EP3945151A1 - Barre d'outil de tricotage chaîne et procédé de remplacement d'un outil de tricotage - Google Patents

Barre d'outil de tricotage chaîne et procédé de remplacement d'un outil de tricotage Download PDF

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Publication number
EP3945151A1
EP3945151A1 EP20188736.1A EP20188736A EP3945151A1 EP 3945151 A1 EP3945151 A1 EP 3945151A1 EP 20188736 A EP20188736 A EP 20188736A EP 3945151 A1 EP3945151 A1 EP 3945151A1
Authority
EP
European Patent Office
Prior art keywords
knitting tool
knitting
tool bar
tools
bar
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.)
Pending
Application number
EP20188736.1A
Other languages
German (de)
English (en)
Inventor
Torsten Michael BUTZ
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.)
Groz Beckert KG
Original Assignee
Groz Beckert KG
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 Groz Beckert KG filed Critical Groz Beckert KG
Priority to EP20188736.1A priority Critical patent/EP3945151A1/fr
Priority to JP2021125437A priority patent/JP2022027704A/ja
Priority to CN202110871347.3A priority patent/CN114059225A/zh
Publication of EP3945151A1 publication Critical patent/EP3945151A1/fr
Pending legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/06—Needle bars; Sinker bars

Definitions

  • Warp knitting machines for producing warp knitted fabrics have been known for many years.
  • Such machines include several knitting tools - for example knitting needles, yarn guide elements, sliders and sinkers - which have knitting means.
  • These knitting means of the aforementioned knitting tools work together functionally during the stitch formation process, the knitting tools being arranged along the longitudinal direction of knitting tool bars on these knitting tool bars.
  • the knitting tool bars can be driven in a pivoting movement about the axis of rotation of the lever shafts via bar carriers and lever shafts.
  • the term “knitting means” is understood to mean the area or areas of the knitting tools that are functionally involved in the stitch-forming process and are in direct contact with the yarn, at least at times.
  • the knitting means is a hook, for example.
  • the active means point in a working direction that runs transversely to the longitudinal direction of the active tool bar.
  • the knitting tools are usually detachably connected to the knitting tool bars, since they have to be replaced regularly due to wear.
  • the knitting tools of the same type are arranged next to each other at the same distance - or lined up - and adjusted to the knitting tools of the other knitting tool bars so that they interact without collision in the stitch formation process.
  • the warp knitting machine For equipping the warp knitting machine with knitting tools and adjusting the knitting tools to one another, the warp knitting machine must be stopped, which is why it is important to adjust and equip the knitting tools in such a way that set-up times are reduced.
  • the knitting tools are permanently cast in a casting compound, already aligned and arranged at the required distance from one another.
  • all knitting tools of a module can be adjusted together in this way to match the knitting tools of the other bars. which reduces set-up time.
  • the disadvantage here is the high weight of the casting compound and that a complete module always has to be replaced if one of its knitting tools is worn out or defective - even if other knitting tools of this module are still partially functional. When installing the new module, it must then be readjusted again.
  • knitting tool carriers are also known which have a large number of recesses arranged next to one another in the longitudinal direction, in each of which a knitting tool is received and "pressed" onto the knitting tool carrier by means of a cover and a fastening arrangement. The knitting tools are arranged on the knitting tool carrier so that they can be removed individually. If a knitting tool is worn out, it can be replaced individually.
  • the EP3354781A1 shows a bar on whose body a knitting tool carrier is detachably arranged by means of a first fastening arrangement.
  • the knitting tools are detachably arranged on the knitting tool carrier by means of a cover and a second fastening arrangement. In this way, when the second fastening arrangement is loosened, the knitting tools can be exchanged individually, while the knitting tool carrier remains fastened to the bar by the first fastening arrangement. If the first fastening arrangement is loosened, the knitting tool carrier can be adjusted together with the knitting tools relative to the knitting tools of the other bars or can be completely replaced. The knitting tools can be exchanged individually without having to readjust the knitting tool carrier.
  • the use of two independent mounting arrangements increases weight, particularly rotating masses in the event of pivotal movement about the axis of rotation of a lever shaft.
  • the US2902847A shows a knitting tool carrier and the associated knitting tools and their arrangement on a bar.
  • the knitting tools and the knitting tool carrier are detachably arranged on the bar by means of a cover and a single common fastening arrangement.
  • Each knitting tool carrier of the bar is functionally connected to only one cover.
  • a single knitting tool or the entire knitting tool carrier can be exchanged by loosening the fastening arrangement of its associated cover. In both cases, all knitting tool carriers that are clamped to the cover of the loosened fastening arrangement must be readjusted before the fastening arrangement is clamped again in such a way that that their knitting tools interact without collision with the knitting tools of other bars.
  • the invention is therefore based on the object of specifying a knitting tool bar and a method for exchanging knitting tools of a knitting tool bar which enable high working speeds of the warp knitting machine and short set-up and maintenance times.
  • the knitting tool bar according to the invention is characterized in that the fastening arrangement comprises at least a second set of n covers which are suitable and positioned - or can be positioned - for holding the at least one knitting tool carrier, the natural number n being greater than or equal to two, and the at least a knitting tool carrier can already be held by a subset of the second set of n covers, this subset comprising at most n-1 covers.
  • n ⁇ 2 2 ; 3 ; 4 ; 5 ; ... is applicable.
  • the covers are designed to brace the knitting tool carrier with the knitting tool bar and hold it in this way, the covers being detachable and being positioned in a targeted manner in the longitudinal direction of the knitting tool bar and aligned with the knitting tool carriers such that the covers are advantageously arranged. If it is necessary to loosen a cover, for example for maintenance purposes, the knitting tool carrier is held on the knitting tool bar by at least one further cover. As a result, the position of the knitting tool carrier relative to other knitting tool carriers and knitting tools does not subsequently have to be readjusted. Maintenance time and maintenance costs are reduced.
  • the first set of casting tools can include, for example, knitting needles, thread guide elements, sliders and/or knitting sinkers.
  • a cover is advantageous in which the ratio of the cover width b D to the knitting tool carrier width bw b D b w ⁇ 1 , preferably however b D b w ⁇ 0 , 5 is applicable.
  • the width of the cover and the width of the knitting tool carrier extend in the longitudinal direction of the knitting tool bar.
  • the covers can be arranged relative to the knitting tool carriers in such a way that a cover covers half of two adjacent knitting tool carriers and can therefore hold both of them. Therefore, this ratio is considered advantageous.
  • the ratio of the flat width to the width of the knitting tool carrier is b D /b W ⁇ 0.5, there are further advantages;
  • at least three covers are then set up to hold a knitting tool carrier by at least partially overlapping the knitting tool carrier.
  • the knitting tool carrier is held by its third lid when the other two lids that hold this subset of knitting tools are released - for example around one of the knitting tools to exchange this subset of knitting tools.
  • At least one second knitting tool carrier can be held with at least one cover of the at least one fastening arrangement.
  • the covers can be arranged relative to the knitting tool carriers such that the covers, which overlap and thus hold a knitting tool carrier in its edge region, also at least partially overlap a second adjacent knitting tool carrier and also hold this second adjacent knitting tool carrier. With larger flat widths, the set-up effort on the knitting tool bar decreases.
  • the knitting tool bar comprises a longitudinal recess which extends in the longitudinal direction of the knitting tool bar and at least one
  • the knitting tool carrier comprises a longitudinal projection, which extends as far as possible in the longitudinal direction of the knitting tool bar and can preferably be inserted in a form-fitting manner into the longitudinal recess—like a groove running in the longitudinal direction of the knitting tool bar.
  • the form-fit reception (form-fit even when the covers are loosened in the working direction of the knitting tools) of the knitting tool carrier on the knitting tool bar facilitates the alignment of the knitting tool carrier on the knitting tool bar.
  • the knitting tool carrier can then be adjusted in the longitudinal direction of the knitting tool bar relative to other knitting tool carriers and knitting tools, whereas the position in the working direction of the needles is fixed by the positive fit.
  • At least one cover and/or at least one knitting tool carrier and/or the knitting tool bar essentially consist of a fiber-reinforced plastic.
  • Fiber-reinforced plastics that include carbon fibers and/or glass fibers are advantageous.
  • a fiber-reinforced plastic is particularly advantageous which comprises both a first quantity of fibers with a first fiber orientation, which is largely in the working direction of the knitting tools, and a second quantity of fibers with a second fiber orientation, which is largely in the longitudinal direction of the knitting tool bar.
  • the addition of other fibers with other fiber orientations can also have a beneficial effect on the mechanical and thermal properties.
  • Such covers, knitting tool carriers and knitting tool bars which are designed to be suitable for the material and the component stresses that occur, allow a weight reduction compared to components made of metallic materials. The lower weight enables higher working speeds of the knitting machine.
  • the knitting tool carrier comprises recesses--preferably grooves--which run in the working direction of the knitting tools and are suitable for detachably receiving the knitting tools, the recesses in the longitudinal direction of the knitting-tool bar being formed by projections--in the case of the grooves, preferably by webs - are spaced apart. Knitting tools that are arranged in a form-fitting manner in the recesses of the knitting tool carriers are advantageous. Those projections of the knitting tool carrier which are followed by recesses on both sides of the same knitting tool carrier in the longitudinal direction are inner projections. Whereas outer projections are those projections of a knitting tool carrier to which Longitudinally only on one side a recess of the same knitting tool carrier connects.
  • Inner and outer projections can be designed as webs. Webs are projections that delimit grooves. It is particularly advantageous if the width in the longitudinal direction of the knitting tool bar of at least one inner projection—that is, the width of the inner projection—determines the distance between at least two adjacent knitting tools. In this way, when a knitting tool is exchanged, the effort involved in adjusting and aligning the new knitting tool in the knitting tool carrier can be reduced.
  • the at least one fastening arrangement contains at least one cover with which the knitting tools can be held in the recesses of the knitting tool carrier and the knitting tools project beyond the projections of the knitting tool carrier in the height direction.
  • the covers thus hold the knitting tools in the recesses of the knitting tool carrier.
  • the knitting tools in turn hold the knitting tool carrier on the knitting tool bar.
  • the lids are only on the knitting tools on lid support surfaces that correspond to the surfaces of the knitting tools that delimit the knitting tools in their working position in the direction of the lid. In this way, no separate attachment arrangement for holding the knitting tools is required. Weight is saved, which means that the working speed of the knitting machine can be increased.
  • the knitting tools of two covers can be held in the recesses of the at least one knitting tool carrier.
  • the case can arise that, due to a gap between adjacent flats, individual knitting tools are not in contact with one of the flats with their entire flat contact surface. As a result, the knitting tool may no longer be held securely. If, in particular, the knitting tools that can be held by the edge area of a lid can also be held at least partially by a second lid, it can thus be ensured that these knitting tools are also held securely.
  • a cover is advantageous in which at least one cover flank and the working direction enclose a flank angle, the flank angle being greater than 25 degrees and smaller than 45 degrees.
  • the vertical direction is perpendicular to the longitudinal direction the knitting tool bar and perpendicular to the working direction.
  • a flank angle between 30 degrees and 40 degrees brings further advantages, in particular a flank angle of 35°. It is particularly advantageous to select the flank angles such that at least one cover in the plane spanned by the longitudinal direction of the knitting tool bar and the working direction of the knitting tools has the shape of a parallelogram and/or a trapezium. Lids with the shape of a parallelogram can be placed side by side in the same orientation. On the other hand, adjacent lids with the shape of a trapezoid can be arranged rotated by 180 degrees about the height direction in relation to one another.
  • a gap width for the is advantageous 0 , 005 mm ⁇ s ⁇ 0 , 5 mm is applicable.
  • a gap width for the is particularly advantageous 0 , 01 mm ⁇ s ⁇ 0 , 1 mm is applicable.
  • the gap makes it possible to move the knitting tool carriers on the knitting tool bar in the longitudinal direction relative to one another, at least within the limits of the gap width, and to align or adjust them relative to one another. Small manufacturing inaccuracies can thus be compensated for and it can be ensured that the knitting tools of different knitting tool bars are arranged in the longitudinal direction relative to one another in such a way that they move toward one another without colliding during the stitch-forming process.
  • the knitting tools are then arranged at the same distance in the longitudinal direction on the knitting tool carrier and there is the previously described gap between adjacent knitting tool carriers.
  • This shape of the projections facilitates the adjustment of Knitting tools on the knitting tool carriers and the alignment of the knitting tool carriers to adjacent knitting tool carriers.
  • a further advantageous embodiment of the teaching according to the invention results in the knitting tool bar with at least one knitting tool carrier with a knitting tool carrier width bw for which applies.
  • Knitting tool carriers with a large width of the knitting tool carrier offer the advantage that more knitting tools can be accommodated at once with one knitting tool carrier and the knitting tool bar can therefore be completely equipped with a smaller number of knitting tool carriers than would be the case with knitting tool carriers that have a smaller knitting tool carrier width. This reduces the set-up time because overall fewer knitting tool carriers have to be aligned or adjusted.
  • knitting tool carriers with a smaller knitting tool carrier width offer the advantage that they are easier to handle due to their smaller size and lower weight. The size ranges mentioned above for the width of the knitting tool carrier are therefore particularly advantageous.
  • a method for replacing at least one knitting tool of a knitting tool bar is advantageous, with a first set of knitting tools containing the at least one knitting tool being lined up next to one another in their working position along the longitudinal direction of the knitting tool bar.
  • the knitting means of the knitting tools point in a working direction that runs transversely to the longitudinal direction of the knitting tool bar, with a subset of the first set of knitting tools, which contains the at least one knitting tool, being accommodated in a knitting tool carrier that detachably connects this subset of knitting tools to the knitting tool bar.
  • At least one fastening arrangement holds the at least one knitting tool carrier on the knitting tool bar.
  • a method is advantageous in which the fastening arrangement holds the at least one knitting tool carrier with a second set of n covers, where the natural number n is greater than or equal to two, and at most n-1 covers are loosened, the at least one knitting tool being released, and the at least one knitting tool is exchanged for at least one other knitting tool.
  • Being able to exchange the knitting tool and only having to solve n-1 covers has the advantage that the Knitting tool holder itself is still held during the exchange of at least one cover. In this way, the knitting tool carrier retains its position despite the exchange and does not have to be readjusted after the knitting tool has been replaced.
  • the method according to the invention provides further advantages if at least one knitting tool is replaced by a maintenance gap, the maintenance gap between the knitting tool carrier and at least one of the at most n ⁇ 1 loosened covers being created when the latter is loosened.
  • the at most n ⁇ 1 covers are loosened just far enough for a maintenance gap to form between the knitting tool carrier and the knitting tool, which gap is large enough to pass the knitting tool to be replaced through this gap.
  • the maintenance gap is set in such a way that it corresponds at least to the maximum foot height of the knitting tool. In this way it is ensured that the maintenance gap is always large enough to pass the knitting tool.
  • the knitting tool carrier the knitting tool and the lid, it may also be possible to replace the knitting tool with a maintenance gap that is smaller than the maximum foot height of the knitting tool.
  • a maintenance gap that is smaller than the maximum foot height of the knitting tool.
  • an elastic insert is arranged between the cover and the knitting tools.
  • the maintenance gap occurs between the knitting tool carrier and the elastic insert.
  • FIG. 1 shows a sectional view of the knitting tool bar 1 with a knitting tool carrier 2 which engages with its longitudinal projection 17 in a form-fitting manner in a longitudinal recess 18 of the knitting tool bar 1 .
  • the section shown runs through a groove 11 of the knitting tool carrier 2 which is delimited by a web 10 .
  • the knitting tool 3 carries a working means 8 in the form of a hook and is arranged in a groove 11 which is not in the cutting plane.
  • the knitting tool 3 protrudes beyond the web 10 in the height direction z.
  • the fastening arrangement 5 comprises a number of covers 4 - in the sectional view all the covers 4 except one are covered - a number of screws 6 and a number of perforated disks 7.
  • the screws 6 generate clamping forces which the cover 4 together with an elastic insert 9, the knitting tools 3 and brace the knitting tool carrier 2 against the knitting tool bar 1 and hold it in position.
  • FIG 2 shows a different view of the already in 1 elements shown.
  • the fastening arrangement 5 comprises three covers 4 with the same cover width b D and two screws 6 each and two perforated disks 7 per cover 4.
  • the ratio of the cover width b D to the active tool carrier width bw is less than 0.5.
  • width ratios for which b D /b W >1 applies are also conceivable.
  • the covers 4 have a cross section in the form of a parallelogram and are inclined at the cover flanks 20 by the flank angle 19 with respect to the working direction y. Furthermore, three knitting tool carriers 2 with a knitting tool carrier width bw can be seen, with two of the three knitting tool carriers 2 not being shown in full—this is shown in the drawing by the delimiting break lines.
  • the grooves 11 of the 2 middle knitting tool carrier 2 are equipped with the exception of a groove 11 with 3 knitting tools.
  • the grooves 11 in the 2 Right and left knitting tool carrier 2 are empty - so not equipped with 3 knitting tools. This representation is for illustrative purposes. In a working state can all Grooves 11 be equipped with knitting tools 3.
  • lid edge area 21 it can be seen that one of the knitting tools 3 is held within this lid edge area 21 with two lids 4 - in 2 the middle and the left of the three lids 4. These two lids 4 are both in contact with the respective lid contact surfaces 12 of these knitting tools 3 in the lid edge area 21.
  • figure 3 shows detail A 2 .
  • Two knitting tool carriers 2 and the gap s between the two knitting tool carriers 2 are shown.
  • the Indian 3 left knitting tool carrier 2 is shown with five grooves 11, of which four grooves 11 are equipped with knitting tools 3 and a groove 11 is "empty". Both knitting tool carriers 2 are held in the area of detail A by a cover 4 .
  • Inner projections 15 with an inner projection width b IV are shown between the grooves 11 and the knitting tools 3 .
  • the outer projections 10, which directly adjoin the gap s, are outer projections 16 with an outer projection width b AV .
  • the ratio of the size of the outer projection width b AV and the size of the inner projection width b IV corresponds to the above formula.
  • FIG. 12 shows a sectional view of the knitting tool bar 1 at the same position as the sectional view 1 .
  • the cover 4 is not in its working position but in a maintenance position in which there is a maintenance gap 14 between the elastic insert 9 of the cover 4 and the groove base 24 of the knitting tool carrier 2 .
  • the groove bottom 24 limits the groove 11 in the height direction z.
  • the maximum foot height 22 on the knitting tool 3 is shown, which in this exemplary embodiment is smaller than the maintenance gap height 23.
  • the knitting tool 3 can be removed from the knitting tool carrier 2 through the maintenance gap 14 or inserted into it without the cover 4 being completely removed from the knitting tool bar 1 solve.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
EP20188736.1A 2020-07-30 2020-07-30 Barre d'outil de tricotage chaîne et procédé de remplacement d'un outil de tricotage Pending EP3945151A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20188736.1A EP3945151A1 (fr) 2020-07-30 2020-07-30 Barre d'outil de tricotage chaîne et procédé de remplacement d'un outil de tricotage
JP2021125437A JP2022027704A (ja) 2020-07-30 2021-07-30 編み具バーおよび編み具を交換する方法
CN202110871347.3A CN114059225A (zh) 2020-07-30 2021-07-30 编织工具杆和用于替换编织工具的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20188736.1A EP3945151A1 (fr) 2020-07-30 2020-07-30 Barre d'outil de tricotage chaîne et procédé de remplacement d'un outil de tricotage

Publications (1)

Publication Number Publication Date
EP3945151A1 true EP3945151A1 (fr) 2022-02-02

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ID=71894740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20188736.1A Pending EP3945151A1 (fr) 2020-07-30 2020-07-30 Barre d'outil de tricotage chaîne et procédé de remplacement d'un outil de tricotage

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Country Link
EP (1) EP3945151A1 (fr)
JP (1) JP2022027704A (fr)
CN (1) CN114059225A (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1848293A (en) * 1930-01-16 1932-03-08 Wildman Mfg Co Needle bar for full fashioned knitting machines
US2254201A (en) * 1940-03-01 1941-09-02 Alfred Hofman & Company United needle mounting
US2902847A (en) 1955-02-23 1959-09-08 Karl Mayer Erste Hessische Wir Needle holder
US5453146A (en) * 1993-02-02 1995-09-26 Karl Mayer Textilmaschinenfabrik Gmbh Process for the production of a needle bar
EP3354781A1 (fr) 2017-01-25 2018-08-01 Karl Mayer Textilmaschinenfabrik GmbH Barre de machine à tricoter et support d'outils de tricotage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1848293A (en) * 1930-01-16 1932-03-08 Wildman Mfg Co Needle bar for full fashioned knitting machines
US2254201A (en) * 1940-03-01 1941-09-02 Alfred Hofman & Company United needle mounting
US2902847A (en) 1955-02-23 1959-09-08 Karl Mayer Erste Hessische Wir Needle holder
US5453146A (en) * 1993-02-02 1995-09-26 Karl Mayer Textilmaschinenfabrik Gmbh Process for the production of a needle bar
EP3354781A1 (fr) 2017-01-25 2018-08-01 Karl Mayer Textilmaschinenfabrik GmbH Barre de machine à tricoter et support d'outils de tricotage

Also Published As

Publication number Publication date
CN114059225A (zh) 2022-02-18
JP2022027704A (ja) 2022-02-14

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