JP5832858B2 - Metal can - Google Patents

Description

  The present invention relates to a metal can in which one or more unit emboss patterns are provided on the outer peripheral surface of a can body, a metal can manufacturing apparatus, and a metal can manufacturing method.

  On the outer surface of the can body of metal cans (eg, steel cans, aluminum cans) filled with beverages (eg, soft drinks, beer) etc., consumers will be motivated to purchase them when they are placed in stores. Therefore, various embossed patterns are shaped by embossing.

  For example, in Japanese Patent Laid-Open No. 10-328772 (Patent Document 1), a triangular inclined surface is formed adjacent to a flat concave surface above and below a plurality of rectangular flat concave surfaces arranged in the circumferential direction and the axial direction of the can body. Thus, it is disclosed that a plurality of hexagonal concave surfaces are formed.

  Japanese Patent No. 4206754 (Patent Document 2) discloses that a glossy portion and a non-glossy portion are formed by separately coating a plurality of triangular inclined surfaces inside a plurality of portions.

  The embossing for forming such an embossed pattern is generally performed by the following method.

  That is, using a pair of inner and outer rolls whose rotational axes are arranged in parallel to each other, the inner roll is placed inside the can body and the outer roll is placed outside the can body, Embossing is performed on the outer peripheral surface of the can body by rotating the inner and outer mold rolls in opposite directions with the can body sandwiched between the mold roll and the outer mold roll.

  In addition, the embossing using a type | mold roll may be performed, for example with respect to a metal plate other than a can body (for example, refer patent document 3).

  Japanese Patent Laid-Open No. 4-87939 (Patent Document 4) discloses an embossed pattern in which a step portion is formed around each of a plurality of planar panel portions and each panel portion is surrounded by the step portions. It is disclosed. In this embossed pattern, in order to reinforce the can body whose mechanical strength has been reduced by embossing, the stepped portion is formed in a frame shape.

JP-A-10-328772 Japanese Patent No. 4206754 Japanese Patent Laid-Open No. 11-244960 Japanese Patent Laid-Open No. 4-87939

  Thus, in such a metal can, in order to stimulate consumers' willingness to purchase and to differentiate from the products of other companies, high design is required.

  Then, this invention makes it a subject to provide the metal can which has high designability, its manufacturing apparatus, and the manufacturing method of a metal can.

  The present invention provides the following means.

[1] A metal can provided with one or more unit embossed patterns on the outer peripheral surface of the can body,
The unit embossed pattern is
An outermost folding line that is formed on the outer peripheral edge of the unit embossed pattern and divides the unit embossed pattern;
A first cell surface disposed substantially parallel to a reference outer peripheral surface of the can body at a central portion inside the outermost peripheral folding line;
A first folding line formed on an outer peripheral edge of the first cell surface;
A plurality of second cell surfaces arranged side by side in the circumferential direction of the first cell surface in a state of surrounding the first cell surface outside the first fold curve inside the outermost fold curve; ,
The plurality of second cell surfaces are adjacent to the first cell surface via the first folding line and are bent relative to the first cell surface, and are further adjacent to each other. The cell surfaces are bent in a state in which they are inclined in different directions via a second folding line formed at the boundary between the second cell surfaces,
The width of each second cell surface projected on the reference outer peripheral surface of the can body is set to 1.5 mm or more, and the area of the first cell surface projected on the reference outer peripheral surface of the can body is the can It is set to 0.1 to 0.5 times the total area of the area of the first cell surface projected on the reference outer peripheral surface of the cylinder and the total area of the plurality of second cell surfaces. Metal can.

  [2] The metal can according to item 1, wherein a bending angle of the second cell surface with respect to the first cell surface is set within a range of 3 to 30 °.

[3] The third cell surface is disposed outside the plurality of second cell surfaces inside the outermost peripheral folding curve so as to surround the plurality of second cell surfaces,
The third cell surface is bent relative to the plurality of second cell surfaces via a third folding line formed at a boundary between the third cell surface and the plurality of second cell surfaces. 3. The metal can according to 1 or 2 above.

  [4] The metal can according to any one of items 1 to 3, wherein the front shape of the outer peripheral contour line of the unit emboss pattern and the front shape of the outer peripheral contour line of the first cell surface are substantially similar to each other.

[5] A metal can manufacturing apparatus according to any one of items 1 to 4,
An inner mold disposed inside the can body, and an outer mold disposed outside the can body and sandwiching the can body between the inner mold,
While either one of the molding convex part and the concave part is provided on the surface of the inner mold, the other is provided on the surface of the outer mold,
The molding convex part and the concave part are for forming a unit embossed pattern on the outer peripheral surface of the can body by fitting the molding convex part into the concave part through the can body,
The molding convex portion is inserted into the concave portion from between the bottom surface of the concave portion and the front end surface of the molding convex portion in a state of being fitted into the concave portion via a can body when a unit embossed pattern is molded. Over a region between the peripheral surface and the outer peripheral surface of the molding convex portion, it is formed in a size that produces a clearance larger than the thickness of the can body,
The opening peripheral edge of the recess functions as an outermost peripheral molding edge for forming an outermost peripheral folding curve,
A first molding surface that molds a first cell surface, a first ridge line that is formed on the outer peripheral edge of the first molding surface and that forms a first folding line, on the tip surface of the molding convex portion, and the first A plurality of second molding surfaces that are arranged outside one ridge line and that mold a plurality of second cell surfaces; and
The plurality of second molding surfaces are different from each other through second ridge lines that form the second folding line while the second molding surfaces adjacent to each other are formed at the boundary between the second molding surfaces. An apparatus for manufacturing a metal can, wherein the metal can is bent in a slanted state.

  [6] A method for producing a metal can, comprising producing the metal can according to any one of items 1 to 4 using the apparatus for producing a metal can according to item 5 above.

  The present invention has the following effects.

  In the invention of [1], the unit embossed pattern provided on the outer peripheral surface of the can body is formed on the outer peripheral edge of the unit embossed pattern and has the outermost peripheral folding line that defines the unit embossed pattern. The pattern can be clarified by the outermost fold curve.

  Furthermore, since the unit embossed pattern includes the first cell surface disposed substantially parallel to the reference outer peripheral surface of the can body at the center portion inside the outermost peripheral folding curve, It is less likely to be scratched as compared to the one with the apex pointed outward in the radius. Furthermore, since the first folding line is formed at the outer peripheral edge of the first cell surface, the first cell surface can be clarified by the first folding line.

  Further, the unit embossed pattern is a plurality of second cell surfaces arranged in the circumferential direction of the first cell surface so as to surround the first cell surface outside the first fold line inside the outermost fold curve. A plurality of second cell surfaces that are adjacent to the first cell surface via the first folding curve and are bent relative to the first cell surface, and are further adjacent to each other. Since the cell surfaces are bent in different directions through a second folding line formed at the boundary between the two second cell surfaces, the first cell is formed by the plurality of second cell surfaces. The light can be diffusely reflected in a state of surrounding the surface to give a glittering feeling, the first cell surface can be further clarified, and the unit embossed pattern can be further clarified.

  In addition, the width of each second cell surface projected onto the reference outer peripheral surface of the can body is set to 1.5 mm or more, so that when the unit embossed pattern is viewed from the front side, the light from the plurality of second cell surfaces The amount of irregular reflection can be increased, and a glittering feeling can be surely produced. Further, the area of the first cell surface projected on the reference outer peripheral surface of the can body is a total area of the area of the first cell surface projected on the reference outer peripheral surface of the can body and the total area of the plurality of second cell surfaces. When the unit embossed pattern is viewed from the front side, it is very beautiful due to irregularly reflected light from the plurality of second cell surfaces and reflected light from the first cell surfaces. Can be obtained. Thereby, the design property of a metal can can be improved.

  In the invention of [2], when the bending angle of the second cell surface with respect to the first cell surface is set within a range of 3 to 30 °, the unit embossed pattern is very beautiful when viewed from the front side. Reliable reflection can be obtained with certainty.

  In the invention of [3], the third cell surface is disposed outside the plurality of second cell surfaces inside the outermost folding line so as to surround the plurality of second cell surfaces, Since the third cell surface is bent relative to the plurality of second cell surfaces via the third folding line formed at the boundary with the plurality of second cell surfaces, the plurality of second cells The glitter can be further increased in a state where the first cell surface is surrounded by the surface and the third cell surface.

  In the invention of [4], the front shape of the outer peripheral contour line of the unit emboss pattern and the front shape of the outer peripheral contour line of the first cell surface are substantially similar to each other, so that the first cell surface appears to be lifted. be able to. Thereby, the design property of a metal can can further be improved.

  According to the invention [5], the metal can manufacturing apparatus according to any one of the above [1] to [4] can be provided.

  Furthermore, the invention of [5] has the following effects superior to those of the conventional apparatus.

  In the conventional apparatus for forming a three-dimensional embossed pattern on the outer peripheral surface of the can body by embossing, either one of the inner mold roll and the outer mold roll is provided with a molding convex part for molding the three-dimensional shape, On the other side, a molding concave portion corresponding to the molding convex portion is provided. The molding convex part and the molding concave part have shapes transferred to each other. In the conventional apparatus having both the inner and outer mold rolls, the can body is tightly sandwiched between the molding convex part and the molding concave part at the time of forming the embossed pattern, so that the embossed surface is likely to be distorted or wrinkled. It was.

  On the other hand, in the invention of [5], the molding convex portion is fitted into the concave portion through the can body during molding of the unit embossed pattern, and the bottom surface of the concave portion and the tip surface of the molding convex portion. Is formed in such a size that a clearance larger than the thickness of the can body is generated over the region between the inner peripheral surface of the concave portion and the outer peripheral surface of the molding convex portion. It is possible to prevent the occurrence of distortion and fine wrinkles. Thereby, a glittering feeling can be surely obtained, and thus a metal can having high design properties can be obtained with certainty.

  In the invention [6], the metal can according to any one of the above [1] to [4] can be obtained reliably.

FIG. 1 is a perspective view of a metal can having a unit embossed pattern according to the first embodiment of the present invention. FIG. 2 is a front view of the unit emboss pattern. 3A is a cross-sectional view taken along line XX in FIG. FIG. 3B is an enlarged cross-sectional view of the first folding line of the unit embossed pattern and the vicinity thereof in FIG. 3A. FIG. 4 is a cross-sectional view of the unit embossed pattern during molding. FIG. 5 is an enlarged cross-sectional view of a main part of FIG. FIG. 6A is an enlarged perspective view of a forming convex portion of the inner roll. FIG. 6B is an enlarged perspective view of a concave portion of the outer roll. FIG. 7 is a front view of a modification of the unit emboss pattern according to the first embodiment. FIG. 8 is a front view of another modified example of the unit embossed pattern of the first embodiment. FIG. 9 is a front view of a unit emboss pattern according to the second embodiment of the present invention. 10A is a sectional view taken along line XX in FIG. FIG. 10B is an enlarged cross-sectional view of the first folding line of the unit embossed pattern and the vicinity thereof in FIG. 10A. FIG. 11 is a cross-sectional view of the unit embossed pattern during molding. FIG. 12 is an enlarged cross-sectional view of the main part of FIG. FIG. 13A is a front view of a unit emboss pattern according to the third embodiment of the present invention. FIG. 13B is a front view of a modified example of the unit emboss pattern of the third embodiment. FIG. 13C is a front view of another modification of the unit emboss pattern of the third embodiment. FIG. 14A is a front view of a unit emboss pattern according to the fourth embodiment of the present invention. FIG. 14B is a front view of a modification of the unit embossed pattern according to the fourth embodiment. FIG. 14C is a front view of another modification of the unit embossed pattern according to the fourth embodiment. FIG. 15A is a front view of a unit emboss pattern according to the fifth embodiment of the present invention. FIG. 15B is a front view of a modified example of the unit embossed pattern according to the fifth embodiment. FIG. 16A is a front view of a unit emboss pattern according to the sixth embodiment of the present invention. FIG. 16B is a front view of a modified example of the unit emboss pattern of the sixth embodiment. FIG. 17 is a front view of a unit emboss pattern according to the seventh embodiment of the present invention. 18A is a cross-sectional view taken along line XX in FIG. FIG. 18B is an enlarged cross-sectional view of the first folding line of the unit embossed pattern and the vicinity thereof in FIG. 18A. FIG. 19 is a cross-sectional view of the unit embossed pattern during molding. 20 is an enlarged cross-sectional view of a main part of FIG.

  Next, several embodiments of the present invention will be described below with reference to the drawings.

  FIGS. 1-6B is a figure explaining 1st Embodiment of this invention. As shown in FIG. 1, the metal can 10 according to the first embodiment is filled with liquid such as beer or soft drink as contents. Further, the metal can 10 is, for example, an aluminum can or a steel can. Specifically, the metal can 10 is made of aluminum having a metallic luster (including an alloy thereof; the same shall apply hereinafter), and DI (Drawing and It is desirable that it is manufactured by ironing.

  The metal can 10 includes a bottomed cylindrical can body 11 and a disc-shaped canopy 15 that closes an upper opening of the can body 11. The outer diameter of the can body 11 is set to 50 to 70 mm, for example. The wall thickness t of the can body 11 (specifically, the peripheral wall of the can body 11) is set to 0.08 to 0.15 mm, for example (see FIG. 3A).

  On the outer peripheral surface 11a of the can body 11, a plurality of (three in the first embodiment) unit embossed patterns 1A arranged in the vertical direction are formed by embossing. These unit embossed patterns 1A have the same shape and the same size.

  In the present invention, the plurality of unit embossed patterns 1A are not limited to be formed on the outer peripheral surface 11a of the can body 11 at intervals in the vertical direction. May be formed side-by-side without spacing, or may be formed side-by-side with or without spacing in the circumferential direction, or spaced apart in the vertical and circumferential directions, respectively. They may be formed side by side without being arranged, or may be formed side by side with or without being spaced in the oblique direction with respect to the vertical direction and the circumferential direction.

  As shown in FIGS. 2 and 3A, the unit embossed pattern 1A includes a valley-folded outermost fold curve 2 formed on the outer peripheral edge of the unit embossed pattern 1A. As shown in FIG. 3A, the outermost peripheral folding line 2 is arranged inside the can body 11 with respect to the reference outer peripheral surface 11 z shown by the one-dot chain line of the can body 11. Furthermore, the outermost peripheral folding line 2 defines the unit embossed pattern 1A on the outer peripheral surface 11a of the can body 11, that is, the line constituting the outer peripheral outline of the unit embossed pattern 1A. The inner region surrounded by the outermost folding line 2, that is, the unit embossed pattern 1 </ b> A is formed in a convex shape that protrudes in the radially outward direction of the can body 11 with respect to the position of the outermost folding line 2. Furthermore, the front shape of the inner region, that is, the front shape of the outer peripheral contour line of the unit embossed pattern 1A formed by the outermost fold curve 2 is a polygonal shape, more specifically an octagonal shape (more specifically, a regular octagonal shape). It is.

  The size of the unit embossed pattern 1A can be variously set on the outer peripheral surface 11a of the can body 11, but it is particularly desirable that the smallest circle S (indicated by a two-dot chain line in FIG. 2) surrounding the unit embossed pattern 1A. The diameter may be set within a range of 5 to 20 mm because a very beautiful reflection can be surely obtained. Further, as shown in FIG. 3A, the outer vicinity of the outermost peripheral fold curve 2 on the outer peripheral surface 11 a of the can body 11 is gently recessed toward the outermost fold curve 2. In FIG. 3A, Q is the central axis of the can body 11.

  A first cell surface 3 is formed at the center position in the central portion inside the outermost folding line 2. As shown in FIG. 3A, the first cell surface 3 is arranged in parallel with the reference outer peripheral surface 11z of the can body 11, and in the first embodiment, the same as the reference outer peripheral surface 11z of the can body 11 will be described in detail. It is arranged in the plane.

  A first folding line 4 having a mountain fold shape is formed on the outer peripheral edge of the first cell surface 3 along the outer peripheral edge. The front shape of the outer peripheral contour line of the first cell surface 3 formed by the first folding line 4 is a polygonal shape, and more specifically, an octagonal shape (more specifically, a regular octagonal shape). Therefore, the front shape of the outer peripheral contour line of the first cell surface 3 is similar to the front shape of the outer peripheral contour line of the unit embossed pattern 1A. Furthermore, in the front view, the direction of the corners of the outer peripheral contour line of the first cell surface 3 and the direction of the corners of the outer peripheral contour line of the unit embossed pattern 1A coincide with each other.

  A plurality of second cell surfaces 5 arranged in the circumferential direction of the first cell surface 3 so as to surround the first cell surface 3 are formed outside the first fold curve 4 inside the outermost fold curve 2. Yes. In the first embodiment, the number of the second cell surfaces 5 is eight. The plurality of second cell surfaces 5 have the same front shape and the same dimensions. The front shape of the second cell surface 5 is a trapezoid (specifically, an isosceles trapezoid).

  The plurality of second cell surfaces 5 are adjacent to the first cell surface 3 via the first folding curve 4 and are bent inward in the radius of the can body 11 with respect to the first cell surface 3. Thereby, the plurality of second cell surfaces 5 are inclined with respect to the first cell surface 3, respectively. As shown in FIG. 3B, the bending angle α of each second cell surface 5 with respect to the first cell surface 3 can be variously set. A particularly desirable range of α will be described later.

  Further, the plurality of second cell surfaces 5 have second fold-shaped second folding curves 6 in which the second cell surfaces 5 and 5 adjacent to each other are formed at the boundary between the second cell surfaces 5 and 5. Are bent in different directions. The second fold curve 6 extends radially straight from the corner of the first fold curve 4 toward the corner of the outermost fold curve 2.

  A third cell surface 7 is formed outside the plurality of second cell surfaces 5 inside the outermost folding line 2 so as to surround the plurality of second cell surfaces 5. In the first embodiment, the number of the third cell surfaces 7 is plural, and more specifically eight. The plurality of third cell surfaces 7 are arranged side by side in the circumferential direction of the plurality of second cell surfaces 5. Further, the plurality of third cell surfaces 7 have the same front shape and the same dimensions. The front shape of the third cell surface 7 is trapezoidal.

  A mountain-folded third fold curve 8 is formed at the boundary between the plurality of third cell surfaces 7 and the plurality of second cell surfaces 5. The plurality of third cell surfaces 7 are adjacent to the second cell surface 5 via the third folding curve 8 and are bent inward in the radial direction of the can body 11 with respect to the second cell surface 5. . Thereby, the plurality of third cell surfaces 7 are inclined with respect to the first cell surface 3 and the second cell surface 5, respectively. The front shape of the outer peripheral contour lines of the plurality of second cell surfaces 5 created by the third folding curve 8 is an octagonal shape (specifically, a regular octagonal shape). Therefore, the front shape of the outer peripheral contour line of the first cell surface 3 and the front shape of the outer peripheral contour line of the unit embossed pattern 1A are similar to each other. Furthermore, the direction of the corners of the outer peripheral contour lines of the plurality of second cell surfaces 5, the direction of the corners of the outer peripheral contour lines of the first cell surface 3, and the direction of the corners of the outer peripheral contour lines of the unit embossed pattern 1 A in front view Are consistent with each other.

  Further, the plurality of third cell surfaces 7 have a mountain-folded fourth folding curve 9 formed between the third cell surfaces 7 and 7 adjacent to each other at the boundary between the third cell surfaces 7 and 7. Are bent in different directions. The fourth fold curve 9 extends radially straight from the corner of the third fold curve 8 toward the corner of the outermost fold curve 2.

  And the outermost periphery folding line 2 is formed in the outer periphery of the several 3rd cell surface 7 along this outer periphery.

  The outermost fold curve 2, the second fold curve 6, the third fold curve 8, and the fourth fold curve 9 are all disposed inside the can body 11 with respect to the reference outer peripheral surface 11z of the can body 11. Of these folding curves 2, 6, 8, 9, the outermost folding curve 2 is arranged deepest inside the can body 11. The depth F of the outermost folding line 2 to the inside of the can body 11 with respect to the position of the reference outer peripheral surface 11z of the can body 11 can be variously set, and in particular can be set to 0.1 to 1.5 mm. This is desirable in that a very beautiful reflection can be reliably obtained.

  Here, in the unit embossed pattern 1A of the first embodiment, as shown in FIG. 3A, the width W of each second cell surface projected on the reference outer peripheral surface 11z of the can body 11 is set to 1.5 mm or more. Yes.

  Furthermore, the area A of the first cell surface 3 projected onto the reference outer peripheral surface 11z of the can body 11 is equal to the area A of the first cell surface 3 projected onto the reference outer peripheral surface 11z of the can body 11 and the plurality of second cell surfaces 5. The total area B is set to 0.1 to 0.5 times the total area A + B. That is, A and B satisfy the following formula (Formula 1).

  0.1 ≦ A / (A + B) ≦ 0.5 (Formula 1).

  The metal can 10 of the first embodiment has the following advantages.

  The unit embossed pattern 1A provided on the outer peripheral surface 11a of the can body 11 of the metal can 10 is formed on the outer peripheral edge of the unit embossed pattern 1A and has the outermost peripheral folding line 2 that defines the unit embossed pattern 1A. The unit embossed pattern 1A can be clarified by the outermost folding line 2.

  Furthermore, since the unit embossed pattern 1A includes the first cell surface 3 arranged in parallel to the reference outer peripheral surface 11z of the can body 11 at the central portion inside the outermost peripheral folding curve 2, the outermost folding curve 2 Scratches are harder to be scratched compared to the case where the apex pointed radially outward of the can body 11 is arranged inside. Furthermore, since the first folding line 4 is formed on the outer peripheral edge of the first cell surface 3, the first cell surface 3 can be clarified by the first folding line 4.

  In the present invention, the first cell surface 3 is disposed in the same plane as the reference outer peripheral surface 11z of the can body 11 as in the first embodiment, or the can cell is closer to the reference outer peripheral surface 11z of the can body 11. It is particularly desirable to be arranged inside the barrel 11. By doing so, it is possible to prevent a problem that the first cell surface 3 is rubbed and scratched by the vibration during transportation of the metal can 10, and it is not necessary to change the size of the cardboard case that accommodates the metal can 10. There is an effect.

  Furthermore, the unit embossed pattern 1 </ b> A is arranged outside the first folding line 4 inside the outermost folding line 2 and arranged side by side in the circumferential direction of the first cell surface 3 so as to surround the first cell surface 3. And the plurality of second cell surfaces 5 are adjacent to the first cell surface 3 and bent relative to the first cell surface 3 via the first folding line 4. Furthermore, the plurality of second cell surfaces 5 have a second folding line 6 formed between the second cell surfaces 5 and 5 adjacent to each other at the boundary between the second cell surfaces 5 and 5. The light is diffused by the plurality of second cell surfaces 5 to give a glittering feeling, and the first cell surface 3 is further clarified. The unit embossed pattern 1A can be further clarified.

  Moreover, since the width W of each second cell surface 5 projected onto the reference outer peripheral surface 11z of the can body 11 is set to 1.5 mm or more, when the unit embossed pattern 1A is viewed from the front side, a plurality of second cell surfaces 5 The amount of irregular reflection of light by the two-cell surface 5 can be increased, and a glittering feeling can be surely produced. On the other hand, when W is less than 1.5 mm, when the unit embossed pattern 1 </ b> A is viewed from the front side, the amount of irregular reflection of light by the plurality of second cell surfaces 5 is too small to give a glittering feeling. The upper limit of W is not limited and can be set in various ways, but it is particularly preferable that the upper limit of W is set to 20 mm or less.

  Furthermore, when W is 1.5 mm or more, the area A of the first cell surface 3 projected onto the reference outer peripheral surface 11z of the can body 11 is the first cell surface 3 projected onto the reference outer peripheral surface 11z of the can body 11. When the unit embossed pattern 1A is viewed from the front side, it is set to 0.1 to 0.5 times the total area A + B of the area A and the total area B of the plurality of second cell surfaces 5 A very beautiful reflection can be obtained by the irregularly reflected light from the plurality of second cell surfaces 5 and the reflected light from the first cell surface 3. Thereby, the metal can 10 by which the embossed pattern 1A which has the high designability in the outer peripheral surface 11a of the can body 11 was formed can be obtained.

  Here, in the unit embossed pattern 1A of the first embodiment, as shown in FIG. 2, A is set to about 0.25 times A + B, that is, the value Z of A / (A + B) is about 0.25. When Z is 0.1, the unit embossed pattern 1A has the shape shown in FIG. When Z is 0.5, the unit embossed pattern 1A has the shape shown in FIG.

  When Z is less than 0.1, A is too small with respect to the total area A + B (that is, B is too large), and a beautiful reflection cannot be obtained. When Z exceeds 0.5, A is too large (that is, B is too small) with respect to the total area A + B, so that a beautiful reflection cannot be obtained. That is, when the total areas A + B and A are set to an appropriate ratio, very beautiful reflection can be obtained, and the value Z of A / (A + B) as the appropriate ratio is 0.1 to 0. .5. A particularly desirable range of Z is 0.3 to 0.4.

  In the first embodiment, the number of the second cell surfaces 5 is eight. However, in the present invention, the number of the second cell surfaces 5 is not limited to eight and may be plural. In particular, it is desirable that the number of the second cell surfaces 5 is 5 or more, which can surely increase the number and amount of irregularly reflected light by the second cell surface 5 and can surely give a glittering feeling. Thus, a very beautiful reflection can be surely obtained. The upper limit of the number of the second cell surfaces 5 is not limited, but is preferably 10 or less. As described above, since the number of the second cell surfaces 5 is 10 or less, the second cell surfaces 5 and 5 adjacent to each other are reliably folded in a state in which they are inclined in different directions via the second folding curve 6. It can be tuned, and thereby a glittering feeling can be more reliably produced.

  Further, as shown in FIG. 3B, it is desirable that the bending angle α of each second cell surface 5 with respect to the first cell surface 3 is set in a range of 3 to 30 °. When the pattern 1A is viewed from the front side, a very beautiful reflection can be reliably obtained.

  The ranges of W, Z, and α described above have been found by experiments conducted by the present inventors by changing these values in various ways.

  Furthermore, a plurality of third cell surfaces 7 are arranged outside the plurality of second cell surfaces 5 inside the outermost folding line 2 so as to surround the plurality of second cell surfaces 5, and the third cell surface Since the third cell surface 7 is bent relative to the second cell surface 5 via the third folding line 8 formed at the boundary between the second cell surface 5 and the second cell surface 5, The glittering feeling can be further increased by the two-cell surface 5 and the third cell surface 7.

  In addition, since the front shape of the outer peripheral contour line of the unit embossed pattern 1A and the front shape of the outer peripheral contour line of the first cell surface 3 are similar to each other, the first cell surface 3 can appear to be lifted. Thereby, the design property of the metal can 10 can further be improved.

  Next, the manufacturing method of the metal can 10 of the first embodiment will be described below.

  First, a can body 11 formed into a bottomed cylindrical shape by DI processing or the like is prepared. 4 and 5, a unit embossed pattern 1A is formed on the outer peripheral surface 11a of the can body 11 by embossing. The embossing device 20 used at that time includes an inner mold roll 21 as an inner mold and an outer mold roll 22 as an outer mold.

  Each of the inner mold roll 21 and the outer mold roll 22 is rotatable about the axis P. The inner mold roll 21 and the outer mold roll 22 are arranged to face each other, and the inner mold roll is sandwiched between the inner and outer mold rolls 21 and 22 and the can body 11 (specifically, the peripheral wall of the can body 11). The desired unit embossed pattern 1A is formed on the outer peripheral surface 11a of the can body 11 by rotating the outer mold 21 and the outer roll 22 in opposite directions. R indicates the rotation direction of the rolls 21 and 22.

  The inner mold roll 21 is disposed inside the can body 11, and the outer mold roll 22 is disposed outside the can body 11 so as to face the inner mold roll 21.

  Formed convex portions 30 are provided on the surface (in detail, the outer peripheral surface) of the inner mold roll 21. On the other hand, a concave portion 40 corresponding to the molding convex portion 30 is provided on the surface (outer peripheral surface in detail) of the outer mold roll 22. The molding convex part 30 and the concave part 40 are unit embossed patterns on the outer peripheral surface 11a of the can body 11 by fitting the molding convex part 30 into the concave part 40 via the can body 11 (specifically, the peripheral wall of the can body 11). 1A is formed.

  As shown in FIG. 5, the molding convex portion 30 is formed between the bottom surface 40 a of the concave portion 40 and the molding convex portion 30 with the unit embossed pattern 1 </ b> A being fitted into the concave portion 40 via the can body 11. The thickness t of the can body 11 (specifically, the peripheral wall of the can body 11) extends from the front end surface 30 a to the region between the inner peripheral surface 40 b of the concave portion 40 and the outer peripheral surface 30 b of the molding convex portion 30. The size is such that a larger clearance C is generated.

  Here, for convenience of explanation, the clearance C between the bottom surface 40a of the concave portion 40 and the tip surface 30a of the molding convex portion 30 is particularly “first clearance C1”, the inner peripheral surface 40b of the concave portion 40 and the outer peripheral surface of the molding convex portion 30. The clearance C between 30 b is called “second clearance C2”.

  The dimensions of the first clearance C1 and the second clearance C2 are both set larger than the wall thickness t of the can body 11 as described above. In particular, the dimension of the second clearance C2 is desirably set within a range of 1.5 to 10 times the wall thickness t of the can body 11.

  As shown in FIG. 5, the opening peripheral edge 42 of the recess 40 functions as the outermost peripheral forming edge for forming the outermost peripheral folding line 2 of the unit embossed pattern 1 </ b> A. The cross-sectional angle θ1 of the opening peripheral edge 42 of the recess 40 is set to 90 ° or less than 90 °.

  As shown in FIGS. 5 and 6A, a first molding surface 33 for molding the first cell surface 3 is provided at the center position of the center portion of the tip surface 30 a of the molding convex portion 30. The first molding surface 33 is formed in parallel with the reference outer peripheral surface 11z of the can body 11. Furthermore, the 1st ridgeline 34 which shape | molds the 1st folding line 4 is provided in the outer periphery of the 1st shaping | molding surface 33 in the front end surface 30a of the shaping | molding convex part 30, Furthermore, several outside the 1st ridgeline 34 is provided outside. A plurality of second molding surfaces 35 for molding the second cell surface 5 are provided side by side in the circumferential direction of the first molding surface 33 so as to surround the first molding surface 33. Further, the plurality of second molding surfaces 35 are different from each other between the second molding surfaces 35 and 35 adjacent to each other via a second ridge line 36 formed at the boundary between the second molding surfaces 35 and 35. It is bent in a state inclined in the direction. The second ridge line 36 forms the second folding line 6.

  Further, the plurality of second molding surfaces 35 are adjacent to the first molding surface 33 via the first ridge line 34 and are bent relative to the first molding surface 33.

  Further, a non-contact surface 37 that does not come into contact with the can body 11 when the unit embossed pattern 1A is formed on the outer peripheral surface 30b of the molding convex portion 30 or outside the plurality of second molding surfaces 35 on the tip surface 30a of the molding convex portion 30. Is formed. In the first embodiment, the non-contact surface 37 is formed on the outer peripheral surface 30 b of the molding convex portion 30. More specifically, the non-contact surface 37 is composed of the outer peripheral surface 30 b of the molding convex portion 30. A third ridge line 38 is formed at the boundary between the non-contact surface 37 and the plurality of second molding surfaces 35. The third ridge line 38 forms the third folding line 8. The non-contact surface 37 is adjacent to the plurality of second molding surfaces 35 via the third ridge line 38 and is bent relative to the plurality of second molding surfaces 35. An angle θ2 formed between the surface of the inner roll 21 and the non-contact surface 37 is, for example, about 90 °.

  Further, the front shape of the inner region surrounded by the opening periphery 42 of the recess 40 and the front shape of the outer peripheral contour line of the first molding surface 33 formed by the first ridge line 34 are respectively octagonal shapes (specifically, regular octagonal shapes). That is, they are similar to each other.

  In the forming method of the unit embossing pattern 1A using the embossing apparatus 20 provided with the inner mold roll 21 and the outer mold roll 22, the can body 11 is sandwiched between the inner and outer mold rolls 21 and 22, as shown in FIG. Thus, by rotating the inner mold roll 21 and the outer mold roll 22 in opposite directions, the molding convex part 30 is fitted into the concave part 40 via the can body 11. Thereby, as shown in FIG. 5, a desired unit embossed pattern 1 </ b> A is formed on the outer peripheral surface 11 a of the can body 11.

  That is, the outermost peripheral folding line 2 is formed on the outer peripheral surface 11 a of the can body 11 by the opening peripheral edge 42 of the recess 40. The first cell surface 3 is molded by the first molding surface 33 at the center position inside the outermost folding line 2. A first folding line 4 is formed on the outer peripheral edge of the first forming surface 33 by the first ridge line 34. A plurality of second cell surfaces 5 are formed by the plurality of second molding surfaces 35 on the outside of the first folding curve 4 inside the outermost peripheral folding curve 2. A second folding line 6 is formed by the second ridge line 36 at the boundary between the second cell surfaces 5 and 5 adjacent to each other. On the outside of the plurality of second cell surfaces 5 (third fold curve 8) inside the outermost fold curve 2, a clearance C (between the inner circumference surface 40 b of the recess 40 and the non-contact surface 37 of the molding projection 30 is provided. That is, a plurality of third cell surfaces 7 are formed by the region of the second clearance C2), and at the same time, a third folding line 8 is formed by the third ridge line 38, and the third cell surfaces 7, 7 adjacent to each other are formed. A fourth fold curve 9 is generated at the boundary between the corners of the third fold curve 8 and the corners of the outermost fold curve 2.

  After forming the unit embossed pattern 1A on the outer peripheral surface 11a of the can body 11 and reducing the diameter of the upper opening of the can body 11, the canopy 15 is attached to the upper end opening of the can body 11 according to a conventional method. Thus, the upper opening of the can body 11 is closed by the canopy 15.

  The manufacturing method of the metal can 10 described above has the following advantages.

  The molding convex part 30 is formed in such a size that a clearance C larger than the wall thickness t of the can body 11 is generated in a state of being fitted into the concave part 40 through the can body 11 when the unit embossed pattern 1A is formed. In particular, since the first clearance C1 larger than the wall thickness t of the can body 11 is formed between the bottom surface 40a of the concave portion 40 and the tip surface 30a of the molding convex portion 30, the embossed surface is distorted. It is possible to prevent the occurrence of fine wrinkles. Thereby, a glittering feeling can be taken out reliably and the metal can 10 which has high designability can be manufactured reliably.

  Furthermore, a non-contact surface 37 that does not come into contact with the can body 11 when the unit embossed pattern 1A is molded is disposed outside the plurality of second molding surfaces 35 on the tip surface 30a of the molding convex portion 30. Since the non-contact surface 37 is bent relative to the plurality of second molding surfaces 35 via the third ridge lines 38 formed at the boundaries with the plurality of second molding surfaces 35, the third ridge lines 38 are formed. The third folding curve 8 can be formed by the above, and the third cell surface 7 can be molded outside the plurality of second cell surfaces 5 inside the outermost circumferential folding curve 2 via the third folding curve 8. it can.

  Further, the third cell surface 7 can be molded in the region of the clearance C (that is, the second clearance C2) between the inner peripheral surface 40b of the concave portion 40 and the non-contact surface 37 of the molding convex portion 30.

  FIGS. 9-12 is a figure explaining the unit embossing pattern 1B which concerns on 2nd Embodiment of this invention. In these drawings, the same reference numerals are assigned to the same elements as those in the first embodiment. In the following, the second embodiment will be described focusing on the differences from the first embodiment.

  As shown in FIGS. 9 and 10A, the unit embossed pattern 1B of the second embodiment includes a third folding line 8, a third cell surface 7, and a fourth folding line 9 from the unit embossed pattern 1A of the first embodiment. The shape is removed. On the other hand, as shown in FIGS. 11 and 12, the inner mold roll 21 and the outer mold roll 22 for forming the unit embossed pattern 1B have the same configuration as the inner mold roll 21 and the outer mold roll 22 of the first embodiment. .

  In this 2nd Embodiment, as shown in FIG. 12, the shaping | molding convex part 30 is shallower than the said 1st Embodiment (refer FIG. 5) in the recessed part 40 via the can body 11 at the time of shaping | molding of the unit embossing pattern 1B. It is inserted. As a result, the third ridge line 38 of the molding convex portion 30 is not pressed to the outside of the first fold curve 4 inside the outermost fold curve 2, and as a result, the third fold curve 8 and the third cell are applied to the unit embossed pattern 1B. Surface 7 is not molded.

  Thus, the unit embossing pattern 1A of 1st Embodiment and the unit embossing pattern 1B of 2nd Embodiment can each be shape | molded by changing the fitting depth in the recessed part 40 of the shaping | molding convex part 30. FIG. . In other words, when the unit embossed pattern 1B of the second embodiment is formed, for example, in FIG. 5, the inclination angle (folding angle α) of the second cell surface 5 with respect to the first cell surface 3 and the third cell surface. Each inclination angle and the depth of fitting of the molding convex part 30 into the concave part 40 may be set as appropriate so that the inclination angles 7 are equal to each other.

  13A to 13C are diagrams illustrating a unit embossed pattern 1C according to the third embodiment of the present invention. In these drawings, the same reference numerals are assigned to the same elements as those in the first embodiment. The third embodiment will be described focusing on the differences from the first embodiment.

  In the unit embossed pattern 1C shown in each figure, the third folding line 8, the third cell surface 7, and the fourth folding line 9 do not exist, respectively. Moreover, the front shape of the inner side region surrounded by the outermost peripheral folding line 2 of the unit embossed pattern 1C is a square shape (in detail, a square shape). The number of second cell surfaces 5 is four. The front shape of the outer peripheral contour line of the first cell surface 3 formed by the first folding line 4 is a square shape (in detail, a square shape). Therefore, the front shape of the outer peripheral contour line of the unit embossed pattern 1C and the front shape of the outer peripheral contour line of the first cell surface 3 are similar to each other.

  The unit embossed pattern 1C shown in FIG. 13A is for the case where the value Z of A / (A + B) is 0.1. The unit embossed pattern 1C shown in FIG. 13B is a case where Z is 0.5. The unit embossed pattern 1C shown in FIG. 13C is a case where Z is 0.1, and the first cell surface 3 moves from the center position inside the outermost peripheral folding curve 2 to the outermost folding curve 2 side. It is arranged at a slightly shifted position.

  14A to 14C are views for explaining a unit embossed pattern 1D according to the fourth embodiment of the present invention. In these drawings, the same reference numerals are assigned to the same elements as those in the first embodiment. The fourth embodiment will be described with a focus on differences from the first embodiment.

  In the unit embossed pattern 1D shown in each figure, the third folding line 8, the third cell surface 7, and the fourth folding line 9 do not exist, respectively. Moreover, the front shape of the inner side region surrounded by the outermost peripheral folding line 2 of the unit embossed pattern 1D is a triangular shape (more specifically, a regular triangular shape). The number of second cell surfaces 5 is three. The front shape of the outer peripheral contour line of the first cell surface 3 created by the first folding line 4 is a triangular shape (more specifically, a regular triangular shape). Therefore, the front shape of the outer peripheral contour line of the unit embossed pattern 1D and the front shape of the outer peripheral contour line of the first cell surface 3 are similar to each other.

  The unit embossed pattern 1D shown in FIG. 14A is for the case where the value Z of A / (A + B) is 0.1. The unit embossed pattern 1C shown in FIG. 14B is a case where Z is 0.5. The unit embossed pattern 1D shown in FIG. 14C is a case where Z is 0.1, and the triangle that is the front shape of the outer peripheral contour of the first cell surface 3 is the front shape of the outer peripheral contour of the unit embossed pattern 1D. It is arranged in a shape slightly rotated in the circumferential direction with respect to the triangle. Thereby, the direction of the corner | angular part of the outer periphery outline of the 1st cell surface 3 and the direction of the corner | angular part of the outer periphery outline of the unit embossing pattern 1A have shifted | deviated from front view.

  15A and 15B are views for explaining a unit embossed pattern 1E according to the fifth embodiment of the present invention. In these drawings, the same reference numerals are assigned to the same elements as those in the first embodiment. The fifth embodiment will be described with a focus on differences from the first embodiment.

  In the unit embossed pattern 1E shown in each figure, the third folding line 8, the third cell surface 7, and the fourth folding line 9 do not exist, respectively. Moreover, the front shape of the inner side area | region enclosed by the outermost periphery folding line 2 of the unit embossing pattern 1E is star shape. The number of the second cell surfaces 5 is ten, and the front shape of the second cell surfaces 5 is a trapezoidal shape (specifically, an unequal leg trapezoidal shape). Moreover, the front shape of the outer periphery outline of the 1st cell surface 3 which the 1st folding line 4 makes is a star shape. Therefore, the front shape of the outer peripheral contour line of the unit embossed pattern 1E and the front shape of the outer peripheral contour line of the first cell surface 3 are similar to each other.

  The unit embossed pattern 1E shown in FIG. 15A is for the case where the value Z of A / (A + B) is 0.1. The unit embossed pattern 1E shown in FIG. 15B is a case where Z is 0.5.

  16A and 16B are diagrams illustrating a unit embossed pattern 1F according to the sixth embodiment of the present invention. In these drawings, the same reference numerals are assigned to the same elements as those in the first embodiment. The fourth embodiment will be described with a focus on differences from the first embodiment.

  In the unit embossed pattern 1F shown in each figure, the third folding line 8, the third cell surface 7, and the fourth folding line 9 do not exist, respectively. In addition, the front shape of the inner region surrounded by the outermost fold curve 2 of the unit embossed pattern 1F is a heart shape formed by connecting a plurality of arcuate curves. The number of the second cell surfaces 5 is eight, and the front shape of the second cell surfaces 5 is a substantially unequal leg trapezoidal shape. Moreover, the front shape of the outer periphery outline of the 1st cell surface 3 which the 1st folding line 4 makes is a substantially heart shape formed by connecting a plurality of straight lines. Therefore, the front shape of the outer peripheral contour line of the unit emboss pattern 1F and the front shape of the outer peripheral contour line of the first cell surface 3 are substantially similar to each other.

  The unit embossed pattern 1F shown in FIG. 16A is for the case where the value Z of A / (A + B) is 0.1. The unit embossed pattern 1F shown in FIG. 16B is a case where Z is 0.5.

  FIGS. 17-20 is a figure explaining the unit embossing pattern 1G which concerns on 7th Embodiment of this invention. In these drawings, the same reference numerals are assigned to the same elements as those in the first embodiment. The seventh embodiment will be described with a focus on differences from the first embodiment.

  As shown in FIG. 18A, the outermost peripheral folding line 2 of the unit embossed pattern 1G of the seventh embodiment is arranged in the same plane as the reference outer peripheral surface 11z of the can body 11, and the outer peripheral surface 11a of the can body 11 It is formed in a mountain fold shape. The inner region surrounded by the outermost folding line 2, that is, the unit embossed pattern 1 G, is obtained by changing the unit embossed pattern 1 A of the first embodiment from a convex shape to a concave shape. On the other hand, the can body 11 is formed in a concave shape recessed inward in the radial direction.

  The first cell surface 3 of the unit embossed pattern 1G is disposed substantially parallel to the reference outer peripheral surface 11z of the can body 11 inside the position of the reference outer peripheral surface 11z of the can body 11. A first folding line 4 having a valley fold shape is formed along the outer peripheral edge of the outer peripheral edge of the first cell surface 3.

  The plurality of second cell surfaces 5 of the unit embossed pattern 1G are respectively adjacent to the first cell surface 3 via the first folding line 4 and bent outwardly of the can body 11 with respect to the first cell surface 3. doing. Thereby, the plurality of second cell surfaces 5 are inclined with respect to the first cell surface 3, respectively. As shown in FIG. 18B, the bending angle α of each second cell surface 5 with respect to the first cell surface 3 is set within a range of 3 to 30 °.

  Further, the plurality of second cell surfaces 5 have second cell surfaces 5 and 5 that are adjacent to each other having a valley-like second folding curve 6 formed at the boundary between the second cell surfaces 5 and 5. Are bent in different directions.

  A third fold curve 8 having a valley fold shape is formed at the boundary between the plurality of third cell surfaces 7 and the plurality of second cell surfaces 5 of the unit embossed pattern 1G. The plurality of third cell surfaces 7 are adjacent to the second cell surface 5 via the third folding curve 8 and are bent outwardly of the can body 11 with respect to the second cell surface 5. . Thereby, the plurality of third cell surfaces 7 are inclined with respect to the first cell surface 3 and the second cell surface 5, respectively.

  In addition, the plurality of third cell surfaces 7 have a third fold-like fourth folding curve 9 formed between the third cell surfaces 7 and 7 adjacent to each other at the boundary between the third cell surfaces 7 and 7. Are bent in different directions. And the outermost periphery folding line 2 is formed in the outer periphery of the some 3rd cell surface 7. FIG.

  In the embossing apparatus 20 for forming the unit embossed pattern 1G of the fourth embodiment on the outer peripheral surface 11a of the can body 11, as shown in FIGS. 19 and 20, a recess 40 is provided on the surface of the inner mold roll 21, and A molding convex portion 30 is provided on the surface of the outer mold roll 22. The molding convex part 30 and the concave part 40 have the same configuration as the molding convex part 30 and the concave part 40 shown in FIGS.

  Using the embossing apparatus 20 provided with the inner mold roll 21 and the outer mold roll 22, as shown in FIGS. 19 and 20, the inner mold roll 21 is sandwiched between the inner and outer mold rolls 21, 22. And the outer mold roll 22 are rotated in opposite directions, so that the molding convex portion 30 is fitted into the concave portion 40 via the can body 11. Thereby, as shown in FIG. 20, the unit embossed pattern 1 </ b> G of the seventh embodiment is formed on the outer peripheral surface 11 a of the can body 11.

  Although several embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications can be made. For example, in the present invention, the unit embossed pattern may be a combination of two or more of these embodiments. Furthermore, in the present invention, the number of unit emboss patterns provided on the outer peripheral surface 11a of the can body 11 of the metal can 10 may be one, or a plurality of unit emboss patterns may be provided on the entire outer surface 11a of the can body 11. It may be provided.

  Further, in the present invention, the front shape of the outer peripheral contour line of the first cell surface 3 may be a polygon as in the above embodiment, or may be a circular shape.

  Further, in the present invention, the unit embossed pattern is formed on the outer side of the third cell surface 7 on the inner side of the outermost peripheral fold curve 2 and one or a plurality of the second emboss patterns via the fold curve formed on the outer peripheral edge of the third cell surface 7. The 4-cell surface may be formed so as to surround the third cell surface 7.

  INDUSTRIAL APPLICABILITY The present invention can be used for a metal can in which one or a plurality of unit emboss patterns for improving design properties are provided on the outer peripheral surface of the can body, a manufacturing apparatus for the metal can, and a method for manufacturing the metal can.

1A to 1G: unit embossed pattern 2: outermost fold curve 3: first cell surface 4: first fold curve 5: second cell surface 6: second fold curve 7: third cell surface 8: third fold curved surface 9 : Fourth folding curve 10: Metal can 11: Can body 11a: Can body outer peripheral surface 21: Inner mold roll (inner mold)
22: Outer roll (outer mold)
30: Molding convex part 30a: Tip surface 30b of molding convex part: Outer peripheral surface 33 of molding convex part: First molding surface 34: First ridge line 35: Second molding surface 36: Second ridge line 37: Non-contact surface 38: Third ridge 40: Concave 40a: Concave bottom 40b: Concave inner peripheral surface 42: Concave opening periphery C: Clearance

Claims (8)

A metal can provided with one or more unit embossed patterns on the outer peripheral surface of the can body,
The unit embossed pattern is
An outermost fold curve having a valley fold shape that is formed on the outer peripheral edge of the unit embossed pattern and partitions the unit embossed pattern,
A first cell surface disposed substantially parallel to a reference outer peripheral surface of the can body at a central portion inside the outermost peripheral folding line;
A first folding line in a mountain fold shape formed on the outer periphery of the first cell surface;
A plurality of second cell surfaces arranged side by side in the circumferential direction of the first cell surface in a state of surrounding the first cell surface outside the first fold curve inside the outermost fold curve; ,
The plurality of second cell surfaces are adjacent to the first cell surface via the first folding line and are bent relative to the first cell surface, and are further adjacent to each other. The cell surfaces are bent in a state in which they are inclined in different directions via a second folding line formed at the boundary between the second cell surfaces,
The width of each second cell surface projected on the reference outer peripheral surface of the can body is set to 1.5 mm or more, and the area of the first cell surface projected on the reference outer peripheral surface of the can body is the can It is set to 0.1 to 0.5 times the total area of the area of the first cell surface projected on the reference outer peripheral surface of the cylinder and the total area of the plurality of second cell surfaces. Metal can. A metal can provided with one or more unit embossed patterns on the outer peripheral surface of the can body,
The unit embossed pattern is
A mountain-fold outermost fold curve formed on the outer peripheral edge of the unit embossed pattern and defining the unit embossed pattern;
A first cell surface disposed substantially parallel to a reference outer peripheral surface of the can body at a central portion inside the outermost peripheral folding line;
A valley-shaped first fold curve formed at the outer periphery of the first cell surface;
A plurality of second cell surfaces arranged side by side in the circumferential direction of the first cell surface in a state of surrounding the first cell surface outside the first fold curve inside the outermost fold curve; ,
The plurality of second cell surfaces are adjacent to the first cell surface via the first folding line and are bent relative to the first cell surface, and are further adjacent to each other. The cell surfaces are bent in a state in which they are inclined in different directions via a second folding line formed at the boundary between the second cell surfaces,
The width of each second cell surface projected on the reference outer peripheral surface of the can body is set to 1.5 mm or more, and the area of the first cell surface projected on the reference outer peripheral surface of the can body is the can It is set to 0.1 to 0.5 times the total area of the area of the first cell surface projected on the reference outer peripheral surface of the cylinder and the total area of the plurality of second cell surfaces. Metal can. The metal can according to claim 1 or 2, wherein a bending angle of the second cell surface with respect to the first cell surface is set in a range of 3 to 30 °. A metal can provided with one or more unit embossed patterns on the outer peripheral surface of the can body,
The unit embossed pattern is
An outermost folding line that is formed on the outer peripheral edge of the unit embossed pattern and divides the unit embossed pattern;
A first cell surface disposed substantially parallel to a reference outer peripheral surface of the can body at a central portion inside the outermost peripheral folding line;
A first folding line formed on an outer peripheral edge of the first cell surface;
A plurality of second cell surfaces arranged side by side in the circumferential direction of the first cell surface in a state of surrounding the first cell surface outside the first fold curve inside the outermost fold curve; ,
The plurality of second cell surfaces are adjacent to the first cell surface via the first folding line and are bent relative to the first cell surface, and are further adjacent to each other. The cell surfaces are bent in a state in which they are inclined in different directions via a second folding line formed at the boundary between the second cell surfaces,
The width of each second cell surface projected on the reference outer peripheral surface of the can body is set to 1.5 mm or more, and the area of the first cell surface projected on the reference outer peripheral surface of the can body is the can 0.1 to 0.5 times the total area of the area of the first cell surface projected on the reference outer peripheral surface of the cylinder and the total area of the plurality of second cell surfaces ,
The metal can, wherein a bending angle of the second cell surface with respect to the first cell surface is set in a range of 3 to 30 ° . A third cell surface is disposed outside the plurality of second cell surfaces inside the outermost peripheral folding curve so as to surround the plurality of second cell surfaces,
The third cell surface is bent relative to the plurality of second cell surfaces via a third folding line formed at a boundary between the third cell surface and the plurality of second cell surfaces. The metal can according to any one of claims 1 to 4 . The metal can according to any one of claims 1 to 5 , wherein a front shape of the outer peripheral contour line of the unit emboss pattern and a front shape of the outer peripheral contour line of the first cell surface are substantially similar to each other. It is a manufacturing apparatus of the metal can in any one of Claims 1-6 ,
An inner mold disposed inside the can body, and an outer mold disposed outside the can body and sandwiching the can body between the inner mold,
While either one of the molding convex part and the concave part is provided on the surface of the inner mold, the other is provided on the surface of the outer mold,
The molding convex part and the concave part are for forming a unit embossed pattern on the outer peripheral surface of the can body by fitting the molding convex part into the concave part through the can body,
The molding convex portion is inserted into the concave portion from between the bottom surface of the concave portion and the front end surface of the molding convex portion in a state of being fitted into the concave portion via a can body when a unit embossed pattern is molded. Over a region between the peripheral surface and the outer peripheral surface of the molding convex portion, it is formed in a size that produces a clearance larger than the thickness of the can body,
The opening peripheral edge of the recess functions as an outermost peripheral molding edge for forming an outermost peripheral folding curve,
A first molding surface that molds a first cell surface, a first ridge line that is formed on the outer peripheral edge of the first molding surface and that forms a first folding line, on the tip surface of the molding convex portion, and the first A plurality of second molding surfaces that are arranged outside one ridge line and that mold a plurality of second cell surfaces; and
The plurality of second molding surfaces are different from each other through second ridge lines that form the second folding line while the second molding surfaces adjacent to each other are formed at the boundary between the second molding surfaces. An apparatus for manufacturing a metal can, wherein the metal can is bent in a slanted state. Method for producing a metal can, characterized in that to produce a metal can according to any one of claims 1 to 6 using an apparatus for manufacturing a metal can according to claim 7 wherein.

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