The Research For The Plastic Profile Extrusion Die's Computer Aided Analysis System

With the popularization of plastic door-window's application ,people demand high quality plastic profile.The plastic profile extrusion die is very important to the quality of plastic profile,so the CAA system of the plastic profile extrusion die can be of great significant to improve the producing efficency and it's quality.Imitating the shaping process with computer is a kind of very comprehensive technology . Based on the analysis of the die structure in the extrusion of plastic profile and the theory of polymer theology,the paper established the mathematic models for calculating the pressure drop and melt residencre time in different parts of the die's flow path. The cooling system of calibrating mould was also set up. At last ,the stress exerted on the flow divider holder and binding bolds of the core was analysised and the formula for strength correction was established and the program of CAA for the plastic profile extrusion die was compiled by VBA language based on AutoCAD.