Method and blank for producing a screw-tube conveyor and screw-tube conveyor produced in this way
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0440473
(2007-08-02)
|
등록번호 |
US-8133048
(2012-03-13)
|
우선권정보 |
DE-10 2006 042 856 (2006-09-13) |
국제출원번호 |
PCT/EP2007/006842
(2007-08-02)
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§371/§102 date |
20090309
(20090309)
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국제공개번호 |
WO2008/031478
(2008-03-20)
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발명자
/ 주소 |
- Stricker, Urban
- Woelfle, Frank
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출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
6 |
초록
▼
The invention relates to a method and a blank for producing a screw-tube conveyor in the form of a cylindrical rotary tube (110) with an internal screw spiral (120) for conveying and mixing a bulk material. To simplify the method and to create even long screw-tube conveyors with small diameters in a
The invention relates to a method and a blank for producing a screw-tube conveyor in the form of a cylindrical rotary tube (110) with an internal screw spiral (120) for conveying and mixing a bulk material. To simplify the method and to create even long screw-tube conveyors with small diameters in an relation to their length, it is proposed according to the invention first to produce a one-piece blank, which comprises a base portion in the basic form of a parallelogram and having laterally mounted fins. In a second method step, the fins are then bent, preferably by 90°, with respect to the base portion. In a third method step, the base portion (112) is then bent along bending lines (115i) in such a way that the base portion forms a helical casing portion (111) of the rotary tube (110) and the previously bent-round fins (122) form segments of the screw spiral (120) arranged inside the rotary tube (110). The invention also relates to a screw-tube conveyor produced in this way.
대표청구항
▼
1. A method of making a screw-tube conveyor in the form of a cylindrical rotatable tube having an internal helix for conveying and mixing bulk material, the method comprising the following steps: providing a unitary blank comprising an elongated base strip having a longitudinal row of lateral fins,
1. A method of making a screw-tube conveyor in the form of a cylindrical rotatable tube having an internal helix for conveying and mixing bulk material, the method comprising the following steps: providing a unitary blank comprising an elongated base strip having a longitudinal row of lateral fins, the base strip having two first opposite longitudinal edges and two second transverse end edges bridging ends of the longitudinal edges, the strip having longitudinally spaced and transversely extending bend lines extending between the first longitudinal edges and extending parallel to the second transverse edges, the fins each being formed unitarily with one of the longitudinal edges between two adjacent bend lines or between one of the transverse end edges and an adjacent one of the bend lines;bending each of the fins about a fin bend angle relative to the base strip along the one longitudinal edge at which the fins are unitarily connected to the base strip; andbending the base strip along the bend lines about a base bend angle such that the base strip forms between the bend lines a helical row of base zones of the rotatable tube and the previously bent fin forms a segment of a helix inside the rotatable tube or a ridge projecting radially outward from the helical row of base zones. 2. The method according to claim 1, further comprising the steps of: interleaving the helical row of base zones and a helical strip such that the ridge lies against the helical strip and that an inner edge of the helical strip that is not covered by the ridge forms a helix inside the screw-tube conveyor; andjoining the helical strip and the ridge in the overlapping regions into the screw-tube conveyor. 3. The method according to claim 2, further comprising the step of: mounting the screw-tube conveyor in a cylindrical housing. 4. The method according to claim 1, wherein the fin bend angle is 90°. 5. The method according to claim 1, wherein the blank is stamped, or cut. 6. A screw-tube conveyor in the form of a cylindrical rotatable tube having an interior helix, produced according to the method according to claim 1. 7. The screw-tube conveyor according to claim 6, wherein the screw-tube conveyor has multiple turns. 8. The screw-tube conveyor according to claim 7, wherein the individual turns of the screw-tube conveyor are at least partially connected to each other in that the fins positioned next to each other inside the screw-tube conveyor are spot welded together, or parts of the helical strip and ridge that are positioned next to each other on the exterior of the screw-tube conveyor are joined together. 9. The screw-tube conveyor according to claim 7, wherein the individual turns of the screw-tube conveyor are at least partially connected to each other at a base of the screw-tube conveyor by a helical weld seam. 10. The screw-tube conveyor according to claim 6, wherein the screw-tube conveyor has an end provided with a flange welded onto the bent fins in the region of the end of the screw-tube conveyor. 11. The screw-tube conveyor according to claim 10, wherein the flange is a toothed gear at the end of the screw-tube conveyor that can mesh with a pinion driven by a drive nut for rotating the screw-tube conveyor. 12. The screw-tube conveyor according to claim 10, wherein the flange is formed as a support ring for rotatably supporting of the screw-tube conveyor on rollers that are conical. 13. The screw-tube conveyor according to claim 6, further comprising: a cavity between a housing, the ridge and the base strip, the cavity being evacuated. 14. A blank for making a screw-tube conveyor in the form of a cylindrical rotatable tube having an interior helix, the blank comprising: an elongated base strip having two first opposite longitudinal edges and two second transverse end edges bridging ends of the longitudinal edges, the strip being formed with longitudinally spaced and transversely extending bend lines extending transversely between the longitudinal edges and parallel to the transverse end edges; anda respective longitudinal row of fins connected unitarily to the base strip at each of the longitudinal edges between two adjacent bend lines or between one of the transverse end edges and an adjacent one of the bend lines. 15. The blank according to claim 14, wherein the base strip and the fins are coplanar before the blank is bent into the screw-tube conveyor. 16. The blank according to claim 14, wherein the blank is made of sheet metal of a thickness of 0.3-3 mm. 17. The blank according to claim 14, wherein the fins are either directly longitudinally adjacent or spaced. 18. The blank according to claim 14, wherein two adjacent fins are separated from each other by a slot extending to the respective bend line. 19. The blank according to claim 14, wherein the fins are trapezoidal. 20. The blank according to claim 19, wherein outer edges of the trapezoidal fins offset from the base strip a concave or a convex part-circular arc. 21. The blank according to claim 14, wherein the fins least partially abut one another in two adjacent turns of the screw-tube conveyor after a subsequent bending of the fins relative to the base strip, and a subsequent bending of the base strip along the bend lines. 22. The blank according to claim 14, wherein the two opposite longitudinal edges extend at an acute angle toward each other in at least one end region of the base strip forming an end of the screw-tube conveyor after the bending of the base strip along the bend lines.
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