JP2005088967A - Container having patterned coating film and manufacturing method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container having a patterned coating film, which can be formed on the surface of the container, such as a can, by orienting the powdery magnetic material contained in a coating by the magnetic field of a magnet, and to provide a manufacturing method of the same. <P>SOLUTION: A liquid coating containing powdery magnetic material is applied to the surface of a container body 11. A pattern formation fixture 15 which has a magnet 15 corresponding to a pattern is inserted into the container body 11 before or after the application of the liquid coating. The magnetic material is oriented by the magnetic field of the pattern formation fixture 13 and is hardened before the fixture 13 is taken out of the container body 11. Thereafter, the pattern formation fixture 13 is taken out of it. Thus, the powdery magnetic material contained in the liquid paint applied to the surface of the container can be oriented by the magnetic field of the pattern formation fixture 13 inserted in the container body 11. In addition, hardening the liquid coating with the pattern formation fixture 13 kept inserted in the container and removing the fixture 13 from the container thereafter prevents the pattern from being disturbed by the removal of the magnet 15. Accordingly, using the magnetic material, the pattern can be formed on the container 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a container with a pattern coating film and a method for producing the same, and a pattern coating film formed by orienting a powdered magnetic material contained in a coating with a magnetic field by a magnet can be formed on the surface of the container. In particular, it can be formed on the surface of a can.

  As a method of forming characters, marks, designs, etc. on the surface of the object to be coated, adhesive tape printed with a conventional pattern is applied to the surface, or masking paper with a predetermined pattern cut out is used on the surface. Instead of applying a paint on top of it, apply a paint containing a powdered magnetic material, and orient the powdered magnetic material with a magnetic field by a magnet to create a pattern on the surface of the object. Various methods of forming have been proposed.

  For example, Patent Document 1 discloses a method for forming a patterned coating film by using a paint containing such a powdery magnetic material and orienting the magnetic material by a magnetic field.

  In this pattern coating film forming method, the process is shown in FIG. 5 (a), and the arrangement of the article to be coated and the magnet is shown in FIG. 5 (b). The magnet 2 having a shape corresponding to the pattern is disposed, and the base coating material 4 containing the powdered magnetic material 3 is applied to the coated surface, which is the surface of the workpiece W, in a dry film thickness of 15 to 5 in this state. Apply to 35 μm.

  Then, the magnetic force generated from the magnet 2 acts on the powdered magnetic material 3 in the base paint 4, and this powdery magnetic material 3 starts orientation in the base paint 4 having fluidity.

  As shown in FIG. 6, the orientation action of the powdered magnetic material 3 is similar to the case where the magnet 2 is not applied or the part where the action of the magnetic force is relatively weak is applied without attaching the magnet 2. The powdered magnetic material 3 is randomly arranged in the base paint 4, whereas the powdered magnetic material 3 is oriented along the lines of magnetic force at the portion where the magnet 2 is attached and the magnetic force is applied.

  In particular, since the magnetic part has a strong magnetic force in the periphery of the magnet 2, the powdered magnetic material 3 is attracted in the vicinity of the peripheral part to increase the density of the powder. Since it acts almost vertically, the powdered magnetic material 3 stands upright.

  Therefore, when the formed pattern coating film is observed, the portion where the powdered magnetic material 3 is dense along the periphery of the magnet 2 has a strong color of the magnetic material, while the central portion of the magnet 2 is the magnetic material 3. Since the light is upright, the reflected light is weakened and a gradation of blackish color is generated, and the pattern appears three-dimensionally.

In this pattern coating film forming method, after the base paint 4 is applied, the clear paint 5 is applied to the base paint 4 with a dry film thickness of 15 at a predetermined interval (preferably about 3 to 5 minutes). After applying the clear coating 5 after applying the clear coating 5, the magnet 2 disposed on the back surface of the coating W is removed together with the spacer 1 after a predetermined time (for example, 5 minutes), and the coating W is conveyed to a hot air drying furnace or the like, and the base coating material 4 and the clear coating material 5 are baked under predetermined drying conditions, so that the pattern coating film is cured on the plate-shaped object W.
JP-A-5-329436

  However, unlike the plate-like article W, the pattern coating film forming method is provided with a magnet 6 corresponding to a pattern as shown in FIG. 7 when applied to a container such as a three-dimensional can. The mandrel 7 is prepared, and the mandrel 7 is in a state in which the container 8 which is an object to be coated is mounted.

  And the coating material containing a powdery magnetic material is apply | coated to the outer surface of the container 8, and the applied powdery magnetic material is orientated with the magnet 6 put inside the container 8, and a pattern is formed.

  Thereafter, when the magnet 6 is to be removed for dry baking, the magnet 6 cannot be moved at a right angle to the coating surface like a plate-shaped object, and the magnet 6 together with the mandrel 7 is moved in the central axis direction of the container 8. There is a problem that the powdery magnetic material is dragged along with the removal of the magnet 6 so as to be dragged and become streaky as the magnet 6 is removed.

  In particular, in the case of a small-diameter cylindrical container that is mass-produced at high speed, such as a beverage can, it is necessary to place a mandrel in the container to support it, and to attach an orientation magnet to the mandrel. There is a problem that it is difficult to avoid the collapse of the pattern accompanying the removal of the magnet.

  The present invention has been made in view of the above-described problems of the prior art, and forms a pattern coating film formed on a surface of a container such as a can by forming a powdered magnetic material contained in a paint by aligning it with a magnetic field using a magnet. An object of the present invention is to provide a container with a patterned coating film and a method for producing the same.

  In order to solve the above-mentioned problems of the prior art, a container with a patterned coating film according to claim 1 of the present invention has a liquid paint containing a powdered magnetic material oriented on the surface of the container by a magnetic field. A pattern is formed.

  According to this container with a pattern coating film, a pattern in which the magnetic material is oriented by a magnetic field is formed on a liquid paint containing a powdered magnetic material on the surface of the container. Even in such a container, a pattern in which the magnetic material is oriented can be formed by curing in the orientation state by the magnet.

  The container with a patterned coating film according to claim 2 of the present invention is characterized in that, in addition to the structure according to claim 1, the liquid paint is composed of an ultraviolet curable resin or an electron beam curable resin. It is.

  According to this container with a pattern coating film, the liquid paint is composed of an ultraviolet curable resin or an electron beam curable resin, and the liquid paint can be cured in a very short time, and can be more easily powdered in a container such as a can. A pattern with oriented magnetic materials can be formed, and high-speed mass production can be handled.

  Furthermore, the container with a pattern coating film according to claim 3 of the present invention, in addition to the configuration according to claim 1 or 2, is printed on the outer surface of the pattern made of the magnetic material, or on the surface of the container so as to overlap the pattern. It is characterized by.

  According to the container with a pattern coating film, the outer surface of the pattern made of the magnetic material or the surface of the container is printed so as to overlap the pattern. By printing in addition to the pattern made of the magnetic material, The decorativeness and design of the container can be improved.

  Moreover, the container with a pattern coating film of Claim 4 of this invention added the structure in any one of Claims 1-3, and comprised the said container with the can of the nonmagnetic material, It is characterized by the above-mentioned. It is.

  According to this container with a pattern coating film, the container is constituted by a can made of a nonmagnetic material, and a pattern made of a magnetic material can be formed on an aluminum can or the like.

  Furthermore, in the method for producing a container with a pattern coating film according to claim 5 of the present invention, a liquid paint containing a powdered magnetic material is applied to the surface of the container, and the pattern is applied before or after application of the liquid paint. A pattern forming jig provided with a magnet corresponding to the above is inserted into the container, the magnetic material is oriented by the magnetic field of the pattern forming jig, cured before removal of the pattern forming jig, and then the pattern forming jig. It is characterized by removing the tool.

  According to this method of manufacturing a container with a pattern coating film, a liquid paint containing a powdered magnetic material is applied to the surface of the container, and a pattern is provided with a magnet corresponding to the pattern before or after application of the liquid paint. Insert the forming jig into the container, orient the magnetic material by the magnetic field of the pattern forming jig, cure before removing the pattern forming jig, and then remove the pattern forming jig, The powdered magnetic material contained in the liquid paint applied to the surface of the container can be oriented by the magnetic field of the pattern forming jig inserted into the container, and the liquid paint can be cured with this pattern forming jig inserted. Then, by removing from the container after that, it is possible to form a pattern made of a magnetic material on the container while avoiding the collapse of the pattern caused by removing the magnet.

  According to a sixth aspect of the present invention, in addition to the structure according to the fifth aspect, the liquid paint is made of an ultraviolet curable resin or an electron beam curable resin, and the magnetic material is used. It is characterized by being cured by being irradiated with ultraviolet rays or electron beams after being oriented.

  According to this method for producing a container with a patterned coating film, the liquid paint is composed of an ultraviolet curable resin or an electron beam curable resin, and after the magnetic material is oriented, it is cured by irradiation with ultraviolet rays or an electron beam. The liquid coating material is made of UV curable resin or electron beam curable resin, and can be cured in a very short time by irradiating UV or electron beam after orienting the magnetic material. In addition, it is possible to form a pattern in which a powdered magnetic material is oriented, and it is possible to cope with high-speed mass production.

  Furthermore, the manufacturing method of the container with a pattern coating film of Claim 7 of this invention adds to the structure of Claim 5 or 6, and at least the said powdery magnetic material moves the hardening after the orientation of the said magnetic material. It is characterized by curing so as not to occur.

  According to this method for manufacturing a container with a patterned coating film, the magnetic material is cured after orientation so that at least the powdered magnetic material does not move, and the magnetic material does not move. Therefore, the pattern can be formed by preventing the pattern from being collapsed by taking out the magnet, and the manufacturing speed can be further increased.

  Moreover, in addition to the structure in any one of Claims 5-7, the manufacturing method of the container with a pattern coating film of Claim 8 of this invention removes the said pattern formation jig | tool from the said container, and is recured. It is characterized by doing so.

  According to this method for manufacturing a container with a pattern coating film, the pattern forming jig is removed from the container and then re-cured. When the pattern forming jig is taken out by this re-curing, it is in a semi-cured state. However, the orientation pattern of the magnetic material can be completely cured.

  Furthermore, the manufacturing method of the container with a pattern coating film of Claim 9 of this invention adds to the structure in any one of Claims 5-8, and the said pattern is piled on the outer side of the said magnetic material, or the said pattern. It is characterized by printing on the surface of the container.

  According to this method for producing a container with a pattern coating film, printing is performed on the outer surface of the pattern made of the magnetic material or on the surface of the container so as to overlap the pattern, and printing is performed in addition to the pattern made of the magnetic material. Thus, the decorativeness and design of the container can be further improved.

  Moreover, in addition to the structure in any one of Claims 5-9, the manufacturing method of the container with a pattern coating film of Claim 10 of this invention used the said container as the can of a nonmagnetic material, To do.

  According to this method of manufacturing a container with a pattern coating film, the container is a can made of a non-magnetic material, and a pattern made of a magnetic material can be formed on an aluminum can or the like.

  According to the container with a pattern coating film according to claim 1 of the present invention, a pattern obtained by orienting the magnetic material by a magnetic field on a liquid paint containing a powdery magnetic material remains on the surface of the container in an orientation state by a magnet. It can be formed by curing or the like, and even if it is a three-dimensional container instead of a plate shape, a pattern in which a magnetic material is oriented can be formed.

  Moreover, according to the container with a pattern coating film according to claim 2 of the present invention, since the liquid paint is composed of an ultraviolet curable resin or an electron beam curable resin, the liquid paint can be cured in a very short time, A pattern in which a powdered magnetic material is oriented can be more easily formed in a container such as a can, and high-speed mass production can be handled.

  Furthermore, according to the container with the pattern coating film according to claim 3 of the present invention, since the outer surface of the pattern made of the magnetic material or the surface of the container is superimposed on the pattern, the pattern made of the magnetic material is used. In addition, the decorativeness and design of the container can be further enhanced by printing.

  Moreover, according to the container with a pattern coating film of Claim 4 of this invention, since the said container was comprised with the can of a nonmagnetic material, the pattern by a magnetic material is formed with respect to an aluminum can etc. It can be differentiated by improving the decorativeness and design compared to conventional cans.

  Furthermore, according to the method for manufacturing a container with a pattern coating film according to claim 5 of the present invention, a liquid paint containing a powdered magnetic material is applied to the surface of the container, and before or after the application of the liquid paint. A pattern forming jig provided with a magnet corresponding to the pattern is inserted into the container, the magnetic material is oriented by the magnetic field of the pattern forming jig, cured before the pattern forming jig is removed, and then the pattern is formed. Since the jig is removed, the magnetic powder material contained in the liquid paint applied to the surface of the container can be oriented by the magnetic field of the pattern forming jig inserted into the container. By hardening the liquid paint in the inserted state and then removing it from the container, it is possible to avoid the collapse of the pattern due to the removal of the magnet and to form a pattern made of a magnetic material on the container.

  According to the method for manufacturing a container with a patterned coating film according to claim 6 of the present invention, the liquid paint is composed of an ultraviolet curable resin or an electron beam curable resin, and after aligning the magnetic material, Since it is cured by irradiating with an electron beam, the liquid coating is made of UV curable resin or electron beam curable resin, and after aligning the magnetic material, it is cured by irradiating with UV or electron beam for a very short time. It is possible to form a pattern in which a powdered magnetic material is oriented in a container such as a can more easily, and it is possible to cope with high-speed mass production.

  Furthermore, according to the method for manufacturing a container with a patterned coating film according to claim 7 of the present invention, the magnetic material is cured after orientation so that at least the powdered magnetic material does not move. Since the movement of the magnetic material does not occur, the pattern can be formed by preventing the collapse of the pattern due to the removal of the magnet, and the manufacturing speed can be further increased.

  Moreover, according to the manufacturing method of the container with a pattern coating film of Claim 8 of this invention, since the said pattern formation jig | tool was removed from the said container and it recured, pattern formation treatment was carried out by this recuring. When the tool is taken out, the orientation pattern of the magnetic material can be completely cured even in a semi-cured state.

  Furthermore, according to the method for manufacturing a container with a pattern coating film according to claim 9 of the present invention, the outer surface of the pattern made of the magnetic material or the surface of the container is printed so as to overlap the pattern. By performing printing in addition to the pattern by, the decorativeness and design of the container can be further enhanced.

  Moreover, according to the manufacturing method of the container with a pattern coating film of Claim 10 of this invention, since the said container was made into the can of a nonmagnetic material, the pattern by a magnetic material forms with respect to an aluminum can etc. can do.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1: is explanatory drawing of the schematic process at the time of applying to one embodiment of the manufacturing method of the container with a pattern coating film of this invention, and applying to a drink can as a container.

  For example, as shown in FIG. 1, the container 10 with a patterned coating film uses a non-magnetic material can or the like as the container body 11, and a liquid paint containing a powdered magnetic material on the outer surface thereof is oriented with a magnet. The pattern coating film 12 is formed.

  As the container body 11, for example, a two-piece can made of cylindrical aluminum for beverages is used, and is particularly useful for a container having a small cross-sectional area. However, the container body 11 is not limited to aluminum cans for beverages, but other metals and plastics. Can be used widely, and the cross-sectional shape is not limited to a circle, but can be a variety of shapes such as a rectangular or polygonal shape such as a cylinder or a square tube with a constant cross section from the bottom to the opening. Alternatively, as long as the cross-section has a larger opening than the bottom (if the pattern forming jig 13 described later can be inserted and removed from the opening), the cross-section may not be constant.

  In order to form the pattern coating film 12 on such a cylindrical container 10, a pattern forming jig 13 is used as shown in FIG. The pattern forming jig 13 includes a mandrel 14 having a diameter slightly smaller than the inner diameter of the container body 11 and a magnet 15 corresponding to the pattern to be formed attached to the outer surface of the mandrel 14.

  Here, for example, the letter “A” is formed so as to appear three-dimensionally as the pattern coating film 12 before and after the outer surface of the container main body 11, and here, it corresponds to the contour of A on both sides of the mandrel 14. A shaped magnet 15 is attached.

  The magnet 15 is composed of a permanent magnet. For example, the outer surface of the container body 11 is curved by using a magnet rubber (ferrite magnet based on nitrile rubber) which is a permanent magnet having flexibility. Thus, it is possible to form a pattern having a predetermined shape even when it is complicated.

Next, the manufacturing method of such a container 10 with a pattern coating film is demonstrated concretely.
In this method of manufacturing a container with a pattern coating film, first, a pattern forming jig 13 is mounted on the container body 11 as shown in FIG.

  Thereafter, as shown in FIG. 1B, a liquid paint containing a powdery magnetic material is applied to the surface of the container body 11.

  The liquid paint is applied before the pattern forming tool 13 is inserted even after the pattern forming jig 13 composed of the mandrel 14 and the magnet 15 corresponding to the pattern is inserted into the container body 11. You may make it apply | coat to the container main body 11. FIG.

  This liquid paint is obtained by mixing a powdered magnetic material in a paint mainly composed of a vehicle component and a solvent, and a normal paint resin can be used as the vehicle component, which is cured by heating and drying. Or a resin that is reactively cured by ultraviolet rays or electron beams.

  As specific thermosetting resins, alkyd resins, polyester resins, acrylic resins, urethane resins, amino resins, epoxy resins, and the like can be used. As ultraviolet curable resins, alicyclic epoxy resins, acrylate resins, and the like are used. be able to. Furthermore, so-called ultraviolet curable paint (UVC) or electron beam curable paint (EBC) can be used.

  Moreover, an organic solvent and water are mentioned as a solvent of a thermosetting resin. Examples of the form of the paint include liquids such as an organic solvent type, a non-aqueous dispersion type, an aqueous solution type, and an emulsion type.

  In addition, a coloring pigment, dye, aluminum powder, a pearl pigment, mica etc. can be mix | blended with a liquid coating material as needed.

    The powdered magnetic material mixed in such a paint is a powder whose orientation is changed by a magnetic force, for example, using mica deposited with nickel, nickel, stainless steel with high iron content, iron or the like. Can do. The shape of the magnetic material may be any of a scale shape, a thin plate shape, a granular shape, and the like. On the other hand, the magnetic material has a longitudinal direction or a diameter of 1 to 50 μm, preferably 20 to 30 μm. The mixing ratio of the powdery magnetic material is preferably 1 to 30 parts by weight, particularly 10 to 20 parts by weight, based on 100 parts by weight (solid content) of the vehicle component described above.

    When a liquid paint containing such a powdered magnetic material is applied to the outer surface of the container body 11 attached to the pattern forming jig 13, the magnetic force generated from the magnet 15 attached to the mandrel 14 is generated in the liquid paint. This powdery magnetic material starts to be oriented in a liquid paint having fluidity.

  The orientation action of the powdered magnetic material is the same as that in the case where the magnetic force is not applied or the portion where the action of the magnetic force is relatively weak, as described with reference to FIG. In addition, the powdered magnetic material is randomly arranged in the liquid paint, whereas the portion where the magnet 15 is attached and the magnetic force acts is oriented along the line of magnetic force, and the magnet 15 Since the powder magnetic material is attracted and the density of the powder is increased due to the strong magnetic force in the periphery of the magnet 15, the magnetic force lines act almost perpendicularly to the coating film in the central portion of the magnet 15. Oriented to stand upright.

  Thereby, when the formed pattern coating film 12 is observed, the portion where the powdered magnetic material has a high density along the peripheral portion of the magnet 15 has a strong color of the magnetic material, while the central portion of the magnet 15 has the magnetic material. Since the light is upright, the reflected light is weakened and a gradation of blackish color is generated, and the pattern “A” appears three-dimensionally.

  After the pattern made of the magnetic material is formed on the outer surface of the container main body 11 in this way, the paint is cured before the pattern forming jig 13 is removed, and then the pattern forming jig 13 is removed from the container main body 11. To do.

  Until now, the magnet 15 has been removed from the container body 11 and then the paint is dried and cured. When the pattern forming jig 13 is moved along the outer surface of the container body 11 in this way, the magnetic material is dragged. However, in the present invention, the effect of moving the magnet 15 is avoided by curing the paint while the pattern forming jig 13 is mounted.

  The paint before the pattern forming jig 13 is removed from the container body 11 may be cured in a semi-cured state at least so that the magnetic material does not move with the movement of the magnet 15, and the paint need not be completely cured. .

  In order to cure the coating in as short a time as possible, as shown in FIG. 1C, the liquid coating is performed so that the coating is cured by a drying curing device 16 that performs heating or irradiation with ultraviolet rays or electron beams. In particular, by using an ultraviolet curable paint, it can be completely cured by irradiation with ultraviolet rays for several tens of seconds to several minutes. Since it can be completely cured by irradiation with an electron beam for 2 seconds, in order to obtain a semi-cured state, it can be cured by irradiation with ultraviolet rays or electron beams with a further shortened curing time and heated. Compared to the above, it is possible to avoid the influence of thermal deformation or the like on the surroundings of the pattern forming jig 13 or the like.

  In addition, securing such a semi-curing time hardly affects the manufacturing process of a beverage can, and can be applied to high-speed mass production as it is.

  Thus, after the pattern coating film 12 made of the magnetic material is formed and cured so that the powdery magnetic material does not move, the pattern forming jig 13 is removed from the container body 11 as shown in FIG.

  In the case of removing the pattern forming jig 13, the powdered magnetic material is cured even if the magnet 15 is moved along the outer surface of the container body 11 that is the formation surface of the pattern coating film 12. The desired pattern coating film 12 can be formed without causing problems such as the pattern coating film 12 being broken.

  Therefore, even when the removal direction of the magnet for pattern formation cannot be ensured in a direction perpendicular to the pattern coating film forming surface like a container, the powder coating magnetic material can be oriented to form the pattern coating film 12. It becomes.

  After forming the patterned coating film 12 in which the powdered magnetic material is oriented with the magnet 15 on the container body 11 in this manner, the container 10 with the patterned coating film is completed in the same manner as the conventional can manufacturing method.

  For example, printing is performed on the outer surface excluding the pattern coating film 12 of the container main body 11 on which the pattern coating film 12 is formed, or printing is performed so as to overlap the pattern coating film 12.

  Thereby, the pattern coating film 12 that looks three-dimensionally and the pattern by printing can be combined, and the design and decorativeness can be improved compared to the case of only printing.

  Furthermore, after printing as necessary, a clear paint is applied to the entire outer surface of the container body 11 so that the dry film thickness is 2 to 10 μm, and after applying this clear paint, it is transported to a hot air drying furnace or the like, By baking clear paint or the like under predetermined drying conditions, the container 10 with a patterned coating film is completed.

  Next, the manufacturing method of the container with a pattern coating film applied to the manufacturing process of a drink can is demonstrated concretely with FIGS.

  2 to 4 relate to another embodiment of the method for producing a container with a patterned coating film according to the present invention, FIG. 2 is a schematic process diagram of a part of beverage can production, and FIG. 3 is a part of beverage can production equipment. FIG. 4 is a schematic cross-sectional view showing the coating layer structure of the container at that time.

  Production of the container with a patterned coating film of the present invention, that is, formation of the patterned coating film, is performed on the upstream side of the printing process during the production process of the beverage can as shown in FIG.

  As shown in FIG. 3, the pattern coating film forming apparatus 20 of the beverage can manufacturing facility is provided with a supply mechanism 22 for a molded and trimmed two-piece can 21, and the supply mechanism 22 provides a two-piece to the pattern-forming turret 23. The can 21 is supplied.

  A large number of pattern forming jigs 13 are arranged on the pattern forming turret 23 at equal intervals around the pattern forming turret 23 so that the two-piece can 21 can be mounted from above. As described above, the mandrel 14 is configured with the magnet 15 such as the contour shape of the pattern attached thereto, and revolves while rotating along with the conveyance rotation of the pattern forming turret 23 by a mechanism (not shown).

  On the upstream side in the conveyance rotation direction around the pattern-forming turret 23, a base coating application unit that applies a base paint, for example, a dark paint to the outer surface of the two-piece can 21, as compared with a liquid paint containing a magnetic material. 24, and a magnetic paint application unit 25 for applying a liquid paint containing a powdered magnetic material, for example, a liquid paint containing a powdered magnetic material to an ultraviolet curable paint, is provided downstream thereof. These two application units 24 and 25 are constituted by, for example, a roller coater provided with an applicator roller.

  An ultraviolet irradiation device 26 for curing the pattern oriented by the magnet 15 of the pattern forming jig 13 to such an extent that the magnetic material does not move is installed on the downstream side of the liquid paint application unit 25. The ultraviolet irradiation device 26 includes a so-called metal halide lamp that irradiates ultraviolet rays.

  A transfer device 27 is provided on the downstream side in the transport rotation direction around the pattern forming turret 23 so that the two-piece can 21 on which the pattern coating film is formed is transported to the next process.

  An oven 28 that is attached to the transfer device 27 and is completely cured by reheating the paint may be provided.

  In the pattern coating film forming apparatus 20 installed in the beverage can manufacturing facility configured as described above, the two-piece can 21 formed and trimmed is supplied to the pattern forming turret 23 by the supply mechanism 22. Two-piece cans 21 are sequentially mounted so as to cover the mandrel 14 of the pattern forming jig 13 from above.

  The two-piece can 21 that is mounted on the pattern forming jig 13 and revolved while being rotated is first sent to the base coating application unit 24, and the base coating 17 is applied by a roller coater including an applicator roller. It is painted darker than the liquid paint containing the material.

  After that, the two-piece can 21 revolved while rotating and transported to the magnetic paint application unit 25 is applied with a liquid paint containing a powdered magnetic material by a roller coater provided with an applicator roller. Apply one containing a magnetic material.

  Then, the magnetic force generated from the magnet 15 attached to the mandrel 14 acts on the powdered magnetic material 18 in the liquid paint, and this powdery magnetic material starts orientation in the liquid paint having fluidity.

  As a result, as already described, the powdered magnetic material has a high density along the periphery of the magnet 15 and the color of the magnetic material is strong, while the magnetic material is upright in the center of the magnet 15. As a result, the reflected light is weakened and a gradation of blackish color is generated, and the pattern coating film 12 that appears three-dimensionally is formed.

  After that, the two-piece can 21 on which the three-dimensional pattern coating film 12 is formed is revolved and conveyed while rotating by a pattern forming turret 23, and ultraviolet rays are irradiated from a metal halide lamp or the like by a downstream ultraviolet irradiation device 26. The

  As a result, the three-dimensional pattern coating film oriented by the magnet 15 of the pattern forming jig 13 is dried and cured, and at least cured to the extent that the magnetic material does not move due to irradiation with ultraviolet rays. The curing with ultraviolet rays may be performed by irradiating with ultraviolet rays for a very short time, and may be performed as it is without changing the production rate of a normal two-piece can or may be slightly changed. Further, if an electron beam curable resin is used as the liquid resin, the resin can be cured in a shorter time than the ultraviolet curable resin, and the production speed can be further increased.

  The two-piece can 21 with the three-dimensional pattern coating film thus cured is removed from the mandrel 14 of the pattern forming turret 23 and transferred to the transfer device 27.

  At this time, the magnet 15 moves not along the direction perpendicular to the pattern coating film of the magnetic material but along the pattern coating film, but the pattern coating film itself is already cured so that at least the magnetic material does not move. Therefore, the pattern coating film does not collapse and the desired pattern coating film is maintained as it is.

  Then, while being transferred by the transfer device 27, the patterned coating film is reheated in the attached oven 28 to be completely cured.

  Note that the complete curing of the pattern coating film by reheating is not limited to being performed during the transfer of the transfer device 27 but may be performed in a separate process.

  In this manner, a powdery magnetic material is oriented on the outer surface of the two-piece can 21 with a magnet to complete a pattern coating that looks three-dimensional.

  Thereafter, in order to complete the two-piece can 21, necessary printing is performed in the next step.

  This printing is performed in the same manner as the conventional printing on the two-piece can 21. For the pattern coating film, printing is performed on the periphery of the pattern coating film, or it is superimposed on the pattern coating film and the printing is made transparent. The pattern coating is printed so that it can be seen.

  Further, after the finishing varnish 19 is applied to the entire two-piece can 21, it is sent to an oven and baked to complete a container with a pattern coating film.

  In addition, even when a pattern coating film made of a magnetic material is formed in the production facility of the two-piece can 21, when it is not necessary to perform high-speed mass production like a beverage can, an ultraviolet curing is used as a liquid paint containing the magnetic material. Instead of the resin, a thermosetting resin or the like may be used, and it may be heated and dried to the extent that the magnetic material does not move by heating in an oven or the like attached to the pattern forming jig 13 or may be completely cured.

  Then, the printing performed thereafter may be performed in the same manner as described above.

  As described above, even if the magnet cannot be retracted in a direction perpendicular to the pattern coating film in a container such as a can, the pattern coating film in which the pattern forming jig to be mounted in the container is oriented with the magnet By drying and curing the magnet before moving the magnet, the magnet can be moved and taken out without breaking the pattern coating, and the pattern coating with magnetic material can be applied to the outer surface of the container with a small bottom cross-sectional area. Can be formed.

  In addition, it is only necessary to provide one process before the printing process on the equipment, and it is possible to cope with the existing equipment without significant modification.

It is explanatory drawing of the general | schematic process at the time of applying to one embodiment of the manufacturing method of the container with a pattern coating film of this invention, and applying to a drink can as a container. It concerns on one Embodiment of the manufacturing method of the container with a pattern coating film of this invention, and is a schematic process drawing of a part of beverage can manufacture. It concerns on other one Embodiment of the manufacturing method of the container with a pattern coating film of this invention, and is a schematic layout drawing of a part of beverage can manufacturing equipment. It is a cross-sectional schematic diagram which shows the coating-film layer structure of the container concerning other one Embodiment of the manufacturing method of the container with a pattern coating film of this invention. It is process drawing of the method of forming a pattern coating film in the conventional plate-shaped to-be-coated object, and arrangement | positioning drawings, such as a magnet. It is principle explanatory drawing in the case of orienting the powdery magnetic material contained in the liquid coating material with a magnet. It is process drawing in the case of forming a pattern coating film in a container using the method of forming a pattern coating film in the conventional plate-shaped to-be-coated object.

Explanation of symbols

W Object 1 Spacer 2, 6 Magnet 3 Powder magnetic material 4 Base paint containing powder magnetic material 5 Clear paint 7 Mandrel 8 Container 10 Container with pattern coating 11 Container body 12 Pattern coating 13 Pattern forming jig 14 Mandrel DESCRIPTION OF SYMBOLS 15 Magnet 16 Drying / curing apparatus 20 Pattern coating film forming apparatus of beverage can manufacturing equipment 21 Two-piece can 22 Supply mechanism 23 Pattern forming turret 24 Base coating application unit 25 Magnetic coating application unit 26 Ultraviolet irradiation apparatus 27 Transfer apparatus

Claims (10)

A container with a pattern coating film, characterized in that a liquid paint containing a powdery magnetic material is formed on the surface of the container with a pattern in which the magnetic material is oriented by a magnetic field. The container with a pattern coating film according to claim 1, wherein the liquid paint is made of an ultraviolet curable resin or an electron beam curable resin. The container with a pattern coating film according to claim 1 or 2, wherein printing is performed on the outer surface of the pattern made of the magnetic material or on the surface of the container so as to overlap the pattern. The said container was comprised with the can of the nonmagnetic material, The container with a pattern coating film in any one of Claims 1-3 characterized by the above-mentioned. A liquid paint containing a powdered magnetic material is applied to the surface of the container, and a pattern forming jig equipped with a magnet corresponding to the pattern is inserted into the container before or after the liquid paint is applied. A method for producing a container with a pattern coating film, wherein the magnetic material is oriented by a magnetic field of a forming jig, cured before the pattern forming jig is removed, and then the pattern forming jig is removed. 6. The pattern according to claim 5, wherein the liquid paint is composed of an ultraviolet curable resin or an electron beam curable resin, and the magnetic material is oriented and then cured by irradiation with ultraviolet rays or an electron beam. A method for producing a container with a coating film. The method for producing a container with a patterned coating film according to claim 5 or 6, wherein the magnetic material is cured after orientation so that at least the powdery magnetic material does not move. The method for manufacturing a container with a pattern coating film according to any one of claims 5 to 7, wherein the pattern forming jig is re-cured after being removed from the container. The method for producing a container with a pattern coating film according to any one of claims 5 to 8, wherein printing is performed on the outer surface of the pattern made of the magnetic material or on the surface of the container so as to overlap the pattern. The said container was made into the can of a nonmagnetic material, The manufacturing method of the container with a pattern coating film in any one of Claims 5-9 characterized by the above-mentioned.

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