Method for forming tubular plastic articles

Details Method for forming tubular plastic articles Method for forming tubular plastic articles

1978-05-25

1981-01-20

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264348, B29C 700

Patent

active

042462258

ABSTRACT:
A method and apparatus are disclosed for injection molding tubular plastic articles around cylindrical core pins at a molding station, for cooling the articles while supported on the core pins, and for then axially stripping the articles from the core pins at an ejection station. The article stripping step is accomplished by a horizontally reciprocable carriage which is selectively moved into and out of vertical alignment with a set of core pins and molded articles positioned at the ejection station. Sectional gripping members on the carriage are radially closable when in alignment with the molded articles, to grasp the articles for their axial removal from the core pins upon the horizontal displacement of the carriage. The stripped articles may be held in a horizontal cantilever position between the gripping members during an operational dwell time for additional cooling subsequent to their removal from the core pins.

REFERENCES:
patent: 3655317 (1972-04-01), Funkhouser et al.
patent: 3707591 (1972-12-01), Chalfant
patent: 3853451 (1974-12-01), Bendrick

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