Compression molding apparatus with quick change molds

Details Compression molding apparatus with quick change molds Compression molding apparatus with quick change molds

2007-01-23

2007-01-23

Gupta, Yogendra N. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

For press shaping surface

C425S195000, C425S345000, C425S398000, C425S418000, C425S809000

Reexamination Certificate

active

10862981

ABSTRACT:
Compression molding apparatus for molding plastic closures for containers includes a rotary turret having a vertical axis and supporting circumferentially spaced and axially moveable opposing plungers each carrying a compression mold member. Each mold member is attached to its corresponding plunger by a quick change locking coupler including a cylinder with circumferentially spaced holes supporting balls for radial movement. Each mold member has an axially projecting stud with an enlarged head portion projecting into the cylinder, and a cup-shaped piston surrounds the cylinder and has a recess for receiving the balls in a released position. A spring urges the piston to a locked position with the balls engaging the stud, and a housing is recessed within the plunger to support the piston for axial movement against the spring to a released position in response to pressurized fluid received within the housing through a passage within the housing and plunger.

REFERENCES:
patent: 4343754 (1982-08-01), Wilde et al.
patent: 4497765 (1985-02-01), Wilde et al.
patent: 5557999 (1996-09-01), Smith et al.
patent: 5692851 (1997-12-01), Pace
patent: 6074583 (2000-06-01), Ingram

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