What injection-molding pressures ensure defect-free polyethylene bar stools?
To ensure defect-free polyethylene bar stools, the injection-molding process must maintain precise pressure levels. Typically, the ideal pressure range for polyethylene (PE) is between 800 to 1,500 psi during the injection phase, with holding pressures around 50-70% of the injection pressure. Proper pressure control prevents common defects like sink marks, warping, or incomplete filling. High-density polyethylene (HDPE) may require higher pressures due to its viscosity, while low-density polyethylene (LDPE) can be molded at lower pressures. Additionally, maintaining consistent melt temperature and cooling rates further enhances product quality. By optimizing these parameters, manufacturers can produce durable, flawless polyethylene bar stools efficiently.
