In the injection molding process, thin-walled injection molding tends to cause warping deformation and cracking. Therefore, thin-wall injection molding has higher requirements for mold design. Compared with ordinary injection molding products, thin-wall injection molding molds have the following Features:
(1) The rigidity, strength, and wear resistance of the mold. Thin wall injection molding requires a higher injection pressure. Therefore, the thin wall injection mold has a large rigidity and strength, and the pressure tolerance is good. Thin-walled injection molds often use thicker stencils and more support columns.
(2) The mold should be cooled evenly. Compared with ordinary plastic parts, thin-wall injection molded plastic parts have less tolerance to residual stress, and often have problems such as warpage and deformation. Therefore, it is necessary to strengthen the cooling of the mold to ensure the dimensional stability of the plastic parts.
(3) Ensure the balance of the gating system. Due to the high requirements on the gate for forming thin-walled plastic parts, large gates are used and the thickness of the gate is greater than the wall thickness. For this reason, thin-wall injection molds often use a runner-less casting system.