KR200320640Y1 - Shaft line displacement part of clamp shaft for a mold fixed holding apparatus - Google Patents

Abstract

The present invention is to form a clamp that is installed on the template of the press, extruder or injection machine in a structure that can be adjusted up and down clearance within a certain range to greatly expand the dimension width of the target mold and to securely fixed Clamp shaft axial center displacement of the mold clamping device,

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, a clamp installed on the main body so as to be rotatable via a shaft to secure the mold to the template, and an elastic portion below the proximal end of the clamp. In a mold holding gripping apparatus comprising a hydraulic cylinder having a rod which is lifted by a piston supported by a member, and a biasing portion that rotates the gripping portion of the clamp counterclockwise.

A clamp shaft of the clamp carried by the attachment portion,

An axis hole formed by vertically drilling both support side plates such that the clamp shaft is assembled and the shaft center is displaced up and down;

Clamp shaft axis displacement of the mold fixing gripping device, characterized in that the configuration consisting of an adjustment screw which is screwed to the support side plate to adjust the rotation center of the clamp shaft by a wrench using a pressure plate interposed on the center vertical line of the shaft hole. There is an excellent effect of providing wealth.

Description

Axial center displacement of clamp shaft of mold clamping device {SHAFT LINE DISPLACEMENT PART OF CLAMP SHAFT FOR A MOLD FIXED HOLDING APPARATUS}

The present invention relates to the displacement of the shaft center of the clamp shaft of the mold holding gripping apparatus, and more particularly, the mold is mounted by a gap adjusting screw even if the mold thickness is variable when the mold mounted on the press die, the extruder, or the injection machine is fixed to the mold. A clamp shaft shaft displacement portion of a mold holding gripping device that is securely fixed.

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, a plurality of mold fixing bolts and nuts must be loosened to remove the mold fixed to the template of the press, extruder or injection machine, and then a new mold must be fixed to the template of the press, extruder or injection machine by tightening the bolt and nut. Since the mold replacement takes a long time, the operating time of the press, the extruder or the injection machine (hereinafter, the injection machine will be described by way of example) cannot be increased, and thus the manufacturing yield cannot be improved.

In order to solve the problems of the conventional prior art as described above, the present applicant has filed a mold fixing gripping device of Patent No. 97-2451.

As shown in Figs. 1 to 3, the mold fixing gripping apparatus 1 forms a T-shaped coupling portion 1a which is inserted into and fixed to a T-shaped groove 3a formed in the template 3 of the injection molding machine. The clamp 7 which fixes the mold 100 by rotating 100 around the clamp shaft 5 is provided.

The hydraulic cylinder 9 divided into the small oil chamber 17 and the large oil chamber 18 is provided in the lower part of the base part 7a side of the said clamp 7.

In other words, in the hydraulic cylinder 9, small oil chambers 17 and large oil chambers 18 of different sizes are respectively partitioned by pistons 20 in the left and right sides of the hydraulic cylinders 9, and the pistons 20 Is slidably inserted to the left or the right along the inner circumferential surface of the hydraulic cylinder 9.

When oil is supplied to the small oil chamber 17 and the large oil chamber 18 at the same time, the volume of the left small oil chamber 17 is the right oil chamber 18 so that the piston 20 moves to the left in FIG. It is formed smaller than the volume of).

In addition, 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 member 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 to the small diameter portion 20q fitted to the small oil chamber 17 and the large oil chamber 18. The elastic member 22 is formed on the large diameter portion 20r, the tapered inclined surface 20b formed on the outer peripheral 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. 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 7 clockwise in FIG. 2 is mounted, and a lower surface of the rod 35 is formed on the piston 20. The inclined surface is formed to be in close contact with the inclined surface 20b, and the rod 35 is in close contact with the inclined surface 20b formed at the piston 20 so that the piston 20 moves to the left side. The upper surface of the rod 35 extends to the lower surface of the base end 7a of the clamp 7 so as to protrude outward through the through hole 9a formed in the 9 so as to bias the clamp 7 clockwise. You are in contact.

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. Each of the hydraulic cylinders 9 is sealed by a plurality of fixing bolts 15, and the hydraulic cylinder 9 is integrally formed by the fixing bolts 28 to the flange portions 1b and 1c formed integrally with the mold fixing gripping apparatus 1. It is fixed.

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 ports 13a and 14a. The hydraulic hose coupling joint 27 is coupled to the coupling.

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. The outer circumferential surface of the c) is provided with a packing means 32a to prevent oil from leaking or flowing between the oil chambers 17 and 18, and the outer circumferential surface of the small diameter portion 20q of the piston 20 and the large diameter portion 20r. On the outer circumferential surface thereof, packing means 32a and 32b are provided so that oil does not leak or flow between the oil chambers 17 and 18.

On the other hand, the mold fixing gripping apparatus 1 is provided with a biasing portion 37 for biasing the clamp 7 counterclockwise. The bias portion 37 is composed of a coil spring 37a and a steel ball 37b which is provided at the tip of the coil spring 37a and abuts on the lower surface of the clamp 7.

Although the above three or four sets of mold fixing gripping apparatuses 1 are generally required to fix the upper or lower mold 100, the three types or four sets of mold fixing gripping apparatuses can be used to fix the mold ( The method of fixing 100) is the same, so only the operation of one set of mold holding gripping apparatus will be described.

First, the grip plate 11 and the mold fixing gripping apparatus 1 are held, and the template 3 on which the T-shaped engaging portion 1a formed integrally with the mold fixing gripping apparatus 1 is fixed to the injection machine. It is inserted into the T-shaped groove 3a of Fig. 1 and temporarily fixed in the four directions of the mold 100 between the template 3 and the grip portion 7b of the clamp 7 as shown in FIG.

Next, the hydraulic hose is connected to the joint 27 provided in the cover 13 and 14 attached to the hydraulic cylinder 9. In the above description, although not shown in the drawings, the hydraulic hose shown in the drawing connected to each mold fixing gripping device is pulled out of the oil tank by a single line, branched into eight lines, and coupled to the joint. The hydraulic hose connected to the joint and the oil tank is supplied to the large oil chamber 18 or the small oil chamber 17 by a solenoid valve not shown.

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 17 and a large amount of oil is supplied to the large hydraulic chamber 18, the piston 20 inserted 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 proximal end 7a of the clamp 7 upward.

Accordingly, since the clamp 7 rotates clockwise about the axis 5, the grip portion 7b of the clamp 7 clamps one surface of the mold 100 firmly toward the template 3. do. (As such, the upper or lower mold is fixed by using three or four sets of mold fixing gripping apparatuses in four directions of the mold 100).

As described above, when the mold 100 is fixed by the mold fixing gripping apparatus, the piston 20 is urged to the left in FIG. 2 by the elastic member 22 installed in the large oil chamber 18. Should remain 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 installed in 18 always biases the piston 20 toward the small oil chamber 17, the mold 100 clamped by the mold fixing gripping device 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 power is supplied through a power input unit (not shown), the oil in the large oil chamber 18 is recovered to the oil tank 40, and the small oil chamber 17 The piston 20 moves to the right in FIG. 2 by the oil pressure.

In other words, the oil stored in the oil chamber 17 smaller than the force that the elastic member 22 installed in the large oil chamber 18 pushes the piston 20 to the left causes the piston 20 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 7 rotates counterclockwise around the axis 5 by the biasing force of the biasing portion 37, and thus the rod 35. Since it is pressed by the lower surface of the base end portion (7a) of the clamp 7 is released from the mold 100 to release the clamp state, it can be replaced with a mold for manufacturing other products to be injected.

As described above, if the mold is fixed or replaced by the mold holding and holding device according to the present invention, the mold can be replaced accurately and quickly, and the mold can be fixed or replaced quickly and accurately, thereby improving the production rate of the injection machine. You can.

In addition, when the mold is fixed by the mold holding gripping apparatus, even if the hydraulic hose is broken or the power is interrupted during the operation of the injection molding machine, the piston 20 is made to be made of small oil by the elastic member 22 disposed in the large oil chamber 18. Since the state to be pushed toward the chamber 17 is maintained, the state of holding the mold 100 is maintained so that the mold 100 does not fall from the injection machine and there is no fear of a stable accident during operation.

However, the clamp of the mold holding gripping device described above has a grip portion stroke of only 8 mm. As a conventional technique, when a mold having various thicknesses is fixed to a template, a gap occurs when a metal plate having an appropriate thickness is applied to the gripping portion of the mold. Make sure it is firmly fixed.

Since the metal plate has to reflect a different thickness for each mold work, it is not permanent and has to be changed every time the mold work has a problem in that it is troublesome.

For this reason, there is a problem in that gripping work of a mold lost due to the use of a clamping part of a clamp or a metal plate that is padded to a mold without being attached or attached depending on the thickness of the mold is used.

According to Figs. 4 and 5 of 20-2002-0004332 filed by the present applicant to solve the above problems;

The gap adjusting member 41 applied to the mold fixing gripping apparatus 1 is perpendicular to the rod 35 of the hydraulic cylinder 9 so as to be rotationally adjusted by the wrench 40 on the proximal end 7a side of the clamp 7. The gap adjusting screw 44 is fixed to the screw groove 42 formed on the base end portion 7a side of the clamp 7 so as to be moved up and down.

The gap adjusting screw 44 is formed with a wrench groove 46 to insert the wrench 40 in the upper portion to allow convenient rotation adjustment by the wrench 40.

In addition, an indicator arrow 48 is formed on the entire surface of the proximal end 7a side of the clamp 7 on which the gap adjusting screw 44 is formed, and the indicator arrow 48 marks the mold height so that the mold height can be known. It is provided with the graduation body 50 formed.

The scale 50 is displayed as 50mm on the lower side, 45mm in the middle, 40mm on the upper side to accurately check the fixing to the thickness of the mold.

The convenience of adjustment is known by simply adjusting the gap between the grip part of the clamp according to the mold exchange of various thicknesses by simply rotating the gap adjusting screw of the gap adjusting member in the mold fixing gripping apparatus 1 described above.

However, although the gap adjusting screw supported in contact with the rod is adjusted by a wrench at the proximal end to allow the clamp to grip the mold, there is a problem that the thickness of the mold to be fixed is limited to the aforementioned thickness.

In addition, there is a problem in that a mold having a desired thickness cannot be gripped due to abrasion of the contact surface when used for a long time due to the pressure caused by the contact between the gap adjusting screw and the rod.

It is proposed in order to solve the problems of the prior art made as described above, the object of the present invention is to form a clamp to be installed in the mold of the press, the extruder or the injection molding machine in a structure in which the vertical gap can be adjusted within a predetermined range It is to provide a clamp shaft shaft displacement portion of the mold fixing gripping device that can be greatly extended and the fixing width of the mold.

The present invention to realize this

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, a clamp installed on the main body so as to be rotatable via a shaft to secure the mold to the template, and an elastic portion below the proximal end of the clamp. In a mold holding gripping apparatus comprising a hydraulic cylinder having a rod which is lifted by a piston that is moved forward and backward by the action of hydraulic pressure while being supported by a member, and a biasing portion that rotates the grip portion of the clamp counterclockwise. ,

A clamp shaft of the clamp carried by the attachment portion,

An axis hole formed by vertically drilling both support side plates such that the clamp shaft is assembled and the shaft center is displaced up and down;

Clamp shaft axis displacement of the mold fixing gripping device, characterized in that the configuration consisting of an adjustment screw which is screwed to the support side plate to adjust the rotation center of the clamp shaft by a wrench using a pressure plate interposed on the center vertical line of the shaft hole. To provide wealth.

The present invention uses a gap adjusting screw assembled on the clamp base end of the mold holding gripping device by adjusting the gap between the rod of the hydraulic cylinder and the base end of the clamp, so that the gap is variable even if the mold thickness of the clamp is changed. It is a technology that enhances the reliability of the technology by the gap adjusting member that adjusts only the adjusting screw to fix the mold accurately by the holding part.

1 is a perspective view showing a state in which a mold holding gripping device according to the prior art gripping the mold.

Figure 2 is a side cross-sectional view showing the mold fixing gripping apparatus of Figure 1;

Figure 3 is a side view of the mold holding gripping apparatus of Figure 1;

Figure 4 shows that the gap adjustment screw is applied to the proximal end in the prior art.

5 is a view showing a state of the clamp according to the action of the gap adjusting screw of FIG.

Figure 6 is a perspective view showing that the clamp shaft shaft displacement portion of the mold fixing gripping apparatus according to the present invention is applied.

Figure 7 shows the action a, b, c of the shaft axis displacement portion of the clamp shaft according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: Mold fixing gripping device 5: Axle

7: clamp 7a: proximal end

9: hydraulic cylinder 10: support side plate

20: piston 22: elastic member

35: 40 load: Wrench

C: Axis center 51: Displacement part

52: shaft ball 54: pressure plate

56: adjusting screw

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

6 is a perspective view showing that the clamp shaft shaft center displacement portion of the mold fixing gripping apparatus according to the present invention is applied, Figure 7 is a view showing the action a, b, c of the shaft shaft displacement portion of the clamp shaft according to the present invention.

The same reference numerals denote the same parts as in the prior art.

The mold holding gripping apparatus 1 forms a T-shaped coupling portion 1a that is inserted into and fixed to the T-shaped groove 3a formed in the template of the injection molding machine, and is assembled to the support side plate 10 by the clamp shaft 5. Clamps (7) rotatably installed to fix the mold to the template, and the piston (20) forward and backward by the action of hydraulic pressure while being supported by the elastic member 22 in the lower portion of the base end portion (7a) side of the clamp (7) The hydraulic cylinder 9 provided with the rod 35 which raises and lowers by this, and the biasing part 7b which rotates the holding part 7b of the said clamp 7 counterclockwise are comprised.

The clamp shaft shaft center displacement part 51 of the mold fixing gripping apparatus is formed by drilling the shaft center C of the clamp shaft 5 vertically on both supporting side plates 10 such that the shaft center C of the clamp shaft 5 is vertically displaced. And the adjusting screw 56 which is fastened to the support side plate 10 which is on the center vertical line of the shaft hole 52 so as to variably adjust the position by adjusting the screw center of the clamp shaft 5. It is made up of the included configuration.

The adjusting screw 56 is adjusted by the wrench 40, and the lower end thereof has a pressure plate 54 to facilitate contact with the clamp shaft 5.

The shaft hole 52 is formed in a predetermined length on a vertical line, is formed in consideration of the thickness to be gripped according to the use, is not limited to a specific length, it can be variously changed depending on the design.

And the shaft hole 52 is formed in the both support side plates 10, and the center of gravity C displacement of the clamp 7 can be reliably and accurately.

The pressure plate 54 is provided on the clamp shaft 5 so as to easily transmit the action of the bearing force on the adjusting screw 56.

Referring to the operation of the present invention made as described above, the shaft shaft displacement portion 51 of the clamp shaft 5, which is applied to the mold fixing gripping apparatus 1, the clamp shaft 5 of the clamp 7 is the support side plate ( The shaft center is assembled to the shaft hole 52 of 10) so as to be displaceable up and down.

The adjusting screw 56 adjusted by the wrench 40 is screwed to the support side plates 10 on both sides of the center line perpendicular to the shaft hole 52.

The clamp shaft 5 axis center C of the mold fixing gripping apparatus 1, the displacement portion 51 of the clamp shaft (5) shaft center (a) when the thickness of the mold 100 to be gripped is a in FIG. C) When the adjusting screw 56 is adjusted using the wrench 40 to be positioned at the lower end of the shaft hole 52, the mold is gripped and fixed while pressing the elastic force of the auxiliary part 37.

When the thickness of the mold is b in FIG. 5, the adjusting screw 56 is adjusted by the wrench 40 so that the clamp center 5 shaft center C maintains a slight clearance from the lower end of the shaft hole 52. When lifted slightly to adjust the position by the wrench 40, the clamp 7 facilitates the grip of the mold having a slight thickness in the slight floating state by the elastic force of the portion 37.

In addition, when the thickness of the mold is c in FIG. 5, the adjusting screw 56 is adjusted by the wrench 40 so that the clamp shaft 5 shaft center C maintains a slight clearance from the lower end of the shaft hole 52. When slightly raised to adjust and position with the wrench 40, the clamp 7 facilitates the grip of the mold with a little thickness in the slightly floating state by the elastic force of the bias portion 37.

As described above, when the adjustment screw 56 slightly adjusts the wrench 40 according to the thickness change of the mold 100, the posture change of the clamp 7 and the displacement part 51 can be known. When the oil is supplied to the hydraulic cylinder 9 of the mold fixing gripping apparatus 1 to generate hydraulic pressure.

When the piston 20 is pushed to the left side, the rod 35 pushes the proximal end 7a side upward to firmly hold the grip portion 7b of the clamp 7 to fix the mold.

That is, the rod 35 of the hydraulic cylinder 9 presses the bottom surface of the base end portion 7a side of the clamp 7 upwards, so that the grip portion 7b appropriately responds to gripping molds of various thicknesses. .

And the shaft hole 52 and the adjustment screw 56 of the both side support side plate 10 to enable the variable adjustment of the shaft center (C) of the clamp shaft (5), which determines the grippable thickness of the gripping portion (7b) By having the axial center displacement part 51 provided, the holding area of the mold fixing gripping apparatus 1 is enlarged, and the reliability of the technology is achieved through accurate fixing of the mold.

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, and for example, the mold fixing gripping of the present invention is also applied to a template such as a press extruder. The mold 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 belongs. Of course, the design can be changed by those who have it.

It is a technology to cope with the thickness change of the clamping part gap of the clamp according to the mold fixing gripping device as described in detail above by changing the thickness of the clamp shaft through the clamp axis axis displacement part, and to change the thickness of the mold to be gripped. The gap adjustment is also convenient and easy to adjust simply by rotating the adjusting screw by the wrench.

In addition, it is not necessary to prepare a metal plate interposed to overcome the gap difference caused by the change in thickness when the mold is clamped to the clamping part of the clamp. It is an industrially useful design in the field of mold making.

Claims (1)

Forms a T-shaped coupling portion 1a inserted into and fixed to the T-shaped groove 3a formed in the template of the injection molding machine, and clamps on both supporting side plates 10 to fix the mold to the template on the coupling portion 1a. The clamp 7 assembled by the shaft 5 and the piston 20 which is moved forward and backward by the action of hydraulic pressure while being supported by the elastic member 22 on the lower side of the base end portion 7a of the clamp 7 are lifted up and down. In the mold holding gripping apparatus comprising a hydraulic cylinder (9) having a rod (35) to be rotated, and a detail portion (7b) for rotating the gripping portion (7b) of the clamp (7) counterclockwise, A shaft hole 52 formed by drilling in a vertical state on both supporting side plates 10 such that the shaft center C of the clamp shaft 5 is displaced up and down; A configuration including an adjusting screw 56 fastened to the support side plate 10, which is on the center vertical line of the shaft-length hole 52, to adjust the position of the clamp center 5 variably by adding or subtracting screws. Clamp shaft shaft center displacement portion of the mold holding gripping device characterized in that consisting of.