What are the common defects of chemical plastic drums

Defect 1: Poor surface gloss

The main reason for this situation is that the mold roughness is high, and on the other hand, premature condensation prevents the resin from replicating the surface state of the mold. All of these factors result in small unevenness on the surface of the plastic bucket product, causing the product to lose its luster.

Defect 2: Welding marks

The main reason for this situation is that a linear trace on the surface of the plastic part is caused by several streams of injected or extruded materials flowing and converging in the mold. The molten materials are not completely fused at the interface and cannot be fused together, resulting in fusion marks that affect the appearance quality and mechanical properties of the plastic part.

In addition to the above two defects, the anisotropic effect of internal stress during the filling and condensation process of chemical plastic barrel products causes the resin to flow upward orientation, resulting in a different refractive index from non flow orientation and the formation of flash lines. When it expands, it may cause cracks in the product. In addition to paying attention to the injection molding process and molds, it is best to perform annealing treatment on the product.