Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
  • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
  • D01G15/76—Stripping or cleaning carding surfaces; Maintaining cleanliness of carding area
  • D01G15/82—Arrangements for confining or removing dust, fly or the like
  • D01G15/825—Arrangements for confining or removing dust, fly or the like by suction or blowing

Definitions

• the invention relates to a method for reducing the accumulation of fibers in the side portions of a rotating roll of a card, and to a card which is suitable for carrying out such a method.
• the field of the invention is that of the textile industry, namely cardes used to disentangle and aerate textile fibers from a raw fiber mat.
• a card conventionally comprises a plurality of so-called carrier drums (hereinafter referred to as cylinders), of which at least one carding drum on the periphery of which carding members are mounted.
• the fiber mat is introduced at the entrance of the card, the individualized fibers under the combined actions of the rotating card cylinder liners and carding members.
• the invention relates more particularly to a card whose carding members comprise at least one or more rollers, rotatably mounted at the periphery of the carding cylinder.
• the invention is concerned here with the problem of accumulation of fibers in the cards.
• EP 1 612 304 A1 and in order to prevent the fibers from falling to the ground from the peripheral wall of the cylinder, it is conventional for the skilled person to mount:
• a fairing (fixed relative to the frame), in the immediate vicinity of the cylinder, extending in length over the entire length of the cylinder carding,
• EP 1 612 304 A1 provides a solution to this problem, mainly in:
• a first problem originates at the level of the sealing zone between the lateral chamber and the curved fairing, an area for example illustrated in the detail view of FIG. 2 of EP 1 612 304 A1.
• the sealing between the side flange and the fairing ie the seal marked 10
• the local air flow of the leak in this sealing zone escaping from the lateral chamber is not determined in that it constitutes an uncontrollable part of the flow of air.
• a second problem has its origin when two consecutive cylinders implement the method according to document EP 1 612 304 A1.
• this active barrier can be implemented not only at the ends of the large drum (ie the carding cylinder marked 5), but also at the ends of the front train (ie the carding cylinder marked 2), and at the ends of the cylinder marked 4 ensuring the transfer of the textile web from the front train to the large drum.
• the lining of the transfer cylinder marked 4 takes up the textile ply of the front-end cylinder marked 2, at a first zone of recovery between these two cylinders, the lining of the large drum spotted 5 taking up the textile web of the cylinder. transfer identified 4, at a second recovery zone, distant from the first.
• the air escaping radially at the periphery of the lateral chamber associated with the transfer cylinder marked 4 is, at each recovery zone, in immediate conflict with the air escaping radially at the periphery of the lateral chamber; associated with the carding cylinder (of the marked front end 2, or the large drum marked 4): concretely and except to be able to perfectly balance the pressures of these two leaks, one takes over the other and generates a suction of air in the lateral chamber of lower pressure locally, at this area of recovery,
• each zone of recovery between two cylinders is moreover an area where the cylinders are intimately close to their periphery, which causes a crushing of the air boundary layer: this crushing generates lateral air flows directed towards the ends of the cylinder: textile fibers are thus driven by these lateral air flows towards the side parts to the rolls, these fibers then being sucked into the side chamber of lower pressure.
• each scanner roller is equipped with a flange marked F ', fixed, defining with the roller a side chamber E'.
• this flange marked F ' comprises a central portion in the form of a disc, extending generally parallel to the side face of the cylinder, and, notably, an outer rim, marked 19b, of diameter slightly greater than the end of the roll, capping the end of the roll on a short axial distance.
• the internal diameter of the fixed flange abuts on a bearing ensuring the rotational guidance of the roller relative to the frame.
• this roll-side chamber is pressurized by air passing from the side chamber of the adjacent carding cylinder.
• a side wall conventionally extends the disk of the flange, in particular at its upper part, and so as to laterally close the space under the hood of the card which covers all the cylinders and rollers.
• the zone defined between this side wall and the marked rim 19b forms a nook, conducive to fouling, on which the textile fibers are deposited during operation, without ever being evacuated.
• the present application aims to answer all or part of these three problems identified above.
• Document CN 101 509 158 A also discloses a carding roll whose shaft is rotatably mounted in a support via a bearing.
• this support comprises two parts 2, 21.
• the first part 2 covers the bearing at a first end and partially overlaps a lateral face of the roll 1 at its other end. by being housed in a piercing of the lateral face.
• a compressed air supply chamber 7, 8, 13 is formed inside the two parts 2, 21 of the support comprising a plurality of sections 7, 8, 13 and extends from one end of the second part 21 of the support comprising a supply connection 51 in compressed air until the bore formed in the side face of the roll 1.
• the air which is supplied at the supply connection 51 firstly traverses the annular cavity 7, then the longitudinal chamber 8 around the shaft 11 and finally the chamber 13 formed between the lateral face of the roll 1 and the end of the first portion of the support 2, before being expelled towards an outer face of the first portion 2 of the support in an axial direction (relative to the shaft 11), in order to expel the fibers that could to be accumulated during the carding process.
• Such a device has several disadvantages.
• the length of the path that will have to travel the air from the supply connection 51 to its expulsion at the outlet of the chamber 13, is important, which increases the pressure losses along the path, and requires supplying compressed air at the supply connection 51 with a very high flow rate and pressure so that the flow rate and the pressure of the air expelled at the outlet of the chamber 13 are satisfactory, which is complex and requires employ expensive solutions for the supply of compressed air, for example by the use of a compressor, especially if several devices must be fed by the same compressed air supply means, for example a compressor.
• the invention therefore also proposes to overcome these various disadvantages.
• document JP 06051276 U discloses a carding roll comprising a shaft rotatably mounted in a support.
• a first feed chamber is formed between two flanges arranged around the shaft 11.
• a first flange is disposed inside the carding roller 7 and a second flange 12 is arranged so as to cover the lateral face of the carding roll 7 and extends beyond the carding roll 7.
• the second flange 12 forms a feed channel around the portion of the shaft 11 projecting beyond of the carding roll 7, communicating with the first feed chamber.
• the supply channel can be supplied with compressed air, and the air passes through this supply channel and enters the feed chamber before being expelled at a slot formed between the outer wall of the carding roller. and a shoulder formed on the second flange 12.
• a partition 8 is fixed on the second flange 12 and the air expelled at the slot at the outlet of the feed chamber will expel the fibers that may have accumulated between the partition 8 and a face of an upper roller cooperating with the carding roll 7.
• Such a device has several disadvantages.
• the direction in which the air is expelled at the slot is not necessarily radial (in the direction of the shaft 11) and the fibers that may have accumulated in the area between the top roll and the partition 8 at an outer face of the second flange 12 will not be expelled optimally.
• the length of the path that will have to travel the air from the supply channel until expulsion at the slot is important, which increases the pressure losses along the path, and requires to provide compressed air with a very high flow rate and pressure so that the flow and the pressure of the air expelled at the slot are satisfactory, which is complex and requires the use of expensive solutions for the air supply compressed, for example by the use of a compressor, especially if several devices must be powered by the same means for supplying compressed air, for example a compressor.
• the fibers will accumulate on a substantially horizontal flange of the second flange 12, perpendicular to the partition 8 and the expelled air will undergo disturbances in this area because of the orthogonality between the flange of the second flange 12 and septum 8, which does not allow to properly expel the fibers that may have accumulated in this area.
• the invention therefore also proposes to overcome these various disadvantages.
• the invention relates first of all to a card comprising a carding cylinder and at least one carding roller mounted on the periphery of the carding cylinder, the support shaft of the carding roller being rotatably mounted on the frame by means of bearings.
• a card comprising a carding cylinder and at least one carding roller mounted on the periphery of the carding cylinder, the support shaft of the carding roller being rotatably mounted on the frame by means of bearings.
• On both sides of the carding roll having at least two side plate systems, mounted fixed on either side of the carding roll, each covering the lateral face of the carding roll, each traversed by the support shaft, connecting each said bearing at the periphery of the carding roller, each flange system comprising:
• a nozzle system suitable for blowing the fixed peripheral zone of said flange system, at least at its upper part, from the air of said cavity.
• the flange system has two circular elements, assembled to one another, including a first flange element covering the lateral face of the roller, and a second bearing element whose internal diameter cooperates directly or not with the bearing, said cavity supplied with air being materialized at least in part by a groove of said second support element opening laterally to said second support element, partially closed by the inner surface of the first flange element, opposite on the outer face of the first member facing the roll, and so that the nozzle system results from a slit of the flange system defined by a peripheral gap between said first flange member and said second support member.
• the cavity is an annular chamber extending at least partly around the axis of the carding roller;
• the nozzle system has a peripheral slot extending and continuously opening into said annular cavity, providing an air blast on the periphery of said flange system, without blowing discontinuity, at least along the active portion of the annular cavity;
• the card has a closure member partially housed in said annular cavity on an angular fraction of said annular cavity, centered on the zone interface between the carding cylinder and the carding roll, so as to prevent a direct blow from said nozzle system to the carding roll in a radial direction to said carding roll;
• said external means for supplying air to said annular cavity directly feeds the annular cavity into a zone of the cavity remote from the interface zone between the roll and the roll, such as, for example, diametrically opposite said zone;
• said external means for supplying air to said annular cavity comprises a screw-needle type flow control member suitable for adjusting the flow rate of air entering said cavity
• the carding roll has a cylindrical end, at the periphery of the roll, projecting laterally from the lateral face of said roll, which caps a disc of the flange system, the disc and the cylindrical end being sealingly mounted by virtue of a circular sealing performed between the outer diameter of the disk of the flange system, on the one hand, and the inner diameter of the cylindrical end, on the other hand;
• the card has at least one nozzle and means for supplying air to said nozzle, said nozzle being blown in an axial direction, locally at the interface zone between the carding cylinder and said carding roller;
• the flange system is extended by a fixed side wall, closing the housing laterally, extending to the housing cover;
• the peripheral gap between the first flange element and the second support element defining the slot of the nozzle system is inclined towards the fixed side wall relative to the vertical by an angle between 2 ° and 45 ° the second support member being shaped so that the nozzle system licks the fixed side wall;
• the flange system comprises a peripheral groove, receiving in nesting an edge of the fixed side wall.
• the card comprises:
• At least one fairing arranged fixed in the lower part of the carding cylinder, said fairing extending axially over the entire length of the carding cylinder, the inner wall of the fairing being arranged in the immediate vicinity of said carding cylinder, taking up the curvature of the cylinder on an angular fraction of the cylinder, defining an interspace extending in length along an arc of a circle in a plane perpendicular to the carding cylinder,
• a blowing system of the inter-space zone comprising:
• a second lateral flange perpendicular to the longitudinal axis of the cylinder and the fairing, closing laterally said inter-space between the fairing and the carding cylinder, comprising a through slot, facing said inter-space,
• Means for supplying the air distribution chamber with air comprising a flow control means supplying said air distribution chamber.
• the invention also relates to a method for reducing the accumulation of fibers in the lateral parts of a rotary roller of a card according to the invention, in which the cavity of each flange system is supplied with air so as to implement radial blowing, at least on the fixed peripheral upper part of the flange system.
• the method is implemented in a card having said at least one nozzle, and in which air is supplied two nozzles located at both ends of the interface zone, each blowing in an axial direction, locally at the interface area between the carding cylinder and said carding roller.
• the method is implemented in a card according to the invention comprising said at least one blowing system of the inter-space zone, in which two blowing systems of the zone d are air fed. inter-space so as to generate a localized blow at the inter-space zone between the carding cylinder and the fairing, at the two longitudinal ends of said inter-space.
• FIG. 1 is a partial sectional view of a card according to the state of the art, illustrating in detail the fixed lateral flange connecting, on the one hand, a support bearing of the rotation shaft of the roller, and on the other hand, the periphery of the roll and according to a known arrangement of the state of the art mentioned in the introduction: this view more particularly illustrates the third problem identified by the inventor in this state of the art, namely an accumulation fibers on the corner formed between, on the one hand, the flange of the flange capping the roller, and a vertical wall extending the flange, on the other.
• FIG. 2 is a partial sectional view of a card according to the invention, illustrating in detail the fixed lateral flange system connecting, on the one hand, the support bearing of the rotation shaft of the roller, and on the other hand on the other hand, the periphery of the roll, the design of which advantageously allows the implementation of a blow-molding at the corner formed between the periphery of the flange system and the side wall, and so as to solve the problem of accumulation of fibers by this corner,
• FIG. 3 is a partial sectional view according to FIG. 2, also illustrating in detail, on the one hand, in the upper part of the flange system the presence of a screw-needle-type flow control device allowing adjusting the air flow at the inlet of the annular cavity of the flange system, and secondly, in the lower part the presence of a closure member partially housed in said annular cavity on an angular fraction of said annular cavity of so as to prevent a direct blow from said nozzle system to the carding cylinder, but also, the presence of a nozzle, separate from the flange system, coming to blow in an axial direction, locally at the interface zone between the carding cylinder and said carding roll,
• FIG. 4 is a perspective view diagrammatically illustrating, on the one hand, the radial flows generated by the flange system, constituting an active barrier against depositing fibers on the periphery of the system, and on the other hand, the axial flow of the nozzle constituting an active barrier at the end of the interface zone between the carding roll and the carding roll,
• FIG. 5a is a partial sectional view of a card according to the state of the art, according to a sectional plane passing through the axis of rotation of the cylinder, illustrating more particularly the lateral chamber placed under pressure delimited between the face side of the carding cylinder (rotary element), on the one hand, and the lateral flange and the fairing (fixed elements), on the other hand, which is sealed at the junction between the fairing and the lateral flange: this view further illustrates the creation of an axial leak flow at the interface zone between the shroud and the cylinder whose flow is not determined in that it constitutes an uncontrollable part of the total air flow supplying the lateral chamber, this view has the object (in combination with FIG. 5b) of illustrating the first problem identified by the inventor,
• FIG. 5b is a view of the card of FIG. 5, in a section plane perpendicular to the axis of the cylinder, this view more particularly illustrating the first fouling problem identified by the inventor in this state of the art. , ie (and when this axial flow is uncontrolled) the birth of peripheral flows along the gap between the fairing and the cylinder, which emerge from the longitudinal edges of the fairing by driving fibers,
• FIG. 6 is a side view illustrating a carding cylinder, and the presence of a fairing, the presence of a flange at the end of the fairing being omitted,
• FIG. 7 is a view according to FIG. 6 illustrating this flange, said second lateral flange, belonging to the blowing system of the interface zone between the fairing and the cylinder,
• FIG. 8 is a view opposite to FIG. 7, particularly illustrating the presence of a blowing slot facing said inter-space, extending in length along the periphery of the cylinder by taking up the curvature of the cylinder,
• FIG. 9 is a view along a section plane simultaneously traversing the cylinder, the shroud and the blowing system of the interface zone, this view more particularly illustrating an air distribution chamber of the blowing system communicating with said slot and a flow control member for controlling air flow supplying said air distribution chamber
• FIG. 10 is a partial sectional view of a card according to the state of the art, illustrating the second fouling problem identified by the inventor, at the level of the zone of recovery between two pressure cylinders, when the lateral chamber of a cylinder is not pressure-balanced with the lateral chamber of the adjacent cylinder at this recovery zone, namely the suction of textile fibers in the chamber of locally lower pressure at this zone of recovery,
• FIG. 11 is a view of a card configuration according to the invention, by way of exemplary embodiment.
• a card for the production of nonwoven, or for example semi-combed This card 1 comprises as input a feed trough (not shown), a food roll 3c and a breaker cylinder 21.
• the breaker cylinder 21 feeds the marked carding cylinder 2a, usually called pre-train cylinder.
• Several successive carding assemblies are provided at the periphery of the cylinder 2a, each assembly comprising a brush roll 3a followed by a worker roll 3b.
• a transfer cylinder 2b takes up the fibers of the carding cylinder 2a and transfers them to a second carding cylinder 2c.
• This second carding cylinder 2c usually called large drum, comprises, like the first carding cylinder 2c, a plurality of successive carding assemblies, each set comprising a brush roll 3a followed by a worker roller 3b.
• the combined actions of the rotary carding cylinder liners and carding assemblies allow to individualize the fibers of the fiber mat introduced at the entrance.
• Two card outlets each include a 2d or 2f doffer roll, a 3d peeler roll, and a conveyor belt (not shown).
• the invention is primarily concerned with the resolution of the third problem identified by the inventor, namely an accumulation of fibers Ac 'on the nook formed between, on the one hand, the rim 19b' of the flange F 'styling the roller which can be a sweeping roller or a worker roller, and a vertical wall extending the flange, on the other hand.
• This problem is shown in Figure 1 which illustrates a state of the art mentioned in the introduction.
• the roller which can be a scanning roll 3a 'or worker 3b', the fixed flange F ', substantially parallel to the lateral face of the roll and forming the lateral chamber E' which, depending on the the technique disclosed in Figure 5 of EP 1 612 304 is supplied with air and thus pressurized.
• the disc of the flange is still recognizable, substantially parallel to the lateral face of the roll and the marked flange 19b ', which extends in length in an axial direction to cover the roll. It is noted that this rim 19b ', fixed, forms with a fixed vertical wall juxtaposed a corner promoting fouling where a build-up Ac' of fibers.
• the invention relates to a card 1 comprising a carding cylinder 2 and at least one carding roll 3 mounted on the periphery of the carding cylinder 2.
• the support shaft 30 of the carding roll 3 is rotatably mounted on the frame by the intermediate bearings 4, on both sides of the carding roller 3.
• the card comprises at least two lateral flange systems 5, fixedly mounted on either side of the carding roller 3, each covering the lateral face of the carding roll, each traversed by the support shaft 30, each connecting said bearing 4 to the periphery of the carding roller 3.
• Each flange system 5 comprises:
• a nozzle system 52 suitable for blowing the fixed peripheral zone of said flange system, at least at its upper part, from the air of said cavity.
• the invention arose from the finding by the inventor that the peripheral surface of the flange system 5 forms, with a side vertical wall marked 8, a fixed corner area, favorable to the deposition of textile fibers.
• the flange system 5 can result from the assembly of two circular elements, assembled to one another, including a first flange element 54. covering the lateral face of the roll 3, and a second bearing element 55 whose inner diameter cooperates directly (or not) with the bearing 4.
• Said cavity 50 supplied with air may be embodied at least in part by a circular groove of said second bearing element 55 opening laterally to said second bearing element 55.
• This groove is partially closed by the internal surface of the first flange element 54, opposite to the outer face of the first element 54, namely the side facing the roller 3.
• the nozzle system 52 then results from a slit of the flange system 5 defined by a peripheral gap between said first flange element 54 and said second support element 55 defined by the walls between these two elements.
• the carding roll 3 which may be a sweeping roll 3a or a worker roll 3b, is recognized, the support shaft 30 extending longitudinally on both sides. other support, guided on both sides of the roller by bearings 4.
• Each bearing 4 comprises an inner ring secured to rotate with the shaft and an outer ring, fixed, integral with the frame which are guided in rotation one of relative to the other, particularly by means of bearings.
• the flange system 5 fixedly mounted on the lateral side of the lateral surface of the carding roller, each traversed by the support shaft 30, each connecting said bearing 4 to the periphery of the carding roller 3, is also recognizable.
• This flange system 5 forms with the lateral side of the roller, a preferably sealed chamber protecting this inter-space of the fiber entries, a rotating type seal, circular, which can be provided between the flange system, fixed, and the roller 3, rotatable.
• such a flange system 5 makes it possible to implement a radial blowing at least on the upper part of the flange from the inside to the outside, and for the purpose of prohibit the accumulation of fibers in this nook zone.
• the blowing implemented may be continuous in time or not, for example performed periodically.
• the fibers discharged by the blowing implemented by the flange system can be taken in a forced air stream generated between the hood and the rolls / rolls of the card, and known as such.
• a forced air stream generated between the hood and the rolls / rolls of the card, and known as such.
• Such a current is represented in FIG. 11 by arrows, one or more suction hoods 101, 102, 103 of the hood provided with ventilation means for generating a suction flow from bottom to top.
• the cavity 50 may be an annular chamber extending at least partly around the axis of the carding roller 3.
• the nozzle system 52 may have a peripheral slot extending and continuously opening into said annular cavity 50, ensuring blowing air on the periphery of said flange system, without blowing discontinuity, at least along the active portion of the annular cavity 50.
• the nozzle system may comprise several distinct nozzle openings, distributed at the periphery of the system each nozzle opening communicating with said annular cavity.
• a shutter member 53 may be partially housed in said annular cavity 50 on an angular fraction of said annular cavity, preferably centered on the interface zone Zrc between the carding cylinder 2 and the carding roll 3.
• This closure member 53 then prohibits a direct blowing of said nozzle system 52 to the carding cylinder 3, namely in a radial direction to said carding cylinder 3.
• the portion of the cavity 50 housing the closure member 53 is then rendered inactive.
• said external means 51 for supplying air to said annular cavity directly feed the annular cavity 50 into an area of the cavity remote from the interface zone Zrc between the roll and the roll, such as for example diametrically opposed to said zone as shown for reference in FIG. 3.
• Said external means 51 for supplying air to said annular cavity 50 may comprise a flow-rate adjusting member 57 of the screw-needle type suitable for regulating the flow of air coming in. in said cavity 50.
• each flange system 5 has such an individual flow control means 57.
• the carding roll 3 has a cylindrical end 31, peripherally of the roll, projecting laterally from the side face of said roll, capping a disk of the flange system. 5.
• the disc D and the cylindrical end 31 can be mounted sealingly by means of a circular seal 6, of the rotary joint type formed between the outer diameter of the disk D, on the one hand, and the internal diameter of the cylindrical end 31 of the roller 3, on the other hand.
• the roller 3 is to cap the flange system 5 for sealing the roll / flange system, and unlike the state of the art illustrated in Figure 1 or on the contrary the flange with its flange 19b which covers the roll, maximizing the fixed surface on which the accumulations of fibers can be deposited.
• the flange system 5 may comprise a peripheral groove 56, receiving in engagement a circular edge of the fixed side wall 8.
• This side wall 8 extends the flange system 5 extending to the hood of the housing closing the housing laterally.
• This side wall may be transparent, and constitute a control window.
• the peripheral gap between the first flange element 54 and the second support element 55 defining the slot of the nozzle system 52 may be inclined towards the fixed lateral wall 8 with respect to the vertical of an angle of between 2 ° and 45 °, the second support element 55 being shaped so that the nozzle system 52 licks the fixed side wall 8.
• the second support element 55 can thus be shaped so that the nozzle system 52 is directly in the extension of the fixed lateral wall 8 without a substantially horizontal rim being formed. by the second support member 55 in the area at which fibers would accumulate near the fixed side wall 8.
• the peripheral gap between the first flange element 54 and the second support element 55 being inclined relative to the vertical by an angle of between 2 ° and 45 °, in particular 30 °, to blow the air.
• the air at the periphery of the carding roll 3 in a substantially radial direction combined with the absence of a substantially horizontal edge in the area at which the fibers would accumulate near the fixed side wall 8 makes it possible to obtain an evacuation. all the fibers that would accumulate near the fixed side wall 8.
• the card may further comprise a nozzle 7 and means 70 for supplying air to said nozzle, said nozzle 7 blowing in an axial direction, that is to say parallel to the cylinder, locally at the interface zone Zrc between the carding cylinder 2 and said carding roll 3.
• Such a nozzle 7 is distinct from the flange system 5: it is positioned laterally to the roller (and to the cylinder) so that its air flow is directed axially at the interface zone Zrc.
• This controlled flow rate is an active barrier which prevents the fibers from escaping from this interface laterally.
• the air flow of this nozzle 7 can be controlled by means of flow control means 70, such as a needle screw. This is a means of individual adjustment.
• This nozzle 7 can be located on the other side of the side wall 8 with respect to the cylinder and the roller: the flow of the nozzle passes through an orifice 80 of the side wall before reaching the interface zone Zrc.
• the card may also comprise for each carding cylinder a fixed lateral flange Fcyl, covering the lateral face of the carding cylinder 2 sealingly cooperating with the peripheral cylindrical end of said carding cylinder 2.
• the lateral chamber formed between the lateral face of a carding cylinder 2 and the fixed flange Fcyl is preferably not supplied with air. This makes it possible to avoid the second problem mentioned in the introduction illustrated in FIG. 10 when two consecutive cylinders implement the method according to document EP 1 612 304 A1.
• FIG. 10 is a partial sectional view of a card in a plane passing through the axes of rotation of two consecutive rolls of the card, such as the transfer cylinder and the cylinder of the large drum.
• a lateral chamber E “or E” ' is formed between the lateral face of the cylinder and a fixed lateral flange, and this chamber E “or E” is supplied with power. in air.
• each zone of recovery between two cylinders is an area where the cylinders are intimately close to their periphery, which causes a crushing of the air boundary layer: this crushing generates side air flows (illustrated by the double arrow of Figure 10) directed towards the ends of the cylinder: textile fibers are thus driven by these lateral air flows towards the side parts to the rolls, these fibers then being sucked into the side chamber locally lower pressure.
• the card according to the invention may comprise:
• At least one blowing system 10 of the inter-space zone Zcc comprising:
• a second lateral flange Fcar perpendicular to the longitudinal axis of the cylinder and the fairing, laterally closing said inter-space Zcc between the fairing 9 and the carding cylinder 2, comprising a through slot 11 opposite said inter-space Zcc - an air distribution chamber 12 on the back of the second flange Fcar, communicating with said through slot 11, - means 13 for supplying the air distribution chamber with air comprising a flow control means supplying said air distribution chamber 12.
• Such a blowing system 10 makes it possible to generate an intensity blast such as to prohibit the transfer of fibers from the inter-space Zcc to the side portions of the cylinder, while avoiding an overcurrent of blowing.
• two blowing systems are provided at the two longitudinal ends of the fairing, and so as to block the fibers at the two longitudinal ends of the inter-space Zcc. This avoids the first problem identified by the inventor, shown in Figures 5a and 5b.
• FIG. 5a shows the lateral chamber marked E “delimited between, on the one hand, the lateral face of the cylinder, and the lateral flange F 'and the fairing C (fixed elements), on the other hand, which is watertight at the junction between the fairing C and the side flange F ', for example by using a seal marked J'
• This side chamber E is put under overpressure by a source of air outside the chamber which creates an air flow FI ', rising axially at the inter-space between the fairing and the cylinder.
• the local air flow of the flow FI 'in this sealing zone escaping from the lateral chamber E " is not determined in that it consists of an uncontrolled part the total air flow supplying the lateral chamber E ": very often this flow FI 'is too important in this sealing zone: the pressure losses being greater in the axial direction of the cylinder along the inter-space this flow of air tends to emerge through the longitudinal edges of the fairing, and as illustrated by the marked flow F2 'and F3' of Figure 5b, bringing with it textile fibers that will fall to the ground.
• the blowing system 10 of the inter-space zone Zcc makes it possible to avoid such an overcurrent of blowing, in that the slot 11 of the second flange Fcar is located only at the right of this inter-space zone Zcc, at the level of the longitudinal end of the fairing 9, and in that the flow of air passing through this slot 11 can be precisely controlled by the flow control means of the screw-needle type or equivalent system.
• blowing system 10 of the inter-space zone Zcc between the cylinder and the fairing corresponding to the first problem identified by the inventor is independent of the flange system, identified 5, which allows him to solve the third problem identified by the inventor.
• the applicant reserves the right to file a divisional application for this invention not claimed as such and which relates to a card 1 comprising a carding cylinder 2 and carding members mounted at the periphery of the carding cylinder,
• said card comprising:
• At least one first fixed lateral flange Fcyl covering the lateral face of the carding cylinder 2 sealingly cooperating with the peripheral cylindrical end of said carding cylinder 2,
• At least one blowing system 10 of the inter-space zone Zcc comprising:
• a second lateral flange Fcar perpendicular to the longitudinal axis of the cylinder and the fairing, laterally closing said inter-space Zcc between the fairing 9 and the carding cylinder 2, comprising a through slot 11 opposite said inter-space Zcc ,
• the second flange Fcar is preferably located in the extension of the first flange Fcy.
• two blowing systems are provided at the two longitudinal ends of the fairing, and so as to block the fibers at the two longitudinal ends of the inter-space Zcc.
• Cylinder card (including first carding cylinder 2a or second carding cylinder 2c),
• Rolling card in particular roller brush 3a or roller worker 3b
• Air supply means (nozzle 7),
• Fairing in particular fairing 9a or 9b
• Second lateral flange integral with the end of the fairing, laterally closing the interface zone between the fairing and the peripheral wall of the cylinder,
• roller sweeper or worker roller

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Preliminary Treatment Of Fibers (AREA)

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• 2016
  • 2016-05-11 FR FR1654198A patent/FR3051199B1/fr active Active
• 2017
  • 2017-05-10 WO PCT/FR2017/051114 patent/WO2017194878A1/fr unknown
  • 2017-05-10 EP EP17727290.3A patent/EP3455397A1/de not_active Withdrawn

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