Effect of Injection Temperature on Defect Plastic Products

Abstract

The process of plastic injection is one of the plastics forming processes is mostly done. Problems are often experienced in the injection process is the occurrence of product defects in the finished goods so that they can slow down the production process. This study aims to analyze the effect of injection temperature on product defects that occurred. Product as the object of the research is a standing hanger for wardrobe. Products are printed by using polypropylene material. Injection process uses injection molding manual toggle system. Injection temperature varied based on the melting temperature, namely 155, 160, 165, and 170°C. The results showed the low injection temperature of 155°C, defective products occur more dominant than the injection temperature of 160°C and 165°C and mold filled at an injection temperature of 170°C. Injection temperature under the melting temperature will result in a more dominant defect occurs. By raising the temperature above the melting temperature injection can reduce the occurrence of product defects. The defects that occur in the process of injection plastic products buffer hanger hangers for cabinets are short shot, jetting, flashing, sink marks and shrinkage.