WO2020158274A1

WO2020158274A1 - Can body processing method and can body processing device

Info

Publication number: WO2020158274A1
Application number: PCT/JP2019/050956
Authority: WO
Inventors: 秀樹弓削; 靖広阿部
Original assignee: 東洋製罐株式会社
Priority date: 2019-01-31
Filing date: 2019-12-25
Publication date: 2020-08-06
Also published as: JP2020121337A; JP7211124B2; TWI721757B; TW202041298A

Abstract

A can body processing method and a can body processing device are provided which, even for diameter-reduction processing in which the diameter reduction processing area is long and there is a large amount of diameter reduction, can shorten processing time without having to increase the size of the equipment.　An inner tool (120) and a bottom tool (110) are moved towards the can body (K), and the inner tool (120) is inserted into an opening of the can body (K); in a state in which the relative positions of the can body (K), the inner tool (120) and the bottom tool (110) are fixed, these are moved towards an outer tool (130) and diameter-reduction processing is performed from the outer surface of the opening in the can body (K); and, in a state in which the relative positions of the inner tool (120) and the outer tool (130) are fixed, the can body (K) and the bottom tool (110) are retracted, pulling the can body out of the inner tool (120) and the outer tool (130).

Description

Can body processing method and can body processing apparatus

The present invention relates to a can body processing method and a can body processing apparatus for reducing the diameter of the body opening side of a bottomed cylindrical can body having one end opened.

It is known that a can body filled with a beverage or the like is formed into a cylindrical shape with a bottom by subjecting a plate material punched out in a circular shape to drawing and ironing, and then further reducing the diameter.
For example, in Patent Document 1, the inner tool (42) and the outer tool (41) facing the opening side (opening 103) of the can body (100) and the bottom side (102) of the can body (100) are facing each other. Bottom tool (50) for inserting the inner tool (42) into the opening (103) of the can body (100), and the outer tool (41) to open the opening (103) of the can body (100). It is described that the outer diameter is reduced.

Patent No. 5851529

In the known diameter reduction process, when removing the inner tool and the outer tool from the can body after the diameter reduction process, the inner tool, the bottom tool and the can body are integrated with the outer tool in the reverse procedure of the processing. By retreating, the outer tool is first detached from the can body, and then the inner tool is retracted with respect to the bottom tool to detach the inner tool from the can body.
In such a processing method, if the range of the diameter reduction processing such as a bottle can is long, the time of the diameter reduction process becomes long.
When the diameter-reducing processing is performed on the diameter-reducing processing turret, the pitch circle of the turret must be increased in order to lengthen the time of the diameter-reducing step, which causes a problem that the equipment becomes large.
Further, as shown in FIG. 1, it is general that a plurality of diameter-reducing turrets 101 are provided and the diameter-reducing processing is performed a plurality of times while being sequentially conveyed by a conveying turret 102, and the mouth portion is thin like a bottle can. In this case, since the amount of diameter reduction is also increased, it is necessary to increase the number of diameter reduction processing turrets 101, and there is a problem that the larger the diameter reduction processing turrets 101, the larger the entire equipment.

The present invention solves the above-mentioned problems, and the range of diameter reduction processing is long, and even in diameter reduction processing with a large amount of diameter reduction, the processing time can be shortened without increasing the equipment size. An object is to provide a can body processing method and a can body processing apparatus.

A can body processing method according to the present invention is a can body processing method of performing a diameter reduction process on a body opening side of a bottomed cylindrical can body having one end opened, and confronts the opening side of the can body. An inner tool and an outer tool, and a bottom tool facing the bottom side of the can body, and the can body is arranged between the inner tool and the outer tool and the bottom tool, and the inner tool and the The bottom tool is advanced toward the can body, the bottom tool holds the bottom of the can body and the inner tool is inserted into the opening of the can body, and the can body, the inner tool and the bottom tool are inserted. With the relative position fixed, the can body, the inner tool and the bottom tool are advanced toward the outer tool, and the outer tool is used to reduce the diameter of the can body from the outer surface. The problem is solved by retracting the can body and the bottom tool while pulling out the can body from the inner tool and the outer tool while fixing the relative positions of the inner tool and the outer tool. It is a thing.

Further, the can body processing device according to the present invention is a can body processing device that performs a diameter reduction process on the body opening side of a bottomed cylindrical can body having one end opened, and A tool driving unit having an inner tool and an outer tool facing each other, and a bottom tool facing the bottom side of the can body, for moving the inner tool and the bottom tool forward and backward toward the can body, and the tool driving unit. A drive control unit for controlling the operation of the inner tool, the drive control unit, when performing the diameter reduction processing, toward the can body disposed between the inner tool and the outer tool and the bottom tool. The tool and the bottom tool are advanced so that the bottom tool holds the bottom of the can body and the inner tool is inserted into the opening of the can body, and the can body, the inner tool and the bottom tool are relative to each other. With the position fixed, the can body, the inner tool, and the bottom tool are advanced toward the outer tool, and the outer tool reduces the diameter of the body of the can body from the outer surface, and then pulls it out. Sometimes, with the relative positions of the inner tool and the outer tool fixed, the can body and the bottom tool are retracted, and the can body is pulled out from the inner tool and the outer tool. The above-mentioned problems are solved.

According to the can body processing method and the can body processing apparatus of the present invention, the can body and the bottom tool are retracted while the relative positions of the inner tool and the outer tool are fixed, and the can is removed from the inner tool and the outer tool. By pulling out the body, it is possible to shorten the time of the diameter reduction process, and even in the case of diameter reduction processing with a long range and a large amount of diameter reduction, the pitch circle of the diameter reduction processing turret can be increased and the diameter reduction can be performed. This can be done without increasing the number of processing turrets, and the processing time can be shortened without increasing the size of equipment.

Arrangement explanatory drawing of the diameter reduction processing turret in a can body processing device. Explanatory drawing of a processing pocket. Shape explanatory drawing of an outer tool. Operation|movement explanatory drawing of the can processing apparatus which concerns on one Embodiment of this invention. Operation|movement explanatory drawing of the conventional can body processing apparatus.

A can body processing apparatus according to an embodiment of the present invention reduces the diameter of an opening of a bottomed cylindrical can body K having an opening at one end into a bottle shape. Therefore, for example, as shown in FIG. K is passed over a plurality of diameter-reducing turrets 101 and a transport turret 102, and is arranged so as to be sequentially processed between them.
Each of the diameter-reducing turrets 101 is provided with a plurality of processing pockets 103, and each of the processing pockets 103 performs diameter-reduction processing before the delivered can body K is delivered to the downstream transport turret 102.

As shown in FIG. 2, the processing pocket 103 includes a bottom tool 110 that supports the bottom of the can body K, an outer tool 130 that fits on the outer peripheral portion of the opening of the can body K to reduce the diameter, and a can body K. Inner tool 120 to be inserted into the opening.
The bottom tool 110 is provided with a suction hole 111 for sucking and holding the bottom of the can body K.
The bottom tool 110 and the inner tool 120 are configured to be capable of reciprocating independently in the vertical direction of the can body K by a drive mechanism (not shown).

As shown in FIG. 3, the outer tool 130 has, on its inner surface, an introduction portion 131 that guides the opening of the can body K, a straight portion 134 that improves roundness of the opening of the can body K, and a can body. It has a reduced diameter portion 135 and a land portion 132 for reducing the diameter on the body opening side, and an escape portion 133 provided in the back of the land portion 132. However, the straight portion 134 is not essential and may be provided as needed.
The clearance CL, which is the radial distance of the clearance 133 with respect to the land 132, is set to 0.07 mm or more, and more preferably 0.13 mm or more.
When the escape amount CL is less than 0.07 mm, the friction resistance between the outer tool 130 and the inner tool 120 and the can body K when the can body K is pulled out after the diameter reduction processing is increased, and there is a possibility that a pulling failure occurs.
If the clearance CL is too large, the outer diameter of the outer tool 130 becomes large, the pitch of the machining pocket 103 becomes large, and the pitch circle of the diameter-reducing turret 101 becomes large. It doesn't have to be very large.

The length LL of the land portion 132 in the advancing/retreating direction of the outer tool 130 is set to 1 mm or more and 10 mm or less, and more preferably 5 mm or less.
If the length LL of the land portion 132 is less than 1 mm, the contact distance with the can body K becomes short during the diameter reduction processing, and wrinkles may occur at the open end.
Further, when the length LL of the land portion 132 is larger than 10 mm, the friction resistance between the outer tool 130 and the inner tool 120 and the can body K when the can body K is pulled out after the diameter reduction processing is increased, and there is a possibility that a pulling failure occurs. is there.

The operation at the time of diameter reduction processing in the can body processing apparatus according to the embodiment as described above will be described.
According to the conventional can body processing method, first, as shown in FIG. 5A, the inner tool 120 and the outer tool 130 facing the opening side of the can body K, and the bottom facing the bottom side of the can body K. The can body K is arranged between the tool 110 and the tool 110.
Next, with the outer tool 130 fixed, the inner tool 120 and the bottom tool 110 are advanced toward the can body K as indicated by the arrow, and as shown in FIG. The inner tool 120 is inserted into the opening of the can body K while holding the bottom portion of K.

Then, with the relative positions of the can body K, the inner tool 120 and the bottom tool 110 fixed, the can body K is advanced toward the outer tool 130, and the outer body 130 opens the can body K as shown in FIG. 5C. The outer diameter of the part is reduced.
When the diameter reducing process is completed, the can body K, the inner tool 120, and the bottom tool 110 are fixed in a relative position, and the can body K is advanced in a direction away from the outer tool 130, as shown in FIG. 5(d1). Is pulled out from the outer tool 130.
Finally, the inner tool 120 and the bottom tool 110 are advanced in the direction away from the can body K as indicated by the arrow, and the inner tool 120 is pulled out from the can body K as shown in FIG. Release K and send to the next process.

On the other hand, according to the can body processing method according to the present invention, first, as shown in FIG. 4A, the inner tool 120 and the outer tool 130 facing the opening side of the can body K, and the can body K of the can body K. The can body K is arranged between the bottom tool 110 facing the bottom surface side.
Next, with the outer tool 130 fixed, the inner tool 120 and the bottom tool 110 are advanced toward the can body K as shown by the arrow, and as shown in FIG. The inner tool 120 is inserted into the opening of the can body K while holding the bottom portion of K.
Then, with the relative positions of the can body K, the inner tool 120 and the bottom tool 110 fixed, the can body K is advanced toward the outer tool 130, and as shown in FIG. 4C, the outer tool 130 opens the can body K. The outer diameter of the part is reduced. At this time, compressed air may be supplied to the can body K from the air supply hole 112 to positively pressurize the can body K to prevent buckling of the can body.

Up to this point, the process is similar to that shown in FIG. 5 described above, but the withdrawal by the can body processing method according to the present invention is performed with the relative position of the inner tool 120 and the outer tool 130 fixed and the can body K and the bottom tool. By retracting 110 and pulling out the can body K from the inner tool 120 and the outer tool 130 as shown in FIG. 4D, the can body K is released in one operation and sent to the next step. At this time, the compressed air is supplied to the can body K from the air supply hole 112 to reduce the force required for the withdrawal and suppress the withdrawal failure.

As a result, the operation of retracting the inner tool 120 in FIG. 5(d2) becomes unnecessary, and the range of the diameter reduction processing is long, and even if the diameter reduction processing is a large amount of diameter reduction, the processing is performed without increasing the size of the equipment. The time can be shortened.
Further, on the inner surface of the outer tool 130, there are provided an introducing portion 131 that guides the opening of the can body, a diameter reducing portion 134 and a land portion 132 that perform diameter reducing processing, and a relief portion 133 provided in the back of the land portion. By doing so, the friction resistance when pulling out the can body K from the inner tool 120 and the outer tool 130 is reduced while reliably reducing the diameter, and it is possible to smoothly pull out the can body K in one operation. Since the supply pressure of the compressed air at the time of drawing can be lowered, the running cost can be reduced.
Further, by optimizing the clearance amount CL and the length LL of the land portion 132, the can body K can be smoothly pulled out by one operation while performing the diameter reduction processing more reliably.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.
For example, in the can body processing method described above, the position of the outer tool 130 is fixed in all steps, but the outer tool 130 may move back and forth if the relative movements are the same.

101 ・・・ Reducing diameter turret 102 ・・・ Conveying turret 103 ・・・ Machining pocket 110 ・・・ Bottom tool 111 ・・・ Suction hole 112 ・・・ Air supply hole 120 ・・・ Inner tool 130 ・・・ Outer tool 131 ・・・Introduction part 132 ・・・Land part 133 ・・・Escape part 134 ・・・Straight part 135 ・・・Reduced diameter part CL ・・・Escape amount K ・・・Can body

Claims

A can body processing method for performing a diameter-reducing process on a body opening side of a bottomed cylindrical can body having one end opened,
An inner tool and an outer tool facing the opening side of the can body, and a bottom tool facing the bottom side of the can body,
Placing the can body between the inner tool and the outer tool and the bottom tool,
The inner tool and the bottom tool are advanced toward the can body, the bottom tool holds the bottom of the can body and the inner tool is inserted into the opening of the can body,
With the relative positions of the can body, the inner tool and the bottom tool fixed, the can body, the inner tool and the bottom tool are advanced toward the outer tool, and the body of the can body is moved by the outer tool. On the opening side of the part, diameter reduction processing is applied from the outside,
With the relative position of the inner tool and the outer tool fixed, the can body and the bottom tool are retracted, and the can body is pulled out from the inner tool and the outer tool. ..
A can body processing device for performing a diameter reduction process on a body opening side of a bottomed cylindrical can body having one end opened,
An inner tool and an outer tool facing the opening side of the can body, and a bottom tool facing the bottom side of the can body,
A tool drive unit for moving the inner tool and the bottom tool back and forth toward the can body, and a drive control unit for controlling the operation of the tool drive unit,
The drive control unit,
At the time of diameter reduction processing, the inner tool and the bottom tool are advanced toward the can body arranged between the inner tool and the outer tool and the bottom tool, and the bottom tool moves the can body. Hold the bottom and insert the inner tool into the opening of the can body,
With the relative positions of the can body, the inner tool and the bottom tool fixed, the can body, the inner tool and the bottom tool are advanced toward the outer tool, and the body of the can body is moved by the outer tool. On the opening side of the part, diameter reduction processing is applied from the outside,
At the time of pulling out, with the relative position of the inner tool and the outer tool fixed, the can body and the bottom tool are retracted, and the can body is pulled out from the inner tool and the outer tool. A can body processing device.
The inner surface of the outer tool is provided in an introduction portion that guides the opening of the can body, a reduced diameter portion and a land portion that perform diameter reduction processing on the body body opening side of the can body, and a land portion of the land portion. Has a relief portion,
The can body processing apparatus according to claim 2, wherein a radial distance (relief amount) between the land portion and the relief portion is 0.07 mm or more.
The can body processing device according to claim 3, wherein a radial distance (relief amount) between the land portion and the relief portion is 0.13 mm or more.
The can body processing apparatus according to any one of claims 2 to 4, wherein the length of the land portion in the advancing/retreating direction of the outer tool is 1 mm or more and 10 mm or less.
The can body processing apparatus according to claim 5, wherein the length of the land portion in the advancing/retreating direction of the outer tool is 5 mm or less.