Segmented hot molding apparatus

Details Segmented hot molding apparatus Segmented hot molding apparatus

1990-12-05

1992-05-26

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to heat or cool

249 78, 249144, 249152, 249170, 425589, 4254519, B29C 4537

Patent

active

051162180

ABSTRACT:
Molding apparatus, for example for molding components of polymerized resin without drawing, comprises a mold defined by a mold wall having a first thermal expansion coefficient, and a die including a die wall having a second thermal expansion coefficient greater than the said first coefficient, a molding operation being carried out by inserting the die into the mold at a first temperature, heating the die and the mold to a second temperature higher than the first temperature, and subsequently cooling the die and the mold after a component has been molded. In accordance with the invention, the die wall includes a plurality of separate sectors which are pivotally mounted on a common support member and which are arranged and dimensioned such that, at the second temperature, the radially outer faces of the sectors adjoin one another contiguously to define the molding face of the die wall.

REFERENCES:
patent: 3148414 (1964-09-01), Boggs et al.
patent: 3801059 (1974-04-01), Lippold
patent: 4761130 (1988-08-01), Peters
patent: 4984976 (1991-01-01), Kozachevsky et al.

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