Usually, the surface of plastic products obtained by this injection moulding method has good gloss and beautiful color, but in the actual injection moulding production process, many products produced by injection moulding factories have relatively large defects in color and gloss. Besides the hard factors such as plastic raw materials, colorants and the surface gloss of the mould, what other reasons will be created? What happened?
(1) The surface of the mould cavity is rusty, and the exhaust of the mould is poor.
(2) The gating system of the mould is defective, so the cooling well should be enlarged, and the runner, polishing main runner, diversion runner and gate should be enlarged.
(3) Material temperature and model temperature are on the low side. If necessary, local heating of gate can be used.
(4) Processing pressure is too low, speed is too slow, injection time is insufficient, back pressure is insufficient, resulting in poor compactness and dark surface.
(5) Plastics should be fully plasticized, but the degradation of materials should be prevented, the heating should be stable, and the cooling should be adequate, especially for thick-walled materials.
(6) Prevent the cold material from entering the parts, and change to self-locking spring or lower the nozzle temperature if necessary.
(7) There are too many recycled materials, poor quality of plastics or colorants, mixed with water vapor or other impurities, and poor quality of lubricants used.
(8) The clamping force should be sufficient.
About PTJMould Industrial Company Limited
PTJmould is a China mold maker of plastic molds- injection mold, die casting moulds, plastic blow molding, rotational molding, medical plastic injection molding, two shot plastic injection molding, insert molding, overmolding, metal injection molding, micro injection molding, powder injection molding, ceramic injection molding, liquid injection molding, husky injection molding, household mold, casting mold, die mold tool, custom molds, china moulds, rapid prototyping tooling, plastic prototyping tooling, punch press tooling, die and tooling for mobile/ cell phone parts, automotive parts, vacuum cleaners, rechargeable tools, telephones, copiers, computers, multimedia speakers, and many other electronic products and household appliances. And also a plastic product manufacturer, mold manufacturer China– plastic parts, plastic water tank, plastic balls, plastic containers, plastic buckle, plastic anchor, plastic hanger, plastic spoon, plastic pipe fitting, plastic tumble, plastic tableware, plastic cups, plastic bottles, plastic tray, plastic cosmetic container, plastic case, plastic food container, plastic chairs, plastic caps, plastic cap closure, plastic tubes, plastic water pipes, plastic knobs, plastic tubing, plastic utility boxes, plastic racks and so on.