CN103042648B - Preparation method for polyurethane injection molded shoes and preparation mold - Google Patents
Preparation method for polyurethane injection molded shoes and preparation mold Download PDFInfo
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- CN103042648B CN103042648B CN201210560641.3A CN201210560641A CN103042648B CN 103042648 B CN103042648 B CN 103042648B CN 201210560641 A CN201210560641 A CN 201210560641A CN 103042648 B CN103042648 B CN 103042648B
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Abstract
The invention discloses a preparation method for a pair of polyurethane injection molded shoes, which comprises the following steps: an air guide film is laid on the surface of a lower die of a mold, and the lower die and a die cover are subjected to die assembly; a polyurethane mixed solution is injected into the mold, a first layer of shoe sole is formed in a foaming manner; the mold is opened, after the upper die is replaced, the upper die and the lower die are subjected to the die assembly, and at the moment, the first layer of shoe sole is reserved in the lower die; the polyurethane mixed solution is injected into the mold, a second layer of shoe sole is formed in a foaming manner; the mold is opened, and the shoe sole which is formed in a foaming manner is taken off from the lower die; and the air guide film is clipped, and the shoe sole preparation is completed. The preparation mold comprises a mold body, which consists of the die cover, the upper die and the lower die, a die cavity for the polyurethane mixed solution injection is formed in the lower die, the air guide film is formed on the surface of the lower die in a matched manner, and a cavity matched with the die cavity of the lower die is formed in the upper die. According to the invention, the air in the mold can be effectively discharged, the product qualified rate is improved, and the cost is low.
Description
Technical field
The present invention relates to a kind of polyurethane injection moulded shoes, be specifically related to a kind of preparation method of polyurethane injection moulded shoes and prepare mould.
Background technology
Polyurethane is the polymer containing many carbamate groups (-NHCOO-) on a kind of macromolecular structure main chain, it is class purposes synthetic material very widely, and its suitability for industrialized production is prepared primarily of the various polyhydric alcohol conjugate material containing terminal hydroxy group and multicomponent isocyanate reaction.Select the raw material of different number and type functional group, adopt different synthesis and preparation technology, can prepare different properties, the various polyurethane of manifestation mode, polyurethane has become indispensable material in the every field such as the daily clothing, food, lodging and transportion--basic necessities of life of people.
An important use of polyurethane is exactly the manufactured materials being used as injection moulded shoes sole, has environmental protection, the advantage such as light, comfortable, not yielding, be therefore more and more subject to the favor of consumer compared with at the bottom of other city shoe.Usual polyurethane injection moulded shoes comprises identical by two-layer material, that density is different sole, by polyurethane mixed liquor direct foaming in a mold, so-called foaming, says that foaminess resin is directly inserted in mould exactly, makes its melted by heating, form gas-liquid saturated solution, by nucleation, form a large amount of small complex, complex increases, support foam plastic, conventional foaming method has three kinds: physical blowing method, chemical blowing process, mechanical foaming method.
Current polyurethane injection moulded shoes adopts mold closing to pour into a mould usually, before polyurethane mixed liquor is injected mould, first at die surface release agent spraying, then polyurethane mixed liquor is poured into mould, then closed mould, the rear demoulding to be formed.Above-mentioned preparation method has the following disadvantages in actual use: (1) in polyurethane mixed liquor foamed forming process, mould is in closed state, air residual in mould can not effectively be discharged, cause incompleteness product having bubble generation, namely product percent of pass is low, appearance is poor, even can have influence on the physical property of sole; (2), if remaining in order to avoid air, adopts vacuum pumping technology can accomplish effectively to discharge air after matched moulds, but cost is higher like this, medium-sized and small enterprises cannot bear; (3) the releasing agent that double-deck sole joint portion is residual, affects the bonding strength of sole, directly affects the quality of finished shoe.
Summary of the invention
The object of the invention is to provide a kind of preparation method of polyurethane injection moulded shoes and prepares mould, use the method and mould, the air in preparation process in mould can effectively be discharged, and without the need to using releasing agent, improve the qualification rate of product, and cost is also lower.
Technical scheme of the present invention is: a kind of preparation method of polyurethane injection moulded shoes, comprises the steps:
Step one, lay air-guiding film, then by counterdie and die cap matched moulds on the counterdie surface of mould;
Step 2, in mould, inject polyurethane mixed liquor, foaming ground floor sole;
Step 3, open mould, take die cap away, change after patrix with counterdie matched moulds, now ground floor sole is stayed in counterdie;
Step 4, in mould, inject polyurethane mixed liquor, foaming second layer sole;
Step 5, open mould, the sole of foaming is deviate from from counterdie;
Step 6, pruning air-guiding film, complete sole preparation.
A kind of polyurethane injection moulded shoes prepare mould, comprise a die ontology, described die ontology is made up of die cap, patrix and counterdie, the die cavity for injecting polyurethane mixed liquor foaming ground floor sole is offered in described counterdie, described counterdie surface engagement is provided with an air-guiding film, offer in described patrix coordinate with the die cavity of described counterdie, for injecting the cavity of polyurethane mixed liquor foaming second layer sole.
Further technical scheme, the Web materials that described air-guiding film is synthesized by tow groups is formed, and spaced apartly on described air-guiding film is provided with a plurality of gas port.
Further technical scheme, described die cap is a flat board of fitting with counterdie surface.
Advantage of the present invention is:
1. the present invention is by laying one deck air-guiding film on counterdie surface, air residual in mould in preparation process is discharged effectively by air-guiding film, improve the qualification rate of product, and outward appearance is also comparatively attractive in appearance, the physical property of product have also been obtained guarantee;
2. double-deck sole bound fraction of the present invention does not use releasing agent, and the joint portion bond strength of double-deck sole is increased, and quality is better;
3. the present invention is as compared with the past without the need to using the air in vacuum pumping technology discharge mould, and cost is lower, is applicable to generally using.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is structural representation when preparing ground floor sole in the present invention;
Fig. 2 is structural representation when preparing second layer sole in the present invention;
Fig. 3 is the floor map of air-guiding film in the present invention.
Wherein: 1, die cap; 2, patrix; 3, counterdie; 4, die cavity; 5, air-guiding film; 6, cavity; 7, gas port.
Detailed description of the invention
See shown in Fig. 1 to 3, a kind of polyurethane injection moulded shoes prepare mould, comprise a die ontology, described die ontology is made up of die cap 1, patrix 2 and counterdie 3, the die cavity 4 for injecting polyurethane mixed liquor is offered in described counterdie 3, described counterdie 3 surface engagement is provided with an air-guiding film 5, the cavity 6 coordinated with the die cavity 4 of described counterdie 3 is offered in described patrix 2, the Web materials that described air-guiding film 5 is synthesized by tow groups is formed, spaced apartly on described air-guiding film 5 be provided with a plurality of gas port 7, described die cap is a flat board of fitting with counterdie surface.
A preparation method for polyurethane injection moulded shoes, comprises the steps:
Step one, lay air-guiding film, then by counterdie and die cap matched moulds on the counterdie surface of mould;
Step 2, in mould, inject polyurethane mixed liquor, foaming ground floor sole;
Step 3, open mould, change after patrix with counterdie matched moulds, now ground floor sole is stayed in counterdie;
Step 4, in mould, inject polyurethane mixed liquor, foaming second layer sole;
Step 5, open mould, the sole of foaming is deviate from from counterdie;
Step 6, pruning air-guiding film, complete sole preparation.
Polyurethane injection moulded shoes is in preparation process, when after mould matched moulds, air residual in mould the pressure that produces by polyurethane foam squeeze mould upper end, gap between fibre bundle on air-guiding film is discharged, when preparing second layer sole, because ground floor sole is identical with the material of second layer sole, therefore, the material component of second layer sole can through the gas port of air-guiding film, be combined with ground floor sole, and double-deck sole bound fraction is without the need to using releasing agent, drastically increase the adhesion of double-deck sole like this.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalent transformations of doing according to the Spirit Essence of main technical schemes of the present invention or modification, all should be encompassed within protection scope of the present invention.
Claims (4)
1. a preparation method for polyurethane injection moulded shoes, is characterized in that, comprises the steps:
Step one, lay air-guiding film, then by counterdie and die cap matched moulds on the counterdie surface of mould;
Step 2, in mould, inject polyurethane mixed liquor, foaming ground floor sole;
Step 3, open mould, take die cap away, change after patrix with counterdie matched moulds, now ground floor sole is stayed in counterdie;
Step 4, in mould, inject polyurethane mixed liquor, foaming second layer sole;
Step 5, open mould, the sole of foaming is deviate from from counterdie;
Step 6, pruning air-guiding film, complete sole preparation.
2. a polyurethane injection moulded shoes prepare mould, comprise a die ontology, it is characterized in that: described die ontology is made up of die cap (1), patrix (2) and counterdie (3), the die cavity (4) for injecting polyurethane mixed liquor foaming ground floor sole is offered in described counterdie (3), described counterdie (3) surface engagement is provided with an air-guiding film (5), offer in described patrix (2) coordinate with the die cavity of described counterdie (3) (4), for injecting the cavity (6) of polyurethane mixed liquor foaming second layer sole.
3. a kind of polyurethane injection moulded shoes according to claim 2 prepare mould, it is characterized in that: the Web materials that described air-guiding film is synthesized by tow groups is formed, described air-guiding film (5) is upper is spaced apartly provided with a plurality of gas port (7).
4. a kind of polyurethane injection moulded shoes according to claim 2 prepare mould, it is characterized in that: described die cap be one with the counterdie surface flat board of fitting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210560641.3A CN103042648B (en) | 2012-12-21 | 2012-12-21 | Preparation method for polyurethane injection molded shoes and preparation mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210560641.3A CN103042648B (en) | 2012-12-21 | 2012-12-21 | Preparation method for polyurethane injection molded shoes and preparation mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103042648A CN103042648A (en) | 2013-04-17 |
| CN103042648B true CN103042648B (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210560641.3A Active CN103042648B (en) | 2012-12-21 | 2012-12-21 | Preparation method for polyurethane injection molded shoes and preparation mold |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104441409A (en) * | 2014-11-04 | 2015-03-25 | 林仔孺 | Production process of foamed TPU (Thermoplastic polyurethane) sole |
| CN104875323A (en) * | 2015-05-27 | 2015-09-02 | 佛山市南方鞋材有限公司 | Shoe outsole production technology |
| CN109810236B (en) * | 2018-09-21 | 2022-04-12 | 张东井 | Method for manufacturing polyurethane sole and polyurethane raw material used for method |
| CN109591345A (en) * | 2018-12-27 | 2019-04-09 | 山东百华鞋业有限公司 | It is a kind of to reduce the Shooting Technique for injecting big basis bubble |
| 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 |
| WO2022116580A1 (en) * | 2020-12-02 | 2022-06-09 | 浙江华峰新材料有限公司 | Product forming method, product, and shoe |
| CN113858530A (en) * | 2021-10-13 | 2021-12-31 | 惠东县黄埠新三友鞋楦厂 | Method for shaping, injection molding and edge folding of women dress sandals |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5503786A (en) * | 1995-08-15 | 1996-04-02 | Yang; Kuo-Nan | Method for forming air chamber in shoe sole |
| US7481637B2 (en) * | 2004-05-12 | 2009-01-27 | Woodbridge Foam Corporation | Vented mold and method for producing molded article |
| CN101637958A (en) * | 2009-03-24 | 2010-02-03 | 天愉国际有限公司 | Forming method of soles |
| CN203004198U (en) * | 2012-12-21 | 2013-06-19 | 苏州天华超净科技股份有限公司 | Die for preparing polyurethane injection shoe |
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| CN103042648A (en) | 2013-04-17 |
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Address after: 215121 No. 99, Shuang Ma Street, Suzhou Industrial Park, Jiangsu, China Patentee after: Suzhou Tianhua New Energy Technology Co.,Ltd. Address before: No. 99, Shuangma Street, Suzhou Industrial Park, Suzhou, Jiangsu 215121 Patentee before: SUZHOU TA&A ULTRA CLEAN TECHNOLOGY Co.,Ltd. |