JP2003080531A - Cooling apparatus for synthetic resin molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for efficiently correcting and cooling a synthetic resin molded article even if a straightening and cooling time is required long as compared with the molding time in a molding machine. SOLUTION: In the cooling apparatus for the synthetic resin molded article 1 constituted so that the synthetic resin molded article 1 is molded by the molding machine and subsequently taken out of the molding machine to be cooled while straightened using a correcting and cooling fixture 5, the cooling apparatus has a feed device 7 on which a plurality of the straightening and cooling fixtures 5 can be mounted and the feed device 7 is equipped with a feed bar 17 for moving the straightening and cooling fixtures 5 to the next position on the feed device 7 and a positioning bar 18 for positioning the straightening and cooling fixtures 5 at respective positions on the feed device 7. During the movement of the straightening and cooling fixtures 5 on the feed device 7, the synthetic resin molded article 1 in the straightening and cooling fixtures 5 is straightening and cooled.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an apparatus for efficiently cooling a synthetic resin molded article such as a synthetic resin fuel tank.

[0002]

2. Description of the Related Art For example, although fuel tanks for automobiles are often made of synthetic resin, this synthetic resin molded product is generally manufactured by blow molding.
Blow-molded products have high heat immediately after die cutting, so when performing secondary processing such as hole processing and welding of other members, cool the primary molded product immediately after die cutting to a temperature at which this secondary processing can be performed. There is a need. For this cooling, conventionally, a method of taking out a synthetic resin molded product in a blow molding machine after hot molding, radiating heat naturally on a transfer conveyor or a storage place, or immersing it in a water tank for a certain period of time has been adopted. Was there.

However, if a synthetic resin molded product is taken out in a blow molding machine while it is still hot, the molded product will be deformed by its own weight. Therefore, the above-mentioned conventional method is not good in processing precision of the molded product. Therefore, JP-A-11-12
In the method disclosed in Japanese Patent No. 9288, after molding a synthetic resin molded product by a molding machine, the synthetic resin molded product is cooled while being straightened by a straightening jig.

[0004]

However, this Japanese Unexamined Patent Application Publication No.
No. 1,129,288 discloses or suggests transporting the straightening cooling jig or replacing the straightening cooling jig. Therefore, the above publication has a problem that it cannot flexibly cope with the change of the kind of the synthetic resin molded product.

A first object of the present invention is to provide a system for efficiently straightening and cooling a synthetic resin molded product even when the straightening cooling time is longer than the molding time in a molding machine. A second object of the present invention is to provide a system capable of flexibly responding to changes in the types of synthetic resin molded products.

[0006]

In order to achieve the above-mentioned object, in the invention according to claim 1, after molding a synthetic resin molded article by a molding machine, the synthetic resin molded article taken out from the molding machine is straightened and cooled. In a cooling device for a synthetic resin molded product that is cooled while straightening by using a jig, the cooling device has a carrying device on which a plurality of straightening cooling jigs can be placed. The device is equipped with a carrying bar for moving the straightening cooling jig to the next positioning position on the carrying device and a positioning bar for positioning the straightening cooling jig at each positioning position on the carrying device. The synthetic resin molded product in the straightening cooling jig is straightened and cooled while moving on the transport device. With this configuration, even when the straightening cooling time is longer than the molding time in the molding machine, the synthetic resin molding is performed while the straightening cooling jig storing the synthetic resin molded product moves on the transport device. The item will be straightened and cooled. For example, when the molding time in the molding machine is 1 minute and the straightening cooling time is 10 minutes, the straightening cooling is completed every 1 minute from the transporting device by providing 10 straightening cooling jigs on the transporting device. The synthetic resin molded product is carried out.

In the invention according to claim 2, in the invention according to claim 1, the straightening cooling jig has a lower receiving member and an upper receiving member corresponding to the shape of the synthetic resin molded product. By having such a configuration, by preparing a plurality of orthodontic cooling jigs having a lower receiving member and an upper receiving member corresponding to the shape of the synthetic resin molded product corresponding to the type of the synthetic resin molded product, The change of the kind of the synthetic resin molded product can be easily dealt with by replacing the straightening cooling jig on the carrying device.

According to a third aspect of the invention, in the invention according to the first or second aspect, the carrying bar has means for supplying compressed air for cooling the synthetic resin molded product to the straightening cooling jig. did. With such a configuration, the straightening cooling jig, when it is in the state of moving between the positioning positions on the transport device by the operation of the transport bar,
Since the compressed compressed air for cooling is supplied from the means for supplying compressed compressed air that the carrying bar has, when the straightening cooling jig is moving between the positioning positions on the carrying device. Also, the straightening cooling of the synthetic resin molded product will be performed.

In the invention according to claim 4, claims 1 to 3
In any one of the inventions described above, the positioning bar has means for supplying compressed air for cooling the synthetic resin molded product to the straightening cooling jig. With such a configuration, the straightening cooling jig cools from the means for supplying the compressed compressed air included in the positioning bar when the positioning cooling bar is positioned at the positioning position on the transport device by the operation of the positioning bar. Since the compressed air for use is supplied, the straightening cooling of the synthetic resin molded product is performed even when the straightening cooling jig is positioned at the positioning position on the transport device.

In the invention according to claim 5, claims 1 to 4 are provided.
In the invention according to any one of the above, the correction cooling jig is provided with means for stopping the supply of the compressed compressed air. With this configuration, for cooling the synthetic resin molded product from the straightening cooling jig before inserting the next synthetic resin molded product, or when the supply of the synthetic resin molded product from the molding machine is interrupted. This can be stopped when the discharge of compressed air is unnecessary.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing the overall configuration of a cooling device for synthetic resin molded products according to an embodiment of the present invention. FIG. 2 is a plan view showing the configuration of the straightening cooling jig 5 included in the cooling device shown in FIG. Figure 3
[Fig. 3] is a side view of the straightening cooling jig 5 shown in Fig. 2. Figure 4
FIG. 4 is a configuration diagram showing a structure for supplying compressed air for cooling from the transport bar 17 to the straightening cooling jig 5. Figure 5
FIG. 6 is a configuration diagram showing a structure of a hand valve 22 installed in the correction cooling jig 5.

In this embodiment, after molding the synthetic resin molded product 1 by a blow molding machine (not shown), the synthetic resin molded product 1 taken out from the blow molding machine can be placed on a plurality of straightening cooling jigs 5. In addition, a transport bar 7 for transporting the straightening cooling jig 5 to the next positioning position and a transporting device 7 having a positioning bar 18 for positioning the straightening cooling jig 5 at each positioning position are used to make a synthetic resin. Molded product 1
Is circulated to each positioning position on the transport device 7 and is straightened and cooled.

In the overall structure of the cooling device shown in FIG. 1, the blow-molded synthetic resin fuel tank 1 is taken out from a blow molding machine (not shown) and then the operation of the vertical articulated robot 3 is carried by the carry-in conveyor 2. It is transported into the area 3a and positioned at the grip position of the vertical articulated robot 3 at the end of the carry-in conveyor 2 (the left end of the carry-in conveyor 2 shown in FIG. 1). Then, the fuel tank 1 positioned at this gripping position is gripped by the vertical articulated robot 3. At this time, one of the plurality of straightening cooling jigs 5 existing on the transfer device 7 is at the positioning position 7 a on the transfer device 7. The lid opening / closing air cylinder 4 opens the lid 9 shown in FIG. 3 which is provided in the correction cooling jig 5 at the positioning position 7a. After that, the vertical articulated robot 3 holding the fuel tank 1 turns and the vertical articulated robot 3
Place the held fuel tank 1 in the correction cooling jig 5 in the positioning position 7a and the lid 9 is opened,
After that, shelter.

Next, after the lid 9 is closed by the lid opening / closing air cylinder 4 and the lid clamp 10 shown in FIG. 3 is closed by the clamping air cylinder 6, the lid 9 is located at the positioning position 7a by the carrying function of the carrying device 7. Straightening cooling jig 5
Is sent to the next positioning position 7b on the transport device 7 in the direction of the arrow on the transport device 7 shown in FIG. From this point, the compressed compressed air is discharged from the nozzle 11 shown in FIG. 3, and the compressed compressed air cools the fuel tank 1. During this cooling process, the shape of the fuel tank 1 is corrected by being sandwiched between the lower receiving member 12 and the upper pressing member 13 shown in FIG. Since the arrangement and shape of the lower receiving member 12 and the upper pressing member 13 are provided so as to correspond to the shape of the fuel tank 1, if the type of the fuel tank 1 is different, each of them will correspond to this type. Lower receiving member 12 in straightening cooling jig 5
The arrangement and shape of the upper pressing member 13 are also different.

The straightening / cooling jig 5 is sequentially transported to the next positioning position from the positioning position 7a to the positioning position 7b and from the positioning position 7b to the positioning position 7c by the transportation function of the transportation device 7 which will be described later. One cycle is made, and during that time, it is straightened and cooled, and finally returns to the positioning position 7a where the lid opening / closing air cylinder 4 and the clamping air cylinder 6 are installed. In the correction cooling jig 5 which has returned to the positioning position 7a, the lid clamp 10 is opened by the clamping air cylinder 6 and then the lid 9 is opened by the lid opening / closing air cylinder 4. Then, the vertical articulated robot 3 holds the straightened and cooled fuel tank 1 and transfers it onto the carry-out conveyor 8. The fuel tank 1 transferred onto the carry-out conveyor 8 moves on the carry-out conveyor 8 in the direction of the arrow on the carry-out conveyor 8 shown in FIG. The vertical articulated robot 3 transfers the fuel tank 1 onto the carry-out conveyor 8, then holds the fuel tank 1 on the carry-in conveyor 2, and transfers the fuel tank 1 into the correction cooling jig 5. The same operation will be repeated.

Here, the mechanism when the straightening cooling jig 5 moves on the conveying device 7 will be described. As shown in FIG. 3, a plurality of rollers 14 are provided on the transport device 7, and the correction cooling jig 5 is placed on the rollers 14. The movement of the correction cooling jig 5 on the transport device 7 is performed by the operation of the transport bar 17 and the positioning bar 18 shown in FIG. The transport bar 17 can be moved up and down and moved back and forth. Regarding the raising / lowering operation of the transport bar 17,
In FIG. 2, the operation is in a direction perpendicular to the paper surface, and the front side of the paper surface is raised and the back side of the paper surface is lowered. Further, the front-back movement of the transport bar 17 is the movement in the vertical direction of the paper surface in FIG. On the other hand, the positioning bar 18 can only perform the raising / lowering operation. This raising / lowering operation is an operation in the direction perpendicular to the paper surface in FIG. The side is descending.

Next, the positional relationship between the transport bar 17 and the straightening cooling jig 5 when the above-described transport bar 17 operates will be described. As shown in FIG. 4, the carrying bar 17 is provided with a small diameter pin 15a and a large diameter pin 16a, while
A small-diameter pin receiver 15b that can be fitted to the small-diameter pin 15a and a large-diameter pin receiver 16b that can be fitted to the large-diameter pin 16a are provided below the correction cooling jig 5. As shown in FIG. 4, the transport bar 17 is normally at the lower end and separated from the lower portion of the straightening cooling jig 5, but when the transport bar 17 operates, first, the transport bar 17 is raised (see FIG. 4).
At the upper end), and the transport bar 1 at the rising end
7 has a small diameter pin 15a and a large diameter pin 16a
The small-diameter pin receiver 15b and the large-diameter pin receiver 16b provided on the lower portion of the straightening cooling jig 5 are respectively fitted. Next, the transport bar 17 moves forward (moves to the left in FIG. 4), and the transport bar 17 includes the pins 15a, 15b, 16a, 1 described above.
The straightening cooling jig 5 fitted in 6b also moves. After the correction cooling jig 5 has been moved to the next positioning position, the transport bar 1
7 moves downward (moves downward in FIG. 4), and at this time, the fitting of the pins 15a, 15b, 16a, 16b described above is also released. The transport bar 17 that has reached the lower end moves backward (moves to the right in FIG. 4) and returns to the backward end.

The positioning bar 18 is the carrying bar 17
The positioning of the straightening cooling jig 5 in the horizontal direction is performed in a state where is not operating. The positioning bar 18 has a small-diameter pin and a large-diameter pin, which are not shown, similarly to the carrying bar 17, and is configured to position the correction cooling jig 5 in the horizontal direction by the small-diameter pin and the large-diameter pin when ascending. There is. The positioning bar 18 is at the rising end when the transfer bar 17 is not operating, and positions the correction cooling jig 5 in the horizontal direction, but is at the falling end when the transfer bar 17 is operating. Since the straightening cooling jig 5 is separated from the straightening cooling jig 5, it does not interfere with the straightening cooling jig 5 when the transporting bar 17 moves the straightening cooling jig 5.

Next, the compressed air for cooling the fuel tank 1 in the straightening cooling jig 5 will be described. As shown in FIG. 4, the straightening cooling jig 5 serves as a means for supplying the compressed compressed air included in the straightening cooling jig 5 and a means for supplying the compressed compressed air included in the carrying bar 17. The female coupler 21 supplies the compressed air for cooling. Specifically, the straightening cooling jig 5 includes a female coupler 21 embedded in a large-diameter pin 16 a installed on the carrying bar 17.
The compressed air for cooling the fuel tank 1 is received through the male coupler 19 provided in the large-diameter pin receiver 16b.
Similarly, the straightening cooling jig 5 includes a male coupler 20 as a means for supplying the compressed compressed air included therein and a female coupler (not shown) as a means for supplying the compressed compressed air included in the positioning bar 18. Compressed air for cooling is supplied by the coupler. Specifically, the straightening cooling jig 5
Receives compressed air for cooling the fuel tank 1 from a female coupler (not shown) embedded in a large-diameter pin (not shown) installed in the positioning bar 18 through the male coupler 20 shown in FIG.

Due to the structure, when the male coupler (for example, 19) and the female coupler (for example, 21) are fitted, that is, the pin (for example, large diameter pin 16a) and the pin receiver (for example, large diameter pin receiver 16b) are fitted. During that time, the straightening cooling jig 5 is supplied with the compressed compressed air. As described above, the pin and the pin receiver are fitted to each other when the carrier bar 17 is at the rising end and the positioning bar 18 is also at the rising end. Therefore, since the straightening cooling jig 5 receives the compressed compressed air from the transfer bar 17 during the movement by the transfer bar 17 and receives the compressed cooling air from the positioning bar 18 at other times, it is always cooled. It is receiving compressed air.

By the way, the straightening cooling jig 5 is provided with means for stopping the supply of the compressed compressed air. That is, in the straightening cooling jig 5, the female coupler 19 shown in FIG.
Alternatively, the compressed compressed air received from the female coupler 20 is sent to the nozzle 11 shown in FIG. 3 through the hand valve 22, and this hand valve 22 has two valve opening / closing air as shown in FIG. By opening and closing the handle 22a by the operation of the cylinder 23, the compressed compressed air to be sent to the nozzle 11 can be taken out or stopped. By installing a valve opening / closing cylinder 23 near the lid opening / closing cylinder 4 shown in FIG. 1 and interlocking the opening / closing operation of the hand valve 22 with the opening / closing operation of the lid 9, the vertical articulated robot 3 performs corrective cooling treatment. While the lid 9 of the tool 5 is opened and the fuel tank 1 is taken in and out, the discharge of the compressed compressed air from the nozzle 11 is stopped.

The embodiment of the present invention has been described above. As described above, in the present embodiment, the straightening cooling jig 5 uses the small-diameter pin 15 for the cyclic transport on the transport device 7.
Conveyor bar 17 with positioning pin such as a large pin 16
And the positioning bar 18, and the compressed compressed air is supplied by the coupler 1 of the carrying bar 17 and the positioning bar 18.
I am trying to receive from 9, 20, 21. Therefore, various corrective cooling jigs 5 can be used depending on the type of the fuel tank 1.
Even when the fuel tank 1 is prepared, the specifications of the positioning pins such as the small-diameter pin 15 and the large-sized pin 16 and the couplers 19, 20, and 21 in these various correction cooling jigs 5 are unified, A change in product type can be dealt with only by replacing the correction cooling jig 5 on the transport device 7. The automatic exchange of the correction cooling jig 5 on the transfer device 7 can be easily handled by installing another vertical articulated robot.

According to the present embodiment, in the case of the conventional natural cooling, it takes about 2 hours to cool the temperature from 100 ° C. to 60 ° C., but it is completed in about 20 minutes. On the other hand, it is possible to deal with the molded product carried out about every minute on the side by using more than 20 straightening cooling jigs 5. When the straightening / cooling jig 5 is automatically replaced by a vertical articulated robot (not shown), the straightening / cooling jig 5 can be replaced within 50 seconds.

[0024]

The cooling device for synthetic resin molded products according to the first aspect of the present invention has a carrying device on which a plurality of straightening cooling jigs can be placed, and this carrying device carries the straightening cooling jigs. Equipped with a carrying bar for moving to the next upper positioning position and a positioning bar for positioning the straightening cooling jig at each positioning position on the carrying device, and straightening while the straightening cooling jig moves on the carrying device. Since the synthetic resin molded product in the cooling jig is straightened and cooled, it has both the straightening cooling function and the temporary storage function for the synthetic resin molded product even if the straightening cooling time is longer than the molding time in the molding machine. By combining the corrective cooling jig and the transfer device, while each corrective cooling jig that stores the synthetic resin molded product moves on the transfer device where multiple corrective cooling jigs are placed, Goods that are efficiently straightened and cooled It became.

According to the second aspect of the present invention, the straightening cooling jig has the lower receiving member and the upper receiving member corresponding to the shape of the synthetic resin molded product. By preparing multiple units corresponding to the type of molded product, it is possible to easily cope with changes in the type of synthetic resin molded product by replacing the straightening cooling jig on the transfer device. It was

According to the third aspect of the present invention, the carrying bar has the means for supplying compressed air for cooling the synthetic resin molded product to the straightening cooling jig. , When this is in the state of moving between the positioning positions on the transfer device by the operation of the transfer bar, it receives the supply of the compressed compressed air from the means for supplying the compressed compressed air for the transfer bar. ,as a result,
The straightening cooling of the synthetic resin molded product is performed even when the straightening cooling jig is moving between the positioning positions on the transport device.

According to the invention of claim 4, the positioning bar has means for supplying compressed air for cooling the synthetic resin molded product to the straightening cooling jig. , When the positioning bar is positioned at the positioning position on the transfer device by the operation of the positioning bar, the cooling bar is supplied with the compressed compressed air from the means for supplying the compressed compressed air. As a result, the straightening cooling of the synthetic resin molded product is performed even when the straightening cooling jig is positioned at the positioning position on the transport device. Particularly, in combination with the carrying bar according to claim 3, the straightening cooling jig receives the compressed compressed air from the carrying bar during the movement by the carrying bar, and otherwise receives the compressed compressed air from the positioning bar. Since it is received, compressed air for cooling is always supplied, and as a result, the straightening cooling time can be shortened.

According to the invention of claim 5, the straightening cooling jig is provided with means for stopping the supply of the compressed compressed air. Therefore, the synthetic resin molded product is taken out from the straightening cooling jig and then Before inserting the synthetic resin molded product of, or when the supply of the synthetic resin molded product from the molding machine is interrupted,
This makes it possible to stop the discharge of the compressed compressed air when it is unnecessary, and it is possible to suppress the wasteful consumption of the compressed air.

[Brief description of drawings]

FIG. 1 is a plan view showing an overall configuration of a cooling device for a synthetic resin molded product according to an embodiment of the present invention.

FIG. 2 is a plan view showing a configuration of a straightening cooling jig 5 included in the cooling device shown in FIG.

FIG. 3 is a side view of the correction cooling jig 5 shown in FIG.

FIG. 4 is a perspective view of the transport bar 17 shown in FIG.
It is a block diagram which showed the structure for supplying compressed air to.

5 is a configuration diagram showing a structure of a hand valve 22 installed in the correction cooling jig 5 shown in FIG.

[Explanation of symbols]

1 Fuel Tank (Synthetic Resin Molded Product) 2 Carry In Conveyor 3 Vertical Articulated Robot 3a Operating Area 4 of the Vertical Articulated Robot 3 Air Cylinder for Lid Opening / Closing 5 Corrective Cooling Jig 6 Clamp Cylinder 7 Conveying Device 8 Carrying Conveyor 9 Lid 10 Lid clamp 11 Nozzle 12 Lower receiving member 13 Upper pressing member 14 Roller 15 Small diameter pin 15a Small diameter pin receiving 16 Large diameter pin 16a Large diameter pin receiving 17 Conveying bar 18 Positioning bar 19 Male coupler (for supplying compressed air for cooling) Means) 20 Male coupler (means for supplying compressed cooling air) 21 Female coupler (means for supplying compressed compressed air) 22 Hand valve (means for stopping supply of compressed cooling air) 22a Handle 23 of the hand valve 22 Air cylinder for opening / closing the valve (Hand for stopping the supply of the compressed air for cooling )

Continued front page    F term (reference) 4F203 AH17 AH55 AK02 DA05 DB01                       DC28 DD10 DJ08 DJ14 DM02                       DM23 DN01 DN08                 4F208 AH17 AH55 AK02 LB01 LW02                       LW15

Claims (5)

[Claims] 1. A synthetic resin molded product, which is molded by a molding machine and then cooled while straightening the synthetic resin molded product taken out from the molding machine by using a straightening cooling jig. In the cooling device, the cooling device has a carrying device on which a plurality of the straightening cooling jigs can be placed, and the carrying device moves the straightening cooling jig to a next positioning position on the carrying device. And a positioning bar for positioning the straightening cooling jig at each positioning position on the transporting device, and synthesizing in the straightening cooling jig while the straightening cooling jig moves on the transporting device. A cooling device for a synthetic resin molded product, which straightens and cools a resin molded product. 2. The cooling device for a synthetic resin molded product according to claim 1, wherein the straightening cooling jig has a lower receiving member and an upper receiving member corresponding to the shape of the synthetic resin molded product. 3. The synthetic resin molding according to claim 1, wherein the carrying bar has means for supplying compressed air for cooling the synthetic resin molded product to the straightening cooling jig. Cooling system for items. 4. The positioning bar according to claim 1, wherein the positioning bar has means for supplying compressed air for cooling the synthetic resin molded product to the straightening cooling jig. Cooling device for synthetic resin moldings. 5. The cooling device for a synthetic resin molded product according to claim 1, wherein the straightening cooling jig is provided with means for stopping the supply of the compressed compressed air. .