Injection deformation causes and solutions

Injection molding is similar to a shape of the mold cavity but a warped version of the shape of the mold cavity. Reasons for problems that may occur: (1) Bending is because there are too many internal stress within the injection molded parts. (2) mold filling speed. (3) less than the mold cavity of plastic.
(4) plastic temperature is too low or inconsistent. (5) at the top of injection molded parts too hot out.
(6) inadequate cooling or move, scheduled to die temperature is inconsistent.
(7) injection irrational structure (such as ribs concentrated on one side, but far away).can you stain composite decking

Remedy: (1) reduce the injection pressure. (2) reduce the screw forward time. (3) increasing the cycle time (especially the cooling time). From the mold after (especially thick injection molded parts) top out immediately immersed in warm water (38 ��) makes injection molded parts to cool slowly.
(4) increase the injection speed. (5) increase the temperature of the plastic. (6) with cooling equipment.
(7) appropriate to increase the cooling time or improve cooling conditions, as far as possible to ensure the move, scheduled to die mold temperature consistent.
(8) to improve the structure of the plastic parts in the permit in accordance with the actual situation.outdoor bar of composite decking

Transparent plastic due to high light transmittance, a necessary requirement plastic surface strict quality requirements, can not have any markings, pores, whitening, fog halo, black spots, discoloration, poor gloss and other defects, and thus the entire injection molding process for raw materials, equipment, molds, and even product design, have very strict attention and even made ??a special request. Second, because of transparent plastic, mostly high melting point, poor mobility, so as to ensure the surface quality of the product, often require a higher temperature, injection pressure, injection speed and other parameters should also make subtle adjustments to make when both full of plastic injection molding, it will not produce stress and cause deformation and cracking.plastic decking price

Therefore, from raw material preparation, equipment and tooling requirements, raw material injection molding process and product handling aspects of the operation should be carried out strictly.Shanghai Seven Trust Company,Wood Plastic Composite