TWI721757B - Tank processing method and tank processing device - Google Patents

Abstract

The present invention provides a can body processing method and a can body processing device, which can shorten the processing time and do not need to enlarge the equipment even in the diameter reduction processing with a long diameter reduction processing range and a large diameter reduction amount. Move the inner tool (120) and the bottom tool (110) toward the tank body (K), and insert the inner tool (120) into the opening of the tank body (K) to insert the tank body (K) and the inner tool (120) ) And the bottom tool (110) are moved toward the outer tool (130) while the relative positions of the bottom tool (110) are fixed. The diameter reduction process is performed from the outside of the opening of the tank (K), and the inner tool (120) and the outer tool ( When the relative position of 130) is fixed, the tank body (K) and the bottom tool (110) are retracted, and the tank body is pulled out from the inner tool (120) and the outer tool (130).

Description

Tank processing method and tank processing device

The present invention relates to a can body processing method and a can body processing device, which perform diameter reduction processing on the opening side of the can body of a bottomed cylindrical can body whose one end is opened.

Among cans filled with beverages and the like, there is known a plate that is punched into a circular shape by subjecting it to drawing and ironing processing to shape it into a bottomed cylindrical shape and then performing diameter reduction processing. For example, Patent Document 1 describes a processing device that has an inner tool (42) and an outer tool (41) facing the opening side (opening portion 103) of a can body (100), and a can body (100). The bottom side (102) of the bottom side (102) is opposed to the bottom tool (50), and the inside tool (42) is inserted into the opening (103) of the tank body (100), and then the outside tool (41) is removed from the tank body (100) The outer surface of the opening (103) is processed to reduce the diameter. [Prior Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent No. 5851529

(The problem to be solved by the invention)

In the well-known diameter reduction process, when the inner tool and the outer tool are detached from the can body after the diameter reduction process, the inner tool, the bottom tool and the can body are integrated and retracted relative to the outer tool in the reverse order of the process. Disengage the outer tool from the tank, and then retract the inner tool relative to the bottom tool to free the inner tool from the tank. In the above processing method, if the diameter reduction processing range of bottles, cans, etc. is longer, the time for the diameter reduction step is increased. When the diameter reduction process is performed on the diameter reduction processing turret, there is a problem that the pitch circle of the turret has to be increased in order to increase the time of the diameter reduction step, which results in an increase in the size of the equipment. In addition, as shown in FIG. 1, there are usually a plurality of diameter reduction processing turrets 101, and the diameter reduction processing is performed multiple times while being sequentially transported by the conveying turret 102. In the case of small mouths such as bottles and cans Since the amount of diameter reduction also increases, the number of diameter reduction processing turrets 101 needs to be increased. As each diameter reduction processing turret 101 becomes larger, there is a problem that the entire equipment becomes larger.

In view of this, the object of the present invention is to provide a can body processing method and a can body processing device, which can shorten the processing time and eliminate the need to reduce the processing time even in the diameter reduction processing with a long diameter reduction processing range and a large diameter reduction amount. Large-scale equipment. (Technical means to solve the problem)

In order to solve the above-mentioned problems, the can body processing method of the present invention is a can body processing method that performs diameter reduction processing on the opening side of the can body of a bottomed cylindrical can body with one end opened, and includes: an inner tool and The outer tool facing the opening side of the tank body; and the bottom tool facing the bottom surface side of the tank body; the tank body is arranged between the inner tool and the outer tool and the bottom tool so that the inner tool And the bottom tool moves toward the tank body, the bottom tool is used to hold the bottom of the tank body and the inner tool is inserted into the opening of the tank body to fix the relative positions of the tank body, the inner tool, and the bottom tool In the state, the can body, the inner tool, and the bottom tool are moved toward the outer tool, and the outer tool is used to reduce the diameter of the opening side of the can body from the outside, and the inner tool In a state where the relative positions of the outer tool and the outer tool are 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.

In order to solve the above-mentioned problems, the can processing device of the present invention is a can processing device that performs diameter reduction processing on the opening side of the can body of a bottomed cylindrical can whose one end is opened, and includes: an inner tool and The outer tool facing the opening side of the tank body; and the bottom tool facing the bottom surface side of the tank body; and it has a tool driving part that causes the inner tool and the bottom tool to advance and retreat toward the tank body, and a control The drive control unit for the operation of the tool drive unit, the drive control unit, during the necking process, directs the inner tool and the bottom tool toward the tank arranged between the inner tool, the outer tool, and the bottom tool The body travels, the bottom of the can body is held by the bottom tool, the inner tool is inserted into the opening of the can body, and the relative positions of the can body, the inner tool, and the bottom tool are fixed, so that The can body, the inner tool, and the bottom tool are moved toward the outer tool, and the outer tool is used to reduce the diameter of the opening side of the can body from the outside. When pulling out, the inner tool and In a state where the relative position of the outer tool is 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. (Compared with the effect of previous technology)

According to the can body processing method and the can body processing device 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 body is pulled out from the inner tool and the outer tool, Thereby, the time of the diameter reduction step can be shortened, and even in the diameter reduction process with a long range and large diameter reduction, it is not necessary to increase the pitch circle of the diameter reduction processing turret or to increase the diameter reduction processing turret. It responds to the number of cases, and the processing time can be shortened without increasing the size of the equipment.

In the can processing device according to one embodiment of the present invention, in order to reduce the diameter of the opening of the bottomed cylindrical can K whose one end is opened into a bottle shape, for example, as shown in FIG. 1, the can K It is delivered to a plurality of diameter reduction processing turrets 101 and conveying turrets 102, and is arranged in a manner of sequential processing between them. Each diameter reduction processing turret 101 is provided with a plurality of processing bag portions 103, and each processing bag portion 103 performs diameter reduction processing during the time when the transferred tank K is delivered to the downstream conveying turret 102.

As shown in FIG. 2, the processing bag portion 103 is provided with: a bottom tool 110 that supports the bottom of the can body K; an outer tool 130 that fits into the outer periphery of the opening of the can body K to reduce the diameter; and an inner tool 120, which is inserted into the opening of the tank K. The bottom tool 110 is provided with a suction hole 111 for sucking and holding the bottom of the tank K. The bottom tool 110 and the inner tool 120 are configured to independently reciprocate in the upper and lower directions of the tank K by a driving mechanism (not shown).

As shown in Figure 3, the outer tool 130 has an introduction part 131 for guiding the opening of the can body K on its inner surface, a straight part 134 for improving the roundness of the opening of the can body K, and the can body The reduced diameter part 135 and the land part 132 which are processed by reducing the diameter on the opening side of the part, and the escape part 133 provided at the rear part of the flat part 132. However, the straight portion 134 is not necessary, and can be appropriately set according to the needs. The radial distance of the escape portion 133 with respect to the flat portion 132, that is, the escape amount CL, is set to 0.07 mm or more, more preferably 0.13 mm or more. In the case where the escape amount CL is less than 0.07 mm, when the can body K is pulled out after the diameter reduction process, the frictional resistance between the outer tool 130 and the inner tool 120 and the can body K increases, and there may be a case where the can body K is pulled out. If the escape amount CL is too large, the outer diameter of the outer tool 130 will increase, and the pitch of the processing pocket 103 will increase, and the pitch circle of the reduced diameter processing turret 101 may increase. Therefore, it is not necessary to make the escape amount CL larger than the total. Need more.

The length LL of the flat portion 132 in the advancing and retreating direction of the outer tool 130 is set to 1 mm or more and 10 mm or less, more preferably 5 mm or less. When the length LL of the flat portion 132 is less than 1 mm, the contact distance with the can body K during diameter reduction processing becomes shorter, and wrinkles may occur at the opening end. In addition, when the length LL of the flat portion 132 is greater than 10 mm, the frictional resistance between the outer tool 130 and the inner tool 120 and the can body K increases when the can body K is pulled out after the diameter reduction process, which may lead to failures in the pulling out. .

Hereinafter, the operation at the time of diameter reduction processing in the can processing apparatus according to one of the above-mentioned embodiments will be described. According to the conventional tank processing method, first, as shown in FIG. 5(a), the tank K is arranged between the inner tool 120 and the outer tool 130 and the bottom tool 110. The inner tool 120 and the outer tool 130 are connected to the tank. The opening side of K is opposed to each other, and the bottom tool 110 is opposed to the bottom side of the tank K. Next, while maintaining the state where the outer tool 130 is fixed, the inner tool 120 and the bottom tool 110 are moved toward the tank K as shown by the arrow. As shown in FIG. 5(b), the bottom tool 110 is used to hold the bottom of the tank K And insert the inner tool 120 into the opening of the tank K.

Then, while the relative positions of the tank K, the inner tool 120, and the bottom tool 110 are fixed, move toward the outer tool 130, as shown in FIG. 5(c), with the outer tool 130 from the opening of the tank K The outside is reduced in diameter. When the diameter reduction process is completed, the relative positions of the tank K, the inner tool 120 and the bottom tool 110 are fixed, and the tank K is moved in the direction separating from the outer tool 130. As shown in FIG. 5(d1), the tank K Pull out from the outer tool 130.

Finally, make the inner tool 120 and the bottom tool 110 move away from the tank K as shown by the arrow, as shown in Figure 5 (d2), pull the inner tool 120 out of the tank K, release the tank K and transfer it Go to the next step.

In contrast, according to the can processing method of the present invention, first, as shown in FIG. 4(a), the can body K is arranged between the inner tool 120 and the outer tool 130 and the bottom tool 110, and the inner tool 120 and the outer tool 130 is opposed to the opening side of the tank K, and the bottom tool 110 is opposed to the bottom side of the tank K.

Next, while maintaining the state of fixing the outer tool 130, the inner tool 120 and the bottom tool 110 are moved toward the tank K as shown by the arrow, as shown in FIG. 4(b), the bottom tool 110 is used to hold the bottom of the tank K And insert the inner tool 120 into the opening of the tank K.

Then, while maintaining the state of fixing the outer tool 130, and maintaining the relative positions of the tank K, the inner tool 120, and the bottom tool 110, proceed toward the outer tool 130, as shown in FIG. 4(c), The diameter reduction process is performed from the outer surface of the opening of the can body K by the outer tool 130. At this time, compressed air can also be supplied to the can body K from the air supply hole 112 to form a positive pressure on the can body K to prevent the can body from bending.

So far, it is the same as that shown in FIG. 5, but the extraction performed by the can processing method of the present invention is to fix the relative positions of the inner tool 120 and the outer tool 130 to make the can body K and The bottom tool 110 retreats, as shown in FIG. 4(d), by pulling out the can body K from the inner tool 120 and the outer tool 130, the can body K is released in one action and transferred to the next step. At this time, by supplying compressed air to the can body K from the air supply hole 112, the force required for pulling out is reduced, thereby suppressing the pulling out failure.

Therefore, the movement of retreating the inner tool 120 in FIG. 5(d2) is unnecessary, and even in the diameter reduction process with a long diameter reduction processing range and a large diameter reduction amount, the processing time can be shortened without the need to increase the size of the equipment. . In addition, the inner surface of the outer tool 130 has an introduction portion 131 for guiding the opening of the can body, a diameter-reducing portion 134 and a flat portion 132 for reducing the diameter, and an escape portion 133 provided at the rear of the flat portion, thereby , The diameter reduction can be performed reliably, and the frictional resistance when the can body K is pulled out from the inner tool 120 and the outer tool 130 can be reduced, the can body K can be pulled out smoothly in one movement, and the compression during pulling out can be reduced The supply pressure of air can therefore reduce operating costs. In addition, by optimizing the escape amount CL and the length LL of the flat portion 132, the diameter reduction process can be performed more reliably, and the can body K can be pulled out smoothly in one operation.

The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-mentioned embodiments. For example, in the can processing method described above, the position of the outer tool 130 is fixed in all steps, but as long as the relative movement is the same, the outer tool 130 can also advance and retreat.

101: Reduced diameter processing turret 102: Transport turret 103: Processing bag department 110: bottom tool 111: Attraction hole 112: air supply hole 120: Inside tool 130: Outer tool 131: Introduction Department 132: Flat part 133: Escape Department 134: Straight 135: Reduced diameter part CL: escape volume K: tank

Fig. 1 is an explanatory diagram of the arrangement of the reduced diameter processing turret of the tank processing device. Fig. 2 is an explanatory diagram of a processed bag portion. Figure 3 is an explanatory diagram of the shape of the outer tool. 4(a) to (d) are operation explanatory diagrams of the can processing apparatus according to one embodiment of the present invention. 5(a) to (d2) are operation explanatory diagrams of the conventional can processing device.

110: bottom tool

120: Inside tool

130: Outer tool

K: tank

Claims (6)

A can body processing method, which is a can body processing method that performs diameter reduction processing on the opening side of the can body of a bottomed cylindrical can body whose one end is opened, and is characterized in that it has: The inner tool and the outer tool are opposed to the open side of the above-mentioned tank; and The bottom tool, which faces the bottom side of the above-mentioned tank; The tank body is arranged between the inner tool and the outer tool and the bottom tool, Moving the inner tool and the bottom tool toward the can body, holding the bottom of the can body with the bottom tool, and inserting the inner tool into the opening of the can body, While the relative positions of the tank body, the inner tool, and the bottom tool are fixed, the tank body, the inner tool, and the bottom tool are moved toward the outer tool, and the tank is moved from the outside by the outer tool. The opening side of the can body of the body is reduced in diameter, In a state where the relative positions of the inner tool and the outer tool are 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, which is a can body processing device that performs diameter reduction processing on the opening side of the can body of a bottomed cylindrical can body whose one end is opened, and is characterized in that it is provided with: The inner tool and the outer tool are opposed to the open side of the above-mentioned tank; and The bottom tool, which faces the bottom side of the above-mentioned tank; And it has a tool drive unit that advances and retracts the inner tool and the bottom tool toward the tank body, and a drive control unit that controls the operation of the tool drive unit, The drive control unit moves the inner tool and the bottom tool toward the can body arranged between the inner tool, the outer tool and the bottom tool during the necking process, and the can body is held by the bottom tool And insert the inner tool into the opening of the tank, and While the relative positions of the tank body, the inner tool, and the bottom tool are fixed, the tank body, the inner tool, and the bottom tool are moved toward the outer tool, and the tank is moved from the outside by the outer tool. The opening side of the can body of the body is reduced in diameter, When pulling out, in a state where the relative positions of the inner tool and the outer tool are 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 can body processing device of claim 2, wherein the inner surface of the outer tool has: an introduction part that guides the opening part of the can body; a reduced diameter part and a flat part that perform the can body opening of the can body Diameter reduction processing on the side; and the escape part, which is located behind the flat part, The radial distance (escape amount) between the flat portion and the escape portion is 0.07 mm or more. The can processing device according to claim 3, wherein the radial distance (escape amount) between the flat portion and the escape portion is 0.13 mm or more. The can processing device according to any one of claims 2 to 4, wherein the length of the flat portion in the advancing and retreating direction of the outer tool is 1 mm or more and 10 mm or less. The can processing device of claim 5, wherein the length of the flat portion in the advancing and retreating direction of the outer tool is 5 mm or less.

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