| Title of Invention | STEEL FIBER MAKING MACHINE |
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| Abstract | The invention provides a machine for making steel fibers of desired shape and length comprising a pair of circular dies (1,1') having grooves (16) to give the finer the desired shape. A plurality of cartridge tip cutters (11) are embedded on one of the dies (1'), the cutters being provided at regular intervals for cutting the fibers in the desired length. A positive wire feed mechanism (9,10) is provided with gear drives (2,3) for feeding the wire to the circular dies (1,1'). |
| Full Text | A deformed or shaped steel wire of length 10 to 100 mm is named a "steel fiber". This invention relates to making steel fibers from steel wires. A number of steel wires are fed into the machine through positive feed "rollers and guides". The wires are first pressed to a desired shape and cut to a desired length in the machine simultaneously. Thus, the steel fibers from the steel wires are made in this machine. At present, steel fibers are made in the same manner as "Staple Pins" are made, where the steel wires are first cut into small pieces of desired length and then pressed in a die. The processes in this machine are cyclic and slow. The concept applied in this case is of conventional "die and punch" system where the chances of damage and breakage of dies are higher due to impact loads. The objective of this invention is to provide an improved machine in which wire cutters are embedded in the die. The process of shaping and cutting of the wires into fibers is continuous and fast in relation to the existing machine for making steel fibers. Thus, the present invention provides a machine for making steel fibers of desired shape and length comprising a pair of circular dies having grooves to give the fiber the desired shape, a plurality of cartridge tip cutters embedded on one of the dies, said cutters being provided at regular intervals for cutting the fibers in the desired length and a positive wire feed mechanism with gear drive. This invention is illustrated in the drawings left with the provisional specification. The machine is described with respect to the accompanying Figures 1 to 5. Figure 1 shows a pair of mated circular dies 1,1'- The circular dies consist of a number of specified grooves 16 machined on the periphery of a pair of circular discs. Grooves 16 provide desired shape to the fiber like end hooked or wavy shape. A number of cartridge tip wire cutters 11 are embedded at regular intervals in the lower circular die. The cutters are provided to cut the fiber in desired lengths of say 10-100 mm. Figure 2 shows an enlarged view of the mated parts of the circular dies between two typical cutters. Figure 3 shows the position of a typical cutter embedded in the circular die. - 3 - A number of wires of 0.5 to 0.6 mm diameter or flat are fed to the circular dies by "wire feed rollers" 9 and 10 through a wire guide 15. The wire rolls are kept on wire holding discs 12 (Figure 1) and are straightened by rollers 14 before they are fed to the circular dies. The lower circular die 1* containing the cutters is mouned on an idle shaft. The upper circular die is mounted on a shaft containing a gear 3 (Figures 4 and 5) which is driven by a gear 2. The wire feed roller 9 is mounted on a shaft containing a gear 8 which is driven by a gear 7. The gears 2 and 7 are mounted on a single shaft. The lower circular die 1* on the idle shaft is synchronously driven by a positive feed from the upper circular die 1. The positive feed is not insured in all shapes of the groove. In this case, a pair of synchronous gears of equal diameter and equal number of teeth have to be mounted on the feed as well as on the idle shaft to drive the lower circular die. Fabrication of Steel Fibers The shaft, on which gears 2 and 7 are mounted, is rotated in an anti-clockwise direction by a handle. The gears 2 and 7 drive the gears 3 and 8 respectively in a clockwise direction. Thus, the - 4 - upper circular die and wire feed rollers are driven in clockwise direction also. The wires fed by the wire feed roller 9 to the circular dies 1,1' are pressed in the dies as they pass through them. Subsequently, the pressed wires are cut by a wire cutter 11 when they are pressed between the upper circular die and the cutter. The wires after passing through the circular dies are pressed to a shape and cut to a length depending upon type of the dies and distance between the cutters respectively. In this way, the shaped steel wires of length 10 to 100 mm named "steel fibers" are fabricated by this machine. - 5 - WE CLAIM: 1. A machine for making steel fibers of desired shape and length, comprising : - a pair of circular dies (1,1') having grooves (16) to give the fiber the desired shape; - a plurality of cartridge tip cutters (11) embedded on one of the dies (1'), said cutters being provided at regular intervals for cutting the fibers in the desired length; and - a positive wire feed mechanism (9,10) with gear drives (2,3). 2. The machine as claimed in claim 1, wherein the shape of the fiber can be wavy or end hooked type. 3. The machine as claimed in claims 1 or 2, wherein the length of the fiber can be 10 to 100 mm. 4. The machine as claimed in claim 1, wherein said circular dies (1,1') are rotated by a positive gear drive (2,3) in circular motion. 5. A process for making steel fibers using a machine as claimed in claims 1 to 4, comprising the steps of : - feeding the steel wires or fibers to the circular dies (1,1*) by wire feed rollers (9,10) through a wire guide (15); - 6 - - pressing the fibers in said dies as they pass through them giving the fibers a desired shape using the die grooves (16); and - cutting the fibers in desired lengths using cartride tip cutters (11) embedded on one of the dies (1') at regular intervals. 6. A machine for making steel fibers substantially as herein described and illustraed in the accompanying drawings. B B SEN OF L S DAVAR & CO APPLICANTS' AGENT Dated this 9th day of October, 1996 - 7 - The invention provides a machine for making steel fibers of desired shape and length comprising a pair of circular dies (1,1') having grooves (16) to give the finer the desired shape. A plurality of cartridge tip cutters (11) are embedded on one of the dies (1'), the cutters being provided at regular intervals for cutting the fibers in the desired length. A positive wire feed mechanism (9,10) is provided with gear drives (2,3) for feeding the wire to the circular dies (1,1'). |
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01778-cal-1996-correspondence.pdf
01778-cal-1996-description(complete).pdf
1778-cal-1996-granted-abstract.pdf
1778-cal-1996-granted-acceptance publication.pdf
1778-cal-1996-granted-claims.pdf
1778-cal-1996-granted-correspondence.pdf
1778-cal-1996-granted-description (complete).pdf
1778-cal-1996-granted-drawings.pdf
1778-cal-1996-granted-examination report.pdf
1778-cal-1996-granted-form 1.pdf
1778-cal-1996-granted-form 2.pdf
1778-cal-1996-granted-form 26.pdf
1778-cal-1996-granted-form 3.pdf
1778-cal-1996-granted-letter patent.pdf
1778-cal-1996-granted-reply to examination report.pdf
1778-cal-1996-granted-specification.pdf
| Patent Number | 193510 | |||||||||
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| Indian Patent Application Number | 1778/CAL/1996 | |||||||||
| PG Journal Number | 30/2009 | |||||||||
| Publication Date | 24-Jul-2009 | |||||||||
| Grant Date | 09-Oct-1996 | |||||||||
| Date of Filing | 09-Oct-1996 | |||||||||
| Name of Patentee | DR. UPENDRA KUMAR SINGH | |||||||||
| Applicant Address | MACHINERY OF INDIAN SCHOOL OF MINES, DHANBAD | |||||||||
Inventors:
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| PCT International Classification Number | B21C 1/04 | |||||||||
| PCT International Application Number | N/A | |||||||||
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PCT Conventions:
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