Direct fabrication

Details Direct fabrication Direct fabrication

1991-02-14

1992-07-14

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

26432817, 26432819, 26433113, 26433118, 26433119, 26433121, 264537, 425208, B29C 4547, B29C 4550, B29C 4560

Patent

active

051300761

ABSTRACT:
Melt fabrication, with precompounding, of a plurality of thermoplastic resins, is provided by use of a screw having a dispersion section in such machines as injection molding machines. The minor resin component can be an elastomer, which toughens the resin's major component. This effect is improved by increasing back pressure on the screw used in the injection molding machine, to extend the screw rotation and thus shear time accomplished by the dispersion section.

REFERENCES:
patent: 4172859 (1979-10-01), Epstein
patent: 4174358 (1979-11-01), Epstein
patent: 4770837 (1988-09-01), Lu et al.
patent: 4784819 (1988-11-01), Spurr
patent: 4908169 (1990-03-01), Galic et al.
patent: 5013233 (1991-05-01), Semmekrot
patent: 5026512 (1991-06-01), Chang

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