Integrated vacuum forming/reaction injection molding apparatus f

Details Integrated vacuum forming/reaction injection molding apparatus f Integrated vacuum forming/reaction injection molding apparatus f

1989-08-30

1991-12-24

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

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

Female mold type means

425127, 425543, 425546, B29C 4514, B29C 4516

Patent

active

050747703

ABSTRACT:
An apparatus is provided for the integrated vacuum forming/reaction injection molding of a shaped polymeric laminate article, e.g., an item of sanitary ware such as a bathtub or a motor vehicle body panel, possessing a vacuum formed thermoplastic resin cosmetic layer bonded to a thermoset resin backing layer. In a preferred embodiment, the exposed surface of a vacuum formed preform is treated within the cavity of a sealed reaction injection mold, e.g., by plasma or chemically reactive gas, to modify the polymeric structure of the resin at such surface without affecting the bulk properties of the resin and thereby improve the adherent property of the preform for the subsequently formed theremoset resin layer.

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