发明名称 |
PROCESS AND APPARATUS FOR DEFORMATION OF SOLID THERMOPLASTIC POLYMERS AND RELATED PRODUCTS |
摘要 |
A process, apparatus and product related to extrusion or other deformation of solid thermoplastic polymers includes using a die or other deformation devices that have an interior passageway of changing cross-sectional shape commencing with an inlet of compact cross-section and ending with an outlet corresponding to the angular shape of the final extruded profile. The die passageway is divided into at least two consecutive stages including a first stage having an interior contour adapted to transform the polymer billet at a low deformation ratio into an intermediated cross-sectional shape proportional in shape to, but greater in cross-sectional area than, the final angular shape and a second stage having an interior contour adapted to transform the intermediate shape to the desired final shape with substantial longitudinal orientation of the polymer, but without substantial lateral shear deformation.
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申请公布号 |
CA2045871(A1) |
申请公布日期 |
1991.12.28 |
申请号 |
CA19912045871 |
申请日期 |
1991.06.27 |
申请人 |
FRANCOEUR, JACQUES R.;MORRIS, LARRY R. |
发明人 |
FRANCOEUR, JACQUES R.;MORRIS, LARRY R. |
分类号 |
B29C47/12;(IPC1-7):B29C47/12 |
主分类号 |
B29C47/12 |
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