Blow molding method

Details Blow molding method Blow molding method

1976-08-23

1978-08-01

DiPalma, Victor A.

Metal working

Method of mechanical manufacture

Obtaining plural product pieces from unitary workpiece

29453, 264150, 264152, 264 98, B23P 1700, B29H 704

Patent

active

041034112

ABSTRACT:
Method and apparatus for blow molding double-walled containers from thermoplastic polymers in which the inner and outer container parts are simultaneously molded in a single tandem mold in the same molding cycle to produce special single-piece molded container intermediates. The intermediate is then cut apart along specially provided cut lines to provide a continuous inner container and a multipiece outer container in which the inner container nests. Loose, molded or batt-type insulation may be employed in annular space between the outer shell and the inner container. The outer container parts, bottom and top, are designed to snap-fit together. A carrying or pouring handle may optionally be molded into the outer shell part, or spout to the inner, or they may be added as separate pieces.

REFERENCES:
patent: 3004285 (1961-10-01), Hagen
patent: 3198375 (1965-08-01), Hunter
patent: 3214830 (1965-11-01), Piker
patent: 3295706 (1967-01-01), McKeekin
patent: 3304603 (1967-02-01), Piker
patent: 3428722 (1969-02-01), Chittenden et al.
patent: 3457590 (1969-07-01), Dittmann
patent: 3862698 (1975-01-01), Hafele

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