Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – Plural mold cavities
Patent
1991-06-10
1992-09-08
Hoag, Willard
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
Plural mold cavities
425589, 4254501, 425451, B29C 4504, B29C 4528
Patent
active
051453533
ABSTRACT:
A molding press for simultaneously operating a pair of molds, each having a pair of mold sections (M1, M2; M3, M4), including a base for mounting two horizontally displaced mold sections (M1, M3), each constituting one section of one of the pair of molds, a first bolster for mounting a mold section M2) in alignment for mating engagement with one mold section M1) on the base, a second bolster for mounting a mold section (M4) in alignment for mating engagement with the other mold section (M3) on the base, rod assemblies for interconnecting the first bolster and the second bolster in fixed space relation, for guiding relative movement between the base and the bolsters during opening and closing of the pair of molds, and for mounting pistons operatively interrelated with cylinder assemblies on the base, and an auxiliary cylinder assembly for effecting relative movement between the base and the bolsters for opening of one of the pair of molds while closing the other of the pair of molds and vice versa. The pistons may be provided with fluid transfer bore for selectively providing for relative displacement between the pistons and fluid in the cylinder assemblies.
REFERENCES:
patent: 2555476 (1951-03-01), DuBois et al.
patent: 3671162 (1972-04-01), Lohmann
patent: 3707342 (1972-12-01), Lohmann
patent: 4203359 (1980-05-01), Baltschun
patent: 4408981 (1983-10-01), Brown
patent: 5052915 (1991-10-01), Schad et al.
patent: 5055250 (1991-10-01), Schad et al.
Hoag Willard
The Dow Chemical Company
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