JPH0639952A - Surface treatment device of can barrel blank - Google Patents

Abstract

PURPOSE:To provide a surface treatment device which is capable of manufacturing a metal can barrel blank coated with polyester film on both surfaces efficiently. CONSTITUTION:A can barrel blank material supply means 3 which supplies a can barrel blank material 1 is installed continuously at the upstream side and a delivery means 4 at the downstream side, centered around a transport passage for transporting the can barrel blank material 1 in two rows. In addition, a dividing means is installed continuously to the delivery means, 4, and a single can barrel blank is finally obtained using the dividing means. Further, a heating means 7 and a cutting means 13 are provided halfway through the transport passage. Below the transport passage, the first film feed means 9 for feeding printed biaxially stretched polyethylene terephthalate film 8, is provided and the second film feed means 11 for feeding unprinted polyethylene terephthalate film 10 is provided above the transport passage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for applying a surface treatment to a can body blank used for a beverage can or the like, and more specifically, a polyester film is adhered and coated on both sides of the can body blank. It is related to the device.

[0002]

2. Description of the Related Art As a metal can body used for a container for beverages or the like, a can body portion is formed by welding and joining both end edges of a strip-shaped can body blank. A can body is known in which a separately manufactured can lid is double wound.

Conventionally, in the above-mentioned can body, in order to prevent the base metal from being corroded by the contact between the base metal and the contents or the flavor of the contents being changed due to the eluted metal component, an epoxy is applied to the inner surface of the can. -Coating is performed by applying a coating material such as phenol resin, while the outer surface of the can is coated to give it a beauty. For the coating, an undercoat layer, a paint layer, a coating layer, etc. are printed in a predetermined pattern on the inner and outer surfaces of the original plate of the can body blank several times, and each layer is printed by baking in a heating oven or the like. Be seen. After the printing and baking are completed, a single can body blank is obtained in which the original plate is cut into a plurality of pieces in the vertical and horizontal directions and the coating is applied to both surfaces. However,
In the process of manufacturing the can body, the working environment tends to be significantly contaminated by the organic solvent that is volatilized during the printing and baking and the residual heat of the heating oven.

Therefore, in order to reduce the pollution of the working environment,
It is desired to replace the coating by coating the inner and outer surfaces of the can body blank with a polyester film.

According to the can body obtained by coating the inner surface of the can body blank with the polyester film, corrosion of the base metal can be prevented, and at the same time, the resin can be applied to the inner surface of the can. The slightly eluted resin can protect the changing flavor of the contents. Further, according to the can body obtained by coating the outer surface of the can body blank with the printed polyester film, the outer surface of the can can be provided with beauty without coating.

By the way, when the can body blank is welded to form the can body portion, it is necessary to have exposed metal parts for welding on both edges of the can body blank. There has been a problem in that it is unavoidable that the process becomes complicated if both surfaces of the original plate, which is cut into a plurality of parts, are covered with a polyester film while leaving the metal exposed portions. In order to solve the above problem, a patent application has already been filed by the present applicant for an apparatus for efficiently coating the inner and outer surfaces of a can body blank with a polyester film (Japanese Patent Application No.
No. 200826).

This apparatus cuts an original plate into the width of a single can body blank and intermittently supplies a can body blank material obtained at intervals to a conveying path, and on this conveying path, one side surface is cut. A long biaxially stretched polyester film with a printing pattern corresponding to a single can body blank printed continuously at intervals in the longitudinal direction, and a plain, long polyester film on the other side are heated. The can body blank material, which is bonded by pressure bonding, is sandwiched by both polyester films and is connected in a long length, is cut at the connecting portion, and is further divided into a single can body blank. In the apparatus, both ends of the can body blank material are bonded by adhering a film formed to be narrower than the width of the can body blank material to the can body blank material that moves in a row at a constant interval on the transport path. The inner and outer surfaces of the can body blank material can be efficiently coated with the polyester film, leaving the exposed metal portion for welding at the edge.

In the present specification, the width of the can body blank means the circumferential length of the body part of the can formed by overlapping and welding the both end edges of the can body blank. It means the length including the length of the mating part.

However, in the above-mentioned apparatus, the can body blank material is conveyed vertically in a single line on the conveying path, and the processing capacity is limited. Therefore, an apparatus which can carry out the surface treatment more efficiently is desired. Be done. In order to improve the processing capacity, it is conceivable to arrange the can body blank materials in parallel and convey them to the conveying path. However, each can body blank material is arranged in parallel and conveyed individually in each column. When the polyester film is supplied to the above, the position where the polyester film is adhered to the can body blank material is shifted back and forth depending on the row, and the printing pattern is arranged in the same manner in the can body blank material of each row. Is difficult to bond, and it is difficult to process the can body blank material after the polyester film is bonded to each row at the same time.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and it is possible to efficiently manufacture a metal can body blank used for a beverage can or the like having both surfaces coated with a polyester film. An object is to provide a surface treatment device for a can body blank that can be used.

[0011]

In order to achieve the above object, the first aspect of the surface treatment apparatus for a can body blank of the present invention is obtained by cutting an original plate into a single can body blank width. A plurality of can body blank materials are arranged in parallel in a direction orthogonal to the conveying direction, and a conveying path for nipping and conveying by a pair of upper and lower rollers, and the plurality of can body blank materials, A can body blank material supplying means for intermittently supplying the carrier path with the longitudinal end positions aligned with each other, and a can body blank material which is provided in the middle of the carrier path and moves along the carrier path. A heating means and a long biaxially stretched polyester film on which a printing pattern and an identification mark corresponding to a single can body blank are printed in a grid pattern at intervals in the width direction and the longitudinal direction, respectively. 1 film supply device, In the biaxially stretched polyester film supplied from the first film supply device, the biaxially stretched polyester film is provided with portions corresponding to exposed metal parts for welding provided at both end edges of a single can body blank from the widthwise interval portion. A film obtained by cutting along a longitudinal direction of a stretched polyester film and dividing the film into a film having a width narrower than a single can body blank in which the print pattern and the identification mark are continuously printed at intervals in the longitudinal direction. A splitting device and a first crimping device for crimping the film split by the film splitting device to the can body blank material, which is provided above or below the transport path and is provided on the can body blank material. A first film adhering means for adhering a biaxially stretched polyester film, and a plain and long polyester film having a width narrower than that of a single can body blank, A second film supply device for supplying the same number of print patterns printed in the width direction of the axially stretched polyester film in parallel, and a polyester film supplied from the second film supply device to the can body blank material by pressure bonding. A second film adhering means for adhering the polyester film to the can body blank material, the second film adhering means being provided on the opposite side of the first film supplying means with the conveying path interposed therebetween. Detecting the identification mark printed on the biaxially stretched polyester film of the can body blank material sandwiched between the polyester films adhered on both sides by the first and second film adhering means and connected in a long shape The two polyester films that sandwich the can body blank material when a predetermined identification is detected, Cutting with a connecting portion, to obtain a surface-treated can body blank material in which both polyester films are adhered on both sides, and the surface-treated can body blank material is divided at the interval of the printing pattern at the same time. Can barrel blank dividing means for obtaining a large number of single can barrel blanks.

The can body blank material and each polyester film may be adhered by simple thermocompression bonding,
You may adhere | attach via a thermosetting resin type adhesive agent.

In the surface treatment apparatus of the first aspect of the present invention,
When the polyester films are bonded to the can body blank material via a thermosetting resin adhesive, the surface-treated can body blank material is provided between the cutting means and the can body blank dividing means. A second heating means for accommodating and heating a plurality of sheets and curing the adhesive between the polyester films and the can body blank material is provided.

Further, the surface treatment apparatus of the first aspect of the present invention is characterized in that cooling means for cooling the surface-treated can body blank material is provided upstream of the can body blank dividing means. The cooling means is for supplying the surface-treated can body blank material to the can body blank dividing means in a cooled state when finally dividing the surface-treated can body blank material into a single can body blank. When the second heating means is not provided, it may be provided between the first film adhering means and the second film adhering means and the cutting means, and between the cutting means and the can body blank dividing means. It may be provided. When the second heating means is provided,
In order to improve the thermal efficiency of the second heating means, it is preferable to directly supply the surface-treated can body blank material heated to press-bond each polyester film to the second heating means. Is preferably provided between the second heating means and the can body blank dividing means.

A second aspect of the surface treatment apparatus for a can body blank of the present invention is a can body blank material obtained by cutting an original plate into a width that can be divided into a plurality of sheets for each width of a single can body blank. A conveying path for sandwiching and conveying by a pair of upper and lower rollers, a can body blank material supplying means for intermittently supplying the can body blank material to the conveying path, and a conveying path provided in the middle of the conveying path. A heating means for heating the can body blank material moving along the path, and a printing pattern and an identification mark corresponding to a single can body blank are printed in a grid pattern at intervals in the width direction and the longitudinal direction. A single film feeding device for feeding a long biaxially stretched polyester film and a biaxially stretched polyester film fed from the first film feeding device from a space in the width direction into a single can. Torso blank A portion corresponding to a metal exposed portion for welding provided on an edge is cut out along the longitudinal direction of the biaxially stretched polyester film, and the print pattern and the identification mark are continuously arranged at intervals in the longitudinal direction. A film dividing device for dividing the printed film into a film having a width narrower than that of a single can body blank; and a first crimping device for crimping the film divided by the film dividing device to the can body blank material. A first film adhering means provided above or below the conveying path for adhering the biaxially stretched polyester film to the can body blank material; and a plain member having a width narrower than that of a single can body blank. A second film supply device that supplies the long polyester film in parallel with the same number as the printing pattern printed in the width direction of the biaxially stretched polyester film; A second crimping device for crimping the polyester film supplied from a second film supplying device to the can body blank material, and is provided on the opposite side of the first film supplying means with the conveying path interposed therebetween. A second film adhering means for adhering the polyester film to the can body blank material;
And detecting the identification mark printed on the biaxially stretched polyester film of the can body blank material sandwiched between the polyester films adhered on both sides by the second film adhering means and connected in a long shape, A surface-treated can body blank in which both polyester films that sandwich the can body blank material when an identification mark is detected are cut at a connecting portion that is sandwiched between the can body blank materials, and both polyester films are adhered to both sides. Cutting means for obtaining material,
A first can body blank dividing means for cutting the surface-treated can body blank material along the longitudinal direction to divide the surface treated can body blank material into a single can body blank width; A second can body blank dividing means for dividing the surface-treated can body blank material at intervals of the printing pattern to obtain a large number of single can body blanks at the same time.

The can body blank material and each polyester film may be adhered by mere thermocompression bonding, as in the case of the surface treatment apparatus of the first aspect, and may be adhered via a thermosetting resin adhesive. May be.

In the surface treatment apparatus of the second aspect of the present invention,
When the two polyester films are bonded to the can body blank material via a thermosetting resin adhesive, between the cutting means and the second can body blank dividing means,
A second heating means for accommodating and heating a plurality of the surface-treated can body blank materials to cure the adhesive between each polyester film and the can body blank material is provided.

Further, the surface treatment apparatus of the second aspect of the present invention is characterized in that a cooling means for cooling the surface-treated can body blank material is provided upstream of the second can body blank dividing means. And The cooling means is for supplying the surface-treated can body blank material to the second can body blank dividing means in a cooled state when finally dividing the surface treated can body blank material into a single can body blank. When the second heating means is not provided, it may be provided between the first film adhering means and the second film adhering means and the cutting means, and the cutting means and the first can body blank. It may be provided between the dividing means or between the first can body blank dividing means and the second can body blank dividing means.
Further, when the second heating means is provided, in order to improve the thermal efficiency of the second heating means, the surface-treated can body blank material heated to press-bond each polyester film is directly subjected to the second heating. Since it is preferable to supply the cooling means to the means, the cooling means is preferably provided between the second heating means and the second can body blank dividing means.

In the first and second aspects of the present invention, the plain polyester film does not need to have high strength because it is not printed and may be an unstretched polyester film, which may be uniaxial or biaxial. It may be a stretched polyester film.

As the above-mentioned plain or printed polyester film, a conventionally known one can be used, but a polyethylene terephthalate film is suitable from the viewpoint of suitability for the coating step and the quality of the can when it is formed into a can. ing.

Examples of the thermosetting resin adhesives include thermosetting epoxy adhesives.

[0022]

According to the surface treatment apparatus of the first aspect of the present invention,
As a biaxially stretched polyester film that has been printed,
A wide film is used in which a printing pattern and an identification mark corresponding to a single can body blank are printed in a grid pattern at intervals in the width direction and the length direction.

The biaxially stretched polyester film corresponds to the exposed metal portion for welding from the widthwise interval portion by the film dividing device while being drawn out from the film feeding device and being fed to the can body blank material on the conveying path. The part to be cut is cut off. As a result, the biaxially stretched polyester film is divided into narrower widths than a single can body blank because the printing pattern and the identification mark are continuously printed at intervals in the longitudinal direction.

Since the divided film divided as described above is continuous to the undivided portion on the upstream side, the print pattern and the printed pattern printed on the divided film are regulated by the undivided portion. The identification display maintains the grid-like arrangement before being divided. Then, the divided film is supplied and adhered to the can body blank material on the conveying path while maintaining the grid-like arrangement before being divided.

On the other hand, according to this surface treatment apparatus, a plurality of can body blank materials cut into the width of a single can body blank are arranged in parallel in the direction orthogonal to the conveying path and conveyed. . The plurality of can body blank materials are supplied to the conveying path by the can body blank material supplying means with their longitudinal ends aligned with each other, and move in the conveying path in the same state.

Therefore, by adhering the divided film to the plurality of can body blank materials, the printing pattern and the identification mark printed on the divided film are arranged in parallel even after being adhered to the can body blank material. Maintaining a grid-like arrangement prior to being divided by each row of the arranged can body blank material. Then, the can body blank material in each row arranged in parallel is conveyed in a state where the printing pattern and the identification display are synchronized, and the printing pattern and the identification display are shifted back and forth in the can body blank material in each row. Never.

As for the plain and long polyester film, the same number of films as the printing pattern printed in the width direction of the biaxially stretched polyester film are supplied in parallel to the can body blank material on the conveying path and bonded. It Since this film is plain, it is supplied irrespective of the positional relationship of the can body blank material in each row arranged in parallel,
To be glued.

Therefore, according to this surface treatment apparatus, the position of adhering the biaxially stretched polyester film on which the can body blank material of each row arranged in parallel is printed by the row does not shift back and forth, Since the printing pattern and the identification mark are conveyed while being arranged in the same manner in the can body blank material of each row, the can body blank material after the both polyester films are bonded can be simultaneously processed in each row, Can barrel blanks coated on both sides with polyester film are obtained with high yield.

In this case, the can body blank material and each polyester film can be adhered to each other by merely thermocompression bonding, but it is preferable to adhere them through a thermosetting resin adhesive, for example. Then, in the case of adhering through the thermosetting resin adhesive as described above, the surface-treated can body blank material is cut by the second heating means between the cutting means and the can body blank dividing means. It is preferable to heat so that the thermosetting resin adhesive interposed between the can body blank material and the polyester films can be surely cured. By doing so, when the surface-treated can body blank material is finally divided by the can body blank dividing means, the division is performed while the can body blank material and the polyester film are firmly bonded. Will be done and therefore
It is possible to obtain a can body blank in which the positional relationship between each of the polyester films and the material of the can body blank is surely aligned with a predetermined positional relationship.

The second heating means is provided between the cutting means and the can body blank dividing means so that the surface-treated can body blank material cut into a predetermined length by the cutting means is supplied. Therefore, a plurality of surface-treated can body blank materials can be accommodated and collectively processed.
Therefore, the heating of the surface-treated can body blank material housed first does not hinder the heating of the surface-treated can body blank material housed later, and the can body blank material connected in the long shape is heated. Since it is not necessary to heat the same while transporting it, or to heat the surface-treated can body blank material one by one while transporting it, the lengthening of the production line can be avoided and the heat treatment can be efficiently performed.

The surface-treated can body blank material having both the polyester films adhered on both sides is heated by a heating means and / or the second heating means for heating the can body blank material moving along the conveying path. Has been expanded. Therefore, the surface-treated can body blank material that has expanded as described above is cooled by the cooling means on the upstream side of the can body blank dividing means, and after returning to the original dimension, the can body blank dividing means is used. It is preferable to supply. By doing so, a can body blank having excellent dimensional stability can be obtained when the surface-treated can body blank material is finally divided by the can body blank dividing means.

Further, according to the surface treatment apparatus of the second aspect of the present invention, the printing is applied to the can body blank material cut into a width that can be divided into a plurality of sheets for each width of a single can body blank. The biaxially stretched polyester film and the plain polyester film thus produced are adhered in the same manner as in the former surface treatment device. Since the can body blank material is originally cut into the width, once the division film is adhered while maintaining the grid-like arrangement before the division, the print pattern printed on the division film. Does not shift back and forth in the width direction of the can body blank material. The can body blank material is divided into a plurality of sheets for each width of a single can body blank after the dividing film and the plain polyester film are adhered on both sides, and as in the case of the former surface treatment device. It is processed to give a single can body blank.

Therefore, according to this surface treatment device, in the can body blank material after the dividing film and the plain polyester film are adhered on both sides, there is no need to worry about the deviation of the printing pattern, and the yield is further improved. A can body blank is obtained which is coated on both sides with a polyester film.

Also in the surface treatment apparatus of the second aspect of the present invention, the can body blank material and each polyester film are adhered via a thermosetting resin adhesive as in the former surface treatment apparatus. Preferably, in this case, the thermosetting resin system is heated by the second heating means between the first and second film adhering means and the second can body blank dividing means. It is preferable to cure the adhesive.

Further, as in the former surface treatment apparatus, the surface-treated can body blank material is a surface that has been expanded as described above by the cooling means upstream of the second can body blank dividing means. It is preferable that the treated can body blank material is cooled, returned to its original size, and then supplied to the second can body blank dividing means.

[0036]

The present invention will now be described in more detail with reference to the accompanying drawings. FIG. 1 is a plan view schematically showing an embodiment of a surface treatment device for a can body blank according to the first aspect of the present invention, and FIG. 2 is an explanatory side view of a surface treatment device for a can body blank shown in FIG. FIG. 3, FIG. 3 is a front view showing a state in which a printed biaxially stretched polyethylene terephthalate film is cut, and FIG. 4 is an explanatory cross-sectional view showing a state in which the film along the line IV-IV of FIG. 2 is bonded. 5 is a plan view showing a can body blank material connected in a long shape by the apparatus shown in FIGS. 1 and 2, and FIG. 6 is a plan view showing the outline of another embodiment of the surface treatment device for a can body blank of the present invention. 7 is an explanatory side view of the surface treatment device for a can body blank shown in FIG. 1, and FIG. 8 shows a can body blank material connected in a long shape by the device shown in FIGS. 6 and 7. It is a top view shown.

As shown in FIGS. 1 and 2, the surface treating apparatus of this embodiment is arranged such that the can body blank material 1 cut into the width of a single can body blank is arranged in two rows and conveyed. A can body blank material supplying means 3 for supplying the can body blank material 1 is continuously provided on the upstream side of the transport path 2 and a payout means 4 is continuously provided on the downstream side thereof. A can body blank dividing means 5 is further connected to the dispensing means 4, and a single can body blank 6 is finally obtained by the can body blank dividing means 5. Further, as shown in FIG. 2, a heating means 7 and a first film supply means for supplying a printed biaxially stretched polyethylene terephthalate film 8 to be adhered to the can body blank material 1 in the middle of the conveying path 2. 9. A second film supply means 11, a cooling means 12 and a cutting means 13 for supplying the blank polyethylene terephthalate film 10 to each row of the can body blank material 1 arranged in two rows are provided. The first film supply means 9 is provided below the transport path 2 and the second film supply means 1 is provided.
1 is provided above the transport path 2.

Next, the above configuration will be described in detail.

First, the can body blank material supplying means 3 is, as shown in FIGS. 1 and 2, a slitter 15 for cutting the original plate 14 of the can body blank into the width of a single can body blank 6.
A lateral feed conveyor 16 that conveys the can body blank material 1 cut by the slitter 15 parallel to the axial direction of the slitter 15, a hopper 17 that temporarily stocks the can body blank material 1 that is conveyed by the lateral feed conveyor 16, and a hopper. Suction cups 18 for adsorbing the can body blank material 1 from 17 and arranging and transferring the can body blank material 1 on the conveying path 2 in two rows;
The can body blank material 1 arranged in rows is composed of two timing kickers 19 which are controlled by a supply control means which will be described later and which is supplied to the conveying path 2. The timing kicker 19 is connected at the base to form one device with two stations.

As shown in FIG. 1, the slitter 15 is provided with a plurality of blades 20 axially supported at a predetermined interval according to the width of the can body blank material 1, and the can body blank is rotated in accordance with the rotation of the slitter 15. The original plate 14 is cut into a predetermined width.

Next, the details of the transport path 2 and each means provided along the transport path 2 will be described.

As shown in FIG. 2, the conveying path 2 has a pair of upper and lower rollers 21a, 21 for simultaneously sandwiching the can body blank materials 1 arranged in two rows and conveying them in the longitudinal direction thereof.
b, 21c, 21d and 21e, each of the rollers 2
Before and after 1a, 21b, 21c, 21d and 21e,
Auxiliary rollers 22 for assisting the transportation by moving the can body blank material 1 on it are appropriately arranged.

A heating means 7 is first provided in the transport path 2 from the upstream side. The heating means 7 is a roller 21a.
And a high-frequency heating device 23 and a high-frequency temperature control device 24 provided downstream thereof. Roller 21a
Is a feed roller for guiding the can body blank material 1 supplied by the timing kicker 19 to the conveying path 2, and also serves as an induction heating jacket roller for preheating the can body blank material 1. Four high-frequency heating devices 23 are arranged along the conveying path 2 and heat both surfaces of the can body blank material 1 moving along the conveying path 2. Further, the high frequency temperature control device 24 is provided below the transport path 2.

The first film supplying means 9 and the second film supplying means 11 use the printed biaxially stretched polyethylene terephthalate film 8 and the plain polyethylene terephthalate film 10 as a high frequency heating device 23 and a high frequency temperature control device. It is arranged so as to adhere to the can body blank material 1 with respect to 24.

The first film supply means 9 comprises a first film supply device 25, a film dividing device 26 and a first pressure bonding device 27, and is provided below the transport path 2. Further, the first film supply device 25 includes a film coil 28 around which a long biaxially stretched polyethylene terephthalate film 8 is wound, a dancer roll 29 for adjusting the tension of the biaxially stretched polyethylene terephthalate film 8, and a biaxially stretched film. An edge control device 30 for adjusting the supply position of the polyethylene terephthalate film 8 to the conveying path 2 is provided. The film dividing device 26 includes a trim slitter 31 and a suction duct 3.
2 and.

The second film supply means 11 is composed of a second film supply device 33 and a second pressure bonding device 34, and is provided above the transport path 2. Further, the second film supply device 33 adjusts the tension of the film coil 35 in which the width is formed narrower than that of the single can body blank 6 and the plain and long polyethylene terephthalate film 10 is wound, and the polyethylene terephthalate film 10. The dancer roll 36 and the edge control device 37 that adjusts the supply position of the polyethylene terephthalate film 10 to the transport path 2. The film coil 35, the dancer roll 36, and the edge control device 37 are provided in two sets each.

The first pressure bonding device 27 and the second pressure bonding device 34 are both provided between the high-frequency heating device 23 and the high-frequency temperature adjusting device 24 in the transport path 2 to form a pair of upper and lower rolls. There is. The crimping devices 27 and 34 are configured so as to be able to perform a temperature adjusting action.

The film coils 28 and 35 are provided with a tension control device (not shown) on their shaft portions 28a and 35a in order to adjust the tension of the biaxially stretched polyethylene terephthalate film 8 and the polyethylene terephthalate film 10 which are drawn out. The tension control device includes dancer rolls 29 and 36.
Is configured to cooperate with and adjust the tension of the films 8 and 10. Further, the film coil 35 is configured to be vertically movable according to the tension of the polyethylene terephthalate film 10 that is pulled out.

Further, the first pressure bonding device 27 is provided with an encoder roller 38 which is in close contact with and interlocks with the pressure bonding device 27 via the supplied biaxially stretched polyethylene terephthalate film 8, and the encoder roller is provided. 38 includes a pulse encoder 39. An eye spot sensor 40 is provided on the upstream side of the trim slitter 31 so as to face the biaxially stretched polyethylene terephthalate film 8. The pulse encoder 39 and the eye spot sensor 40 are connected to a supply control device (not shown) and constitute a supply control means for controlling the operation of the timing kicker 19.

Two pairs of rollers 21b are continuously provided on the downstream side of the high-frequency temperature adjusting device 24 in the conveying path 2 and constitute the cooling means 12.

A cutting means 13 is provided on the downstream side of the cooling means 12 in the transport path 2. The cutting means 13 has two
A pair of constant velocity feed rollers 21c, a constant velocity feed roller 21d provided between the constant velocity feed rollers 21c, 21c and having a pulse encoder 41, and an eye spot sensor 42 provided below the conveying path 2. The knife cylinder 43 is operated by being controlled by a cutting control means which will be described later, and a knife origin sensor 44 which is provided in the vicinity of the knife cylinder 43 and detects the position of the knife attached to the knife cylinder 43. Further, the knife cylinder 43 includes a blade angular velocity encoder 45 for detecting the rotation angle of the knife cylinder 43 and measuring the angular velocity of the blade.
Is provided.

The downstream side of the knife cylinder 43 is the transport path 2.
And is provided with a roller 21e. A payout means 4 is connected to the end of the transport path 2.

Next, the payout means 4 will be described. As shown in FIGS. 1 and 2, the payout unit 4 includes a roller 21.
It is composed of a discharge conveyor 46 that is continuously provided downstream of e and a lateral feed conveyor 47 that is arranged below the discharge conveyor 46. A suction conveyor or the like is used as the discharge conveyor 46.

Next, the can body blank dividing means 5 will be described. The can body blank dividing means 5, as shown in FIG.
A slitter 4 provided on the downstream side of the lateral feed conveyor 47 and provided with a plurality of blades 48 axially supported at predetermined intervals.
It consists of 9. The plurality of blades 48 are pivotally supported by a slitter 49 in accordance with the height of the can body portion obtained by overlapping and welding both edges of the can body blank 6.

Next, the operation of the apparatus of this embodiment will be described with reference to FIGS.

First, as shown in FIG. 1, the original plate 14 of the can body blank is supplied to the slitter 15. The original plate 14 is
For example, it has a size of 829 mm × 875 mm, and the slitter 15 allows the width of a single can body blank 6, for example, 2
The can body blank material 1 is obtained by cutting into a width of 06.4 mm. The can body blank material 1 is finally further divided and has a size such that seven single can body blanks 6 are obtained. The slitter 15 has an original plate 14 with a width of 829 mm.
5 blades 20 are axially supported at equal intervals according to the width of the can body blank material 1 so as to obtain four can body blank materials 1 having a width of 206.4 mm and a length of 875 mm. The original plate 14 is cut in accordance with the rotation of the slitter 15.

The original plate 14 is rolled in the direction indicated by arrow G in FIG. In general, when the cutting distance is long when cutting the metal plate, it is advantageous to cut the metal plate so as to traverse the rolling direction of the metal plate. Therefore, the rolling direction G of the original plate 14 is set in the slitter 15 as described above. It is preferable to supply and cut so as to be orthogonal to the blade 20 being worn.

The can body blank material 1 obtained by cutting as described above is fed to the hopper 17 by the transverse feed conveyor 16.
Be transported to. The hopper 17 is a facility for temporarily stocking the can body blank material 1, and supports the can body blank material 1 in its longitudinal direction. The can body blank material 1 is adsorbed by the suction cup 18 provided above the hopper 17, taken out from the hopper 17, and transferred onto the auxiliary roller 22 at the upstream end of the conveying path 2. At this time, two can body blank materials 1 are taken out and arranged in two rows on the auxiliary roller 22 so that the sides parallel to the longitudinal direction are in contact with each other. Auxiliary roller 2
The can body blank material 1 transferred onto the sheet 2 is intermittently fed at a predetermined interval by a timing kicker 19 provided at the most upstream end of the conveying path 2 at a predetermined interval.
It is supplied to a and moves along the transport path 2 in two rows. The timing kicker 19 operates so that the can body blank material 1 matches the printing pattern printed on the biaxially stretched polyethylene terephthalate film 8 to be adhered to the can body blank material 1 in the next step, as described later. The timing kicker 19 is provided in two sets corresponding to the can body blank materials 1 arranged in two rows, and the two sets are operated in synchronization. Therefore, the can body blank materials 1 arranged in two rows are supplied to the feed roller 21a in a state where the tip positions in the longitudinal direction are aligned.

Next, the two can body blank materials 1 are sandwiched by the feed rollers 21a from the upper and lower sides and guided to the conveying path 2, the tip positions in the longitudinal direction coincide with each other, and the sides parallel to the longitudinal direction contact each other. In this state, it moves along the transport path 2.
The can body blank material 1 is preheated by the feed roller 21 a which also serves as an induction heating jacket roller, and then conveyed to the high frequency heating device 23. Can body blank material 1 is
By being conveyed in the high-frequency heating device 23, the surface temperature is heated to a range of 180 to 200 ° C.

Can body blank material 1 heated to the above temperature
Then, the biaxially stretched polyethylene terephthalate film 8 and the plain polyethylene terephthalate film 10 which have been printed are pressure bonded by the pressure bonding devices 27 and 34.

The printed biaxially stretched polyethylene terephthalate film 8 is pulled out from the film coil 28 provided below the conveying path 2 and the dancer roll 2
9 and the edge control device 30 to the trim slitter 31. As shown in FIG. 3, the biaxially stretched polyethylene terephthalate film 11 is printed with a print pattern 50 corresponding to a single can body blank 6 and an eye spot 51 as an identification display. The printed pattern 50 is continuously printed in the longitudinal direction of the biaxially stretched polyethylene terephthalate film 8 at intervals of the uncoated portions 52, 52a, while in the width direction both end edges of a single can body blank 6 are printed. Exposed Welding Metal Part 1 Formed on
Two of them are printed at intervals of the plain portions 53 corresponding to a and are arranged in a grid pattern. In addition, the eye spot 51 is printed on the wide plain portion 52a provided for each of the predetermined number of print patterns 50.

The biaxially stretched polyethylene terephthalate film 8 is cut by the trim slitter 31 at the plain portion 53 in the width direction along the longitudinal direction, and the printing pattern 5 is formed.
0 and the eye spot 51 are a solid portion 52 in the longitudinal direction,
It is divided into three parts, that is, divided films 8a and 8a which are continuously printed with an interval of 52a and a plain portion 8b corresponding to the exposed metal portion 1a for welding. The plain portion 8b is sucked into the suction duct 32 which is opened in contact with the downstream side of the trim slitter 31, and is discharged and removed. The division film 8a is divided into rows that are continuous in the longitudinal direction of the print pattern 50 and the eye spots 51, and by removing the plain portions 8b, the width becomes narrower than that of the single can body blank 6. Has become. The divided film 8a is supplied to each row of the can body blank material 1 moving along the transport path 2 and is crimped by the crimping device 27.

As the plain polyethylene terephthalate film 10, two films are prepared corresponding to the number of printing patterns 50 printed two by two in the width direction of the biaxially stretched polyethylene terephthalate film 8. Plain polyethylene terephthalate film 10
Are drawn from two sets of film coils 35 provided above the transport path 2 and are moving along the transport path 2 through the dancer roll 36 and the edge control device 37, respectively, in each row of the can body blank material 1. Is supplied to each.
Then, the crimping device 34 crimps the can body blank material 1 so as to correspond to the divided film 8a.

As shown in FIG. 4, the divided film 8a and the plain polyethylene terephthalate film 10 supplied to each row of the can body blank material 1 as described above are as follows.
Both sides of the can body blank material 1 are simultaneously thermocompressed and bonded by the pressure bonding devices 27 and 34. At this time, since the printed biaxially stretched polyethylene terephthalate film 8 and the plain polyethylene terephthalate film 10 are respectively supplied through the edge control devices 30 and 37, the split film 8a and the plain polyethylene terephthalate film 10 are provided. Are bonded to both end edges of each can body blank material 1 leaving the exposed metal for welding 1a.

As a result, a plurality of can body blank materials 1 arranged in two rows and forming rows, respectively, are divided film 8a of long biaxially stretched polyethylene terephthalate film 8 and plain and long polyethylene terephthalate. The can body blank material 1b, which is sandwiched by the film 10 and connected in a long shape as shown in FIG. 5, is formed.

The split film 8a adhered to each row of the can body blank material 1 was originally a single biaxially stretched polyethylene terephthalate film 8, but is divided and supplied for each split film 8a at the time of adhesion. So
The print pattern 50 printed on each of the divided split films 8a is regulated by the non-divided biaxially stretched polyethylene terephthalate film 8.
The same grid-like arrangement as before the division is maintained. On the other hand, each row of the can body blank material 1 arranged in the two rows is moving along the conveying path 2 in a state where the front end positions in the longitudinal direction coincide with each other. Therefore, the printing pattern 50 printed on each of the divided divided films 8a is the same as that before being divided even after being adhered to the can body blank material 1 in which the front end positions in the longitudinal direction of each row match. Maintains the grid-like arrangement. Therefore, in the can body blank material 1b connected in a long shape, as shown in FIG. 5, the position of the print pattern 50 printed on the divided film 8a adhered to each row is a side parallel to the longitudinal direction. Of the can body blank materials 1 arranged in parallel with each other in contact with each other. The divided film 8a divided from the printed biaxially stretched polyethylene terephthalate film 8 is
Although it is adhered to the lower surface of the can body blank material 1, FIGS. 1 and 5 show the surface to which the divided film 8a is adhered as the upper surface for convenience of description.

Further, in the can body blank material 1b connected in a long shape, the divided film 8a has a canned body blank material 1 having one plain portion 52a and another can body blank material 1a as shown in FIG. The printed pattern 50 is adhered so as to match the connecting portion 54 with 1 and not to straddle the connecting portion 54.

In the apparatus of this embodiment, the supply of the can body blank material 1 is controlled in order to press-bond the divided film 8a as described above. Next, a means for controlling the supply of the can body blank material 1 will be described. In the device of this embodiment,
Timing kicker 19, pulse encoder 39, and
The eye spot sensor 40 is connected to a supply control device (not shown). Further, the feed roller 21a and the pressure bonding device 27 are set so as to convey the supplied can body blank material 1 at a predetermined speed, and the encoder roller 38 rotates in synchronization with the pressure bonding device 27.

The pulse encoder 39 oscillates pulses at regular intervals as the biaxially stretched polyethylene terephthalate film 8 moves, and the pulses are input to the supply controller. When the divided film 8a is supplied to the can body blank material 1, first, the eye spot sensor 4
When 0, the eye spot 51 printed on the biaxially stretched polyethylene terephthalate film 8 is detected, and a detection signal is sent to the supply control device. When the supply control device receives the detection signal of the eye spot 51 from the eye spot sensor 40, the supply control device starts integrating the pulses, and after receiving the detection signal of one eye spot 51, the next eye
The number of times the pulse is oscillated by the time the detection signal of the spot 51 is received is counted, and the divided film 8a is calculated from the rotation speed of the encoder roller 38 and the pulse oscillation frequency.
Calculate the supply rate of.

When the supply control device receives the detection signals of the predetermined number of eye spots 51, the timing kicker 1
An operation command is output to 9, and the timing kicker 19 supplies the can body blank material 1 to the conveying path 2. By doing so, the can body blank material 1 can be printed on the biaxially-stretched polyethylene terephthalate film 8.
The spot body 51 is supplied to the conveying path 2 for each fixed number and is conveyed at the predetermined speed.
Gaps match the blank portions 52a between the print patterns 50, 50 and are connected at this portion. The timing kicker 19 is provided for each row of the can body blank material 1 arranged in two rows.
Are connected at the base to form one device. Since the timing kicker 19 operates in synchronism with the above-mentioned two stations in synchronization with the operation command, the can body blank materials 1 arranged in two rows are supplied to the transport path 2 in a state where the front end positions in the longitudinal direction match. .

In the bonding operation by the thermocompression bonding, since the pressure bonding devices 27 and 34 are constructed so as to be capable of controlling the temperature, the heated can body blank material 1
Is a biaxially stretched polyethylene terephthalate film 8, a polyethylene terephthalate film 19 and a pressure bonding device 2
A sudden cooling due to contact with 7, 34 is avoided.

The can body blank material 1b connected in a long shape as described above is further heated by the high-frequency temperature adjusting device 24 provided downstream of the conveying path 2,
180 to 20 after both films 8a and 10 are adhered
Since it is kept in the temperature range of 0 ° C., the adhesion of both films 8a, 10 to the can body blank material 1 is improved.

Can body blank material 1b connected in a long shape
After the two films 8a and 10 are adhered, the two rows synchronously move along the transport path 2 and are then guided to the cooling means 12 composed of two pairs of cooling rollers 21b and cooled to room temperature. By the cooling operation, the heated and expanded can body blank material 1b is cooled, returned to the original size and supplied to the slitter 49 described later, so that a single unit excellent in dimensional stability is provided. A can body blank 6 is obtained.

Can body blank material 1b connected in a long shape
Is then guided to the cutting means 13. In the apparatus of this embodiment, in order to reliably cut the can body blank material 1b connected in a long shape at the connecting portion 54, the knife cylinder 43 is used.
Controls the operation of. Next, the control means for actuating the knife cylinder 43 and cutting the can body blank material 1b connected in a long shape will be described.

In the apparatus of this embodiment, the pulse encoder 4
1, eye spot sensor 42, knife cylinder 4
3, blade origin sensor 44 and blade angular velocity encoder 45
Is connected to a cutting control device (not shown). The constant velocity feed rollers 21c and 21d are rotated at a constant velocity in synchronization with each other, and are set so as to convey the can body blank material 1b connected in a long shape which is pressure-bonded to the rollers and conveyed at a predetermined speed. Has been done. In addition, the pulse encoder 41
Oscillates a pulse at regular intervals every time the can body blank material 1b connected in a long shape is fed, and this pulse is input to the cutting control device.

In the cutting control means of the present embodiment, first, a predetermined eye spot printed on the divided film 8a adhered to the can body blank material 1b connected in a long shape by the eye spot sensor 42. When 51 is detected,
The detection signal is sent to the cutting control device. The cutting control device operates from the eye spot sensor 42 to the eye spot 5
When the detection signal of 1 is received, the pulses are started to be integrated, and the moving distance of the can body blank material 1b connected in a long shape is calculated by the number of pulses.

Next, the cutting control device uses the eye spot 5
When the number of pulse oscillations reaches a predetermined number after receiving the detection signal of No. 1, until the connecting portion 54 of the can body blank material 1b connected in a long shape reaches the cutting position in accordance with the data input in advance. It is determined that the distance and the distance until the knife reaches the cutting position by the rotation of the knife cylinder 43 match, and an activation command is output to the knife cylinder 43.

The knife cylinder 43 normally stands by at a position where the blade does not come into contact with the can body blank material 1b connected in a long shape which is conveyed on the conveying path 2, and is inputted in advance when the start command is received. Starts or accelerates rotation according to the data provided. At this time, the knife cylinder 43
The angular velocity of the blade attached to the blade is measured by the blade angular velocity encoder 45 and input to the cutting control device. The cutting control device compares the angular velocity of the blade with pre-input data, and when the angular velocity of the blade is not appropriate, outputs a correction command to the knife cylinder 43 to correct.

Then, by the blade attached to the knife cylinder 43, the constant velocity feed rollers 21c and 21c
The long can body blank material 1b connected at a predetermined speed by d is cut at the connecting portion 54.

The knife cylinder 43 cuts the connecting portion 54 of the can body blank material 1b which is connected in a long shape, and after the cutting tool origin sensor 44 detects the cutting tool attached to the knife cylinder 43, the cutting operation is performed. Continue to rotate. When the blade origin sensor 44 detects a blade, it outputs a detection signal to the cutting control device, which cuts the knife cylinder 43.
It is judged that the knife attached to the blade cylinder reaches a position where it does not come into contact with the can body blank material 1b connected in a long shape, and the knife cylinder 43 has returned to the standby position, and the rotation of the knife cylinder 43 is stopped or Slow down. When the length for cutting the can body blank material 1b is short, the knife cylinder 43 may be continuous only by accelerating and decelerating the rotation without starting and stopping the rotation for each cutting.

By the cutting operation described above, the can body blank materials 1b which are connected in a long shape and whose two lines are moving along the conveying path 2 in synchronism are cut by the connecting portion 54 in two lines at the same time. Two pieces of the surface-treated can body blank material 1c, in which the printed divided film 8a is adhered to one surface of the material 1 and the plain polyethylene terephthalate film 10 is adhered to the other surface, are simultaneously obtained. The surface-treated can body blank material 1c is cut into a predetermined number of print patterns 50 printed on the biaxially stretched polyethylene terephthalate film 8, for example, every seven. The surface-treated can body blank material 1c is the roller 2 at the downstream end of the conveying path 2.
It is discharged from the conveying path 2 to the payout means 4 by 1e.

Then, the surface-treated can body blank material 1c
Is transferred to the transverse feed conveyor 47 by the discharge conveyor 46 of the discharging means 4, is discharged in a direction orthogonal to the conveying direction of the conveying path 2, and is guided to the can body blank dividing means 5.

The surface-treated can body blank material 1c is divided into a single can body blank 6 by the slitter 49 of the can body blank dividing means 5 provided at the downstream end of the transverse feed conveyor 47. Eight blades 48 are provided on the slitter 49 in parallel with the conveying direction of the lateral feed conveyor 47 and axially supported at equal intervals so as to correspond to the length of a single can body blank 6. The surface-treated can body blank material 1c is printed while the 48 rotates, and the blank portion 5 between the printing patterns 50, 50 is printed.
Divide into individual can body blanks 6 at 2. As a result, seven can body blanks 6 are obtained at the same time. The length of the can body blank 6 corresponds to the height of the can body portion formed from the can body blank 6.

Although the can body blank material 1 is arranged in two rows in the above-mentioned embodiment, a large number of can body blank materials 1 may be arranged in parallel. At this time, the biaxially stretched polyethylene terephthalate film 8 has a width corresponding to the number of rows of the can body blank material 1, and the same number of printing patterns 50 as the number of rows of the can body blank material 1 are printed in the width direction. . Further, the same number of plain polyester films 10 as the print patterns 50 printed in the width direction of the biaxially stretched polyethylene terephthalate film 8 are supplied in parallel.

Next, one embodiment of the surface treatment apparatus of the second aspect of the present invention will be described with reference to FIGS. 6 to 8. 6 to 8, the same components as those of the previous embodiment shown in FIGS. 1, 2 and 5 are designated by common reference numerals, and the description thereof will be omitted.

As shown in FIGS. 6 and 7, the surface treatment apparatus of the present embodiment has a can body blank material 61 that is cut into a width that can be divided into two for each width of a single can body blank. A can body blank material supplying means 62 for supplying a can body blank material 61 is continuously provided on the upstream side of the carrying path 2 for carrying, and a first can body blank dividing means 63 and a payout means 4 are provided on the downstream side. It is a series of configurations. A second can body blank dividing means 64 is further connected to the dispensing means 4 so that a single can body blank 6 is finally obtained by the second can body blank dividing means 64. Further, as shown in FIG. 7, a heating means 7 and a first film supplying means for supplying a printed biaxially stretched polyethylene terephthalate film 8 adhered to the can body blank material 61 in the middle of the conveying path 2. 9. Second, supplying plain polyethylene terephthalate film 10 to can body blank material 61
Film supply means 11, cooling means 12 and cutting means 1
3 is provided. The first film supply means 9 is located below the transport path 2, and the second film supply means 11 is located below the transport path 2.
It is provided above each of.

Next, the above configuration will be described in detail.

First, the can body blank material supplying means 62
As shown in FIG. 6 and FIG. 7, a slitter 65 that cuts the original plate 14 of the can body blank into widths that can be divided into two for each width of the single can body blank 6, and a can body blank cut by the slitter 65. A lateral feed conveyor 16 that conveys the material 61 parallel to the axial direction of the slitter 65, a hopper 17 that temporarily stocks the can body blank material 61 that is conveyed by the lateral feed conveyor 16, and a can body blank material 61 is adsorbed from the hopper 17. It is composed of a suction cup 18 that is transferred onto the transport path 2 and a timing kicker 19 that supplies the can body blank material 61 to the transport path 2 under the control of a supply control means described later.

As shown in FIG. 6, the slitter 65 is provided with a plurality of blades 66 axially supported at predetermined intervals according to the width of the can body blank material 61, and according to the rotation of the slitter 65, the can body blank. The original plate 14 is cut into a predetermined width.

The transport path 2 and each means provided along the transport path 2 are the same as those in the above-described embodiment shown in FIGS. 1 and 2, but in the apparatus of this embodiment, the end portion of the transport path 2 is provided with the first part. One dividing means 63 is arranged in series.

Next, the dividing means 63 will be described. The dividing means 63, as shown in FIGS.
The slitter 68 is provided downstream of e and has a plurality of blades 67 axially supported at predetermined intervals. The plurality of blades 67 are pivotally supported by the slitter 68 according to the width of the single can body blank 6. The payout means 4 is provided downstream of the dividing means 63.
Are lined up.

The payout means 4 has the same construction as that of the embodiment shown in FIGS. 1 and 2, and the second dividing means 64 is connected downstream of the lateral feed conveyor 47.

The second dividing means 64 has the same structure as the dividing means 5 of the above embodiment shown in FIGS.
As shown in FIG. 7, a slitter 70 is provided on the downstream side of the lateral feed conveyor 47, with a plurality of blades 69 axially supported at predetermined intervals. The plurality of blades 69 are pivotally supported by the slitter 70 in accordance with the height of the can body portion obtained by overlapping and welding both end edges of the can body blank 6.

Next, the operation of the apparatus of this embodiment will be described with reference to FIGS. 6 to 8.

First, as shown in FIG. 6, the original plate 14 of the can body blank is supplied to the slitter 65. The original plate 14 is
For example, it has a size of 832 mm × 875 mm and is cut by a slitter 65 into a width that can be divided into two for each width of a single can body blank 6, for example, a width of 416 mm, and a can body blank material 61 is obtained. The can body blank material 61 is
After covering with the biaxially stretched polyethylene terephthalate film 8 and the polyethylene terephthalate film 10, it is divided into the width of a single can body blank 6 and finally further divided to obtain 14 single body barrel blanks 6. Has a size. 832 mm for the slitter 65
In order to obtain two can body blank materials 1 having a width of 416 mm and a length of 875 mm from the width original plate 14, three blades 66 are pivotally supported at equal intervals according to the width of the can body blank material 61. Plate 1 according to the rotation of the cage and slitter 65
4 is cut.

The can body blank material 61 obtained by cutting as described above is fed to the hopper 1 by the transverse feed conveyor 16.
7 and temporarily stocked in the same manner as the can body blank material 1 of the previous embodiment, and then the suction cup 18
Is picked up from the hopper 17 and transferred onto the auxiliary roller 22 at the upstream end of the conveying path 2.

The can body blank material 61 transferred onto the auxiliary roller 22 is supplied to the conveying path 2 in the same manner as the can body blank material 1 of the previous embodiment, and the divided film 8a and the plain polyethylene terephthalate film 10 are supplied. Are glued together. In the can body blank material supplying means 62, the timing kicker 19 is provided for each width of the single can body blank 6, and two timing kickers 19 are connected at the base to constitute one device. ing. The timing kicker 19 is designed so that two stations operate in synchronization with each other as in the previous embodiment.

The timing kicker 19 may be one of the double type, but in order to stably supply the can body blank material 61 to the conveying path 2, a single can body blank 6 is provided.
It is preferable that a plurality of timing kickers 19 are provided in accordance with the width of the can body blank material 61, one for each width. When a plurality of timing kickers 19 are provided in series, the plurality of timing kickers 19 are operated in synchronization with each other as in the previous embodiment.

As a result, the can body blank material 61 is sandwiched by the divided film 8a of the long biaxially stretched polyethylene terephthalate film 8 and the plain and long polyethylene terephthalate film 10 to form the long shape shown in FIG. The linked can body blank material 61b is formed.
In the can body blank material 61b, the split film 8a and the polyethylene terephthalate film 10 are bonded two by two at intervals of the exposed metal portion 61a for welding.
Further, the metal exposed portion 61a for welding is left on both longitudinal edges of the can body blank material 61b. The exposed metal portion 6 for welding between both polyethylene terephthalate films
1a is twice as wide as the exposed metal-exposed portions 61a for welding on both edges.

The split film 8a adhered to the can body blank material 61 was originally a single biaxially oriented polyethylene terephthalate film 8, but is divided and supplied for each split film 8a at the time of adhering. The printing pattern 50 printed on each of the divided films 8a is regulated by the undivided biaxially stretched polyethylene terephthalate film 8 and maintains the same grid-like arrangement as before the division. . on the other hand,
Since the can body blank material 61 is originally cut into widths that can be divided into two sheets for each width of the single can body blank 6, the printing pattern 50 printed on each of the divided dividing films 8a is the can body. Even after being bonded to the blank material 61, the same grid-like arrangement as that before the division is maintained. Therefore, the can body blank material 61 connected in a long shape
In b, as in the case body blank material 1 shown in FIG. 5, the positions of the print patterns 50 printed on the bonded divided films 8a are aligned in the width direction of the body cylinder blank material 61b. In this embodiment, can body blank material 6
Since 1 is cut to twice the width of the single can body blank 6, there is no possibility that the position of the printing pattern 50 may be shifted back and forth in the width direction after being connected in a long shape as described above. There is no.

The divided film 8a obtained by dividing the printed biaxially stretched polyethylene terephthalate film 8 is adhered to the lower surface of the can body blank material 61, which will be described with reference to FIGS. 6 and 8. For the sake of convenience, the surface to which the divided film 8a is adhered is shown as the upper surface.

Further, in the can body blank material 61b connected in a long shape, the split film 8a has the plain portion 52a of 1 in the same manner as in the case body blank material 1 shown in FIG.
Can body blank material 61 and another can body blank material 61
The printed pattern 50 is adhered so as to match the connecting portion 54 with and so as not to straddle the connecting portion 54.

In the apparatus of this embodiment, the supply of the can body blank material 61 is controlled in order to press-bond the divided film 8a as described above. The supply of the can body blank material 61 is controlled in the same manner as in the case body blank material 1 of the previous embodiment.

Next, the can body blank material 61b is guided to the cooling means 12 and cooled to room temperature. By the cooling operation, the expanded can body blank material 61b is cooled as in the case of the can body blank material 1 of the previous embodiment, and the single can body blank 6 having excellent dimensional stability is obtained.

Can body blank material 61 connected in a long shape
Then, b is guided to the cutting means 13 and, similarly to the case body blank material 1 of the previous embodiment, the long form body body blank material 61b is cut at the connecting portion 54,
A surface-treated can body blank material 61c in which the split film 8a having two lines of printing adhered to one surface of the can body blank material 61 and two lines of the plain polyethylene terephthalate film 10 adhered to the other surface is can get.

Since the surface-treated can body blank material 61c is still twice the width of the single can body blank 6, in the apparatus of this embodiment, the first can body blank dividing means 6 is then used.
Guided by 3. In the can body blank dividing means 63, the surface-treated can body blank material 61c is sandwiched by the slitter 68 between the two split films 8a, 8a, and the exposed metal portion 6 for welding is used.
The width of a single can body blank 6, for example 2
It is divided into 06.4 mm width.

As a result, the divided film 8a having the width of the single can body blank 6 printed on one surface is adhered,
Two sheets of the surface-treated can body blank material 61d in which the plain polyethylene terephthalate film 10 is adhered to the other surface are simultaneously obtained. In the surface-treated can body blank material 61d, the split film 8a and the polyethylene terephthalate film 10 are adhered to each other, leaving the metal exposed portions 61a for welding on both longitudinal edges of the body barrel material 61d.

Then, the surface-treated can body blank material 61d
Is transferred to the transverse feed conveyor 47 by the discharge conveyor 46 of the discharging means 4, is discharged in a direction orthogonal to the conveying direction of the conveying path 2, and is guided to the second can body blank dividing means 64.

The surface-treated can body blank material 61d is divided into a single can body blank 6 by the slitter 70 of the second can body blank dividing means 64 provided at the downstream end of the transverse feed conveyor 47. The slitter 70 is provided with eight blades 69 parallel to the conveying direction of the lateral feed conveyor 47 and axially supported at equal intervals so as to correspond to the length of a single can body blank 6. While rotating 69, the surface-treated can body blank material 61d is divided into individual can body blanks 6 at the blank portions 52 between the print patterns 50, 50, and seven can body blanks 6 are simultaneously formed as in the previous embodiment. Is obtained. The length of the can body blank 6 corresponds to the height of the can body portion formed from the can body blank 6.

In the above embodiment, the can body blank material 61 is used.
Although the width is divided into two for each width of the single can body blank 6, it may be divided into a larger number. At this time, the biaxially stretched polyethylene terephthalate film 8 has a width corresponding to the can body blank material 61, and the number of print patterns 50 corresponding to the number of divided can body blank materials 61 in the width direction are printed. . Further, the same number of plain polyester films 10 as the print patterns 50 printed in the width direction of the biaxially stretched polyethylene terephthalate film 8 are supplied in parallel.

Can body blank 6 obtained in each of the above examples
Is the metal exposed portion 1a or the metal exposed portion 61 at both edges.
Except for a, the outer surface of the can is a printed biaxially stretched polyethylene terephthalate film 8, and the inner surface of the can is a plain polyethylene terephthalate film 10.
It is covered with. And each can body blank 6 is
It is divided in accordance with the print pattern 50 printed on the biaxially stretched polyethylene terephthalate film 8. Therefore, the biaxially stretched polyethylene terephthalate film 8
The surface of the can is covered by the outer surface of the can so that the metal exposed portion 1a or the metal exposed portion 61a at both edges is overlapped and welded together to protect the flavor of the contents and corrode the base metal. Can be prevented, and the outer surface of the can body can be protected, and a can body excellent in aesthetic appearance can be obtained.

The can body blank 6 may be welded as it is to obtain the can body as described above, but may be trimmed such as cutting out unnecessary portions around it if desired.

Further, in the can body blank 6, the rolling direction of the base metal coincides with the direction connecting the metal exposed portions 1a or the metal exposed portions 61a at both ends. Therefore, in a can body obtained by overlapping and welding the exposed metal portion 1a or the exposed metal portion 61a on both edges of the can body blank 6,
The circumferential direction of the can body coincides with the rolling direction of the base metal.
As a result, when the can body is molded, its cross section does not have a polygonal shape, but is molded into a beautiful circular shape. Further, the welded joint can be advantageously performed in the can body.

Further, in general, since the metal plate is easily stretched along the rolling direction, cracks do not occur in the flange portion when forming the flanges at both ends of the can body, and thus flange processing, neck-in processing, etc. are advantageous. Can be done. When the can lid is doubly wound around the flange portion formed on the can body as described above, there is no crack in the flange portion, so that it is possible to avoid leakage of contents from the flange portion after the can lid is wound.

In each of the above-mentioned embodiments, the heating of the can body blank material 1 or the can body blank material 61 is performed by the feed roller 21a which also serves as an induction heating jacket roller, the high frequency heating device 23 and the high frequency temperature control device 24. A part or all of the above heating device may be a heating oven. Further, in order to further enhance the film adhesiveness, a heating oven or the like may be provided and reheated in a subsequent step of the roller 21e, if desired.

Next, another embodiment of the surface treatment apparatus of the first aspect of the present invention will be described with reference to FIGS. 2, 9 and 10.

In the surface treatment apparatus of this embodiment, as shown in FIG.
The configuration from the upstream side to the downstream side delivery means 4 of the transport path 2 shown in FIG. 2 is the same as that described above except that the cooling roller 21b shown in FIG. 2 is a mere constant velocity feed roller 21b having no cooling function. It is the same as the embodiment described above. And in FIG.
As shown in FIG.
It is composed of an upstream side conveyor 47a connected to the discharge conveyor 46 (see FIG. 2) and a downstream side conveyor 47b connected to the slitter 49 of the can body blank dividing means 5, and the second conveyor is provided between these conveyors 47a and 47b. A heating oven 71, which is a heating means, is interposed, and a cooling means 72 is provided in the middle of the conveyor 47b.

In this case, referring to FIG. 2, in the surface treatment apparatus of this embodiment, the polyethylene terephthalate films 8 and 10 wound around the film coils 28 and 35, respectively, are pressed onto the can body blank material 1. A thermosetting epoxy adhesive (not shown), which is a thermosetting resin adhesive, is applied to the surface to be preliminarily dried, and both films 8 and 10 are attached to the pressure bonding device 27,
When thermocompression-bonded to the can body blank material 1 by 34, the can body blank material 1 heated in the range of, for example, 180 ° C. by the high-frequency heating device 23 is bonded via the thermosetting epoxy adhesive, The surface-treated can body blank material 1c is obtained in the same manner as in the above-mentioned embodiment. Then, further through the heating oven 71, the downstream side conveyor 47b
The can body blank is divided into individual can body blanks 6 by the can body blank dividing means 5 after being transported to the container body and cooled by the cooling means 72.

The heating oven 71 is used to sufficiently cure the thermosetting epoxy adhesive present between the can body blank material 1 of the surface-treated can body blank material 1c and the polyethylene terephthalate films 8 and 10. The configuration is as shown in FIG.

That is, the heating oven 71 is provided with the heating duct 74 having the hot air supply port 73 provided above and the cold air supply port 75 provided at the upper side, and the heating duct 7 is provided above and below.
4 is provided with a cooling duct 76, a heating duct 74, and a circulation conveyor 77 circulating in the cooling duct 76. The circulation conveyor 77 supports a large number of supports for supporting the surface-treated can body blank material 1c. The member 78 is provided so as to project in the vertical direction. Below the heating duct 74, the end portion of the upstream conveyor 47a of the lateral feed conveyor 47 is inserted, and below the cooling duct 76, the downstream conveyor 47b.
The upstream end of is inserted.

In the heating oven 71, the surface-treated can body blank material 1c conveyed on the upstream side conveyor 47a is transferred from the upstream side conveyor 47a to the supporting member 78 below the heating duct 74 of the heating oven 71. Reprinted. The surface-treated can body blank material 1c transferred to the support member 78 is conveyed upward in the heating duct 74. The inside of the heating duct 74 is heated by the hot air supplied from the hot air supply port 73 so that the temperature becomes higher toward the upper side.
As it is transported inside the container 4, the temperature is raised to 215 ° C. in the first minute and kept at that temperature for 1 minute.

Then, the surface-treated can body blank material 1c
Is a portion of the heating duct 74 that is connected to the cooling duct 76 above, and is transferred from the supporting member 78 that has been placed until then to the supporting member 78 that is adjacent to the traveling direction side of the circulation conveyor 77. The inside of 76 is conveyed downward. Since the inside of the cooling duct 76 is cooled by the cold air supplied from the cold air supply port 75, the surface-treated can body blank material 1c is cooled in one minute while being conveyed in the cooling duct 76, and is cooled. Below the duct 76, it is transferred from the support member 78 to the downstream side conveyor 47b of the transverse feed conveyor 47.

By heating the surface-treated can body blank material 1c in the heating oven 71, the thermosetting epoxy-based adhesive interposed between the can body blank material 1 and the polyethylene terephthalate films 8 and 10 is completely cured. As a result, the can body blank material 1 and the polyethylene terephthalate films 8 and 10 are firmly bonded to each other via the thermosetting epoxy adhesive.

In this embodiment, the constant velocity feed roller 21b downstream of the high-frequency heating device 23 does not have a cooling function, so that the surface-treated can body blank material 1c is cut by the cutting means 1.
After being cut into a predetermined length by the width of the single can body blank 6 by 3, the sheet is supplied to the heating oven 71 while being heated as described above. Heating oven 71 having the above configuration
According to the above, since the surface-treated can body blank material 1c is carried in by the upstream side conveyor 47a, transferred to the support member 78, and sequentially conveyed in the heating duct 74 and the cooling duct 76, a plurality of surface treatments are carried out. The can body blank material 1c can be accommodated, and the production line can be shortened. Moreover, the heating of the surface-treated can body blank material 1c housed first does not hinder the heating of the surface-treated can body blank material 1c housed later, so that the heat treatment can be performed efficiently. it can.

The surface-treated can body blank material 1c in which the thermosetting epoxy adhesive has been completely cured by heating in the heating oven 71 is then fed to the downstream conveyor 47.
It is conveyed on b and introduced into the cooling means 72. Although the can body blank material 1 and the polyethylene terephthalate films 8 and 10 which form the surface-treated can body blank material 1c have expanded due to the heating, they are cooled in the cooling means 72 to the original size. Will be returned.

Although the surface-treated can body blank material 1c returns to its original size from the expanded state by simply allowing it to cool, the use of the cooling means 72 saves time and space required for cooling. Therefore, the production line can be shortened.

After that, the surface-treated can body blank material 1c is supplied from the downstream side conveyor 47b to the slitter 49, and is cut by the slitter 49 in the same manner as in the above-mentioned embodiment to obtain a single can body blank. It is divided into six. At this time, the can body blank material 1 of the surface-treated can body blank material 1c and the polyethylene terephthalate films 8 and 1
Since 0 is firmly adhered by a thermosetting epoxy adhesive in a predetermined positional relationship, the positional relationship between the two does not deviate during cutting / division, and in particular, the printing pattern 50 of the film 8 A desired can body blank 6 is obtained in a state where the positional relationship between the can body blank 6 and the can body blank 6 matches a predetermined positional relationship. Further, since the can body blank material 1 of the surface-treated can body blank material 1c and the polyethylene terephthalate films 8 and 10 are cooled, cutting / cutting
At the time of division, the original size is restored, and the can body blank 6 having excellent dimensional stability is obtained.

The structure in which the can body blank material 1 and the polyethylene terephthalate films 8 and 10 are bonded to each other by using the thermosetting epoxy adhesive in this manner is the same as the embodiment of the second aspect of the present invention described above. The same can be applied to the example. In this case, the polyethylene terephthalate films 8 and 10 are adhered to the can body blank material 61 (see FIG. 6) through a thermosetting epoxy adhesive as in the above-described embodiment, and further, the payout means 4 is attached. The heating oven and cooling means similar to those in the above-described embodiment may be provided in the middle of the lateral feed conveyor 47. Also in this case, by dividing the surface-treated can body blank material 61d into the can body blank 6, the can body blank material 61
And the polyethylene terephthalate films 8 and 10 are prevented from being displaced from each other, and the can body blank 6 having excellent dimensional stability can be obtained.

In each of the embodiments described above, it is preferable that a white paint or ink is applied to the side of the can body blank material 1 or the body barrel blank material 61 which is the outer surface of the can. By applying the white paint or ink in advance, it is possible to obtain an effect that the printing becomes clearer when the printed biaxially stretched polyethylene terephthalate film 8 is adhered.

Of the polyethylene terephthalate films, film 8 is biaxially stretched because strength is required for printing, but film 10 requires high strength because it is not printed. The film may be an unstretched film or a uniaxially or biaxially stretched film.

[0131]

As is clear from the above, according to the former surface treatment apparatus of the present invention, the biaxially stretched polyester film adhered to the can body blank material in each row arranged in parallel is printed. Since the positions of the printing pattern and the identification display are not shifted back and forth depending on the row, the printing patterns and the identification display are conveyed with the same arrangement of the can body blank material of each row, so that both polyester films are conveyed. The can body blank material after being adhered can be simultaneously processed in each row, and a can body blank whose both surfaces are coated with a polyester film can be efficiently obtained. Further, according to the latter surface treatment apparatus of the present invention, a biaxially stretched polyester film printed on a can body blank material cut into a width that can be divided into a plurality of sheets for each width of a single can body blank is bonded. Therefore, the positions of the printing pattern and the identification mark printed on the biaxially stretched polyester film do not shift back and forth in the width direction of the can body blank material, and both surfaces are more efficiently covered with the polyester film. A can body blank can be obtained.

Then, the can body blank heated by the heating means and the polyester film are bonded to each other via a thermosetting resin adhesive, and the second heating is performed before finally dividing into a single can body blank. By heating by a means so that the thermosetting resin adhesive can be sufficiently cured,
At the time of the division, the can body blank material and the polyethylene terephthalate film can be prevented from being displaced, and a good can body blank can be obtained. Also, the second
Since the heating means can store a plurality of the surface-treated can body blank materials, the heating treatment can be efficiently performed without lengthening the production line.

Further, before the final treatment of the surface-treated can body blank material coated on both sides with a polyester film into a single can body blank, the material is cooled by a cooling means to be heated and expanded to its original size. The can body blank having excellent dimensional stability can be obtained by returning the can body blank to the desired degree.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing an embodiment of a surface treatment device for a can body blank according to the first aspect of the present invention.

FIG. 2 is an explanatory side view of the surface treatment device for a can body blank shown in FIG.

FIG. 3 is a front view showing a state in which a printed biaxially stretched polyester film is cut.

FIG. 4 is an explanatory cross-sectional view showing a state in which the film along the line IV-IV in FIG. 2 is bonded.

5 is a plan view showing a can body blank material connected in a long shape by the apparatus shown in FIGS. 1 and 2. FIG.

FIG. 6 is a plan view schematically showing an embodiment of a surface treatment device for a can body blank according to the second aspect of the present invention.

7 is an explanatory side view of the surface treatment device for a can body blank shown in FIG.

8 is a plan view showing a can body blank material connected in a long shape by the device shown in FIGS. 6 and 7. FIG.

FIG. 9 is a plan view showing a main part of another embodiment of the surface treatment device for a can body blank according to the first aspect of the present invention.

10 is an explanatory sectional view showing the structure of a heating oven in the apparatus of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Can body blank material, 2 ... Conveying path, 3 ... Can body blank material supply means, 4 ... Ejection means, 5 ... Can body blank dividing means, 6 ... Can body blank, 7 ... Heating means, 8 ...
Printed biaxially oriented polyester film, 9 ... First film bonding means, 10 ... Plain polyester film, 11 ... Second film bonding means, 12 ... Cooling means, 13 ... Cutting means, 14 ... Original plate, 50 ... Printing pattern, 71 ... Second heating means (heating oven), 7
2 ... Cooling means.

Claims (6)

[Claims] 1. A plurality of can body blank materials obtained by cutting an original plate into a single can body blank width are arranged in parallel in a direction orthogonal to a conveying direction, and a pair of upper and lower rollers are provided. And a conveying path for sandwiching and conveying the can body blank material, and a can body blank material supplying means for intermittently supplying the plurality of can body blank materials to the conveying path with their longitudinal end positions aligned, and the conveying path. A heating means that is provided on the way and that heats the can body blank material that moves along the conveying path, and a printing pattern and an identification display corresponding to a single can body blank are spaced in the width direction and the longitudinal direction, respectively. And a biaxially stretched polyester film supplied from the first film feeding device for feeding the long biaxially stretched polyester film printed in a grid pattern in the width direction. From the space A portion corresponding to a metal exposed portion for welding provided on both end edges of one can body blank is cut along the longitudinal direction of the biaxially stretched polyester film, and the printing pattern and the identification mark are spaced in the longitudinal direction. A film dividing device that divides the film into a film that is continuously printed and is narrower than a single can body blank, and a first device that presses the film divided by the film dividing device onto the can body blank material. A first pressure bonding device, which is provided above or below the conveyance path and which adheres the biaxially stretched polyester film to the can body blank material.
And a long, plain polyester film narrower in width than a single can body blank, in parallel with the same number as the printing pattern printed in the width direction of the biaxially stretched polyester film. And a second film supply device for
A second crimping device for crimping the polyester film supplied from the film supplying device to the can body blank material, and is provided on the opposite side of the first film supplying means with the transport path interposed therebetween. Second film adhering means for adhering the polyester film to the can body blank material, and can body blanks sandwiched between the polyester films adhered on both sides by the first and second film adhering means and connected in a long shape Detecting the identification mark printed on the biaxially oriented polyester film of the material, and sandwiching the can body blank material when sandwiching the can body blank material when the predetermined identification mark is detected. Cutting means for obtaining a surface-treated can body blank material in which both polyester films are adhered to both sides, Surface treatment apparatus of the can body blank and having a can body blank dividing means for obtaining a number of single can body blank at the same time the surface treatment can body blank material is divided in portions of intervals of the print pattern. 2. The surface treatment between the cutting means and the can body blank dividing means when the both polyester films are adhered to the can body blank material via a thermosetting resin adhesive. The can according to claim 1, further comprising a second heating means for accommodating and heating a plurality of can body blank materials to cure the adhesive between each polyester film and the can body blank material. Surface treatment device for body blanks. 3. The surface of the can body blank according to claim 1 or 2, wherein cooling means for cooling the surface-treated can body blank material is provided upstream of the can body blank dividing means. Processing equipment. 4. A conveying path for conveying a can body blank material obtained by cutting an original plate into a width that can be divided into a plurality of sheets for each width of a single can body blank, and sandwiching the material with a pair of upper and lower rollers. A can body blank material supplying means for intermittently supplying the can body blank material to the conveying path; and heating for heating the can body blank material provided along the conveying path and moving along the conveying path. First means for supplying a long biaxially stretched polyester film in which a printing pattern and an identification mark corresponding to a single can body blank are printed in a grid pattern at intervals in the width direction and the longitudinal direction, respectively. And a biaxially stretched polyester film supplied from the first film supply device to a metal exposed portion for welding provided at both end edges of a single can body blank from a space in the width direction. Corresponding part Is cut along the longitudinal direction of the biaxially stretched polyester film, and the print pattern and the identification mark are continuously printed at intervals in the longitudinal direction and are narrower than a single can body blank. And a first crimping device for crimping the film divided by the film dividing device to the can body blank material, the film body being provided above or below the conveying path. First bonding the biaxially stretched polyester film to a blank material
And a long, plain polyester film narrower in width than a single can body blank, in parallel with the same number as the printing pattern printed in the width direction of the biaxially stretched polyester film. And a second film supply device for
A second crimping device for crimping the polyester film supplied from the film supplying device to the can body blank material, and is provided on the opposite side of the first film supplying means with the transport path interposed therebetween. Second film adhering means for adhering the polyester film to the can body blank material, and can body blanks sandwiched between the polyester films adhered on both sides by the first and second film adhering means and connected in a long shape Detecting the identification mark printed on the biaxially oriented polyester film of the material, and sandwiching the can body blank material when sandwiching the can body blank material when the predetermined identification mark is detected. Cutting means for obtaining a surface-treated can body blank material in which both polyester films are adhered to both sides, First can body blank dividing means for cutting the surface-treated can body blank material along the longitudinal direction to divide it into a single can body blank width; and the surface divided into the width of a single can body blank. Second can body blank dividing means for dividing the treated can body blank material at intervals of the printing pattern to obtain a large number of single can body blanks at the same time. apparatus. 5. When the both polyester films are adhered to the can body blank material via a thermosetting resin adhesive, between the payout means and the second can body blank dividing means, A second heating means for accommodating and heating a plurality of the surface-treated can body blank materials to cure the adhesive between each polyester film and the can body blank material is provided. The surface treatment device for a can body blank described in the above. 6. The can body according to claim 4 or 5, wherein a cooling means for cooling the surface-treated can body blank material is provided upstream of the second can body blank dividing means. Blank surface treatment equipment.