JP2003290993A - Metal mold clamping device for powder molding press machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce installation costs by performing clamping/declamping of metal molds by mechanical structures. <P>SOLUTION: In a metal mold clamping device prepared for a powder molding press machine and capable of clamping metal molds 43, 48, 50 on respective supporting plates 2, 14, 20 by respective clampers 28, screw clampers 39 for holding the metal molds 43, 48, 50 at clamped states or releasing the metal molds 43, 48, 50 from the clamped states are arranged between respective supporting plates 2, 14, 20 and respective clampers 28. The screw clampers 39 are constituted of male screw parts 9, 15, 21 arranged on the sides of respective supporting plates 2, 14, 20 and female screw parts 40 engaged with the male screw parts 9, 15, 21 and partially abutted on the clampers 28. The metal molds 43, 48, 50 are held at the clamped states or released from the clamped states by adjusting the engaged positions of the female screw parts 40 with the male screw parts 9, 15, 21. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die clamping device for a powder molding press, and more particularly to a die clamping device for a powder molding press for fastening or releasing a die to a support plate. is there.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a die clamping device for a powder molding press of this type. This mold clamping device 62
Clamps or releases the die 72, the upper punch 73, and the lower punch 74, which are molds, to the die plate 63, the upper punch plate 66, and the lower punch plate 67 of the die set portion 69 of the powder molding press. It is applied to do.

The die set section 62 is a die plate 6
3, an upper guide rod 64 erected on the upper part of the die plate 63, a lower guide rod 65 hung vertically on the lower part of the die plate 63, and attached to the upper guide rod 64 with respect to the upper guide rod 64. An upper punch plate 66 that can move up and down relatively, a lower punch plate 67 that is attached to the lower guide rod 65 and can move up and down relatively to the lower guide rod 65, and are provided at the lower end of the lower guide rod 65. And a pull-down plate 68 that is installed.

A die 72, an upper punch 73, and a lower punch 74, which are molds, are formed on the central portion of the die plate 63, the lower surface side of the upper punch plate 66, and the upper surface side of the lower punch plate 67 by a mold clamping device 62, respectively. Can be attached.

The die clamp device 62 includes a die 72, an upper punch 73, and a lower punch 74, respectively, on the plate 63,
The clamp ring 70 that presses in the directions of 66 and 67 and the clamp ring 70 are respectively attached to the plates 63, 66 and 67
And a plurality of bolts 71 connected to the plate 71. By tightening the plurality of bolts 71, the die 72, the upper punch 73, and the lower punch 74 are connected to the plates 63, 66, 6 respectively.
7 and the bolts 71 are loosened to release the tightened state.

[0006]

However, in the mold clamping device 69 having the above-described structure, the die 7 which is a mold by tightening a plurality of bolts 71.
2, upper punch 73, and lower punch 74 to each plate 6
Since the fastening state is released by fastening the bolts 3, 66, 67 and loosening the plurality of bolts 71, the plates 63, 66 of the die 72, the upper punch 66, and the lower punch 67, which are molds, are released. It takes a lot of time and effort to fasten and unfasten the fasteners 67 and 67, resulting in a significant decrease in production efficiency.

On the other hand, in order to solve the above-mentioned problems, although not shown in the drawing, the die, the upper punch and the lower punch are fastened to the respective plates by pressing the clamp ring toward the respective plates by the disc spring, There is provided a mold clamping device configured to release the fastening state of each plate by pressing the clamp ring in a direction opposite to each plate by hydraulic pressure.

However, in the mold clamping device having such a structure, since the hydraulic system is required, the structure becomes complicated and the equipment cost becomes high. Further, when oil leaks due to a failure of the hydraulic system, there is a possibility that the surrounding environment will be polluted.

The present invention has been made in view of the above-mentioned conventional problems, and is for fastening a die to a support plate,
It is very easy to release the fastening state, the production efficiency can be greatly increased, the equipment cost can be kept low, and the surrounding environment is not polluted due to oil leakage etc. An object of the present invention is to provide a mold clamping device for a machine.

[0010]

In order to solve the above problems, the present invention employs the following means. That is,
According to a first aspect of the present invention, in a mold clamping device of a powder molding press for fastening a mold to a support plate with a fastening body, the mold is held in a fastened state between the support plate and the fastening body. Or a screw fastening body for releasing the mold from the fastening state is provided. According to the die clamp device of the powder molding press machine according to the present invention,
The screw fastening body provided between the support plate and the fastening body holds the die in the fastening state or releases the die from the fastening state.

According to a second aspect of the present invention, in the mold clamping device of the powder molding press according to the first aspect, the screw fastening body has one screw portion provided on the support plate side and the one screw. It is characterized in that it is screwed with each other and a part of the other screw part comes into contact with a part of the fastening body. According to the die clamping device of the powder molding press machine of the present invention, one screw portion provided on the support plate side and the other screw portion provided on the fastening body side are screwed with each other, and the other screw portion is provided. Is abutted on a part of the fastening body. Then, by adjusting the screwing positions of both screw portions, the mold is held in the fastening state, or the mold is released from the fastening state.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention shown in the drawings will be described below. 1 to 4 show an embodiment of a mold clamping device of a powder molding press according to the present invention, and FIG. 1 is a schematic view showing the entire die set portion of the powder molding press, 2, 3 and 4 are partially enlarged views of FIG.

As shown in FIG. 1, the die set portion 1 is attached to the press body portion 55 of the powder molding press machine, and is provided upright on the die plate 2 which is a support plate and the upper portion of the die plate 2. The upper guide rod 11 to be
A lower guide rod 12 that is vertically provided under the die plate 2.
And an upper punch plate 14 which is a support plate which is attached to the upper guide rod 11 via a guide metal 13 and which is vertically movable relative to the upper guide rod 11, and a guide metal 13 on the lower guide rod 12. The lower punch plate 20 is a support plate that is attached via the lower guide rod 12 and is vertically movable relative to the lower guide rod 12, and a pull-down plate 25 that is integrally connected to the lower end portion of the lower guide rod 12. There is.

The die set section 1 includes a lower punch plate 20.
Is fixed to the press body 55 with bolts or the like (not shown), so that it can be integrally attached to the press body 55. Therefore, in the die set unit 1, with the lower punch plate 20 fixed to the press body 55, the die plate 2 and the pulling down plate 25 with respect to the lower punch plate 20 via the lower guide rod 12 and the guide metal 13. It is possible to move up and down relatively.

A T-shaped groove portion 19 is provided on the upper punch plate 14, and the press main body portion 5 is provided in the groove portion 19.
5, a T-shaped joint of the upper ram (not shown) is fitted. Therefore, when the upper ram operates, the upper punch plate 14 can move up and down on the upper guide rod 11 integrally with the upper ram. A T-shaped groove portion 26 is provided in the lower portion of the pull-down plate 25, and a T-shaped joint of a lower ram (not shown) of the press body 55 is fitted in the groove portion 26. Therefore, when operating the lower ram,
Lower plate 25 and die plate 2 integrated with lower ram
Is relatively movable up and down on the lower guide rod 12.

The die plate 2, the upper punch plate 14,
The die 43, the upper punch 48, and the lower punch 50 are attached to the lower punch plate 20 and the lower punch plate 20 by the mold clamping device 27 according to the present invention.

As shown in FIG. 2, the upper punch 48 has a columnar shape integrally provided with a flange portion 49 that projects radially outward in a ring shape, as shown in FIG. It is designed to be attached to the upper punch plate 14 side in a state of being in close contact with the lower surface side of the plate 14.

A cylindrical support column 15 is integrally provided at the center of the lower surface of the upper punch plate 14, and a predetermined screw 16 is screwed onto the peripheral surface of the support column 15. A disc-shaped support plate 17 having a diameter larger than that of the support column 15 is integrally provided at the lower end of the support column 15. The support plate 17 is used for inserting rods at a plurality of positions at predetermined intervals in the circumferential direction. Holes 18 are provided.

The mold clamping device 27 includes a fastening body 28 that fastens the upper punch 48 to the upper punch plate 14, and a screw fastening body 39 that holds the upper punch 48 in a fastening state or releases the fastening state of the upper punch 48. It has and.

The fastening body 28 includes an annular clamp ring 29 that presses the upper punch 48 in the fastening direction, and an annular piston ring 36 that is mounted around the support column 15 of the upper punch plate 14 and is vertically movable. , A plurality of connecting rods 37 that insert the respective rod insertion holes 18 of the support plate 17 of the upper punch 48 and connect the clamp ring 29 and the piston ring 36 in this state, the lower surface of the piston ring 36 and the support plate. The disc spring 38 is a biasing member that is interposed between the disc spring 38 and the upper surface of the disc 17. Then, the piston ring 36 is biased upward by the biasing force of the disc spring 38, whereby the clamp ring 29 is pressed upward through the plurality of connecting rods 37, and the upper punch 48 is pressed in the fastening direction. It is a thing.

An insertion hole 30 for inserting the upper punch 48 is provided at the center of the clamp ring 29, and an upper end portion of the insertion hole 30 has an annular step with which a flange portion 49 of the upper punch 48 is engaged. The part 31 is formed.

At the peripheral portion of the hole 30 for inserting the clamp ring 29, rod holding holes 33 are provided at predetermined intervals in the circumferential direction, and the connecting rod 37 is provided in the rod holding hole 33. Connecting rod 3 by engaging the head
7 is held by the clamp ring 29.

The screw fastening body 39 is used for the upper punch plate 14
Male screw portion 15 which is one screw portion also used as the support pillar 15 of
And is provided above the piston ring 36,
A female threaded portion 4 which is the other annular threaded portion on which a screw 41 which is screwed into the screw 16 of the male threaded portion 15 is screwed on the inner peripheral surface.
It is composed of 0 and 0. An annular transmission member 42 is interposed between the upper surface of the piston ring 36 and the lower surface of the female screw portion 40, and the load from the female screw portion 40 is transmitted to the piston ring 36 side via the transmission member 42. It is like this.

Then, the screwing position of the female screw portion 40 with respect to the male screw portion 15 of the screw fastening body 39 is adjusted so that the female screw portion 40
Is positioned at a predetermined position in the vertical direction, the piston ring 36 is positioned at a predetermined position in the vertical direction,
The biasing force of the disc spring 38 is held at a predetermined value, and the upper punch 48 is held in a state of being fastened with a predetermined fastening force.

Then, the screwing position of the female screw portion 40 to the male screw portion 15 of the screw fastening body 39 is adjusted to adjust the female screw portion 40.
By moving the piston ring 36 downward to move the piston ring 36 downward against the urging force of the disc spring 38.
The clamp ring 29 moves downward via 7 and the fastening state of the upper punch 48 by the fastening body 28 is released.

As shown in FIG. 3, the die 43 has a substantially columnar shape and is attached to the center of the die plate 2, and a cylindrical molding cavity 44 is vertically penetrated through the center of the die 43. It is designed to be installed in. Molding space 4
An upper punch 48 is inserted from above during powder molding in the inside of 4, while a lower punch 50 is inserted from below. The outer peripheral surface of the die 43 is formed in three stages of an upper small diameter portion 45, a large diameter portion 46, and a lower small diameter portion 47.

A die-holding hole 3 is provided in the center of the die plate 2, and the die 43 can be mounted in the die-holding hole 3 via the above-described mold clamping device 27 of the present invention. Has become. The inner peripheral surface of the die holding hole 3 has a large diameter portion 4 into which the upper small diameter portion 45 of the die 43 is loosely fitted, a middle diameter portion 5 into which the large diameter portion 46 of the die 43 is fitted, and a lower small diameter of the die 43. It is formed in three stages of the small diameter part 6 into which the part 47 is fitted. Holes 7 for inserting rods are provided at a plurality of positions at predetermined intervals in the circumferential direction in the peripheral portion of the holes 3 for holding the die of the die plate 2, and the holes 7 for inserting rods are provided. A groove portion 8 having a predetermined depth is annularly provided on the lower surface side of the die plate 2 corresponding to. Hole 3 for holding the die on the lower surface side of the die plate 2
An annular support column 9 is integrally provided on the peripheral edge of the support column 9, and a predetermined screw 10 is screwed on the outer peripheral surface of the support column 9.

The die clamp device 27 has substantially the same structure as the die clamp device 27 for the upper punch 48 described above, and includes a fastening body 28 for fastening the die 43 to the die plate 2, and a die 43. Is held in a fastened state or released from the fastened state.

The fastening body 28 is fitted between the large-diameter portion 4 of the die holding hole 3 of the die plate 2 and the upper-small diameter portion 45 of the die 43 to press the die 43 in the fastening direction. The clamp ring 29, the annular piston ring 36 provided around the support column 9 of the die plate 43 and movable in the vertical direction, and the rod insertion holes 7 of the die plate 2 are inserted and clamped in this state. A plurality of connecting rods 37 that connect the ring 29 and the piston ring 36, and a disc spring 38 that is an urging member interposed between the upper surface of the piston ring 36 and the bottom surface of the groove portion 8 of the die plate 2 are provided. I have it. The piston ring 36 is urged downward by the urging force of the disc spring 38, so that the connecting rod 37
The clamp ring 29 is pressed downward via the
3 is pressed in the fastening direction.

A die 43 is provided at the center of the clamp ring 29.
An insertion hole 30 for inserting the upper small diameter portion 45 is provided, and rod holding holes 33 are provided at a plurality of positions at predetermined intervals in the peripheral direction of the insertion hole 30 in the circumferential direction. The connecting rod 37 is held by the clamp ring 29 by engaging the head portion of the connecting rod 37 with the rod holding hole 33.

The screw fastening body 39 is provided on the lower surface side of the die plate 2, which also serves as the supporting column 9, and on the lower surface side of the piston ring 36 of the fastening body 28, and on the inner peripheral surface thereof. 9 and a ring-shaped female screw portion 40 on which a screw 41 screwed with each other is screwed. An annular transmission member 42 is interposed between the lower surface of the piston ring 36 and the upper surface of the female screw portion 40, and the load from the female screw portion 40 is transmitted to the piston ring 36 side via the transmission member 42. It is like this.

Then, the screwing position of the female screw portion 40 with respect to the male screw portion 9 of the screw fastening body 39 is adjusted to position the female screw portion 40 at a predetermined position in the vertical direction, whereby the piston ring 36 is moved in the vertical direction. Of the die 43 and the biasing force of the disc spring 38 is maintained at a predetermined value.
Is held in a state of being fastened with a predetermined fastening force.

Then, the screwing position of the female screw portion 40 with respect to the male screw portion 9 of the screw fastening body 39 is adjusted to move the female screw portion 40, and the piston ring 36 is moved upward against the biasing force of the disc spring 38. The clamp ring 29 is moved upward via the connecting rod 37 by moving the connecting rod 37, and the fastening state of the die 43 by the fastening body 28 is released.

As shown in FIG. 4, the lower punch 50 has a columnar shape integrally provided with a flange portion 51 projecting radially outward in the lower end portion as shown in FIG. It is designed to be attached to the lower punch plate 20 side in a state of being in close contact with the upper surface side of 20.

A cylindrical support column 21 is integrally provided at the center of the upper surface of the lower punch plate 20, and a predetermined screw 22 is screwed on the peripheral surface of the support column 21. A disc-shaped support plate 23 having a diameter larger than that of the support column 21 is integrally provided on the upper end of the support column 21, and rods are inserted into the support plate 23 at a plurality of positions at predetermined intervals in the circumferential direction. Holes 24 are provided.

The die clamp device 27 has the same structure as the die clamp device 27 for the upper punch 48, and includes a fastening body 28 for fastening the lower punch 50 to the lower punch plate 20 side, and a lower punch. The screw fastening body 39 holds the fastening state 50 or releases the fastening state.

The fastening body 28 includes an annular clamp ring 29 that presses the lower punch 50 in the fastening direction, and an annular piston ring 36 that is provided around the support column 21 of the lower punch plate 20 and is vertically movable. , Through the holes 24 for inserting the rods of the support plate 23 of the lower punch plate 20,
In this state, a plurality of connecting rods 37 that connect the clamp ring 29 and the piston ring 36, and a disc spring 38 that is an urging member interposed between the upper surface of the piston ring 36 and the lower surface of the support plate 23. Is equipped with. When the piston ring 36 is urged downward by the urging force of the disc spring 38, the clamp ring 29 is pressed downward via the connecting rod 37 and the lower punch 50 is pressed in the fastening direction. .

An insertion hole 30 for inserting the lower punch 50 is provided at the center of the clamp ring 29, and a step portion for engaging the flange portion 51 of the lower punch 50 at the lower end of the insertion hole 30. 31 is provided.

Holes 30 for holding rods are provided in the peripheral portion of the holes 30 for inserting the clamp ring 29 in the circumferential direction at predetermined intervals, and the holes 30 for holding rods are provided with the connecting rods 37. By engaging the head portion, the connecting rod 37 is held by the clamp ring 29.

The screw fastening body 39 is used for the lower punch plate 20.
Male screw portion 21 that also serves as support pillar 21, and piston ring 3
6 is provided at the lower part of the inner peripheral surface of the male screw portion 21.
2 and a ring-shaped female screw portion 40 on which a screw 41 that is screwed with each other is screwed. An annular transmission member 42 is interposed between the lower surface of the piston ring 36 and the upper surface of the female screw portion 40, and the load from the female screw portion 40 is transmitted to the piston ring 36 side via the transmission member 42. It is like this.

Then, the screwing position of the female screw portion 40 with respect to the male screw portion 21 of the screw fastening body 39 is adjusted, and the female screw portion 40 is adjusted.
Is positioned at a predetermined position in the vertical direction, the piston ring 36 is positioned at a predetermined position in the vertical direction,
The biasing force of the disc spring 38 is held at a predetermined value, and the lower punch 50 is held in a state of being fastened with a predetermined fastening force.

Then, the screwing position of the female screw portion 40 with respect to the male screw portion 21 of the screw fastening body 39 is adjusted to adjust the female screw portion 40.
Is moved upward and the piston ring 36 is moved upward against the biasing force of the disc spring 38.
The clamp ring 29 is moved upward via 7 and the fastening state of the lower punch 50 by the fastening body 28 is released.

In the die clamping device 27 of the powder molding press according to this embodiment having the above-described configuration, the female screw portion 40 is screwed into the male screw portions 9, 15, 21 of the screw fastening body 39. By adjusting the position, the die 43, the upper punch 48, and the lower punch 50, which are molds, can be held in the fastening state, and the die can be released from the fastening state. Fastened and released from the fastened state is easy.

Further, since the hydraulic system is not used for fastening and releasing the die, the whole structure can be simplified and the equipment cost can be kept low. Furthermore, since there is no possibility that oil leaks and pollutes the surrounding environment due to a failure of the hydraulic system, a clean working environment can be obtained.

[0045]

As described above, according to the mold clamping device of the present invention, the mold is held in the clamped state or released from the clamped state between the support plate and the fastening body. By providing a screw fastening body, fastening of the mold,
Since the fastening can be released easily, the production efficiency can be significantly improved. In addition, since hydraulic pressure is not used for fastening and releasing the mold, oil will not leak out and pollute the surroundings due to hydraulic system failure, etc. become. Further, the screw fastening body is configured by one screw portion provided on the support plate side and the other screw portion that is mutually screwed with the one screw portion and a part of which abuts on a portion of the fastening body. Thus, by adjusting the screwing position of the other screw portion with respect to the one screw portion of the screw fastening body, the mold can be held in the fastening state or released from the fastening state. Therefore, mold fastening,
Since the fastening can be released easily, the production efficiency can be significantly improved. Further, since the structure of the screw fastening body for fastening and releasing the die is simple, the equipment cost can be kept low. Furthermore, since the mold is fastened and released by a mechanical mechanism and no hydraulic pressure is used, there is no risk of oil leaking out and contaminating the surrounding area due to a hydraulic system failure, etc. It will be possible to provide a good environment.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a mold clamping device of a powder molding press according to the present invention.

FIG. 2 is an enlarged view of a die clamp device for the upper punch shown in FIG.

3 is an enlarged view of a die clamp device for the die shown in FIG. 1. FIG.

FIG. 4 is an enlarged view of a lower punch die clamping device shown in FIG. 1.

FIG. 5 is a schematic sectional view showing an example of a mold clamping device of a conventional powder molding press.

[Explanation of symbols] 2 Support plate (die plate) 9, 15 and 21 One screw part (male screw part) 14 Support plate (upper punch plate) 20 Support plate (lower punch plate) 28 Fastener 39 screw tightening body 40 Other screw part (female screw part) 43 Die 48 mold (upper punch) 50 mold (lower punch)

Claims (2)

[Claims] 1. A mold clamping device of a powder molding press for fastening a mold to a support plate with a fastening body, wherein the mold is held in a fastened state between the support plate and the fastening body, or A die clamping device for a powder molding press, comprising a screw fastening body for releasing the die from a fastened state. 2. The mold clamping device of the powder molding press according to claim 1, wherein the screw fastening body is screwed into one screw portion provided on the support plate side and the one screw portion. In addition, the mold clamping device of the powder molding press machine is characterized in that it comprises the other screw part that abuts against a part of the fastening body.