KR101335037B1 - Half-nut clamping apparatus for injection molding machine - Google Patents

Abstract

The present invention relates to a half nut fastening mechanism of an injection molding machine. The half nut fastening mechanism of the present invention includes a left half nut 100 composed of first and second split nuts 110 and 120; A right half nut 200 composed of first and second split nuts 210 and 220; The first connector 300 connecting the second and first split nuts 120 and 210 of the left and right half nuts 100 and 200 and the first and second split nuts 110 and 100 of the left and right half nuts 100. A second connector 400 for connecting 220; A rotary pulley 510 disposed between the left half nut 100 and the right half nut 200; First and second connection links 600 and 600a for connecting the rotary pulley 510 and the left and right second split nuts 120 and 220; And a driving source for driving the rotary pulley 510. In the present invention, the fastening and releasing of both half nuts 100 and 200 are simultaneously performed by the rotation pulley 510 and the connection link.

Description

Half nut fastening mechanism of injection molding machine {HALF-NUT CLAMPING APPARATUS FOR INJECTION MOLDING MACHINE}

The present invention relates to a half nut fastening mechanism of an injection molding machine, and more particularly, to a half nut fastening mechanism of an injection molding machine capable of simultaneously fastening two left and right half nuts by a mechanical linkage between one driving source and a link device. It is about.

Referring to FIG. 1, a general injection molding machine includes a pair of molds 11 and 21, in which a cavity is formed in accordance with the shape of an article to be manufactured to form a mold and open a mold, respectively. A tie bar 30 and a movable bar 20 to guide the movable plate 20 so as to be slidable, and the movable plate 20 to which the stationary plate 10 and the movable plate 20 to which the molds 11 and 21 of the present invention are mounted. And a half nut 50 for locking or releasing the movement of the movable die 20 by engaging or releasing the transfer device 40 and the tie bar 30 to move along the 30.

Such an injection molding machine injects molten resin into the cavity of the molds 11 and 21 in a state in which the molds 11 and 21 are joined, and after the injected molten resin solidifies, molds are removed to take out the finished molded product.

Here, the tie bar 30 is installed in four places so that the upper, lower, left, right of the movable die 20 is fitted, the half nut 50 locks or releases the four tie bars 30.

Each half nut 50 is divided into two split nuts, and the inner surface is provided with a tooth which can engage with the teeth formed in the tie bar 30, and in the radial direction of the tie bar 30 by the fastening device. By moving inward or outward by engaging or releasing the teeth formed on the tie bar 30, the state in which the movable template 20 can be locked and restrained at the mating position or the unlocking of the movable template 20 can be moved to the mold opening position Be sure to

Such a drive mechanism of the half nut 50 has a complicated fastening device (for example, a hydraulic cylinder device or other mechanism device) for operating the half nut 50 composed of two split nuts. Since each 30) is installed separately, there is an excessive cost for installation and maintenance.

In addition, due to frequent failure of each fastening device, a phenomenon in which a fastening operation or an unwinding operation is incompletely performed in some of the four hydraulic cylinder devices may occur, thereby frequently stopping the process.

In addition, the conventional fastening device mainly uses a hydraulic cylinder device, the hydraulic cylinder device has a characteristic that the piston rod and the cylinder is reacted with each other to move the two split nuts in the opposite direction, until the piston rod or Since only the split nut connected to one of the cylinders moves and the split nut connected to the other piston rod or cylinder does not move until the split nut touches the tie bar and reacts, There is a problem that the injection equipment is frequently stopped due to the problem that the half nut tightening time is delayed and the engagement is misaligned.

Conventionally, as a half nut fastening mechanism, an abnormal fastening prevention device disclosed in Korean Laid-Open Patent Publication No. 10-2004-0084319 is known, but this improves the bite of the half nut and the tie bar with the existing fastening device intact. It is not just a device that adds, it is not a fundamental solution to the problem of using a separate hydraulic drive device, there is a problem that the device is more complicated.

In addition, as a conventional half nut fastening mechanism, a simultaneous fastening device disclosed in Korean Patent Laid-Open No. 10-2010-0045976 is known. This is a device for fastening both half nuts at the same time with one drive source, but the connection link structure of the drive source and the half nut is complicated. In addition, the direction of movement of the cylinder and the cross head and the direction of movement of the half nut are at right angles, so that the movement of the arm connecting the cross head and the half nut during the release operation cannot be completely switched to the movement of pulling the half nut. There is a problem that is made incompletely, there is a disadvantage that the half nut is not lifted in the axial direction, the movement in the left and right directions can not be made smoothly.

Republic of Korea Publication No. 10-2004-0084319 Republic of Korea Patent Publication No. 10-2010-0045976

The present invention is to solve the conventional problems as described above, an object of the present invention is a half nut fastening mechanism of the injection molding machine capable of simultaneously engaging and releasing the left and right two half nuts by a combination of one drive source and link device. To provide.

In order to achieve the above object, a half nut fastening mechanism of an injection molding machine according to one direction of the present invention includes a left and a right half nut composed of first and second split nuts; A first connector connecting the second and first split nuts of the left and right half nuts and a second connector connecting the first and second split nuts of the left and right half nuts; A rotary pulley disposed between the left half nut and the right half nut; First and second connection links connecting the rotatable pulley and the left and right second split nuts; And a driving source for driving the rotary pulley.

The half nut fastening mechanism of the injection molding machine according to another direction of the present invention is divided into a first split nut and a second split nut, and the left half is provided on both sides of the movable plate in a state in which the tie bar can be slid in the radial direction. Nut and right half nut; A first connector connecting the second split nut of the left half nut and the first split nut of the right half nut; A second connector integrally connecting the first split nut of the left half nut and the second split nut of the right half nut 200; A rotational pulley disposed at a center point between the left half nut and the right half nut in a direction parallel to the tie bar and installed in the bidirectional rotation by the driving source; And the second divided nut of the rotary pulley and the second divided nut of the left half nut and the second split nut of the right half nut, respectively, to linearly reciprocate radially in and out of the tie bar by bidirectional angular movement of the rotary pulley. And first and second connection links connecting the nuts, respectively.

In one embodiment, the first and second connection links comprise: a crank extending radially outward from both radial points that are symmetrical about the central axis of the rotatable pulley; And a connecting rod hingedly connecting both cranks to the second split nut of the left half nut and the second split nut of the right half nut.

In addition, the second split nut of the left half nut and the second split nut of the right half nut are equipped with a connection block extending free end toward the rotary pulley, and the free end of the connecting rod connected to the crank is connected to the connection block. Is hinged to.

In addition, the rotation pulley is rotatably installed on a central axis fixed to the movable template, the drive source and the rotation pulley is connected to the rotary link to make the rotation pulley bidirectional angular movement by the bidirectional angular movement of the drive source.

In this case, the drive source may be configured by any one of a motor device, a hydraulic drive device, or a pneumatic drive device.

In one embodiment, the rotary link comprises: a first arm angularly bidirectionally driven by a drive source; A second arm extending radially outward at an outer circumference of the rotating pulley; And an intermediate link connecting the first arm and the second arm.

Here, the drive source may be configured by a motor, and the first arm may be configured by installing a rotational movement center on an output shaft of the motor.

Further, the drive source may be constituted by a hydraulic cylinder device, and the end actuating portion of the hydraulic cylinder device may be configured to operate the first arm.

According to the half nut fastening mechanism of the injection molding machine according to the present invention, since both half nuts operate mechanically at the same time by linking one drive source and a simple link structure, the driving mechanism can be simplified and the equipment cost can be reduced. The half nut tightening time can be shortened by simultaneously tightening and releasing the half nuts, thus contributing to productivity.

In addition, since the two split nuts of the half nut operate simultaneously without time difference, a phenomenon such as a fastening delay or a poor engagement is prevented.

1 is a view showing a typical injection molding machine.
2 is a perspective view showing an installation state of a half nut fastening mechanism according to the present invention.
Figure 3 is a perspective view showing the configuration of only the half nut fastening mechanism according to the present invention.
4 is a front view of a half nut fastening mechanism according to the present invention.
5 is a simplified view for explaining the fastening state of the half nut fastening mechanism according to the present invention.
6 is a simplified view for explaining the release state of the half nut fastening mechanism according to the present invention.

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

Figures 2 to 4 show a half nut fastening mechanism according to the present invention, Figure 2 is a perspective view showing a state installed in the movable die, Figure 3 is a perspective view showing the configuration of the half nut fastening mechanism only, 4 is a front view of the half nut fastening mechanism.

As shown in Figures 2 to 4, the half nut fastening mechanism of the injection molding machine according to the present invention, a tie bar between the left half nut 100 and the right half nut 200 disposed on both sides of the movable die plate 20; A mechanism for locking or releasing the movement of the movable die 20 by simultaneously engaging or releasing with (31) and (32). In the present specification and claims, for the sake of convenience of explanation, the directions are set to 'left' and 'right', but the mechanism for fastening the half nuts of the 'upper' and 'lower' is performed in the same manner.

In the half nut fastening mechanism of the present invention, the left half nut 100 and the right half nut 200 are formed in the form of being divided into two split nuts 110, 120, 210, and 220. The guide block 22 formed in 20 is installed in a state capable of sliding in the radial direction of the tie bars 31 and 32. In the accompanying drawings, the guide block 22 is shown as being installed only at the bottom of the half nut 100, 200, the same type of thing is also installed at the top of the half nut 100, 200.

Specifically, the left half nut 100 is divided into an outer first split nut 110 and an inner second split nut 120, and the right half nut 200 is an outer first split nut ( 210 and the inner second split nut 220. The left half nut 100 has a movement in which the first split nut 110 and the second split nut 120 are narrowed or opened toward the tie bar 31. The right half nut 200 has a movement in which the first split nut 210 and the second split nut 220 are narrowed or opened toward the tie bar 32.

The second split nut 110 of the left half nut 100 and the first split nut 210 of the right half nut 200 are integrally connected to each other by the first connector 300, and the second connector 400 is integrally connected to the second split nut 110 of the left half nut 100. As a result, the first split nut 110 of the left half nut 100 and the second split nut 220 of the right half nut 200 are integrally connected to each other.

The first split nut 110 of the left half nut 100 and the second split nut 220 of the right half nut 200 are split nuts disposed on the left side of both half nuts 100 and 200, respectively. Since the second split nut 120 of the half nut 100 and the first split nut 210 of the right half nut 200 are split nuts disposed on the right side of both half nuts 100 and 200, The split nuts are connected together and the split nuts on the right are connected together.

The connection state of the first connector 300 and the second connector 400 is well illustrated in FIG. 4. That is, the first connector 300 has one end screwed into the second split nut 120 of the left half nut 100 and an opposite end formed in the second split nut 220 of the right half nut 200. After passing through 222, the first split nut 210 is fastened to the lock nut 310. In addition, the second connector 400 has one end screwed into the second split nut 200 of the right half nut 200 and an opposite end formed in the second split nut 120 of the left half nut 100. After passing through the 122, the first split nut 110 is fastened to the lock nut 410.

Next, at the center of the left half nut 100 and the right half nut 200, the rotary pulley 510 is disposed in the direction in which the tie bars 31 and 32 and the central axis line are parallel to each other. The rotary pulley 510 rotates in both directions (clockwise and counterclockwise) by the drive source 700.

The rotary pulley 510 and the two half nuts 100 and 200 are connected by the first and second connection links 600 and 600a so as to linearly reciprocate radially in and out of the radial bars of the tie bars 31 and 32. do. That is, the first and second connection links 600 and 600a are respectively divided by the second split nut 120 and the right half of the left half nut 100 by bidirectional rotation (angular motion) of the rotary pulley 510. The second split nut 220 of the nut 200 is pulled to the center or pushed outward.

The first and second connection links 600 and 600a may include cranks 610 and 610a which extend radially outward from both radial points that are symmetrical about the central axis of the rotary pulley 510, and both sides. Connecting rods 620 and 620a hinged to the second split nut 120 of the left half nut 100 and the second split nut 220 of the right half nut 200. It includes. As the cranks 610 and 610a are angularly moved in the circumferential direction by bidirectional rotation (angular motion) of the rotary pulley 510, the connecting rods 620 and 620a are second split nuts 120 and 220 on both sides. Push or pull, the second split nut 120, 220 is linear reciprocating movement along the guide block (22).

For easy connection of the connecting rods 620, 620a and the second split nuts 120, 220, the second split nuts 120, 220 have free ends extending toward the rotary pulley 510. By mounting the blocks 630 and 630a, the free ends of the connecting rods 620 and 620a may be hinged to the connection blocks 630 and 630a.

The cranks 610 and 610a and the connecting rods 620 and 620a are hinged by hinge shafts 612 and 612a, and the connecting rods 620 and 620a and the connecting blocks 630 and 630a are hinged. It is hinged by pins 622 and 622a.

The rotary pulley 510 may be directly driven by a motor or a hydraulic drive source.

In this embodiment, as another example, the rotation pulley 510 is bidirectional by the movement of the rotation link 800 via a four-link link between the driving source 700 and the rotation pulley 510. Rotational movement (angular movement).

In this case, the rotary pulley 510 is rotatably installed on the central shaft 500 fixed to the movable template 20 by supporting a bearing or a bush. A flange 502 is formed at the tip of the central shaft 500 to prevent axial deviation of the rotation pulley 510.

The rotary link 800 includes a first arm 810 angularly bidirectionally driven by the driving source 700, a second arm 820 extending radially outwardly on the outer circumference of the rotary pulley 510, and a first arm 820. And an intermediate link 830 connecting the arm 810 and the second arm 820.

The drive source 700 is preferably made of a bi-directional rotatable step motor, in which case the first arm 810 is provided with a rotational movement center on the output shaft 720 rotated by the drive source 700. It is a rotation axis of the drive source 700 of the output shaft 720 or an output shaft of the reducer 710.

Unlike the embodiment shown in the drawing, when the drive source 700 uses a hydraulic or pneumatic cylinder or a device having other mechanical mechanism, the center of rotation of the first arm 810 is moved from the movable template 20. To the first arm 810 and rotatably coupled to the piston or hydraulic end of the hydraulic mechanism.

The present invention moves the second split nuts 120 and 220 of the left and right half nuts 100 and 200 simultaneously in opposite directions by rotating in one direction or the opposite direction of the rotary pulley 510, The first split nuts 110 and 210 of the opposite side connected to each other are also simultaneously moved in opposite directions so that both half nuts 100 and 200 may be fastened and released at the same time.

FIG. 5 and FIG. 6 schematically show the fastening and disengaging states of the half nut fastening mechanism, respectively.

First, referring to FIG. 5, when the output shaft 720 of the driving source rotates in one direction (clockwise in the drawing), the first arm 810 of the rotary link 800 rotates to push the intermediate link 830. The intermediate link 830 rotates the second arm 820 counterclockwise, so that the rotary pulley 510 in which the second arm 820 is integrally rotated counterclockwise.

When the rotary pulley 510 rotates counterclockwise, both cranks 610 and 610a of the connection link integrally formed in the rotary pulley 510 rotate counterclockwise to move the connecting rods 620 and 620a outward. Pushed toward the side, and the connecting blocks 630 and 630a and the second split nuts 120 and 120a on both sides are slid outward by the connecting rods 620 and 620a.

As a result, as the second split nut 120 on the left side moves outward, the first split nut 210 on the right side which is integrally coupled to the first connector 300 to the left side is pulled inward, As the two split nuts 220 move outwards, the first split nut 110 on the left side integrally coupled to the second split nut 220 is also pulled inward, such that the left and right half nuts 100 and 200 are pulled inward. ) Is engaged with each tie bar (31) (32).

Next, the release process will be described with reference to FIG. 6.

First, in the state of being fastened as shown in FIG. 5 described above, the output shaft 720 is rotated in the opposite direction (counterclockwise direction) of FIG. 5 by the driving source.

Then, as shown in FIG. 6, the first arm 810 of the rotary link 800 rotates counterclockwise to pull the intermediate link 830, and the intermediate link 830 watches the second arm 820. Direction, the rotation pulley 510 in which the second arm 820 is integrally formed is rotated in the clockwise direction.

When the rotary pulley 510 rotates in the clockwise direction, both cranks 610 and 610a of the connection link formed integrally with the rotary pulley 510 rotate clockwise to pull the connecting rods 620 and 620a inwards. The connecting rods 630 and 630a and the second split nuts 120 and 120a on both sides of the connecting rods 620 and 620a slide inwardly.

As a result, as the second split nut 120 on the left side is pulled inward, the first split nut 210 on the right side integrally coupled to the first split nut 300 is pushed outward, and the right side first split nut 120 is pushed outward. As the two-split nut 220 is pulled inward, the first split nut 110 on the left side which is integrally coupled to the second split nut 220 is also pushed outward, thereby allowing the left and right half nuts 100 and 200 to be pushed outward. ) Is released from each tie bar (31) (32) to release the fastening.

As described above, since the fastening and releasing operations of the left and right half nuts 100 and 200 occur at the same time by the rotation of the rotary pulley 510 by the driving source, the fastening and releasing by one drive source and an appropriate and simple link structure. The operation is accurate and easy to implement.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. In addition, the embodiments of the present invention as described above can be variously modified and equivalent other embodiments by those of ordinary skill in the art within the technical spirit of the present invention, such modifications and equivalent other embodiments are naturally It belongs to the appended claims of the present invention.

2: injection molding machine
10: fixed template
20: movable template
22: guide block
31, 32: tie bar
40: transfer device
100: left half nut
110, 210: First split nut
120, 220: second split nut
122, 222: through hole
200: right half nut
300: first connector
310, 410: Lock Nut
400: second connector
500: central axis
502: flange
510: Rotating Pulley
600: first connection link
600a: second connection link
610, 610a: crank
612, 612a: hinge shaft
620, 620a: connecting rod
622, 622a: hinge shaft
630, 630a: connecting block
700 drive source
710: reducer
720: output shaft
800: rotating link
810: first arm
812, 822: hinge shaft
820: second arm
830: intermediate link

Claims (9)

delete delete delete In the half nut fastening mechanism,
Divided into the first split nut (110) 210 and the second split nut (120) (220), respectively installed on both sides of the movable die plate in a state capable of sliding in the radial direction of the tie bar (31) (32) Left half nut 100 and right half nut 200;
A first connector 300 integrally connecting the second split nut 120 of the left half nut 100 and the first split nut 210 of the right half nut 200;
A second connector 400 integrally connecting the first split nut 110 of the left half nut 100 and the second split nut 220 of the right half nut 200;
At the center of the left half nut 100 and the right half nut 200, the tie bars 31 and 32 and the central axis are parallel to the central axis 500 fixed to the movable template 20 in a direction that can be bidirectionally rotated. Rotating pulley 510 is installed;
A driving source 700 for rotating the rotary pulley 510 in both directions; And
Tie bars 31 and 32 connect the second split nut 120 of the left half nut 100 and the second split nut 220 of the right half nut 200 by bidirectional angular movement of the rotary pulley 510, respectively. And first and second connection links 600 and 600a respectively connecting the rotary pulley 510 and the second split nuts 120 and 220 to reciprocate linearly in and out of the radial direction. ,
The first and second connection links 600, 600a,
Cranks (610) (610a) extending radially outward from both radial points that are symmetrical about the central axis of the rotary pulley (510);
Connecting rods 620 and 620a having one end hinged to both cranks 610 and 610a;
One end is hinged to the free end of the connecting rod 620, 620a and the opposite end is connected to the second split nut 120, 220 of the left and right half nuts 100, 200 Half nut fastening mechanism of the injection molding machine comprising a (630) (630a). 5. The method of claim 4,
The drive source 700 and the rotary pulley 510 is connected to the rotary link 800 for bidirectional angular movement of the rotary pulley 510 by the bidirectional angular movement of the drive source 700 of the injection molding machine Half nut fastening mechanism. The method of claim 5,
The drive source is a half nut fastening mechanism of the injection molding machine, characterized in that any one of a motor device, a hydraulic drive device, or a pneumatic drive device. The method of claim 5,
The rotary link 800,
A first arm 810 angularly moved in both directions by the drive source;
A second arm 820 extending radially outward at an outer circumference of the rotary pulley 510; And
And a middle link (830) connecting the first arm (810) and the second arm (820). The method of claim 7, wherein
The drive source is made of a motor, the first arm 810 is a half nut fastening mechanism of the injection molding machine, characterized in that the rotational movement center is installed on the output shaft (720) of the motor. The method of claim 7, wherein
The drive source (700) is made of a hydraulic cylinder device, the half nut fastening mechanism of the injection molding machine, characterized in that the end operating portion of the hydraulic cylinder device to operate the first arm (810).

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