Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Temperature control
Patent
1993-10-08
1995-06-13
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Temperature control
264 406, 425547, 425548, 425552, B29C 4573
Patent
active
054236703
ABSTRACT:
In injection molding, a mold forms a wall member, which defines a cavity, by bringing together two mold halves. The cavity wall is formed by a specially machined cavity plate having built-in support columns, fins and ejector pins columns. The plate forms a passageway and in-out flow chambers on the opposite side from the cavity surface which completely surrounds the cavity where coolant or heating circulating carrier flows at high rates. The resulting flow of coolant/heating carrier at high rates can be controlled by special positioning of the flow chambers and creates added turbulence. The built-in support columns, fins and ejector pins also dramatically increase the area of contact of the flow carrier with the cavity plate. The design incorporates built-in support columns and fins which make possible a thinner cavity surface plate by adding strength and structural support to the cavity area. The exact arrangement and geometry of the built-in support columns, fins, and flow chamber depend on the part design and can be adjusted depending on the application to increase the uniformity and heat transfer rates. The plate design can be adapted to movable cores and stationary mold cavity cores.
REFERENCES:
patent: 3733161 (1973-05-01), Nussbaum
patent: 5055025 (1991-10-01), Muller
patent: 5061174 (1991-10-01), Gellert
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