Plastic injection process

A process, injection molding technology, applied in the coating and other directions, can solve the problem that the mold and injection cannot be realized, and achieve the effect of enhancing the hardness

Active Publication Date: 2016-06-29
GUANGDONG XIAOTIANCAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the above-mentioned mold structure, mold and injection molding cannot realize

Method used

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  • Plastic injection process
  • Plastic injection process
  • Plastic injection process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment requires injection molding products such as figure 1 as shown, figure 2 It is the specific injection molding part of this product, and the injection mold used in injection molding is formulated according to the product structure.

[0026] The specific injection molding process of the product of this embodiment comprises the following steps:

[0027] (1) The first injection molding; the raw material used in this step is the first soft rubber 1, the first soft rubber 1 needs to satisfy its hardness within the range of 65-85 degrees, such as TPU, TPE, TPSIV or TPF, this implementation The first soft glue 1 of the example is specifically TPU. The injection pressure of this step is 40MPa, and the injection temperature is 180°C;

[0028] (2) The second injection molding; the raw material used in this step is the second soft rubber 2, and the second soft rubber 2 needs to satisfy its hardness in the range of 65-75D, such as TPU or TPE. The second soft rubb...

Embodiment 2

[0032] The difference between this example and Example 1 is that the first soft rubber used in the first injection molding is TPSIV, the injection pressure is 45MPa, and the injection temperature is 190°C; the second soft rubber used in the first injection molding is TPU, and the injection molding The pressure is 35MPa, and the injection molding temperature is 190°C.

Embodiment 3

[0034] The difference between this example and Example 1 is that the first soft rubber used for the first injection molding is TPF, the injection pressure is 50 MPa, and the injection temperature is 200°C; the second soft rubber used for the first injection molding is TPU, and the injection molding The pressure is 40MPa, and the injection molding temperature is 200°C.

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Abstract

The invention relates to a plastic injection process which comprises the following steps: (1) carrying out primary injection molding by adopting first soft rubber, wherein the hardness of the first soft rubber is 65-85 degrees; and (2) carrying out secondary injection molding by adopting secondary soft rubber, wherein the hardness of the secondary soft rubber is 65-75D. According to the plastic injection process, the two plastic injection processes both adopt the soft rubber (the first and second soft rubber); as the injection molding temperature and the injection molding pressure of the soft rubber are both lower than those of hard rubber, and in addition, the temperature and the pressure of the second soft rubber adopted by the secondary injection molding are low, the forming purpose can be reached, and thus the first soft rubber adopted by the primary injection molding cannot be burnt yellow or deform by extrusion.

Description

technical field [0001] The invention relates to an injection molding process, which belongs to the technical field of injection molding. Background technique [0002] The principle of the traditional secondary molding of plastics is: hard plastic is formed for the first time, and soft rubber is formed for the second time (ie, set beer). Due to the high injection pressure of hard rubber molding (conventional injection molding pressure is 80-120MPa) and high temperature (conventional injection molding temperature is about 300°C); if the order is reversed, the excessively high injection molding temperature of hard rubber will burn the soft rubber; Excessive injection pressure of the rubber will squeeze and deform the soft rubber. [0003] If the hard rubber and the soft rubber are injection molded together through two moldings, the hard rubber can be placed in the mold of the soft rubber for the second molding after the hard rubber is formed for the first time. But, according...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14B29K75/00B29K101/12B29K21/00B29K27/12
CPCB29C45/0001B29C45/14B29K2101/12B29K2075/00B29K2027/12B29K2221/003
Inventor 刘超
Owner GUANGDONG XIAOTIANCAI TECH CO LTD
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