Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se – Utilizing surface to be reproduced as an impression pattern
Patent
1973-06-28
1976-06-01
White, Robert F.
Plastic and nonmetallic article shaping or treating: processes
With step of making mold or mold shaping, per se
Utilizing surface to be reproduced as an impression pattern
264226, 264254, 264255, 264261, 264277, 264278, 264317, B29C 108, B29D 3100
Patent
active
039610101
ABSTRACT:
A method of manufacturing a heat exchanger comprises temporarily suporting a number of tubes in a first mould using a plurality of removable tube plates. The first mould is then filled with a molten, low melting alloy. After the alloy has set, the assembly is removed from the first mould and the tube plates are disintegrated by solvent or chemical action. The assembly of tubes supported by the set alloy is then inserted into a second mould and plastic material is injected into the mould to form a thin shell around the tubes and alloy and may also form header tanks of the heat exchanger. Finally, the whole assembly is removed from the second mould and the alloy is melted out to leave the completed heat exchanger. The method is also applicable to the manufacture of other hollow articles having a complex internal configuration.
REFERENCES:
patent: 3255280 (1966-06-01), Burrowes
patent: 3529054 (1970-09-01), Hepner
patent: 3730959 (1973-05-01), Horres et al.
Hoag W. E.
Serck Industries Limited
White Robert F.
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