Bottle-shaped can manufacturing method and bottle-shaped can
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B21D-022/26
B21D-051/00
출원번호
UP-0577471
(2005-03-11)
등록번호
US-7555927
(2009-07-15)
우선권정보
JP-2004-305533(2004-10-20)
국제출원번호
PCT/JP05/004327
(2005-03-11)
§371/§102 date
20070418
(20070418)
국제공개번호
WO06/043347
(2006-04-27)
발명자
/ 주소
Hanafusa, Tatsuya
Ito, Ryoichi
Hosoi, Masahiro
Hasegawa, Takashi
출원인 / 주소
Universal Can Corporation
대리인 / 주소
Darby & Darby P.C.
인용정보
피인용 횟수 :
6인용 특허 :
2
초록▼
In a bottle-shaped can manufacturing method and a bottle-shaped can, a necking process is performed on an opening portion of a cylindrical workpiece with a bottom several times to form a body, a shoulder, and a portion for forming a neck that is continuously connected to an upper end of the shoulder
In a bottle-shaped can manufacturing method and a bottle-shaped can, a necking process is performed on an opening portion of a cylindrical workpiece with a bottom several times to form a body, a shoulder, and a portion for forming a neck that is continuously connected to an upper end of the shoulder in the axial direction of the bottle-shaped can and extends upward, and a first convex is formed in at least one of a connection portion between the shoulder and the portion for forming the neck and a connection portion between the shoulder and the body. Then, the shoulder is pressed to the inside of the body while the first convex is recessed inward in the radial direction, thereby forming grooves in the shoulder.
대표청구항▼
The invention claimed is: 1. A method of manufacturing a bottle-shaped can including a body having a large diameter, a shoulder that is continuously connected to an upper end of the body in an axial direction of the body and is tapered upward, a neck that is continuously connected to an upper end o
The invention claimed is: 1. A method of manufacturing a bottle-shaped can including a body having a large diameter, a shoulder that is continuously connected to an upper end of the body in an axial direction of the body and is tapered upward, a neck that is continuously connected to an upper end of the shoulder in the axial direction and extends upward, and a cap that is engaged with a male screw formed on the neck, comprising: performing a necking process on an opening portion of a cylindrical workpiece with a bottom and the body several times to form the body, the shoulder, and a portion for forming the neck that is continuously connected to the upper end of the shoulder in the axial direction and extends upward; forming a first convex in at least one of a connection portion between the shoulder and the portion for forming the neck and a connection portion between the shoulder and the body such that the first convex protrudes outward in a radial direction from the entire circumference of the connection portion; pressing a line linking the upper end to a lower end of the shoulder in a direction in which the shoulder is inclined to an inside of the bottle-shaped can to form, in a circumferential direction of the shoulder, a plurality of grooves extending in an inclined direction; pressing a lower end of the line with a mold surface having a triangular shape, with one vertex of the triangular mold surface disposed at the lower end of the line; and pressing a point on the line where the first convex is disposed to be recessed inward in the radial direction. 2. The method of manufacturing a bottle-shaped can in accordance with claim 1, wherein the first convex is formed in the connection portion between the shoulder and the portion for forming the neck, and the line links the recessed portion of the first convex to the portion pressed by the one vertex of the triangular mold surface in the direction in which the shoulder is inclined. 3. The method of manufacturing a bottle-shaped can in accordance with claim 1, wherein after the shoulder and the portion for forming the neck are formed, pressing a portion from the upper end of the shoulder to the lower end of the portion for forming the neck inward in the radial direction such that the width of the portion is reduced, thereby forming the first convex in the connection portion between the shoulder and the portion for forming the neck, and pressing the shoulder to the inside of the body while the first convex is being pressed inward in the radial direction, thereby forming the grooves. 4. The method for manufacturing a bottle-shaped can in accordance with claim 1, wherein a cylindrical mold having an inner circumferential surface that is formed substantially in the same shape as that of the shoulder and a plurality of pressure portions, each extending substantially in the inclined direction of the shoulder, that are formed in the circumferential direction on the inner circumferential surface so as to protrude inward in the radial direction is arranged so as to coaxially face the opening portion of the cylindrical workpiece with the bottom, and moving the mold and the cylindrical workpiece with the bottom close to each other in the axial direction of the cylindrical workpiece with the bottom such that the opening portion of the cylindrical workpiece with the bottom is inserted into the mold and the pressure portions are pressed against the shoulder, thereby forming in the circumferential direction the plurality of grooves satisfying the following Expression: L1=h/cos α, a1=2·r·sin(360°/(2·n)), a2=2·sin(360°/(2·n))·(r-h·tan α), L2=a2·L1/(a1-a2), and θ=2·arc sin(a2/2·L), wherein L1: the length of the shoulder in the inclined direction, a1: the width of a lower end of the groove in the axial direction of the bottle-shaped can, a2: the width of an upper end of the groove in the axial direction of the bottle-shaped can, L2: the distance between the upper end of the shoulder in the axial direction of the bottle-shaped can and an intersection point between two extension lines of both ends of the groove in the circumferential direction that extend upward in the axial direction of the bottle-shaped can, n: the number of grooves (8≦n≦22), r: the radius of an outer circumferential surface of the body, h: the length of the shoulder in the axial direction of the bottle-shaped can, and α: an angle formed between the axis of the bottle-shaped can and the outer circumferential surface of the shoulder, and θ: an angle formed by extending the two ends of the groove upward in the axial direction. 5. The method of manufacturing a bottle-shaped can in accordance with claim 1, wherein after the grooves are formed, performing a drawing process on a part of the portion for forming the neck other than the lower end in the axial direction to reduce the diameter of the part, thereby forming a second convex protruding outward in the radial direction at the lower end in the axial direction, the lower end in the axial direction being a part of the portion for forming the neck. 6. The method of manufacturing a bottle-shaped can in accordance with claim 1, wherein after the first convex is formed, performing a drawing process on a part of the portion for forming the neck other than the lower end in the axial direction to reduce the diameter of the part, thereby forming a second convex protruding outward in the radial direction at the lower end in the axial direction, the lower end in the axial direction being a part of the portion for forming the neck, and thereafter the grooves are formed. 7. The method of manufacturing a bottle-shaped can in accordance with claim 1, wherein the grooves are formed under the condition that an internal pressure of the bottle-shaped can is in the range of 0.05 MPa to 0.70 MPa. 8. A bottle-shaped can comprising: a body that has a large diameter; a shoulder that is continuously connected to an upper end of the body in an axial direction of the body and is tapered upward; a neck that is continuously connected to an upper end of the shoulder in the axial direction and extends upward; and a cap that is engaged with a male screw formed on the neck, wherein the bottle-shaped can is formed by the bottle-shaped can manufacturing method in accordance with to claim 1, a portion of a groove other than a lower end in a direction in which the shoulder is inclined is formed in a V shape in sectional view in a direction orthogonal to the axis of the bottle-shaped can, the lower end of the groove in an inclined direction has a triangular shape as viewed from the outside in a radial direction, and one of three vertexes of the triangle is disposed at an upper end in the inclined direction and a lower end of the V-shaped bottom in the inclined direction, and the remaining two vertexes are disposed at both ends of a lower end of the shoulder in the inclined direction.
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이 특허에 인용된 특허 (2)
Johnson Brian D. ; O'Brien Frank L. ; Carr Randall E. ; Ellis Larry W., Apparatus and method for the registered embossing of containers.
Siles, John L.; van de Liefvoort, Matthias K.; Jentzsch, Kevin Reed, Aluminum impact extruded bottle with threaded neck made from recycled aluminum and enhanced alloys.
Siles, John L.; van de Liefvoort, Matthias K.; Jentzsch, Kevin Reed, Aluminum impact extruded bottle with threaded neck made from recycled aluminum and enhanced alloys.
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