EP3356587A1 - Procede et dispositif pour la realisation d'une structure textile tricotee tubulaire - Google Patents
Procede et dispositif pour la realisation d'une structure textile tricotee tubulaireInfo
- Publication number
- EP3356587A1 EP3356587A1 EP16787488.2A EP16787488A EP3356587A1 EP 3356587 A1 EP3356587 A1 EP 3356587A1 EP 16787488 A EP16787488 A EP 16787488A EP 3356587 A1 EP3356587 A1 EP 3356587A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tubular
- textile structure
- weft
- knitted textile
- double needle
- 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
Links
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 present invention is in the field of the realization of tubular textile structures, made by knitting, using the so-called "pier stitch” technology. It also relates to a device implementing this method.
- This diameter is, in addition, determined by that of the trade.
- the change of diameter requires the choice of another machine, without allowing the realization of intermediate adjustments.
- tubular textile structures on mesh looms picked cellular or trades hooks.
- the diameter of the resulting tubular structure is controlled only in an approximate manner, and moreover, there is always a greater or lesser possibility of radial extension of said structure.
- the mechanical properties are still limited in this radial direction.
- the braiding technique imposes a choice of constituents of materials of the same nature, effectively limiting the possible combinations, and consequently, the applications likely to result from such tubular structures.
- the objective sought by the present invention is to allow the realization of such a tubular textile structure developing a controlled extensibility of its diameter, so in radial direction, and may further develop mechanical properties impossible to achieve with the techniques of the invention.
- the invention proposes a method for producing a tubular knitted textile structure which consists of:
- the method of the invention is to achieve a 3D structure through the implementation of a double needle knitting machine, typically a Rachel machine, implementing in known manner the so-called jetty mesh technology and then to continue by weaving the resulting 3D structure by means of a continuous frame, the continuity of the weft yarn making it possible in particular to effectively control the resistance and elongation properties of the tubular structure.
- the properties are thus directly identical or in any case very close to the characteristics of the weft yarn, the filling being almost zero.
- the method of the invention makes it possible to obtain a tubular structure whose mechanical properties are controlled in two directions.
- multitubular structure is meant the production of structures having not one but several tubes extending substantially parallel to one another. said tubes being capable of being detached from each other after their production.
- the joining of the two sheets can take place at their lateral edges, in order to eventually form a tubular structure. But this connection can also intervene in intermediate zone, so as to achieve a multi-tubular structure.
- This joining is carried out using son named in the field considered by "son of hair". These are the usual connecting threads distributed on one or more bars of a double needle job. These son pass alternately by the movement of the craft from one needle to another to create a textile having a thickness.
- the invention also relates to the device for producing such a tabular knitted structure according to the aforementioned method.
- This device comprises:
- the device according to the invention implements a rotary framer describing rotations around the double needle, in order to insert a helical weft thread on the 3D structure, continuously.
- the nature of the constituent wires of the 3D structure is identical or different from that of the weft yarn.
- the weft feed reel is mounted on a circular ring in the center of which is mounted the double needle bed, the circular ring being rotated by any means, such as that in particular gear with pinion gears on a toothing provided at the outer periphery of the ring gear.
- the weft feed reel is mounted on a carriage guided on guiding means surrounding the double needle bed, said carriage being moved on said guiding means by any means such as toothed belt or rack and pinions.
- the invention also relates to any tubular knitted textile structure obtained by means of the method and device according to the invention.
- Figure 1 is a schematic perspective representation illustrating a tubular knitted structure obtained by the method and the device of the invention.
- Figure 2 is a view similar to Figure 1, in which one can observe a variation in the diameter of the tubular structure.
- Figure 3a is a schematic representation in section of a tubular structure according to the invention, in this case provided with two lateral tongues.
- Figure 3b is a diagrammatic representation in section of a multi-tubular structure according to another embodiment of the invention.
- Figure 4 is a schematic representation seen from above of the principle of the method and the device of the invention.
- FIG. 5 is a schematic representation seen from above of a double needle bed with representation of the circular and continuous weft thread according to the method and the device of the invention.
- Figure 6 is a schematic perspective representation of a first embodiment of the device of the invention.
- Figure 7 is a schematic perspective representation of a second embodiment of the device of the invention.
- FIG. 1 therefore shows a knitted textile tubular structure 1 obtained by implementing the method and the device of the invention.
- this tubular structure results from a 3D structure 2 obtained by the technology knit throw on a loom Rachel double needle, made from bonding based on chains combined with sectional frames or bonding type simple knitting, double knitting or other , according to the desired texture and mechanical performance (strength, elongation), and in a known manner.
- the tubular structure also comprises a helical continuous weft 3, here represented in a constant pitch 4.
- a helical continuous weft 3 here represented in a constant pitch 4.
- Both the pitch and the inclination or obliquity of the helix of the frame can be programmed to vary along the textile structure depending on the intended applications.
- This continuous frame 3 makes it possible to limit or even to prohibit, depending on the nature of the wire which constitutes it, any extensibility of the structure in the radial direction, that is to say any expansion of the diameter of the tube. Moreover, and because of the technology used, namely the mesh technology double needle bed, it is also possible to vary the diameter of said structure along its length (that is to say in production direction) , typically from a few tenths of a millimeter to a few millimeters,
- the Rachel looms can be equipped with different gauges, that is to say, with a greater or lesser number of needles and knitting elements, allowing a great variability of adjustment of the performances, but also permeabilities by the rate of openings of the meshes.
- One of the essential elements of the invention resides in the continuous nature of the weft yarn, which is therefore inserted over the entire circumference of the 3D textile structure manufactured on the Rachel double needle type loom and thus making it possible to reinforce its mechanical strength because free from any interruption resulting from the cutting weft son observed in the technologies of the prior art.
- the variability of the diameter has been illustrated in FIG. 2, in which three distinct zones A, B and C, of respective programmable length, have been represented.
- the two areas A and C each have a constant diameter, but different, by acting on the binding and control of the wire rates of the 3D structure or the weft and their voltage.
- zone B Within the latter, the weft yarn is also present but can be programmed with a different "step" if necessary.
- FIG. 3a illustrates a tubular structure, provided with two lateral tongues 25, 26, resulting from the joining of the two textile faces obtained by the Rachel double needle needle loom. These tongues are likely to constitute reinforced areas suitable for fixing the tubular structure depending on the intended applications.
- FIG. 3b shows another variant, comprising in this case three tubular structures, separated from one another by two by a junction zone 27.
- the realization of such a structure rests on the same principle.
- the continuous weft yarn travels the entire circumference of the structure, both in the tubular areas themselves as junction areas and tongues.
- FIG. 4 shows the principle of the method of the invention. Basically and as already indicated, it is generated a 3D structure using a Rachel double needle job 5 (for which, for the sake of simplification of understanding, it has not shown son feed modules).
- the supply reel 7 of weft thread 3 is disposed in a plane s' registering perpendicularly to that receiving the double needle and passing at the level of the cooperation zone of the needles and sets of said needle beds.
- the rotational movement of the coil 7 around the two needle beds is obtained by any means, and in any event, by a mechanism synchronized with the cycle of formation of the meshes on the double needle bed.
- This coil 7 delivers the weft thread 3 after passing through a braking device 8, to ensure a correct tension of the weft yarn.
- This braking is done either directly on the weft thread or on the spool itself.
- Such braking systems are known in themselves. They can be in particular of mechanical, electrical, even electromagnetic nature.
- the programming of the pitch of the helix resulting from the insertion of this weft yarn can in particular be a direct consequence of the introduction sequences of the weft in question in the knitting program of the 3D background structure.
- the supply reel 7 in weft yarn 3 is mounted on a circular ring 15.
- This circular ring is thus mounted around the double needle bed 5. It is rotated by means of toothed pinions 16 whose axis of rotation 17 actuated by electric motors (not shown). These toothed gears 16 mesh with the toothed peripheral edge 18 of said ring gear 15.
- the management of the electric motor (s) actuating the toothed gears 16 is synchronized with the operating cycle of the double needle needle loom, so that to introduce the weft thread 3 at the appropriate time at each of the needle beds.
- the weft yarn 3 performs a revolution, and in the example described a rotation, around the needle beds in the area where the 3D textile structure is obtained obtained by the play of the knitting members mounted on needle beds, respectively needles 20 and pans 21.
- the pucks are themselves moved on support bars 22, according to the binding program son retained.
- the braking device 8 positioned at the output of the coil, for the purpose of regulating the tension of the weft yarn.
- the weft feed reel 7 is mounted on a carriage 25 guided according to a guide system, in this case, in the form of a racecourse, and typically consisting of rectilinear portions 26 and curvilinear portions 27, adapted to constitute a continuous path for said carriage 25, and corollary for the coil 7.
- the carriage 25 also provides revolutions around the double needle bed, as in the embodiment previously described.
- the carriage 25 is secured to a toothed belt or any other equivalent device, cooperating with a suitable roller (not shown), or any other means adapted to ensure its progression on the guide path 26, 27.
- This embodiment is particularly advantageous for the production of tubular textile structures of large width or large diameter, particularly allowing the use of linear motors or high-speed control by appropriate electronics.
- the invention also relates to the tubular textile structures obtained by the method and the device described above.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
- Woven Fabrics (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1559096A FR3041663B1 (fr) | 2015-09-28 | 2015-09-28 | Procede et dispositif pour la realisation d'une structure textile tricotee tubulaire |
PCT/FR2016/052433 WO2017055722A1 (fr) | 2015-09-28 | 2016-09-26 | Procede et dispositif pour la realisation d'une structure textile tricotee tubulaire |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3356587A1 true EP3356587A1 (fr) | 2018-08-08 |
Family
ID=54707980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16787488.2A Pending EP3356587A1 (fr) | 2015-09-28 | 2016-09-26 | Procede et dispositif pour la realisation d'une structure textile tricotee tubulaire |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3356587A1 (fr) |
FR (1) | FR3041663B1 (fr) |
WO (1) | WO2017055722A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11530501B1 (en) * | 2017-10-02 | 2022-12-20 | Apple Inc. | Tubular warp knit spacer fabric |
FR3071716B1 (fr) * | 2017-10-04 | 2023-02-24 | Mdb Texinov | Insert textile a finalite medicale et son procede de fabrication |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2560311A (en) * | 1951-07-10 | Mechanism for the manufacture of | ||
GB1183890A (en) * | 1967-12-20 | 1970-03-11 | Mayer Textilmaschf | Seamless Net Tube |
US4100770A (en) * | 1976-10-28 | 1978-07-18 | E. I. Du Pont De Nemours And Company | Process and nonraveling knit tubular products having axial stretch |
EP0450068A4 (en) * | 1989-10-13 | 1992-07-08 | Mitsubishi Rayon Co., Ltd. | Method and apparatus for producing hollow yarn film knitted article |
-
2015
- 2015-09-28 FR FR1559096A patent/FR3041663B1/fr not_active Expired - Fee Related
-
2016
- 2016-09-26 EP EP16787488.2A patent/EP3356587A1/fr active Pending
- 2016-09-26 WO PCT/FR2016/052433 patent/WO2017055722A1/fr unknown
Also Published As
Publication number | Publication date |
---|---|
FR3041663B1 (fr) | 2018-04-27 |
WO2017055722A1 (fr) | 2017-04-06 |
FR3041663A1 (fr) | 2017-03-31 |
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