Research And Development Of Automatic Parting Generation System In Injection Mould Design Based On NX

Due to that the plastic can be made into complex, high precision, lightweight, corrosion-resistant products, plastic products have been applied to an increasing number of field with the continuous development of plastic industry. The vast majority of plastic products are made by the method of injection molding. The injection mold design and manufacture is a complex and difficult process of control. Forming of the design and manufacture of molding parts is a direct impact on the cost of injection mold. A wrong parting direction, parting line and parting surface design may even cause a result of the failure of injection die design directly. Only rely on the experience of designers and craft workers die, to ensure the high efficiency of the design and manufacture, as well as the requirements of high-quality of the injection mold is very difficult. And it's too hard to keep the competitiveness to supply the demand in today's society.In recent years with the accelerating industrialization, automatic, intelligent CAD system, there are many research results in particular pieces of the automatic generation of parting direction, parting line and parting surface. The current study focused on three aspects. The first one is using certain rules to convert the size of the model of injection molding product to the size of molding parts. And the second is determining parting direction, parting line and parting surface automatically through their physical meaning and the geometric characteristics of injection molding product. The last one is automatic generation of the corresponding parts forming using existing knowledge. However, so far there is no mature automatic parting generation technology that can apply to most of the injection molding parts.The author make use of previous theoretical knowledge and develop an automatic parting generation system in injection mold design based on UG. The system classify the surfaces of the mold into convex parting surfaces, concave parting surface and those uncertain surfaces that between those two types. Find the best parting direction and parting lines in accordance with undercut, through-hole and other characteristics that impact on parting generation. Through the technology of fill face, suture techniques, complete the automatic parting generation ultimately. The system only needs users to provide product model. It is very intelligent and it greatly reduce the requirement of the mold designers.