Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling fluid pressure in direct contact with molding...
Patent
1982-05-07
1984-10-23
Czaja, Donald E.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling fluid pressure in direct contact with molding...
264 401, 264 404, B29F 306
Patent
active
044787758
ABSTRACT:
A method of extruding and shaping thermoplastic material in which a constant amount of thermoplastic material is continuously fed from a screw extruder to a die by means of a metering pump. The extruder is arranged to continuously receive a constant amount of the thermoplastic material. The metering pump is adjusted to the correct rotational frequency to maintain the pressure of the molten thermoplastic material between the extruder and the metering pump within a predetermined range.
REFERENCES:
patent: 4171193 (1969-10-01), Rahlfs
patent: 4209476 (1980-06-01), Harris
Endo Gen
Hori Hirokazu
Kawada Yoshihiro
Sakai Junzo
Becker Mary A.
Czaja Donald E.
Sekisui Kagaku Kogyo Kabushiki Kaisha
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