When the injection mold injection molding, if the surface quality of the plastic parts is poor, the appearance of non-gloss, the phenomenon of scar should be solved?
If the surface quality of the plastic parts is poor when injection molding, the appearance of non-gloss and bruises is due to:
(1) does not shine on the surface of the plastic parts is the main reason of the surface gloss, due to the mold cavity surface is not smooth, melts the material and the mold surface is not closed, improper material and mould temperature, etc., the plastic parts surface is not shiny ivory or dark.The adjustment is:
1) if the surface of the mold is not good, the surface of the polishing mold can be.
2) if the melting material is not strong enough, the melt is immediately condensed into a fine convex concave when exposed to the surface of the cavity, and the luster of the plastic parts is reduced.At this time, can improve the material temperature, mold temperature, injection speed and other methods.
3) if the surface of the plastic part is dark, this is due to the volatile matter in the raw material, the raw material should be dried or expanded to vent.
4) if the surface of the plastic parts is made of silver, the raw materials should be dried mainly because of excessive moisture in the plastic.
(2) scratches and scratches on the surface of the plastic parts are scratched and scraped. This is mainly due to abrasions and scratches on the surface of the mold cavity, which is then stamped on the plastic surface intact.At this point, the mold should be polished.If the moulds are not enough or taper, or the plastic parts are tilted at the time of rollout, they should be used to increase the slant and improve the way of pushing.