WO2006067901A1 - ボトル缶の製造方法 - Google Patents
ボトル缶の製造方法 Download PDFInfo
- Publication number
- WO2006067901A1 WO2006067901A1 PCT/JP2005/017265 JP2005017265W WO2006067901A1 WO 2006067901 A1 WO2006067901 A1 WO 2006067901A1 JP 2005017265 W JP2005017265 W JP 2005017265W WO 2006067901 A1 WO2006067901 A1 WO 2006067901A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- peripheral wall
- skirt
- molding
- bottle
- wall portion
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 230000002093 peripheral effect Effects 0.000 claims abstract description 175
- 238000000465 moulding Methods 0.000 claims description 114
- 231100000241 scar Toxicity 0.000 claims 1
- 238000003825 pressing Methods 0.000 description 34
- 238000000034 method Methods 0.000 description 18
- 238000005452 bending Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 241001274197 Scatophagus argus Species 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 206010013642 Drooling Diseases 0.000 description 1
- 208000008630 Sialorrhea Diseases 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
- B65D1/023—Neck construction
- B65D1/0246—Closure retaining means, e.g. beads, screw-threads
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S72/00—Metal deforming
- Y10S72/715—Method of making can bodies
Definitions
- the present invention relates to a method for manufacturing a bottle can.
- a bottle can filled with a beverage or the like is formed as follows.
- a bottomed cylindrical body 1 is formed by drawing and ironing a metal plate having an aluminum alloy isotropic force, and then neck-in is formed in the opening of the cylindrical body 1.
- a large-diameter body 2 is connected to the upper end of the body 2 in the can axis direction, and the shoulder 3 is gradually reduced in diameter toward the upper side.
- a bottle can body 5 is formed which is connected to the upper end of the shoulder portion 3 and has a base portion 4 extending upward.
- FIG. 7C after the diameter of the base part 4 of the bottle can body 5 excluding the lower part 4a is once expanded, the diameter is gradually increased upward in the can axis direction.
- the bottle can body 5 shown in FIG. 7D is formed by shifting the processing position and reducing the diameter.
- the base portion 4 of the bottle can body 5 includes a skirt forming planned portion 4b that is connected to the upper end in the can axis direction of the lower portion 4a of the base portion and bulges radially outward, and an upper end of the skirt forming planned portion 4b.
- a male thread forming portion 4c that extends continuously and extends upward, and is connected to the upper end of the male screw forming portion 4c and has a curl forming portion 4d that has a smaller diameter than the planned forming portion 4c.
- the upper end portion in the can axis direction of the lower part 4a of the base part is a neck part planned planned part 4e having a smaller diameter than the skirt molded part 4b.
- the male screw part 6c is formed into the male screw part 4c and the inner surface of the skirt part 4b is formed.
- the curled portion 4d is bent outward in the radial direction to form the curled portion 8, and the bottle can having the base portion 111 is formed. 110 is formed.
- the skirt portion 112 gradually increases as it moves downward in the can axis direction.
- the first peripheral wall portion 112a having the next increased diameter and the lower end of the first peripheral wall portion 112a are connected to each other via a convex curved surface portion 112b that protrudes radially outward, and the diameter gradually decreases toward the bottom.
- the second peripheral wall portion 112c has a schematic configuration.
- the skirt portion 112 conventionally, only the planned molding portion of the convex curved surface portion 112b in the inner surface of the skirt molding planned portion 4b is pressed outward in the radial direction.
- Each of the first peripheral wall portion 112a and the second peripheral wall portion 112c is deformed so as to follow the deformation toward the surface, and is formed into the first peripheral wall portion 112a and the second peripheral wall portion 112c. Is molded.
- the configuration shown in Patent Document 1 below is known! / Speak.
- Patent Document 1 JP 2002-219539
- the size a of the skirt portion 112 in the can axis direction is not constant in the circumferential direction due to the helical shape of the male screw portion 6, as shown in FIG.
- the portion located at the end 6a at the lower end in the axial direction (hereinafter referred to as “circumferential position A”) is the smallest and gradually increases from this position A in the direction X in which the male thread 6 extends in the circumferential direction.
- the size “a” is the largest in the portion of the end portion 6a of the male screw portion 6 located in the vicinity of the opposite side of the extending direction X (hereinafter referred to as “circumferential position B”).
- first peripheral wall portion 112a the convex curved surface portion 112b, and the second peripheral wall portion 112c constituting the skirt portion 112
- the size of the first peripheral wall portion 112a in the can axis direction is the force in the circumferential direction as described above. Is different.
- the skirt portion 112 Due to the difference in the size a in the circumferential direction of the skirt portion 112, in the conventional method for forming the skirt portion, the skirt portion 112 is formed with high accuracy over the entire circumference. There was a problem that it was difficult. Specifically, the curvature radius R of the skirt portion 112 (convex curved surface portion 112b) at the circumferential position A and the skirt angle (the outer peripheral surface of the second peripheral wall portion 112c, or the direction in which the tangent line is orthogonal to the can axis) ⁇ force This skirt part 112 is molded with the smallest and highest accuracy, and the male thread part 6 gradually increases as it extends in the extending direction X. Decreases in the circumferential direction At position B, there was a problem when molding was performed with the largest and lowest accuracy.
- the buckling strength at the skirt portion 112 of the base portion 111 of the bottle can 110 is Due to the difference in the circumferential position of 110, the screwing accuracy of the cap to the base 111 is determined in the circumferential position in the capping process of screwing the cap onto the base 111 after filling the bottle can 110 with the contents. There was a possibility that it might be different.
- the present invention has been made in view of such circumstances, and an object of the present invention is to provide a method for manufacturing a bottle can that enables a skirt portion to be formed with high accuracy in a base portion.
- a method for manufacturing a bottle can includes: a can shaft connected to a base portion of a bottle can body and a lower end of a male screw portion;
- the first peripheral wall portion gradually increases in diameter as it goes downward in the direction, and is connected to the lower end of the first peripheral wall portion via a convex curved surface portion that protrudes radially outward and downward.
- the portion of the skirt portion located in the region is formed, not only the inner surface of the projected curved portion of the projected curved portion but also the first surface of the projected curved portion. Since the inner surface of the part to be molded of the peripheral wall part is also pressed outward in the radial direction, it is possible to prevent the shape of the skirt part located in the region from being sagged.
- the radius of curvature of the convex curved surface portion and the angle formed by the outer surface of the second peripheral wall portion or the tangent line thereof in the direction perpendicular to the can axis are set to be substantially uniform over the entire circumference.
- the part can be molded.
- the portion to be formed of the first peripheral wall portion may be supported by the outer surface side force.
- the inner surface corresponding to the outer surface is pressed radially outwardly while the planned portion of the first peripheral wall portion is supported by the outer surface side force, and the first skirt portion is pressed. Since it is molded on the peripheral wall portion, it is possible to suppress the extension in the can axis direction that occurs on the outer surface of the molding portion of the first peripheral wall portion during this molding. Therefore, this extension hinders deformation in the radially outward direction of the planned shape portion of the first peripheral wall portion, or the first peripheral wall portion has the above-mentioned slip. Pulling back can be surely prevented.
- the concave portion may extend continuously in the circumferential direction or may extend intermittently.
- the flare as the free end portion of the cap is made into the outer shape of the skirt portion by the skirt winding roll. It is pressed and molded inward in the radial direction so as to follow.
- the position in the can axis direction at the time of molding of the hem winding tool used at the time of molding with respect to the arranged bottle cans is generally set as follows.
- the base part of the bottle can is imaged by the side force imaging means to capture the contour line of the base part, and an extension line in contact with the second peripheral wall part at the contour line and the convex curved surface part
- the intersection point between the can axis in contact with the straight line parallel to the can axis is specified, and the distance in the can axis direction between this intersection point and the opening end surface of the base part is measured. And based on this measured value, the can axial direction position at the time of the said shaping
- Such a setting method has a problem that it is difficult to set the position of the tail winding roll with high accuracy. That is, the distance in the radial direction between the convex curved surface portion and the lower end portion in the can axis direction of the second peripheral wall portion is generally about 1.2 mm, and the second circumferential wall portion has both ends in the can axis direction. The part is curved and the straight part is about 0.3mn! Only about 0.6mm. Therefore, the setting method as described above has a problem that it is difficult to specify the extension line in contact with the second peripheral wall portion with high accuracy.
- the first peripheral wall portion is Since the concave portion is formed, the intersection point between the extension line in contact with the second peripheral wall portion and the straight line parallel to the can shaft in contact with the convex curved surface portion is specified, and this intersection point and the opening end surface in the base portion
- the concave portion can be more easily specified than the extension line in contact with the second peripheral wall portion, so that the setting can be performed easily and with high accuracy.
- this measurement is not limited to the method based on the contour line, and can be performed by, for example, a contact method. By adopting this contact method, the measurement can be performed with higher accuracy. be able to. As described above, the position in the can axis direction at the time of forming the tail winding roll can be set easily and with high accuracy.
- the molding portion of the second peripheral wall portion is radially outward from the inner surface side with the lower end portion in the can axis direction as a fulcrum. You may bend toward it.
- the convex curved surface is formed during the molding. It is possible to suppress the extension in the can axis direction that occurs on the outer surface of the part to be molded, and this extension hinders the deformation of the convex curved part to the outside in the radial direction, or Completion It is possible to reliably prevent occurrence of springback in the radially inward direction on the convex curved surface portion when releasing the radially outward pressure on the inner surface of the portion to be molded of the convex curved surface portion after forming. .
- a neck portion molding planned portion continuously provided at a lower end in the can axis direction of the molding portion of the second peripheral wall portion is formed on the inner surface side thereof. While supporting the force, the outer surface may be pressed radially inward to form the neck portion connected to the lower end of the skirt portion.
- the neck portion to be molded is pressed into the neck portion while pressing the outer surface corresponding to the inner surface while supporting the inner surface side force, the neck portion is formed during the molding. It becomes possible to suppress the extension in the can axis direction that occurs on the inner surface of the part to be molded, and this extension hinders deformation of the part to be molded in the radial direction inward in the radial direction, or molding of the neck after molding When releasing the radially inward pressing against the outer surface of the planned portion, it is possible to reliably prevent the spring back from radially occurring at the neck portion. Therefore, it is possible to mold the neck with high precision, and it is possible to prevent the distorted force of the neck from affecting the skirt, and to form the skirt more accurately. can do.
- the skirt portion can be formed with high accuracy in the base portion.
- FIG. 1 is an enlarged side view showing a bottle can formed by the bottle can manufacturing method shown as an embodiment of the present invention.
- FIG. 2 is an enlarged cross-sectional view of part F of the bottle can shown in FIG.
- FIG. 3 is a diagram for carrying out the method for manufacturing a bottle can shown as an embodiment of the present invention. It is a principal part expanded sectional view of this apparatus.
- FIG. 4 is a schematic side view showing an apparatus for carrying out the bottle can manufacturing method shown as an embodiment of the present invention, and is a view showing a first step.
- FIG. 5 is a schematic side view of the bottle can manufacturing apparatus shown in FIG. 4, showing the second step.
- FIG. 6 is an enlarged cross-sectional view of a main part of an apparatus for carrying out the bottle can manufacturing method shown as another embodiment of the present invention.
- FIG. 7 is a process diagram showing a process of forming a bottle can body with a bottomed cylindrical body strength.
- FIG. 8 is an enlarged side view showing a bottle can formed by the bottle can manufacturing method shown as a conventional example according to the present invention.
- the bottle can 20 is connected to a large-diameter barrel (not shown) and the upper end of the barrel in the can axis direction, and the diameter of the bottle can 20 is gradually reduced toward the top.
- the shoulder portion 23 and a base portion 22 that is continuous with the upper end of the shoulder portion 23 and extends upward are provided.
- the base part 22 has a curled part 8 formed by bending the opening end part radially outward, a male thread part 6 extending spirally in the circumferential direction at the center part of the base part 22 in the can axis direction,
- a skirt portion 7 is formed which is connected to the lower end of the male screw portion 6 in the can axis direction and bulges outward in the radial direction.
- the skirt portion 7 is connected to the lower end in the can axis direction of the male screw portion 6, and has a first peripheral wall portion 7a that is gradually expanded in diameter as it is directed downward, and the first peripheral wall portion 7a.
- a convex curved surface portion 7b that is continuous with the lower end of the convex surface and is convex outward in the radial direction, and a second peripheral wall portion 7c that is continuous with the lower end of the convex curved surface portion 7b and is gradually reduced in diameter as it goes downward.
- a neck portion 9 having a smaller diameter than the convex curved surface portion 7b and extending downward is continuously provided at the lower end of the second peripheral wall portion 7c, that is, the lower end of the skirt portion 7.
- the size a of the skirt portion 7 in the can axis direction is not constant in the circumferential direction due to the spiral shape of the male screw portion 6, as shown in FIG.
- the portion located at the end portion 6a at the lower end in the direction of the can axis (hereinafter referred to as “circumferential position A”) is the smallest.
- the size a is the largest in the vicinity of the end portion 6a of the male screw portion 6 on the opposite side to the extending direction X (hereinafter referred to as “circumferential position B”).
- the size of the first peripheral wall portion 7a in the can axis direction is described above in the circumferential direction.
- the size of the convex curved surface portion 7b and the second peripheral wall portion 7c in the can axis direction is made uniform over the entire circumference of the base portion 22! /
- the first peripheral wall portion 7a has at least about 180 from the end portion 6a at the lower end in the can axis direction of the male screw portion 6 toward the direction opposite to the direction X in which the male screw portion 6 extends in the circumferential direction.
- the portion located in the region of 0 ° it extends in the circumferential direction over the entire circumference of the first peripheral wall portion 7a.
- the existing recess 7d is formed.
- the distance in the can axis direction between the concave portion 7d and the convex curved surface portion 7b is substantially equal over the entire circumference of the base portion 22.
- the recess 7d of the present embodiment is formed on the entire periphery of the first peripheral wall portion 7a at a portion located below the end portion 6a of the male screw portion 6 in the can axis direction. Is formed continuously
- the concave portion 7d of the present embodiment is a concave groove that is curved inwardly in the radial direction only on the outer peripheral surface of the first peripheral wall portion 7a.
- the inner surface corresponding to is a smooth surface.
- the recess 7d is formed at a position about 1 to 2 mm away from the radially outer end of the convex curved surface portion 7b in the can axis direction.
- the size of the recess 7d in the can axis direction is 0.2 mm or less, and the radial direction between the outer peripheral surface of the first peripheral wall portion 7a and the outermost surface of the concave portion 7d that is located radially inwardly
- the distance, that is, the depth of the recess 7d is set to 0.02 mm to 0.10 mm.
- a bottle can manufacturing apparatus for forming the male screw portion 6, the skirt portion 7, and the neck portion 9 of the bottle can 20 configured as described above will be described. Since the bottle can body 5 used in this manufacturing apparatus is the same as the conventional one shown in FIGS. 7A to 7D, description thereof is omitted.
- the bottle can manufacturing apparatus 10 includes an inner molding piece 60 disposed inside the bottle can body base portion 4, and an outer portion disposed outside.
- a molding piece 50 is provided, and each of these molding pieces 60, 50 includes a skirt molding portion 12a, 12b and a male screw molding portion l la, l ib arranged coaxially with the skirt molding portion 12a, 12b.
- the lower part in the axial direction is the skirt molding parts 12a and 12b, and the upper part is the male screw molding parts lla and ib.
- each molding piece 60, 50 is supported so as to be able to approach and separate in the can axis direction and the radial direction with respect to the cap portion 4 of the arranged bottle can body 5, and is rotatable around the respective rotation axis. Supported! RU
- the skirt molding portion 12a of the inner molding piece 60 is referred to as “inner skirt molding portion 12a”, and the male screw molding portion 11a of the inner molding piece 60 is referred to as “inner male screw molding portion. 1 la ”, the skirt forming portion 12b of the outer forming piece 50 is referred to as“ outer skirt forming portion 12b ”t ⁇ , and the male screw forming portion l ib of the outer forming piece 50 is referred to as“ outer male screw forming portion l lb ”. From the above, as shown in FIG.
- each of these molding pieces 50, 60 is By moving close to each other, the male part 6, the skirt part 7, and the neck part 9 are formed on the base part 4 by rotating these 50 and 60 around the can axis while sandwiching the base part 4. It has become so.
- each male screw pressing portion l lc and l id of the present embodiment in the radial direction of the outer surface force of the male screw forming portion l la and l ib is the male screw to be formed. It is larger than the thread height E of part 6.
- the outer skirt forming portion 12b includes an outer pressing portion 102d that presses the outer surface of the neck portion forming planned portion 4e radially inward, at least a part of the first peripheral wall portion 7a, the convex curved surface portion 7b, and the second 2 Of the peripheral wall portion 7c, at least about 180 in the direction opposite to the direction X (see FIG.
- region a portion located in a region of 0 ° (hereinafter referred to as “region”), at least a part of the first peripheral wall portion 7a, the outer surface of each planned portion of the convex curved surface portion 7b and the second peripheral wall portion 7c And a support portion 12c that is pressed against and supports these 7a, 7b, and 7c.
- the lower surface in the can axis direction of the first peripheral wall portion 7a, the outer surfaces of the respective molding scheduled portions of the convex curved surface portion 7b and the second peripheral wall portion 7c are substantially continuous in the can axis direction.
- the outer pressing portion 102d is smoothly connected to the lower end in the axial direction while being pressed and configured to support these 7a, 7b and 7c.
- the outer skirt forming portion 12b of the present embodiment includes a first convex curved surface portion 12d that is connected to the upper end in the axial direction of the support portion 12c and gradually decreases in diameter as it goes upward in the axial direction.
- the connecting portion 12g of the first convex curved surface portion 12d and the support portion 12c is a curved surface radially outward.
- the curvature radius is about 0.5mn! ⁇ 2. Omm.
- the skirt portion 7 when the skirt portion 7 is molded, the outer surfaces of the lower portion of the first peripheral wall portion 7a, the projected curved surface portion 7b, and the second peripheral wall portion 7c are to be formed on the support portion 12c. It is pushed and supported.
- the inner skirt forming portion 12a described later presses the lower surface of the first peripheral wall portion 7a, the inner surface of each of the forming surface portions of the convex curved surface portion 7b and the second peripheral wall portion 7c radially outward, and The corresponding outer surface is supported by being pressed against the outer surface of the support portion 12c.
- the upper end force of the lower outer surface of the part to be molded of the first peripheral wall portion 7a is pressed inward in the radial direction by the connecting portion 12g of the first convex curved surface portion 12d.
- the inner skirt forming portion 12a of the present embodiment is a first portion that presses the inner surface of the first peripheral wall portion 7a in the can axial direction lower portion and the inner surface of each projected portion of the convex curved surface portion 7b outward in the radial direction.
- the first inner pressing portion 12e and the bent portion 12f are smoothly connected in the axial direction.
- the first inner pressing portion 12e and the bent portion 12f are formed on the outer peripheral surface of the inner skirt forming portion 12a over the entire circumference. Furthermore, in the present embodiment, the inner skirt molding portion 12a includes a second inner pressing portion 12h that presses the inner surface of the first circumferential wall portion 7a in the can axis direction upper portion in the can axis direction outward in the radial direction.
- the rotation axis of the inner molding piece 60 substantially coincides with the central axis O of the apparatus 10, and the outer diameter of the inner molding piece 60 is made smaller than the inner diameter of the bottle can base part 4,
- the outer forming piece 50 is located at a position where the distance between the rotation axis and the outer peripheral surface of the bottle body 4 is larger than the radius of the outer forming piece 50. 60 and the outer molding piece 50 are moved forward toward the bottle can body 5 in the direction of the can axis.
- the side molding piece 60 is arranged inside the bottle can base 4 and the outside molding piece 50 is arranged outside the bottle can base 4.
- the inner molding piece 60 is moved outward in the radial direction of the bottle can body 5 by the driving means (not shown), and the outer molding piece 50 is moved inward in the radial direction of the bottle can body 5.
- the base 4 is sandwiched between the outer surfaces of the molding pieces 50 and 60 as shown in FIG.
- the male thread forming part 4c is sandwiched between the inner and outer male thread forming parts l la and l ib, and the skirt forming part 4b is sandwiched between the inner and outer skirt forming parts 12a and 12b.
- the thread portion 6c is molded.
- the outer surface is pressed radially inward by the male screw pressing portion l id of the outer male screw forming portion l ib to form the valley portion 6b.
- the inner peripheral surface of the valley portion 6b is not in contact with the outer peripheral surface of the inner male screw forming portion 11a, and the outer peripheral surface of the screw thread portion 6c is not in contact with the outer peripheral surface of the outer male screw forming portion l ib. It is said.
- the lower part in the can axis direction of the first peripheral wall part 7a and the respective molding planned parts of the convex curved surface part 7b are the first inner presses of the inner skirt molding part 12a.
- the part 12e is pressed outward in the radial direction
- the part to be molded of the second peripheral wall part 7c is directed outward in the radial direction by the bent part 12f of the inner skirt molding part 12a with the lower end part as a fulcrum. It can be bent.
- the upper inner surface force in the can axis direction of the portion to be molded of the first peripheral wall portion 7a is pressed outward in the radial direction by the second inner pressing portion 12h of the inner skirt forming portion 12a.
- the lower end force in the can axis direction at the molding target portion of the second peripheral wall portion 7c is radially inward by the outer pressing portion 102d of the outer skirt molding portion 12b.
- the first molding part of the first peripheral wall part 7a is pressed against the support part 12c of the outer skirt molding part 12b and supported by the molding part of the convex curved part 7b and the second peripheral wall part 7c. Is done.
- the upper end portion of the outer surface of the lower portion in the can axis direction of the first peripheral wall portion 7a that is, the lower position force in the can axis direction from the end portion 6a of the male screw portion 6, the outer force of the outer skirt forming portion 12b 1 Pressed radially inward by the connecting portion 12g of the convex curved surface portion 12d.
- the neck forming portion 4e is connected to the lower end of the bent portion 12f of the inner skirt forming portion 12a in a state where the inner surface thereof is unconstrained, and the neck portion is scheduled to be formed on the outer pressing portion 102d.
- the outer surface is pressed radially inward by the outer pressing portion 102d in a state where it is not in contact with the outer surface of the portion lOld that faces the portion 4e.
- the apparatus 10 is rotated around its central axis O in a state where the bottle can body cap 4 is sandwiched between the outer and inner molding pieces 50, 60, so that the cap 4
- the male thread part 6, the skirt part 7, and the neck part 9 are formed over the entire circumference.
- the upper end portion of the lower outer surface of the portion to be molded of the first peripheral wall portion 7a is directed radially inward by the connecting portion 12g of the first convex curved surface portion 12d over the entire circumference.
- the entire periphery of the outer peripheral surface of the first peripheral wall portion 7a is placed on the portion positioned below the end portion 6a of the male screw portion 6 as shown in FIGS.
- a recess 7d extending continuously is formed.
- the opening end of the bottle can base 4 is folded outward in the radial direction to form the curled portion 8, and the bottle can 20 shown in FIGS. 1 and 2 is formed.
- the convex curved surface portion of the planned skirt forming portion 4b Since not only the inner surface of the part to be molded of 7b but also the inner surface of the part to be molded of the first peripheral wall part 7a is pressed outward in the radial direction, the shape of the skar part 7 located in the region is You can prevent drooling.
- the radius of curvature R of the convex curved surface portion 7b and the angle ⁇ formed by the outer surface of the second peripheral wall portion 7c or its tangent line in the direction perpendicular to the can axis are substantially equal in magnitude over the entire circumference.
- the scat part 7 can be molded as follows.
- the portion to be formed of the first peripheral wall portion 7a corresponds to the outer surface in a state of being supported from the outer surface side by the support portion 12c. Since the inner surface is pressed radially outward by the first inner pressing portion 12e and formed on the first peripheral wall portion 7a of the skirt portion 7, the outer peripheral portion of the first peripheral wall portion 7a is not formed. It is possible to suppress the extension in the can axis direction generated on the surface, and this extension inhibits the deformation of the first peripheral wall portion 7a toward the outside in the radial direction or causes the spring back. Can be surely prevented.
- the recess 7d is formed in the first peripheral wall 7a when the portion located in the region of the skirt 7 is formed, the inner peripheral portion of each of the first peripheral wall 7a and the projected curved surface 7b is to be formed. It is possible to prevent the pressing force directed outward in the radial direction with respect to the surface from being distributed upward in the can axis direction from the recess 7d. Therefore, this pressing force can be applied intensively to the lower part of the first peripheral wall part 7a located below the concave part 7d and to each forming part of the convex curved part 7b, and the skirt part located in the region It is possible to reliably prevent the shape of 7 from sagging.
- the molding predetermined portion of the second peripheral wall portion 7c is bent, so that the lower end portion in the can axis direction of the second peripheral wall portion 7c to be formed is work-hardened. It becomes possible to make it.
- the first peripheral wall portion 7a and the convex curved surface portion 7b toward the outer surface in the radial direction with respect to the inner surface of each planned molding portion is released after the molding, the first peripheral wall portion 7a and the convex curved surface portion 7b are radially Even when an inward springback is about to occur, the lower end portion in the can axis direction of the work-cured second peripheral wall portion 7b acts as a reinforcing portion that resists this spring knock. Is possible.
- the inner surface corresponding to the outer surface is formed with the diameter of the projected curved portion 7b being supported from the outer surface side. Since it is pressed outward in the direction and molded into the convex curved surface portion 7b, it is possible to suppress the extension in the can axis direction that occurs on the outer surface of the portion to be molded of the convex curved surface portion 7b during this molding, This extension hinders deformation of the projected curved surface portion 7b toward the outside in the radial direction or presses the radially outward surface against the inner surface of the projected curved surface portion 7b after molding. When released, it is possible to reliably suppress the occurrence of springback directed radially inward on the convex curved surface portion 7b.
- the part to be molded of the second peripheral wall part 7c is bent in a state of being supported from the outer surface side, at the time of the molding, at the lower end part of the part to be molded of the second peripheral wall part 7c It becomes possible to suppress the compressive strain along the extending direction of the longitudinal cross-sectional shape generated on the outer surface.
- the bending of the second peripheral wall portion 7c after the molding is released is canceled, It is possible to prevent the second peripheral wall portion 7c from springing back upward in the can axis direction.
- the outer surface of the peripheral wall portion 7a is formed by the connecting portion 12g of the first convex curved surface portion 12d of the outer skirt forming portion 12b. It is pressed toward the inside in the radial direction, and the inner surface corresponding to this is the inner skirt molding part. It is pressed radially outward by the first inner pressing portion 12e of 12a, and the inner and outer surfaces are firmly held.
- each of the first peripheral wall portion 7a and the convex curved surface portion 7b is scheduled to be formed at the time of forming the scat portion 7. It is possible to prevent the pressing force directed radially outward with respect to the inner surface of the portion from being distributed above the concave portion 7d in the can axis direction and below the lower end portion of the second peripheral wall portion 7c.
- This pressing force can be intensively applied to the lower portion of the first peripheral wall portion 7a and the respective molding scheduled portions of the convex curved surface portion 7b located between the concave portion 7d and the lower end portion of the second peripheral wall portion 7c. Therefore, the skirt portion 7 can be formed with higher accuracy.
- the inner peripheral surface of the valley portion 6b and the outer peripheral surface of the screw thread portion 6c are not in contact with the respective male screw forming portions lla and lib. Therefore, it is possible to prevent the male screw part 6 from being compressed and deformed in the thickness direction at the time of molding, and to reduce the thickness of the male screw part 6, and to prevent the buckling strength of the male screw part 6 from being lowered. Can do.
- the lower part of the first peripheral wall part 7a, the inner and outer surfaces of the convex curved part 7b and the second peripheral wall part 7c are sandwiched between the molding pieces 50 and 60 in this embodiment. Since the male thread portion 6 is molded, it becomes possible to secure the necessary restraint of the molding pieces 50 and 60 by the bottle can body cap portion 4, and the tilting force of the rotation axis during the molding cap portion 4 It is possible to suppress variation at each circumferential position. Therefore, it is possible to suppress the variation in the circumferential position of the thread height E, and the highly accurate male thread portion 6 can be formed.
- the skirt portion 7 is molded while the portion to be molded of the second peripheral wall portion 7c is bent outwardly in the inner surface side radial direction with the lower end portion in the can axis direction as a fulcrum.
- the male threaded portion 6 is formed, and each skirt forming portion 12a, 12b comes into surface contact with the inner and outer surfaces of the second peripheral wall portion 7c, so that each skirt forming portion 12a, 12b is in contact with the respective rotation axis during molding. Even if it is inclined, the surface contact makes it possible to prevent this inclination from occurring due to the frictional force generated between the bottle can base 4 and the molding pieces 50, 60, and a highly accurate male screw. Part 6 can be reliably molded.
- the standard deviation of the angle ⁇ was 3.398, whereas in the bottle can 20 of this embodiment, it was 1.549.
- the standard deviation of the thread height E was 0.075, whereas in the bottle can 20 of this embodiment, it was 0.021.
- the recess 7d is a concave groove that is recessed in a curved shape radially inward only on the outer peripheral surface of the first peripheral wall portion 7a, and the inner peripheral surface corresponding to this position is
- the concave portion 7d may be formed by denting not only the outer peripheral surface of the first peripheral wall portion 7a but also the inner peripheral surface inward in the radial direction.
- the shape in the longitudinal sectional view may be, for example, a V shape, and is not limited to these shapes.
- the concave portion 7d is continuously formed over the entire circumference of the first peripheral wall portion 7a at a portion located below the end portion 6a of the male screw portion 6 in the can axis direction.
- the formation position in the can axis direction is not particularly limited as long as it is formed at least in a portion located in the 180 ° region.
- the recesses 7d are intermittently scattered in the circumferential direction on the first peripheral wall 7a. Let them form.
- the recess 7d is formed by pressing the outer surface of the part to be molded of the first peripheral wall 7a located in the region toward the inside in the radial direction.
- the recess 7d is formed. You don't have to.
- the skirt portion 7 located in the region is formed, the inner surface of the first peripheral wall portion 7a and the convex curved surface portion 7b is directed radially outward while the outer surface side is supported.
- the first peripheral wall portion 7a and the convex curved surface portion 7b are formed by pressing, the inner surface may be pressed radially outward without supporting the outer surface side.
- the second peripheral wall portion is formed by bending the planned shape portion of the second peripheral wall portion 7c from the inner surface side while supporting the outer surface side thereof.
- the inner surface side may be bent without supporting the outer surface side, or the inner and outer surfaces of the part to be molded are unconstrained, and the first peripheral wall portion 7a and the convex curved surface portion 7b
- the inner surface of each part to be molded is pressed outward in the radial direction, and the deformation behavior of the first peripheral wall portion 7a and the convex curved surface portion 7b in the radial outward direction is caused by the deformation of the second peripheral wall portion 7c.
- the second peripheral wall 7c may be formed by deforming the part to be formed so as to follow.
- the inner skirt forming part 21 having no bent part 12f is adopted, the inner surface of the part to be formed of the second peripheral wall part 7c is made unconstrained, and the others are shown in FIG.
- the skirt portion 7 may be formed in the same manner as the embodiment shown.
- the inner surface of the neck forming planned portion 4e is unconstrained and the outer surface is pressed radially inward to form the neck 9 at least in the region of the skirt portion 7.
- the neck portion 9 when the neck portion 9 is formed, it is possible to suppress the extension in the can axis direction that occurs on the inner surface of the neck portion formation planned portion 4e, and the neck portion is scheduled to be formed radially inward by this extension. It is possible to prevent deformation of the portion 4e or prevent the neck portion 9 from springing back radially outward when the molding pieces 50, 60 are separated from the base portion 22 after molding. Become. As a result, the neck 9 can be molded with high accuracy, and the distorted force of the shape of the neck 9 can be prevented from affecting the skirt 7, and the skirt 7 can be molded with high accuracy. This can be realized more reliably.
- a bottle can manufacturing method that enables the skirt part to be formed with high accuracy in the base part is provided.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/722,227 US8091402B2 (en) | 2004-12-24 | 2005-09-20 | Method of manufacturing bottle can |
EP05785575A EP1829785B1 (en) | 2004-12-24 | 2005-09-20 | Method of manufacturing bottle can |
DE602005018542T DE602005018542D1 (de) | 2004-12-24 | 2005-09-20 | Verfahren zur herstellung einer flaschenartigen dose |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-373165 | 2004-12-24 | ||
JP2004373165A JP4667854B2 (ja) | 2004-12-24 | 2004-12-24 | ボトル缶およびその製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006067901A1 true WO2006067901A1 (ja) | 2006-06-29 |
Family
ID=36601511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/017265 WO2006067901A1 (ja) | 2004-12-24 | 2005-09-20 | ボトル缶の製造方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8091402B2 (ja) |
EP (1) | EP1829785B1 (ja) |
JP (1) | JP4667854B2 (ja) |
CN (1) | CN100564168C (ja) |
DE (1) | DE602005018542D1 (ja) |
WO (1) | WO2006067901A1 (ja) |
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US7818987B2 (en) | 2006-03-31 | 2010-10-26 | Belvac Production Machinery, Inc. | Method and apparatus for trimming a can |
US7886894B2 (en) | 2006-03-31 | 2011-02-15 | Belvac Production Machinery, Inc. | Method and apparatus for bottle recirculation |
US7905130B2 (en) | 2006-03-31 | 2011-03-15 | Belvac Production Machinery, Inc. | Apparatus for threading cans |
US7963139B2 (en) | 2006-03-31 | 2011-06-21 | Belvac Production Machinery, Inc. | Apparatus for can expansion |
WO2012144490A1 (ja) * | 2011-04-19 | 2012-10-26 | ユニバーサル製缶株式会社 | ねじ付きボトル缶の製造方法及び製造装置 |
US9290329B2 (en) | 2008-04-24 | 2016-03-22 | Crown Packaging Technology, Inc. | Adjustable transfer assembly for container manufacturing process |
US9308570B2 (en) | 2008-04-24 | 2016-04-12 | Crown Packaging Technology, Inc. | High speed necking configuration |
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Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
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US7886894B2 (en) | 2006-03-31 | 2011-02-15 | Belvac Production Machinery, Inc. | Method and apparatus for bottle recirculation |
US7905130B2 (en) | 2006-03-31 | 2011-03-15 | Belvac Production Machinery, Inc. | Apparatus for threading cans |
US7918328B2 (en) | 2006-03-31 | 2011-04-05 | Belvac Production Machinery, Inc. | Method and apparatus for bottle recirculation |
US7950259B2 (en) | 2006-03-31 | 2011-05-31 | Belvac Production Machinery, Inc. | Method and apparatus for trimming a can |
US7963139B2 (en) | 2006-03-31 | 2011-06-21 | Belvac Production Machinery, Inc. | Apparatus for can expansion |
US7818987B2 (en) | 2006-03-31 | 2010-10-26 | Belvac Production Machinery, Inc. | Method and apparatus for trimming a can |
US8505350B2 (en) | 2006-03-31 | 2013-08-13 | Belvac Production Machinery, Inc. | Apparatus for threading cans |
US9308570B2 (en) | 2008-04-24 | 2016-04-12 | Crown Packaging Technology, Inc. | High speed necking configuration |
US10751784B2 (en) | 2008-04-24 | 2020-08-25 | Crown Packaging Technology, Inc. | High speed necking configuration |
US9968982B2 (en) | 2008-04-24 | 2018-05-15 | Crown Packaging Technology, Inc. | High speed necking configuration |
US9290329B2 (en) | 2008-04-24 | 2016-03-22 | Crown Packaging Technology, Inc. | Adjustable transfer assembly for container manufacturing process |
WO2012144490A1 (ja) * | 2011-04-19 | 2012-10-26 | ユニバーサル製缶株式会社 | ねじ付きボトル缶の製造方法及び製造装置 |
JP5887340B2 (ja) * | 2011-04-19 | 2016-03-16 | ユニバーサル製缶株式会社 | ねじ付きボトル缶の製造方法及び製造装置 |
JPWO2012144490A1 (ja) * | 2011-04-19 | 2014-07-28 | ユニバーサル製缶株式会社 | ねじ付きボトル缶の製造方法及び製造装置 |
Also Published As
Publication number | Publication date |
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JP4667854B2 (ja) | 2011-04-13 |
DE602005018542D1 (de) | 2010-02-04 |
JP2006176183A (ja) | 2006-07-06 |
US20090211329A1 (en) | 2009-08-27 |
EP1829785A4 (en) | 2009-03-18 |
EP1829785B1 (en) | 2009-12-23 |
US8091402B2 (en) | 2012-01-10 |
CN101084150A (zh) | 2007-12-05 |
CN100564168C (zh) | 2009-12-02 |
EP1829785A1 (en) | 2007-09-05 |
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