JP2845170B2 - Molding system for can having three-dimensional shape, can body molding apparatus, and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding system for a can having a three-dimensional shape, an apparatus for molding a can body, and a method for producing the same.
In particular, the present invention relates to a can molding system having a three-dimensional shape capable of producing a can of any shape, a can body molding apparatus, and a method for producing the same.

[0002]

2. Description of the Related Art At present, various devices have been proposed as devices for forming a predetermined three-dimensional shape on a can body. One of them is Japanese Patent Application No. 47-69241. This device is a device generally called a split type, as shown in FIG.

FIG. 11A is a cross-sectional view of the apparatus, and FIG.
(B) has shown the AA 'cross section of Fig.11 (a).
This device is configured so that a pyramid member 91 is disposed around an axis 90 and has a polygonal cross section. The shaft 90 is formed in a tapered shape in which the upper portion is thicker and becomes thinner downward.
The upper portion is thinner and has a shape that becomes thicker downward corresponding to the shape of the shaft 90.

In order to form a three-dimensional shape on the can body, a can material previously formed into a cylindrical shape is fitted around the pyramid member, and the shaft 90 is pushed down to expand each pyramid member 91 radially. . By the operation of the shaft 90, the periphery of the can material is radially pushed out by the respective pyramid members 91, and a three-dimensional shape is formed on the can body.

[0005] In addition, an apparatus for forming a three-dimensional shape on a can body using an elastic member has been proposed, and examples thereof include Japanese Patent Application Nos. 49-101181 and 49-91503.

FIGS. 12 (a) and 12 (b) show an apparatus described in Japanese Patent Application No. 49-101181. This device is composed of a pressing member 93 having an air vent hole 92 at the center, and an elastic member 95 having a hollow portion 94 into which the pressing member 93 is inserted and having a constricted portion at the top.

In order to form a three-dimensional shape on a can body using this apparatus, the can is fitted into an outer mold provided with predetermined irregularities,
Insert the device inside the can. In this state, the pressing member 93
Is pressed down to press the elastic member 95, the elastic member 95 is deformed inside the can, and the periphery of the can is pushed into the concave portion of the mold, thereby forming a three-dimensional shape on the can. The air remaining in the hollow portion 94 of the elastic member 95 is
The air is discharged to the outside through an air vent hole 92 provided at the bottom.

FIG. 13 shows an apparatus described in Japanese Patent Application No. 49-91503. In this device, the die 9
A ring-shaped concave strip 97 is provided around the inner wall of each of 6, 6 and 96.
The punch 100 is provided on the ram 99. Next, punch 10
When the punch 100 is immersed in the dies 96 and 96 by lowering the ram 99 and attaching the cylindrical elastic member 101 to the outer periphery of the cylindrical member 0, the elastic member hits a position corresponding to the annular groove 97 of the die 96. An annular cavity 102 is provided inside 101.
Further, a hydraulic pressure generating cylinder 103 is provided between the ram 99 and the die 96.
Is formed so that the hydraulic pressure in the hydraulic pressure generating cylinder 103 increases as the ram 99 descends, and the pressure oil in the hydraulic pressure generating cylinder 103 communicates with the cavity 102.

In the above arrangement, the pressure oil is supplied to the cavity 102 by lowering the ram 99 so that the annular ridge 104 bulges around the outer wall of the elastic member 101, and a part of the can 80 is moved to the dies 96, 96. Into the annular groove 97 of the
A three-dimensional shape is molded on the body of the can.

[0010]

However, the above-described apparatus has the following problems.

(1) When a three-dimensional shape is molded on a can body by using the apparatus disclosed in Japanese Patent Application No. 47-69241, there is a problem that cracks are left on the can body and that the inside of the can is damaged. . In this device, for example, a three-dimensional pattern,
It is not possible to mold embosses of various shapes into cans.

(2) According to the apparatus disclosed in Japanese Patent Application No. 49-101181, a thick elastic member is pressed by a pressing member to be elastically deformed, and the can is expanded into a concave portion of the die to form a three-dimensional shape on the can body. Due to molding, there is a problem that a fine pattern cannot be clearly expressed.

(3) Similarly, the device disclosed in Japanese Patent Application No. 49-91503 has a problem that a fine pattern cannot be clearly formed because a thick elastic member is used.
In addition, it is necessary to provide a cavity for introducing pressure oil in a portion corresponding to the concave portion of the die for forming a three-dimensional shape in the can, which limits the degree of freedom of the three-dimensional shape that can be formed. is there.

Accordingly, an object of the present invention is to provide a molding system for a can having a three-dimensional shape, a can body molding apparatus, and a method for producing the same, which can produce a can having an unprecedented free shape. .

Another object of the present invention is to provide a can molding system having a three-dimensional shape, a can body molding apparatus, and a method for manufacturing the same, which can clearly mold a finely shaped emboss into a can body. is there.

Another object of the present invention is to provide a can molding system having a three-dimensional shape, a can body molding apparatus, and a method for producing the same, which can produce cans of any shape with one apparatus. .

Another object of the present invention is to provide a can forming system, a can body forming apparatus, and a method of manufacturing a can having the method of manufacturing the can having a three-dimensional shape with a simple structure and improved safety and workability. To provide.

[0018]

SUMMARY OF THE INVENTION The inventor of the present invention provides a can having a smooth shape without damaging the can.
We have been conducting various researches and experiments from the viewpoint of what means should be used to clearly produce fine shapes.
As a result, the can is put into a mold having a predetermined shape, a device using an elastic member is inserted into the can, and this elastic member is a device that expands with some pressure.The elastic member is made as thin as possible. In addition, it has been found that the object can be achieved by providing a means capable of holding the elastic member so as not to come off from the device even under a pressure capable of deforming (expanding) the can.

That is, in order to achieve the above object, the first
In the invention of the above, after the can is fitted into the outer mold having the three-dimensional design applied to the inner surface, the can is inserted into the can body, the can is pressed from the inside toward the outer mold, and the can is moved along the inner surface of the outer mold. In an apparatus for performing deformation processing, a first fluid passage is provided in an apparatus body, and
A concave portion is provided on the upper and lower sides of the device main body, a wedge-shaped portion is provided around the entire inner wall of the concave portion, the outer periphery of the device main body is covered with a thin film elastic member, and the thin film elastic member is folded into the concave portion, and a sealing member is inserted into the concave portion. And a second fluid passage connected to the first fluid passage is provided in at least one of the sealing members. .

In the can body forming apparatus, a plurality of first fluid passages are provided extending radially from a center position between the concave portions, and the second fluid passages are connected to the plurality of first fluid passages at the center position. Then, it is possible to connect the pump to the fluid passage and supply the pressurized fluid to the apparatus main body to expand the thin film elastic member.

In the second invention, the first stage comprises an inlet conveying path for conveying the cans, an outlet conveying path, and a can transfer section connecting the inlet conveying path and the outlet conveying path, The second stage is composed of a mold clamping unit equipped with an outer die having a three-dimensional design applied to the inner surface, and the can that has been conveyed through the entrance conveyance path by the conveyance unit is conveyed to the second stage, and after completion of the can body molding. The can is transported from the second stage to the outlet conveyance path, the can body molding means is inserted into the can body clamped in the outer mold by the mold clamping means, and the can is pressed from the inside toward the outer mold. Ri Do from the configuration for deforming the can along a three-dimensional design has been applied to the inner surface, can body molding means, to the body
A first fluid passage is provided, and concave portions are provided above and below the main body.
A wedge-shaped portion is provided along the entire circumference of the inner wall of the concave portion.
The outer periphery is covered with a thin film elastic member, and the thin film elastic member is recessed.
Into the recess, insert the sealing member into the recess, and thin it with the wedge-shaped part.
A membrane elastic member is sealed in the main body and connected to the first fluid passage.
The second fluid passageway provides cans system having a three-dimensional shape, characterized in Rukoto provided on at least one of the sealing member.

In the can body molding system, the second stage includes a support means for supporting the mold clamping means, and the mold clamping means has a three-dimensional design and is divided into two outer molds.
A toggle press mechanism connected to the two divided outer molds for clamping the mold, and a cylinder connected to the toggle press mechanism for clamping the outer mold can be provided.

In the can body molding system, a cylinder is provided corresponding to each of the toggle press mechanisms connected to the two divided outer dies, and the toggle press mechanisms connected to the two divided outer dies are connected to each other. And an interlocking connection member that interlocks and performs an elbow press operation on the outer die.

Further, in the can body molding system,
The second stage may be provided on the first stage.

Further, in the above-mentioned can body molding system, the conveying means receives a can for temporarily stopping the conveyed can on the entrance conveyance path, a can for which the suspension by the stopper has been released, and transfers the can to the entrance conveyance path. To the hand delivery unit, and after completion of the can body molding, to the hand for transporting the can from the can delivery unit to the exit transport path, and to the mold clamping means provided on the second stage for the can carried to the can delivery unit. While transporting,
After completion of the can body molding, the can body can be configured to include a lifter provided in the can delivery section for transporting the can to the can delivery section.

The conveying means includes a guide for positioning the can carried by the hand on the lifter. The guide is attached to the guide cylinder so as to be able to move forward and backward, and the hand conveys the can and reaches the lifter. The hand is attached to the hand cylinder to move forward and backward, and the hand is attached to the hand cylinder so that it can move forward and backward. It is configured to be able to reciprocate between the delivery section and the hand is advanced by the operation of the hand cylinder to receive the can on the entrance transport path, and the advancing state is moved to the can delivery section by the operation of the slide cylinder and moved on the lifter After the can is placed, it can be configured to retreat by the operation of the hand cylinder and return to the can receiving position in the retracted state.

In the can body forming system, the hand is formed to have a V-shaped cross section so that the can can be held, and further, one of the portions extending in the V-shape is provided with the can from the can delivery portion to the exit conveying path. A configuration in which a protruding portion for extruding may be provided.

[0028] In the can body molding system, the lifter is provided on the first mounting table and operable up and down via a connecting member on the first mounting table, and fixing means for mounting and fixing the can on the upper surface. And a cylinder that carries the first and second mounting tables from the can delivery section to the mold clamping means.

[0029]

In the can body molding means, a plurality of first fluid passages are provided extending radially from a center position between the concave portions, and the second fluid passages are connected to the plurality of first fluid passages at the center position. Then, a pump can be connected to the fluid passage to supply the pressurized fluid to the main body to expand the thin film elastic member.

According to a third aspect of the present invention, there is provided a method for producing a can having a three-dimensional shape, wherein the three-dimensional shape is molded on the can body by the can body forming apparatus of the first invention.

According to a fourth aspect of the present invention, there is further provided a method for producing a can having a three-dimensional shape, wherein a three-dimensional shape is formed on a can body by the can body forming system of the second invention.

[0033]

The can body forming apparatus according to the first invention is used by inserting the can into an outer mold having an inner periphery formed into the shape of a can and then inserting the can into the can. Then, from this state, the fluid under a predetermined pressure is supplied to the inside of the thin film elastic member through the fluid passage and the can is pressed from the inside toward the outer mold, so that the can follows the shape of the outer mold. Deformed, and as a result,
A three-dimensional shape can be formed on the can. That is, in the present invention, cans of various shapes can be manufactured depending on the design of the outer mold.

In the above-described apparatus, when the thin film elastic member is expanded, the fluid pressure is used. Therefore, the pressure can be distributed at right angles to the inside of the thin film elastic member and evenly, and the pressure can be distributed. In any direction and at any corner. Therefore, since the thin film elastic member can be faithfully changed in accordance with the shape of the outer die, a fine shape can be clearly applied to the can. Since the thin film elastic member is securely sealed around the device main body by the wedge-shaped portion and the sealing member of the device main body, it does not come off due to fluid pressure.

Further, since the device according to the present invention is inserted into the can, the liquid is fed under pressure, and the can body is pushed out from the inside, the can body surface has a very smooth shape.

Further, since the fluid passage is radially extended, the sectional area of the fluid passage can be increased, and the entire thin film elastic member can be instantaneously expanded.

Further, in the second invention, the first stage provided with the transport path and the second stage provided with the mold clamping means are provided.
A stage, a transporting means for transporting the can from the first stage to the second stage, a transporting means for transporting the can from the second stage to the first stage, and a can body molding means for molding a three-dimensional shape into the can body;
The can can be transported smoothly, and various three-dimensional shapes can be continuously formed on the can body.

Further, in the third and fourth aspects of the invention, the three-dimensional shape is formed on the can body by using the first and second aspects of the invention. Can be.

[0039]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view of the can body molding system of this embodiment. The can body molding system includes a first stage 1 for transporting cans, and a second clamping apparatus 11 provided on the first stage and clamping a can 80 to be molded.
And stage 10.

FIGS. 2A and 2B show the first stage 1
3A and FIG. 3B show plan views of the second stage 10. As explained in detail below,
The can body molding system further positions the hand 20 that transports the can 80 from the first stage 1 to the can delivery section 5 and the can 80 transported to the can delivery section 5 together with the hand 20 on the lifter passage hole 6. It comprises a guide 30 and a lifter 40 that ascends from the lifter passage hole 6 and conveys the can 80 to the mold clamping device 11.

The can body molding system will be further described with reference to FIGS. 2 (a) and 2 (b). The first stage 1 includes an entrance conveyor 2a for transporting the can 80 to the hand 20, an exit conveyor 2b for transporting the can 80 after completion of the can body molding to the next step, and a lifter passage hole 6. The can transfer part 5 for connecting the outlet conveyor 2b, the drive belt 4 connected to the motor 29 for driving the inlet and outlet conveyors 2a and 2b, and the drive belt 4 drives the inlet and outlet conveyors 2a and 2b. And the roller 3 that performs the rotation.

The can 80 is conveyed from the inlet conveyor 2a to the second stage 10 described later, and after the can body is formed, is sent to the outlet conveyor 2b and proceeds to the next step.

The hand 20 is connected to a hand cylinder 21, and the hand cylinder 21 is further connected to the slide cylinder 2.
2 are connected. That is, the hand 20 can be moved forward and backward by the hand cylinder 21, and the entrance conveyor 2 a and the lifter 4 can be moved by the slide cylinder 22.
It is configured so as to be able to reciprocate between the tops. Note that the hand 20
And the hand cylinder 21 move the hand 20 to the exit conveyor 2
It is attached to the slide cylinder 22 in an oblique state toward the direction b.

The hand 20 includes a base 23 and a base 2.
3 comprises a right extending portion 24 provided so as to extend in parallel to the entrance conveyor 2a, and a left extending portion 25 provided obliquely extending from the base portion 23 toward the exit conveyor 2b. In addition, the end portion of the left extending portion 25 has a protruding portion 26 protruding in the direction of the outlet conveyor 2b.

In front of the hand 20, a stopper 28 is provided to temporarily stop the can 80 sent on the entrance conveyor 2a and adjust the timing of delivery to the hand 20.

Returning to FIG. 1, the lifter 40 can move up and down on the first can mounting table 41 via the connecting rod 45 (see FIG. 6) and the can 80 can be directly mounted on the first can mounting table 41. A second can mounting table 42, and first and second can mounting tables 41 and 4
And a lifter cylinder 43 for transporting the can 80 to the second stage 10 by raising and lowering the can 2. The detailed operation of the first and second can mounting tables 41 and 42 will be performed at the time of description of can molding.

Returning to FIG. 2 again, on the first stage 1,
A guide 30 connected to the guide cylinder 31 and capable of moving forward and backward is provided at a position facing the hand 20 around the lifter 40. This guide moves forward when the can 80 is conveyed onto the lifter 40 by the hand 20,
Positioning for placing the can on the lifter 40 together with the hand 20 is performed. The guide 30 is retracted by the operation of the guide cylinder 31 as soon as the positioning is performed.

The operation of the first stage 1, the hand 20, and the stopper 28 shown in FIG. 2 is as follows.

First, the can 80 sent on the entrance conveyor 2a is temporarily stopped by rotating the stopper 28 clockwise. The hand 20 slides on the slide cylinder 22 and reaches the entrance conveyor 2a, and then moves forward by the hand cylinder 21 to be in a state shown by a solid line in FIG. Then, the stopper 28 rotates counterclockwise to send out one of the cans 80 to the hand 20,
Rotate clockwise again to temporarily stop the next can 80.
The hand 20 that has received the can 80 slides on the lifter passage hole 6 provided in the can delivery section 5, that is, on the lifter 40 by the operation of the slide cylinder 22.

The reason why the hand 20 is formed in a V-shaped cross section is to make it easy to grasp the can 80 and to prevent the can 80 from jumping out of the hand 20 during transportation. Then, just before the can 80 is conveyed onto the lifter 40, the guide 30 advances and positions the can 80 together with the hand 20 on the lifter 40, that is, on the lifter passage hole 6. Thereafter, the guide 30 immediately retreats by the operation of the guide cylinder 31, and the hand 20 also retreats by the operation of the hand cylinder 21. At this time, can 80
Is transported to the second stage 10 by the lifter 40 at the same time when the hand 20 and the guide 30 move backward. The hand 20 further slides back to the entrance conveyor 2a by the operation of the slide cylinder 22. In addition, hand 2
0 is formed in a V-shape, so that a gap is formed between the inside of the hand 20 and the can 80 by only slightly retreating, and when the can 80 is lifted by the lifter 40, the can 80 is tightened. The unit does not get caught on the hand 20. That is, since the shape of the hand 20 is V-shaped, the stroke of the hand cylinder 21 for moving the hand 20 forward or backward can be minimized. Furthermore,
The left extending portion 25 of the hand 20 is dimensioned so as not to catch the lifter rod 44. Therefore, if the hand 20 is moved backward by the operation of the hand cylinder 21, the lifter 40 exceeds the height of the hand 20 and the second stage 1.
Even if the hand 20 moves upward, the hand 20 can be returned to the entrance conveyor 2a without the left extension 25 of the hand 20 being caught by the lifter 40 and the lifter rod 44 (see FIG. 1).

As will be described later, the can 80 is formed into a predetermined three-dimensional shape by molding the can body at the second stage 10.
Thereafter, the can 80 is returned to the can delivery section 5 by the lifter 40 again. Then, the hand 20 receives the next can 80 as described above, and conveys a new can 80 onto the lifter passage hole 6. At this time, the left extending portion 25 of the hand 20
The protruding portion 2 protruding in the direction of the exit conveyor 2b
Since the hand 6 is provided, the hand 20 reaches the lifter passage hole 6 and simultaneously pushes out the molded can 80 existing on the lifter passage hole 6 toward the outlet conveyor 2 b by the protrusion 26. Thereby, without providing another means for conveying the molded can 80 to the outlet conveyor 2b,
It is possible to carry the can 80 from the entrance conveyor 2a onto the lifter 40 by using only the hand 20 and onto the exit conveyor 2b with minimum operations.

Next, the configuration and operation of the second stage 10 will be described. FIG. 3 shows a plan view of the second stage 10, FIG. 3 (a) shows a state where the outer mold is opened, and FIG. 3 (b) shows a state where the outer mold is clamped.

The second stage 10 includes a support member 18 (FIG. 1).
(Refer to FIG. 2). The mold clamping device 11 is mounted so as to advance and retreat on the rod 13 and conforms to the outer dies 12a and 12b having a three-dimensional shape formed on the inner surface of the outer die 12a and 12b to be molded into a can body. Outer adapters 19a and 19b, outer holders 15a and 15b for holding outer adapters 19a and 19b, and two outer holders 15a and 15b, respectively;
The first and second toggle press mechanisms 14a and 14b for moving the outer mold holders 15a and 15b forward and backward and securely clamping the mold, and the outer mold 12a and the first and second toggle press mechanisms 14a and 14b via the first and second toggle press mechanisms 14a and 14b. The first and second mold clamping cylinders 16a and 16b for performing the elbow press operation on the 12b and the first and second toggle press mechanisms 14a and 14b are connected to each other, and the respective elbow press operations are performed simultaneously. And a connecting member 17 for interlocking. The center of the outer dies 12a and 12b,
That is, a can body forming apparatus 50 described below is disposed in a portion where the can 80 is clamped (not shown in FIG. 3). Here, the outer dies 12a and 12b are fitted to the outer adapters 19a and 19b, and the outer adapters 19a and 19b are fitted.
The reason why b is fitted to the outer mold holders 15a and 15b is that the outer molds 12a and 12b can be attached regardless of their outer shapes.

The operation of the second stage 10 will be described with reference to FIGS. FIG. 4 is an explanatory diagram of the operation in the second stage 10, and shows a state in which the can body molding device 50 is disposed at the center of the outer dies 12a and 12b as described above.

First, the can 80 placed on the lifter 40
Is lifted by the lifter cylinder 43 toward the center of the outer dies 12a and 12b of the second stage 10 (see FIGS. 4A and 1), and the can body disposed at the center of the outer dies 12a and 12b. The molding device 50 is relatively inserted into the can 80 (FIG. 4B). Then, mold clamping is started.

As shown in FIG. 3A, the first mold clamping cylinder 16a extends the toggle crank in the toggle press mechanism 14a, and advances the outer mold 12a toward the center. The second mold clamping cylinder 16b extends the toggle crank in the toggle press mechanism 14b in a bent state, and advances the outer mold 12b toward the center. By this operation, as shown in FIGS. 3B and 4C,
The can 80 can be clamped. Note that the first and second
Toggle press mechanisms 14a and 14b are used for connecting member 1 for interlocking.
7, the bending and extending operations of the toggle cranks are simultaneously performed even when two mold clamping cylinders are provided. That is, by providing two mold clamping cylinders, the mold clamping force is increased and the mold clamping operation can be performed smoothly, and even if the operation timings of the two cylinders are displaced, the displacement is used for interlocking. It is compensated by the connecting member 17. Furthermore, since the mold clamping operations are performed simultaneously, the respective recoils are canceled, and vibration during the mold clamping operation can be prevented.

Also, once the toggle crank has been extended by the mold clamping cylinders 16a and 16b, it can be surely bent without being bent by the force to push and expand the outer dies 12a and 12b during molding of the can body. Can be clamped. On the other hand, when releasing the mold clamping, the mold can be easily and quickly opened because the bent portion of the toggle crank is merely pulled or pushed in the direction orthogonal to the mold clamping direction.

In the mold clamping state shown in FIGS. 3B and 4C, a three-dimensional shape is formed on the can by the can body molding device 50. The can body molding operation by the can body molding apparatus 50 will be described later in detail. After that, the mold release is released,
The can 80 is lowered to the lifter passage hole 6 by the operation of the lifter 40 (FIG. 4D), and is pushed out to the outlet conveyor 2b by the operation of the hand 20 described above (FIGS. 1 and 2A).

FIG. 5 shows a can body forming apparatus 50.
(A) and (b) are side sectional views, and FIG. 5 (c) is a plan view. This device is a main body, a cylindrical member 51 having a pair of left and right concave portions 52 having an H-shaped cross section, and is provided around the cylindrical member 51. A thin film elastic member 53 pressed against the outer dies 12a and 12b, and first and second cylindrical members 54 and 55 for sealing together with the cylindrical member 51 so that the elastic member 53 does not come off and can maintain airtightness. It is composed of

In the cylindrical member 51, a first fluid passage 57 communicating with the outside is formed inside a partition wall 56 that partitions the concave portion 52, and a wedge-shaped portion 58 is formed all around the inside of the opening of the concave portion 52. I have. The wedge-shaped portion 58 is formed so as to be thicker from the opening of the concave portion 52 toward the bottom, and the thin-film elastic member 53 is pressed by the first and second cylindrical members 54 and 55, and the thick portion is formed. Of the thin film elastic member 53 and the wedge-shaped portion 58
And the first and second cylindrical members 54 and 55 prevent the thin film elastic member 53 from coming off due to water pressure. Note that the wedge-shaped portion 58 is not limited to the above-described configuration.
It is sufficient that at least the ridge on the inner surface of the recess 52 has a larger inner diameter toward the opening of the recess 52.

The thin film elastic member 53 is, for example, 2 mm thick.
It is made of rubber of a certain degree and is covered with the cylindrical member 51 and both ends are folded into the concave portion 52 of the cylindrical member 51. As a result, the cylindrical member 51 is sealed by the wedge-shaped portion 58 and the first and second columnar members 54 and 55.

The first cylindrical member 54 has a shape adapted to the internal shape of the concave portion 52 of the cylindrical member 51. In the center of the first columnar member 54, a concave portion 52 of the cylindrical member 51 is provided.
A second fluid passage 60 communicating with a first fluid passage 57 provided in a partition wall 56 for partitioning the first fluid passage is formed. The second fluid passage 60 is connected to a pump 70 and is supplied with water at a predetermined pressure. Then, the first cylindrical member 5
4 is inserted into one concave portion 52 of the cylindrical member 51, the second fluid passage 60 is connected to the first fluid passage 57, and the thin film elastic member 53 is formed together with the wedge-shaped portion 58 of the cylindrical member 51. It can be sealed around the shape member 51.

The second columnar member 55 is connected to the first columnar member 5.
4 and is inserted into the other concave portion 52 of the cylindrical member 51 to seal the thin film elastic member 53 together with the wedge-shaped portion 58 of the cylindrical member 51.

The first and second cylindrical members 54 and 55
Is a screw 63 from the surface exposed from the cylindrical member 51 to the outside.
Is inserted and fixed at a partition wall 56 that partitions the concave portion 52 of the cylindrical member 51. When the characteristics of the thin film elastic member 53 are deteriorated, the first and second cylindrical members 54,
By removing 55, thin film elastic member 53 can be easily replaced.

The thin film elastic member 53 is sealed by the wedge-shaped portion 58 of the cylindrical member 51 and the first and second cylindrical members 54 and 55 without providing any other means around the cylindrical member 51. It is designed to withstand water pressure for can body molding. This device is usually 30-50k
Although a water pressure of g / cm ² is used, according to the configuration of the present embodiment, it can withstand a water pressure of 80 to 90 kg / cm ² , and the thin film elastic member 53 does not come off the cylindrical member 51. In order to further increase the strength of sealing the thin film elastic member 53, the thin film elastic member 53 may be bonded to the inner periphery of the concave portion 52 of the cylindrical member 51.

Further, a pump 70 connected to the can body forming apparatus 50 includes an air cylinder 71 and a water pump 72, and the air cylinder 71 presses water filled in the water pump 72. Then, water at a predetermined pressure is supplied to the first and second fluid passages 57 and 60,
The thin film elastic member 53 is expanded.

Next, a method of forming a three-dimensional shape on a can using the can body forming apparatus 50 will be described.

First, a three-dimensional shape to be formed on the can body is formed on the inner surfaces of the outer dies 12a and 12b, and the design part 64 is formed. The design portion 64 may have any shape. For example, if a can is formed into a gourd shape, the shape may be applied. In addition, if it is desired to emboss a fruit or rope in a can body, the shape may be applied to the inner surfaces of the outer dies 12a and 12b.

The prepared outer dies 12a and 12b are attached to the above-described mold clamping device 11, and the can 80 is fitted to the outer dies 12a and 12b and the lifter 4
With the rise of 0, the can body forming apparatus 50 is relatively inserted into the can body (see FIGS. 5A and 4A to 4C). Thereafter, water pressurized to, for example, 30 to 50 kg / cm ² is supplied from the pump 70 to the second fluid passage 60, and the water reaches the inside of the thin film elastic member 53 through the first fluid passage 57. . The thin film elastic member 53 expands due to the water pressure, and moves the can 80 from the inside to the outer molds 12a and 1a.
The can 80 is expanded toward the design portion 64 formed in the second portion 2b. (See FIG. 5B).

According to the water pressure, the pressure can be distributed perpendicularly and evenly to the inside of the thin film elastic member 53,
And the pressure extends to any corner in any direction. Further, the thickness of the elastic member 53 of this embodiment is 2 mm.
Therefore, it can be changed to any shape corresponding to the shape of the design portion 64 by water pressure.

Therefore, the can 80 is formed of the thin film elastic member 53.
As a result, the entire inner peripheral surface is uniformly pressed, so that it expands toward the design portion 64, and a three-dimensional shape with a predetermined design is formed on the surface. In FIG. 5, for convenience of explanation,
Although a design portion 64 having a simple shape is shown, the hydraulic feature that the pressure can be uniformly applied in all the directions described above even if a complicated design is formed on the inner surface of the outer dies 12a and 12b. If the can body forming apparatus 50 of this embodiment using the thin film elastic member 53 which can be changed in accordance with any shape can be easily applied to the can 80 up to embossing.

When a three-dimensional shape is formed by molding the can body as in this embodiment, the can expands in the lateral direction.
Height becomes shorter. This situation is shown in FIGS. 6 (a) to 6 (f).

When the height of the can 80 decreases, the lifter 40
If the height of the second mounting table 42 is not adjusted,
And the can cannot be lowered to the can delivery section 5. However, it is difficult to adjust the height of the lifter 40 during the molding of the can because the can 80 to be molded has a different shrinking length depending on its thickness, material, three-dimensional design and the like. Therefore, in the present embodiment, the can 80 is
And a second mounting table 42 provided on the first mounting table 41 via the connecting rod 45 (FIG. 6A). The second mounting table 42 is provided with a magnet and is attracted to the bottom of the can 80. In addition, not only a magnet but also a suction cup or a means for suctioning with vacuum air may be used for this suction.

The can 80 is moved by the lifter 40 to the outer mold 12a.
And 12b to be molded (FIG. 6B).
According to the first and second mounting tables 41 and 42, FIG.
As shown in (c), even when the can 80 expands in the horizontal direction during molding and its height is shortened, the connecting rod 45
The second mounting table 42 can move upward together with the can 80 along, and the can 80 can be continuously mounted. When the can 80 is lowered to the can delivery portion 5 after molding, the outer dies 12a and 12b are opened, and at the same time, the second placing table 42 on which the molded can 80 is placed is placed on the first placing table 41 again. Then, the can 80 can be lowered to the can delivery section 5 by the operation of the lifter cylinder 43 (FIG. 6D). When the bottom of the can 80 arrives at the can delivery portion 5, the lifter 40 descends through the lifter passage hole 6 through which only the lifter 40 smaller than the diameter of the can 80 can pass. 6 (e), the second mounting table 42 is detached from the bottom of the can 80, and only the can 80 is in the can delivery section 5.
It remains on the top (FIG. 6 (f)). At this time, the second mounting table 42
Tries to leave the can 80 in the can delivery section 5, but the second
The enlarged diameter portion 46 provided at the other end of the connecting rod 45 connected to the mounting table 42 is caught on the lower surface of the first mounting table 41,
The mounting table 42 can be pulled down and separated from the can 80 (FIGS. 6E and 6F). Then, can 80 is hand 2
0 is pushed out to the outlet conveyor 2b by the projection 26 (see FIG. 2B).

The configuration and operation of the system according to the present embodiment have been described above. The operation is summarized as shown in the timing charts of FIGS. That is, the operation timing of each member constituting the system of the present embodiment is performed by programmed control means. 7 to 9, the stopper 28 for temporarily stopping the can 80 on the inlet conveyor 2a and the can 80
0, a hand 20 for moving the hand 20, a slide cylinder 22 for sliding the hand 20, a guide 30 for positioning the can 80 on the lifter 40, a lifter 40 for conveying the can 80 to the second stage 10, and a process for applying a three-dimensional shape to the can 80. The operation timing of the pump 70 that supplies the pressurized water to the outer dies 12a and 12b and the can body molding device 50 is shown.

In the system according to the present embodiment, a three-dimensional shape can be formed on the can 80 even if one can 80 or a plurality of cans are supplied intermittently or continuously. .

That is, when the number of the cans 80 is one, the control means detects this and selects the single discharge mode. In this case, as described above, the can 80 is connected to the entrance conveyor 2a.
Stopped on the upper side, placed on the lifter 40 with the hand 20, clamped with the outer dies 12a and 12b, and
The can 80 is given a three-dimensional shape, and the lifter 40 transports the can 80 to the can delivery section 5. Then, when a new can 80 is not supplied, the hand 20 moves onto the lifter 40 again and pushes out the molded can 80 onto the outlet conveyor 2b.
The above is the outline of the operation in the single discharge mode, and the timing is shown in FIG.

Further, when the can 80 is intermittently sent, it can be processed in a single shot mode. The timing is shown in FIG.

When the cans 80 are continuously supplied on the inlet conveyor 2a, the control means detects this and selects the continuous mode. Regarding the timing of this operation,
This is shown in FIG.

FIGS. 10A to 10D show a can 80 having a three-dimensional shape formed by the can body forming system and the can body forming apparatus of this embodiment. These shapes can be easily formed by forming the design portion 64 on the inner surfaces of the outer dies 12a and 12b as described above. Therefore, a variety of can shapes can be obtained for the apple juice can, such as an embossed can shaped like an apple as shown in FIG. 8 (d). It is also possible to express the type of contents. That is, according to the system of the present embodiment, a can having a free shape can be manufactured by the shape of the outer die.

In this embodiment, the thin film elastic member 5
Although the three-dimensional shape was formed on the can 80 by applying only water pressure to the three-dimensional design, the water pressure could be reduced by about 5 kg / cm2 by applying a shaft load to the can 80, and the three-dimensional shape design with severe irregularities It has been confirmed that can be molded. Further, since one of the outer dies 12a and 12b and the other is the elastic member 53 with the can 80 interposed therebetween, the use of can bodies having different plate thicknesses does not affect molding at all. Therefore, the system of the present embodiment can be applied not only to a cylindrical can but also to a three-dimensional shape made of various materials such as a plate. Further, by forming a three-dimensional shape on the can 80, even if the used amount of the material is the same, the internal capacity of the can can be increased, the manufacturing cost can be reduced, and the can can be made non-slip. Although water pressure is used for can body molding, air pressure or hydraulic pressure may be used.

[0083]

As described above, according to the present invention, a can having an unprecedented free shape can be manufactured, and a finely-shaped emboss can be clearly formed on the can body. be able to. Further, cans of all shapes can be manufactured by one apparatus, and safety and workability can be improved with a simple configuration.

Further, a can having a new shape that breaks the conventional concept of a can can be provided on the market.

[Brief description of the drawings]

FIG. 1 is a side view of a can body molding system according to an embodiment of the present invention.

FIGS. 2A and 2B are plan views of a first stage included in a can body forming system according to an embodiment of the present invention.

FIGS. 3A and 3B are plan views of a second stage constituting the can body molding system according to the embodiment of the present invention, wherein FIG. 3A shows a state where an outer mold is opened, and FIG.

4 (a) to 4 (d) are explanatory views showing a state of mold clamping in a second stage shown in FIG. 3. FIG.

FIG. 5 is a cross-sectional view and a plan view of a can body forming apparatus constituting a can body forming system in an embodiment of the present invention, and (a).
Is a sectional view of a state where the device is inserted into the can body, (b)
Is a sectional view of a state where the can body is being molded by the device,
(C) is a plan view of the device.

FIGS. 6 (a) to 6 (f) are explanatory views of the operation of the lifter constituting the can body forming system in the embodiment of the present invention.

FIG. 7 is a timing chart showing the operation timing of each member constituting the can body molding system according to the embodiment of the present invention.

FIG. 8 is a timing chart showing the operation timing of each member constituting the can body molding system in the embodiment of the present invention.

FIG. 9 is a timing chart showing the operation timing of each member constituting the can body molding system in the embodiment of the present invention.

FIGS. 10A to 10D are perspective views showing cans manufactured by the can body forming system according to the embodiment of the present invention.

FIG. 11 (a) is a partial cross-sectional view showing the configuration of a conventional can body forming apparatus, and FIG. 11 (b) is a plan view.

FIGS. 12A and 12B are cross-sectional views showing a configuration of a conventional can body forming apparatus.

FIG. 13 is a cross-sectional view showing a configuration of a conventional can body forming apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st stage 2a Inlet conveyor 2b Outlet conveyor 3 Roller 4 Drive belt 5 Can delivery part 6 Lifter passage hole 10 Second stage 11 Mold clamping device 12a, 12b Outer mold 13 Rod 14a, 14b First and second toggle press mechanism 15a , 15b Outer die holder 16a, 16b First and second die clamping cylinders 17 Interlocking connecting member 18 Support member 19a, 19b Outer die adapter 20 Hand 21 Hand cylinder 22 Slide cylinder 23 Base 24 Right extension 25 Left extension 26 Projection part 28 Stopper 29 Motor 30 Guide 31 Guide cylinder 40 Lifter 41 First can mounting table 42 Second can mounting table 43 Lifter cylinder 44 Lifter rod 45 Connecting rod 46 Large diameter section 50 Can body molding device 51 Cylindrical member 52 Recess 53 Thin film elastic member 4 First cylindrical member 55 Second cylindrical member 56 Partition wall 57 First fluid passage 58 Wedge-shaped portion 59 Corner 60 Second fluid passage 63 Screw 64 Design portion 70 Pump 71 Air cylinder portion 72 Water pump portion 80 Can 90 Shaft 91 Pyramid Member 92 Air vent hole 93 Pressing member 94 Hollow part 95 Elastic member 96 Die 97 Ring-shaped recess 98 Press machine 99 Ram 100 Punch 101 Elastic member 102 Cavity 103 Hydraulic generating cylinder 104 Ring-shaped ridge

Claims (13)

(57) [Claims] 1. After a can is fitted into an outer mold having a three-dimensional design formed on an inner surface, the can is inserted into a can body, the can is pressed from the inside toward the outer mold, and along the inner surface of the outer mold. In the device for deforming the can, a first fluid passage is provided in the device main body, and a concave portion is provided on the upper and lower sides of the device main body, and a wedge-shaped portion is provided around the entire inner wall of the concave portion. The thin film elastic member is covered with an elastic member, and the thin film elastic member is folded into the concave portion, a sealing member is inserted into the concave portion, and the thin film elastic member is sealed together with the wedge-shaped portion in the device main body. A can body forming apparatus, wherein a second fluid passage to be connected is provided in at least one of the sealing members. 2. A plurality of first fluid passages are provided extending radially from a center position between the recesses, and the second fluid passages are connected to the plurality of first fluid passages at the center position. The can body forming apparatus according to claim 1, wherein a pump is connected to the fluid passage, and a fluid under pressure is supplied to the apparatus main body to expand the thin film elastic member. 3. The first stage includes an inlet transport path for transporting the cans, an outlet transport path, and a can delivery section connecting the inlet transport path and the outlet transport path. The second stage has a three-dimensional design. And a mold clamping means having an outer mold attached to the inner surface thereof.The conveying means conveys the can that has been conveyed through the entrance conveyance path to the second stage and, after the can body molding, ends the can. The container is carried from the second stage to the outlet conveyance path, the can body molding means is inserted into the can body clamped in the outer mold by the mold clamping means, and the can is pressed from the inside toward the outer mold. Ri Do from the configuration for deforming said can along a three-dimensional design has been applied to the outer mold inner surface, wherein the can body molding means comprises a first fluid passage in its body,
And, provided with concave portions above and below the main body,
A wedge-shaped portion is provided over the entire inner wall , and the outer periphery of the main body is covered with a thin film elastic member;
An elastic member is folded into the concave portion, a sealing member is inserted into the concave portion, and the thin member is inserted together with the wedge-shaped portion.
A membrane elastic member is sealed in the main body and is in contact with the first fluid passage.
Connecting a second fluid passage to at least one of the sealing members.
Provided cans system having a three-dimensional shape, characterized in Rukoto. 4. The second stage includes a supporting means for supporting the mold clamping means, wherein the mold clamping means has a three-dimensional design, and is divided into two outer molds, and the two divided outer molds are provided. Connected to
4. The molding system for a can having a three-dimensional shape according to claim 3, comprising a toggle press mechanism for clamping the mold, and a cylinder connected to the toggle press mechanism for clamping the outer mold. 5. The cylinder according to claim 1, wherein said cylinder is provided corresponding to each of said toggle press mechanisms connected to said two divided outer molds, and said toggle press mechanism connected to each of said two divided outer molds is connected to each other. The molding system for a can having a three-dimensional shape according to claim 4, further comprising an interlocking connecting member that is connected to perform an elbow press operation on the outer die in an interlocking manner. 6. The molding system for a can having a three-dimensional shape according to claim 3, wherein the second stage is provided on the first stage. 7. The transporting means receives a can for which the transported can is temporarily stopped on an inlet transport path, and the can for which the suspension by the stopper is released, and removes the can from the inlet transport path. A hand that conveys the can to the outlet conveyance path from the can delivery part after the can body molding is completed, and the can that is conveyed to the can delivery part is transferred to the second stage. The three-dimensional shape according to claim 3, comprising a lifter provided in the can delivery part, wherein the lifter is provided to the can delivery part, while being transported to the provided mold clamping means and after completion of the can body molding, the can is transported to the can delivery part. Can molding system. 8. The conveying means further includes a guide for positioning the can carried by the hand on the lifter, the guide being attached to a guide cylinder so as to be able to move forward and backward, and the hand being connected to the can. The can is configured to move forward just before reaching the lifter to position the can on the lifter, and then to immediately retract, the hand is attached to a hand cylinder so as to be able to advance and retreat, and the hand is further configured. A cylinder is attached to a slide cylinder so as to be able to reciprocate between the entrance conveyance path and the can delivery section, and the hand is advanced by the operation of the hand cylinder to receive the can on the entrance conveyance path,
After moving to the can delivery part by the operation of the slide cylinder and placing the can on the lifter in the state of moving forward, it retracts by the operation of the hand cylinder, and returns to the can receiving position in the retracted state. Claim 7 configured to:
A can molding system having the three-dimensional shape described. 9. The hand is formed to have a V-shaped cross section so as to be able to hold the can, and further, the can is transferred from the can delivery portion to the outlet conveyance path at one of the portions extending in the V shape. The molding system for a can having a three-dimensional shape according to claim 7, wherein the system is provided with a protrusion for extruding. 10. The lifter, comprising: a first mounting table, and a fixing means provided on the first mounting table so as to be vertically operable via a connecting member, and having a fixing means for mounting and fixing the can on an upper surface. The molding system for a can having a three-dimensional shape according to claim 7, comprising: two mounting tables; and a cylinder that carries the first and second mounting tables from the can delivery unit to the mold clamping unit. 11. A plurality of first fluid passages are provided extending radially from a center position between the recesses, and the second fluid passages are connected to the plurality of first fluid passages at the center position. 4. The molding system for a can having a three-dimensional shape according to claim 3 , wherein a pump is connected to the fluid passage to supply fluid under pressure to the main body to expand the thin film elastic member. 12. A method for producing a can having a three-dimensional shape, wherein the three-dimensional shape is molded on the can body by the can body molding apparatus according to claim 1. 13. A method for producing a can having a three-dimensional shape, wherein the three-dimensional shape is molded on the can body by the can body molding system according to claim 3.