JPH025511Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is based on a high temperature of about 1,500℃ and 2,000℃ of processed products such as powdered sintered metal stored in a heating furnace inside a high-pressure container.
The present invention relates to an improvement of a heater for a hot isostatic press device that presses and molds the same processed product by applying high atmospheric pressure.

In the heating furnace built into the high-pressure container of the hot isostatic press device, it is necessary to maintain a uniform temperature in the furnace in order to obtain a molded product with stable quality. In the apparatus, the heaters shown in FIGS. 1 to 3 are used. The heater connects a rod-shaped insulating material a, a spiral heating element c fitted into a spiral groove b on its outer peripheral surface, and the ends of the spiral heating elements c of adjacent rod-shaped insulating materials a. It consists of a conductor d and a nut e that is screwed into a male thread provided on the edge of a rod-shaped insulator a to fix the conductor d to the rod-shaped insulator a, and is located in a heating furnace and becomes high temperature. There was a problem in that expensive heat-resistant metals had to be used for the conductor d and the nut e, which increased manufacturing costs.

This proposal addresses the above-mentioned problems, and consists of a plurality of rod-shaped insulating materials installed upright inside a high-pressure container along its inner circumferential surface, and a linear heating element wound spirally around each of the rod-shaped insulating materials. In a heater for a hot isostatic pressing device, the ends of each of the rod-shaped insulators are connected by an insulating material, and the ends of each of the rod-shaped insulators are connected by an insulating material,
Hot hydrostatic pressure characterized in that the linear heating elements wound around the outer peripheral surface of each of the rod-shaped insulating materials are connected in a series through a linear heating element installed between the ends of the linear heating elements. Regarding heaters for press equipment,
The objective is to provide an improved heater for a hot isostatic press machine that can reduce manufacturing costs.

Next, the heater for the hot isostatic press apparatus of the present invention will be explained with reference to an embodiment shown in FIGS. 4 and 5. In FIG.
an upper lid that is removably inserted into the upper part of the high-pressure container 1; a lower lid that is removably inserted into the lower part of the high-pressure container 1;
Numerals 4 and 5 are gaskets attached to the upper lid 2 and the lower lid 3, and 6 is a heating furnace. ing. In addition, the heater 10 in Figures 4 and 5 is the most distinctive feature of the present invention, and the heater 1
0 is composed of a molybdenum wire heating element 11 and a rod-shaped insulating material 12, and the heating element 11 is spirally wound around the outer peripheral surface of the rod-shaped insulating material 12. Further, 20 is a ring-shaped insulating material that connects the lower ends of each of the rod-shaped insulating materials 12, 21 is a ring-shaped insulating material that connects the upper end of each of the rod-shaped insulating materials 12,
11a are the first and second from the right side in Fig. 5,
The linear heating elements 11b installed between the upper ends of the third, fourth, fifth, and sixth heating elements 11 are the second, third, fourth, and fifth heating elements from the right side in FIG. It is a linear heating element installed between the lower ends of the body 11, and in the embodiment shown in FIG.
6 linear heating elements 1 spirally wound around 2
1 are connected in a series through linear heating elements 11a and 11b. Note that inside the heating furnace 6, there is yet another rod-shaped insulating material 12 and a linear heating element 11 spirally wound around the rod-shaped insulating material 12, and these linear heating elements 11 are also connected in the same manner. Further, 13a and 13c in FIG. 4 are electrode rods extending downward from the first and sixth heating elements 11 in FIG. 5, and 13b and 13d are connection terminals on the lower lid 3 side that contact the electrode rods 13a and 13c , 14 is a hearth installed on the lower heat insulating material 8a of the heating furnace 6, 15 is a connecting fitting that connects the upper lid 2 and the heating furnace 6, and 16 is a high pressure gas that has passed through the upper lid 2. A supply pipe, 17, is a high pressure gas passage provided at the lower end of the heating furnace outer plate 7;
8 is the lower part 7a of the heating furnace outer plate 7 and the lower part 8 of the heat insulating material 8
The high-pressure gas passage 18 is provided with a check valve that only allows the high-pressure gas to enter the heating furnace 6, but this is not shown. Further, the heating furnace 6 has a part, for example, lower parts 7a and 8a, which can be opened and closed, and when opened, the article to be processed is placed on the hearth 14 or the workpiece is placed on the hearth 14. Although it has become possible to take out the material from the container, a detailed explanation regarding this point has been omitted.

Next, the operation of the hot isostatic press apparatus will be explained. When the upper lid 2 and the heating furnace 6 are outside the high-pressure vessel 1, a part of the heating furnace 6 is opened, a product to be processed is placed on the hearth 14, and a part of the heating furnace 6 is closed. Enter the main pressure molding process. That is, the upper lid 2 and the heating furnace 6 suspended therein are inserted into the high-pressure vessel 1, and the upper part of the high-pressure vessel 1 is closed with the upper lid 2. At this time, the electrode rods 13a and 13c come into contact with the connection terminals 13b and 13d on the lower lid 3 side. Next, the high pressure gas is passed from the high pressure gas supply pipe 16 to the high pressure gas passages 17,1.
8 into the heating furnace 6, and the inside of the high pressure vessel 1 and the inside of the heating furnace 6 are brought to a high pressure of about 2000 atmospheres. At the same time, connect the power to the terminal 13d → electrode rod 13
c→Each linear heating element 11 connected in a series via linear heating elements 11a and 11b→Electrode rod 13a→
The power is supplied to the connection terminal 13b, and the amount of power supplied is controlled to keep the temperature of the heating furnace 6 uniform at about 1500°C. As a result, the product to be processed is pressure-formed, but after the pressure-forming is completed, the high-pressure container 1 and the heating furnace 6 are cooled and the high-pressure gas is discharged by appropriate means to return them to their original state. Then, the lid 2 and the heating furnace 6 are taken out of the high-pressure vessel 1, and the pressure-molded product is taken out from the heating furnace 6.

As described above, the present invention consists of a plurality of rod-shaped insulating materials 12 erected inside the high-pressure container 1 along its inner peripheral surface, and a linear heating element 11 wound spirally around each rod-shaped insulating material 12. In a heater for a hot isostatic press device, linear heating elements 11a, 11 each having a linear heating element 11 wound around the outer peripheral surface of each rod-shaped insulating material 12 are installed between the ends of the linear heating element 11.
Since they are connected in a series through b, there is no need to use conductors d and nuts e made of expensive heat-resistant metals for the same connection, which has the effect of reducing manufacturing costs.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a conventional heater for hot isostatic press equipment, Fig. 2 is a plan view thereof, Fig. 3 is a partially longitudinal side view showing an enlarged part of the heater, and Fig. 4 is a side view showing a conventional heater for a hot isostatic press device.
The figure is a longitudinal side view showing an embodiment of the heater for a hot isostatic press apparatus according to the present invention, and FIG. 5 is a side view showing a part thereof in an enlarged manner. 1... High pressure container, 10... Heater, 11...
... Linear heating element, 11a, 11b... Linear heating element for connection, 12... Rod-shaped insulating material.

Claims (1)

[Scope of utility model registration request] A heater for a hot isostatic press machine, which consists of a plurality of rod-shaped insulators installed along the inner circumferential surface of a high-pressure container, and a linear heating element wound spirally around each rod-shaped insulator. In the linear heating device, the ends of each of the rod-shaped insulators are connected by an insulating material, and each of the linear heating elements wrapped around the outer peripheral surface of each of the rod-shaped insulating materials is installed between the ends of the linear heating elements. A heater for a hot isostatic press device, characterized in that it is connected in a series of states through a body.