EP1044740A2 - Verfahren zur herstellung von gegenständen aus durchlöcherten plattenmaterialen - Google Patents

Verfahren zur herstellung von gegenständen aus durchlöcherten plattenmaterialen Download PDF

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Publication number
EP1044740A2
EP1044740A2 EP00102519A EP00102519A EP1044740A2 EP 1044740 A2 EP1044740 A2 EP 1044740A2 EP 00102519 A EP00102519 A EP 00102519A EP 00102519 A EP00102519 A EP 00102519A EP 1044740 A2 EP1044740 A2 EP 1044740A2
Authority
EP
European Patent Office
Prior art keywords
web
former
expanded metal
margins
sheet
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.)
Withdrawn
Application number
EP00102519A
Other languages
English (en)
French (fr)
Other versions
EP1044740A3 (de
Inventor
Ian D Kernot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meltog Ltd
Original Assignee
Meltog Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Meltog Ltd filed Critical Meltog Ltd
Publication of EP1044740A2 publication Critical patent/EP1044740A2/de
Publication of EP1044740A3 publication Critical patent/EP1044740A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/156—Making tubes with wall irregularities
    • B21C37/157—Perforations

Definitions

  • This invention relates to a method for the manufacture of articles in foraminous sheet materials, which term is used to cover those sheet materials whose surface area is comprised to a large extent of holes or perforations defined by strips or strands of material which also provide the integrity of the sheet.
  • a particular example of such sheet material is known as expanded metal.
  • expanded metal can be produced by passing a continuous web of sheet steel or other metal between a pair of interengaging cylinders, one of which is comprised of a plurality of toothed discs which correspond with a number of plane discs from which the other is comprised, which may be driven, and which punch a number of rows of parallel slits in the web.
  • the rows are parallel to the direction of travel of the web between the cylinders, and each of the slits is offset with regard to those in adjacent rows such that a staggered arrangement of slits results.
  • cylindrical filters from expanded metal has conventionally been effected either by rolling opposite parallel edges of a single sheet section towards one another, or helically winding a web of expanded metal about a mandrel.
  • respective edges of the sheets or webs are provided with interlocking formations, for example by bending the edges of expanded metal in opposite directions to form flanges on the sheets or webs which interengage after the respective edges are rolled or wound towards one another.
  • a seaming operation creates the join between the edges and, in the case of sheet sections, completes the article.
  • a web of expanded metal is helically wound around a mandrel orientated at a predetermined angle to the direction of travel of the web, and a helical seam is formed around the cylinder formed around said mandrel.
  • the expanded metal cylinder translates along the mandrel and off one end thereof until the uppermost edges thereof contact a switch which temporarily ceases translation of the web and winding thereof during which period a circular cutter rotates about the axis of the cylinder and cuts that portion of the expanded metal cylinder already translated off the mandrel from that in contact with the said mandrel.
  • the helical seam of the cylinder is formed from the corrugated and/or jagged edges of the expanded metal web which are folded back over one another to form said seam, and the fact that the plane of cutting as described is perpendicular to the axis of the cylinder and therefore intercepts the helical seam at an angle can give rise to detrital metal swarf from the cutting action.
  • a method of forming cylindrical expanded metal sections comprising the steps of constraining a web of sheet material to move in a direction parallel to its free edges, punching a plurality of rows of slits in said sheet material but leaving unpunched margins at said free edges, providing said margins with complementary formations capable of interlocking, expanding the sheet material in a direction generally transverse to the direction of the slits, winding said expanded sheet material over a former disposed at a predetermined angle to the overall direction of travel of the web such that web portions already wound thereon translate along said former, and interlocking said corresponding formations on adjacent edges on said former and compressing to form a helical seam.
  • the rows of slits are substantially parallel to the free edges of the web.
  • only one of said margins may be provided with a formation which is capable of receiving the opposite edge during the formation of the helical seam.
  • the cylindrical expanded metal section translates along the formed until free edges of said section contact switch means which temporarily halt the motion of the web of sheet material and thus the said translation of the formed cylindrical section over the former, during which time cutting means cuts the formed cylindrical section in a plane perpendicular to the axis of the former and thus the formed cylindrical section.
  • the cutting means is a rotary cutter provided internally of the formed cylindrical section.
  • Figures 1 and 2 merely show different portions of a continuous process, and the apparatus shown in these figures are intended to be juxtaposed.
  • FIG. 1 there is shown a web of sheet material 2 which is suitably driven in the direction shown by arrow 4.
  • the web 2 passes between a pair of rollers 6, 8 which may optionally impart the drive to the said web and which are provided with corresponding formations 10, 12 which interengage as the said rollers are rotated.
  • the formations 10 are in the form of a plurality of teeth provided on a number of adjacent discs 14, 16, 18, 20, 22 mounted on and securely attached to the roller 6.
  • the roller 8 is provided with a plurality of grooves 24, 26 defined by untoothed discs separated by spacers both of which are mounted on and secured to said roller 8. The thickness of the untoothed discs and the spacers is chose to correspond with the thickness of the teeth 10 and the separation between said teeth on the roller 6.
  • the punched web is subsequently urged towards two further pairs of rollers 34, 36, 38, 40, the first pair 34, 36 orientated with their axes substantially perpendicular to the direction of travel of the web 2 and the second pair 38, 40 orientated with their axes disposed at a predetermined angle to the direction of travel of the web.
  • Said latter pair of rollers urge the particular edge of the web passing therebetween away from the opposite edge and thus effect a transverse expansion of the web.
  • a number of different roller configurations may be adopted to perform this particular expansion step, but their ultimate aim is to expand the web in a generally transverse direction and ensure that the web remains substantially planar after the expansion step. Expansion may be effected out of the plane of the web passing through the rollers 6, 8, or in the same plane as shown in the figure, but in either case a set of correcting rollers 42, 44 is required to constrain at least one edge to resume a substantially parallel direction of travel to that of the alternate edge.
  • the strips 48 which define the holes 46 and from which the resulting web is structurally constituted are often angled and inclined out of the plane of the web.
  • it is passed through compression rollers 50, 52 which remove any sharp edges.
  • Said compression rollers 50, 52 are also provided with complementary formations 54, 55 (seen through the holes 46 of the web 2), which provide the marginal portion 30 with a downwardly depending curved flange portion 60, and 56, 58 which provide the marginal portion 32 with an upwardly extending curved flange portion 62.
  • complementary formations 54, 55 strip through the holes 46 of the web 2
  • 56, 58 which provide the marginal portion 32 with an upwardly extending curved flange portion 62.
  • said flange portions 60, 62 may be effected by an alternate set of rollers either downstream or upstream of the said compression rollers 50, 52, and further that the formation of said flange portions may even be effected before the punching operation of rollers 6, 8.
  • FIG. 2 there is shown the web 2 (without holes 46 for clarity) which emerges from the compression rollers 50, 52 shown in Figure 1.
  • the said web is suitably driven towards a rotatable mandrel 64 whose axis intersects the line of direction of travel of the web at a predetermined angle which is dependent on the width of web 2, and the diameter of the cylindrical article which is to be produced by the process according to the invention.
  • a selectively removable seaming roller 66 provided with a formation 68 which both ensures that the downwardly depending and upwardly extending curved flange portions 60, 62 interlock as the planar web comes into contact with the mandrel 64, and also that the interlock thus formed is compressed to form a seam between the edge 70 coming into contact with the mandrel and the edge 72 of the web already helically wound onto the mandrel 64.
  • the resulting louvre-type formation is shown in Figure 3.
  • a cylindrical article of expanded metal is formed substantially continuously on said mandrel 64.
  • the cylinders so formed are cut into discreet lengths by a selectively operable cutter 74 provided at one end of the mandrel. It will be appreciated that the cutter 74 may be provided entirely separately of the mandrel but its purpose in any event is to ensure that the plane of incision of the cylindrical sections form on the mandrel is perpendicular to its axis.
  • the cutter is shown in Figure 2 as being mounted on the end of mandrel 64, in practice this cutter is more likely to be mounted above or to one side of the mandrel and outside the helically wound expanded metal cylinder on said mandrel.
  • the cutter moves inwardly over the tool steel end of the mandrel incising the cylinder as it does so to slice off a predetermined cylindrical length.
  • the operation of the cutter is automatically effected when a predetermined length of cylindrical section has been translated off the mandrel 64 in the direction shown by arrow 76. At this stage, the motion of all the components, with the exception of the cutter, is temporarily halted while the cutter 74 makes its rotary incision of the cylindrical section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
EP00102519A 1999-03-18 2000-02-07 Verfahren zur herstellung von gegenständen aus durchlöcherten plattenmaterialen Withdrawn EP1044740A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9906375.2A GB9906375D0 (en) 1999-03-18 1999-03-18 Method for manufacture of articles in foraminous sheet materials
GB9906375 1999-03-18

Publications (2)

Publication Number Publication Date
EP1044740A2 true EP1044740A2 (de) 2000-10-18
EP1044740A3 EP1044740A3 (de) 2002-03-20

Family

ID=10849976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00102519A Withdrawn EP1044740A3 (de) 1999-03-18 2000-02-07 Verfahren zur herstellung von gegenständen aus durchlöcherten plattenmaterialen

Country Status (2)

Country Link
EP (1) EP1044740A3 (de)
GB (1) GB9906375D0 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1945386A2 (de) * 2005-09-20 2008-07-23 Helix Internation, Inc. Maschine zur herstellung von schraubenförmig gefalzten rohren aus festem bandmaterial aus streckmetall
WO2011126781A2 (en) * 2010-04-06 2011-10-13 Kuchar David M Expandable web material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071638B (de) * 1959-12-24 Hein, Lehmann fx Co. Aktiengesellschaft, Düsseldorf Verfahren zum Herstellen von Filterrohren
DE2651714A1 (de) * 1976-11-12 1978-05-24 Reinhold Mendritzki U Co Kaltw Verfahren und vorrichtung zum verarbeiten von bandmaterial zu profilen
US4664684A (en) * 1986-01-30 1987-05-12 Cummins Engine Company, Inc. Air filter unit
EP0353622A1 (de) * 1988-08-02 1990-02-07 Meltog Limited Vorrichtung zur Herstellung perforierter Rohre

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071638B (de) * 1959-12-24 Hein, Lehmann fx Co. Aktiengesellschaft, Düsseldorf Verfahren zum Herstellen von Filterrohren
DE2651714A1 (de) * 1976-11-12 1978-05-24 Reinhold Mendritzki U Co Kaltw Verfahren und vorrichtung zum verarbeiten von bandmaterial zu profilen
US4664684A (en) * 1986-01-30 1987-05-12 Cummins Engine Company, Inc. Air filter unit
EP0353622A1 (de) * 1988-08-02 1990-02-07 Meltog Limited Vorrichtung zur Herstellung perforierter Rohre

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1945386A2 (de) * 2005-09-20 2008-07-23 Helix Internation, Inc. Maschine zur herstellung von schraubenförmig gefalzten rohren aus festem bandmaterial aus streckmetall
EP1945386A4 (de) * 2005-09-20 2013-11-13 Helix Internation Inc Maschine zur herstellung von schraubenförmig gefalzten rohren aus festem bandmaterial aus streckmetall
WO2011126781A2 (en) * 2010-04-06 2011-10-13 Kuchar David M Expandable web material
WO2011126781A3 (en) * 2010-04-06 2012-02-23 Kuchar David M Expandable web material

Also Published As

Publication number Publication date
EP1044740A3 (de) 2002-03-20
GB9906375D0 (en) 1999-05-12

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