Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2904829 A
Publication typeGrant
Publication dateSep 22, 1959
Filing dateApr 30, 1956
Priority dateMay 16, 1955
Publication numberUS 2904829 A, US 2904829A, US-A-2904829, US2904829 A, US2904829A
InventorsFriedrich Heck
Original AssigneeFriedrich Heck
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Devices for the rolling of strip from metal powder
US 2904829 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Sept. 22, 1959 I F. HECK 2,904,829

DEVICES FOR THE ROLLING OF STRIP FROM METAL POWDER Filed April 30, 1956 I Heck fl-t Patented Sept. 22, 1959 I &Q

DEVICES FUR THE ROLLING 0F STRIP FROM METAL POWDER Friedrich Heck, Hamburg-Bergedorf, Germany Application April 30, 1956, Serial No. 581,446

Claims priority, application Germany May 16, 1955 2 Claims. (Cl. 18-9) This invention relates to the design of a rolling mill for the manufacture of strip from metal powder. In devices of this nature the problem arises of achieving a uniform compression of the metal powder over the entire width of the cross-section. It is in this case particularly difficult to roll a strip whose edges are uniformly dense and of a rectangular shape. In the devices which have been proposed or disclosed in the past, there is frequently a reduction of the quantity of material along the edges, which produces notches at right angles to the direction of rolling, when the rolling of the sintered strip is continued. In such cases it is necessary to trim the edges of the manufactured strip, so that considerable losses occur.

According to the present invention, discs projecting beyond the edge of the roll are provided for the lateral limitation of the width of the material, where the discs are movable in the direction of the axis of the rolls, and can be pushed by means of pressure rollers or sliding shoes against the roll edge, in the neighbourhood of the gap between the rolls. The discs can be supported here on pins arranged laterally on the side of the roll body. It is in this case convenient to provide for slight play between these pins and the openings in the disc, so that the disc can follow easily the lateral pressure exerted against it. A support of this nature can also be achieved by making the discs engage with projections in grooves accommodated in the axial direction on the roll shafts.

In a preferred embodiment of the invention, the discs are made elastic. Also, at the back of the gap between the rolls pressure rollers are provided, which slightly lift the edge of the discs from the roll body. This ensures that the strip can be lifted without friction off the roll.

The strip edges, which are sensitive while the strip is in the raw state, are therefore protected.

The invention enables also the roll body faces to be reground without dilficulty, which is not the case if fixed edge discs are employed, when grinding has an unfavourable elfect on the play in the length of the roll body.

The drawing shows an example of an embodiment of the invention:

Figure l is a diagrammatic side view of the device;

Figure 2 is the front view; and

Figure 3 is the plan view.

A powder hopper is accommodated above the gap between the rolls, where the powder hopper can be given any desired shape and does not form an object of the invention. The two rolls 2 and 3 are arranged underneath the said powder hopper. The width of the gap between the rolls can be seen in Figure 3. On both sides of the roll 2, Figure 2, discs 4 are accommodated whose task is to limit the roll gap laterally, as shown in Figure 3. These discs 4 are supported on three pins 9 in such a way that they can move in the direction of the roll axis. Also, pressure rollers 6 in rolling contact with the discs 4 are arranged so that they exert a pressure against these discs 4 in the direction of the roll body. The rolls 2 and 3 are supported in the usual way by roll shafts 5. Pressure rollers 8 are provided at the back of the roll gap, which slightly lift the edge of the elastic disc 4 off the roll body, so that the strip 7 can be lifted oif the roll without friction.

What is claimed is:

1. A rolling mill for producing metal strip from metal powder, comprising: at least two rolls, means for rotating the rolls, means for feeding metal powder to a gap between the rolls, two axially movable discs carried by one of the rolls, one disc being at each end of the roll, the radius of each disc exceeding the radius of the roll that carries it by an amount at least equal to the width of the roll gap, pressure rollers for pressing the discs against the ends of the disc-carrying roll in the neighbourhood of the roll gap, and pins extending from the ends of the disc-carrying roll parallel to the roll axis, the discs being freely slidable on these pins.

2. A rolling mill for producing metal strip from metal powder, comprising: at least two rolls, means for rotating the rolls, means for feeding metal powder to a gap between the rolls, two axially movable discs of elastic material carried by one of the rolls, one disc being at each end of the roll, the radius of each disc exceeding the radius of the roll that carries it by an amount at least equal to the width of the roll gap, means for pressing the discs against the ends of the disc-carrying roll in the neighbourhood of the roll gap, and rollers adapted to lift the edges of the discs away from the adjacent ends of the roll at a position beyond the roll gap.

References Cited in the file of this patent UNITED STATES PATENTS 870,249 Patterson Nov. 5, 1907 1,185,399 Hayes Nov. 30, 1916 1,289,275 Sargent Dec. 31, 1918 1,361,970 Dickey Dec. 14, 1920 2,341,732 Marvin Feb. 15, 1944 2,349,829 Nydegger et al. May 30, 1944 2,397,608 Johnson Apr. 2, 1946 2,811,750 Cofek Nov. 5, 1957 2,817,875 Harris et al. Dec. 31, 1957

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US870249 *Jan 20, 1904Nov 5, 1907Thomas C PattersonCruller-cutting machine.
US1185399 *Mar 27, 1914May 30, 1916Samuel HayesMachine for molding from cement and other plastic materials.
US1289275 *Jun 1, 1915Dec 31, 1918Roessler & Hasslacher ChemicalApparatus for molding.
US1361970 *Feb 15, 1919Dec 14, 1920Westinghouse Electric & Mfg CoComposite-plate-curing machine
US2341732 *Apr 4, 1941Feb 15, 1944Gen Motors CorpMethod and apparatus for briquetting of powdered metal
US2349829 *Aug 15, 1942May 30, 1944Du PontApparatus
US2397608 *Feb 19, 1942Apr 2, 1946Johnson Corydon MFormer for sheet metal parts
US2811750 *Nov 5, 1954Nov 5, 1957Raybestos Manhattan IncProduction of friction material
US2817875 *Jan 18, 1954Dec 31, 1957Gen Motors CorpMold for molding rubber foam latex strips and the like
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3017666 *Mar 25, 1959Jan 23, 1962StamicarbonApparatus for producing a smooth-surfaced body consisting of a granular material
US3124838 *Sep 14, 1961Mar 17, 1964 Metal coated particles
US3162708 *Jun 21, 1961Dec 22, 1964Sherritt Gordon Mines LtdMethod for compacting metal powder
US3203045 *Mar 15, 1963Aug 31, 1965Mannesmann AgRolling mills for metal powder rolling
US3250104 *Nov 13, 1962May 10, 1966Battelle Development CorpHigh-temperature rolling mill
US3298060 *Jun 7, 1963Jan 17, 1967Michalak Martin HMethods and apparatus for compacting powdered metal to form strips
US3309735 *Apr 27, 1964Mar 21, 1967Schloemann AgMethods and means for rolling metal powder
US3433047 *Jan 26, 1967Mar 18, 1969Reynolds Metals CoMetal rolling system
US3517537 *Sep 15, 1967Jun 30, 1970Southwire CoMethod of hot-forming continuously cast aluminum
US3565159 *Jul 31, 1968Feb 23, 1971Ural Z Tyazhelogo Mash Im S OrDevice for continuous production of sheet metal
US3589308 *Jun 16, 1969Jun 29, 1971Lehara Inc WernerPatty making machine
US3648624 *Aug 7, 1970Mar 14, 1972Lehara Inc WernerPatty making machine
US3689209 *Jul 27, 1970Sep 5, 1972Otrok Anatoly IlichApparatus for manufacturing rolled products from powdery materials
US3746071 *Aug 28, 1970Jul 17, 1973Iit Res InstMethod for treating materials
US3892832 *Jun 14, 1973Jul 1, 1975Schey John AMethod of compressing and rolling powder
US4144009 *Jul 18, 1977Mar 13, 1979British Steel CorporationApparatus for production of metal strip
US4167377 *Jul 21, 1978Sep 11, 1979The International Nickel Company, Inc.Powder rolling apparatus
US4231729 *Oct 9, 1979Nov 4, 1980Huntington Alloys Inc.Powder rolling apparatus
US4820466 *Jan 22, 1987Apr 11, 1989Zachariades Anagnostis EProcess for obtaining ultra-high modulus products
Classifications
U.S. Classification425/79, 425/363, 419/43, 72/224
International ClassificationB22F3/18, B22F3/00
Cooperative ClassificationB22F3/18
European ClassificationB22F3/18