Barrel wall conduit arrangements for a plastic processing screw

Details Barrel wall conduit arrangements for a plastic processing screw Barrel wall conduit arrangements for a plastic processing screw

1996-12-30

2000-06-13

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Optical fiber, waveguide, or preform

264 128, 264 451, 26417113, 26417114, 26417215, 26417316, 264211, 26421121, 26432817, 26432818, 264572, 264573, 425113, 425130, 4251331, 425207, B29B 742

Patent

active

060745789

ABSTRACT:
The invention comprises a plasticating machine for the working and forcing of plastic material into a mold, the machine including an elongated barrel housing having a first or proximal end and a second or distal end, and an elongated screw shaft with a screw flight therearound, the screw shaft being rotatably supported in the elongated barrel housing, for the working of plastic between the screw shaft and the elongated housing. At least one delivery conduit is generally longitudinally arranged within the wall of the housing. The delivery conduit with the housing wall may be arranged to heat or cool the screw and any plastic being worked therethrough. In a further embodiment, it may permit delivery of a medium within the wall, from an upstream location of the housing, into the primary flow path of any plastic being driven from the machine and into a mold.

REFERENCES:
patent: 3782870 (1974-01-01), Schippers
patent: 4467969 (1984-08-01), Godfrey et al.
patent: 4548776 (1985-10-01), Holdredge, Jr.
patent: 4730935 (1988-03-01), Kolossow
patent: 4774047 (1988-09-01), Nakamura et al.
patent: 4783292 (1988-11-01), Rogers

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