• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method of managing the drawing of a web or a fiber web in a card apparatus provides a step of changing the web at the minimum speed and a subsequent phase of constant stretching and increasing the speed.
    公开号:CH709519B1
    申请号:CH01156/15
    申请日:2014-02-06
    公开日:2018-11-15
    发明作者:Mascheretti C/O Marzoli Machines Textile Srl Mario；Giavarini C/O Marzoli Machines Textile Srl Matteo
    申请人:Marzoli Machines Textile Srl；
    IPC主号:
    专利说明:

    Description [0001] The object of the present invention is a method for managing the stretching of a web or a web of fiber between a rotatable upstream drawing member and a rotatable downstream drawing member, located in the unloading or feeding area of an apparatus card. Furthermore, an object of the present invention is a group for managing the ironing of the card apparatus for carrying out the management method.
    [0002] In a preparation line for spinning, the fiber, for example in flakes, is first picked up from the bales, subjected to cleaning and opening operations and sent to the carding.
    [0003] Carding, as is known, is an operation of primary importance, since the fiber fed in flakes is further cleaned and parallelized, coming out in the form of a tape to be sent for subsequent processing.
    [0004] A carding machine generally comprises an introduction cylinder or briseur, a drum and an unloading cylinder or doffer. The introduction cylinder is arranged in a feeding area upstream of the drum, while the discharge cylinder is arranged in a discharge area downstream of the drum. The fiber to be carded passes from the introduction cylinder to the drum, while the carded fiber passes from the drum to the discharge cylinder. From this it comes out in the form of a veil, further compacted and stretched and crammed into a ribbon in a vase. The tape then continues to further processing.
    [0005] Generally, the web coming out of the unloading cylinder is subjected to ironing operations, to obtain a ribbon having a predefined title, suitable for subsequent processing. These operations generally take place by passing the web through pairs of calenders having different rotation speeds.
    [0006] During the operation of a carding machine, the cylinder speed is not constant, for different reasons; for example, it is often necessary to vary the speed to adjust the height of the veil coming out of the discharge cylinder or according to the type of fiber being processed or simply due to the different operating phases of the machine.
    [0007] For example, when the process is started, a threading step occurs, during which the fiber begins to be fed to the drum and begins to come out in the form of a veil from the discharge cylinder; the threading phase is conducted at a particularly low speed. A starting phase generally follows, at a higher speed. Finally, a processing phase takes place, carried out at an even higher speed and in accordance with operating parameters that can ensure the desired quality and / or production of the belt.
    [0008] For the management of ironing as a function of speed, a method of ironing management is known, for example from document GB-A-2 273 508.
    [0009] However, it has been found that the methods for managing the pressing of the prior art have numerous drawbacks. For example, it has been found that the increase in stretching at the same time as the speed considerably increases the risk of cutting the web or of the web and often involves obtaining a tape of unsatisfactory quality or, due to the continuous interruptions in processing , inadequate production.
    [0010] The object of the present invention is to overcome the drawbacks of the known art and at the same time satisfy the requirements mentioned above.
    [0011] This object is achieved by a method for managing the ironing carried out according to claim 1. Furthermore, this object is achieved by an ironing management unit according to claim 9.
    [0012] The advantages of the method and of the management unit according to the present invention will be evident from the description given below, given by way of non-limiting example, in accordance with the attached figures, in which: fig. 1 shows a diagram of a card apparatus comprising a silo group, a carding machine and a coiler unit; fig. 2 shows a diagram of the unloading area of the card apparatus of fig. 1, in which the denomination of the ironers is highlighted; fig. 3 shows a diagram of the unloading area of the card apparatus of fig. 1, in which an ironing management group is highlighted; fig. 4 represents a graph showing the trend of an upstream speed, a downstream speed and a draft according to the method of management of the present invention; and fig. 5 shows an ironing device of the carding machine for carrying out the ironing method according to the present invention.
    [0013] According to the accompanying figures, a card apparatus 1 comprises a silo group 2 provided with a collection compartment 4 for the fiber in flakes, generally coming from the battery machines.
    [0014] Preferably, the silo group 2 comprises a pair of counter-rotating extraction cylinders 6, 8, cooperating with each other for extracting the fiber in flakes from the collection compartment 4.
    [0015] The card apparatus 1 further comprises a supply compartment 10, fed by the extraction cylinders 6, 8, and a feeding cylinder 12, arranged at the end of the supply compartment 10.
    [0016] Furthermore, the carding machine comprises an introduction cylinder 14 or briseur, a drum 16 and an unloading cylinder 18 or doffer.
    [0017] The fiber extracted from the feeding compartment 10 by the feeding cylinder 12 is brought to the introduction cylinder 14 and from this to the drum 16, where it is carded.
    [0018] The carded fiber moves from the drum 16 to the discharge cylinder 18, placed in a discharge area downstream of the drum 16.
    [0019] Furthermore, in the unloading area, the carding machine comprises a stripping cylinder 20 and a pair of coupled pressure rollers 22, 24. The stripping cylinder 20 operates on the web of fiber carried by the discharge cylinder 18 so as to detach it therefrom, directing it towards the pair of pressure calenders 22, 24, between which it generally undergoes a thinning of the thickness.
    [0020] Furthermore, preferably, the carding machine comprises, in the unloading area, a compacting device 26, for example a belt device, which compacts the fiber web transversely, until now substantially as wide as the width of the drum, obtaining a ribbon in the form of a cord.
    [0021] Furthermore, the carding machine comprises, in the unloading area, a funnel 28 and a pair of exit calenders 30, 32, downstream of the funnel 28. The belt first passes through the funnel 28 and then passes between the calenders of exit 30, 32.
    [0022] In addition, the card apparatus 1 comprises a coiler unit 40 for collecting the tape coming out of the carding machine, arranged in the unloading area.
    [0023] Preferably, the coiler unit 40 comprises some rollers 42 for guiding the outgoing belt, a pair of inlet calenders 44, 46, and a vessel 48, usually rotatable. The strip coming out of the output calenders 30, 32 is suitably deviated towards the rollers 42 and passed through the inlet calenders 44, 46, to then be deposited in the revolving vessel 48.
    [0024] The amount of ironing is defined by a parameter called "draft", defined by the ratio between the speed of rotation of a downstream member, for example a cylinder, a pair of calenders or the belt of the compacting device, and the speed of rotation of a member upstream of the previous one, for example a cylinder, a pair of calenders or the belt of the compacting device.
    [0025] In the unloading area of the carding machine, it is therefore possible to define multiple drafts, according to the stretching members taken into consideration.
    [0026] For example (fig. 2), the drawing S1 between the stripping cylinder 20 and the unloading cylinder 18 is defined as the ratio between the rotation speed V (20) of the stripping cylinder 20 and the rotation speed V (18 ) of the drain cylinder 18; in particular S1 = V (20) / V (18).
    [0027] Similarly, the drawing S2 is defined between the pair of pressure rollers 22, 24 and the stripping cylinder 20; the drawing S3 between the compacting device 26 and the pair of pressure rollers 22, 24; the drawing S4 between the pair of output calenders 30, 32 and the compacting device 26; the draft S5 between the pair of inlet calenders 44, 46 of the coiler unit 40 and the pair of output calenders 30, 32 of the carding machine.
    [0028] With reference to fig. 4, for clarity of description, is the rotation speed of an upstream stretching member (for example, the unloading cylinder 18, the stripping cylinder 20, the pair of pressure calenders 22, 24, the compacting device 26 , the pair of output calenders 30, 32), and Vb the speed of rotation of a downstream member (for example, the stripping cylinder 20, the pair of pressure calenders 22, 24, the compacting device 26, the pair of output calenders 30, 32, the pair of inlet calenders 44, 46) and both S between them (S = Vb / Va).
    [0029] According to the invention, in an initial preparation phase, for example at the starting of the carding machine (instant tO), the speed upstream Va assumes a preparation value Va '; between upstream and downstream there is a draft S equal to a preparation value or lower S '; therefore the downstream speed Vb assumes a preparation value Vb '. This state remains up to an instant of preparation end t1.
    [0030] In an ironing change phase, subsequent to the preparation step, the stretching increases, for example with a ramping progression, up to a working value or above S ", reached in an instant at the end of the change trough t2; in said step-in phase changeover, the upstream speed Va remains constant and equal to the set-up value Va ', consequently the downstream speed Vb increases, substantially following the trend of the increase of the stretching S, up to an intermediate value Vb * = S "x Go.
    [0031] In a possible intermediate phase, following the step of changing the stretch, the upstream speed Va ', the stretching S "and the downstream speed Vb * remain constant, up to an instant of the end of the intermediate stage t3.
    [0032] In a pre-processing step, following the intermediate stage or the step of changing the stretch, the upstream speed should be increased, for example with a ramping trend, up to a processing value Va "in an instant of end before - machining t4; the ironing S remains constant at the machining value S "; consequently, the downstream speed Vb increases, substantially following the speed trend upstream Va, up to a processing value Vb "= Va" x S ".
    [0033] Advantageously, the stretching increases only when the upstream speed is lower (the minimum), while it remains constant when the upstream speed increases; this allows, among other things, to overcome the drawbacks mentioned with reference to the known art.
    [0034] To carry out the ironing method described above, the card apparatus comprises a management unit 100, comprising a management device 50 comprising, preferably, a PLC or a microprocessor.
    [0035] Preferably, the management group 100 comprises an input interface 52, operatively connected to said management device 50, suitable for manually entering the operating parameters of the card apparatus or for entering commands, for example by means of a keyboard or touchscreen.
    [0036] According to one embodiment, the management group 100 comprises a storage unit 54, operatively connected to the management device 50, for the permanent storage of operating parameters of the card apparatus.
    [0037] For example, said storage unit 54 has in memory the drafting value S 'and / or the processing value of the draft S "and / or the preparation speed value Va' and / or the value of machining speed Va ".
    [0038] According to a still further embodiment, the management unit 100 comprises at least one sensor 56, operatively connected to the management device 50, for detecting a working condition of the card apparatus, for example for detecting the presence of the belt in a predefined position of the unloading zone or for detecting the rotation speed of a cylinder or a calender or of the compaction device of the unloading area.
    [0039] For example, the sensor 56 is suitable for detecting the presence of the belt at the pair of inlet calenders 44, 46 of the coiler unit.
    [0040] According to a still further embodiment, the management group 100 comprises a timer 58, operatively connected to the management device 50.
    [0041] Moreover, the card apparatus 1 comprises one or more separate electric motors 60 which can be controlled at speed, each dedicated to the movement of one or more of the unloading zone stretching members.
    [0042] Said motors 60 are operatively connected to the management device 50 and controllable in speed by it.
    [0043] Accordingly, according to an embodiment of the invention, the values of the preparation stretch S 'and / or of the working stretch S "and / or of the preparation speed Va' and / or of the processing speed Va" are entered manually by an operator via the input means 52.
    [0044] Alternatively, these values are supplied to the management device 50 by the storage unit 54.
    [0045] According to a preferred embodiment of the invention, the increase in the stretch from the preparation value S 'to the processing value S "begins and proceeds by intervention of the operator through the input of a command in the input means 52 .
    [0046] According to a further embodiment of the invention, the increase in stretching starts and proceeds automatically, for example upon receipt by the management device 50 of an end-of-preparation signal, for example received by the timer 58 or on the base of sensor detection 56.
    [0047] According to an embodiment of the invention, the strip coming out of the pair of inlet calenders 44, 46 is conveyed into the rotatable vessel 48 only if the draft S has assumed the working value S "or if the speed downstream Vb has assumed the processing value Vb ".
    [0048] Advantageously, this allows only the belt having the desired stretching or qualitative characteristics to be collected in the rotatable vessel.
    [0049] According to a preferred embodiment (Fig. 5), the carding machine comprises an ironing device 200, arranged in the unloading area, for example downstream of the funnel 28 and / or of the compacting device 26 and upstream of the pair of inlet calenders 44, 46 of the coiler group 40.
    [0050] Said ironing device 200 comprises at least two pairs of ironing calenders, for example three pairs in succession 202, 204; 206, 208; 210, 219.
    [0051] Similarly to what has been described above, the method of ironing management is applicable to the stretching device 200, and in particular to one or more of the pairs of ironing calenders.
    [0052] In particular, a draft Z1 can be defined for the stretching device 200 as a ratio between the speed of rotation of the second pair of drawing calenders 206, 208 and the speed of rotation of the third pair of drawing calenders 202, 204; in other words, Z1 = V (206, 208) / V (202, 204); a draft Z2 as the ratio between the rotation speed of the first pair of drawing calenders 210, 212 and the rotation speed of the second pair of drawing calenders 206, 208; in other words, Z2 = V (210, 212) / V (206, 208).
    [0053] Moreover, taking into account all the stretching members operating in the unloading area and arranged in succession, or the groups of such members, an initial stretching member and a final stretching member are identified, between which one is arranged or more intermediate ironing members.
    [0054] A total stretching (St) is defined between the initial stretching member and the final stretching member, while intermediate stretching values Si, Si + 1, ..., Sn are defined between the intermediate members.
    [0055] The final drawing value St is identified by the product of the intermediate drawing values, according to the formula St = Si x Si + 1 x ... x Sn.
    [0056] In one embodiment of the management method according to the invention, at least one of said intermediate drawing values Si has been automatically identified by the management group 100, for example by the management device 50, and consequently imposed on the respective organs of intermediate ironing.
    [0057] For example, said intermediate stretching values are determined or calculated by the management group on the basis of the technological limits of the stretching which can be carried out between the intermediate stretching members concerned or on the basis of optimal experimental values stored, for example in the storage unit 54.
    [0058] Innovatively, the method of ironing management according to the present invention allows to overcome the drawbacks of the known art, and in particular allows to considerably reduce the risk of cutting the web or web.
    [0059] According to a variant embodiment, the management method described above is applicable in the feeding area of the carding machine, for example between the extraction cylinders 6, 8 and the feeding cylinder 12.
    权利要求:
    Claims (9)
    [1]
    claims
    1. Method of managing the stretching of a fiber web or a web of fiber between a rotatable upstream ironing member (18; 20; 22, 24; 26; 30, 32; 202, 204; 206, 208; 210, 212 ; 44, 46) and a rotatable ironing device downstream, located in the unloading area of a carding apparatus (1), in which - in an initial preparation phase, the rotation speed of the upstream stretching member (Va ) assumes a preparation value (Va '), between the upright stretching member and the downstream stretching member there is a draft (S) equal to a lower value (S) and the rotation speed of the downstream pressing (Vb) takes on a lower value (Vb '); - in a step of changing the ironing, the stretching between the lower value (S ') and a higher value (S ") increases, keeping the rotation speed of the stretching member upstream (Va') constant and varying the rotation speed of the ironing member downstream (Vb), and subsequently - in a constant-stretching step, the speed of rotation of the stretching member upstream and of the stretching member downstream increases between the respective lower value (Va ', Vb ') and a higher value (Va ", Vb") while the ironing remains constant.
    [2]
    2. Method according to claim 1, wherein an intermediate step is carried out between the step of changing the stretch and the step of constant stretching, in which the speed of rotation of the stretching member upstream and of the stretching member downstream remains constant and equal to the lower value and the draft value remains constant and equal to the upper value.
    [3]
    3. Method according to any one of the preceding claims, in which the belt is conveyed into a vessel (48) of a coiler unit (40) of the card apparatus (1) only when the value of the draft is equal to the upper value or the speed of rotation of the upstream stretching member and of the downstream stretching member is equal to the upper value.
    [4]
    4. Method according to any one of the preceding claims, in which the lower and / or upper value of the stretching is / or the lower and / or higher value of the rotation speed of the upstream stretching member and of the downstream stretching member are entered manually by an operator in a management unit (100) of the card apparatus (1) or in which the lower and / or upper value of the draft and / or the lower and / or higher value of the rotation speed of the organ for ironing upstream and for the downstream stretching member are supplied to a management device (50) by a storage unit (54).
    [5]
    5. Method according to any one of the preceding claims, in which the increase in the stretch from the value lower than the upper value begins by an operator.
    [6]
    6. A method according to any one of Claims 1 to 4, in which the increase in the stretch from the lower value to the upper value starts automatically, for example by means of a signal from a timer (58) or a sensor (56).
    [7]
    7. Method according to any one of the preceding claims, in which - between an initial ironing member and a final ironing member a total draft (St) is defined; and - intermediate stretching members are provided between said initial ironing member and said final ironing member, so that the final drawing value is defined as a product of the intermediate drawing values; and in which - at least one of said intermediate stretching values (Si) is automatically identified by a management group (100).
    [8]
    8. Management unit (100) for performing a management method according to claim 1 containing the constituent parts mentioned in the claim and a management device (50) adapted to control electric motors (60).
    [9]
    9. Method for managing the drawing of a fiber web between a rotatable upstream drawing member (6, 8) and a rotatable downstream drawing member (12), placed in the feeding area of a card apparatus (1), wherein - in an initial preparation step, the rotation speed of the upstream stretching member (Va) assumes a preparation value (Va '), between the upstream stretching member and the downstream stretching member there is a draft (S) equal to a lower value (S ') and the rotation speed of the downstream stretching member (Vb) assumes a lower value (Vb'); - in a step of changing the ironing, the stretching between the lower value (S ') and a higher value (S ") increases, keeping the rotation speed of the stretching member upstream (Va') constant and varying the rotation speed of the ironing member downstream (Vb), and subsequently - in a constant-stretching step, the speed of rotation of the stretching member upstream and of the stretching member downstream increases between the respective lower value (Va ', Vb ') and a higher value (Va ", Vb") while the ironing remains constant.
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    同族专利:
    公开号 | 公开日
    ITBS20130013A1|2014-08-15|
    CN104919098A|2015-09-16|
    DE112014000816B4|2020-07-02|
    BR112015017565A2|2017-07-11|
    DE112014000816T5|2015-10-29|
    CN104919098B|2017-04-12|
    WO2014125401A1|2014-08-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3982301A|1975-01-29|1976-09-28|Lawrence Llach|Variable drive mechanism for carding machine|
    DE2944428C2|1979-11-03|1984-08-30|Trützschler GmbH & Co KG, 4050 Mönchengladbach|Device for production control and sliver regulation of a card|
    DE3703450A1|1986-05-24|1987-11-26|Truetzschler & Co|METHOD AND DEVICE FOR COMPARISONING THE RIBBON WITH A CARD|
    DE4332329B4|1992-11-07|2005-10-20|Truetzschler Gmbh & Co Kg|Device on a card for textile fibers, z. B. cotton, chemical fibers u. Like., For production control|
    US6581248B1|1997-01-23|2003-06-24|Maschinenfabrik Rieter Ag|Carding machine with drawing rollers at the outlet|
    IT1302707B1|1998-10-20|2000-09-29|Marzoli & C Spa|DEVICE AND PROCESS PERFECTED FOR THE COLLECTION AND IRONING OF THE FROST IN THE OUTLET GROUP OF A CARD.|
    DE10161522A1|2001-12-14|2003-06-18|Rieter Ag Maschf|Spinning machine has controlled drive for drawing unit cylinders, using frequency converter set by machine control, together with start unit at computer to vary predraft action|
    DE102004004433A1|2004-01-28|2005-08-18|Trützschler GmbH & Co KG|Device on a spinning machine, in particular carding machine, cleaner o. The like., For mounting a clothing on a roller|
    DE102004007143B4|2004-02-12|2012-04-05|Rieter Ingolstadt Gmbh|Method and device for drawing at least one sliver|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    IT000013A|ITBS20130013A1|2013-02-14|2013-02-14|METHOD OF MANAGEMENT OF THE STRETCHING OF A FIBER RIBBON IN A CARDA APPARATUS|
    PCT/IB2014/058833|WO2014125401A1|2013-02-14|2014-02-06|Method of controlling the drafting of a fibre web in a card apparatus|
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