Flexible mold including rigid encapsulated mandrel

Details Flexible mold including rigid encapsulated mandrel Flexible mold including rigid encapsulated mandrel

1975-04-28

1977-06-07

Husar, Francis S.

Static molds

Container-type molding device

And an inner removable core to form recess or opening

249177, 264313, 425DIG44, 425440, B28B 716, B28B 728, B29C 106

Patent

active

040278450

ABSTRACT:
An apparatus for molding articles free of seams and parting lines including a one-piece flexible mold which is deformable and which includes a rigid core member, and a vacuum pot which is used to cause the mold to expand radially outwardly to allow the molded article to be released. The core member may comprise a rigid central mandrel which is rigidly embedded in the bottom wall of the mold and which is hollow and includes ports such that a pressurized catalytic gas may be injected into the mold material to cause a bonding agent to set.

REFERENCES:
patent: 3008205 (1961-11-01), Blaies
patent: 3171169 (1965-03-01), Graef
patent: 3196777 (1965-07-01), Luker
patent: 3776683 (1973-12-01), Putzer et al.
patent: 3815863 (1974-06-01), Andeweg
patent: 3883109 (1975-05-01), Hahne

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