[특허]Method and apparatus for introducing differential stresses in endless flexible metallic casting belts for enhancing belt

[미국특허] Method and apparatus for introducing differential stresses in endless flexible metallic casting belts for enhancing belt 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B22D-027/02
출원번호	US-0221230 (1988-07-19)
발명자 / 주소	Bergeron Norman J. (Burlington VT) Wood J. F. B. (Burlington VT) Hazelett R. W. (Colchester VT)
출원인 / 주소	Hazelett Strip-Casting Corporation (Colchester VT 02)
인용정보	피인용 횟수 : 8 인용 특허 : 10

초록 ▼

The wide, thin, revolvable, flexible, metallic casting belts are made to incorporate differential patterns of residual internal longitudinal tensile and compressive stresses. The two marginal areas are residually longitudinally stretched more than the main middle area straddled by these margins. This main middle area is used as a moving mold and is expected to contact molten metal. Thus, the treated belts have two marginal areas in a state of mild longitudinal compression straddling the main middle area in a state of mild residual longitudinal tension. During casting, when hot metal comes into contact with the main middle area of such treated belt, the main middle area expands. Because of the built-in differential compensating stresses, the stresses throughout such belt during casting advantageously become balanced or equalized across the whole belt width. This equalized stress condition during casting assures that the critical moving belt mold area will be flatter than experienced with belts not having differential stress treatment. Thus, cast metal product typically will be improved in flatness, surface finish, section uniformity, soundness and metallurgy. Two methods are described for longitudinally stretching marginal areas relative to the middle area: (A) Use a work roller effectively of larger diameter toward its end than its middle for stretching both margins relative to the main middle area; (B) Use conventional cylindrical work rollers and heat (for expanding and slacking) the middle area during roller-stretching while leaving cold margins for residually stretching both margins relative to the main middle area.

대표청구항 ▼

In the treatment of a wide, thin, endless, flexible, metallic casting belt adapted to be revolved under tension for travelling through a moving mold and having a main middle area for providing a moving wall in the moving mold for continuous casting of hot molten metal in the moving mold, said main middle area being straddled by two marginal areas, and wherein the main middle area of the casting belt becomes heated by the molten metal, causing the main middle area to expand and slacken in the moving mold relative to the two marginal areas, thereby causing lack of flatness of the main middle area of the belt and resulting in cast product issuing from the moving mold having inferior surface finish, and during the treatment the belt is revolved under tension passing against and past at least one relatively small diameter transversely disposed work roller deflecting the course of the tensioned belt for causing inelastic yielding bending elongation of the belt for flattening the belt prior to operation in a moving mold, the improvement in said treatment characterized by: during said treatment producing greater inelastic yielding elongation in said two marginal areas of the revolving tensioned belt than in said main middle area by work-roller bending stretching of the two marginal areas more than the main middle area for enhancing flatness of the main middle area of the belt when the belt is being revolved under tension travelling through a moving mold and the main middle area is being heated in the moving mold, said treatment producing a residual longitudinal tensile stress in said main middle area and a residual longitudinal compressive stress in said two marginal areas of said casting belt when at temperature equilibrium in the absence of externally applied force, and said differential between said residual longitudinal tensile and compressive stresses being at least 6,000 pounds per square inch of belt cross-sectional area.

이 특허에 인용된 특허 (10) 인용/피인용 타임라인 분석

Hazelett Robert William (Winooski VT) Wood John Frederick Barry (Burlington VT), Continuous casting apparatus wherein the temperature of the flexible casting belts in twin-belt machines is controllably.
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Hazelett ; Robert William ; Wood ; John Frederick Barry, Coolant nozzle apparatus in twin-belt continuous casting machines.
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Bergeron Norman J. (Burlington VT) Boozan Dean A. (Waterville VT) Brennan Thomas E. (South Hero VT), Laterally floating thermal spray gun traversing apparatus and system for laterally tracking a revolving casting belt bei.
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Bergeron Norman J. (Burlington VT) Boozan Dean A. (Waterville VT) Hazelett R. William (Colchester VT), Machine for producing insulative and protective coatings on endless flexible metallic belts of continuous casting machin.
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Bergeron Norman J. (Burlington VT) Szczypiorski Wojtek S. (Colchester VT) Villa James G. (Hinesburg VT) Hazelett S. Richard (Provo UT), Matrix coatings on endless flexible metallic belts for continuous casting machines method of forming such coatings and t.
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Hazelett, Robert W.; Wood, John F. B., Method of and apparatus for steam preheating endless flexible casting belt.
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Hazelett Robert William (Winooski VT) Wood John Frederick Barry (Burlington VT) Carmichael Robert J. (Colchester VT), Symmetrical belt tensioning system and apparatus for twin-belt continuous casting machines.
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Hazelett Robert William (Winooski VT) Wood John Frederick Barry (Burlington VT) Carmichael Robert J. (Colchester VT), Symmetrical synchronized belt-steering system and apparatus for twin-belt continuous metal casting machines.
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Hazelett Robert William (Winooski VT) Wood John Frederick Barry (Burlington VT), Twin-belt continuous casting method providing control of the temperature operating conditions at the casting belts.
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Hazelett Robert William (Winooski VT) Wood John Frederick Barry (Burlington VT), Twin-belt continuous casting wherein the belts are sensed by mechanical probes.
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이 특허를 인용한 특허 (8) 인용/피인용 타임라인 분석

Pereira, John, Apparatus for casting solder on a moving strip.
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Joensuu Teuvo,FIX, Arrangement in connection with a spreader roll drive.
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Denis L. Munsche, Flexible end supporting arrangement for direct drive adjustable spreader rolls.
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Eastman, Mark, Method of forming textured casting rolls with diamond engraving.
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Shimoda,Koji, Rolling apparatus and rolling method.
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Munche, Denis L.; Boutin, David P., Spreader roll.
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Dykes Charles D. ; Wood J. F. Barry ; Simon Charles R. ; Hazelett R. William, Steering, tensing and driving a revolving casting belt using an exit-pulley drum for achieving all three functions.
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Madhavan, Vis; Saket, Mahdi, Stretch roll forming.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Method and apparatus for introducing differential stresses in endless flexible metallic casting belts for enhancing belt 원문보기

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[미국특허] Method and apparatus for introducing differential stresses in endless flexible metallic casting belts for enhancing belt 원문보기

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