Method and system for creating a non-woven fabric

Abstract

A method to generate a non-woven fabric includes prearranging at least one thread guide arranged to guide at least one textile thread, prearranging moving means for actuating the thread guide according to at least one degree of freedom, prearranging at least one rigid support and handling each thread guide by the moving means for arranging at least one first portion of each textile thread along at least one first trajectory _1 on each rigid support. Each thread guide is handled by the moving means for arranging at least one second portion of each textile thread along at least one second trajectory _2 on each rigid support. Each second trajectory _2 overlaps with each first trajectory _1 at least at one intersection point P_i, joining each second portion of each textile thread with each first portion of each textile thread at each intersection point P_i.

Claims

1. A method to generate a non-woven fabric comprising the steps of: prearranging at least one thread guide arranged to guide at least one textile thread; prearranging an actuator that is arranged to actuate said or each thread guide according to at least one degree of freedom; prearranging a first rigid support and a second rigid support; handling said or each thread guide by said actuator for arranging at least one first portion of said or each textile thread (110,110a,110b) along at least one first trajectory .sub.1 on said first rigid support; handling said or each thread guide by said actuator for arranging at least one second portion of said or each textile thread along at least one second trajectory .sub.2 on said first or second rigid support, said or each second trajectory .sub.2 arranged to overlap with said or each first trajectory .sub.1 at one or more intersection points P.sub.i; joining said or each second portion of said or each textile thread with said or each first portion of said or each textile thread at said or each intersection point P.sub.i; and overlapping said second rigid support on said first rigid support to provide said step of joining said or each second portion of said or each textile thread with said or each first portion of said or each textile thread at said or each intersection point P.sub.i, wherein: tensioning elements are arranged on said first rigid support in order to create tensioning points T.sub.i; said or each first trajectory .sub.1 is adapted to pass through said tensioning points T.sub.i to provide to said or each textile thread a predetermined tension between two consecutive tensioning points T.sub.i along said or each first trajectory .sub.1; tensioning elements are arranged on said second rigid support in order to create auxiliary tensioning points T.sub.i; and said or each second trajectory .sub.2 is adapted to pass through said auxiliary tensioning points T.sub.i to provide to said or each textile thread a predetermined tension between two consecutive auxiliary tensioning points T.sub.i along said or each second trajectory .sub.2.

2. The method to generate a non-woven fabric, according to claim 1, wherein said step of joining said or each second portion of said or each textile thread with said or each first portion of said or each textile thread at said or each intersection point P.sub.i is made by gluing.

3. The method to generate a non-woven fabric, according to claim 1, wherein also said or each second trajectory .sub.2 is adapted to pass through said tensioning points T.sub.i to provide to said or each textile thread a predetermined tension between two consecutive tensioning points T.sub.i along said or each second trajectory .sub.2.

4. The method to generate a non-woven fabric, according to claim 1, wherein said first rigid support is a curved rotating surface.

5. The method to generate a non-woven fabric, according to claim 4, wherein said second rigid support is a curved rotating surface.

6. The method to generate a non-woven fabric, according to claim 5, wherein said first rigid support and said second rigid support are adapted to rotate to provide a step of overlapping said second rigid support on said first rigid support.

7. The method to generate a non-woven fabric, according to claim 5, wherein said first rigid support and said second rigid support are adapted to rotate during said steps of handling said or each thread guide for arranging said or each textile thread along said or each first trajectory .sub.1 and along said or each second trajectory .sub.2.

8. The method to generate a non-woven fabric, according to claim 1, wherein said first rigid support and said second rigid support are adapted to rotate to provide said step of overlapping said second rigid support on said first rigid support.

9. The method to generate a non-woven fabric, according to claim 1, wherein said first rigid support and said second rigid support are adapted to rotate during said steps of handling said or each thread guide for arranging said or each textile thread along said or each first trajectory .sub.1 and along said or each second trajectory .sub.2.

10. The method to generate a non-woven fabric, according to claim 1, wherein said second rigid support is a curved rotating surface.

11. The method to generate a non-woven fabric, according to claim 10, wherein said first rigid support and said second rigid support are adapted to rotate to provide a step of overlapping said second rigid support on said first rigid support.

12. The method to generate a non-woven fabric, according to claim 10, wherein said first rigid support and said second rigid support are adapted to rotate during said steps of handling said or each thread guide for arranging said or each textile thread along said or each first trajectory .sub.1 and along said or each second trajectory .sub.2.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further characteristic and/or advantages of the present invention are more bright with the following description of an exemplary embodiment thereof, exemplifying but not limitative, with reference to the attached drawings in which:

(2) FIGS. 1A and 1B diagrammatically show the step of joining the textile threads of the method to generate a non-woven fabric, according to the present invention, showing the trajectories of the textile threads and the intersection point;

(3) FIG. 2 shows two portions of textile threads suitable for being arranged on trajectories .sub.1 and .sub.2 at intersection point P.sub.i according to a defined sequence;

(4) FIG. 3 shows graphically an exemplary implementation of the method wherein union is made by overlapping the two rigid supports;

(5) FIG. 4 shows graphically an exemplary implementation of the method where the tensioning points T.sub.i for arranging the portions of textile thread along the respective trajectories are made by means of tensioning elements integral to the rigid supports;

(6) FIG. 5 graphically shows an exemplary embodiment, variant of that of FIG. 4, wherein mobile tensioning elements are provided;

(7) FIG. 6 graphically shows an exemplary embodiment in which two rotating rigid supports are provided for continuous processing;

(8) FIG. 7 graphically shows the subsequent steps of an embodiment of the method wherein a three-dimensional rigid anthropomorphic support and a rotating rigid support are provided;

(9) FIG. 8 shows a variant of the method, according to the present invention, wherein the two rigid supports are not superimposed to carry out the step of joining the textile threads, but are placed adjacent to one another in order to allow the joining of non-woven fabrics created in parallel;

(10) FIG. 9 shows the step of joining several parts obtained by means of three three-dimensional rigid supports.

DESCRIPTION OF A PREFERRED EXEMPLARY EMBODIMENT

(11) With reference to FIGS. 1A, 1B, 2 and 3 in a first embodiment of the method to generate a non-woven fabric 10, according to the present invention, there is a first step of prearranging a plurality thread guides 100 that are moved to guide at least as many textile threads 110 to arrange themselves along first trajectories .sub.1 on a first rigid support 200, which in FIG. 1A is schematically represented by the dotted line below the thread guides 100. There is then a step of new handling of the thread guides 110 to arrange second portions of textile thread 110 along second trajectories .sub.2, in order to join the first portions and the second portions of textile threads 110 at the intersection point P.sub.i and to thus create the non-woven fabric. The union of one thread on the other gives tension to the threads.

(12) In particular, in the present embodiment of the method, the step of joining the textile threads is made by gluing and, before the joining step, there is a step of depositing a glue element on the intersection point P.sub.i on the portions of textile thread 110.

(13) In particular, with reference to FIG. 2, the textile threads 110 can already be provided with glue before being arranged along the trajectories .sub.1 and .sub.2, calculating the distance d.sub.i between the intersection point P.sub.i on the respective threads 110.

(14) In particular, the glue is arranged in such a way as to prevent it from escaping from the intersection point P.sub.i, so as to prevent the non-woven fabric from becoming adhesive at the end of the process.

(15) In particular, the glue element can be: a photo-hardening resin, subsequently exposed to UV rays; a two-component resin; a physically or chemically activatable resin; an adhesive film; a combining the previous.

(16) Alternatively, the textile threads can be treated previously, so that they can be joined by ultrasound.

(17) Alternatively, the joining step can be made by means of other systems such as, for example, sewing or needling.

(18) With reference to FIG. 3, in an embodiment of the method, the second portions of textile threads 110 are arranged on a second rigid support 200 and the step of joining the textile threads 110 is made by overlapping the rigid supports 200 and 200.

(19) In the exemplary embodiment of FIG. 4, on the two rigid supports 200 and 200 tensioning elements 220,220 are provided arranged to create, respectively, tensioning points T.sub.i along the trajectories .sub.1 and auxiliary tensioning points T.sub.i along the trajectories .sub.2 to provide to the textile threads 110 a predetermined tension between two consecutive tensioning points T.sub.i. The rigid supports 200 and 200 are then overlapped, in a similar manner to what has been said for FIG. 3.

(20) In particular, the tensioning elements 220,220 can be equipped with mobile parts, be totally or partially separable from the support or can be made, even partially, of elastic or soft materials (e.g. foam or rubber) to facilitate the overlapping and joining steps.

(21) In this embodiment, both the first rigid support 200 and the second rigid support 200 have a planar shape. Alternatively, only one of the two rigid supports 200,200 may have planar shape.

(22) In FIG. 5 a variant of the method is shown wherein the tensioning elements 220,220 can translate with respect to the supports 200 and 200 to suitably adjust the tension of the threads 110a,110b and to facilitate the arrangement of the textile thread along the trajectory, in addition to allow greater adaptation to the desired geometry for the textile product.

(23) In a first solution of the invention, as shown for example in an exemplary embodiment of FIG. 4, a first and a second portion of a single textile thread 110 are arranged on both the trajectories .sub.1 and .sub.2, so that the textile thread 110 is glued on itself to generate the non-woven fabric.

(24) Alternatively, as shown for example in the embodiment of FIG. 5, a first textile thread 110a can be arranged on the trajectory .sub.1, whereas at least one second textile thread 110b is arranged on at least one trajectory .sub.2, passing on the intersection point P.sub.i. In this solution, therefore, the textile thread 110 is cut after being placed along the trajectory .sub.1.

(25) In each embodiment of the present invention, can be a step of cutting the textile thread 110,110a,110b to separate it by the thread guide 100. Such step can be carried out both before and after the joining step, or only after this step.

(26) In general, the tensioning points T.sub.i and T.sub.i can be made, alternatively, or in combination: using glue or other removable adhesives on the rigid support; by means of tensioning elements integral with the rigid support; by means of tensioning elements movable with respect to the rigid support, so as to vary the working perimeter on the rigid supports and/or increase the tension of the thread; by means of a rigid support equipped with micro-holes that keep the thread in position by suction; by means of a rigid support equipped with an electrostatic charge which holds the thread in position by electrostatic force; by means of a rigid magnetically charged support and a magnetized thread.

(27) In particular, the rigid support can be equipped with parts made with elastic or rubbery materials, such as shown in FIG. 7, to facilitate the meeting of the threads in the overlapping and joining steps.

(28) In the variant embodiment of FIG. 6, two rotating rigid supports 200 and 200 are provided comprising tensioning elements 220,220 translatable with respect to each other, configured to create tensioning points T.sub.i and arranged along the trajectories .sub.1 and .sub.2. In this embodiment, the joining by gluing is carried out by overlapping the supports and can be carried out during the continuous arrangement of the textile threads 110 along the trajectories .sub.1 and .sub.2.

(29) With reference to FIG. 7, the first rigid support 200 can also be an anthropomorphic three-dimensional support that allows the non-woven fabric to be modelled in a three-dimensional way, obtaining the joining of the textile threads by means, for example, of a second rotating rigid support 200.

(30) In FIG. 8 an embodiment of the method is shown, according to the present invention, wherein the two rigid supports 200 and 200 are not superimposed to carry out the step of joining the textile threads 110, but are used in parallel to provide different portions of non-woven fabric 10a and 10b and join them subsequently.

(31) In this embodiment, therefore, the joining the textile threads 110 is made separately on each rigid support 200,200, for example by gluing.

(32) In particular, with reference to FIG. 9, the rigid supports 200 and 200 can be anatomically shaped three-dimensional supports that allow the various parts of an item of clothing to be created.

(33) The foregoing description some exemplary specific embodiments will so fully reveal the invention according to the conceptual point of view, so that others, by applying current knowledge, will be able to modify and/or adapt in various applications the specific exemplary embodiments without further research and without parting from the invention, and, accordingly, it is meant that such adaptations and modifications will have to be considered as equivalent to the specific embodiments. The means and the materials to realise the different functions described herein could have a different nature without, for this reason, departing from the field of the invention. it is to be understood that the phraseology or terminology that is employed herein is for the purpose of description and not of limitation.