JPH0144998B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a method of subjecting objects to be processed, such as porous sintered bodies, cast products, and fiber molded bodies, to molten metals such as pitztal, metal, and glass under high pressure. The present invention relates to a high-pressure impregnation device for impregnating a porous object with other physical substances to improve and expand its properties.

[Conventional technology]

After primary sintering, porous carbon bodies, carbon fiber molded bodies, Si-C fiber molded bodies, cast iron, etc., are processed under high pressure via a gas pressure medium into molten metals such as pizzitars, metals, glass, etc. As a high-pressure impregnating device that improves and expands the properties by impregnating other physical substances, for example, the 7th
The method described in Japanese Patent Application Laid-Open No. 60-039104 shown in the figure and Japanese Utility Model Application No. 61-075630 shown in FIG. 8 has been proposed.

In FIG. 7 showing the main parts of the prior art device of the former (proposed in JP-A No. 60-039104), 54 is a high-pressure chamber, and the high-pressure chamber 54 is airtightly connected to the high-pressure container 51 and its upper and lower openings. It is defined by an upper lid 52 and a lower lid 53 that are fitted into the chamber, and a heat insulating layer 55 and a heater 56 are provided around the inside thereof, and a high pressure medium gas (not shown) is provided in the high pressure chamber 54. A gas passage for introduction is provided.

Reference numeral 61 denotes a holding cylinder disposed inside the heater 56, and a lid 62 is airtightly and removably fitted into its upper opening, and its lower end is airtightly attached to the lower lid 2. It has been. However, a gas passage 61a communicating with the high pressure chamber 4 side is provided in the lower part of the holding cylinder 61 to pressurize the high pressure chamber 54.
It is configured to prevent the holding cylinder 61 from being damaged due to differential pressure during pressure reduction. Further, the heater 56 is held on the outer periphery of the holding cylinder 61 via an insulating member, and can be energized by a power supply means (not shown).

Reference numeral 60 denotes a push rod inserted through the lower lid 53 so as to be freely raised and lowered, and the push rod 60 is connected at its lower end to a drive means (not shown) so as to be able to move up and down.

Reference numeral 59 denotes an object to be impregnated, which is the lid 6 of the holding cylinder 61.
2 through a holding member.

A molten impregnating material 58 is housed in a container 57 placed on the upper end of the push rod 60 via a support member.

The former prior art device has the above-mentioned configuration, in which the impregnating material charged in advance into the container 57 is heated and melted by the heater 56 to form a molten metal 58, and the container 57 containing the molten metal 58 and the push rod 60 are connected to each other. The object to be impregnated 59 suspended above the molten metal 58 is immersed in the molten metal 58 and impregnated under isotropic high pressure via a high-pressure medium gas.

In FIG. 8 showing the main parts of the latter (proposed in Utility Model Application No. 1983-075630) prior art device, 74 is a high-pressure chamber, and the high-pressure chamber 74 is airtightly connected to the high-pressure container 71 and its upper and lower openings. It is defined by an upper lid 72 and a lower lid 73 that are fitted into the chamber, and a heat insulating layer 75 and a heater 76 are provided around the inside thereof. A gas passage for introduction is provided.

Further, the heat insulating layer 75 is disposed in a cylindrical shape inside the high pressure container 71, and the upper end thereof is provided with the upper lid 72.
An upper heat insulating layer 75a attached to the heat insulating layer 75a is disposed, and the heater 76 is held on the outer periphery of a holding cylinder 81 disposed inside the heat insulating layer 75 via an insulating member, and is connected to a power supply (not shown). It is possible to conduct electricity by means.

Reference numeral 79 denotes an object to be impregnated, which is suspended from the upper lid 72 which can be inserted into and removed from the high-pressure container 51 via a support member 90 .

Reference numeral 80 is a push rod inserted through the lower lid 73 so as to be freely raised and lowered, and the push rod 80 is connected to a drive means (not shown) at its lower end so that it can move up and down.

A molten impregnating material 78 is stored in a container 77 placed on the upper end of the push rod 80 via a support member. Further, a base heater 86 is provided at the bottom of the container 77, which moves up and down together with the container 77, and which can be energized by a power supply means (not shown).

This latter prior art device has the above configuration, in which the impregnating material previously charged into the container 77 is heated and melted by the heater 76 and the base heater 86 to form a molten metal 78, and the container 77 containing the molten metal 76 is heated and melted by the heater 76 and the base heater 86. The object to be impregnated 79 suspended above the push rod 80 is immersed in the molten metal 78 and impregnated under isodirectional high pressure via a high pressure medium gas.

[Problem that the invention seeks to solve]

In all of the above-mentioned conventional high-pressure impregnating apparatuses, the object to be impregnated is suspended from above a high-pressure chamber, and a container containing molten impregnating material melted by a heater is raised from below the high-pressure chamber to impregnate the object. The material is immersed in a molten impregnating material and impregnated under isotropic high pressure via a high-pressure medium gas.

During this impregnation process, harmful decomposition gas or metal vapor is generated from the molten impregnating material that adheres to the heater and the insulating member of the heater.

For example, from the molten pitztar-based impregnating material,
Decomposed gases such as hydrocarbons (CmHm) are generated, but if these adhere to the heater, carbon, which is a highly conductive material, will burn onto the surface and remain, lowering the electrical resistance of the heater and inhibiting heat generation efficiency. If it adheres to the insulating member that holds the heater, the insulator of the power input part, etc., the insulation becomes defective, causing damage to the insulator due to electrical leakage, resulting in the inability to operate.

Also, for example, low melting point metals (Zn, Pb, Cu
The molten metal of the impregnating material (e.g.) generates its own metal vapor, which forms a metal film when it adheres to the surfaces of the components in the high-pressure chamber, and forms a conductive film on the heater and insulating members. Not only does it have the same negative effect as the carbon that remains after being burned onto the surface, but also the fact that these deposited metals are deposited under high temperature and high pressure conditions results in contamination that is difficult to remove.

Therefore, it is necessary for the high-pressure impregnating apparatus to have a function that can protect the heater and the insulating member from the effects of decomposed gas or metal vapor generated from the molten impregnating material during the treatment.

However, the former (Unexamined Japanese Patent Publication No. 60-039104 shown in Figure 7)
In the device proposed in No. 1, the container 57 containing the molten metal 58 of the impregnating material and the object 59 to be impregnated are sealed with a holding cylinder 61.
1 is provided with a gas passage 61a that communicates with the high pressure chamber 54 side, so that gas can freely flow between the holding cylinder 61 and the high pressure chamber 54, and there is no influence of decomposed gas or metal vapor generated from the molten metal 58. This structure is insufficient to protect the heater 56 and the insulating member disposed within the high pressure chamber 54.

In this apparatus, the object to be impregnated 59 is suspended from the lid 62 of the holding cylinder 61 via a support member, and the loading and unloading of the object to be impregnated 59 is as follows.
For example, when loading and unloading from the lower opening of the high-pressure container 51, the lower lid 53, push rod 60, container 57, heater 56
In addition, when loading and unloading together with the holding cylinder 61, and when loading and unloading from the upper opening of the high-pressure vessel 51, even if the heat insulating layer 55 has a two-part structure and the upper part of the heat insulating layer 55 can be attached and detached together with the upper lid 52, It cannot be attached and detached together with the upper lid 52, and in order to attach and detach the lid 62 and the object to be impregnated 59 suspended thereon, it is necessary to provide a loading and unloading means different from that of the upper lid 52.

As mentioned above, the device according to the former proposal has an insufficient function of protecting the heater and the insulating member from the adverse effects of decomposition gas or metal vapor generated from the molten metal of the impregnating material, and it is difficult to install and remove the object to be impregnated. The drawback is that it requires an inefficient procedure.

And also the latter (Jetke 61-- shown in Figure 8).
In the apparatus proposed in No. 075630), an upper heat insulating layer 75a and a support member 90 are attached to the upper cover 72, and the object 79 to be impregnated, which is suspended from the lower end of the support member 90, is heated together with the upper cover 72 under high pressure. It is configured such that it can be loaded and unloaded from the upper opening of the container 71, and can eliminate one of the aforementioned drawbacks of the former, ie, the impossibility of loading and unloading the object to be impregnated.

However, in this device, for example, the heater 7
Even if the holding cylinder 81 of No. 6 is made to be a gas-impermeable structural member, the decomposed gas or metal vapor generated from the molten metal 78 of the impregnating material is transported upward by the convection of the high-pressure gas pressure medium, and the holding cylinder 81 is It diffuses out of the holding cylinder 81 through the upper opening, reaches the heater 76 and the insulating member, and has an adverse effect on the heater 76 and the insulating member as described above.

As mentioned above, the device according to this latter proposal does not have the function of protecting the heater and insulating members from the adverse effects of decomposed gas or metal vapor generated from the molten metal of the impregnating material, and does not have the function of protecting the heater and insulating members from the adverse effects of decomposition gas or metal vapor generated from the molten metal of the impregnating material. There is a drawback that stable operation cannot be performed for those which generate decomposition gas or metal vapor harmful to the heater and insulating members from the molten metal of the impregnating material during the impregnation process.

Therefore, in view of the above-mentioned problems, the present invention is a high-pressure impregnating device that can stably process impregnating materials that generate decomposition gas or metal vapor harmful to heaters, insulating members, etc. from the molten metal of the impregnating material during impregnation treatment. The purpose is to provide

[Means for solving problems]

The high-pressure impregnation apparatus according to the present invention for solving the above-mentioned problems has a high-pressure chamber 4 defined by a high-pressure container 1 and an upper lid 2 and a lower lid 3 that seal the upper and lower openings of the high-pressure container 1. A heat insulating layer 5 and a heater 6 are provided around the inside thereof, and the high pressure chamber 4 is provided with a gas inlet 21 and an outlet 22, and the impregnating material is placed in the processing space 12 surrounded by the heater 6. Molten metal 8
A container 7 accommodating the same is placed, and an object 9 to be impregnated is suspended above the container 7 via a holding member, and one or both of the container 7 and the object 9 to be impregnated are moved up and down to mutually interact with each other. The body 9 is immersed in the molten metal 8 of the impregnating material under high pressure via the pressure medium gas introduced into the high pressure chamber 4. In the apparatus for impregnation treatment, a cooling medium flow path 2 is provided inside the upper lid 2.
0, the flow path 20 communicates with a cooling medium supply and discharge means, and the heat insulating layer 5 has an inverted cup shape and has an opening at its upper bottom. An upper heat insulating layer 5a attached to the upper cover 2 is loosely fitted into the bottom opening, and the heat insulating layer 5 is connected to its upper end surface and the upper cover 2.
The gas discharge port 22 is provided in the lower lid 3, and a cup-shaped protective cylinder 11 with low gas permeability is provided inside the heater 6,
A gas outlet 2 of the lower lid 3 is provided at the bottom of the protective tube 11.
A gas passage 14 communicating with the upper lid 2 is provided, and the upper end of the protective cylinder 11 is disposed near the upper lid 2 through a loose fitting gap between the heat insulating layer 5 and the upper heat insulating layer 5a. 11 is characterized in that a gas passage leading to the high pressure chamber 4 is formed in the upper part of the chamber 11.

[Effect]

A container 7 containing molten impregnating material 8 is placed in a high-pressure chamber 4 defined by a high-pressure container 1, an upper lid 2, and a lower lid 3, and equipped with a heat insulating layer 5 and a heater 6 therein,
The object to be impregnated 9 is immersed in the molten metal 8 of this impregnating material,
The basic operation of performing the high-pressure impregnation treatment under high pressure via the high-pressure medium gas introduced into the high-pressure chamber 4 is the same as before, and the impregnation treatment is performed roughly in the following order of steps.

Vacuum drawing process (venting gas from the porous body to be impregnated) Vacuum heating process (melting of the impregnating material and preheating of the body to be impregnated) Immersion process (immersion of the body to be impregnated into the molten metal of the impregnating material) Pressurizing process (high pressure inert pressure) (Introduction of medium gas) Pulling process (pulling up and cooling of the object to be impregnated) Depressurization process (discharge of high-pressure inert pressure medium gas).

Pyrolysis gas or metal vapor of the impregnating material is generated from the molten metal 8 of the impregnating material during the vacuum heating step or the pulling step of the high-pressure impregnating process.

However, in the high-pressure impregnation apparatus according to the present invention, a pot-shaped protective cylinder 11 with low gas permeability is provided inside the heater 6, and the molten metal 8 of the impregnating material is
The container 7 accommodating the is placed in the processing space 12 surrounded by the heater 6, that is, in the protection cylinder 11. Therefore, the decomposition gas or metal vapor generated from the molten metal 8 of the impregnating material during the above-mentioned high-pressure impregnation process is blocked by the protective cylinder 11 and cannot directly reach the heater 6 and its insulating member.

Note that the low gas permeability cup-shaped protection tube 11
A gas passage communicating with the gas discharge port 22 of the lower lid 3 is provided at the bottom of the protective cylinder 11, and the upper end of the protective cylinder 11 is connected to the vicinity of the upper lid 2 through a loose fitting gap between the heat insulating layer 5 and the upper heat insulating layer 5a. up to the upper lid 2.
A cooling medium flow passage 20 communicating with a cooling medium supply/discharge means is provided inside the cooling medium. Therefore, the decomposition gas or metal vapor generated from the molten impregnating material 8 in the protection tube 11 can flow out of the system through the gas passage 14 and the outlet 22 of the lower cover 3 below the protection tube 11. However, it cannot flow out to the heater 6 side outside the protective cylinder 11. Furthermore, the decomposition gas or metal vapor that diffuses inside the protective tube 11 and tries to diffuse and flow out above the protective tube 11, that is, from the upper open end thereof, is absorbed between the protective tube 11 and the upper lid 2. In other words, it reaches the vicinity of the upper lid. However, the temperature near the upper lid 2 is much lower than that of the processing space 12 below due to the cooling effect of the cooling medium flow passage 20 of the upper lid 2 and the thermal insulation effect of the heat insulating layer 5a. The decomposition gas or metal vapor that attempts to diffuse and flow out from the upper end of the protective tube 11 is not able to maintain its form as a gas or vapor due to a decrease in temperature, and is deposited in a low temperature area near the top lid, and the low temperature It cannot diffuse and flow through the body to other parts.

In addition, a gas passage leading to the high pressure chamber 4 is formed in the upper part of the protective tube 11, so that the differential pressure between the inside of the protective tube 11 and the high pressure chamber 4 is always approximately the same when the pressure is increased or decreased during the high pressure impregnation process. Maintained at equal pressure.

That is, the protective cylinder 11 has the following effect on the decomposition gas or metal vapor generated from the molten metal 8 of the impregnating material during the above-mentioned high-pressure impregnation process.

In relation to vapor pressure, the impregnating material molten metal 8 may be
The largest amount of decomposition gas or metal vapor is generated, but these are blocked by the protective tube 11 and cannot directly flow out to the high pressure chamber 4 outside the protective tube 11, and most of them are trapped at the bottom of the protective tube 11 by vacuuming. The gas is discharged to the outside of the system through a gas discharge port 21 provided therein. Then, some of the decomposed gas or metal vapor that diffuses within the protective tube 11 and tries to diffuse out from the upper opening end of the protective tube 11 is lowered in temperature in the low temperature area near the upper lid 2, as described above. It cannot maintain its form as a gas or vapor and is deposited in the low-temperature area.

Furthermore, in the pressurization step or the pulling step of the high-pressure impregnation treatment step, the generation of decomposition gas or metal vapor from the molten metal 8 of the impregnating material decreases due to the pressure of the pressure medium gas, but the generation continues. , these are blocked by the protective tube 11 and cannot directly flow out to the high pressure chamber 4 outside the protective tube 11, and as described above,
When attempting to flow out from the upper open end of the protective tube 11, it ends up reaching a low temperature area near the top lid 2, and is deposited in the low temperature area.

Therefore, the decomposition gas or metal vapor generated from the molten metal 8 of the impregnating material during the impregnation process is blocked by the protective tube 11 and cannot flow directly into the high pressure chamber 4, and also cannot flow out from the upper opening of the protective tube 11. However, the heater 6 outside the protective cylinder 11 cannot maintain its shape as a gas or vapor and cannot diffuse from the vicinity of the opening.
The heater 6 and the insulating member are protected from the harmful effects of the decomposition gas or metal vapor without reaching the insulating member.

As described above, the high-pressure impregnation apparatus according to the present invention protects the heater and the insulating member from the effects of decomposed gas or metal vapor generated from the molten metal of the impregnating material during the impregnation process, and is harmful to the heater and the insulating member. It is also possible to stably treat impregnating materials generated from molten metal such as decomposed gas or metal vapor.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention, and in FIG. 1, 4 is a high pressure chamber, and the high pressure chamber 4 is airtightly and detachably attached to the high pressure container 1 and its upper and lower openings. It is defined by an upper lid 2 and a lower lid 3 that are fitted to the inside, and a heat insulating layer 5 and a heater 6
is provided around the lower lid 3, and a high-pressure gas medium is introduced through a gas passage 21 provided in the lower lid 3.

The heat insulating layer 5 has an inverted cup shape supported by the lower lid 3, and has an opening at its upper bottom, into which the upper heat insulating layer 5a suspended from the upper lid 2 is loose. It is fitted. Further, the heat insulating layer 5 and the upper heat insulating layer 5a are disposed on their respective upper end surfaces with a gap between the upper lids 2.

Reference numeral 11 denotes a pot-shaped protection tube provided inside the heater 6. The protection tube 11 is supported by the lower lid 3 via a support member 13, and the outer circumference of the protection tube 11 is connected to the heater 6 via an insulating member. It is intended to hold the following.

In addition, a gas passage 1 is provided at the center of the bottom of the protection tube 11.
4, the gas passage communicates with a gas discharge port 22 provided in the lower lid 3, and the upper open end of the protective cylinder 11 is located in the loose fitting gap between the heat insulating layer 5 and the upper heat insulating layer 5a. , and is arranged up to the vicinity of the upper lid 2.

A flow path 20 is provided inside the upper lid 2 to allow a cooling medium to flow therethrough.

In this embodiment, the protective cylinder 11 is made of stainless steel (Sus304), but other structural members may be used as long as they have low gas permeability.

The cooling medium flow path 20 provided in the upper lid 2 is a spiral-shaped flow hole provided near the lower end surface of the upper lid 2, and water is used as the cooling medium, but this may also be a water jacket method, or other methods may be used. A cooling medium may also be used.

7 is a container containing molten metal 8 of the impregnating material,
In this embodiment, the crucible is made of a refractory material, and is supported and placed on the bottom of the protective cylinder 11 via a holding member.

Reference numeral 9 denotes an object to be impregnated, and the object 9 to be impregnated is suspended via a support member from the lower end of a push rod 10 inserted freely up and down through the upper lid 2 and the upper heat insulating layer 5a. The push rod 10 can be raised and lowered by a driving means (not shown) connected to the upper end thereof.

The procedure of high-pressure impregnation treatment using the apparatus of this embodiment will be explained below.

The object to be processed 9 is attached to the lower end of the push rod 10, which has been removed from the high-pressure container 1 integrally with the upper lid 2, via a support member outside the high-pressure chamber 4, and is integrated with the upper lid 2 and the upper heat insulating layer 5a. is inserted into the high pressure container 1.

The impregnating material charged in advance into the container 7 from the upper opening of the high-pressure container 1 is connected to the heater 6 using a power supply means (not shown).
is heated and melted to form the molten metal 8. At this melting stage, a vacuum pump (not shown) is used to evacuate the inside of the porous body 9 through the gas passage 14 and the gas outlet 22. The gas in the high pressure chamber 4 and the gas generated during the dissolution process of the impregnating material are discharged to the outside of the system.

After the impregnating material in the container 7 is melted to form a molten metal 8 while continuing to vacuum, the object 9 to be impregnated is lowered via a push rod 10 and immersed in the molten metal 8. The decomposition gas or metal vapor generated from the molten impregnating material 8 up to this stage is discharged out of the system by vacuuming.

Then, a high-pressure medium gas is introduced into the high-pressure chamber 4 through the gas passage 21, and high-pressure impregnation treatment is performed under isotropic high pressure via the high-pressure medium gas.

After the object 9 to be impregnated is impregnated at the set high temperature and high pressure, the object 9 to be impregnated is pulled up from the inside of the molten metal 8 via the push rod 10 and the molten metal 8 is drained. The pressure medium gas is passed through the gas passage 14.
The gas is discharged and depressurized through the gas discharge port 22, and the power supply to the heater 6 is stopped. After the temperature inside the high-pressure chamber 4 falls below a certain temperature, the object to be impregnated 9 is taken out from the high-pressure cylinder 1 together with the upper heat insulating layer 5a through the upper lid 2.

The decomposed gas or metal vapor generated from the molten metal 8 during the above high-pressure impregnation process is blocked by the protective tube 11 and cannot directly flow out to the high-pressure chamber 4 side outside the protective tube 11, and a part of it is mixed with the protective tube 11 and the upper part. It is not allowed to diffuse and flow out from the upper open end of the protective cylinder 11 through the gap with the heat insulating layer 5a.

However, the upper end of the protection tube 11 is
The area near the upper lid 2 is wider than the processing space 12 below due to the cooling effect of the cooling medium inside the upper lid 2 and the heat shielding effect of the heat insulating layer 5 and the upper heat insulating layer 5a. The decomposed gas or metal vapor from the impregnating material molten metal 8 that is at a low temperature and tries to diffuse out from the upper end of the protective tube 11 near the low-temperature upper lid 2 will be converted into a gas or vapor as the temperature decreases. Unable to maintain its shape and deposited,
It adheres to the surface of the component of the low-temperature part and is captured.

In this embodiment, the upper heat insulating layer 5a is suspended from the upper lid 2 via a support member, and the upper heat insulating layer 5a
A gap is also provided between the top cover 2 and the top cover 2, which serves as a low-temperature space between the protective tube 11 and the top heat insulating layer 5.
The decomposed gas or metal vapor that is not going to diffuse and flow out from the upper end of the protective cylinder 11 through the gap with the protective cylinder 11 is deposited and captured in the low-temperature space. Further, a flange-shaped rim is provided on the outer circumferential side of the upper end of the protection tube 11, and this is because a low-temperature gas flow path is formed between the upper surface of the flange-shaped rim and the upper cover 2 due to the cooling effect of the upper cover 2. It is possible to more reliably lower the temperature of the decomposed gas or metal vapor that is trying to diffuse and flow out, and to make the surface on which it is deposited and attached wider to ensure its capture.

As mentioned above, in the high pressure impregnation apparatus of this embodiment, the object to be processed 9 can be easily attached and detached, and the high pressure chamber 4 and the protective tube 1 are
Although a gas flow path is secured to prevent the generation of a pressure difference between the impregnating material and the impregnating material, the heater 6 and the insulating member can be protected from the influence of harmful decomposed gas or metal vapor generated from the molten metal 8 of the impregnating material.

FIG. 2 shows a second embodiment of the present invention, which is the same as the first embodiment shown in FIG. 1 above, except for the configuration and effects described below.

In FIG. 2, reference numeral 30 denotes a holding member for the object to be impregnated 9, whose upper end is held by the upper lid 2, and is inserted through the upper heat insulating layer 5a, and from which the object to be impregnated 9 is suspended. It is meant to be held at the bottom.

Reference numeral 40 denotes a push rod, which is inserted freely up and down through the gas passage 14 provided at the lower part of the holding cylinder 11 and the gas discharge port 22 provided in the lower lid 3 communicating with the passage 14 as a common through hole. A container 7 containing a molten impregnating material 8 is placed on its upper end, and its lower end is connected to a drive means (not shown), thereby making it possible to raise and lower the container 7. .

The high-pressure impregnation device of this second embodiment has the same effect as the first embodiment, and when installing the device,
This configuration is effective when it is difficult to arrange the driving means above.

FIG. 3 is a partial cross-sectional view showing a third embodiment of the present invention, and the configuration other than that shown is the same as that shown in FIG. 1 of the first embodiment, so description and explanation thereof will be omitted here.

In FIG. 3, reference numeral 15 denotes a metal scrubber-like filter, and the filter 15 is ring-shaped and has a ring-shaped recess that fits into the upper end of the protective tube 11 on the lower end surface, and the upper end surface is connected to the upper lid 2. It is removably attached to the upper lid 2 in contact with the upper lid 2.

Further, when the upper lid 2 is fitted into the high pressure container 1, the filter 15 has a concave portion on its lower surface that is connected to the protective tube 11.
The filter 15 is arranged so as to be able to fit into the upper end portion of the protective cylinder 11, and the filter 15 has a flexible structure capable of absorbing thermal expansion and contraction of the protective cylinder 11.

In this embodiment, the filter 15 is made of a metal scrubber-like material made of thin stainless steel (Sus304) wire, but it may be made of other structural members as long as it is porous and has a soft structure as a whole. good.

In the configuration of this embodiment, the high pressure chamber 4 and the protection tube 1
A gas passage between the processing space 12 and the filter 15
The protection cylinder 11 is secured by the differential pressure between the two.
The crushing of the impregnating material can be completely prevented, and the decomposed gas or metal vapor from the molten impregnating material flowing out from the processing space 12 through the gap between the upper heat insulating layer 5a and the protective cylinder 11 is in contact with the upper lid and is at a low temperature. Filter 15
When it comes into contact with the surface of a component, its temperature decreases, and it is deposited on the surface, where it adheres and is captured.

After the treatment, the filter 15 can be taken out of the high-pressure vessel 1 together with the upper lid 2, the material to be treated, etc., and replaced.

As described above, when the filter 15 attached to the upper lid 2 of this embodiment is applied to the apparatus of the first embodiment of the present invention, the effect is that the molten metal of the impregnating material 8
This ensures the effect of protecting the heater 6 and the insulating members from harmful decomposition gas or metal vapor generated from the impregnating material, and also makes it easier to remove the components of the impregnating material that are deposited and adhered as contaminants. .

Note that this embodiment can obtain similar effects even when applied to the apparatus of the second embodiment described above.

FIG. 4 is a partial cross-sectional view showing a fourth embodiment of the present invention, and the configuration other than that shown is the same as that shown in FIG. 1 of the first embodiment, so description and explanation thereof will be omitted here.

In FIG. 4, 16 is an inner fin, and 17 is an outer fin, each of which is ring-shaped and made of a thin plate component, and is detachably attached to the upper lid 2 via a holding member. Also, these inner and outer fins 16, 17
is arranged concentrically with the protection tube 11, and the inner fin 1
6 is on the upper heat insulation layer 5a, and the outer fin 17 is on the heat insulation layer 5.
A large number of sheets are arranged on the top with the same gap between each other.

Note that these inner and outer fins 16 and 17 are removably arranged together with the upper lid 2.

In this embodiment, these inner and outer fins 16,
17 is stainless steel (Sus304) steel plate (0.5mm thickness)
Although the gap between them was set at 4 mm, other structural members and other shapes may be used as long as they do not prevent gas flow and can ensure a large surface area in the upper space.

In the configuration of this embodiment, as in the third embodiment described above, a gas passage between the high pressure chamber 4 and the processing space 12 in the protection tube 11 is secured, and the decomposition gas or metal vapor flowing out from the processing space 12 is removed from the upper lid 2. When attached to the surface of the inner and outer fins 16 and 17, which are at low temperatures, the temperature decreases, and the particles are deposited, attached, and captured on the surfaces. Furthermore, these inner and outer fins 16, 17
can be replaced outside the high-pressure vessel 1 after the impregnation treatment, as in the third embodiment described above.

As described above, the inner and outer fins 17 and 18 attached to the upper lid 2 of this embodiment have the effect that when applied to the apparatuses of the first and second embodiments of the present invention, that is, the fins generated from the molten metal 8 of the impregnating material. This further ensures the effect of protecting the heater 6 and the insulating member from harmful decomposed gas or metal vapor.

Note that this example showed particularly high effects in impregnating an impregnating material that generates metal vapor.

FIG. 5 is a partial cross-sectional view showing a fifth embodiment of the present invention, and the configuration other than those not shown is the same as that shown in FIG. 1 of the first embodiment, so description and explanation thereof will be omitted here. .

In FIG. 5, reference numeral 25 is a thin cylinder made of a material with good thermal conductivity, and one end of the cylinder 25 is removably attached to the upper cover 2, and is placed above the heat insulating layer 5 and concentrically with the protective cylinder 11. It is arranged in

Reference numeral 26 denotes a grooved flange, and the grooved flange 26 is ring-shaped and has a concave groove on its upper surface that fits loosely with the cylinder 25 with a gap therebetween. It is detachably attached to the upper end and placed on the heat insulating layer 5.

Note that the cylinder 25 and the grooved flange 26 are connected to each other when the upper lid 2 is fitted onto the high pressure container 1.
The lower ends of the grooved flange 26 are inserted into the grooves of the grooved flange 26 with a gap between them so that they can be loosely fitted therein.

In this embodiment, the cylinder 25 was made of a low carbon steel plate, and the grooved flange 26 was made of a stainless steel (Sus304) plate.
These may be other members with low gas permeability. Further, although the cylinder 25 and the flange 26 each have one concave groove, that is, a pair of concave grooves, they may be concentrically arranged in a plurality of pairs. Although the upper heat insulating layer 5a is attached directly to the upper lid 2, it may be arranged with a gap between them.

In the configuration of this embodiment, as in the third embodiment described above, a gas passage between the high pressure chamber 4 and the processing space 12 in the protection tube 11 is secured, and the decomposition gas or metal vapor flowing out from the processing space 12 is removed from the upper lid 2. It is attached to the cylinder 25 and contacts the low-temperature surface of the cylinder 25 to reduce its temperature, and is deposited and captured on the cylinder surface or the upper surface of the grooved flange 26. Moreover, the concave grooves of the grooved flange 26 can accumulate liquid fluid. Note that these cylinders 25 and grooved flanges 26
is the high pressure vessel 1 after the impregnation treatment as in the fourth embodiment described above.
It can be replaced outside.

As described above, when the configuration of this embodiment is applied to the devices of the first and second embodiments, the effect is that the heater 6 and the insulation are protected from harmful decomposed gas or metal vapor generated from the molten metal 8 of the impregnating material. To ensure the effect of protecting members.

Note that this example showed particularly high effects in impregnating a pitztal-based impregnating material that generates decomposed gas.

FIG. 6 is a partial cross-sectional view showing a sixth embodiment of the present invention, and the configuration other than that shown is the same as that shown in FIG. 1 of the first embodiment, so description and explanation thereof will be omitted here.

In FIG. 6, reference numeral 27 denotes an upper low temperature chamber which is a member with good thermal conductivity. It is attached integrally to the layer 5a, its outer peripheral side is placed on the heat insulating layer 5, and has a space on the lower surface in which the end of the protection cylinder 11 is attached with a gap therebetween. Reference numeral 28 denotes a ring-shaped felt body that becomes a heat-resistant flexible member, and the felt body 28 is placed between the lower end of the outer periphery of the upper cold room 27 and the upper end surface of the heat insulating layer 5, and the upper corner 2 is attached to the high-pressure container 1. It is arranged so as to be in contact with the upper low temperature chamber 27 and the heat insulating layer 5 when fitted.

In the configuration of this embodiment, the upper low temperature chamber 25 is for depositing and capturing metal vapor that is not to be diffused out from the processing space 12 in the low temperature chamber 25, and the felt body 28 is thermally insulated from the protection tube 11. The convection of the pressure medium gas by the upward flow of the pressure medium gas by the heater 6 between the layers 5 and the downward flow between the heat insulating layer 5 and the high pressure vessel 1 is controlled, thereby improving thermal efficiency during pressurized heat treatment. In this example, the pressurized heat treatment is performed at a relatively high pressure, the convection of the pressure medium gas is intense, and metal vapor is generated relatively little under the high pressure of the pressure medium gas. It is effective for processing.

〔Effect of the invention〕

As described above, the high pressure impregnation apparatus according to the present invention is
A heat insulating layer 5 and a heater 6 are provided in a high pressure chamber 4 defined by a high pressure container 1, an upper lid 2, and a lower lid 3.
Regarding an impregnating apparatus that immerses an object 9 to be treated in a molten metal 8 of an impregnating material in a processing space 12 surrounded by The upper heat insulating layer 5a can be inserted and removed integrally with the upper cover 2, and the upper cover 2 is provided with a cooling means to maintain a low temperature in the vicinity of the upper cover 2 above the high pressure chamber 4, and The heater 6 has a small-shaped protection cylinder 11 with low gas permeability, that is, a processing space in which the container 7 containing the molten impregnating material 8 is placed, and its upper end is connected to the upper heat insulating layer 5a. The protective tube 11 is disposed through the fitting part to the vicinity of the upper lid 2, has a gas passage 14 at the bottom that communicates with the gas outlet 22 of the lower lid 3, and has a gas passage formed at the upper part. It is effective.

First, since the upper heat insulating layer 5a can be inserted and removed integrally with the upper lid 2, the impregnating material can be easily supplied to the container 7 from the upper opening of the high pressure cylinder 1, and the object 9 to be impregnated can be inserted into the upper lid 2. By holding the upper lid 2
By integrally inserting and removing the impregnating material, the impregnating material can be supplied and the object 9 to be impregnated can be inserted and removed efficiently.

and a processing space 12 surrounded by a heater 6;
In other words, the decomposed gas or metal vapor generated from the molten impregnating material 8 in the protective tube 11 during the impregnation process is
It cannot flow directly to the heater 6 side because it is blocked by the protection tube 11, and when trying to diffuse and flow out from the upper opening of the protection tube 11, it has to flow out through the vicinity of the upper lid 2 where the temperature is low. The temperature decreases in the vicinity of the upper lid 2, and the gas or vapor cannot be maintained in the form of a gas or vapor, and it is deposited and cannot diffuse and flow out. Due to these effects, it cannot reach the heater 6 side outside the protective cylinder 11.

Furthermore, a gas passage is formed in the upper part of the protection tube 11, and the pressure difference between the high pressure chamber 4 and the inside of the protection tube 11 is always approximately equal, and the protection tube 11 becomes a thin component. Even if it is a metal, it will not collapse due to the pressure difference during pressure increase and decrease during pressure heat treatment.

Therefore, the high-pressure impregnation apparatus according to the present invention can efficiently insert and remove the impregnating material and the material to be impregnated, and at the same time, during the impregnation process, the molten metal 8 of the impregnating material is freed from harmful decomposed gas or It is possible to stably treat impregnating materials that generate metal vapor, which is of great practical benefit as it can further expand the range of its application.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of main parts showing a first embodiment of the present invention. FIG. 2 is a front sectional view of main parts showing a second embodiment of the present invention. FIG. 3 is a partial front sectional view showing a third embodiment of the present invention. FIG. 4 is a partial front sectional view showing a fourth embodiment of the present invention. FIG. 5 is a partial front cross-sectional view showing a fifth embodiment of the present invention. FIG. 6 is a partial front sectional view showing a sixth embodiment of the present invention. FIG. 7 is a front sectional view of the main parts of a conventional device. FIG. 8 is a front sectional view of the main parts of a conventional device. DESCRIPTION OF SYMBOLS 1... High pressure container, 2... Upper lid, 3... Lower lid, 4... High pressure chamber, 5... Heat insulating layer, 5a... Upper heat insulating layer, 6... Heater, 7... Container, 8... Molten metal of impregnating material, 9... Impregnated object , 11...Protective tube, 12...Processing space, 14...Gas passage, 20...Cooling medium flow path, 21...Pressure gas inlet, 22...Pressure gas outlet.

Claims (1)

[Claims] 1. In a high pressure chamber 4 defined by a high pressure container 1 and an upper lid 2 and a lower lid 3 that seal the upper and lower openings of the high pressure container 1, a heat insulating layer 5 and a heater 6 are installed inside the high pressure chamber 4. The high-pressure chamber 4 is provided with a gas inlet 21 and a gas outlet 22, and a container 7 for storing molten impregnating material 8 is placed in the processing space 12 surrounded by the heater 6. The object to be impregnated 9 is suspended above the container 7 via a holding member, and the container 7
A vertical moving means is provided for vertically moving one or both of the impregnated body 9 and the impregnated body 9 toward each other,
In this apparatus, the object to be impregnated 9 is immersed in the molten metal 8 of the impregnating material and impregnated under high pressure via a pressure medium gas introduced into the high pressure chamber 4. A cooling medium flow path 20 is provided, and the flow path 20 communicates with a cooling medium supply and discharge means, and the heat insulating layer 5 has an inverted cup shape and has an opening at its upper bottom. An upper heat insulating layer 5a attached to the upper cover 2 is loosely fitted into the upper bottom opening of the heat insulating layer 5, and the heat insulating layer 5 is disposed with a gap between its upper end surface and the upper cover 2. The gas discharge port 22 is provided in the lower lid 3, and a cup-shaped protection tube 11 with low gas permeability is provided inside the heater 6.
A gas passage 14 communicating with the gas discharge port 22 of the lower lid 3 is provided at the bottom of the protective tube 1, and the upper end of the protective tube 11 is connected to the gas passage 14 through the loose fitting gap between the heat insulating layer 5 and the upper heat insulating layer 5a. A high-pressure impregnation device characterized in that it is disposed close to the upper lid 2 and that a gas passage communicating with the high-pressure chamber 4 is formed in the upper part of the protective cylinder 11.