JPH05104533A - Mold mounting device of molding machine - Google Patents

Abstract

PURPOSE:To easily mount a mold by providing a clamp pawl and a positioning member moving each other on both sides of a mold mounting plate and providing a mold falling preventing member to the underside of the mold mounting plate. CONSTITUTION:A mold mounting device consists of the clamp pawls 6, 7 provided to the recessed parts 3, 4 formed to both side surfaces of a mold mounting plate 1 in opposed relationship so as to be freely movable inwardly and outwardly, the operation bolt 1 provided in the mold mounting plate so as to mutually move both clamp pawls, a pair of the mold positioning members 20 provided to the fitting grooves 19 provided to both side surfaces of the mold mounting plate so as to be always elastically brought into contact with them under pressure, the mold falling preventing member 30 fitted in the longitudinal groove 32 provided to the lower central part of the mold mounting plate in a freely slidable manner and the fixing member 34 of the mold falling preventing member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold attaching device for a molding machine used for mounting a mold on a fixed platen and a movable platen of a mold clamping device such as an injection molding machine.

[0002]

2. Description of the Related Art Conventional die attachment is performed by bolting four locations of the die to a die attachment plate fixed to a stationary plate or by providing clamps at four locations on the left, right, top and bottom of the die attachment plate.
This clamp is individually fastened to the mold.

In addition, upon mounting, it was necessary to position the mold first, and to secure the position of the mold by some means so as not to drop the mold, and to fasten it with bolts or clamps.

[0004]

Therefore, in the conventional mounting method, it takes time for positioning first, and all the bolts and the like are tightened one by one while keeping the mold after the positioning so as not to drop. Because it takes more time, and because there are tie bars near the bolts and clamps,
The workability is poor, and it is very troublesome to change the bolt position every time the size of the mold changes, and it also affects the productivity in the case of small-volume production that requires frequent mold replacement. There was a problem.

The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to easily position and prevent the mold from falling and to fasten the mold at four positions. Despite this, the number of operations is less than in the conventional method, at two places, and even if the mold dimensions differ to some extent, it can be installed under the same means while preventing the mold from falling down. It is to provide a die mounting device for a machine.

[0006]

The features of the present invention according to the above-mentioned object are that the inside and outside are supported by guide bolts in recesses of a required width, which are provided above and below both sides of the die mounting plate on the fixed platen side and the movable platen side. The clamp claws, the operation bolts in the mold mounting plate for moving the clamp claws relative to each other, and the slidable fittings in the lateral fitting grooves provided on either side of either of the mold mounting plates. It is slidable in a pair of left and right mold positioning members that are mounted and constantly elastically pressed inward by a spring member, and a vertical fitting groove provided in the lower center of one of the mold mounting plates. And a fixing member that is in contact with the side surface of the drop prevention member from the side of the mold mounting plate.

Another feature of the present invention is that the positioning member for the die is provided in a through hole provided in the clamp claws on either side of the die mounting plate together with a spring member that constantly presses the die inward. There is something.

[Operation] In the above configuration, when the mold is inserted in a closed state between the mold mounting plates bolted to both the fixed platen and the movable platen, the mold mounting plates are placed on both sides of the mold mounting plate. By the protruding positioning member, even if the mold is laterally displaced, the mold is brought closer to the center of the mold mounting plate and positioned.

The upper and lower positions of the die are determined by the set position of the fall prevention member at the lower center, and the die is supported by the fall prevention member to maintain its position.

If the clamp bolt is continuously rotated in this state, the clamp bolt is prevented from moving in the axial direction by the holding member. Therefore, the clamp bolt and the other clamp claw screwed together are relatively moved. As a result, both clamp claws move inward in the recess while being supported by the guide bolt.

Eventually, it will be engaged with the stepped portions on both side edges of the die on the die mounting plate, and the die will be held by the clamp plate while the opposite positions of the both sides are held by the clamp claws. And it is securely attached to both the movable platen.

[Embodiment] The present invention will be described in detail below with respect to the mold mounting plate 1 on the movable platen side. As shown in FIG. 2, bolt holes 2 and 2 are formed at four positions on the upper and lower sides of the mold mounting plate 1, and recesses 3 and 4 having a required width are provided on the upper and lower sides of both sides. A through hole 5 opened at the center of the recess is provided in the plate body between the pair of left and right recesses 3, 4.

Clamping claws 6 and 7 are located opposite to the recesses 3 and 4, respectively, and these are parallel to the through hole 5 and are provided on a pair of guide bolts 8 and 8 provided in the recesses 3 and 4, respectively. A bolt hole 9 that is movably inserted in and provided on the side of the plate body, and has a engaging step portion at the center of one clamp claw 6,
A screw hole 10 is provided at the center of the other clamp claw 4.

Reference numeral 11 denotes an operating bolt of a long clamp, the tip of which is connected to the screw shaft 12. The clamp bolt 6 is inserted from one clamp claw 6 through the through hole 5 into the other recess 4 to project into the protruding screw shaft 12. The other clamp claw 7 is screwed.

Further, the bolt head 13 of the operation bolt 11 is provided with a fitting hole such as a wrench, so that the bolt head 1
3 is engaged with the bolt hole 9 and then one clamp claw 6
A holding member 15 for the operation bolt 11 having a wrench insertion port 14 is provided on the outer side of the operation bolt 11 so that the operation bolt 11 does not protrude from one clamp claw 6.

Reference numeral 16 is a spring member which prevents one of the clamp claws 6 and 7 from being biased. Also the mold mounting plate 1
The chain line shown in the center of indicates the position of the locate ring mounting hole provided in the center of the die mounting plate on the stationary plate side.

Reference numeral 20 is a positioning member for the mold 18 provided on both sides of the lower portion of the mold mounting plate 1, and is slidably fitted in a lateral fitting groove 19 provided adjacent to the recess 3. ..

As shown in FIG. 4, the positioning member 20 has a guide block 2 in which the inner surface is formed as an upward inclined surface 23 on the upper surface of a sliding plate 22 having fitting grooves 21 on both sides.
4 is integrally formed.

The positioning member 20 has a through hole 25 in the sliding plate, and is always inwardly inward by a spring member 27 around the pin 26 which is inserted through the through hole 25 and screwed to the die mounting plate side. Is being suppressed.

Reference numeral 30 denotes a die fall prevention member provided in the lower central portion of the die mounting plate 1, and has a step portion 31 for receiving the lower edge of the die 18, as shown in FIG. Even if the lower side of the mold 18 is positioned below the step 31, the fall prevention member 30 is configured so that the thickness of the step 31 is pushed into the die mounting plate and coincides with the plate surface. , Or the vertical fitting groove 32 provided in the mold mounting plate 1 so that the mold clamping force does not act during mold clamping.
A play is provided inside and outside so that it can be slid vertically.

Further, a spring for resiliently pressing the fall prevention member 30 outward is provided between the bottom of the fitting groove 31 and the fall prevention member 30 so that the fall prevention member 30 does not sink into the fitting groove due to the above play. A member 33 is provided.

Reference numeral 34 denotes a fixing member for the fall prevention member 30, which is a pin screwed from a side portion of the die mounting plate 1 to a notch 35 formed on a side surface of the fall prevention member 30. Can be fixed at any position of the fitting groove 31.

The examples shown in FIGS. 6 to 8 are cases in which the crank claw 6 is provided with a positioning member by a pin 20a, and the positioning pin 20a is provided in the upper part of the crank claw 6 with a stepped through hole. 19a is inserted together with a spring member 27a which always elastically presses inwardly, and the tip end portion thereof has a crank claw 6a.
It protrudes from the inner side of the mold onto the mold mounting plate. Reference numeral 26a is a receiving plate of the spring member 27a.

In the above embodiment, both the positioning member 20 and the fall prevention member 30 are mounted on the mold mounting plate 1 on the movable plate side. As for the positioning member, it is preferable to attach the fall prevention member to the mold mounting plate on the movable plate side.

Further, as shown in FIG. 2, the mold attached thereto is not limited to a fixed size, and the mold mounting plate 1
If the mold 18 has a size such that the clamp claws 6 and 7 can engage with each other in the range from the side end of the mold to the inner edge of the recess, it can be easily mounted.

In order to attach the mold 18 to the mold attaching device having the above-mentioned structure, as shown in FIG. 5, the mold 18 composed of a pair of split molds is closed to bring it up to an appropriate distance. It is suspended between the fixed board A and the movable board B.

The lower corner of the mold 18 is the positioning member 20.
When it comes into contact with, the positioning member is moved outward by the inclined surface 23 against the spring member 26, and its reaction force presses the mold 18 inward to correct the lateral deviation.

The vertical position of the mold 18 is determined by the position of the step 31 of the fall prevention member 30 set from the mold size.

In the embodiment shown in FIG. 6 and subsequent figures, the positioning pin 20a protruding from the crank claw is replaced by the spring member 26a.
The position of the die 18 in the lateral direction is corrected while moving outward in the crank claw against the force.

Next, the mold 18 is formed by the clamp claws 6 and 7.
Can be attached by rotating the operation bolt 11 with a dedicated wrench. Since the bolt head 13 of the operation bolt 11 is held down, the operation bolt 11 and the other clamp claw 7 screwed onto the screw shaft 12 are moved relative to each other by rotation, so that both clamps are clamped. Nails 6,
7 is moved inwardly in the recesses 3 and 4 while being supported by the guide bolts 8 and 8.

Then, the clamp claws 6, 7 come to engage with the step portions on both side edges of the die 18 on the die mounting plate,
Is firmly fixed to the die mounting plate 1 of the fixed plate A and the movable plate B while being held by the clamp claws 6 and 7 at opposite positions on both side edges.

[Advantages of the Invention] As described above, the present invention
Clamp claws 6 and 7 are provided in the recesses 3 and 4 of a required width, which are vertically opposed to each other on both sides of the fixed plate side and the movable plate side of the mold mounting plate 1, and are supported by guide bolts 8 to be movable inward and outward. Operation bolt 1 in the mold mounting plate that moves the clamp claws 6, 7 relative to each other
1 and a pair of left and right molds that are slidably fitted in lateral fitting grooves 19 provided on both sides of either one of the mold mounting plate 1 and elastically pressed inward by a spring member 27. Positioning member 20, a fall prevention member 30 for the mold 18 slidably fitted in a vertical fitting groove 32 provided in the lower central portion of one of the mold mounting plates 1, and the mold mounting The fixing member 34 abutting on the side surface of the fall prevention member 30 from the side portion of the plate 1.
Since the mold mounting device is configured as follows, the following effects are obtained.

Since it is not necessary to perform tightening for each mounting bolt or clamp as in the past, the mounting time of the mold can be shortened and frequent mold replacement can be dealt with.

Since the clamp claws are moved in the concavity opposite to each other so that the mold can be fastened, it can be applied to a certain size of the mold, and the size of the mold is the same as before. It is not necessary to change the position of the clamp claws every time is changed.

Since the clamp claws are supported by the guide bolts provided in parallel with the crank bolts, the inward movement of the clamp claws can correct the verticality of the mold, and it is necessary to make the verticality strict during temporary support. Since it is not there, it does not take time to install.

A slight lateral displacement of the mold is naturally corrected by the positioning members on both sides, and it is not necessary to hang the mold between the mold mounting plates while determining the mold position as before, so the work before clamping is performed. But in a short time.

Since the fall prevention member also serves as the positioning of the upper and lower parts of the mold, no special positioning member is required, and the position is maintained during the completion of the clamping, so that the positional deviation occurs during the clamping work. Never.

When the positioning pins are provided on the clamp claws on both sides, since the fitting groove of the positioning member is not provided on the mold mounting plate, the structure of the mold mounting plate is simplified accordingly and the mold mounting plate is The positioning pin can be provided even when it is small and installation space is limited.

Since the work of mounting the mold is simplified and the mounting time is shortened as compared with the conventional case, it is convenient for a molding machine of a large variety and small quantity production, in which the molds are frequently exchanged, and the productivity is increased.

[Brief description of drawings]

FIG. 1 is a front view on a movable plate side of a molding machine equipped with a mold attaching device according to the present invention.

FIG. 2 is a front view of a half section of the mold attaching device.

FIG. 3 is a cross-sectional view of an operation bolt portion of the die mounting plate.

FIG. 4 is a perspective view of a positioning member.

FIG. 5 is a vertical cross-sectional view of a portion of the fall prevention member, which is shown by a chain line in relation to the mold.

FIG. 6 is a front view of an embodiment in which a positioning pin is provided on a clamp claw.

FIG. 7 is a front view of a clamp claw portion provided with a positioning pin.

FIG. 8 is a vertical sectional side view of the above.

[Explanation of symbols]

 1 Type Mounting Plate 2 Bolt Hole 3,4 Recess 5 Through Hole 6,7 Clamp Claw 8 Guide Bolt 10 Screw Hole 11 Operation Bolt 12 Screw Shaft 18 Mold 19 Fitting Groove 20 Positioning Member 23 Inclined Surface 27 Spring Member 30 Drop Preventing member 31 Step portion 33 Spring member 34 Fixing member 19a Through hole 20a Positioning pin 27a Spring member

Claims (3)

[Claims] Claims: 1. Clamping claws, which are supported by guide bolts so as to be movable inward and outward, are provided in recesses of a required width, which are provided on the upper and lower sides of the die mounting plates on the stationary platen side and the movable platen side, respectively. And the operating bolts in the mold mounting plate that move the two parts relative to each other and the lateral fitting grooves provided on both sides of either of the mold mounting plates in a slidable manner, and the spring member constantly elastically presses inward. And a pair of right and left mold positioning members, which are formed by a pair of left and right molds. 2. A mold positioning member is provided in a through hole provided in a clamp claw on either side of a mold mounting plate, together with a spring member that constantly presses the mold inward. The mold attachment device of the molding machine according to claim 1. 3. A vertical fitting groove provided in a lower central portion of one of the mold mounting plates, a die fall prevention member slidably fitted in the fitting groove, and the mold. The mold attachment device for a molding machine according to claim 1 or 2, comprising a fixing member that abuts a side surface of the fall prevention member from a side portion of the attachment plate.