JPH07232360A - Rotary type mold clamping device and rotary type injection molder used thereof - Google Patents

Abstract

PURPOSE:To provide a rotary type mold clamping device equipped with a safety door, the opening and closing operation of which is easy and which can be widely opened when released. CONSTITUTION:A safety door 34 consists of a plurality of doors 36 and 38, which are respectively and reciprocatingly movably arranged and one of which is placed upon the other at one travelling end side when released. On the other hand, transmission devices 60, 62, 64, t.6 and 68, which interlockingly move a plurality of the doors 36 and 38 to the same direction at working speeds different from one another, are provided so as to slidingly move a plurality of the doors 36 and 38 from their completely closed position to their completely opened position under the condition being interlocked with one another.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a rotary type mold clamping device and a rotary type injection molding machine using the same, and particularly to opening and closing laterally of a mold clamping space formed between opposed surfaces of a fixed platen and a movable platen. The present invention relates to a rotary mold clamping device having a possible safety door and a rotary injection molding machine using the same.

[0002]

2. Description of the Related Art A rotary mold clamping device has a structure in which a rotary disk is disposed on either one of a fixed disk and a movable disk so as to face the other, and at a plurality of rotational positions of the rotary disk. By the approaching operation of the movable platen with respect to the fixed platen, a plurality of sets of molds arranged on the rotating platen and the fixed platen or the movable plate opposite to the rotating platen can be simultaneously clamped.
In addition, such a rotary mold clamping device can be generally used for various molding operations, and in particular, a combination of a plurality of types of molds can be easily realized by rotating a rotary disk. Therefore, it is possible to easily perform multicolor molding, insert molding, and the like, and in the case of monochromatic molding, it is possible to simultaneously perform a plurality of moldings using a plurality of sets of molds.

Further, in a rotary type mold clamping device, in order to prevent accidents such as foreign matter between the molds to be clamped or a human body of an operator being caught, safety is generally ensured by a fixed platen and a movable platen. A safety door that can be opened and closed is arranged on the side of the mold clamping space formed between the facing surfaces of the board, and manual insertion work during insert molding is performed by opening this safety door. , The mold is closed and clamped with the safety door closed.

By the way, in order to secure sufficient workability such as insert work performed by opening the safety door, it is desirable that the frontage (opening width) when the safety door is opened is sufficiently large. Generally, in a rotary mold clamping device, an injection molding machine and a molded product take-out machine are installed on both sides of the mold clamping space, so that the safety door and the opening / closing space are limited. Will end up.

Therefore, conventionally, for example, a safety door is composed of two doors which can be reciprocally slidably moved like a sliding door, and one door is moved to the other door side when they are opened to overlap each other. A safety door that can be compactly packed was used, but with a safety door with such a structure, it is possible to secure a frontage at the time of opening only up to the width of one sheet, inserts etc. There was a problem that the workability of was poor.

[0006]

The present invention has been made in view of the circumstances as described above, and the problem to be solved by the present invention is that it is advantageously installed in a limited space,
It is an object of the present invention to provide a rotary mold clamping device equipped with a safety door that can advantageously ensure a large opening width when opened, and a rotary injection molding machine using the rotary mold clamping device.

Another object of the present invention is to provide a rotary type mold clamping device having a safety door which can be opened and closed easily and quickly, and a rotary type injection molding machine using the rotary type mold clamping device. .

[0008]

In order to solve such a problem, a feature of the present invention resides in that a rotary disk is disposed on either one of a fixed disk and a movable disk, and the rotary disk and the fixed disk and the movable disk are provided. In a rotary mold clamping device in which a plurality of sets of molds are simultaneously clamped to either side of the board and a safety door that can be opened and closed is arranged on the side of the mold clamping space. , The safety door is configured by a plurality of doors that are reciprocally movable and overlapped at one moving end side when opened, while the plurality of doors are interlocked in the same direction at different operating speeds. The transmission mechanism is provided so that the plurality of doors can be slid in conjunction with each other from the fully closed position to the fully opened position.

In this case, the transmission mechanism includes a pulley such as a sprocket and a pulley and a winding conductor wound around them, a gear, a rack and pinion mechanism, or a link mechanism. Things, etc.
It can be constituted by various conduction mechanisms.

The plurality of doors may be supported by various guide structures, for example, may be supported in a suspended state by rails extending in the moving direction.

In addition, as a guide structure for such a door, by attaching the door to a slide bush slidably attached to a rod-shaped rail, the door is movably supported by the rail via the slide bush. Is also possible.

Further, the opening operation direction of the door is set to a specific direction, and the guide member for guiding and supporting the door is arranged so as to extend for a predetermined length only on the opening operation side of the door in the closed state of the door. May be.

Further, a safety door is constituted by an inner door and an outer door having substantially the same width dimension, and the moving speed of the inner door and the outer door located on the front side in the moving direction at the time of the opening operation is set to the rear side. It is also advantageous to configure the transmission mechanism to be approximately half the speed of movement of the door located on the side.

Furthermore, such a transmission mechanism that makes the moving speed of the door located on the front side in the moving direction at the time of opening operation approximately half the moving speed of the door located on the rear side is, for example, the opening operation of the door. The direction is set to a specific direction, and a pair of pulleys are arranged at both ends in the moving direction of the door located on the front side in the moving direction at the time of opening operation, and a winding conductor is placed in parallel between the pair of pulleys. Fixing either one of the upper part and the lower part of the winding conductor to a door located on the rear side in the moving direction during the opening operation of the inner door and the outer door at a predetermined position. It can be advantageously constructed by fixing either the upper part or the lower part of the mold to the mold clamping device body in position.

Further, it is possible to provide a driving means for moving the door in the opening / closing direction by applying a driving force to the door or the transmission mechanism.

Further, as described above, while the injection device and the product take-out device are arranged on both sides of the mold clamping space in the rotary mold clamping device having the structure according to the present invention, respectively, the injection device and the product ejecting device are arranged. A rotary injection molding machine in which a safety door having the above-described structure is disposed on at least one of both sides facing each other across the mold clamping space in the direction orthogonal to the facing direction of the product unloading device The present invention is characterized.

[0017]

EXAMPLES Examples of the present invention will now be described in detail with reference to the drawings in order to clarify the present invention more specifically.

First, FIGS. 1 and 2 show the main parts of the plane and side surfaces of a rotary type mold clamping device as an embodiment of the present invention. The rotary type mold clamping device is
Fixed platen 10 fixedly attached to a base (not shown)
In addition, four tie bars 12 are vertically installed at four corners of the fixed board 10, and the movable board 14 is supported by these tie bars 12.
Are arranged so as to face the fixed platen 10. The movable platen 14 is driven in a direction toward and away from the fixed platen 10 by a driving device such as a hydraulic cylinder (not shown).

Further, the fixed platen 10 is provided with a disk-shaped rotary platen 16 as a rotary plate on the surface facing the movable platen 14 so as to face the movable platen 14. .
Further, the rotary platen 16 is rotated around a central axis parallel to the facing direction of the fixed platen 10 and the movable platen 14 by a rotary drive device such as an indexing machine (not shown), and positioning control is performed at a predetermined rotation position. It is supposed to be done.

A plurality of sets (four sets in this embodiment) of fixed molds 18 and movable molds 20 are attached to the facing surfaces of the rotary platen 16 and the movable platen 14 which are positioned to face each other. There is. As a result, each of the four fixed molds 1 is determined according to the rotational position of the rotary platen 16.
In a predetermined combination of the movable mold 8 and the movable mold 20, the molds 18 and 20 are clamped and pressed simultaneously between the fixed platen 10 and the movable platen 14, respectively.

Further, in the mold clamping device having such a structure, the first injection device 22 is provided on both sides of the mold clamping space formed between the facing surfaces of the fixed platen 10 and the movable platen 14.
A first ejecting device 24, a second ejecting device 26, and a second ejecting device 28 are respectively arranged. As a result, a predetermined molding material is injected and filled by the first injection device 22 and the second injection device 26 into the molding cavity of the mold clamped between the fixed platen 10 and the movable platen 14. After cooling and opening the mold, the molded product is taken out by the first take-out device 24 and the second take-out device 28 and sent to the first take-out port 30 and the second take-out port 32.

Further, one side (first and second sides) of both sides of the mold clamping space sandwiched in the direction orthogonal to the opposing direction of the first injection device 22 and the second injection device 26. A safety door 34 that can be opened and closed is provided on the front side of the mold clamping device where the outlets 30 and 32 are located. This safety door 34
As shown in the front view of FIG. 3, the inner door 36 and the outer door 3 are slidably arranged in the horizontal direction.
8 and is configured to open and close like a sliding door.

More specifically, on the front side of the mold clamping device, on both sides in the width direction thereof, a pair fixed to the upper part of the mold clamping device body and extending downward by a length reaching the vicinity of the mold clamping space. The support arms 40, 40 are provided, and a flat plate-shaped support frame 41 is attached across the lower ends of the support arms 40, 40. Then, with respect to the support frame 41, two rails 42, 42 extending in parallel in the horizontal direction are provided, and a plurality of rail brackets 44 are provided.
Are attached to each other with a predetermined distance therebetween.

The rail 42 has a rod-like shape with a constant cross-section in the longitudinal direction. In particular, in this embodiment, a hollow pipe-like shape with a circular cross-section is adopted.
The mold clamping space is arranged so as to extend over substantially the entire length of the opening on the front side of the apparatus. Also,
The two rails 42, 42 are connected to each other by rail holders 46 at both ends in the axial direction, and the rails 42, 42 are provided inside the rail holder 46.
The cushioning material 48 is attached to each of the two end portions of the.

Then, as shown in the enlarged view of the main part in FIG. 4, the inner door 36 and the outer door 38 are respectively attached to the sliding bushes 50 fitted on the rails 42, 42.
The inner door 36 and the outer door 38 are supported by the door brackets 52, 54 fixed to both ends in the width direction (moving direction) so as to be reciprocally movable in the longitudinal direction of the rails 42, 42. ing. In particular, in this embodiment, the inner and outer doors 36 and 38 are both supported in a suspended state by the rails 42 and 42 above the half thereof, and the mold pressure is increased by opening the doors 36 and 38. The lower part of the closing space is designed to be largely opened.

Further, the outer door 38 is the inner door 36 during the opening / closing operation.
Via an L-shaped bracket 56 extending so as to straddle the upper side of the inner door 36 so as to be overlapped and moved on the outer side of
The inner and outer doors 3 are attached to the door bracket 54.
When the doors 6, 38 are opened, the outer door 38 is superposed on the outer side of the inner door 36. The materials of the inner door 36 and the outer door 38 are not particularly limited, but in this embodiment, the central portion is formed of a transparent plate such as acrylic, and the inner and outer doors 36, 38 are kept closed. The mold clamping space can be seen from the outside.
Further, a handle 70 for manual operation is provided on the outer door 38 in a protruding manner.

As the sliding bush 50, those having various structures such as those formed of resin or oil-impregnated metal can be adopted, but in particular, the linear motion provided with a plurality of rows of balls extending in the axial direction. If a ball bearing of the shape is adopted, sliding resistance at the time of opening / closing the inner and outer doors 36, 38 is advantageously reduced, and excellent operability can be exhibited.

The inner door 36 and the outer door 38 are
Each of them has a width dimension slightly larger than 1/3 of the total length of the rails 42, 42, and the opening operation direction is set to the left direction in FIG. That is, in FIG.
The safety door opening operation is performed by moving the left and right doors 6, 38 to the left and the rails 42,
The safety door is opened by overlapping and positioning it at the left end portion of 42, while the safety door is closed by moving the inner and outer doors 36 and 38 to the right. The safety door can be closed by positioning 38 at the right end of the rails 42, 42 and the inner door 36 at the center of the rails 42, 42, respectively. The left and right ends of the rails 42 and 42, on which the inner and outer doors 36 and 38 are superposed and positioned when the safety door is opened, have a shield plate 5 having substantially the same shape as the inner and outer doors 36 and 38.
8 is provided, and the inner and outer doors 36 and 3 are provided when the safety door is closed.
The left end portions of the rails 42, 42 on which 8 is not located are closed.

Further, the inner and outer doors 36, 38 are provided with a transmission mechanism so that they can be moved in conjunction with each other. In this embodiment, as the transmission mechanism, a structure based on a movable single pulley including a sprocket, which is a kind of pulley, and a chain, which is a kind of winding transmission body, is adopted.

More specifically, first, the inner door 36 is attached to the door brackets 52, 52 fixed to both ends in the width direction, so that the first and second sprockets 60 having substantially the same diameter, respectively. , 62 are mounted, and a chain 64 is placed between the sprockets 60, 62.
However, it is wound in parallel. The upper part of the chain 64 hung in parallel is fixed to the door bracket 54 fixed to the outer door 38 by the fixing bracket 66, while the chain 6
The lower part of 4 is fixed to the support frame 41 of the mold clamping device main body by a fixing bracket 68.

As shown in FIGS. 1 and 3, the fixed position of the chain 64 on the outer door 38 and the support frame 41 does not hinder the opening / closing operation of the inner and outer doors 36, 38. With the inner and outer doors 36 and 38 closed,
First sprocket 60 side and second sprocket 6
The two sides are set close to each other.

That is, in such a transmission mechanism, the inner door 36 is interlocked with the outer door 38 at an operating speed of 1/2 and an operating process based on the principle of the movable single pulley. Outer door 38 "A" as shown.
When the outer door 38 is moved and opened by only "A / 2", the inner door 36 is also opened, and conversely, when the outer door 38 is moved by "A" and closed from the open state, the inner door 36 is opened. Three
6 will also be closed in conjunction with "A / 2".

Therefore, the safety door 3 having the above-mentioned structure
In the mold clamping device provided with 4, the inner door 36 is also interlocked by opening and closing only the outer door 38, and the safety door 34 is opened and closed as a whole.
Since both 38 are slidably moved, the opening width when the safety door 34 is opened can be advantageously secured.

Further, in the safety door 34, since only the outer door 38 needs to be operated, there is an advantage that the opening and closing work of the safety door 34 can be performed extremely easily and quickly.

Further, in this embodiment, the inner and outer doors 36, 38 are provided.
Is suspended and supported by the rails 42, 42, and since the rail and the like are not disposed in the lower portion of the mold clamping space and can be largely opened, the safety door 34 can be opened. The workability when performing the insert work or the like on the fixed mold 18 positioned in the lower part of the mold clamping space is further advantageously improved. It should be noted that the insert work into the mold can be sequentially performed for the mold moved to the front side (the inner and outer doors 36, 38 side) by rotating the rotary platen 16, and thereby, it is more excellent. Workability can be secured.

Further, in this embodiment, the safety door 34 is provided inside and outside.
Since the doors 36 and 38 are composed of one sheet, there is an advantage that both doors 36 and 38 can be interlocked by a simple transmission mechanism and a sufficient opening width of the door can be obtained.

Although one embodiment of the present invention has been described in detail above, this is a literal example, and the present invention should not be construed as being limited to such a specific example.

For example, in the above embodiment, the inner and outer doors 36, 3
8 was supported in a suspended state by two rails 42, 42, but the support structure of the door is not limited in any way, and rails arranged above and below may be used, or one rail may be used. It is also possible to support the door.

Further, in the above embodiment, the inner and outer doors 36, 38 are provided.
Although the opening / closing direction of each of the above is determined, it may be opened / closed in any direction.

Furthermore, in the above embodiment, the inner and outer doors 36,
The transmission mechanism for interlocking 38 was constituted by a movable single pulley structure using a sprocket and a chain, but instead of the sprocket, a pulley, a V pulley, etc. are used,
It is of course possible to use a flat belt, a V-belt or the like instead of the chain, and it is also possible to employ a transmission mechanism other than the movable single pulley structure. For example, the inner and outer doors 36 and 38 are interlocked at different speeds by using a compound pulley type pulley having a different diameter and a winding transmission body or a rack or the like, or the inner and outer doors 36 and 38 are interlocked at different speeds by a link mechanism. It is possible to employ a transmission mechanism or the like.

Further, in the above embodiment, the safety door is composed of the two doors 36 and 38, but the safety door can be composed of three or more doors. And
If the safety door is composed of three or more doors, by stacking those doors when the safety door is opened, it becomes possible to make it more compact. Needless to say, when a safety door is composed of three or more doors, the relative interlocking speed ratio in the transmission mechanism should be set in consideration of the movement stroke of each door during the opening / closing operation. .

Although not explicitly shown in the above-mentioned embodiment, the safety door 34 is generally provided with a limit switch, a cam valve, etc., if necessary.
A safety measure will be taken so that the mold opening / closing operation is started after closing the.

Further, it is possible to automate the opening / closing operation of the safety door by providing a door constituting the safety door, a motor for exerting a driving force on the transmission mechanism, and a cylinder mechanism.

In addition, although the rotary platen is provided on the fixed platen 10 side in the mold clamping device in the above-described embodiment, it is of course possible to provide the rotary platen on the movable platen 14 side. Even when the rotary platen is provided on the movable platen 14, any effect such as improvement of insert workability can be effectively achieved.

Although not listed one by one, the present invention can be carried out in variously modified, modified, improved, etc. modes based on the knowledge of those skilled in the art. It goes without saying that all of them are included in the scope of the present invention without departing from the spirit of the present invention.

[0046]

As is apparent from the above description, in the rotary type mold clamping device having the structure according to the present invention, a plurality of doors constituting the safety door are interlocked with each other so that they can be slid and moved. The opening width when the door is opened can be advantageously obtained.

Moreover, the plurality of doors constituting the safety door are
Since they are interlocked with each other, the safety door can be opened and closed by operating or driving any one of the doors, so that the safety door can be opened and closed very easily and quickly.

Further, by suspending and supporting a plurality of doors constituting the safety door, the lower part of the mold clamping space is largely opened when the safety door is opened, so that workability such as insert work is improved. It can be improved more advantageously.

Further, if the opening operation direction of the plurality of doors constituting the safety door is determined and the guide member for guiding and supporting the door is extended and arranged only in the opening operation direction, the opening of the safety door is opened. It is possible to more advantageously reduce the installation space while ensuring a sufficient width.

Furthermore, if the safety door is composed of two doors inside and outside, the inner and outer doors can be interlocked by a simple transmission mechanism, and a sufficient opening width of the door can be obtained.

In particular, the transmission mechanism for interlocking the two doors inside and outside can be advantageously realized by, for example, a movable single pulley structure including a pair of pulleys and a winding transmission body.

Further, in the rotary type mold clamping device having the structure according to the present invention, since the plurality of doors constituting the safety door are interlocked with each other, it is easy to automate the opening / closing operation of the safety door. There is also an advantage that it can be realized.

Further, in the rotary injection molding machine having the structure according to the present invention, the safety door of the mold clamping device is within the space limited by the injection device and the product take-out device arranged on both sides of the mold clamping device. Thus, it is possible to easily install the device while ensuring excellent opening / closing operability and a sufficient opening width at the time of opening.

[Brief description of drawings]

FIG. 1 is an explanatory plan view corresponding to a II cross section in FIG. 2, showing a main part of a rotary mold clamping device as one embodiment of the present invention.

FIG. 2 is a side view showing a main part of the rotary mold clamping device shown in FIG. 1 and corresponding to a II-II section in FIG.

FIG. 3 is a front view showing a safety door used in the rotary mold clamping device shown in FIG. 1.

4 is an enlarged cross-sectional view corresponding to the IV-IV cross section in FIG. 3, showing a main part of a safety door used in the rotary mold clamping device shown in FIG.

[Explanation of symbols]

 10 Fixed Plate 12 Tie Bar 14 Movable Plate 16 Rotating Plate 18 Fixed Mold 20 Movable Mold 22 First Injection Device 24 First Extraction Device 26 Second Injection Device 28 Second Extraction Device 34 Safety Door 36 Inner Door 38 Outer door 42 Rail 50 Sliding bush 60 First sprocket 62 Second sprocket 64 Chain

Claims (8)

[Claims] 1. A rotary plate is disposed on one of a fixed plate and a movable plate, and a plurality of sets of molds are simultaneously clamped between the rotary plate and the other of the fixed plate and the movable plate. In addition, in the rotary type mold clamping device in which a safety door that can be opened and closed is arranged on the side of the mold clamping space, the rotary mold clamping devices are arranged so as to be reciprocally movable, and one moving end side when opened. While the safety door is configured by a plurality of doors that are substantially overlapped with each other, a transmission mechanism that links the plurality of doors in the same direction at different operating speeds is provided, and the plurality of doors are closed from the fully closed position. A rotary type mold clamping device characterized in that it is slidably moved in conjunction with a fully opened position. 2. The rotary mold clamping device according to claim 1, wherein each of the plurality of doors is supported in a suspended state by a rail extending in a moving direction. 3. A slide bush is slidably attached to a rod-shaped rail arranged in the moving direction of the door, and the door is attached to the slide bush, so that the slide bush is inserted through the slide bush. The rotary mold clamping device according to claim 1, wherein the plurality of doors are movably supported by the rails. 4. The opening operation direction of the plurality of doors is determined, and in the closed state of the door, a guide member for guiding and supporting the door extends in a predetermined length only in the opening operation direction of the door. The rotary mold clamping device according to any one of claims 1 to 3, wherein the rotary mold clamping device is provided so as to extend. 5. The safety door is composed of an inner door and an outer door having substantially the same width dimension, and a moving speed of the inner door and the outer door located on the front side in the moving direction at the time of the opening operation. The transmission mechanism is configured so as to be approximately half the moving speed of the door located on the rear side.
The rotary type clamping device according to any one of 1. 6. The opening operation directions of the inner door and the outer door are determined, and a pair of pulleys are provided at both ends in the moving direction of the door located on the front side in the moving direction at the time of the opening operation, and the pair of pulleys are arranged. The winding conductor is hung in parallel between the pulleys, and one of the upper portion and the lower portion of the winding conductor is placed at a predetermined position on the rear side in the moving direction of the inner door and the outer door during the opening operation. 6. The conduction mechanism is configured by fixing the door to the positioned door while fixing the other of the upper portion and the lower portion of the winding conductor to the mold clamping device body at a predetermined position. The described rotary mold clamping device. 7. The rotary mold clamping device according to claim 1, further comprising drive means for moving the door in the opening / closing direction by applying a driving force to the door or the transmission mechanism. 8. The rotary mold clamping device according to claim 1, wherein an injection device and a product unloading device are arranged on both sides of the mold clamping space, respectively.
A rotary type in which the safety door is disposed on at least one of both sides facing each other across the mold clamping space in a direction orthogonal to the facing direction of the injection device and the product unloading device. Injection molding machine.