MX2011010844A

MX2011010844A - Device for producing a fibre mat by weaving.

Info

Publication number: MX2011010844A
Application number: MX2011010844A
Authority: MX
Inventors: Hendrikus Bernardus Frenken; Jan Hendrik Nijenhuis; Johannes Hilbink
Original assignee: Ten Cate Systems B V
Priority date: 2009-04-17
Filing date: 2010-04-15
Publication date: 2012-01-27
Also published as: RU2011146644A; WO2010120174A3; WO2010120174A2; ZA201107598B; CN102439207B; BRPI1016211A2; JP2012524175A; NL1036870C2; KR20120008500A; AU2010237169A1; US20120125474A1; CN102439207A; EP2419555A2

Abstract

The invention relates to a device for producing a fibre mat by weaving, which fibre mat is built up of a substrate on which fibres are provided and which device is provided at least with means for forming a shed of warp yarns forming the substrate of the fibre mat, a lay as well as means disposed on one or both sides of the shed for inserting one or more weft yarns into the shed. The invention further relates to a fibre mat obtained by means of a device according to the invention.

Description

DEVICE TO PRODUCE A MAT OF FIBERS BY KNITTING DESCRIPTION OF THE INVENTION The invention relates to a device for producing a fiber mat by weaving, whose fiber mat is constructed of a substrate in which fibers are provided and in which a device is provided with at least one means for forming a draft or warp yarns forming the substrate of the fiber mat, an interlacing as well as means arranged on one or both sides of the draft to insert one or more weft yarns in the draft.

The invention also relates to a fiber mat obtained by using a device according to the invention.

The term "fiber mat" as used in the present application is understood to refer to all kinds of substrates in which natural or synthetic fibers are provided, whose fiber mats can be used for all kinds of applications, such as geotextile or , for example, as sports fields of artificial turf or as mats or 3D carpets so called.

Producing an artificial turf mat by means of a weaving technique is a production technique which has been developed in recent years in addition to known production techniques such as tufting or knitting. The weaving over the tufting is preferable, since the tufting process invariably takes place in a fixed pattern of rows or threads. By using a weaving technique, it is possible to obtain a semi-random pattern in the draft by means of the combs, which makes the fiber mat, for example, an artificial grass mat, looks better and gives a natural appearance.

In addition, weaving is a simpler technique than tufting. In the tufting, the substrate is first woven, and subsequently the fibers are tufted.

The object of the invention is to provide an improved technique for producing a fiber mat and for providing a device for producing a fiber mat using a weaving technique, which makes it possible, when using a processing step, to obtain a fabric that it comprises vertical, free synthetic fibers that have a semi-random, variable and adjustable hair height.

According to the invention, the device is characterized in that the device is provided with cutting means for cutting one or more weft threads completely in one or more places. In this way, it is already possible to create free vertical synthetic fibers in the fabric during the weaving stage, making it possible to obtain a mat of fibers having a variable, adjustable height of hair, which simulates, for example, a natural lino.

According to another embodiment, the device is characterized in that the cutting means is arranged downstream of the draft. This is possible to obtain already free vertical synthetic fibers during the weaving stage. In this way, an additional processing step of the fabric obtained after the weaving stage is unnecessary, which simplifies the operation and which speeds up the production process considerably.

According to a functional aspect of the invention, the device is characterized in that the cutting means comprises at least one blade element. More particularly, it is said that the cutting surface is at least one blade element that extends perpendicularly to the direction of insertion of the weft yarn. This aspect makes it possible to cut the weft yarn completely in the desired position during the weaving process so that free vertical synthetic fibers are obtained.

According to another functional aspect of the invention, the device is characterized in that at least one blade element is fixedly arranged, while in another embodiment at least one blade element is movably disposed. At least one blade element can drive a scissor movement.

In another embodiment of movement, at least one rotatable blade element is preferred, with the cutting means comprising more particularly at least one rotatably driven shaft provided with several separate blade elements. In this way, the weft yarns can be completely cut in an efficient and rapid manner during the weaving process so that vertical synthetic fibers are obtained.

In order to be able to set the height of the hair of the separated vertical synthetic fibers, the spacing between the blade elements according to the invention is adjustable.

According to the invention, in order to perform a reliable cut through the weft yarns in the desired positions, the device comprises support means for the weft yarns, which supports means cooperating with the cutting means.

More particularly, in a specific embodiment, the support means comprises at least one bar member, over which the weft threads that are completely cut can pass. The bar member may be provided with a recess which is capable of receiving at least part of the cutting element.

In order to perform an effective insertion of the weft yarns in the direction of the cutting means, the device according to a specific aspect of the invention is characterized by the support means comprising at least one wire-like support guide. It supports the weft threads, whose wire-like support is connected to the free end of a bar member with a first end to the device with the other end. The free end of the bar member can furthermore be a screw connected to the bar member, allowing easy mounting of the wire-like support guide.

In this way, only the weft threads to be completely cut are directed in the direction of the cutting means, while the weft threads that are not completely cut by the blade element in question can be guided along the cutting means in question without being cut.

In a functional mode, the device is characterized in that the wire-like support guide is connected to the device with its other end by means of a spring element. When considering that the wire-like support guide forms part of the moving draft, a weft thread can be completely cut by the respective corresponding cutting element which can thus be guided over the wire-like support guide device of the element. of blade.

In addition, the support means may be tiltable relative to the draft, which prevents the weft threads from jamming or undesirably entanglement in the free end of the bar member. This also increases the tension in the weft threads and also facilitates the cutting action of the weft threads through the cutting elements.

According to a functional aspect of the device according to the invention, the wire-like support guide is made of a plastic or a metal.

In two different functional modes, the cutting means can cut one or more weft threads completely in one or more places using ultrasound or heat.

The invention will now be explained in more detail in the description of the following figures, in which reference is made to a drawing, in which: BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows a first view of a device according to the invention; Figures 2-8 further show views of the device according to Figure 1; Figures 9, 10a-10b show examples of a tracing of a fiber mat obtained by means of the device according to the invention.

For a better understanding of the invention, similar parts will be indicated by identical numbers in the description of the following figures.

It should be noted that the fiber mat as described in the present patent application can be represented in various ways, for example, as a fiber mat for use in garden design (for example, to maintain dyke shields) or as fiber mats integrally having a sport function, such as an artificial turf mat for soccer fields or fields of hockey. A weaving device is provided with the means 10 that forms a warp for the warp yarns 20 that are fed into the shuttle from the back of the weaving device.

A fiber mat as described in the present application may comprise natural fibers as well as synthetic fibers.

The interlacing 10 works to keep the warp yarns slightly apart and also to weave weft yarns 21 alternately between the various weft yarns. The warp yarns 20 in this manner form the substrate of the fiber mat.

To insert the weft yarns 21, the insertion means 11 is disposed on one side of the weft, which insertion means unwinds the weft yarns 21 of a supply spool (not shown) and weaves them between the various warp yarns 20 in the draft 10 by means of a projectile alternating through the draft, for example, a clamp or by means of air or water.

A fiber mat consists of a substrate in which synthetic fibers are provided. The synthetic fibers have a certain height of hair and extend upwardly from the substrates so as to make the fiber mat look more similar to natural grass in those cases where the fiber mat is intended for use as a geotextile mat or a mat of artificial grass. Usually, a filler material, for example consisting of the above-mentioned and / or small particles of a synthetic material (e.g. rubber), is provided between the vertical fibers. During the weaving process, the weft yarns of the fiber mat, which eventually also form the vertical fibers in the final fiber mat, have been completely inserted between the warp yarns 20.

According to the invention, in order to make a fiber mat with vertical, free synthetic fibers, cutting means 30 are provided (see Figure 2), which cut the various weft yarns 21 completely in one or more places in draft 10.

As clearly shown in Figure 2 (and Figures 3-4-5), the cutting means 30 consists of a shaft 34, which is mounted to a frame 39 that forms part of the weaving device by means of the flanges 35. of support. The support shaft 34 can be rotatably driven by a driving unit 36 (for example, an electric motor) which rotatably drives the support shaft 34 by a gear 36a, a transmission carrier 37 and a gear 38. Also, they are possible , however, other ways of driving the shaft by means of a chain or other type of endless carrier.

According to the invention, cutting elements 33 are provided at a short distance apart from the support shaft 34, the cutting elements in this embodiment which are manifested as rotatably driven blades 33. The blade elements 33 can be driven rotatably by means of the support shaft 34, which is real, although they are also arranged fixedly relative to the frame 39 (and the weaving device 10). During the weaving process, the fiber mat (substrate of warp threads 20 with weft threads 21 inserted) thereby moves the fabrics from the set in the direction of the frame 39 and the cutting means 30.

The rotating cutting elements cut the weft yarns 21 completely in predetermined positions, so that the free vertical end can function as artificial turf fiber. The remainder of the weft yarn is thus still present in the substrate 20 as a woven part in the substrate, so that the artificial turf fiber can not undesirably detach from the substrate 20 without a force (eg, a pulling force). ) that is exercised.

It should be noted that the cutting means can also be realized in other embodiments, for example, in the form of rigidly disposed blade elements, without movement, along which the weft yarn is carried. In another embodiment, the blade elements can be configured as small scissors which are driven in a suitable manner.

The cutting means may also be oriented perpendicular to the direction of insertion in the weft yarn, as shown in the figures. An improved cutting action can be realized, however, if the cutting means are arranged at an angle to the direction of insertion of the weft yarn 21.

To achieve a correct cut of the yarns 21 to obtain synthetic fibers having a desired hair height, the weaving device according to the invention is provided with support means which cooperate with the various cutting elements 23. The support means are indicated at 23, being configured as bar members 32 which are rigidly connected to the frame 39.

The function of the bar members 32 is passive to be performed by the free ends 32a, which raises the weft threads that are completely cut and guide the weft threads on the bar member 32 in the direction of the elements 33 of cut. The weft threads 21 which are not completely cut are passed under the bar member 32 and thus are not completely cut by the corresponding cutting element 33, but remain unaffected, being woven between the warp yarns 20. In this way, adequate securing is ensured in the warp yarns 20 of the separate weft yarns that function as artificial turf fibers.

To achieve a seamless, practical cut of the weft yarns 21 by the cutting elements 33, each bar member 32 can be provided with a recess 32b capable of receiving at least part of the cutting surface 33a of each cutting element. .

Preferably, the free end 32a of each bar member 32 can be threaded onto the bar member 32 by means of a screw thread 32c. The free end 32 may be hollow and provided with an opening 32d, through which a wire-like support guide 31 extends (see Figures 2, 7 and 8), whose wire-like support guide is connected to the wire. free end of the bar member 32 with one end and the device with the other end.

As Figures 1, 2, 7 and 8 clearly demonstrate, the wire-like support guides 31 are guided through the set and the warp 10 to the side of the weaving device where the weft threads 21 are inserted into the device of weaving. The wire-like support guides 31 are alternated through the draft by means of the insertion means of the weaving device, so that, depending on the weaving action, the weft threads 21 are inserted in the draft above and below. Support guides similar to wire.

The support guides are preferably mounted in an inclined manner in the device, thus preventing the weft threads from jamming or undesirably entanglement in the free end thereof. The support beam 39 for this purpose is tiltable in relation to the draft. The support beam 39 can, for example, be connected to an eccentric transmission, the transmission of which can be conducted from the weaving device.

Since each wire-like support guide 31 is connected to a bar member 32, the weft yarns 21 inserted on the wire-like support guide 31 in question will be irrevocably carried out in the direction of the associated cutting member 33. that are cut completely.

The weft threads 21 that have been locally inserted under a wire-like support guide 31 in this manner will not be completely cut at the location of the wire-like support guide (and the bar member 32 and the blade member 33). , respectively).

As Figure 8 clearly demonstrates, the various wire-like support guides 31 are connected to a support beam 10a of the weaving device with its other end 31b, preferably by means of a spring element 40, so that the movements and efforts in the wire-like support guide 31, whose efforts can be developed during the weaving process, can be absorbed in a simple manner.

By tilting the support guides, as stated above, not only undesirable binding of the weft yarns is prevented. In combination with the spring elements 40, the inclination of the bars 32 immediately raises the wire-like support guides 31, whereby the weft yarns guided by these wires are raised to the bars increasing the tension in the weft yarns and thus facilitating the cutting action of the weft threads through the cutting elements.

Subsequently, the parameters of a fiber mat obtained by means of a device according to the invention will be described by way of example. Such a fiber mat is shown in Figure 9, in which the numbers in the rows of numbers in addition to the set (or warp) 10 refer to the weft yarns 20. The figure clearly demonstrates the artificial grass fibers 21a-21b obtained by completely cutting the weft threads 21 on the fiber mat locally, using the cutting means 30. The fiber mat (or fiber mat) has a surface density of 1265 g / m2, consisting of a 8300 DTEX yarn. The number of weft yarns per centimeter is 14.5, while the pile height of the synthetic fibers 21a-21b without cutting is approximately 60 mm.

In Figures 10a-10b, a different stroke of a fiber mat is described, with the reference X indicating the position where the weft yarn is completely cut by the cutting means 30 to obtain individual synthetic fibers.

The mat has been woven in accordance with the following construction: 20 flat weft yarns + 10 warp yarns fastened with at least one double knot in W. However, the weaving device can also be configured for weaving with 2-25 yarns of flat weft + 2-50 warp threads fastened with at least one double knot in W.

The fiber mats that can be produced by means of the device according to the invention are in particular suitable for use as a geotextile in garden decoration, although they can also be used for sports fields (soccer). Characteristic of such fiber mats is the fact that a two-dimensional weaving technique is used, by means of which a functional construction in 3D (artificial turf) is made.

Claims

1. A device for producing a fiber mat by weaving, the fiber mat of which is constructed from a substrate in which fibers are provided and in which a device is provided at least with means for forming a warp thread set-up forming the substrate of the fiber mat, an interlacing as well as means arranged on one or both sides of the cut to insert one or more weft threads in the cut, characterized in that the device is provided with cutting means for completely cutting one or more weft threads in one or more places.

2. The device according to claim 1, characterized in that the cutting means are disposed downstream of the draft.

3. The device according to claim 1 or 2, characterized in that the cutting means comprise at least one blade element.

Four·. The device according to one or more of claims 1-3, characterized in that the cutting surface of at least one blade element extends perpendicular to the direction of insertion of the weft yarn.

5. The device according to one or more of claims 1-4, characterized in that the cutting surface of at least one blade element extends at an angle in the direction of insertion of the weft yarn.

6. The device according to one or more of claims 1-5, characterized in that at least one blade element is fixedly arranged.

7. The device according to one or more of claims 1-5, characterized in that at least one blade element is movably arranged.

8. The device according to claim 7, characterized in that at least one blade element drives a scissor movement.

9. The device according to claim 7, characterized in that at least one blade element is rotatable.

10. The device according to claim 9, characterized in that the cutting means comprise at least one rotatably driven shaft provided with several spaced blade elements.

11. The device according to claim 10, characterized in that the spacing between the blade elements is adjustable.

12. The device according to one or more of the preceding claims, characterized in that the device comprises support means for the weft yarns, whose support means cooperate with the cutting means.

13. The device according to claim 12, characterized in that the support means comprise at least one bar member, on which the weft yarns that are completely cut can be passed.

14. The device according to claim 13, characterized in that the bar member is provided with a recess which is capable of receiving at least part of the cutting element.

15. The device according to claim 12, 13 or 14, characterized in that the support means comprises at least one wire-like support guide that maintains the weft yarns, whose wire-like support guide is connected to the free end of the wire. a bar member with a first end and the interlacing with the other end.

16. The device according to claim 15, characterized in that the free end of the bar member is a screw connected to the bar member.

17. The device according to claim 15 or 16, characterized in that the wire-like support guide is connected to the device with its other end by means of a spring element.

18. The device according to claims 12-17, characterized in that the support means are tiltable relative to the setting.

19. The device according to one or more of claims 15-18, characterized in that the wire-like support guide is made of a plastic material.

20. The device according to one or more of claims 15-18, characterized in that the wire-like support guide is made of a metal.

21. The device according to claim 1 or 2, characterized in that the cutting means cut one or more weft threads completely in one or more places using ultrasound.

22. The device according to claim 1 or 2, characterized in that the cutting means cut one or more weft threads completely in one or more places using heat.

23. The fiber mat characterized in that it is obtained by means of the device according to one or more of the preceding claims.