Machinery for molding headpiece for collapsible tube including a

Details Machinery for molding headpiece for collapsible tube including a Machinery for molding headpiece for collapsible tube including a

1981-12-01

1985-01-08

Thurlow, Jeffery

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Extrusion shaping means

264260, 264268, 425114, 425120, 425125, 425132, 4251331, 425308, 425325, 425378R, 425523, 425531, 425532, B29F 308

Patent

active

044925484

ABSTRACT:
A headpiece for a collapsible tube is a unitary member made up of two different plastics, each plastic providing a different property for the headpiece. The headpiece is formed by extruding on top of one another a first torus like annulus of a first plastic and a second torus like annulus of a second plastic. The two plastic annuli are simultaneously molded to form the headpiece. One plastic forms, primarily, the outer portion of the headpiece and the other plastic forms, primarily, the inner portion of the headpiece.
The machine for molding the plastic head includes a work table rotatably indexed from station to station at which various operations are performed. The mandrel which holds the cylindrical body, to which the head is molded, is movable from an inboard position to an outboard position so that operations can be performed relative to it. The molding operation is performed at the inboard position. The loading, extruding, capping and ejection operations are performed at the outboard position. The nozzle of the plastic extruder includes a chilled wiper for wiping an extruded plastic annulus into the mold cavity.

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patent: 3260411 (1966-07-01), Dobson
patent: 3313875 (1967-04-01), Magerle
patent: 3330006 (1967-07-01), Jenkins
patent: 3452687 (1969-07-01), Kaneko et al.
patent: 3457337 (1969-07-01), Turner
patent: 3565293 (1971-02-01), Schultz
patent: 3874834 (1975-04-01), Arechaval et al.
patent: 4185757 (1980-01-01), Schultz

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