JPH02229699A - Hot press device - Google Patents

Abstract

PURPOSE:To prevent the contamination in a furnace and to prolong the life of the furnace by covering the circumference of a work with muffle walls and hot pressing the work while discharging the inside of the muffle walls with the inside of the muffle walls as a low-pressure side and the outside as a high- pressure side. CONSTITUTION:A mold M contg. the sample W is put into the muffle walls 30 and a vessel 21 is hermetically closed by mounting a lower cap 30b to a muffle body 30a by a clutch 24. A heater 29 is operated to generate heat while the inside of the vessel is evacuated by connecting a vacuum pump to the down stream side of a control valve 40. While a carrier gas is introduced from a gas feed nozzle 36 into a heating chamber R, an upper press ram 26 is lowered to press the sample W. The carrier gas entering in the inside of the muffle walls 30 is released together with the gas released from the sample W to the outside from a discharge nozzle 38 by passing a condensate removing device 39 and a control valve 40.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a hot press apparatus in which a heating chamber is formed in a container, and a workpiece is pressed between a pair of opposing press rams in the heating chamber. Regarding.

[Prior art] This type of hot press equipment heats and presses the processed material filled in a formwork in the axial direction, thereby performing pressure sintering of powdered metals and ceramics, diffusion bonding of metals, and composite materials. It is widely used as a device for molding heat treatment, etc.

As shown in FIG. 5, the conventional hot press apparatus has a heating chamber R surrounded by a heat insulating wall 2 formed in a container 1, and a pair of upper and lower press rams 3.4 facing each other in the heating chamber R. are doing. A heater 5 is provided in the heating chamber R, and a container 1
is provided with an air supply port 6 for supplying carrier gas into the heating chamber R through a gap in the heat insulating wall 2, a carrier gas exhaust port 8, and a vacuum exhaust port 7. And between Breath Ram 3.4, there are 9 dice and 10 upper and lower punches.
．． Mold M filled with sample (workpiece) W between 11 and 11
is now positioned.

Such a hot press apparatus presses the sample W under vacuum heating conditions or atmospheric heating conditions. That is, in the case of vacuum heating, the gas is exhausted from the vacuum exhaust port 7, and in the case of atmospheric heating, the carrier gas is introduced from the air supply port 6 and exhausted from the exhaust port 8.

By the way, the sample W to be pressed has various properties, for example, a large amount of gas is generated during pressing,
In some cases, the molten material flows out from the mold M, or a conductive substance contained in the generated gas components condenses and adheres in the low-temperature area.

Conventional hot press apparatuses were not equipped with a configuration to deal with such generated substances from the sample W.

[Problems to be Solved by the Invention] The conventional hot press apparatus as described above has the following problems.

(2) The molten material flowing out from the mold M adheres to furnace materials such as the press ram 34, heater 5, and heat insulating wall 2, causing deterioration and wear.

(2) Conductive materials may condense and adhere to low-temperature parts such as the electrode 12 of the heater 5, causing a short circuit accident due to poor insulation.

■High boiling point substances adhere to the vacuum exhaust system, leading to blockage of piping.

■The inside of the furnace becomes contaminated.

This invention aims to solve such problems by removing harmful substances (gases, liquids, melts, solids, etc.) generated from the sample W, and thereby avoiding any adverse effects on the inside and outside of the furnace. The purpose is to provide a new hot press device that can perform

[Means for Solving the Problems] The pot press apparatus of the present invention is a hot press apparatus in which a heating chamber is formed in a container, and a workpiece is pressed between a pair of opposing press rams in the heating chamber. , a matzuru wall is provided inside the heating chamber that surrounds the object to be processed and is penetrated by the pair of press rams; an exhaust nozzle that communicates with the outside of the container is provided in the matzuru wall; The apparatus is characterized by comprising a differential pressure generating means for creating a differential pressure outside the heating chamber and between the inside of the heating chamber and the inside of the pine-full wall, making the former a high-pressure side and the latter a low-pressure side.

[Function] The hot press device of the present invention covers the object to be processed with a pine full wall, and sets the inside of the pine full wall as a low pressure side and the outside as a high pressure side, and presses the object to be processed while exhausting the inside of the pine full wall. Hot press things.

The Matsufuru wall prevents the waste from the material being processed from leaking and spreading into the furnace, and the pressure difference between the inside and outside of the Matsufuru wall is used to force the waste from the material to exit the furnace. to be discharged.

[Embodiment] Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 4.

FIG. 1 and FIG. 2 are diagrams for explaining a first embodiment of the present invention. The hot press apparatus of this embodiment has a configuration suitable for a hot press apparatus in a heated atmosphere under normal pressure or pressurization.

In these figures, 21 is a container, and this container 21 includes a cylindrical container main body 21a held by a frame 22, and a container top attached to the upper part of this container main body 21a! ! 2lb and
The bottom of the container attached to the bottom of the container body 21a! 21c. Under the container! 21c is placed on a lifter 23, and is detachably attached to the lower part of the container body 21a by a clutch 24.

The container upper lid 2lb is equipped with an upper press ram 26 that is moved up and down by a press cylinder 25, and the lower lid 2lb is equipped with an upper press ram 26 that is moved up and down by a press cylinder 25.
1c is equipped with a lower press ram 27.

Inside the container 2I, there are a heat insulating wall body part 28a1 and a heat insulating wall soil part 28.
heating chamber R surrounded by b1 and the insulation wall lower lid 28c
is formed, and a heater 29 is attached at a fixed position within the container 21. Insulating wall trunk 28a and insulating wall upper part 2
8b is positioned and held in the container 2l in a combined state, and the insulating wall lower lid 28c is attached to the lower container M2.
It is held on the lc. The lower insulation wall M28c is raised and lowered together with the container lower lid 21C by a lifter 23, and when raised as shown in FIG.
The lower part of the heat insulating wall body 28a is closed to form a heating chamber R, and when it is lowered as shown in FIG. 2, it is separated from the heat insulating wall body 28a and the heating chamber R is released.

Inside the heating chamber R, there is a Matsufuru main body 30a and a Matsufuru lower lid 3.
A heat-resistant pine-full wall 30 closed by 0b is configured. The Matsuful main body 30a has a box shape with an opening at the bottom, and is connected to the insulation wall soil part 2 by a plurality of hanging rods 3l.
It is suspended and held from 8a. Matsuful lower i30b
is the support ring 3 fitted to the lower press ram 27.
2 and supported on the bottom of the container. ! 2 1 a, it is raised and lowered by a lifter 23.

The Matsuful lower lid 30b closes the opening of the Matsuful main body 30a when the lifter 23 rises as shown in FIG. 1, and separates from the Matsuful main body 30a when it descends as shown in FIG. ing.

The upper press ram 26 passes through the Matsuful main body 30a downwardly, and the lower press ram 27 passes through the Matsuful lower body. ! ! t. 3
0 b upwardly, so that the tips of these pairs of press rams 26 and 27 face each other within the pine full wall 30 . A mold M consisting of a combination of a die 33 and upper and lower punches 34 and 35 is detachably attached to the tip of the lower press ram 27. A sample (processed material) W is placed in this mold M.

In the figure, 36 is an air supply nozzle, 37 is a vacuum exhaust nozzle, and 38 is an exhaust nozzle. The air supply nozzle 36 is connected to a carrier gas supply system (not shown) and guides the carrier gas into the heating chamber R. Further, the vacuum exhaust nozzle 37 is connected to a vacuum bomb (not shown),
The inside of the container 21 is evacuated to create a vacuum state. Further, the exhaust nozzle 3B is connected to a gas exhaust system through a condensate removal device 39 and a control valve 40, and is configured to exhaust gas within the Matsufuru wall 30 to the outside. The condensate removal device 39 removes the sample W contained in the exhaust gas.
The product is cooled and condensed to remove it. The control valve 40 is controlled by a pressure regulator 41, and the pressure regulator 41 is connected to the exhaust nozzle 38.
The opening degree of the control valve 40 is controlled based on a detection signal from a pressure sensor 42 that detects the internal pressure.

Next, the operation of the hot press apparatus of this embodiment will be explained according to the working procedure.

■Charging mold M First, a mold M containing a sample W is prepared.

Then, as shown in FIG. 2, the lifter 23 is lowered to place the mold M on the lower press ram 27.

Then, raise the lifter 23 as shown in Figure 1,
The lower part of the container main body 2l is closed by the container lower lid 2lc, the lower part of the heat insulating wall shell 28a is closed by the heat insulating wall lower N28c, and the matsufuru main body 30a is closed by the matsufuru lower M30b. Thereby, the mold M is located inside the pine full wall 30.

Then, by the clutch 24, the Matsuful lower M30b
is attached to the Matsuful main body 30a, and the container 2L is sealed.

■Hot press for atmospheric heating This hot press includes the following: i [Hot press in normal pressure or pressurized atmosphere] and ; 1 "Hot press in reduced pressure atmosphere."

i. "Hot press in normal pressure or pressurized atmosphere" heater 2
9 and introducing carrier gas (N, Ar, etc.) at a predetermined pressure and flow rate into the heating chamber R from the air supply nozzle 36, the upper press ram 26 is lowered to press the sample W.

The carrier gas introduced into the heating chamber R is applied to the gap between the Matsufuru main body 30a and the Matsufuru lower lid 30b, the gap between the Matsufuru main body 301 and the upper press ram 26, and the gap between the Matsufuru lower lid 30b and the lower press ram 27. It enters the inside of the Matsuful wall 30 through the gap etc. The carrier gas that has entered the inside of the Matsufuru wall 30 is transferred to the exhaust nozzle 3 along with the gas released from the sample W (hereinafter referred to as "out gas").
8 through a condensate removal device 39 and a control valve 40 to the outside air. In other words, the carrier gas is forced and exhausted by the pressure difference between the pressure pt inside the masophul wall 30 and the pressure P2 (>pl) outside the masophul wall 30. Fluctuations in the pressure PI due to the generation of outgas are detected by the pressure sensor 42, and the pressure regulator 4 adjusts the Un degree of the control valve 40 according to the detected pressure, thereby keeping the pressure P constant.

The outgas released from the sample W passes through the condensate removal device 39 together with the carrier gas and is separated and removed, and the sample W is hot-pressed in a normal pressure or pressurized atmosphere.

The reason for introducing the carrier gas into the heating chamber R is that it is more advantageous than introducing the carrier gas into the container 21 outside the heating chamber R (hereinafter referred to as "outside the heating chamber R"). be. That is, if the carrier gas is introduced outside the heating chamber R, the carrier gas will be
After filling the space outside the heating chamber R to create an internal pressure, the heat insulating wall body 2.8a, the heat insulating wall upper part 28b1 and the heat insulating wall lower cover 2
This is because the carrier gas enters the heating chamber R through the gap at 8C, which requires a large amount of carrier gas and also increases the variation in the internal pressure of the pine-full wall 30.

iiJ In the case of hot pressing in a reduced pressure atmosphere: A vacuum pump is connected to the downstream side of the control valve 40 in the gas exhaust system, and the hot pressing as described above is carried out while exhausting with this vacuum pump. Therefore, sample W
will be hot pressed in a reduced pressure atmosphere.

■After releasing the mold M take-out clutch 24 and unsealing the container 2L,
, lower the lifter 23 as shown in FIG. Along with the lifter 23, the lower container M21c and the lower lid 28c of the insulation wall
，Matsuful bottom! i30b and mold M descend,
Mold M will be in charge.

FIG. 3 is a diagram for explaining a second embodiment of the invention.

The hot press apparatus of this embodiment has a configuration suitable for hot pressing when the gas inside and outside the pine full wall 30 is different.

That is, in the case of this embodiment, the carrier gas nozzle 36 extends to the inside of the pine full wall 30, and c
(Reactant gases such as 2g, Ot, H, etc. are directly applied to the Matsufuru wall 3.
Introduce within 0. Further, an inert gas such as N, Ar, etc. is introduced to the outside of the heating chamber R from an air supply nozzle 50 newly provided in the container body 21a. 5l is a differential pressure sensor,
It detects the pressure difference between the inside and outside of the pine full wall 30, and a pressure regulator 41 controls the opening degree of the control valve 40 based on the detected signal.

The hot press apparatus of this embodiment performs hot press in a carrier gas atmosphere at normal pressure, pressurized pressure, or reduced pressure as follows.

■Hot press air supply nozzle 36 in normal pressure or pressurized atmosphere
A carrier gas at a predetermined pressure and flow rate m is introduced directly into the pine-full wall 30, and at the same time, N is introduced from the air supply nozzle 50
A gas having a predetermined pressure and flow rate, such as t, Ar, etc., is introduced to the outside of the heating chamber R. Then, the sample W is hot-pressed by setting the downstream side of the control valve 40 in the gas exhaust system to external pressure.

The carrier gas within the pine full wall 30 is forced out and exhausted from the exhaust nozzle 38.

Further, the gas introduced to the outside of the heating chamber R enters into the Matsufuru wall 30 through a gap in the wall that constitutes the heating chamber R and a gap in the Matsufuru wall 30,
The gas is expelled from the exhaust nozzle 38 together with the carrier gas and exhausted.

Further, together with these gases, generated substances from the sample W are exhausted and separated and eliminated by the condensate removal device 39.

The pressure regulator 41 controls the opening degree of the control port-inlet valve 40 so as to maintain a constant pressure inside the pine full wall 30.

As described above, in the case of this embodiment, in order to directly introduce the carrier gas into the inside of the Matsuful wall 30, the outer members of the Matsuful wall 30 (for example, the heater 29, the heat insulating wall body 28a,
Insulating wall upper part 28b, insulating wall lower lid 28c, container 21
etc.) is applied when corrosion, oxidative wear, etc.

(2) A vacuum pump is connected to the downstream side of the control valve 40 in the hot pressing gas exhaust system in a reduced pressure atmosphere, and the hot pressing described above is carried out while exhausting with this vacuum bomb. Therefore, the sample W will be hot pressed in a reduced pressure atmosphere.

FIG. 4 is a diagram for explaining a third embodiment of the invention.

The hot press apparatus of this embodiment has a configuration suitable for hot press in a vacuum.

That is, a vacuum pump 61 is connected to the downstream side of the control valve 40 in the gas exhaust system, and this vacuum pump 6l
The inside of the pine full wall 30 is vented by this. Further, the pressure regulator 41 controls the opening degree of the control valve 40 based on a detection signal from a vacuum gauge that detects the degree of vacuum within the pine full wall 30.

In the case of this example, hot pressing in vacuum is carried out as follows.

[Hot Pressing in Vacuum] The inside of the container 21 is evacuated from the evacuation nozzle 37, and then the sample W is hot pressed while the inside of the Massoflu wall 30 is evacuated using the vacuum bomb 6l. The generated products from the sample W are exhausted through the exhaust nozzle 38 and separated and eliminated in the condensate removal device 39. Pressure regulator 41
controls the opening degree of the control valve 40 so as to keep the internal pressure of the pine full wall 30 constant.

Note that the hot press apparatus of the present invention is not limited to a vertical type having a pair of press rams 26 and 27 on the upper and lower sides, but may be a horizontal type having a pair of press rams 26 and 27 on the left and right sides.

In addition, as a differential pressure generating means that makes the inside of the Matsuful wall 30 a low pressure side and the outside thereof a high pressure side, the Matsuful wall 30
It may be a pump that forcibly exhausts the inside of the manful wall 30, a bomb that forcibly supplies gas to the outside of the manful wall 30, or a combination of these.
Any material may be used as long as it can exhaust air from the exhaust nozzle 38 with the inside of the 0 as the low pressure side.

Furthermore, in the above-mentioned embodiment, the sample W is placed in the mold M and the sample W is handled together with the mold M for loading and unloading, but instead of loading and unloading the sample W by itself. Good too.

[Effects] As explained above, the hot press device of the present invention has the following effects:
The object to be processed is covered with a Matsufuru wall, the inside of the Matsufuru wall is set as the low pressure side, and the outside thereof is set as the high pressure side, and the workpiece is hot pressed while the inside of the Matsufuru wall is evacuated. It is possible to achieve the following effects.

■The Matsufull wall prevents the waste from the material to be processed from leaking and spreading into the furnace, and the pressure difference between the inside and outside of the manful wall is used to forcibly discharge the material from the material to be processed. , it is possible to prevent contamination inside the furnace and extend the life of the furnace.

(2) Since the discharge step for removing waste from the object to be treated is carried out simultaneously with the hot press step, there is no need to carry out the discharge step in a separate furnace, and the processing steps can be shortened.

■Since it has the function of removing waste from the object to be processed, the scope of use of the hot press method can be expanded.

■Also, by providing a charging/unloading port that opens in the direction of loading/unloading the material to be processed on the Matsuful wall and equipping this charging/unloading port with a lid that can be opened and closed, it is possible to charge/unload the material to be processed. It can be made easy.

[Brief explanation of the drawing]

FIG. I and FIG. 2 are diagrams for explaining the first embodiment of the present invention, in which FIG. 1 is a longitudinal cross-sectional view in a state where the workpiece is loaded, and FIG. It is a longitudinal cross-sectional view at the time of taking out a person. FIGS. 3 and 4 are longitudinal cross-sectional views of essential parts for explaining other different embodiments of the present invention. FIG. 5 is a schematic configuration diagram for explaining a conventional example. I... Container, 21a... Container body,
1b... Container top lid, 21c... Container bottom lid, 3... Lifter 24... Clutch, 5... Press cylinder, 6. ...Upper press ram, 7...Lower press ram, 8a...Insulation wall trunk, 8b...Insulation wall upper part, 8c...Insulation wall Lower lid, 29... Heater, 30... Matsuful wall, 30 Yu... Matsuful main body, 30b... Matsuful lower lid, 31...・Hanging rod, 33...Dice, 34...Upper punch, 35...
Lower punch, 36... Air supply nozzle, 38...
...Exhaust nozzle, R...Heating chamber, M...
...Mold, W...Sample (object to be processed). Applicant Ishikawajima Harima Heavy Industries Co., Ltd. Figure 3 Figure 4

Claims (2)

[Claims] (1) In a hot press device in which a heating chamber is formed in a container and a workpiece is pressed between a pair of opposing press rams in the heating chamber, a portion around the workpiece is inside the heating chamber. a matzuru wall that covers the matzuru wall and is penetrated by the pair of press rams; an exhaust nozzle that communicates with the outside of the container is provided in the matzuru wall; A hot press device characterized in that it is equipped with differential pressure generating means that creates a pressure difference between the inside and the inside, making the former a high pressure side and the latter a low pressure side. (2) The first aspect of the present invention is characterized in that the matsufuru wall is provided with a charging/unloading port for the processed material that opens in the loading/unloading direction of the processed material, and the charging/unloading port is provided with a lid that can be opened and closed. Hot press equipment as described.