Method for forming smooth handle

Details Method for forming smooth handle Method for forming smooth handle

1992-03-19

1993-07-27

Aftergut, Karen

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

249160, 249170, 264302, 264310, 264318, 264334, B29C 4118, B29C 4142

Patent

active

052308553

ABSTRACT:
A method for forming a 360 degree integral skin handle in a thermoplastic part for use in automotive trim products includes the steps of forming a mold with a partial recess with raised side ribs joined to a removable plug with raised side ribs and thereafter selectively directing heat from a first source through the mold and from a second source through the plug to form a completely closed, curved, heated tube surface and thereafter casting thermoplastic material against the curved, heated tube surface to fuse and cure a layer of material thereon in the form of a tube skin segment which is releasable from the mold when the plug is removed. Apparatus for practicing the method includes a mold with a recess therein and a plug is supported on the mold for movement into a position for closing the tube surface and into a demolding position for releasing the molded part. The raised side ribs combine to form spaced parallel recesses in the tube to form an inner surface on a 360.degree. with a smooth feel. The article formed by the method and apparatus includes a shell of thermoplastic material which is fused and cured and which includes a generally planar segment having an integrally formed tubular segment thereon for defining the outer skin surface of a full 360 degree handle with no raised, rough feel parting lines therein.

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