Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling rate of movement of molding material or its...
Patent
1974-06-25
1978-10-17
White, Robert F.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling rate of movement of molding material or its...
214328, B29F 106
Patent
active
041209222
ABSTRACT:
A method and apparatus for molding are provided wherein molten molding material, such as thermoplastic or thermosetting resins, metals and the like, is flowed under pressure into a closed mold cavity and wherein the instant rate of flow and pressure of the molding material are factors determining the physical characteristics of the molded articles which are formed when the material solidifies. The process involves predeterminately varying the rate of flow of molding material to the mold cavity during a molding cycle involving charging a predetermined quantity of said molding material to the mold so as to predeterminately affect and control the physical characteristics of the article molded.
REFERENCES:
patent: 2632202 (1953-03-01), Haines
patent: 2786234 (1957-03-01), Beyer
patent: 3009203 (1961-11-01), Polete
patent: 3029471 (1962-04-01), Adams
patent: 3286302 (1966-11-01), Doering
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