EP3841239A1 - Vorrichtung und verfahren zum vorlegen eines fadens - Google Patents
Vorrichtung und verfahren zum vorlegen eines fadensInfo
- Publication number
- EP3841239A1 EP3841239A1 EP19756155.8A EP19756155A EP3841239A1 EP 3841239 A1 EP3841239 A1 EP 3841239A1 EP 19756155 A EP19756155 A EP 19756155A EP 3841239 A1 EP3841239 A1 EP 3841239A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thread
- tools
- eyelet
- designed
- row
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 7
- 239000004753 textile Substances 0.000 claims abstract description 23
- 238000009940 knitting Methods 0.000 description 42
- 239000004744 fabric Substances 0.000 description 7
- 230000002787 reinforcement Effects 0.000 description 5
- 210000002105 tongue Anatomy 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000009958 sewing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B23/00—Flat warp knitting machines
- D04B23/12—Flat warp knitting machines with provision for incorporating unlooped wefts extending from selvedge to selvedge
Definitions
- the invention relates to a device for presenting a thread for stitch-forming tools of a textile machine, which are arranged in at least one row.
- the device comprises a thread guide device with a rotating element and a thread guide, the thread guide device being designed to move a thread back and forth in two directions in a stroke area in front of the row of tools.
- the invention also relates to a textile machine equipped with the device.
- a textile machine designed as a warp knitting machine, in particular as a Raschel machine, is described in DE 1 268 305 A, for example.
- a thread provided as a weft thread is presented by a thread guide of a long-weft device, which can be moved between two reversal points by means of an actuating cylinder, during a stitch formation process approximately parallel to the row of knitting needles on the rear side thereof.
- the weft thread is brought onto the front of the knitting needle row under the action of suction nozzles. Since the thread guide has to be accelerated and braked between the reversal points, the speed at which the thread guide can be moved by means of the actuating cylinder is limited.
- a device for the insertion of weft threads for warp knitting machines, in particular for Raschel machines in which a thread guide guided on an orbit is provided.
- a rotary element designed as a rod is provided, at the end of which the thread guide is arranged.
- the rod can be rotated in a direction of rotation about an axis directed perpendicular to its direction of extension.
- the weft thread is guided from the bobbin through the axis of the rod to the thread guide.
- holding elements are provided, around which the weft threads can be placed by the thread guide.
- the drive for the holding elements is matched to the rotational movement of the rod in such a way that the weft threads do not cross between the holding elements.
- the holding elements also serve as guide members for applying the weft threads to the warp threads.
- Another warp knitting machine in particular Raschel machine, with a device for inserting a weft thread is known from DE 1 920 477 A.
- the weft thread is made available outside the needle zone by means of holding elements arranged in the area of the web edges and is applied to the warp threads by means of guide members.
- Several weft guides are provided on an orbit, each of which is assigned a bobbin holder running synchronously with it. Between the thread guides and the knitting needles, storage members are arranged to accommodate several lengths of weft thread corresponding to the fabric width.
- a device for providing weft threads on warp knitting machines is described in DE 20 35 007 A.
- the device comprises a thread guide consisting of a tube, which is guided by a circulating belt over reversal points in the area of the web edges.
- Storage devices are provided which take up the individual weft thread lengths and which are moved in the direction of the knitting tools.
- DE 24 01 050 A1 describes a warp knitting machine, in particular a Raschel machine, for producing warp knitted fabrics with long weft threads with a device for the endless insertion of several weft threads.
- a carriage places the weft threads in conveyor belts arranged on both sides, through which the weft threads are guided to the knitting tools.
- the devices known for the reinforcement or equipment are complex and require a lot of space.
- the object of the invention is to provide a device for presenting a thread over a section of a knitted fabric web, which is of compact construction and which allows a high working speed.
- the thread guide device has an eyelet structure, which can be driven in a planetary manner rotating about an axis of rotation, as a rotating element and a traversing disk designed as the thread guide, which is arranged in a thread running direction behind the perforated disk.
- the axis of rotation is parallel and distant to a longitudinal axis of an eye of the eye structure.
- This is designed, for example, as a circular disk which is supported and drivable on its outer circumference; alternatively, the eyelet is attached, for example, to a rotor of a torque motor or to a hollow shaft drive.
- the eyelet with a circular cross-section is embedded in an edge area of the perforated disk in such a way that its distance from the axis of rotation is as large as possible.
- the eyelet is intended for guiding a weft thread and is designed in such a way that a thread breakage is avoided during operation or abrasion or other wear on both the weft thread and the eyelet are minimized.
- the traversing disk is formed from an elongated sheet with an essentially rectangular cross section.
- the traversing disk has a continuous narrow elongated hole, the length and shape of which is matched to a width of a textile to be covered with the weft thread, that is to say a stroke range.
- the elongated hole therefore does not have to be straight, but can take any suitable line shape.
- the elongated hole converts the rotational movement of the weft thread generated by the perforated disc into a movement that is largely horizontal, that is necessary for laying on stitch-forming tools.
- the elongated hole like the eyelet, is designed such that thread breakage is avoided during operation or abrasion or other wear on both the weft thread and the elongated hole are minimized.
- the traversing disk is designed as a rod, with stops for the weft thread being formed at the ends of the lifting area.
- the rod is preferably rounded and / or coated at least in the area that is touched by the weft thread.
- a shape of the elongated hole or the rod is different for optimal control of the thread laying.
- the eyelet structure is arranged in a thread running direction at a predetermined distance in front of the traversing disk.
- the axis of rotation of the eyelet structure and a longitudinal axis of the elongated hole are arranged, for example, in a plane that is preferably horizontal.
- a plane of a circle described by the eyelet during operation and a plane of the traversing disk are perpendicular to the plane mentioned above.
- the thread guide device is designed to move the weft thread back and forth in two directions over tools of a textile machine that extend over a stroke area. It is very simple and inexpensive and requires little installation space.
- a very high working speed of the device can be set by a corresponding drive speed of the eyelet structure.
- the thread guide device with which a weft thread is moved back and forth can achieve speeds of, for example, 1500 meters per minute. This speed is for certain warp knitting machines, for example for many Raschel machines, sufficient to present the weft thread without additional storage device.
- This fast thread guide device offers new application possibilities, e.g. B. in the fields of the production of nets, reinforcing textiles, geotextiles or lace.
- the device has a feed device which is designed to feed the thread laid in one direction to the tools.
- the feed device is designed, for example, as a gripper extending along the tools.
- the device has a holding device with two holding elements which are arranged in the region of reversal points of the thread at a distance from the lifting region.
- Each holding element is designed to receive the thread laid in one direction by the thread guide device.
- the holding device is designed to feed the held thread to the tools.
- a feed device is provided in addition to the holding device.
- the eyelet structure is designed as a perforated disc. This is easy and inexpensive to manufacture with the drive and the bearing.
- the eye structure comprises a torque motor. Attachment and storage on a textile machine is particularly easy here.
- the thread is guided through the large hollow shaft so that there are no disruptive parts in the path of the thread.
- a length of the elongated hole is smaller than a diameter of a rotation circle described by an eyelet of the eyelet structure during operation. This reduces the laying speed at the turning points and thus makes turning easier.
- the elongated hole (10) is not straight. It is e.g. rectilinear over an area and has curved ends or it is wavy; the non-linear guidance can be planar or spatial. This affects the laying of the thread over time.
- a textile machine according to the invention with at least one row of stitch-forming tools has at least one device described above for a selection of neighboring tools.
- Textile machines with stitch-forming tools that are arranged in at least one row for example warp knitting machines, namely warp knitting machines, Raschel machines and crochet gallon machines, as well as sewing machines and flat knitting machines.
- a thread to be presented to the tools of a warp knitting machine or a sewing knitting machine or a knitting tool or a flat knitting machine is designed as a warp thread or as a weft thread.
- the thread for the stitch-forming tools is presented, the thread laid at least in one direction is placed in front of, behind or above the tools.
- the at least one device is advantageously slidably attached to the textile machine. On the one hand, this makes retrofitting for arranging the reinforcement at another point on the textile web very easy. On the other hand, a surface of the reinforcement can be automatically shifted while the textile machine is in operation with the assistance of a motorized shift and a corresponding control.
- FIG. 1 the principle of a warp knitted fabric with a weft thread
- FIG. 2 shows a perspective view of a device for placing a thread in a sequence of three positions of a perforated disk and a weft thread
- Figure 3 is a side view of a textile machine designed as a warp knitting machine with the device according to the invention.
- Figure 4 is an eyelet formed with a torque motor as a front view.
- a first exemplary embodiment relates to a textile machine which is designed as a warp knitting machine with a device for placing a weft thread in front of knitting tools arranged in a row.
- the knitting tools form the tools here and the weft thread the thread.
- FIG. 1 shows a section of a narrow band of a warp knitted fabric KG that can be produced by the warp knitting machine.
- the warp knitted fabric is made up of nine stitches forming warp threads 1 and one weft thread 2. Shown are two trimmed rows of stitches at the top and bottom as well as four complete rows of stitches with four weft reversal points 3.
- the weft thread 2 is guided through part of the stitches, namely through four stitches and forms a reinforcement here.
- the device for presenting the weft thread for the knitting tools has a thread guide device 4, which is shown in FIG. 2. It is designed to move the weft thread 2 back and forth in the area in front of the knitting tools, which extend over a stroke area B, in two directions HI, HR.
- the thread guide device 4 has an eyelet structure 5 and a traversing disk 6.
- the eyelet structure 5 and the traversing disk 6 are arranged in front of a row of the knitting tools, with needles, here latch needles 7, and knock-out boards 8 also being shown.
- the eyelet structure 5 and the traversing disk 6 are arranged in succession in the thread running direction FR of the weft thread in the order mentioned with a short distance of 5 mm to 500 mm.
- the eyelet structure 5 is here formed as a perforated disk 5 in a circular plan view and has a rotational axis, not shown, about which the perforated disk 5 can be rotated, centrally and at right angles to its base surface.
- the perforated disc 5 is mounted on rollers on its outer circumference; e.g. arranged three of the rollers, which are evenly spaced and one of which is drivable.
- a diameter of the perforated disc 5 is 3 mm to 500 mm and preferably 5 mm to 250 mm, e.g. 100 mm. It is made of rigid material such as Made of hard plastic or metal.
- An eyelet 9 with a circular cross-section is embedded in the perforated disc 5 parallel to the drive axis.
- the eyelet 9 is arranged in an edge region of the perforated disc 5, at a distance from the edge of e.g. 1.5 mm, and has an inner diameter of approximately 3 mm.
- walls of the eyelet 9 are covered with a suitable material such as e.g. Ceramic or hard metal coated.
- the traversing disk 6 is formed from a rectangular, flat or curved plate and is arranged behind the perforated disk 5 in the thread running direction FR.
- a continuous slot 10 is embedded in the main surfaces of the traversing disk 6. This extends parallel to a longitudinal side of the plate in a length L, which corresponds to the maximum twice the radial distance of the eyelet 9 to the center of the perforated disc 5 (or to a longitudinal axis of the drive axis).
- a height H of the elongated hole 10 is approximately 1 mm.
- the perforated disk 5 and the traversing disk 6 are aligned with respect to one another such that a longitudinal axis of the elongated hole 10 and that of the drive axis lie in a horizontal plane. Together they cause a horizontal back and forth movement H1, HR of the weft thread 2 as a template on the knitting tools.
- the warp threads 1 coming from above are used to form a next stitch above the tongue 7a of the tongue needle 7 guided around the switch needles 7.
- the warp threads 1 each form a stitch below the tongue 7a of the latch needle 7, into which a knitted section of the weft thread 2 (shown thickened) running from left to right in FIG. 2a is already accommodated.
- the weft thread 2 is at the right weft reversal point 3.
- FIG. 2b shows an intermediate position of the perforated disk 5 and the weft thread 2, which is laid by the thread guide 4a of the rotating element 4 in the direction of Hl in front of three latch needles 7.
- the warp thread 2 is laid in front of all associated latch needles 7, and the latch needles 7 are in a knock-off position; the warp thread 2 is at the weft reversal point 3.
- a second exemplary embodiment shown in FIG. 4 differs from the first in the following:
- the thread guide device 4 comprises a torque motor 17. This is designed as an inner rotor.
- the eyelet 9 is fastened to a rotor of the torque motor 17 designed as a hollow shaft by means of a holding plate.
- the weft thread 2 is guided through the rotor to the eyelet 9.
- FIG. 3 shows the warp knitting machine with the device for placing the weft thread 2 in front of the knitting tools.
- the warp knitting machine is e.g. an RL Raschel machine with a series of knitting tools, where RL means right-left stitch sequence.
- the thread guide device 4 is arranged in the thread running direction FR in front of the knitting tools 7.
- one of the latch needles 7, one of the knock-off boards 6, one of the perforated needles 11 and one of the warp threads 1 are shown.
- the warp threads 1 are guided through the perforated needles 11 to the latch needles 7.
- the weft thread 2 is guided by a bobbin 12 through the eyelet 9 of the eyelet structure 5 and the elongated hole 10 and is laid in front of the latch needle 7 below the tongues 7a.
- the warp knitting machine is indicated by a rear side wall 13 and a foundation 14.
- the warp knitting machine points to the Kettengewirks KG set up a pair of rollers 15 and a winding beam 16 in the withdrawal direction P.
- the warp knitting machine is designed as an RR Raschel machine with two rows of knitting tools.
- the warp knitting machine has a device for placing a weft thread for each of the two rows.
- the weft thread 2 moves the weft thread 2 back and forth in the area in front of the knitting tools of the warp knitting machine extending over the stroke width B in two directions Hl, HR.
- the eyelet structure 5 of the thread guide device 4 is driven, for example, clockwise.
- the weft thread 2 is alternately laid in one of the directions Hl, HR as a result of the guidance through the eyelet 9 of the eyelet structure 5 and is thus presented to an assigned part of the knitting tools.
- the back and forth movement Hl, HR of the thread for laying on the tools is generated by planetary rotation of the eyelet 5 as a rotary movement and converted by the traversing disk 6 into a linear movement.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018120364.0A DE102018120364A1 (de) | 2018-08-21 | 2018-08-21 | Vorrichtung und Verfahren zum Vorlegen eines Fadens |
PCT/EP2019/071902 WO2020038816A1 (de) | 2018-08-21 | 2019-08-15 | Vorrichtung und verfahren zum vorlegen eines fadens |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3841239A1 true EP3841239A1 (de) | 2021-06-30 |
EP3841239B1 EP3841239B1 (de) | 2023-05-10 |
Family
ID=67688764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19756155.8A Active EP3841239B1 (de) | 2018-08-21 | 2019-08-15 | Vorrichtung und verfahren zum vorlegen eines fadens |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3841239B1 (de) |
DE (1) | DE102018120364A1 (de) |
WO (1) | WO2020038816A1 (de) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1268305B (de) * | 1963-11-22 | 1968-05-16 | Heinrich Kalbskopf Fa | Kettenwirkmaschine, insbesondere Raschelmaschine, mit einer Langschusseinrichtung |
DE1912645A1 (de) * | 1968-07-11 | 1970-09-24 | Reiners Walter Dr Ing | Kettenwirkmaschine |
DE1920477A1 (de) * | 1968-07-11 | 1970-11-12 | Reiners Walter Dr Ing | Kettenwirkmaschine |
DE2035007A1 (de) * | 1970-07-15 | 1972-01-20 | W. Schlafhorst & Co, 4050 Mönchengladbach | Vorrichtung zum Bereitlegen von Schußfäden an Kettenwirkmaschinen |
US3824811A (en) * | 1973-06-29 | 1974-07-23 | Inst Textilmaschinen | Warp knitting machine |
DE2401050A1 (de) * | 1974-01-10 | 1975-07-17 | Liba Maschf | Kettenwirkmaschine, insbesondere raschelmaschine |
DE102004062143B4 (de) * | 2004-12-23 | 2006-11-16 | Sächsisches Textilforschungsinstitut e.V. | Vorrichtung für die Fadenzuführung zur Wirkstelle einer Multiaxial-Kettenwirkmaschine |
-
2018
- 2018-08-21 DE DE102018120364.0A patent/DE102018120364A1/de not_active Withdrawn
-
2019
- 2019-08-15 EP EP19756155.8A patent/EP3841239B1/de active Active
- 2019-08-15 WO PCT/EP2019/071902 patent/WO2020038816A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
EP3841239B1 (de) | 2023-05-10 |
WO2020038816A1 (de) | 2020-02-27 |
DE102018120364A1 (de) | 2020-02-27 |
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