SK88894A3 - Device for winding of tissues - Google Patents

Abstract

A web winding system for winding adhesive backed web on cores mounted on wind-up spindles. The web is supported on a rotating suction drum. A knife mounted on a rotating wheel cuts the web against the supporting drum. A tab bar is mounted on the wheel adjacent to the knife, and applies a tab to the web in registration with the cut. In a second position of the wheel a tab source moves toward the tab bar and applies a tab to its surface. The knife is heated by a heater to a temperature above adhesive softening and below adhesive carbonizing to prevent adhesive to stick to or to accumulate on the knife. The web is lead to the supporting drum around a stationary gapping roller and a retractable gapping roller, mounted on an arm which is pivotable around the roller. When the knife has cut the web the arm pivots clockwise, and lengthens the distance between retractable roller and supporting drum, thus forcing the web to slide on the drum, and to form a gap between the leading cut end and the trailing cut end of the web. The gap allows for flying transfer of the web between the cores on the two wind-up spindles.

Description

P-tMť fabric winding device

Technical field

The present invention relates to fabric winding devices, but more particularly it relates to a roll winder equipped with cutting, marking and winding systems.

BACKGROUND OF THE INVENTION

Pressure-sensitive adhesive (PSA) tape as well as other adhesive or non-adhesive tapes and fabrics are often wrapped in rolls which may be wide e.g. 61 cm or 122 cm. These rolls are then cut into a number of individual rolls (e.g., 2.5 cm each) for distribution and sale. In operation, the fabric is usually wound on a mandrel until a predetermined amount has been wound and a roll formed. The fabric is then stopped and cut transversely so that the roll can be removed. A tab, which may be a piece of paper, may be attached along the fabric end to the roll to facilitate the gripping of the fabric end. The roller can then be replaced with a new mandrel, the beginning of the fabric will adhere to it and the new roller will be rewound.

The known roller winders of the type described above have several drawbacks relating to the three individual winding units. These assemblies will be discussed below and include a cutting system that cuts the fabric across its entire width, a marking system that marks the end of the fabric along its entire width, and a reel for catching the fabric before, during and after its cutting and marking.

Due to fabric cutting equipment, most of the retractors must be stopped while the fabric is cutting. This η makes it possible to fasten the end of the cut end of the fabric relative to the roll, and allows the fabric to be wound on the next mandrel. However, it would be desirable. cut the fabric without slowing down or stopping the movement of the fabric. This method of performing the operation without stopping the line will be referred to as performing the on the fly process - in this case, hot cutting.

In one of the fabric handling equipment tested at Minnesota Mining and Manufacturing Company of St. Petersburg. Paul, Minnesota, the acquirer of the present invention, the fabric is placed on a rotating vacuum drum with the adhesive side of the fabric facing away from the drum. The fabric is cut by rotating the knife on a rotating drum while the fabric is positioned on the surface of the drum. The vacuum from the drum holds the cut ends of the fabric in place to prevent them from creasing. This arrangement makes it possible to cut the fabric and transfer the new start to the new mandrel while the line is running. This makes it possible to do winding continuously, which has its advantages.

However, conventional knives usually cannot cut fabrics with an adhesive layer against a drum in a continuous winding process without the occurrence of difficulties caused mainly by the adhesive. In particular, three separate but related problems have emerged. First, the fabric and adhesive tend to get stuck and accumulate on the knife as it rotates through the cut point. The second - the adhesive mass usually accumulates on the knife. The third adhesive is transferred through the cut in the fabric and glued to the rotary drum. These problems are undesirable and attempts have been made to solve them.

Applying oils, greases, waxes and lubricants to the knife, as is usually done with rotary longitudinal cutters, does not completely remove the accumulation and transfer of adhesive. Also, changing the grinding angle of the knife, the dimensions, the type of teeth, and the size of the teeth does not eliminate these problems or change the angle between the blade axis and the drum surface. Cooling the blade to temperatures in the range

- J

-45 ° C to 5 ° C leads to the elimination of bonding problems, but the adhesive and the cloth in contact with the knife are absorbed difficult to process during a common conxacx and therefore the fabric may be more difficult to cut.

Another proposed solution was to heat the knife as shown in the catalog from Dienes Verke in Germany. The catalog describes cutting the fabric at a temperature suitable only to soften the adhesive. Only to soften the adhesive, the scoring and shearing blades are heated to a temperature of about 70 ° C, in order to prevent the adhesive from sticking to the knife. However, the knives described in the Dienes Verke catalog are intended for longitudinal cutting rather than transverse cutting of fabric. In longitudinal cutting, the blades continuously rotate or are pulled against the adhesive-coated fabric. By softening the adhesive mass next to the knife under the effect of heat, the shear strength of the adhesive mass adjacent to the knife is less than in the other adhesive mass. This low strength of the adhesive layer adjacent to the knife allows the material to be cut continuously to wipe most of the adhesive from the knife. However, a thin layer of adhesive remains on the knife, which is undesirable. If the temperature rises, the adhesive is even softer and the bonding problem worsens. These results show that increasing the temperature of the knife increases the softness of the adhesive and increases the problems of adhesive adhesion and transfer. In addition, the present invention does not relate directly to longitudinal cutting. but rather cross cutting, which is more periodic than continuous. In addition, continuous self-cleaning cutting and scraping processes of adjacent adhesive in longitudinal cutting do not exist in cross-cutting. In addition, the adhesive softened by the heat tends to coat the knife and push through the fabric onto the drum, requiring undesirable cleaning.

The Diene Verke catalog cited above also describes a high-temperature knife called element which can be heated up to 750 ° C. Such a high temperature carbonizes the adhesive and the fabric backing. The Diene Verke catalog discusses the possibility of using an element to separate the material and to melt or melt strands at the end of the fabric to prevent unraveling, e.g. p.When cutting tape into a typewriter. However, these problems differ from those described above and are not applicable to adhesive fabrics in general. It is therefore desirable to provide a cutting system that overcomes the drawbacks described in the prior art.

After cutting the fabric, it may be appropriate to create a mark at one or both of the cut ends. The tag is usually a narrow material snippet, e.g. paper that is applied to the PSA wrapped fabric side and extends across the width of the roll. For example, when the pressure-sensitive adhesive tape is wound onto a mandrel and then cut into individual smaller rolls, it may be desirable to make a mark at the end of the adhesive tape so that the consumer can grasp the end of the tape. Similarly, if a non-adhesive fabric is used, it may be desirable to provide an adhesive label at the end of the fabric that first adheres to the mandrel to attach the fabric to the mandrel prior to winding.

Most known marking systems usually apply the marks to the roller either manually or from the magazine before cutting the fabric. Marking is sometimes done on the fly, sometimes when the fabric is stopped. Apart from this, the mark is formed in a separate operation before the fabric is cut and the roll is separated. Therefore, it is very difficult to obtain a satisfactory cover between the cut and the placement of the mark, which is undesirable. Accordingly, it is desirable to provide a marking system for use with a roll winder, where the mark can be formed at the cut end of the fabric while the fabric is moving, avoiding overlapping problems of the prior art.

If the fabric has already been cut and the mark has been formed, if desired, the coiled roll must be removed from the take-up area and an empty mandrel must be placed in the retractor to secure the initial end of the cut of the fabric to start the take-up.

- (l) on a new roll. If the fabric should be cut while the fabric is running and the speed of the fabric is high (e.g. 120 rpm), the speed required to remove the full roll and replace it with an empty mandrel is very difficult to achieve. To achieve a timely replacement of the full roll with the empty mandrel, the full roll is usually removed before the cut end of the fabric adheres completely to the mandrel. However, such a procedure may not allow the roll winder to make an end cut on the fabric and thus may cause unwanted wrinkling or folding of the fabric.

One coil winding machine from Stahlkontor Maschinenbau GmbH attempts to overcome these problems by winding the fabric on a simple winding machine. The fabric, the drum and the take-up roller stop to allow the fabric to be cut off. After cutting, the drum and the take-up roll are spun again to wind the uncoiled remainder of the fabric while the incoming fabric is still standing. Then the coiled roll is replaced by an empty mandrel. Finally, the winder starts to rewind the feed fabric onto the new mandrel. When using this winder, the fabric is not cut and transferred to the new mat during operation. If such a winder is used in a continuous process, an accumulation device is required to retain the fed fabric while stopping the fabric to cut and transfer the end, and the speed is limited to 70 m / min to avoid tensile problems. In addition, the Stahlkontor machine cuts the fabric before the fabric comes into contact with the drum, leaving the loose fabric wrinkled.

Thus, it is desirable to provide a roller winding device which overcomes the drawbacks of the prior art.

SUMMARY OF THE INVENTION

The roll winder of the present invention comprises three related systems: a fabric cutting device, a marking device, a device for gripping and winding the cut fabric

The cutting device of the present invention overcomes the problems of bonding, accumulation and transfer in continuous coil reels by cutting with a knife heated to temperatures ranging from the softening point of the adhesive mass to close to the temperature at which it becomes carbonized. For some PSA tapes, this is above about 149 ° C. In practice, the fabric is rolled onto the rotating drum with the sticky side away from the drum. The fabric is attached to the drum usually by a vacuum applied from the drum to the tape and the tape is cut by rotating the knife on the drum while the fabric is placed on the surface of the drum. The drum holds the cut ends to avoid crouching. By heating the knife to temperatures above 149 ° C, the fabric and adhesive do not stick to the knife; adhesive does not collect on the knife; the adhesive is not transferred through the incision to the drum and is not deposited on the drum.

In one embodiment, the cutting and marking device not only cuts the fabric on a rotating drum while the fabric is running, but cuts and marks it in alignment with the fabric cut point. The cutting and marking device consists of a wheel, which is equipped with a knife and a marker placed on the wheel next to the knife. The marker includes a vacuum source that holds the marker paper. The marking paper is in the form of a roll which is mounted on the unwinder next to the wheel.

During winding of the fabric onto the mandrel, the wheel is positioned in the grip position of the mark and the take-up is positioned away from the wheel. After the unwinder unwinds the corresponding amount of marker paper, the paper is pulled between the knife and the unwinder. The unwinder is then moved into contact with the knife and the marker. When the marker paper comes into contact with the knife, it cuts off the marker from the marker paper and the marker is held on the marker. If the desired length of fabric has been wound onto a mandrel, the wheel is rotated to the fabric cutting position in which the knife can cut the fabric. As the wheel rotates, the marker moves the marker onto the fabric. When the wheel reaches the fabric, the mark is placed, the knife touches the fabric and cuts it. The marker places the marker on the fabric in alignment with the cut on the fabric. The knife and marker continue to rotate until they reach the starting position and the process can start again.

The winder of the present invention creates a gap between the cut ends of the fabric on the drum surface during the cutting and transfer operations of the winder. The fabric is still held during cutting and transfer of the insertion end to the new mandrel. This allows the winder to cut and transfer the end of the fabric to the new mandrel on the fly at a speed of 137.2 m / min or more. It also allows the fabric to be wound and cut on the drum without wrinkling the fabric.

The fabric first passes, if necessary, through the scraper roller and then passes to and around the removable tension roller before being partially wrapped around the drum. The rotating drum releases the fabric onto the mandrel located on one of the two winding spindles. When the first mandrel has already wrapped the desired amount of fabric, the blade rotates at the same surface speed as the rotating drum. The knife cuts the fabric as it rotates against the drum and the mark is placed. While the knife cuts the fabric, the tension roller rotates on the pivot arm away from the rotating drum in order to increase the distance between it and the drum. The tension roller rotates at approximately the same speed as the fabric speed. This causes one end of the fabric to slide over the drum. Since the rotating drum is still rotating at the same speed, a gap exists between the cut ends of the fabric. Vacuum from the rotating drum is used to hold the fabric on the rotating drum during winding. When the fabric slides on the drum surface as a result of the rotation of the tension roller, the vacuum controls the sliding force and maintains a constant tension.

To transfer winding from the first winding spindle to the winding spindle

- with the second winding spindle, the first winding spindle is pulled away from the surface of the drum immediately after the cut end of the fabric has been wound onto the roll. This causes the beginning of the cut fabric to bypass the first winder and begin to wind on the mandrel located on the second winding spindle. The second winding spindle is brought into contact with the surface of the rotating drum as soon as the first winding spindle moves away from the drum, the beginning of the tape adheres to the mandrel and begins to wrap around the mandrel of the second winding spindle.

During the winding part of the operating cycle, the tension roller slowly returns to the rotating drum. The distance between the tension roller and the drum decreases, while the drum speed increases slowly to maintain a constant tension and to grasp the additional length of the fabric. After the necessary amount of fabric has been wound onto the mandrel of the second winding spindle, the knife cuts the fabric, the tension roller is rotated to a gap forming position, and the fabric slides over the surface of the rotary drum to create a gap between the ends of the fabric. The first winding spindle comes into contact with the surface of the rotary drum as soon as the cut end passes through the location of the first winding spindle to catch the new start and start winding on the first winding spindle. The second winding spindle remains in contact with the rotating drum until the cut end is completely wrapped around the core.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be explained with reference to the accompanying drawings, in which:

Figures ΙΑ-1H are schematic views of the cutter, marker and winder of the present invention; and

figures 2A and 2B are schematic views of a marker according to the invention belonging to another embodiment.

Q

DETAILED DESCRIPTION OF THE INVENTION.

The winding system 10 of the present invention, which is shown in Figures 1A to 1H, can be used with most known tapes. After fabric 12 has been fabricated, it must be wound onto mandrels 14. The present winding system 10 allows cutting, marking, winding fabric 12 onto cores 14, and transfer of fabric between cores 14 on the fly. Various rollers 16 may be used, one of which is shown in the illustrative embodiment. The winding system 10 also includes a stationary separating roller 18 around which the fabric 12 is wound. The roller 18 can also serve to wipe the fabric 12 and eliminate wrinkles before the fabric 12 reaches the rotating drum 24. The tension sensor 20 is located on the roller 16 to measure the fabric tension and control the speed of the rotating drum 24 to maintain the desired fabric tension. The fabric 12 then passes to a pull-away primary separating roller or tension roller 22, which is located behind the roller 18. The tension roller 22 is rotatable about a radius with the center of rotation at the center of the roller 18. Preferably, the tension roller 22 and roller 18 have the same diameter; hence the perimeter.

The rotary drum 24 is positioned downstream of the tension roller 22 so that the fabric 12 travels in contact with a portion of the outer surface 26 of the rotating drum 24 after passing through the tension roller 22. The surface 26 covered with urethane rubber or other material supports the fabric 12 so that the sliding knife pushed against the fabric 12 thus penetrates through the fabric 12. The surface of the drum 26 may be steel if the path of the blade is precisely controlled to prevent damage thereto. Also, on the surface 26 there may be a thin groove in which the knife would engage so that the edges of the groove would support the fabric 12 near the cut, while the cut is made in the open space between the edges of the groove.

The fabric 12 may have an adhesive side, e.g. as the PSA, which faces away from the drum 18. when the fabric 12 is wrapped around it. This prevents the fabric 12 from sticking to the surface of the drum 20 and allows the beginning of the fabric 12 to be transferred to the cores 14 by adhesion. Adhesive transfer to the cores 14 in non-sticky fabrics can be accomplished by placing the adhesive directly on the mandrels. Also, an adhesive label may be placed at the beginning of the fabric to provide attachment to the mandrel. The drum 24 comprises a series of apertures 48 on its surface 26, which are connected to a vacuum source 50 through the drum 24. The vacuum represents a mechanism for keeping the fabric 12 in contact with the drum 24 during winding.

Two winding spindles 28. 30 are located next to the rotary drum 24 and carry mandrels 14 onto which the fabric 12 is wound to form rolls. The first winding spindle 28 is positioned relative to the second winding spindle 30. Both; the winding spindles 28, 30 are movable between a first position when the mandrel carried thereon is in contact with the rotating drum 24, and a second position when the mandrel (or roller) is spaced apart from the rotating drum 24. In alternative examples, a rotating head for holding several winding stations and for continuous loading and unloading of winding spindles.

The cutting knife 32 is positioned in front of the two winding spindles 28, 30 and cuts the fabric 12 when the fabric 12 rotates on the rotating drum 24. The knife 32 is mounted on the rotating wheel 34. The knife 32 cuts the fabric 12 on the rotating drum 24 holding the cut end 36 and a new start 36 'of the anti-crease fabric 12. Due to the speed required for cross-cutting the fabric on a rotating drum, the blade 32 should be cut by pressure or cutting through the adhesive fabric 12. Then the cutting and transfer can be performed on the fly without interrupting the winding so that the rolls can be wound in a single sequence and speed is constant.

A particularly advantageous feature of the present fabric cutting system is that the heater 35 heats the blade 32, thereby facilitating cutting. By heating the blade to temperatures higher than the heat required to soften the adhesive. but below the carbonization temperature of the adhesive, it allows the device to cut and transfer on the fly, without stopping winding, when the above gluing, accumulation and transfer problems are overcome. For some PSA tapes this temperature will be above 149 ° C. By heating the knife to these temperatures, the fabric or adhesive does not stick to the knife; adhesive does not accumulate on the knife; and the adhesive does not pass through the incision in the fabric and does not accumulate on the drum. In addition, the fabric cuts more easily and with less force.

It is believed that the present heated cutting system achieves the desired results since one of the major adhesive components melts when the adhesive contacts the knife. This melting changes the rheology of the adhesive mass much more than simply softening the adhesive by a small increase in temperature. In addition, the melting component of the adhesive may also act as a lubricant for the knife.

This cutter can be used in continuous and discontinuous drum reels, with cut and uncut fabrics and with or without an adhesive layer. The heated knife can cut any kind of fabric in the air or against the support. Cutting non-sticky and inorganic fabrics, e.g. glass fabric is also improved by heating the knife.

Also provided is a marker for marking one or both of the cut ends 36 and 36 ' of the fabric 12. The cutter and the marker are positioned in front of the two winding spindles 28, 30. After the knife 32 cuts the fabric 12 on the rotary drum 24 as the fabric 12 is rotated thereon, the device cuts the mark 60 from the roll of marker paper 64 and places the mark on the fabric 12 in alignment with the cut end 36 of the fabric 12. In the illustrated embodiment, the mark is placed in alignment with the cut end 36 of the fabric, but may also be placed at the beginning 36 '' of the new fabric roll instead of or at the same time as the end 36. The cutter and marker 26 consist of a wheel 34 that rotates as already explained. The blade 32 is mounted on the wheel 34. The marker 52 is located on the wheel 34 adjacent the knife and includes a mechanism to hold the marker paper

64. In one embodiment, the mechanism comprises a vacuum source 66 coupled to the surface 68 of the marker 52 through a series of holes on the surface 68. A roll of marker paper 62 is mounted on the unwinder 70 next to the wheel 34. Adhesive fabrics 12 allow the label to be stuck on the use of glue on the label, but also non-sticky fabrics with sticky labels can be used. The unwinder 70 is comprised of a roll of marker paper 64 and a support roller 72 situated at the roll 62 of the marker paper 64 extending from the roll and a guide on the marker paper to and around a portion of the support roller 72. The unwinder 70 is movable from a first position distant from the knife 32 to the second position adjacent to the knife 32 and in contact with the knife 32. The unwinder 70 unwinds the necessary amount of marking paper 64 to form a mark 60 for placement on each roll 40 during winding of the fabric 12 onto the mandrel 14.

During the winding of the fabric 12 on the mandrel 14, the wheel 34 is rotated in the mark receiving position and the unwinder 70 is in its first position, away from the wheel 34. After the unwinder 70 unwinds the necessary amount of marking paper 64, the marking paper 64 is positioned between the knife 32 and an unwinder 70 as shown in Figure 1A. The unwinder 70 is then moved to a second position, in contact with the knife 32 and the marker 52, while the knife 32 and the marker 52 remain at rest, as shown in Figure 1B. When the marker paper 64 touches the knife 32, the knife 32 cuts the marker 60 from the marker paper 64 and then the vacuum 66 on the marker 52 holds the marker 60 on the surface 68 of the marker 52. The unwinder 70 then returns to its first position. The mark 60 is held on the marker 52, and after winding the desired amount of fabric 12 onto the mandrel 14, the wheel 34 rotates toward the cutting position of the fabric 12 in which the knife 32 can cut the fabric 12 as shown in Figure 1C. During rotation of the wheel 34, the marker 52 transfers the marker 60 to the fabric 12. As shown in Figure 1D, if the wheel 34 contacts the fabric 12, the marker 60 is positioned and the blade 32 comes into contact with the fabric 12 and cuts it. The marker 52 places the marker 60 in alignment on the cut ends 36, 36 'of the fabric 12. The adhesive on the fabric 12 allows the marker 60 to adhere to the fabric 12. The knife 32 and the marker 52 continue to rotate until they reach the position of Figure 1E, which coincides with the one in Figure IA and the process can start over. Since the drum 24 holds the cut ends 36, 36 ' of the anti-crease fabric 12, the cutting and transfer can be performed on the fly without stopping the winding and therefore the rolls 40 can be wound in a continuous process and the machines run at the same speed.

This marking system precisely cuts and places marks across the width of the cut end of the roll from the entire length of marker paper using a simple arrangement that is built into the cutter. This system has the following advantages over a system with pre-cut marks. It can be used as well as continuous batch winders and cutting reels in continuous roll reels. Optimum placement of the mark is achieved because the same knife cuts both the fabric and the mark. Separate cutting of the mark is eliminated because the marks are cut from the entire roll and there is no need to keep the cut marks in stock.

In an alternative embodiment of the cutter and marker shown in Figure 2, it is better than cutting and placing the marker 60 from the paper at the ends 36, 36 'of the fabric 12, applying the thermoplastic ink 80 as the marker 82 to the fabric 12. In this case smooth surface 68. The process of this process is similar to that of the previous paper marker marker, as shown in Figure 1. When the wheel 34 is in its marker receiving position, as shown in Figure 2A, the ink jet printer 84 sprays ink 80 onto the marker 52 by passing along him. As the wheel 34 rotates to cut the fabric and position the mark, as shown in Figure 2B, the marker presses the ink 80 onto the fabric 12 during cutting. Alternatively, the ink 80 may also be applied directly to the fabric 12 from the nozzle 84. if the fabric stops. The ink 80 adheres to the adhesive on the fabric 12 to form a non-sticky surface that has the role of the mark 82 at the end of the roll. The wheel 34 continues to rotate to its mark receiving position so that the process can be repeated. Because the ink jet printer 84 can start and end as it passes across the fabric 12, the marking application can be adapted for a double cutting and winding process in which the fabric 12 is pre-cut to predetermined widths and the ink marks 82 are applied along the full width when the fabric is 12 cut. The start and end of the application of the mark can be arranged easily with each cut of the knife and can be easily changed if the cut width of the fabric has changed by programming the print head of the printer 84 that applies ink to the marker 52. it is not applied to other belts.

Although adhesive is not required on the fabric to adhere ink; Adhesive is sometimes the reason why a label is used to help identify the beginning of the tape with the label and help the label start unwinding. On non-adhesive tapes, the marking ink or other material can be used as an adhesive to adhere the last fabric roll to its roll. By placing the marker and the marker on the other side of the knife, the marker can be applied to the mandrel winding start 36 so that it can adhere the first winding of the non-adhesive fabric to the mandrel. In addition, instead of the thermoplastic ink, curable coatings may be used as a label. These coatings would be cured using light, chemical reactions, radiation or heat. Anti-stick powders such as glass beads or ground talc may also be used.

Pressure sensitive adhesive (PSA) tapes work very well in this arrangement, as do other adhesive fabrics. The paper and ink mark are used to identify the end of the tray and can be used for advertising, labeling, or other tape-related information. On the printed mark, this information can be easily changed on the fly, using programmable printer electronics.

Immediately after the cutting and marking steps described above in detail, the present winding device creates conditions for the formation of a gap, known as the end gap, between the slit sections of the fabric - end 36 and beginning 36 '. In the example shown, the tension roller 22 is mounted on an arm 42 that rotates about the center of the roller 1.8. The tension roller 22 rotates from a first winding position to a second position that extends the distance, known as the transition line, between the tension roller 22 and the rotating drum 24 to form a gap between the ends 36, 36 'of the fabric 12. Once the fabric 12 is cut, the tension roller 22 is rotated to extend the transition line, allowing the fabric 12 to slide over the surface 26 of the rotating drum 24, thereby forming a gap 44 between the slit ends 36, 36 'of the fabric 12. The tension roller 22 is rotated by a mechanism 46, which may be a mechanical rocker or have an electric drive such that the rotational speed is a function of the line speed.

The rotating drum 24 comprises a series of apertures 48 on its surface. which are connected to a vacuum source 50 via a rotating drum 24 as mentioned above. The vacuum 50 represents a mechanism increasing the frictional force between the fabric 12 and the rotating drum 24 and keeping the fabric 12 in contact with the rotating drum 24 during winding. When the fabric 12 slides on the surface of the rotating drum 26 as a result of the rotation of the tension roller 22, the vacuum 50 regulates the sliding force of the fabric 12 on the rotating drum 24 and provides a constant tension on the line.

The transfer of the fabric between the mandrels mounted on the winding spindles is as follows. The fabric 12 begins to wind on the mandrel

14, which is mounted on the winding spindle 28 as shown in Figure 1A. During winding to the first winding spindle 28, this is located on the rotating drum 24, while the second winding spindle 30 is remote from the drum. When the fabric 12 is wound around a rotating drum 24 with an adhesive side away from the drum, the fabric 12 is adhered to a mandrel 14 mounted on a winding spindle 28. After winding the desired length of the fabric 12 onto the winding spindle 28, the knife wheel 34 rotates at the same peripheral speed as the rotating drum 24. The knife wheel 34 rotates at a speed adapted to the speed of the drum 24 by means of a knife drive (not shown) which is mechanically or electrically connected to the drum 24. The knife drive is activated after winding a specified length of fabric 12. discarded from the drum 24 for cutting the fabric 12 as explained above.

As the blade wheel 34 rotates to reach the fabric 12. the cutting edge of the knife 32 contacts the fabric 12. The knife 32 cuts the fabric 12 as the fabric 12 rotates on the rotating drum 24 and a cut 60 is placed on the cut end of the fabric 52. as shown, it can be positioned on the rotating wheel 34 next to the knife 32. The marker 52 places the marker on the fabric 12 in alignment with the cut end 36 of the fabric 12. Alternative methods of positioning the marker can also be used.

During cutting of the fabric 12 by the knife 32, the tension roller 22 is pivoted on its pivot arm 42, with the center of rotation at the center of the roller 18. away from the rotating drum 24 to extend the transition line between the tensioning roller 22 and the rotating drum 24. The tensioning roller 22 rotates at a speed nearly equal to that of the fabric. This causes the fabric 12 to slide over the surface 26 of the drum 24, since the rotating drum 24 continues to rotate at a constant speed, the rotational movement of the tension roller 22 creates a gap 44 between the slit ends 36, 36 'of the fabric 12 as shown in Figure 1D. The gap 44 increases as well as the length of the crossing line. Usually this increase and therefore the gap 44 has 15 cm.

To transfer winding from the first winding spindle 28 to the second winding spindle 30, the first winding spindle 28 is withdrawn from the drum surface 26 after the cut end 36 has passed through the first winding spool. This results in the new fabric start 36 'passing the first winding spindle 28 and continuing to wind onto the second winding spindle 30. The mandrel 14 mounted on the second winding spindle 30 moves so as to contact the surface 26 of the rotating drum once it is first. a winding spindle 28 pulled away from the drum and the start 36 'is glued to the mandrel 14 mounted on the second winding spindle 30 and begins to wind.

During the winding portion of the operating cycle, the tension roller 22 slowly rotates toward the rotating drum 24, to its initial position as shown in Figure 1F. As the tension roller 22 returns, the length of the transition line between the tension roller 22 and the drum 24 decreases as the speed of the drum 24 increases continuously to maintain a constant tension and to equalize the difference in fabric length 12. The increase in drum speed depends on the current of the return speed a is performed in the drum drive according to the voltage sensor signals.

After winding the desired amount of fabric 12 onto mandrel 14 on the second winding spindle 30, winding is transferred from the second winding spindle 30 to the first winding spindle 28. First, the knife wheel 34 is rotated so that the knife 32 comes into contact with the fabric 12 and cuts it. , according to IG. During cutting of the fabric 12 with the knife 32, the tensioning roller 22 rotates away from the rotating drum 24 to extend the transition line between the tensioning roller 22 and the drum 24 so that the fabric 12 slides over the surface 26 of the rotating drum 24 to form a gap 44. As shown 1H, the mandrel 14 mounted on the first winding spindle 28 is moved into contact with the surface of the rotating drum 26 as soon as the end cut 36 passes around the first winding spindle so that the beginning 36 'of the fabric 12 can start winding on the first winding spindle 28. the winding spindle 30 remains in contact with the rotary drum 24 until the cut-off end 36 of the fabric 12 is fully wound onto the roll 40. Then the second winding spindle 30 is moved away from the rotary drum 24. When winding starts again on the first winding spindle 28, slowly returning to its initial position with a short transition line, as shown in Figure 1A, and the cycle starts again.

This winding system 10 increases the time available for transmission between the two winding spindles 28, 30 in a considerably simplified design. By forming an end gap 44, the cut ends 36 and 36 'of the fabric 12 are pulled away from the knife 32 after cutting to prevent them from sticking or sticking to the knife 32. Furthermore, the gap 44 prevents the fabric 12 from coming into contact with the mandrel 14 prematurely during any cutting and transfer phase. on a known drum winding device. Both the cut and the transfer are made at full speed of the line upstream of the fabric speed, and the rotation inertia of the roller 18 and the tension roller 22 therefore remains constant. This eliminates speed and inertia disturbances in upstream devices.

This system can be used with continuous or batch drum reels, with or without cut fabrics and with or without an adhesive layer. This system can also be used where the turret heads or other devices move the winding reels to the winding position, where the winding spindle applied touches the drum when the gap is in its region. The trailing gap simplifies transmission to a sufficient level and does not require the use of head mechanisms. Moreover, this winding system is simpler, less expensive, multipurpose and more reliable than known winding devices.

A particular winder that can utilize the present invention is to provide fabrics having a width of 63.5 centimeters to paper or plastic mandrels that are 73.67 cm long and 7.62 cm internal diameter. The wall thickness of the mandrel can be from 0.25 to 1.02 cm, and coils up to a diameter of 43.2 cm can be produced depending on the size currently selected by the operator. Since there are no restrictions on the thickness and material of the fabric, glass and cotton fabrics, nonwoven coatings, composites and fabrics of high strength and with a thick adhesive layer can be used.

Winding speeds of up to 120 m / min were achieved. The machine can perform a cycle of replacing the coiled roller with a new mandrel in 8 seconds and can wind up centrally or superficially with central assistance. Center winding and winding; centered refers to the rotational movement of the winding spindles, which is provided independently by these spindles, as opposed to the contact of the roll with the drum 24. Thus, in the surface winding, the winding coil remains in contact with the drum 24 throughout the winding, and in contact with the drum 24 only at the first and last turns, and for the remainder of the time, only the core of the coil being wound is the source of winding torque.

This winding system 10 creates a gap without causing fabric tension problems resulting from changes in the roll inertia with respect to starting and stopping the line. Since the rotational inertia of the rotating drum 24 remains constant throughout the gap formation, there is no inertia change that would transmit the fabric tension problems to the fabric 12. This is achieved simply by the construction of the system 10. The problems of the inertia of the rolls can be overcome by other systems. For example, on each roll affected by the change in rotational speed, precise control can be used so that the roll will be driven with a precise speed profile so that its speed corresponds to the fabric speed on the winder and to prevent roll inertia causing fabric tension problems. Also, the rollers may be replaced by sliding or free-pivoting members on which the fabric slides freely to avoid fabric tension problems.

Many features, advantages and embodiments of the invention have been explained in detail in the foregoing description with reference to the corresponding figures. The description is illustrative only and is not intended to limit the invention to the specific examples given. Various changes and modifications to the invention may be made by those skilled in the art without circumventing the claims or the spirit of the invention.

Claims (22)

PATENT CLAIMS A fabric winding device for winding adhesive fabric onto mandrels slid on a first or second winding spindle, for cutting fabric and marking the fabric in alignment with the cut end of the fabric, and for transferring the fabric between mandrels on the fly, comprising: (a) the first roller around which the fabric is rotated; b) a rotating drum positioned downstream of the first roller such that the fabric moves in contact with a portion of the surface of the rotating drum; c) a tension roller around which the fabric is wound, said tension roller being positioned between the first roller and the rotating drum, the tension roller being movable towards and away from the rotating drum; d) a fabric cutting knife to form a beginning and an end of the fabric, the knife comprising a device for preventing the adhesive from sticking from the fabric to the knife and preventing the accumulation of adhesive on the knife; (e) a marking device for placing the mark on the fabric in alignment with the cut end of the fabric, consisting of: (I) a marker placed next to the knife; (Ii) the source of the marks; (Iii) devices for moving the marker source from a first position remote from the knife and marker to a second position adjacent the knife and marker, allowing the marker to receive the marker while the knife and marker are in the second position; and IV) a device for rotating the knife and marker from the second position to the fabric cutting position to allow the knife to cut the fabric while the marker places the mark on the fabric in alignment with the cut point; f) a device for moving the tension roller away from the rotating drum immediately after cutting the fabric to increase the distance between the tension roller and the rotating drum. 22nd to allow the fabric to slip over the surface of the rotating drum and create a gap between the slit ends of the fabric; and (g) a device for transferring fabric from a mandrel inserted on a first winding spindle to a mandrel inserted on a second winding spindle. The fabric take-up device according to claim 1, wherein the marker source is a paper unwinder on which a roll of paper is placed, wherein the marker comprises a marker paper holding device, and wherein the device for moving from the first position to the second position enables the knife. cut the mark from a roll of marker paper. The fabric take-up device according to claim 1, further comprising: h) a first winding spindle on which a mandrel can be mounted, wherein the first winding spindle is movable between a first position in which the mandrel is mounted on the mandrel in contact with the surface of the rotating drum and a second position in which it is spaced from the rotating drum; and (i) a second winding spindle on which a mandrel can be mounted, wherein the second winding spindle is located downstream of the first winding spindle and is movable between a first position in which the mandrel mounted on the mandrel is in contact with the surface of the rotating drum; a position in which it is spaced from the rotating drum. The fabric take-up device according to claim 1, wherein the tension roller is rotatable and further comprises a device for rotating the tension roller towards the rotating drum to reduce the distance between the tension roller and the rotating drum while the drum speed is increased. to maintain a constant tension and maintain excess fabric length during winding. The fabric take-up device according to claim 1, characterized in that the bonding and accumulation is prevented by a device consisting of a cutting blade that is heated to temperatures higher than the softening temperature of the adhesive mass and lower than the carbonization temperature of the adhesive mass. 6. A cutter and marker for use with a fabric take-up device, characterized in that the cutter and marker cuts the fabric on a rotary drum while rotating the fabric on the drum, and affixes to the fabric a mark in alignment with the fabric cut consisting of: a) knife (b) a marker placed next to the knife (c) the source of the marks d) devices for moving the marker source from a first position remote from the knife and marker to a second position adjacent the knife and marker while allowing the marker to receive the marker while the knife and marker are in the second position; and (e) a device for rotating the knife and the marker from the second position to the fabric cutting position, allowing the knife to cut the fabric while the marker places the marker on the fabric in alignment with the fabric cutting point. The cutter and marker according to claim 6, wherein the marker source comprises a ink jet printer that applies ink to the marker. The cutter and marker according to claim 6, wherein the marker source is a marker paper unwinder on which the marker paper roll is attached, wherein the marker comprises a device for holding the marker paper, and wherein the device for moving the unwinder from the first position to the second position. allows the knife to cut a marker from a roll of marker paper. 9. A fabric winding device for winding fabric onto mandrels mounted on a respective first or second winding spindle and for transferring fabric from mandrel to mandrel during operation of the apparatus, comprising: (a) the first roller around which the fabric is wound; b) a rotating drum positioned downstream of the first roller such that the fabric passes in contact with a portion of the surface of the rotating drum; c) a removable tension roller positioned between the first roller and the rotating drum around which the fabric is wound, wherein the tension roller is movable towards and away from the rotating drum; (d) fabric cutting equipment; e) a device for moving the tension roller away from the rotating drum immediately after cutting the fabric, to increase the distance between the tensioning roller and the rotating drum to allow the fabric to slide on the surface of the rotating drum and thereby create a gap between the ends formed by the fabric cutting; and (f) a device for transferring a fabric from a mandrel mounted on a first winding spindle to a mandrel mounted on a second winding spindle. The winding device according to claim 9, further comprising: g) a first winding spindle on which a mandrel can be mounted, wherein the first winding spindle is movable between a first position in which the mandrel is mounted on the mandrel in contact with the surface of the rotating drum and a second position in which it is spaced from the rotating drum; and h) a second winding spindle on which a mandrel can be mounted, wherein the second winding spindle is located downstream of the first winding spindle and is movable between a first position in which the mandrel mounted on the mandrel is in contact with the surface of the rotating drum and the second position in which it is distant from the rotating drum. The winding apparatus of claim 9, wherein the device for transferring a fabric from a mandrel mounted on a first winding mandrel to a mandrel mounted on a second winding mandrel comprises a device for moving the first winding mandrel from a first position to a second position as the gap passes through space. a first winding spindle, a device for moving the second winding spindle from the second position to the first position when the first winding spindle is removed and the device for winding the beginning of the fabric onto the mandrel mounted on the second winding spindle. The winding apparatus of claim 11, further comprising a device for transferring a fabric from a mandrel mounted on a second winding mandrel to a mandrel mounted on a first winding mandrel, comprising a device for moving the first winding mandrel from a second position to a first position; when the gap extends through the space of the first winding spindle so that the beginning of the fabric can be wound onto a mandrel mounted on the first winding spindle, a device for holding the second winding spindle in a first position while the end of the fabric is winding on the second winding spindle to the second position. The winding device of claim 9, wherein the tension roller is rotatable and further comprises a device for pivoting the tension roller to the rotating drum to reduce the distance between the tension roller and the rotating drum while increasing the speed of the drum to maintain constant tension and retention of excess fabric length during fabric winding. The take-up device of claim 9, wherein the rotating drum comprising a vacuum is applied to the fabric through the rotating drum, wherein the fabric slides over the surface of the rotating drum when the tension roller is rotated and the vacuum regulates the fabric sliding force on the rotating drum to maintain constant tension. in fabric. 15. A knife for cutting fabric with an adhesive layer, characterized in that the knife comprises a fabric cutting device and a device preventing the adhesive from sticking from the fabric to the knife and preventing the accumulation of adhesive on the knife. A knife according to claim 15, characterized in that the cutting device comprises a cutting blade and a device preventing sticking and accumulation, further comprising a device for heating the blade to temperatures higher than the adhesive mass and lower than the carbonization temperature of the adhesive mass. A knife according to claim 15, wherein the heating device is adapted to heat the cutting blade to temperatures from 149 ° C to 232 ° C. A knife according to claim 15, characterized in that the fabric is cut with a knife on a rotating drum, and wherein the adhesive and accumulation prevention device further comprises a device preventing transfer of adhesive material to the drum through the cut in the fabric and its depositing on the drum. A knife according to claim 18, wherein the transfer inhibiting means and the accumulating and sticking preventing means comprise means for heating the cutting blade to temperatures higher than the temperature required to soften the adhesive material and below the carbonization temperature of the adhesive material. 20. A winding device for winding an adhesive fabric onto a mandrel, comprising: (a) at least one roller around which the fabric is wound; b) a rotatable drum positioned downstream of the roll such that the fabric contacts in contact with a portion of the surface of the drum; c) a winding spindle on which a mandrel is mounted; and d) a knife that cuts the fabric on the drum, said knife comprising a device for heating the knife to temperatures higher than the softening temperature of the adhesive mass and lower than the carbonization temperature of the adhesive mass. The winding device according to claim 20, further comprising: (e) a device for placing the mark on the fabric in line with the cut of the fabric. The winding device according to claim 21, wherein the drum comprises a vacuum acting on the fabric through the drum to keep the fabric in contact with the drum during winding.