Richard J Schock

US Patent:

56310307, May 20, 1997

Filed:

May 5, 1995

Appl. No.:

8/435683

Inventors:

Charles J. Brun - Xenia OH
Richard J. Schock - Miamisburg OH

Assignee:

Electra Form, Inc. - Vandalia OH

International Classification:

B29C 4906
B29C 4964

US Classification:

425526

Abstract:

An integrated plastic injection mold and blow mold machine includes an injection mold assembly having a cooled exterior mold assembly connected to a plastic injector for injecting plastic. A cooled core assembly is positionable within the cooled exterior mold assembly to define a mold cavity for accepting injected plastic from the plastic injector to form a parison. To allow transfer of the parison to a blow mold assembly, the cooled core assembly is movable with respect to the cooled exterior mold assembly. A thread split holds the parison and is used to first form the neck of a parison, and then move the parison from the injection mold assembly to the blow mold assembly. In addition, the parison is formed by use of a removable cooled core that is movable with respect to the thread split. The removable cooled core accommodates a poppet valve through which air can be introduced to facilitate separation of the parison from the removable cooled core while still leaving the parison held in position by the thread split. The poppet valve is cooled through direct or indirect contact with a cooling medium so that the head of the poppet valve and the plastic adjacent thereto is adequately cooled.

US Patent:

57501610, May 12, 1998

Filed:

May 5, 1995

Appl. No.:

8/435699

Inventors:

Richard J. Schock - Miamisburg OH
Charles J. Brun - Xenia OH

Assignee:

Electra Form, Inc. - Vandalia OH

International Classification:

B29C 4503

US Classification:

425468

Abstract:

A mold core assembly for removable installation in a molding machine includes a first lock element attached to a core and a second lock element movably attached to a core retainer. The second lock element is movable between a locked position fitted in locking connection with the first lock element and an unlocked position separated from the first lock element. A slip ring surrounds the first lock element of the core, engaging and holding the second lock element in its locked position. A spring is connected between the core retainer and the slip ring, with the spring biased to oppose movement of the slip ring away from its locked position so that the core is normally held in its locked position in the core retainer.