KR100201235B1 - Securing device for molding mold - Google Patents

Abstract

The present invention relates to a mold fixing gripping apparatus for fixing a mold mounted on a press die, an extruder or an injection molding machine to a template, and the mold fixing gripping apparatus according to the present invention is inserted into a T-shaped groove formed in a template of an injection molding machine. A main body having a magnetic coupling portion, a clamping means rotatably installed on the main body via a shaft to fix the mold to the die plate, a piston slidably inserted into the hydraulic cylinder and partitioned into a small oil chamber and a large oil chamber; The lower surface is in contact with the tapered inclined surface formed on the outer peripheral surface of the rod portion of the piston, and the upper side is in contact with the lower surface of the proximal end of the clamp means through the through hole formed in the hydraulic cylinder, When oil is supplied in the small oil chamber and the large oil chamber partitioned by the piston The mold is disposed between the rod for rotating the grip portion of the clamp means clockwise to grip the mold, and the recess formed in the piston and the cover of the hydraulic cylinder to hold the mold by the clamp means. Elastic means for biasing the piston to the small oil chamber side to maintain the holding state of the piston, and the gripping portion of the clamp means to release the holding state of the mold when the oil supplied into the large oil chamber of the hydraulic cylinder is discharged. And a urging means for rotating in a clockwise direction.

Description

Mold fixing gripping device

The present invention relates to a mold fixing gripping apparatus for fixing a mold mounted on a press mold, an extruder or an injection molding machine to a template.

Conventionally, in order to fix-mount a mold on a template of a press, an extruder or an injection machine, an operator has to fix the mold on the template of the press, extruder or injection machine by tightening a plurality of mold fixing bolts and nuts.

When the mold is fixed to the template of the press, extruder or injection machine by tightening a plurality of mold fixing bolts and nuts, the mold is firmly fixed to the template of the press, extruder or injection machine. It is necessary to frequently replace the mold fixed to the template of the press, extruder or injection machine.

Therefore, by tightening a plurality of mold fixing bolts and nuts to fix the mold to the template of the press, extruder or injection machine, by removing the bolt and nut to remove the mold fixed to the template of the press, extruder or injection machine, Since the new mold must be fixed to the template of the press, extruder or injection machine by tightening the bolts and nuts, the mold replacement time can be extended for a long time, thereby increasing the operating time of the press, extruder or injection machine (hereinafter described as an injection machine). There was a problem that can not improve the manufacturing yield.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a mold fixing gripping device capable of quickly and accurately fixing a mold to a template of a press, an extruder or an injection machine.

Still another object of the present invention is to provide a mold fixing gripping apparatus capable of improving production yield. In order to achieve the above object, the mold fixing gripping apparatus according to the present invention includes a main body having a T-shaped coupling part inserted into and fixed to a T-shaped groove formed in a template of an injection molding machine, and rotatably installed on the main body via a shaft. A clamp means for fixing to the template, a hydraulic cylinder installed at the lower end of the clamp means, a pair of covers covering both openings of the hydraulic cylinder, a small oil chamber and a large oil being slidably inserted into the hydraulic cylinder. The lower surface is in contact with the piston partitioning into the chamber and the tapered inclined surface formed on the outer circumferential surface of one side of the rod portion of the piston, and the upper side penetrates the through hole formed in the hydraulic cylinder to the lower surface of the proximal end of the clamp means. In a small oil chamber and a large oil chamber abutted and partitioned by a piston in the hydraulic cylinder. When oil is supplied, it is disposed between the rod for rotating the grip part of the clamp means clockwise to grip the mold, and the recess formed in the piston and the cover of the hydraulic cylinder to hold the mold by the clamp means. In this case, the elastic means for biasing the piston toward the small oil chamber to maintain the holding state of the mold, and the clamp means for releasing the holding state of the mold when the oil supplied into the large oil chamber of the hydraulic cylinder is discharged. And a urging means for rotating the gripping portion counterclockwise.

1 is a perspective view showing a state in which a mold holding gripping apparatus according to one embodiment of the present invention is holding a mold.

2 is a longitudinal cross-sectional view for explaining the operation of the mold fixing gripping apparatus according to an embodiment of the present invention.

3 is a left side view of FIG.

4 is a view schematically illustrating the operation by coupling the mold fixing gripping apparatus according to an embodiment of the present invention to a hydraulic circuit.

* Explanation of symbols for main parts of the drawings

1: body 3: template

3a: T-shaped groove 5: axis

7: clamp means 7a: proximal end

7b: holding part 9: hydraulic cylinder

11: handle 13, 14: cover

13a, 14a: injection hole 15: fixing bolt

17: small oil chamber 18: big oil chamber

20: piston 20a: groove

20b: slope 20q: small diameter part

20r: large diameter part 22: elastic means

30a, 30b: packing means 32a, 32b: packing means

35: load 37: taxable means

37a: coil spring 37b: steel ball

40: oil tank 42: solenoid valve

50: power input unit 52: pump

53: check valve 54: check valve

55, 56: oil supply hose 58: check valve

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view illustrating a state in which a mold fixing gripping apparatus according to an embodiment of the present invention is holding a mold, and FIG. 2 is a longitudinal cross-sectional view illustrating an operation of the mold fixing gripping apparatus according to an embodiment of the present invention. 3 is a left side view of FIG. 2, and FIG. 4 is a view schematically illustrating an operation by coupling a mold fixing gripping apparatus according to an embodiment of the present invention to a hydraulic circuit.

1 to 4, the mold fixing gripping apparatus according to the embodiment of the present invention is a T-shaped coupling portion inserted into and fixed in the T-shaped groove 3a formed in the template 3 of the injection molding machine. The main body 1 having the la is provided with clamp means 7 which pivots about the shaft 5 to fix the mold 100 so as to fix the mold 100. The hydraulic cylinder 9 divided into the small oil chamber 17 and the large oil chamber 18 by the piston mentioned later is provided in the lower part of the base end part 7a.

In other words, in the hydraulic cylinder 9, small oil chambers 17 and large oil chambers 18 of different sizes are respectively defined by the perston 20 in the left and right sides thereof, and the piston 20 ) Is slidably inserted to the left or right along the inner circumferential surface of the hydraulic cylinder 7. When oil is supplied to the small oil chamber 17 and the large oil chamber 18 at the same time, the volume of the small oil chamber 17 on the left side is right oil chamber ( It is formed smaller than the volume of 18).

When the mold 100 is gripped by the mold fixing gripping apparatus of the present invention in the oil chamber 18, that is, between the cover 14 and the recess 20a formed in the piston 20, the hydraulic cylinder ( An elastic means 22 is provided to bias the piston 20, which is slidably inserted in 9), from being pushed to the right in FIG.

In the above description, the piston 20 has an industrial shape, and the piston 20 is fitted with the small diameter portion 20q fitted into the small oil chamber 17 and the large oil chamber 18. A large diameter portion 20r, a tapered inclined surface 20b formed on an outer circumferential surface of one side of the rod portion between the small diameter portion 20q and the large diameter portion 20r and the large diameter portion 20r and formed on the elastic means 22 It has a groove portion (20a) formed to accommodate one side of.

On the inclined surface 20b of the piston 20, a rod 35 that biases the clamp means 7 clockwise in FIG. 2 is mounted, and a lower surface of the rod 35 is attached to the piston 20. The inclined surface is formed to be in close contact with the formed inclined surface 20b, and the rod 35 is in close contact with the inclined surface 20b formed at the piston 20, and the hydraulic pressure is generated as the piston 20 moves to the left. The top surface of the rod 35 is proximal end 7a of the clamp means 7 so as to protrude outward through the through hole 9a formed in the cylinder 9 to bias the clamp means 7 clockwise. Abut on the bottom surface.

At the rear of the hydraulic cylinder 9, the handle 11 is installed to carry the mold fixing gripping device, and at the left and right sides thereof, the left and right covers 13 and 14 are shown in detail in FIG. The hydraulic cylinders 9 are each sealed by a plurality of fixing bolts 15, and the hydraulic cylinders 9 are integrally fixed to the flange portions 1b and 1c formed integrally with the main body 1 by the fixing bolts 28. have.

In addition, injection holes 13a and 14a are formed in the left and right lids 13 and 14 so as to supply oil into respective oil chambers 17 and 18, respectively, and oil supply hoses in the injection holes 13a and 14a. Hydraulic hose coupling joints 27 coupled to 55 and 56 (see Fig. 4) are coupled.

The left and right lids 13 and 14 have packing means 30a and 30b to prevent leakage of oil injected into the oil chambers 17 and 18 through the space between the left and right lids 13 and 14 and the hydraulic cylinder 9. Is provided, and the packing means (32a,) so as not to leak or flow oil between the oil chamber (17, 18) on the outer peripheral surface of the small diameter portion (20q) of the piston 20 and the outer peripheral surface of the large diameter portion (20r) 32b) is installed.

On the other hand, the main body 1 is provided with a urging means 37 for urging the clamp means 7 counterclockwise. The urging means 37 is composed of a coil spring 37a and a steel ball 37b which is provided at the distal end of the coil spring 37a and abuts on the lower surface of the clamp means 7.

The operation and effects of the mold fixing gripping apparatus according to an embodiment of the present invention configured as described above will be described in detail.

In order to fix the upper or lower mold 100 using the mold fixing gripping apparatus according to an embodiment of the present invention, three sets or four sets are generally required, but these three sets or four sets of mold fixing gripping apparatuses are used. Since the method of fixing the mold 100 is the same, only the operation of one set of mold fixing gripping apparatus will be described.

First, by holding the handle 11 and the main body 1, the T-shaped groove of the template (3) is fixed to the injection machine to the T-shaped engaging portion (la) formed integrally with the main body ( 3a), it is temporarily fixed in the four directions of the mold 100 between the template 3 and the grip portion 114 of the clamp means 7 as shown in FIG.

Next, the hydraulic hose is connected to the joint 27 provided in the covers 13 and 14 attached to the hydraulic cylinder 9. In the above description, although not shown in the drawings, the hydraulic hoses connected to the respective mold holding and gripping apparatuses are pulled out of the oil tank 40 by one hose, branched into eight lines, and coupled to the joints. Since a solenoid valve 42 is installed between the joint and the hydraulic hose connected to the oil tank 40, at the same time the power is cut off to the power input 50 of the solenoid valve 42. When power is supplied to the pump 52, the solenoid valve 42 is opened and the pump 52 operates.

At this time, the oil in the oil tank 40 is supplied to the oil supply hose (55, 56) through the check valve 53, the pump 52 and the check valve 54, it is supplied to the oil supply hose (56) The supplied oil is supplied to the large oil chamber 18 through the check valve 58, and the oil supplied to the oil supply hose 55 is supplied to the small oil chamber 17.

That is, oil of the same pressure is supplied to the small hydraulic chamber 17 and the large hydraulic chamber 18. However, since a small amount of oil is supplied to the small hydraulic chamber 1.7 and a large amount of oil is supplied to the large hydraulic chamber 18, the piston 20 penetrated into the hydraulic cylinder 9 is shown in FIG. To the left.

As the piston 20 moves to the left side, the rod 35 abutting on the inclined surface 20b of the piston 20 moves along the through hole 9a formed in the hydraulic cylinder 9. 9) It protrudes outward and pushes the base end 7a of the clamp means 7 upward.

Accordingly, since the clamp means 7 rotates clockwise about the axis 5, the grip portion 7b of the clamp means 7 firmly faces one surface of the mold 100 toward the template 3. (The upper or lower mold is fixed using three or four sets of mold holding gripping devices in four directions of the mold 100 in this manner). As such, when the mold 100 is fixed by the mold fixing gripping apparatus according to an embodiment of the present invention, the piston 20 is moved to the left side in FIG. 2 by the elastic means 22 installed in the large oil chamber 18. Since it is urgent, the mold 100 maintains the state firmly gripped.

Therefore, even if the hydraulic hose (not shown) is damaged or is out of power while the upper mold (left mold) or the lower mold (right mold) is firmly clamped to the mold 3, the large hydraulic chamber of the hydraulic cylinder 9 ( Since the elastic means 22 provided in the 123 always bias the piston 20 toward the small oil chamber 17, the mold 100 clamped by the mold fixing gripping apparatus according to the present invention may fall. none.

Therefore, there is no fear that the mold 100 may fall from the template 3 during the operation or when the power failure occurs, so that the worker may not be subjected to a safety accident due to the fall of the mold 100.

On the other hand, when the mold 100 is to be replaced, when the power is supplied to the power input unit 50 of the solenoid valve 42 in Fig. 4, the input port T and the output port (which are connected to the check valve 58) ( Since P) is connected to the input port R, the output port S, and the output port Q of the solenoid valve 42, respectively, the oil in the large oil chamber 18 is recovered to the oil tank 40.

At this time, since the oil in the small oil chamber 17 is not recovered into the oil tank 40, the piston 20 moves to the right in FIG. 2 by the oil pressure in the small oil chamber 17. In other words, the elastic means 22 installed in the large oil chamber 18 has the oil stored in the oil chamber 17 smaller than the force pushing the piston 20 to the left to the right. Since the pushing force is large, the piston 20 moves to the right in FIG. 2 by the oil pressure in the small oil chamber 17.

Accordingly, as the piston 20 moves to the right in FIG. 2, the clamp means 7 rotates counterclockwise around the axis 5 by the biasing force of the biasing means 37. ) Is pressed by the lower surface of the base end 7a of the clamp means 7 and pushed into the hydraulic cylinder 9. Therefore, since the grip portion 7b of the clamp means 7 is released from the mold 100 to release the clamp state, it can be replaced with another product manufacturing mold to be injected.

As described above, when the mold is fixed or replaced by the mold fixing gripping apparatus according to the present invention, the mold can be replaced more accurately and quickly than the conventional method, and the mold can be fixed or replaced quickly and accurately. Can improve the production yield.

In addition, when the mold is fixed by the mold fixing gripping apparatus according to the present invention, the piston 20 is provided by the elastic means 22 disposed in the large oil chamber 18 even if the hydraulic hose breaks or the power is cut off during the operation of the injection molding machine. Since it is maintained in a state of pushing the side toward the small oil chamber 17, the state of holding the mold 100 is maintained as it is so that the mold 100 does not fall from the injection machine, there is no fear of a safety accident during operation.

In the above description, a specific embodiment of a mold fixing gripping apparatus for fixing a mold to a template of an injection molding machine has been described as an example, but the present invention is not limited thereto. For example, the mold fixing of the present invention may be performed even for a template such as a press extruder. The gripping apparatus can also be used to fix the mold.

In addition, in the above description, a specific embodiment of a mold fixing gripping apparatus for fixing a mold to a template of an injection molding machine has been described as an example, but the present invention is not limited thereto, and the general knowledge in the art to which the technology of the present invention pertains is described. It is a matter of course that the design can be changed by the person having it.

As described in detail above, the mold holding gripping apparatus according to the present invention is rotatably provided with a clamp means via a shaft in the main body, and partitions the hydraulic cylinder into a small oil chamber and a large oil chamber by a piston, and one side of the piston. When the oil is supplied to the small oil chamber and the large oil chamber by contacting the rod to the tapered inclined surface formed on the outer circumferential surface, the rod protrudes out of the hydraulic cylinder to fix the mold to the template by the gripping portion of the clamp means. At the same time, when the mold is held by the clamp means, the piston is urged to the small oil chamber side by the elastic means to maintain the holding state of the mold. There is no danger of falling from this template There is a very excellent effect, and when the mold clamped by the clamping means wants to replace with another mold, power is supplied to the solenoid valve to discharge the oil supplied to the large oil chamber in the hydraulic cylinder into the oil tank. By pushing the piston toward the large oil chamber by the oil pressure in the small oil chamber, the clamp state of the mold clamped in the holding part of the clamping means can be released and the mold can be easily removed from the template. By means of fast and precise clamping by means, the mold can be mounted on the template, and at the same time, the mold can be replaced quickly and accurately, thereby improving the production yield of the injection molding machine.

Claims (3)

A main body having a T-shaped engaging portion inserted into and fixed to a T-shaped groove formed in the template of the injection molding machine, clamp means installed rotatably via a shaft on the main body and fixed to the mold plate, and below the proximal end of the clamp means. A hydraulic cylinder to be installed, a pair of covers covering both openings of the hydraulic cylinder, and a slidable insert mounted in the hydraulic cylinder, and a packing to prevent leakage of the small oil chamber, the large oil chamber, and the large oil chamber. The lower surface is in contact with the piston and the tapered inclined surface formed on the outer circumferential surface of one side of the rod portion of the piston, and the upper side is in contact with the lower surface of the proximal end of the clamp means through the through hole formed in the hydraulic cylinder. If oil is supplied in the small oil chamber and the large oil chamber partitioned by the piston in the cylinder, When the mold is gripped by the clamp means when it is disposed between the rod for rotating the clamping portion of the clamp means clockwise to grip the mold, and the recessed portion formed in the piston and the cover of the hydraulic cylinder. Elastic means for biasing the piston to the small oil chamber side to maintain the holding state of the piston and the gripping portion of the clamp means to release the holding state of the mold when the oil supplied into the large oil chamber of the hydraulic cylinder is discharged. A mold holding gripping apparatus, comprising a urging means for rotating in a clockwise direction. The mold holding gripping apparatus according to claim 1, wherein the pair of lids are formed with respective injection holes for respectively injecting oil into the small oil chamber and the large oil chamber. The taper-shaped inclined surface of claim 1, wherein the piston includes a small diameter portion fitted into a small oil chamber, a large diameter portion fitted into a large oil chamber, and a tapered inclined surface formed on one outer peripheral surface of the rod portion between the small diameter portion and the large diameter portion; Mold holding gripping apparatus is formed in a large diameter portion provided with a recessed portion formed to receive one side of the elastic means.

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