Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling heat transfer with molding material
Patent
1980-12-08
1982-03-16
Mayewsky, Volodymyr Y.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling heat transfer with molding material
219311, 219438, 219441, 219328, 264295, 264322, 264339, 219439, 219530, 219535, 432 10, B29C 1702
Patent
active
043200770
ABSTRACT:
The method and apparatus disclosed herein provide a stratified heat bath for use in the heating stage of thermoplastic deformation. It allows for heating of central sections of the thermoplastic lengths in order to render said lengths susceptible to deformation without heating the end sections or tangents of said lengths, permitting the ends to retain their original shape. In the case of tubular lengths, such as lengths of PVC pipe, the invention provides for more rapid heating than in the prior art.
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