Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Corrugating
Patent
1986-07-07
1989-04-11
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Corrugating
264514, 264564, 264143, 2641771, 26421121, 264349, 264DIG69, 425205, 425209, 4253823, B29C 4700
Patent
active
048204692
ABSTRACT:
Method and apparatus are disclosed for producing various materials and products of a thermoplastic nature. In the method, thermoplastic material is subjected to a high intensity mixing and melting step to form a material which is a non-flowable and self-sustaining mass, having a temperature low enough to prevent it from being readily flowable, in a subsequent step, the method involves placing the material between a fixed rigid surface and a moving rigid surface to force air from the mass and to densify, compress and convert it to a flowable form whereafter it is passed through a restricted opening. There is provided a combination of a high intensity mixer and melter in which the product produced is then fed into a gear-pump where the material is passed between a fixed rigid surface and a moving surface. Higher output speeds can be obtained using the method and apparatus compared to conventional extrusion techniques; in addition, materials not readily processable by conventional extruding operations can be processed.
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Maury Eufredo G.
Walsh Martin J.
Colortech Inc.
Thurlow Jeffery
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