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Research of Function Block Structure in Plastic Profile Extrusion Die CAD System

Author: FengLin
Tutor: ZhuYuanJiï¼›CaoShiZuo
School: Hefei University of Technology
Course: Materials Processing Engineering
Keywords: Profile extrusion die The flow channel of the die Function Block Finite Element
CLC: TP391.7
Type: Master's thesis
Year: 2002
Downloads: 43
Quote: 2
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Abstract


With plastic windows and doors in China 's rapid development , the quality of the product profiles have become increasingly demanding , which profiles extrusion mold design put forward higher requirements . Function blocks die die is a subsidiary of the main profile , but its main profiles melt flow as well as the profile of the overall quality of die but would have a negligible impact . The cross-sectional shape of the function block structures are generally more complex , it has not formed a general mathematical model to calculate the design often depending on the circumstances , with the previous design experience to design , which often form the extrusion die design defects , larger repair modulus . Also caused a lot of difficulties to further improve the quality of the extrusion die . Therefore , it is necessary to explore a more accurate and efficient function block design , function block design more scientific and reasonable . This thesis is the study of the function block structure , based on the melt rheology and fluid dynamics theory based on the numerical simulation of the melt in the die , to calculate the flow parameters of the melt in the die ( mainly velocity distribution ), thereby to optimize the geometry of the functional block can scientifically . In this paper, based on existing theories , first start from the melt flow control equation using the Galerkin weighted residual method is the finite element analysis , finite element equation derivation summed melt flow , then programming to complete the equation solving . After completing the above steps , the process used in the extrusion die function block structure design calculations to explore a functional block to design a new type of process . Extrusion die CAD system will provide a more effective way function block design .

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