JP2020104349A - Mold positioning device for injection molding machine - Google Patents

Abstract

To provide a mold positioning device for stabilizing horizontal positioning by being in contact with a side surface of a mold in a large area in a horizontal positioning mechanism.SOLUTION: The mold positioning device of an injection molding machine includes: a vertical positioning unit 5 for receiving a lower end surface of a mold 2 at a mold fixing unit 1 of the injection molding machine and positioning the mold 2 in a vertical direction; and a horizontal positioning unit 6 for receiving right and left side surfaces of the mold 2 and positioning the mold 2 in a horizontal direction. The horizontal positioning portion 6 has: a base block 19, provided in the mold fixing unit 1, and having a predetermined vertical length; a mold receiving block 20, provided on the base block 19 to be horizontally movable, being in contact with a side surface of the mold over a predetermined length in the vertical direction; and a horizontal leveling block 21, disposed horizontally between the base block 19 and the mold receiving block 20 to fix a distance between the two.SELECTED DRAWING: Figure 3

Description

The present invention relates to a mold positioning device for an injection molding machine.

The one described in Patent Document 1 (Japanese Patent Laid-Open No. 2017-1207) relates to a mold drop prevention device, but also discloses a mold positioning device.
This mold positioning device is a device for positioning molds of various sizes on a board surface of a fixed platen of an injection molding machine in a vertical direction and a horizontal direction. This mold positioning device includes a vertical positioning mechanism for positioning the mold in the vertical direction and a horizontal positioning mechanism for positioning the mold in the horizontal direction.

The vertical positioning mechanism is provided below the plate surface of the fixed platen and receives the lower end surface of the mold to position the mold in the vertical direction. Since this vertical positioning mechanism supports the lower end surface of the mold over a wide area, the mold can be positioned stably without tilting.

The horizontal positioning mechanism is provided at a middle stage of the plate surface of the fixed platen or at an upper position or a lower position, and is configured to receive the end surface orthogonal to the horizontal direction of the mold and position the mold in the horizontal direction. ing. The horizontal positioning mechanism includes one end side die receiving member that receives the end surface of the die. The one end side die receiving member was formed in a rectangular parallelepiped block shape, and had a small contact area with the end surface of the die.

JP, 2017-1207, A

In the method described in Patent Document 1, when changing the mold, the mold is held by a crane and inserted into an extremely narrow working space between a movable platen and a fixed platen of an injection molding machine to make a metal mold. The mold is positioned at a predetermined position by the mold positioning device, and the mold is attached to the board surface of the fixed platen.

At this time, the positioning work is performed in a procedure in which, in an extremely narrow working space, after the horizontal positioning mechanism determines the horizontal position, the vertical positioning mechanism performs the vertical positioning.

This is because if the vertical positioning mechanism is used to support the mold and the position in the height direction is determined, it will be difficult to move the heavy mold in the horizontal direction. Thus, the crane holds the metal mold in the left-right direction.

Therefore, even if the vertical positioning mechanism can stably position the die, if the positioning of the horizontal positioning mechanism that performs the positioning work first is unstable, as a result, stable positioning becomes difficult. It was a thing.

Since the conventional horizontal positioning mechanism comes into contact with the side surface of the mold due to a small area, it is difficult to accurately position the mold in the hanging state because the mold is tilted.

Further, this horizontal positioning mechanism is required to be accurately positioned in the horizontal direction according to the size of the mold to be changed, but the position of the bearing surface that receives the end face of the mold of the positioning mechanism is It was difficult to accurately position and fix in the horizontal direction.

Therefore, in the present invention, in the horizontal positioning mechanism, the lateral surface of the mold is contacted with a wide area to stabilize the horizontal positioning, and the horizontal position of the bearing surface that receives the end surface of the mold is accurately positioned. An object is to provide a mold positioning device that can be fixed.

In order to achieve the above-mentioned object, the present invention takes the following means. That is, the mold positioning device of the injection molding machine of the present invention includes a vertical positioning part that receives the lower end surface of the mold and positions the mold vertically in the mold fixing part of the injection molding machine, and the mold. A horizontal direction positioning portion that receives one side surface of the mold and horizontally positions the mold, and the horizontal positioning portion includes a base block provided on the mold fixing portion and having a predetermined vertical length. , A mold receiving block which is provided on the base block so as to be movable in the horizontal direction and abuts on the side surface of the mold for a predetermined length in the vertical direction, and is interposed between the base block and the mold receiving block to fix the distance between them. And a horizontally arranged leveling block.

It is preferable that the leveling block and the base block are provided with mounting portions for horizontally fixing the leveling block to the base block.

The mounting portion may fix the base block and the leveling block by magnetic coupling.

The mounting portion may fix the base block and the leveling block by screwing.

The mounting portion may fix the base block and the leveling block with a ball lock.

It is preferable that an engaging portion that engages with the die receiving block is provided at the other end of the leveling block on the side opposite to the mounting portion.

According to the present invention, in the horizontal positioning portion, since the mold receiving block is in contact with the side surface of the mold over a predetermined length in the vertical direction, it is possible to contact in a wide area. And the horizontal positioning can be easily performed.

Further, since the leveling block is interposed between the base block and the die receiving block, the die receiving block can be accurately positioned in the horizontal direction.

Explanatory drawing which shows the outline of metal mold positioning using the apparatus of this invention. The front view which shows the standby state before mounting a metal mold|die in embodiment of this invention. FIG. 3 is a drawing from the state of FIG. 2 to the mold positioning state. The partial cross section front view in the positioning state of a vertical direction positioning part. The side view in the standby state of a vertical direction positioning part. The partial cross section front view which shows embodiment of a horizontal direction positioning part. The right view of FIG. Explanatory drawing at the time of mounting a leveling block in a horizontal positioning part. It is a perspective view which shows the seating surface of a leveling block, (a) is what the ring-shaped magnet was attached, (b) shows what the cylindrical magnet is arrange|positioned on the circumference. The expanded sectional view of the mounting part in the A section of FIG. The partial cross-section front view of the horizontal positioning apparatus with which the mounting part by another embodiment of this invention was screw-connected. The partial cross section front view in the extended state of the assist apparatus in other embodiment of this invention. The top view in the expansion-contraction state of an assist device.

Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 1, the injection molding machine has a fixed platen 1a that is a mold fixing unit 1 and a movable platen 1b. A mold 2 suspended by an overhead crane is inserted between both platens 1a and 1b. In the mold 2, a fixed mold 2a attached to the fixed platen 1a and a movable mold 2b attached to the movable platen 1b are integrally coupled and suspended. A locating ring 3 is provided at the center of the end surface of the fixed mold 2a. A fitting recess 4 into which the locate ring 3 fits is formed in the fixed platen 1a. The positioning of the mold is performed by fitting the locate ring 3 into the fitting recess 4.

The mold positioning device of the injection molding machine is provided on the fixed platen 1a, and receives the lower end surface of the mold 2 to position the mold 2 in the vertical direction. It has a horizontal positioning portion 6 which receives the side surface and positions the mold 2 in the horizontal direction. The movable platen 1b is also provided with a vertical positioning portion 5 and a horizontal positioning portion 6.

A pair of upper and lower horizontal positioning portions 6 on the movable platen 1b side are provided at the height position of the center, whereas a horizontal positioning portion 6 on the fixed platen 1a side is provided at the height position of the center. ..

As shown in FIGS. 2 and 3, a magnet clamp 7 is provided on the fixed platen 1a. The surface of the magnet clamp 7 serves as a mold mounting surface 8 of the mold fixing portion 1. The magnet clamp 7 attracts and fixes the mold 2 by magnetic force. A fitting recess 4 into which the locate ring 3 of the mold 2 is fitted is formed at the center of the magnet clamp 7.

The center of the fitting recess 4 is the “center”. The left and right means the left and right in FIGS. 2 and 3, and the left and right direction is the horizontal direction.

The vertical positioning portion 5 is provided at the center of the lower portion of the magnet clamp 7 in the left-right direction.
The horizontal positioning portion 6 is provided on the left side of the magnet clamp 7 in the vertical center.

As shown in FIGS. 4 and 5, the vertical positioning portion 5 includes a base 9 fixed to the lower center of the magnet clamp 7 and a mold positioning pusher 10 disposed above the base 9. A pair of left and right guides 11 for guiding the pusher 10 so that the pusher 10 can be moved up and down with respect to the base 9, a fluid pressure cylinder 12 that is mounted on the base 9 and can drive the pusher 10 up and down, and between the base 9 and the pusher 10. A pair of left and right vertical leveling blocks 13 are detachably mounted.

The base 9 is composed of a member that is long in the left-right direction, and its left and right are fixed to the magnet clamp 7 by bolts 14. A pair of left and right parallel keys 15 are interposed between the base 9 and the magnet clamp 7 to ensure the horizontality of the base 9.

The pusher 10 has the same horizontal length as the base 9. A pair of left and right guides 11 are fixed to the pusher 10 in a hanging shape. The guide 11 is slidably inserted into a guide hole 16 provided in the base 9.

The fluid pressure cylinder 12 is provided at the center of the lower surface of the base 9, a cylinder rod 17 penetrates through the base 9 and extends upward, and its upper end is fixed to the lower surface of the pusher 10. The fluid pressure cylinder 12 is a double-acting air cylinder, but may be a hydraulic cylinder.

A plurality of types of vertical leveling blocks 13 having different lengths are prepared in advance, and the vertical leveling block 13 having a length corresponding to the size of the mold 2 is manually inserted between the base 9 and the pusher 10. .. The vertical leveling block 13 is formed in a cylindrical shape, and projections 18, 18 are coaxially provided on the upper and lower end surfaces thereof. A fitting hole is formed in the base 9 and the pusher 10 to receive the protrusion 18.

A plurality of types of vertical leveling blocks 13 having different lengths are prepared in advance, and the vertical leveling block 13 having a length corresponding to the size of the mold 2 is manually inserted between the base 9 and the pusher 10. It

In order to mount the vertical leveling block 13, the pusher 10 is slightly raised from a predetermined position, the protrusion 18 is fitted into the fitting hole of the base 9, and the vertical leveling block 13 is in a self-supporting state. The pusher 10 is lowered, the upper protrusion 18 of the vertical leveling block 13 is fitted into the fitting hole of the pusher 10, and the vertical leveling block 13 is clamped. When the die 2 is placed on the pusher 10, the pair of left and right vertical leveling blocks 13 support the weight of the die 2 and ensure the levelness of the pusher 10 and the vertical direction of the die 2. Determine the position of.

As shown in FIGS. 6 and 7, the horizontal positioning section 6 is movable in the horizontal direction on the base block 19 provided in the mold fixing section 1 and having a predetermined vertical length. Is provided on the side surface of the mold and is in contact with the side surface of the mold for a predetermined length in the vertical direction, and horizontal leveling in a horizontal arrangement interposed between the base block 19 and the mold receiving block 20 to fix the distance therebetween. And a block 21.

The base block 19 is composed of a member that is long in the vertical direction, and its upper and lower portions are fixed to the magnet clamp 7 by bolts 22 and positioning pins 23.

The mold receiving block 20 has the same vertical length as the base block 19. A pair of upper and lower guides 24 are horizontally fixed to the mold receiving block 20. The guide 24 is slidably inserted into a guide hole 25 provided in the base block 19.

A cylinder 26 is provided at the center of the left side surface of the base block 19, a cylinder rod 27 extends rightward through the base block 19, and its right end is fixed to the left side surface of the die receiving block 20. The cylinder 26 is a double-acting air cylinder, but may be a hydraulic cylinder.

A plurality of types of horizontal leveling blocks 21 having different lengths are prepared in advance, and the horizontal leveling block 21 having a length corresponding to the size of the mold 2 is manually inserted between the base block 19 and the mold receiving block 20. Inserted in.

As shown in FIG. 8, in order to mount the horizontal leveling block 21 between the base block 19 and the mold receiving block 20, the mold receiving block 20 is moved to the right longer than the length of the horizontal leveling block 21, and the base block 19 is attached. Mount the horizontal leveling block 21.

At this time, a mounting portion 28 that prevents the horizontal leveling block 21 from tilting or separating from the base block 19 is provided on the base block 19 and the horizontal leveling block 21. The horizontal leveling block 21 and the mold receiving block 20 on the side opposite to the mounting portion 28 are provided with an engaging portion 29 that engages the both in a detachable manner.

The horizontal leveling block 21 is formed in a columnar shape, and protrusions 30 and 31 are provided coaxially on the left and right end surfaces thereof. Fitting holes for receiving the protrusions are formed in the base block and the mold receiving block.

The fitting hole of the base block 19 and the protrusion 31 of the horizontal leveling block 21 fitted into the fitting hole constitute a mounting portion 28, and the fitting hole of the die receiving block 20 is fitted into the fitting hole. The protrusion 30 of the horizontal leveling block 21 constitutes an engaging portion 29.

In the mounting portion 28, the fitting hole of the base block 19 and the projecting portion 31 of the horizontal leveling block 21 form a fitting portion, and are fitted tightly so as not to rattling, so that the horizontal leveling block 21 has a horizontal posture. The engaging portion 29 at the other end is maintained and smoothly engaged.

As shown in FIGS. 9 and 10, the mounting portion 28 can fix the base block 19 and the horizontal leveling block 21 by magnetic coupling. The end surface of the mounting portion 28 around the protrusion 31 of the horizontal leveling block 21 is a seating surface that is in close contact with the end surface of the base block 19. The magnet 32 is embedded in this seating surface and is attracted to the base block 19 to reliably maintain the levelness. The magnet 32 may be ring-shaped as shown in FIG. 9A, or may be cylindrical magnets arranged on the circumference as shown in FIG. 9B.

According to the above embodiment, the mold positioning device is in the standby position shown in FIG. That is, the pusher 10 of the vertical positioning portion 5 stands by at the lower end position, and the die receiving block 20 of the horizontal positioning portion 6 waits at the left end.

Next, as shown in FIG. 3, the pusher 10 of the vertical positioning portion 5 is raised by the fluid pressure cylinder 12 in accordance with the size of the mold 2 attached to the mold fixing portion 1, and the pusher 10 and the base are The vertical leveling block 13 having a predetermined length is inserted between the vertical and horizontal positions 9 and 9, and the pusher 10 is lowered to sandwich the vertical leveling block 13 and position it at a predetermined position.

Also in the horizontal positioning portion 6, the mold receiving block 20 is moved to the right from the standby position according to the size of the mold 2, and the horizontal leveling block 21 is attached to the base block 19 in the state shown in FIG. .. At this time, the mounting portion 28 mounts the horizontal leveling block 21 on the base block 19 while maintaining the levelness. In other words, the horizontal leveling block 21 maintains the levelness without tilting or detaching due to the fitting portion of the mounting portion 28 and the magnet 32.

Then, the cylinder 26 is operated to move the die receiving block 20 to the left, and the die receiving block 20 and the engaging portion 29 of the horizontal leveling block 21 are engaged with each other, so that the distance between the base block 19 and the die receiving block 20 is increased. Fix it.

Then, as shown in FIG. 1, the mold 2 is suspended and inserted into the mold fixing part 1 of the injection molding machine, and as shown in FIG. The left side surface of the mold 2 is supported by the mold receiving block 20 of the horizontal positioning portion 6. At this time, since the mold receiving block 20 and the side surface of the mold are in contact with each other over a wide area, horizontal positioning can be performed without tilting the mold.

Then, the crane is lowered, and the mold 2 is lowered onto the pusher 10 of the vertical positioning portion 5. As a result, the die 2 can be centered and the locator ring 3 can be fitted into the fitting recess 4.

Since the length of the horizontal leveling block 21 is determined in advance according to the mold for changing the mold, it is possible to finely position the mold receiving block 20 in the horizontal direction in units of 1 mm.

FIG. 11 shows another embodiment of the present invention, in which the mounting method of the horizontal leveling block 21 of the horizontal positioning portion 6 is different.

That is, the mounting portion 28 is configured to fix the base block 19 and the horizontal leveling block 21 by screw connection.

In this embodiment, the horizontal leveling block 21 is prevented from falling off by the bolt 33 inserted from the base block 19, and the levelness is maintained.

Although not shown, the mounting portion 28 may fix the base block 19 and the horizontal leveling block 21 by a ball lock method. That is, a ball lock mechanism (one-touch coupler system) can be provided between the fitting hole and the protrusion 31 to maintain the levelness of the horizontal leveling block.

What is shown in FIGS. 12 and 13 is another embodiment of the present invention. In the above-described embodiment, the horizontal positioning is performed by pushing the mold by hand, but this embodiment is different in that the assisting device 31 is used instead of the manual operation.

That is, the mold fixing unit 1 on the opposite side of the horizontal positioning unit 6 is provided with an assist device 34 that presses the mold 2 toward the horizontal positioning unit 6 side.

The assist device 34 is provided on the right side of the mold fixing portion 1 in FIGS. 2 and 3, and is provided to face the horizontal positioning portion 6 in the horizontal direction.

The assist device 34 includes a base 35 fixed to the center of the right side of the magnet clamp 7, a pusher 36 for pressing a mold disposed on the left side of the base 35, and the pusher 36 movable with respect to the base 35. It is provided with a pair of upper and lower guides 37 for guiding and a fluid pressure cylinder 38 mounted on the base 35 and capable of moving the pusher 36 in the left and right directions. The base 35 is provided with a linear bush 39 that slidably guides the guide 37.

The centering according to this embodiment is different from the manual pushing shown in FIGS. 2 and 3 in that the die 2 is pushed by the assisting device 34, and the other points are the same, and therefore detailed description will be omitted. ..

The embodiments of the presently disclosed embodiments are illustrative in all respects, and are not restrictive. For example, in a case where the mold 2 is directly attached to the fixed platen 1a without providing the magnet clamp 7 on the fixed platen 1a, the mold positioning device is provided on the fixed platen. Further, although the horizontal positioning portion 6 is provided at the vertical center of the left side portion of the magnet clamp 7, it is not limited to the left side and may be on the right side, and a pair of upper and lower sides may be provided instead of the center arrangement. ..

The scope of the present invention is shown not by the above description but by the claims, and includes meaning equivalent to the claims and all modifications within the scope.

1 mold fixing part 1a fixed platen 1b movable platen 2 mold 2a fixed mold 2b movable mold 3 locate ring 4 fitting concave 5 vertical positioning part 6 horizontal positioning part 7 magnet clamp 8 mold mounting surface 9 base 10 Pusher 11 Guide 12 Fluid pressure cylinder 13 Vertical leveling block 14 Bolt 15 Parallel key 16 Guide hole 17 Cylinder rod 18 Protrusion 19 Base block 20 Mold receiving block 21 Horizontal leveling block 22 Bolt 23 Positioning pin 24 Guide 25 Guide hole 26 Cylinder 27 Cylinder 27 Cylinder Rod 28 Mounting part 29 Engagement part 30 Projection part 31 Projection part 32 Magnet 33 Bolt 34 Assist device 35 Base 36 Pusher 37 Guide 38 Fluid pressure cylinder 39 Linear bush

Claims (6)

A vertical direction positioning part that receives the lower end surface of the mold and positions the mold vertically in the mold fixing part of the injection molding machine, and a left and right one side surface of the mold to position the mold horizontally. With a horizontal positioning part,
The horizontal positioning portion is provided on the mold fixing portion and has a predetermined vertical length. The horizontal positioning portion is horizontally movably provided on the base block and has a predetermined vertical length on the side surface of the mold. A die positioning device for an injection molding machine, comprising: a die receiving block that abuts over the base block; The mold positioning device of an injection molding machine according to claim 1, wherein the leveling block and the base block are provided with a mounting portion for horizontally fixing the leveling block to the base block. The mold positioning device of an injection molding machine according to claim 2, wherein the mounting portion fixes the base block and the leveling block by magnetic coupling. The mold positioning device of an injection molding machine according to claim 2, wherein the mounting portion fixes the base block and the leveling block by screw connection. The mold positioning device of an injection molding machine according to claim 2, wherein the mounting portion fixes the base block and the leveling block with a ball lock. The gold of the injection molding machine according to any one of claims 2 to 5, wherein an engaging portion that engages with the mold receiving block is provided at the other end of the leveling block opposite to the mounting portion. Mold positioning device.

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