EP1820764B1 - Device and procedure for the regulation of the contact pressure of a winding bobbin - Google Patents

Device and procedure for the regulation of the contact pressure of a winding bobbin Download PDF

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Publication number
EP1820764B1
EP1820764B1 EP07102088A EP07102088A EP1820764B1 EP 1820764 B1 EP1820764 B1 EP 1820764B1 EP 07102088 A EP07102088 A EP 07102088A EP 07102088 A EP07102088 A EP 07102088A EP 1820764 B1 EP1820764 B1 EP 1820764B1
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EP
European Patent Office
Prior art keywords
bobbin
winding
value
holder arm
length
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP07102088A
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German (de)
English (en)
French (fr)
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EP1820764A2 (en
EP1820764A3 (en
Inventor
Roberto Badiali
Giorgio Colomberotto
Demetrio Claut
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Savio Macchine Tessili SpA
Original Assignee
Savio Macchine Tessili SpA
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Publication of EP1820764A2 publication Critical patent/EP1820764A2/en
Publication of EP1820764A3 publication Critical patent/EP1820764A3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/40—Arrangements for rotating packages
    • B65H54/52—Drive contact pressure control, e.g. pressing arrangements
    • 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
    • B65H59/388—Regulating forwarding 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
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/12—Density
    • 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 present invention relates to a device and procedure for regulating the winding of thread onto a bobbin to obtain the formation of high-quality bobbins both with respect to form and winding density, in the collection of yarn produced or processed by textile machines for bobbin winding.
  • the collection technique of yarns is widely prevalent, by activating the rotation of a tube, made idle by the mandrels of a bobbin-holder arm and pulling the yarn coming from a releasing organ to be wound thereon.
  • the bobbin is thus formed by pulling and winding the yarn onto its surface, as it is entrained in rotation with an underlying motorized roll on which the bobbin itself rests.
  • the yarn to be wound at a constant linear rate, regardless of the dimension of the bobbin with the advancing of the winding, and only in relation to the rotation rate of said driving roll.
  • the bobbin-holder arm moves away and progressively rises with respect to the motorized driving roll in rotation of the bobbin rotating around its hinging on the structure of the machine.
  • the yarn is thus spirally wound onto the rotating bobbin and distributed with a backward and forward movement on its surface.
  • the bobbin According to the necessities for the subsequent use of the yarn on the bobbin for processing downstream of the bobbin winding, the bobbin must have a conical or cylindrical form, by winding it onto a conical or cylindrical tube.
  • the driving rolls can also be conical or cylindrical.
  • the distribution of the yarn on the bobbin is effected by the same driving cylinder, which is processed with traversing throats 17 which distribute the thread 18 with an axial backward and forward movement on the surface of the bobbin 10, whereas the driving cylinder 16 in rotation gives it the necessary driving torque for its winding.
  • the number of traversing helixes situated on the bobbin driving cylinder 16 varies according to the titers and densities of the bobbin to be obtained.
  • the invention is described herein with reference to automatic bobbin winders in the winding of thread onto a conical tube to form a conical bobbin, moved with a driving roll having a straight cylindrical form, but with the specification that it can also be applied to bobbin winders in which straight cylindrical bobbins are formed, moved in rotation with conical or cylindrical rolls, and also for other textile machines in which the thread processed or produced upstream is collected on bobbins.
  • Bobbin winders generally consist of a series of heads or bobbin winding units aligned along the whole front of the machine and equipped with common service equipment for their running; each of them is independent of the others and consequently the bobbins in formation can have different advance degrees in their winding.
  • the bobbin 10 is held by the bobbin-holder arm 11 equipped with two counterpoints 12, 13 which are engaged with the conical tube 14 of the base of the bobbin.
  • the conical bobbin in formation 10 rests and presses on the driving roll or cylinder 16, driven by the motor M.
  • the traversing throats 17 distribute the thread 18 with an axial backward and forward movement on the bobbin.
  • the bobbin 10 in formation progressively increases in dimension and weight.
  • the resting pressure of the bobbin on its collection cylinder 16 has a great influence on the density of the bobbin itself.
  • the technical problem towards which the present invention is directed is to obtain a good bobbin form, in the sides in the bottom and in the tip, and also in the correct packing of the yarn on its surface, by regulating the parameters which influence it.
  • the main winding parameters which influence the packing of the yarn are the bobbin/cylinder pressure and the tension of the winding thread.
  • each bobbin winding unit which forms the bobbin winder is equipped with its own counterweighing device which regulates the pressure exerted by the bobbin on its driving or collection roll 16.
  • the weight exerted by the bobbin on the cylinder derives from the bobbin-holder arm 11 and from the bobbin 10.
  • the bobbin-holder arm 11 is a device which can be raised and lowered rotating around a fulcrum and which has its own invariable and defined weight.
  • the bobbin-holder arm is generally produced with a considerable weight to satisfy the requirements of stability and attenuation of the vibrations.
  • the bobbin 10 also has its own weight, which increases as the winding proceeds and also contributes to the overall resting pressure on the collection cylinder 16. Without counterweighing, the contact pressure of the bobbin on the cylinder would generally be excessive.
  • the remedy generally adopted is that of counterweighing by applying a force to the bobbin-holder arm which contrasts the weight of the arm and bobbin, with pneumatic devices or devices with springs anchored on one side to the structure of the machine and on the other side to the bobbin-holder arm.
  • the anchoring points are conceived so that, with the rotation of the bobbin-holder arm being raised or lowered, the counterweighing torque can vary according to a certain law, with a variation in the force applied and/or of its arm: once the application geometry has been determined, the course of the torque applied is established on the basis of the angle of the bobbin-holder arm.
  • Said regulation system for example that according to patent IT 1.231.742 , which regulates the counterweighing force and contact pressure on the basis of the value of the diameter of the growing bobbin, increasing the lifting force of the bobbin in a direct ratio with its diameter.
  • This patent also envisages measuring the diameter on the basis of the ratio between the rotation rates of the bobbin and its driving cylinder.
  • This system is not without drawbacks: for example, the system does not allow the value of the diameter with the bobbin at a standstill to be known; furthermore its indications are misleading during transitory regimes.
  • the diameter to which said prior document refers is the diameter of the deformed bobbin in its resting generatrix on the roll, and not its real diameter.
  • the basic criterion of the counterweighing pressure regulation is that the smaller the diameter, the less the bobbin-holder arm has to unload. If the bobbin is too compressed therefore and is deformed more than necessary, the diameter indicated is even more reduced with respect to the correct value and the bobbin-holder arm unloads even less: the error is magnified.
  • the reference to the mere diameter of the bobbin as the only indicative parameter of its weight also leads to a further significant imprecision, as the winding parameters, the yarn titer, the cross angle of the windings, the bobbin-winding tension and so forth, are not taken into consideration: i.e. it neglects the real density of the bobbin, to which the ratio between the real diameter and the weight of the bobbin should refer.
  • the present invention is defined in the first claim in its most general meaning of a regulation process of the form and density of the bobbin formed by the winding of yarn. Its variants or preferred embodiments are defined in the dependent claims from 2 to 6.
  • the present invention is defined in claim 7 in its meaning of a regulation device of the form and density of the bobbin formed by the winding of yarn. Its variants or preferred embodiments are defined in the dependent claims from 8 to 9.
  • Figure 1 illustrates the scheme - in a front view - of a thread collection unit in an automatic bobbin winder and illustrates the technical problem.
  • Figure 2 illustrates a scheme of a thread collection unit - in a perspective view and cross-section - of a bobbin-winding station, which indicates the most significant organs which intervene in the process and which form the device according to the present invention for the control and regulation of the bobbin formation.
  • Figures 3 to 8 show illustrative diagrams of the weight trends and force exerted as thrusts and counterthrusts exerted on the driving cylinder with the proceeding of the bobbin winding, again calculated with respect to the length.
  • the regulation system of the formation is based on the following logic.
  • the progressive weight of the bobbin P r is indicated on the basis of the length of thread wound, measured directly with the progressive number of revs of the driving cylinder 16 from the beginning of the bobbin, also possibly taking into account the weight of the empty tube 14. This weight is revealed with much more accuracy than what can be indicated by the deformed diameter of the bobbin.
  • the weight of the bobbin is substantially concentrated on the driving cylinder and has a straight trend with respect to the length indicated, as shown in figure 3 .
  • the bobbin-holder arm 11 again during the formation of the bobbin, the bobbin-holder arm 11 does not change its weight P b , but, as the winding proceeds, it changes inclination, passing from an initial ⁇ 0 for the empty tube to a progressively increasing ⁇ value.
  • the ⁇ angles are indicatively represented as the inclination with respect to the horizontal of the joining of the axis of the fulcrum 41 of the bobbin-holder arm 11 with the axis of the bobbin 10.
  • the weight distribution of the bobbin-holder arm between its fulcrum 41 and pressure on the driving cylinder 16 varies: the part of weight P ba of the bobbin-holder arm which is resting on the cylinder 16 decreases with an increase in the ⁇ , as illustrated in figure 4 , which shows the trend of the part of weight P ba resting on the cylinder in relation to the thread length.
  • each bobbin-winding station is equipped with its own control unit which individually governs the winding operation: it is connected with the centralized control unit of the bobbin-winder receiving instructions and exchanging data and information.
  • the control unit of the single bobbin-winding station is equipped with a rev detector/counter 42 of the driving cylinder; as indicated in figure 1 , for example, the rev meter of the driving cylinder 16 is produced with a probe disk which generates impulses in a number proportional to its rotation, indicating the number of impulses progressively received with a receptor 30 and transmitting them, with a line 33, to the control unit of the single bobbin-winding station.
  • a measurer 34 of the rising ⁇ angle of the bobbin-holder arm is associated with this.
  • Rev-counting devices are known in the art and can be produced with various techniques.
  • a rev-counting device can be produced for example as a disk integral with the rotating part, as shown in figure 1 - for example with a disk 29 fitted on the axis of the driving cylinder 16 in figure 1 , or on the bearing of the mandrel of the bobbin-holder arm - having an outer surface with N-S magnetic poles and a Hall effect probe suitably positioned for detecting the passage of said rotating poles.
  • N-S magnetic poles or also the opposite S
  • the sensor With every passage of a N polar expansion (or also the opposite S) the sensor generates an electric impulse, indicated by a sensor 30 and transmitted to the control unit with the line 33.
  • the number of poles arranged on the circumference of the magnetic disk is known, it is possible, by counting the number of impulses, to determine the number of revs effected.
  • the control unit of the bobbin-winding unit is capable, with each indication of the ⁇ angle and progressive revs effected by the cylinder 16, to calculate the weight component (P r + P ba ) which would be totally resting on the driving cylinder 16, without the intervention of the counterweighing device, which corresponds to the sum of the trends of figures 3 and 4 in relation to the length.
  • Figure 5 shows desired trends of the resting force exerted on the driving cylinder with the advancing of the bobbin-winding, calculated with respect to the length.
  • the desired value of the desired resting force is constant at 100%, whereas in some cases, for example for elasticized or low-friction yarns, the first winding layers must be much more compact, so that they do not extend beyond the edges under the pressure of the upper layers which are wound over them.
  • diagram B specifically illustrates these types of yarns, for which after the winding of the first 20-30% of bobbin length, a percentage decrease in said resting force is required, which passes from the initial 100% to lower values.
  • the bobbin-winding parameters are pre-selected for obtaining a certain winding density of the bobbin, experimented during the previous bobbin-winding operations.
  • the desired trend of the contact or resting pressure P c is established at the beginning of the processing operation in the central unit of the bobbin-winder and transmitted thereby to the control units of all the bobbin-winding stations or units.
  • the control unit 48 of the bobbin-winding unit provides a command to a pressure regulating valve 46 which feeds the pneumatic counterweighing device 44.
  • the pneumatic counterweighing device illustratively consists of a simple-effect piston 44 fed by a proportional regulator electrovalve 46 which determines the pressure of the service fluid to be supplied to said piston 44.
  • the value of the ⁇ angle is directly measured on the bobbin-holder arm 11 each time with the angular sensor 34.
  • the value of the ⁇ angle is calculated instead on the basis of the length measured, thus reducing the measuring to the sole detection of the revs progressively effected by the driving cylinder.
  • the ⁇ angle value can be easily estimated by calculation on the basis of the length wound which, when the winding density of the bobbin is known, corresponds to the volume of the wound bobbin. This calculation can be effected by the control units of the machine, for example the control unit 48 of the single bobbin-winding unit.
  • Figure 6 illustratively shows the trend of the ⁇ angle with respect to the horizontal plane in relation to the length for conical bobbins.
  • the detection, calculation and command process for regulating the formation of the bobbin is effected as follows.
  • the central control unit 47 of the machine contains the constructive data - established una tantum - of the bobbin-winding station : for example the weight of the arm P b , the diameter ⁇ c of the driving cylinder, the ratio between the counterweighing thrust Pp and pressure fed with the electrovalve 46.
  • the values of the bobbin-winding parameters are established for obtaining the desired density p, the yarn titer, and also the final weight of the bobbin P f i.e. of the final bobbin length.
  • the control unit of the bobbin-winder 47 - again at the beginning of an operating cycle - sends the established values so far described to the single control units 48, generally consisting of electronic cards, with which the bobbin-winding units forming the machine are equipped.
  • the desired trend D of the contact or resting pressure P c - necessary for obtaining a bobbin having the desired characteristics, specific for the yarn and bobbin being processed, and as always calculated with respect to its progressive length - is established at the beginning of the processing operation in the central unit of the bobbin-winder and transmitted thereby to the control units of all the stations or bobbin-winding units.
  • each single bobbin-winding unit operates autonomously and has a bobbin with its own advance degree, which can differ from one to another, as also its control unit 48 controls its bobbin in relation to its advancement.
  • Said unit 48 receives impulses F corresponding to the revs effected by the driving cylinder, for example generated by a probe disk, measures the metres of thread wound on the basis of the impulses received and calculates the bobbin weight P r .
  • control unit of the bobbin-winding unit proceeds with the direct detection, or calculation on the basis of the length indicated, of the rising ⁇ angle of the bobbin-holder arm.
  • the control unit 48 of the bobbin-winding unit also knows the counterthrust value Pp underway with the counterweighing piston on the basis of the command signal provided in the previous regulation step of the electrovalve 46; it is therefore capable of calculating the P c resulting from the detections effected on the basis of the expression (a) and compares it with the value of P c which is required as a base for the present length parameter on the basis of the trend of the diagram established at the beginning of the bobbin-winding operation.
  • control unit 48 of the bobbin-winding unit calculates the pressure to be supplied to the piston and sends the signal of the new pressure value to be fed to the counterweighing device 44, to the electrovalve 46.
  • Figure 7 illustratively shows the trend of the counterweighing force Pp in relation to the length, wherein the curve A refers to normal yarns and the curve B refers to elasticized yarns.
  • figure 8 illustratively shows the trend of the pressure in bar to be fed with the electrovalve 44.
  • the ⁇ angle value can either be directly detected and also calculated on the basis of the length reached, comparing them with each other.
  • the density of the bobbin being processed differs from the desired density: if the ⁇ angle value detected directly significantly exceeds the calculated value, the bobbin is too soft and must increase its density and vice versa.
  • the cause of this diversity can be sought locally for the single unit - for example an non-calibrated thread-tensioner - or for the whole bobbin-winder - for example variations in the pressure of the service fluid distributed to the thread-tensioner and/or counterweighing devices.
  • a possible remedy can consist in the local correction of the tension supplied to the thread: on the basis of the difference in the ⁇ values, the control unit 48 of the bobbin-winding unit increases or reduces the thread tension to increase or decrease the density of the bobbin ⁇ r to the desired value, processing and sending the relative command signal to the thread-tensioner not indicated in the figure for the sake of simplicity.
  • the value of P c is increased to allow a better entrainment of the bobbin, reducing the slippages between the bobbin 10 and the driving cylinder 16, consequently reducing the counterthrust Pp of the counterweighing device 44, with respect to that of the regime regulation for the length reached.
  • the reduction value of the thrust value (or counterthrust) Pp is within the range of 20% - 60%, and preferably from 25% to 35%.
  • figure 1 indicates, for illustrative but non-limiting purposes, the further components of the device according to the invention for effecting the regulation process of the bobbin formation, the following components are shown in figure 2
  • the process and device for regulating the bobbin formation according to the present invention offer considerable advantages.
  • the weight of the bobbin is measured with great accuracy on the basis of the length effectively wound and the yarn titer with a much higher precision than that allowed by the systems of the known art.
  • the weight with which the bobbin-holder arm rests on the driving cylinder is distributed on the basis of the effective lifting of the arm itself during the processing of the bobbin, detected and/or calculated on the basis of the length.
  • the determination of the advance degree of the bobbin and resting pressures or weights of the bobbin-holder arm and bobbin in formation, as also the determination of their distribution on the driving cylinder, are not influenced by defects in the winding density. These operations can be effected with the bobbin at a standstill or in movement.

Landscapes

  • Winding Filamentary Materials (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Moulding By Coating Moulds (AREA)
  • Cable Accessories (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP07102088A 2006-02-16 2007-02-09 Device and procedure for the regulation of the contact pressure of a winding bobbin Active EP1820764B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000288A ITMI20060288A1 (it) 2006-02-16 2006-02-16 Dispositovo e procedimento per la regolazione della pressione di contatto di una rocca in avvolgimento

Publications (3)

Publication Number Publication Date
EP1820764A2 EP1820764A2 (en) 2007-08-22
EP1820764A3 EP1820764A3 (en) 2009-06-24
EP1820764B1 true EP1820764B1 (en) 2012-08-29

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Application Number Title Priority Date Filing Date
EP07102088A Active EP1820764B1 (en) 2006-02-16 2007-02-09 Device and procedure for the regulation of the contact pressure of a winding bobbin

Country Status (4)

Country Link
US (1) US20070131816A1 (it)
EP (1) EP1820764B1 (it)
CN (1) CN101024462B (it)
IT (1) ITMI20060288A1 (it)

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CN101992971A (zh) * 2010-11-02 2011-03-30 重庆国际复合材料有限公司 络纱机
DE102012023558A1 (de) * 2012-12-01 2014-06-05 Saurer Germany Gmbh & Co. Kg Verfahren zum Regeln der Beschleunigung einer Spulenantriebswalze
DE102013009653A1 (de) * 2013-06-08 2014-12-11 Saurer Germany Gmbh & Co. Kg Verfahren zum Einstellen einer Drehwinkelstellung eines eine Spulenhülse drehbeweglich halternden Spulenrahmens und Spulen herstellende Textilmaschine mit mehreren Spulstellen
DE102017211467B3 (de) * 2017-07-05 2018-07-12 SSM Schärer Schweiter Mettler AG Spulvorrichtung mit Stützwalze und Anpresskraft-Regeleinrichtung sowie Fadenverarbeitungsmaschine
CH715345A1 (de) 2018-09-18 2020-03-31 Ssm Schaerer Schweiter Mettler Ag Verfahren zum Schwenken einer Spule in einer Spulvorrichtung, sowie Spulvorrichtung.
DE102020106121A1 (de) 2020-03-06 2021-09-09 Maschinenfabrik Rieter Ag Verfahren zum Betreiben einer Spinn- oder Spulmaschine sowie Spinn- oder Spulmaschine
CH717382A1 (de) 2020-05-05 2021-11-15 Ssm Schaerer Schweiter Mettler Ag Verfahren und Vorrichtung zum Aufspulen eines Fadens auf eine Spule.
CH717739A1 (de) 2020-08-13 2022-02-15 Ssm Schaerer Schweiter Mettler Ag Spulvorrichtung.
CN113512785A (zh) * 2021-05-11 2021-10-19 苏州汇川控制技术有限公司 电驱动自调节压力控制方法、设备、程序及存储介质
CH719451A1 (de) 2022-02-25 2023-08-31 Ssm Schaerer Schweiter Mettler Ag Schwenkantrieb für eine Spulvorrichtung.
CN114516568B (zh) * 2022-02-28 2024-03-19 北京中丽制机工程技术有限公司 卷装接触压力确定方法及相关设备

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CH573859A5 (it) * 1973-05-28 1976-03-31 Zinser Textilmaschinen Gmbh
CH663402A5 (de) * 1981-12-04 1987-12-15 Loepfe Ag Geb Verfahren zum bestimmen der auf eine kreuzspule mit reibantrieb durch eine nutentrommel aufgewickelten garnlaenge.
DE3335713C2 (de) * 1983-10-01 1986-09-04 Reifenhäuser GmbH & Co Maschinenfabrik, 5210 Troisdorf Vorrichtung zum Aufwickeln von Folienbahnen
DE3734372A1 (de) * 1987-10-10 1989-04-20 Schlafhorst & Co W Schaltbarer und einstellbarer fadenspanner
IT1231742B (it) * 1988-04-11 1991-12-21 Murata Machinery Ltd Dispositivo per regolare la pressione di contatto in una roccatrice
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DE19962296A1 (de) * 1999-12-23 2001-06-28 Schlafhorst & Co W Spulmaschine

Also Published As

Publication number Publication date
CN101024462B (zh) 2012-12-12
EP1820764A2 (en) 2007-08-22
US20070131816A1 (en) 2007-06-14
ITMI20060288A1 (it) 2007-08-17
EP1820764A3 (en) 2009-06-24
CN101024462A (zh) 2007-08-29

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