JP2003062880A - Mold clamping device for molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly rotate an adjusting nut without the generation of a shakiness between the collar of the adjusting nut and a toggle support which does not move even by the inertia of a movable platen during opening/closing a mold, which sufficiently secures the opening/closing precision of the mold, and adjusts the position of the toggle support by easily rotating the adjusting nut. SOLUTION: The mold clamping device for a molding machine comprises a guide member with a thread formed on the end, a support member of a mold clamping mechanism with a seat face 19a formed on the back and an insertion hole for a guide member, an adjusting nut 15 to be screwed into a thread of the guide member, a gear installed on the end face, on the back, of the adjusting nut 15, a support member which is mounted so that it is positioned between the gear and the support member of the mold clamping mechanism and supports the adjusting nut 15 and a breaking device capable of pressing the adjusting nut 15 onto the seat face 19a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold clamping device for a molding machine.

[0002]

2. Description of the Related Art Conventionally, in a molding machine such as an injection molding machine, a resin heated and melted in a heating cylinder is injected at a high pressure to fill a cavity space of a mold device. A molded product is molded by cooling and solidifying the resin in the cavity space.

To this end, the mold device is composed of a fixed mold and a movable mold, and the mold clamping device moves the movable mold forward and backward to bring the movable mold into and out of contact with the fixed mold to open and close the mold. , Mold closing, mold clamping and mold opening can be performed. And the mold clamping device is
In general, a fixed platen that holds a fixed mold and a movable platen that holds a movable mold are provided, and a toggle mechanism as an opening / closing device that advances and retracts the movable platen is provided, and the toggle mechanism is attached to a toggle support. It is operated by driving an electric motor, a hydraulic cylinder, or the like.

By the way, in the injection molding machine, the fixed platen to which the fixed mold is attached is fixed to the frame, but since the thickness of the mold device is different, the mold device is replaced every time the mold device is replaced. It is necessary to adjust the position of the mold clamping device according to the thickness of the device. Further, since the fixed platen and the toggle support of the mold clamping device are coupled by a plurality of, for example, four tie bars and are relatively positioned, when adjusting the position of the mold clamping device, Move the toggle support along the tie bar.

In this case, it is necessary to move the toggle support evenly with respect to the four tie bars. Therefore, a screw is formed on the outer periphery of the four tie bars, four nuts that are respectively screwed into the screws are attached to the toggle support, and the nuts are rotated evenly to move the toggle support. It has become.

FIG. 2 is a sectional view of a conventional position adjustment device for a toggle support port.

In the figure, 101 is a toggle support that supports a toggle mechanism (not shown), and is attached to the frame (not shown) so as to be movable in the lateral direction in the figure. Reference numeral 102 denotes a plurality of, for example, four tie bars installed between a fixed platen (not shown) fixed to the frame and the toggle support 101. The right end (not shown) of the tie bar 102 is fixed to the fixed platen.

The toggle support 101 has
A plurality of, for example, four tie bar insertion holes 104 are formed, and the left end of the tie bar 102 in the drawing is inserted into each of the tie bar insertion holes 104. A mold clamping drive source such as an electric motor or a hydraulic cylinder for moving a crosshead (not shown) to operate the toggle mechanism is attached to the center of the left side surface of the toggle support 101.

Here, each of the tie bars 102 has a threaded portion 103 having a thread formed on the outer periphery at the left end, and an adjusting nut 105 is screwed into the threaded portion 103. The adjusting nut 105 is fitted (fitted) in a nut recess 107 formed on the side surface of the toggle support 101, and is further closed (blocked) by a push plate 106 from the left side in the drawing. The push plate 106 is fixed to the left side surface of the toggle support 101 by a fixing bolt (not shown). As a result, the adjusting nut 105 is attached to the toggle support 101 rotatably and immovably in the axial direction of the tie bar 102.

A planetary gear 111 is fixed to each of the adjusting nuts 105 by a fixing bolt (not shown). On the other hand, a sun gear (not shown) is rotatably attached to the center of the left side surface of the toggle support 101. The sun gear is the four planetary gears 11
It is arranged at the center of 1 and meshes with each planet gear 111.

When a sun gear driving device (not shown) is operated, the sun gear rotates, each planetary gear 111 rotates, and the adjusting nut 105 to which the planetary gear 111 is attached rotates. Since the tie bar 102 is attached to the fixed platen and cannot rotate, the adjustment nut 105 rotates to move the adjustment nut 105 in the axial direction of the tie bar 102. Therefore, the toggle support 101 to which the adjusting nut 105 is attached is moved in the axial direction of the tie bar 102, and the position of the mold clamping device is adjusted.

Since the four adjusting nuts 105 rotated by the rotation of the sun gear all have the same number of rotations, the toggle support 101 has four tie bars 1.
It is moved evenly along 02.

[0013]

However, in the mold clamping device of the conventional molding machine described above, the collar portion 105a of the adjusting nut 105, the pressing plate 106, and the nut recess 1 are formed.
Since there is a gap 108 between the adjustment nut 105 and the toggle support 101, the position of the adjustment nut 105 with respect to the toggle support 101 is not strictly fixed, and the adjustment nut 1 is adjusted by the size of the gap 108.
There is rattling between 05 and the toggle support 101. Therefore, the tie bar 1 of the toggle support 101
The position with respect to 02 is not strictly fixed, and rattling occurs between the toggle support 101 and the tie bar 102. Then, the toggle support 101 and the tie bar 10
If there is rattling between the two, the toggle support 101 moves due to the inertia of the movable platen when the mold is opened and closed, and it becomes impossible to sufficiently secure the mold opening and closing accuracy.

Here, the gap 108 is eliminated by reducing the depth of the nut recess 107, thickening the collar portion 105a of the adjusting nut 105, and pressing the pressing plate 106 against the collar portion. be able to. However, since a lubricant such as grease is accommodated in the gap 108, if the gap 108 is completely eliminated, the collar portion 105a and the nut for the nut 105a are rotated when the adjusting nut 105 is rotated. Recess 107 and push plate 1
The lubricant is not present between 06 and the frictional resistance is increased. When the frictional resistance increases, the planetary gear 111, the sun gear, the sun gear driving device, etc. may be overloaded and damaged. Also, if the output of the sun gear drive is not large, the adjustment nut 105 cannot be rotated.

The present invention solves the problems of the mold clamping device of the conventional molding machine described above so that rattling does not occur between the collar portion of the adjusting nut and the toggle support, and the adjusting nut is smooth. The toggle support does not move due to the inertia of the movable platen when opening and closing the mold, so that the accuracy of mold opening and closing can be sufficiently secured, and the position of the toggle support can be easily rotated by rotating the adjustment nut. An object of the present invention is to provide a mold clamping device of a molding machine that can perform adjustment.

[0016]

Therefore, in the mold clamping device of the molding machine of the present invention, a guide member having an end formed with a screw and a seating surface formed on the back side and a guide member inserted therethrough are formed. A mold clamping mechanism supporting member having a hole, an adjusting nut screwed into a screw of the guide member, a gear attached to a rear end surface of the adjusting nut, and a rear face of the gear and the mold clamping mechanism supporting member. It has a support member attached so as to be located between and supporting the adjustment nut, and a brake device capable of pressing the adjustment nut against the seat surface.

In the mold clamping device of another molding machine of the present invention, the brake device is further provided with a pressing release means.

In still another mold-clamping device for a molding machine of the present invention, a recess is formed on the back side of the mold-clamping mechanism support member, and the adjusting nut is fitted in the recess.

In still another mold clamping apparatus for a molding machine of the present invention, a recess is formed in the support member on the mold clamping mechanism support member side, and the adjustment nut is fitted into the recess.

In the mold clamping device of still another molding machine of the present invention, the adjusting nut further includes a flange portion protruding in the radial direction.

In still another mold clamping device of a molding machine of the present invention, the brake device further includes a brake plate and a brake plate drive device for moving the brake plate.

In still another mold clamping device of a molding machine of the present invention, the brake plate further presses the adjustment nut, and the brake plate driving device resists the spring member and the spring member. It is an electromagnet that attracts the plate.

In still another mold clamping device of a molding machine of the present invention, the brake plate presses the gear, and the brake plate drive device is a cylinder device operated by a pressurized fluid.

In the mold clamping device of still another molding machine of the present invention, the braking device is formed between the adjusting nut and the support member and presses the adjusting nut against the seat surface. It is a space part provided with a pressurizing means.

In the mold clamping device of still another molding machine of the present invention, the pressurizing means is a pressurized fluid supplied into the space.

In the mold clamping device of still another molding machine of the present invention, the pressing means is a spring member arranged in the space.

In the mold clamping device of still another molding machine of the present invention, the brake device further comprises a pressure releasing means for supplying a pressurized fluid between the adjusting nut and the seat surface.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The mold clamping device of the present invention can be applied to various devices and applications, but in the present embodiment, for convenience of explanation, a case where it is applied to an injection molding machine will be described.

FIG. 3 is a schematic view of an injection molding machine according to the first embodiment of the present invention.

In the figure, 31 is a frame, 32 is a fixed platen fixed to the frame 31, and 11 is a movable platen 31 with a predetermined distance from the fixed platen 32. Is a toggle support as a mold clamping mechanism supporting member.

Reference numeral 12 denotes a tie bar as a guide member for a plurality of, for example, four, which is installed between the fixed platen 32 and the toggle support 11. The right end in the figure is fixed to the fixed platen 32 by a fixing member 38. To be done. In addition, the toggle support 11 is the tie bar 12
Move along.

Reference numeral 35 denotes a movable platen as a movable mold supporting device which is arranged so as to face the fixed platen 32 and is movable along the tie bar 12 so as to be movable back and forth (movable in the left-right direction in the drawing). is there. Further, a fixed mold 34 is mounted on a mold mounting surface 33 of the fixed platen 32 facing the movable platen 35, and a movable mold is mounted on a mold mounting surface 36 of the movable platen 35 facing the fixed platen 32. 37 is attached.

A drive device (not shown) for moving an ejector pin may be attached to the rear end (left end in the drawing) of the movable platen 35.

A toggle mechanism 4 as a mold clamping mechanism is provided between the movable platen 35 and the toggle support 11.
0, a mold clamping drive source (not shown) is attached to the back surface (the surface on the left side in the drawing) of the toggle support 11. The mold clamping drive source includes a hydraulic cylinder, a servomotor, and the like, and the toggle mechanism 40 can be operated by moving the crosshead 45 as a driven member forward and backward.

As a result, the movable platen 35 is moved forward (moved to the right in the figure) to close the mold, and the propulsive force from the mold clamping drive source is multiplied by the toggle ratio to generate the mold clamping force. Then, the mold is clamped by the mold clamping force. In the present embodiment, the mold clamping force is generated by operating the toggle mechanism 40. However, without using the toggle mechanism 40, the propulsive force from the mold clamping drive source is directly used as the mold clamping force. Movable platen 3
5 can also be transmitted.

The toggle mechanism 40 includes a toggle lever 42 that is swingably supported by the crosshead 45.
The toggle lever 41 is swingably supported by the toggle support 11, and the toggle arm 43 is swingably supported by the movable platen 35. The toggle lever 41 and the toggle lever 42 are connected to each other. Between, and
The toggle lever 41 and the toggle arm 43 are linked to each other.

Next, the position adjusting device for the toggle support 34 will be described.

FIG. 1 is a sectional view of a toggle support position adjusting device according to the first embodiment of the present invention.
FIG. 4 is an enlarged view of the part, and FIG. 4 is a view of the toggle support in the first embodiment of the present invention as viewed from the direction of arrow A.

In FIG. 1, 14 is a toggle support 11.
1. A plurality of, for example, four tie bar insertion holes are formed in the corners of the guide members as the guide member insertion holes, and penetrate the toggle support 11 left and right in FIG. Then, the left ends of the tie bars 12 are inserted into the tie bar insertion holes 14, respectively.

Each of the tie bars 12 has a threaded portion 13 with a thread formed on the outer periphery at the left end, and an adjusting nut 15 is screwed into the threaded portion 13. The adjusting nut 15 is fitted into a nut recess 19 formed as a large diameter portion on the back side of the toggle support 11 in the tie bar insertion hole 14.

Here, as shown in FIG. 1, the adjusting nut 15 has a substantially cylindrical shape with a flange portion 15a protruding in the radial direction near the center of the outer circumference. On the other hand, a step portion is formed in the nut recess 19 and the front surface of the flange portion 15a of the adjusting nut 15 (the right surface in FIG. 1).
Faces the bearing surface 19a of the stepped portion of the nut recess 19.

On the rear surface (the surface on the left side in FIG. 1) of the collar portion 15a, the brake device and the adjusting nut 15 are provided.
Brake support plate 16 as a support member for supporting the vehicle
Is provided. The brake device in the present embodiment includes a spring member 22, an electromagnet 27, and a brake plate 17, which will be described later. The brake support plate 16 has an insertion hole into which the small diameter portion of the adjustment nut 15 is inserted, and is fixed to the back surface of the toggle support 11 by a stepped mounting bolt 28. Here, a predetermined distance is maintained between the front surface of the brake support plate 16 and the back surface of the toggle support 11 and between the brake plate 17 and the brake support plate 16. For example,
By setting the length dimension (including the head) of the large-diameter portion of the stepped mounting bolt 28 to the thickness dimension of the brake support plate 16 and the brake plate 17 plus the predetermined interval, the stepped mounting Bolt 28 toggle support 11
Even if it is tightened in the screw hole formed on the back surface of the, the predetermined interval can be always maintained. A recess for accommodating the spring member 22 and the electromagnet 27 as a brake plate driving device is formed on the front surface of the brake support plate 16, and the spring member 22 and the electromagnet 27 are attached to the recess.

The adjusting nut 1 is provided between the front surface of the brake support plate 16 and the back surface of the toggle support 11.
A brake plate 17 having an insertion hole into which the small-diameter portion 5 is inserted is arranged. The brake plate 17 has a hole into which the stepped mounting bolt 28 is inserted, and is prevented from rotating by the stepped mounting bolt 28. Further, the brake plate 17 is pressed against the back surface of the collar portion 15 a of the adjusting nut 15 by the spring member 22 attached to the brake support plate 16. The spring member 22
Is, for example, a coil spring, but may be a rubber bush, an air spring, or the like, and may be any one. The brake plate 17 preferably has a large frictional resistance on at least the front surface. For the brake plate 17, for example, a plate member made of a magnetic material such as steel and having a roughened front surface to increase friction resistance can be used.

Since the spring member 22 presses the collar portion 15a to the right in the figure via the brake plate 17, the space between the brake plate 17, the collar portion 15a and the seat surface 19a is reduced. There is no gap between the brake plate 17 and the flange 15a.
The seat surface 19a and the seat surface 19a are in close contact with each other. Therefore, rattling does not occur between the brake plate 17, the collar portion 15a and the seat surface 19a.

The planetary gears 21 are fixed to the rear end faces of the adjusting nuts 15 by gear fixing bolts (not shown). The rotation center axes of the planetary gear 21 and the adjusting nut 15 are the same.

The sun gear 23 is rotatably attached to the back surface of the toggle support 11 via a bearing (not shown). As shown in FIG. 4, the sun gear 23 is arranged at the center of the four planetary gears 21 and meshes with each planetary gear 21.

The sun gear drive 25 is attached to the toggle support 11 via an attachment member (not shown). The sun gear drive 25 comprises an electric motor such as a pulse motor, and the sun gear drive 25
A drive gear 26 is attached to the rotation shaft of the. The sun gear driving device 25 is arranged around the sun gear 23, and the driving gear 26 meshes with the sun gear 23. Therefore, when the sun gear driving device 25 is operated, the sun gear 23 is operated. Is rotated.

As a result, when the sun gear drive 25 is operated to rotate the drive gear 26, the sun gear 23
The planetary gear 2 that rotates and meshes with the sun gear 23.
1 is rotated, and the adjusting nut 15 to which the planetary gear 21 is attached is rotated.

The tie bar 12 is not rotatable because the right end in FIG. 3 is attached to the fixed platen 32. Therefore, the adjustment nut 15 is
By rotating, it moves in the axial direction of the tie bar 12. As a result, the entire toggle support 11 to which the adjusting nut 15 is attached is moved in the axial direction of the tie bar 12, and the position of the mold clamping device is adjusted.

Since the four planetary gears 21 have the same diameter and the same number of teeth, the four planetary gears 21 and the adjusting nut 15 which are rotated by the rotation of the sun gear 23 all have the same number of rotations. Then, the screws formed on the four adjusting nuts 15 and the four tie bars 12 are provided.
The screws formed on the threaded portion 13 are all the same. Therefore, since the movement amounts of the four adjusting nuts 15 with respect to the tie bars 12 are equal, the toggle support 11 can be moved evenly along the four tie bars 12.

Further, it is desirable that the mold clamping device has a control device including a CPU, an arithmetic unit such as an MPU, a semiconductor memory, a storage unit such as a magnetic disk, an input unit such as a keyboard, and an input / output interface. In this case, the control device controls all operations of the mold clamping device including the operations of the sun gear drive device 25, the electromagnet 27, and the like. The control device may be independent,
It may be a part of another control device such as a control device for controlling the operation of the injection molding machine.

Next, the operation of the mold clamping device having the above construction will be described.

First, a mold clamping drive source (not shown) is operated, and the crosshead 45 is moved forward to operate the toggle mechanism 40. This allows the movable platen 3
5 is advanced, the movable mold 37 is joined to the fixed mold 34, the mold is closed, and then the mold is clamped. Subsequently, resin is injected at high pressure from an injection device (not shown),
The cavity space of the movable mold 37 and the fixed mold 34 is filled. Then, the resin is cooled and solidified to form a molded article. Then, the mold clamping drive source is operated and the crosshead 45 is retracted, whereby the movable platen 35 is retracted, the movable mold 37 is separated from the fixed mold 34, and mold opening is performed. continue,
When an ejector rod (not shown) is advanced, the ejector pin projects into the cavity space inside the movable mold 37 to eject the molded product. As a result, the molded product is ejected. By repeating the above operation, a large number of molded products are molded.

When molding different molded products,
The movable mold 37 and the fixed mold 34 as the mold device are replaced. Here, when the thickness of the mold device is different before and after the replacement, it is necessary to adjust the position of the mold clamping device according to the thickness of the mold device after the replacement. In this case, toggle support 1
By moving 1 in the axial direction of the tie bar 12,
Adjust the position of the mold clamping device.

First, the electromagnet 27 is activated to attract the brake plate 17. In this case, the electromagnet 27
Has a larger suction force than the spring force of the spring member 22. Therefore, the brake plate 17 is attracted by the electromagnet 27, moves to the left in the drawing, and comes into close contact with the front surface of the brake support plate 16. As a result, the collar portion 1 of the adjusting nut 15
The force for pressing 5a against the seat surface 19a of the nut recess 19 is released, that is, the pressing is released, and the adjusting nut 15 can freely rotate.

Next, the sun gear driving device 25 is operated to rotate the drive gear 26 and rotate the sun gear 23.
Then, all the planetary gears 21 meshing with the sun gear 23 are rotated by equal amounts, and the adjusting nuts 15 to which the respective planetary gears 21 are attached are rotated by equal amounts. Then, as the adjusting nut 15 rotates, the toggle support 11 to which the adjusting nut 15 is attached is moved in the axial direction of the tie bar 12, and the position of the mold clamping device is adjusted. That is, the toggle support 11 can be moved by an equal amount with respect to all the tie bars 12.

Here, the pitch of the screw formed on the adjusting nut 15 and the screw portion 13 of the tie bar 12, and
Planetary gear 21, sun gear 23, and sun gear drive 25
Based on the number of teeth of the drive gear 26 of the toggle support 11
It is possible to calculate in advance the relationship between the amount of movement and the rotation speed of the sun gear drive device 25. Therefore, the toggle support 11 can be moved by a predetermined amount by adjusting the rotation speed of the sun gear drive device 25. Then, when the toggle support 11 moves by a predetermined amount, the sun gear drive device 25 is stopped.

Next, the operation of the electromagnet 27 is stopped. Therefore, the brake plate 17 is moved to the right in the drawing by the spring force of the spring member 22, and is pressed against the back surface of the flange portion 15a of the adjusting nut 15.
That is, the brake plate 17 presses the adjustment nut 15. Since the spring member 22 presses the collar portion 15a rightward in the drawing via the brake plate 17, a gap is formed between the brake plate 17, the collar portion 15a and the seat surface 19a. The brake plate 17 and the collar portion 1 are not generated.
5a and the seat surface 19a are in close contact with each other. Therefore, rattling does not occur between the brake plate 17, the collar portion 15a, and the seat surface 19a. Further, the adjustment nut 15 cannot rotate due to the frictional resistance between the brake plate 17, the flange portion 15a and the seat surface 19a. That is, the adjustment nut 15 is in a braked state and cannot rotate.

Therefore, the toggle support 11 does not rattle, and since the adjustment nut 15 cannot rotate, the position of the toggle support 11 does not change.

As described above, in this embodiment, the brake plate 1 is provided on the back surface of the collar portion 15a of the adjusting nut 15.
7, the brake plate 17 is normally pressed against the back surface of the flange portion 15a by a spring member 22, and is separated from the back surface of the flange portion 15a by an electromagnet 27 when adjusting the position of the mold clamping device. It is supposed to be.

Therefore, normally, the brake plate 1
7. There is no rattling between the collar portion 15a and the seat surface 19a, and since the adjustment nut 15 is braked and cannot rotate, the toggle support 11 does not rattle and the position does not change. Nor.

On the other hand, when the position of the mold clamping device is adjusted, the adjusting nut 15 has a small frictional resistance, and therefore can rotate smoothly.

Therefore, the movable platen 35 when the mold is opened and closed
The toggle support 11 does not move due to the inertia of the mold, so that the accuracy of mold opening and closing can be sufficiently ensured, and the position of the toggle support 11 can be easily and accurately adjusted by rotating the adjustment nut 15. You can

Next, a second embodiment of the present invention will be described. It should be noted that description of the same structure and the same operation as those of the first embodiment will be omitted.

FIG. 5 is a sectional view of a toggle support position adjusting device according to the second embodiment of the present invention.

In this embodiment, the toggle support 1
A brake device is arranged on the back side of the No. 1. The brake device has a leg portion attached to a support frame 52 attached to the outer periphery of the toggle support 11, a brake cylinder device 53 as a brake plate drive device, and
A brake plate 55 attached to a brake piston 54 of the brake cylinder device 53 is provided. The brake plate 55 has an insertion hole into which the end of the tie bar 12 is inserted, and the front surface of the brake plate 55 is arranged so as to face the back surface of the planetary gear 21.

Incidentally, the nut recess 59 formed on the back surface of the toggle support 11 does not have a step, and the small diameter portion on the front side of the adjusting nut 15 is fitted therein, and the flange portion 15 is formed.
“A” faces the back surface of the toggle support 11. Also,
The toggle support 11 has a rear surface provided with an insertion hole into which a small-diameter portion on the rear surface side of the adjustment nut 15 is inserted.
An adjustment nut support member 51 as a support member for covering the is attached. The adjustment nut support member 51 is provided with a recess 56 into which the flange 15a of the adjustment nut 15 is fitted.

Here, the brake cylinder device 53
Is actuated by a pressurized fluid supplied from a pressurized fluid supply source (not shown), and moves the brake piston 54 left and right in the figure. The pressurized fluid is air,
A fluid such as water or oil, which is supplied into the pressurized fluid chambers on both sides of the brake piston 54 via a pipe line (not shown). The pressurizing fluid supply source includes a pressurizing pump, an accumulator, a pipe line, a regulating valve arranged in the pipe line, and the operation of the brake cylinder device 53 is controlled by a controller or the like. A predetermined amount of pressurized fluid having a predetermined pressure is supplied into the fluid chamber.

When adjusting the position of the mold clamping device,
The brake piston 54 is moved to the left in the drawing together with the brake plate 55, and as shown in the drawing,
A gap is opened between the front surface of the brake plate 55 and the back surface of the planetary gear 21. As a result, the force for pressing the collar portion 15a of the adjusting nut 15 against the back surface of the toggle support 11 is released, that is, the pressing is released, and the adjusting nut 15 can freely rotate.

When the position of the mold clamping device is not adjusted, that is, in a normal state, the brake piston 54 is moved rightward in the drawing together with the brake plate 55. Then, the front surface of the brake plate 55 presses the back surface of the planetary gear 21, that is, the brake plate 55 presses the planetary gear 21, so that the front surface of the flange portion 15 a is pressed against the back surface of the toggle support 11. As a result, no gap is created between the brake plate 55 and the planetary gear 21, and between the collar portion 15a and the toggle support 11, and the brake plate 55, the planetary gear 21, and the collar portion 15a. Toggle support 11
Stick to each other.

Then, the frictional resistance between the front surface of the brake plate 55 and the rear surface of the planetary gear 21, and the collar portion 1
Due to the frictional resistance between the front surface of 5a and the back surface of the toggle support 11, the planetary gear 21 and the adjusting nut 15 are
The brake is applied, and it cannot rotate. The brake plate 55 is used for all planetary gears 2
It can be pressed against the back of 1.

As described above, in the present embodiment, the brake plate 55 is arranged on the back surface of the planetary gear 21,
The brake plate 55 is a brake cylinder device 53.
Is usually pressed against the back surface of the planetary gear 21 to adjust the position of the mold clamping device.
1 is separated from the back surface.

Therefore, normally, the brake plate 5
5, planetary gear 21, flange 15a and toggle support 11
There is no rattling between them, and the planetary gear 21 and the adjustment nut 15 are braked and cannot rotate, so the toggle support 11 does not rattle, and
The position does not change.

On the other hand, when the position of the mold clamping device is adjusted, the adjusting nut 15 has a small frictional resistance, and therefore can rotate smoothly.

Further, since the brake plates 55 are pressed against the rear surfaces of all the planetary gears 21, all the planetary gears 21 and the adjusting nuts 1 can be operated by operating the single brake cylinder device 53.
5 can be braked and the construction and operation of the braking device can be simplified.

Therefore, the movable platen 35 when the mold is opened and closed
The toggle support 11 does not move due to the inertia of the mold, so that the accuracy of mold opening and closing can be sufficiently ensured, and the position of the toggle support 11 can be easily and accurately adjusted by rotating the adjustment nut 31. You can

Next, a third embodiment of the present invention will be described. It should be noted that description of the same structure and the same operation as those of the first and second embodiments will be omitted.

FIG. 6 is a sectional view of a toggle support position adjusting device according to the third embodiment of the present invention.

In this embodiment, the nut recess 19 is used.
An annular groove is formed on the cylindrical side surface of the small diameter portion of the annular seal member 6 such as an O-ring or an oil seal.
5 are accommodated. Further, since the inner peripheral surface of the seal member 65 is in close contact with the outer peripheral surface of the small diameter portion of the adjusting nut 15,
The outer peripheral surface of the small diameter portion of the adjusting nut 15 and the nut recess 1
The inner peripheral surface of the small-diameter portion of 9 is sealed by the sealing member 65. Since the depth dimension of the large diameter portion of the nut recess 19 is larger than the thickness dimension of the collar portion 15a of the adjusting nut 15, the collar portion 15a is
The rear surface of is retracted from the rear surface of the toggle support 11 to the right in the figure.

A support plate 61 as a support member is attached to the back surface of the toggle support 11 in an airtight or liquid-tight manner. An insertion hole into which the small diameter portion of the adjusting nut 15 is inserted is formed in the support plate 61, and an annular groove is formed on the cylindrical side surface of the insertion hole, and an O-ring or an oil seal is formed in the groove. An annular seal member 64 is accommodated. The inner peripheral surface of the seal member 64 has an adjusting nut 15
Since it is in close contact with the outer peripheral surface of the small diameter part of
Between the outer peripheral surface of the small diameter portion of 5 and the inner peripheral surface of the insertion hole,
It is in a state of being sealed by the sealing member 64. A seal member 66 is housed in the support plate 61 in order to make the space between the support plate 61 and the toggle support 11 airtight.

Here, since the back surface of the collar portion 15a is located more to the right than the back surface of the toggle support 11 in the drawing, the back surface of the collar portion 15a and the support plate 61 are located.
A space 63 as a brake device is formed between and. The support plate 61 is attached to the back surface of the toggle support 11 in an airtight or liquid-tight manner, between the outer peripheral surface of the small diameter portion of the adjustment nut 15 and the inner peripheral surface of the small diameter portion of the nut recess 19 and between the adjustment nut 15. The seal member 64 and the seal member 6 are provided between the outer peripheral surface of the small diameter portion and the inner peripheral surface of the insertion hole.
Since it is sealed by 5, the space 63 is in an airtight or liquidtight sealed state.

In addition, the support plate 61 is formed with a through hole 62 for supplying a pressurized fluid as a pressurizing means to the space 63. Then, a pipe line (not shown) is connected to the communication hole 62, and a pressurized fluid from a pressurized fluid supply source (not shown) is supplied into the space 63, as in the second embodiment. .

When the position of the mold clamping device is not adjusted,
That is, normally, the pressurized fluid is supplied into the space 63, and the flange portion 15a of the adjusting nut 15 is pushed rightward in the drawing. Then, the pressure in the space 63 rises, and the front surface of the collar portion 15a is pressed against the seat surface 19a of the nut recess 19. Thereby, the collar portion 15a
There is no gap between the front surface of the adjustment nut 15 and the seat surface 19a of the nut recess 19, and the adjustment nut 15 and the toggle support 11 are in close contact with each other. As a result, the adjustment nut 15
Becomes locked and cannot rotate.

When adjusting the position of the mold clamping device, the supply of the pressurized fluid is stopped. Then, the space 63
The internal pressure decreases, and the front surface of the flange 15a is not pressed against the seat surface 19a of the nut recess 19.
As a result, the front surface of the flange portion 15a and the nut recess 19 are formed.
A clearance is formed between the adjustment nut 15 and
And the toggle support 11 are separated from each other. The space 63 can be sucked after the supply of the pressurized fluid is stopped. Further, as the pressure releasing means, the pressurized fluid may be supplied between the collar portion 15a and the seat surface 19a. In this case, the pressure in the space 63 further decreases and becomes a negative pressure, and the collar portion 15a is positively moved to the left in the drawing, so that the adjustment nut 15 and the toggle support 11 are largely separated from each other. .

As described above, in this embodiment, the space 63 is formed between the support plate 61 and the back surface of the flange 15a of the adjusting nut 15, and the pressurized fluid is supplied into the space 63. Thus, the front surface of the collar portion 15a is pressed against the seat surface 19a of the nut recess 19, that is, pressed.

Therefore, normally, the collar portion 15a and the seat surface 1 are
Since there is no rattling between 9a and the adjusting nut 15 is braked and cannot rotate, the toggle support 11 does not rattle and the position does not change.

On the other hand, when the position of the mold clamping device is adjusted, the adjusting nut 15 has a small frictional resistance and therefore can rotate smoothly. Further, when the pressurized fluid is oil, the oil penetrates into the gap between the adjusting nut 15 and the nut recess 19 and functions as a lubricating oil. It can rotate smoothly.

Therefore, the movable platen 3 when the mold is opened and closed
The toggle support 11 does not move due to the inertia of 5, so that the accuracy of mold opening / closing can be sufficiently ensured, and the position of the toggle support 11 can be easily and accurately adjusted by rotating the adjustment nut 31. be able to.

Next explained is the fourth embodiment of the invention. It should be noted that description of the same structures and operations as those of the first to third embodiments will be omitted.

FIG. 7 is a sectional view of a toggle support position adjusting device according to the fourth embodiment of the present invention.

In the present embodiment, similarly to the third embodiment, an annular groove is formed on the cylindrical side surface of the small diameter portion of the nut recess 19 and the seal member 65 is housed in the groove. Further, since the depth dimension of the large diameter portion of the nut recess 19 is larger than the thickness dimension of the flange portion 15a of the adjusting nut 15, the back surface of the flange portion 15a is larger than the back surface of the toggle support 11 in the drawing. It is located rightward.

An annular groove is formed on the cylindrical side surface of the large diameter portion of the nut recess 19, and an annular seal member 74 such as an O-ring or an oil seal is housed in the groove.
Further, since the inner peripheral surface of the seal member 74 is in close contact with the outer peripheral surface of the flange portion 15a of the adjusting nut 15, the adjusting nut 15
The outer peripheral surface of the collar portion 15a and the inner peripheral surface of the large diameter portion of the nut recess 19 are sealed by the seal member 74.

A support plate 71 as a support member is attached to the back surface of the toggle support 11. The support plate 71 is formed with an insertion hole into which the small diameter portion of the adjusting nut 15 is inserted. Here, since the back surface of the collar portion 15a is located more to the right than the back surface of the toggle support 11 in the drawing, the back surface of the collar portion 15a and the front surface of the support plate 71 are separated from each other and the brake is applied. A space as a device is formed. Then, a spring member 72 as a pressing means is arranged between the back surface of the collar portion 15a and the front surface of the support plate 71. The spring member 72 is, for example, a spring washer, but may be a coil spring, a rubber bush, an air spring, or the like, and may be any kind. Further, the spring member 72 has the collar portion 1.
It is desirable that the portion where the back surface of 5a and the front surface of the support plate 71 contact each other be smooth and have a small frictional resistance.

The toggle support 11 has a through hole 73 as a pressure releasing means for supplying a pressurized fluid between the front surface of the collar portion 15a and the seat surface 19a. Then, a conduit (not shown) is connected to the conduction hole 73, and like the second and third embodiments,
Pressurized fluid from a pressurized fluid supply source (not shown) is supplied between the front surface of the collar portion 15a and the seat surface 19a.

When the position of the mold clamping device is not adjusted,
That is, in a normal case, the collar member 15a is pushed rightward in the drawing by the spring member 72, so that the collar unit 1
The front surface of 5a is pressed against the seat surface 19a of the nut recess 19. As a result, there is no gap between the front surface of the collar portion 15a and the seat surface 19a of the nut recess 19, and the adjustment nut 15 and the toggle support 11 are in close contact with each other. As a result, the adjustment nut 15 is in a braked state and cannot rotate.

When adjusting the position of the mold clamping device, the pressurized fluid is supplied between the front surface of the collar portion 15a and the seat surface 19a, so that the pressure of the pressurized fluid causes the collar portion 15a to move.
a is pushed to the left in the figure. Then, the force that pushes the collar portion 15 a by the pressurized fluid is applied to the spring member 72.
When the force becomes larger than the force of the above, the collar portion 15a moves to the left in the figure, a gap is created between the front surface of the collar portion 15a and the seat surface 19a, and the adjustment nut 15 and the toggle support 11 are separated from each other. To do.

As described above, in the present embodiment, the spring member 72 is arranged between the collar portion 15a of the adjusting nut 15 and the support plate 71, and the front surface of the collar portion 15a is provided with the nut recess 1a.
9 is pressed against the seat surface 19a, that is, pressed, and pressurized fluid is supplied between the front surface of the collar portion 15a and the seat surface 19a to separate the front surface of the collar portion 15a from the seat surface 19a. That is, the pressure is released.

Therefore, normally, the collar portion 15a and the seat surface 1 are
Since there is no rattling between 9a and the adjusting nut 15 is braked and cannot rotate, the toggle support 11 does not rattle and the position does not change.

On the other hand, when the position of the mold clamping device is adjusted, the adjusting nut 15 has a small frictional resistance and therefore can rotate smoothly. Further, the spring member 72 has the collar portion 1.
The part where the back surface of 5a and the front surface of the support plate 71 come into contact with each other is smooth and has a small friction resistance, so that the adjusting nut 15 can rotate smoothly.

Therefore, the movable platen 3 when the mold is opened and closed
The toggle support 11 does not move due to the inertia of 5, so that the accuracy of mold opening and closing can be sufficiently ensured, and the position of the toggle support 11 can be easily and accurately adjusted by rotating the adjustment nut 15. be able to.

Next explained is the fifth embodiment of the invention. It should be noted that description of the same structures and operations as those of the first to fourth embodiments will be omitted.

FIG. 8 is a sectional view of a toggle support position adjusting device according to the fifth embodiment of the present invention.

In the present embodiment, the recess into which the adjusting nut 15 is fitted is formed as the nut recess 19 in the brake support plate 16. A recess 29 for accommodating the spring member 22, the electromagnet 27 and the brake plate 17 is continuously formed in the inner part of the nut recess 19. On the other hand, the bearing surface 19a of the toggle support 11 is flat as shown in the figure, since the recess into which the adjusting nut 15 is fitted is not formed.

In this case, the collar portion 15a, the spring member 22, the electromagnet 27, and the brake plate 17 are housed in the recess portion 29 and the nut recess portion 19, respectively. Therefore, when the dimensions of the collar portion 15a, the spring member 22, the electromagnet 27, and the brake plate 17 are changed, it is necessary to change the dimensions such as the depth of the recess 29 or the nut recess 19. On the other hand, the seat surface 19a of the toggle support 11 is not formed with a recess for accommodating the collar portion 15a, the spring member 22, the electromagnet 27, and the brake plate 17. Therefore, when the design of the position adjusting device is changed, there is no need to change or rework the toggle insert 11, which is a large and difficult-to-handle member, and the brake support plate 16 is a small and easily-to-handle member. Can be dealt with by changing or reworking.

Next explained is the sixth embodiment of the invention. It should be noted that description of the same structures and operations as those of the first to fifth embodiments will be omitted.

FIG. 9 is a sectional view of a toggle support position adjusting device according to the sixth embodiment of the present invention.

In the present embodiment, the recess into which the adjusting nut 15 is fitted is the support plate 61 as the nut recess 19.
Is formed. In addition, at the back of the concave portion 19 for the nut,
A space 63 as a brake device is continuously formed. Further, the support plate 61 is formed with a through hole 62 for supplying a pressurized fluid as a pressurizing means to the space 63. Then, a pipe line (not shown) is connected to the conduction hole 62, and a pressurized fluid from a pressurized fluid supply source (not shown) is supplied into the space 63, as in the second embodiment. . On the other hand, the seating surface 19a of the toggle support 11 is flat as shown in the figure, since the recess into which the adjusting nut 15 is fitted is not formed.

In this case, the nut recess 19 and the space 63 are formed in the support plate 61. On the other hand, no recess is formed on the seat surface 19a of the toggle support 11. Therefore, when changing the design of the position adjusting device, the toggle insert 11, which is a large-sized and difficult-to-handle member, is changed,
It is not necessary to rework, and it can be dealt with by changing or reworking the support plate 61 which is a small-sized and easy-to-handle member.

In the above embodiment, the horizontal type injection molding machine in which the movable platen moves in the horizontal direction (horizontal direction) has been described. However, in the movable mold supporting apparatus of the present invention, the movable platen is in the vertical direction. It can also be applied to a vertical injection molding machine that moves in the (vertical direction). Further, the movable mold supporting device of the present invention can be applied to a molding machine such as a die cast machine and an IJ sealing press, in addition to the injection molding machine.

Further, the present invention is not limited to the above-mentioned embodiments, but can be variously modified within the scope of the present invention, and they are not excluded from the scope of the present invention.

[0111]

As described above in detail, according to the present invention, in the mold clamping device of the molding machine, the guide member having the screw formed at the end portion and the seating surface formed at the rear surface side, ,
A mold clamping mechanism supporting member having a guide member insertion hole, an adjusting nut screwed with a screw of the guide member, a gear attached to a rear end surface of the adjusting nut, and the gear and the mold clamping mechanism supporting member. It has a support member attached so as to be located between the back surface and supporting the adjustment nut, and a brake device capable of pressing the adjustment nut against the seat surface.

In this case, since the brake device presses the adjustment nut against the seat surface, rattling does not occur between the adjustment nut and the toggle support, and the toggle support is also supported by the inertia of the movable platen when the mold is opened and closed. It is possible to secure sufficient accuracy of opening and closing the mold without moving. Further, since the brake device releases the adjustment nut from pressing against the seat surface, the adjustment nut can rotate smoothly, and the adjustment nut can be easily rotated to adjust the position of the toggle support.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a position adjusting device for a toggle support according to a first embodiment of the present invention, and is an enlarged view of a B part in FIG.

FIG. 2 is a cross-sectional view of a conventional toggle support position adjusting device.

FIG. 3 is a schematic view of an injection molding machine according to the first embodiment of the present invention.

FIG. 4 is a view on arrow A of the toggle support according to the first embodiment of the present invention.

FIG. 5 is a sectional view of a toggle support position adjusting device according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of a toggle support position adjusting device according to a third embodiment of the present invention.

FIG. 7 is a cross-sectional view of a toggle support position adjusting device according to a fourth embodiment of the present invention.

FIG. 8 is a cross-sectional view of a toggle support position adjusting device according to a fifth embodiment of the present invention.

FIG. 9 is a cross-sectional view of a toggle support position adjusting device according to a sixth embodiment of the present invention.

[Explanation of symbols]

11 Toggle support 12 tie bar 14 Tie bar insertion hole 15 Adjustment nut 15a Tsuba part 17,55 Brake plate 19a seat surface 22, 72 Spring member 27 electromagnet 53 Brake cylinder device 62, 73 Conduction hole 63 space

Claims (12)

[Claims] 1. A guide member having (a) an end formed with a screw, (b) a mold clamping mechanism support member having a seat surface formed on the back side and having a guide member insertion hole, and (c). An adjusting nut screwed into the screw of the guide member, (d) a gear attached to the rear end surface of the adjusting nut, and (e) located between the gear and the back face of the mold clamping mechanism support member. A mold clamping device for a molding machine, comprising: a support member that is mounted in such a manner as to support the adjustment nut; and (f) a brake device that can press the adjustment nut against the seat surface. 2. The mold clamping device for a molding machine according to claim 1, wherein the brake device is provided with a pressing release means. 3. The mold clamping device for a molding machine according to claim 1, wherein a recess is formed on the back surface side of the mold clamping mechanism support member, and the adjusting nut is fitted into the recess. 4. The mold clamping device for a molding machine according to claim 1, wherein a recess is formed in the support member on the mold clamping mechanism support member side, and the adjustment nut is fitted into the recess. 5. The mold clamping device for a molding machine according to claim 1, wherein the adjusting nut includes a flange portion that protrudes in a radial direction. 6. The mold clamping device for a molding machine according to claim 1, wherein the brake device includes a brake plate and a brake plate drive device that moves the brake plate. 7. The molding machine according to claim 6, wherein the brake plate presses the adjustment nut, and the brake plate driving device is a spring member and an electromagnet that attracts the brake plate against the spring member. Mold clamping device. 8. The mold clamping device for a molding machine according to claim 6, wherein the brake plate presses the gear, and the brake plate driving device is a cylinder device operated by a pressurized fluid. 9. The brake device is a space portion provided between the adjusting nut and the support member and provided with a pressurizing means for pressing the adjusting nut against the seat surface. The mold clamping device of the molding machine according to any one of 1. 10. The mold clamping device for a molding machine according to claim 9, wherein the pressurizing means is a pressurized fluid supplied into the space. 11. The mold clamping device for a molding machine according to claim 9, wherein the pressing means is a spring member disposed in the space. 12. The mold clamping of a molding machine according to claim 9, wherein the brake device includes a pressure release means for supplying a pressurized fluid between the adjusting nut and the seat surface. apparatus.