Injection molding machine with non-intermeshing twin screw compo

Details Injection molding machine with non-intermeshing twin screw compo Injection molding machine with non-intermeshing twin screw compo

1997-09-29

1999-08-31

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

With separate and distinct upstream agitating or kneading means

Plural means being diverse, or parallel and intermeshing or...

425542, B29C 4500

Patent

active

059451335

ABSTRACT:
A compounder feeder for mixing and then injecting materials such as polymers and glass fibers into a female die mold includes first and second parallel screws which have interengaging spur gears and external mixing discs, the mixing discs of one screw not engaging the mixing discs of the second screw, a drive motor for rotating the first screw and a drive cylinder for moving the second screw axially toward and away from the female die mold to inject mixed material directly therein.

REFERENCES:
patent: 4802140 (1989-01-01), Dowling
patent: 5108188 (1992-04-01), Peter et al.
patent: 5415473 (1995-05-01), Nakano et al.
D. Bigio et al., "Starve-fed Flow in Co-Rotating Twin Screw Extruders," Intern. Polymer Processing VII (1992) 2, pp. 111-115.
D. Bigio et al., "Mixing in Non-Intermeshing Twin Screw Extruders," Intern. Polymer Processing VI (1991) 2, pp. 172-176.
R.J. Nichols et al., "Compounding Glass-Fiber Reinforced Nylon," Plastics Compounding, vol. 9, No. 4, (Jul./Aug. 1986).
Robert Jerman, "A Mathematical Model for Non-Newtonian Melt Flow . . . in Non-Intermeshing Twin Screw Extruders," SPE Antec (1986), pp. 99501001.
Carl Hagberg et al., "Scaleup of Dispersive Mixing Cylindrical Compounders in CRNI Twin Screw Extruders," SPE Antec (1995), pp. 333-339.

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