Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
  • D01H1/10—Spinning or twisting machines in which the product is wound-up continuously for imparting multiple twist, e.g. two-for-one twisting
  • D01H1/105—Arrangements using hollow spindles, i.e. the yarns are running through the spindle of the unwound bobbins
  • D01H1/106—Two-for-one twisting
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
  • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
  • B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
  • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
  • B65H63/082—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle responsive to a predetermined size or diameter of the package
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
  • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
  • B65H63/086—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle responsive to completion of unwinding of a package
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
  • D01H1/14—Details
  • D01H1/20—Driving or stopping arrangements
  • D01H1/24—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles
  • D01H1/244—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles each spindle driven by an electric motor
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
  • D01H1/14—Details
  • D01H1/20—Driving or stopping arrangements
  • D01H1/28—Driving or stopping arrangements for two or more machine elements possessing different characteristics but in operative association
  • D01H1/30—Driving or stopping arrangements for two or more machine elements possessing different characteristics but in operative association with two or more speeds; with variable-speed arrangements
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H13/00—Other common constructional features, details or accessories
  • D01H13/10—Tension devices
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H13/00—Other common constructional features, details or accessories
  • D01H13/10—Tension devices
  • D01H13/104—Regulating tension by devices acting on running yarn and not associated with supply or take-up devices
  • D01H13/106—Regulating tension by devices acting on running yarn and not associated with supply or take-up devices for double-twist spindle
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H13/00—Other common constructional features, details or accessories
  • D01H13/32—Counting, measuring, recording or registering devices
• • 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
  • D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
  • D02G3/28—Doubled, plied, or cabled threads
  • D02G3/285—Doubled, plied, or cabled threads one yarn running over the feeding spool of another yarn
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
  • B65H2511/10—Size; Dimensions
  • B65H2511/14—Diameter, e.g. of roll or package
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2513/00—Dynamic entities; Timing aspects
  • B65H2513/10—Speed
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2701/00—Handled material; Storage means
  • B65H2701/30—Handled filamentary material
  • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

• the invention relates to the technical field of the transformation of continuous elongated materials, especially textile yarns, which will be referred to hereinafter as "yarn", such as, for example, twisting, single, double or multiple twisting methods.
• the invention relates to processing methods which consists of unwinding the wire of a food reel, passing it through a spindle which gives it a twist on itself, while being called by a member placed downstream, for example by a delivery and / or a receiving winding system, or by another method of transformation.
• the set of means of unwinding, twisting, delivery, winding system is a unit of transformation, which will be referred to in the following as "working position", each working position being independent or associated with other positions adjacent work areas.
• the transformation process is limited by the unwinding conditions of the food reel or reels.
• the diameter of the coil decreases as unwinding, which affects the unwinding conditions of the wire on the periphery of the coil.
• the rotation of the unwinding point around the coil that is to say the point where the wire leaves the periphery of the coil, accelerates as and when the coil diameter decreases, which increases for example the emptying voltages, the irregularity of these voltages, as well as the twisting of the wire on itself due to this rotation. This influence can affect the quality of the transformation process and / or limit its performance.
• a spool (2) formed of a winding of a thread (1) around a hollow mandrel, is placed in a support (3) itself supported by the axis of a spindle (4).
• This support (3) is secured coaxially with the axis of the spindle (4) by means such as ball bearings, and is prevented from rotating on itself by means of restraining means acting by gravity, or by force magnetic or mechanical, so that the coil (2) and its support (3) do not rotate.
• the thread (1) unwound from the spool (2) is introduced into a channel formed in the axis of the spindle (4), and emerges through a hole (5) opening radially in a cylindrical or conical zone called reserve (6) disposed below the support of the coil (3).
• the wire is wound a few fractions of turns on the reserve (6) and then forms an arc bypassing the coil (2) and its support (3), to join a fixed wire guide (7), before being towed by downstream members (8, 9) according to a given speed V (calling speed).
• V calling speed
• the downstream members consist of a pre-call member (8) for lowering the tension of the thread and a positive calling member (9), the latter guaranteeing the speed V.
• the thread (1) rotates around the spool (2) and its support (3) forming a "balloon".
• the rotation causes a first twist of the wire on itself between the input of the pin and its radial orifice (5) and a second twist of the wire on itself between the radial orifice (5) and the fixed wire guide (5). 7).
• the spindle rotates at N revolutions / min and if the wire is towed at V meters / min, at each minute the wire receives 2 N torsions distributed over V meters, ie 2N / V twists per meter.
• the stability of the process is based on the equilibrium between the tension due to the centrifugal force created by the rotation of the balloon, and the retaining force of the thread between the spool and said balloon. This retaining force is distributed between the emptying forces, the friction of the wire in the winding on the reserve and auxiliary braking means.
• the coronel is formed of an arm (10) rotatable freely about the axis of the spindle (4) and carrying a wire guide (11) at its end.
• the wire (1) passes through the wire guide (11), which has the effect of eliminating the friction of the wire along the periphery and the side of the coil.
• the "coronel" (10) rotates at the same time as the wire (1) to accompany it in its unwinding, this rotation being generally braked by a friction device, magnetic or otherwise, providing a couple resistor designed to generate the braking force necessary for the equilibrium of the process.
• the speed of production is limited so that the speed of rotation of the coronel and / or the voltages generated by the unwinding remain below acceptable values, observing that this speed or these limit voltages are only reached. at the end of unwinding the food roll.
• the method of controlling the process consists of changing the unwinding speed and, in a coordinated manner, the other associated parameters of the conversion process as a function of a quantity representative of the quantity of wire remaining wound on at least one of the coils, so that the production speed remains below the limits imposed by the unwinding conditions on said reel.
• the quantity representative of the amount of wire remaining wound on a reel may be its diameter, its weight, its mass, the length of wire wound on the reel or any other size, which can be obtained, for example by :
• a quantity deduced from a value initialized at the beginning of the unwinding (full spool), and decremented as a function of time according to a preprogrammed law, or as a function of a quantity representative of the evolution of this quantity; a quantity deduced from a value initialized at the beginning of the unwinding (full bobbin), and decremented as a function of the measurement and / or calculation of the amount of thread unwound, or as a function of a quantity representative of the unwinding speed .
• all the devices used for the transformation of a wire constitute an autonomous working position, it is at to say that these members are controlled individually by independent means, so that the parameters of the transformation process can be changed according to a quantity representative of the quantity of wire remaining wound on at least one of the coils implemented in this working position regardless of the state of the adjacent working positions.
• the method of controlling the process consists of:
• the law of evolution of the speed of rotation of the spindle (and proportionally the speed of traction) as a function of the amount of thread remaining wound on the spool has a zone sensitive constant between the initial quantity of the full bobbin and an intermediate amount, and a substantially decreasing zone between said intermediate amount and the minimum amount (or zero) at the end of unwinding.
• Another problem to be solved by the invention is to compensate for the twist variation of the wire resulting from the acceleration of the rotation of the unwinding point around the coil as its diameter decreases.
• the speed of rotation of the spindle and the speed of traction of the yarn are controlled by one or more operators independent of those of the adjacent positions, by changing the speed of rotation of the spindle. and the speeds of the call members as a function of a magnitude representative of the amount of wire remaining wound on the supply reel in a variable ratio, thereby giving the wire a twist per variable meter, as a function of said magnitude representative of the amount of wire remaining on the supply reel, so as to compensate for the variations in torsion per meter induced by the reeling according to said diameter.
• the speed of rotation of the spindle and the speed of traction of the yarn are controlled by one or more operators that are independent of those of the adjacent positions, by changing the speed of rotation of the spindle and the speeds of the members. call based on a magnitude representative of the amount of wire remaining on the supply reel in a variable ratio, thus giving the wire a twist per variable meter, and a scaling law according to said magnitude representative of the amount of wire remaining on the feed reel, to compensate for torsional variations per meter induced by the unwinding or winding operations of the torsion process or upstream or downstream processing processes.
• FIG. 1 is a schematic view of a double twist process, according to the state of the art.
• FIG. 2 shows a diagram illustrating the production speed limits as reeling of the reel, according to the prior art.
• FIG. 3 shows a diagram illustrating the production speed limits as and reel of the reel, according to the invention.
• FIG. 4 is a schematic view of an embodiment of the invention applied to the double twist process.
• the invention is presented here in detail in its application to the double twist process.
• This application example is in no way limiting, other applications that can be envisaged in single twist, multiple twist, direct wiring, wrapping. More generally, the invention applies to any son transformation method, at least one of which is unwound from at least one coil by means of a coronel, in which the evolution of the amount of wire remaining wound on at least one of the feed bobbins (or the diameter of said bobbin) leads to unwinding conditions that affect the quality or performance of the processing process.
• any son transformation method at least one of which is unwound from at least one coil by means of a coronel, in which the evolution of the amount of wire remaining wound on at least one of the feed bobbins (or the diameter of said bobbin) leads to unwinding conditions that affect the quality or performance of the processing process.
• the time (t) is plotted on the abscissa and the speed (V) of production is plotted on the ordinate.
• the speed (V) represents, indistinctly (to a factor of proportion) the spindle speed or the speed of call since, to obtain a given twist, these two speeds are linked by a fixed ratio.
• the coil (2) is full (its outside diameter is maximum). As the production progresses, the diameter of the reel (2) decreases, until the end of the production (21) where it reaches its final value (which is generally close to or equal to the diameter empty coil).
• the production speed (V) is limited by the centrifugal forces generated by the rotation of the balloon.
• the centrifugal force tends to increase the diameter of the balloon and the tensions in the wire (1). It is therefore necessary to limit the speed of rotation to stay within a diameter corresponding to the available space (including the spacing between adjacent pins). It will also limit the speed of rotation to stay below acceptable voltages by the wire (to prevent it from breaking and not affect its resistance by subjecting it to too high stresses).
• This limit depends on the nature and the title of the wire, as well as the geometry of the device. It does not depend on the diameter of the food roll (2) and is therefore substantially constant as a function of time. This speed limit is represented by the line (22).
• the speed of production is also limited by the speed of rotation of the emptying point, for example because of the evolution of the forces resulting from the unwinding which, for a given speed of call, increase as the diameter of the coil (2) decreases.
• the allowable production speed here corresponding to the call speed
• This speed limit is represented by the line (23).
• the curve of the speed limit due to unwinding (23) can remain above the speed limit (22) due to the rotation of the balloon during the entire duration between the start (20) and the end (21) of production.
• the curve of the speed limit due to unwinding (23) falls below the limit due to the rotation of the balloon (22) from a point ( 24) corresponding to a certain amount of wire remaining wound on the coil (2).
• a constant speed limit (25) that is to say below the curve (23) at the end (21) of production ( Figure 2).
• control method of the method consists in: controlling the rotational speed of the spindle (4) and the speed of the traction means of the thread (8, 9) by one or more actuators (12). , 13, 14 ...), independent of those of the adjacent positions, in a constant speed ratio, so as to give the wire one twist per constant meter;
• control of the spindle (4) and the traction means (8, 9 7) have individual drives (12, 13, 14 ... ) controlled by variable speed drives (15, 16, 17), each receiving a set of a calculation unit (18), such as an electronic card, a PLC or other.
• a calculation unit (18) such as an electronic card, a PLC or other.
• the information representative of the amount of wire remaining wound on the reel (2) is communicated to the calculation unit (18) which modifies the speed instructions according to laws of variation as a function of said quantity.
• the evolution law (26) of the speed of rotation of the spindle, (and proportionally the pulling speed), as a function of the quantity of thread remaining wound on the spool (2 ) has a constant sensing area between the start of production (20) and the initial quantity of the solid coil and an intermediate quantity (24) and a substantially decreasing zone between said intermediate quantity (24) and the minimum quantity (or zero ) at the end of emptying (21).
• the method of conducting the method consists of: - To control the speed of rotation of the spindle (4) and the pulling speed of the wire (8, 9 %) by one or more actuators (12, 13, 14 ...) independent of those of the adjacent positions, by changing the speed of rotation of the spindle (4) and the speeds of the call elements (8, 9 %) according to a quantity representative of the amount of wire remaining wound on the supply reel ( 2) in a variable ratio, thus conferring on the yarn a twist per variable meter, so as to compensate for the variations in torsions per meter induced on the yarn by the unwinding according to said diameter.
• such compensation consists in establishing a law of evolution of the ratio between the speed of call and the spindle speed in order to compensate for the variations of torsions induced by all the phases of winding, feeding and transformation upstream. or downstream of the twisting process.
• the method of conducting the method comprises:
• the quantity representative of the amount of wire remaining wound on the coil (2) can be, for example:
• a direct or indirect measurement of said diameter of the coil (2) can be performed for example by optical means, ultrasound or other means.
• the measurement can be continuous or discrete, ie detecting the passage through one or more intermediate diameters, for example, by electric cells whose beam is cut when the coil reaches the said intermediate diameter or diameters.
• a direct or indirect measurement of the weight of the coil can be made by measuring the weight of the bobbin alone, or with its support, or even by monitoring the weight of the complete spindle.
• the measuring means mentioned above may be disposed outside said support and the balloon formed by the wire. They can also be embedded with the coil (2) or its support (3) inside said balloon, in which case, the information can be transmitted by any infrared, radiofrequency or other means ...
• the magnitude representative of the amount of wire remaining wound on the coil (2) can also be developed by calculation, from information representative of the evolution of this quantity. For example, for a given production speed, this amount of yarn on the feed roll decreases because of the weight or length taken per unit of time.
• the amount of wire remaining wound on the reel and therefore the evolution of its weight and / or its diameter can be calculated from, for example:
• the calculation can be performed in the computer (18) or by any other external means and communicated to the latter, for example by a network (19).
• the development of the magnitude representative of the amount of wire remaining wound on the coil, the calculation of the production speed and its transmission to the organ control means, in particular the pin (4) and the call system (8, 9 7) can be made by any appropriate means such as computers (18) or electronic circuits, a PLC or other associated with sensors, counting systems, etc ...
• the invention can be applied for machines equipped with collective motorization means. It provides a great advantage for machines consisting of autonomous working positions, that is to say equipped with individual motorization means. Indeed, each working position is controlled to obtain the optimal production speed, depending on the unwinding state of its own coil.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Quality & Reliability (AREA)
• Tension Adjustment In Filamentary Materials (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
• Treatment Of Fiber Materials (AREA)
• Spinning Or Twisting Of Yarns (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=35768107

Family Applications (1)

Country Status (5)

Families Citing this family (12)

Family Cites Families (14)

• 2005
  • 2005-06-21 FR FR0551677A patent/FR2887237B1/fr not_active Expired - Fee Related
• 2006
  • 2006-06-15 WO PCT/FR2006/050603 patent/WO2006136747A2/fr not_active Application Discontinuation
  • 2006-06-15 BR BRPI0611708-2A patent/BRPI0611708A2/pt not_active Application Discontinuation
  • 2006-06-15 US US11/993,486 patent/US20080308664A1/en not_active Abandoned
  • 2006-06-15 EP EP06778950A patent/EP1893794A2/de not_active Withdrawn

Non-Patent Citations (1)

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