EP3224168A1

EP3224168A1 - Winding machine for winding lengths of material

Info

Publication number: EP3224168A1
Application number: EP15790034.1A
Authority: EP
Inventors: Andreas HACHMANN; Manfred Penkert
Original assignee: Truetzschler GmbH and Co KG
Current assignee: Truetzschler GmbH and Co KG
Priority date: 2014-11-28
Filing date: 2015-10-31
Publication date: 2017-10-04
Anticipated expiration: 2035-10-31
Also published as: CN106794950A; ES2723973T3; EP3224168B1; DE102014117522A1; US10526154B2; CN106794950B; PL3224168T3; US20170341893A1; PT3224168T; WO2016082910A1

Abstract

The invention relates to a winding machine for winding lengths of material, in particular for films, having a feeding system (20), comprising a first belt feeder (30) which, during winding of the length of material (2) around a winding core (25) in a first direction, at least partially surrounds the length of material (2). The invention is characterised in that the feeding system (20) has a second belt feeder (40) which is suitable for winding the length of material in a second direction around the winding core (25).

Description

Title: Winding machine for winding webs

description

The invention relates to a winding machine for winding webs, in particular for films, with a placement system, comprising a first belt feeder, which at least partially wraps around the web during winding of the web about a winding core in a first direction. When winding webs, the winding machines on one or more contact rollers, which rest on the web and press out the air during winding. For very thin films that are particularly stretchable, across the width of the web can build a different tension in the web, which comes from a non-uniform thickness profile in the production due to temperature fluctuations. Contact rollers are not suitable for these thin films because they act very inflexible over the entire winding width with the same pressure on the film.

In order to assist the Anwickelvorgang in thin films are applying systems known that press with a variety of juxtaposed tapes on the film. Although these belts are driven by a common drive, but they are so flexible that they can act on the thin film over the winding width of the web with a different pressure. Tensions due to the different thickness profile do not increase in this way. However, these application systems have the disadvantage that they only for a winding direction are designed. Another disadvantage is the limited flexibility to different winding diameter.

It is an object of the invention to provide a winding machine with a placement system that is suitable for two winding directions and for different winding diameter.

The invention solves the problem by the teaching of claim 1; Further advantageous features of the invention are characterized by the subclaims.

According to the technical teaching of claim 1, the winding machine for winding webs, in particular for films, a placement system with a first belt feeder, which at least partially wraps around the web when winding the web around a winding core in a first direction.

The invention is characterized in that the application system comprises a second belt feeder which is suitable for winding the material web around the winding core in a second direction. This can be decided very quickly and without conversion measures in coated webs, for example, on which side the coating should lie during winding. The first direction of the looping can be done, for example, clockwise, so that the second direction in which the web is wrapped by the second band feeder, takes place in the counterclockwise direction, and vice versa.

Preferably, the first and second band feeders each have at least two levers, between which a circumferential belt is arranged. Both band investors are thus able, over the width of the web, a flexible tension on the web applied. Furthermore, it is thus possible to wind strips of webs in both winding directions.

A further improvement is that the circulating belt is an endless belt which rotates between each two levers of the first and the second belt feeder. Although only one sliver feeder is engaged at a time, the second sliver feeder, which is in the parked position, provides for a maximum wrap angle of the belt around the web due to the belt guide.

Preferably, the levers are designed as two-sided, centrally mounted lever. This allows a large variable diameter range to be wound up.

It is particularly advantageous that the levers are mounted via two coupling joints. This allows the pivot range of the lever set exactly. Due to the second coupling joint, the pivoting range becomes smaller, as a result of which this strip feeder becomes very compact.

A combination of both lever systems, wherein the first belt feeder has two-sided, centrally mounted lever, and the second belt feeder has levers mounted on two coupling joints, makes it possible to realize a large, variable diameter winding area at least in one winding direction, but at the same time the winding system of the winding machine not stressed too much space.

By means of the pressure elements arranged on or in the region of the heads of the levers, additional pressure can be exerted on the material web to be wound up. The pressure elements can be designed as force-loaded rollers or as spring elements. Particularly preferably, the pressure elements are designed as spring plates, which can enlarge the looped pressure area of the application system like a finger. By means of the pivotable arrangement of the application system on the winding machine, a position that is gentle on the material web can be assumed when changing or reinserting the winding core.

The invention will be explained in more detail with reference to the accompanying drawings; in these shows

Fig. 1 is a perspective view of a winding machine;

Fig. 2 is a side sectional view through the winding machine; 3 shows a detailed representation of the application system;

Fig. 4 is an enlarged detail view of Figure 1;

Fig. 5 is a further detail of the application system.

According to FIG. 1 and FIG. 2, a web 2, for example a film made of plastic, enters the winder 1 and first circulates a pulling mechanism, which consists of a hinged and pneumatically loaded pinch roller 3 with a lower roller 4 and a constant tension exerts on the web 2. The web 2 is further guided between two guide rollers 5, 6, which have a length measuring device, not shown, to determine the run in the winder 1 length of the web 2. Furthermore, the web 2 is guided to a cross cutter 10, wherein the web 2 between two rollers 11, 12 clamped and guided to the application system 20 to be wound there around a winding core 25 or a winding tube. The cross cutter 10 is pivotally mounted on the frame 7 of the winding machine 1 and has a cutting device 10 which cuts the web 2 transversely to the longitudinal direction or transport direction. Also, the rollers 12, 13, which are adapted to generate a contact pressure on the web 2, are pivotally mounted on a lever system to provide space when loading the web 2. Advantageously, the roller 11 can be designed as a driven roller. The application system 20 comprises at least two support plates 23, 23 ^' , which are connected to a plurality of axles or shafts. In this exemplary embodiment, three support plates 23, 23 ^' , 23 ^" are arranged, which are arranged pivotably about a pivot point 21 on the frame 7 of the winding machine 1 by means of at least one adjusting means 22, for example a pneumatic cylinder or an eccentric drive ', 23 ^" is a receiving opening 24 for receiving a winding core 25 is arranged, which is driven outside of the winding machine 1. On both sides of the receiving opening 24 and parallel to the longitudinal axis of the winding core 25, a first and a second belt feeder 30, 40 is arranged.

The first band feeder 30 according to FIG. 3 comprises at least two levers 31, 31 ^' , of which only the lever 31 is visible in this illustration. The levers 31, 31 ^'of the first band feeder 30 are designed as two-sided lever, wherein at one end of the lever a head 34 is arranged with a pressure element 38 in the form of a spring plate and acts on the other end of the lever an adjusting means 33 in the form of a pneumatic cylinder. The pressure element 38 can also be arranged between two levers 31 ^' , 31 ^" Each lever 31, 31 ^' is pivotably mounted via a pivot point 32, so that upon actuation of the actuating means 33, the heads 34 of the levers 31, 31 ^' execute a pivoting movement Furthermore, a guide roller 35 is arranged on the head 34 of each lever 31 and a further roller 36 is arranged in the region of the pivot point 32, whose axis connects the two levers 31, 31 ^' with one another 31, 31 ^' and deflect a belt 37. The first belt feeder 30 thus comprises at least two levers 31, 31 ^' , between which a belt 37 is arranged. The levers 31, 31 ^' can reach the head 34 via the adjusting means 33 on the receiving opening 24 with the winding core 25th be pivoted, the levers 31, 31 ^' on one side have a concave recess to create space for the wound web 2 at a larger diameter.

The second band feeder 40 likewise comprises at least two levers 41, 41 ^' , between which the belt 37 is arranged. Each lever 41, 41 ^' has at one end a head 44 with a pressure element 38, also here in the form of a spring plate on. The pressure element 48 can also be arranged between two levers 41 ^' , 41 ^" , Furthermore, a deflection roller 45 is arranged on each head 44, which connects two levers 41, 41 ^{' to} one another and forms a deflection for the belt 37. At the other end of a belt Each lever 41, 41 ^' has an adjusting means 43 in the form of a pneumatic cylinder which can pivot the lever 41 about a pivot point 42. A roller 46 is also arranged at the pivot point 42, the axis of which connects the two levers 41, 41 ^{' to} one another In this embodiment, the lever is also designed as a two-sided lever, but which is pivotable about two spaced coupling joints 47. The lever 41 thus forms a coupling mechanism in the form of a four-bar linkage, so that the head 44 of the lever 41st performs a defined pivoting movement, which will be explained later.

The belt 37 passes through the first and the second belt feeder 30, 40 and is thereby guided via the deflection rollers 35 and 45 to the rollers 36 and 46. From there, the trained as an endless belt or flat belt belt 37 to a drive roller 26 and a belt tensioner 27. The drive roller 26 drives the belt either - depending on the direction of feed the web 2 - in one or the other direction. The belt tensioner 27 ensures sufficient tension between a parking position and a winding position of the application system 20. FIG. 3 shows the application system 20 and the course of the belt 37 about the inserted winding core 25. In this case, the belt wraps around 37 starting from the pulleys 45 and 35 at least partially the winding core 25. In a remote winding core 25, the belt 37 connects the pulleys 45 and 35 by the shortest route (dashed line). Although in the three preceding paragraphs only one or two levers 31, 31 ^' and 41, 41 ^{' was} spoken, Figure 1 and 4 clearly shows that the application system 20 with the first and the second band feeder 30, 40 of a variety of levers 31, 31 ^' , 31 ^" , 41, 41 ^' , 41 ^" with belt 37 interposed therebetween. The number of levers and the belt depends on the width of the goods, which can be up to 3 m. Another point for the design of the application system 20 with the number of levers and belts is the sensitivity of the web to be processed. The levers with their arranged on the heads pressure elements 38, 48 press elastically on the web 2. Also elastic and flexible over the width of the belt 37, which allow the winding of the web 2 on the winding core 25. In contrast to the prior art with the contact rollers or the winding baskets, the different voltage of the web 2 over the width of the plurality of belts can be adjusted, or due to the elasticity of the belt with the belt tensioners on the width of the web of equal tension on applied to the web, since this may have a different thickness locally due to the manufacturing process.

4 shows the arrangement of the three support plates 23, 23 ^' and 23 ^" between which the levers, rollers and deflection rollers are arranged, and it can be seen that the rollers 36 and 46, as well as the deflection rollers 35 and 35, respectively 45, which are each arranged between two levers, are arranged on one or two common axes, not shown, which are arranged between the support plates 23 and 23 ', or 23 ^' and 23 ^" . The "application from above" of the fabric web to form a roll takes place according to Figure 3, in that the application system 20 is opened by pulling the adjusting means 33 and 43, the levers 31, 41 downwards, so that by the pivot point 32 and 42, the heads 34 and 44 are pivoted away from the winding core 25. The first and second band feeders 30, 40 release the winding core 25. The belt 37 runs only partially around the winding core 25. According to Figure 2, the web 2 is moved over the pinch roller 3 and the Roller 4 passed to the guide rollers 5, 6, introduced from there to the roller 11 in the application system 20. In this case, the web 2 runs from above, ie in a clockwise direction around the winding core 25 in the application system 20. The first band feeder 30 remains in the The belt or belts 37 engage the web 2 and guide it around the winding core 25. In order for the web 2 to complete a complete revolution about the winding core 25, the second belt feeder 40 lays against the winding core 25. To this end, the adjusting means 43 presses the lever 41 onto the winding core 25, as a result of which the belt 37 continues to bear against the winding core 25 and the pressure elements 48 press the material web 2 against the winding core 25. The belt 37 wraps around it with a wrap angle of about 270 ° the winding core 25. So that the beginning of the web 2 is performed as completely as possible, the spring plates are like fingers on the web 2, and press the web 2 on the winding core 25 is a reaches predetermined length of a web to be wound 2, the second belt feeder 40 can be pivoted again in the open position. Due to the two coupling joints 47, the lever 41 can perform only a limited pivoting movement, so that the wound diameter, to which the web 2 is pressed around the winding core 25 by the second belt feeder 40, is limited. In this embodiment, as the winding core 25 with the web 2 to be wound up, a diameter of, for example, 110 mm can not be exceeded. A cutting device 14 (see Figure 2) can after completion of the winding process and the achievement of a predetermined length the web 2 sever.

3, by opening the application system 20. To this end, the adjusting means 33 and 43 pull the levers 31, 41 downwards so that the heads 34 and 34 pass through the fulcrums 32 and 42 and 44 are pivoted away from the winding core 25. The first and second band feeders 30, 40 release the winding core 25. The belt 37 runs only partially around the winding core 25. As shown in Figure 5, the web 2 runs from below, ie in the counterclockwise direction The second band feeder 40 remains in the open position The strap or belts 37 engage the web 2 and guide it around the winding core 25. In order for the web 2 to complete a complete revolution about the winding core 25, The first band applicator 30 presses against the winding core 25. For this purpose, the adjusting means 33 presses the lever 31 onto the winding core 25, as a result of which the belt 37 continues to bear on the winding core 25 and the printing sleeves emente 38 press the web 2 to the winding core 25. The belt 37 thus wraps around the winding core 25 with a wrap angle of over 270 °. In order for the beginning of the material web 2 to be guided as completely as possible, the pressure elements 38, which are here designed as spring plates, lie like fingers on the material web 2 and press the Web 2 on the winding core 25. If a predetermined length of a web to be wound 2 is reached, the first band feeder 30 can be pivoted back into the open position. Since the lever 31 is designed as a two-sided, centrally mounted lever, it can perform a large pivoting movement, so that a large variable aufwickelnder diameter to which the web 2 is pressed around the winding core 25 through the first band feeder 30 is possible. In this embodiment a winding core 25 can be wound with the material web 2 to be wound over a diameter range of 40-120 mm.

Depending on the strength or rigidity of the material web 2, it can also be fed to the winding core 25 in both winding variants via an unillustrated guide plate.

Both band feeders 30, 40 can - in contrast to the prior art - are operated independently of each other, with a winding of a web 2 to a winding core 25 clockwise or counterclockwise is possible. So there are two winding directions possible. Due to the direction of rotation of the web 2 to be wound, the band feeder 30, 40 is in engagement, which points with its head 34, 44 in the winding direction. The second band feeder 40 points with its head 44 clockwise past the winding core 25 and thus wraps the web 2 in the clockwise direction "application from above." The first band feeder 30 points with its head 34 in the counterclockwise direction past the winding core 25 and thus wraps the web counterclockwise "Create from below" on. Even if a band feeder (30 or 40) is not engaged, its head (34 or 44) is used as a deflection point for the belt 37, so that the wrap angle is maximized.

Of course, it is also possible to execute the second belt feeder 40 with a changed lever geometry similar to the first belt feeder 30, so that both belt feeder 30, 40 can realize a variable winding diameter range. However, this embodiment shown here has the advantage that due to the limited pivoting range of the second Bandanlegers 40, the entire application system 20 requires less space, otherwise - according to the increased pivoting range of the lever 41, 41 ^' - the application system 20 further from the frame 7 of the winding machine 1 must be arranged away. This changes the geometric conditions, since the application system 20 is pivotable about the pivot point 21. According to the different customer requirements, a compact winding machine is possible on the different lever system, or a winding machine with variable winding diameter, which can be driven in two embodiments in two winding directions.

According to the embodiment of Figure 1, each band applicator 30, 40 has a plurality of juxtaposed levers and straps. This makes it very easy to adjust the tension across the width of the web. Another advantage is that several strips of webs or a divided into strips web can wrap at the same time.

A further improvement can be achieved in which the deflection roller 35 and 45 is designed with a diameter that is in some cases so large that the deflection rollers 35 and 45 rest on the head 34, 44 of the levers 31, 41 during winding on the web 2, and not more of the belt 37. Although this reduces the wrap angle slightly, it can no longer lead to a possible malfunction due to a jammed belt 37.

reference numeral

1 winding machine

2 web

3 pinch roller

4 roller

5 guide roller

6 guide roller

7 frames

10 cross cutters

11 roller

12 roller

13 roller

14 cutting device

20 application system

21 pivot point

22 actuating means

23, 23 ^' , 23 ^" support plate

24 receiving opening

25 winding core

26 drive roller

27 Belt tensioner

30 first band applicator 31, 31 ^' , 31 ^" lever

32 pivot point

33 actuating means

34 head idler pulley

role

belt

Printing element second tape feeder, 41 ^'41 ^"lever

pivot point

actuating means

head

idler pulley

role

coupling joint

pressure element

Claims

Winding machine for winding webs, in particular for films, comprising a lay-on system (30), which, when winding the web (2) around a winding core (25) in a first direction, at least partially removes the web (2) wraps around, characterized in that the application system (20) comprises a second belt feeder (40) which is adapted to wind the web in a second direction around the winding core (25).

Winding machine according to claim 1, characterized in that the first and second band feeders (30, 40) each have at least two levers (31, 31 ^' or 41, 41 ^' ).

Winding machine according to claim 2, characterized in that the levers are designed as two-sided, centrally mounted lever.

Winding machine according to claim 2, characterized in that the levers (41, 41 ^' ) via two coupling joints (47) are mounted.

Winding machine according to one of the preceding claims, characterized in that the first belt feeder (30) comprises two-sided, centrally mounted levers (30, 30 ^' ), and the second belt feeder (40) via two coupling joints (47) mounted levers (41, 41 ^' ).

Winding machine according to one of the preceding claims, characterized in that on or in the region of the heads (34, 44) of the lever (31, 31 ^' , 41, 41 ^' ), a pressure element (38, 48) is arranged. Winding machine according to one of the preceding claims, characterized in that the application system (20) is arranged pivotably on the winding machine (1).

Winding machine according to claim 1, characterized in that at least one belt (37) is guided circumferentially on the first belt feeder (30) and on the second belt feeder (40).

Winding machine according to claim 8, characterized in that the circulating belt (37) is guided between in each case two levers (31, 31 ^' or 41, 41 ^' ).

Winding machine according to claim 8, characterized in that the circulating belt (37) is designed as an endless belt.

Winding machine according to one of the preceding claims, characterized in that the levers (31, 31 ^' or 41, 41 ^' ) have rotatable deflection rollers (35, 45) on their head.

Winding machine according to claim 11, characterized in that the belt or belts (37) are deflected by the deflection rollers (35, 45).

Winding machine according to claim 6, characterized in that the pressure elements (38, 48) are formed as spring plates.

Winding machine according to one of the preceding claims, characterized in that each belt feeder (30, 40) has its own adjusting means (33, 43).

Winding machine according to one of the preceding claims, characterized in that the levers (31, 3Γ or 41, 4Γ) about a pivot point (32, 42) are pivotable, wherein in each case between two levers (31, 31 ^' bzw.41, 4Γ) a rotatable roller (36, 46) is arranged, which deflects the belt (37).