Electric heating or preheating furnace particularly for lining c

Details Electric heating or preheating furnace particularly for lining c Electric heating or preheating furnace particularly for lining c

1999-09-29

2000-12-05

Hoang, Tu Ba

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

373109, 219420, F27D 1100

Patent

active

061570044

ABSTRACT:
A heating or preheating furnace for lining cylinders made of refractory material, where those cylinders are particularly designed to act as molds for the lost wax casting of precious metals, semiprecious metals, base metals or titanium or alloys thereof in order to obtain small items, dental prostheses, jewelry and costume jewelry items in general by precision casting. The furnace includes a bed, a hearth portion or base supporting the bed, an upper dome-shaped portion arranged to rest on the hearth portion to delimit a heating or firing chamber therewith, first driving means suitable for producing a relative motion between the dome-shaped portion and the hearth portion between a closed position, in which the dome-shaped portion rests on the hearth portion, and an open position, in which the dome-shaped portion is raised above the hearth portion, heating means carried by the dome-shaped portion, and a program control unit. The furnace also includes at least two work holding plates mounted for rotation in the hearth portion and a second driving means arranged to be controlled by the control unit and designed to cause each work holding plate to rotate about its own vertical axis.

REFERENCES:
patent: 3227798 (1966-01-01), Delange et al.
patent: 3645767 (1972-02-01), Taylor
patent: 3860738 (1975-01-01), Hintenberger
patent: 3931847 (1976-01-01), Terkelsen
patent: 4671770 (1987-06-01), Bell et al.
patent: 4709741 (1987-12-01), Nakamura
patent: 5432319 (1995-07-01), Indig
patent: 5539183 (1996-07-01), Beckley
patent: 5685360 (1997-11-01), Bizzio

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