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CN-224224008-U - Die cutting system for flexible materials

CN224224008UCN 224224008 UCN224224008 UCN 224224008UCN-224224008-U

Abstract

The application relates to a die cutting system for flexible materials, comprising a knife roller (100) having a knife roller body (5) and at least one knife (1) detachably mounted in the knife roller body (5), and a support roller (200) having a support roller body (8) and at least one anvil (6) detachably mounted in the support roller body (8), wherein the die cutting system is configured such that during operation each knife (1) of the at least one knife (1) is capable of interacting with one anvil (6) of the at least one anvil (6) to effect cutting of the flexible material. Therefore, the single abrasion cutter or the single abrasion anvil can be replaced simply, conveniently, locally and timely, the replacement and maintenance cost of the roller is greatly reduced, and the cutting accuracy is always ensured. Meanwhile, the cutting performance of the die cutting system can be improved in a mode of 'partially replacing the whole' by only strengthening the cutter and the anvil.

Inventors

  • QI BIN
  • M. Kojaqinar
  • WANG JING
  • SHI FENG

Assignees

  • 罗伯特·博世有限公司

Dates

Publication Date
20260512
Application Date
20250519

Claims (10)

  1. 1. A die cutting system for flexible materials, the die cutting system comprising: A knife roll (100) having a knife roll body (5) and at least one knife (1) detachably mounted in the knife roll body (5), and A support roller (200) having a support roller body (8) and at least one anvil (6) detachably mounted in the support roller body (8), Wherein the die cutting system is configured such that during operation each knife (1) of the at least one knife (1) is capable of interacting with one anvil (6) of the at least one anvil (6) to effect cutting of the flexible material.
  2. 2. The die cutting system for flexible materials as recited in claim 1, wherein, The tool (1) has a greater hardness than the tool roll body (5) at least at the tip (11), and/or The anvil (6) has a greater hardness than the support roller body (8) at least at the outer surface.
  3. 3. The die cutting system for flexible materials according to claim 1 or 2, wherein the knife roll (100) further has: a height adjusting device (2) adapted to adjust the height of the cutter (1) relative to the circumferential surface of the cutter roller body (5), and A knife fastening device (3) adapted to fasten the knife (1) to the knife roller body (5), Wherein the height adjustment device (2) acts directly on the tool (1) or acts on the tool (1) via the tool fastening device (3).
  4. 4. A die cutting system for flexible materials according to claim 3, characterized in that the knife fastening means (3) comprises: a first portion (31) connected to the knife roller body (5) by a first connection structure (33); a second portion (32) connected to the first portion (31) by a second connection structure (34), Wherein the first portion (31) and the second portion (32) together fix the tool (1) in the middle.
  5. 5. The die cutting system for flexible materials as recited in claim 4, wherein, The height adjustment means (2) acts on the first portion (31) to urge the cutter (1) outwardly relative to the peripheral surface of the cutter roller body (5), and/or The height adjusting device (2) is held in a projection (52) of the cutter roller body (5).
  6. 6. A die cutting system for flexible materials as claimed in claim 3, wherein, The height adjustment device (2) has a bevel and the height adjustment device (2) is configured such that the knife (1) can be pushed by the bevel to move along the bevel to move the knife (1) outwardly relative to the circumferential surface of the knife roller body (5), and/or The height adjustment means (2) extends inwardly from the peripheral surface of the cutter roller body (5) to contact the bottom of the cutter (1).
  7. 7. A die cutting system for flexible materials as claimed in claim 3, wherein, The height adjusting device (2) is an adjusting bolt and/or The knife roller (100) has a plurality of height adjusting devices (2) and a plurality of knife fastening devices (3) which are equally spaced along the axial direction (X) thereof, and/or The height adjustment means (2) and the tool fastening means (3) corresponding to the same tool (1) are located on the same side of the respective tool (1).
  8. 8. The die cutting system for flexible materials according to any one of claims 1, 2, 4-7, wherein, The tool (1) has a taper angle (alpha) of 55+ -5 DEG, a width (w) of 0.03+ -0.01 mm, and/or The number of the anvil (6) is an integer multiple of the number of the cutters (1).
  9. 9. The die cutting system for flexible materials as recited in claim 2, wherein, The tool (1) is made of cemented carbide by a powder metallurgical process, and/or The tool (1) has a coating made by a physical vapor deposition process at least at the tip (11) and having a thickness in the range of 5 μm to 25 μm, and/or The anvil (6) is made of cemented carbide by a powder metallurgical process, and/or The anvil (6) has a coating at least at the surface made by a physical vapour deposition process, the thickness of which is in the range of 5 μm to 25 μm.
  10. 10. The die cutting system for flexible materials according to any one of claims 1, 2, 4-7, 9, wherein, The flexible material is used to fabricate a membrane electrode assembly of a fuel cell.

Description

Die cutting system for flexible materials Technical Field The present application relates to a die cutting system for flexible materials, and in particular for manufacturing membrane electrode assemblies for fuel cells. Background Currently, conventional die cutting systems with integral dies are commonly employed to cut flexible materials for use in manufacturing membrane electrode assemblies of fuel cells. The die comprises a knife roller and a support roller, wherein the knife roller mainly refers to a die cutter provided on a roller body and used for being matched with the support roller to cut flexible materials fed between the knife roller and the support roller. The existing knife rolls and backup rolls are typically integral rolls made of common tool steels such as those produced by an electroslag remelting process. However, the integral roller design has the defects of short service life of the cutter, high replacement cost, long period, integral replacement after single-blade breakage, difficult unification of the heights of the blades, integral heat treatment of the roller body and the like. Therefore, there is a need for improved solutions. Disclosure of utility model The object of the present application is to provide an improved die cutting system for flexible materials in order to solve at least one of the above mentioned technical problems and other technical problems not mentioned. According to a first aspect of the present application there is provided a die cutting system for flexible material comprising a knife roller having a knife roller body and at least one knife removably mounted in the knife roller body, and a support roller having a support roller body and at least one anvil removably mounted in the support roller body, wherein the die cutting system is configured such that during operation each of the at least one knife can interact with one of the at least one anvil to effect cutting of the flexible material. According to an alternative embodiment of the application, the knife has a greater hardness than the knife roller body at least at the knife tip. According to an alternative embodiment of the application, the anvil has a greater hardness than the support roller body at least at the outer surface. According to an alternative embodiment of the application, the knife roll further has a height adjustment device adapted to adjust the height of the knife relative to the circumferential surface of the knife roll body, and a knife fastening device adapted to fasten the knife to the knife roll body, wherein the height adjustment device acts directly on the knife or acts on the knife through the knife fastening device. According to an alternative embodiment of the application, the tool fastening arrangement comprises a first part connected to the knife roller body by a first connection structure, and a second part connected to the first part by a second connection structure, wherein the first part and the second part together fix the tool in between. According to an alternative embodiment of the application, the height adjustment means acts on the first portion to urge the cutter to move outwardly relative to the peripheral surface of the cutter roller body. According to an alternative embodiment of the application, the height adjustment means are held in a projection of the knife roller body. According to an alternative embodiment of the application, the height adjustment means has a ramp and the height adjustment means is configured such that the knife is movable along the ramp by being urged by the ramp to move the knife outwardly relative to the circumferential surface of the knife roller body. According to an alternative embodiment of the application, the height adjustment means extends inwardly from the peripheral surface of the cutter roller body to contact the bottom of the cutter. According to an alternative embodiment of the application, the height adjustment means is an adjustment bolt. According to an alternative embodiment of the application, the knife roll has a plurality of height adjustment means and a plurality of knife fastening means equally spaced in its axial direction. According to an alternative embodiment of the application, the height adjustment means and the tool fastening means are located on the same side of the respective tools. According to an alternative embodiment of the application, the angle of taper of the tip of the tool is 55+ -5 DEG and the width is 0.03+ -0.01 mm. According to an alternative embodiment of the application, the number of anvil is an integer multiple of the number of cutters. According to an alternative embodiment of the application, the tool is made of cemented carbide by a powder metallurgical process. According to an alternative embodiment of the application, the tool has a coating at least at the tip, which coating is made by a physical vapour deposition process and has a thickness in the range of 5 μm to 25 μm. According to an