WO2003022476A1 - Process and device for production of strips from a sheet - Google Patents

Process and device for production of strips from a sheet Download PDF

Info

Publication number
WO2003022476A1
WO2003022476A1 PCT/GB2002/004054 GB0204054W WO03022476A1 WO 2003022476 A1 WO2003022476 A1 WO 2003022476A1 GB 0204054 W GB0204054 W GB 0204054W WO 03022476 A1 WO03022476 A1 WO 03022476A1
Authority
WO
WIPO (PCT)
Prior art keywords
strips
sheet
slitter
directly adjacent
loops
Prior art date
Application number
PCT/GB2002/004054
Other languages
French (fr)
Inventor
Rade Ognjanovic
Original Assignee
Alcan International Limited
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 Alcan International Limited filed Critical Alcan International Limited
Publication of WO2003022476A1 publication Critical patent/WO2003022476A1/en

Links

Classifications

    • 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
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/006—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only winding-up or winding-off several parallel metal bands

Definitions

  • the invention concerns a process for production of a multiplicity of strips from a sheet, where the sheet which is unwound from a coil is divided into the strips in a slitter, and after leaving the slitter the strips form freely hanging loops and are then wound into strip rolls.
  • the invention includes a device suitable for carrying out the process.
  • the strips are guided in the form of freely hanging loops through a pit. Its depth is such that the loops which are of the same length at the start of the cutting and winding process have a loop length sufficient for the strips wound at higher speed as a result of greater thickness still to form a loop at the end of processing of the entire sheet and not be under tensile stress between the slitter and the winding device.
  • the invention is based on the task of providing a process of the type described initially and a device suitable for carrying out the process with which the swings of the strips can be greatly reduced.
  • Another objective of the invention is to increase the sheet or strip speed and hence the production output.
  • directly adjacent strips are spaced apart from each other horizontally and vertically in the direction of running of the sheet or the strips.
  • the spacing of directly adjacent strips is such that the edges of directly adjacent strips do not touch.
  • Directly adjacent strips are spaced apart from each other vertically preferably immediately after leaving the slitter.
  • directly adjacent strips are guided at an acute angle to each other and, before formation of the freely hanging loops, are spaced from each other horizontally in the running direction of the strips or sheet.
  • the angle between directly adjacent strips on leaving the slitter is preferably between 1° and 30°, in particular between approximately 5° and 10°.
  • a device suitable for carrying out the process according to the invention with arranged in succession in a line, an unwinding device for a sheet wound into a coil, a slitter for dividing the sheet into a multiplicity of strips, a pit to receive freely hanging loops formed by the strips, and a winding device for winding the strips into strip rolls, is characterised in that after the slitter, to guide the strips into the pit as freely hanging loops, for horizontal and vertical spacing of directly adjacent strips, are arranged deflector means spaced horizontally and vertically from each other in the direction of the sheet or strips.
  • the deflector means are rods or pipes of metal, wood or plastic or consist of a material coated with plastic.
  • the deflector means can be idle rolls or driven rolls in the direction of running of the sheet.
  • a slitter used for preference comprises a multiplicity of block knives in a row.
  • the process according to the invention and the device according to the invention are suitable in particular for production of strips from aluminium alloy as a raw material for cooling fins of heat exchangers of all types and for can ring pull tabs.
  • the process according to the invention and the device according to the invention are not however restricted to specific sheet materials. As well as metal sheets for example plastic sheets can be processed into strips.
  • - Fig. 1 a longitudinal section through a plant for production of strips
  • - Fig. 2 a top view of the plant in Fig. 1 ; - Fig. 3 a cross section through a block knife.
  • a plant 10 shown in Figs. 1 and 2 for production of strips 28 from a sheet 18 has a first mandrel 12 for tensioning a coil 16. Allocated to the first mandrel 12 is a first drive motor 14 for unwinding the sheet 18 from the coil 16.
  • the sheet 18 for example has a width b of 1500 mm and a thickness d of approximately 0.04 to 0.5 mm.
  • the thickness d of the sheet 18 is approximately 0.1 mm.
  • the sheet 18 unwound from the coil 16 passes between two first opposing pinch rolls 20 lying on either side against the sheet 18 and is then guided to a slitter 22.
  • the first pinch rolls 22 serve to keep the sheet 18 tensioned when unwinding from the coil 16 and entering the slitter 22.
  • the sheet 18 is divided into a multiplicity of strips 28.
  • the slitter 22 consists for example of a stack, built up in accordance with the number of strips 28 to be cut, of block knives 46 described in more detail in connection with Fig. 3.
  • the width e of the strips 22 is usually between 5 and 250 mm, preferably between 10 and 100 mm, depending on the application.
  • the number of strips 28 cut simultaneously from a sheet 18 is for example between 5 and 300, preferably between 20 and 100.
  • the strips 28 are guided alternately over a first (lower) deflector means 24 or over a second (upper) deflector means 26.
  • the purpose is to prevent the strips 28 from crossing.
  • the two deflector means 24, 26 in the simplest case consist of a rod or a tube of plastic e.g. PVC and are arranged offset to each other both in vertical spacing v and in horizontal spacing h in the running direction x of the sheet 18 or strips 28.
  • the two deflector means 24, 26 are arranged above a pit 30 with a depth t of for example 20 m.
  • the two strip groups 28a, b are guided as two loop groups 32a, b through the pit 30 where the suspension points of the strips 28 on entering the pit 30 are defined by deflector means 24, 26 and on leaving the pit 30 by a deflector roll 34.
  • On the deflector roll 34 are arranged separator discs 36 as side spacers for the strips 28. The distance introduced by the separator discs 36 between directly adjacent strips 28 continues against the direction of running x of the sheet 18 or strips 28 into the pit 30 so that the edges of the strips 28 can no longer make contact with each other even in the rising part of the loops 32.
  • the horizontal distance h between the deflector means 24, 26 ensures that the strip groups 28a, b are also kept apart in the pit 30.
  • the second mandrel 40 is driven by a second drive motor 44.
  • second pinch rolls 38 similar to the first pinch rolls 20. These pinch rolls 38 generate a friction force acting on the strips 28 which in turn tensions the sheet between the pinch rolls 38 and the strip rolls 42 clamped on the second mandrel 40.
  • a block knife shown in Fig. 3 consists of a pair of first steel discs 48 sitting on a common first shaft 54 and lying against these a second steel disc 50 with a peripheral rubber layer 52.
  • the same arrangement of a first steel disc 48 and lying against this a second steel disc 50 with rubber layer 52 sits on a second shaft 56.
  • the two shafts 54, 56 are arranged parallel to each other where the first steel disc 48 on the first shaft 54 lies opposite the second steel disc 50 with rubber layer 52 on the second shaft 56.
  • the first steel disc 48 on the second shaft 56 and the second steel disc 50 with rubber layer 52 on the first shaft 54 lie opposite each other.
  • first steel discs 48 lie under pressure against the rubber layer 52 of the second steel disc 50 in their peripheral area so that the first steel discs 48 opposite each other with an offset overlap slightly in the cutting area and hence lead to a separation of a sheet running through the block knife 46.
  • a slitter 22 - is created for dividing a sheet 18 into strips 28.
  • a relative displacement of adjacent strips in the vertical direction occurs. This positional displacement of directly adjacent strips 28a, b can be advantageously utilised in the present invention as the lower lying strips 28a are guided over the lower deflection means 24 and the higher lying strips 28b over the higher deflector means 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Abstract

In a process for production of a multiplicity of strips (28) from a sheet (18), where the sheet (18) which is unwound from a coil (16) is divided into the strips (28) in a slitter (22), and after leaving the slitter (22) the strips (28) form freely hanging loops (32) and are then wound into strip rolls (42). Directly adjacent strips (28a, b), before formation of the loops (32a, b), are spaced apart from each other horizontally and vertically in the direction of running (x) of the sheet (18) or the strips (28). In a device suitable for carrying out the process, arranged in succession in a line are an unwinding device (12, 14) for a sheet (18) wound into a coil (16), a slitter (22) for dividing the sheet (18) into a multiplicity of strips (28), a pit (30) for receiving freely hanging loops (32) formed by the strips (28), and a winding device (40, 42) for winding the strips (28) on strip rolls (42) and, after the slitter (22), to guide the strips (28) into the pit (30) as freely hanging loops (32), are arranged deflector means (24, 26) spaced vertically and horizontally from each other in the running direction (x) of the sheet (18) or the strips (28), for horizontal and vertical spacing of directly adjacent strips (28a,b). The deflector means prevent the edges of adjacent strips touching and causing swings which lead to strip entanglement with production interruption. As a result the sheet throughput speed can be increased.

Description

Process and Device for Production of Strips from a Sheet
The invention concerns a process for production of a multiplicity of strips from a sheet, where the sheet which is unwound from a coil is divided into the strips in a slitter, and after leaving the slitter the strips form freely hanging loops and are then wound into strip rolls. The invention includes a device suitable for carrying out the process.
For production of narrow strips of metal it is known for example from US-A-4 219 168 to unwind a broad sheet from a coil, divide this in a multiple slitter into the individual strips and subsequently wind these into strip rolls. As the usually rolled metal strips do not have a uniform thickness over their width, the thickness of the strips produced from the sheet varies. When winding the strips with the same rotation speed for all strip rolls, after some time strips with larger thickness lead to a larger diameter of the strip rolls than strips with smaller thickness. As a result thicker strips are wound more quickly than thin strips. To avoid the strips wound at higher speed being under great tensile stress between the slitter and the winding device, and subsequently possibly tearing, to compensate for the different winding speed after leaving the slitter the strips are guided in the form of freely hanging loops through a pit. Its depth is such that the loops which are of the same length at the start of the cutting and winding process have a loop length sufficient for the strips wound at higher speed as a result of greater thickness still to form a loop at the end of processing of the entire sheet and not be under tensile stress between the slitter and the winding device.
With the processes or devices mentioned above for dividing a sheet into a multiplicity of strips and arranging the loops in a pit, narrow strips in particular have a tendency to swing whereby adjacent strips become entangled and can tear, which leads to an operating interruption. The swings occur because the edges of adjacent strips come into contact or even partly overlap. To solve this problem today the sheet speed is reduced so much that the swings of the strip loops in the pit are not sufficiently great for the strips to become entangled.
The invention is based on the task of providing a process of the type described initially and a device suitable for carrying out the process with which the swings of the strips can be greatly reduced.
Another objective of the invention is to increase the sheet or strip speed and hence the production output.
To solve the task according to the invention with regard to the process, before formation of the loops, directly adjacent strips are spaced apart from each other horizontally and vertically in the direction of running of the sheet or the strips.
The spacing of directly adjacent strips is such that the edges of directly adjacent strips do not touch.
Directly adjacent strips are spaced apart from each other vertically preferably immediately after leaving the slitter.
Preferably, after leaving the slitter, for vertical spacing in the direction of running of the sheet or strips, directly adjacent strips are guided at an acute angle to each other and, before formation of the freely hanging loops, are spaced from each other horizontally in the running direction of the strips or sheet.
The angle between directly adjacent strips on leaving the slitter is preferably between 1° and 30°, in particular between approximately 5° and 10°.
A device suitable for carrying out the process according to the invention, with arranged in succession in a line, an unwinding device for a sheet wound into a coil, a slitter for dividing the sheet into a multiplicity of strips, a pit to receive freely hanging loops formed by the strips, and a winding device for winding the strips into strip rolls, is characterised in that after the slitter, to guide the strips into the pit as freely hanging loops, for horizontal and vertical spacing of directly adjacent strips, are arranged deflector means spaced horizontally and vertically from each other in the direction of the sheet or strips.
In a simple suitable embodiment of the device according to the invention, the deflector means are rods or pipes of metal, wood or plastic or consist of a material coated with plastic.
The deflector means can be idle rolls or driven rolls in the direction of running of the sheet.
A slitter used for preference comprises a multiplicity of block knives in a row.
The process according to the invention and the device according to the invention are suitable in particular for production of strips from aluminium alloy as a raw material for cooling fins of heat exchangers of all types and for can ring pull tabs. The process according to the invention and the device according to the invention are not however restricted to specific sheet materials. As well as metal sheets for example plastic sheets can be processed into strips.
Further advantages, features and details of the invention arise from the description below of preferred embodiments and the drawings which show diagrammatically:
- Fig. 1 a longitudinal section through a plant for production of strips;
- Fig. 2 a top view of the plant in Fig. 1 ; - Fig. 3 a cross section through a block knife.
A plant 10 shown in Figs. 1 and 2 for production of strips 28 from a sheet 18 has a first mandrel 12 for tensioning a coil 16. Allocated to the first mandrel 12 is a first drive motor 14 for unwinding the sheet 18 from the coil 16.
The sheet 18 for example has a width b of 1500 mm and a thickness d of approximately 0.04 to 0.5 mm. As a raw material for production of cooling fins for heat exchangers of all types, in particular for installation in automobiles, the thickness d of the sheet 18 is approximately 0.1 mm. As a sheet material for example an aluminium alloy from the series AA3xxx can be used.
The sheet 18 unwound from the coil 16 passes between two first opposing pinch rolls 20 lying on either side against the sheet 18 and is then guided to a slitter 22. The first pinch rolls 22 serve to keep the sheet 18 tensioned when unwinding from the coil 16 and entering the slitter 22.
In the slitter 22 the sheet 18 is divided into a multiplicity of strips 28. The slitter 22 consists for example of a stack, built up in accordance with the number of strips 28 to be cut, of block knives 46 described in more detail in connection with Fig. 3.
The width e of the strips 22 is usually between 5 and 250 mm, preferably between 10 and 100 mm, depending on the application. The number of strips 28 cut simultaneously from a sheet 18 is for example between 5 and 300, preferably between 20 and 100.
After leaving the slitter 22, the strips 28 are guided alternately over a first (lower) deflector means 24 or over a second (upper) deflector means 26. The purpose is to prevent the strips 28 from crossing. The two deflector means 24, 26 in the simplest case consist of a rod or a tube of plastic e.g. PVC and are arranged offset to each other both in vertical spacing v and in horizontal spacing h in the running direction x of the sheet 18 or strips 28. With sequential numbering of the strips 28 across the width b of the sheet 18 with successive whole numbers, for example all odd-numbered (lower) strips 28a are guided over the first (lower) deflector means 24 and all even-numbered (upper) strips 28b over the second (upper) deflector means 26. The alternating contact of the odd-numbered strips 28a on the first deflector means 24 and the even- numbered strips 28b on the second deflector means 26, because of the vertical spacing v between the deflector means 24, 26, leads to the two strip groups 28a, b running apart in the vertical direction at an angle α which when the strips 28 leave the slitter 22 amounts for example to approximately 5° to 10°. This ensures that adjacent strips do not cross when they leave the slitter 22. Crossing could damage the edges and / or cause the strips to tangle.
The two deflector means 24, 26 are arranged above a pit 30 with a depth t of for example 20 m. The two strip groups 28a, b are guided as two loop groups 32a, b through the pit 30 where the suspension points of the strips 28 on entering the pit 30 are defined by deflector means 24, 26 and on leaving the pit 30 by a deflector roll 34. On the deflector roll 34 are arranged separator discs 36 as side spacers for the strips 28. The distance introduced by the separator discs 36 between directly adjacent strips 28 continues against the direction of running x of the sheet 18 or strips 28 into the pit 30 so that the edges of the strips 28 can no longer make contact with each other even in the rising part of the loops 32.
The horizontal distance h between the deflector means 24, 26 ensures that the strip groups 28a, b are also kept apart in the pit 30.
Evidently, it is also possible, between the slitter 22 and the two deflector means 24, 26, to arrange driven or idle rolls to support and guide the strips 28. The only essential factor is that the last rolls in each case before strips 28 enter the pit 30 correspond in arrangement and function to the deflector means 24, 26.
After deflection of the strips 28 emerging from the pit 30 on the deflector roll 34, said strips are subsequently wound on a second mandrel 40 into strip rolls 42.
Here, the second mandrel 40 is driven by a second drive motor 44. To create tight windings, between the deflector roll 34 and the second mandrel 40 are arranged second pinch rolls 38 similar to the first pinch rolls 20. These pinch rolls 38 generate a friction force acting on the strips 28 which in turn tensions the sheet between the pinch rolls 38 and the strip rolls 42 clamped on the second mandrel 40.
The advantages of the invention were tested by modifying a conventional production line i.e. a line without separation of strips. Before conversion the maximum sheet running speed was 215 m/min. After separating the strips into two strip groups with alternating deflection of adjacent strips 28a, b over deflector means 24, 26 in the form of a PVC tube arranged offset vertically and horizontally, the sheet run speed could be increased to 300 m/min.
A block knife shown in Fig. 3 consists of a pair of first steel discs 48 sitting on a common first shaft 54 and lying against these a second steel disc 50 with a peripheral rubber layer 52. The same arrangement of a first steel disc 48 and lying against this a second steel disc 50 with rubber layer 52 sits on a second shaft 56. The two shafts 54, 56 are arranged parallel to each other where the first steel disc 48 on the first shaft 54 lies opposite the second steel disc 50 with rubber layer 52 on the second shaft 56. In the same way the first steel disc 48 on the second shaft 56 and the second steel disc 50 with rubber layer 52 on the first shaft 54 lie opposite each other. Here, the first steel discs 48 lie under pressure against the rubber layer 52 of the second steel disc 50 in their peripheral area so that the first steel discs 48 opposite each other with an offset overlap slightly in the cutting area and hence lead to a separation of a sheet running through the block knife 46. By arranging in line a multiplicity of block knives 46, a slitter 22 -is created for dividing a sheet 18 into strips 28. As can be seen from Fig. 3, when cutting the sheet 18 into strips 28a, b a relative displacement of adjacent strips in the vertical direction occurs. This positional displacement of directly adjacent strips 28a, b can be advantageously utilised in the present invention as the lower lying strips 28a are guided over the lower deflection means 24 and the higher lying strips 28b over the higher deflector means 26.

Claims

1. Process for production of a multiplicity of strips (28) from a sheet (18), where the sheet (18) which is unwound from a coil (16) is divided into the strips (28) in a slitter (22), and after leaving the slitter (22) the strips (28) form freely hanging loops (32) and are then wound into strip rolls (42),
characterised in that
before formation of the loops (32a, b), directly adjacent strips (28a, b) are spaced apart from each other horizontally and vertically in the direction of running (x) of the sheet (18) or the strips (28).
2. Process according to claim 1 , characterised in that directly adjacent strips (28a, b) are spaced apart such that the edges of the directly adjacent strips (28a, b) do not touch.
3. Process according to claim 1 or 2, characterised in that directly adjacent strips (28a, b) are spaced apart from each other vertically immediately after leaving the slitter (32).
4. Process according to any of claims 1 to 3, characterised in that after leaving the slitter (22), for vertical spacing in the direction of running (x) of the strips (28), directly adjacent strips (28a, b) are guided apart at an acute angle (α) to each other to each other and, before formation of the freely hanging loops (32) are spaced apart from each other horizontally in the running direction of the sheet (18) or the strips (28).
5. Process according to claim 4, characterised in that the angle (α) between directly adjacent strips (28a, b) on leaving the cutter device (22) lies between approximately 1° and 30°, preferably between approximately 5° and 10°.
6. Process according to any of claims 1 to 5 for production of strips (28) from an aluminium alloy as the raw material for cooling fins for heat exchangers and can ring pull tabs.
7. Device for carrying out the process according to any of claims 1 to 6, with arranged in succession in a line, an unwinding device (12, 14) for a sheet (18) wound into a coil (16), a slitter (22) for dividing the sheet (18) into a multiplicity of strips (28), a pit (30) for receiving freely hanging loops (32) formed by the strips (28), and a winding device (40, 42) for winding the strips (28) into strip rolls (42),
characterised in that
after the slitter (22), to guide the strips (28) into the pit (30) as freely hanging loops (32), for horizontal and vertical spacing of directly adjacent loops, are arranged deflector means (24, 26) spaced horizontally and vertically from each other in the direction of running (x) of the sheet (18) or the strips.
8. Device according to claim 7, characterised in that the deflector means (24, 26) are rods or pipes of metal, wood or plastic or consist of a material coated with plastic.
9. Device according to claim 7, characterised in that the deflector means (24, 26) are idle rolls or driven rolls in the direction or running (x) of the sheet (18) or the strips (28).
10. Device according to any of claims 7 to 9, characterised in that the slitter (22) comprises a multiplicity of block knives (46) in a row.
11. Use of a device according to any of claims 7 to 10 for production of strips (28) of an aluminium alloy as a raw material for cooling fins of heat exchangers and for can ring pull tabs.
PCT/GB2002/004054 2001-09-13 2002-09-05 Process and device for production of strips from a sheet WO2003022476A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP01810892 2001-09-13
EP01810892.8 2001-09-13

Publications (1)

Publication Number Publication Date
WO2003022476A1 true WO2003022476A1 (en) 2003-03-20

Family

ID=8184138

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/004054 WO2003022476A1 (en) 2001-09-13 2002-09-05 Process and device for production of strips from a sheet

Country Status (1)

Country Link
WO (1) WO2003022476A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7905443B2 (en) * 2007-10-26 2011-03-15 Papania James F Adjustable vertical accumulator for slitting operation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1502819A1 (en) * 1965-04-09 1969-07-03 Kampf Maschf Erwin Roll cutting machine with cutting device
US3628367A (en) * 1969-12-12 1971-12-21 Littell Machine Co F J Scroll cutting and slitting machine with tension control means
US4155238A (en) * 1975-09-11 1979-05-22 Rogers J W Metal web handling method, apparatus and coil construct
JPS5974848A (en) * 1982-10-23 1984-04-27 Konishiroku Photo Ind Co Ltd Separated transport method of band type material
EP0182945A1 (en) * 1984-11-28 1986-06-04 Precision Strip, Inc. Scroll slitting and rewind apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1502819A1 (en) * 1965-04-09 1969-07-03 Kampf Maschf Erwin Roll cutting machine with cutting device
US3628367A (en) * 1969-12-12 1971-12-21 Littell Machine Co F J Scroll cutting and slitting machine with tension control means
US4155238A (en) * 1975-09-11 1979-05-22 Rogers J W Metal web handling method, apparatus and coil construct
JPS5974848A (en) * 1982-10-23 1984-04-27 Konishiroku Photo Ind Co Ltd Separated transport method of band type material
EP0182945A1 (en) * 1984-11-28 1986-06-04 Precision Strip, Inc. Scroll slitting and rewind apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7905443B2 (en) * 2007-10-26 2011-03-15 Papania James F Adjustable vertical accumulator for slitting operation

Similar Documents

Publication Publication Date Title
US4155238A (en) Metal web handling method, apparatus and coil construct
KR850000585B1 (en) Apparatus for expanding zincor zincalloy strip
CN1077079C (en) Improved rewinding machine for coreless winding of a log of web material with surface for supporting the log in the process of winding
JP2568285B2 (en) Method for manufacturing wrought mesh sheet and apparatus for manufacturing wrought mesh sheet used for the same
EP3150294B1 (en) Cut-to-length steel coil processing line with stretcher leveler and temper mill and method
US4173313A (en) Metal web handling method, apparatus and coil construct
US20040194943A1 (en) Method and apparatus for manufacturing heat exchanger tube
US5829951A (en) Collecting and stacking device for laminar sheets and stacking method
NO770427L (en) PROCEDURE AND DEVICE FOR DISPLAYING PLANE MATERIALS.
JP2587140B2 (en) Method for manufacturing a transformer core made of amorphous slab surrounding iron core window
WO2003022476A1 (en) Process and device for production of strips from a sheet
CN110936414A (en) Film shearing equipment
EP2185350B1 (en) Core winder with forming unit with a toothed belt
AU626310B2 (en) Method and apparatus for handling and further processing a honeycomb band
US4614101A (en) Method of rewinding slit metal strands
CN207061401U (en) Full-automatic three station twines membrane coiler
US4171080A (en) Steel metal web handling method
JPS5912410B2 (en) Apparatus for producing a plurality of strips from sheet metal material that are easily separated from each other and bonded together
MXPA02008761A (en) Device for producing metal fibers.
SU1316725A1 (en) Apparatus for feeding strips to winder drum bite
US5485974A (en) Device for slitting strip metal
US3017694A (en) Metal bending method and product
JPH07112201A (en) Metallic wire rod, manufacture thereof and manufacturing device therefor
CN212072480U (en) Crystal bar wire cutting device
CN212608559U (en) Multilayer material divides a cutting mechanism

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BY BZ CA CH CN CO CR CU CZ DE DM DZ EC EE ES FI GB GD GE GH HR HU ID IL IN IS JP KE KG KP KR LC LK LR LS LT LU LV MA MD MG MN MW MX MZ NO NZ OM PH PL PT RU SD SE SG SI SK SL TJ TM TN TR TZ UA UG US UZ VC VN YU ZA ZM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ UG ZM ZW AM AZ BY KG KZ RU TJ TM AT BE BG CH CY CZ DK EE ES FI FR GB GR IE IT LU MC PT SE SK TR BF BJ CF CG CI GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP