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Vacuum sintering furnace

A technology of vacuum sintering furnace and furnace body, applied in furnaces, muffle furnaces, cooking furnaces and other directions, can solve the problems of loss of thermal insulation effect of thermal insulation jacket

Inactive Publication Date: 2009-03-18
李永华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a vacuum sintering furnace to overcome the problem that silicon powder gas easily reacts with carbon fibers in a high-temperature vacuum state, so that the thermal insulation sleeve made of carbon fibers loses the thermal insulation effect

Method used

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  • Vacuum sintering furnace

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Experimental program
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Embodiment Construction

[0013] As shown in Figures 1 and 2, the vacuum sintering furnace has a cylindrical furnace body 2, and the furnace body 2 can also be square cylindrical; The thermal insulation cover 4 has a heat insulating cavity between the furnace body 2 and the furnace cover 3, and the outside of the furnace body 2 is provided with an air pump 1 that can provide a circulating cooling medium, and the air pump 1 communicates with the heat insulating cavity. The two ends of the furnace body are respectively provided with front and rear furnace doors 11 and 17, and the front and rear furnace doors 11 and 17 are respectively provided with first and second heat insulation pads 13 and 16 made of carbon fiber, and the axial The expansion and contraction are respectively controlled by the first and second air cylinders 12 and 18 which are located on the front and rear furnace doors 11 and 17 housings. When the first and second heat insulation pads 13 and 16 squeeze the two ends of the heat insulati...

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Abstract

The invention discloses a vacuum sintering furnace, comprising cylinder furnace body. Furnace jacket and heat-insulation jacket are set in the body in turn. Heat-insulation hollow cavity is set between furnace body and jacket. First and second heat-insulation cushions with expanding-contracting along the axial direction are set on the front and back furnace doors. When the first and the second heat-insulation cushions are used to press two ends of heat-insulation jacket sealing sintering region is formed. In the sintering region the support for sintering material is set and electric-heating body is set round the sintering material. In the peripheral face of heat-insulation jacket a graphite jacket is set and the support of sintering material is connected with the graphite jacket. The invention conquers the problem that the silicon powder gas is reacted with carbon fiber so that heat-insulation jacket produced by carbon fiber deprives of the heat-insulation function under the high-temperature vacuum condition. It is provided with long service life, conveniently repairing and high production efficiency.

Description

technical field [0001] The invention relates to the technical field of vacuum sintering furnaces, in particular to a vacuum sintering furnace with a furnace body, a furnace door, a thermal insulation cover and an electric heating body. Background technique [0002] Because of its high-performance thermal stability, silicon carbide is widely used to make various kiln flame tubes, heat radiation tubes, etc., and is even used to make satellite mirrors. The above products are made by reaction sintering in a vacuum sintering furnace at a high temperature of about 1800°. Known vacuum sintering furnace, such as image 3 As shown, the thermal insulation cover 4 made of carbon fiber is provided with a plurality of radial through holes, and the sintered material support frame 7 is fixed on the furnace cover 3 through these through holes. When the sintered blank is placed on the support frame 7 for sintering, silicon powder needs to be cultivated around it. Under the condition of hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B5/05F27B5/06
Inventor 李永华
Owner 李永华