JP3847633B2 - Press apparatus and press method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a press apparatus and a press method for forming a workpiece by hot pressing.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a press apparatus for molding a plastic workpiece has been used to manufacture, for example, a plastic IC card (integrated circuit card), a printed wiring board (PWB), and the like. Such a press apparatus inserts a workpiece mainly made of resin between two heating plates, and presses the workpiece while heating the workpiece (hot pressing process). The object is molded.
[0003]
For example, when forming a printed wiring board with a thickness of 100 μm or less using such a pressing device, the pressing pressure applied to the product differs depending on the position of the hot plate unless the flatness accuracy of the hot plate is kept within 10 μm. In some cases, the accuracy in the thickness direction of the printed wiring board decreases, and depending on the position to be pressed, there is a possibility that the press pressure is insufficient and the copper foil and the prepreg cannot be bonded properly.
[0004]
[Problems to be solved by the invention]
In recent years, in order to be able to produce a large number of molded products with a single press, a press device having a large hot platen has been used. The larger the hot platen area, the more difficult it is to ensure the flatness accuracy of the hot platen. Therefore, problems such as reduced accuracy in the thickness direction of the printed wiring board and poor adhesion between the copper foil and the prepreg were likely to occur. .
[0005]
In order to avoid such a phenomenon, conventionally, a material such as kraft paper that has a small surface roughness and has a small deformation on one surface and hardly affects the surface accuracy of the other surface is used as a workpiece as a cushioning material. It was sandwiched between hot plates. However, the material suitable for such a cushioning material has a problem that the heat of the hot platen is not easily transmitted to the prepreg as a work piece because the heat conductivity is extremely low as compared with the hot platen, and the molding time is extended. .
[0006]
OBJECT OF THE INVENTION
In view of the above problems, the present invention is less likely to cause problems such as a decrease in accuracy in the thickness direction of a printed wiring board and poor adhesion between a copper foil and a prepreg even when a large heating plate is used, and molding time. An object of the present invention is to provide a press device in which the length does not extend.
[0007]
[Means for Solving the Problems]
In order to solve the above problem, the press device of the present invention covers at least a pair of hot plates that are hot-pressed with a workpiece interposed therebetween, and at least one workpiece-side surface of the pair of hot plates, A metal plate fixed to the at least one hot platen and a gap between the at least one hot platen and the metal plate are filled so as to be spaced apart from the workpiece side surface of the at least one hot platen by a predetermined distance. And a heat medium pressure adjusting means for adjusting the pressure of the heat medium.
[0008]
By adjusting the pressure of the heat medium by the heat medium pressure adjusting means, the metal plate attached to one of the heat plates is pressed in accordance with the other heat plate while maintaining the planar shape. As a result, the flatness accuracy of the metal plate depends only on the surface roughness, so the metal plate when the workpiece is hot-clamped by keeping the surface roughness of the metal plate low by mirror finish etc. High flatness accuracy of the plate can be maintained. Therefore, when pressing a printed wiring board with such a press apparatus, problems such as a decrease in accuracy in the thickness direction of the printed wiring board and poor adhesion between the copper foil and the prepreg do not occur. Furthermore, since the metal plate is rapidly heated by the heat medium, the molding time does not increase unlike the case of molding using the cushion material.
[0009]
Further, the heating medium pressure adjusting means is configured to set the pressure of the heating medium to a pressure substantially equal to the molding pressure of the workpiece when the press device heat-presses the workpiece. Is preferred.
[0010]
The press device is formed in at least one hot platen, one of the inlets and outlets is formed on the surface of the at least one hot platen on the workpiece side, and the other of the inlets and outlets is connected to the heat medium pressure adjusting means. Heat medium pressure adjusting means, and the heat medium pressure adjusting means is heat fed from the heat medium pressure adjusting means to the gap between at least one hot platen and the metal plate through the heat medium pressure adjusting heat medium path. It is preferable that the pressure of the medium be adjusted.
[0011]
Further, at least one of the heating plates is configured as a heat generating portion, one surface of which is in contact with the heat generating portion, and the other surface is a surface on the workpiece side of at least one of the heating plates, and conducts heat from the heat generating portion to the heating medium. A plate-like jacket jig, and a heat medium pressurizing heat medium passage is formed in the jacket jig.
[0012]
By adopting such a configuration, the heat generating portion that is the heating medium heating portion of the hot platen and the jacket jig that is the heating medium pressurizing portion can be separated, so that the metal plate can be easily replaced.
[0013]
Further, a groove is formed in a mesh shape on the surface of at least one hot platen on the workpiece side, and a part of the groove is connected to the entrance / exit of the heating medium passage for heating medium pressurization, and the heating medium is not pressurized. In some cases, the metal plate may be in contact with the surface of the at least one hot platen on the workpiece side.
[0014]
With such a configuration, when the heating medium is pressurized, the heating medium preferentially passes through the groove and spreads quickly over the entire surface of the work plate, so the heating medium uniformly pressurizes the metal plate. be able to.
[0015]
The heating medium pressure adjusting means is configured to set the pressure of the heating medium to a pressure substantially equal to the molding pressure of the workpiece after the press device pressurizes the workpiece to a molding pressure. The heating medium pressure adjusting means may be configured to reduce the pressure of the heating medium after the molding of the workpiece is completed and before the press device reduces the pressure on the workpiece. By setting it as such a structure, the failure | damage of the said metal plate by the pressure of the said heat medium can be prevented.
[0016]
Preferably, the heat medium is an incompressible heat medium. The heat medium is preferably heat medium oil. Such heat transfer oil keeps the liquid state even when heated to the molding temperature of the workpiece, so that the heat transfer medium vaporizes and is compressible, preventing problems such as bending of the metal plate. can do.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a basic configuration of a press unit 1 of a press apparatus according to a first embodiment of the present invention. In the following description, “upper” and “lower” are defined as shown in FIG. 1, but the configuration of the press unit 1 may be upside down.
[0018]
The press unit 1 includes a press frame 3, an upper heating platen unit 100, a lower heating platen unit 200, and a cylinder unit 300. The press frame 3 is rigidly supported on the base of the press device installation portion. The fixed platen 210 of the lower heating platen 200 is fixed on the base portion 3 b of the press frame 3. Further, the cylinder part 300 is fixed to the lower surface of the ceiling part 3 a of the press frame 3.
[0019]
The cylinder unit 300 includes a cylinder 310, a piston 320 that can move up and down while sliding on the inner wall of the cylinder 310, and a shaft 330 that extends vertically downward from the center of the lower surface of the piston 320. A through hole 311 is perforated at the center of the lower surface of the cylinder 310, and the shaft 330 moves up and down while sliding with the through hole 311 according to the vertical movement of the piston 320. The movable platen 110 of the upper heating platen 100 is fixed to the lower end of the shaft 330.
[0020]
The cavity 340 of the cylinder 310 is divided into a cavity (upper) 341 and a cavity (lower) 342 by the piston 320. The cavity (upper) 341 and the cavity (lower) 342 are each filled with hydraulic oil. The cavity (upper) 341 and the cavity (lower) 342 are connected to the hydraulic pump 4. The hydraulic pump 4 is connected to the controller 8, and the controller 8 drives the hydraulic pump to pressurize one of the hydraulic oils injected into each of the cavity (upper) 341 and the cavity (lower) 342 and press the other. By reducing the pressure, the piston 320 can be freely moved up and down. Therefore, the controller 8 can control the hydraulic pump 4 to move the upper heating platen 100 up and down.
[0021]
The upper heating platen 130 of the upper heating platen unit 100 is suspended and fixed from the lower surface of the movable platen 110 via a heat insulating material 120. Similarly, the lower heat platen 230 of the lower heat platen unit 200 is fixed to the upper surface of the fixed platen 210 via the heat insulating material 220. Further, the lower surface of the upper heating plate 130 of the upper heating plate portion 100 and the upper surface of the lower heating plate 230 of the lower heating plate portion 200 are covered with heating plate covers 140 and 240, respectively.
[0022]
By driving the hydraulic pump to drive the upper heating platen part 100 downward, the printed wiring board 2 placed on the heating platen cover 240 of the lower heating platen part 200 is moved to the heating platen cover 240 of the heating board part 200. And a hot platen cover 140 of the upper hot platen unit 100 and can be pressed. While the printed wiring board 2 is being pressed, the upper heating plate 130 of the upper heating platen unit 100 and the lower heating platen 230 of the lower heating platen unit 200 are respectively heated to the molding temperature of the prepreg of the printed wiring board 2 by the heater 5. Has been. A method for heating the hot platen by the heater 5 will be described later. Thus, the copper foil of the printed wiring board 2 is bonded to the prepreg by a so-called hot-pressing process in which the printed wiring board 2 is pressed while being heated. In the embodiment of the present invention, the printed wiring board 2 having a thickness of 86 μm, in which both surfaces of a prepreg having a thickness of 50 μm are respectively covered with a copper foil of 18 μm, is pressed.
[0023]
FIG. 2 is a cross-sectional view of the upper heating platen 130 of the upper heating platen unit 100 cut in the horizontal direction. The lower heat plate 230 of the lower heat plate portion 200 and the upper heat plate 130 of the upper heat plate portion 100 are members having the same shape.
[0024]
The upper heating platen 130 is a substantially square steel plate. The upper heating plate 130 includes first holes 131a to 131h (131a, 131b, 131c, 131d, in order from the left side in FIG. 2), which are eight parallel through holes drilled in the vertical direction in FIG. 131e, 131f, 131g, 131h) and a second hole 132 drilled in the left-right direction in FIG. 2 so as to be orthogonal to all of the first holes 131a-h at the lower end of the upper heating plate 130 in FIG. 2, a third hole 133 drilled in the left-right direction in FIG. 2 so as to be orthogonal to the first holes 131a to 131f from the left side of the upper end part in FIG. 2, and the upper end in FIG. A fourth hole 134 is formed in the right and left direction in FIG. 2 so as to be orthogonal to the first holes 131g and 131h from the right side of the part. Blind caps 136 are fitted into both ends of the first holes 131b to 131g, respectively. A blind cap 136 is fitted into the first holes 131a and 131h only at the upper end in FIG. Further, both ends of the second hole 132, a portion between the first holes 131a and 131b, a portion between the first holes 131c and 131d, a portion between the first holes 131e and 131f, and the first A blind cap 136 is fitted into each of the portions between the first holes 131g and 131h. Further, a blind cap 136 is fitted into each of the left end, the portion between the first holes 131b and 131c, and the portion between the first holes 131d and 131e in the third hole 133. A blind cap 136 is fitted into the right end of the fourth hole 134. By inserting the blind cap 136 into each of the first hole 131a to h, the second hole 132, the third hole 133, and the fourth hole 134, the first hole 131a to h, The second hole 132, the third hole 133, and the fourth hole 134 have one end at the lower end 138 of the first hole 131a and the lower end 139 of the first hole 131h, and meander through the upper heating plate 130. It functions as a heating medium conduit for heating.
[0025]
Heat medium oil heated by the heater 5 (FIG. 1) is circulated by the pump 6 (FIG. 1) in the heating medium pipe for heating, and the upper heat platen 130 is heated by the heat medium oil. In addition, a temperature sensor (not shown) is attached to the upper heating platen 130. This temperature sensor is connected to the controller 8 (FIG. 1) of the press device. When the press device presses the printed wiring board 2, the controller 8 determines that the temperature of the upper heating platen 130 measured by this temperature sensor is the printed wiring. The heater 5 is controlled so as to adjust the temperature of the heat transfer oil flowing in the pipe line so that the molding temperature of the prepreg of the substrate 2 is around 200 degrees.
[0026]
Further, a through hole 137 is drilled in the peripheral direction of the upper heating plate 130 in the vertical direction. Bolts 180 (not shown) are attached to the through holes 137 and fastened to the hot platen cover 140, whereby the hot platen cover 140 is fixed to the upper hot platen 130.
[0027]
A fifth hole 160a is drilled between the first hole 131f and the first hole 131g in parallel with the first hole 131f from the upper end of the upper heating plate 130 in FIG. The fifth hole 160a intersects with a sixth hole 160b that is drilled vertically upward from the lower surface of the upper heating platen 130. The fifth hole 160a and the sixth hole 160b form a heating medium passage 160 for pressurizing from the side surface (upper end in FIG. 2) of the upper heating plate 130 to the lower surface of the upper heating plate 130.
[0028]
FIG. 3 is a cross-sectional view taken along the line AA of FIG. As shown in FIG. 3, the upper heating platen 130 is a thick plate-shaped member with the lower surface peripheral edge cut off, and the lower surface thereof is covered with the heating platen cover 140. The hot platen cover 140 includes a rectangular annular frame portion 141 that covers the cutout portion of the upper hot platen 130 and a metal plate 142 made of stainless steel. The lower end of the frame portion 141 is formed as a flange portion 141a protruding outward, and the flange portion 141a and the end portion of the metal plate 142 are welded all around without any gap, so that the frame portion 141 and the metal plate 142 are integrated. To form a bowl-shaped hot platen cover 140.
[0029]
The frame portion 141 has a plurality of screw holes 141c drilled vertically from the upper surface thereof. Each of the screw holes 141c is internally threaded, and the upper heating plate 130 is fastened to the heating platen cover 140 by screwing the bolt 180 inserted into the through hole 137 of the upper heating plate 130 into the female screw. Is done.
[0030]
A gap 170 is formed between the lower surface of the upper heating plate 130 and the metal plate 142. The gap 170 and the pressurizing heat medium passage 160 are filled with heat medium oil. The heat transfer oil filled in the gap 170 and the pressurizing heat transfer passage 160 once absorbs the heat of the upper heating plate 130 and releases the heat to the metal plate 142. Since the heat transfer oil having fluidity is interposed between the metal plate 142 and the upper heating platen 130, the metal plate 142 is quickly heated. The opening 160c of the pressurizing heat medium passage 160 is connected to the pressure generator 7 (FIG. 1). The pressure generator 7 is connected to a controller 8 of the press device, and the controller 8 controls the pressure generator 7 to vary the pressure of the heat medium oil filled in the gap 170 and the heat medium passage 160 for pressurization. Can do. A packing 150 is inserted between the upper surface of the frame portion 141 and the cutout portion of the upper heating platen 130 to prevent the heat transfer oil from flowing out from the gap between the frame portion 141 and the upper heating platen 130. .
[0031]
The lower surface of the metal plate 142 is mirror-finished, and the surface roughness is within several μm. Therefore, if the balance between the press pressure and the pressure of the heat transfer medium oil filled in the gap 170 and the pressurizing heat transfer medium passage 160 is maintained and the metal plate 142 maintains a flat state, the plane of the lower surface of the metal plate 142 is maintained. The degree accuracy is kept within 10μm.
[0032]
The structure of the lower heating plate 230 of the lower heating plate 200 and the structure of the heating plate cover 240 attached to the lower heating plate 230 are the same as the upper heating plate 130 of the upper heating plate 100 and the upper heating plate 130. The structure is the same as that of the attached hot platen cover 140. That is, the lower heating platen 230 of the lower heating platen unit 200 is heated to the molding temperature of the prepreg of the printed wiring board 2 by the heat transfer oil circulating in the heating heat transfer medium pipe formed therein. Further, while the press device is pressing the printed circuit board 2, the heating medium passage for pressurization formed in the lower heating plate 230 is filled with the heat medium oil filled between the lower heating plate 230 and the heating plate cover 240. The pressure of the heat medium oil that can be pressurized via the pressure is maintained in balance with the pressure of the heat medium oil filled in the gap 170 of the upper heat platen 100 and the heat medium passage 160 for pressurization. Pressurized. Since the pressure of the heat transfer oil filled in the gap between the upper heating platen 100 and the lower heating platen 200 is balanced, the metal plates of the upper heating platen 100 and the lower heating platen 200 are flat with high accuracy. Learn from each other while maintaining state. Further, the heat of the lower heating plate 230 is quickly transferred by the heating medium filled between the lower heating plate 230 and the heating plate cover 240, and the heating plate cover 240 is heated.
[0033]
In the press device according to the embodiment of the present invention, the hot platen cover is attached to each of the upper hot platen 130 and the lower hot platen 230, but the present invention is not limited to the above-described configuration, Only one of the hot platen 130 and the lower hot platen 230 may be covered with the hot platen cover. In that case, the metal plate of the hot platen cover is pressed against the hot platen not covered by the hot platen cover, and the metal plate is kept flat with high accuracy.
[0034]
A procedure for press-molding the printed wiring board 2 by the press apparatus configured as described above will be described below. Before the press is started, the printed wiring board is not placed on the heating platen cover 240 of the lower heating platen part 200, and the temperatures of the upper heating platen 130 and the lower heating platen 230 It does not reach 200 ° C., which is the molding temperature of the prepreg of the substrate 2. Further, the hot platen cover 140 of the upper hot platen unit 100 is separated from the hot platen cover 240 of the lower hot platen unit 200.
[0035]
First, the heat medium oil circulating inside the heating medium conduit for heating formed inside the upper heating plate 130 and the lower heating plate 230 is heated by the heater 5 to print the temperature of the upper heating plate 130 and the lower heating plate 230. Heating is performed up to 200 degrees which is the molding temperature of the prepreg of the wiring board 2. The heat of the upper heating plate 130 and the lower heating plate 230 is heated by the heat medium oil filled between the upper heating plate 130 and the heating plate cover 140 and between the lower heating plate 230 and the heating plate cover 240. The heat is transmitted to the cover 140 and the heat plate cover 240 of the lower heat plate 230, and the heat plate cover 140 of the upper heat plate 130 and the heat plate cover 240 of the lower heat plate 230 are quickly heated.
[0036]
The temperatures of the upper heat plate 130 and the lower heat plate 230 are measured by temperature sensors attached in the upper heat plate 130 and the lower heat plate 230. After confirming that the measured value of the temperature sensor exceeds 200 ° C., the printed wiring board 2 is placed on the hot platen cover 240 of the lower hot platen unit 200.
[0037]
Next, the hydraulic pump 4 is driven to lower the movable platen 110 of the upper heating platen 100 and bring the heating platen cover 140 of the upper heating platen 100 into contact with the printed wiring board 2. Further, the hydraulic pump 4 is driven to pressurize the printed wiring board 2 with a predetermined press pressure. At the same time, the pressure generator 7 is driven so that the heat medium oil filled between the upper heat plate 130 and the heat plate cover 140 and the heat medium oil filled between the lower heat plate 230 and the heat plate cover 240 have a predetermined pressure. Pressurize with. It should be noted that the upper heat plate is prevented from being opened by the pressure of the heat medium oil filled between the upper heat plate 130 and the heat plate cover 140 and the heat medium oil filled between the lower heat plate 230 and the heat plate cover 240. The sum of the pressures of the heat medium oil filled between the panel 130 and the heat disk cover 140 and the heat medium oil filled between the lower heat disk 230 and the heat disk cover 240 is suppressed to be lower than the predetermined press pressure.
[0038]
In this state, the printed circuit board is continuously pressed for a predetermined time, and after a sufficient time has passed for the prepreg of the printed circuit board 2 and the copper foil to adhere, the controller 8 controls the pressure generator 7 to control the upper heating plate 130. The oil pressure of the heat medium oil filled between the heat platen cover 140 and the heat medium oil filled between the lower heat platen 230 and the heat platen cover 240 is reduced. Next, the controller 8 controls the hydraulic pump 4 to reduce the pressure applied to the printed circuit board 2, and further raises the movable platen 110 of the upper heating platen 100 to move the heating platen cover 140 of the upper heating platen 100 to the lower heating platen. The unit 200 is separated from the hot platen cover 240 of the unit 200. Next, the printed wiring board 2 that has been molded is taken out.
[0039]
As described above, the heat medium oil filled between the upper hot platen 130 and the hot platen cover 140 and the lower hot platen 230 and the hot platen cover before the pressure applied to the printed wiring board 2 is reduced after the completion of the hot pressing. By reducing the hydraulic pressure of the heat transfer oil filled between 240, the metal plate of each hot platen cover can be prevented from being damaged. If the pressure applied to the printed wiring board 2 is reduced first, the balance of forces applied to both surfaces of the metal plate may be lost, and the metal plate may be damaged. On the other hand, when the oil pressure of the heat medium oil filled between the upper heat plate 130 and the heat plate cover 140 and the oil pressure of the heat medium oil filled between the lower heat plate 230 and the heat plate cover 240 are first reduced, Since the plate is supported by the upper heating platen 130 or the lower heating platen 230, the balance of forces applied to both surfaces of the metal plate is maintained.
[0040]
In the first embodiment of the present invention, as shown in FIG. 3, a heating heat medium pipe line and a pressurizing heat medium path 160 are formed in an integrated heat plate formed therein, and the heat plate has a bowl shape. However, the present invention is not limited to the above-described configuration, and various modifications are possible. The following second embodiment of the present invention is an example of such a modification.
[0041]
FIG. 4 shows the basic configuration of the press unit of the press device of this embodiment. In the press device of this embodiment, the upper heating platen 130 has a structure that can be separated into a heat generating plate 1301 and a jacket jig 1302. Similarly, the lower heating plate 230 has a structure that can be separated into a heating plate 2301 and a jacket jig 2302. The heat generating plates 1301 and 2301 are plate-like members in which a heating medium pipe for heating similar to that of the first embodiment is formed. Further, one surface of the jacket jig 1302 (2302) is in contact with the surface of the heat generating plate 1301 (2301) on the printed wiring board 2 side, and the other surface is opposed to the heat platen cover 140 (240). It is the plate-shaped member fixed to. A heating medium passage for pressurization is formed inside the jacket jigs 1302 and 2302. In the present embodiment, the hot platen cover 140 is constituted only by the metal plate 142, and the frame portion 141 (see FIG. 3) is not used. The other points are the same as those of the first embodiment of the present invention, and thus the description thereof is omitted.
[0042]
FIG. 5 shows a horizontal sectional view of the heat generating plate 1301. The structure of the heat generating plate 2301 on the lower heating plate 230 side is the same. The heating plate 1301 of this embodiment is different from the upper heating plate 130 of the first embodiment of the present invention shown in FIG. 2 only in that the pressurizing heat medium path is not formed.
[0043]
FIG. 6 shows the lower surface of the jacket jig 1302. The structure of the jacket jig 2302 on the lower heating plate 230 side is the same.
[0044]
A lattice-like groove 1302 a is formed on the entire other surface of the lower surface of the jacket jig 1302. Further, vertical holes 1611 are drilled in the vertical direction from the four corners of the lower surface of the jacket jig 1302. The upper end of the vertical hole 1611 reaches the middle of the jacket jig 1302. Further, the bottom surface of the jacket jig 1302 of the vertical hole 1611 is connected to the groove 1302a of the flange outlet 1611a. In addition, first horizontal holes 1612 are drilled in the horizontal direction so as to connect the upper ends of the four vertical holes 1611. Further, a second lateral hole 1613 that is branched in the horizontal direction from one half of the first lateral hole 1612 toward the side surface of the jacket jig 1302 is drilled. The vertical hole 1611, the first horizontal hole 1612, and the second horizontal hole 1613 form a pressurizing heat medium passage 1610 that passes from the side surface of the jacket jig 1302 to the lower surface of the jacket jig 1302.
[0045]
The side outlet 1613a of the jacket jig 1302 of the second horizontal hole 1613 is connected to the pressure generator 7 (see FIG. 4), and the controller 8 controls the pressure generator 7 to fill the heating medium passage 1610 for pressurization. The pressure of the heated heat transfer oil can be varied. Note that the peripheral edge C of the lower surface of the jacket jig 1302 is welded to the metal plate 142 all around, thereby preventing the heat transfer oil from flowing out from the joint between the jacket jig 1302 and the metal plate 142. As described above, in this embodiment, the pressurizing heat medium passage 1610 is formed in the jacket jig 1302, and packing is provided between the hot platen and the hot platen cover as in the configuration of the first embodiment. There is no need to provide oil sealing. Therefore, the place where the oil sealing is performed is limited to the side of the jacket jig 1302 of the second lateral hole 1613 only at the outlet 1613a. Therefore, according to the individuality of this embodiment, the risk of oil leakage can be suppressed.
[0046]
FIG. 7 is a sectional view taken along line BB in FIG. The structure of the jacket jig 2302 on the lower heating plate 230 side is the same.
[0047]
A through-hole (not shown) is formed in the peripheral portion of the heat generating plate 1301 in the vertical direction. The jacket jig 1302 is fixed to the heat generating plate 1301 by attaching a bolt (not shown) to the through hole and fastening it to a screw hole (not shown) drilled in the jacket jig 1302 from above. Therefore, according to the present embodiment, the heat generating plate 1301 and the jacket jig 1302 can be easily separated by removing the bolts. In addition, since a pipe line is not formed between the heat generating plate 1301 and the jacket jig 1302, it is not necessary to perform oil sealing between the heat generating plate 1301 and the jacket jig 1302. Therefore, even if the metal plate 142 is damaged, it is only necessary to replace the jacket jig 1302 that is screwed, and oil sealing is considered between the heat generating plate 1301 and the jacket jig 1302 in the replacement. There is no need.
[0048]
Further, as shown in FIG. 7, the surface 1302 b other than the groove on the lower surface of the jacket jig 1302 is in contact with the upper surface of the metal plate 142. Accordingly, when the pressure generator 7 is controlled from this state to pressurize the heat transfer fluid, the lower surface of the jacket jig 1302 of the vertical hole 1611 passes through the groove 1302a preferentially through the groove outlet 1611a and the jacket treatment is quickly performed. Spreads across the entire lower surface of the tool 1302. When the heat medium oil is further pressurized from this state, the heat medium oil is filled between the surface 1302b other than the groove on the lower surface of the jacket jig 1302 and the metal plate 142, and the metal plate 142 is pressed downward. . As described above, since the heat transfer oil spreads over the entire lower surface of the jacket jig 1302 through the groove 1302a, the metal plate 142 is pressed downward, so that the horizontal direction on the metal plate 142 is increased. The pressure distribution is kept substantially constant.
[0049]
【The invention's effect】
As described above, according to the pressing apparatus and the pressing method of the present invention, problems such as a decrease in accuracy in the thickness direction of the workpiece are unlikely to occur, and the molding time does not increase.
[Brief description of the drawings]
FIG. 1 is a side view showing a basic configuration of a press unit of a press device according to a first embodiment of the present invention.
FIG. 2 is a horizontal sectional view of a hot platen of the press device according to the first embodiment of the present invention.
3 is a cross-sectional view taken along the line AA of the hot platen shown in FIG. 2;
FIG. 4 is a side view showing a basic configuration of a press section of a press device according to a second embodiment of the present invention.
FIG. 5 is a horizontal sectional view of a heat generating plate of a hot platen of a press device according to a second embodiment of the present invention.
FIG. 6 shows a lower surface of a jacket jig 1302 according to a second embodiment of the present invention.
7 is a cross-sectional view taken along the line BB in FIG.
[Explanation of symbols]
1 Press department
2 Printed circuit board
7 Pressure generator
8 Controller
130 Hot plate
140 Hot plate cover
142 metal plates
150 packing
160 Heating medium passage for pressurization
170 Gap
1301 Heat generation plate
1302 Jacket jig
1302a Groove
1610 Heating medium passage for pressurization

Claims (13)

At least a pair of heating plates;
A hot platen drive mechanism for causing a workpiece to be hot pressed between the hot plates by driving at least one of the pair of hot plates;
A metal plate fixed to the at least one heating plate so as to cover at least one workpiece side surface of the pair of heating plates and to be separated from the workpiece side surface of the at least one heating plate by a predetermined distance. When,
A heating medium filled in a gap between the at least one heating plate and the metal plate;
A heating medium pressure adjusting means for adjusting the pressure of the heating medium,
When the press device heat-presses the workpiece, after driving at least one of the pair of hot plates by the hot plate driving mechanism so that the workpiece is pressurized to a molding pressure, Pressurizing and holding the pressure of the heating medium at a predetermined pressure substantially equal to the molding pressure of the workpiece by a heating medium pressure adjusting means;
A press device.   The heating medium pressure adjusting means reduces the pressure of the heating medium after the molding of the workpiece is completed and before the press device reduces the pressure on the workpiece. The press apparatus according to 1. The pressing device is formed in the at least one heating platen, one of the inlets and outlets is formed on a surface of the at least one hot platen on the workpiece side, and the other of the inlets and outlets is the heating medium pressure adjusting means. It has a heat medium passage for heating medium pressurization connected,
The heating medium pressure adjusting means is a pressure of the heating medium sent from the heating medium pressure adjusting means to the gap between the at least one heating plate and the metal plate via the heating medium pressurizing heating medium passage. The press device according to claim 1 , wherein the press device is adjusted. The at least one hot platen is
A heating part;
A plate-like jacket jig that abuts the one surface abuts on the heat generating portion and the other surface is configured as a surface on the workpiece side of the at least one heating plate;
Have
The press apparatus according to claim 3 , wherein the heat medium passage for heat medium pressurization is formed in the jacket jig. The press apparatus according to claim 4 , wherein the metal plate is welded all around the jacket jig. A groove is formed in a mesh shape on the surface of the at least one hot platen on the workpiece side, and a part of the groove is connected to an inlet / outlet of the heating medium passage for heating medium pressurization, and the heating medium is pressurized. The press apparatus according to any one of claims 3 to 5 , wherein the metal plate is in contact with a surface of the at least one hot platen on the workpiece side when not in operation. The press device according to any one of claims 1 to 6 , wherein a surface of the metal plate that comes into contact with the workpiece is mirror-finished. The press apparatus according to any one of claims 1 to 7 , wherein the metal plate is fixed to each of the pair of heating plates. The press apparatus according to any one of claims 1 to 8 , wherein the heating medium is incompressible. A pressing method in which a workpiece is hot-pressed and molded,
The workpiece is hot-pressed between the heated plates by driving at least one of the heated at least one pair of heated plates,
Covering the workpiece side surface of the hot platen and filling between the hot plate and the metal plate fixed to the hot plate so as to be spaced apart from the workpiece side surface of the hot platen. Pressurizing and holding the heating medium at a predetermined pressure substantially equal to the molding pressure of the workpiece after driving at least one of the pair of heating plates so that the workpiece is pressurized to the molding pressure ; The press method characterized. The heating plate is formed in the heating plate, one of the inlets and outlets is formed on the surface of the heating plate on the workpiece side, and the other of the inlets and outlets is a heating medium pressurizing heating medium passage connected to the heating medium pressure adjusting means. by adjusting the pressure of the previous term heating medium was fed into the gap portion of the at least one of the heat plates via and the metal plate, characterized in that pressurizing the heat medium to a predetermined pressure, claim 10 The pressing method according to 1. The press method according to claim 10 or 11 , wherein after the molding of the workpiece, the pressure on the workpiece is reduced after the pressure of the heating medium is reduced. The heating plate is formed in the heating plate, one of the inlets and outlets is formed on the surface of the heating plate on the workpiece side, and the other of the inlets and outlets is a heating medium pressurizing heating medium passage connected to the heating medium pressure adjusting means. by adjusting the pressure of the fed the previous period heat medium in the gap portion of the at least one of the heat plates via and the metal plate, characterized by reducing the pressure of the heating medium, to claim 12 The pressing method described.

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