JPS59100389A - Heating furnace for hot hydrostatic press device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot isostatic press apparatus that stores a workpiece in a heating furnace of a high-pressure container and molds the workpiece under high temperature and high pressure.

As shown in FIG. 1, the conventional hot isostatic press device (HIP device) has a closed high-pressure container (σ) consisting of a cylindrical body (σ1), an upper lid (σ2), and a lower lid (σ3). A heating furnace (a) defined by a heat insulating layer (bl) and having a built-in heating mechanism fC1 accommodates the product to be processed (Oka), and the high pressure vessel (σ) is placed in a press frame tel as shown in FIG. window (e
1), press the upper lid (σ2) and lower lid (σ3), and heat the inert gas such as argon gas sealed inside the high-pressure container (σ) to high temperature and high pressure, and press the upper lid (σ2) and lower lid (σ3) to
d,) has a structure in which high temperature and isodirectional high pressure are applied to form processing such as powder sintering, and in order to improve the thermal efficiency inside the high-pressure container (σ), K, which has particularly excellent heat resistance and heat insulation performance, is used. A heating furnace is defined by a heat insulating layer f, 6+ using the material,
In order to improve the molding processability, the temperature is 2000℃,
It is necessary to increase the pressure to about 2000 atm, and when taking out the processed product after hot isostatic pressing, it is necessary to reduce the pressure in the high pressure container (σ) and lower the temperature inside the furnace to about 100 to 150 °C. The pressure and temperature inside the container (α) are significantly increased or decreased.

However, in the conventional hot isostatic pressing apparatus, the heat insulating layer fA+ that defines the heating furnace is a heat insulating layer (b3) between the inner cylinder (bl) and the outer cylinder (h2), as shown in FIG. Because the structure is filled with inner and outer cylinders (51) (b2
) The filling amount of the insulation material (h3) between the insulation +A' (h3 )V
cm, there is a density difference (generally the lower part is dense and blows), there is a localized area where the insulation performance deteriorates, and the tube (h2) is also affected by thermal displacement and has the disadvantage of being damaged. , inner, outer cylinder (
When the heat insulating layer (b3) is densely packed between bl) (h2), the expansion and contraction of the insulation layer (b3) will cause thermal deformation of the inner cylinder (bl) and the outer cylinder (b3).
Since h2) also becomes deformed, the insulation 44 (h3)
cannot be unnecessarily packed with high density.

The present invention was developed in order to eliminate the above-mentioned drawbacks of the heat insulating layer of the conventional hot isostatic press equipment (tc:b) heating furnace. In a hot isostatic press machine equipped with a heating furnace with a built-in heating mechanism, a double layer of belt-like layers consisting of a heat insulating sheet with low elasticity and a heat insulating sheet with high elasticity is formed in multiple layers around the inner cylinder. It is characterized in that it is equipped with the heat insulating layer formed by providing an outer cylinder on the multi-layered layer, and its purpose is to provide a homogeneous material that is not affected by a significant increase or decrease in temperature IW1 pressure. The object of the present invention is to provide a heating furnace for a hot isostatic press apparatus having a heat insulating layer having heat insulating performance and significantly reducing thermal deformation on the outer cylinder side.

The present invention has the above-mentioned structure, in which a band-shaped double layer consisting of a heat insulating sheet with low elasticity and a heat insulating sheet with high elasticity is surrounded in multiple layers around the inner cylinder, and the multilayer Since the heating furnace is defined by an outer cylinder and a heat insulating layer, the multiple layers of heat insulating sheets with large and small elasticity between the inner and outer cylinders are evenly distributed over the entire area of the heat insulating layer. Even if the above-mentioned large increases and decreases in temperature and pressure occur, and the resulting thermal deformation of the inner cylinder occurs, the highly elastic heat insulating sheet is held by the less elastic insulating sheet, and the less elastic The holding power of the heat insulating sheet eliminates the misalignment of both heat insulating sheets and maintains uniform heat insulating performance.In addition to having high heat insulating performance, the highly elastic heat insulating sheet provides moderate elasticity. Deformation of the cylinder and thermal deformation of the outer cylinder are significantly reduced, and durability and heating furnace performance are significantly improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The present invention provides a third cylindrical portion of the heat insulating layer 1bl provided in the high pressure vessel (σ) shown in FIG. 1 and defining a heating furnace.
It is characterized by having the structure shown in FIG. ) is a band-shaped heat-insulating cloth material coarsely woven with appropriate heat-resistant and heat-insulating material, i.e., a heat-insulating sheet with low elasticity; A highly elastic heat insulating sheet, the width of the insulating sheet (3) and the insulating sheet (4' is as shown in the figure)
The length of the outer cylinder (2) is approximately the same as that of the outer cylinder (2), and the heat insulating sheet (3) is double-layered (3,
4), and the double layer (3, 4) is wrapped around the inner cylinder (11) and the multiple layer (3, 4, 3, 4,...), and the multiple layer (3, 4, 3) is wrapped around the inner cylinder (11). ,,4,...) are integrally fitted on the outer periphery of the outer cylinder (21 pieces). ,
An appropriate heat insulating material may be filled between the lower panels.The structure may be the same as the conventional example, or it may be constructed by using multiple weights of heat insulating sheet (3) and heat insulating sheet (4) as described above (as shown in the figure). The cross section of the cylindrical part of the heat insulating layer 1b)) in this embodiment configured as described above is as shown in FIG. In addition, in the above embodiment, large and small elastic heat insulating sheets +31 (41) are wrapped around a long strip material, but as shown in FIG. )
f3i (4i) may be constructed by stacking cylindrical bodies of different diameters. The illustrated embodiment has the above-mentioned structure, so the heat insulating sheet (3) between the inner cylinder (1) and the outer cylinder (21) ) and insulation sheet (4' is a double layer (3, 4) stacked on top of each other, which is further multilayered (3, 4, 3, 4,...), and both insulation sheets) (3' (4: is a wide material - (Since it is layered, the filling amount is evenly distributed over the entire insulation layer, and in addition, a highly elastic insulation sheet (41 is placed in close contact with a small elastic insulation sheet (3) Even if the inner cylinder (1) is thermally deformed due to significant changes in the pressure and temperature inside the high-pressure vessel, the heat-insulating sheet (3) with low elasticity
) causes misalignment of the highly stretchable heat insulating sheet (4;), but the above-mentioned uniform heat insulation performance is maintained, and the moderate elasticity of the highly stretchable heat insulating sheet (4) causes the inner cylinder il +
, the deformation of the outer cylinder (2) is prevented, and the thermal deformation of the outer cylinder (2) is also significantly reduced, and the outer cylinder (2) has a high heat insulating effect and the durability and heating furnace performance are significantly improved.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments (the present invention may be modified in various ways without departing from the spirit of the present invention). It is something.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a high-pressure container in a conventional hot isostatic press device, FIG. 2 is a press state diagram in the same device, and FIG. 6 is a manufacturing process diagram of a heat insulating layer showing an embodiment of the present invention. FIG. 4 is a longitudinal sectional view of the heat insulating layer in this embodiment, and FIG. 5 is a cross sectional view showing the heat insulating layer in FIG. 4. σ: High pressure container, h: Heat insulation layer, C: Heating mechanism, A: Heating furnace 1: Inner cylinder, 2: Outer cylinder, 6: Heat insulation sheet (Kurobo) 4
:Heat insulation sheet (felt material) Sub-agent Patent attorney Shigefumi Okamoto and two others Figure 1
Figure 2 α3

Claims (1)

[Claims] In a hot isostatic press machine that is equipped with a heating furnace that is defined by a heat insulating layer in a high-pressure container and has a built-in heating mechanism, a belt-shaped double layer made of a heat insulating sheet with low elasticity and a heat insulating sheet with high elasticity is applied to the inner tube. As well as surrounding multiple 1 ~ around ,
A heating furnace for a hot isostatic press apparatus, characterized in that the heat insulating layer is formed by providing an outer cylinder on the multiple layers.