JPH033156B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in hot isostatic pressing equipment.

Hot isostatic press equipment (HOT) uses high temperature and high pressure gas to form high density and high strength sintered bodies.
ISOSTATIC PRESS.Hereafter abbreviated as HIP device. )teeth,
It plays an important role in the development of new materials such as engineering ceramics, and is attracting a lot of interest. The hot isostatic press equipment stores the object to be processed inside a heating furnace (electric heater) installed inside a high-pressure container, pressurizes the inside of the high-pressure container with an inert gas such as Ar gas, and then presses the inside of the high-pressure container with an inert gas such as Ar gas. Process at high temperature. In the hot isostatic press apparatus, the heating furnace is of a portable cartridge type, and the heating furnace is stored in or taken out of the container by opening and closing the upper lid of the high-pressure container. Further, the object to be processed is stored or taken out by opening and closing the heating furnace outside the high-pressure container. To supply power to the heating furnace heater, contact and connect the fixed electrode and contactor (terminal) built into the lower lid of the high-pressure container with the contactor (terminal) at the bottom of the heating furnace when it is inserted into the heating furnace container. It is carried out by.

In recent years, there has been an increasing demand for improved productivity (shortened processing cycle time) of hot isostatic press equipment. Using multiple heating furnaces in sequence to reduce the time the high pressure vessel is occupied is an effective method for shortening cycle time. To achieve this, the heating furnace must be of a closed structure, the object to be processed must be stored in the heating furnace outside the high-pressure container, and the inside of the furnace must be vacuum degassed.
After filling pressurized gas (replacing the gas inside the furnace) and performing hot isostatic pressure treatment, the heating furnace is immediately removed from the high-pressure container and the object to be processed inside the heating furnace is cooled while cutting off contact with the atmosphere. It is necessary to do this. The object to be processed is stored in and taken out of the heating furnace by separating the hearth portion from the cylindrical portion comprising the side heater and the heat insulating layer, and opening and closing the heating furnace. At this time, power supply to the heater becomes a problem. In other words, power supply to the heater (same as connection of thermocouple for temperature measurement)
In this case, it is necessary to connect and connect three places at the same time: the contactor at the bottom of the high-pressure vessel, the contactor at the hearth of the heating furnace, and the heater electrode.Also, regarding the contactor at the hearth, since the heating furnace is a closed type,
It must be sufficiently airtight.

The present invention satisfies the above-mentioned conditions, and includes a hearth section placed inside a high-pressure vessel formed by sealing the upper and lower parts of a cylindrical body with an upper lid and a lower lid, and a heating furnace mounted on the hearth section. In the attached hot isostatic press apparatus, a power supply system to the heater disposed in the heating furnace is provided by a movable terminal that can contact a terminal of the heater and a power supply electrode that can contact the movable terminal. a conductor, the movable terminal being attached to the hearth portion so as to be movable in the vertical direction via an insulator holder; and a sealing member sealing between the conductor and the hearth portion. The power supply electrode is configured by a conductor attached to a member on the lower lid side so as to be movable in the vertical direction via an insulator holder, and the conductor is attached in the direction of the conductor of the movable terminal. It relates to a hot isostatic press device characterized in that it is configured with a biasing spring, and its purpose is to:
An object of the present invention is to provide an improved hot isostatic press device that can easily connect a heater without damaging the airtightness of a heating section when a heating furnace is brought into close contact with the heater.

Next, the hot isostatic press apparatus of the present invention will be explained with reference to an embodiment shown in FIGS. 1 to 4.
In the figure, 1 is a body of a high-pressure container, and 2 and 3 are an upper lid and a lower lid, which are hermetically fitted to the container body 1. Electrodes 15 pass through the lower lid 3 and are airtightly insulated from each other. Inside the high pressure vessels 1, 2, 3,
A heating furnace is housed, and an object 7 to be processed is housed inside the furnace and set on a hearth part 8. Further, 4 is an outer wall of the heating furnace, 5 is a heat insulating layer of the heating furnace, and 6 is a heater of the heating furnace. The lower end of the outer wall 4 is airtightly fitted to the upper part of the hearth support 11 via a seal 12 and fixed by a pin 16, so that the outer wall 4 is integrated into one body. A spring-loaded terminal (power supply electrode) 13 is provided on the upper part of the high-pressure container lower lid 3. The terminal 13 includes a fixed electrode 15 and a conducting wire 14.
connected by. Further, 10 is a movable terminal incorporated in the heating furnace hearth support. With the heating furnace set in the high-pressure container, the spring-loaded terminal 13
and movable terminal 10, and heater terminal 9 and movable terminal 1
0 is contacted and connected, and power is supplied to the furnace heater 6. Details of the terminal portion are shown in Figures 2 and 3. Figure 2 shows the state in which the heater is connected;
FIG. 3 shows a state in which the heater is not wired. The movable terminal 10 has a structure in which a conductor 10a is guided by insulator holders 10b and 10d and can freely move by a predetermined stroke in the vertical direction. The insulator holder 10b is fitted into the hearth support 11, and the insulator holder 10d is fitted into the insulator holder 10b, and the spaces between these holders 10b, 10d and the conductor 10a are completely sealed by seals 10c, 10e. has been done. 10f is a nut for adjusting the height of the conductor 10a,
Used to adjust the length of the movable terminal. Further, 13 is a terminal with a spring, and the terminal 13 is connected to the conductor 1.
3a, an insulator holder 13b, and a spring 13c, and is fixed to a terminal support ring 13d. Note that the conductor 13a can move downward by the amount of deflection of the spring 13c. A plurality of the above terminals are arranged on the circumference as necessary.

Next, the operation of the hot isostatic press apparatus will be explained. FIG. 4 shows the state when the heating furnace is opened and the object to be processed 7 is stored. The movable terminal 10 and the heater terminal 9 are spaced apart from each other. Since the movable terminal 10 is lowered to the lower limit position due to its own weight, the movable terminal 10 and the heater terminal 9 do not come into contact even if the heating furnace is assembled into the hearth support 11 of the hearth portion 8. If the assembled heating furnace is placed in a high-pressure container, the movable terminal 10 and the spring-loaded terminal 13 will come into contact with each other, and if the heating furnace is lowered by its own weight, it will move due to the spring force of the spring-loaded terminal 13. terminal 10
moves upward and comes into contact with heater terminal 9. That is, finally each terminal 10, 13 and the heater terminal 9
are in contact with each other, and then pressed against each other by the spring force of the spring 13c, and the wires are completely connected.

As described above, the present invention provides a hot heating system in which a hearth part is disposed in a high-pressure vessel formed by sealing the upper and lower parts of a cylindrical body with an upper lid and a lower lid, and a heating furnace is mounted on the hearth part. In the hydrostatic press apparatus, a power supply system to a heater disposed in the heating furnace is configured by a movable terminal that can contact a terminal of the heater, and a power supply electrode that can contact the movable terminal, and the movable The terminal is constituted by a conductor attached to the hearth portion via an insulator holder so as to be movable in the vertical direction, and a sealing member for sealing between the conductor and the hearth portion. A power supply electrode is attached to a member on the lower lid side via an insulator holder so as to be movable in the vertical direction, and a spring biases the conductor in the direction of the conductor of the movable terminal. With this structure, when the heating furnace is brought into close contact with the heating furnace, the wiring work of the heater can be performed extremely easily without damaging the airtightness of the heating furnace. In addition, the movable terminal of the hearth has a simple structure that only moves in the vertical direction without any springs, etc., so it is sufficient to ensure the airtightness of the heating furnace with an O-ring, etc., and this part can be configured compactly. It has the effect of

The present invention has been described below with reference to embodiments, but of course the present invention is not limited to such embodiments, and various design improvements can be made without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view showing an embodiment of the hot isostatic press apparatus according to the present invention, FIG. 2 is a longitudinal side view showing the heater wired state, and FIG. 3 is a longitudinal cross-sectional view showing the heater wired state. A side view, FIG. 4 is a partially longitudinal side view showing the state when the object to be processed is stored in the heating furnace. 1... Cylindrical body, 2... Upper lid, 3... Lower lid, 4, 5... Heating furnace, 6... Heater, 9... Terminal of heater 6, 10... Movable terminal, 10a... Movable Conductor of terminal 10, 10b...Insulator holder, 10c to 10e...Seal member, 13...Electrode for power supply, 13a...Conductor of electrode 13 for power supply,
13b...Insulator holder, 13c...Spring, 1
3d... Member on the lower lid 3 side.

Claims (1)

[Claims] 1. In a hot isostatic press device in which a hearth part is arranged in a high-pressure container formed by sealing the upper and lower parts of a cylindrical body with an upper lid and a lower lid, and a heating furnace is installed on the hearth part, A power supply system to a heater disposed in the heating furnace is configured by a movable terminal capable of contacting a terminal of the heater and a power supply electrode capable of contacting the movable terminal, and the movable terminal is connected to the hearth. The power supply electrode is configured by a conductor attached to the part so as to be movable in the vertical direction via an insulator holder, and a seal member for sealing between the conductor and the hearth part, and the power supply electrode is connected to the It is characterized by comprising a conductor attached to a member on the lower lid side so as to be movable in the vertical direction via an insulator holder, and a spring biasing the conductor in the direction of the conductor of the movable terminal. Hot isostatic press equipment.