Can body for laminated steel sheet two-piece can and method for manufacturing can body
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B21D-022/30
B21D-022/20
출원번호
US-0990375
(2006-08-10)
등록번호
US-8365570
(2013-02-05)
우선권정보
JP-2005-234552 (2005-08-12)
국제출원번호
PCT/JP2006/316114
(2006-08-10)
§371/§102 date
20080212
(20080212)
국제공개번호
WO2007/020946
(2007-02-22)
발명자
/ 주소
Kubo, Hiroshi
Kojima, Katsumi
Nishihara, Yuka
Yasue, Yoshihiko
Iwasa, Hiroki
출원인 / 주소
JFE Steel Corporation
인용정보
피인용 횟수 :
1인용 특허 :
13
초록▼
A method for manufacturing a can body by forming a circular laminated steel sheet having a radius of R0 includes producing a form at least one time with a laminated steel sheet coated with a polyester resin, which has a plane orientation coefficient of 0.06 or less such that that the height h, the m
A method for manufacturing a can body by forming a circular laminated steel sheet having a radius of R0 includes producing a form at least one time with a laminated steel sheet coated with a polyester resin, which has a plane orientation coefficient of 0.06 or less such that that the height h, the maximum radius r, and the minimum radius d of the form satisfy d≦r, 0.2≦d/R≦0.5, and 1.5≦h/(R−r)≦2.5, where R represents the radius of the laminated steel sheet having a weight equivalent to the weight of a final form; heating the resulting form at least one time at a temperature of 150° C. or higher, and lower than or equal to the melting point of the polyester resin; and working the heat-treated form into a form satisfying d≦r, 0.1≦d/R≦0.25, and 1.5≦h/(R−r)≦4.
대표청구항▼
1. A method of manufacturing a can body for a two-piece can with multistage forming of a circular laminated steel sheet having a radius of R0, comprising: producing at least two forms by stepwise drawing a laminated steel sheet coated with a polyester resin, which has a plane orientation coefficient
1. A method of manufacturing a can body for a two-piece can with multistage forming of a circular laminated steel sheet having a radius of R0, comprising: producing at least two forms by stepwise drawing a laminated steel sheet coated with a polyester resin, which has a plane orientation coefficient of 0.06 or less such that height h, maximum radius r, and minimum radius d of the form satisfy 0.2≦d/R≦0.5, and 1.5≦h/(R−r) ≦2.5, where R represents radius of the laminated steel sheet having a weight equivalent to the weight of a final form;an intermediate forming stage comprising heat-treating the resulting forms after each drawing at a temperature of 150° C. or higher, and lower than or equal to the melting point of the polyester resin; andworking the heat-treated form into a form satisfying d≦r, 0.1≦d/R≦0.25, and 1.5≦h/(R−r)≦4,wherein the polyester resin is a resin in which primary components of polymerization are terephthalic acid and at least one diol selected from the group consisting of ethylene glycol and butylene glycol and wherein the polyester resin further comprises an incompatible resin having a glass transition point of 5° C. or lower as a subphase. 2. The method according to claim 1, wherein the polyester resin is a copolymer in which a secondary component is at least one selected from the group consisting of diethylene glycol, cyclohexanediol, and isophthalic acid. 3. A method for manufacturing a two-piece can with multistage forming of a circular sheet of a laminated steel sheet to finally produce a final form having a height h, a maximum radius r, and a minimum radius d (including when r and d are equal), comprising: providing a laminated steel sheet coated with a polyester resin having a plane orientation coefficient of 0.06 or less and wherein the polyester resin is a resin in which primary components of polymerization are terephthalic acid and at least one diol selected from the group consisting of ethylene glycol and butylene glycol wherein the polyester resin further comprises an incompatible resin having a glass transition point of 5° C. or lower as a subphase; andstepwise drawing the laminated steel sheet within a range suitable for allowing the height h, the maximum radius r, and the minimum radius d of the final form to satisfy the relationships of 0.1≦d/R≦0.25 and 1.5≦h/(R−r)≦4 relative to the radius R of the circular sheet before forming, the weight of the circular sheet being equivalent to the weight of the final form; andheat-treating each resulting form such that temperature of the form becomes 150° C. or higher, and lower than or equal to the melting point of the polyester resin, in an intermediate forming stage in which the height h, the maximum radius r, and the minimum radius d of the form in the intermediate forming stage satisfy the relationships of 0.2≦d/R≦0.5 and 1.5≦h/(R −r)≦2.5 relative to the radius R. 4. A method of manufacturing a can body for a two-piece can with multistage forming of a circular laminated steel sheet having a radius of R0, comprising: producing a form at least one time by using a laminated steel sheet coated with a polyester resin, which has a plane orientation coefficient of 0.06 or less such that height h, maximum radius r, and minimum radius d of the form satisfy 0.2≦d/R≦0.5, and 1.5≦h/(R−r) ≦2.5, where R represents radius of the laminated steel sheet having a weight equivalent to the weight of a final form;heat-treating the resulting form at least one time at a temperature of 150° C. or higher such that the temperature of the heat-treating is higher than or equal to the melting point of the polyester resin −30° C., and working condition of the heat-treated form is d≦r, 0.1≦d/R≦0.25, and 2.0≦h/(R−r)≦4, and lower than or equal to the melting point of the polyester resin; and lower than or equal to the melting point of the polyester resin; andworking the heat-treated form into a form satisfying d≦r, 0.1≦d/R≦0.25, and 1.5≦h/(R−r)≦4.
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이 특허에 인용된 특허 (13)
Saunders William T. (Weirton WV), In-line control during draw-redraw of one-piece sheet metal can bodies.
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