamed shoe sole, those skilled in the art can use for reference present disclosure, and suitable improving technique parameter realizes.Special needs to be pointed out is, all similar replacements and change apparent to those skilled in the art, they are all deemed to be included in the present invention.Method of the present invention and application are described by preferred embodiment, related personnel obviously can not depart from content of the present invention, spirit and scope methods and applications as herein described are changed or suitably change with combination, realize and apply the technology of the present invention.
A moulding process for double-colored EVA foamed shoe sole, comprises the following steps:
The first step: according to target footwear material concrete shape and size, in conjunction with the foaming parameter selecting EVA foam shoe material, produce the first foaming mould, this first foaming mould comprises mould and a counterdie in a patrix, described upper die and lower die are formed with first molding space injected for the first tone EVA expanded material, and described middle mould and counterdie form second molding space injected for the second tone EVA expanded material.In this step, one end of described patrix and the upside of counterdie or downside are connected through the hinge, described patrix is provided with four circle hole grooves, the left side of described counterdie or right side are connected with middle mould by hinge, described middle mould is provided with four circle hole grooves, and corresponding four columns on counterdie of described circle hole groove coordinate.
Second step: inserted by the first foaming mould on TPR forming bench, injects the first molding space by the EVA expanded material of the first tone afterwards, to be cooled shaping after open patrix, the first tone EVA prefoam sole embryo can be obtained.Described in this step, the first tone EVA expanded material comprises EVA raw material, rubber raw material, processing aid, bridging agent, blowing agent, activating agent and the first colorant, the melting inject the first molding space in the mode of injection moulding after fully mixing of this first tone EVA expanded material.Described patrix comprises blowing expects hole and a gas hole, described first tone EVA expanded material heats through injection machine with fusion plastification, first tone EVA expanded material of the molten state after heating is injected in the first molding space from the material hole of blowing of patrix, by blow moulding machine or blowning installation, gas hole is inflated again, the air-flow that first tone EVA expanded material is blown out by gas hole flows in the first molding space, final blow molding is shaping, to be cooled shaping after open patrix, the first tone EVA prefoam sole embryo can be obtained.
3rd step: middle mould and counterdie are covered, the EVA expanded material of the second tone is injected in the second molding space, and form the second tone EVA prefoam sole embryo be covered on the first tone EVA prefoam sole embryo, to be cooled shaping after open middle mould, the EVA prefoam sole embryo with two kinds of different tones can be obtained.Described in this step, the second tone EVA expanded material comprises EVA raw material, rubber raw material, processing aid, bridging agent, blowing agent, activating agent and the second colorant, the melting inject the second molding space in the mode of injection moulding after fully mixing of this second tone EVA expanded material.Described middle mould comprises blowing expects hole and a gas hole, described second tone EVA expanded material heats through injection machine with fusion plastification, the material hole of blowing of the second tone EVA expanded material of the molten state after heating therefrom mould is injected in the second molding space, by blow moulding machine or blowning installation, gas hole is inflated again, the air-flow that second tone EVA expanded material is blown out by gas hole flows in the second molding space, final blow molding is shaping, to be cooled shaping after open middle mould, the EVA prefoam sole embryo with two kinds of different tones can be obtained.
4th step: being inserted in common EVA foaming mould by the EVA prefoam sole embryo that step c obtains and carry out foaming on common EVA foams board, shaping rear die sinking feeding can obtain double-colored EVA foamed shoe sole.Described in this step, foaming comprises the following steps: after the die cap of the common EVA foaming mould that closes, by secondary mould pressing forming bench pressurized, heated 200 seconds, then cooling 250 seconds of pressurizeing, take out finished product afterwards, double-colored EVA foamed shoe sole can be obtained.Adopt pressurize the again technique of cooling and shaping of the first pressurized, heated of EVA secondary mould pressing forming bench that the first tone EVA prefoam sole embryo and the second tone EVA prefoam sole embryo can be made to bond tightr, shaping better effects if, so just can reach and also have quality also can be guaranteed on basis attractive in appearance.
The EVA prefoam sole embryo of the above two kinds of different tone and the volume ratio of described double-colored EVA foamed shoe sole are 1/2 ~ 3/4.Preferably, the EVA prefoam sole embryo of described two kinds of different tones and the volume ratio of described double-colored EVA foamed shoe sole are 2/3.
The present embodiment structure is simple, practical, by using for reference the double-colored TPR sole of existing manufacture and manufacturing the technique of normal monochrome EVA foaming, existing double-colored TPR sole and the normal monochrome EVA of realizing is utilized to foam board, design the first foaming mould meeting double-colored EVA foamed shoe sole, thus first to make the EVA prefoam sole embryo with two kinds of different tones, after carry out the process route that foams, obtained double-colored EVA foamed shoe sole, because generally there is infrastructure device in current middle-size and small-size Xie Cai manufacturer as monochromatic EVA injection machine, double-colored TPR injection machine, and we will carry out dual-color forming to EVA, then can use existing board completely, and without the need to going exploitation and customizing special board, greatly will reduce the cost of production equipment like this, and the utilization ratio of existing equipment can be improved widely, of the present invention proposition breaks through technique in the past, not only can bring very large economic benefit, and the innovation of energy actualizing technology.
In addition, the winter resistance of the double-colored EVA foamed shoe sole prepared by the present embodiment is better, and what can effectively prevent cold weather from bringing be stiff, and the more soft also more lightweight of its quality, wear more comfortable, can greatly save material and cost of labor, and improve output and profit simultaneously.
Above are only the specific embodiment of the present invention, but design concept of the present invention is not limited thereto, all changes utilizing this design the present invention to be carried out to unsubstantiality, all should belong to the behavior of invading scope.
Claims (9)
1. the moulding process of a double-colored EVA foamed shoe sole, it is characterized in that, comprise the following steps: a, according to target footwear material concrete shape and size, in conjunction with the foaming parameter selecting EVA foam shoe material, produce the first foaming mould, this first foaming mould comprises mould and a counterdie in a patrix, described upper die and lower die are formed with first molding space injected for the first tone EVA expanded material, and described middle mould and counterdie form second molding space injected for the second tone EVA expanded material; B, the first foaming mould is inserted on TPR forming bench, afterwards the first tone EVA expanded material is injected the first molding space, to be cooled shaping after open patrix, the first tone EVA prefoam sole embryo can be obtained; C, middle mould and counterdie to be covered, the second tone EVA expanded material is injected in the second molding space, and form the second tone EVA prefoam sole embryo be covered on the first tone EVA prefoam sole embryo, to be cooled shaping after open middle mould, the EVA prefoam sole embryo with two kinds of different tones can be obtained; D, being inserted in common EVA foaming mould by the EVA prefoam sole embryo that step c obtains and carry out foaming on common EVA foams board, shaping rear die sinking feeding can obtain double-colored EVA foamed shoe sole.
2. the moulding process of a kind of double-colored EVA foamed shoe sole as claimed in claim 1, it is characterized in that: one end of described patrix and the upside of counterdie or downside are connected through the hinge, described patrix is provided with four circle hole grooves, the left side of described counterdie or right side are connected with middle mould by hinge, described middle mould is provided with four circle hole grooves, and corresponding four columns on counterdie of described circle hole groove coordinate.
3. the moulding process of a kind of double-colored EVA foamed shoe sole as claimed in claim 2, is characterized in that: the EVA prefoam sole embryo of described two kinds of different tones and the volume ratio of described double-colored EVA foamed shoe sole are 1/2 ~ 3/4.
4. the moulding process of a kind of double-colored EVA foamed shoe sole as claimed in claim 3, is characterized in that: the EVA prefoam sole embryo of described two kinds of different tones and the volume ratio of described double-colored EVA foamed shoe sole are 2/3.
5. the moulding process of a kind of double-colored EVA foamed shoe sole as claimed in claim 1, it is characterized in that, in steps d, described foaming comprises the following steps: after the die cap of the common EVA foaming mould that closes, by secondary mould pressing forming bench pressurized, heated at least 200 seconds, pressurization cooling at least 250 seconds, takes out finished product afterwards, can obtain double-colored EVA foamed shoe sole again.
6. the moulding process of a kind of double-colored EVA foamed shoe sole as claimed in claim 1, it is characterized in that: described in step b, the first tone EVA expanded material comprises EVA raw material, rubber raw material, processing aid, bridging agent, blowing agent, activating agent and the first colorant, the melting inject the first molding space in the mode of injection moulding after fully mixing of this first tone EVA expanded material.
7. the moulding process of a kind of double-colored EVA foamed shoe sole stated as claim 6, it is characterized in that: described patrix comprises blowing expects hole and a gas hole, described first tone EVA expanded material heats through injection machine with fusion plastification, first tone EVA expanded material of the molten state after heating is injected in the first molding space from the material hole of blowing of patrix, by blow moulding machine or blowning installation, gas hole is inflated again, the air-flow that first tone EVA expanded material is blown out by gas hole flows in the first molding space, final blow molding is shaping, to be cooled shaping after open patrix, the first tone EVA prefoam sole embryo can be obtained.
8. the moulding process of a kind of double-colored EVA foamed shoe sole stated as claim 7, it is characterized in that: described in step c, the second tone EVA expanded material comprises EVA raw material, rubber raw material, processing aid, bridging agent, blowing agent, activating agent and the second colorant, the melting inject the second molding space in the mode of injection moulding after fully mixing of this second tone EVA expanded material.
9. the moulding process of a kind of double-colored EVA foamed shoe sole stated as claim 8, it is characterized in that: described middle mould comprises blowing expects hole and a gas hole, described second tone EVA expanded material heats through injection machine with fusion plastification, the material hole of blowing of the second tone EVA expanded material of the molten state after heating therefrom mould is injected in the second molding space, by blow moulding machine or blowning installation, gas hole is inflated again, the air-flow that second tone EVA expanded material is blown out by gas hole flows in the second molding space, final blow molding is shaping, to be cooled shaping after open middle mould, the EVA prefoam sole embryo with two kinds of different tones can be obtained.
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| CN201410569169.9A CN104369302B (en) | 2014-10-23 | 2014-10-23 | Molding technology of double-color EVA foaming shoe sole |
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| CN201410569169.9A CN104369302B (en) | 2014-10-23 | 2014-10-23 | Molding technology of double-color EVA foaming shoe sole |
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| CN105729848A (en) * | 2016-04-18 | 2016-07-06 | 斯凯奇鞋业（东莞）有限公司 | Method for producing double-color and double-hardness sole through single-color injection machine table by using middle plate to separate colors |
| CN106182589A (en) * | 2016-08-26 | 2016-12-07 | 欧荣 | One-body molded zone face and the polychrome mould of sole surrounding edge |
| CN106239956A (en) * | 2016-08-11 | 2016-12-21 | 泉州玉环模具有限公司 | A kind of moulding process of integral shoes |
| CN108688047A (en) * | 2018-05-10 | 2018-10-23 | 朱连成 | Manufacture craft, daily necessities, pillow, pillow and the back cushion of daily necessities |
| CN109927230A (en) * | 2019-02-22 | 2019-06-25 | 昆山晟豪鑫精密模塑制品有限公司 | A kind of cold base foaming manufacture craft of double-colored composite sole |
| CN110000982A (en) * | 2019-03-21 | 2019-07-12 | 福建钜闽机械有限公司 | A kind of safe handling method of Novel EVA secondary frothing forming machine |
| CN111605117A (en) * | 2019-12-23 | 2020-09-01 | 东莞市松裕塑胶皮具制品有限公司 | Process for molding E-TPU mobile phone protective shell through secondary compression molding |
| CN111660594A (en) * | 2020-05-26 | 2020-09-15 | 蓝世梁 | Gas foaming double-layer color sole and manufacturing method thereof |
| CN113085076A (en) * | 2021-04-17 | 2021-07-09 | 东莞理工学院 | Three-color foaming sole forming method and cold blank sole primary blank forming machine thereof |
| CN114523703A (en) * | 2022-03-14 | 2022-05-24 | 泉州耐保鞋业有限公司 | Method for manufacturing double-color double-density sole |
| CN114801008A (en) * | 2022-05-10 | 2022-07-29 | 袁大彩 | Method for manufacturing double-layer multicolor multi-physical-property foaming product |
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| CN105729848B (en) * | 2016-04-18 | 2019-10-18 | 斯凯奇鞋业（东莞）有限公司 | Monochrome projects the method that plate produces double-color and double-hardness sole every color in board use |
| CN105729848A (en) * | 2016-04-18 | 2016-07-06 | 斯凯奇鞋业（东莞）有限公司 | Method for producing double-color and double-hardness sole through single-color injection machine table by using middle plate to separate colors |
| CN106239956A (en) * | 2016-08-11 | 2016-12-21 | 泉州玉环模具有限公司 | A kind of moulding process of integral shoes |
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| CN108688047A (en) * | 2018-05-10 | 2018-10-23 | 朱连成 | Manufacture craft, daily necessities, pillow, pillow and the back cushion of daily necessities |
| CN109927230A (en) * | 2019-02-22 | 2019-06-25 | 昆山晟豪鑫精密模塑制品有限公司 | A kind of cold base foaming manufacture craft of double-colored composite sole |
| CN110000982A (en) * | 2019-03-21 | 2019-07-12 | 福建钜闽机械有限公司 | A kind of safe handling method of Novel EVA secondary frothing forming machine |
| CN111605117A (en) * | 2019-12-23 | 2020-09-01 | 东莞市松裕塑胶皮具制品有限公司 | Process for molding E-TPU mobile phone protective shell through secondary compression molding |
| CN111660594A (en) * | 2020-05-26 | 2020-09-15 | 蓝世梁 | Gas foaming double-layer color sole and manufacturing method thereof |
| CN113085076A (en) * | 2021-04-17 | 2021-07-09 | 东莞理工学院 | Three-color foaming sole forming method and cold blank sole primary blank forming machine thereof |
| CN114523703A (en) * | 2022-03-14 | 2022-05-24 | 泉州耐保鞋业有限公司 | Method for manufacturing double-color double-density sole |
| CN114523703B (en) * | 2022-03-14 | 2023-09-22 | 泉州耐保鞋业有限公司 | Manufacturing method of double-color double-density sole |
| CN114801008A (en) * | 2022-05-10 | 2022-07-29 | 袁大彩 | Method for manufacturing double-layer multicolor multi-physical-property foaming product |
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