JPH0669700B2 - How to replace mold and chuck plate - Google Patents

Description

TECHNICAL FIELD The present invention is carried out in the field of molding and processing of synthetic resins by an injection molding machine, particularly in the field of injection molding which requires frequent mold replacement. The present invention relates to a method of exchanging a mold and a chuck plate of a molded product as one set.

2. Description of the Related Art In recent years, in the field of injection molding, there is an increasing demand for high-mix low-volume production. For example, it is not uncommon for a single injection molding machine to require frequent mold changes as many as five times a day.

Therefore, conventionally, various research and development have been carried out in order to facilitate the die exchange work of the injection molding machine, automate it, shorten the required time, and reduce the cost.
6794, JP-B-50-28974, JP-A-50-117077, JP-A-58-222827, JP-A-60-82309, and JP-A-60-137516.

The Japanese Patent Application No. 63-132082 and the drawings by the present applicant also describe an injection molding machine to the same effect.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above, various injection molding machines or mold exchanging apparatuses have been developed to achieve the purpose of facilitating or automating frequent mold exchanging work or shortening the required time. Is getting

On the other hand, recent approaches to labor-saving and unmanned injection molding machines are making full-scale efforts to take out molded products with a take-out machine, which is a kind of robot device. This unloader is equipped with a molded product chuck plate adapted to the shape and size of the molded product in its hand part, and the molded product chuck plate is opened and released from the mold. It is configured so that it can be grabbed and taken out. The molded product chuck plate is changed every time the mold is replaced because it is necessary to match the shape and size of the molded product. By the way, a chuck plate mounting device for facilitating frequent replacement of a chuck plate of a molded product is described in Japanese Utility Model Laid-Open No. 59-157806.

Depending on the situation like this, the mold exchange of the injection molding machine with the unloader attached is complete only when the chuck plate of the molded product is exchanged. However, conventionally, the method and apparatus for exchanging the mold including the molded product chuck plate have not been developed,
Both are only done separately. For example, it is common for an operator to attach a suitable molded product chuck plate to the unloader after automated die replacement. Therefore, it takes time and effort to carry and attach the molded product chuck plate to the unloader from the storage location to the unloader.
Also, there is a big problem that the time required for setup change of work contents is wasted. When the replacement work is performed within the operating range of the mold clamping device of the injection molding machine, the worker must concentrate all his nerves on the confirmation of safety, which is extremely dangerous. Furthermore, there are problems such as the need for a dedicated storage space different from the mold for the storage of many types of molded product chuck plates, which are problems to be solved.

Therefore, an object of the present invention is to provide a replacement method in which a mold and a chuck plate for a molded product are set in one set, and which is easy to mechanize and fully automate.

Means for Solving the ProblemsAs a means for solving the problems of the above-mentioned prior art, the method of exchanging the mold and the molded product chuck plate according to the present invention is as shown in the drawings showing the main process steps of the embodiment. A) The moving side mold 1 is closed to the fixed side mold 2 and the fixed side mold 2 is released from the fixed side die plate 3 to make both molds 1, 2.
(2) Clamping 2 into one and holding it on the moving side die plate 4 as one set, and (b) Retracting the moving side die plate 4 to a position where it can be swung, and the molded product chuck plate 6 of the unloader 5 (C) A step of handing over to the mold to form a set, and c) the moving side die plate 4 is swung together with one set of the molds 1, 2 and the molded product chuck plate 6 to move from the moving side die plate 4 to the moving side mold. 1 to release the mold waiting device 7
And a new mold 1 ', 2'prepared on the mold standby device 7 and a set of the molded product chuck plate 6 are replaced, and d) the new mold 1', 2'and The movable die plate 4 that has received the set of molded product chuck plates 6'is swung again to face the fixed mold plate 3 and the molded product chuck plates 6'installed in the mold are removed by the unloader 5 And (e) moving the movable die plate 4 toward the stationary die plate 3 and holding the stationary die 2 over the stationary die plate 3. Characterize.

Action By closing the moving side mold 1 to the fixed side mold 2, both molds 1 and 2 can be assembled in one set. After that, the fixed-side mold 2 is released from the fixed-side die plate 3, so that the fixed-side mold 2 is held by the moving-side die plate 4 in a state of being assembled with the moving-side mold 1 in one set.

By transferring and mounting the molded product chuck plate 6 of the unloader 5 which has been used until then to the mold, the mold and the molded product chuck plate 6 specific (exclusive) thereto are integrated into one set.

Thus, by exchanging the set of molds and the molded product chuck plate 6 with the new molds 1 ', 2'on the mold standby device 7 and the molded product chuck plate 6',
The unique relationship between the mold and the molded product chuck plate is maintained consistently from the time of storage to the time of use.

A new molded product chuck plate 6'is received by the take-out machine 5 and the fixed-side die plate 3 receives the fixed-side mold 2 ', whereby all the replacement work is completed.

By performing all the steps of the above-mentioned exchange method as sequence control or automatic control using a microcomputer, mechanization that does not require any human hands and fully automated speed,
Can perform accurate mold replacement work.

Example Next, an example of the present invention will be described.

First, FIG. 1 shows a state in which the movable mold 1 is opened from the fixed mold 2 by a predetermined stroke, and the molded product 10 is taken out upward by the take-out machine 5. The moving die 1 is attached to the moving die plate 4 by an automatic clamp device 11. The movable die plate 4 is installed upright on the swivel base 12, and is a mold opening / closing mechanism including a ball screw shaft 13 and an opening / closing motor 14 that rotationally drives the ball screw shaft 13. It is configured to move in a stroke. The swivel base 12 includes the pinion 15a of the swivel motor 15 and the base 1
At least 180 ° due to the meshing movement of the 6 large gear 16a
As described above, it is preferably configured to rotate 360 °.

The stationary die 2 is attached to the stationary die plate 3 by an automatic clamp device 17. The movable die plate 3 is set upright on the left end portion of the injection device base 18 in the figure and firmly fixed. The tie bar 19 which is cantilevered on the fixed side die plate 3 and arranged leftward in the drawing in parallel with the die opening / closing direction enters the through hole 20 of the moving side die plate 4 which is moved rightward by the die opening / closing mechanism. . Moving side mold 1
The tie bar 19 penetrates the through hole 20 before and after the contact with the fixed side mold (mold closing). The tie bar locking device 21 installed on the left end surface of the movable die plate 4 firmly locks (chucks) the left end portion of the tie bar 19 that has passed through the through hole 20. At the right end of the tie bar 19, a piston 22a of a mold clamping cylinder mechanism 22 attached to the fixed die plate 3 is provided, and the hydraulic control of the piston 22a enables strong clamping of the movable mold 1 and the stationary mold 2. Done. An injection device 23 is attached to the fixed die plate 3.

A traverse bed 24 of the unloader 5 and a traverse stand 25 that moves on the traverse bed 24 are installed on the same fixed die plate 3. A vertical arm 27 that is vertically cantilevered in the drawing is attached to the tip of a support arm 26 that is cantilevered on the transverse table 25 and that is horizontally moved in the drawing. The molded product chuck plate 6 is supported (chucked) by a locking device 28 installed at the rod tip of the vertical arm 27. However, there is an example in which the unloader 5 is installed and implemented with a configuration completely independent of the structure of the injection molding machine.

The mold waiting device 7 is adjacent to the left side of the swivel base 12 in the figure.
, And a set of new molds 1 ', 2'and a molded product chuck plate 6'waiting for one or more replacements is prepared.

Therefore, when it becomes necessary to replace the mold, first the mold opening / closing mechanism is driven to move the moving mold 1 together with the moving die plate 4 to the right in the figure, and the fixed mold 2 is closed. Let At this time, the locking device 21 does not lock the tie bar 19. The movable side mold 1 and the fixed side mold 2 that have been mold closed are held in a joined state (mold closed state) by the guide pin 29 protruding from the movable side mold 1, and both molds 1, 2
They are exactly one set. Therefore, when the fixed side mold 2 is released from the fixed side die plate 3 by operating the automatic clamp device 17, both the molds 1 and 2 are supported by the moving side die plate 4 in the one set state. Become. The piston 22a of the mold clamping cylinder mechanism 22 and the tie bar 19 which is integral with the piston 22a of the mold clamping cylinder mechanism 22 are moved to the right by the maximum stroke L at the same time as or before and after the operation of releasing the fixed side mold 2 by the automatic clamp device 17, Tie bar
19 is retracted to a position where there is no risk of contact or the like when the movable die plate 4 and / or the dies 1 and 2 are rotated.

After that, the moving side die plate 4 is attached to the tie bar 1 as shown in FIG. 2 and FIG.
It is retracted to the left in the figure by the mold opening / closing mechanism to a position where it can turn without being disturbed by 9. At this point, the molded product chuck plate 6 that has been mounted on the take-out machine 5 is moved toward the back surface of the fixed-side mold 2 in the illustrated example of the mold by the operation of the take-out machine 5 to set a predetermined value. The locking device (locking tool) prepared in advance is passed and mounted in a predetermined manner, so that the molds 1 and 2 and the molded product chuck plate 6 are made into one set (FIG. 2). ). However, the time when the molded product chuck plate 6 is attached to the moving-side mold 1 and made into one set can be set even at the beginning of the replacement work, for example. FIG. 2 and FIG. 3 show a state in which the above-mentioned three parties have been completed as one set and the unloader 5 has been retracted to a position where it does not interfere with the turning of the moving die plate 4 and the like.

After that, the moving side die plate 4 is rotated leftward in the figure by rotating the swivel base 12 by 180 with the swivel motor 15 together with one set of the molds 1 and 2 and the molded product chuck plate 6 held by the movable die plate 4. It faces the mold waiting device 7 located at. Subsequently, the moving side die plate 4 is moved to the left in the figure by the die opening / closing mechanism, and as shown in FIG. 4, one set of the die 1, 2 and the molded product chuck plate 6 can be exchanged. .

As a procedure for die replacement, first, the automatic clamping device 11 is operated to release the die 1 on the moving side from the die plate 4 on the moving side. As a result, one set of the molds 1 and 2 and the molded product chuck plate 6 is delivered to the mold standby device 7 (is placed on the mold standby device 7). The used molds 1 and 2 and the molded product chuck plate 6 received by the mold standby device 7 are retracted to a position that does not interfere with the mold replacement work as indicated by the dotted arrow 30 shown in FIG. . Next is the same mold waiting device 7
The one set of the new dies 1 ', 2'and the molded product chuck plate 6'waiting on the above is moved as shown by an arrow 31 in FIG. 4, and the moving side die plate 4 can receive it. Place in position. With the automatic clamp device 11 released, the moving die plate 4 is moved closer to the standby die by the die opening / closing mechanism. Then, the movable die 1 is held and received by the chucking operation of the automatic clamp device 11 in the released state, and the die exchange work is completed.

Thus, the procedure after the moving side die plate 4 receives the new set of molds 1 ', 2'and the molded product chuck plate 6', the procedure and process of the first half are reversed. . That is, the movable die plate 4 is slightly retracted to the right in the drawing to a position where it can be turned. Continue turning motor 15
The movable die plate 4 is swung together with the swivel base 12 by the operation of, and is again oriented parallel to the fixed die plate 3 in parallel. In short, the situation returns to the same state as shown in FIGS. 2 and 3. At this point, the unloader 5 is operated and moved to a position where it can receive a new molded product chuck plate 6 ', and its locking device 28 receives the molded product chuck plate 6'and mounts it in a proper usage mode (chucking). ) Will be done. In this way, after the take-out machine 5 with the new molded product chuck plate 6'removed to a position where it does not interfere with the die replacement, the moving side die plate 4 and the die 1'and 2'held on the moving side die plate 4 It is moved toward the fixed side die plate 3 on the right side in the figure by the mold opening / closing mechanism. Then, the fixed side mold 2'is brought close to a position where the fixed side die plate 3 can be received, and the automatic clamping device 17 holds and receives it. With this, all the steps of the mold replacement have been completed, and it is possible to immediately move to the molding step.

Advantageous Effects of the Present Invention As described above in detail with reference to the embodiments, the method of exchanging a mold and a molded product chuck plate according to the present invention is a mold 1,2
Also, since a unique combination of the molded product chuck plate 6 is replaced as one set, the time and labor required for the replacement work can be considerably saved as compared with the case where the both are individually replaced.
The operating efficiency of the injection molding machine is improved by that amount.

Further, since the unique combination of the molds 1 and 2 and the molded product chuck plate 6 can be managed in the same manner and can be stored in one storage place, labor and space can be saved. Not only mold 1,
This is convenient because there is no risk of mistaking the combination of 2 and the molded product chuck plate 6 peculiar thereto.

Further, the automatic changer conventionally required for automatically changing the molded product chuck plate 6 is not necessary, and the occupied space for installing the machine and the equipment cost of the machine are not necessary, which is economical. Since the molds 1 and 2 and the molded product chuck plate 6 can be mechanically and automatically replaced by one set, it is advantageous in shortening the time required for mold replacement and unmanned can be achieved.
The safety of work and the reduction of labor costs are achieved.

[Brief description of drawings]

FIG. 1 is a front view showing a mold open state of an injection molding machine in which the method of the present invention is carried out, and FIGS. 2 and 3 are moving side die plates in which a mold and a molded product chuck plate are made into one set. FIG. 4 is a plan view showing a state in which the mold is held on the mold standby device, and FIG. 1 ... moving-side mold, 2 ... fixed-side mold 3 ... fixed-side die plate 4 ... moving-side die plate, 5 ... unloader 6 ... molded product chuck plate, 7 ... mold standby device

Claims (1)

[Claims] 1. A) The moving side mold is closed to the fixed side mold, the fixed side mold is released from the fixed side die plate, and both molds are integrated into one set and held on the moving side die plate. B) Retracting the moving die plate to a position where it can swivel, passing the molded product chuck plate of the unloader to the mold and mounting it, and c) the moving die plate is made of metal. Mold and molded product A new mold and molded product prepared on the mold standby device by swiveling together with a set of chuck plates, releasing the movable mold from the movable die plate and passing it to the mold standby device. The stage of exchanging with a set of chuck plates, d) The moving die plate that received a new set of mold and molded product chuck plate is swiveled again to face the fixed die plate and mounted on the die. Molded product The receiving plate is received by the unloader and mounted, and (e) the moving-side die plate is moved toward the fixed-side die plate, and the fixed-side die is passed to and held by the fixed-side die plate. A method of exchanging a mold and a chuck plate of a molded product, characterized by