Electroformed tooling with heat transfer fins and method for mak

Details Electroformed tooling with heat transfer fins and method for mak Electroformed tooling with heat transfer fins and method for mak

1994-01-11

1995-03-14

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Female mold including tamping means or means utilizing mold...

2281733, 2281736, 249 80, 249137, 264219, 425435, B23K 3100, B29C 4104

Patent

active

053972295

ABSTRACT:
A mold assembly for molding thermoplastic material into a solid thin shell includes a metal mold with an outer surface exposed to a heat source and an inner surface on which thermoplastic material is cast and fused to form a thin layer thermoplastic shell. A plurality of elongated generally planar fins are connected to the outer surface at predetermined spaced areas for transferring heat from the heat source to predetermined spaced areas of the inner surface. The fins are metal sheets, preferably copper, each having a discontinuous flange at one end secured to the outer surface at spaced points along the discontinuous flange. The discontinuous flange is formed by slitting or cutting one end to form spaced projections and then bending adjacent projections in opposite directions generally transversely from the elongated metal sheet. The projections arc secured to the outer surface by TIG welding.

REFERENCES:
patent: 1523021 (1925-01-01), Ladd
patent: 1754721 (1930-04-01), Linden
patent: 2370953 (1945-03-01), Greenberg
patent: 2396795 (1946-03-01), Lea
patent: 3155479 (1964-11-01), Zimmerman
patent: 3768948 (1973-10-01), Horberg, Jr. et al.
patent: 4714424 (1987-12-01), Kinugasa et al.
patent: 5032076 (1991-07-01), Jackson, Jr.

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