JPS6188927A - Production of compound can - Google Patents

Abstract

PURPOSE:To eliminate the bad effect caused by the overlapping condition of the seaming part each other of a can by locating the outer periphery of the winding part of the compound can consisting of the cylindrical drum made of a composite material and the cover made of metal on the concentric and about same circle with the outer periphery of the drum or to the inner part than that. CONSTITUTION:The metallic cover 4 providing a curl shaped flange 9 is covered on the opening part of the cylindrical drum 2 made of a composite material providing a flange 7 and the flanges 7, 9 are enfolded and crushed with the use of the chuck 12 fitted into the recessed hollow part 3 and a seaming roll 15. In this case the seaming is performed with making the outer diameter of the effective action part 17 of seaming the flange wall of the outer peripheral face of the chuck 12 approx. equivalent to the length reducing two times length of the seaming thickness T from the outer diameter of the drum 2 or less than that. The outer periphery of the seaming part 6 is therefore made to be located on the concentric and approx. same circle with the outer periphery of the drum 2 or to the inner part than the drum 2. The bad effect caused by the overlapping condition of the seaming part each other of the compound can be thus eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a composite can, particularly a composite can consisting of a cylindrical body made of a composite material mainly made of paper, and a metal top lid and bottom lid each having a recessed part. Concerning the manufacturing method.

Prior art and its problemsAs shown in Figure 4, the conventional composite can 1'! The construction method is such that, as a chuck (30), the outer diameter of the effective tightening action part (31) of the flange wall on the outer peripheral surface is from the inner diameter of the body (32) to the circumferential wall (34) of the concave part (34) of the lid (33). 35) It is carried out using a material whose length is equal to the length obtained by subtracting twice the length of the thickness.

And this chuck (30) and the seaming roll (36)
The flange (37) of the l1ii (32) and the flange (38) of the lid (33) are rolled together and crushed by tightening using the screws. However, as shown in FIG. 5, the composite can (40) manufactured by the conventional method has a seam part (
39) protrudes outside the outer periphery of the shell (32), and as a result, the seaming portions (39) of the plurality of cans (40) overlap vertically, causing the following problems. That is, the lower seaming part (39) is connected to the upper seaming part (
If the surface printing part of the body (<32) of the can (40) having a can (39) is rubbed (applied with a tool or the body (32) is strongly pressed), as shown by the dashed line in the same figure, It may create a dent or even break 114 (32).Also, if the lower seaming part (39) pushes up the upper seaming part (39) due to impact 7, 2 in the same figure. As shown by the dashed dotted line, the detail (39) is deformed and loosened, impairing the sealing performance.

Metal cans also have the same problem as above, and in order to eliminate this problem, it is known that the body is formed into a barrel shape. However, in the case of composite cans, since the body is formed using paper as the upper body, it is impossible to mold them like metal cans, and the above-mentioned problem has remained unsolved.

An object of the present invention is to provide a 1J manufacturing method for composite cans that solves the above problems.

Means for Solving the Problems The method for manufacturing a composite can of the present invention is to produce a composite can consisting of a cylindrical body made of a composite material mainly made of paper, a metal top lid and a bottom lid having a concave portion, by rJA. In manufacturing, flanges are provided on the periphery of the opening at both ends of the can body, a curled flange is provided on the periphery of the can lid, a tightening roll and a chuck are prepared, and the flange wall on the outer peripheral surface of the can is tightened as a chuck. Use a device whose effective working part has an outer diameter that is approximately equal to or smaller than the outer diameter of the body minus twice the seaming thickness, and first, remove either the top cover or the bottom cover. When placing one of the lids over the opening at one end of the body, align the centers of both lids, fit the chuck into the concave part, and tighten the lid with the tightening roll and chuck to secure the flange of the body. The flange of the lid is rolled up and crushed together, and then the other lid is placed over the other end of the body and seamed in the same way as above, so that the outer periphery of the seamed part is concentric with the outer periphery of the body and approximately on the same circle. The main purpose of this is to make it exist in the inner part of the world.

Composite material boxes generally have a core layer of strong cardboard, an inner layer of synthetic resin-coated paper such as polyethylene, aluminum foil, etc., and an outer layer of printed high-quality paper, aluminum foil, etc. It is not limited to such things.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 shows a composite can made by the method of the invention. This composite can (1) is equipped with a composite tJ cylinder II) ii (2) mainly made of paper and a concave portion (3), and has an INi
It consists of a top cover (4) and a bottom cover (not shown) made of Konku which close the openings at both ends of the M (4).
The outer diameter of the torso (2) is smaller than the inner diameter of the torso (2), and the outer periphery of the seamed part (6) of the torso (2) and winter clothing (4) is concentric with the outer periphery of the torso (2) and on the same circle. It is something that is made to exist.

The above composite color (1) is manufactured by a double seaming method. In manufacturing the composite color (1), outwardly flared flanges (7) are provided at the upper and lower ends of the body (2), as shown in FIG. A flange (9) having a curl (10) whose tip is directed toward the peripheral wall (8) of the concave portion (3) is provided on the peripheral edge of the lid.

The peripheral wall (8) of the concave portion (3) has an upper large diameter portion (8a) that is in close contact with the inner peripheral surface of the body (2), and is connected to the upper large diameter portion (8a) via a stepped portion (8G). It consists of a lower small diameter part (8b). The lower end of the lower small diameter portion (8b) is connected to the bottom wall (3) of the concave portion (3).
11〉.

The effective seaming action portion (17 ) is equal to the length obtained by subtracting twice the seaming thickness T) of the seaming portion (6) from the outside diameter of ff4 (2).

Further, the outer diameter of the lower end of the outer peripheral surface of the chuck (12) is equal to the inner diameter of the lower small diameter portion (8b) of the peripheral wall (8) of the recessed portion (3).

Then, a sealant (not shown) is applied to the part of the lid (4) that is in contact with the inner surface of the flange (9), and the lid (4) is
Cover the opening at one end of the body (2) and align the centers of both. Initially, the peripheral wall of the concave part of the lid (4) in the opening (
8) A gap exists between the lower small diameter portion (8b) and the body (2). In this state, attach the chuck (12) to the lid (4).
into the concave part (3), and bring the bottom surface into close contact with the bottom wall (11), and connect the lower end of the circumferential surface to the lower small diameter part (8b).
Close to the inner surface. Then, while rotating the chuck (12), the first seaming roll (13) is rotated and moved toward the chuck (12) to apply pressure to the curl (10) of the lid (4). Roll the flange (9) under the flange (7) of the body (2>.Next, while rotating the second tightening roll (15), approach the chuck (12>) and roll the first tightening roll ( 13)
The flange (7) of the 1st barrel (2) and lid (4) rolled in
Tighten (9) to the second roll (15)! Sealing is completed by compressing and filling the space between 1i (16) and the effective seaming action portion 17) of the flange wall of the tip (12). During the seaming operation, the chuck (12) is urged downward, so the stepped portion (8C) is stretched out and the recessed portion (4)
The entire peripheral wall (8) of the chuck (12) comes to be along the peripheral surface of the chuck (12). Next, put another lid on the other end of the body (2) and tighten it in the same way as above, so that the outer periphery of the tightened part (6)
(2> Exist in F(d-circular shape) concentrically with the outer circumference.

FIG. 3 shows a modification of the lid used in the method of the invention. The recess (2) of the lid (20) shown in FIG.
The peripheral wall (22) of 1) has an upper large diameter part (22a) that is in close contact with the upper end of the inner peripheral surface of the body (2), and a lower end of the upper large diameter part (22a) that is inclined inwardly toward the bottom. Tapered part (22c)
It consists of a lower small diameter portion (22b) that is continuous through the lower diameter portion (22b).

The lower end of the circumferential surface of the chuck (12) is brought into close contact with the lower end of the inner circumferential surface of the lower small diameter portion (22b).

In the above embodiment, the lower end of the peripheral surface of the chuck (12>) is in contact with the lower end of the inner peripheral surface of the peripheral wall (8) (22>) of the recess (3) (21>) of the lid (4) (20). As a result, it is possible to easily and reliably prevent the lids (4) and (20) from shifting during the seaming operation, but it is not necessary to do so.

Effects of the Invention According to the method for manufacturing a composite can of the present invention, the outer diameter of the effective seaming area of the flange wall on the outer peripheral surface of the chuck used for seaming is equal to twice the seaming thickness from the outer diameter of the body. It is approximately equal to or smaller than the length of , so
The outer periphery of the seamed portion formed by the seaming is concentric with the outer periphery of the shell, and the hook 1C can be located inward from the outer periphery of the shell. Therefore, it is possible to easily obtain a composite can that can eliminate various problems caused by soiling as a result of the upper and lower seam portions overlapping.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing the final stage of the method for manufacturing a composite can of the present invention, and FIG. 2 is a partially cutaway front view showing the process of manufacturing a composite can of the present invention. 3 is a view corresponding to FIG. 2 showing a modified example of the lid used in the method of the present invention, and FIG. 4 is a partially cutaway front view showing the final stage of the conventional method for manufacturing a composite can. FIG. 5 is a partially cutaway front view of two composite cans showing problems with composite cans manufactured by conventional methods. (1)...Composite can, (2)...Cylindrical body made of composite material, 3)...Concave portion, (4)...Metal lid, (6)...
・Tightening part, (7)...Flange, (9)...7 lunge, (10)...Curl, (12)...Chuck, (13)(15>...Tightening roll , (17)...
・Effective outer circumference for seaming, (T)... seaming thickness. 4 people other than the above Figure 4 (> Inu 1 Figure 4)

Claims (1)

[Claims] In manufacturing a composite can consisting of a cylindrical body made of a composite material mainly made of paper, and a metal top cover and bottom cover with a recessed part, flanges are provided around the openings at both ends of the body, and
A curled flange is provided on the periphery of each lid, and a seaming roll and a chuck are provided. First, use a length that is approximately equal to or smaller than the length obtained by subtracting twice the length of
Place either the top cover or the bottom cover over the opening at one end of the body, align the centers of the two, fit the chuck into the recess, and tighten the winding with the winding roll and chuck to complete the body. The flange of the lid and the flange of the lid are rolled together and pressed together, and then the other lid is placed over the other end of the body and tightened in the same manner as above, so that the outer periphery of the seamed part is concentric with the outer periphery of the body. A method for producing a composite can, characterized in that the cans are made to exist on the same circle or inwardly from the same circle.