Failure analysis injection molds to improve product quality standard with FMEA

Abstract

Plastic material is a material that is widely used by humans in everyday life such as food wrappers, drinks, molds and so on. Along with economic development, plastic is now even starting to be used in industry as one of the components to replace metal as the main material in a defense (Alutsista). Injection molding is a process of melting thermoplastic material that is melted in a mold. Injection molding plays a very important role in the plastic industry today, where every industry expects a product to have the best quality with a high and efficient production rate. From the research that has been done to improve product quality from injection molding results is to use the root cause analysis method or process that has occurred before. Improving product quality by conducting trials of injection melting temperature settings, where the parameters made constant are injection pressure, cooling time, and mold temperature. Usually, the lower the melting temperature setting, the more defects such as short mold, dirty, yellowish. In this process the author plunges into field production directly using various machines but the author decides to take samples of SE50EV- and Shell Connector machines to identify the types of rejects that often occur during the process. During the process, reject samples will be collected to examine how many and what types of rejects often occur in the company.This test is carried out by giving the same treatment to each sample to be tested, only the amount of injection is different. And this process is also carried out to find the optimal parameters for testing parameters against NG rejects that affect the product.