The form of closed before the direction of the, method and the die system for the production of large injection molded articles with the use of very large closing forces and thus equipped injection molding machine

摘要

This improvement relates to a novel method of injection moulding and novel equipment which enables manufacturing of products of very large shapes usually requiring extremely high clamping forces to be generated by means of expensive hydraulic equipment systems. This requirement appeared to be the technical restriction for making such large products. The improvement also provides for a method of mould assembling when products are shaped in such a way that any removal of the product from the mould would be prevented by the complexity of its external/internal shape. The required extremely high clamping forces are now performed and maintained during the injection molding process simply by previously positioning various mould sections themselves by means of supports in heavily dimensioned strong holding means while use is made of rather common and simple hydraulic means. Moulding forces which are generated during the injection moulding process can be fully absorbed by the heavily dimensioned holding means which keeps the entire mould circumferentially enclosed as if held by a massive fist grip.