Method for blow molding plastic articles

Details Method for blow molding plastic articles Method for blow molding plastic articles

1974-12-19

1976-11-23

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

Work is organic material

264 98, 264327, 425326B, 425DIG214, 425DIG215, 425DIG216, B29C 1707

Patent

active

RE0290459

ABSTRACT:
A method of blow molding plastic articles in two blowing stages. A freely extruded pendant tubular parison is first blown into a pre-form, then the pre-form, while at the temperature most conductive to orientation, is blown to its final configuration. By performing certain operations on the pre-form prior to the final blowing step, improved products can be made. For example, by pinching shut a portion of the pre-form, handled containers can be made on a free extrusion blow molding machine. By stretching the pre-form prior to final blowing, containers of increased top-load or stacking capabilities can be made.

REFERENCES:
patent: 2715751 (1955-08-01), Weber
patent: 2919462 (1960-01-01), Friden
patent: 3277223 (1966-10-01), Curto
patent: 3311684 (1967-03-01), Heider
patent: 3390426 (1968-07-01), Turner et al.
patent: 3399424 (1968-09-01), Sheptak
patent: 3439380 (1969-04-01), Seefluth
patent: 3579620 (1971-05-01), Pettersson

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