JP2718719B2 - Method for manufacturing a can container in which a can lid is double-wrapped and neck-in processed - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for subjecting a can body of a can container to deep neck-in processing, and double-tightening a can lid on the can body to close the can body.

(Prior Art) Conventionally, a can lid is fitted over a can body, subjected to a winding process to form a double winding, and closed to form a neck-in portion by performing a neck-in process on the can body. A method for manufacturing a can is known.

In order to manufacture such a container, the present applicant has previously disclosed in Japanese Patent Publication Nos. 62-19927 and 62-137640, a double-winding device and a neck simultaneously with the double-winding device. A method and apparatus for manufacturing a neck-in processing container by performing in-processing are proposed.

As a result, it is possible to simultaneously perform neck-in processing on the can body and double-tightening of the can lid fitted on the can body, thereby improving work efficiency, and enabling more accurate winding. .

However, when neck-in processing is performed further deeply in order to make can containers more easily stackable and at the same time greatly reduce can lid material, the neck-in processing part is restored by elasticity of the container body generated in the relevant part at the time of neck-in processing. The predetermined bending angle cannot be obtained, and wrinkles are generated by abrupt processing, so that it is likely to be incomplete neck-in processing. As a result, when the can lid is later tightened, inconvenience occurs in winding. There was something.

Conventionally, for deep neck-in processing, processing is generally performed by a so-called die method using a neck-in processing die. Thereafter, double canning of the can lid is performed. Therefore, the step of neck-in processing and the step of winding processing are performed separately, and the number of working steps increases. Furthermore, in the case of a so-called separate can body used for a food can formed in a predetermined length of a short can body by cutting and dividing a tall can body having a plurality of can body lengths with a cutter or the like, the cutting time is reduced. Since the folded edge is formed at the cutting portion by the pressing force of the cutter, it is difficult to insert the folded edge into the neck-in processing die. for that reason,
In order to perform neck-in processing on a separate can body by a die method, it is necessary to turn a side where a folded edge is not formed to a die for neck-in processing, which further increases the number of working steps.

(Problems to be Solved by the Invention) The present invention solves such conventional inconveniences, facilitates deep neck-in processing on a can body without lowering work efficiency, and further attaches a can lid to the can body. It is an object of the present invention to provide a method capable of performing double winding with high accuracy and reliability.

(Means for Solving the Problems) In order to solve the above-mentioned inconvenience, the present invention includes a step of performing a primary neck-in process on one end of a can body provided with a flange portion, and then including a seaming panel portion. A step of fitting a can lid on the can body and preliminarily winding the can lid on the can body while simultaneously further deepening the primary neck-in portion and performing a secondary neck-in processing; Subjecting the part to final winding and performing double winding.

According to the present invention, the primary neck-in processing is independently performed for preliminary processing, and then the neck-in processing is performed simultaneously with the preliminary winding. Here, preferably, the third neck-in processing is performed simultaneously with the final tightening processing.

In addition, a cylindrical can body having a plurality of upright can body lengths,
A step of inserting a roll cutter into the inside of the can body to cut and divide it into a plurality of pieces to form a can body of a predetermined length; a step of aligning the divided can bodies in an upright state; and then opening both ends of the can body. Inserting a flange forming die into the part and pressing to flange the opening, and subsequently inserting a necking roll inside the can body to perform primary neck-in processing at one end of the can body; Thereafter, a can lid provided with a seaming panel portion is fitted on the outer periphery of the chuck wall portion connected to the panel portion on the can body, and a rotary seaming chuck is inserted into the chuck wall portion to prepare the can lid. A step of performing a secondary neck-in process by further deepening the primary neck-in portion of the can body while simultaneously performing the winding process; and subsequently, inserting a rotary seaming chuck into the chuck wall portion to finalize the can cover. The process of applying double winding And wherein the Rukoto.

(Operation) By such means, the present invention preliminarily forms a desired neck-in shape by primary neck-in processing. This primary neck-in processing is performed on the can body in advance to reduce the restoring action due to the elasticity of the can body during the secondary neck-in processing. Subsequently, double-tightening is performed while simultaneously performing neck-in processing while gradually increasing the neck-in amount while tightening.

Further, in the present invention, first, a cylindrical can body having a plurality of can body lengths is cut to form a separate can body having a predetermined length. The can body is cut by inserting a roll cutter therein. At this time, a folded edge is formed outward of the can body at the cut portion of the separate can body.
Since the next neck-in process is performed by the flange forming die and the necking roll inserted into the inside of the can body, the presence or absence of the folded edge does not hinder the continuous operation.

(Example) An example of an embodiment of the present invention will be described in more detail with reference to the drawings.

FIG. 1 shows an apparatus for carrying out the method of the present invention, wherein 1 is a cutting apparatus for cutting a can body a having a plurality of can body lengths in an upright state, and 2 is a flange at both ends of the cut can body a '. 3 is a primary neck-in processing device for performing primary neck-in processing on the can body a ', 4 is a pre-tightening of the can lid b fitted on the can body a', and A primary winding apparatus 5 for performing a secondary neck-in processing on the body a 'is a secondary winding apparatus 5 for final-tightening the can lid b after the preliminary winding.

An embodiment of the present invention will be described according to the present embodiment configured as described above.

First, a can body a having a plurality of can body lengths is sent to the cutting device 1 by the screw conveyor 7 of the loading section 6. The cutting device 1 comprises a turret 8, a first holding groove 9, a second holding groove 10, and a roll cutter 11 provided in the turret 8, as shown in FIGS. The first holding groove 9 and the second holding groove 10 are adjacently provided as a pair, and the can body a is intermittently held. The upper half of the partition wall 12 between the pair of adjacent holding grooves 9, 10 is omitted. The can body a is locked in the first holding groove 9 of the turret 8 in an upright state, and is conveyed by the rotation of the turret 8. At this time, as shown in the second illustration, the roll cutter 11 enters the can body a from the lower part of the opening of the can body a, and the can body a
The upper and lower portions are cut while being held in the holding grooves 9. Here, two so-called separate can bodies a 'are formed as a pair of upper and lower can bodies from a can body a having a plurality of can body lengths. The turret 8
Is further rotated, and after cutting, the can body a 'is stacked vertically.
Passes right below the alignment member 13. The alignment member 13 includes a holding portion 14 having a magnet that can hold the upper can body a ′,
The turret 8 includes a guide portion 15 which is connected to the holding portion 14 and has a slope which descends in the rotation direction of the turret 8. The upper can body a 'is held by the holding portion 14, and the lower can body a' is conveyed while being held in the first holding groove 9. The can body a 'held by the holding portion 14 is pushed by the peripheral wall of the second holding groove 10 and guided to the guide portion 15 when the second holding groove 10 comes directly below. And
The upper can body a 'falls into the second holding groove 10 and is held.
Thus, the upper and lower can bodies a 'are vertically divided and aligned in the upright state.

The can bodies a 'are sequentially carried out of the cutting device 1 and transferred to the flanging device 2, respectively.

In the flange processing apparatus 2, as shown in FIG. 4, an upper flange forming die disposed on a peripheral portion of the rotating plate 16 is provided.
17 and a lower flange forming die 18 that can move up and down from a lower portion provided below and facing the upper flange forming die 17 are respectively inserted from both ends of the can body a ′, and are conveyed while being clamped from above and below. You. Then, as the plate 16 rotates, the lower flange forming die 18 rises, and the can body a 'is pressed to form a flange c on the entire periphery of both ends.

The can body a 'is then sent from the flange processing device 2 to the primary neck-in processing device 3.

In the primary neck-in processing device 3, as shown in FIG. 5, a can body a 'is sandwiched between a rotating upper plate 19 and a lower plate 20. The plates 19 and 20 rotate in the same direction, and the can body a 'is conveyed with the rotation. At this time, the necking roll 22 is introduced into the can body a 'from below through the through hole 21 of the lower plate 20 below the opening of the can body a'. The necking roll 22 rotates in conjunction with the rotation of the plates 19, 20. As the plates 19, 20 rotate, the necking segment 23 approaches the neck-in processing portion of the can body a ', and a predetermined amount of primary neck-in processing is performed by the pressing by the necking roll 22. You.

The can body a 'is further provided with a can body transfeeder shown in FIG.
The primary winding device 4 is delivered by 24. At this time, the can lid b is carried by the can lid trans-feeder 25, and the can lid b is overlaid on the can body a ′ conveyed by the can body trans-feeder 24.

In the primary winding device 4, as shown in FIG. 6, a rotary can body chuck 27 provided on the peripheral portion of an upper plate 26 on which the can body a 'rotates, and the rotary can chuck ascends from the lower portion through a can lid b. It is clamped by the freely rotatable seaming chuck 28. The chucks 27 and 28 rotate in the same direction, and the can body a '
Is conveyed with the rotation of the upper plate 26 while rotating. Then, as shown in FIGS. 7 and 8,
Can body a 'and can lid b on which the seaming segment 29 rotates.
First, the seaming panel d at the peripheral edge of the can lid b is pressed to start winding, and then the primary neck-in processing part of the can body a 'together with the seaming panel d. Press e to perform secondary neck-in processing. The bending angle of the neck-in processing at this time is determined by the slope angle of the jaw 30 provided on the seaming segment 29, and the slope angle of the jaw 30 is an angle required for the secondary neck-in processing.
Further, the can lid b is preliminarily tightened by the seaming group 31 provided adjacent to the jaw 30. Here, since the primary neck-in processing is previously performed on the can body a 'by the primary neck-in processing device 3, the secondary neck-in processing is reduced, and the neck-in processing part e of the can body a' is gradually provided. Since the neck-in is formed, the neck-in processing is performed without wrinkles. Further, the can body a 'is a primary neck-in processing device 3
Since the primary neck-in processing part e is formed in advance, the pre-tightening in which the seaming group 31 presses the seamig panel part d considerably progresses, and the jaw part 30 starts the secondary neck-in processing. The tightening dimensions are stable, and the can lid b is accurately wound.

The can body a ', on which the can lid b has been pre-wound, is transferred to the secondary winding apparatus 5.

The secondary fastening device 5 is different from the primary fastening device 4 shown in FIG. 6 only in that the inclination angle of the jaw 33 of the seaming segment 32 and the fastening shape of the seaming group 34 are different. It has the same configuration as. Here, the ninth
As shown in FIG.
The next neck-in processing part e is further deepened to make the final neck-in processing, and at the same time, the can lid b is pressed by the shape of the seaming group 34 to perform final winding.

Then, the can body a ', which is neck-in processed in a perfect shape,
The can lid b is securely wound around the can body a 'and is carried out from the carrying-out part 35 shown in FIG.

In the present invention, as described above, a second can body a ′ having a plurality of can body lengths is cut and then formed on a separate can body a ′.
It is not necessary to turn the illustrated folded edges f, f side to the same side, and the work can be carried out continuously while transporting the can body a 'in all the work steps, so that work efficiency is high.

(Effects of the Invention) As is clear from the above, according to the present invention, since neck-in processing is performed gradually in several orders, wrinkles are generated without the restoring action due to the elasticity of the can body. A deep neck-in can be formed, and at the same time, the neck-in processing is performed while the can lid is being tightened, so that accurate double-tightening can be performed.

Further, according to the present invention, since the deep neck-in processing can be performed without employing the die method as in the related art, the folded edge of the separate can body does not particularly hinder, so that the folded edge is in the same direction. Therefore, the work efficiency can be improved even in the neck-in processing on the separate can body and the double winding processing.

[Brief description of the drawings]

1 to 9 show an embodiment of the present invention.
FIG. 1 is a schematic view showing the entire apparatus, FIG. 2 is a diagram for explaining a cutting process of a can body, FIG. 3 is a perspective view for explaining a turret and an alignment member of the cutting apparatus, and FIG. 4 is an explanatory sectional view showing a flange forming step, FIG. 5 is an explanatory sectional view showing a primary neck-in processing step, and FIG. 6 is an explanatory sectional view showing a preliminary winding and a secondary neck-in processing step. 7 and 8 are explanatory partial enlarged views of FIG. 6, and FIG. 9 is an explanatory partial sectional view showing a final winding step. 11 ... roll cutter, 13 ... alignment member, 17,18 ... flange forming die, 22 ... necking roll, a ... can body, b ... can lid, e ... neck-in part, d ... sea Ming panel part.

Claims (3)

(57) [Claims] A first neck-in process at one end of a can body provided with a flange portion, and then a can cover provided with a seaming panel portion is fitted to the can body to attach the can cover to the can body. The primary neck-in portion is further deepened at the same time
The step of performing the next neck-in processing and the step of subsequently performing the final winding processing on the preliminary winding-up section and performing the double-winding processing, wherein the can lid is double-tightened and the neck-in processing is performed. Manufacturing method for cans. 2. The method according to claim 1, wherein a tertiary neck-in process is performed simultaneously with the final winding process. 3. A step of inserting a roll cutter into the can body, cutting the cylindrical can body having a plurality of upright can body lengths, cutting the plurality of can bodies into a plurality of can bodies, and forming a predetermined length of can body. Aligning the divided can bodies in an upright state, and then inserting and pressing a flange forming die into both end openings of the can body to form a flange in the opening; and subsequently, necking inside the can body A step of inserting a roll to perform primary neck-in processing on one end of the can body, and thereafter covering a can lid provided with a seaming panel portion on the outer periphery of a chuck wall portion connected to the panel portion, on the can body. Fitting, inserting a rotary seaming chuck into the chuck wall portion and pre-tightening the can lid while simultaneously further deepening the primary neck-in portion of the can body to perform a secondary neck-in process; Rotating seaming chuck on the chuck wall Inserted can end double seamed to necking process for the preparation of the can container, characterized in that comprising a step of subjecting the final seamed processed to double seaming the the can lid.