CN203004198U

CN203004198U - Die for preparing polyurethane injection shoe

Info

Publication number: CN203004198U
Application number: CN 201220712961
Authority: CN
Inventors: 严顺鹏
Original assignee: SUZHOU TA&A ULTRA CLEAN TECHNOLOGY Co Ltd
Current assignee: SUZHOU TA&A ULTRA CLEAN TECHNOLOGY Co Ltd
Priority date: 2012-12-21
Filing date: 2012-12-21
Publication date: 2013-06-19
Anticipated expiration: 2022-12-21

Abstract

The utility model discloses a die for preparing a polyurethane injection shoe. The die comprises a die body which is composed of a die cover, an upper die and a lower die, wherein a die cavity, in which a polyurethane mixing solution is injected, is formed inside the lower die; a gas guide film is arranged on the surface of the lower die in a matching manner; and a hollow cavity matched with the die cavity of the lower die is formed inside the upper die. Air in the die can be effectively discharged, so that the yield of products is improved, and the cost is low.

Description

A kind of preparation mould of polyurethane injection moulded shoes

Technical field

The utility model relates to a kind of polyurethane injection moulded shoes, is specifically related to a kind of preparation mould of polyurethane injection moulded shoes.

Background technology

Polyurethane is to contain the polymer of 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 mainly prepared by the various polyalcohols combination material that contain terminal hydroxy group and multicomponent isocyanate reaction.Select the raw material of different numbers and type functional group, adopt different synthetic and preparation technologies, can prepare that performance is different, the various polyurethane of manifestation mode, polyurethane has become indispensable material in the every field such as daily clothing, food, lodging and transportion--basic necessities of life of people.

An important use of polyurethane is exactly the manufactured materials as the injection moulded shoes sole, and compares the advantage such as have environmental protection, light, comfortable, not yielding at the bottom of other city shoe, therefore more and more is subject to consumer's favor.Usually the polyurethane injection moulded shoes comprises the sole identical by two-layer material, that density is different, by polyurethane mixed liquor direct foaming in mould, so-called foaming says that exactly the foaminess resin directly inserts in mould, makes its melted by heating, form the gas-liquid saturated solution, by nucleation, form a large amount of small complexs, complex increases, support the foam plastic, foaming method commonly used has three kinds: physical blowing method, chemical blowing process, mechanical foaming method.

The polyurethane injection moulded shoes adopts the mold closing cast usually at present, before the polyurethane mixed liquor is injected mould, first at the die surface release agent spraying, then the polyurethane mixed liquor is poured into mould, follows closed mould, the rear demoulding to be formed.Above-mentioned preparation method has the following disadvantages in actual use: in ⑴ polyurethane mixed liquor foamed forming process, mould is in closed state, in mould, residual air can not effectively be discharged, cause having on product the incompleteness of Bubble formation, be that product percent of pass is low, appearance is poor, even can have influence on the physical property of sole; If avoid the residual of air, adopt vacuum pumping technology can accomplish effectively to discharge air after matched moulds, but cost is higher like this, medium-sized and small enterprises can't bear; ⑶ the releasing agent that double-deck sole joint portion is residual affects the bonding strength of sole, directly affects the quality of finished product shoes.

The utility model content

The utility model purpose is to provide a kind of preparation mould of polyurethane injection moulded shoes, uses the method and mould, makes in preparation process the air in mould effectively to discharge, and need not to use releasing agent, improved the qualification rate of product, and cost is also lower.

The technical solution of the utility model is:

A kind of preparation mould of polyurethane injection moulded shoes, comprise a die ontology, described die ontology is made of die cap, patrix and counterdie, offer in described counterdie for the die cavity that injects polyurethane mixed liquor foaming ground floor sole, described counterdie surface engagement is provided with an air-guiding film, offers the cavity that coordinates with the die cavity of described counterdie, be used for injecting polyurethane mixed liquor foaming second layer sole in described patrix.

Further technical scheme, described air-guiding film is made of the synthetic Web materials of tow groups, spaced apartly on described air-guiding film is provided with a plurality of gas ports.

Further technical scheme, described die cap are a flat board of fitting with the counterdie surface.

The utility model has the advantages that:

1. the utility model passes through at counterdie surface laying one deck air-guiding film, make in preparation process that in mould, residual air can be discharged from effectively by air-guiding film, improved the qualification rate of product, and outward appearance is also comparatively attractive in appearance, the physical property of product also is guaranteed;

2. double-deck sole bound fraction of the present utility model does not use releasing agent, makes the joint portion bond strength of double-deck sole increase, and quality is better;

3. the utility model need not to use vacuum pumping technology to discharge the interior air of mould as compared with the past, and cost is lower, is fit to generally use.

Description of drawings

Below in conjunction with drawings and Examples, the utility model is further described:

Fig. 1 is the structural representation when preparing the ground floor sole in the utility model;

Fig. 2 is the structural representation when preparing second layer sole in the utility model;

Fig. 3 is the floor map of air-guiding film in the utility model.

Wherein: 1, die cap; 2, patrix; 3, counterdie; 4, die cavity; 5, air-guiding film; 6, cavity; 7, gas port.

The specific embodiment

Referring to shown in Fig. 1 to 3, a kind of preparation mould of polyurethane injection moulded shoes, comprise a die ontology, described die ontology is made of die cap 1, patrix 2 and counterdie 3, offer in described counterdie 3 for the die cavity 4 that injects the polyurethane mixed liquor, described counterdie 3 surface engagement are provided with an air-guiding film 5, offer the cavity 6 that coordinates with the die cavity 4 of described counterdie 3 in described patrix 2, described air-guiding film 5 is made of the synthetic Web materials of tow groups, spaced apartly on described air-guiding film 5 be provided with a plurality of gas ports 7, described die cap is a flat board of fitting with the counterdie surface.

A kind of preparation method of polyurethane injection moulded shoes comprises the steps:

Step 1, lay air-guiding film on the counterdie of mould surface, then with counterdie and die cap matched moulds;

Step 2, inject polyurethane mixed liquor, foaming ground floor sole in the mould;

Step 3, open mould, change after patrix and the counterdie matched moulds, this moment, the ground floor sole was stayed in counterdie;

Step 4, inject polyurethane mixed liquor, foaming second layer sole in the mould;

Step 5, open mould, the sole of foaming is deviate from from counterdie;

Step 6, pruning air-guiding film are completed the sole preparation.

The polyurethane injection moulded shoes is in preparation process, after the mould matched moulds, residual air is squeezed the mould upper end by the pressure that polyurethane foam produced in mould, discharge in gap between the fibre bundle on air-guiding film, when preparation second layer sole, because the ground floor sole is identical with the material of second layer sole, therefore, the material part of second layer sole can be passed the gas port of air-guiding film, be combined with the ground floor sole, and the double-deck sole bound fraction need not to use releasing agent, so greatly improved the adhesion of double-deck sole.

Above-described embodiment only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalent transformation or modifications of doing according to the Spirit Essence of the utility model main technical schemes are within all should being encompassed in protection domain of the present utility model.

Claims

1. the preparation mould of a polyurethane injection moulded shoes, comprise a die ontology, it is characterized in that: described die ontology is by die cap (1), patrix (2) and counterdie (3) consist of, offer in described counterdie (3) for the die cavity (4) that injects polyurethane mixed liquor foaming ground floor sole, described counterdie (3) surface engagement is provided with an air-guiding film (5), offer in described patrix (2) and coordinate with the die cavity (4) of described counterdie (3), be used for injecting the cavity (6) of polyurethane mixed liquor foaming second layer sole.

2. the preparation mould of a kind of polyurethane injection moulded shoes according to claim 1 is characterized in that: described air-guiding film is made of the synthetic Web materials of tow groups, the upper spaced apart a plurality of gas ports (7) that are provided with of described air-guiding film (5).

3. the preparation mould of a kind of polyurethane injection moulded shoes according to claim 1 is characterized in that: described die cap is a flat board of fitting with the counterdie surface.