JPS6355990B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a can body repair coating apparatus.

Conventionally, aluminum materials, tin-plated steel plates, and tain-free steel are used as lids for beverage cans and food cans, but in particular, tin-plated steel plates, tain-free steel, etc. are used as lid materials, or lids with scores on the outer surface of the lids are used. ,
For easy oven lids with tabs etc.
The outer surface of the lid is susceptible to corrosion, so when manufacturing a can body using such a lid, as shown in Fig. A lid is formed in a lid machine a, and then in a repair painting process b, a repair coating is applied to the outer surface of the lid supplied from the lid making machine a, and then the paint is dried and cured in an oven c to form a lid with an outer surface repair coating. This is then wrapped around one end of the can body in the can making step d to form the can body, and the inner surface of the can is repaired in the normal can inner surface repair painting step e, and this is dried and cured in an oven f. The treatment resulted in a can body whose inner surface and outer surface of the lid were repainted.

In such a conventional method, a lid whose outer surface has been repaired in advance is used, but the outer surface of the lid is repaired in the repair painting process b in the post-process of the normal lid making machine as described above. After painting the lid, it is necessary to dry and harden it through an oven C, which requires equipment and auxiliary equipment and space for repair painting on the outside of the lid, making the equipment larger and especially difficult to dry. The curing process takes a long time, so productivity is low in manufacturing cans with internal coatings.
There is a problem in that the supply of externally repaired painted lids cannot keep up with the production of can bodies supplied from the can body production process g, and as a result, the productivity of repaired painted cans in which the inner and outer surfaces of the can bodies are repaired is lowered.

Therefore, as a can repair coating device, for example,
As disclosed in Japanese Unexamined Patent Publication No. 54-94535, there is a rotary roll that rotates a can body with a can lid secured to one end of the can body in a fixed position, and a can body that is driven and rotated by the roll. It consists of an interior coating machine equipped with a coating gun that faces the interior surface.

However, such a device is accompanied by the above-mentioned disadvantages, and the present invention aims to provide a device free of such disadvantages. A can body repair coating device comprising a rotating roll that rotates a can body in a fixed position, and an interior coating machine equipped with a coating gun that faces the inner surface of the can body that is driven and rotated by the rotating roll, the interior coating machine and Separately, an exterior paint machine is provided with a paint gun that faces the outside of the can that is driven and rotated by the rotating roll, and the exterior paint machine includes a chamber that surrounds the paint gun and connects it to an exhaust system, and a chamber that surrounds the paint gun and connects it to an exhaust system. A regulating frame is provided on the front surface of the can lid and facing the outer surface of the can lid.

An example of implementing the present invention will be explained with reference to the attached drawings.
In Fig. 1, reference numeral 1 indicates a seaming device for tightening the can lid and can body supplied from the lid making machine 2 and the can body forming machine 3, respectively, 4 is a repair coating station, and 5 is the coating station 4. The oven for drying and curing the painted can body C is shown, except for the can body repair coating station 4, which is not particularly different from the oven commonly used in the past. Paint place 4
As shown in FIG. 2, there is a roll 6 that is driven and rotated in conjunction with an external drive device, a turret 7 that supplies the can C onto the roll 6, and a turret 7 that appears and retracts from the inner surface of the can C that is rotationally driven on the roll 6. Possible painting gun 8
The paint collection and exhaust mechanism 10 is provided around the outer periphery of the paint gun 9a. It also has a chamber 11 that is connected to the paint gun 9a, and controls the spread, width, and other shapes of the paint that will be discharged in front of the paint gun 9a, and uniformizes the thickness of the paint film on the painted area on the outer surface of the can lid, thereby increasing the repair effect and painting. It is provided with a ring-shaped regulating frame 12 that has the effect of preventing paint from adhering to areas other than necessary. The regulating frame 12 is constructed by bending the front edge of the chamber 11 as shown in FIG. In this case, a removable annular auxiliary regulation frame 1 is provided in front of it.
By stacking the auxiliary regulating frames 12a, they can be replaced as appropriate when they become dirty with paint, and furthermore, by using auxiliary regulating frames 12a of different sizes, frames, and shapes, the regulating width can be changed.

The one shown in FIG. 4 has a double wall structure in which an auxiliary chamber 11a is placed along the inside of the chamber 11, and the front edge of the auxiliary chamber 11a is a regulating frame 12. A passage 1 communicating with the paint recovery and exhaust device 10 between the outside of the auxiliary chamber 11a and the outside of the auxiliary chamber 11a.
3 was formed to allow good recovery and exhaust of the paint.

The one shown in FIG. 5 has an auxiliary chamber 11a whose tip protrudes from the front edge of the chamber 11, and an annular ring 14 that is removably provided around the outer circumference of the auxiliary chamber 11a so as to surround the protrusion 11b. If the auxiliary ventilation passage 13a is formed between the auxiliary chamber 14a and the auxiliary chamber 11a, when paint that bounces off the outer surface of the lid attaches to the auxiliary ventilation passage 13a, the ventilation passage 13 can be removed by simply replacing the annular ring 14 as appropriate.
A can always be kept clean. In the drawings, reference numeral 15 denotes a through hole that communicates the ventilation path 13 provided in the auxiliary chamber 11a with the inside of the auxiliary chamber 11a.

In the embodiment described above, the collection and exhaust mechanism 10 are carried out through the same collection and exhaust port, but if desired, the collection mechanism and the exhaust mechanism may be provided separately without hindering the object of the present invention.

Next, the operation of this device will be explained.

A can body C, in which a can lid B is seamed to one end of a can body A, is fed onto a drive roll 6 by a turret 7 which rotates intermittently. Next, the supply of the can body C onto the drive roll 6 is electrically detected, and the coating gun 8a of the coating station 8 is caused to enter the can body C. Next, when the intrusion of the coating gun 8a is electrically confirmed, paint is ejected from both coating guns 8a and 9a to coat the rotating can body C. At this time, the coating gun 8a that coats the inner surface of the can body C can be used by changing the nozzle direction, shape, etc. at its tip, or by using multiple coating guns as necessary, to coat only the inner surface of the lid of the can body C or the can. It is possible to coat only the inner surface of the barrel or even the entire inner surface of the can. On the other hand, the paint from the paint gun 9a facing the outer surface of the lid is regulated by a regulating frame 12, applied to the portions of the outer surface of the lid that require painting, and excess paint is collected into the exhaust device 10 side. Therefore, there is no inconvenience such as paint adhering to areas other than the outer surface of the lid and staining the outer surface of the can body C or staining the transportation guide chute and the like.

The cans C, which have been coated by the repair coating device 4 in usually less than 1 second per can, are supplied to the oven 5 where the paint is dried and hardened to become a product. In this way, according to the present invention, the rotating roll 6 rotates the can body A with the can lid secured to one end in a fixed position.
and an inner surface coating machine 8 equipped with a coating gun 8a facing the inner surface of the can body A which is driven and rotated on the rotating roll 6. Therefore, since the apparatus is equipped with an external coating machine 9 equipped with a coating gun 9a that faces the external surface of the can body A which is driven and rotated, it is possible to omit a series of apparatuses that perform a separate repair painting process on the can lid as in conventional apparatuses. The whole can be made smaller and more efficient, and the exterior coating machine 9 has a chamber 11 that surrounds the coating gun 9a and connects to the exhaust device 10, and a chamber 11 that is located in front of the chamber 11 and faces the outer surface of the can lid. Since the control frame 12 is provided, there is no inconvenience such as paint adhering to the outer peripheral surface of the can body or other unnecessary parts and staining it or staining the transport guide chute of the can body, etc. When painting with the paint gun 9a, the film tends to be thicker at the periphery than at the center.
By regulating or shielding a part of the peripheral edge with the regulating frame 12, it is possible to prevent such a thick film from being formed and to achieve a uniform coating thickness.

[Brief explanation of the drawing]

In the drawings, Fig. 1 is a system diagram of the present invention, Fig. 2 is a side view of the painting station, Fig. 3 is a sectional view taken along the line, and Figs. 4 and 5 are sectional views showing modifications thereof. , FIG. 6 is a system diagram of a conventional example. 1... Sealing device, 4... Coating station, 5... Oven, 6... Rotating device, 8a, 9a... Coating gun, 8, 9... Painting machine, 10... Exhaust device, 12
...Regulatory framework.

Claims (1)

[Claims] 1. A rotating roll that rotates a can body with a can lid secured to one end of the can body in a fixed position, and an interior coating machine equipped with a coating gun that faces the inner surface of the can body that is driven and rotated by the rotating roll. In this apparatus for repairing can bodies, an external coating machine is provided separately from the internal coating machine and is equipped with a coating gun that faces the external surface of the can body and is driven and rotated by the rotating roll, and the external coating machine includes the coating gun. What is claimed is: 1. A can body repair coating device, comprising: a chamber surrounding the can body and connected to an exhaust device; and a regulating frame positioned in front of the chamber and facing the outer surface of the can lid.