Injection mold for molding internally threaded plastic article

Details Injection mold for molding internally threaded plastic article Injection mold for molding internally threaded plastic article

1976-12-30

1977-11-22

Flint, Jr., J. Howard

Static molds

Forming receptacle and disparate portion, e.g., cup and...

249 59, B29D 1500, B29F 114

Patent

active

040592499

ABSTRACT:
A core for the injection molding of plastic articles having internal threads, provides a means for readily releasing the article from the mold. The core has a non-rotating, water-cooled center section to hold the molded article against rotary motion and a driven, water-cooled ring section for molding threads in the article. Rotation of the ring section coupled with the holding action of the stationary center section releases the molded thread and ejects the article from the core by the axial force of the thread of the core bearing against the molded thread of the article.

REFERENCES:
patent: 3091810 (1963-06-01), Turner
patent: 3289252 (1966-12-01), Bromley
patent: 3314639 (1967-04-01), Barnett
patent: 3481000 (1969-12-01), Barfuss
patent: 3660001 (1972-05-01), Roehr
patent: 3776676 (1973-12-01), Kessler
patent: 3905416 (1975-09-01), Hammer
patent: 3940103 (1976-02-01), Hilaire

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