JPH0939110A - Production apparatus of resin container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mold containers immediately without problems from parisons molded continuously. SOLUTION: A tray accumulator 17 for retaining a parison tray 3 loaded with a parison is installed between an injection molding machine 11 and a blow molding machine 21, and various sensors 31a, 31b for detecting troubles such as the tumble and capture of a container and others are installed near a container conveyer 23 or in a packing machine 24 and a capping machine 25 and in other places. A controllers 30 is installed which stops the blow molding machine 21, the packing machine 24, the capping machine 25, etc., on the basis of signals from the sensors 31a, 31b etc., retains the parison tray 3 in the parison accumulator 17 to continue the molding of the parison.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin container manufacturing facility, and is particularly effective when the manufactured container is continuously filled with a liquid such as a beverage.

[0002]

2. Description of the Related Art FIG. 4 shows conventional equipment for manufacturing a resin container and filling it with a liquid. As shown in FIG.
A raw resin pellet or the like is put into an injection molding machine 51, and a parison (a bottomed container having a test tube also called a preform) 1 as shown in FIG. 5 is molded by the injection molding machine 51, and the parison 1 is injection molded. It is taken out of the machine 51 by the take-out machine 52 and put in the storage box 41 by the shooter 53. Storage box 4
When the parison 1 in 1 reaches the specified amount, the storage box 41 concerned
Is exchanged with a new empty storage box, and the storage box 41 is transported to the storage location and piled up.
Is prepared in advance. The parison 1 is naturally cooled at this time.

Next, the storage box 41 is moved from the storage location to the transport vehicle 4
2 is conveyed, and the parison 1 is put in the unscrambler 54. The parison 1 is arranged in a single row by the unscrambler 54 and sent out to the parison conveyor 55, and is sent into the heater 56a of the blow molding machine 56 by the parison conveyor 55 and heated, and then the blow molding machine 56 6
It is molded into a container 2 as shown in FIG.

The formed container 2 is sent by a container conveyor 57, and is delivered to a rotary type filling machine 58 while the delivery timing is adjusted by a star wheel device or the like, and after being filled with a liquid by the filling machine 58. Then, it is sent to the rotary type capping machine 60 via the container conveyor 59, capped and sealed by the capping machine 60, and sent to the packaging process by the discharge conveyor 61.

Since it is necessary to clean the container 2 when it is filled with a liquid for beverages, a cleaning device is provided on the line of the parison conveyor 55, the container conveyor 57, etc. When filling a liquid beverage that cannot be heat-treated, such as a carbonated gas-containing beverage, it is necessary to sterilize the container 2. Therefore, a sterilizer is provided on a line such as the parison conveyor 55 or the container conveyor 57. ing.

In such a facility, since the parison 1 is prepared in advance, the production plan can be simplified and the parison 1 can be outsourced. However, it is troublesome to secure a storage place for the parison 1 and to carry it. Not only does this cause problems with the above, but also the parison 1 is deformed and damaged during storage and storage, and dust enters the parison 1.

Therefore, there has been considered a facility in which the parison molded by the injection molding machine is arranged in a single row on the spot and fed to the blow molding machine to immediately mold the container. In addition,
In such equipment, the parison is cooled during the feeding of the parison from the injection molding machine to the blow molding machine.

[0008]

However, in various devices used in the filling process such as the container conveyors 57 and 59, the filling machine 58, and the capping machine 60 described above, there are problems such as container collapse and container jamming. Since it is necessary to stop and correct the entire line each time, it is necessary to install equipment for immediately producing containers from the parison as described above. It will have to be stopped during the molding process.

If the injection molding machine is stopped during molding of the parison, the molten resin stays inside the injection molding machine and is thermally deteriorated. Therefore, when the parison is restarted, it stays inside the injection molding machine. The resin must be purged by air shot. For this reason, since the injection molding machine has to be modified more complicatedly than the filling process, not only the manufacturing efficiency is significantly lowered, but also a large amount of material is wasted. For this reason, a continuous line facility in which a continuously molded parison is immediately molded into a container and filled with a liquid has not been implemented.

[0010]

[MEANS FOR SOLVING THE PROBLEMS] To solve the above-mentioned problems, a resin container manufacturing facility according to the present invention comprises an injection molding machine for continuously molding a parison from a raw resin, and an injection molding machine for molding the parison. A manufacturing facility for a resin container comprising a blow molding machine for continuously molding a container from the parison, wherein the parison from the injection molding machine is retained along with the stop of the blow molding machine. A parison feeding control means is provided for sequentially feeding the retained parison to the blow molding machine as the blow molding machine operates.

In the resin container manufacturing facility according to the present invention, the molding cycle time of the parison of the injection molding machine is extended with the stop of the blow molding machine, and the parison feeding control means stays. A parison molding control means is provided for controlling the injection molding machine so as to return the molding cycle time of the parison of the injection molding machine to the initial length upon completion of feeding the parison.

In the facility for manufacturing a resin container according to the present invention, the parison molding control means adjusts the molding cycle time of the parison by the time taken to take out the parison from the mold of the injection molding machine. It is characterized by controlling the machine.

The resin container manufacturing facility according to the present invention is characterized in that the parison and the container are handled in a clean environment so that the molded container is clean.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a resin container manufacturing facility according to the present invention will be described with reference to FIGS. 1 is a schematic configuration diagram thereof, FIG. 2 is an extracted enlarged perspective view of an arrow II portion of FIG. 1, and FIG. 3 is an extracted enlarged perspective view of an arrow III portion of FIG.

As shown in FIG. 1, two injection molding machines 11 are provided.
Is provided with a parison take-out machine 12 that alternately takes out the parison 1 molded by these injection molding machines 11 and places the parison 1 at a predetermined position on the parison tray 3 so as to bridge the injection molding machines 11. . The parison take-out machine 12 has a tray conveyor 1 for carrying the parison tray 3 on which a predetermined amount of the parison 1 is placed by the parison take-out machine 12.
The upstream part of 3 is in contact. This tray conveyor 13
As shown in FIG. 2, the parison tray 3 is inclined so as to be lowered from the upstream side to the downstream side so that the parison tray 3 can be conveyed by its own weight, and the flow unevenness in the front and rear steps is uneven. Can be corrected. As shown in FIG. 1, the tray conveyor 13 is covered with a cooling hood 14 around the downstream side thereof, and the parison tray 3
The parison 1 placed on is cooled by the cooling hood 14 while being conveyed by the tray conveyor 13.

As shown in FIG. 1, a stopper 15 for stopping the conveyed parison tray 3 is provided downstream of the tray conveyor 13. Tray conveyor 1
A tray lifter 16 for alternately receiving the parison tray 3 stopped by the stopper 15 is provided on both sides of the downstream portion of the tray 3.
Are provided so as to sandwich the tray conveyor 13 to form a pair. Each of these tray lifters 16 is provided with a tray accumulator 17 that stores the parison tray 3 received by the tray lifter 16. Each of these tray accumulators 17 is provided with a tray lifter 18 that takes out the parison tray 3 from the tray accumulator 17. These tray lifters 1
Between 8 and 8, the parison aligner 1 for taking out the parison 1 on the parison tray 3 taken out by the tray lifter 18 concerned.
9 are provided.

As shown in FIG. 1, the parison aligner 19 is connected to the upstream part of a parison conveyor 20 for sequentially sending out the parison 1 taken out by the parison aligner 19. As shown in FIG. 3, the parison conveyor 20 sends out the parison 1 by the air from the air nozzle 20a, so that the flow unevenness in the preceding and following steps can be corrected. Further, the parison tray 3 which has been emptied by removing the parison 1 by the parison aligning machine 19 is placed on the tray lifter 18 by the parison ejecting machine 1.
There is a return conveyor (not shown) that sends back to 2.

As shown in FIG. 1, the downstream portion of the parison conveyor 20 is connected to a heating device 21a of a rotary blow molding machine 21. The blow molding machine 21 is connected to an upstream portion of a container conveyor 22 that conveys the container 2 molded by the blow molding machine 21, and the container conveyor 22 has the same structure as the parison conveyor 20. There is. The downstream portion of the container conveyor 22 is connected to the upstream portion of the table-top container conveyor 23. In the middle of the container conveyor 23, a rotary-type filling machine 24 for sequentially filling the container 2 with liquid via a container indexing / delivery mechanism (not shown) such as a star wheel device is arranged. At the downstream portion of the container conveyor 23, a rotary capping machine 25 that sequentially caps and seals the liquid-filled container 2 is arranged. The capping machine 25 is connected to a discharge conveyor 26 that sequentially sends the capped containers 2.

Further, as shown in FIG. 1, the container conveyor 2
3, the sensors 31a and 31b for detecting the overturning of the container and the like are provided in the upstream portions of the filling machine 24 and the capping machine 25, respectively. Internal sensors (not shown) for detecting the above are respectively provided. Each of the tray accumulators 17 is provided with a parison detection sensor (not shown) for detecting the number of the stored parison 1. The sensors 31a and 31b, the internal sensor, and the parison detection sensor are electrically connected to input parts of the control device 30 (not shown), and the injection molding machine 11, the parison take-out machine 12, the tray lifter 18, and the parison aligning machine 19 are connected. , Parison conveyor 20, blow molding machine 2
1, the container conveyors 22 and 23, the filling machine 24, the capping machine 25, etc. are electrically connected to the output section of the control device 30 (not shown).

The control device 30 has the sensor 31.
The tray lifter 18, the parison aligning machine 19, the parison conveyor 20, the blow molding machine 21, the container conveyors 22 and 23, and the filling machine 24 based on the detection signals of the container 2 falling or biting from the internal sensors a and 31b. , The capping machine 25 and the like are temporarily stopped, and the injection molding machine 11 and the parison take-out machine 12 are controlled so as to extend the time taken to take out the parison 1 from the mold of the injection molding machine 11. The parison 1 in the tray accumulator 17 is sequentially sent out in accordance with the release of the stop, that is, the restart, and the mold of the injection molding machine 11 is based on the detection signal of the feeding end of the parison 1 from the parison detection sensor. The injection molding machine 11 so that the time taken to remove the parison 1 from the
Also, the parison unloader 12 is controlled.

Further, as shown in FIG. 1, the tray lifter 16, the tray accumulator 17, and the tray lifter 1 are provided.
8, the parison aligning machine 19, the parison conveyor 20, the blow molding machine 21, etc. are arranged inside the clean room 27, and the container conveyor 23, the filling machine 24, the capping machine 25, etc. are arranged inside the clean room 28. The clean rooms 27 and 28 are connected by the container conveyor 22. The inside of these clean rooms 27, 28 is set so that clean air is blown in and the atmospheric pressure is slightly higher than the outside, and
Each is individually air-conditioned. On the other hand, upstream parts of the parison unloader 12 and the tray conveyor 13 are covered with a hood 29 that communicates with the cooling hood 14. These hoods 14, 29
The inside is set so that the air having a higher cleanliness than the clean rooms 27 and 28 is blown through the air filter so that the atmospheric pressure is slightly higher than the clean rooms 27 and 28. It can be maintained in the environment.

That is, the parison 1 and the container 2 are handled in a clean environment so that the molded container 2 becomes clean.

In this embodiment, the tray lifter 16,
The tray accumulator 17, the tray lifter 18, the parison aligner 19, the control device 30 and the like constitute a parison feeding control means, and the parison detection sensor, the control device 30 and the like constitute a parison molding control means.

Such equipment operates as follows.
When the raw resin pellets and the like are put into the injection molding machine 11,
The injection molding machine 11 continuously molds the parison 1 at predetermined cycle intervals. The formed parison 1 is sequentially arranged on the parison tray 3 by the parison take-out machine 12. Parison tray 3 filled with parison 1 is tray conveyor 1
The parison 1 is sequentially sent out at 3 and passed through the cooling hood 14 to cool the parison 1, and then stopped at the stopper 15. The parison tray 3 stopped by the stopper 15 is moved to the tray lifter 16, passes through the tray accumulator 17, and then is moved to the tray lifter 18. The parison 1 on the parison tray 3 transferred to the tray lifter 18
The parison aligning machine 19 sequentially arranges the parison conveyors 20, and the parison conveyor 20 sends the blower molding machines 21 to the blow molding machine 21 to heat them by the heating device 21a, and then molds them into the container 2.

The container 2 molded by the blow molding machine 21 is
After the liquid is filled in the filling machine 24 via the container conveyors 22 and 23, it is capped in the capping machine 25 and sent to the packaging process in the discharge conveyor 26.

In this way, after forming the parison 1 from the raw material resin and immediately forming the container 2, when the liquid is filled and capped, the container conveyors 22 and 2 described above are used.
3, filling machine 24, capping 25, discharge conveyor 2
When a trouble such as container collapse or container jamming occurs in the filling process such as 6, the sensors 31a, 31
The control device 30 controls the tray lifter 18, the parison aligner 19, the parison conveyor 20, the blow molding machine 21, the container conveyors 22, 2 based on the signals from b and the internal sensor.
3, the filling machine 24, the capping machine 25, etc. are temporarily stopped, and the injection molding machine 11 is designed to extend the time taken to take out the parison 1 from the mold of the injection molding machine 11.
And control the parison unloader 12.

The control device 30 has various devices 1 as described above.
Once 8 to 25 etc. are stopped, the defect is corrected during the stop. During the correction of this defect, the injection molding machine 11
Continues molding the parison 1 with a molding cycle time longer than the initial time. Parison 1 molded while fixing the above defects
In the same manner as described above, the parison take-out machines 12 sequentially arrange the parison trays 3, and the tray lifter 16 through the tray conveyor 13 stores or retains them in the tray accumulator 17 one after another.

After the above problem is corrected and the stop is released, that is, re-started, the controller 30 stores the parison 1 on the parison tray 3 stored in the tray accumulator 17, that is, retained in the same manner as described above. Blow molding machine 2
Send to 1 sequentially. At this time, the blow molding machine 21 of the parison 1 retained in the tray accumulator 17
Since the molding cycle time of the parison 1 molded by the injection molding machine 11 is longer than the feeding cycle time of the parison 1, the number of the parison 1 retained in the tray accumulator 17 gradually decreases.

When the quantity of the parison 1 retained in the tray accumulator 17 decreases and the feeding of the parison 1 in the tray accumulator 17 is completed, the control device 30 causes the injection molding based on the signal from the parison detection sensor. The injection molding machine 11 and the parison take-out machine 12 are controlled so that the time taken to take out the parison 1 from the mold of the machine 11 is returned to the initial length.

That is, for example, the production capacity of the parison 1 by the injection molding machine 11 is 200 pieces / minute (two), the number of the parison 1 held by the parison tray 3 is 48 pieces / piece, and the parison tray by the tray accumulator 17 is set. Three
If the permissible holding number of 21 is set to 21, even if the various devices 18 to 25 on the downstream side of the tray accumulator 17 are stopped,
The molding of the parison 1 by the injection molding machine 11 can be continued for about 5 minutes with the above-mentioned production capacity, and sufficient time can be obtained for correcting the above-mentioned defects. Further, the parison by the injection molding machine 11 can be obtained. If the molding cycle time of 1 is extended from 30 seconds to 35 seconds, the production capacity of parison 1 will be 171
Since the number of bottles per minute (two units) is 200, the blow molding machine 21, the filling machine 24, and the capping machine 25 can mold, fill, and cap the container 2, and the parison retained in the tray accumulator 17 can be used. It is possible to return the injection molding machine 11 to the initial production capacity by sending out all of 1 in about 35 minutes.

Therefore, even if a problem occurs in the filling process or the like, the problem can be corrected without stopping the injection molding machine 11, so that the molten resin stays inside the injection molding machine 11. Therefore, it is not necessary to correct the injection molding machine 11 at the time of re-operation, and waste of materials can be eliminated. Therefore, since the parison 1 can be molded from the raw material resin and the container 2 can be immediately molded, it is possible to significantly reduce the time and labor required to secure a storage place for the parison 1 and to transport the parison 1, and to deform and damage the parison 1. It is possible to prevent dust and the like from entering the parison 1.

Further, since the process line from the take-out portion of the parison 1 of the injection molding machine 11 to the capping machine 25 is covered with the cooling hood 14, the clean rooms 27, 28, the hood 29, etc., from the molding of the parison 1 to the container. The capping of 2 can be performed in a clean environment, and the cleanliness of the cooling hood 14 and the hood 29 is made higher than that of the clean rooms 27, 28, so that the cleanliness of the parison 1 is significantly increased. It is not necessary to provide a sterilizer even when filling a cooled liquid such as a gas-containing beverage.

Since the blow molding machine 21 having heat is arranged in the clean room 27 and the filling machine 24 is arranged in the clean room 28, the blow molding machine is filled even when it is filled with a cooled liquid such as a carbonated gas-containing beverage. 21
The side and the filling machine 24 side can be air-conditioned separately, and the waste of energy required for air-conditioning can be reduced.

[0034]

EFFECT OF THE INVENTION In the resin container manufacturing facility according to the present invention, while the parison continuously molded by the injection molding machine is immediately and continuously molded by the blow molding machine, when the blow molding machine is stopped. While the parison feed control means retains the parison from the injection molding machine, the parison feed control means sequentially feeds the retained parison to the blow molding machine when the blow molding machine operates. Therefore, even if the blow molding machine stops, molding of the parison by the injection molding machine can be continued. For this reason, since the container can be immediately molded from the parison without any problem, it is possible to significantly reduce the labor required to secure a storage place for the parison and to transport the parison, and to deform the parison.
It is possible to prevent damage and dust ingress into the parison.

Further, as the blow molding machine is stopped, the parison molding control means extends the parison molding cycle time of the injection molding machine, while the parison accumulated in the parison feed control means is completely fed. Since the parison molding control means restores the parison molding cycle time of the injection molding machine to the initial length, it is of course possible to extend the permissible time of the parison to be retained by the parison feed control means, as well as the parison feed control means. It is possible to send out all of the parison retained in step 1 within a predetermined time, and restore the parison molding pace similar to that at the beginning.

Further, since the molding cycle time is adjusted by the time taken to take out the parison from the mold of the injection molding machine, the molding conditions such as injection holding pressure condition and cooling condition of the parison are not changed. That is, the molding cycle time can be controlled without changing the physical properties of the parison to be molded. Therefore, even if the molding cycle time is changed, a parison of constant quality can always be molded.

Further, since the parison and the container are handled in a clean environment so that the molded container is clean, sterilization is performed even when filled with a cooled liquid such as a carbonated gas-containing beverage. It is not necessary to provide a means for performing processing.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a resin container manufacturing facility according to the present invention.

FIG. 2 is an extracted enlarged perspective view of an arrow II portion of FIG.

3 is an extracted enlarged perspective view of an arrow III portion of FIG.

FIG. 4 is a schematic configuration diagram of an example of conventional manufacturing equipment for a resin container.

FIG. 5 is an external view of a parison.

FIG. 6 is an external view of a container.

[Explanation of reference symbols] 1 parison 2 container 3 parison tray 11 injection molding machine 16 tray lifter 17 tray accumulator 18 tray lifter 19 parison aligner 21 blow molding machine 30 control device 31a, 31b sensor

Claims (4)

[Claims] 1. A facility for manufacturing a resin container, comprising an injection molding machine for continuously molding a parison from a raw material resin, and a blow molding machine for continuously molding a container from the parison from the injection molding machine. The parison from the injection molding machine is retained while the blow molding machine is stopped, and the retained parison is sequentially sent to the blow molding machine with the operation of the blow molding machine. A facility for manufacturing a resin container, which is provided with a parison feeding control means for feeding. 2. Along with the stop of the blow molding machine, the molding cycle time of the parison of the injection molding machine is extended, while the feeding of the parison accumulated in the parison feeding control means is completed, 2. The resin container manufacturing method according to claim 1, further comprising a parison molding control means for controlling the injection molding machine so that the molding cycle time of the parison of the injection molding machine is returned to the initial length. Facility. 3. The injection molding machine is controlled by the parison molding control means so as to adjust a molding cycle time of the parison according to a take-out time of the parison from a mold of the injection molding machine. Item 2. A facility for manufacturing a resin container according to item 2. 4. The resin container manufacturing facility according to claim 1, wherein the parison and the container are handled in a clean environment so that the molded container is clean.