CN102625502B - A heater for vacuum hot pressing furnace - Google Patents

Abstract

The invention relates to a heater, in particular to a heater used in a vacuum hot pressing furnace. The interior of the heater is a cavity, and there is a carbon felt insulation layer inside the heater shell. On the four side walls inside the heater, the vertical heating plate and the heater shell are connected through electrode rods and support rods. On the upper wall and the lower wall, the horizontal heating plate 1 and the horizontal heating plate 2 are connected to the heater shell through electrode rods and support rods. The heating efficiency is improved and the heating time is shortened.

Description

A heater for vacuum hot pressing furnace

technical field

The invention relates to a heater, in particular to a heater used in a vacuum hot-press furnace.

Background technique

Metals, ceramics and some refractory metal intermediate compound powders need to be heated and sintered to become materials with certain density and certain mechanical properties. The powdery material is placed in a high-carbon mold in a vacuum and protective atmosphere, and when it is heated to a softened state at a high temperature, it is molded under pressure. Vacuum hot pressing furnace combines vacuum, hot pressing forming and high temperature sintering together, and is mainly suitable for high temperature hot forming of new materials such as powder metallurgy and functional ceramics. With the leap of science and technology, the high-temperature sintering process under normal pressure can no longer meet the needs of new material production. So a new process of vacuum hot pressing gradually appeared.

At present, the heating plate of the heater is strip-shaped or column-shaped, and the average temperature of the temperature field is poor, and the thermal efficiency is low. It is difficult to effectively transfer heat through the mold to the powder substance in the mold by means of thermal radiation heat transfer.

Contents of the invention

Aiming at the problems existing in the current vacuum hot-press furnace, the invention provides a heater for the vacuum hot-press furnace, which effectively solves the problems of low thermal efficiency and poor temperature field uniformity. the

The present invention is used for a heater of a vacuum hot-pressing furnace. The inside of the heater is a cavity, and there is a carbon felt insulation layer inside the heater shell. The heating plate is connected to the heater shell, and the horizontal heating plate 1 and the horizontal heating plate 2 are connected to the heater shell through electrode rods and support rods on the upper wall and the lower wall inside the heater.

One diagonal of the vertical heating plate is provided with three holes, the electrode rods pass through the holes at both ends, and the vertical heating plate is connected with the heater shell, and the support rod passes through the hole in the middle, and the vertical heating plate is connected to each other. The plate is secured to the heater housing.

Two holes are arranged on one diagonal of the horizontal heating plate 1, and the electrode rod passes through the two holes to connect the horizontal heating plate 1 and the heater shell, and two holes are arranged on the other diagonal, The support rod passes through two holes, and connects the horizontal heating plate 1 and the heater shell.

Two holes are arranged on a diagonal of the horizontal heating plate 2, and the electrode rod passes through the two holes to connect the horizontal heating plate 2 and the heater shell, and two graphite shields are overlapped on the horizontal heating plate 2 An insulating gasket is arranged between the graphite baffle and the horizontal heating plate 2, and the support rod connects the graphite baffle, the horizontal heating plate 2 and the heater shell.

The position where the electrode rod is connected with the carbon felt insulation layer and the heater shell is provided with a first insulating sleeve, and the position where the support rod is connected with the carbon felt insulation layer and the heater shell is provided with a second insulation sleeve and graphite tube, and the graphite tubes are arranged symmetrically on both sides of the second insulating sleeve.

Compared with the prior art, the remarkable features and beneficial effects of the present invention are: the temperature regulation ability of the heater and the temperature uniformity of the temperature field are improved, and the heat loss is reduced due to the measures of heat preservation and heat insulation. The heating efficiency is improved and the heating time is shortened.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the structural representation of vertical heating plate;

Fig. 4 is the A-A view of Fig. 3;

Fig. 5 is the structural representation of horizontal heating plate 1;

Fig. 6 is the B-B view of Fig. 5;

Fig. 7 is the structural representation of horizontal heating plate 2;

Fig. 8 is the C-C view of Fig. 7;

In the figure: 1 heater shell, 2 carbon felt insulation layer, 3 joint, 4 first insulating sleeve, 5 electrode rod, 6 electrode nut, 7 vertical heating plate, 8 second insulating sleeve, 9 graphite tube, 10 support rod , 11 first nut, 12 insulating gasket, 13 graphite baffle, 14 second nut, 15 horizontal heating plate 1, 16 horizontal heating plate 2, 17 mould.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

The present invention is used for the heater of vacuum hot-pressing furnace, and the inside of the heater is a cavity, and a mold 17 is arranged at the inner center position, and a carbon felt insulation layer 2 is arranged inside the heater shell 1, and four side wall surfaces inside the heater are Above, the vertical heating plate 7 is connected to the heater shell 1 through the electrode rod 5 and the support rod 10. On a diagonal line of the vertical heating plate 7, three holes are arranged, and the electrode rod 5 passes through the holes at both ends, and the The vertical heating plate 7 is connected with the heater shell 1, the electrode rod 5 passes through the heater shell 1 and the carbon felt insulation layer 2, and the vertical heating plate 7 is fixed on the heater shell 1 by two electrode nuts 6, and the vertical There is a gap between the straight heating plate 7 and the heater shell 1, and the electrode rod 5 is equipped with a first insulating sleeve 4 at the contact part of the carbon felt insulation layer 2 and the heater shell 1, and one end of the electrode rod 5 is connected with the joint 3 by threads, and the joint The other end of 3 is connected with the water-cooled electrode outside the heater, and the support rod 10 passes through the hole in the middle to fix the vertical heating plate 7 on the heater shell 1 . The support rod 10 passes through the heater shell 1 and the carbon felt insulation layer 2, and the vertical heating plate 7 is fixed by two first nuts 11. The position where the support rod 10 contacts the carbon felt insulation layer 2 and the heater shell 1 is arranged with a Two insulating sleeves 8 and graphite tubes 9. Two graphite tubes 9 are installed on both sides of the second insulating sleeve 8 , and the graphite tubes 9 are overlapped on the second insulating sleeve 8 .

Both the horizontal heating plate 115 and the horizontal heating plate 216 are connected to the heater shell 1 through the electrode rod 5 and the supporting rod 10 on the upper wall surface and the lower wall surface inside the heater. One diagonal of the horizontal heating plate 115 is provided with two holes, the electrode rod 5 passes through the two holes, and the horizontal heating plate 115 is connected with the heater shell 1, and the other diagonal is provided with two holes to support The rods 10 pass through the two holes and connect the horizontal heating plate 115 to the heater housing 1 . The electrode bar 5 of horizontal heating plate 115 and support bar 10 installation mode are identical with vertical heating plate 7, and two holes are arranged on a diagonal of horizontal heating plate 216, and electrode bar 5 passes through two holes, and horizontal heating plate 216 is provided with two holes. The plate 216 is connected to the heater shell 1, and two graphite baffles 13 are lapped in the middle of the horizontal heating plate 216. There is an insulating gasket 12 between the graphite baffle 13 and the horizontal heating plate 216, and the support rod 10 connects the graphite through the second nut 14 The baffle plate 13, the horizontal heating plate 216 are connected to the heater housing 1, and the installation method of the electrode rod 5 and the supporting rod 10 of the horizontal heating plate 216 is the same as that of the vertical heating plate 7.

Working process: put the powdery material in the mold 17, and heat the vertical heating plate 7, the horizontal heating plate 115 and the horizontal heating plate 216 through the water-cooled electrode connected to the outside of the electrode rod 5, and the heating plate adopts the heat transfer method of heat radiation The heat is transferred to the powdery material in the mold 17 through the mold 17, and heated to a softened state through high temperature. The heating efficiency is improved and the heating time is shortened.

Claims (4)

1. the heater for vacuum hotpressing stove, this heater inside is cavity, it is characterized in that there is carbon felt heat-insulation layer heater housing inside, on four side wall surfaces of heater inside, by electrode stem, with support bar, vertical heating plate is connected with heater housing, on the upper wall surface and lower wall surface of heater inside, all by electrode stem, with support bar, horizontal heating plate 1 is connected with heater housing with horizontal heating plate 2; Electrode stem and the position that carbon felt heat-insulation layer and heater housing join, be provided with the first insulating case, and support bar and the position that carbon felt heat-insulation layer and heater housing join, be provided with the second insulating case and graphite-pipe, and graphite-pipe is symmetricly set on the second insulating case both sides; Described horizontal heating plate and the vertically flat shape of heating plate are S types.

2. a kind of heater for vacuum hotpressing stove as claimed in claim 1, it is characterized in that on a diagonal of vertical heating plate, be provided with three holes, electrode stem is through the hole at two ends, vertical heating plate is connected with heater housing, support bar, through middle hole, is fixed on vertical heating plate on heater housing.

3. a kind of heater for vacuum hotpressing stove as claimed in claim 1, it is characterized in that being provided with two holes on a diagonal of horizontal heating plate 1, electrode stem is through two holes, horizontal heating plate 1 is connected with heater housing, on another diagonal, be provided with two holes, support bar, through two holes, is connected horizontal heating plate 1 with heater housing.

4. a kind of heater for vacuum hotpressing stove as claimed in claim 1, it is characterized in that being provided with two holes on a diagonal of horizontal heating plate 2, electrode stem is through two holes, horizontal heating plate 2 is connected with heater housing, on horizontal heating plate 2, overlap two carbon barriers, in the middle of carbon barrier and horizontal heating plate 2, be provided with insulation spacer, support bar is connected carbon barrier, horizontal heating plate 2 with heater housing.

Images