TWI628072B - Press machine, vacuum frame and press forming method - Google Patents

Abstract

The press apparatus according to an embodiment of the present invention includes: an upper diaphragm that divides an upper space and an elastic film of the main chamber in the up and down direction; and a lower diaphragm that is disposed opposite to the upper diaphragm and is divided in the up and down direction. An elastic film of the chamber and the lower space; a pneumatic control device that controls a difference in air pressure between the main chamber and the upper space and the lower space; and a heating device that heats the workpiece disposed in the main chamber. The air pressure control device is configured to perform a process of pressing the air pressure in the main chamber to be lower than the air pressure in the upper space and the lower space to perform a workpiece heated between the upper diaphragm and the lower diaphragm. Stamping; and hardening treatment, so that the air pressure in the main chamber is higher than the air pressure in the lower space to heat the workpiece in a non-vacuum state.

Description

Stamping device, vacuum frame and stamping forming method

The present invention relates to a press apparatus, a vacuum frame, and a press forming method for lamination processing of a laminate.

A hot stamping apparatus (hereinafter referred to as a "stacking apparatus") using a separator (elastic film) for laminating a laminate of a solar cell panel or the like is known. In the conventional diaphragm type laminating apparatus disclosed in Patent Document 1, a vacuum chamber is formed between the hot plate and the diaphragm. The object to be processed placed on the hot plate is pressurized between the hot plate and the diaphragm by vacuuming the inside of the vacuum chamber to perform lamination processing.

[First technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2012-196835

In the above-mentioned conventional laminating apparatus, since the workpiece is pressed between the flat top surface of the hot plate and the diaphragm, if the workpiece is not at least one surface flat, the stamping cannot be performed under uniform pressure, and the workpiece cannot be pressed. Perform appropriate lamination processing.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a laminating apparatus which can laminate a workpiece having a non-flat surface on both sides.

According to an embodiment of the present invention, there is provided a press apparatus comprising: an upper diaphragm that defines an elastic film of an upper space and a main chamber in a vertical direction; and a lower diaphragm that is disposed opposite to the upper diaphragm, And separating an elastic film of the main chamber and the lower space in an up-and-down direction; a gas pressure control device controlling a difference in air pressure between the main chamber and the upper space and the lower space; and a heating device disposed in the main cavity The workpiece in the room is heated, and the air pressure control device performs a process of pressing the air pressure in the main chamber to be smaller than the air pressure in the upper space and the lower space to heat between the upper diaphragm and the lower diaphragm. The workpiece is stamped; and a cure process is performed such that the air pressure in the main chamber is greater than the air pressure in the lower space to heat the workpiece under non-vacuum.

According to an embodiment of the present invention, a vacuum frame is provided which is formed into a ring shape and is constructed in such a manner that an airtight main chamber is formed, the lower side of the main chamber being covered by an elastic film, that is, an upper diaphragm The upper chamber and the upper side are sandwiched by a lower chamber covered by an elastic membrane, that is, a lower diaphragm, the air pressure of the main chamber being lower than the air pressure of the upper chamber and the lower chamber, whereby the upper diaphragm is Between the lower diaphragm and the workpiece disposed in the main chamber, the vacuum frame has a vent hole for supplying and discharging the main chamber. The vent hole has an annular portion extending in a direction in which the vacuum frame extends; a first portion extending from the annular portion and opening to an outer circumferential surface of the vacuum frame; and a second portion from the annular portion Extending and opening to the inner peripheral surface of the vacuum frame.

According to an embodiment of the present invention, a press forming method is provided in which a workpiece is disposed in a main chamber which is a pair of elastic membranes disposed between the upper and lower sides, that is, an upper diaphragm and a lower portion. The diaphragm is separately and airtightly partitioned from the upper space and the lower space, and is subjected to a stamping process, wherein the workpiece is heated on the one hand, and the air pressure in the main chamber is lower than the upper space and the lower space on the other hand. Pressurizing the workpiece to be heated between the upper diaphragm and the lower diaphragm, and performing a hardening treatment so that the air pressure in the main chamber is higher than the air pressure in the lower space to The workpiece is heated.

According to the configuration of an embodiment of the present invention, it is possible to laminate a workpiece having a non-flat surface on both sides.

1‧‧‧Multilayer

1a‧‧‧ Ontology

2‧‧‧Control Department

3‧‧‧Pneumatic control device

3a‧‧‧Exhaust line

3b‧‧‧Exhaust line

3c‧‧‧ exhaust line

4‧‧‧Hydraulic control device

10‧‧‧External chamber

20‧‧‧ upper hot plate

20a‧‧‧Ventinel

20U‧‧‧Upper chamber unit

21U‧‧‧ upper diaphragm fixing frame

22U‧‧‧ upper diaphragm

23U‧‧‧ upper diaphragm protection board

24U‧‧‧ upper chamber

26‧‧‧Main chamber

30‧‧‧Intermediate hot plate

37‧‧‧ solenoid valve

40‧‧‧Lower hot plate

40a‧‧‧Ventinel

40L‧‧‧lower chamber unit

41L‧‧‧Lower diaphragm fixing frame

42L‧‧‧ lower diaphragm

43L‧‧‧lower diaphragm forming plate

44L‧‧‧lower chamber

47‧‧‧3 joint solenoid valve

50‧‧‧Hydraulic cylinder

51‧‧‧Cylinder tube

52‧‧‧Plunger

60‧‧‧vacuum frame

60A‧‧‧vacuum frame

60B‧‧‧vacuum frame

60a‧‧‧Cone surface (surface)

60b‧‧‧ Hollow

60c‧‧‧ Ventilation seam

60d‧‧‧vents

60e‧‧‧Conical screw

62‧‧‧Upper components

64‧‧‧lower components

66‧‧‧O-ring

100‧‧‧Multilayer

100a‧‧‧ Ontology

102‧‧‧Control Department

103‧‧‧Pneumatic control device

104‧‧‧Hydraulic control device

110‧‧‧Frame

112‧‧‧ hot plate support organization

112a‧‧‧able sales

120‧‧‧ upper hot plate

120b‧‧‧support plate

120U‧‧‧Upper chamber unit

130‧‧‧Intermediate hot plate

130b‧‧‧Support plate

130L‧‧‧lower chamber unit

130U‧‧‧Upper chamber unit

140‧‧‧Lower hot plate

140L‧‧‧lower chamber unit

P1‧‧‧ pressure

P2‧‧‧ pressure

W‧‧‧Processed matter (layered body)

The first figure is a front perspective view of a lamination device of a first embodiment of the present invention.

The second figure is the A-A arrow view of the first figure.

The third figure is a diagram illustrating the construction of a vacuum frame.

The fourth figure is a view for explaining the sequence of lamination processing of the first embodiment of the present invention.

Figure 5 is a front perspective view of a lamination device of a second embodiment of the present invention.

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

(first embodiment)

The first drawing is a front perspective view of the laminating apparatus 1 of the first embodiment of the present invention, and the second drawing is an A-A arrow view of the first drawing. The laminating apparatus 1 includes a main body 1a, a control unit 2, a pneumatic control device 3, and a hydraulic control device 4. The main body 1a, the air pressure control device 3, and the hydraulic pressure control device 4 are connected to the control unit 2, respectively, and operate under the control of the control unit 2.

The main body 1a includes an outer chamber 10 and an upper hot plate 20, a lower hot plate 40, and a hydraulic cylinder 50 disposed in the outer chamber 10. The external chamber 10 is connected to the air pressure control device 3 through the external chamber supply and exhaust line 3a, and the internal pressure of the external chamber 10 is controlled by the air pressure control device 3 from a vacuum (for example, about 0.1 kPa) to an atmospheric pressure. Above the range (for example, several air pressures).

The hydraulic cylinder 50 (drive device) is connected to the hydraulic control device 4, and operates in accordance with the supply and discharge of hydraulic oil by the hydraulic control device 4. Further, the cylinder tube 51 of the hydraulic cylinder 50 is fixed to the frame of the outer chamber 10.

The upper hot plate 20 is fixed to the frame of the outer chamber 10 with the bottom surface horizontal. Further, the lower hot plate 40 is disposed such that its top surface faces the bottom surface of the upper hot plate 20. The lower hot plate 40 has a ram 52 to which the hydraulic cylinder 50 is fixed on the bottom surface, and corresponds to the supply and discharge of the hydraulic oil to the hydraulic cylinder 50, and moves up and down together with the punch 52.

In addition, the upper hot plate 20 and the lower hot plate 40 are respectively provided with an electric heater (not shown) and a temperature sensor (not shown), and the temperatures of the upper hot plate 20 and the lower hot plate 40 are respectively Controlled by the control unit 2. In addition, a bottom surface of the upper hot plate 20 and a top surface of the lower hot plate 40 are provided For example, a far-infrared radiation material layer (for example, a film or a plate) which uses thermal energy to generate far-infrared rays with high efficiency, can be strongly absorbed by the resin contained in the workpiece W, and can efficiently heat the workpiece W. That is, the upper hot plate 20 and the lower hot plate 40 have a function as a heating device for heating the workpiece W.

The bottom surface of the upper hot plate 20 is mounted with an upper chamber unit 20U. The upper chamber unit 20U includes an upper diaphragm fixing frame 21U, an upper diaphragm 22U, and an upper diaphragm protection plate 23U.

The upper diaphragm 22U is a highly stretchable sheet (elastic film) formed of a synthetic rubber having entropy Elasticity such as silicone.

The upper diaphragm fixing frame 21U is a slightly cylindrical member in which the center axis is disposed in the vertical direction, and the upper end thereof is airtightly joined to the bottom surface of the upper hot plate 20 in an adhered state. For the joining, various methods such as welding, bonding, and pressure-bonding through a sealing material can be used. Further, the upper diaphragm fixing frame 21U has a tapered surface which is formed on the side surface of the truncated cone so that the inner peripheral surface thereof becomes thicker toward the upper hot plate 20. The hollow portion of the upper diaphragm fixing frame 21U has its lower end hermetically sealed by the upper diaphragm 22U. Thereby, the upper hot plate 20, the upper diaphragm fixing frame 21U, and the upper diaphragm 22U form an airtightly enclosed upper chamber 24U. In addition, in the upper portion of the hot plate 20 of the present embodiment, since the vent hole 20a is provided such that the bottom surface thereof communicates with the side surface (even if the upper chamber 24U communicates with the outer chamber 10), the upper chamber 24U and the outer chamber 10 are provided. The internal pressure is approximately the same.

The hollow portion (upper chamber 24U) of the upper diaphragm fixing frame 21U is partitioned by a flat plate disposed in parallel with the bottom surface of the upper diaphragm fixing frame 21U (that is, the upper diaphragm 22U), that is, the upper diaphragm protective plate 23U. The upper diaphragm protection plate 23U is made of, for example, a gas permeable plate having a punching plate or a porous plate in order to avoid a difference in air pressure between the two sides.

On the top surface of the lower hot plate 40, upside down with the upper chamber unit 20U In the manner, the lower chamber unit 40L having the same configuration as the upper chamber unit 20U is attached. That is, the lower chamber unit 40L includes a lower diaphragm fixing frame 41L whose lower end is airtightly joined to the top surface of the lower hot plate 40 in a close contact state, and a lower diaphragm 42L that hermetically seals the lower diaphragm fixing frame The hollow portion of the 41L is attached to the upper end of the lower diaphragm fixing frame 41L, and the lower diaphragm forming plate 43L is attached to the inner peripheral surface of the lower diaphragm fixing frame 41L by dividing the hollow portion upward and downward. The lower diaphragm forming plate 43L is the same as the upper diaphragm protecting plate 23U, and is a permeable plate material. Further, in the lower chamber unit 40L, a lower chamber 44L is formed, which is hermetically surrounded by the lower hot plate 40, the lower diaphragm fixing frame 41L, and the lower diaphragm 42L.

Further, the lower hot plate 40 is provided with a vent hole 40a communicating with the top surface and the side surface thereof. One end of the vent hole 40a is connected to one of the three-way solenoid valves 47. The other joint of the three-way solenoid valve 47 is connected to the air pressure control device 3 through the lower chamber supply and exhaust line 3c, and the remaining one joint is opened to the outside chamber 10. The three-way electromagnetic valve 47 is controlled by the control unit 2, and switches between the state in which the "lower chamber 44L is connected to the external chamber 10" (open state) and the state in which the "lower chamber 44L is connected to the air pressure control device 3" (pressure). Control status).

In addition, an annular vacuum frame is mounted on the top surface of the lower chamber unit 40L. 60, which has substantially the same outer diameter as the lower diaphragm fixing frame 41L. When the lower hot plate 40 is raised and the bottom surface of the upper chamber unit 20U is brought into close contact with the top surface of the vacuum frame 60, the main chamber that is hermetically surrounded by the upper diaphragm 22U, the lower diaphragm 42L, and the vacuum frame 60 is formed. 26 (Fig. 4 (b)). If a difference in air pressure between the internal pressure of the upper chamber 24U and the lower chamber 44L and the internal pressure of the main chamber 26 occurs, the upper diaphragm 22U and the lower diaphragm 42L face the chamber having a lower air pressure in the chambers facing each other. The chamber side is inflated.

Figure 3 (a) is a top view of a portion of the vacuum frame 60, the third view (b) is a B-B arrow view of the third figure (a). As shown in the third diagram (b), in order to prevent the lower diaphragm 42L and the upper diaphragm 22U from expanding toward the main chamber 26 side, it is bent along the corner of the vacuum frame 60 to form a smaller radius of curvature, thereby causing deterioration. Since the damage is caused, a tapered surface (or a curved surface) 60a is formed on the inner peripheral side of the bottom surface of the vacuum frame 60.

The vacuum frame 60 is provided with an annular upper member 62, a lower member 64, and an O-shape, respectively. Ring 66. The upper member 62 and the lower member 64 are vertically overlapped, and the joint portion thereof is sealed by the O-ring 66. Inside the vacuum frame 60, an annular hollow portion 60b (annular portion) is formed which extends around the entire circumference in the extension direction. Further, at a position further inside than the hollow portion 60b, the upper member 62 and the lower member 64 are close to each other and opposed to each other, and a vent slit 60c is formed therebetween to allow the hollow portion 60b to communicate with the main chamber 26. The vent slit 60c is spread over the entire circumference of the vacuum frame 60 and is a slit-shaped air permeable path that opens toward the inner peripheral surface of the vacuum frame 60.

Further, on the outer peripheral side of the vacuum frame 60, a vent hole 60d is formed to allow the hollow portion 60b It is in communication with the outer chamber 10. The vent hole 60d is expanded in diameter on one end side (the outer peripheral surface side of the vacuum frame 60) to form a taper screw 60e. The conical screw 60e is connected to the main chamber supply and exhaust line 3b (first diagram) from the air pressure control device 3, and the gas in the main chamber 26 can be carried through the vacuum frame 60 by the air pressure control device 3. Or the supply and exhaust of an inert gas such as dry nitrogen.

The venting slit 60c is for supplying the exhaust body to the main chamber 26 through the venting slit 60c. The pressure loss is substantially averaged over the entire circumference so that the cross-sectional dimension is formed to be constant over the entire circumference. In addition, the gas supply and discharge in the main chamber 26 is performed by transmitting the hollow portion 60b having a large sectional area and a small pressure loss, and the vent slit 60c having a small sectional area and a large pressure loss. Therefore, the gas supply and discharge to the main chamber 26 is performed substantially uniformly and slowly over the entire circumference from the vent slit 60c.

Next, using the lamination device 1 of the first embodiment of the present invention, the pair is added The order in which the workpiece W is subjected to lamination processing will be described with reference to the fourth drawing.

First, as shown in the fourth figure (a), the hydraulic cylinder 50 (first figure) is driven to make the lower part The hot plate 40 is lowered to separate the upper chamber unit 20U from the vacuum frame 60. At this time, the electromagnetic valve 37 (first diagram) provided in the air pressure control device 3 and the main chamber supply and exhaust line 3b connected to the vent hole 60d (third diagram) of the vacuum frame 60 is closed, and The gas supply and discharge to the vacuum frame 60 is stopped. Further, the three-way solenoid valve 47 connects the lower chamber 44L to the external chamber 10 (first diagram) (open state). Next, after the workpiece W is placed on the lower diaphragm 42L, the external chamber 10 is evacuated by the air pressure control device 3. At this time, the upper chamber 24U and the lower chamber 44L which are respectively communicated with the external chamber 10 are also evacuated by the vent holes 20a and 40a.

Next, as shown in the fourth figure (b), the hydraulic cylinder 50 (first figure) is driven to make the lower part heat The disk 40 is raised to bring the upper chamber unit 20U into close contact with the vacuum frame 60 to form the main chamber 26. At this time, the external chamber 10 (first diagram), the upper chamber 24U, the main chamber 26, and the lower chamber 44L are all vacuumed.

Next, the gas is introduced into the external chamber 10 by the air pressure control device 3, so that The air pressure in the outer chamber 10 is slowly raised to atmospheric pressure (about 100 kPa). At this time, the air pressures of the upper chamber 24U and the lower chamber 44L that communicate with the external chamber 10 rise to the atmospheric pressure, but the inside of the sealed main chamber 26 is maintained in a vacuum state. Therefore, the upper diaphragm 22U and the lower diaphragm 42L are inflated toward the main chamber 26 side by the difference in air pressure between the upper chamber 24U and the lower chamber 44L and the main chamber 26. As a result, as shown in the fourth diagram (c), the workpiece W is sandwiched by the upper diaphragm 22U and the lower diaphragm 42L, and is separated by the air pressure difference between the upper chamber 24U and the lower chamber 44L and the main chamber 26. stamping. Then, when the state is maintained for a predetermined period of time, the workpiece W is heated to the processing temperature by the radiant heat from the upper hot plate 20 and the lower hot plate 40 (the hardening temperature of the resin is used when the thermosetting resin is used) The degree of use of the thermoplastic resin is a temperature equal to or higher than the glass transition point of the resin, and the resin contained in the workpiece W (for example, a thermosetting resin such as an epoxy resin or an ethylene vinyl acetate copolymer resin (EVA) The thermoplastic resin (such as a thermoplastic resin) is softened (in the case of a thermosetting resin, it is further cured), and the members constituting the workpiece W are joined together.

In addition, in the case of generating a gas from the workpiece W in the press processing, it is possible to In the pressure processing, the main chamber 26 is evacuated by the air pressure control device 3 through the main chamber supply and exhaust line 3b connected to the vacuum frame 60. By this, in the press processing, the gas generated from the workpiece W can be forcibly discharged from the main chamber 26, and the joint failure of the workpiece W and the deterioration of the separator due to the generation of gas can be prevented.

After the joining of the workpiece W (stamping step) is completed, the hardening step is followed. The hardening step is a process of stabilizing the workpiece W by holding the workpiece W after bonding at a curing temperature of the resin (a temperature equal to or higher than a glass transition point in the case of a thermoplastic resin). In this embodiment, the hardening step is carried out under non-vacuum (i.e., in air or in an inert gas). Here, the pressure of 0.1 atm or more is referred to as non-vacuum. As shown in the fourth diagram (d), in the hardening step of the present embodiment, the compressed air of the pressure P1 (above atmospheric pressure) is introduced into the main chamber 26 by the air pressure control device 3 (first map). Further, at this time, the three-way solenoid valve 47 switches the state to a state in which the lower chamber 44L is connected to the air pressure control device 3 (pressure control state), and in the lower chamber 44L, the pressure is controlled by the air pressure control device 3. A gas of P2 (below pressure P1) is introduced into the main chamber 26.

At this time, since the internal pressure of the upper chamber 24U is larger than the internal pressure of the main chamber 26, Therefore, the upper diaphragm 22U is largely expanded toward the upper chamber 24U side, and is densely combined with the upper diaphragm protection plate 23U to form a flat surface. The upper diaphragm protection plate 23U prevents deterioration or thermal damage of the upper diaphragm 22U due to contact with the upper hot plate 20 heated to a high temperature. In addition, the upper partition The membrane protective plate 23U is disposed in such a manner as to be close to and parallel to the bottom surface of the upper hot plate 20, and is uniform and efficient by the radiant heat from the upper hot plate 20 when the upper diaphragm 22U is in close contact with the upper diaphragm protective plate 23U. Heat to the proper temperature. Before the press forming, the upper diaphragm 22U is held in close contact with the upper diaphragm protection plate 23U, and the upper diaphragm 22U can be preheated. Further, the lower diaphragm forming plate 43L also has the same operational effects as the upper diaphragm protecting plate 23U.

On the other hand, the lower diaphragm 42L because of the internal pressure P2 of the lower chamber 44L and the main Since the difference of the internal pressure P1 of the chamber 26 is small, it does not come into contact with the lower diaphragm forming plate 43L, but expands toward the lower chamber 44L side corresponding to the internal pressure difference. In the present embodiment, in the state in which the workpiece W is placed on the lower diaphragm 42L, the internal pressure difference when the lower diaphragm 42L is bent along the bottom surface of the workpiece W is calculated in advance, or This value is obtained experimentally, and the air pressure control device 3 controls the internal pressure P2 of the lower chamber 44L so that the obtained internal pressure difference is applied to the lower diaphragm 42L. As a result, the workpiece W has substantially the entire surface of the bottom surface thereof supported by the lower diaphragm 42L having the same curvature, and is supported by the substantially uniform pressure, and can be performed in a state where the strain applied to the workpiece W is small. Hardening treatment. As a result, the residual stress is reduced, and a highly reliable product (work W) can be obtained.

In addition, as shown in the fourth figure (e), the workpiece W has a flat bottom surface. In this case, the three-way solenoid valve 47 (open state) is switched in such a manner that the lower chamber 44L is opened to the outer chamber 10 to increase the internal pressure difference between the lower chamber 44L and the main chamber 26. As a result, the lower diaphragm 42L expands substantially toward the lower chamber 44L side, and is in close contact with the lower diaphragm forming plate 43L to form a flat surface. Thereby, since the workpiece W is supported by the flat lower diaphragm 42L with a uniform pressure, the workpiece W can be hardened in a state where the strain is small, and as a result, the residual stress is reduced, and a highly reliable product can be obtained ( Workpiece W).

(Second embodiment)

Next, a lamination device 100 according to a second embodiment of the present invention will be described. The fifth figure is a front perspective view of the lamination device 100. In the following description, the same or similar components as those of the above-described first embodiment are used, and the same or similar reference numerals are used, and the description of the duplicated items is omitted.

In the first embodiment described above, the present invention is applied to an example of a single-stage lamination apparatus, and in the second embodiment, the present invention is applied to providing more than one between the upper hot plate 120 and the lower hot plate 140. An example of a multi-stage lamination device of the intermediate hot plate 130. In the laminating apparatus 100 of the present embodiment, the intermediate hot plate 130 is provided. However, two or more intermediate hot plates 130 may be disposed between the upper hot plate 120 and the lower hot plate 140 in parallel with each other.

A lower chamber unit 130L and an upper chamber unit 130U are attached to the top surface and the bottom surface of the intermediate hot plate 130, respectively. The upper chamber unit 130U is the same device as the upper chamber unit 120U (corresponding to the upper chamber unit 20U in the first embodiment) mounted on the bottom surface of the upper hot plate 120; the lower chamber unit 130L is The same device is mounted on the lower surface chamber unit 140L (corresponding to the lower chamber unit 40L in the first embodiment) of the lower surface of the lower heat tray 140.

In the first embodiment described above, the main body 1a of the lamination device 1 is entirely housed in the external chamber 10, and the inside of each of the chambers (the upper chamber 24U and the lower chamber 44L) is controlled by the external chamber 10. In the second embodiment, the external chamber 10 is not provided, but "each chamber unit (upper chamber unit 120U, 130U, lower chamber unit 130L, 140L) and air pressure control are employed. The device 103 is directly connected to the air pressure control device 103 to individually control the internal pressure of each chamber unit. In this configuration, it is not necessary to evacuate the entire outer chamber 10 having a large volume, so that the time required for vacuuming can be greatly reduced, and the time for the entire process can be shortened.

In addition, in this embodiment, since the vacuum frames 60A, 60B are installed in the upper chamber Since the chamber units 20U and 30U form a completely flat top surface of the lower chamber units 130L and 140L on which the workpiece W is placed, the workpiece W can be easily carried in and out of the lamination apparatus 100.

Mounted on the upper hot plate 120 and the intermediate hot plate 130 of the lamination device 100 A pair of support plates 120b and 130b that do not protrude from the left and right sides. Further, on the frame 110 of the lamination device 100, two pairs of hot plate supporting mechanisms 112 (only a pair in front are shown) which are disposed opposite to the width direction (the horizontal direction in the fifth drawing) are attached. The hot plate supporting mechanism 112 is configured such that when the workpiece W before processing is carried into the laminating apparatus 100 or the processed workpiece (product) W is carried out from the laminating apparatus 100, the upper and lower chamber units have With the interval, the hot plate directly above the workpiece W to be conveyed can be held at a predetermined height.

The hot plate support mechanism 112 has a movable pin that can move back and forth in the width direction 112a. The hot plate supporting mechanism 112 is connected to the control unit 102, and the control unit 102 controls the driving of the movable pin 112a. In the state in which the movable pin 112a is retracted (moving outward in the width direction of the main body 100a), the hot plate supporting mechanism 112 does not hinder the vertical movement of the upper hot plate 120 and the intermediate hot plate 130, and the movable pin 112a protrudes (to the body). The state of the 100a inward in the width direction is disposed so as to be in contact with the support plate 120b of the upper hot plate 120 or the support plate 130b of the intermediate hot plate 130.

Next, the stacking of the workpiece W when it is carried out/loaded into the laminating apparatus 100 will be described. Set the action of 100. In the lamination processing (pressing processing), the movable pin 112a of each hot plate supporting mechanism 112 is retracted, and the intermediate hot plate 130 is placed on the lower hot plate 140, and the upper hot plate is placed on the intermediate hot plate 130. The state of 120. In this state, when the hydraulic cylinder 150 is driven to move the lower hot plate 140 up and down, the intermediate hot plate 130 and the upper hot plate 120 stacked on the lower hot plate 140 move up and down along with the lower hot plate 140.

The workpiece W is carried out/loaded between the upper hot plate 120 and the intermediate hot plate 130. At this time, the hydraulic cylinder 150 is driven to raise the lower hot plate 140 until the position of the support plate 120b of the upper hot plate 120 is slightly higher than the movable pin 112a of each of the hot plate supporting mechanisms 112. Next, the movable pin 112a of each of the hot plate supporting mechanisms 112 is caused to protrude toward the upper hot plate 120 side. In this state, when the hydraulic cylinder 150 is driven to lower the lower hot plate 140, the bottom surface of the support plate 120b of the upper hot plate 120 abuts against the movable pin 112a of each hot plate supporting mechanism 112, and the upper hot plate 120 is placed on the second. Above the movable pin 112a. If the lower hot plate 140 is further lowered, the intermediate hot plate 130 is lowered together with the lower hot plate 140, but the upper hot plate 120 is supported by the two pairs of movable pins 112a without being lowered, so that the intermediate hot plate 130 is heated from the upper portion. Disk 120 leaves. Next, when the interval between the upper hot plate 120 and the intermediate hot plate 130 is sufficient to carry out the loading/unloading of the workpiece W, the driving of the hydraulic cylinder 150 is stopped.

Next, between the intermediate hot plate 130 and the lower hot plate 140, the workpiece W is moved. In the case of the loading/unloading, the hydraulic cylinder 150 is driven to raise the lower hot plate 140 until the upper hot plate 120 is placed on the intermediate hot plate 130, and the support plate 120b is slightly floated on the movable pin 112a of each of the hot plate supporting mechanisms 112. Up until now. Next, after the movable pin 112a of each hot plate supporting mechanism 112 is retracted, the hydraulic cylinder 150 is driven to raise the lower hot plate 140 until the position of the support plate 130b of the intermediate hot plate 130 is slightly higher than that of each of the hot plate supporting mechanisms 112. The movable pin 112a is up. Next, after the movable pin 112a of each hot plate supporting mechanism 112 is protruded toward the intermediate hot plate 130 side, the hydraulic cylinder 150 is driven to lower the lower hot plate 140, and the bottom surface of the support plate 130b of the intermediate hot plate 130 abuts against each heat. The movable pin 112a of the disk support mechanism 112 is such that the intermediate hot plate 130 is placed above the two pairs of movable pins 112a. Further, if the lower hot plate 140 is lowered, the intermediate hot plate 130 is supported by the two pairs of movable pins 112a without falling, so that the lower hot plate 140 is separated from the intermediate hot plate 130. Then, if the intermediate hot plate 130 and the lower hot plate 140 are spaced apart to a size sufficient to carry out the loading/unloading of the workpiece W, the oil pressure is stopped. The drive of the cylinder 150. Then, when the loading/unloading of the workpiece W is completed, the hydraulic cylinder 150 is driven to raise the lower hot plate 140 until the intermediate hot plate 130 is placed on the lower hot plate 140, and the support plate 130b of the intermediate hot plate 130 is slightly The floating pin 112a of each of the hot plate supporting mechanisms 112 is floated on the movable pin 112a of each hot plate supporting mechanism 112, and then the movable pin 112a of each hot plate supporting mechanism 112 is retracted.

The above description of the embodiments of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit and scope of the invention.

In each of the above embodiments, the heating of the hot plate is performed using an electrothermal heater, but other heating means may be used as the heating means for heating the hot plate. For example, as disclosed in International Publication No. 2006/103868, a heat medium such as eucalyptus oil may be introduced into a flow path provided in a hot plate to uniformly heat the hot plate.

Further, in each of the above embodiments, a cylindrical upper (lower) diaphragm fixing frame and a vacuum frame are used. However, the present invention is not limited to this configuration, and an upper portion of another shape (for example, a polygonal tube shape) may be used ( Lower part) diaphragm fixing frame and vacuum frame.

Further, in each of the above-described embodiments, a flat-shaped lower diaphragm forming plate is used, but a lower diaphragm forming plate having the same shape as the bottom surface of the workpiece W may be used. In this case, when the hardening treatment is performed, the internal pressure of the main chamber is sufficiently higher than the internal pressure of the lower chamber, and the lower diaphragm is brought into close contact with the lower diaphragm forming plate, whereby the lower diaphragm can be formed and processed. The bottom surface of W has the same shape. Thereby, since the workpiece W is supported by the lower diaphragm with a uniform pressure, the residual stress is small, and a highly reliable product (the workpiece W) can be obtained.

Claims (35)

A press device comprising: an upper diaphragm defining an elastic film of an upper space and a main chamber in a vertical direction; and a lower diaphragm disposed opposite to the upper diaphragm and dividing the main cavity in an up-and-down direction An elastic film of the chamber and the lower space; a gas pressure control device that controls a difference in air pressure between the main chamber and the upper space and the lower space; and a heating device that heats the workpiece disposed in the main chamber, the air pressure control device Performing a treatment of pressing the air pressure in the main chamber to be lower than the air pressure in the upper space and the lower space to press the workpiece heated between the upper diaphragm and the lower diaphragm; and hardening The (Cure) treatment is such that the gas pressure in the main chamber is higher than the air pressure in the lower space to heat the workpiece under non-vacuum. The press device according to claim 1, wherein the air pressure control device is configured to cause the lower diaphragm to follow the workpiece in the hardening process in a case where the bottom surface of the workpiece is a curved convex surface The bottom surface is curved, and the workpiece is supported at a substantially uniform pressure to control the difference in air pressure between the main chamber and the lower space. The stamping apparatus of claim 1, further comprising: a diaphragm forming plate having a flat top surface opposed to the lower diaphragm in the lower space, the air pressure control device being flat on a bottom surface of the workpiece In the case of In the hardening treatment, the lower diaphragm is brought into close contact with the diaphragm forming plate to form a flat surface, and the workpiece is supported by a substantially uniform pressure, and the air pressure difference between the main chamber and the lower space is controlled. The stamping apparatus according to any one of claims 1 to 3, further comprising: an upper chamber unit having the upper diaphragm on a bottom surface and hermetically enclosing the upper space; and a lower chamber unit at the top The lower diaphragm has a lower diaphragm and hermetically encloses the lower space; a vacuum frame is disposed between the upper chamber unit and the lower chamber unit, and has a hollow portion penetrating vertically; and a driving device At least one of the upper chamber unit and the lower chamber unit is driven, and the vacuum chamber is sandwiched between the upper chamber unit and the lower chamber unit by driving of the driving device, thereby forming the main chamber. The stamping device of claim 4, wherein the heating device comprises: an upper hot plate, the upper chamber unit is fixed to a bottom surface thereof; an upper hot plate heating means for heating the upper hot plate; a lower hot plate, the lower portion The chamber unit is fixed to the top surface thereof; and the lower hot plate heating means heats the lower hot plate, and the bottom surface of the upper hot plate and the top surface of the lower hot plate are provided with a far-infrared radiation material layer. The stamping device of claim 5, wherein the upper chamber unit and the lower chamber unit respectively comprise a diaphragm fixing frame having Opening the hollow portion up and down, the diaphragm fixing frame, one end surface in each of the upper and lower directions is closely fixed to the bottom surface of the upper hot plate or the top surface of the lower hot plate, and is formed on the other end surface in the up and down direction The hollow opening is hermetically sealed by the upper diaphragm or the lower diaphragm. The stamping apparatus of claim 5, wherein the upper hot plate forms a first vent hole for performing gas supply and discharge to the upper space; and the lower hot plate forms a second vent hole. The supply and discharge of gas to the lower space is performed. The stamping device of claim 7, wherein the first venting hole communicates a bottom surface of the upper hot plate with a side surface; and the second venting hole communicates a top surface of the lower hot plate with a side surface. The stamping device of claim 7, further comprising: an outer chamber accommodating the upper hot plate, the upper chamber unit, the vacuum frame, the lower chamber unit and the lower hot plate, and the air pressure The control device is connected, the first vent hole and the second vent hole are open toward the external chamber, and the air pressure of the upper space and the lower space is controlled by controlling the air pressure of the external chamber. The stamping device of claim 7, further comprising: an outer chamber accommodating the upper hot plate, the upper chamber unit, the vacuum frame, the lower chamber unit and the lower hot plate, and the air pressure Control device connection; and three-way switching valve, a first joint of the three-way switching valve is connected to the second venting hole, a second joint of the three-way switching valve is opened toward the outer chamber, and a third joint of the three-way switching valve is connected to the air pressure control device, Controlling the air pressure of the outer chamber by controlling the air pressure of the outer chamber when the first joint is connected to the second joint, so that the first joint and the first joint are When the third joint is connected, when the three-way switching valve is switched, the air pressure in the lower space is directly controlled by the air pressure control device. The press apparatus of claim 7, wherein at least one of the first vent hole and the second vent hole is connected to the air pressure control device. The stamping device of claim 5, wherein the heating device comprises: one or more intermediate hot plates, wherein the lower chamber unit is fixed to the top surface thereof while the upper chamber unit is fixed to the bottom surface thereof, and Arranging between the upper hot plate and the lower hot plate; and one or more intermediate hot plate heating means respectively heating the one or more intermediate hot plates, wherein the top and bottom surfaces of the intermediate hot plate are provided with a far infrared radiation material layer . The stamping apparatus of claim 12, wherein the intermediate hot plate is formed with: a third vent hole for performing gas supply and discharge to the upper chamber; and a fourth vent hole for performing the lower chamber The supply of gas. The stamping device of claim 13, wherein the third vent hole connects the bottom surface of the intermediate hot plate to the side surface; The fourth vent hole connects the top surface of the intermediate hot plate to the side surface. The stamping device of claim 12, further comprising: a diaphragm protection plate disposed between the upper diaphragm and the upper hot plate or the intermediate hot plate to prevent the upper diaphragm and the upper hot plate from being The contact of the intermediate hot plate. The stamping device of claim 5, wherein the driving device is a hydraulic cylinder, and the lower hot plate is fixed to a punching cylinder of the hydraulic cylinder. The press apparatus of claim 4, wherein the vacuum frame forms a fifth vent hole connected to the air pressure control device, and the main chamber is supplied with gas. The press device of claim 17, wherein the fifth vent hole has an annular portion extending in a direction in which the vacuum frame extends; and a first portion extending from the annular portion to the vacuum frame The outer peripheral surface opening; and the second portion extends from the annular portion and opens to the inner peripheral surface of the vacuum frame. A press apparatus according to claim 18, wherein the second portion is formed in a slit shape which is developed in a direction in which the vacuum frame extends. A press apparatus according to claim 18, wherein the pressure loss when the gas passes through the second portion is larger than the pressure loss when the gas passes through the first portion. A press apparatus according to claim 1, wherein the air pressure control device causes the air pressure in the main chamber to be a vacuum and the air pressure in the upper space and the lower space to be atmospheric pressure. The press device of claim 15, wherein the air pressure control device controls the upper portion in a manner to expand the upper diaphragm and adhere to the diaphragm protection plate before or during the pressing treatment. The space is different from the air pressure in the main chamber. The press device of claim 3, wherein the diaphragm forming plate is formed with a vent hole. The press apparatus of claim 1, wherein the workpiece is a laminate and is subjected to lamination processing, and the workpiece is pressed under heating to process the workpiece. The constituent members of the object are joined together. The press device of claim 15, wherein the diaphragm protection plate is formed with a vent hole. A vacuum frame is formed in an annular shape, wherein an upper chamber covered by an elastic film, that is, an upper diaphragm, is sandwiched between a lower chamber covered by an elastic membrane, that is, a lower diaphragm, to form an airtight shape. The main chamber is processed between the upper diaphragm and the lower diaphragm by the air pressure of the main chamber being lower than the air pressure of the upper chamber and the lower chamber Stamping, wherein the main chamber is provided with a vent hole for the air supply and exhaust body, the vent hole having an annular portion extending in a direction in which the vacuum frame extends; and a first portion extending from the annular portion Opening to the outer peripheral surface of the vacuum frame; and the second portion extending from the annular portion and opening to the inner peripheral surface of the vacuum frame. Such as the vacuum box of claim 26, wherein The second portion is formed in a slit shape that is developed in the extending direction of the vacuum frame. A vacuum frame according to claim 26 or 27, wherein the pressure loss caused by the passage of the gas through the second portion is greater than the pressure loss caused by the gas passing through the first portion. A press forming method for arranging a workpiece in a main chamber, wherein the main chamber is separated from the upper space and the lower space by a pair of elastic films arranged in the upper and lower directions, that is, an upper diaphragm and a lower diaphragm. The dense ground is divided; the step of performing a stamping process, on the one hand, heating the workpiece, on the one hand, the air pressure in the main chamber is lower than the air pressure in the upper space and the lower space, and the upper diaphragm and the upper The workpiece heated between the lower diaphragms is pressed; and the hardening treatment is performed such that the air pressure in the main chamber is higher than the air pressure in the lower space to heat the workpiece in a non-vacuum state. The press forming method according to claim 29, wherein, in the hardening treatment, when the bottom surface of the workpiece is a curved convex surface, the lower diaphragm is bent along a bottom surface of the workpiece. The manner in which the workpiece is supported by a substantially uniform pressure controls the difference in air pressure between the main chamber and the lower space. The press forming method according to claim 30, wherein the diaphragm forming plate having a flat top surface is disposed in the lower space so as to face the lower diaphragm; and the bottom surface of the workpiece is a flat surface In the case of the hardening treatment, the lower diaphragm is brought into close contact with the top surface of the diaphragm forming plate to form a flat surface, and further The manner in which the uniform pressure supports the workpiece controls the difference in air pressure between the main chamber and the lower space. The press forming method according to any one of claims 29 to 31, wherein a hot plate is disposed on the upper space side so as to face the upper diaphragm; between the upper diaphragm and the hot plate, Providing a diaphragm protection plate for preventing the upper diaphragm from contacting the hot plate; before the pressing treatment or during the hardening treatment, the upper diaphragm is expanded toward the upper space side to be in close contact with the diaphragm protection plate And controlling a difference in air pressure between the main chamber and the upper space. The press forming method according to any one of claims 29 to 31, wherein a vacuum frame having a hollow portion penetrating vertically is disposed between the upper diaphragm and the lower diaphragm; and the workpiece is placed After the lower diaphragm is moved, at least one of the upper diaphragm and the lower diaphragm is moved up and down, and the vacuum chamber is hermetically sandwiched by the upper diaphragm and the lower diaphragm to form the main chamber. The press forming method according to any one of claims 29 to 31, wherein in the press working, the air pressure in the main chamber is made vacuum, and the air pressure in the upper space and the lower space is atmospheric pressure. The press forming method according to any one of claims 29 to 31, wherein the workpiece is a laminate and is subjected to lamination processing, and the lamination is processed while being heated. The object is pressed, and the constituent members of the workpiece are joined together.