The judgement of plastic product aberration

When molding plastic products, its product colors and materials has a direct touch its mainly manifested in the following aspects:

1. The color relations with incoming plastic granule. Due to the product raw material plastic material batch change frequently, and each batch of raw material Material, were inconsistent aberration phenomenon, such as some incoming slant blue color, has the processing slant red color, and so on, so we in the acceptance of incoming (sample) must sample product contrast aberration with customer's original sample and luster. Only in color and luster completely in line with and without other problems when the material can be thought of as good.

Relationship. 2. The color and material tube temperature used material aberration with the feed tube temperature relationship which were as follows; Feed tube at the higher temperature, a partial value red color, b value big yellow, L value little darker. But there are also in the process of forming phase for special case, so in molding should also to match the die temperature in debugging off color problem. Mould temperature, the higher the L value into negative dimmed, a, b.

3 colors and material drying temperature care generally speaking, the color and material drying temperature also has relatively direct contact: such as PC/PA transparent material, drying temperature too high and the time is too long, the color will be become yellow or black, forming the product transparency. Such as ABS material, drying temperature too high or too long, will lead to poor products change yellow and sex. We in front of the molding products must be in 3 to 4 hours before starting the preliminary drying to dry materials will be not too long time and too high temperature baking, so as to avoid product color run, as a result of product aberration And bad. But when molding material tube temperature is too high there will be some phase should be quality problem,, such as product performance, product package (poor exhaust) wind and so on. So I have aberration when molding products mainly come from raw materials incoming problem, method of control can only play an auxiliary role.

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