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DE-102024132797-A1 - Needle machine and method for operating such a machine

DE102024132797A1DE 102024132797 A1DE102024132797 A1DE 102024132797A1DE-102024132797-A1

Abstract

An inventive method for operating a needle machine (2) comprises superimposing a first horizontal stroke component of needle tips of a plurality of needles (12) and a second horizontal stroke component of the needle tips of the plurality of needles (12) and thereby generating a predetermined horizontal stroke (H) whose magnitude is both greater than an magnitude of the first horizontal stroke component and greater than an magnitude of the second horizontal stroke component.

Inventors

  • Johann Philipp Dilo
  • Rebekka Dilo

Assignees

  • OSKAR DILO, MASCHINENFABRIK, KOMMANDITGESELLSCHAFT

Dates

Publication Date
20260513
Application Date
20241111

Claims (20)

  1. Method for operating a needle-punching machine (2) with a needle bar assembly (4) for needle-punching a textile fabric (2), wherein the needle bar assembly (4) has at least one needle bar (8, 10) with a plurality of needles (12), and the method comprises: generating a vertical stroke (V) of the needle bar assembly (4) by means of a first drive arrangement (20) comprising a first shaft (22), a second shaft (26), a first connecting rod (24) and a second connecting rod (28), wherein the first connecting rod (24) and the second connecting rod (28) are each pivotally coupled to the needle bar assembly (4), the first connecting rod (24) is eccentrically mounted on the first shaft (22) and the second connecting rod (28) is eccentrically mounted on the second shaft (26), and wherein the first shaft (22) and the second shaft (26) are driven in opposite directions; Generating a first horizontal stroke component of the needle tips of the plurality of needles (12) by means of the first drive arrangement (20) in that the first shaft (22) and the second shaft (26) have a phase difference; generating a second horizontal stroke component of the needle tips of the plurality of needles (12) by means of a second drive arrangement (30) comprising a third connecting rod (34) which is articulated is coupled to the needle bar assembly (4) and has a horizontal motion component (T) which it transmits to the needle bar assembly (4); wherein the first horizontal stroke component and the second horizontal stroke component overlap and thereby generate a predetermined horizontal stroke (H) whose magnitude is both greater than an magnitude of the first horizontal stroke component and greater than an magnitude of the second horizontal stroke component.
  2. Procedure according to Claim 1 , characterized in that the vertical stroke (V) and the horizontal stroke (H) overlap and produce a substantially elliptical motion path of the needle tips of the plurality of needles (12).
  3. Procedure according to Claim 1 or 2 , characterized in that the first horizontal lifting component and the second horizontal lifting component are aligned parallel to each other and parallel to a conveying direction (F) of the textile fabric (2) through the needle machine (2).
  4. Procedure according to one of the Claims 1 until 3 , characterized in that the first horizontal stroke component and the second horizontal stroke component superimpose in such a way that the magnitude of the first horizontal stroke component and the magnitude of the second horizontal stroke component add up to a predetermined magnitude of the horizontal stroke (H).
  5. Procedure according to Claim 4 , characterized in that the amount of the first horizontal stroke component is variable.
  6. Procedure according to Claim 5 , characterized in that the method further comprises: adjusting the phase difference and thereby the magnitude of the first horizontal stroke component.
  7. Procedure according to Claim 6 , characterized in that the first drive arrangement (20) comprises a first reversing gear (44) between the first shaft (22) and the second shaft (26) and further comprises adjusting the phase difference: decoupling a rotation of the first shaft (22) from a rotation of the second shaft (26), and twisting the first shaft (22) or the second shaft (26) by means of a rotary drive (56).
  8. Procedure according to Claim 7 , characterized in that the method further comprises: determining a target value of the first horizontal stroke component; determining a target phase difference based on the target value of the first horizontal stroke component; rotating the first shaft (22) or the second shaft (26) by means of the rotary drive (56) such that an actual phase difference corresponds to the target phase difference.
  9. Procedure according to one of the Claims 4 until 8 , characterized in that the maximum amount of the first horizontal stroke component is between 5 mm and 20 mm, preferably between 8 mm and 15 mm.
  10. Procedure according to one of the Claims 4 until 9 , characterized in that the magnitude of the first horizontal stroke component and the magnitude of the second horizontal stroke component are each half the magnitude of the horizontal stroke (H).
  11. Procedure according to one of the Claims 4 until 10 , characterized in that the magnitude of the second horizontal stroke component is constant.
  12. Procedure according to one of the Claims 4 until 11 , characterized in that the amount of the second horizontal stroke component is between 5 mm and 40 mm, preferably between 10 mm and 30 mm.
  13. Method according to one of the preceding claims, characterized in that the second drive arrangement (30) comprises a third shaft (32), wherein the third connecting rod (34) is mounted eccentrically on the third shaft (32) and wherein the third shaft (32) rotates constantly.
  14. Needle machine (2) for needle-punching a textile fabric (2), wherein the needle machine (2) comprises: a needle bar arrangement (4) having at least one needle bar (8, 10) with a plurality of needles (12); a first drive arrangement (20) configured to generate a vertical stroke (V) of the needle bar arrangement (4) and a first horizontal stroke component of needle tips of the plurality of needles (12), wherein the first drive arrangement (20) comprises a first shaft (22), a second shaft (26), a first connecting rod (24), a second connecting rod (28), and a first reversing gear (44), wherein the first connecting rod (24) and the second connecting rod (28) are each pivotally coupled to the needle bar arrangement (4), the first connecting rod (24) being eccentrically mounted in a first crank section (52) of the first shaft (22), and the second connecting rod (28) being eccentrically mounted in a second crank section (54) of the second shaft (26); and a second drive arrangement (30) configured to generate a second horizontal stroke component of the needle tips of the plurality of needles (12), wherein the second drive arrangement (30) comprises a third connecting rod (34) pivotally coupled to the needle bar arrangement (4); wherein the first reversing gear (44) couples a first transmission section (46) of the first shaft (22) with a second transmission section (48) of the second shaft (26) and the first shaft (22) and the second shaft (26) have a phase difference; wherein the first drive arrangement (20) comprises a switchable first clutch (50) separably connecting the first crank section (52) and the first transmission section (46).
  15. Needle machine (2) after Claim 14 , characterized in that the needle machine (2) is set up and designed to perform the method according to one of the Claims 1 until 13 to execute.
  16. Needle machine (2) after Claim 14 or 15 , characterized in that the first clutch (50) connects the first crank section (52) and the first transmission section (46) in an engaged state and separates the first crank section (52) and the first transmission section (46) from each other in an unengaged state.
  17. Needle machine (2) according to one of the Claims 14 until 16 , characterized in that the first drive arrangement (20) comprises a first rotary drive (56) coupled to a first crank section (52) and the first transmission section (46).
  18. Needle machine (2) after Claim 17 , characterized in that the first drive arrangement (20) comprises a second rotary drive (58) which is coupled to the other from the first transmission section (46) and the first crank section (52).
  19. Needle machine (2) after Claim 17 , characterized in that the first drive arrangement (20) comprises a second rotary drive (58) which is coupled to the second transmission section (48) or the second crank section (54).
  20. Needle machine (2) according to one of the Claims 17 until 19 , characterized in that the needle machine (2) comprises a control device (68) which is configured to control the first rotary drive (56) based on a target value of the first horizontal stroke component such that a phase difference between the first shaft (22) and the second shaft (26) causes the target value of the first horizontal stroke component.

Description

The present invention relates to a needle-punching machine for needle-punching a textile fabric, such as a fiber web, a nonwoven fabric, a woven fabric or a laid fabric, and to a method for operating such a needle-punching machine. Needle knitting machines are generally known and are described, for example, in Fuchs and Albrecht: “Nonwovens”, Wiley-VCH Verlag Weinheim, 2nd edition 2012 or also in Albrecht, Fuchs, Kittelmann: “Nonwovens”, Wiley-VCH Verlag Weinheim, 2000. In needle-punching machines, a textile fabric is typically fed into the machine at an inlet and conveyed in a conveying direction to a needle zone. Within this zone, a needle bar assembly is provided, comprising at least one needle bar on which a needle board is mounted. This board is equipped with a multitude of needles for consolidating the textile fabric. The multitude of needles consolidates the textile fabric by being inserted into and withdrawn from it at high frequency via a vertical stroke. Various forms of needle-punching machines are known to those skilled in the art, including machines in which the multitude of needles move along with the textile fabric during the consolidation process by means of a horizontal stroke in the conveying direction. It is desirable to be able to adapt both the vertical and horizontal stroke to the specific requirements of each case, such as transport speed, thickness, material, and material density of the textile fabric. Known mechanisms for generating vertical and horizontal strokes reach their limits because, for example, stronger vibrations are generated with increasing stroke, or the numerous needles become increasingly tilted relative to the insertion and conveying directions, thus increasing the risk of needle breakage. The present invention is based on the objective of providing a needle machine and a method for operating a needle machine which, with the simplest and most cost-effective design of the needle machine and with low stress on the multitude of needles and other components of the needle machine, enable a large horizontal stroke. This problem is solved by the features of claim 1 and claim 14. Preferred embodiments are the subject of the dependent claims. A method according to the invention for operating a needle-punching machine with a needle bar arrangement for needle-punching a textile fabric, wherein the needle bar arrangement comprises at least one needle bar with a plurality of needles, comprising: Generating a vertical stroke of the needle bar assembly by means of a first drive arrangement comprising a first shaft, a second shaft, a first connecting rod and a second connecting rod, wherein the first connecting rod and the second connecting rod are each pivotally coupled to the needle bar assembly, the first connecting rod is eccentrically mounted on the first shaft and the second connecting rod is eccentrically mounted on the second shaft, and wherein the first shaft and the second shaft are driven in opposite directions; Generating a first horizontal stroke component of needle tips of the plurality of needles by means of the first drive arrangement, in that the first shaft and the second shaft have a phase difference; Generating a second horizontal stroke component of the needle tips of the plurality of needles by means of a second drive arrangement comprising a third connecting rod which is articulated to the needle bar arrangement and has a horizontal motion component which it transmits to the needle bar arrangement. The first horizontal stroke component and the second horizontal stroke component overlap, thereby creating a predetermined horizontal stroke whose magnitude is greater than both the magnitude of the first horizontal stroke component and the magnitude of the second horizontal stroke component. In this way, a method for operating a needle roller machine is provided in which the horizontal stroke is generated by superimposing the first and second horizontal stroke components, which in turn are generated by different kinematics according to the first and second drive arrangements. This allows a predetermined horizontal stroke to be achieved, but the magnitude of the first and second horizontal stroke components can each be smaller than the desired or required predetermined horizontal stroke, which in turn has a positive effect on the first and second drive arrangements as well as on the needle roller assembly. The first drive arrangement, for example, causes a tilting movement of the needle bar assembly around an axis perpendicular to both the conveying direction and the insertion direction, due to the phase difference. This tilting movement results in the first horizontal stroke component of the needle tips. If the amount of this first horizontal stroke component required to achieve the predetermined horizontal stroke can be kept low, a smaller tilting movement of the needle bar assembly is required, and thus a smaller inclination of the numerous needles is necessary,