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Injection molding process capable of reducing injection outsole bubbles

A bubble and process technology, applied in footwear, other household appliances, household appliances, etc., can solve the problems of inability to complete post-modification, inability to detect with the naked eye, etc., to save labor hours, facilitate mold opening, and reduce waste.

Pending Publication Date: 2019-04-09
山东百华鞋业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Injecting PU outsoles will produce a lot of air bubbles during the injection process. Outsoles with a diameter of more than 3MM are defective products, and the outsole with a diameter of more than 5MM cannot be modified in the later stage and can only be scrapped
The air bubbles injected into the outsole are hidden in the bottom layer of the outsole and cannot be found with the naked eye

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A specific embodiment of the above process,

[0027] a) The preparation process, including: preparation of shoe materials: finishing the lasting, fluffing, and lamination of steel plates on the upper; preparation of materials: pouring chemical materials into the batching tank, adjusting the temperature and keeping stirring; preparation of equipment: starting the injection molding line and adjusting it to normal Turn on the speed, turn on the heating;

[0028] b) The bottom mold is sprayed with a treatment agent, which is a mold release agent and sprayed evenly into a mist to prevent excessive formation of water droplets;

[0029] c) For one injection, set the corresponding injection amount according to the size of the shoe, inject the chemical materials into the bottom mold groove, and inject all the chemical materials into the bottom mold groove for one injection;

[0030] d) One-time injection molding, after one injection, lay a layer of non-woven fabric on top of th...

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PUM

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Abstract

The invention relates to the field of shoe outsole machining, and provides an injection molding process capable of reducing injection outsole bubbles. The process comprises following steps that that ashoe material is prepared, primary injection is carried out, after primary injection, a layer of non-woven fabric is laid in a bottom mold, a demolding cloth is laid above the non-woven fabric, a mold cover plate is rapidly subjected to covering, locking is carried out, and a mold enters an oven; the mold is baked in the oven, the mold cover plate is opened, the demolding cloth and the non-wovenfabric are removed, and checking is carried out; secondary injection is carried out; when the non-woven fabric is foamed, generated bubbles can be broken, the number of the formed bubbles can be reduced, waste can be reduced by 30%, cost is low, mold sinking is convenient, and the flow of spraying a demolding agent is removed; due to the peeling strength between the secondary injection and the primary injection, firmness is greatly increased, and the influence of residue of a demolding machine on the secondary injection is avoided.

Description

technical field [0001] The invention relates to the field of shoe outsole processing, in particular to an injection molding process capable of reducing air bubbles in the injection outsole. Background technique [0002] Injection of PU outsoles will produce a large number of air bubbles during the injection process. Outsoles with a diameter of more than 3MM are defective products, and the outsoles with a diameter of more than 5MM cannot be modified in the later stage and can only be scrapped. The air bubbles injected into the outsole are hidden in the bottom layer of the outsole and cannot be found with the naked eye. The double-density injection foamed PU outsole requires two injections, one injection for the outsole and the second injection for the midsole. The foaming process of the first injection occurs completely inside the closed mold, and the bubbles generated are not easy to discharge. Contents of the invention [0003] In order to solve the above-mentioned techn...

Claims

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Application Information

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IPC IPC(8): B29D35/14
CPCB29D35/0009B29D35/142
Inventor 牛兴华郭兴梅
Owner 山东百华鞋业有限公司
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