Problem Occur during Injection Moulding Parts

Injection Moulding is considered to be one of the manufacturing processes for mass production of plastic products 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 used to constructed 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. If tool design properly it effects the quality of the compound .It can lead to shrink marks, pore finish, short shots, wrapping, and bubbles formation in parts .Such problem arises when injection mould is not design properly. This research used the experimental design of Taguchi method to determine the injection moulding conditions, and the injection processes were simulated using the commercial software C-MOLDTM. Both moulding process conditions and factors were discussed regarding the degree of warpage of a thin shell part. The results showed that the packing pressure had the greatest influence on the warpage, followed by mould temperature, melt temperature, and packing time. Plastic injection moulding comprises plastication, injection, packing, cooling, and ejection and process/part quality control applications. These steps are followed for the parts, which are designed by CAD & to be produced by plastic injection method. This paper deals with the literature review on study of application of the taguchi method. The Taguchi robust parameter design has been widely used over the past decade to solve many single response process parameter designs. Taguchi optimization method was used by exploiting mould analyses based on two level factorial designs.