JP2008126264A - Device for processing can body, its inside roll and outside roll, and method of manufacturing metal can on which unevenness are processed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the variation of an emboss design by making effective use of a die. <P>SOLUTION: In the device for processing a can body with which projecting patterns 35a, 35b and recessed patterns 36a-36c are formed on the side wall of the body part 41b by holding the side wall of the can body 41a of a metal can 10a between an inside roll 11 and an outside roll 12 and performing pressure bonding, the inside roll 11 and the outside roll 12 are respectively composed by being divided into a plurality of segmental dies 21a, 21b, 22a, 22c, 23a, 23b, 23c, 24a, 24b and at least one of the segmental dies 21a, 21b, 22a, 22c of the inside roll 11 are projecting segmental dies 21a, 21b on the outside surface of which projecting engravings are formed and at least one of the segmental dies 23a, 23b, 23c, 24a, 24b of the outside roll 12 are projecting segmental dies 23a-23c on the outside surface of which projecting engravings 32 are formed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a can body processing apparatus for forming a concavo-convex pattern on a body side wall of a metal can, an inner roll and an outer roll used in the can body processing apparatus, and a method for manufacturing a concavo-convex metal can.

When manufacturing conventional metal cans with convex or concave patterns, the can body is processed by pressing the can body between the inner roll and the corresponding outer roll. It was. A convex mold was arranged on the outer roll, and a concave mold was arranged on the inner roll. Or a convex metal mold | die is arrange | positioned at the outer side roll, and the rubber roll which coat | covered the outer surface with rubber | gum was arrange | positioned at the inner side roll (for example, refer patent document 1). On the other hand, in a pattern paper embossing apparatus, a rubber roll is used as a receiving roll (see, for example, Patent Document 2).
Japanese Utility Model Publication No. 02-04353 JP 2000-127268 A

  In the conventional embossing, molds for the inner roll and the outer roll are produced for each design of the metal can, so that it is necessary to separately produce a new mold even if the design is slightly changed. For this reason, in order to increase the variation of the embossed design, the cost of the mold was required.

  An object of this invention is to increase the variation of an embossing design by utilizing a metal mold | die effectively.

  In the present invention, an inner roll and an outer roll that press-contact a body side wall of a metal can are configured by a plurality of split molds, and convex sculptures are formed on both the inner roll and the outer roll. The mold is arranged.

  Specifically, the can body processing apparatus according to the present invention has a convex pattern and a concave shape on the body side wall by pressing the body side wall of the metal can between the inner roll and the outer roll. In the can body processing apparatus for forming a pattern, the inner roll and the outer roll are divided into a plurality of split molds, and at least one of the split molds of the inner roll has a convex sculpture formed on the outer surface. And at least one of the split molds of the outer roll is a split mold in which a convex sculpture is formed on the outer surface.

  In the can body processing apparatus according to the present invention, among the split molds of the inner roll, the split mold that sandwiches the barrel side wall with the convex split mold of the outer roll is combined with the convex split mold of the outer roll. A concave split mold having a surface and / or a split mold whose outer surface is covered with an elastic body, and among the split molds of the outer roll, between the convex split mold of the inner roll and the barrel side wall It is preferable that the split mold sandwiching is a concave split mold having a mating surface with the convex split mold of the inner roll and / or a split mold whose outer surface is covered with an elastic body. Since the corresponding surfaces of the inner roll and the outer roll are a convex split type and a concave split type, the convex pattern or the concave pattern formed on the barrel side wall of the metal can can be clarified. Moreover, a split type | mold can be shared because the surface corresponding to an inner side roll and an outer side roll is a convex split type and a split type.

  In the can body processing apparatus according to the present invention, the inner roll is provided with a concave split type and / or a split mold for each convex split mold of the outer roll, and the outer roll is a concave split type and / or a split split. It is preferable that a mold is provided for each convex mold of the inner roll. Since the split mold of the outer roll and the split mold of the inner roll are combined, the convex engraving formed on the outer surface of the convex split mold can be transferred to the metal can under the optimum conditions. Further, it is possible to reduce alignment lines formed on the body side wall of the metal can when the body side wall of the metal can is pressed.

  In the can body processing apparatus according to the present invention, it is preferable that the split mold of the inner roll and the split mold of the outer roll are laterally divided in a direction crossing the main axis of the barrel portion of the metal can. Since the split mold of the inner roll and the split mold of the outer roll are laterally divided, the arrangement and position of the convex pattern and the concave pattern formed on the side wall of the metal can can be changed. Can be swapped along the vertical direction.

  Moreover, it is preferable that the split mold of the said inner roll and the split mold of the said outer roll are longitudinally divided in the direction which passes along the main axis | shaft of the trunk | drum of the said metal can. Since the split mold of the inner roll and the split mold of the outer roll are vertically divided, the arrangement and position of the convex pattern and the concave pattern formed on the side wall of the body of the metal can It can be replaced along the waistline direction.

  Moreover, it is preferable that the lattice division is performed in a direction crossing the main axis of the body portion of the metal can and a direction passing through the main axis of the body portion of the metal can. By dividing the inner roll split mold and outer roll split mold into grids, the arrangement and position of convex patterns and concave patterns formed on the side wall of the body of the metal can can be freely controlled in units of split molds. Can be replaced.

  The inner roll according to the present invention is a can body process for forming a convex pattern and a concave pattern on the body side wall by sandwiching and pressing the body side wall of the metal can between the inner roll and the outer roll. In the inner roll of the apparatus, a convex mold in which convex engraving is formed on the outer surface, a concave mold in which concave engraving is formed on the outer surface, and / or the outer surface is covered with an elastic body. A split type.

  The outer roll according to the present invention is a can body process for forming a convex pattern and a concave pattern on the body side wall by sandwiching and pressing the body side wall of the metal can between the inner roll and the outer roll. In the outer roll of the apparatus, a convex mold in which convex engraving is formed on the outer surface, a concave mold in which concave engraving is formed on the outer surface, and / or the outer surface is covered with an elastic body. A split type.

  The method for manufacturing a metal can subjected to uneven processing according to the present invention is divided into a plurality of split molds, and at least one of the split molds is a convex split mold in which convex sculptures are formed on the outer surface. An inner roll is inserted into the inside of the metal can and divided into a plurality of split molds, and at least one of the split molds is an outer roll that is a convex split mold in which convex sculpture is formed on the outer surface. A convex pattern and a concave pattern are formed on the side wall of the body by press-contacting the side wall of the metal can with the inner roll.

  Since the embossed design can be changed by combining a plurality of split molds and their arrangement, it is possible to increase the number of variations of the embossed design by effectively using the mold. Moreover, since both the convex pattern and the concave pattern can be formed on the side wall of the body portion of the metal can by a single process, variations in the embossed design can be further increased. Further, since the body of the metal can can be made more three-dimensional, the body of the metal can can be easily held.

  Embodiments of the present invention will be described with reference to the accompanying drawings. The embodiment described below is an example of the configuration of the present invention, and the present invention is not limited to the following embodiment. Drawing 1 is a mimetic diagram showing the 1st form of a can body processing device. The can body processing apparatus sandwiches and presses the side wall of the body portion 41a of the metal can 10a between the inner roll 11 and the outer roll 12, so that convex patterns 35a and 35b and concave shapes are formed on the side wall of the body portion 41a. Patterns 36a, 36b, and 36c are formed. The metal can 10b shows a state after the convex patterns 35a, 35b and the concave patterns 36a, 36b, 36c are formed on the metal can 10a.

  The metal can 10b accommodates products including beverages such as carbonated beverages, soft drinks, beer or sparkling wine. The metal can 10a is made of a metal material such as aluminum or steel, for example. The metal material is, for example, a plated steel plate such as Sn plating or Sn / Ni plating, or a surface treated steel plate such as an electrolytic chromic acid treated steel plate. A synthetic resin may be coated on the surface of the metal can 10a or 10b.

  The metal can 10b is, for example, a two-piece can or a three-piece can. When the metal can 10b is a two-piece can, the shape of the metal can 10a is a cylindrical shape as shown in FIG. When the metal can 10b is a three-piece can, the shape of the metal can 10a may be a cylindrical shape as shown in FIG. 1 or a flat plate shape.

  The inner roll 11 and the outer roll 12 are divided into a plurality of split molds. At least one of the split molds of the inner roll 11 is convex split molds 21a and 21b in which convex sculptures 31 are formed on the outer surface. Further, at least one of the split molds of the outer roll 12 is a convex split mold 23a, 23b, 23c having a convex sculpture 32 formed on the outer surface. In FIG. 1, the inner roll 11 is divided into five split molds, two split molds 21a, 21b and three split molds 22a, 22b, 22c, and the outer roll 12 is divided into three convex split molds 23a, 23b. , 23c and two split molds 24a and 24b, an example is shown that is divided into five split molds. Although the number of the convex molds 21a and 21b arranged on the inner roll 11 is two in FIG. 1, it may be one or three or more. The number of the convex molds 23a, 23b, and 23c arranged on the outer roll 12 is 3 in FIG. 1, but may be 2 or 4 or more.

  The split mold of the inner roll 11 and the split mold of the outer roll 12 have a corresponding relationship for forming an emboss. For example, the split mold 21a of the inner roll 11 corresponds to the split mold 24a of the outer roll 12, and the convex split mold 21a and the split mold 24a press the side wall of the body portion 41a of the metal can 10a. A convex pattern 35a is formed on the side wall of the body 41a of the metal can 10a. The split mold 21b of the inner roll 11 corresponds to the split mold 24b of the outer roll 12, and the convex mold 21b and the split mold 24b press the side wall of the body portion 41a of the metal can 10a, so that the metal can A convex pattern 35b is formed on the side wall of the body portion 41a of 10a. The split mold 23a of the outer roll 12 corresponds to the split mold 22a of the inner roll 11, and the convex can mold 23a and the split mold 22a are pressed against the side wall of the body portion 41a of the metal can 10a. A concave pattern 36a is formed on the side wall of the body portion 41a of 10a. The split mold 23b of the outer roll 12 corresponds to the split mold 22b of the inner roll 11, and the convex can mold 23b and the split mold 22b press the side wall of the body portion 41a of the metal can 10a so that the metal can A concave pattern 36b is formed on the side wall of the body portion 41a of 10a. The split mold 23c of the inner roll 11 corresponds to the convex mold 23c of the outer roll 12, and the metal can can be obtained by pressing the side wall of the body portion 41a of the metal can 10a with the convex mold 23c and the split mold 22c. A concave pattern 36c is formed on the side wall of the body portion 41a of 10a.

  That is, among the split molds of the inner roll 11, the split mold that sandwiches the side wall of the body 41a of the metal can 10a between the convex split molds 23a, 23b, and 23c of the outer roll 12, for example, as shown in FIG. The split molds 22a, 22b, and 22c whose outer surfaces are covered with an elastic body. Of the split molds of the inner roll 11, the split molds that sandwich the side wall of the body portion 41a of the metal can 10a between the split molds 23a, 23b, and 23c of the outer roll 12 are the split molds 23a and 23b of the outer roll 12. , 23c having a mating surface with 23c. For example, when the convex sculpture 32 of the convex mold 23a of the outer roll 12 is preferably a pattern that makes the concave pattern 36a clear, a concave mold (not shown) having a mating surface with the convex mold 23a. ) Is provided on the inner roll 11, a clear concave pattern 36 a can be formed. Of the split molds of the inner roll 11, the split mold in which the side wall of the body 41a of the metal can 10a is sandwiched between the convex split molds 23a, 23b, and 23c of the outer roll 12, the outer surface is covered with an elastic body. A combination of a split mold and a concave split mold (not shown) having a mating surface with the convex split mold 23a, the convex split mold 23b, or the convex split mold 23c of the outer roll 12 may be used.

  Furthermore, among the split molds of the inner roll 11, the split mold that sandwiches the side wall of the body portion 41a of the metal can 10a between the split molds 24a and 24b of the outer roll 12 is, for example, as shown in FIG. Convex split molds 21a and 21b having convex sculptures 31 formed on the top. Here, the height of the convex engravings 31 of the convex molds 21a and 21b is such that the convex engravings 32 of the convex molds 23a, 23b, and 23c of the outer roll 12 are provided in order to facilitate the demolding of the inner roll 11. It is preferable that the height is lower. The height of the convex sculpture 31 is a height at which the inner roll 11 can be removed, and is based on the convex patterns 35a and 35b and the concave patterns 36a, 36b, and 36c. Preferably there is. Even a fine pattern can be clearly formed. Of the split molds of the inner roll 11, the split mold in which the side wall of the body portion 41 a of the metal can 10 a is sandwiched between the split molds 24 a and 24 b of the outer roll 12 is a split mold whose outer surface is covered with an elastic body. (Not shown) may be used.

  Of the split molds of the inner roll 11, the split mold that sandwiches the side wall of the body portion 41a of the metal can 10a between the convex split molds 23a, 23b, and 23c of the outer roll 12 is a convex sculpture 31 on the outer surface. It is preferable that it is not a convex split type. Damage to the side walls of the convex molds 23a, 23b, 23c and the body 41a of the metal can 10a is prevented. Of the split molds of the inner roll 11, the split mold that sandwiches the side wall of the barrel 41a of the metal can 10a with the concave split mold (not shown) of the outer roll 12 is the side wall of the barrel 41a of the metal can 10a. It is preferable that it is not a concave split type (not shown) so that a streak does not enter.

  Of the split molds of the outer roll 12, the split mold sandwiching the side wall of the body portion 41a of the metal can 10a between the convex split molds 21a and 21b of the inner roll 11 has an elastic outer surface as shown in FIG. The split molds 24a and 24b covered with the body. Of the split molds of the outer roll 12, the split mold that sandwiches the side wall of the body portion 41a of the metal can 10a between the split molds 21a and 21b of the inner roll 11 is the same as the split molds 21a and 21b of the inner roll 11. A concave mold (not shown) having a mating surface may be used. For example, when the convex sculpture 31 of the convex split mold 21a of the inner roll 11 is a pattern that preferably makes the convex pattern 35a clear, the concave split mold (non-flat) having a mating surface with the convex split mold 21a. By providing the outer roll 12 with an illustration), a clear convex pattern 35a can be formed. Of the split molds of the outer roll 12, the split mold in which the side wall of the body portion 41a of the metal can 10a is sandwiched between the convex split molds 21a and 21b of the inner roll 11, and the outer surface is covered with an elastic body. A combination of a split mold and a concave split mold (not shown) having a mating surface with the convex split mold 21a or the convex split mold 21b of the inner roll 11 may be used.

  Furthermore, among the split molds of the outer roll 12, the split mold that sandwiches the side wall of the body 41a of the metal can 10a between the split molds 22a, 22b, and 22c of the inner roll 11 is, for example, as shown in FIG. The convex molds 23a, 23b, and 23c have convex sculptures 32 formed on the outer surface. Of the split molds of the outer roll 12, the split mold in which the side wall of the body 41a of the metal can 10a is sandwiched between the split molds 22a, 22b, and 22c of the inner roll 11 is a receiver whose outer surface is covered with an elastic body. A split mold (not shown) may be used. Neither a convex pattern nor a concave pattern is formed.

  Of the split molds of the outer roll 12, the split mold sandwiching the side wall of the body portion 41a of the metal can 10a between the convex split molds 21a and 21b of the inner roll 11 has a convex sculpture 32 formed on the outer surface. It is preferable that the convex type is not used. Damage to the side walls of the convex molds 21a and 21b and the body 41a of the metal can 10a is prevented. Of the split molds of the outer roll 12, the split mold that sandwiches the side wall of the body portion 41a of the metal can 10a with the concave mold (not shown) of the inner roll 11 is the side wall of the body portion 41a of the metal can 10a. It is preferable that it is not a concave split type (not shown) so that a streak does not enter.

  The inner roll 11 preferably includes split molds 22a, 22b, and 22c for each of the convex split molds 23a, 23b, and 23c of the outer roll 12. The outer roll 12 is preferably provided with split molds 24 a and 24 b for each of the convex split molds 21 a and 21 b of the inner roll 11. For example, the inner roll 11 includes a split mold 22a that has a one-to-one correspondence with the convex split mold 23a. The inner roll 11 may be provided with two or more split molds for one convex split mold 23a. However, if the convex split mold 23a and the split mold 22a correspond one-to-one, It is possible to reduce the number in which the boundary line between the split molds appears as a streak along the side wall of the body portion 41a of the metal can 10a. In addition, the boundary line between the split mold 22a and the convex split mold 21a and the boundary line between the convex split mold 23a and the split mold 24a overlap at positions corresponding to each other, so that the body 41a of the metal can 10a The number of alignment bars appearing on the side wall can be reduced. Also, if the split mold 22a is a split mold dedicated to the convex mold 23a, the elastic material, thickness or hardness of the elastic body covered on the outer surface of the split mold 22a can be changed to the engraving of the convex mold 23a. 32 can be optimized.

  The convex molds 21a and 21b and the split molds 22a, 22b, and 22c of the inner roll 11 have the same height along the main shaft 101 direction of the body 41a of the metal can 10a in FIG. The heights may be different from each other. Moreover, the convex molds 23a, 23b, 23c and the split molds 24a, 24b of the outer roll 12 have the same height along the main shaft 101 direction of the body 41a of the metal can 10a in FIG. However, the heights may be different from each other. For example, when the convex pattern 35a expresses a character, the convex mold 21a of the inner roll 11 is a character so that a line does not enter in the character formed on the side wall of the body 41a of the metal can 10a. It is preferable to use a split mold with a shape that can accommodate the whole. Moreover, it is preferable that the split mold has a height that is an integral multiple of the unit height. For example, when the convex split mold 21a has a height higher than the convex split mold 21b, the height of the convex split mold 21a is preferably an integral multiple of the height of the convex split mold 21b. Increased freedom of combination.

  As shown in FIG. 1, the split mold of the inner roll 11 and the split mold of the outer roll 12 are horizontally divided in the direction crossing the main shaft 101 of the barrel 41a of the metal can 10a, or the barrel of the metal can 10a. It is vertically divided in a direction passing through the main shaft 101 of 41a, or is divided into a direction crossing the main shaft 101 of the body 41a of the metal can 10a and a direction passing through the main shaft 101 of the body 41a of the metal can 10a. It is preferable.

  As shown in FIG. 1, when the inner roll 11 and the outer roll 12 are laterally divided, the convex patterns 35a, 35b and the concave patterns 36a, 36b, 36c are converted into the main axis of the body 41a of the metal can 10a. They can be alternately formed along the 101 direction. Further, if the convex mold 21a and the convex mold 21b of the inner roll 11 are interchanged, the convex pattern 35a and the convex pattern 35b can be formed into the body 41a of the metal can 10a without newly manufacturing the inner roll 11. Cans having a design alternated along the direction of the main shaft 101 can be produced. Moreover, if the convex mold 23a and the convex mold 23b of the outer roll 12 are exchanged, the concave pattern 36a and the concave pattern 36b can be converted into the main axis of the body 41a of the metal can 10a without newly manufacturing the outer roll 12. Cans with a design that alternates along the 101 direction can be produced. Here, it is not necessary to replace the split mold 22a corresponding to the convex split mold 23a and the split mold 22b corresponding to the convex split mold 23b. When the split mold 22a is a concave split mold (not shown), the concave split mold (not shown) and the split mold 22b are interchanged. For example, the inner roll 11 and the outer roll 12 are divided perpendicularly to the direction of the main shaft 101 of the body 41a of the metal can 10a. The shape of the split mold of the inner roll 11 and the shape of the split mold of the outer roll 12 are, for example, annular as shown in FIG. The peripheral end of the split mold of the inner roll 11 and the peripheral end of the split mold of the outer roll 12 are preferably in contact with the split molds disposed adjacent to each other. The surface where the adjacent split molds contact each other is not limited to a flat surface, and may be a curved surface.

  Drawing 2 is a mimetic diagram showing the 2nd form of a can body processing device. In the can body processing apparatus shown in FIG. 2, the convex molds 21a, 21b, 21c and the split molds 22a, 22b of the inner roll 11 and the convex molds 23a, 23b, 23c, 23d, 23e and the split mold of the outer roll 12 are used. 24a, 24b, 24c, 24d, and 24e are vertically divided in a direction passing through the main shaft 101 of the body portion 41a of the metal can 10a. Here, the direction passing through the main shaft 101 of the body 41a of the metal can 10a is, for example, a direction parallel to the main shaft 101 of the body 41a of the metal can 10a. In this case, the cut surfaces of the split molds have a straight line parallel to the main axis 101 of the body portion 41a of the metal can 10a in the cut surface. Since the split mold of the inner roll 11 and the split mold of the outer roll 12 are vertically divided, the convex patterns 35a, 35b, and 35c and the concave patterns 36a, 36b, and 36c are converted into the body 41a of the metal can 10a. Can be alternately formed along the circumference of the body. Further, if the convex mold 21a and the convex mold 21b of the inner roll 11 are interchanged, the convex pattern 35a and the convex pattern 35b can be formed into the body 41a of the metal can 10a without newly manufacturing the inner roll 11. Cans with a design that alternates along the torso direction can be made. Further, if the convex mold 23a and the convex mold 23b of the outer roll 12 are exchanged, the concave pattern 36a and the concave pattern 36b can be formed on the trunk 41a of the metal can 10a without newly manufacturing the outer roll 12. Cans with alternate designs along the circumference can be produced. Here, it is not necessary to replace the split mold 22a corresponding to the convex split mold 23a and the split mold 22b corresponding to the convex split mold 23b. When the split mold 22a is a concave split mold (not shown), the concave split mold (not shown) and the split mold 22b are interchanged. The shapes of the split mold of the inner roll 11 and the split mold of the outer roll 12 are, for example, columnar shapes as shown in FIG. The peripheral end of the split mold of the inner roll 11 and the peripheral end of the split mold of the outer roll 12 are preferably in contact with the split molds disposed adjacent to each other. The surface where the adjacent split molds contact each other is not limited to a flat surface, and may be a curved surface.

  When the split mold of the inner roll 11 and the split mold of the outer roll 12 are grid-divided in a direction that traverses the main axis 101 of the barrel 41a of the metal can 10a and a direction that passes through the main axis 101 of the barrel 41a of the metal can 10a, Convex patterns and concave patterns can be arranged in a grid pattern. Further, the split mold of the inner roll 11 and the split mold of the outer roll 12 may have different division directions depending on the position of the body portion 41a of the metal can 10a. For example, if the upper end and the lower end of the body 41a of the metal can 10a are horizontally divided and the center of the body 41a of the metal can 10a is vertically divided, the metal can 10b can be easily held.

  The material of the outer surfaces of the convex molds 21a, 21b of the inner roll 11 and the convex molds 23a, 23b, 23c of the outer roll 12 shown in FIG. 1 is preferably hard and wear resistant. 21a, 21b and the convex molds 23a, 23b, 23c are preferably made of metal, cemented carbide, ceramics, or hard resin.

  The thicknesses of the elastic bodies of the split molds 22a, 22b and 22c of the inner roll 11 and the elastic bodies of the split molds 24a and 24b of the outer roll 12 are preferably 0.5 mm or greater and 2.0 mm or less. Even a fine pattern can be clearly formed. The core disposed inside the elastic body is preferably a hard metal material, such as iron, molybdenum, tungsten, or an alloy of chromium and iron. The alloy is, for example, stainless steel or die steel.

  The elastic material constituting the elastic body is, for example, rubber or synthetic resin. The elastic material includes foamed rubber or synthetic resin. Examples of rubber include general-purpose rubber, special rubber, and thermoplastic elastomer. General-purpose rubber is, for example, synthetic rubber or natural rubber. Examples of the synthetic rubber include polyisoprene rubber (IR), butadiene rubber, styrene-butadiene rubber, butyl rubber, and ethylene-propylene rubber. The special rubber is a rubber having special properties such as oil resistance and chemical resistance, and examples thereof include chloroprene rubber, silicone rubber, acrylic rubber, and fluorine rubber. Examples of the thermoplastic elastomer include styrene, olefin, vinyl chloride, urethane, ester, and polyamide. Specific examples of the thermoplastic elastomer include a styrene-diene copolymer elastomer and a hydrogenated product thereof, an α-olefin copolymer elastomer having 3 or more ethylene-carbon atoms, and an α-olefin-polyene system having 3 ethylene or more carbon atoms. There are copolymer elastomers and hydrogenated products thereof, ethylene-unsaturated carboxylic acid-α, β-unsaturated carboxylic acid ester copolymer elastomers, and acrylonitrile copolymer elastomers. An elastic material having high wear resistance and elastic recovery is preferable, and for example, nitrile rubber and urethane rubber are preferable.

  The synthetic resin is a thermosetting resin or a thermoplastic resin. Thermoplastic resins include polystyrene, syndiotactic polystyrene, high density polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, hard polyvinyl chloride, acrylic resin, ABS resin, aliphatic polyamide resin, polyethylene terephthalate, poly There are butylene terephthalate, polyoxymethylene, polycarbonate, polyarylate, polysulfone, polyethersulfone, polyetheretherketone or polyphenylene sulfide, or a copolymer or blend thereof. Examples of the thermosetting resin include polyurethane resin, phenol resin, unsaturated polyester, diallyl phthalate resin, vinyl ester resin, epoxy resin, urea resin, melamine resin, polyimide resin, polyamideimide resin, acrylic resin, or these There are combinations. Two or more of the aforementioned rubbers or synthetic resins may be included. Moreover, the additive may be contained. Examples of the additive include a plasticizer, a dispersant, and a reinforcing agent. By adding a plasticizer, it can be changed into an elastic material.

  The elastic body preferably has a hardness defined by the international rubber hardness M method of JIS K 6253: 1997 “Method for testing hardness of vulcanized rubber and thermoplastic rubber” of 60 or more and 95 or less. This hardness is not limited to rubber or synthetic resin, but may be foamed rubber or synthetic resin. The convex patterns 35a, 35b or the concave patterns 36a, 36b, 36c formed on the side wall of the body portion 41a of the metal can 10a can be made clearer. When the hardness of the elastic body is less than 60, the side wall of the body portion 41a of the metal can 10a is easily broken. On the other hand, when the hardness of the elastic body exceeds 95, the convex patterns 35a, 35b or the concave patterns 36a, 36b, 36c may not be formed on the side wall of the body 41a of the metal can 10a. Furthermore, the hardness of the elastic body is preferably 70 or more and 80 or less. Hereinafter, the hardness of the elastic body refers to the hardness specified in the international rubber hardness M method of JIS K 6253: 1997 “Hardness test method of vulcanized rubber and thermoplastic rubber”.

  The concave mold (not shown) of the inner roll 11 and the concave mold (not shown) of the outer roll 12 are the same as the convex molds 21a, 21b of the inner roll 11 and the convex molds 23a, 23b, 23c of the outer roll 12. It is preferably hard and wear-resistant, and is preferably made of metal, cemented carbide, ceramics, or hard resin.

  The manufacturing method of the metal can processed into the unevenness will be described with reference to FIG. The split mold is selected in accordance with the pattern formed on the side wall of the body 41a of the metal can 10a. For example, the convex split molds 21a and 21b of the inner roll 11 are selected according to the convex patterns 35a and 35b formed on the side wall of the body portion 41a of the metal can 10a. The split molds 24a and 24b of the outer roll 12 are selected. The convex molds 23a, 23b, and 23c of the outer roll 12 are selected according to the concave patterns 36a, 36b, and 36c formed on the side wall of the body portion 41a of the metal can 10a. The split molds 22a, 22b, 22c of the inner roll 11 are selected.

  Here, in FIG. 3, the schematic diagram which shows an example of the convex split type and split type of an inner roll, and the convex split type and split type of an outer roll is shown. Inner roll convex split mold 21a and outer roll split mold 24a, inner roll convex split mold 21b and outer roll split mold 24b, inner roll convex split mold 21c and outer roll split mold 24c, outer roll The convex split mold 23a and the inner roll split mold 22a, the outer roll convex split mold 23b and the inner roll split mold 22b, and the outer roll convex split mold 23c and the inner roll split mold 22c correspond to each other. The split type corresponding to each convex split type is selected. By replacing the combination of the inner roll convex mold 21a and the outer roll split mold 24a with the inner roll split mold 22a and the outer roll convex mold 23a, the side wall of the body portion of the metal can The pattern to be formed can be changed from a convex pattern to a concave pattern. Further, when the inner roll convex mold 21a and the inner roll convex mold 21b are arranged side by side, the arrangement of the inner roll convex mold 21a and the inner roll convex mold 21b can be changed, so that a metal can The pattern formed on the side wall of the body portion can be replaced. Further, in the case of increasing the distance between the inner roll convex mold 21a and the inner roll convex mold 21b, the inner roll split mold is provided between the inner roll convex mold 21a and the inner roll convex mold 21b. Insert 22c. Outer roll split mold 24c is selected as a split mold to be arranged at a position corresponding to inner roll split mold 22c. By selecting the split mold 22c for the inner roll and the split mold 24c for the outer roll, a region where neither a convex pattern nor a concave pattern is formed can be provided on the side wall of the body portion of the metal can. Thus, the inner roll convex molds 21a, 21b, 21c, the inner roll split molds 22a, 22b, 22c, the outer roll convex split molds 23a, 23b, 23c, the outer roll split molds 24a, 24b, By combining the sequences of 24c, various designs can be expressed using the split mold effectively.

  Next, as shown in FIG. 1, the inner roll 11 is assembled so that the split mold 22a, the convex mold 21a, the split mold 22b, the convex mold 21b, and the split mold 22c are arranged in this order. The outer roll 12 is assembled so that the convex mold 23a, the split mold 24a, the convex mold 23b, the split mold 24b, and the convex mold 23c are arranged in this order. Since the split mold of the inner roll 11 and the split mold of the outer roll 12 are laterally divided, the cores of the inner roll 11 and the outer roll 12 can be easily assembled.

  The inner roll 11 is inserted inside the barrel 41a of the metal can 10a, and the side wall of the barrel 41a of the metal can 10a is sandwiched between the outer roll 12 and the inner roll 11 and pressed. Since the convex molds 21a, 21b of the inner roll 11 and the convex molds 23a, 23b, 23c of the outer roll 12 are pressed against the side wall of the body 41a of the metal can 10a, the convex patterns 35a, 35b and concave The patterns 36a, 36b, and 36c can be formed at a time. Since the barrel 41b of the metal can 10b can be made more three-dimensional, the barrel 41b of the metal can 10b can be easily held.

It is a schematic diagram which shows the 1st form of a can body processing apparatus. It is a schematic diagram which shows the 2nd form of a can body processing apparatus. It is a schematic diagram which shows an example of the convex split type and split type of an inner roll, and the convex split type and split type of an outer roll.

Explanation of symbols

10a, 10b Metal can 11 Inner roll 12 Outer roll 21a, 21b Inner roll convex mold 22a, 22b, 22c Inner roll split mold 23a, 23b, 23c Outer roll convex mold 24a, 24b Outer roll split Mold 31 Convex sculpture formed on the outer surface of the split mold of the inner roll 32 Convex sculpture formed on the outer surface of the split mold of the outer roll 35a, 35b On the side wall of the body of the metal can Convex patterns formed 36a, 36b, 36c Concave patterns 41a, 41b formed on the side wall of the metal can body 101 Main body of the metal can body 101

Claims (7)

In the can body processing apparatus for forming a convex pattern and a concave pattern on the body side wall by sandwiching and pressing the body side wall of the metal can between the inner roll and the outer roll,
The inner roll and the outer roll are divided into a plurality of split molds,
At least one of the split molds of the inner roll is a convex split mold in which a convex sculpture is formed on the outer surface,
At least one of the split molds of the outer roll is a convex split mold in which convex sculptures are formed on the outer surface. Of the split molds of the inner roll, the split mold that sandwiches the body side wall with the convex split mold of the outer roll is a concave split mold having a mating surface with the convex split mold of the outer roll, and / or , A split mold whose outer surface is covered with an elastic body,
Of the split molds of the outer roll, the split mold that sandwiches the body side wall with the convex split mold of the inner roll is a concave split mold having a mating surface with the convex split mold of the inner roll, and / or The can body processing apparatus according to claim 1, wherein the outer surface is a split type covered with an elastic body. The inner roll has a concave mold and / or a split mold for each convex mold of the outer roll,
The can body processing apparatus according to claim 1 or 2, wherein the outer roll includes a concave split mold and / or a split mold for each convex split mold of the inner roll. The inner roll split mold and the outer roll split mold are:
Divided in a direction transverse to the main axis of the barrel of the metal can, or
Is vertically divided in the direction passing through the main axis of the barrel of the metal can, or
4. The can body processing apparatus according to claim 1, wherein the can body processing apparatus is divided into a grid in a direction crossing a main axis of the body portion of the metal can and a direction passing through the main axis of the body portion of the metal can. In the inner roll of the can body processing apparatus for forming a convex pattern and a concave pattern on the body side wall by sandwiching and pressing the body side wall of the metal can between the inner roll and the outer roll,
A convex mold with a convex sculpture formed on the outer surface;
A concave mold in which a concave sculpture is formed on the outer surface, and / or a split mold in which the outer surface is covered with an elastic body,
An inner roll characterized by comprising: In the outer roll of the can barrel processing apparatus for forming a convex pattern and a concave pattern on the barrel side wall by sandwiching and pressing the barrel side wall of the metal can between the inner roll and the outer roll,
A convex mold with a convex sculpture formed on the outer surface;
A concave mold in which a concave sculpture is formed on the outer surface, and / or a split mold in which the outer surface is covered with an elastic body,
An outer roll characterized by comprising: It is divided into a plurality of split molds, and at least one of the split molds inserts an inner roll that is a convex split mold in which convex sculpture is formed on the outer surface, into the inside of the metal can,
The metal can is divided between a plurality of split molds, and at least one of the split molds is an outer roll that is a convex split mold in which convex sculpture is formed on the outer surface, and the inner roll. A convex-concave pattern and a concave-shaped pattern are formed on the barrel side wall by press-contacting with the barrel side wall.

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