Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B39/00—Knitting processes, apparatus or machines not otherwise provided for
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/02—Pile fabrics or articles having similar surface features
  • D04B1/025—Pile fabrics or articles having similar surface features incorporating loose fibres, e.g. high-pile fabrics or artificial fur

Definitions

• the present • invention relates to an improved process for manufacturing textile products mesh directly from fibers and filaments.
• the present invention also relates to a device allowing the implementation of the method and extends to the mesh products resulting from said method and / or obtained by said device.
• the present invention also relates to products of the mesh type with fine mesh and / or in the form of velvet.
• the conventional methods for obtaining velvet are either carried out by the use of an additional thread, or by the use of a ribbon of card.
• an additional thread or by the use of a ribbon of card.
• two types of son which are 'picked simultaneously by the same needle.
• the first thread will constitute a normal jersey by passing directly from one needle to the other, while the second will have to loop before meeting the next needle by passing over a special plate (pouting element).
• the first thread ensures the flat cohesion of the product, the second constitutes rows of loops which once clipped will constitute the velvet.
• This product is made in the following way: the needles, before gripping the thread which will make a classic jersey, come "to type” in the flexible lining of a mini carding drum on which is the veil (from a ribbon ) and lead to a "tuft" of fibers (fibers that are not captured will be sucked up and possibly recycled). This tuft is anchored in the structure of the jersey as if it were a thread. This fake fur is then clipped to generate the velvet. As the length of the fibers in a tuft is random, the losses due to the shearing are important, much more than in the case of velvet generated by loops.
• the present invention relates essentially to the production of products obtained by the technique called "verticalization technique” developed by the Applicant.
• the verticalization technique described consists in subjecting the fibers and / or the filaments to "transverse looping" accompanied by a “stretching” and in obtaining an accumulation of fibers and / or filaments in the form of a "pseudo-thread" in which the fibers and / or filaments are parallelized.
• transverse looping accompanied by stretching is carried out for each individual fiber or filament using rotary sulking fingers or discs, spaced and arranged on a transverse axis relative to the advance of the veil and between which are placed sulky fingers.
• each fiber or filament is in principle involved in at least one looping so as to constitute a twist-free pseudo-thread obtained by the accumulation of the various fibers and / or elementary filaments well parallelized.
• This twist-free pseudo-thread constituted by the fibers and / or filaments parallelized can either be handled by needles of the tufting needles type and be led towards a substrate in order to produce carpets as described in detail in the publication EP-A- 0479880, either be driven by meshing needles in order to produce mesh products as described in detail in publication EP-A-0783608, or else be used for the production of coated-bonded products as described in detail in the publication EP-A-0960227.
• Document O96 / 10667 (downstream verticalization) describes how to produce mesh products falling into the category of knitted fabrics knitted directly from fibers in the form of an oriented veil.
• a set of discs provided at their periphery with a network of fine teeth interpenetrating a set of sulky fingers cooperate to drive and condense the web against a set of picking and transfer means to create a "pseudo-wire" in wavy form.
• These picking and transfer means consist of plates which are each presented individually in line with the sulking fingers.
• a pseudo-wire is therefore constituted by a certain "slice" of condensed veil whose length in the direction of advance is called "accumulation length". If:
• the length of accumulation will be all the more important as the weight of the veil is low.
• Some fibers, being "on horseback" on two consecutive wafers will therefore participate in two successive son and two rows of successive stitches; such fibers are called: interfering fibers.
• the percentage of these fibers varies according to the following parameters: the length of the fibers, the average angle of orientation of the fibers in the web, and the length of accumulation (therefore the weight of the web).
• the present invention aims to provide a method and a device based essentially on the technique of "verticalization” which allow the production of mesh products and in particular of mesh products with fine mesh or even very fine mesh, that is to say made with a device having a gauge less than 1/18 of an inch, that is to say less than 1, 4 mm.
• the present invention also aims to provide a method and a device for making velvet, possibly very short, or even products of the "suede” type.
• the present invention further aims to allow the production of products as described above by a method which has a clearly improved yield compared to those of the prior art.
• the present invention relates to a process for the production of knitted textile products from fibers and / or filaments flowing in the form of a veil, in which:
• the fibers and / or filaments are subjected to transverse looping accompanied by stretching using an assembly formed by the interpenetration of a set of identical spaced discs spaced apart and situated on a common transverse axis with a clearance identical sulking elements, the sulking discs having relatively spaced teeth on their perimeter,
• the fibers and / or filaments are accumulated in the form of at least one corrugated pseudo-wire of a certain length in which the fibers and / or filaments are parallelized, - the pseudo-wire is transferred over its entire length, and simultaneously directly into the eye of a set of gill needles, - A new row of stitches is conventionally carried out using the pseudo-yarn transferred into the eye of the needles.
• the mesh needles simultaneously perform the same movement to receive the pseudo-yarn obtained by accumulation of fibers and / or filaments.
• the passage of the pseudo-thread thus created towards the open eye of the gill needles takes place when they are in the top dead center position.
• the accumulation of said fibers and / or filaments takes place against the slope of the teeth preceding the set of sulky discs facing the arrival of a veil.
• This accumulation can also be favored by the presence of a set of shutter means which prevent the fibers and / or filaments from continuing their path with the disc.
• Each shutter means is placed in the extension of a pouting element, such as the pouting finger.
• a shutter means can be either a bent strip of width corresponding for example to the thickness of the discs, or of the order of -0.1mm and thickness between 0.2 and 2mm , held at its opposite end on a fixed and spring-loaded support, ie a strip of various shape on a mobile support, the control of which will determine the percentage of interfering fibers.
• this command allows to act on the time of presence of such shutter means and on their more or less close arrangement of the bou eurs elements will generate as appropriate an adequate percentage of fibers which will serve as interfering fibers.
• these shutter means can be arranged with a command more or less to immediate proximity of the top dead center of the gill needles, which will directly act on the percentage of fibers used as interfering fibers.
• this accumulation of said fibers and / or filaments can even take place in the absence of any shutter means and will therefore be carried out over a distance between two successive teeth, in order to create of the overmaterial on the back of the product constituted by interfering fibers.
• the rotational speed of looping discs is synchronized with those of the stitching needles, so that through a differential, the discs advance an X th turn for movement of the needles, X being the number of teeth.
• Another object of the present invention lies in the device for the manufacture of meshed textile products from fibers and / or filaments flowing in the form of a veil, characterized in that it comprises a set of loosening discs identical rotary spaced apart and located on a common transverse axis, in interpenetration with a set of identical sulking elements, such as sulking fingers, the sulking discs having relatively spaced teeth on their periphery.
• relatively spaced teeth means the presence of an integer number of regularly spaced teeth on the periphery of the sulking discs, the distance between two successive teeth being at least three times the height of said teeth.
• the device also includes a set of meshing needles which are arranged between the rotary sulking discs and in the extension of the sulking elements such as the sulking fingers.
• shutter means are arranged in the extension of the sulking elements such as the sulking fingers.
• the present invention also relates to a mesh textile product having a fine mesh.
• the mesh products are defined by the gauge of the device which allows the production of said mesh product.
• fine mesh is understood to mean devices making it possible to produce such products with a gauge of less than 1/18 of an inch, that is to say less than 1.4 mm. It should be noted that the mesh product will have meshes corresponding to the gauge to the nearest 10%.
• these products have a network of interfering fibers and / or filaments extending in both directions.
• the present invention also relates to a knitted textile product having a network of interfering fibers and / or filaments extending in both directions relative to the direction of advance and having a rate of interfering fibers and / or filaments greater than 10%, and preferably greater than 30%.
• the present invention relates to a mesh textile product in velvet form and the rate of fibers and / or interfering filaments is greater than 30%, and preferably greater than 60%. Description of the figures
• Figure 1 describes a sectional view of the device according to the present invention intended for the implementation of the method.
• Figures 2a to 2 h describe the complete cycle allowing the production of a mesh product according to a first preferred embodiment and constituting a mesh product with fine meshes.
• Figures 3a to 3h describe the complete cycle allows the production of a mesh product according to a second preferred embodiment of the invention and which may constitute a velvet product.
• FIG. 1 shows the positioning of the various members intended to produce a device according to the present invention. It is observed that a single set of identical disks arranged regularly on an axis and in interpenetration with a set of pouting fingers will allow both the formation of the pseudo-wire by accumulation and the transfer thereof into the eye of the gill needles. It is observed that the device resides essentially in the interpenetration of a set of identical looper discs 10, 11, 12, ... and located on a common transverse axis 01 with a set of loosening fingers. 20, 21, 22, ... in the extension of which are arranged gill needles 30, 31, 32.
• the various sulking discs 10, 11, 12 regularly have teeth 101 on their periphery
• the mesh needles 30, 31, 32 perform a back and forth movement between the folding plates 40, 41, 42.
• the rotational speed of the sulking discs is a uniform speed and is synchronized with that of the gill needles 30, 31, 32, so that by means of a differential, the discs advance by an ee of turn for a movement of the hands, X being the number of teeth.
• the needles penetrate between the discs by lifting the shutter means. From this moment the needles will take over from the shutter means with regard to the accumulation of the fibers, therefore the constitution of the pseudo-thread (the fibers are found parallel thanks to the orientation of the veil).
• Figure 2b The needles have reached their top dead center. The fibers continue to accumulate. • The tooth goes begin to push the pseudo-thread in the form of a loop to pass it behind the needles.
• the needles have started their descent and leave the discs. From this moment, the fibers which will continue to be delivered by the discs will accumulate against the shutter means. A small amount of fibers will nevertheless stretch between the tips of the sulking fingers and the eye of the needles; these are interfering fibers.
• Figure 2d The needles have reached their bottom dead center. They “knock down” the pseudo-wire between the slaughtering plates in the rear position, thus forming a mesh.
• the shutter means are “blocked” in their low position and thus continue to stop the fibers always delivered by the discs.
• the needles are always in bottom dead center.
• the plates advance to push the previous stitches and thus prevent the needles from penetrating them again when going up.
• the needles have started to rise.
• the plates always in the advanced position, prevent the knitting from going up with the needles.
• the needles are about to raise the obturating means which have accumulated a large part of the fibers constituting the pseudo-thread which will be used to form the next row of stitches.
• the interfering fibers form a loop on the back of the product.
• the needles have reached their bottom dead center. They "knock down" the pseudo-wire between the plates slaughter in rear position thus forming a mesh. They brought with it the interfering fibers along the length corresponding approximately to their course and the height of the desired loop. These interfering fibers were not removed from the veil since the discs just continued to rotate to deliver exactly this quantity. The needles were therefore not subjected to any effort.
• Figure 3d The needles are still in bottom dead center. The plate advances to push the previous stitches and thus prevent the needles from penetrating them again when going up.
• Figure 3e The needles have started to rise. The plates, always in the advanced position, prevent the knitting from going up with the needles. The discs have delivered a certain length of sail which passes behind the axis of the needle.
• Figure 3f
• a first advantage is its simplicity of implementation, since the production of the loops therefore of the velvet is carried out without the use of specific additional elements (such looping plate) unlike conventional processes based on threads.
• a second advantage is that this process is very reliable and very safe to operate, since the needles do not undergo significant effort or to constitute the basic jersey used for the flat cohesion of the knitted fabric, nor for the constitution of the loops, unlike the non-woven processes for generating velvet such as needling.
• the production of the velvet is not made more complex, however, even in the case of very fine gauges ( ⁇ lmm).
• the process will therefore allow easy production of very short pile (for very light weight items) or even products of the "suede” type.
• Another advantage of this process is that the manufacturing cost of the products is considerably reduced, since the spinning operation will no longer be necessary for the manufacture of article in velor, fleece or fleece knits.
• the production speeds of the looms deriving from the process can be very high, which improves the manufacturing yield.
• fibers which are difficult to spin or whose spinning cost is particularly high such as certain natural fibers or micro fibers.
• the production line is compact allows easy production of all kinds of fiber mixes, this is upstream of the card, or by superimposing card sails in order to guarantee comfort or cost. optimal or for aesthetic purposes.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Knitting Of Fabric (AREA)
• Nonwoven Fabrics (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Priority Applications (1)

Applications Claiming Priority (6)

Publications (1)

Family

ID=26077530

Family Applications (1)

Country Status (6)

Family Cites Families (9)

• 2002
  • 2002-07-16 EP EP20020758351 patent/EP1407068A2/de not_active Withdrawn
  • 2002-07-16 YU YU4704A patent/YU4704A/sh unknown
  • 2002-07-16 PL PL02367463A patent/PL367463A1/xx unknown
  • 2002-07-16 HU HU0401094A patent/HUP0401094A2/hu unknown
  • 2002-07-16 WO PCT/EP2002/007949 patent/WO2003008686A2/fr not_active Ceased
  • 2002-07-16 US US10/483,208 patent/US6918164B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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