Can manufacturing device

Abstract

To provide a can manufacturing device that has an air supply pipe structure capable of simplifying piping for supplying compressed air to a plant.SOLUTION: The can manufacturing device in which processing units are linked is characterized by having two air supply pipes that extend in parallel across the plurality of processing units. Therein: air is supplied to one end of each of the two air supply pipes, the one ends being on the same side; the other ends of the two air supply pipes are connected; the two air supply pipes form a loop; and at least one of the air supply pipes has branch pipes for supplying air from the air supply pipe to each processing unit.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a can making apparatus, and more particularly to a can making apparatus that uses air. [Background technology]

[0002] Conventionally, the can body forming process in the can manufacturing process involves drawing and / or drawing and ironing using a press, trimming the edges of the can opening with a trimmer, drawing (necking) to gradually reduce the diameter of the opening, and flanging to form a flange for tightening the can lid (Patent Document 1). The necking and flanging are performed by a necker flanger machine 1. Since the necking process is performed by multiple processes to form the desired shape, the necker flanger machine 1 is a long plant in which multiple necking processing units 2, flanging processing units 3, etc. are connected (see Figures 3(a) and (b)). Then, the opening of the can body is gradually drawn by a plurality of necking units 2 to form the shape of the neck (see FIG. 3(c)).

[0003] During necking, the necking tool (insert IS and centering CL) slides with the rotation of the main turret due to the cam on the trim side (opening side) and the cam on the bottom side of the can body C, and the necking process is performed while the bottom chuck BC adsorbs the bottom of the can body C. During this necking process, compressed air is blown into the can body to pressurize it and prevent buckling and deformation. (See Figure 4) [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2022-546245 Summary of the Invention [Problem to be solved by the invention]

[0005] 5, a single internal air supply pipe 4 is installed from the front side (can loading side) F to the rear side (can unloading side) R of the plant as piping (air supply pipe) for supplying compressed air to each necking processing unit 2, and branch air supply pipes 5 for supplying compressed air to each necking processing unit 2 are connected from this internal air supply pipe 4. In order to supply compressed air evenly to each of the necking processing units 2 connected in multiple units to a long plant, a front side air connection port 41f and a rear side air connection port 41r for supplying compressed air are provided at two locations, the front side F and the rear side R of the single internal air supply pipe 4, respectively, to supply compressed air from outside the plant. Further, compressed air is supplied to each of the front air connection port 41f and the rear air connection port 41r from an air supply pipe 6 installed in a building that houses the plant. In this piping structure, air connection ports are provided at both ends of the long plant, so it is necessary to install an indoor air supply pipe 6 inside the building to supply compressed air to these two air connection ports located at a distance, which poses the problem of high costs for installing and maintaining the indoor air supply pipe 6.

[0006] An object of the present invention is to provide a can making apparatus having an air supply pipe structure that can simplify the piping for supplying compressed air to a plant. [Means for solving the problem]

[0007] In order to solve the above problems, a can making apparatus of the present invention has the following configuration. A can making apparatus to which a processing unit is connected, Two air supply pipes extending in parallel across the processing units are provided, Air is supplied to one end of the two air supply pipes on the same side, The other ends of the two air intake pipes are connected to each other, and the two air intake pipes form a loop, At least one of the air supply pipes has a branch pipe for supplying air from the air supply pipe to each of the processing units. A can making apparatus characterized by: Effect of the Invention

[0008] By installing two air supply pipes that form a loop, the present invention allows two air connection ports to be placed close to each other, simplifying the piping structure within the building that houses the plant. [Brief description of the drawings]

[0009] [Figure 1] 1A and 1B are diagrams illustrating the installation structure of an internal air supply pipe 4 of a Necker flanger machine 1 according to an embodiment of the present invention, where (a) is a plan view and (b) is a perspective view. [Diagram 2] FIG. 2 is a diagram illustrating an installation structure of an internal air supply pipe 4 of a Necker flanger machine 1 which is a modified example of the present invention. [Diagram 3] 1A is a schematic diagram of a conventional necker flanger machine 1, in which (a) is a plan view, (b) is a perspective view, and (c) is a diagram illustrating the processing steps of necking. [Figure 4] FIG. 2 is a schematic diagram of the necking process, where (a) shows the state before the process and (b) shows the state during the process. [Diagram 5] 1A and 1B are diagrams for explaining the installation structure of an internal air supply pipe 4 of a conventional Necker flanger machine 1, where (a) is a plan view and (b) is a perspective view. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the same reference numerals in different drawings indicate parts having the same function, and duplicated descriptions in each drawing will be omitted as appropriate.

[0011] [Embodiment] Hereinafter, a description will be given of a can making device using air, taking a Necker flanger machine 1 as an example. Note that the can making device using air is not limited to a Necker flanger machine, and may be a body maker, trimmer, etc. Also, it may be a Necker machine without a flanger.

[0012] [Overall configuration] FIG. 1 is a diagram illustrating the installation structure of an internal air supply pipe 4 of a Necker flanger machine 1 according to an embodiment of the present invention, in which the machine main bodies of each unit are omitted and only the machine base 11 and the internal air supply pipe 4 are shown. The Necker flanger machine 1 of this embodiment is similar to the conventional Necker flanger machine 1 shown in FIG. The can body before processing is carried in at the front side (can carrying-in side) F of the necker flanger machine 1 and is transported to the first necking processing unit 21. The first stage of processing is carried out in the first necking processing unit 21. Then, the second stage of processing is carried out in the second necking processing unit 22, and then processing is carried out in each necking processing unit 2 (necking device) in sequence, and the final stage of processing is carried out in the last necking processing unit 2n. After the necking process is completed, the flanging process is carried out in the flanging unit 3. After the flanging is completed, the results of the necking and flanging may be inspected by an inspection unit connected to the necker flanger machine 1. Once all processes are completed, the machined can body is removed from the rear side (the side where the can is removed) R.

[0013] [In-flight air supply pipe] As shown in FIG. 1, the internal air supply pipe 4 has two internal air supply pipes 4a and 4b (air supply pipes) arranged along the longitudinal direction of the long Necker flanger machine 1. The two internal air supply pipes 4a, 4b are arranged in each necking processing unit 2 so as to extend in parallel from the front side F to the rear side R across the multiple necking processing units 2. The ends (one end on the same side) on the front side F of the two interior air supply pipes 4a, 4b are provided with air connection ports 41a, 41b for receiving air supply from an interior air supply pipe 6. Further, the ends (other ends) on the rear side R of the two interior air supply pipes 4a, 4b are connected by a connecting pipe 42 to form a loop. With this configuration, the two interior air supply pipes 4a, 4b function as a single air supply pipe having air connection ports 41a, 41b at both ends.

[0014] A branch air supply pipe 5 (branch pipe) for supplying air to each necking processing unit 2 is connected to each of the two internal air supply pipes 4a, 4b. In this embodiment, the branch air supply pipe 5 is connected to the two internal air supply pipes 4a, 4b so that air is alternately supplied to each of the connected necking processing units 2. That is, the branch air supply pipe 5 is connected to the internal air supply pipes 4a and 4b so that air is alternately supplied to every other necking processing unit 2, such that air is supplied from the internal air supply pipe 4a to the first necking processing unit 21 and from the internal air supply pipe 4b to the second necking processing unit 22, and thereafter, alternately, from the internal air supply pipe 4a to the odd-numbered necking processing units 2 and from the internal air supply pipe 4b to the even-numbered necking processing units 2.

[0015] The air supplied to the internal air supply pipe 4 is discharged to the outside after being used in each necking processing unit 2. Therefore, the air in the internal air supply pipe 4 is constantly being consumed. In this embodiment, in which air is supplied to all of the necking processing units 2 through two internal air supply pipes 4a, 4b, the capacity of the internal air supply pipe 4 is larger and the air flow rate per internal air supply pipe is reduced compared to the conventional structure in which air is supplied from both ends of a single internal air supply pipe 4 shown in Figure 5(a), and air is supplied to all of the necking processing units 2 through a single internal air supply pipe 4. As a result, fluctuations in the air pressure and flow rate in the internal air supply pipe 4 can be reduced. In addition, since the two internal air supply pipes 4a, 4b each supply air to half of all the necking processing units 2, the two internal air supply pipes 4a, 4b can be used evenly to supply air to each necking processing unit 2. That is, in this embodiment, the pressure and amount of air supplied to each necking processing unit 2 can be made more uniform.

[0016] [Variation 1] 2(a) is a diagram for explaining the installation structure of the internal air supply pipe 4 of the Necker flanger machine 1 according to the first modified example of the present invention. Note that the flange processing unit 3 is omitted in this drawing. In the above embodiment, every other branch air supply pipe 5 for supplying air to the plurality of connected necking processing units 2 is configured to be connected to two internal air supply pipes 4a, 4b, but this is not limited thereto, and as shown in Fig. 2(a), the branch air supply pipe 5 for supplying air to half of the necking processing units 2 on the front side F of the plurality of connected necking processing units 2 may be connected to one internal air supply pipe 4a, and the branch air supply pipe 5 for supplying air to the remaining necking processing units 2 on the rear side R may be connected to the other internal air supply pipe 4b. In this modification 1, as in the above embodiment, air can be supplied evenly to each necking processing unit 2 using two internal air supply pipes 4a, 4b, and the pressure and amount of air supplied to each necking processing unit 2 can be made uniform.

[0017] [Variation 2] 2(b) is a diagram for explaining the installation structure of the internal air supply pipe 4 of the Necker flanger machine 1 according to the second modified example of the present invention. Note that the flange processing unit 3 is omitted in this drawing. In the above-mentioned embodiment and modified example 1, both of the two internal air supply pipes 4a and 4b are used to supply air to all of the necking processing units 2, but all of the branch air supply pipes 5 may be connected to only one internal air supply pipe 4a so that air is supplied to all of the necking processing units 2 from one internal air supply pipe 4a. In this modified example, since the branch air supply pipe 5 is connected to only one internal air supply pipe 4a, it is only necessary to provide a structure for connecting the branch air supply pipe 5 to only the internal air supply pipe 4a, and since the branch air supply pipe 5 is not connected to the other internal air supply pipe 4b, a simple pipe without a connection structure can be used. In addition, since the internal air supply pipe 4b does not supply air to the necking processing units 2, it is not necessary to place it in close proximity to the internal air supply pipe 4a, and the two internal air supply pipes 4a and 4b may be installed apart from each other, which increases the degree of freedom in the placement of the internal air supply pipes 4a and 4b.

[0018] [Variation 3] In the above-described embodiment, variant 1 and variant 2, the internal air supply pipes 4a, 4b are each a single pipe extending from the front side F to the rear side R, but this is not limited thereto, and at least one of the internal air supply pipes 4a, 4b may be formed by connecting multiple pipes which are divided for each necking processing unit. That is, at least one of the internal air supply pipes 4a, 4b may be formed by connecting internal air supply split pipes corresponding to the respective necking units 2 in the number equal to the number of the necking units 2. For example, in the above-described embodiment, two types of in-machine air intake split pipes are prepared: one unit of in-machine air intake split pipe having a structure for connecting a branch air intake pipe 5, and one unit of in-machine air intake split pipe not having a structure for connecting a branch air intake pipe 5, and these are connected alternately to form the in-machine air intake pipes 4a, 4b. In the above-mentioned modified examples 1 and 2, too, these two types of interior air supply division pipes may be connected in accordance with the arrangement of the branch air supply pipe 5 to form the interior air supply pipes 4a, 4b.

[0019] The number of connected necking processing units 2 in the necker flanger machine 1 varies depending on the type of cans to be manufactured, and in the embodiment, variant 1 and variant 2, it is necessary to prepare internal air supply pipes 4a, 4b with a length that matches the number of connected necking processing units 2. However, in variant 3, it is possible to configure internal air supply pipes 4a, 4b with a length that matches the number of connected necking processing units 2 simply by changing the number of internal air supply division pipes to be connected.

[0020] Furthermore, the in-machine air intake split pipe is not limited to one corresponding to each necking processing unit 2, but may be one corresponding to a plurality of necking processing units 2. Such an in-machine air intake split pipe corresponding to a plurality of necking processing units 2 can reduce the man-hours required for connecting the in-machine air intake split pipes, and also contributes to reducing the possibility of air leakage from the connection between the two in-machine air intake split pipes and reducing the maintenance work for the connection. For example, there may be mentioned two units of in-machine air intake split pipes, each having one portion having a structure for connecting the branch air intake pipe 5 and one portion not having a structure for connecting the branch air intake pipe 5, two units of in-machine air intake split pipes, each having two portions having a structure for connecting the branch air intake pipe 5, and two units of in-machine air intake split pipes, each having two portions not having a structure for connecting the branch air intake pipe 5. In addition to these two units of in-machine air intake split pipes, three or more units of in-machine air intake split pipes may be prepared, but preparing too many types of in-machine air intake split pipes is disadvantageous in terms of costs, so it is preferable to prepare the air intake split pipes taking various circumstances into consideration.

[0021] [Air supply pipe inside building] As shown in Fig. 1(b), only one air supply pipe 6 inside the building is installed, which is located on the front side F of the Necker Flanger machine 1. By simply connecting two air connection ports 41a, 41b arranged side by side to this single air supply pipe 6 inside the building, air can be supplied to the inside air supply pipes 4a, 4b. It is clear that the piping is simpler than the conventional air supply pipe 6 inside the building shown in FIG. 5(b).

[0022] The embodiment, variant 1, variant 2 and variant 3 of the present invention have been described in detail above with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the present invention also includes design changes and the like that do not deviate from the gist of the present invention. Furthermore, the above-described embodiment and each of the modified examples can be combined by utilizing each other's technologies, so long as there are no particular contradictions or problems in the purpose, configuration, and the like. [Explanation of symbols]

[0023] 1. Necker flanger machine 11 Machine Base 2. Necking processing unit 3 Flange processing unit 4, 4a, 4b In-flight air intake pipe 41a, 41b Air connection port 41f Front air connection port 41r Rear air connection port 42 Connecting pipe 5 Branch air supply pipe 6. Air supply pipe inside building C Can body BC Bottom Chuck CL Centering IS Insert F Front side R Rear side

Claims

1. A can making apparatus to which a processing unit is connected, Two air supply pipes extending in parallel across the plurality of processing units are provided, Air is supplied to one end of the two air supply pipes on the same side, The other ends of the two air intake pipes are connected to each other, and the two air intake pipes form a loop, At least one of the air supply pipes has a branch pipe for supplying air from the air supply pipe to each of the processing units. A can making apparatus characterized by:

2. 2. A can manufacturing apparatus according to claim 1, wherein the two air supply pipes have the branch pipe.

3. Each of the two air supply pipes has a branch pipe for supplying air to every other one of the processing units, 2. The can manufacturing apparatus according to claim 1, wherein air is alternately supplied to said processing units through said branch pipes of said two air supply pipes.

4. 2. A can manufacturing apparatus according to claim 1, wherein only one of said air supply pipes has said branch pipe.

5. 2. The can manufacturing apparatus according to claim 1, wherein the air supply pipe is disposed within the processing unit.

6. 2. The can manufacturing apparatus according to claim 1, wherein the air supply pipe is divided for each of the processing units.

7. 7. The can making apparatus according to claim 1, wherein the processing unit is a necking device.

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