Design and Fabrication of an Injection Moulding Tool for Cam Bush with Baffle Cooling Channel and Submarine Gate

摘要

This research works is focused on design and fabrication of an automatic injection moulding tool for production of CAM BUSH which is used in electrical engines as a connector. An injection mould is a tool which is used for production of plastic components in large numbers in a short span of time. The moulding tool consists of the Top plate, Cavity plate, Core plate, Spacer blocks, Ejector plate and the Bottom plate. In this work, six core pins and six ejector pins are provided on injection mould because the required cam bush has six indexing holes. The material, Oil Hardened Non-shrinking Steel (OHNS) for the core and cavity, EN353 for the guide pillar, guide bushes, core pins, ejector pins, locator ring and the sprue bush and Mild Steel for other plates are selected. The elements of injection moulding tool have been designed, fabricated and assembled. Submarine gate and Baffle circular hole cooling system has been provided in the moulding tool to increase the productivity and good surface finish. The required Nylon-66 Cam bush component is produced with this moulding tool by properly controlling the various parameters of injection moulding machine.