Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1993-04-14
1995-09-05
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
264268, 425130, 425577, 425809, B29C 4516, B29C 4510
Patent
active
054476747
ABSTRACT:
A mold core for use in a two-component injection molding method is presented, in particular for two-component injection molding of plastic closures for bottles and similar containers. The invention solves the problem that integral mold cores, due to the configuration of the first molding, are only difficultly or not at all displaceable by a predetermined amount from the first molding, to form an intermediate space or second cavity for the injection of a second molding. The invention accounts for this in that the mold core consists of first and second sub-cores or tool elements and that one sub-core or tool element, after injecting the first substance, is displaceable by a predetermined amount relative to the first molding. After the second substance has been injected into the created intermediate space to form the second molding, a central tool element of the mold core is used as an ejector to support the deforming of the closure from the mold core.
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Ortiz Angela
Silbaugh Jan H.
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