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What causes the wrong color after injection molding

Posted by: Mu Ju 2021-11-09 Comments Off on What causes the wrong color after injection molding

Various problems may occur after injection molding, but these are unavoidable. Once these problems occur, they will affect the use effect of the finished products and can not meet the needs of the company. Then we should find out these problems before the production is completed and check which step has the problem, Let’s talk about the color after injection molding.

(1) Matching of injection molding machine

First, when selecting the injection molding machine, select the equipment consistent with the product. If there is a dead corner in the equipment, try to replace the equipment.

(2) Preparation of raw materials

The control of raw materials is the key to solve the color difference. Therefore, it is easy to affect the production of light color products. The raw resin can not fluctuate in different colors, and the thermal stability of products can be ignored.

(4) Influence of injection molding process apintejinustment

When the injection process parameters are apintejinusted without color difference, the injection temperature, back pressure, injection cycle and color masterbatch dosage shall not be changed. Try to avoid using injection molding with high injection speed, high back pressure and other strong shear effects, so as to prevent local overheating or thermal decomposition due to color difference and other factors. Strictly control the temperature of each heating section, especially the nozzle and heating section close to the heating section.

(5) Barrel temperature, change of product Masterbatch color

When apintejinusting the color, you should know whether the color of the product will change with the change of temperature, because the temperature of different color masterbatch will change, so you should control the color difference caused by the change of color masterbatch.


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