What is the cause of the wrong color after injection molding

2021-03-23 11:42:56 admin

What is the cause of 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 product and cannot meet the needs of the company. Then we must integrate these before the production is completed. Find out the problem, check which step is wrong, and let me talk about the color problem after injection molding.

(1) Matching of injection molding machine

First, when choosing an injection molding machine, choose the equipment that matches the product. If the equipment has dead ends, try to replace the equipment.

(2) Preparation of raw materials

The control of raw materials is the key to solving chromatic aberration. Therefore, it is easy to affect the production of light-colored products, and the raw material resin cannot be ignored in the thermal stability of the products with different color fluctuations.

(4) The influence of the adjustment of the injection molding process

When adjusting the injection process parameters without color difference, the injection temperature, back pressure, injection cycle and color masterbatch dosage must not be changed. Try to avoid using injection molds with high injection speed, high back pressure and other strong shearing effects to prevent local overheating or thermal decomposition caused by factors such as color difference. Strictly control the temperature of each heating section, especially the nozzle and heating section near the heating section.

(5) The temperature of the barrel, the amount of change in the color of the product masterbatch

When adjusting the color, it is necessary to know whether the color of the product will change with the change of temperature, because the temperature of different masterbatch production changes, so the color difference caused by the change of the masterbatch must be controlled.