LDPE Injection Molding Service

Typical processing parameters for LDPE injection molding include a melt temperature range of 170-240°C and a mold temperature range of 20-70°C. The injection pressure should be between 70-140 MPa, depending on the complexity of the part and the flow characteristics of the LDPE material. Cooling time is crucial to ensure proper part formation and can vary based on the part’s thickness and geometry. It is also essential to control the injection speed and hold pressure to avoid defects such as sink marks, voids, and warpage. Pre-drying the material is generally not necessary due to LDPE’s low moisture absorption.

Achieving a good surface finish and dimensional accuracy with LDPE injection molding involves several key factors. Ensuring uniform mold temperature and proper cooling channels helps maintain consistent part quality. Using a mold with a high polish or textured surface can enhance the finish of the final product. Proper gate design and location are critical to controlling material flow and minimizing defects such as weld lines and flash. Maintaining optimal injection speed and pressure during the molding process helps achieve precise dimensions and reduces the risk of warpage or shrinkage.