JP3747722B2 - Method and apparatus for manufacturing a two-piece can with a film label attached - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for producing a two-piece can with a film label attached.
[0002]
[Prior art]
Conventionally, two-piece cans are formed by drawing ironing, redrawing, etc. from metal blanks such as aluminum and steel, or composite blanks obtained by laminating these metal plates and synthetic resin films such as PET films. Thereafter, printing is performed on the outer peripheral surface of the can cylinder by offset printing or transfer printing directly from the plate cylinder. However, recently, in order to enhance the decorativeness of the container, it is required to print by a beautiful gravure printing or the like, and in order to meet this demand, it is difficult to directly perform gravure printing in the manufacturing process. As a means for overcoming the disadvantages of cans, various methods have been proposed for manufacturing two-piece cans by attaching a thermoplastic synthetic resin film such as a polyester film that has been pre-gravure-printed to a molded can body. (For example, Japanese Patent No. 2597020, Japanese Patent Laid-Open No. 8-1778, Japanese Patent Laid-Open No. 10-683, etc.).
[0003]
The above-mentioned conventional can manufacturing method and apparatus for sticking a printed synthetic resin film (hereinafter referred to as a film label) to a can body is mounted on a mandrel that is revolving and transported by a mandrel. Inside the can body heating process for heating the can body by induction heating, the film labeling process for pasting the film label supplied from the film sticking roll to the can body, It is discharged from the mandrel and sent to the next necking process. Further, as seen in JP-A-10-683, a mandrel heating step for heating the mandrel itself is provided before the can body heating step in order to raise the can body to a predetermined temperature in a short time. In some cases, the can body is also heated from the inner surface when the can body comes into contact with the mandrel. Alternatively, as can be seen in Japanese Patent Application Laid-Open No. 8-1778, it is known that the can body is preheated before being supplied to the mandrel roll.
[0004]
[Problems to be solved by the invention]
As mentioned above, the manufacturing method of the conventional film label sticking can body is heating a can body normally at 150-160 degreeC by a can body heating process, and a film label is made to the can body surface at a sticking station. When pressed with a predetermined pressure, the adhesive applied to the surface of the film label is melted and thermally bonded to the surface of the can body. And after sticking, when a mandrel reaches a can body discharge position, a can body will be discharged from a mandrel in that state. Therefore, the can body is naturally cooled to some extent until it reaches the discharge position (see cooling section D of Japanese Patent No. 2597020), but when the line speed increases, the can body is discharged from the mandrel with little cooling. It will be. As a result, when the line speed is increased by 1000 to 2000 cans / minute or more, a film label at the time of discharging from the mandrel, and in the case of a can body in which a synthetic resin film is laminated on the inner and outer surfaces, the inner side synthetic resin still in a high temperature state Since the film is in a state where wrinkles and scratches are likely to occur due to friction with the mandrel, this is a problem that must be solved in order to speed up the line. Also, when having a mandrel heating step as described above, when applied to a can body having a resin film inner layer, the resin film inner layer itself is heated and easily damaged, and when the can body is discharged from the mandrel, the inner layer is damaged. There is a problem that will let you.
[0005]
Also, when sticking film labels to the can body, if dust such as fine powder generated during can body molding adheres to the surface of the can body, the sticking property of the film label will deteriorate and wrinkles will occur. Therefore, in order to improve adhesion and appearance, it is required that these fine dusts and the like are not attached to the surface of the can body when the film label is attached. In particular, in the case of a can body laminated with a synthetic resin film, there may be cases where plastic pieces, powder, etc. are adhered to the surface of the can body, and after these fine powders are also effectively removed It is desirable to apply a film label.
[0006]
Accordingly, the present invention is to solve the above-mentioned problems of the conventional method and apparatus for manufacturing a film label sticking can body and to increase the speed of the line. Even when the speed of the line is increased, the can body can be discharged from the mandrel. Label can that is cooled sufficiently and can be discharged from the mandrel without generating scratches or wrinkles on the synthetic resin film laminated on the inner surface of the film label or can body, and a beautiful film label sticking can body can be obtained The main object is to obtain a method for manufacturing a body and an apparatus therefor, and it is possible to remove fine dust on the outer surface of the can body at the time of film label sticking to further improve the adhesiveness and appearance of the film label. The manufacturing method and apparatus of a film label can body are to be obtained.
[0007]
[Means for Solving the Problems]
  The manufacturing method of the two-piece can body of the present invention that solves the above-described problems is that the two-piece can body formed with the can body is fitted to a mandrel and is transported to the outer surface of the can body by the mandrel. In the film label sticking two-piece can manufacturing method for sticking a film label, a heating step of heating the can body to a predetermined temperature during transportation by the mandrel and sticking for sticking the film label to the heated can body Subsequent to the process, the can body having a film label attached thereto is cooled before being discharged from the mandrel, and before the can body heating step, dust attached to the outer surface of the can body is adhered and removed. Has a cleaning processIn the cooling step, the can body is cooled from the inner and outer surfaces by pressing the inner surface of the can body against the outer periphery of the mandrel by a cooling belt that moves while being in rotational contact with the outer surface of the can body.It is characterized by this.
[0008]
  By providing a curing step for curing the film label by heating the can cooled by the cooling step and discharged from the mandrel, the film label can be stably and reliably adhered to the line. Can be speeded up. Subsequent to the heating step, the can body can be heated to the temperature required for the pasting without heating the mandrel even if the line speeds up by heating the can body even in the pasting step. .
[0009]
  And the manufacturing apparatus of the film label sticking 2 piece can body of this invention fits the 2 piece can body in which the can body was shape | molded to a mandrel, and affixes a film label on the outer surface of a can body during conveyance with this mandrel. In a two-piece can manufacturing apparatus for attaching a film label, a can body to which a film label is attached following a revolving path of the mandrel, heating means for heating the can body to a predetermined temperature, and an attaching roll. A cooling means for cooling the container, and a cleaning means for adhering and removing dust adhering to the outer surface of the can body on the upstream side of the heating means.And the cooling means has an endless cooling belt that is brought into rotational contact with the outer surface of the can body that is engaged with the mandrel and presses the can body against the mandrel surface.It is characterized by.
[0010]
  In addition, it is desirable that the second heating means for heating the can body is disposed in an adhering area where the adhering roll is in rotational contact with the mandrel, thereby speeding up the line.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the embodiment of the film label sticking device concerning the present invention is described in detail.
The film label sticking apparatus according to the present embodiment has a mandrel rotating and conveying means 1 that revolves an endless track while rotating mandrels arranged at equal pitches, along the mandrel conveying path of the mandrel rotating and conveying means, Can supply means 2 for supplying a can to a mandrel, heating means 3 for heating the can body being conveyed, film label adhering means 4 for adhering a film label to the can body being conveyed, a film label is adhered from the mandrel The can body unloading means 5 for unloading the can body is disposed.
[0012]
Although providing the above means is the same as in the prior art, in the present embodiment, the can body cooling means 6 forcibly cooling the can body after the film label is adhered along the mandrel transport path of the mandrel rotation transport means. And a cleaning means 7 for cleaning the outer peripheral surface of the can body is arranged in the can supply means 2. Furthermore, a curing means for performing curing by heating the can carried out to the can carrying out means 5 is arranged in a subsequent process. Hereinafter, specific configurations of the respective means will be described in detail with reference to the drawings.
[0013]
Mandrel rotation conveying means
As shown in FIGS. 2 and 3, the mandrel rotating and conveying means 1 (hereinafter referred to as a mandrel roll) has a main shaft 11 rotatably supported on a frame 10 standing at a predetermined interval. The rotating body 12 is fixed and rotates integrally with the main shaft. A support plate 13 that integrally supports the mandrel 20, the can receiving pocket 24, and the air nozzle 25 can be displaced in the radial direction at an equal pitch with a can support pocket 33 of a can supply wheel 32, which will be described later, on the outer periphery of the rotating body. Are supported by a pair of support pins 14. The support pins 14 are slidably fitted in fitting holes 15 that are formed in the rotary body 12 radially at equal pitches as shown in the figure.
[0014]
  The cam plate is attached to both ends of the support plate 13 in the longitudinal direction.OLower 16 is provided and the camOThe lower is fitted in cam grooves 18 formed in a pair of cam plates 17 fixed to the frames 10 on both sides. Therefore, when the rotating body 12 rotates with the rotation of the main shaft 11, the support plate 13 provided at an equal pitch on the outer periphery also rotates. However, the support plate 13 is constrained by the cam groove and depends on the shape of the cam groove. Rotate while displacing in the radial direction of the rotating body. The cam groove is endless but not completely circular. As clearly shown in FIG. 1, the film label attaching section is recessed in the radial direction so as to follow the attaching roller.TsuThe king angle is increased. Thereby, a film label sticking section can be formed long, and the reliable sticking in a high-speed line is enabled. Further, since the support plate 13 is supported by a double cam structure of cam grooves provided on both sides, the rigidity is increased as compared with a conventional cantilever type support structure, and a high sticking pressure can be obtained. Thereby, the adhesion is stabilized and the speed can be increased.
[0015]
A base shaft 28 of a mandrel 20 is rotatably supported by a pair of bearings 26 on the upper surface of the support plate 13 in parallel with the main shaft 11. A roller 21 is fixed to the base end portion of the support plate 13. The cam groove 18 formed on the surface is in contact with a guide surface 22 similar in shape. Therefore, when the support plate 13 is rotated by the rotation of the main shaft 11, the mandrel 20 moves along the endless track while rotating (spinning) by the frictional contact between the roller 21 and the guide surface.
[0016]
The portion of the mandrel 20 that fits and supports the can body is heated by the temperature increase of the mandrel, particularly when the film label is attached to the can body in which the synthetic resin film is laminated on the inner surface. In order to prevent this, a temperature adjusting means is provided. As temperature control means, in this embodiment, hot water and cold water can be switched to flow inside, preventing the can body from being cooled by flowing hot water at the start of operation, and the mandrel is operated during operation. In order not to raise the temperature, the mandrel is cooled by flowing cold water to prevent the synthetic resin layer on the inner surface of the can body from being heated.
[0017]
Further, as described later, the high frequency induction coil 40 is disposed in the heating area to heat the can body, but if the mandrel is a material that is easily heated by high frequency induction heating, the mandrel is also heated together with the can body. As a result, the synthetic resin on the inner surface of the can that is in direct contact with the mandrel is also heated to a high temperature, causing a disadvantage. In the present embodiment, in order to prevent this, the mandrel core material is made of stainless steel, which is hardly affected by high-frequency dielectric heating and has high rigidity, and the outer skin is made of ceramics. Further, a flange-shaped ferrite plate 29 is disposed between the bearing structure portion supporting the base shaft of the mandrel and the can support portion to prevent high frequency from leaking into the bearing structure portion. In addition, the mandrel can be attached to the mandrel securely, and the mandrel can be securely discharged from the mandrel at the time of discharging. A hole 27 is formed.
[0018]
Can body supply means and can body cleaning means
As clearly shown in FIG. 1, the can body supply means 2 includes a chute 30, a star wheel 31, and a can body supply wheel 32, and is supplied with gravity from the chute 30 via the star wheel 31 in a lying state. The can body is supplied to the can body supply wheel 32 having the can body support pockets 33 at an equal pitch on the outer peripheral portion, and is supplied from the can body supply wheel to the can receiving pocket 24 provided on the support plate 13. The can receiving pocket 24 is provided on the support plate on the same axis as the mandrel, and the support plate 13 is moved by a cam while rotating to insert the opening end of the can into the mandrel and inject air from the air nozzle 25. Thus, the can body is fitted and attached to the mandrel 25. At that time, the air circulation groove 27 is in a suction state. In the can support pocket 33, a plurality of balls or needles 34 are rotatably disposed along the concave surface of the pocket and a magnet is disposed in order to rotatably attract and hold the can in a lying state. Yes. In place of the magnet, a suction hole may be formed on the pocket surface and attracted by negative pressure.
[0019]
And as shown in FIG. 1, the cleaning means 7 is arrange | positioned along the can body moving path | route of the can body supply wheel 32. As shown in FIG. The cleaning means 7 is composed of an endless adhesive belt 35 arranged so as to be in rotational contact with the can body conveyed in the pocket of the can body supply wheel 32, and the can being being conveyed by circulatingly driving the adhesive belt 35. By rotating and contacting the body, PET scraps and dust adhering to the can body surface are adhered and removed. The can body rotates in the pocket by making a difference between the movement speed of the adhesive belt (including the case of speed 0) and the peripheral speed of the can body supply wheel or by rotating the adhesive belt in the opposite direction to the can body supply belt. Then, the entire circumference of the can body can be cleaned by contacting the adhesive belt until the can body contacts at least one rotation or more.
[0020]
In the movement path of the adhesive belt 35, the adhesive belt cleaning means 36 and the cleaned belt are used for cleaning and removing the dust and resin waste adhering to the adhesive belt so that the adhesive belt can be recycled and used repeatedly. And a drying means 37 for drying the water. The belt cleaning means includes a pair of cleaning rolls 38 and a scraper 39 whose belt passing surface is arranged in the cleaning liquid. The cleaning rolls 38 and the scraper 39 remove dust and resin waste that are easily removed by being wetted with the cleaning liquid from the surface. Remove to restore stickiness. The wet adhesive belt is dried by passing the position where the drying means 37 is disposed. As the drying means, appropriate drying means such as heating with an appropriate heater, hot air, cold air, etc. can be employed.
[0021]
Can body heating means
The can body heating means 3 is fitted on the mandrel so as to heat the can body that is transported across the can body heating zone A on the downstream side of the can supply means shown in FIG. The high frequency induction heating coil 40 is arranged in the above. The can body attached to the mandrel passes through the section while rotating, so that the entire circumference of the can body is uniformly heated to a predetermined temperature by the induction heating action. Moreover, in this embodiment, as shown in FIG. 1, the 2nd high frequency induction heating coil 41 which heats a can body inside the passage path of a mandrel is arrange | positioned also in the film label sticking area b, and film label sticking is in progress. The can body is also heated. Thus, conventionally, in order to compensate for the natural cooling of the can body after the heating in the can body heating area until it arrives at the sticking area, the can body heating area has a temperature higher than the adhesive melting temperature of the film label. Although it was heated, according to this embodiment, since the can body is heated even in the sticking area, it is not necessary to heat the can body more than necessary in the can body heating area, and the synthetic resin film is particularly laminated on the inner and outer surfaces. The effect of protecting the synthetic resin film on the inner surface of the can body is great.
[0022]
On the other hand, when the line speed is increased, there is a disadvantage that a large alternating magnetic field must be generated in order to rapidly heat the can body up to the temperature required for sticking only in the can body heating area. Also, there is an adverse effect on the can body, which is a factor that hinders speeding up. Therefore, as described above, the method of heating the mandrel before the can body is mounted and heating the can body also from the inner surface, or the method of preheating the can body before supplying it to the mandrel roll is adopted. However, in this case, the above-mentioned problem occurs. In the present embodiment, such a problem can be solved at once by arranging the high-frequency induction heating coil also in the sticking area as described above.
[0023]
Film label sticking means
The film label sticking means is constituted by a sticking roll 45. The film label adhering means of the present invention has (1) a tracking angle between the mandrel roll and the adhering roll, (2) the adhering roll is larger in diameter than the conventional adhering roll, and the mandrel roll It has features such as being formed larger than the diameter, and (3) a higher lamination pressure can be obtained.
[0024]
The adhering roll 45 has a plurality of film label adsorbing surfaces 46 (24 surfaces in the present embodiment) at equal pitches for holding a film label cut to a predetermined length on its peripheral surface. Appropriate means such as electrostatic adsorption or vacuum adsorption can be adopted as the adsorption means for adsorbing the film label on the adsorption surface. By increasing the diameter of the sticking roll, the tracking angle with the sticking roll diameter can be increased without significantly indenting the mandrel transport path inward. Therefore, it is possible to reduce the amount of the mandrel that is pushed inward at the time of sticking, and the tracking path between the sticking roll and the mandrel can be brought into contact for a longer time with a small curvature, making the film label stable. Can be attached. Therefore, even with a high-speed line, a sufficient sticking time can be obtained, the speed of the line can be increased, and the fine sticking of the adhesive can be suppressed and beautifully attached.
[0025]
In this embodiment, as described above, since the support plate supporting the mandrel has a double cam structure that is supported by the cams on both sides, the rigidity of the apparatus is improved and stable at a high laminating pressure of 300 kg or more. And can be attached. In addition, in the conventional apparatus, in order to ensure a tracking angle with the sticking roll at the time of sticking, the mandrel structure is supported by the cam groove disposed on one side via the cam follower. When the whole becomes a cantilever support structure and strong rigidity cannot be obtained, and a high sticking load is applied, the mandrel is bent and the sticking load varies in the height direction of the can body. As a result, uniform sticking with a high sticking pressure is difficult, and the sticking load is limited.
[0026]
Can body cooling means
As shown in FIG. 1, the can body cooling means 6 is provided in the can body cooling area C between the sticking area b and the can discharge position. In this embodiment, as shown in an enlarged view in FIG. Although two cooling units 50 each having the cooling belt 51 are provided, the number is not limited. The cooling belt 51 is spanned between the cooling roll 52, the driving roll 53, the guide roll 54, and the dancer roll 55, and is circulated and driven at a constant speed while being cooled by contacting the cooling roll. It faces the circulation path of the can and is pressed against the outer surface of the can body in the section, and moves while being in rotational contact with the can body. In the figure, reference numeral 56 denotes a pressing rail for pressing the cooling belt 51 against the can body mounted on the spindle. The pressing rail 56 is made of a metal material such as stainless steel, and the biasing means such as a pair of plungers 57 press the cooling belt at a constant pressure. Pressed against the can body. In order to enhance the cooling effect, it is desirable to circulate cooling water inside the pressing rail. Reference numeral 58 denotes an infrared temperature sensor that detects the temperature of the cooling belt. 59 is a cooling belt drive motor.
[0027]
The can body cooling means of the present embodiment is configured as described above, and the can body inner surface is forced to the mandrel outer peripheral surface by pressing the can body with the film label attached thereto against the can body being conveyed by the mandrel. The inner surface of the can body is cooled by a mandrel in a low-temperature state while being contacted, and the outer surface of the can body is cooled by a cooling belt. The mandrel is kept at a low temperature because cold water circulates inside. Thereby, the can body is forcibly contact-quenched from inside and outside, and damage to the synthetic resin layer on the inner surface of the can body can be prevented. Thus, by rapidly cooling the can body from the inner and outer surfaces, the can body can be sufficiently cooled before the can body is discharged from the mandrel even if the speed of the line is increased. In addition, since the temperature at the time of sticking can be increased, the adhesiveness can be improved.
[0028]
Can body discharging means
The can body discharging means 5 is constituted by a can discharge turret 65 having pockets 66 formed at the same pitch as the mandrel on the outer peripheral portion, and the can receiving pocket 24 provided in the mandrel rotating and conveying means and the can receiving pocket can be synchronously rotated. To do. The mandrel rotating and conveying means blows pressurized air from the air circulation groove 27 formed inside the mandrel after passing through the cooling zone, while the air nozzle 25 becomes negative pressure and adsorbs the bottom of the can, thereby receiving the can body from the mandrel. It is transferred onto the pocket 24 and transferred to the pocket 66 of the discharge turret 65 at the discharge position. Subsequently, the can body is transferred from the discharge turret 65 to the transfer turret 70, and the defective can is rejected and sent to the conveyor.
[0029]
Curing means
The curing means comprises appropriate heating means such as hot air type and infrared type heaters arranged along the can conveyance conveyor as a separate process (not shown) on the downstream side of the transfer turret 70, and the film label is temporarily bonded at the sticking position. By heating the can body again, a curing process is performed in which the thermosetting adhesive is heated and cured to perform main bonding. As the heating means, for example, a net oven is adopted and heated to about 200 ° C.
[0030]
The apparatus for manufacturing a two-piece can with a film label attached according to this embodiment is configured as described above, and manufactures a two-piece can with a film label attached in the manufacturing process shown in the block drawing of FIG. 4 as follows. To do.
The can targeted by the present invention is a two-piece can formed by drawing and ironing from a metal plate such as aluminum or steel, or a composite material in which a synthetic resin film such as a PET film is laminated on both surfaces of the metal plate. In this embodiment, a case of a deep-drawn and ironed two-piece can made of a composite material in which a compatible resin film is laminated on both surfaces of a metal plate is shown. Moreover, a thermoplastic film such as a PET film can be adopted as the film label to be attached to the two-piece can body. In this embodiment, a PET film having a thickness of 12 μm is adopted and manufactured through the following steps.
[0031]
Printing process for multicolor gravure printing on the inner surface of the PET film, which is the original fabric, Finish varnish coating on the outer surface of the film label to provide slipperiness and decorativeness and to protect the film label The film label raw roll is obtained through a process, an adhesive coating process for coating an adhesive on the printed inner surface, and a slit process for slitting the film that has finished these processes at a can height width. In addition, after a printing process, a finishing varnish coating process, and an adhesive coating process, a drying process is provided so that a printing surface, a finishing varnish coating surface, and an adhesive coating surface may fully dry. Each of these processes may be performed continuously in one line, but after each accompanying drying process, the winding process, the printing process, the finishing varnish coating process, the adhesive coating process, and the slitting process are performed on separate lines. It may be performed separately.
[0032]
The film label can be applied to any form that is attached to the entire circumference of the can body, or to be attached to a part of the can body. In the case of film labels stuck in an overlapped state, in the above finishing varnish coating process, the surface of the portion located below the overlapping portion is applied so that the finishing varnish does not adhere to the surface, or the entire surface is applied. By removing the varnish of the part after application | coating, the adhesiveness of an overlap part is obtained. In the case of a film label that does not have an overlapping part, such as a film label that is attached to a part of the can body, a finish varnish is applied to the entire surface.
[0033]
In the film label sticking two-piece can manufacturing process, the film label original fabric 101 is unwound from the film label original fabric roll obtained as described above, as shown in FIG. Is cut into a predetermined width, and the film labels are sequentially supplied to the sticking roll 45. In this embodiment, as shown in the drawing, another set of cutter rolls is further arranged on the outer peripheral portion of the sticking roll 45, and two sets of film label supply means to the sticking roll are provided, and one set of films. As soon as the supply from the label supply means is completed, it is switched to the other film label means and supplied, and an empty film roll is replaced in the meantime so that the film labels can be supplied continuously and the line speed can be increased. ing.
[0034]
In the figure, 82 is a meandering control device, 83 is a meandering detection device, and 84 is a feed roll, and the film label original 101 is satisfactorily supplied between the cutting rolls without meandering. Reference numerals 85 and 86 denote film reject rolls. Reference numerals 87 and 88 denote a cooling roll and a charging roll disposed on the outer peripheral surface of the sticking roll 45 that electrostatically attracts and conveys the film label.
[0035]
On the other hand, the can body 100 is supplied from the chute 30 through the star wheel 31 to the can support pocket 33 of the can body supply wheel 32, and the outer peripheral surface of the can body is in rotational contact with the adhesive belt 35 of the cleaning means during conveyance. Fine powder such as PET waste and dust adhering to the outer peripheral surface are also completely removed, and then supplied to the can receiving pocket 24 provided on the mandrel roll. The can body supplied to the can receiving pocket 24 is attached to the mandrel 20 by the pressurized air from the air nozzle 25 before reaching the can body heating zone (a).
[0036]
At the start of operation, warm water is allowed to flow in the mandrel, and the temperature of the mandrel is raised to about 40-50 ° C. to prevent a temperature drop of the mounted can body, but during operation, cold water is allowed to flow in the mandrel, The temperature rise of the mandrel surface is prevented, and the temperature rise of the synthetic resin film layer on the inner surface of the can body in contact with the mandrel surface is prevented. In the can body heating zone, the can body is induction-heated by the high-frequency induction heating coil, and the temperature is raised to a temperature substantially equal to the melting start temperature of the adhesive. The heating temperature of the can varies depending on the type of adhesive and the type of resin of the film label, but the heating means is always controlled to the corresponding temperature.
[0037]
In the sticking area b, the mandrel 20 is displaced from the circular track by the cam groove 18 to a concave arc track along the circumferential surface of the sticking roll 45 as shown in FIG. It moves while rotating at the same peripheral speed as that of the landing roll. When the film label that is adsorbed and held on the outer peripheral surface of the adhering roll 45 reaches the adhering area, the adhering roll 45 cancels the adsorbing, and the adhesive surface of the label is applied to the outer peripheral surface of the can body attached to the mandrel. By rotating while pressing with the sticking pressure, the mandrel rotates synchronously (that is, the sticking roll surface rolls), and the film label is wound around and temporarily attached to the outer surface of the can body. At that time, in this embodiment, the tracking angle between the sticking roll and the mandrel roll is large, and the sticking section can be made long, so that the sticking roll continues to come into pressure contact while the can body makes one rotation or more, and as described above. Thus, the film label can be reliably and neatly adhered without generating bubbles or wrinkles.
[0038]
When it passes through the pasting area and reaches the can cooling area, the cooling belt 51 is pressed against the moving can body by the pressing rail 56 and the outer peripheral surface of the can body is cooled by the cooling belt. The inner surface of the cylinder is pressed against the outer peripheral surface of the mandrel to forcibly cool the can body from the inner surface.
[0039]
The mandrel rotating and conveying means blows pressurized air from the air circulation groove formed in the mandrel after passing through the cooling zone, so that the can body is transferred from the mandrel onto the can receiving pocket 24 and the discharge turret 65 is discharged at the discharge position. Transferred to the pocket 66. Next, when the discharge turret 65 and the conveyance turret 70 are engaged with each other, the can body is transferred to the conveyance turret 70, discharged to the conveyor, conveyed, and passed through a position where heating means such as an oven is disposed. Is reheated, and a curing process is performed in which the thermosetting adhesive is heat-cured to perform main bonding. Thereafter, the can body is transported to the next necking / flange processing step.
[0040]
【The invention's effect】
As described above, according to the method and apparatus for producing a two-piece can of the film label sticking of the present invention, the can is rapidly cooled in a state of being attached to the mandrel after sticking the film label. Even if the body heating temperature is increased and the line speed is increased, the can body is effectively cooled by the time of discharge from the mandrel, and high-speed and high-quality labeling is possible. In particular, in the case of a can body in which the can body is rapidly cooled from inside and outside by pressing the can body against the mandrel with a cooling belt, and the synthetic resin film is laminated on the inner surface of the can body, damage to the inner layer synthetic resin film is prevented, and high speed operation is performed. However, it can be discharged from the mandrel without generating scratches or wrinkles, and a beautiful film label-attached can body can be obtained even on a high-speed line.
[0041]
In addition, by providing a cleaning process for the outer surface of the can body before the heating process, there is no entanglement of fine dust or synthetic resin debris under the label when sticking the film label, improving the adhesiveness and appearance of the film label. Can be made. Moreover, by providing a curing process, the film label can be stably and reliably attached, and the line speed can be increased. Furthermore, following the heating process, the can body can be heated to the temperature required for the pasting without heating the mandrel even if the line speeds up by heating the can body even in the pasting process. In addition, it is not necessary to heat the can body more than necessary in the can body heating area, and the can body can be protected.
[Brief description of the drawings]
FIG. 1 is a schematic front view of an apparatus for manufacturing a film label sticking can according to an embodiment of the present invention.
FIG. 2 is a schematic side view of an essential part of the mandrel rotation conveying means.
FIG. 3 is an enlarged front view of the cleaning means.
FIG. 4 is a block diagram illustrating a manufacturing process of a film label pasting can according to an embodiment of the present invention.
[Explanation of symbols]
1 Mandrel rotating and conveying means 2 Can body supplying means
3 Can body heating means 4 Film label sticking means
5 Can body discharging means 6 Can body cooling means
7 Cleaning means 11 Spindle
12 Rotating body 14 Support pin
16 Cam follower 18 Cam groove
20 Mandrel 24 Can receiving pocket
25 Air nozzle 27 Air circulation groove
30 chute 31 star wheel
32 Can body supply wheel 35 Adhesive belt
36 Adhesive belt cleaning means 37 Drying means
40 High frequency induction heating coil 41 Second high frequency induction heating coil
45 Adhesion roll 46 Film label adsorption surface
50 Cooling unit 51 Cooling belt
52 Cooling roll 65 Discharge turret
71 Heating means 80, 81 Cutting roll
101 Film label original

Claims (5)

A two-piece can body formed with a can body is fitted to a mandrel, and a film label is attached to the outer surface of the can body while being transported by the mandrel. Following the heating step of heating the can body to a predetermined temperature and the attaching step of attaching the film label to the heated can body, before discharging the can body with the film label attached thereto from the mandrel A cooling process for cooling , and a cleaning process for adhering and removing dust adhering to the outer surface of the can body before the can body heating process , and in the cooling process, while rotating in contact with the outer surface of the can body A method for producing a two-piece can with a film label attached, wherein the can body is cooled from the inner and outer surfaces by pressing the inner surface of the can body against the outer periphery of the mandrel with a cooling belt .   The manufacturing method of the film label sticking 2 piece can of Claim 1 which heats a can body also in the said sticking process.   The manufacturing method of the film label sticking 2 piece can body of Claim 1 or 2 provided with the curing process which cures a film label by reheating the film label sticking can body discharged | emitted from the said mandrel. In a two-piece can manufacturing apparatus for film label attachment, in which a two-piece can body formed with a can body is fitted to a mandrel and a film label is attached to the outer surface of the can body while being conveyed by the mandrel, the mandrel revolves. A heating means for heating the can body to a predetermined temperature along the path, a cooling means for cooling the can body to which the film label is attached are arranged following the attaching roll, and upstream of the heating means. A cleaning means for adhering and removing dust and the like adhering to the outer surface of the can body , and the cooling means is rotationally contacted with the outer surface of the can body which is fitted to the mandrel and moves. An apparatus for producing a two-piece can with a film label attached , comprising an endless cooling belt that presses the body against the surface of a mandrel .   The manufacturing apparatus of the film label sticking 2 piece can body of Claim 4 by which the 2nd heating means which heats a can body is arrange | positioned in the sticking area where the said sticking roll rotates and contacts with a mandrel.

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