In the processing of die products, what are the reasons for the large surface roughness and lack of gloss? Below our factory from the mold processing equipment, injection mold, plastic mold, mold processing technology and raw materials to give you a good analysis.

1. In terms of mold processing equipment, it is most likely caused by insufficient material supply, resulting in the processed products not up to standard.

2. In terms of injection mold and plastic mold, it may be because the gate is too small or the runner is too fine, such as poor polishing, mechanical wear, damp fog, rust is not cleared, etc., making the surface with fine convex and concave, poor exhaust: no cold material well, etc.

3. In terms of mold processing technology, there are mainly the following four points.

(1) the cylinder heating is not uniform, the cylinder temperature is too high or low material temperature, mold temperature is low, so that the plastic injection molding workpiece on the cavity surface is prematurely condensed and hardened away from the mold surface, can not reproduce the cavity surface roughness, lose luster.
(2) low injection pressure, injection speed is too slow, injection time is insufficient, resulting in poor sealing of plastic workpiece, affecting luster,
(3) The injection rate is too large or too small.
(4) the cooling time is too short, insufficient cooling of the plastic injection molding workpiece, so that the surface is deglazed, then the gate should be increased, reduce the temperature of the injection mold and increase the cooling time

4. Raw materials

(1) Raw materials are not dried and contain volatile substances, which are easy to agglutinate on the surface when encountering cold cavity, preventing the close contact between the melt and the die surface.
(2) Degradation of plastics affects the tone.
(3) the amount of additives or release agent is too much or the quality is not good, mixed with dust, plastic injection molding workpiece fuzzy dark, pitting point.