Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Positioning of a mold part to form a cavity or controlling...
Patent
1984-06-26
1989-09-05
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Positioning of a mold part to form a cavity or controlling...
2643281, 425149, B29C 4577
Patent
active
048636517
ABSTRACT:
A compression molding method includes detecting actual internal die pressure of molding material filled into a mold cavity, and regulating the compressive force exerted on the molding material in the mold cavity so as to conform the detected internal die pressure with a predetermined reference internal die pressure. The compressive force exerted on the molding material is controlled by a mold clamping mechanism or an extruder in accordance with the prescribed reference internal die pressure given in the form of a waveform, thereby to keep the actual internal die pressure of the molding material in the optimum condition. Consequently, molded products of high quality can be produced continuously.
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patent: 4066725 (1978-01-01), Boetner
patent: 4349324 (1982-09-01), Neff et al.
patent: 4359435 (1982-11-01), Kogure
Fertig Mary L.
Silbaugh Jan H.
Techonoplas, Inc.
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