JP6377597B2 - Die plate and mold clamping device - Google Patents

Description

  The present invention relates to a die plate suitable for use in an injection molding machine.

A fixed die plate for holding a fixed die, a movable die plate for holding a movable die, a moving means for moving the movable die plate forward and backward with respect to the fixed die plate, and a movable die plate and a fixed die plate with a tie bar. There is a mold clamping device of an injection molding machine provided with a mold clamping means for coupling and pressing through the mold clamping device.
There is an increasing demand for molding larger products with injection molding machines, and it is necessary to make the molding machine larger in order to mold larger products. Furthermore, in large molding machines, molds are attached. The die plate is very large and heavy. For example, in the case of an injection molding machine having a clamping force of 4000 ton class, the width of the die plate exceeds 4 m and the weight ranges from about 45 to 50 tons. Therefore, when the width of the road for transportation leading to the factory where the molding machine is installed is narrow, or the ground of the road is weak and the earth strength is low, the die plate may not be transported to the factory.

Patent Document 1 proposes a mold clamping device that can cope with a large injection molding machine, improve the transportability and handling of the die plate, and can securely fasten the fixed mold and the movable mold. . As shown in FIG. 13, the mold clamping device of Patent Document 1 has a movable die plate that can be separated into an upper board 102 and a lower board 103, and can be attached to and detached from one surface side of the force board 101. And a mold support 105 to which a movable mold is attached. Patent Document 1 divides the die plate into two members, a force receiving plate 101 and a mold support 105, and further divides the force receiving plate 101 into two members, an upper plate 102 and a lower plate 103, Since it is divided into three members, the weight of each member can be kept light. Thereby, patent document 1 is aiming at the improvement of the conveyance property of a die plate, and handleability.
In addition, the clamping apparatus to the three members by patent document 1 can also be applied to a fixed die and a fixed die plate.

Japanese Patent No. 3886670

  In the mold clamping device of Patent Document 1, a force receiving plate 101 in which an upper plate 102 and a lower plate 103 are joined is assembled to a mold support 105 as indicated by broken arrows. When the mold is clamped, the force receiving plate 101 is bent, and this bending generates a force that peels and breaks the bonding interface between the upper plate 102 and the lower plate 103. In order to avoid this breakage, in order to increase the bonding strength between the upper board 102 and the lower board 103, it is necessary to take measures such as increasing the thickness around the bonded portion or increasing the area of the bonding interface. Therefore, although the weight of each of the upper board 102 and the lower board 103 can be reduced as compared with a single die plate, the weight of the upper board 102 and the lower board 103 is considerably heavier than that obtained by simply dividing the die plate vertically. A die plate constructed by assembling the board 103 and the mold support 105 is greatly increased in cost compared to the original die plate.

  In view of the above, an object of the present invention is to provide a die plate that is excellent in transportability, handleability, and cost while ensuring strength against bending due to mold clamping.

The present invention relates to a die plate for a mold clamping device in which a fixed mold or a movable mold is attached and a clamping force is generated together with a mating die plate to generate a clamping force between the fixed mold and the movable mold. About.
The die plate of the present invention includes a force receiving body that receives a fastening force, and a mold support that is attached to one side of the force receiving body and to which a fixed mold or a movable mold is attached.
The force receiving body of the present invention includes a cross rib module having a force receiving portion that receives a fastening force at both ends in the axial direction in which the rib extends , and a pair of cross rib modules that can be combined with each other separately or directly. It is characterized by being assembled so as to cross each other through the intermediate member.

Since the force receiving body in the present invention is a pair of cross rib modules assembled so as to cross each other, the pair of cross rib modules can be separately transported to a place where the injection molding machine is installed. it can. Since the separated pair of cross rib modules are lighter than the entire force receiving body, they are excellent in transportability and handling. In particular, each of the pair of cross rib modules has a large axial dimension connecting the force receiving portions at both ends, but a dimension in a direction orthogonal to the axial direction is smaller than the axial direction. Even assuming a die plate of a 4000 ton class injection molding machine, the dimension in the direction orthogonal to the axial direction can be 4 m or less. Moreover, since the length of each cross rib module can be 10 m or less, it can be transported without difficulty by a large truck.
Moreover, the force receiving body in the present invention is assembled by crossing cross rib modules having force receiving portions at both ends in the axial direction. Therefore, when a clamping force is generated in the mold clamping device using the die plate of the present invention, for example, each of the pair of cross rib modules connected along the diagonal line functions as a beam and faces bending, so that the bending moment It is possible to design a module that is strong and compact. At this time, the cross rib modules may be connected so as to be separable, or may be connected so that they cannot be separated by welding or adhesive bonding. In particular, if it can be connected in a separable manner, it can be disassembled and shipped after it is temporarily assembled and confirmed to be normal in the connected state, assembly accuracy, and mold clamping function at the mold clamping device manufacturing plant. It is effective to ensure the quality and reliability of the panel. Preferably, it can be assembled by either coupling method, separable or non-separable, and functions as a mold clamping device that fastens the fixed mold and the movable mold, regardless of the coupling system. It is preferable that the connection structure be able to.
Further, when the pair of cross rib modules are assembled to cross each other, the connecting portion can be assembled directly or via an intermediate member such as a spacer. In particular, when assembled via an intermediate member such as a spacer, when a clamping force is generated in the mold clamping device using the die plate of the present invention, and the mutual displacement occurs in the connecting portion due to deformation of the cross rib module, By sliding the seat at the connecting part, it is possible to release distortion and excessive surface pressure and prevent problems such as unnecessary adhesive wear. For this reason, it is preferable to perform a surface treatment for forming a highly slidable film on the surface of the spacer by plating or vapor deposition.

In the die plate of the present invention, a cylinder for a hydraulic cylinder that applies a fastening force to the force receiving portion of the cross rib module can be formed.
If the cylinder, which is an element of the hydraulic cylinder, is formed on the die plate in this way, it is not necessary to separately provide the element, so that the mold clamping device can be made compact and the assembling work can be saved.
Similarly, an electric actuator element for applying a fastening force can be provided in the force receiving portion of the cross rib module.

In the die plate of the present invention, when each of the pair of cross rib modules is provided with a central connecting portion in the axial central portion in which the ribs to be overlapped with each other extend , the central connecting portion is recessed from the other portions. Can do. By superimposing the depressed central connection portions, the thickness of the die plate can be reduced.

In the die plate of the present invention, the force receiving body and the mold support can be separable. This means that the three elements of the pair of cross rib modules and the mold support are individually manufactured, and the weight of each element can be reduced.
In the die plate of the present invention, one of the pair of cross rib modules and the mold support can be integrally formed. Since the mold support is lighter in weight than the cross rib module, an increase in weight can be suppressed even if the mold support is integrally formed with one of the pair of cross rib modules. On the other hand, according to this integral molding, in addition to the time for molding, the labor for assembling one of the pair of cross rib modules and the mold support can be saved.

In the die plate of the present invention, the mold support is on one surface side attached to the force receiving body, and is in a region avoiding the pair of cross rib modules. Ribs can be provided.
As a result, the rigidity of the entire die plate combined with the mold support can be improved to resist bending. In addition, since the rib is provided on the one surface side attached to the force receiving body and in a region where the pair of cross rib modules are avoided, it is not necessary to prepare a special region for providing the rib.

  The present invention has a fixed die plate to which a fixed die is attached, and a movable die plate to which the movable die can be attached while being movable forward and backward with respect to the fixed die plate. A clamping device is provided for clamping the movable mold and the stationary mold by applying a fastening force to the mold. The mold clamping apparatus is configured such that at least one of the fixed die plate and the movable die plate is formed from the die plate described above. Composed.

  According to the present invention, since a pair of cross rib modules that can be combined with each other are assembled so as to intersect each other, the transportability, handling property, and cost are excellent. Further, according to the present invention, since the force receiving body, for example, each of a pair of cross rib modules connected along a diagonal line functions like a beam and resists bending, a compact module design becomes possible.

It is a fragmentary sectional side view which shows the mold clamping apparatus in embodiment of this invention. It is a perspective view which shows the die plate used for the mold clamping apparatus of FIG. It is a disassembled perspective view which shows the die plate of FIG. It is a figure which shows the modification of a cross rib module and a metal mold | die support body. It is a figure which shows the modification of a cross rib module and a metal mold | die support body. It is a figure which shows the modification of a cross rib module and a metal mold | die support body. It is a figure which shows the modification of a cross rib module and a metal mold | die support body. It is a figure which shows the modification of a cross rib module and a metal mold | die support body. It is a figure which shows the modification of a cross rib module and a metal mold | die support body. It is a figure which shows the modification of a cross rib module and a metal mold | die support body. It is a top view which shows other embodiment of the die plate by this invention. It is the schematic which looked at the mold clamping apparatus of FIG. 1 from the fixed die plate side. It is a perspective view which shows the conventional fixed die plate.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, the mold clamping device 1 according to the present embodiment has a rail fixed by an operation of a fixed die plate 5 fixed on a base frame 2 and a fixed mold 3 attached thereto, and a moving cylinder 13. 7 includes a movable die plate 11 that moves forward and backward in the left-right direction in the figure and has a movable die 9 attached thereto, and a plurality of tie bars 15 that connect the fixed die plate 5 and the movable die plate 11.
For convenience of explanation, the side on which the fixed die plate 5 is provided is defined as the front, and the side on which the movable die plate 11 is provided is defined as the rear.

  The fixed die plate 5 is provided with a hydraulic cylinder 17 for clamping a die comprising a cylinder 37 and a ram 19 coaxially with each tie bar 15, and one end of each tie bar 15 is connected to the ram 19 of the hydraulic cylinder 17. Yes. A male screw 21 is formed at the other end of each tie bar 15, and the male screw 21 meshes with a half nut 23 provided on the movable die plate 11.

The fixed die plate 5 is, as shown in FIGS. 1 to 3, a force receiving body 30 in which cylinders 37 are formed at four corners, and is detachably attached to one surface side of the force receiving body 30. And a mold support 40 to which 3 is attached. The force receiving body 30 and the mold support 40 are fastened by bolts not shown. A receiving hole 33 for receiving the tip of the injection unit (not shown) is formed in the center of the force receiving body 30, and the molten resin injected from the injection unit is in the center of the mold support 40. Is formed in the cavity of the fixed mold 3. Note that the fixed mold 3 may be attached to the mold support 40 by bolting or the like.
Here, the fixed die plate 5 is described as an example, but the movable die plate 11 can be configured in the same manner as the fixed die plate 5.

As shown in FIGS. 2 and 3, the force receiving body 30 is manufactured by assembling two cross rib modules 31 in a cross shape.
Each cross rib module 31 includes a central coupling portion 32, a pair of ribs 34 and 34 each having one end 34 </ b> A connected to the outer peripheral surface of the central coupling portion 32 and extending in the radial direction, and each of the ribs 34 and 34. Clamping cylinders 37, 37 connected to the end 34B. In the cross rib module 31, the central connecting portion 32, the pair of ribs 34 and 34, and the pair of cylinders 37 and 37 are arranged in a straight line. The cross rib module 31 is preferably manufactured integrally by casting, but may be manufactured by joining individually manufactured elements by welding, for example.

The central connecting portion 32 has a cylindrical shape, and the hollow portion constitutes an accommodation hole 33 for accommodating the distal end portion of the injection unit. Here, the central connecting portion 32 has a cylindrical shape, but the form thereof is arbitrary as long as it has a function of supporting the ribs 34 and 34 and a function of accommodating the tip of the injection unit. It may be a rectangular tube shape or a cone tube shape.
Each rib 34 has a flat plate shape, but one end 34 </ b> A provided for connection to the central coupling portion 32 is tapered such that the height (H) decreases toward the central coupling portion 32. It is made into a shape. Thereby, stress concentration is eased. Note that the tapered portion has the same effect as the R shape. The portion excluding one end portion 34A including the other end portion 34B has a constant height (H) including the other end portion 34B, and the central coupling portion 32 is displaced to one side in the height direction H. A thin wall 35 is formed. The thickness (T) of the rib 34 is constant.
Each cylinder 37 has a cylindrical shape, and the hollow portion constitutes an oil chamber 38 of the hydraulic cylinder 17. Each cylinder 37 is formed with a through hole 39 (see FIG. 1) for allowing the tie bar 15 to pass therethrough.

The cross rib modules 31, 31 having the above configuration are assembled so that the central coupling portions 32, 32 are coaxial, and the ribs 34, 34 intersect each other. , 31 are cross-shaped. As a result, the intersecting angle of the ribs 34 and 34 can be set to an orthogonal or arbitrary angle. Therefore, a horizontally long mold necessary for mounting a horizontally long mold such as a bumper of an automobile is used. The fastening device can be easily configured by simply assembling the cross rib module 31 at a reduced angle. In this case, a horizontally long mold (fixed mold 3) that does not fit in the area surrounded by the hydraulic cylinders 17 provided at the four corners of the substantially square mold plate as shown in FIG. 12 (a). However, as shown in FIG. 12 (b), the entire area of the mold (fixed mold 3) can be stored in an area surrounded by the hydraulic cylinder 17. Then, the generation of burrs can be suppressed by applying a clamping force to the entire area of the mold, and it becomes unnecessary to design a new horizontally long mold mounting board. In addition, since the cross rib modules 31 and 31 are assembled so that the recesses 35 and 35 of the ribs 34 and 34 are overlapped with each other, the force receiving body 30 is used to overlap the ribs 34 and 34 other than the recesses 35 and 35. In comparison, the height (H) can be suppressed. In addition, the ribs 34 and 34 that intersect each other are in contact with and supported by the mold support 40, so that the mold support 40 can be backed up. In addition, the height (H) of the rib 34 that governs the bending rigidity of the cross rib module 31 remains the same in each cross rib module 31, that is, without causing a bias in the rib structure of the fixed die plate 5. The central connecting portion 32 that connects the ribs 34 in the axial direction in which the ribs 34 extend can be overlapped. As a result, the rigidity of the fixed die plate 5 can be increased without deviation. At this time, if a clamping force is generated in the mold clamping device 1 via a spacer between the mold support 40 and the rib 34, the deformation of the cross rib module 31 causes a deformation between the mold support 40 and the rib 34. It is preferable to be able to release distortion due to misalignment and excessive surface pressure when misalignment occurs.

Next, as shown in FIG. 1 and FIG. 2, the mold support 40 includes a substantially rectangular support body 41, cutouts 43 that accommodate cylinders 37 provided at the four corners of the support body 41, and a support body. Four supports that are formed at the center of the main body 41 and are erected on the periphery between the through holes 45 that lead the molten resin into the cavity of the stationary mold 3 and the adjacent cutouts 43, 43 of the support body 41. Body ribs 47. For example, the mold support 40 may be produced by casting alone, or may be produced by casting integrally with one of the cross rib modules 31, as shown in FIG.
The support body 41 includes a front surface (not shown) and a back surface 44 on which four support ribs 47 are erected. The back surface 44 is surrounded by four support ribs 47. A force receiving member accommodating portion 48 which is a space is provided. The support ribs 47 are only elements that are preferably provided in the present embodiment, and the support ribs 47 may be omitted in the present invention. Conversely, as shown in FIG. 11, the support ribs 47 can be formed in various forms.

  The method of assembling the force receiving body 30 and the mold support 40 is arbitrary, and the pair of cross rib modules 31 and 31 and the mold support 40 can be individually manufactured and assembled in the form shown in FIG. In addition, the pair of cross rib modules 31 and 31 can be integrally manufactured by casting and assembled with the mold support 40 manufactured individually. Alternatively, one cross rib module 31 and the mold support 40 may be integrally manufactured by casting, and the other cross rib module 31 separately manufactured may be assembled to the integrally molded product. Each element is preferably fastened by a bolt at the central connecting portion 32 with a small deformation amount. At this time, in a state in which the mold clamping force is not loaded, it is assembled so as to provide a gap between the rib 34 and the mold support 40, and the cross rib module 31 is bent and deformed when the mold clamping force is loaded. The gap may disappear and the ribs 34 may be backed up by the mold support 40. In this case, the main load of the mold clamping force generated by the hydraulic cylinder 17 is filled with the central portion of the mold, that is, with the resin via the central coupling portion 32 that is in contact with the central portion of the mold support 40, and the fixed mold. Since the resin pressure for opening the movable mold 9 is transmitted from the mold 3 to the loaded cavity, the mold clamping force can be efficiently transmitted to the fixed mold 3 and the movable mold 9.

  Here, although detailed description of the movable die plate 11 is omitted, the movable die plate 11 can be composed of a power receiving body and a mold support body to which the movable mold 9 is attached in the same manner as the fixed die plate 5, and other configurations are adopted. You can also.

The mold clamping apparatus 1 of the present embodiment having the above configuration operates as follows.
First, the movable die plate 11 is moved to the mold closing position shown in FIG. 1 by operating the moving cylinder 13, and each tie bar 15 is passed through the through-hole 39 formed in the cylinder 37 of the movable die plate 11. The movable mold 9 is brought into contact with the fixed mold 3. Next, the male screw 21 and the half nut 23 of each tie bar 15 are engaged with each other, and the movable die plate 11 is fixed to the tie bar 15. Then, the pressure of the hydraulic oil in the oil chamber 38 of each hydraulic cylinder 17 is increased, and the tie bar 15 is moved forward. As a result, the movable die plate 11 moves toward the fixed die plate 5, so that a clamping force is generated between the fixed mold 3 and the movable mold 9.

  At this time, a tensile load is applied to each tie bar 15, and the fixed die plate 5 receives a fastening force together with the movable die plate 11 that is the counterpart die plate. However, since the fixed die plate 5 and the movable die plate 11 have a fixed die 3 and a movable die 9 between them, the fixed die plate 5 has a central portion as shown by a broken line in FIG. Bends to project forward.

Next, the effect by the mold clamping apparatus 1 of this embodiment is demonstrated.
Since the fixed die plate 5 according to the present embodiment is assembled so as to cross two cross rib modules 31 that can be combined with each other separately, the two cross rib modules are installed up to the place where the injection molding machine is installed. Can be transported separately in a separated state. Since the two separated cross rib modules are lighter than the entire force receiving body 30, they are excellent in transportability and handling. In particular, the two cross rib modules 31 have a large dimension in the axial direction connecting the force receiving bodies 30 at both ends, but a dimension in a direction orthogonal to the axial direction is smaller than that in the axial direction. Even if the target is a 4000 ton class injection molding machine, the dimension in the direction orthogonal to the axial direction can be 4 m or less. Moreover, since the length of the two cross rib modules 31 can be 10 m or less, it can be transported without difficulty by a large truck.
In addition, the force receiving body 30 in the present embodiment is assembled by crossing a pair of cross rib modules 31 each having a cylinder 37 that is a force receiving portion at both ends in the axial direction. Accordingly, when a fastening force is generated in the mold clamping device 1 using the fixed die plate 5, each of the cross rib modules 31 connected along the diagonal line functions like a beam and faces bending, so that it is resistant to bending moment. In addition, a compact module design is possible.

  In addition, the force receiving body 30 of the present embodiment has a cylinder 37 formed in the cross rib module 31 so that the force receiving body 30 has the function of a hydraulic cylinder. The apparatus 1 can be made compact, and the trouble of assembling the apparatus 1 can be saved.

  Moreover, the force receiving body 30 of this embodiment is provided with the center connection part 32 in the center part of the axial direction where each of the cross rib module 31 is piled up mutually. The central connecting portion 32 is formed as a hollow 35 that is thinner than the ribs 34 and the cylinders 37 that are other parts. The hollow 35 is displaced in one direction in the thickness direction, and is received by overlapping the hollows 35 with each other. The thickness of the force body 30, and consequently the thickness of the fixed die plate 5, can be reduced.

  In addition, since the fixed die plate 5 is made of the three elements of the two cross rib modules 31 and the mold support 40 individually, the weight of each element can be reduced. Therefore, according to the embodiment in which the fixed die plate 5 can be separated into three elements, the transportability and the handleability are the best.

  The mold support 40 according to the present embodiment is bent in the out-of-plane direction on the back surface 44 side, which is one surface side attached to the force receiving body 30, in a region avoiding the pair of cross rib modules 31. Therefore, the rigidity of the fixed die plate 5 combined with the mold support 40 is improved, and it is possible to resist bending. In addition, since the support rib 47 is provided in an area where the cross rib module 31 is avoided, it is not necessary to prepare a special area for providing the support rib 47.

  In addition to the above, as long as the gist of the present invention is not deviated, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

For example, as shown in FIG. 5, the height (H) of the ribs 34, 34 of one (upper side in the figure) of the cross rib module 31 is reduced as a whole, and the thinned portion is used as the mold support 40. It can be provided as support ribs 49, 49. The cross rib module 31 is joined by superimposing thinned ribs 34 and 34 with reduced height (H) on support ribs 49 and 49. In particular, it is effective when the mold support 40 requires high rigidity, and is effective in preventing stress concentration at the connecting portion between the central connecting portion 32 and the rib 34.
In this case, the connecting portion between the ribs 34 and 34 and the cylinders 37 and 37 has a tapered shape in which the height (H) increases toward the cylinders 37 and 37 as shown in FIG. Or it can be R-shaped. In this case, the support ribs 49, 49 of the mold support 40 are shaped to follow the tapered shape of the ribs 34, 34.
Also in these cases, a gap may be provided between the opposed surfaces of the ribs 34 and 34 and the support rib 49 or may be brought into contact with each other via a spacer.

Further, according to the present invention, as shown in FIG. 7, the diameters of the cross rib modules 31, 31 can be set so that one central coupling portion 32 is fitted inside the other central coupling portion 32. it can. Thus, the relative positioning of the cross rib modules 31 and 31 can be facilitated by fitting the central coupling portions 32 and 32 into an inlay structure. In addition, in order to match the dimension in the height direction, the height of the central connecting portion 32 having a reduced diameter is increased, and the height of the central connecting portion 32 having an increased diameter is decreased.
Also in the case of adopting this inlay structure, as shown in FIG. 8, the height (H) of the ribs 34, 34 is reduced and the thinned portions are provided as the support ribs 49, 49 on the mold support 40. One cross rib module 31 may be integrally formed with the mold support 40 by casting.
Further, even when this inlay structure is adopted, as shown in FIG. 9, it can be formed into a tapered shape in which the height (H) increases toward the cylinders 37, 37 or can be formed in an R shape. In this case, the support ribs 49, 49 of the mold support 40 are shaped to follow the tapered shape of the ribs 34, 34. Also in this case, the inner diameter of the central coupling part 32 whose diameter is increased to release the displacement due to the deformation of the central coupling part 32 when the clamping force is generated in the mold clamping device, and the central whose diameter is decreased. A fitting member such as a bush (not shown) may be inserted between the outer diameters of the connecting portions 32.

  Further, according to the present invention, as shown in FIG. 10, the ribs 39 and 36 orthogonal to the ribs 34 and 34 are formed to extend from the central coupling portion 32, whereby the cross rib modules 31 and 31 are configured in a cross shape. Can do. If it does so, each of the cross rib modules 31 and 31 becomes effective in prevention of the stress concentration of the connection part of the center connection part 32 and the rib 34 while becoming strong in a bending moment with respect to the direction which cross | intersects.

  In the above embodiment, the three elements of the two cross rib modules 31 and the mold support 40 are individually manufactured and assembled, but one of the two cross rib modules 31 and the mold support 40 are integrated. Can be formed. Since the mold support 40 is lighter in weight than the cross rib module 31, an increase in weight can be suppressed even if one of the cross rib modules 31 and the mold support 40 are integrally formed. On the other hand, if one of the cross rib modules 31 and the mold support 40 are integrally formed, it is possible to save the time and effort of forming each of the cross rib modules 31 as compared to forming each of them by, for example, casting. In addition, the trouble of assembling one of the cross rib modules 31 and the mold support 40 can be saved.

Further, the cross rib module 31 of the present embodiment includes the cylinders 37 and 37 at both ends in the axial direction, but the present invention is not limited to this, and the boss through which the tie bar 15 passes is simply provided without providing the cylinders 37 and 37. It is also possible to provide this boss as the force receiving portion of the present invention. In this case, it is necessary to provide a cylinder separately.
Alternatively, as a means for applying a fastening force between the fixed die plate 5 and the movable die plate 11, an electric motor as an electric actuator can be used in addition to the hydraulic cylinder 17, so that elements involved in driving the electric motor are It can also be provided at both ends of the cross rib module 31 in the axial direction. For example, an actuator that can convert the rotational motion of an electric motor into linear motion corresponds to this. Specifically, a ball screw shaft can be formed on the tie bar 15, and ball screw nuts that can be rotated by an electric motor drive can be provided at both ends of the cross rib module 31 in the axial direction. Alternatively, a known toggle type mold clamping device that is driven by a ball screw can be provided, and a fastening force can be applied by pulling the tie bar 15. Thereby, it is possible to load the mold clamping force to the mold with high efficiency while suppressing energy loss.
Only mechanical elements such as a mechanism capable of converting the rotational motion into a linear motion and a toggle mechanism can be provided at both ends of the cross rib module 31 in the axial direction, and an electric motor can also be provided. .

1 Clamping device 2 Base frame 3 Fixed mold 5 Fixed die plate 7 Rail 9 Movable mold 11 Movable die plate 13 Moving cylinder 15 Tie bar 17 Hydraulic cylinder 19 Ram 21 Male screw 23 Nut 30 Power receiving body 31 Cross rib module 32 Center Connecting portion 33 Accommodating hole 34 Rib 34A One end 34B Other end 35 Recess 36 Rib 37 Cylinder 38 Oil chamber 39 Through hole 40 Mold support 41 Support body 43 Notch 44 Back surface 45 Through hole 47 Support rib 48 Receiving Force body accommodating portion 49 Support rib 101 Power receiving panel 102 Upper panel 103 Lower panel 105 Mold support

Claims (8)

A die plate of a mold clamping device that generates a clamping force between the fixed die and the movable die by receiving a fastening force together with a mating die plate to which a fixed die or a movable die is attached. And
The die plate is
A power receiving body that receives the fastening force;
A mold support attached to one side of the force receiving body and to which the fixed mold or the movable mold is attached,
The power receiving body is
It has a pair of cross rib modules that can be combined with each other separately, having force receiving portions that receive the fastening force at both ends in the axial direction in which the ribs extend .
A pair of the cross rib modules can be assembled to cross each other.
A die plate characterized by that. The force receiving portion of the cross rib module includes a hydraulic cylinder for applying the fastening force.
The die plate according to claim 1. The force receiving portion of the cross rib module includes an element of an electric actuator that applies the fastening force.
The die plate according to claim 1. Each of the pair of cross rib modules includes a central coupling portion at a central portion in the axial direction in which the ribs overlapped with each other extend .
The central connecting part is depressed more than other parts,
The die plate as described in any one of Claims 1-3. The force receiving body and the mold support are separable,
The die plate as described in any one of Claims 1-4. One of the pair of cross rib modules and the mold support are integrally formed,
The die plate as described in any one of Claims 1-4. The mold support is
A said one side attached to the force receiving member, a region except a pair of the cross ribs module comprises one or more of the ribs to restrict bending of the out-of-plane direction,
The die plate according to any one of claims 1 to 6. A fixed die plate to which a fixed die is attached, and a movable die plate to which a movable die is attached while being movable forward and backward to the fixed die plate,
A mold clamping device for clamping the movable mold and the fixed mold by applying a fastening force between the movable die plate and the fixed die plate,
At least one of the fixed die plate and the movable die plate is composed of the die plate according to any one of claims 1 to 7.
A mold clamping device characterized by that.

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