Problem Occure during Manual Blending & Feeding in Injection Moulding Process

Injection moulding process is a manufacturing process which produces plastic parts from both thermoplastic and thermosetting plastic materials. Material is feed into a heated barrel, mixed, and forced into a mould cavity by a reciprocating screw or a ram injector, where it cools and hardens to the configuration of the mould cavity The mould is usually constructed using either steel or aluminium, and precision-machined to form the features of the desired part. Injection moulding is widely used for manufacturing a variety of parts, from the smallest component to entire body panels of cars. The manufacturing trends of producing a plastics product in injection molding industries are recently changing from traditional method to using the FEA analysis. For injection molding industries, time and cost is very important aspects to consider because these two aspects will directly related to the profits at a company. The next problem is to consider, getting the best parameter for the injection molding process, plastics has been waste. Through the experiment, operator will use large amount of plastics material to get the possibly parameters to setup the machine. To produce the parts with better quality and quantity these moulding defects are the major obstacles in achieving the targets with quality & quantity. Various defects like Short shot, colour streaks and low productivity rates are associated with the material mixing and feeding as molded plastics are often a blend of two or more materials. Colors (master batch) and other additives are often mixed (blended) with the raw plastic material prior to the molding process in molding plants. So it is very important to work out auto blending and auto feeding of plastic granules to the machine hopper. This paper will cover the study of automatic blending unit & central conveying system for plastic granule feeding to machine & will help in optimizing the injection molding process.