In the field of injection molding, when we closely observe finished products made of materials such as ABS, PP, and PC, it is not uncommon to find white or shiny marks on their surfaces.

In the field of injection molding, residual stress, the sum of internal stresses that remain unrelaxed after a product is ejected from the mold, is a key factor affecting product quality.

In the field of plastic injection molding, air traps, as a common defect, essentially refer to the phenomenon where air or gas is not promptly expelled from the mold during the injection process and is instead encapsulated within the mold cavity by molten plastic, thereby affecting the product's quality and appearance.