CONTINUOUS WINDING MACHINE AND METHOD FOR DIVING LARGE DIAMETER WRENCH ROLLERS IN NUCLEI DE
SMALL DIAMETER
BACKGROUND OF THE INVENTION
This invention relates to a winding method, and to a continuous drum-type surface winder, particularly adapted for winding slit band material on individual core segments carried on a common number arrow and more particularly to a method and winder adapted to wind a slit band in individual rolls of dc substantial diameter, such as 1524 cm or greater, on relatively small and wide diameter core arrows. In the high-quality roll winding that can be shipped, of large diameter band material, including films, non-woven materials, paper, mixed-material board material on cores, the wound-slit operation is preferably placed in line with the process formed and band converter. Said winding arrangement continues to reduce production and waste costs, and allows rapid; identification of process control problems The continuous winding requires that the handling of complete rolls, is transfer of individual slit bands at high velocity onto corresponding core segments, and the initiation of
Winding process on new core segments, all sear. managed moderately and at an online speed. The continuous winding of large diameter slit rollers on wide machines has presented major problems. A particular problem arises from the fact that a small, long diameter core arrow flexes on its own weight, and exhibits critical speed limitations during acceleration and before the transfer of the band. These critical speed limitations are mainly the result of the deflection of the core band that gives as a result-harmonic and dynamic imbalances. Said critical speed conditions may be vibrations that interfere with the web transfer, and may result in an appropriate start c defective, and a start where the rolls lack sufficient hardness. Also, deflection of the arrow can cause roll quality problems when large diameter recess rollers are wound. The problems identified above are in particular acute when the arrows of numbers are too small, such as, for example, arrows for supporting cores with an internal diameter of 7.62 cm across a wide width which may exceed 508 cm, and for devanat Roller diameters that can exceed 152.4 cm. There is a need for a continuous winder and a method for operating a winder, where large diameter slit rollers are wound to wide machine widths in a continuous operation, where the deflection of the core arrow and the conditions of critical speed, and where the roll group in development is controlled for density throughout the winding process.
COMPENDIUM OF THE INVENTION
This invention provides a continuous surface type drum winder and a method for winding slit belts on individual core segments of broadband materials at high speeds to large diameter rolls on small diameter cores. In particular, a winder and a winding method provide the transfer of in-line speed slit bands on cores supported on a long and very thin core arrow, as previously described. A first driven or primary drum is provided with a urged primary pressure roller that is rotated-mounted on support arms. These arms are pivotally mounted on primary arms that rotate about or in relation to the drum axis. The primary arms are further provided with a slot, pressure or other means through which the ends of a core shaft are supported or guided in the initial stages of the winding, so that the core shaft is sandwiched between the core roller primary pressure driven e
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primary drum driven, thus eliminating resonances and deflections of the core arrow that cause critical speed limitations and wrinkling in the transfer and start of the belt The construction of roller segments, ie the individual rolls, on the core arrow starts, while the core arrow is supported on the primary arms. The geometry of the arms, the primary or main drum, and the pressure roller is such that the core arrow is supported during web transfer, and during the initial construction of the roller, in a way that ensures that the arrow of core and cores - are straight or parallel with the surface of the primary drum, and a good ignition or start is obtained through an appropriate load by the primary pressure roller. Also, during the roll development phase, the primary arms are programmed to move from a roller changing position to a roller transfer position, where the core arrow and the rollers therein are transferred to and from support arms referred to herein as secondary support arms. The secondary support arms are associated with a support drum that can be moved on the secondary arms and in relation to the secondary arms, in order to remain in a support coupling with the rollers constructed, while the rollers continue in all moment being coupled with the main winding drum. In addition, the primary pressure roller also continues in coupling with
winding rolls, so that the winding of the rolls continues on a two-drum winder where both drums are driven, either in a speed or twist mode, as desired, and clamped through a roller guided guide. The primary pressure roller is released after the weight of the winding rollers provides sufficient holding load with the support drum The changing diameter of the roller is known at all times through a reading of angle transducers incorporated in the arm of pivot for the primary pressure roller and by the position of the secondary support drum on the secondary arms. The loading of the primary pressure roller and the secondary support drum load can be controlled through the diameter of the roller, as well as the weight of the roller to provide roll density and deflection control. The slow movement of the winding roller group, when carried by the primary arms to the working position to the secondary arms or supported, results in a small change in the length of the band and, therefore, a small change in the web tension, and allows the diameter winding of the total roller group, while the screw group is held partly on the main drum to help minimize the deflection of the winding roller. The winding group, at the beginning of the winding after the band transfer, is sandwiched between the main drum
and the primary pressure roller driven, and the core arrow is retained in defined grooves in the primary arms. The secondary arms, after the complete roller group is discharged, return to a starting position that allows the primary arms, through a total rotation of approximately 60 degrees, to supply the partially wound core attachment to the secondary arms, while the contact is maintained by the pressure roller. The winding roll develops until it initiates a contact with the secondary compensating support drum that is being driven at the line speed. This three-roller or three-point coupling condition is maintained through a larger portion of the Ios construction. -roller slit rollers, while the secondary arms and support drum cooperate with the primary drum to carry the load of the building rollers and maintain the core arrow in a straight line condition. After obtaining the roller group with a sufficient size that a guide roller is no longer required, the primary arms and the associated pressure roller are completely retracted to allow the placement therein of a new core arrow cor cores, the ends of said arrow are retained in a groove er, the primary arms and supported on a fixed cam surface. A transfer shoe type cutting system is pivotally mounted on a common axis with the axis of the main drum, and rotatably moves below the running belt, and rests at a point upstream of the roller and between the new cores on the core shaft and on the developing roller. The primary pressure roller is lowered onto the new core shaft. The pressure roller goes to the speed mode to accelerate the new rollers and the core arrow. The primary arms then rotate approximately 5 degrees, so that the core arrow moves out of the cam surface and into the arm slots, where the cores reach the line speed by a running coupling with the band on e drum in a position just before (upstream) of the point er where the band is lifted from the drum through the transfer shoe. An adhesive spray applicator is mounted between the primary arms and has individual spray heads that operate to spray the web surfaces with adhesive upstream of the core arrow. The primary arms then rotate another 5o approximately, which activates the spraying of the adhesive At the same time, a precision cutting blade comes from the shoe towards the slit belts and encloses the belts The tension and momentum of the belt of the rollers of construction pull the bands through the blade thus causing a clean straight line cut, with the adhesive causing the transfer of the individual bands on the new cores. At the same time the adhesive on the ends of cut causes the ends to be joined together. The surfaces of the complete rollers:
respective. Then, the secondary arms index the fully wound roller group away from the primary drum and into a braking position, where the braking torque is applied regeneratively through the secondary drum to stop the rotation of the roller. The winding roller group then moves to a discharge position. At the same time, the shoe-type band cutting system is pivoted by its arms to a downward rest position, and the new one of fixing the core with the bands attached, continues to be wound, retained in the primary arms and loaded against the primary drum through the primary boom pressure roller. In this walled position the core arrow is kept substantially free of deflection, providing a hard winding start of the individual slit band sections on the respective cores, with the hardness being controlled through the torque and pressure supplied by the primary pressure roller The natural deflection of the core shaft is eliminated or controlled so that otherwise it may cause the belt to crumple at the beginning and this may cause critical speed problems. The apparatus and method of this invention provide certain features that are believed to be unique to windings of this type. These include the elimination of or control of critical speed problems and deflection problems.
of related core arrows, common to the continuous winding of wide and / or large slit rollers. The sandwich appearance of the new arrow with cores between a main driven winding drum and a pressure roller driven in and after the roller change eliminates the critical velocity and natural deflection that causes wrinkling at the beginning of the winding. The transfer shoe system with a discharge blade ensures a clean straight transfer without considering the speed of the belt. The driven primary boom pressure roller ensures a good start and an appropriate profile of hardness through programmed grip and programmed torque control as a function of the diameter of the winding roller through a position sensor on the pivot of the driven primary pressure roller A slow and controlled movement of the winding roller group of approximately -20 ° from a vertical centerline through the main drum to a winding position of approximately + 30 ° provides excellent roll support and causes a very small change in the length of the band and therefore, a very small change in the tension of the band, and allows the winding of the full roller group diameter although supported on the primary or primary drum to help reduce the minimum deflection of the core shaft and winding roller.
'The driven support drum supports the winding roller group in the winding position also to help minimize the deflection of the winding roller. The driven support drum ensures that the construction rolls have an appropriate profile of density to through the programming of the grip pressure and torque control of the drive. This system approximates the well-known two-drum winding system, used extensively in the industry to stop / initiate winding groove formation operations. The driven support drum is also used to support and stop the winding group after the transfer providing regenerative braking. The primary support arms with the pressure roller provide security and ensure that the winding roller group is contained within and on the working surfaces of the two winding reels and prevent lateral movement of the winding roller group until the group is driven c driven towards the secondary arms. Arrow-sensing devices are incorporated into the secondary support arm to prevent excessive loading of the core shaft from excessive loading of the support drum. The secondary arms are used to securely secure the winding roller group contained within the arms. two winding drums. They are also used to prevent movement
side of the winding roller group and to eject the finished roller group. A positional device is incorporated in the ur pivot of the secondary arm to compensate for the arm assembly through the support base cylinders to avoid excessive loading of the core shaft through the support arms that can cause the Accordingly, it is an important object of the invention to provide a continuous two-drum surface type winder and a method, wherein a core spindle is supported throughout the winding process, from the transfer of band, start and end, in such a way as to eliminate bending and deflection, thus reducing critical speed problems. A further object of the invention is the provision of a two-drum type winder, wherein a roller arrangement can operate to provide a three-point winding control through a main portion of the winding of a slit band on segments of Individual readings, is a core arrow Another object of the invention is the provision of a winder, as presented above, wherein a secondary winding drum is controlled, on the secondary arms so as to support the weight of the rollers of construction on the core arrow so that the core arrow can remain relatively straight through the winding process
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Other objects and advantages of the invention will be apparent from the following descriptions and from the foregoing, and from the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a partially separated perspective view of a continuous winder in accordance with this invention; Figure 2 is a partially cut away end view of the winder of Figure 1, facing the machine from the run side, with some of the parts moved relative to its position in Figure 1 for purposes of illustration; Figure 3 is a side view of the winder of Figure 2; Figures 4-9 respectively are sequential views. showing the operation and method of the winder, where: Figure 4 shows the new core arrow in place, the blade shoe is indexed to the roller change position and the primary pressure roller moves to the position of acceleration of the nucleus; Figure 5 illustrates the primary arms moved to a position at -25 °, allowing the core to fall against the drum causes acceleration of the core to make contact with the band on the primary drum, ready to move to a roll change position , where the primary arms rotate to a position
at -20 °, causing the adhesive to be sprayed onto the web a spring loaded blade is actuated by transferring on the new core; Figure 6 shows the winding roller that is transferred to a braking position on the secondary arms and then stopped by the associated support drum, while the blade shoe indexes to a fixed position, Figure 7 shows the primary arms after of sei slowly indexed to a position of + 30 °, the closing assembly on the secondary arm retracts allowing the winding roller to rise through a lifting table towards ur arrow drive and register the position, as shown allowing the support arms to be indexed counter-clockwise of Figure 4 to a transfer position (Figure 8), stopping in such a position in ur proximity switch sensing the core arrow; Figure 8 shows the support arms returning to the transfer position, ready to receive the number arrow from the primary arms, where the rollers continue to be constructed under balanced conditions and at a given diameter the primary pressure roller will be released and the The support drum on the support arms will increase the pressure for the desired hardness, while the primary arms indexed to an arrow loading position are shown in Figure 9; and Figure 9 illustrates the primary arms in the loading position
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of core arrow at -30 ° resting on the cam surface as the construction rollers are supported between the drum and the driven support roller.
DESCRIPTION OF THE PREFERRED MODALITIES
Referring to the drawings, which represent a preferred embodiment of the invention, a continuous winder particularly designed and constructed for winding, on small cores, a slit band on individual large diameter rolls, is generally illustrated at 10 in FIGS. 10 includes an apparatus supported on a frame 12 including a first side frame 13 and a second separate side frame 14 A rectangular tubular cross member 15 extends between the frames 13 and 14 adjacent to the running side of the winder. The direction of the process is indicated by I; arrow 17 in Figure 1. The winder can wind on core arrows diameter sizes as small as 7 62 cm or smaller widths that can exceed 508 crn or more The diameter of the individual roller segments wound on the arrow of core 20 may exceed 152.4 cm. The winder 10 is intended to be used in an in-line procedure, which may have an upstream router and which may have a smoothing roller, similar to the roller
straightener 16 positioned at the inlet end of the winder 10 as shown in Figures 1 and 2. This apparatus may include process tension control isolation rollers leading the slit belts towards the winder, for winding on cores (not shown) supported on a core arrow 20. A typical core arrow 20 as used in this invention is shown in elevation in Figure 2. Also, the core arrow removal and load mechanisms can be used , as is well known in the art. A first winding or primary drum 22 is rotatably mounted between the side frames 13 and 14, and is driven by a floor mounted electric drive, not shown. A pair of primary arms 24, 22 is pivotally mounted on the side frames around of a pivot shaft concentric with the rotational axis of the drum 22, and are positioned at each respective transverse end of the drum. The primary arms, each one is formed with depressions or grooves 28 for receiving the core arrow in general radially in extension, which receives at the ends of the core arrow 2C during the initial winding steps. By using the vertical radiating line through the center of the slot 28 as the neutral position the arms 24, and 25 can be rotated by the cylinders 26 around the axis of the main winding drum 22 from a position of about -30 °. , as shown in Figure 4 to a position of approximately + 30 °, as shown in Figure 8
A fixed cam plate 29 is provided on each of the side frame members 13 and 14. Each cam plate 29 has a sloping surface 31 facing forward that is inclined at a substantially parallel angle toward the slot 28 in a about -25 ° position of the arms, and is further provided with an upper horizontal core arrow support cam surface 32, at least a portion of which is exposed when the primary arms 22 is rotated to a position of approximately -30 °. The primary arms 24 and 25 in turn support a pressurized primary boom pressure roller 30. The pressure roller 30 is supported on pressure roller supporting arms 33 which are pivoted on the primary arms 24. The pivot 35 incorporates an arrow angle encoder, so that the diameter of the building roller on the drum 22 can be determined. The primary pressure roller is covered with silicone rubber or is covered with plasma release. The positions of the arms 33 and the supported primary roller 30 are controlled through actuators or cylinders 36, on each side of the winder. The cylinders 36 can move the pressure roller 30 from a raised position, as shown in Figures 2 and 3, to a fully lowered position in engagement with the cores on the core shaft 20 as shown, for example, in the Figure 1 and 6 The roller 30 is driven by a drive motor 37 and a band 38.
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Also, as best shown in Figures 3 and 5, a transfer shoe and band cutter 40 extends transversely adjacent the outer surface of the drum 22 between the frames 13 and 14 and rotates about the axis in common with the axis of the drum 22. The shoe 40 can move on its support arms 41 between a reduced retracted position, as shown in Figure 3 towards a rotated operative position, as shown in Figures 1, 4 and 5, and carries with it a band cutting blade 42, which can be extended above the shoe and towards the path of the bands passing over the drum 22 to cut the bands. The shoe 40 provides an upper curved surface that is designed to be operated with the band running on the surface. The arms 41 supporting the shoes are connected through a common arrow to a drive motor 39, Figure 1, through which the shoe 40 can be placed between its reduced operating position nc, as shown in the online form of Figure 3 towards its raised operative position including the cutting blade as shown in Figures 4 and 5. A spray bar in the shape of a transverse member 45 supports a plurality of adhesive spray nozzles 46 that can be placed in tight form. The spray nozzles are connected to a source of adhesive and can be aligned so that only mainly the web segments are sprayed with adhesive to transfer a new core.
A pair of support arms 50, 51, referred to herein as secondary arms, is pivotally mounted to the run ends of the side beaters 13 and 14. Ur encoder 50A is incorporated in the pivot support to read the angular position. of the support arms. The secondary arms 50 and 51 have a number of functions. First, they provide a means through which the core arrow 20 is supported during a main function of the winding. The arms 50, 51 also provide the support for a drum of
The driven support, hereinabove referred to as a secondary winding drum 52. The drum 52 is mounted on secondary support plates 53 and 54, which can be moved vertically on pairs of guide rails 55 supported on the internal confronting surfaces. the respective rotating arms 50 and
51. The secondary plates 53 and 54 in effect form a movable carriage coupled through a transverse bastidoi member 71 and run on parallel rails 55 (Figure 3) through which the secondary drum 52 can be moved. vertically between a reduced position for example in the
Figures 1 and 2, at intermediate and raised positions as shown respectively in Figures 8 and 9. The movement and position of supporting drum 52 are controlled by a pair of cylinders 58 and 59 extending between arms 50 and 51 and joining in a clamp 60 with the secondary roller support plates 53 and
25 54. Secondary support plates 53 and 54 move er
"° iufc.i i [?? rí - '" fe- * - * - •• »- ~ • < -s ^ * - ** ° ~ - > ~ ----- 1- matching through a rack-and-pinion mechanism 56 and 56A, and a rotating interconnection shaft 61 coupling e 'rotational movement of pinion gears 56A together with zippers 56 associated with each of the plates 53 and 54. thus ensuring a uniform movement of the drum 52 by the motivating cylinders 58, 59. The rotational movement of the secondary arms, by themselves, is controlled by the cylinders 63 and 64, on each of one pivotally anchored in one of the side frames 13, 14 with an actuator bar extending towards a clamp 66 attached to one of the arms 50, 51, respectively. The secondary arms can be moved between end positions through the cylinders 63, 64, these end positions being shown respectively in Figures 7 and 8. A motor 70 and a gear reducer 7.2 drive the driven support tamboi 52 through a time control band impeller 74, better shown in Figures 2 and 3. The engine 70 is capable of regenerative braking, for the purpose of stopping the rotation of a complete roller group as best described below. The motor 70 and the reducer 72 are mounted to the transverse frame member 71 for vertical movement as part of the secondary frame structure with the secondary support roller 52. The upper and upstream confronting edges of the secondary arms 50 and 51 are provided with notch 80 to look
tMu? - * f- -fHf **** _jtJfcju »«.?. jahatlia «..? backwards which are provided to receive one end of the core arrow 20. The cylinders 82 operate notch lock slides 84 mounted on the arms 50 and 51, through which the core arrow can be locked into place in the receiving notches 80 or through which the core arrow can be removed from the notches. The operation of the continuous winder 10 will be better understood with reference to the sequential drawings 4-9. Referring first to Figure 4, a fully wound roller group 100 is attached to a slot feeding band 102 and is supported on the secondary arms between the main drum 22 and the support drum 52, and substantially the weight of the Roller group 100 is compensated by hydraulic pressure in cylinders 62, 63, so that the core arrow 20 remains straight in a substantially neutral position. The ends 20A of the core arrow 20 are captured in the notch 80 through the arrows. closure plates 84. A recently covered core arrow 20 rests on the fixed upper cam surface 32 of the cam plate 29, while the pressure roller 30, which has previously been retracted to allow the placement of the arrow The core is now lowered into engagement with the core arrow and rests on the core arrow, ready to accelerate the new cores. The blade transfer shoe 40 is rotated from a low rest position to an upper operative position under the band
in operation 102 and actually elevates the web in operation on S upper surface and then to the grip 105 formed between the main drum and the roller group 100 With reference to Figure 5, after the start of the roller change sequence, the primary arms are rotated 5C from the position of -30 ° shown in Figure 4 to a position of -25 ° shown in Figure 5. In this position the slot 2 £ removes the anterior cam surface 31, and the arrow of core 20 and the cores in it fall to the bottom of slot 28, where the cores remain in contact with the upper surface of the individual sections of the operating band 102. At this point the pressure roller and the arrow of core are now spinning substantially at the speed of the band. The movement of the primary arms from the position of -25 ° to -20 °, Figure 5, triggered the process of cutting and transfer of band. An adhesive is sprayed onto the exposed upper surface of the running belt 102, through the separate nozzles 46 and, at the same time, the blade 42 is ejected out of the shoe 40 and into the path of the running belt. The inertia of movement of the slit band causes the sections of the band to be cut on the blade and the individual strips of the band are adhered to the respective cores on the core arrow 20 to begin the winding process. The adhesive remains on the upper surface of the band, now the band ends serve to stick or fix the band ends to the outer circumference of the rolls of the roll group 100. After a successful cut and transfer, the entire group of roller 100 can be moved to the position shown in Figure 6 through cylinders 63, 64, and rotation of the roller group is stopped through regenerative braking by motor 70 and support drum 52. In this position, the roller group weight is carried by hydraulic cylinders 58, 59. It is important to recognize at this point, that at the start of winding on the new core group, a core shaft supported along its length on the external surface of primary drum 22, with the core arrow remaining captured within the arm slot 28 of the primary arms and the grip remains, at the same time, loaded by the driven primary pressure roller 30. When the primary pressure roller 30 is lowered, it is driven to a speed mode to coincide or absolutely coincide with the speed of the new cores at the speed in line . The new core arrow is now sandwiched between the rollers 30 and 22 and is held in the slot 28, and is maintained in a straight axial position thereby eliminating critical speed problems. The roller 30 prevents radial movement and the grooves 28 prevent lateral movement of the core arrow. After cutting the web, the primary pressure roller 30 switches from adjustable speed to limited speed (SLAT) torque, and the winding continues. A grip relief system is activated, controlling the pressure in the cylinders 36 to provide the nip load between the cores and the drum 22 as a function of the roll diameter, the roll diameter being measured through an angle encoder of arrow at the pivot point 35 of the pressure roller arms 33 Further, after a successful transfer, and after movement of the secondary arms towards the vertical position shown in Figure 6, the knife and knife cutting assembly The belt transfer shoe 40 can be rotated clockwise on its travel arms to a rest position at an approximate 180-185 ° position through the motor / gearbox 23 and 23A. The new roller group 100 A continues to develop between the grip roller 30 and the primary drum 22, while the core shaft moves, as necessary, radiating from the slot 28 with the construction diameter of the roller group. This condition is shown in Figure 7. During this time, the secondary arms 50, 51 after the roller group 100 has been regeneratively stopped in a retainer through ur supporting drum 52, can be moved to a discharge position fully clockwise as shown in Figure 7 and the core retention slots 80 are opened through the retraction of the plates 84. The lift table elevates the winding rollers to a position of clear so that the secondary arms 50, 51 are pivoted towards the position
? The primary / secondary transfer is shown diagrammatically at 110 in the position shown in Figure 7. The core arrow can be pulled and recorded, and a registered arrow can be returned for speed to be placed on the primary arms. 24 in the slot 28 and on the cams 29 according to the core apparatus, well known in the art. Also, after regenerative braking by the support drum 52, where a percentage of support drum pressure can be added to the support drum to prevent slippage during braking, and charging of the complete roller group 100 continues, and Sub-assembly of carriage for the secondary support drum 52 is completely lowered to a low position, through the relative movement of the plates 50, 51 on the rails 52 of the secondary arms. This fully lowered position is illustrated in Figure 7. During the continuous winding of the roll group 100A, the primary arms 24, 25 continue to rotate and slowly move the winding group to + 30 ° from the vertical position as defined. After the primary arms is in the 30 ° position, substantially as shown in Figures 7 and 8 and winding roll 100A reaches a specific diameter, ie 45.72 cm, the primary or support arms move slowly to the primary drum 22 and are stopped by ur proximity switch 120 on the ends of the arms, in the groove 80. During this time, the secondary support drum 52
is taken to an elevated position in a speed mode. The proximity switch 120 indicates that the core arrow 20 is now in the notch, and the position substantially is shown in Figure 8. At that time, the closure plate 84 is activated by the cylinders 80 to close and secure the core arrow in notch 80 of the secondary arms. The winding now progresses as shown in Figure 8, where the construction roller group is wound on the secondary drum, while coupling is maintained by the pressure roller 30. The upward position of the support drum, at 52, it reduces the lifting pressure in the cylinders 59 to a compensator pressure applied by the cylinders 59 for the effect that the load on roll 100A is zero or non-important, so that the primary pressure roll load 30 is predominant. In a preferred embodiment, where rolls 100 with a diameter of 152.4 cm are formed, the initial coupling of the secondary arms, as described above, and as illustrated in Figure 8, can take place at a minimum diameter of 45.72 cm and the winding continues to continue driving the secondary drum 52 in the speed mode with the pressure roller engaged. This can continue at a predetermined intermediate position, for example, in a diameter of 60.96 to 76 2 cm. At that time, the pressure roller 30 is retracted, as shown in Figure 9 while the winding continues and the support arm 52 is changed from the speed control to the SLAT mode and the drum d '.
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support changes from balancing to a programmed support pressure as applied by the cylinders 58, 59. After the primary boom pressure roller 30 has been fully raised and the drive stopped, the primary arms can be rotated back to a loading position as shown in Figure 9, at -30 ° The support pressure grip programmed by the support drum 52 is adjusted to control the hardness of the roller Another proximity switch 130 on the support arms 50, 51 it senses whether the drum 52 is supplying excess support pressure and raising the winding group. This may be ur proximity switch also located in notch 30. When this proximity switch senses the core arrow, indicating the movement of the core arrow up in the notch, the support arm pressure can be slowly reduced until the core arrow and the rollers come down from the commutation! of proximity. The winding continues until the maximum selected diameter is achieved as illustrated in Figure 9, ready for roll change. The width of the slot 28 formed generally radially in the arms 24 and 25, is such that it forms a narrow fit with one of the supporting surfaces adjacent to the ends of the core arrow 20. The core arrow 20 is shown in elevation at the top of Figure 2, where it can be seen that each end of the core arrow is provided with a pair of
k. Á * kZk & amp? & , ^ -j- ....-.- ?? • support surfaces 20a and 20b at each end. The grooves 26 form a tight fit with the core arrow surface 20a and prevent lateral movement of the core shaft. The alignment of the groove in the arms approaches the arc of movement of the laying on the roller 30 in the starting position as shown in Figure 7. Therefore, at this critical moment, the ends of the core arrow 20 they are restricted by the walls of the slot 2 'against lateral movement. The construction diameter of the roller segments as defined by the individual cores is achieved through movement of the core arrow radially outwardly within the slot 28, against the force of the laying on the roller 30. It will also be noted that the primary arms 24, 25 receiving the core arrow in the inner part of the two pairs of support surfaces 20a and the handling towards the secondary arms in the grooves 80, is achieved by receiving the core arrow in the grooves 80 in the surfaces of external support 20b. The work of the construction rollers 10A from the primary to secondary arms, achieved in views 7 and 8, occurs at the moment when the construction rollers have achieved sufficient diameter ur, so that the core arrow can be released from the slot 28. This is a function of the design of the machine, but typically it can be a diameter of 45 72 cm or greater. The secondary arms 50, 51, following the discharge of first roller group 100, move towards a position of
reception as shown in Figures 7 and 8 and the transfer is made moderately by engaging the core arrow on the adjacent support surface 20b by stopping the rotations of the secondary arms 50, 51 by the sensor 120, and by closing the slots 80 cor. cylinders 82 and groove detents 84, that the movement in a non-interfering relationship adjacent to the primary arms, compensated pressure being programmed as a function of the position of the secondary arms 51, 52, by the sensor 50A provided to the cylinders 63 , 64.
Sequence of Operations
1. Although the winding group is the driven main bearing drum 22 and the driven support drum 52 and with the driven primary boom pressure roller 30 retracted, a newly new core arrow 20 is automatically loaded onto the cams 32 around the the slot 28 in the primary arms in the -30 ° position from the vertical centerline position. 2. After the beginning of the knee change sequence, the blade shoe 40 is indexed around the drum, under the band and stops in the cutting position on the other core side. 3. The boosted primary boom pressure roller 30 is lowered towards the core arrow and goes to the speed mode for
accelerate the new cores near the Vei line speed Figure 4. 4. The spray adhesive application nozzles 46 are very close to the respective band 102. 5. The primary arms 25, move 5 ° to -25 ° in position. from the vertical center line and the core arrow 20 lowers the cams 32 and on the band 102 and the drum 22, straightening the natural deflexion. 6. As the primary arms move to the -20 ° position, the adhesive is sprayed onto the band and sticks the ends onto the slot winding rolls 100. See Figure 5 7. The primary arms stop at the position of -20 °, which causes, that the precision cutting blade 42 comes out of the shoe 40 and encloses the bands. The tension of the band and the winding roll moment pulls the bands through I? blade causing a clean straight line transfer to the new cores with a light fold. 8. The pressure roller 30 of the driven primary arm switches from adjustable torque mode to velocity mode at limited speed (SLAT). 9. The grip relief system is activated and provides a grip load as a function of the roller diameter from an angle encoder at the pivot point of the arms 3: sensing the position of the pressure roller. 10. The support arms 50, 51 index the winding group
f of slit rollers away from the drum 22 towards the braking position. See Figure 6. 11. The blade shoe 40 rotates around the drum, the blade retracts and the shoe stops under the drum. 12. The driven support drum 52 remains gripped to roller group and regenerates to stop the winding group. A percentage of the support drum pressure is added to the support drum to prevent slipping 13. After the support drum 52 reaches the speed of zero, the support arms 50, 51 move towards the unloading position. See Figure. In this position the loading of the winding rollers, and the retraction of the roller 52, causes the winding rollers to oscillate. The degree of oscillation is limited by the upper edges of the roller groups remaining in contact with each other, thus limiting the degree of oscillation. When the roller group supported by the lifting table, the core arrow resumes its position in a straight line. 14. Table 110 is raised until it supports the winding group and automatically stops. 15. The support arm latches 84 are retracted. 16. The roller winding group is raised to the core arrow retraction position. 17. The primary arms 24, 25 slowly move the winding group to the position of + 30 ° from the vertical position 18. After the primary arms are in the position
* «* ^ + 30 ° and after the winding group reaches a smaller diameter, ie 45.72 cm, the support arms 50, 51 rotate back towards the drum 22 and stop when a proximity switch 140 on arm 50 he perceives it near the arrow of 5 new nucleus. See Figure 8. Switch 140 is shown in Figure 4. 19. Support arm lock 84 extends and closes ur lock, which allows retraction of the support arm under compensated pressure. 20. The support arm 52 is raised as the support arms pivot towards the drum 22 in the low-pressure high speed mode and switches to balance the pressure, ie, diameter of 60.96 cm and the group of winding is wound to the balanced support drum 21. As the rolls are wound, a position sensor 50A on the pivot of the support arm is used to program the compensated pressure of the support arm by the cylinders 58, 59 to avoid excessive flexion of the core shaft during the winding operation 20 22. When the winding group reaches a diameter of 60 9H cm. at 76.2 cm the primary boom pressure roller 30 rises and the support drum 52 changes from balanced to programmed support pressure and the impeller changes from the speed mode to the SLAT. 23. After the primary boom pressure roller 30 has been fully raised and the impeller is stopped, the primary arms 24, 25 rotate back to the loading position. See Figure 9. 24. The grip of the programmed support pressure is adjusted to control the hardness of the roller. The proximity switch 130 on the support arm senses whether the support drum is supplying excess support pressure and raises the winding group. If this switch senses the core arrow, the support drum pressure is slowly reduced until the rollers and the core arrow are below from the switch 25. After step 15, an arrow shaft automatically engages the core arrow and the inflation pressure bleeds. 26. The arrow 20 is then retracted from the winding group 100 through an automatic arrow tractor 27. The table 110 lowers the rollers to the roller platform (not shown) and tilts them to eject the rollers on the platform 28. New cutting cores are either manually or automatically loaded on the board. 29. After the board senses that new cores have been loaded, the board is raised to the arrow insertion position 30. The arrows are automatically inserted and automatically inflated. 31. An upper winch then picks up the sprocket and when the primary arms have rotated into the loading position, the arrow
it is automatically loaded back onto the cam 32 around the slot 28 in the primary arms. 32. The winder is now ready for the next automatic roller change after the programmed depth or diameter has been reached in the winding roller. Although the method described here, and the apparatus form to carry out this method, constitute modalities Preferred of this invention, it should be understood that the invention is not limited to this precise method and form of the apparatus, and that changes can be made either without departing from the spirit and scope of the invention which is defined in the appended claims