JP2912493B2 - Hot press equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot press apparatus used for press-forming a multilayer substrate such as a laminated printed wiring board.

[0002]

2. Description of the Related Art Conventionally, various types of hot press apparatuses used for press molding of a multilayer substrate such as a laminated printed wiring board are known. In these conventional hot press apparatuses, there has been a problem in that the heat from the heated hot plate is radiated through the outer shell of the hot press apparatus, resulting in a decrease in thermal efficiency. In order to prevent this heat radiation, it is effective to cover the hot press device with, for example, a heat insulating material.
However, the conventional hot press device has a portion that is difficult to cover with a heat insulating material, such as a shutter and a movable range thereof, and even with the heat insulating material, heat radiation from the hot press device cannot be sufficiently prevented.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a hot press apparatus capable of preventing heat radiation from the outer shell of the hot press apparatus and preventing a decrease in thermal efficiency.

[0004]

The present invention adopts the following constitution as means for solving the above-mentioned problems. That is,
The hot press device according to the present invention includes a fixed plate, a fixed hot plate mounted on the fixed plate, and a movable plate that is reciprocally movable to be pressed or separated from the fixed plate and driven by a hydraulic cylinder. A board, a movable hot plate mounted on the movable board,
An intermediate hot plate that is disposed between the fixed and movable hot plates and reciprocates in accordance with the reciprocating motion of the movable plate is housed in a closed and decompressible container, and the workpiece inserted between the hot plates is provided. In a hot press machine capable of hot press molding,
The container has an opening through which the workpiece can be loaded and unloaded on a side surface thereof, and has a cylindrical shape that maintains a tensile strength against a mold clamping force when the movable platen is pressed against the fixed platen. A substantially cylindrical shape comprising a body, a cylindrical shutter mounted on the outer periphery of the body and closing and opening the opening in accordance with vertical movement, and a semi-ellipsoidal end plate connected to an upper end of the body. The fixed plate is fixed to the end plate, and a plurality of guide rails are provided around the movable plate along the reciprocating direction of the movable plate, and the guide rail is provided on the movable plate and the intermediate heating plate. By providing a sliding part that slides closely with
The movable platen and the intermediate heating plate are reciprocally movable along the guide rails, and further house and open the pressure vessel,
It is characterized in that an outer container capable of being closed and decompressed is provided.

[0005]

Before the hot press, the workpiece is inserted between the hot plates. Subsequently, the shutter is opened to seal the outer container while the inner container and the outer container are in communication with each other, and the pressure inside the inner and outer containers is reduced. The degree of pressure reduction depends on the type of the workpiece, but is preferably in the range of about 30 Torr to 0.5 Torr.

The movable plate located at a position opposite to the fixed plate fixed to the inner container is driven by a hydraulic cylinder and moves in a direction toward the fixed plate. The intermediate hot plate also moves in the same direction according to the movement of the movable platen. When the contact pressure between each hot plate and the workpiece reaches a predetermined value, the movement of the movable plate stops, and the workpiece is pressurized at the predetermined contact pressure.

Next, the workpiece is heated via the hot plate. After the workpiece is softened by the heating, the shutter is closed to close the inner container. Thereafter, the hydraulic cylinder is operated to pressurize at a predetermined pressure for a predetermined time. The pressurizing time is preferably in the range of 30 to 90 minutes, depending on the type of the workpiece. The pressure at this time depends on the type of the material to be processed.
A range of 25 kg / cm ² is preferred.

[0008] The inner container has a cylindrical body for maintaining a tensile strength against a mold clamping force when the movable board is pressed against the fixed board, and a semi-elliptical body connected to the upper end of the body. A substantially cylindrical shape having a head plate and a fixing plate were fixed to the head plate. This realizes a structure in which the inner container receives the mold clamping force when the movable platen is pressed against the fixed platen by the hydraulic cylinder, and the stay provided in the hot press device of the related art becomes unnecessary. Becomes easier.

After a lapse of a predetermined time, the temperature of the hot plate is lowered to a temperature lower than the temperature at which the work material solidifies, and the hardening is waited. While waiting for the curing, the predetermined pressure is maintained. After the work material has hardened, the movable platen is moved in a direction away from the fixed platen, and the work material is cooled down to the product take-out temperature while being placed on the hot plate.

After cooling, the inner container is released from the hermetic seal, and the outer container is also opened to take out the processed material as a product. Since the inner container and the outer container have a double structure, the two containers are connected to each other to reduce the pressure in common, and then the communication is cut off, and the hot press is performed while a vacuum region is formed between the inner container and the outer container. It becomes possible.

Heat from the hot plate at the time of hot pressing reaches the inner container, but since a vacuum region is formed between the inner container and the outer container, convection from the inner container to the outer container and heat transfer by conduction are performed. Is prevented. Therefore, the amount of heat radiated through the outer shell of the hot press device is reduced, and a decrease in thermal efficiency is prevented.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to a preferred embodiment. As shown in FIGS. 1 and 2, the hot press apparatus 1 of the present embodiment includes an inner container 3 containing an internal mechanism for press working inside an outer container 5 and a H-shaped steel base 7. It is configured to be mounted.

First, the inner container 3 and an internal mechanism for press working housed in the inner container 3 will be described. The inner container 3 includes a substantially square bottom plate 9 and a head plate 1.
1 is connected by a cylindrical body 13. End plate 11
Is a semi-ellipsoid and has a square flange portion 11a on the outer edge.

The bottom plate 9 is connected to the base 7 via bolts. Heat medium pipes 14a and 14b are hermetically attached to the bottom plate 9 via seal members 15a and 15b.
The heat medium pipes 14a and 14b penetrate the bottom plate 9 so that the heat medium can be supplied to and taken out of the inner container 3.

A hydraulic cylinder 17 is mounted at the center of the bottom plate 9. A ram 19 is inserted through the hydraulic cylinder 17. The hydraulic cylinder 17 can supply and discharge hydraulic oil via a hydraulic oil supply path (not shown). With this operation, the operating oil in the hydraulic cylinder 17 is supplied and discharged, and
The ram 19 can be raised and lowered.

A cooling pipe 21a is provided around the hydraulic cylinder 17. Cooling pipe 21a
The coolant supplied and discharged through the coolant holes 22 flows through a coolant supply path (not shown) so that the hydraulic cylinder 17 can be cooled. The coolant hole 2
2 and the refrigerant supply path are air-tightly and liquid-tightly connected, so that the sealing of the inner container 3 does not become an obstacle.

A movable plate 23 having a substantially square cross section is attached to the tip of the ram 19. The movable platen 23 and the ram 19 are concentric, and the movable platen 23 rises and falls in accordance with the rise and fall of the ram 19 by the hydraulic cylinder 17. FIG. 3 shows a partial cross-sectional view.
, Sliding members 25 having an L-shaped cross section are provided at two locations on each of two sides of the movable platen 23 facing each other, for a total of four locations.
It is provided so that one end of the L-shape protrudes from the side surface. The projecting end has a tapered sliding surface 25a.
Are formed.

A movable hot plate 27 having a substantially square cross section is mounted on the upper surface of the movable platen 23. Movable hot plate 27
Can be raised and lowered together with the movable platen 23.
An intermediate heating plate 29 is provided above the movable heating plate 27 at an interval. Although a partial cross-sectional view is shown in FIG. 4, the shape of the intermediate heating plate 29 is almost the same as that of the movable heating plate 27. However, the intermediate heating plate 29 is provided with four sliding members 31 similar to the sliding members 25 at positions corresponding to the sliding members 25 provided on the movable plate 23. The protruding end is formed with a sliding surface 31a having a taper. FIG. 5 is an explanatory view showing the vicinity of the sliding member 31.

The intermediate heating plate 29 is provided with four step plates 32 slightly separated from the sliding member 31 in order to regulate the lowering limit of the intermediate heating plate 29. However, step board 3
No. 2 does not restrict the elevation of the intermediate heating plate 29. Intermediate hot plate 29
When the movable hot plate 27 rises together with the movable platen 23 and pushes up the intermediate hot plate 29, the movable hot plate 27 can be raised together with the movable hot plate 27.

Above the intermediate hot plate 29, a fixed hot plate 33 is arranged. The shape of the fixed hot plate 33 is the same as that of the intermediate hot plate 29. The fixed hot plate 33 has the same four members as the sliding member 25 and the sliding member 31 at positions corresponding to the sliding member 25 provided on the movable platen 23 and the sliding member 31 provided on the intermediate heating plate 29. A plurality of sliding members 35 are provided. The protruding end is formed with a tapered sliding surface 35a.

The fixed hot plate 33 is mounted on a fixed platen 37. The fixed board 37 is fixed to a fixed member 39 provided inside the end plate 11. Thereby, the relative positions of the fixed plate 37 and the fixed hot plate 33 and the inner container 3 are fixed. Although not shown, the movable hot plate 27 and the intermediate hot plate 2
A heat medium flow path is provided inside the fixed heat plate 9 and the fixed heat plate 33, and the heat medium supplied through the heat medium pipe 14a flows through the flow path to the heat medium pipe 14b. . Thereby, the movable heating plate 27, the intermediate heating plate 29, and the fixed heating plate 33 can be heated to a predetermined temperature via the heating medium.

The relative positions of the movable hot plate 27, the intermediate hot plate 29, and the fixed hot plate 33 are changed from a state in which a predetermined interval is maintained by the action of the hydraulic cylinder 17 via the ram 19 and the movable plate 23. The position can be changed to a position where 27, 29, and 33 are in contact. Therefore, each of these hot plates 27, 2
While holding and pressing the work material between 9, 33,
The workpiece can be heated and softened by heating with the heating medium.

The hydraulic cylinder 17 to the fixed board 37 constitute an internal mechanism for press working. The cylinder 13 connected to the bottom plate 9 via bolts contains an internal mechanism for the above-described press working. Also, torso 1
3, three openings 41a and 41b and large openings 43a and 43b for inserting a workpiece and taking out a product are provided.

These small openings 41 are formed on the inner wall of the body 13.
A cooling pipe 21b is provided below the cooling pipes 21a and 41b and the large openings 43a and 43b. In the cooling pipe 21b, refrigerant supplied and discharged through the refrigerant holes 22 flows through a refrigerant supply path (not shown).
Is coolable.

A shutter 45 is provided on the outer periphery of the body 13 so as to surround the body 13 in a belt shape. Shutter 45
A shutter opening / closing mechanism 47 is attached to the
When the shutter 7a moves upward, the shutter 45 closes, and when the shutter 7a moves downward, the shutter 45 opens. This shutter 45
When the shutter is closed, the contact portion between the shutter 45 and the body 13 is air-tightly joined.

A nozzle 51 is provided on the upper part of the end plate 11 connected to the upper end of the body 13 via a bolt, and communicates with the inside of the inner container 3. A valve (not shown) is attached to the nozzle 51 and can be opened and closed. Since the bottom plate 9, the body 13 and the end plate 11 are airtightly connected, when the shutter 45 and the nozzle 51 are closed,
The inner container 3 is an airtight container.

Further, four rail supports 57 are provided on the inner wall of the body 13 along the axial direction. Each of the rail supports 57 is provided with one guide rail 59 having a substantially trapezoidal transverse section and a rectangular longitudinal section. A side surface of the guide rail 59 corresponding to the oblique side of the trapezoidal cross section is a sliding surface 61 having a taper.

FIG. 5 is a partially enlarged view of a contact portion between the guide rail 59 and the sliding member 31 of the intermediate heating plate 29. (B)
FIG. 2 is a sectional view taken along line AA of FIG. The sliding surface 61 of the guide rail 59 is in close contact with the sliding surfaces 25a, 31a, 35a of the movable platen 23, the intermediate hot plate 29 and the fixed hot plate 33. At the same time, the sliding surface 61 of the guide rail 59 is
The sliding members 25 and 31 of the intermediate heating plate 29 are slidable.

Thus, the movable platen 23 and the intermediate hot plate 2
Numeral 9 can move up and down accurately along the guide rail 59. Although the fixed hot plate 33 does not move up and down, the sliding member 35 is in close contact with the guide rail 59, thereby preventing the fixed hot plate 33 from shifting in the horizontal direction.

Next, the outer container 5 will be described. FIG. 6 is a cross-sectional view in which the internal mechanism of the inner container 3 is omitted.
It is explanatory drawing of the relative positional relationship between the inner container 3 and the outer container 5. The outer container 5 is formed by the bottom plate 9, the flange portion 11a of the end plate 11, and the vacuum walls 71, 72a, 72b, 73a, 73b. Vacuum walls 71, 72a, 72b, 7
The lower ends of 3a and 73b are attached to the bottom plate 9, and the upper ends are attached to the flange 11a.

Therefore, to be precise, the outer container 5 and the inner container 3 share the bottom plate 9 and the end plate 11. Corner members 75a, 75b, 75c, and 75d that connect and reinforce the vacuum walls 71 to 73b are provided at corners where the vacuum walls 71 to 73b are connected to each other. Each vacuum wall 71-72b and corner member 75
a and 75d are airtightly connected.

The vacuum wall 73a and the vacuum wall 73b
Are connected via pillars 77 so as to be double-opened using the connection portions with the corner members 75b and 75c as rotation axes. When the vacuum wall 73a and the vacuum wall 73b are closed, the two vacuum walls 73a, 73b and the column 77 are air-tightly connected. Similarly, the corner member 75b,
75c is airtightly connected.

The vacuum wall 71 is provided with a carry-in hole 79 through which a workpiece and a product enter and exit. In addition, the loading hole 7
A vacuum shutter 83 is provided on the front of the shutter 9 and is driven to open and close by shutter opening and closing mechanisms 81a and 81b. When the vacuum shutter 83 is raised and closed, the vacuum wall 71 is closed.
, So that the carry-in hole 79 is completely covered. The vacuum shutter 83 has a window 8 made of pressure-resistant glass.
5a and 85b are provided, and when the vacuum shutter 83 is closed, the inside of the outer container 5 can be observed through the windows 85a and 85b.

A cover 87 is provided on the vacuum walls 72a and 72b.
Hand holes 89a and 89b covered by a and 87b are provided. Covers 87a and 87b are vacuum walls 72
a, 72b are hermetically attached via bolts. Hand holes 89a and 89b are for maintenance,
It is closed during normal operation.

When the vacuum walls 73a, 73b, the vacuum shutter 83, and the hand holes 89a, 89b of the outer container 5 are closed, the outer container 5 is sealed and becomes an airtight container. further,
When the shutter 45 of the inner container 3 is closed, the inner container 3 is also hermetically sealed and becomes an airtight container. Accordingly, the inner container 3 and the outer container 5 can be independent airtight containers.

The flange 11a is provided with an exhaust nozzle 91 communicating with the inside of the outer container 5. Exhaust nozzle 91
Is connected to the exhaust means 93 shown in FIG. 7 so that gas can be exhausted from the outer container 5. Further, by opening the shutter 45, the gas can be discharged from the inner container 3 together with the outer container 5.

The exhaust means 93 includes a vacuum pump 93a, a solenoid valve 93b, a pressure sensor 93c, and pipes 93d and 93e.
It is composed of One end of the pipe 93d is connected to the exhaust nozzle 9
1 and the other end is connected to a solenoid valve 93b. Further, a pressure sensor 93c is connected to the pipe 93d so that the pressure in the pipe 93d can be detected. The output of the pressure sensor 93c is transmitted to a solenoid valve 93b via a control circuit (not shown) to open and close the solenoid valve 93c. Solenoid valve 93b and vacuum pump 9
3a is connected via a conduit 93e.

For this reason, when the solenoid valve 93b is open, the exhaust nozzle 91 (outer container 5) to the vacuum pump 9
3a communicates. When the vacuum pump 93a is operated in this communication state, gas can be discharged from the outer container 5. At this time, if the shutter 45 of the inner container 3 is open, the inner container 3 and the outer container 5 are in communication with each other, so that the gas is discharged from the outer container 5 and the gas is discharged from the inner container 3 by the exhaust means 93. can do.

When the gas is discharged and the pressure of the pipe 93d (= pressure of the outer container 5) reaches a set value, the solenoid valve 93b is closed to keep the outer container 5 and the inner container 3 in a predetermined reduced pressure state. As described above, the vacuum wall 73 of the outer container 5
a, 73b, vacuum shutter 83 and handhole 89
a, 89b are closed, and the shutter 45 of the inner container 3 is further closed.
Is closed, the inner container 3 and the outer container 5 become independent airtight containers. That is, the shutter 45 is
, And also functions as communication control means for controlling disconnection of communication between the inner container 3 and the outer container 5 in accordance with opening and closing.

Therefore, it is possible to use the nozzle 51 and the exhaust nozzle 91 to set the inner container 3 and the outer container 5 to different pressure states. Next, a case where a multilayer substrate is press-formed using the above-described hot press apparatus 1 will be described.

The material to be processed is a multilayer substrate material in which a plurality of base materials impregnated with a melamine resin are laminated as a prepreg for bonding. First, the vacuum shutter 83 and the shutter 45 are opened, a workpiece is inserted through the carry-in hole 79 and the large opening 43a, and is placed on the movable hot plate 27 and the intermediate hot plate 29. Thereafter, the vacuum shutter 83 is closed to seal the outer container 5. The vacuum walls 73a and 73b and the hand holes 89a and 89b of the outer container 5 are closed in advance. Further, the nozzle 51 is also closed.

Subsequently, the electromagnetic valve 93b of the exhaust means 93 is opened, and the vacuum pump 93a is operated. Since the shutter 45 is open, the inner container 3 and the outer container 5 are in communication. Therefore, the outer container 5 is
And the gas is also discharged from the inner container 3.

When the degree of vacuum of the outer container 5 reaches about 25 Torr, the solenoid valve 93b is closed. In conjunction with closing the solenoid valve 93b, the operation of the vacuum pump 93a is also stopped. In this embodiment, the operation of the solenoid valve 93b is performed by the pressure sensor 93b.
Although it is automatically performed by the output of c, the valve may be manually closed by visually recognizing the pressure gauge.

Thereafter, the ram 19 is raised by supplying and discharging hydraulic oil to and from the hydraulic cylinder 17. With the rise of the ram 19, the movable platen 23, the movable hot plate 27 and the intermediate hot plate 29 rise. Since the movable platen 23 and the intermediate heating plate 29 are raised by sliding the sliding members 25 and 31 on the sliding surface 61 of the guide rail 59, the raising is accurately performed along the guide rail 59.

As the movable platen 23, the movable hot plate 27 and the intermediate hot plate 29 rise, the workpiece placed on the intermediate hot plate 29 comes into contact with the fixed hot plate 33. Further, the ram 19 is slightly raised, and the ram 19 is stopped when the contact pressure between each of the hot plates 27, 29, 33 and the workpiece sandwiched therebetween becomes about 1 kg / cm ² . The hydraulic cylinder 17 is adjusted to maintain the contact pressure.

After stopping the ram 19, the heat medium pipe 14
The heating medium is supplied to the movable heating plate 27, the intermediate heating plate 29, and the fixed heating plate 33 to heat each of the heating plates 27, 29, and 33 via a. The workpiece sandwiched between the heated hot plates 27, 29, 33 is heated by the heat transfer from the hot plates 27, 29, 33 and softened.

At this time, since the surrounding area is decompressed, the volatile components contained in the workpiece evaporate out of the workpiece in response to the heating and softening. This prevents the occurrence of voids in the hot pressed product. In this embodiment, steam is used as the heat medium, but hot oil or the like may be used. Further, a configuration may be adopted in which heating is performed by a sheath heater or the like without using a heat medium fluid.

Simultaneously with the start of heating of the workpiece, the shutter opening / closing mechanism 47 is operated to raise the shutter 45, and the inner container 3 is sealed. Thereby, the inner container 3 and the outer container 5 become independent sealed containers while being kept in a vacuum. Subsequently, the supply and discharge of hydraulic oil to and from the hydraulic cylinder 17 are operated to maintain the contact pressure between each of the hot plates 27, 29, and 33 and the workpiece at about 25 kg / cm ² .

The state where the softened workpiece is being pressed is as follows:
Hold for about 60 minutes. This holding time is obtained by an experiment in advance before the press molding of the multilayer substrate. Since the inner container 3 and the outer container 5 have a double structure, the two containers are connected to each other to reduce the pressure in common, then the shutter 45 is closed to cut off the communication, and the inner container 3 and the outer container 5 are connected to each other. Hot pressing can be performed while a vacuum region is formed therebetween.

Each hot plate 27, 2 at the time of hot pressing
The heat from the tubes 9 and 33 reaches the inner container 3 by radiation, convection and conduction, but the convection from the inner container 3 to the outer container 5 because a vacuum region is formed between the inner container 3 and the outer container 5. , Heat transfer by conduction is prevented. As a result, the temperature rise of the outer container 5 is extremely small as compared with the inner container 3.

Therefore, the heat radiation from the hot plates 27, 29, 33 is blocked by the inner container 3, and the amount of heat radiated through the outer shell of the hot press device 1 is reduced, so that the thermal efficiency of the hot press device 1 is reduced. Is prevented. After the elapse of the above-mentioned holding time of about 60 minutes, the temperature of the hot plate is lowered to a temperature below the temperature at which the work material solidifies, and waiting for curing. Since this temperature varies depending on the composition of the prepreg of the workpiece, it is determined in advance by experiments and the like. Through this curing time,
The contact pressure between the workpiece and each of the hot plates 27, 29, 33 is maintained at about 25 kg / cm ² .

After the work material is hardened, the hydraulic cylinder 17
To lower the ram 19. As the ram 19 is lowered, the movable platen 23, the movable hot plate 27 and the intermediate hot plate 29 are lowered. However, since the lower limit of the intermediate heating plate 29 is regulated by the step plate 32, the intermediate heating plate 29 stops at a predetermined position and does not descend below it.

When the movable platen 23 reaches the predetermined lowest point, the hydraulic cylinder 17 is operated to stop the ram 19. The distance between the movable hot plate 27, the intermediate hot plate 29, and the fixed hot plate 33 is the initial distance, and a hardened workpiece is placed on the movable hot plate 27 and the intermediate hot plate 29.

The hot press 1 is cooled down to the product take-out temperature while the workpiece is placed on both the hot plates 27 and 29. After that, the shutter 45 and the vacuum shutter 83 are opened, and the sealing of the inner container 3 and the outer container 5 is released, and the processed material as a product is taken out.

The periphery of the hydraulic cylinder 17 and the body 1
Refrigerant is supplied to the cooling pipes 21a and 21b disposed on the inner wall of the third through a refrigerant hole 22 and a refrigerant supply path (not shown). Thus, the hydraulic cylinder 17 and the shutter 4
The vicinity of the contact portion with the cooling member 5 is cooled to prevent heating.

In this embodiment, for the sake of simplicity, the intermediate hot plate is
Although described as a sheet, usually, a plurality of intermediate heating plates are provided. When the number of intermediate hot plates is increased, the number of workpieces processed in one press operation can be increased. Further, if the outer shell of the hot press device such as the outer wall of the outer container and the end plate is coated with a heat insulating material, the effect of preventing heat radiation is further improved, and the lowering of the thermal efficiency is further prevented.

Although the present invention has been described with reference to the embodiments, the present invention is not limited to the above-described embodiments, and various improvements can be freely made without departing from the gist of the present invention.

[0058]

As described in detail above, according to the hot press apparatus of the present invention, since the inner container and the outer container have a double structure, the two containers are connected to each other and the pressure is reduced in common. By disconnecting the communication, hot pressing can be performed while a vacuum region is formed between the inner container and the outer container.

The heat from each hot plate at the time of hot pressing reaches the inner container by radiation, convection, and conduction. However, since a vacuum region is formed between the inner container and the outer container, the heat flows from the inner container to the outer container. Convection and heat transfer by conduction are prevented. As a result, the temperature rise of the outer container is extremely small as compared with the inner container.

Therefore, heat radiation from the hot plate is blocked by the inner container, and the amount of heat radiated through the outer shell of the hot press device is reduced, so that a decrease in the thermal efficiency of the hot press device is prevented.

[Brief description of the drawings]

FIG. 1 is a front partial cross-sectional view of a hot press apparatus according to an embodiment.

FIG. 2 is a side sectional view of the hot press apparatus of the embodiment.

FIG. 3 is an explanatory diagram of a relative position between a guide rail of the hot press device of the embodiment and a sliding member of the movable plate.

FIG. 4 is an explanatory view of a relative position between a guide rail and a sliding member of an intermediate heating plate of the hot press device of the embodiment.

FIG. 5 is an explanatory diagram of a contact portion between a guide rail of the hot press apparatus of the embodiment and a sliding member of the intermediate heating plate.

FIG. 6 is a cross-sectional view of the hot press apparatus of the embodiment, in which an internal mechanism of the inner container is omitted, and is an explanatory diagram of a relative positional relationship between the inner container and the outer container.

FIG. 7 is a block diagram of an exhaust unit of the hot press device according to the embodiment.

[Explanation of symbols]

1 ... Hot press device, 3 ... Inner container, 5 ...
・ Outer container, 7 ・ ・ ・ Base, 9 ・ ・ ・ Bottom plate, 11 ・ ・ ・
End plate, 11a ... Flange part, 13 ... Body, 17.
..Hydraulic cylinder, 19 ... ram, 23 ... movable plate, 27 ... movable hot plate, 29 ... intermediate hot plate, 33 ...
..Fixed hot plates, 37 fixed boards, 39 fixed members, 45 shutters, 57 rail supports,
59 ... guide rail, 71, 72a, 72b, 73
b: vacuum wall, 83: vacuum shutter, 91:
Exhaust nozzle, 93 ... Exhaust means.

Continuation of the front page (51) Int.Cl. ⁶ identification symbol FI H05K 3/46 H05K 3/46 Y // B29K 105: 06 (58) Investigated field (Int.Cl. ⁶ , DB name) B29C 43/18 -43/20 B29C 43/32-43/42 B29C 43/52-43/58 B30B 7 / 02,15 / 34 H05K 3/46

Claims (1)

(57) [Claims] A fixed plate, a fixed hot plate mounted on the fixed plate, a movable plate reciprocally movable to be pressed against or separated from the fixed plate, and driven by a hydraulic cylinder; A movable hot plate mounted on the movable plate and an intermediate hot plate disposed between the fixed and movable hot plates and reciprocating according to the reciprocating motion of the movable plate are housed in a hermetically sealed and decompressible container, In a hot press apparatus capable of hot press-forming the workpiece inserted between the hot plates, the container has a side surface having an opening through which the workpiece can be loaded and unloaded, and the movable platen is provided on the fixed platen. A cylindrical body that maintains a tensile strength against a mold clamping force when pressed against the cylinder body; and a cylindrical shutter that is mounted on the outer periphery of the body and closes and opens the opening according to vertical movement. A semi-ellipsoidal end plate connected to the upper end of the torso An inner container having a substantially cylindrical shape, wherein the fixed plate is fixed to the end plate, and a plurality of guide rails are provided around the movable plate along a reciprocating direction of the movable plate. By providing a sliding portion that slides closely with the guide rail, the movable platen and the intermediate heating plate can reciprocate along the guide rail. Further, the pressure vessel is stored and opened, closed, and depressurized. A hot press device comprising a possible outer container.