Injection molding techniques utilizing fluid channels

Details Injection molding techniques utilizing fluid channels Injection molding techniques utilizing fluid channels

2005-01-18

2005-01-18

McDowell, Suzanne E. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

C264S572000, C428S035700, C428S318600, C428S318800, C428S319300

Reexamination Certificate

active

06843954

ABSTRACT:
The present invention provides processes and an apparatus for injection-molding an article with a fluid channel formed therein. The process includes providing at least first and second resin streams within a mold cavity, causing the flow fronts (16) of the resin streams to meet at a longitudinal point in the mold cavity to form a first layer of solidified resin on a peripheral surface of the mold, the first layer having a knit line (20) at the longitudinal point where the resin streams meet; and introducing a fluid into the molten resin in the mold to form a fluid channel (50) and a second layer (32) of solidified resin, the second layer between the fluid channel and the first layer of solidified resin, wherein the second layer is devoid of a knit line at the longitudinal point in the mold cavity where the first and second flow fronts meet.

REFERENCES:
patent: 3873656 (1975-03-01), Garner et al.
patent: 4025686 (1977-05-01), Zion
patent: 5169648 (1992-12-01), Eckardt et al.
patent: 5277462 (1994-01-01), Verzelli et al.
patent: 5387391 (1995-02-01), Satoh et al.
patent: 5637328 (1997-06-01), Shah et al.
patent: 5728410 (1998-03-01), Hendry
patent: 5855840 (1999-01-01), Cucheran et al.
patent: 6068424 (2000-05-01), Wycech
patent: 19703291 (1998-03-01), None
patent: 0 6285911 (1994-10-01), None
patent: 0 688 652 (1995-12-01), None
patent: 0 773 096 (1997-05-01), None
patent: 0 949 053 (1999-10-01), None
patent: 2 087 299 (1982-05-01), None
patent: 58 042441 (1983-03-01), None
patent: 04 293638 (1992-10-01), None
patent: 5-57741 (1993-03-01), None
patent: 06 312437 (1994-11-01), None
patent: 10 15981 (1998-01-01), None
patent: WO 9824610 (1998-06-01), None
patent: WO 9834771 (1998-08-01), None
patent: WO 9839150 (1998-09-01), None
patent: WO 0112411 (2001-02-01), None
Rusch K.C., Gas Assisted Injection Molding—The New Thermoplastic Molding Technology for Exterior Body panels Plastics in Automobiles. Bumper Systems, Interior Trim, Instrument Panels, and Exterior Panels. Detroit Feb. 27-Mar. 3, 1989, International Congress and Exposition, Warrendale, SAE, US, pp. 155-162.

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