JPH0334411B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention mainly relates to a mold attaching/detaching device for attaching mold constituent members such as a punch, female mold, core rod, etc. to a mold plate in a die set for a powder molding machine.

[Conventional technology]

Conventionally, a die set for this type of powder molding machine has an upper punch plate 1 as shown in FIG.
The female plate 2, the lower punch plate 3, and the pull-down plate 4 are connected via sliding shafts 5, 6, respectively, and along each sliding shaft 5, 6, each plate 1, 2, 3, 4 It is known that the space between the two can be opened and closed. And each plate 1, 2,
3 and 4 respectively include an upper punch 7, a female mold 8, a lower punch 9, and a core rod 10, which constitute the mold.
A plurality of tightening bolts 1 are inserted through an upper punch clamp ring 11, a female clamp ring 12, a lower punch clamp ring 13, and a core rod holder 14.
5, 16, 17, and 18.

[Problem that the invention seeks to solve]

By the way, the die set to which the mold for the powder molding machine is attached as described above is assembled into the powder molding machine. Therefore, it is common to replace the mold by removing the die set from the powder molding machine.
The work of attaching and detaching a heavy die set requires a forklift or a chain block, which is time consuming and dangerous.

It is also possible to replace the mold with the die set still assembled in the powder molding machine, but in this case, a large number of clamps are required in the narrow space between each plate 1, 2, 3, and 4. Bolts 15, 16, 1
Since it is necessary to attach and detach the parts 7 and 18, which takes a lot of time, there is a problem that the operating time of the powder molding machine is reduced.

The present invention was made in view of the above circumstances, and
The object thereof is to provide a mold attachment/detachment device that can easily, quickly, and reliably attach a mold component to a mold plate and has extremely high safety.

[Means for solving problems]

In order to achieve the above object, a first aspect of the present invention is such that a clamp body for sandwiching a mold component between a mold plate and a mold plate is removably fitted into the mold component, and A wedge rod is slidably engaged, and a tapered portion that matches the slope formed on the clamp body is formed at the tip of the wedge rod.

In addition, in the second invention, a clamp body that clamps the mold component between the mold plate and the mold plate is removably fitted to the mold component, and the engager is removably locked to the clamp body. , and a wedge rod is slidably engaged with the engager, and a tapered portion that matches the slope formed on the engager is formed at the tip of the wedge rod.

[Effect]

In the mold attaching/detaching device of the present invention, when attaching the mold component to the mold plate, the mold component is inserted between the clamp body and the mold plate, and the wedge rod is attached to the clamp body or the clamp. By sliding it against the engager that is fixed to the body, the inclined surface formed on the clamp body or the engager,
The mold component is fixed between the mold plate and the clamp body by bringing the tapered portions of the wedge rods into contact with each other.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 6.

FIG. 1 shows the overall structure of a die set for a powder molding machine equipped with a mold attaching/detaching device according to the present invention. In this die set, like the conventional example shown in FIG. 11, the female plate 21 of the upper punch plate 20, the lower punch plate 22, and the pull-down plate 23 are connected via sliding shafts 24 and 25, respectively. In addition, the plates 20, 21, 22, 23 are configured to open and close along the respective sliding shafts 24, 25. The mold also includes an upper punch 26 attached to the lower surface of the upper punch plate 20,
Female mold 2 attached to the center of female mold plate 21
7 and the holder 2 on the top surface of the lower punch plate 22.
8 and a core rod holder 30 attached to the upper surface of the lowering plate 23.
It consists of a core rod 31 which is attached via a.

The lower punch 29 has a flange portion 33 integrally formed at the lower end of a lower punch body 32 having a convex cross-section, and a through hole 34 through which the core rod 31 is inserted. A mechanism for attaching the lower punch 29 to the holder 28 fixed to the upper surface of the lower punch plate 22 will be described in detail with reference to FIGS. 2 and 3.

The lower punch 29 is placed with its through hole 34 aligned with the through hole 35 passing through the center of the holder 28, and the flange portion 33 of the lower punch 29 has a A pair of clamp pieces (clamp bodies) 36a and 36b are fitted into each other at symmetrical positions. These clamp sesame 36a, 36b are
Arc-shaped recesses 37a, 37 corresponding to the curvature of the lower part of the lower punch body 32 are provided at the upper end of each of them.
b is formed with arc-shaped recesses 38a and 38b corresponding to the curvature of the flange 33 at the lower end thereof, and slide grooves 39a and 38b are formed in the center thereof.
9b is formed. In addition, the holder 28
Upper and lower through holes 40a and 40b are respectively formed at positions facing the respective slide grooves 39a and 39b, and these through holes 40a and 40b
Engagement elements 41a and 41b are fitted into the respective parts. These engagers 41a and 41b have a thin wall portion 42 formed by a pair of mutually parallel grooves in the upper part.
It has a cylindrical shape with engagement holes 43a and 43b formed in the lower part thereof in a direction perpendicular to each of the grooves. Thin wall portions 42a and 42b of each engager 41a and 41b
are fitted into the slide grooves 39a, 39b of the clamp rubbers 36a, 36b, and the lower surfaces of the engagement holes 43a, 43b of the respective engagers 41a, 41b are inclined surfaces 44a, 44b having an inclination angle θ. ing. Each of the above-mentioned engagement holes 4 of the above-mentioned holder 28
A pair of horizontal holes 4 are located at positions opposite to 3a and 43b.
5a and 45b are bored perpendicularly to the respective through holes 40a and 40b. A pair of wedge rods 46 are provided in these horizontal holes 45a, 45b and the engagement holes 43a, 43b of the engagers 41a, 41b.
a, 46b are fitted, and each wedge rod 46
The above-mentioned engagement holes 43a, 46b are provided at the tips of
Tapered portions 47a and 47b are formed to match the inclined surfaces 44a and 44b of 43b. moreover,
Threaded portions 48a, 48b are formed at the base end of each wedge rod 46a, 46b, and these threaded portions 48a, 48b are fixed to both ends of the bar 50 by two nuts 49, respectively. has been done. A tightening screw 5 is provided in the center of the bar 50.
1 is rotatably attached, and this tightening screw 5
1 is screwed into a screw hole 52 bored in the holder 28.

Further, the upper punch 26 is connected to the lower punch 29.
A flange portion 54 is formed at one end of an upper punch main body 53 that has approximately the same shape as, that is, a convex cross section, and this upper punch 26 has a pair of clamp pieces 55a and 55b, and an engaging element 56.
a, 56b, wedge rods 57a, 57b, a plurality of nuts 58, one bar 59, and a tightening screw 60 to be attached to the lower surface of the upper punch plate 20. Although the clamp sesame 55a is not shown, it has the same shape as the clamp sesame 55b, and in FIG. It is something that Furthermore, the core rod 31
is fitted into the upper center of the core rod holder 30, and this core rod holder 30
A flange portion 61 is formed at the lower end. And this core rod holder 30 is
a pair of clamp sesame 62a, 62b, respectively;
Engagement elements 63a, 63b and wedge rods 64a, 64
b, a plurality of nuts 65, and one bar 66
and a tightening screw 67, so that it can be attached to the upper surface of the pull-down plate 23. The mechanism for attaching these upper punches 26 and core rods 31 to each plate 20, 23 is the same as the mechanism for attaching the lower punch 29 to the holder 28 described above, so a description thereof will be omitted.

Furthermore, the female mold 27 has a convex cross section and has a small diameter part 70a and a large diameter part 70b in the center.
A through hole 70 is formed therein. A mechanism for attaching the female mold 27 to the female mold plate 21 will be explained with reference to FIGS. 4 to 6.

The female mold 27 is attached to an annular lower stepped portion 71 formed on the female mold plate 21, and an annular groove 73 constituted by the annular upper stepped portion 72 of the female mold plate 21 and the female mold 27. A clamp ring (clamp body) 74 is fitted into the. A pair of locking holes 75a and 75b are formed in the lower surface of the clamp ring 74 at point-symmetrical positions. and,
These locking holes 75a, 75b are formed in an elliptical shape inside, and have a U-shaped edge 7 on the surface (lower surface).
It is formed in a keyhole shape with 6a and 76b. Further, a pair of vertical holes 78a and 78b are formed in the upper stepped portion 72 of the female plate 21 at positions parallel to the front surface 77 of the female plate 21. And, in each vertical hole 78a, 78b,
Engagement elements 79a and 79b are fitted into each. These engaging elements 79a and 79b have a cylindrical shape with annular engagement grooves 80a and 80b formed in the upper part and engagement holes 81a and 81b formed in the lower part, respectively. And each engager 79
The engagement grooves 80a, 80b of the clamp rings 74 are connected to the edges 7 of the locking holes 75a, 75b of the clamp ring 74.
6a, 76b, and each engaging element 7
The lower surfaces of the engagement holes 81a and 81b of 9a and 79b are
It is an inclined surface having an inclination angle θ. A pair of horizontal holes (not shown) are bored in the female plate 21 at positions facing the engagement holes 81a, 81b, perpendicular to the vertical holes 78a, 78b. Then, these horizontal holes and each engaging element 79
A pair of wedge rods 82a, 82b are fitted into the engaging holes 81a, 81b of the holes 81a, 79b, and the inclined surfaces of the respective engaging holes 81a, 81b are fitted at the tips of the wedge rods 82a, 82b. Tapered portions 83a and 83b are formed to match the . Furthermore, a threaded portion 8 is provided at the base end of each wedge rod 82a, 82b.
5a, 85b are formed, and these threaded parts 85a, 85b are fixed to both ends of the bar 87 by two nuts 86, respectively. A tightening screw 8 is provided in the center of the bar 87.
8 is rotatably mounted, and this tightening screw 8
The tip end of 8 is screwed into the female plate 21.

Next, a case will be described in which the upper and lower punches 26, 29, the female mold 27, and the core rod 31, which are mold constituent members, are replaced in a die set equipped with the mold attaching/detaching device constructed as described above.

Above upper and lower punches 26, 29, core rod 31
As for the replacement work, since the mechanism is almost the same, only the replacement of the lower punch 29 will be described in detail as a representative, and the explanation of the other punches 26 and core rod 31 will be omitted.

First, in order to remove the lower punch 29 that has been attached so far, the tightening screw 51 is rotated in the direction in which it comes out of the holder 28. As a result, the bar 50 with the tightening screw 51 attached moves in the direction away from the holder 28, so that the pair of wedge rods 46a and 46b fixed to both ends of the bar 50 move along the horizontal holes 45a and 45b, respectively. Then move in the direction of getting out. For this reason, each engager 41a, 4
The tapered portions 47a, 47b at the tips of the wedge rods 46a, 46b, which had been inserted into the engaging holes 43a, 43b of 1b, have moved, and the tapered portions 47a, 47b have been inserted into the engaging holes 43a, 43b. By coming into close contact with the inclined surfaces 44a, 44b, each of the engaging elements 41a, 41b, which had been pressed downward, is released, and each of the engaging elements 41a, 41b becomes able to move upward to some extent. In this state, the thin portions 42 of each engaging element 41a, 41b
Clamp sesame 36 that was locked on a and 42b
a, 36b into slide grooves 39a, 39, respectively.
When the flange portion 33 of the lower punch 29 is slid in the direction away from the lower punch 29 along the arrow b, the fixation of the flange portion 33 of the lower punch 29 by the clamp pieces 36a and 36b is released. Therefore, the lower punch 29 can be easily removed.

Next, after installing another lower punch 29 at a predetermined position on the upper surface of the holder 28, each clamp piece 36a, 3, which has been left and right open until now, is removed.
6b to the lower punch 29 side, and the clamp pieces 36a, 36b and the flange portion 33 of the lower punch 29 are fitted together. Next, tighten screw 5
1 in the direction of screwing it into the holder 28, the bar 50 with the tightening screw 51 is moved in the direction closer to the holder 28. As a result, each wedge rod 46a, 46 at both ends of the bar 50
b enters into each horizontal hole 45a, 45b, respectively, so that tapered portions 47a, 47b at the tips of each wedge rod 46a, 46b engage each engager 41a, 41.
The lower inclined surface 44a of the engagement hole 43a, 43b of b.
44b and presses each inclined surface 44a, 44b downward. As a result, each engager 41a, 41
b moves downward and presses the clamp pieces 36a, 36b that are engaged with the thin parts 42a, 42b of the respective engagers 41a, 41b toward the holder 28, so that the clamp pieces 36a, 36b are fitted into the respective clamp pieces 36a, 36b. The flange portion 33 of the lower punch 29 is firmly fixed to the holder 28, and the attachment of the lower punch 29 is completed.

In addition, in the replacement work of the female die 27, first, in order to remove the female die 27 that has been attached so far, the tightening screw 88 is rotated in the direction in which it comes out of the female die plate 21. As a result, the tightening screw 8
Since the bar 87 on which the bar 87 is mounted moves in a direction away from the female plate 21, a pair of wedge rods 82a and 82b fixed to both ends of the bar 87 move in a direction to come out of the female plate 21. Therefore, the tapered portions 83a, 83 at the tips of the wedge rods 82a, 82b inserted into the engagers 81a, 81b of the respective engagers 79a, 79b.
b has moved, until now each taper part 83a, 83
Each engaging element 7, which was pressed downward, was brought into close contact with the inclined surface of each engaging hole 81a, 81b.
9a, 79b are released, and each engaging member 79a, 79b is able to move upward to some extent. In this state, each engaging element 79a,
The edges 76a and 76b of the locking holes 75a and 75b of the clamp ring 74, which were locked in the engagement grooves 80a and 80b of the clamp ring 79b, are rotated by a rotation angle α in the circumferential direction of the clamp ring 74. According to
After the locking state is released, the clamp ring 74 is moved upward, and each of the above-mentioned engagers 79a, 79b is inserted through each locking hole 75a, 75b of the clamp ring 74.
At the same time, lift up the female mold 27 and remove it from the female mold plate 21.

Next, another female mold 27 is attached to the annular lower stepped part 71 of the female mold plate 21, and the upper stepped part 72 of the female mold plate 21 is fitted into each locking hole 75a, 75b of the clamp ring 74. After fitting the heads of the respective engaging members 79a and 79b protruding into the clamp ring 74, the clamp ring 74 is rotated by the rotation angle α in a direction opposite to the rotation direction. Thereby, the clamp ring 74 is locked to each engaging member 79a, 79b. Subsequently, by rotating the tightening screw 88 in a direction in which it is screwed into the female plate 21, the bar 87 with the tightening screw 88 mounted thereon moves in a direction toward the female plate 21. As a result, each of the wedge rods 82a and 82b at both ends of the bar 87 enters into the female plate 21.
Tapered parts 83a, 83b at the tips of 2a, 82b
are the engagement holes 81a, 81 of each engagement member 79a, 79b.
b, and press each inclined surface downward. As a result, each of the engaging elements 79a, 79b moves downward, and the clamp ring 7 is engaged with the engaging grooves 80a, 80b of each engaging element 79a, 79b.
Edges 76a, 76 of each locking hole 75a, 75b of 4
b is pressed against the female mold plate 21 side, the shoulders of the female mold 27 fitted in each clamp ring 74 are firmly fixed to the female mold plate 21, and the female mold 2
7 is attached to the female plate 21.

In this way, each plate 20, 21, 2
2, 23, the upper punch 26, female die 27, lower punch 29, and core rod 31 are tightened and fixed, but at this time, the pair of wedge rods 46a, 46b, 57a,
57b, 64a, 64b, 82a, 82b, the pair of engagers 41a, 41b, 56a,
56b, 63a, 63b, 79a, 79b are simultaneously connected to a pair of clamp sesame 36a, 36b, 55
By tightening a, 55b, 62a, 62b and the clamp ring 74, uneven tightening, which is a drawback of conventional tightening bolts, does not occur, and the upper and lower punches 26, 29,
The female die 27 and core rod 31 can be fixed. Therefore, after installing the mold, the female mold 27 is tightened partially.
There is no interference or damage between the upper and lower punches 26, 29, and the core rod 31. In addition, each clamp sesame 36a, 36b, 55a, 55b, 6
2a, 62b and the clamp ring 74 can be tightened using the respective tightening screws 51, 60, 67, 88 provided on the front surface of each plate 22, 20, 23, 21. With significantly less manual work required, molds can be installed easily and quickly. Therefore, not only can the mold exchange time be significantly shortened, but also the safety is extremely high. Furthermore, the mold attachment/detachment device with the above configuration does not use hydraulic pressure, pneumatic pressure, or electric circuits, so there is no need to arrange piping or electrical cords, and there is no problem when removing the die set from the powder molding machine. .

It should be noted that the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the gist thereof. For example, the locking portion between a wedge rod and an engaging element is not limited to a cylindrical wedge rod and an engaging element, but as shown in FIG. Square timbers may be used for this purpose. In this case, the engaging hole 9 of the engaging element 91
When fitting the tapered portion 94 at the tip of the wedge rod 92 into the wedge rod 92, alignment is easy. Also, the 8th
As shown in the figure, a tapered part 99 branched into two at the tip of a wedge rod 98 may be engaged with a thin wall part 97 of a cylindrical engager 96 having a head 95. As shown, fulcrum pin 1
00 is supported by the wedge rod 10 through the rod 102.
Push up upward by the taper part 104 of No. 3,
The flange portion 106 of the mold component 105 may be tightened and fixed using the clamping piece 101.
Furthermore, as shown in FIG.
0 may be pressed to tighten and fix the flange portion 112 of the mold component 111.
In this case, the engager shown in each of the above embodiments becomes unnecessary.

Furthermore, it goes without saying that the mold attachment/detachment device of the present invention is not limited to powder molding machines, and can also be applied to attachment/detachment of molds in other molding machines.

〔Effect of the invention〕

As explained above, the first aspect of the present invention is
A clamp body that clamps the mold component between itself and the mold plate is removably fitted to the mold component, a wedge rod is slidably engaged with the clamp body, and the tip of the wedge rod is slidably engaged with the clamp body. A tapered part is formed in the clamp body to match the inclined surface formed in the clamp body.
A clamp body that clamps the mold component between the mold plate and the mold plate is removably fitted to the mold component, an engager is removably locked to the clamp body, and a wedge rod is attached to the engager. are slidably engaged with each other, and the tip of this wedge rod is formed with a tapered part that matches the slope formed on the engaging element, so that the mold component can be attached to the mold plate. When installing, the mold component is inserted between the clamp body and the mold plate, and the wedge rod is slid against the clamp body or the engager that is locked to the clamp body. The mold configuration is achieved by fixing the mold component between the mold plate and the clamp body by bringing the tapered portion of the tip of the wedge rod into contact with the inclined surface formed on the engager. The component can be easily, quickly and reliably attached to the mold plate. Therefore, uneven tightening, which is a drawback of conventional bolt tightening, does not occur, and interference and damage between mold component parts after the mold is installed can be prevented, and mold replacement time can be significantly shortened and safety is improved. It also has excellent effects such as being extremely effective.

[Brief explanation of the drawing]

1 to 6 show one embodiment of the present invention, in which FIG. 1 is a perspective view showing the overall structure of the die set, FIG. 2 is an exploded perspective view of the lower punch attachment part,
Figure 3 is a sectional view taken along the - line in Figure 2, Figure 4 is an exploded perspective view of the female mounting part, Figure 5 is a view taken along the - line in Figure 4, and Figure 6 is a view of the clamp ring. The cross-sectional views of the stop hole portion and FIGS. 7 to 10 show other examples of the mold attaching/detaching device of the present invention, and FIG. 7 is a perspective view of the case where square pieces are used for the engager and the wedge rod. figure,
Figure 8 is a perspective view when using a wedge rod with a bifurcated structure, Figure 9 is a perspective view when the mold component is fixed by rotating the clamp, and Figure 10 is a perspective view when the wedge rod is used directly. FIG. 11 is a perspective view showing the overall configuration of a conventional die set. 20... Upper punch plate, 21... Female plate, 22... Lower punch plate, 23... Lowering plate, 26... Upper punch, 27... Female die,
28...Holder, 29...Lower punch, 30...
Core rod holder, 31...core rod,
36a, 36b...clamp sesame (clamp body),
41a, 41b... engager, 44a, 44b...
Inclined surface, 46a, 46b...wedge rod, 47a,
47b... Taper part, 55a, 55b... Clamp sesame (clamp body), 56a, 56b... Engagement element, 57a, 57b... Wedge rod, 62a, 6
2b...Clamp sesame (clamp body), 63a,
63b... Engagement element, 64a, 64b... Wedge rod, 74... Clamp ring (clamp body), 7
9a, 79b...engaging element, 82a, 82b...wedge rod, 83a, 83b...tapered portion, 91...
...Engagement element, 92...Wedge rod, 94...Tapered portion, 96...Engagement element, 98...Wedge rod, 99...
... Taper part, 101 ... Clamp sesame (clamp body), 103 ... Wedge rod, 104 ... Taper part, 105 ... Mold component, 107 ... Clamp sesame (clamp body), 108 ... Inclined surface, 1
09... Wedge rod, 110... Taper part, 11
1...Mold component.

Claims (1)

[Scope of Claims] 1. A mold attachment/detachment device for removably attaching a mold component to a mold plate, wherein a clamp body that clamps the mold component between the mold plate and the mold plate is attached to the mold structure. The wedge rod is removably fitted to the member, a wedge rod is slidably engaged with the clamp body, and a tapered portion is formed at the tip of the wedge rod to match the slope formed on the clamp body. A mold attachment/detachment device characterized by: 2. A mold attachment/detachment device for removably attaching a mold component to a mold plate, wherein a clamp body that clamps the mold component between the mold plate and the mold plate is removably fitted to the mold component. an engaging element is removably locked on this clamp body, a wedge rod is slidably engaged with this engaging element, and a slope formed on the engaging element is attached to the tip of the wedge rod. A mold attachment/detachment device characterized in that a tapered portion that matches the surface is formed.