GB828645A - Improvements in friction-driven screw presses - Google Patents
Improvements in friction-driven screw pressesInfo
- Publication number
- GB828645A GB828645A GB20138/57A GB2013857A GB828645A GB 828645 A GB828645 A GB 828645A GB 20138/57 A GB20138/57 A GB 20138/57A GB 2013857 A GB2013857 A GB 2013857A GB 828645 A GB828645 A GB 828645A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flywheel
- head
- cross
- piston
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/18—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by screw means
- B30B1/185—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by screw means driven through friction roller means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
Abstract
828,645. Screw presses. ETABLISSEMENTS GRIMAR. June 26, 1957 [Nov. 9, 1956], No. 20138/57. Class 87(2). The flywheel 1 of a friction-driven screw press, in which the flywheel moves axially with the screw spindle 4 and the cross-head 18, is driven alternately in either direction by two vertical drums 22, 23 which are fixed in the axial direction, and have an axial length in that direction at least equal to the travel of the flywheel. The spindles 26, 27 of the drums are carried by double-armed levers pivoted at 30, 31 and connected at their other ends through rods 34, 35 to a doubleacting piston 36 which is constrained in a neutral position in its cylinder 37 by opposed springs 40, 41. The drums are freely rotatable on their spindles and are belt-driven from motors 49, 51. The screw spindle 4 is guided in its travel by an upward extension 12 which passes through a bore 13 and the spindle has keyed. to it, above the cross-head 18, a brake pulley 16. The cross-head carries a spindle 55, Fig. 5, on which are pivoted two jaws 53, 54 enclosing the brake pulley 16 and normally closed thereon by a spring 62 acting on a piston 58 in a cylinder 56. The operation of two switch buttons 88, 89, or a pedal switch 90, Fig. 6, causes electrically controlled valves to admit pressure fluid to the cylinder 56 and, through a port 43, to the left of the piston 36 in the cylinder 37, whereby the brake is released and the rotating drum 22, is pressed against the flywheel 1. The cross-head 18 is therefore driven downwards on its pressing stroke. At the bottom of the stroke a cam 75, attached to the cross-head, actuates a limit switch 73 which causes a reversal of fluid pressure from the left to the right of the piston 36, the drive of the flywheel being thus transferred to the drum 23, causing the cross-head to rise. At the top of the stroke a limit switch 71 is operated, causing the release of fluid pressure from the cylinders 37, 56 and so resulting in the return of the piston 36 to its neutral position and the re-application of the brake jaws 53, 54, the spindle and flywheel thus becoming immobilized. The positions of the limit switches 71, 73 are adjustable on a bar 68. The force of the blow delivered by the press may be controlled by altering the position of a circuit breaker 79 on a bar 76. If the circuit breaker 79 is raised a cam 82 on the crosshead opens it during the dow-nstroke and results in earlier release of the fluid pressure from the cylinder 37 and therefore earlier release of the drum 22 from contact with the flywheel, thus lessening the force of the blow. The cam and circuit breakers carry pointers which indicate their positions on a scale 81.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR828645X | 1956-11-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB828645A true GB828645A (en) | 1960-02-24 |
Family
ID=9283839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20138/57A Expired GB828645A (en) | 1956-11-09 | 1957-06-26 | Improvements in friction-driven screw presses |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB828645A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5741900A (en) * | 1980-08-25 | 1982-03-09 | Ishikawatoki Tekkosho:Kk | Driving device of screw press |
DE8910841U1 (en) * | 1989-09-11 | 1989-11-02 | The Japan Steel Works, Ltd., Tokio/Tokyo | Screw press |
-
1957
- 1957-06-26 GB GB20138/57A patent/GB828645A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5741900A (en) * | 1980-08-25 | 1982-03-09 | Ishikawatoki Tekkosho:Kk | Driving device of screw press |
JPS5922637B2 (en) * | 1980-08-25 | 1984-05-28 | 株式会社 石川時鉄工所 | Screw press drive device |
DE8910841U1 (en) * | 1989-09-11 | 1989-11-02 | The Japan Steel Works, Ltd., Tokio/Tokyo | Screw press |
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