Plastic article or earthenware shaping or treating: apparatus – With separate and distinct upstream agitating or kneading means – With separate and distinct gas withdrawal chamber
Patent
1982-08-27
1986-10-14
Derrington, James
Plastic article or earthenware shaping or treating: apparatus
With separate and distinct upstream agitating or kneading means
With separate and distinct gas withdrawal chamber
264211, 264349, 366 76, 366 83, 425204, 425205, 425208, 425DIG39, B29B 714, B29B 718
Patent
active
046169890
ABSTRACT:
An improved process for incorporating glass fibers into a thermoplastic synthetic resin wherein the glass fibers are continuously mixed with a molten thermoplastic synthetic resin and the resulting mixture is shaped into a desired article, involves preheating the glass fibers to a temperature not more than the melting point of the synthetic resin, feeding the preheated glass fibers and the molten synthetic resin separately to a premixing chamber, intermixing the resin and fibers within the chamber and thereafter introducing the resultant premix continously and directly into a two-stage degasifying screw-type extruder for effecting further homogenization of the premix and for extruding the desired article. The two-stage degasifying screw-type extruder used for carrying out this process is provided with a screw having a constant screw pitch in the two stages and in each stage with a low pressure zone and a high pressure zone in succession.
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Mewes Heinz
Nachtigall Wilhelm
Wienand, deceased Michael
Wienand, heir by Elisabeth H. M.
Wienand, heir by Hans-Jurg W.
Derrington James
Dynamit Nobel Aktiengesellschaft
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