Injection molding method for super-thick transparent bi-color cladding piece

A technology of injection molding and covering parts, which is applied in the field of injection molding of super-thick transparent two-color covering parts, can solve the problems of sink marks, difficult product optimization and process design, and bubbles are easy to appear in super-thick parts, so as to achieve simple shape and ensure the effect of strength

Inactive Publication Date: 2019-03-19
QINGDAO JUSTUSE MOLDS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing two-color technology involves less in the outer transparent parts, especially the outer transparent fully covered parts, because the outer layer is transparent, the small defects in the inner layer will be magnified, and the injection molding of ultra-thick parts is very easy to appear Bubbles, sink marks and other defects, so it is a difficult problem in product optimization and process design

Method used

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  • Injection molding method for super-thick transparent bi-color cladding piece
  • Injection molding method for super-thick transparent bi-color cladding piece
  • Injection molding method for super-thick transparent bi-color cladding piece

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Embodiment 1

[0031] Embodiment 1, with reference to Figure 1-3 , an injection molding method for an ultra-thick transparent two-color covering part, comprising the following steps;

[0032] Step 1. Injection molding of colored inner layer:

[0033] S1. Evenly mix the high-strength resin and the dye together to prepare a preset color, and add the mixed high-strength resin into the prefabricated mold. The colored inner layer 1 can be changed according to the prefabricated color required. pigment, and increase the R angle at the sharp corner of the far end of the coating to improve the fusion between the two layers. When the colored inner layer 1 is injection molded, the gate is placed in the middle of the bifurcation of the foot to ensure the two-color transparent system There is no shrinkage and no air bubbles in the thickest part of the piece;

[0034] S2. Using high temperature and high pressure injection molding, the injection temperature is controlled at 270°C, the injection pressure...

Embodiment 2

[0041] Embodiment 2, with reference to Figure 1-3 , an injection molding method for an ultra-thick transparent two-color covering part, comprising the following steps;

[0042] Step 1. Injection molding of colored inner layer:

[0043] S1. Evenly mix the high-strength resin and the dye together to prepare a preset color, and add the mixed high-strength resin into the prefabricated mold. The colored inner layer 1 can be changed according to the prefabricated color required. pigment, and increase the R angle at the sharp corner of the far end of the coating to improve the fusion between the two layers. When the colored inner layer 1 is injection molded, the gate is placed in the middle of the bifurcation of the foot to ensure the two-color transparent system There is no shrinkage and no air bubbles in the thickest part of the piece;

[0044] S2. Using high temperature and high pressure injection molding, the injection temperature is controlled at 270°C, the injection pressure...

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Abstract

The invention relates to the technical field of injection molding, in particular to an injection molding method for a super-thick transparent bi-color cladding piece. The injection molding method forthe super-thick transparent bi-color cladding piece comprises the following steps of (1) injection molding a colored inner layer; (2) injection molding a transparent outer layer; and (3) injection molding a bi-color transparent workpiece: placing the injection-molded colored inner layer into an injection mold prefabricated through the transparent outer layer, cladding for injection molding the second layer of transparent outer layer, and obtaining the bi-color transparent workpiece with two-color fusion. According to the injection molding method for the super-thick transparent bi-color cladding piece provided by the invention, through the reasonable layering of wall thicknesses of two layers of the colored inner layer and the transparent outer layer, the optimal design of a colored inner layer product injection molding tail end, the reasonable gate location and shape, the reasonable program processing control, and the bi-color injection molding process control, the super-thick transparent bi-color cladding piece with the transparent outer layer and the multi-color changeable inner layer is obtained, and the super-thick transparent product has no bubbles, sink marks or rill marks, and has a high-strength performance.

Description

technical field [0001] The invention relates to the technical field of injection molding, in particular to an injection molding method for an ultra-thick transparent two-color covering part. Background technique [0002] At present, the application status of such large transparent two-color parts and molds at home and abroad is not very common, only in some high-end consumer products, and the product size is small, and the realization is also a small product; [0003] The existing two-color technology involves less in the outer transparent parts, especially the outer transparent fully covered parts, because the outer layer is transparent, the small defects in the inner layer will be magnified, and the injection molding of ultra-thick parts is very easy to appear Bubbles, sink marks and other defects, so it is a difficult problem in product optimization and process design. Contents of the invention [0004] The object of the present invention is to provide an injection mol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/16
CPCB29C45/1615
Inventor 于昕世史允岭宋健华许善鹏刘瑞鹏李景
Owner QINGDAO JUSTUSE MOLDS TECH
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