Classifications

• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
  • D02G3/16—Yarns or threads made from mineral substances
  • D02G3/18—Yarns or threads made from mineral substances from glass or the like
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
  • D02G3/38—Threads in which fibres, filaments, or yarns are wound with other yarns or filaments, e.g. wrap yarns, i.e. strands of filaments or staple fibres are wrapped by a helically wound binder yarn
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
  • D02G3/16—Yarns or threads made from mineral substances
  • D02G3/18—Yarns or threads made from mineral substances from glass or the like
  • D02G3/182—Yarns or threads made from mineral substances from glass or the like the glass being present only in part of the structure
  • D02G3/187—Yarns or threads made from mineral substances from glass or the like the glass being present only in part of the structure in the sheath

Definitions

• the invention relates to obtaining a winding of a glass wick, consisting in particular of glass filaments coming directly from a die.
• This sector can be supplied either with balls or pieces of glass of other forms (fiber-drawing process by reflow), or in molten glass coming from an oven (fiber-drawing process by direct melting).
• the glass may be glass E, glass C, or any other composition capable of being fiberized.
• EP 0 928 840 consists of a drawing cylinder, situated substantially vertically above the die and around which the glass filaments falling from the die are wound in the form of a ply, in a spinning assembly transforming the ply of filaments into a wick, and in a winder for winding the wick.
• the spinning assembly comprises a doctor blade, or tool intended for scraping, pivoting, able to come into abutment against the surface of the cylinder to detach the filaments from said cylinder after a rotation of about 270 °, and an oblong element of parallel conical shape.
• the core wire is made of plastic and used to provide a composite wick more resistant to traction than a wick composed entirely of glass.
• a pre-spinning assembly which is arranged upstream of the spinning assembly, at substantially 180 ° relative to the arrival of the filaments on the drawing cylinder.
• the location of the pre-spinning assembly is thus considered at the rear of the cylinder, the front being defined by the place where the filaments are deposited on the cylinder.
• upstream and downstream are defined with respect to the direction of travel of the filaments on the cylinder from the die.
• the pre-spinning assembly is essentially put into operation at the start of the drawing of the filaments during the speed increase of the cylinder.
• the arrival of the filaments up to the spinning assembly is short-circuited, thus avoiding obtaining a winding which at its beginning would have a wick with a title not conforming to that provided for by the standards.
• the pre-spinning assembly is provided with a pivoting doctor blade able to come into abutment on the drawing cylinder and with a drum provided with an internal spindle for winding the filaments.
• the pre-spinning scraper takes off the layer of filaments, before therefore arriving on the spinning scraper, the filaments being wound around the spindle of the pre-spinning drum.
• the pre-spinning doctor is removed from the drawing cylinder when the speed of the cylinder has reached a speed establishing the desired diameter of the filaments.
• the operator In order to avoid excessive accumulation of filaments around the spindle of the pre-spinning drum, the operator must extract them from the rear of the cylinder; however, it should be able to simultaneously monitor at the front of the cylinder any occasional breakage of the filaments delivered by the die, which would justify immediate intervention.
• two operators are in fact necessary, an operator who is requested to be present at the rear of the stretching cylinder in order to assist in the manual extraction of the pre-spinning drum, while the other is at the front to ensure the drawing of the filaments.
• the existing device proves to be too bulky to allow integration of several of them arranged side by side in a direct melting installation.
• the object of the invention is to obviate these drawbacks by providing a device for winding a glass wire, the operation of which results in reduced labor and high productivity.
• Another object of the invention is to reduce the size of the spinning device, making it possible to insert one or more devices in an installation of fiber-drawing by direct fusion, the dimensions of which are imposed by various technical and economic constraints.
• the device for obtaining the winding of at least one wick of glass filaments on a winder from a multitude of filaments comprising
• a spinning assembly which comprises on the one hand, a retractable spinning blade capable of coming into abutment against the surface of the cylinder so as to peel off the filaments and provided with a sliding surface, and on the other hand, an element receiving filaments peeled off by the doctor blade;
• a pre-spinning assembly for the filaments intended to be discarded, the pre-spinning assembly being provided with a pre-spinning drum and a pre-spinning scraper capable of lifting the filaments from the cylinder drawing so that they are projected into said drum, is characterized in that the pre-spinning assembly is arranged downstream of the spinning assembly, and near the arrival of the filaments on the cylinder.
• the pre-wiring assembly is thus located at the front of the cylinder, a single operator is sufficient to manage and control the operation of the device.
• This arrangement at the front of the drawing cylinder also has the advantage of having to have and manage only one glass waste well which receives both the breakage filaments of the die and the flock formed. around the spindle of the pre-spinning drum.
• the receiving element of the spinning assembly comprises a bottom abutted to the sliding surface of the doctor blade, a rear wall with cylindrical concavity of longitudinal axis parallel to the axis of rotation of the cylinder and an opening longitudinal façade.
• the receiving element is integral with the spinning blade and is arranged so that its bottom and the sliding surface of the blade are coplanar, the displacement of the blade against the surface of the cylinder being effected by the pivoting of the wiring set.
• the bottom of the receiving element and the sliding surface of the doctor blade are embossed to help the filaments slide.
• the guide means in the receiving element of the spinning assembly are provided to cross from one side to the other said receiving element along a diagonal line going from a lower end before the longitudinal opening to an upper lateral point of the receiving element.
• the guide means rather consist of a pulling wire, which can be made of glass or of thermoplastic material for example. This pulling wire can either be cut after the restart, or kept inside the wick, constituting in the latter case a core wire for the wick which it increases the tensile strength.
• a Venturi tube capable of sucking the pulling wire is arranged so as to project it into the receiving element of the spinning assembly.
• a guillotine is associated with the outlet of the Venturi tube to cut the pulling wire after the beginning of the winding of the wick.
• a rotating annular device is provided at the outlet of the receiving element of the spinning assembly in the direction of the winder in order to round the wick. Just downstream of this annular device, an air injection nozzle is placed in front of which the wick passes to complete its smoothing.
• Sizing means are provided respectively disposed upstream of the deposition of the filaments on the cylinder and upstream of the spinning assembly to respectively coat the surface of the cylinder before the deposition of the filaments and the filaments before their detachment from the cylinder, which ensures the sizing of the filaments over their entire outer periphery.
• the device may include at least two spinning assemblies arranged upstream of the pre-spinning device and capable of operating together or separately.
• Each spinning assembly in this case comprises a spinning blade whose width of the blade corresponds to a partial width of the cylinder and complementary to the width of the other blade so as to separate and unstick in two parts the sheet of filaments.
• FIG. 1 schematically illustrates a sectional and side view of a device of the prior art
• FIG. 2 is a top view of Figure 1;
• FIG. 3 schematically illustrates a sectional and side view of a device according to the invention;
• Figure 4 is a top view of Figure 3;
• FIG. 5 is an enlarged view of the spinning assembly of Figure 3;
• - Figure 6 shows a perspective view of the spinning assembly of the device;
• FIG. 7 schematically illustrates a sectional side view of a variant of the device of the invention.
• Figure 8 is a top view of Figure 7.
• Figures 1 and 2 is illustrated the device of the prior art, it allows the drawing of glass filaments 10 from a die 11 and their winding on a winder 12.
• This device comprises a thread puller 13 which makes it possible to pre-stretch the filaments when they fall from the die 11, a rotary stretching cylinder 20 around which the filaments 10 brought from the thread puller are wound in the form of a sheet. pressed against the surface 21 of the cylinder, substantially over its entire width and along a deposition line L, a spinning assembly 30 comprising on the one hand, a retractable spinning scraper 31, disposed substantially at 270 ° from the line of deposit L of the filaments and serving to detach the filaments when it abuts against the surface 21 of the cylinder, and on the other hand, a receiving element 32 for the detached filaments which is conical in shape, as well as a wire core 40 passing through the receiving element 32 and around which the filaments 10 are twisted, the core wire surrounded by the filaments being wound on the winder 12.
• the device of the prior art also comprises a pre-spinning assembly 50 consisting of a rotary pre-spinning drum 51, and a pre-spinning doctor blade 52 capable of being moved or pivoted between a rest position and a position of operation for which the doctor blade is pressed against the surface 21 of the cylinder at the start of the drawing of the filaments or during a resumption of the drawing of the filaments after a break of the latter.
• the rotary drum 51 comprises an internal spindle 53 around which the filaments projected into the drum are wound via the doctor blade 52.
• a sizing system 60 for the filaments is provided downstream of the pre-spinning assembly 50 and upstream of the spinning assembly 30, this system having a back and forth translation movement -Comes parallel to the axis of rotation of the cylinder 20 so as to spray the entire web of filaments rotating on the cylinder.
• the device of the prior art operates as follows: the core wire 40 coming from a coil of wire not shown in FIGS. 1 and 2 is drawn up to the winder 12 by passing through the receiving element 32 of the spinning assembly from one end to the other, parallel to the axis of rotation and centrally, while the filaments 10 falling from the die 11 are brought manually against the surface 21 of the cylinder to be pressed there.
• the filaments are wound around the rotating cylinder 20 and the pre-spinning assembly 50 is made operational at the start of the drawing of the filaments, that is to say at the start of the rotation of the cylinder.
• the sheet of filaments is peeled off by means of the doctor blade 52, the filaments being projected into the drum 51 by the centrifugal force which has been transmitted to them during their rotation around the cylinder 20. They are then received around the internal pin 53 to the drum 52 and quickly form flock, which is pulled manually by an operator, for example by means of a thread puller, to avoid excessive accumulation in the drum 51.
• the doctor blade 52 of the pre-assembly Spinning 50 is raised to the rest position so that the layer of filaments continues to rotate until the spinning blade 31.
• the pivoting spinning blade 31 has been brought into the lowered position so that its blade rests on the surface 21 of the cylinder so that the filaments detach from the surface 21 and pass over the sliding surface 33 of the doctor blade, this sliding surface being inclined in the direction of the receiving element 32 towards which the filaments are guided, the projection of the filaments being favored by the centrifugal force which was transmitted to them during their rotation on the cylinder.
• the receiving element 32 has a return wall 34 able to return the filaments on the core wire 40 passing right through and longitudinally said receiving element. The filaments winding around the core wire then constitute a wick M which is pulled up to the winder 12 to be wound there.
• FIGS 3 to 6 illustrate the device of the invention, the elements common to the device of the prior art are identified by identical references.
• the device of the invention provided with its stretching cylinder 20 likewise comprises a spinning assembly 30 and pre-spinning assembly 50, as well as means 40 for guiding the ply of the spinning assembly to the winder , which consist of a pulling wire.
• the pre-spinning assembly 50 has been disposed downstream of the spinning assembly 30, and preferably beyond 270 ° of the deposition line L so that the filaments, thus initiating the lowering of the cylinder, are more easily caught by the pre-spinning doctor 52.
• This new arrangement specific to the invention makes it possible to solicit only one operator, since the latter can remain positioned at the front of the cylinder 20 so as to pull on the flock wound around the spindle 53 of the assembly of pre-spinning 50 when the device is started while monitoring the drawing of the filaments from the die 11 so as to be able to intervene immediately in the event of breakage of the filaments.
• the flock is also wound much more easily because the filaments are drawn in the downward direction of the cylinder.
• a common waste well 14 is sufficient to collect the flock and the glass in the event of breakage.
• the location of the pre-spinning assembly of the prior art upstream of the spinning assembly had the disadvantage that when raising the pre-spinning scraper to allow the web to reach the spinning blade, the risk that the blade of the pre-spinning blade caught some filaments existed, damaging the layer of filaments arriving towards the spinning assembly.
• the spinning assembly 30 comprising the doctor blade 31 and the receiving element 32 differs from that of the prior art in that the receiving element 32 does not have a conical shape.
• the conical shape of the prior art towards the exit of the core wire in the direction of the winder makes it possible to channel the air in circulation to facilitate the winding of the filaments around the core wire and promotes the guiding of the wire surrounded by the filaments .
• the invention achieves this goal differently.
• the wiring assembly visible in FIGS. 5 and 6 comprises a bottom 36 of width equivalent to that of the cylinder 20, side walls 35 and a longitudinal rear wall 34 of cylindrical shape which delimit a longitudinal front opening 37, the rear wall 34 having a function identical to the return wall of the prior art.
• the bottom 36 is inclined according to the slope of the sliding surface 33 of the spinning doctor blade.
• the doctor blade 31 is integral with said bottom 36 in order to ensure perfect continuity of sliding surface for the filaments; and moreover, this joining has the advantage of only rotating one piece.
• the bottom 36 as the surface 33 of the doctor blade are advantageously embossed.
• the cylindrical shape of the rear wall 34 generates a concavity which constitutes a return surface of the circulating air to facilitate the winding of the filaments projected around the tractor wire 40.
• the side wall 35 located on the side of the winder 12 is provided with an orifice 38 allowing the exit of the tractor wire surrounded by the filaments towards the winder, the tractor wire 40 being unwound from a reel 41, and passing through the receiving element 32 along a diagonal which starts from the lower lateral end 39 of the opening 37 situated opposite the side wall 35 provided with the orifice 38 and which opens at the orifice 38.
• the pulling wire 40 can advantageously be brought to the end 39 through a Venturi tube 42 ensuring the suction and projection of the wire to be collected manually at the orifice 38 by a brush not shown.
• the diagonal path followed by the tractor wire implies that the distance between the ply of filaments and the tractor wire passing at the end 39 is minimized so that as soon as the ply arrives on the sliding surface 33 of the doctor blade after its detachment by the blade 31a of the doctor blade, the first filaments can begin to wind in order to cause the others of the sheet like a snowball effect which guarantees better winding of the filaments, unlike the prior art showing a core wire arranged centrally in the oblong element accommodating the glass filaments.
• the pulling wire of the invention is not necessarily made of plastic as in the prior art, but may simply consist of glass.
• the primary purpose of the pulling wire is not to guarantee that a more resistant wire is obtained, but above all serves as a guide and recovery wire. Indeed, this pulling wire is necessary for the formation of the wick to be then pulled to the winder in order to be wound there.
• the tractor or guide wire no longer becomes essential since the filaments of the wick pulled by the winding of the latter automatically entrain the filaments peeling from the cylinder.
• a guillotine 43 which is used to cut the pulling wire after the beginning of the winding of the wick.
• the pulling wire 40 also has the advantage of authorizing the arrangement of the winder 12 at any location relative to the spinning assembly, whether on the same level or on a different stage making the path of the bit not straight at the outlet of the spinning assembly, the pulling wire therefore constituting a guide wire and total support for the whole of the wick which facilitates its driving along a more winding path reducing the risk of breaking the wick.
• the wire 40 constitutes above all a tractor wire according to the invention and not necessarily a core wire since it is generally cut from the start of the winding of the wick.
• the single operator can restart two or more wicks in a single operation, which considerably increases the productivity of the installation.
• a device 70 At the outlet of the orifice 38 is disposed a device 70 called "false twist" constituted by an annular member rotating at high speed through which the wick passes in order to roll it on itself to round it off.
• a device 70 it is still necessary at the output of the device 70 to adjust the volume of the wick so that it is not shaggy making it otherwise unusable, but that the filaments remain in alignment with the wick.
• An air injection nozzle 71 located immediately downstream of the device 70 is therefore provided for further tangling the filaments and smoothing the external surface of the wick.
• a tensioning system 72 well known in the state of the art, constituted by bars staggered so that the wick runs astride these bars, is placed after the nozzle 71 to give the wick tension necessary for the correct construction of the coil which must reach a density of 400 kg / m 3 .
• a second spray system 61 is provided (FIG. 3), positioned downstream of the pre-spinning assembly 50 and upstream of the filament deposition line L in order to coat the surface 21 of the cylinder 20 to guarantee a perfect size of the inner surface of the sheet of filaments which stick to the same surface 21 of said cylinder.
• an articulated arm not shown is provided for mechanically positioning the filaments on the cylinder.
• each spinning assembly comprises a doctor blade
• the blade 31a has a length which corresponds to the number of filaments desired to be unstuck to separate the sheet of filaments into two separate parts in order to wind respectively, using two separate tractor wires, two wicks on two individual winders.
• the arrangement of the pre-spinning assembly 50 downstream of the two spinning assemblies makes it possible in particular to operate only one spinning assembly so as to wind only one part of the ply if necessary, for example for tests, the other part of the sheet being recovered by the pre-spinning assembly to be directly thrown into the waste well 14.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Manufacture, Treatment Of Glass Fibers (AREA)
• Spinning Or Twisting Of Yarns (AREA)
• Glass Compositions (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=8857249

Family Applications (1)

Country Status (18)

Cited By (1)

Families Citing this family (5)

Family Cites Families (6)

• 2000
  • 2000-12-05 FR FR0015743A patent/FR2817548B1/fr not_active Expired - Fee Related
• 2001
  • 2001-10-24 AU AU2002214092A patent/AU2002214092A1/en not_active Abandoned
  • 2001-10-24 PL PL01362353A patent/PL362353A1/xx unknown
  • 2001-10-24 DE DE60109957T patent/DE60109957T2/de not_active Expired - Lifetime
  • 2001-10-24 EP EP01982538A patent/EP1339902B1/de not_active Expired - Lifetime
  • 2001-10-24 CN CNB018200508A patent/CN1330807C/zh not_active Expired - Fee Related
  • 2001-10-24 KR KR10-2003-7007432A patent/KR20030060107A/ko not_active Application Discontinuation
  • 2001-10-24 CZ CZ20031426A patent/CZ20031426A3/cs unknown
  • 2001-10-24 JP JP2002548217A patent/JP2004515659A/ja not_active Withdrawn
  • 2001-10-24 RU RU2003120066/12A patent/RU2238353C1/ru not_active IP Right Cessation
  • 2001-10-24 BR BR0115922-4A patent/BR0115922A/pt not_active IP Right Cessation
  • 2001-10-24 WO PCT/FR2001/003298 patent/WO2002046506A1/fr active IP Right Grant
  • 2001-10-24 MX MXPA03004304A patent/MXPA03004304A/es unknown
  • 2001-10-24 SK SK667-2003A patent/SK286546B6/sk not_active IP Right Cessation
  • 2001-10-24 ES ES01982538T patent/ES2240536T3/es not_active Expired - Lifetime
  • 2001-10-24 AT AT01982538T patent/ATE292701T1/de active
  • 2001-10-24 US US10/432,604 patent/US20040025543A1/en not_active Abandoned
• 2003
  • 2003-06-04 NO NO20032536A patent/NO20032536L/no not_active Application Discontinuation

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