How to control the color difference of the injection molding machine screw?How to control the color difference of the injection molding machine screw?
How to control the color difference of the injection molding machine screw?
1. Reducing the effect of barrel temperature on color difference
During production, it is often encountered that a heating ring is damaged or failed, or the heating control part is out of control and burned to form a sharp change in the temperature of the barrel and then color difference occurs. The chromatic aberration caused by this kind of reason is easy to determine. Generally, the chromatic aberration occurs when the heating ring is damaged and fails, which is accompanied by uneven plasticization, and the uncontrolled long burning of the heating control part is often accompanied by product plaque, severe discoloration, and even scorch.
2. Eliminate the influence of injection molding machine and mold elements
Select the injection molding machine with the capacity appropriate for the main product of the injection. If the injection screw has problems such as material dead angle, it is best to replace the equipment. As for the color difference of mold pouring system, exhaust groove, etc., it can be handled by repairing the mold of the corresponding part. It is necessary to deal with the problems of injection molding machines and molds before we can organize production to reduce the complexity of the problem.
3. Reduce the impact of injection molding process adjustment
When the injection molding process parameters need to be adjusted for non-color difference reasons, try not to change the injection temperature, back pressure, injection cycle and the amount of color masterbatch as much as possible. At the same time, it is necessary to investigate the impact of the process parameter changes on the color and luster.