Search

RU-2025139260-A - DEVICE FOR CHECKING EXTRUSION MACHINE SETTINGS AND THE CORRESPONDING METHOD

RU2025139260ARU 2025139260 ARU2025139260 ARU 2025139260ARU-2025139260-A

Inventors

  • ШУХ, Колья Тобиас
  • СИКОРА, Харальд

Assignees

  • СИКОРА ГМБХ

Dates

Publication Date
20260508
Application Date
20240415
Priority Date
20230608

Claims (20)

  1. 1. A device for checking the settings of an extrusion machine (20) producing a tubular object (10) moved in a direction of movement, wherein said extrusion machine (20) is adjusted in such a way that the extruded material discharged by its extrusion head is characterized by different values of discharge width in the upper and lower parts of this head, wherein the device comprises:
  2. a first wall thickness measuring unit (24) configured to measure the thickness (40, 42) of at least one wall of the tubular object (10) at a first measurement point located in front of at least one cooling section (26), when viewed in the direction of movement of the tubular object (10),
  3. a second wall thickness measuring unit (25) configured to measure the thickness (40, 42) of said at least one wall of the tubular object (10) at a second measurement point located after the first measurement point, when viewed in the direction of said movement,
  4. an analyzing unit (38) receiving wall thickness measurement data from a first wall thickness measurement unit (24) and wall thickness measurement data from a second wall thickness measurement unit (25), wherein the wall thickness measurement data from the first unit (24) is delayed by a delay unit relative to the wall thickness measurement data from the second unit (25), wherein the time of said delay corresponds to the time of movement of the object (10) between the first and second measurement points,
  5. wherein the analyzing unit (38) is configured to check the relationship between the values of the output width of the extruded material, set in the extrusion machine (20) in relation to the upper and lower parts of the extrusion head, by comparing the wall thickness measurement data coming from the first unit (24) and delayed by the delay unit, with the wall thickness measurement data coming from the second unit (25).
  6. 2. The device according to claim 1, characterized in that said first measuring point is located after the first cooling section (22), but before at least one additional cooling section (26) for cooling the tubular object (10), while said second measuring point is located after all cooling sections (22, 26) for cooling the tubular object (10).
  7. 3. The device according to any one of paragraphs. 1, 2, characterized in that the first unit (24) for measuring the wall thickness measures at a first measurement point the thickness (40, 42) of the wall in the upper part of the tubular object (10), at least at one measurement location, and also at the lower part of the tubular object (10), at least at one measurement location, while the second unit (25) for measuring the wall thickness measures at a second measurement point the thickness (40, 42) of the wall in the upper part of the tubular object (10), at least at one measurement location, and also at the lower part of the tubular object (10), at least at one measurement location.
  8. 4. The device according to claim 3, characterized in that the analyzing unit (38) is designed in such a way that when comparing the wall thickness measurement data, it takes into account the sag coefficient indicating the expected sag of the tubular object (10) between the first and second measurement points.
  9. 5. The device according to claim 4, characterized in that the analyzing unit (38) is designed with the ability to check the sag coefficient by comparing the wall thickness measurement data, as well as with the ability to correct it if necessary.
  10. 6. The device according to claim 5, characterized in that the analyzing unit (38) is configured to compare the actual sag of the tubular object (10) between the first and second measurement points with the expected sag between the first and second measurement points, carried out by comparing the wall thickness measurement data.
  11. 7. The device according to claim 6, characterized in that the analyzing unit (38) is configured to compare the ratio between the thicknesses (40, 42) of the walls in the upper and lower parts of the tubular object (10) at the first measurement point with the ratio between the thicknesses of the walls in the upper and lower parts of the tubular object (10) at the second measurement point, in order to thereby compare the actual sag with the expected sag.
  12. 8. The device according to any one of paragraphs. 6, 7, characterized in that the analyzing unit (38) is configured to adjust the sag coefficient upon detection of a deviation between the specified actual and expected sag and/or with the ability to display the required ratio between the output widths of the extruded material in the upper and lower parts of the extrusion head, ensuring the required geometry of the wall thickness of the tubular object (10), and/or with the ability to set it by controlling the extrusion machine (20).
  13. 9. A device according to any one of paragraphs 1-8, characterized in that said first and/or second wall thickness measuring units (24, 25) are a terahertz measuring unit (24, 25) or an X-ray measuring unit.
  14. 10. A device according to any one of paragraphs 1-9, characterized in that said first and/or second wall thickness measuring units (24, 25) are a portable hand-held measuring device.
  15. 11. The device according to item 10, characterized in that said first and second wall thickness measuring blocks (24, 25) are formed by the same wall thickness measuring block.
  16. 12. A device according to any one of paragraphs 10-11, in which a holder is provided for said first and/or second wall thickness measuring blocks (24, 25), installed at the first and/or second measurement points.
  17. 13. A device according to any one of paragraphs 1-12, characterized in that the analyzing unit (38) is additionally configured to determine the refractive index of the material of the tubular object (10) at the first measurement point and at the second measurement point based on the wall thickness measurement data obtained from the first wall thickness measurement unit (24), as well as the wall thickness measurement data obtained from the second wall thickness measurement unit (25).
  18. 14. The device according to any one of paragraphs 1-13, characterized in that the analyzing unit (38) is designed in such a way that when checking the settings of the extrusion machine (20), it takes into account the parameters of the material of the tubular object (10), in particular, its thermal conductivity and/or heat capacity, and/or production parameters, in particular the temperature of the extrusion head and/or the discharge speed of the extrusion machine (20), and/or the cooling parameters of the tubular object (10) being manufactured.
  19. 15. The device according to any one of paragraphs. 1-14, characterized in that it also includes an extrusion machine (20) and/or said at least one cooling section (22, 26) and/or a moving unit for moving the tubular object (10) in said direction of movement, and/or the tubular object (10).
  20. 16. A method for checking the settings of an extrusion machine (20) producing a tubular object (10) moved in a direction of movement, wherein said extrusion machine (20) is adjusted in such a way that the extruded material discharged by its extrusion head is characterized by different values of discharge width in the upper and lower parts of said head, wherein the method is carried out using a device according to any of paragraphs 1-15.