JP3386352B2 - Resin coating equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a welded can (food can,
The present invention relates to a resin coating device for producing a resin-coated metal plate used for a resin-coated can body such as a beverage can, an art can, and an 18-liter can.

[0002]

2. Description of the Related Art In recent years, resin-coated steel sheets have been formed into a tubular shape,
Resin-coated can bodies such as welded cans are produced and sold, and some methods for producing resin-coated steel sheets applied to these uses are presented, for example, JP-A-4-919.
There is a manufacturing method described in Japanese Patent No. 49 and Japanese Patent Application Laid-Open No. 6-182954. In any of these manufacturing methods, a resin film is laminated on a strip-shaped wide steel plate while providing a non-laminated portion which is not laminated on the resin film in a portion having a width of several mm which is a welding allowance when forming a welding can. It is to coat. In particular, in the method for producing a resin-coated metal plate described in Japanese Patent Laid-Open No. 4-91949, the resin film is divided immediately before it is laminated on the steel plate, and a portion which serves as a welding allowance is removed and then laminated to form a plurality of sheets. Manufactures steel sheets on which narrow resin films are laminated. On the other hand, in the method for producing a resin-coated metal plate described in JP-A-6-182954, immediately before laminating a resin film on a steel sheet, the resin film is divided and laminated on a heated steel sheet, and the resin film is heated in the width direction. By shrinking, a steel sheet in which a plurality of narrow resin films are laminated at intervals after lamination is manufactured.

[Problems to be Solved by the Invention]

However, each of these manufacturing methods still has the following problems to be solved. That is, in the method for producing a resin-coated metal plate described in Japanese Patent Laid-Open No. 4-91949, at the start of lamination of resin films, first, the tip of a wide resin film is brought into contact with a steel plate to be laminated, and then the resin immediately before lamination is used. Make a cut on the film with a cutter, cut the non-laminated part while running the resin film, suck and remove the non-laminated part cut by the suction device provided close to the cutter, and laminate only the laminated part on the steel plate It is something that is done. As described above, the non-laminated portion, which is a part of the wide film, must be removed as an unnecessary portion without fail, and the yield of the product is reduced to some extent. Further, at the start of stacking, the front end of the resin film unwound from the unwinder is covered on the entire surface of the steel sheet without being cut to a certain length, and then the resin film is cut, so that the entire surface of the steel sheet is cut. The portion coated with the resin must be removed as an unnecessary portion outside the product, which also causes a reduction in product yield.

On the other hand, in the method for producing a resin-coated metal plate disclosed in Japanese Patent Laid-Open No. 6-182954, the resin film is divided and laminated on a heated steel plate immediately before laminating on the steel plate, and the resin film is heated to form the resin film. Although the non-laminated portion is provided by shrinking in the width direction, it is extremely difficult to make the shrinking width always constant. by the way,
In the field of welding cans and art cans, which are the objects of the present invention,
In many cases, a resin film provided with a printing layer in which the same pattern is repeated is laminated on a steel plate, and after lamination, each pattern is cut into a cut plate of the same size, and molded into a tubular resin-coated can body. Therefore, if the resin films shrink non-uniformly during stacking, it becomes impossible to cut each pattern with the same size after stacking. Therefore, the method described in Japanese Patent Laid-Open No. 6-182954 cannot be applied to the present invention which is premised on laminating a resin film having a printing layer in advance on a metal plate.

According to the present invention, a wide resin film is cut and divided, the dimensional accuracy is good without heat shrinking the resin film, and the non-laminated portion is provided with a high yield without providing the resin film removing portion. It is an object of the present invention to provide an apparatus used for producing a resin-coated metal plate for coating on.

A resin coating apparatus according to a first aspect of the present invention is a facility for manufacturing a resin coated metal plate, which is disposed on one side or both sides of a strip-shaped wide metal plate which runs vertically from above to below, A film unwinder in which a resin film having a width narrower than that of the metal plate is wound into a roll, and a plurality of unwinding ends of the resin film are cut at the same intervals in the width direction while running the resin film. A cutter for dividing the narrow film into a narrow film, and changing the width in the running direction of the cut and divided narrow films to a direction for expanding the width to form a space between the side edges of the narrow films. After the set interval is formed between the steering roll of No. 1 and the side edge of each of the narrow films, the traveling direction of each of the narrow films is changed to hold each of the narrow films at the set interval. Board A second steering roll for running toward the metal plate, and a pair of laminating rolls for abutting and sandwiching each of the narrow films on the surface of the metal plate. To do.

The resin coating device according to a second aspect is the first aspect.
In the resin coating apparatus described in the above, as the resin film to be wound around the film unwinder, a resin film having printing on one side and an adhesive layer provided on the printing is used.

[0008]

[0009]

[0010]

[0011]

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to an embodiment shown in the accompanying drawings. In the attached drawings, FIG. 1 is a front view conceptually showing a resin coating apparatus used in a method for manufacturing a resin coated metal plate according to the present invention, FIG. 2 is a plan view of the same, and FIG. FIG. 4 is a schematic plan view showing a part of the resin-coated metal plate according to the present invention, and FIGS. 5-10 sequentially show the steps of the resin-coated can barrel and the method for manufacturing the resin-coated can according to the present invention. 6 is a plan view showing a cutting process, FIG. 6 is a perspective view showing a joining process, FIG. 7 is an enlarged sectional view of an essential part thereof, FIG. 8 is a plan view showing a repairing process, FIG. 9 is an enlarged sectional view of an essential part thereof, and FIG. FIG. 6 is a cross-sectional view showing a process of attaching and fixing a can bottom plate.

As shown in FIGS. 1 and 2, a resin coating apparatus J that can be suitably used in the method for manufacturing a resin coated metal plate according to the present invention is a metal plate 10 that runs vertically from the upper side to the lower side. Is disposed on one side. The resin coating device J can be provided not only on one side of the metal plate 10 but also on both sides. The configuration of the resin coating device J will be described with reference to FIGS. 1 and 2. An uncoiler 11 as an example of a film unwinder is disposed at a position farthest from the metal plate 10, and the uncoiler 11 includes a resin. The film 12 is wound in a roll shape. Between the uncoiler 11 and the metal plate 10, in order from the uncoiler 11 side, a first guide roll 13, a plurality of cutters 14 arranged at intervals in the width direction of the resin film 12, and a second Guide roll 15, third guide rolls 16 and 17, and first steering roll 18 to
21, the second steering rolls 22 to 25, and the fourth
And a guide roll 26 of. The portion of the metal plate 10 adjacent to the fourth guide roll 26 is sandwiched by the pair of laminating rolls 27 and 28.

In the above structure, a plurality of cutters 1
4 is a resin film 1 unwound from the uncoiler 11.
It is used to cut and divide 2 into a plurality of narrow films 12a to 12d. The first guide roll 13 and the second guide roll 15 are used to apply tension to the resin film 12 and ensure cutting by the cutter 14. Third guide roll 1
Reference numerals 6 and 17 are used to vertically sort the plurality of narrow films 12a to 12d. First steering rolls 18 to 21 and second steering roll 2
2 to 25 are used to change the traveling direction of the narrow films 12a to 12d. The pair of laminating rolls 27 and 28 are used for laminating the narrow films 12 a to 12 d on one surface of the metal plate 10.

Next, a method of manufacturing a resin-coated metal plate using the resin coating apparatus J described above will be described with reference to FIGS. As shown in FIGS. 1 and 2, the resin film 1
2 is unwound from an uncoiler 11, which is an example of a film unwinder, and guided to a plurality of cutters 14 via a first guide roll 13. As shown in FIGS. 2 and 3, the cutters 14 have the same width A (a length slightly shorter than the circumferential length of the resin-coated can 31 described later) and a plurality of cutters 14 (in the present embodiment, in the width direction of the resin film 12). 3) are provided. Then, with these cutters 14, the resin film 12
Is a plurality of articles each having a width A (4 in the present embodiment).
Strips) are cut and divided into narrow films 12a to 12d.
When a printing layer is provided on the outer surface of the resin-coated can 31, the width of the narrow films 12a to 12d after cutting and dividing is cut.
Width A, the same pattern as the height D of the resin-coated can body 30 whose length is to be produced is repeatedly printed in the width direction and the longitudinal direction using a wide resin film 12, and the width of the pattern is Narrow film 12a for each width A corresponding to
12d is cut and divided.

The narrow films 12a to 12d cut and divided from the resin film 12 are provided in front of the second guide roll 15 as shown in FIGS. 1 and 2, after passing through the second guide roll 15. 3rd guide roll 16, 1
7, the running directions of the adjacent narrow films 12a to 12d are vertically divided. That is, as shown in FIG. 2, the narrow films 12a and 12c are sorted upward, and the narrow films 12b and 12d are sorted downward.

As shown in FIG. 2, the adjacent narrow films 12a to 12d, which are vertically distributed, are on the same projection plane by the first steering rolls 18, 20 (upper) and 19, 21 (lower). The traveling direction is changed in the direction in which the width is opened, that is, the gap is formed between the side edges of the adjacent narrow films 12a to 12d. To change the traveling direction, specifically, each narrow film 12a-12
As shown in FIG. 3, the first steering rolls 18 to 21 are arranged so that d is separated from each other on the same projection plane.
This is achieved by twisting a predetermined angle θ _1, θ _2, θ _3, θ ₄ on the plan view.

The narrow films 12a to 12d whose traveling directions have been changed by the first steering rolls 18 to 21 so as to be separated from each other on the same projection plane include the second steering rolls 22 and 24 (upper) and the narrower films 12a to 12d. 23, 2
5 (below), each adjacent narrow film 12a-
12d has the same set spacing B on the same projection plane (as shown in FIG. 4, after coating the narrow films 12a to 12d having the width A with the spacing B at the center of the spacing B). A length (C: C = 1 / 2B +) obtained by adding a joining margin to the circumference of the resin-coated can body 30 that is going to manufacture the resin-coated metal plate 29.
A + 1 / 2B) has a space provided for cutting and dividing, and the traveling directions thereof are changed again so as to be parallel to each other. The change of the running direction is made by each narrow film 12a-
As shown in FIG.
This is achieved by twisting the second steering rolls 22 to 25 by a predetermined angle θ _5, θ _6, θ _7, θ ₈ on the same plan view as shown in FIG. As described above, the first steering rolls 18 to 21 and the second steering rolls 22 provided for the narrow films 12a to 12d are provided.
By adjusting the twist angles θ _{1 to} θ ₈ of ˜25, it is possible to cause the narrow films 12a to 12d to travel in parallel to each other with the same interval B on the same projection plane.

That is, as shown in FIG. 1, the narrow films 12a to 12d, which are arranged to run in parallel with each other at the same interval B on the same projection plane while passing through the two upper and lower paths, are shown in FIG. The fourth guide roll 26 provided at the front in the traveling direction makes the route thereof again one route traveling on the same plane, and then by a pair of laminating rolls 27 and 28, a heating means (not shown). Then, the resin-coated metal plate 29 is manufactured by being brought into contact with the heated metal plate 10 and sandwiched and laminated.

Although not shown, in the present embodiment,
The resin coating device J arranges a plurality of position detection sensors capable of detecting the side edge positions of the narrow films 12a to 12d in the width direction at a plurality of traveling positions of the narrow films 12a to 12d. ing. Therefore, each of the narrow width films 12a to 1a according to the signal from the position detection sensor.
The position of 2d in the width direction can be adjusted so as to be always constant by a fine adjustment device (edge positioner) not shown.

In this way, the resin-coated metal plate 29 is manufactured using the method for manufacturing a resin-coated metal plate according to the present invention. The method for manufacturing each narrow film resin-coated metal plate cut into the same width. Is the first steering roll 18-2
Since the traveling directions of the first and second steering rolls 22 to 25 can be adjusted independently of each other, each of the narrow films 12a to 12d after being cut and divided.
The intervals can be controlled to be the same with good dimensional accuracy. Moreover, since the divided resin films 12a to 12d have no portions to be removed, the resin-coated metal plate 29 can be produced with high yield.

As the metal plate 10, a cold rolled steel plate, a surface treated steel plate or the like is used. As the surface-treated steel sheet, a tin-plated steel sheet is usually used, but in addition, nickel plating,
Examples thereof include chrome-plated, zinc-plated, or various plated steel sheets obtained by laminating these. However, when the resin-coated can body 30 (see FIG. 10) is formed by using the welding method, it is preferable that tin plating is present on both front and back surfaces of the steel sheet in order to ensure good weldability. The tin-plated layer may be in the form of a layer or an island. Further, the plating thickness may be different on the front and back surfaces of the steel sheet.

As the resin film 12, a film made of a thermoplastic resin is preferable, and homopolyesters such as polyethylene terephthalate and polybutylene terephthalate, copolymerized polyesters such as ethylene terephthalate / isophthalate and butylene terephthalate / isophthalate, and bisphenol A. Examples thereof include polycarbonate and other polycarbonates, or a film made of a resin obtained by blending two or more of these. These films are unstretched non-oriented films,
Alternatively, either uniaxially stretched or biaxially stretched oriented film can be used, but the lamination work is easy,
A biaxially oriented film is more preferable from the viewpoint of corrosion resistance after being formed into a can and filled with contents.

[0024] One side of the resin film 12 may be printed on the side which becomes the outer surface of the can after being molded into a can to show the contents of the product or the image of the product. If printed,
In order to secure good adhesiveness with the metal plate, it is preferable to provide an adhesive layer on the printed layer, and heat-laminate the printed resin film and the metal plate 10 via the adhesive layer. . Further, regardless of the presence or absence of a printing layer, even when the above-mentioned heating lamination alone does not sufficiently adhere the resin film 12 made of the above-mentioned thermoplastic resin film to the metal plate 10, the adhesive layer is interposed as described above. It is preferable to heat and laminate the resin film 12 and the metal plate 10 together.

As the adhesive, any one of an epoxy adhesive, a phenol adhesive, an epoxy / phenol adhesive, an amide adhesive, a urethane adhesive, an acid-modified olefin adhesive, and a copolyamide adhesive is used. Examples of the adhesive include those described above, or adhesives obtained by blending these.

The thickness of the resin film is generally 3 to 50 μm.
It is preferably in the range of m. When the thickness is less than 3 μm, the rigidity of the film becomes extremely small, and wrinkles are likely to occur in the coating process shown in FIGS. 1 and 2, which makes the coating work extremely difficult. On the other hand, when the thickness is more than 50 μm, it is not preferable because it is disadvantageous in cost as compared with the paint widely used in the can manufacturing field.

Resin-coated metal plate 2 constructed as described above
As will be described later, 9 is used as a material to be molded as the resin-coated can body 30 of a three-piece can represented by a welded can including a top plate, a bottom plate, and a resin-coated can body 30. In the resin-coated metal plate 29 of the present invention, as shown in FIG. 4, the resin non-laminated portions 34 are provided on both sides of the resin laminated portion 33 at equal intervals. 4 is cut and divided at the center of each resin non-laminated portion 34, and as shown in FIG. 4, the width C (C = 1 / 2B + A + 1 /
2B) as a plurality of resin-coated metal strips 32, and further cut and divided, the resin-coated metal strips 32 are cut at a length corresponding to the height D of the resin-coated can body 30 to be manufactured. When forming a blank and forming the blank into a tubular shape to form the resin-coated can body 30, it is easy to overlap the resin non-laminated portions 34 having a width of 1 / 2B on both sides of the resin laminated portion 33 by welding or the like. This is because Resin laminated part 33
The width A and the interval B between the resin non-laminated portions 34 are
The size is particularly determined, and the size differs depending on whether it is used for a large can such as an 18-liter can or a beverage can having an internal capacity of about 200 ml.

Next, the resin-coated resin-coated can body 30, the resin-coated can, and their manufacturing method of the present invention will be described with reference to FIGS. When, for example, a welding can is manufactured from the resin-coated metal plate 29 manufactured by the above-described resin-coated metal plate manufacturing method, first, the wide resin-coated metal plate 29 shown in FIG. 4 has a width C shown in FIG. The resin-coated metal strip 32 is cut and divided. Next, the resin-coated metal strip 32 is cut at a right angle to the longitudinal direction of the resin-coated metal strip 32 in accordance with the height D of the resin-coated can body 30 to be manufactured. When a printing layer is provided on the outer surface of the can, the cut and divided resin-coated metal strips 32 have the same width as the cut and divided width A and the length of the resin-coated can body to be manufactured. Height D
Since the same and the same pattern is covered with a narrow resin film in which the same pattern is repeatedly printed in the longitudinal direction, the resin-coated metal strip 32 is provided for each length of the pattern (that is, the height D of the resin-coated can body 30). Disconnect. In this way, a rectangular blank 31 having a width C and a length D is obtained.

Then, the blanks 31 which have been previously cut and cut at the welding portions in this manner are formed into a cylinder so that the non-resin laminated portions 34 having a width of 1 / 2B face each other and are overlapped with a predetermined overlapping margin 35. It is molded into a shape (see FIG. 6). Then, as shown in FIG. 7, the overlapping margin (welding portion) 36
Is sandwiched between welding electrodes, and current is applied while applying pressure for welding. The overlap margin 36 varies depending on the size of the can to be manufactured, but is usually about 0.3 to 3.0 mm.

Width of the resin non-laminated portion 34 (1 / 2B)
Is determined in consideration of the size of the can and the overlapping margin 36 of the non-laminated portion. For example, in a small can such as a beverage can of about 200 ml, the width of the resin non-laminated portion 34 is about 1 to 3.
mm. Instead of welding, other joining means made of resin or tin alloy may be used.

Next, the entire resin non-laminated portion 34 including the welded portion, that is, the resin non-laminated portion 34 on both the inner surface side and the outer surface side of the resin-coated can body 30 of FIG. A resin coating 39 is formed by applying a repairing paint of a thermosetting resin or by attaching a resin film to prevent the contents from directly contacting the metal plate 10 and ensuring corrosion resistance. At this time, the resin coating 39 for repair is sufficiently coated to cover the end of the resin laminated portion 33 made of a resin film so that the base material of the metal plate 10 does not remain in an exposed state (FIG. 9). The paint used for the repair may be a liquid paint or a solid powder paint as long as it is a conventionally used paint, but a paint that provides high adhesion to the resin film is selected. As the repairing resin coating 39, one that can be heat-sealed with the resin film is selected.

Next, the tubular resin-coated can body 30 constructed as described above is subjected to an overhanging process at both upper and lower ends to form flanges 40 and 41. In some cases, the both ends are slightly reduced in diameter to reduce the diameter, and then the flange is formed. A can bottom plate (or a can lid plate, hereinafter referred to as a bottom plate) 42 shown in FIG. 10 is attached and fixed to the lower end of the resin-coated can body 30 on which the flange is formed, or the upper and lower ends in some cases. The can bottom plate 42 is the resin-coated metal plate 29 of FIG. 4 or a coated metal plate having corrosion resistance equivalent to that of the resin-coated metal plate 29, which has the same shape (for example, a circle) as the cross section of the resin-coated can body 38 and has an area slightly larger than that. The outer edge is punched out, the outer edge is molded so as to overlap with the flange formed at the end of the resin-coated can body 30, and the ring-shaped packing is formed on the outer edge. The outer edge portions of both end portions of the can bottom plate 42 are attached to the lower end portion of the resin-coated can body 30 or the flange portions of both upper and lower end portions in an overlapping manner, and are fastened and fixed by a seamer. FIG. 10 shows a case where the can bottom plate 42 is attached and fixed only to the lower end of the resin-coated can body 30.

[0033]

EXAMPLES The present invention will be described in more detail below with reference to examples. (Example) As shown in FIG. 11, the width is 161.5 m on one side.
m, length 107.9 mm of the pattern 50 are arranged side by side in the width direction, and printed so as to be arranged side by side continuously in the longitudinal direction. Further, epoxy-based adhesive is applied thereon at 30 mg / m ² 646 mm A long film 51 wound into a coil shape and made of a biaxially stretched polyethylene terephthalate film having a thickness of 16 μm and having a width of 10 μm is provided on one side of a surface-treated steel plate having a plate width of 663 mm that continuously runs described later. After unraveling from the uncoiler using the same device as the resin coating device J shown in FIGS. 1 and 2, after equally cutting and dividing into four narrow films with a width of 161.5 mm of the above pattern using a cutter , Using the first and second steering rolls, the distance between the narrow films is equal to 4 mm,
The surface coated with the epoxy adhesive was brought into contact with one side of the surface-treated steel sheet heated to 250 ° C. At this time, among the side edges of the narrow films at both ends of the four strips of narrow film, the side edges located on the opposite side to the other adjacent narrow films are 2 mm inside from the side edges of the surface-treated steel sheet. Abutted so as to be located at.

On the other hand, at the same time, using the same manufacturing apparatus as the resin coating apparatus J shown in FIGS. 1 and 2 provided on the other side of the surface-treated steel sheet, 30 mg / epoxy adhesive was applied on one side.
A long film, which is the same as the biaxially stretched polyethylene terephthalate film with a thickness of 16 μm and which has a width of 646 mm applied by m ^{2, is} wound off from the uncoiler using a cutter, and a width of 161 is obtained using a cutter. .5m
After equally cutting and dividing into four narrow strips of m of width, using the first and second steering rolls, the gaps between the narrow strips were made equal to 4 mm, and the other side of the heated surface-treated steel sheet, The surfaces coated with the epoxy adhesive were brought into contact with each other. At this time, among the side edges of the narrow films at both ends of the four strips of narrow film, the side edge located on the opposite side to the adjacent narrow film is 2 m from the side edge of the surface-treated steel sheet.
It contacted so that it might be located inside. As described above, immediately after each biaxially stretched polyethylene terephthalate film is brought into contact with one side and the other side of the heated surface-treated steel sheet, the three members are sandwiched and laminated by a pair of laminating rolls and rapidly cooled in water. Then dried. In this way, a resin-coated steel sheet was obtained in which the printed resin film and the transparent resin film were laminated at positions corresponding to the front and back of the surface-treated steel sheet.

The surface-treated steel sheet has a thickness of 0.18 m.
m, was used to form a tin plating layer in an amount of 150 mg / m ² on both surfaces of the steel plate width 662Mm, of 12 mg / m ² as chromium amount of a hydrated chromium oxide layer in this order.

The resin-coated steel sheet manufactured as described above is divided into resin-coated steel strips having a narrow width of 165.7 mm and having resin non-laminated portions of 2 mm on both sides, as shown in FIG. This resin-coated steel strip was further cut at regular intervals of 107.9 mm, which corresponds to the height of a can to be manufactured at right angles to the longitudinal direction, to obtain a blank with the same pattern printed on one side.

The blank thus obtained was rolled into a cylindrical shape having a diameter of 52.6 mm so that the surface on which the pattern was printed was the outer surface, and the non-laminated portions at both ends were overlapped by 0.4 mm and welded. However, it was possible to obtain a resin-coated can body in which a good weld portion was formed without peeling of the resin film due to welding heat. Further, polyester coating was applied to the non-laminated portion including the welded portion of the obtained resin-coated can body to repair the welded portion. Then, a cut to reach the steel plate base was put in a 5 mm square grid pattern on the repaired part with a knife, cellophane tape was adhered on it, and the cellophane tape was rapidly peeled off, but the polyester paint peeled on the cellophane tape was recognized. It was shown that the adhesion between the repair coating film made of polyester paint and the polyethylene terephthalate film was good.

Both ends of the resin-coated can body obtained as described above were subjected to a diameter reduction process and further flange-formed, and one end of the same surface-treated steel sheet was coated with an epoxy / phenolic paint on both sides. The can bottom plates manufactured from the coated steel plates were superposed and wound to form a can, which was then filled with coffee and the same can bottom plate as a can lid was superposed and wound. The coffee can thus obtained was sterilized by heating in high temperature steam at 130 ° C for 1 hour, left in a constant temperature chamber at 50 ° C for 3 months and then opened, and a corroded portion was found inside the can. No deterioration or deterioration of coffee was observed.

[0039]

According to the resin coating apparatus of the present invention, one end of the resin film is unwound from the film unwinder and is run toward the metal plate and in the same running direction as the metal plate while running the resin film. The unwinding ends are cut at equal intervals in the width direction to be divided into a plurality of narrow films, and a plurality of first steering rolls corresponding to the running directions of the cut and divided narrow films are respectively provided. To form a spacing between the side edges of each narrow film by changing the direction to widen the width, after the set spacing is formed between the side edges of each narrow film, the running direction of each narrow film , A plurality of second steering rolls corresponding to each other are used to make each narrow film run toward a metal plate while maintaining a set interval, and each narrow film is brought into contact with the metal plate and a pair of laminators are provided. And clamped by a roll was laminated on the surface of the metal plate so that to produce a resin-coated metal sheet. Therefore, a wide resin film can be cut and divided without providing a resin film removing portion, and the metal plate can be covered without heat shrinking, so that the resin film has a high dimensional accuracy and a high yield in the non-laminated portion. It becomes possible to provide and cover the metal plate. Further, by covering the metal plate with the resin film on which the design is printed, it is possible to easily cut the resin-coated metal plate into blanks for each design and form the resin-coated can body.

[0040]

[0041]

[Brief description of drawings]

FIG. 1 is a front view conceptually showing a resin coating device used in a method for producing a resin coated metal plate according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an enlarged cross-sectional view of the relevant part.

FIG. 4 is a schematic plan view showing a part of a resin-coated metal plate according to the present invention.

FIG. 5 is an explanatory view showing a cutting step of the method for producing a resin-coated metal plate according to the present invention.

FIG. 6 is an explanatory view showing a welding step of the method for producing a resin-coated metal plate according to the present invention.

FIG. 7 is an enlarged explanatory view of a main part of FIG.

FIG. 8 is an explanatory view showing a repair process for a welded part in the method for producing a resin-coated metal plate according to the present invention.

FIG. 9 is an enlarged explanatory view of a main part of FIG.

FIG. 10 is a cross-sectional view showing a can bottom plate attaching step in one embodiment of the resin-coated resin-coated can body and the resin-coated can manufacturing method according to the present invention.

FIG. 11 is a plan view showing a resin film on which a design is printed, which is used in an example of the method for producing a resin-coated metal plate of the present invention.

[Explanation of symbols]

A Width of resin laminated portion B Interval of resin non-laminated portion C Width obtained by adding the overlap margin to the circumference of the resin coated can body to be produced Height of resin coated can body to be produced (length of pattern) ) J Resin coating device 10 Metal plate 11 Uncoiler 12 Resin film 12a, 12b, 12c, 12d Narrow film 14 Cutter 18, 19, 20, 21 First steering roll 22, 23, 24, 25 Second steering roll 27 , 28 Laminating roll 29 Resin-coated metal plate 30 Resin-coated can body 31 Blank 32 Resin-coated metal strip 33 Resin-laminated portion 34 Resin-non-laminated portion 36 Overlap margin 39 Resin coating 40, 41 Flange 42 Can bottom plate 50 Design 51 Long film

Front page continuation (72) Inventor Hiroshi Inazawa 1302 Higashitoyo, Shimomatsu City, Yamaguchi Prefecture Toyo Kohan Co., Ltd. Shimomatsu Plant (56) References JP-A-4-91949 (JP, A) JP-A-10-151701 (JP) , A) JP-A-6-182954 (JP, A) JP-A-57-46869 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B32B 15/08

Claims (2)

(57) [Claims] 1. A manufacturing facility for a resin-coated metal plate, which is arranged on one side or both sides of a strip-shaped wide metal plate that runs vertically from above to below, the width being narrower than the metal plate. A film unwinder in which a resin film is wound into a roll, and while running the resin film, the unwinding ends of the resin film are cut at the same intervals in the width direction to divide into a plurality of narrow-width films. A cutter; a first steering roll for changing the running width of the plurality of cut narrow films to widen the running direction to form a space between the side edges of the narrow films; After running a setting interval between the side edges of the narrow film to change the running direction of each narrow film to run each narrow film toward the metal plate while maintaining the setting interval. First A steering roll, a resin coating apparatus characterized by having a pair of laminating rolls to laminate the sandwich with the surface of the metal plate with each narrow film in contact with the metal plate. 2. The resin film wound on the film unwinder is a resin film which is printed on one side and has an adhesive layer on the printing. The resin coating device described.