Moulding of filled synthetic plastics moulding compositions

Details Moulding of filled synthetic plastics moulding compositions Moulding of filled synthetic plastics moulding compositions

1977-10-25

1978-09-19

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

260849, 264349, B29B 504

Patent

active

041155092

ABSTRACT:
Cured thermoset plastics artefacts, (including extrusions) are made directly from a non-homogeneous blend of a filler and a solid particulate thermosetting material, by use of a screw injection moulding machine (or screw extruder) which is operated to cause the non-homogeneous blend to plasticize or flux so that a homogeneous intimate mixture of the filler and the thermosetting material is formed in the barrel of the machine. Thus, the moulding (or extrusion) sequence includes the provision or formation of the non-homogeneous blend in the barrel.

REFERENCES:
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patent: 2936487 (1960-05-01), Paz
patent: 3078511 (1963-02-01), Street
patent: 3137038 (1964-06-01), Maynard
patent: 3194868 (1965-07-01), Shaw
patent: 3746489 (1973-07-01), Rizzi et al.
patent: 3789103 (1974-01-01), Sueyoshi et al.
patent: 3816558 (1974-06-01), Huck
Schneider et al. -- The Manufacture of Phenolic Moulding Materials by Extrusion -- Compounding-British Plastics, Nov. 1957, pp. 480-482.
Kirk-Othmer Encyclopedia of Chem. Technology, vol. 15, 6-1969, Phenolic Resins, pp. 201 & 202.
Miles et al. -Polymer Technology-Nov. 1965-Aminoplasts-pp. 52-62.
Hughes-SPE Journal-3-1970, vol. 26-Injection Molding the Ureas and Melamines . . . pp. 27-32.

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