The Computer Aided Design Of The Key Parts In Plastic Profile Extrusion Die

With the development of the plastic door-window industry, more high quality of plastic profiles is required. The plastic profile extrusion die is very important to the quality of plastic profile. There is a gap of die quality to some extent between home and abroad, manly because of the differences in design technology. How to combine the experience with the theory in profile die design and establish a effective extrusion die CAD system is always a important project in the research of extrusion die.Research of the key parts in extrusion die was based on the theory of rheology of the polymer melt and the thermodynamics, the paper established the mathematic models for the design of the key parts in extrusion die. According to the model, with the VBA language based on the AUTOCAD2000,the formula was compiled to a program mould which was connected to the EX-MOULD system. At last, the software of FLOW2000 was applied to the complicated parts in the extrusion die to simulate the real flow in the extrusion channel, which is a exploration of the accurate design for extrusion die.