KR101147641B1 - Signing of the mold injection molding equipment. - Google Patents

Abstract

The present invention relates to a mold clamping device for quickly mounting or detaching each mold mounted on a fixed die and a movable die constituting an injection molding machine, and more particularly, a permanent magnet on a mold fixed surface of the fixed die and a movable die. And a magnet panel having a core in which the permanent magnet is wound and arranged, and a mold clamping device of an injection molding machine, which is equipped with a magnet panel which amplifies a magnetic field by a power source applied to the core and fixes the mold. Regarding,
A mold die 1 composed of a movable die 2 installed to slide by a tie-bar and a hydraulic cylinder, and a fixed die 3 provided at a point corresponding to the movable die 2; And a clamping device provided with a magnet plate 10 as a fixing means for fixing the mold 4 including the movable mold 4a and the fixed mold 4b to the mold die 1;
In the injection molding machine consisting of; a melter having a nozzle 40 for melting and supplying the injection raw material to the fixed mold (4b),
The front portion of the mold die (1) is provided with a receiving portion (5) in which the magnetic plate 10 is accommodated,
The magnetic plate 10 includes a magnetic conductor 11 vertically and horizontally mounted on the front surface of the main body 10 ', a permanent magnet 12 in close contact with the rear surface of the magnetic conductor 11, and the permanent magnet ( A core 13 wound around 12 and another permanent magnet 14 mounted diagonally in the side portion of the magnetic conductor 11, and each of the magnetic conductors 11 is made of synthetic resin, foam, silicone, etc. The nonconductive object 15 is filled.
The non-conductive material 15, which is filled and fixed between the magnetic conductors 11 on the front surface of the magnetic plate 10, has a shape of the recessed groove 16 to a depth of 0.3 to 0.5 mm from the surface of the magnetic conductor 11. It provides a mold clamping device of the injection molding machine formed by forming the discharge line 17 to reduce the work time for the removal / attachment of the mold, and reduce the installation error that can occur between the two molds generated during mounting To ensure that

Description

Signing of the mold injection molding equipment.

The present invention relates to a mold clamping device for quickly mounting or detaching each mold mounted on a fixed die and a movable die constituting an injection molding machine, and more particularly, a permanent magnet on a mold fixed surface of the fixed die and a movable die. And a magnet panel in which the core is wound around the permanent magnet, the magnet panel being amplified by a power source applied to the core so that the mold can be fixed to the mold clamping device of the injection molding machine. will be.

In general, an injection molding machine is classified into a fixed die for mounting a fixed mold and a movable die for mounting a movable mold, and the fixed mold is connected to a nozzle to continuously supply a synthetic resin solution, which is an injection material, and moves forward and backward to fix the fixed mold. And a movable die and a movable mold, each of which is provided with a conveying means for injecting and molding the product.

As a means for mounting the fixed mold and the movable mold to the fixed die and the movable die, it is usually fastened and fixed by means of screwing using a fastening bolt.

The conventional fixing means of the mold is to cause the following problems.

First, the loosening of the assembly screw occurs due to the vibration caused by the repeated operation of the fixed mold, which causes the center point of the fixed mold and the movable mold to shift.

Second, mold breakage and injection device failure due to collision of movable mold and fixed mold due to loosening of assembly screw.

Third, there is a delay in working time due to frequent checking of the coupling state of molds, and a sharp decrease in productivity.

As a conventional prior art proposed in order to solve the above problems, Utility Model Publication No. 1995-0006151 is proposed.

According to the above-described design, at each corner of the template body, fasteners of the same diameter guided on the tie-bars of the molding machine are formed, and screw grooves having a diameter of a size suitable for mounting various molds therein are at least. It is formed by several dozen or more.

The fasteners and screw grooves of the template body are processed into T-slots according to international standards to make them applicable not only in Korea, but also in Europe, the United States, and Japan. Its outer dimensions are manufactured to the same diameter so as to be applicable to the same template.

However, even in the case of the conventional template, even if the fastener and the screw groove of the international standard are set in the template body, the mold is frequently replaced according to the product type. It is easily damaged by imbalance of fixing force.

As a means to solve this problem, a fastening device using a permanent magnet is proposed as a similar technology with a magnet pallet for fixing a steel workpiece machined by a machine tool having a horizontal tool shaft of Patent Registration No. 10-0626889. It is.

The above-described prior art has a magnet pallet for fixing a steel workpiece processed by a machine tool having a horizontal axis, and has a base plate to move the steel workpiece to be machined to the work area and to remove the machined workpiece into the empty area. The base plate is constructed across the bed of the machine tool, and also forms a vertical projecting side of the parallelepiped extending upwardly from the base plate, and the base plate and the projecting side machine a single ferromagnetic monolithic block or block of steel. To provide a magnetic pallet formed as a single body,

On the vertical transverse surface of the protruding side a rectangular groove of the protruding side is provided, forming a transverse wall and a rear part (in addition to the intermediate wall extending vertically and horizontally), wherein the groove is arranged in a matrix and forms a vertical magnet fixed surface. To accommodate a plurality of magnetic conductors,

The recess is formed by chip-generating a ferromagnetic monolithic block forming the protruding side of the magnet pallet and the base plate.

Magnetic magnetic conductors are fixed in the recesses of the protruding side, and the magnetic magnetic conductors are composed of parallel hexahedrons with a horizontal axis orthogonal to the transverse surface of the protruding side, and end bases of the magnetic magnetic conductors are formed in a square with respect to the axis. do.

A switchable first permanent magnet is arranged between the inner base of each magnetic conductor and the rear of the ferromagnetic crown and has a horizontal magnetic polarity axis, the polar axis having a direction orthogonal to the inner base of the magnetic conductor, the first permanent magnet The magnet is surrounded by an electric coil and configured to supply current into the coil in one direction or the other in order to change the magnetic pole direction of the first permanent magnet. The steel workpiece is formed by a magnetic field formed on the surface of the magnet pallet. To be attached.

The means for fixing the steel workpiece using the magnetic pallet is to provide the effect of requesting or separating the steel workpiece in a short time.

Despite providing the above characteristics, the conventional magnet pallet could not be suitably used in an injection molding machine.

The magnet pallet steals the principle of amplifying the magnetic field by causing the polarity change by the permanent magnet and the core wound around the permanent magnet, and it is difficult to install and maintain a mold having an extremely heavy weight. This is because the slip phenomenon occurs due to the compressed air that is momentarily compressed between the rear attachment surface of the mold and the front surface of the fixed die and the movable die at the time of attachment, and it is difficult to accurately attach the mold.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a means for attaching a mold at a stable and accurate point by preventing a compression phenomenon formed between the magnet pallet and the mold.

It is another object of the present invention to provide a mounting means of a magnet pallet which enables installation by simple modification to an existing injection molding machine by minimizing the width of the magnet pallet mounted on the surfaces of the fixed die and the movable die of the injection molding machine. For other purposes.

The present invention for solving the above problems, the magnet plate is mounted on the existing fixed die and the movable die, provided with a receiving portion that can be embedded in the fixed die and the movable die, the magnetic plate is embedded in the receiving portion By doing so, it does not affect the overall length of the existing injection molding machine.

In addition, by forming a compressed air discharge line connected to the surface of the magnet plate in the vertical and horizontal direction, the compressed air generated at the moment of mounting the mold on the magnet plate mounted on the fixed die and the movable die to be naturally discharged to the outside This allows for faster and more error-free mounting.

The mold clamping apparatus of the present invention as described above minimizes the mounting time separately mounted on the movable die and the fixed die, thereby maximizing the work efficiency according to the detachment / attachment of the mold, and each mold mounted on the fixed die and the movable die without errors. It is to be mounted to have the effect of eliminating the breakage of the mold and the generation of defective injection molding.

Figure 1 is a front view of a conventional injection molding machine to which the present invention is applied, Figure 2 is an exploded perspective view showing the main part of the present invention, Figure 3 is a cross-sectional view showing the configuration of the main part of the present invention, Figure 4 is a die die to which the present invention is applied Front view of the engaged state of the magnet plate.

In describing the present invention, the injection molding machine is provided with a fixed die on which the fixed mold is mounted and a movable die on which the movable mold is mounted, respectively. The present invention is installed to have the same configuration on the fixed die and the movable die, respectively. For convenience, the die and die are collectively described as a means for comprehensively expressing the fixed die and the movable die.

A movable die 2 slidably mounted to a tie-bar 20 and installed to slide by a hydraulic cylinder 30, and a fixed die installed at a point corresponding to the movable die 2; A die 1 composed of 3);

A mold clamping device having a magnet plate 10 as a fixing means for fixing a mold 4 composed of a movable mold 4a and a fixed mold 4b to the mold die 1;

In the injection molding machine consisting of; a melter having a nozzle 40 for melting and supplying the injection raw material to the fixed mold (4b),

In the front portion of the die die (1) is provided with a receiving portion (5) in which the magnetic plate 10 is to be configured to couple and fix the magnet plate 10,

The magnetic plate 10 includes a magnetic conductor 11 vertically and horizontally mounted on the front surface of the main body 10 ', a permanent magnet 12 in close contact with the rear surface of the magnetic conductor 11, and the permanent magnet ( A core 13 wound around 12 and another permanent magnet 14 mounted diagonally in the side portion of the magnetic conductor 11, and each of the magnetic conductors 11 is made of synthetic resin, foam, silicone, etc. The nonconductive object 15 is filled.

The non-conductive material 15, which is filled and fixed between the magnetic conductors 11 on the front surface of the magnetic plate 10, has a shape of the recessed groove 16 to a depth of 0.3 to 0.5 mm from the surface of the magnetic conductor 11. Formed to form a discharge line (17).

The accommodating part 5 formed in the said die | dye 1 is formed so that it may become horizontal with the upper surface of the die die 1, when the magnet plate 10 is inserted and fixed to this accommodating part 5, Means for fixing the magnet plate 10 to the portion 5 is fixed using a conventional fixing bolt, in addition to this various fixing means may be proposed.

In addition, the discharge line 17 formed in the magnet plate 10 may be formed by forming a recessed groove in the surface of the magnetic conductor 11.

Outside the magnet plate 10 is provided with a controller (S) for controlling the supply of electricity to the core (13).

The center portion of the magnet plate 10 is formed with a center hole 18 for attaching the mold in place, and the center hole 18 of the magnet plate attached to the fixed die 3 to communicate with the nozzle 40. Configure.

One center hole 18 is basically formed in the center, but a plurality of center holes 18 may be formed in a vertical direction or a diagonal direction with respect to the center hole 18 of the central part.

Referring to the operating state of the present invention configured as described above,

First, when the hydraulic cylinder 30 connected to the movable die 2 of the injection molding machine is operated and retracted, it is slid on the tie-bar 20 and retracted to the position of the previous step of injection molding.

Subsequently, the mold 4 is mounted on the front surface of the magnet plate 10 fixed in the state of being embedded in the surface receiving portion 5 of the fixed die 3, and the movable mold 4a and the fixed mold 4b are coupled to each other. After transferring the mold 4 in a closed state to the front portion of the mold die 1 through a transfer means such as a hoist, any one die; For example, by inserting a center pin (not shown) protruding from the rear portion of the fixing mold 4b into the center center hole 18 of the magnet plate 10 fixed to the fixing die 3 to check the proper position.

When power is applied to the core 13 embedded in the magnet plate 10 through the controller S in the appropriate position is confirmed, the polarity of the permanent magnet 12 is converted to extend the range of the magnetic field, The fixed mold 4b is attached to the front of the magnet plate 10 by the strong magnetic force of the extended magnetic field.

The power is applied to the magnet plate 10 and the attachment technique through the expansion of the magnetic field through the polarity change is a known technique and a detailed description thereof will be omitted.

Due to the power applied to the core 13 of the magnetic plate 10, the mold 4 is instantaneously attached by a strong magnetic force, which is present between the rear surface of the mold 4 and the front surface of the magnet plate 10. The air is compressed instantly.

The compressed air to be compressed is induced to be discharged to the outside through the inlet groove 16 of the discharge line 17 formed in the magnet plate 10, thereby eliminating the slip phenomenon caused by the compressed air.

That is, the air existing between the magnet plate 10 and the mold 4 is discharged to the outside along the recessed groove 16 of the discharge line 17 in the step before extruded by the mold 4 to generate the compressed air. It destroys the moment itself.

In the present invention, the magnetic plate 10 has a considerable thickness by a plurality of permanent magnets 12, magnetic conductors 11 and permanent magnets 14 arranged in the diagonal direction of the magnetic conductors 11, respectively. The gap between the movable die 2 and the fixed die 3 of the injection molding machine due to the thickness of the magnet plate 10 is reduced, and the injection work is performed by mounting and operating the mold 4 in the reduced space. The maximum working space of the movable mold (4a) and the stationary mold (4b) is reduced, which leads to a considerable difficulty in taking out the molding, according to the present invention, the magnet plate 10 is a die die Since it is mounted in a state embedded in the receiving portion (5) formed on the front of (1) will not affect the operating space of the fixed die 3 and the movable die (2).

As a means for preventing slip phenomenon due to compressed air at the moment when the mold 4 is attached to the magnet plate 10 by magnetic force, a yaw using the non-conductive object 15 inevitably provided in the magnet plate 10 is used. Although the inlet line 16 is vertically and horizontally connected to the discharge line 17, the discharge line 17 may be formed on the surface of the magnetic conductor 11 separately, and the discharge line 17 may be recessed or Even if configured as a protruding type it will be possible to obtain the same effect of preventing the slip phenomenon.

The present invention can be applied to the injection molding machine that is produced and used in the existing, it is possible to switch to the injection molding machine to which the present invention is applied through a simple replacement of the mold die formed with the receiving portion.

One; Mold die, 2; Movable die, 3; Fixed die, 4; Mold, 4a; Movable mold, 4b; Fixed mold, 5; Receptacle, 10; Magnetic plate, 11; Magnetic conductors, 12, 14; Permanent magnet, 13; Core, 20; Tie-bar, 30; Inlet cylinder, 40; Nozzle

Claims (3)

A movable die 2 slidably mounted to a tie-bar 20 and installed to slide by a hydraulic cylinder 30, and a fixed die installed at a point corresponding to the movable die 2; A die 1 composed of 3); and,
A mold clamping device having a magnet plate 10 as a fixing means for fixing a mold 4 composed of a movable mold 4a and a fixed mold 4b to the mold die 1;
In the mold clamping apparatus of the injection molding machine consisting of; a melting device having a nozzle 40 for melting and supplying the injection raw material to the fixed mold (4b),
In the front portion of the die die (1) is formed in the receiving portion 5 for receiving the magnet plate 10,
The magnetic plate 10 includes a magnetic conductor 11 vertically and horizontally mounted on the front surface of the main body 10 ', a permanent magnet 12 in close contact with the rear surface of the magnetic conductor 11, and the permanent magnet ( A core 13 wound around 12 and another permanent magnet 14 mounted diagonally in the side portion of the magnetic conductor 11, and the non-conductive material 15 is interposed between the respective magnetic conductors 11. By filling
Is provided with a controller (S) for applying power to the core 13,
The non-conductive material 15, which is filled and fixed between the magnetic conductors 11 on the front surface of the magnetic plate 10, forms the recessed grooves 16 to a depth of 0.2 to 0.5 mm from the surface of the magnetic conductor 11. The mold clamping device of the injection molding machine, characterized in that to form a discharge line (17).
The method of claim 1,
The center of the magnet plate 10, the center of the hole 18 is formed by forming a recess in the mold clamping device of the injection molding machine, characterized in that the configuration.
The method of claim 1,
The non-conductive material 15 is a mold fastening device of the injection molding machine, characterized in that any one of a synthetic resin foam, silicone.

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