We in the injection molding processing, often because some do not pay attention to, and bring about plastic products defects, which affect the efficiency of the injection molding processing. Below, we had to simple analysis of the injection molding processing and the problem of uneven color, oh.
In the process of the injection molding processing, in order to make the color of the plastic parts have more abundant, we will add color material in the material, however, because of one sort or another reason, still can appear the phenomenon of uneven colors. So, what is the cause of uneven colors injection tooling?
1, the proliferation of colorant, this kind of situation often appears near the gate pattern.
2, plastic or coloring hot stability, stable tonal parts, must strictly fixed production conditions, especially the feed temperature, feed rate and production cycle.
3, to the crystalline plastics, try to make the cooling speed of stamping parts is consistent, for wall thickness difference big parts, can be masking off color with colorants, for wall thickness is uniform to fixed parts and mold temperature.
4, the shape of the parts and the gate form, the position of plastic filling, make parts of some local produce off color, when it is necessary to modify.
We in the injection molding processing. If we can very good control over four o 'clock, can well control the color of the plastic, greatly reduce the probability of occurrence chromatism.