JP2020146703A - Press device and method for molding press device - Google Patents

Abstract

To provide a press device capable of pressure-molding a workpiece at high accuracy having little influence of upper board warping at pressure application on the workpiece, and to provide a method for molding press device.SOLUTION: A press device 11 pressurizes a workpiece P between an upper pressurizing member 17 provided at an upper board 16 side, and a lower pressurizing member 15 provided at a movable board 14 side by a ram 13 of a pressurizing cylinder 12 by lifting the lower pressurizing member. In the device, a spacer member 25 having a prescribed height h for indirectly applying a reaction force to the workpiece P facing the ram 13 is installed between the upper board 16 and the upper pressurizing member 17.SELECTED DRAWING: Figure 3

Description

The present invention is a press device in which a lower pressurizing member provided on the movable platen side is raised by a ram of a pressurizing cylinder, and a work material is pressed between the lower pressurizing member and the upper pressurizing member provided on the upper plate side. It relates to a molding method of a pressing device.

As the press device, those described in Patent Document 1 to Patent Document 3 are known. Patent Document 1 has a structure in which the upper plate 2 is supported by a press body without using a tie bar. Further, the press device shown in FIG. 6 of Patent Document 2 is called a "pitless type", in which the movable platen 96 is pulled toward the fixed platen 97 by the cylinder device 100. Further, in Patent Document 2, in order to prevent the warp of the movable plate during pressurization from extending to the material to be processed and forming a so-called “drum-shaped” cross section in the central portion, the central portion of the movable plate is formed. It is described that a central pressing member for pressing a substantially central portion of the hot plate is provided. Further, in Patent Document 3, the cross-sectional diameter of the ram of the movable plate is substantially the same as the length of one side of the movable plate, the size of the hot plate is substantially the same as that of the movable plate, and the material to be processed is the cross-sectional area of the ram. It is described that it is placed within the range of the above and heat-compressed. As a result, Patent Document 3 describes that the pressing force of the ram can be efficiently and effectively applied to the hot plate, and the pressing force can be applied to the entire work material with a uniform pressure.

JP-A-5-131473 (Claim 1, FIG. 1) JP 2001-205500 (Claims 1, 0004, 0005, FIGS. 4, 6) JP-A-2000-117492 (Claims 1, 0007, FIGS. 1, 2)

However, with respect to Patent Documents 1 to 3, no effective countermeasures have been taken for the problem of warpage of the upper plate during pressurization and various problems associated therewith. Patent Document 1 attempts to solve the above problem by increasing the thickness of the upper plate. However, even if the thickness of the upper plate is increased as in Patent Document 1, the warp of the upper plate cannot be completely eliminated in spite of the increase in weight. As a result, the tendency of the work material to be pressurized between the hot plates to have a thicker drum-shaped central portion was not eliminated. Further, in the hot press apparatus, if the thickness of the central portion of the material to be processed becomes thick and the thickness of the peripheral portion becomes thin during pressurization, there is a problem that gas generated from the material to be processed is difficult to escape.

Further, in Patent Document 2, as shown in FIG. 4, the central pressing member causes the lower hot plate to warp in a convex shape and the upper plate and the upper hot plate to warp in a concave shape, resulting in high parallelism. The aim was to mold the work material, but it allowed the warp of the work material. Further, in Patent Document 3, since the material to be processed is placed in the cross section of the ram of the lower hot plate, the problem of warpage does not occur in the lower hot plate, but the warp of the upper plate is dealt with. As with Patent Document 2, effective measures have not been taken. As a result, the same problem as in Patent Document 2 was inherent.

In view of the above problems, the present invention provides a pressing device and a forming method for the pressing device, in which the warp of the upper plate during pressurization hardly reaches that of the material to be processed and high-precision pressure forming can be performed. With the goal.

In the press device according to claim 1 of the present invention, the lower pressurizing member provided on the movable platen side is raised by the ram of the pressurizing cylinder, and is applied to the upper pressurizing member provided on the upper plate side. In a press device in which a work material is pressed, a spacer member having a predetermined height that indirectly applies a reaction force to the work material facing the ram is attached between the upper plate and the upper pressure member. It is characterized by being done.

In the press device according to claim 2 of the present invention, the lower pressurizing member provided on the movable platen side is raised by the ram of the pressurizing cylinder, and the lower pressurizing member is placed between the press device and the upper pressurizing member provided on the upper plate side. In a press device in which a work material is pressed, a horizontal cross-sectional area of 95% to 110% of the horizontal cross-sectional area of the ram facing the ram is between the upper plate and the upper pressurizing member. It is characterized in that a spacer member having a predetermined height is provided.

The press device according to claim 3 of the present invention is characterized in that, in claim 1 or 2, the height of the spacer member is larger than the thickness of the upper plate.

In the molding method of the press device according to claim 4 of the present invention, the lower pressurizing member provided on the movable platen side is raised by the ram of the pressurizing cylinder, and the lower pressurizing member is provided with the upper pressurizing member provided on the upper plate side. In the molding method of the press device in which the work material is pressed between the upper plates, a predetermined height is provided between the upper plate and the upper pressure member to indirectly apply a reaction force to the work material facing the ram. A provided spacer member is attached, and the work material is arranged in a portion of the upper pressurizing member that projects a cross section of both the ram and the spacer member, and is pressurized by the ram.

In the press device of the present invention, the lower pressurizing member provided on the movable platen side is raised by the ram of the pressurizing cylinder, and the work material is pressurized with the upper pressurizing member provided on the upper platen side. In the press device, a spacer member having a predetermined height that indirectly applies a reaction force to the work piece facing the ram is attached between the upper plate and the upper pressurizing member, so that the accuracy is high. Pressure molding can be performed.

It is a front view of the main part of the press apparatus of this embodiment. It is a top view of the main part of the press apparatus of this embodiment. It is a front view of the main part which shows the state at the time of pressurization of the press apparatus of this embodiment.

The press device 11 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. The press device 11 raises the hot plate 15 which is the lower pressurizing member provided on the movable platen 14 side by the ram 13 of the pressurizing cylinder 12, and the hot plate which is the upper pressurizing member provided on the upper plate 16 side. The material P to be processed is pressurized with respect to 17.

The press device 11 includes a pressure cylinder 12 on the lower side. The pressurizing cylinder 12 is fixed to a base (not shown) or placed in a factory pit. In the present embodiment, the pressure cylinder 12 is a single-acting cylinder provided with an oil chamber 18, and includes a solid columnar ram 13 that moves up and down with respect to the cylinder cylinder 19. The hydraulic mechanism and control mechanism such as a pump connected to the oil chamber 18 will not be illustrated.

The base portion 20 of the pressure cylinder 12 has a rectangular shape and has a predetermined thickness, and tie bars 21 are vertically fastened with nuts in the vicinity of the four corners thereof. The upper portion of the tie bar 21 is fastened with nuts near the four corners of the upper plate 16 having a rectangular shape and a predetermined plate thickness. The front end surface 22 of the ram 13 is fixed to the back surface of the movable board 14. The movable platen 14 having a rectangular shape and a constant plate thickness is provided with tie bar insertion holes 23 near the four corners, and the tie bar 21 is inserted into the tie bar insertion holes 23. Therefore, the movable board 14 can be moved up and down by being guided by the tie bar 21 as the ram 13 goes up and down. The tie bar 21 is not essential in the present invention, and the upper board may be supported by the main body as in Patent Document 1.

The back surface of the rectangular hot plate 15 which is a lower pressurizing member is fixed to the upper surface of the movable platen 14. The hot plate 15 is a plate having a predetermined thickness and having a flat upper surface formed of a molded surface. A pipe line 24 is formed in the hot plate 15, and a heat medium is supplied into the pipe line 24 from a heat medium device (not shown) so that the hot plate is heated or cooled.

A spacer member 25 having a predetermined height h is fixed to the center of the lower surface of the upper plate 16. The spacer member 25 is fixed at a position where it does not come into contact with the inner portion of the tie bar 21. In the present embodiment, the spacer member 25 is a steel body made of a columnar solid block, and its diameter is the same as the diameter of the ram 13. The horizontal cross-sectional shape of the spacer member 25 may be circular, rectangular, rectangular with curved corners, polygonal, or the like. When the spacer member 25 is rectangular, it may be the same as the shape of the hot plate 17 (including the rectangular shape) or similar to the shape of the hot plate 17. In the present embodiment, the horizontal cross section of the spacer member 25 is the same as the horizontal cross section of the ram 13, but it may be substantially the same as the cross section of the ram 13.

Regarding the horizontal cross section of the spacer member 25, specifically, when the spacer member 25 is a rectangular parallelepiped having a square cross section and is inscribed in the columnar ram 13 when projected from above, the spacer member 25 is described above. The cross-sectional area is 64% (rounded to the nearest whole number) of the cross-sectional area of the ram 13. When the spacer member 25 is a rectangular parallelepiped having a square cross section and circumscribes the columnar ram 13 when projected from above, the cross section of the spacer member 25 is 127% of the cross section of the ram 13. Rounded to the nearest whole number). Alternatively, when the spacer member 25 is cylindrical and the diameter is 90% of the diameter of the ram, the cross section of the spacer member 25 is 81% (rounded to the nearest whole number) of the cross section of the ram 13. Further, when the spacer member 25 is cylindrical and the diameter is 110% of the diameter of the ram 13, the cross section of the spacer member 25 is 121% (rounded to the nearest whole number) of the cross section of the ram 13. Therefore, the cross section of the spacer member 25 is preferably 64% to 127% with respect to the cross section of the ram 13, and further is 81% to 121% with respect to the cross section of the ram 13. Is desirable. Even more preferably, the cross section of the spacer member 25 should be in the substantially same range of 95% to 110% with respect to the cross section of the ram 13.

The spacer member 25 has a predetermined height h that indirectly applies a reaction force to the work piece P facing the ram 13, and the warp of the upper plate 16 during pressurization is the upper pressurizing member. It has the purpose of making it difficult to reach a certain hot plate 17. In the present embodiment, the height h (thickness) of the cylinder is larger than the diameter of the spacer member 25, which is a solid cylinder. When the spacer member 25 is a rectangular parallelepiped having a square cross section, the height h is made larger than the length of the side in the horizontal direction. However, when the press device 11 has a limitation on the stroke of the pressure cylinder 12 and the total height of the device, it is not always necessary to make the value of the predetermined height h larger than the diameter of the spacer member 25 or the like. If the height h is made larger than the diameter of the spacer member 25, the influence on the work material P due to the deformation of the upper plate 16 at the time of pressurization can be further reduced, which is the processing required for the work material P. It is determined by the relationship with accuracy and so on.

Further, in the comparison between the height h (thickness) of the spacer member 25 and the plate thickness of the hot plate 17, the height h of the spacer member 25 has a larger value than the plate thickness of the hot plate 17. Further, in the present invention, the warp of the upper plate 16 at the time of pressurization is allowed, and in the comparison between the height h of the spacer member 25 and the plate thickness of the upper plate 16, the spacer member 25 is more than the thickness of the upper plate 16. The height h of is larger. As a result, in the present invention, the plate thickness of the upper plate 16 can be made thinner than that of the upper plate of the conventional press device. More specifically, the total weight of the weight of the upper plate 16 and the weight of the spacer member 25 of the present embodiment can be equal to or further reduced with respect to the weight of the upper plate of the conventional press device.

As long as the spacer member 25 has a predetermined height h, it may be not only one made of one block body but also a combination of a plurality of block bodies. Further, the upper surface or the lower surface of the spacer member 25 is formed into a convex or concave spherical surface, and the lower surface of the facing upper plate 16 and the back surface of the hot plate 17 are formed into a concave or convex spherical surface so that the spherical surfaces are in surface contact with each other. You may. Alternatively, when the spacer member 25 is formed of a plurality of block bodies, the contact surfaces of the block bodies may be a convex spherical surface and a concave spherical surface so that the two are in surface contact with each other. As a result, even if there is a slight error in the parallelism between the hot plate 15 and the hot plate 17, it can be expected that the spherical surfaces change their positions during pressurization to improve the parallelism between the hot plate 15 and the hot plate 17. .. Furthermore, if a heat insulating plate or the like is added to the spacer member 25 to add a heat insulating function, it is possible to prevent the heat from the hot plate 17 from being transferred to the upper plate 16, and the influence of thermal expansion can be reduced. Can be done. Further, the spacer member 25 may be provided with a cooling pipeline for cooling.

The back surface of the rectangular hot plate 17, which is a lower pressurizing member, is fixed to the circular front end surface 26 of the spacer member 25. In the present embodiment, since the hot plate 17 is in contact with the spacer member 25 so as to cover the entire surface, the area of the hot plate in the horizontal direction is larger than the area of the spacer member 25 in the horizontal direction (area of the front end surface). It's getting a little bigger. However, the horizontal area of the hot plate may be substantially the same as the horizontal area of the spacer member 25 (the area of the front end surface), or the horizontal area of the hot plate may be slightly smaller.

The hot plate 17 is a plate body having a predetermined thickness like the hot plate 15 and having a flat lower surface formed of a molded surface. A pipe line 27 is formed in the hot plate 17, and a heat medium is supplied into the pipe line 27 from a heat medium device (not shown) to heat or cool the hot plate. The hot plates 15 and 17 may have a heater incorporated inside. Further, the lower pressurizing member and the upper pressurizing member may be cold press pressurizing plates to which only the refrigerant is supplied from the cooling device.

When the press device 11 is used in a vacuum state or an atmosphere state of an inert gas, the entire device is housed in a chamber including an opening / closing door. Further, the press device 11 is provided with a loading device and a unloading device for the material P to be processed, if necessary.

Next, the molding method of the press device 11 will be described with reference to FIGS. 1 to 3. First, as shown in FIG. 1, the ram 13 of the pressurizing cylinder 12 of the press device 11 is lowered, and the movable plate 14 and the hot plate 15 are lowered accordingly, and the hot plate is lowered by a loading device (not shown). The work material P is carried in and placed on the 15. The work material P suitable for the present invention is a work material such as a substrate that requires high parallelism, a work material P that generates gas during heating and needs to be discharged.

As shown in FIG. 2, the work material P arranged on the upper surface of the hot plate 15 which is the lower pressurizing member is the ram 13 and the spacer member 25 arranged to face the ram 13 when viewed from above. It is placed in the projected portion of both cross sections. Therefore, the work material P is smaller than the area of the ram 13 and the spacer member 25, and a part of the work material P is arranged so as to protrude from the projected portion of the ram 13 or the projected portion of the spacer member 25. Is not allowed. Regarding the relationship between the hot plate 15 and the work material P, it goes without saying that the entire work material P is placed on the hot plate 15, but the temperature of the edge portion of the hot plate 15 is lower than that of the central portion. In some cases, it may not be stable, and it is desirable that the hot plate 15 be placed on the temperature-stable portion on the central portion side where the temperature is stable.

The work material P may be a material in which substrates or the like are stacked or a single material, and the thickness, shape, and number are not limited. Further, the work material P may be a material in which press plates and cushioning materials are stacked one above the other. In that case, the end portion of the press plate or the like that is not directly subjected to the pressing force or the reaction force may protrude from the projected portion of the ram 13 or the projected portion of the spacer member 25. Therefore, in the present invention (claim 4), the press plate or the like that is not directly subjected to the pressing force or the reaction force is not included in the work material P.

When the placement of the work material P on the hot plate 15 is completed, in the case of the press device 11 using the vacuum chamber, the inside of the chamber is evacuated, and then the hydraulic oil is placed in the oil chamber 18 of the pressure cylinder 12. Is supplied to raise the ram 13. Then, the material P to be processed on the hot plate 15 is brought into contact with the lower surface of the hot plate 17, and the oil chamber 18 of the pressure cylinder 12 is further boosted to perform pressure molding. Further, before and after these, the temperature rise control of the hot plates 15 and 17 is performed. At this time, as shown in FIG. 3, the portion where the tie bar 21 of the upper plate 16 is fixed by the pressing force of the pressure cylinder 12 receives a reaction force and is pulled downward, and the upper plate 16 has a lower center surface thereof. It is curved in a concave shape. On the contrary, with respect to the base portion 20, the portion to which the tie bar 21 is fixed is pulled upward, and the central side is curved in a concave shape. Then, the tie bar 21 is stretched and a pressing force is generated.

However, in the present invention, even if the upper plate 16 is curved, the spacer member 25 having a height h larger than the thickness of the upper plate 16 is fixed to the lower surface of the upper plate 16, so that the curvature of the spacer member 25 is extremely high. Will be small. As a result, the hot plate 17 which is the upper pressurizing member fixed to the upper plate 16 via the spacer member 25 is hardly curved. Further, the curvature of the base portion 20 does not affect the movable platen 14, and the movable platen 14 and the hot plate 15 fixed to the movable platen 14 are not curved. At this time, the work material P placed on the hot plate 15 is arranged in a portion where the cross sections of both the ram 13 and the spacer member 25 are projected when viewed from above. Therefore, the material P to be molded is pressed by the ram 13 to apply a pressing force from the flat hot plate 15 and a reaction force from the flat hot plate 17 via the spacer member 25. , Is evenly pressurized between both hot plates 15 and 17. As a result, the work material P having excellent parallelism can be pressure-molded.

Next, another embodiment will be described. The press device of the present invention may be provided with a plurality of intermediate hot plates as in Patent Documents 1 to 3 between the hot plate attached to the movable platen and the hot plate attached to the upper plate. Even when the present invention is adopted for a press device provided with three or more hot plates, the parallelism between the intermediate hot plates can be improved because the value is equal to or less than the strength of the movable plate and the spacer.

Further, the press device 11 of the present invention has been designed from the beginning on the premise that the spacer member 25 is attached. However, the spacer member having a predetermined height can exhibit the effect that the warp of the upper plate does not reach the material to be processed even when it is attached to the upper plate of the existing pressing device. However, when mounting the spacer member on the existing press device, it may be necessary to take measures such as removing the uppermost intermediate hot plate. Further, when the spacer member is attached to the existing press device, the effect of thinning the upper plate of the press device cannot be expected.

Furthermore, the press device 11 may also be provided with a spacer member having a predetermined height as provided on the side of the upper plate 16 between the movable plate 14 and the hot plate 15 which is a lower pressurizing member. .. As described above, the movable platen 14 does not bend during pressure forming, but effects such as bringing the pressure conditions (including reaction force) from the upper and lower hot plates 15 and 17 closer can be expected. Further, when the spacer member can be expected to have a heat insulating effect, it also has an effect of preventing heat conduction from the hot plate 15 to the movable plate 14.

Furthermore, the upper pressurizing member and the lower pressurizing member of the press device 11 may be provided with a cavity surface. In that case, when projected from above, it is desirable that at least the cavity surface portion is within the cross section of the ram 13 and the spacer member 25, and the upper pressurizing member and the lower pressurizing member as a whole are the ram 13 and the spacer member. It is even more desirable to be within the range of 25 said cross sections. When the upper pressurizing member and the lower pressurizing member are provided with the cavity surface, either the upper pressurizing member or the lower pressurizing member, or the spacer member may be provided with a projecting mechanism. The spacer member includes a block body other than a completely solid block body for the purpose of providing the protrusion mechanism on the spacer member and the purpose of providing the cooling mechanism on the spacer member.

The press device 11 of the present embodiment controls pressure by a pressure cylinder 12, but it can be used as a press device in which a position sensor is attached and pressure molding is performed by elements of position control and speed control, and an element of pressure control. It may be a press device that performs pressure molding in addition to the elements of position control and speed control.

Although the present invention is not listed one by one, it is not limited to those of the above-described embodiments, but those modified by those skilled in the art based on the gist of the present invention and those in which the above-described embodiments are combined. Needless to say, it applies.

11 Press device 12 Pressurizing cylinder 13 Ram 14 Movable plate 15 Hot plate (lower pressurizing member)
17 Hot plate (upper pressurizing member)
16 Upper board 25 Spacer member h Height (height of spacer member)
P Work material

Claims (4)

In a press device in which a lower pressurizing member provided on the movable platen side is raised by a ram of a pressurizing cylinder and a work material is pressed between the lower pressurizing member and the upper pressurizing member provided on the upper plate side.
A press device characterized in that a spacer member having a predetermined height that indirectly applies a reaction force to a work material is attached between the upper plate and the upper pressurizing member so as to face the ram. In a press device in which a lower pressurizing member provided on the movable platen side is raised by a ram of a pressurizing cylinder and a work material is pressed between the lower pressurizing member and the upper pressurizing member provided on the upper plate side.
Between the upper plate and the upper pressurizing member, a spacer member having a horizontal cross section of 95% to 110% and a predetermined height with respect to the horizontal cross section of the ram facing the ram is provided. A press device characterized by being installed. The press device according to claim 1 or 2, wherein the height of the spacer member is larger than the thickness of the upper plate. In a molding method of a press device in which a lower pressurizing member provided on the movable platen side is raised by a ram of a pressurizing cylinder and a work material is pressed between the lower pressurizing member and the upper pressurizing member provided on the upper plate side. ,
A spacer member having a predetermined height that indirectly applies a reaction force to the work material facing the ram is attached between the upper plate and the upper pressurizing member.
A method for forming a press device, wherein the material to be processed is arranged in a projected portion of both a ram and a spacer member of the upper pressurizing member, and is pressurized by the ram.