Apparatus for heat-treating cast iron pipes

Details Apparatus for heat-treating cast iron pipes Apparatus for heat-treating cast iron pipes

1980-06-10

1982-07-20

Camby, John J.

Heating

Work chamber having heating means

Having means by which work is progressed or moved mechanically

1642701, 266142, 432 42, 432 62, 432130, 432133, 432239, F27B 902, F27D 1900

Patent

active

043403611

ABSTRACT:
A heat-treating apparatus for practicing a method in which when red-hot iron pipes produced by a centrifugal casting machine are cooled, the pipes are slowly cooled over the temperature range of 800.degree. to 700.degree. C. to ferritize the pipes without separately annealing the pipes. A heat-treating furnace disposed close to one end of the rotary mold of the casting machine has furnace chambers each provided with pairs of rotatable rollers for supporting the pipe in rotation to prevent the deformation of the pipe. Each of the chambers has heating burners or a cooling heat exchanger for adjusting the temperature and cooling speed of the pipe placed in the chamber. According to a preferred embodiment, the furnace chambers are separated by openable partition members of circular-arc section, and each of the chambers has turnable levers for transferring the pipe to another chamber adjacent thereto.

REFERENCES:
patent: 1471659 (1923-10-01), Helander
patent: 1525905 (1925-02-01), Anthony
patent: 1882470 (1932-10-01), Assel
patent: 2167821 (1939-08-01), Ackerman, Jr. et al.

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