CN106715300A - Rewinding machine and method for producing logs of web material - Google Patents

Abstract

A rewinding machine comprising a first winding support formed between a first winding roll (1), a second winding roll (3) and a third winding roll (7). The first winding roll and the second winding roll define a nip (5) through which the winding core (A) with the web material (N) being wound around them passes. The rewinder also includes a feed path for the winding cores, which passes between the first winding roll (1) and the third winding roll (7). The second winding stand is formed between the first winding roller (1), the second winding roller (3) and the fourth winding roller (8). The rewinder also comprises a rolling surface (19) extending around the first winding roll (1) and defining a feed channel (21) for the winding core.

Description

Method and rewinding machine for producing rolls of web material

technical field

The present invention relates to a method and a machine for producing rolls of web material, in particular but not limited to rolls of paper, especially tissue paper, such as rolls of toilet paper, kitchen towels and the like.

Background technique

In the field of papermaking, especially for the production of rolls of toilet paper, kitchen towels, etc., large reels (parent reels) of tissue paper coming directly from continuous production machines are wound. These large spools are then unrolled and rewound to produce spools or bobbins with a smaller diameter corresponding to the diameter of the final product intended to be sold on the market. These rolls have an axial length equal to a multiple of the finished reel intended for distribution and sale, and are subsequently cut by a cutting machine to obtain the final product intended for packaging and subsequent sale.

For the production of reels of web material, modern rewinders are prepared to use winding rolls in various combinations and arrangements with suitably controlled rotation to allow automatic production of reels in rapid sequence by continuous feeding of web material. At the end of the roll winding, the roll must be moved away from the winding area and the web material must be severed (by cutting, tearing, etc.) to allow subsequent rolls to start winding. Normally, winding takes place around a winding core, usually but not limited to, made of cardboard, plastic or other similar suitable material. In some cases, the winding takes place around extractable endless mandrels, which are pulled out of the finished bobbin after the winding is complete, to be reinserted into the rewinder for winding Wind subsequent rolls.

In more modern designed rewinders, the winding motion will be applied to the reel formed by means of contact with two or more rollers rotating at a controlled speed. These winders are known as peripheral or surface winders because the winding motion is applied peripherally through contact between the surface of the winding roll and the surface of the roll being formed. Examples of automatic continuous surface winders of this type are disclosed in US Patent No. 5,979,818 and other patents of the same family as well as the patent literature cited in this patent. Improvements to the machine described in this US patent are described in WO-A-2011/104737 and WO2007/083336. In these prior art rewinders, the web material is severed by means of a severing, tearing or cutting member which cooperates with a fixed shaft winding roll, around which the web material is fed, and with a second The winding rollers together define a nip for inserting the winding core into the winding support.

Since the individual steps of the winding cycle of each reel follow each other automatically, these machines are also limited to the feeding of the web material from the production of one reel to the production of the next without interruption and at approximately Continuous and automatic delivery of constant or substantially constant speed. The term "automatic continuous winder" is used in this specification and the appended claims to denote this type of machine.

One of the key steps in an automatic continuous peripheral winder of the type described above is the changeover step, ie the step of cutting the web material, discharging the finished reel and starting to wind the new reel around the new winding core inserted into the winding stand.

Various solutions have been investigated to perform these operations automatically and quickly, for example by using winding rolls rotating at controlled speeds, which are accelerated and/or decelerated synchronously in order to facilitate the correct movement of the finished reel and the new core. In some cases tearing systems are provided in which the web is severed at the end of winding by means of a speed differential. In other cases, the severing of the web material is performed using pressurized air systems, suction systems, mechanical systems, and the like.

WO-A-2012/042549 describes a peripheral automatic rewinder with four rollers. The use of all or at least some of the four rollers with movable shafts allows defining two winding stands and more efficient control of the roll being formed. In certain embodiments described in this document, the web being formed is always in contact with at least three winding rolls, and in some cases it may temporarily be in contact with four winding rolls. This allows a particularly effective control of the winding cycle, the shape of the reel and the winding density to be obtained. In certain embodiments, the web material is severed by lengthening the path of the web material between the two winding rolls. The elongation causes the web material to break, forming a free trailing edge and a free leading edge of the complete roll to start winding subsequent rolls on new cores. Although this machine achieves particularly remarkable results in terms of winding precision and operational reliability, there are certain aspects which can be further improved. In particular, the correct operation and reproducibility of the winding cycle may in some cases depend on the properties of the material being processed, ie the properties of the web material and/or the properties of the winding core.

Contents of the invention

According to the present disclosure, there is provided a rewinder of the automatic continuous peripheral type with four rolls in which rolls of web material are wound around a winding core in rapid sequence without interrupting the feed of the web material, i.e. continuous The web material is fed continuously or substantially continuously to a winding head which, in addition to the winding rollers, comprises means for cutting the web material at the end of each winding cycle.

Here by continuous or substantially continuous feed, an attempt is made to have a feed speed of the web material substantially independent of the winding cycle, it being understood that other factors may even substantially modify the feed speed of the web material. For example, when the parent reel from which the web material is dispensed has to be replaced, or when the web material breaks, it may be necessary to slow down or even stop the feed of the web material to the winder. However, this speed change or stop is not relevant to the winding cycle of a single spool.

According to one aspect, there is provided an automatic continuous peripheral rewinding machine for producing rolls of web material wound around a winding core, comprising between a first winding roll, a second winding roll and a third winding roll The first coiled stent formed between them. The first winding roll and the second winding roll define a nip through which the winding core with the web material wound around them passes. The rewinder may also include a winding core feed path extending between the first winding roll and the third winding roll. Advantageously, there is also provided a second winding stand formed between the first winding roller, the second winding roller and the fourth winding roller. The third winding roll is located upstream of the nip and the fourth winding roll is located downstream of the nip with respect to the direction of feed of the winding core through the nip. The rewinder may comprise a rolling surface for winding the core extending partly around the first winding roll towards the third winding roll. An insertion (ie feed) channel for the winding core is defined between the rolling surface and the first winding roller. In the rewinding machine, a feed path for the web material extending between the first winding roll and the third winding roll and between the first winding roll and the second winding roll may be defined. The rolling surface is constructed and arranged relative to the first winding roll such that the core is fed by rolling in contact with the rolling surface and with web material driven around the first winding roll.

In the context of this specification and the appended claims, the term "winding "Roll" means a motorized roller, i.e. a roller that is rotated in a positive direction by means of a motor to impart a winding motion to the coil being formed by friction between the surface of the winding roller and the mandrel contacting said winding roller cylinder.

The arrangement of the winding rollers is such as to allow the winding of the roll of web material eg by the co-action of three winding rollers in contact with the roll being formed. In addition, the insertion path of the third winding roll with respect to the core and the insertion path of the web material extending between the third winding roll and the first winding roll and through between the first winding roll and the second winding roll The specific arrangement of the nip between the first and second winding supports separates the first and makes it possible to dimension the winding rolls to also handle winding cores of small diameter.

In an advantageous embodiment, the rewinding machine comprises a web material cutting member configured and controlled to cut the web material at the end of the winding of the roll in the second winding support. For example, the cutting member may be configured and controlled to cooperate with the first winding roller.

In certain embodiments, the severing member is configured and controlled to press the web material against the first winding roll and sever the web material by creating a tension in the web material greater than the breaking point of the web material .

In certain embodiments, the rolling surface extends from the inlet of the winding core feed channel to the third winding roller. In this way, the winding core is inserted into the channel, by rolling along said channel and feeding around the first winding roll, wherein the web material between the first winding roll and the winding core is in the channel feed. The path of the winding core then continues between the first winding roller and the third winding roller beyond the insertion channel to reach the first winding support.

In an advantageous embodiment, the rolling surface has an interruption through which a cutting member can pass through the winding core feed channel in order to clamp the web material on the first winding roller. For example, the rolling surface may be formed in a comb-like structure comprising a plurality of shaped laminar elements spaced apart from each other. The shaped layered element edges form the rolling surface of the core. The space between adjacent elements allows the passage of the cutting member. The cutting member may comprise one or more pressors interposed between the laminar elements forming the comb-like structure of the rolling surface.

In some embodiments, the rolling surface can be divided into two parts. The first part may be stationary relative to the load-bearing structure. The second part, which is downstream of the first part relative to the winding core in the feed direction of the insertion channel, can move together with the third winding roller.

In a possible embodiment, at least one of the first winding roller and the second winding roller has a movable shaft to control the distance between the first winding roller and the second winding roller and the Dimensions of the nip between the winding roll and the second winding roll. In certain embodiments, it is preferred that both the first winding roll and the second winding roll have movable shafts. The first winding roll and the second winding roll may have axes that move symmetrically with respect to a centerline plane passing through a nip formed between the first winding roll and the second winding roll.

In other embodiments, the first winding roll may have a fixed shaft and the second winding roll may have a movable shaft to control the size of the nip between the first winding roll and the second winding roll.

The diameters of the four winding rolls can be different from each other. Preferably, it is advantageous if the first winding roller has a larger diameter than the second winding roller.

In certain embodiments, the movement of the first, second, third, and fourth winding rolls during roll formation is controlled such that the first portion of the roll roll is wound between the roll and the first winding roll, second winding roll, and second winding roll. The winding roll is carried out with the third winding roll in contact; the second part of the winding of the reel is carried out after the reel is in contact with the first winding roll, the second winding roll, the third winding roll and the fourth winding roll in contact; the third part of the reel winding is carried out with the reel in contact with the first, second and fourth winding rollers.

According to another aspect, there is provided a method for winding a web material and sequentially forming a roll of said web material wound around a winding core, comprising the steps of:

Four winding rolls are arranged for defining a first winding support between the first winding roll, the second winding roll and the third winding roll, and between the first winding roll, the second winding roll a second winding support between the winding roller and the fourth winding roller;

a rolling surface is arranged extending around the first winding roller and forming therewith a feed channel for the winding core;

feeding the web material around the first winding roll;

inserting the first winding core into the feed channel, and feeding the first winding core along the insertion path between the first winding roller and the third winding roller, and placing the first winding core inserted into the first coil holder;

performing a first part of a winding cycle of the first reel around a first winding core in a first winding support;

transferring the first roll formed from the first winding support into the second winding support through a nip defined between the first winding roll and the second winding roll;

performing a second part of the winding cycle of the first reel in the second winding stand;

At the end of the winding of the first reel on the second winding support, the second winding core is inserted into the feed channel and along the insertion path extending between the first winding roller and the third winding roller path, and insert the second winding core into the first winding holder.

In certain embodiments, the method may comprise the steps of: inserting the second winding core against the first winding roll, clamping the web material between the second winding core and the first winding roll, and Severing the web material between the first roll and the second winding core in the second winding stand.

The method may comprise the steps of: providing a web material severing member; and severing said web material by said severing member acting on said web material, thereby creating a trailing edge of the first roll and for commencing around The second winding core winds the leading edge of the second bobbin. Two edges may be produced between the second core and the first bobbin near completion of winding.

In certain embodiments, the method may include one or more of the following steps: arranging a rolling surface around the first winding roller, defining an insertion channel for the winding core between the first winding roller and the rolling surface , wherein the rolling surface extends from the entrance of the insertion passage for the winding core to the third winding roller; the second winding core is inserted into the insertion passage, and by rolling along the insertion passage, with the rolling surface and with the surrounding The web material driven by the first winding roller is fed contactingly to the second winding core until reaching the third winding roller; passing the second winding core between the first winding roller and the third winding roller; Insert the second winding core and the second bobbin being wound therearound into the first winding support.

A possible implementation of the method according to the invention provides the following steps:

a) inserting the first winding core with the web material entrained around the first winding roll and in contact with the rolling surface towards the first winding support;

b) securing the leading edge of the web material to the first winding core;

c) winding a portion of the roll of web material holding the first winding core in the first winding support and feeding the first winding core towards the second winding support;

d) passing the first winding core and the bobbin being wound therearound through the nip between the first winding roller and the second winding roller, and forming the first winding core and the bobbin being wound therearound and at transferring the wound roll of the finished roll of web material in the second winding stand into the second winding stand;

e) inserting the second winding core with the web material entrained around the first winding roll and in contact with the rolling surface towards the first winding support;

f) cutting off the web material forming the leading edge of the web material by means of a cutting member and discharging the roll of web material from the second winding support;

g) Repeat steps (b) to (f) to form another roll around said second winding core without interrupting the feed of the web material.

Another embodiment of the method according to the invention may comprise the following steps:

a) arranging a third winding roller in an initial position for receiving the first winding core;

b) bringing the first winding core into contact with the web material guided around the first winding roll and accelerating the first winding core at an angle to move it towards the first winding support;

c) securing the leading edge of the web material to the first winding core;

d) feeding the first winding core between the first winding roller and the third winding roller into the first winding stand and winding the web holding the first winding core in the first winding stand part of the roll of wood material and feeding the first winding core towards the second winding support;

e) passing the first winding core and the reel being wound therearound through the nip between the first winding roller and the second winding roller, wherein the third winding roller moves from the initial position towards the first winding roller. the nip between the winding roll and the second winding roll following the bobbin being formed and moving in the first winding support and moving towards the second winding support;

f) transferring the first winding core and the bobbin being formed therearound into the second winding support;

g) completing roll winding of the web material in the second winding support;

h) returning the third winding roller to its initial position;

i) bringing the second winding core into contact with the web material entrained around the first winding roll;

j) with the third winding roller in the initial position, cutting off the web material forming the leading edge of the web material by means of a cutting member, and discharging the roll of web material from the second winding support;

k) Repeat steps (c) to (j) to form another roll around the second winding core without interrupting the feed of the web material.

In yet another embodiment, the method may include the steps of:

arranging a rolling surface around a first winding roller with which a feed channel for the winding core is formed;

At the end of winding the reel, a new winding core is inserted into the feed channel in contact with the rolling surface and with the web material entrained around the first winding roll, and the winding is angularly accelerated in the feed channel Core; insertion of a cutting member into the feed channel downstream of the new winding core causes a break in the web material between the new winding core and the reel near completion of winding in the second winding support.

Description of drawings

The invention will be better understood from the following description and the accompanying drawings, which show non-limiting embodiments of the invention. More specifically, in the attached image:

Figures 1 to 5 schematically show a first embodiment of a rewinding machine according to the invention in an operational sequence;

Figure 6 shows a schematic diagram of a motorized center system for guiding winding cores;

Fig. 7 shows a sectional view according to line VII-VII of Fig. 6;

Figure 8 shows the position of the system of Figures 6 and 7 relative to the set of winding rolls; and

Figure 9 shows another embodiment of a rewinder according to the present disclosure.

detailed description

Figures 1 to 5 show an embodiment of a continuous peripheral rewinder according to the invention and in particular the sequence of operations of the conversion step, namely the discharge of the bobbin whose winding has been completed and the insertion of a new winding core to start the formation Steps for subsequent rolls.

Figures 1 to 5 show the main elements of the rewinding machine, limited to those necessary to understand the concept on which the invention is based and the mode of operation of the machine. Structural details, auxiliary units and other components which are known and/or can be designed according to the prior art are not shown in the figures or described in more detail. Other components can be provided by those skilled in the art based on their experience and knowledge in the field of paper converting machinery.

In short, in the embodiment shown here, the machine, generally designated 2 , comprises a first winding roll 1 with an axis of rotation 1A arranged side by side with a second winding roll 3 with an axis of rotation 3A. Axes 1A and 3A are substantially parallel to each other. Between the two winding rollers 1 and 3 is defined a nip 5 through which (at least during a part of the winding cycle of each reel) the winding reels L1, L2 are fed around which form the winding cores A1, A2 web material N of coils. The path of the web material N extends around the first winding roll 1, partially enveloping it, so that the web material N is in contact with the cylindrical surface of the winding roll 1 on a specific arc of contact which occurs during the winding The cycle duration can vary, as will be apparent from the description of the winding process.

As will be apparent from the description below, the winding core also passes through the winding nip 5 during intermediate steps of the winding cycle.

The winding cores A1 , A2 are inserted into the machine upstream of the nip 5 into a first winding support 6 formed by a first winding roller 1 , a second winding roller 3 and a third winding roller 7 . Reference numeral 7A designates the axis of rotation of the third winding roller 7 , substantially parallel to the axis 1A of the first winding roller 1 and the axis 3A of the second winding roller 3 , respectively.

When the winding core is located in the second winding support 10 downstream of the nip 5 with respect to the direction of feed of the winding core in the winding head formed by winding rollers, the movement of the web material N around the winding core Winding is complete. The second winding support is formed by a first winding roller 1 , a second winding roller 3 and a fourth winding roller 8 . Reference numeral 8A designates the axis of rotation of the fourth winding roller 8 , which is substantially parallel to the axes of the winding rollers 1 , 3 , 7 . Reference numeral 12 denotes a pair of arms pivoting at 12A supporting the fourth winding roller 8 . The double arrow f12 indicates a pivoting movement, ie a reciprocating rotational movement of the arm 12 and thus the fourth winding roller 8 . By moving about the fulcrum 12A, the winding roll 8 can be moved towards or away from the nip 5 defined between the first winding roll 1 and the second winding roll 3 .

In other embodiments, the fourth winding roller 8 may be carried by a system of slides moving on linear guides, rather than by an arm pivoting about a pivot axis. Also in this case, a translational movement along the linear guide allows the winding roller 8 to move towards and away from the nip 5 .

In this specification and the appended claims, the definitions "upstream" and "downstream" with respect to the position of the winding roll refer to the feed direction of the web material and the axial direction of the winding core, unless otherwise specified.

The third winding roll 7 is provided with movement towards and away from the winding nip 5 . To this end, in some embodiments, the third winding roller 7 is supported by a pair of arms 9 pivoted about an axis 9A, so as to oscillate, ie rotate with a reciprocating motion, according to the double arrow f9. In other not shown embodiments, the third winding roller 7 may be supported by a slider moving on a linear guide, so as to follow, for example, a trajectory of linear motion.

Upstream of the winding nip 5, the first winding roll 1 and the second winding roll 3, a core feeder or inserter 11 is arranged, which can be manufactured in any suitable way and feeds the individual winding cores A1, A2 Insertion towards the first coiled support will be described in more detail with reference to the sequence of FIGS. 1 to 5 .

The winding cores may come from a "core winder", ie from a machine for forming winding cores, associated with the transfer line of the web material N into which the winder 2 is inserted, and not shown.

In certain embodiments, the winder includes a rolling surface 19 for winding the core. When in the position of FIG. 1 , the rolling surface 19 may have a substantially cylindrical shape, substantially coaxial with the first winding roller 1 having a movable shaft. The rolling surface 19 may have a step 19G in the middle of its extension. The rolling surface 19 may be divided into a first part 19A and a second part 19B, the first part 19A being upstream of the second part with respect to the feeding direction of the web material N.

The rolling surface 19 and the cylindrical surface of the first winding roller 1 form a feed channel 21 for the winding cores A1, A2. When the first winding roller 1 is in the position of FIGS. Portions can be larger. The purpose of this change in the height of the feed channel 21 is to facilitate the initiation of the rolling movement of each new winding core A1, A2 inserted into the feed channel 21 by the inserter or feeder 11, as will be described below. Explanation. In particular, in the first part of the feed channel 21, the height of the feed channel, ie the distance between the winding roller 1 and the rolling surface 19, may be smaller than the diameter of the winding cores A1, A2.

In certain embodiments, the rolling surface 19 is formed by a comb-like structure in which a plurality of curved plates are arranged next to each other with free spaces between them. Through these free spaces between adjacent plates forming the rolling surfaces 19, cutting members (indicated generally at 23) of the web material N can be inserted. In some embodiments, the comb-like structure forms the first portion 19A of the rolling surface and may be fixed, ie fixed relative to a support structure not shown. In some embodiments, the second portion 19B of the rolling surface may be formed by an element 19C which follows the movement of the third winding roller 7 as it moves with the axis 7A of the third winding roller 7 .

Element 19C may also be a plate forming a comb-like structure.

In other embodiments, the surface 19B may be formed by a single arcuate plate extending transversely with respect to the feeding motion of the web material, ie parallel to the axis of the winding rolls 1 , 3 , 7 .

In some embodiments, the cutting member 23 includes a presser, such as a plurality of pressing members 24 . The cutting member 23 may be provided with a reciprocating rotational movement about an axis 23A substantially parallel to the axis of the winding rollers 1 , 3 . Reference numeral f23 denotes movement of the cutting member 23 . Each pressing member may have a pressing pad 24A. The pressing pad 24A may, for example, be made of an elastically soft material (such as rubber) preferably having a high coefficient of friction.

In a manner synchronized with the movement of the other members of the machine, as will be better illustrated below with reference to the operating cycle, the cutting member 23 is pressed against the first winding roll 1 to clamp the web material N against the pressing member 24 between the pressing pad 24A and the surface of the first winding roller 1 . The latter can have a surface with an annular band with a high coefficient of friction and an annular band with a low coefficient of friction. In this context, the terms "high" and "low" are intended to denote the relative values of the coefficients of friction of the two sets of alternating annular bands. A belt having a low coefficient of friction may advantageously be arranged in the area pressed by the pressing pad 24A of the pressing member 24 . In this way, when the web material N is clamped on the first winding roll 1 by the pinch member 24, it tends to be blocked by the pressing pad 24A, and in the first winding roll 1 having a low coefficient of friction Slide on the endless belt.

Figure 1 shows the final step of the winding cycle of the first reel L1. As shown in FIG. 1 , during this step of the winding cycle of the first reel L1 around the first winding core A1 , the reel L1 is connected with the first winding roller 1 , the second winding roller 3 and the fourth reel The winding roller 8 is situated in contact with the second winding support 10 . The web material N is fed through the nip 5 between the first winding roll 1 and the second winding roll 3 according to the arrow fN around the first winding roll 1 and is wound on the forming 1 , 3 and 8 rotate and are thus held on the reel L1 in the reel stand 10 . Reference numeral 27 designates a guide roll for the web material N located upstream of the winding head defined by winding rolls 1 , 3 , 7 and 8 .

Preferably, the feed speed of the web material N is substantially constant. Substantially constant is intended as a speed that varies slowly with respect to the winding speed, and as being independent of the operations performed by the above-mentioned components of the winding head (which are controlled so as to perform the winding cycle, eject the formed bobbin, insert a new core and A consequence of the fact that the web material is started to be wound onto a new reel at a constant feed speed towards the set of winding rolls, especially towards the first winding roll 1 ).

During the winding of the reel L1, outside of the switching steps which form transitional steps in the operation of the machine, the peripheral speeds of the winding rollers 1, 3, 7 and 8 are substantially the same as each other and the respective winding rollers are in the same direction Rotate upwards, as indicated by the arrows in the figure. In this case, substantially the same means that the speed may be limited by controlling the tightness and tension of the winding of the web material N between the winding roll 7 and the winding roll 8 (for example, counteracting the Variations in tension caused by movement of the center of the spool formed along the path between the winding rollers) vary in need.

In certain embodiments, this difference between the peripheral speeds of the winding rolls may generally be comprised between 0.1 and 1%, preferably between 0.15 and 0.5%, for example between 0.2 and 0.3%, it will be appreciated , these values are examples and not limitations.

Additionally, as explained below, the peripheral speed may vary slightly to induce the forward motion of the roll being formed so that it is transferred from the first winding stand 6 to the second winding stand 10 .

The winding cycle of the roll is as follows.

In Fig. 1 the reel L1 on the winding stand 10 formed by the rollers 1, 3, 8 has actually completed the required amount of winding of the web material N around the first winding core A1. The amount of web material wound may be determined by the length of the roll. The second winding core A2 has been brought to the entrance of the feed channel 21 by the winding core feeder or inserter 11 .

Reference C denotes a continuous line of glue or a series of spots of glue applied to the outer surface of the second winding core A2.

FIG. 2 shows the start of the switching step (ie the discharge of the finished reel L1 ) and the insertion of a new winding core A2 into the winding head formed by the rollers 1 , 3 , 7 , 8 .

The second winding core A2 is inserted by a winding core feeder or inserter 11 into the inlet of the feed channel 21 defined between the first winding roller 1 and the rolling surface 19 .

The position of the first winding roll 1 in this step of the winding cycle is such that it will be coaxial to the substantially approximate cylindrical rolling surface 19 . The distance between this part 19A of the rolling surface 19 and the cylindrical surface of the first winding roller 1 is slightly smaller than the diameter of the winding core A2. In this way, the winding core A2 entering the feed channel 21 is pressed against the rolling surface 19 and against the web material N driven around the first winding roll 1 .

This pressure creates friction between the surface of the winding core A2 and the rolling surface 19 and between the surface of the winding core A2 and the web material N entrained around the cylindrical surface of the first winding roll 1 . As a result of the rotational movement of the first winding roll 1 and the feeding of the web material N, this ensures that the winding core A2 is angularly accelerated to start rolling along the rolling surface 19 by the web material N and the web material N. N is pressed against the first winding roller 1 to press.

Along the second portion 19B of the rolling surface 19, the radial dimension of the feed channel 21 may gradually increase, thereby reducing the deformation of the diameter of the winding core A2 and allowing the winding of the web material N around it to follow the new roll. The subsequent formation of the barrel turns (turn) starts.

Step 19G, if provided, facilitates the initial angular acceleration phase of winding core A2.

During the rolling movement of the winding core A2 within the feed channel 21 , the glue C applied to the winding core A2 is in contact with the web material N thereby bonding the web material N to the winding core.

In this step of the winding cycle, the breaking or cutting of the web material N is also carried out by means of the cutting member 23 . This latter is made to pivot against the first winding roll 1 in order to clamp the web material N against the surface of the first winding roll 1 with the pressing pad 24A. As the winding rolls 1, 3 and 8 continue to rotate to wind the web material N on the roll L1, the web material is stretched by the cutting member 23 on the roll L1 with the web material N against the winding roll 1 between the clamping points.

When the tension exceeds the breaking point, eg at the perforation line of the web material N, the latter breaks to produce a trailing edge Lf wound on the reel L1 and a leading edge Li wound on a new winding core A2. The leading edge Li and the trailing edge Lf are schematically shown in FIG. 3 . In this embodiment of the winding method, when the cutting of the web material N is performed, the winding core A2 passes through the smaller radial dimension of the insertion channel 21 of the winding core A2, ie at the step 19G. In other embodiments, the severing of the web material N may be performed before or after the winding core A2 has passed the step 19G.

In certain embodiments, the winding may be initiated, for example, by electrostatically charging the web material N and/or the winding core A2 or using a suction system, optionally within the winding core A2 provided with suction holes, without using stickies C. In other embodiments, the winding can be initiated with the aid of an air jet. In other embodiments, winding initiation may be obtained or facilitated by appropriate control of the movement of the cutting member 23 . For example, the severing member may be controlled to form N loops of web material, which are wound around a winding core.

Although the movement of the cutting member 23 alternately reciprocates in the sequence of FIGS. 1 to 5 , in other embodiments the movement of the cutting member 23 may always be in the same direction (eg clockwise in the figures). The speed of the cutting member may be controlled such that the web material N is pressed against the mat by rotating the cutting member 23 at a speed such that the pressing pad 24A is fed at a speed lower than the peripheral speed of the first winding roll 1 . Break or cut between the pinch point of 24A and the roll L1 by cutting. In other embodiments, the speed of the pressing pad 24A may be greater than the peripheral speed of the first winding roll 1 . In this case, the breaking or cutting of the web material N can be at the point where the web material N is pinched by the pressing pad 24A and the pinch of the web material N between the first winding roll 1 and the new winding core A2. Do it between tight spots.

In other embodiments not shown, the cutting member may be configured differently and perform the cutting of the web material eg using a blade cooperating with an opposing blade on the first winding roll 1 . In yet other embodiments, the cutting of the web material may be achieved with a cutting member housed in the first winding roll 1 or between the latter and the path of the web material N, configured and controlled to cut The web material acts from the side of the web material N facing the winding roll 1 .

Figure 4 shows a subsequent step in which the second winding core A2 rolling along the rolling surface 19 leaves the rolling surface 19 and comes into contact with the cylindrical surface of the third winding roller 7 located for The winding core is inserted at the end of the channel 21 .

The third winding roll 7 may be provided with a series of annular grooves 7S into which the ends of the plates forming the terminal portion 19B of the rolling surface 19 are inserted. In this way, the winding core A2 is gently transferred from the rolling surface 19 to the surface of the third winding roller 7 .

By rolling on the surface of the winding roll 7 and remaining in contact with the web material N driven around the first winding roll 1, the winding core A2 or more precisely the new roll L2 starting to form there is also connected to The second winding roller 3 is in contact, as shown in FIG. 4 . Thus, in practice, the path of the winding core extends between the first winding roll 1 and the third winding roll 5 and passes through the nip 5 between the first winding roll 1 and the second winding roll 3 .

In order to allow the winding core A2 to be fed along the feed channel 21 , the cutting member 23 is rotated about the axis 23A until it exits the feed channel 21 . The glue C (or other device or means for starting the winding) has caused the web material N to adhere to the winding core A2 so that the web material N begins to be wound on the winding core A2 to start the second roll The formation of the barrel L2, while feeding the core by rolling along the channel 21.

During the above-mentioned operation, for example as a result of a change in the peripheral speed of the rollers 1 , 3 and 8 , the discharge movement of the first roll L1 from the second winding stand 10 starts. In some embodiments, the fourth winding roller 8 may be accelerated and/or the second winding roller 3 may be decelerated so that the roll L1 moves away from the second winding support 10 towards the discharge chute 31 . The fourth winding roller 8 moves upwards to allow the passage of the roll L1 towards the discharge chute 31 .

In Fig. 4, the second winding core A2 is located in the first winding support 6 and is in contact with the first winding roller 1, the second winding roller 3 and the third winding roller 7, while the second winding L2 is forming around there. The finished roll L1 is discharged on the chute 31 . The second winding core A2 passes through a nip or space defined between the first winding roller 1 and the third winding roller 7 before coming into contact with the second winding roller 3 . Next, the winding core A2 and the roll L2 being formed around it also pass through the nip 5 between the first winding roller 1 and the second winding roller 3 as described below.

The formation of the second roll L2 continues through the feeding of the web material N around the new winding core A2 and the consequent increase in the diameter of the new roll L2. The third winding roller 7 can move as the diameter of the second reel L2 increases due to the movement of the arm 9 about the fulcrum or axis 9A. A portion 19B of the rolling surface 19 can follow the movement of the third winding roller 7 in order to hinder the movement of this latter towards the nip 5 between the first winding roller 1 and the second winding roller 3 .

After having carried out part of the winding cycle in the stand 6, the bobbin L2 is moved to the second winding stand 10 as a place where the bobbin winding is complete. For this purpose it is necessary to pass the roll L2 through the nip 5 . To this end, in certain embodiments one or preferably both winding rollers 1 and 3 may be supported by respective arms 1B, 3B, for example so as to pivot about oscillation axes 1C, 3C.

As can be seen in FIG. 5 which shows an intermediate step of passage from the winding support 6 to the winding support 10, the distance between the centers of the winding rollers 1 and 3 is progressively increased, for example by pivoting the arms 1B, 3B. distance between. In other embodiments, the winding rollers 1, 3 may be carried by slides that provide translational rather than pivotal or rotational movement.

Any mechanism for modifying the distance between the centers of winding rollers 1 and 3 , their movement away from each other ( FIG. 5 ) allows the roll L2 to pass through the nip 5 and into the winding support 10 .

In some embodiments, during this step, the third winding roller 7 may gradually move towards the second winding support 10 accompanying the reel L2. In this way, winding continues in contact with at least three winding rollers 1 , 3 , 7 .

Raised to allow the roll L1 to be returned to the nip 5 by the growing fourth winding roll 8 followed by its discharge towards the chute 31 until it comes into contact with the roll L2 fed through the nip 5 . The reel L2 may be in contact with all four winding rollers 1 , 3 , 7 and 8 for part of the winding cycle.

The third winding roll 7 can be moved towards the nip 5 following the reel L2 until it is made to pass beyond the nip between the rolls 1 and 3 . From this point on, the reel L2 can be in contact only with the rollers 1 , 3 and 8 and finished being wound in the second winding stand 10 . The feed movement of the axis of the reel L2 can be suitably obtained by means of the control of the movement of the winding rollers, which move the reel L2 into and through between the rollers 1 and 3 by modifying the mutual position of their axes The area of the minimum distance. Movement can be obtained, for example, by pushing the reel with the third winding roller 7 . In some embodiments, the movement of the mandrel may be facilitated, supported or influenced by a temporary change in the peripheral speed of the winding roller (eg by reducing the peripheral speed of the second winding roller 3 for a short period of time).

While the embodiment shown in FIG. 5 includes a step in which the reel L2 is in contact with the four winding rolls 1, 3, 7 and 8, in other embodiments the third winding roll 7 passes through the nip 5 , beyond the point where the minimum distance between winding rollers 1 and 3 may lose contact with the reel L2 and come into contact with the fourth winding roller 8 . In the embodiment shown, however, better control of the reel is obtained in the various steps of forming, since the reel is always in contact with at least three winding rollers.

The amount of time the second winding core A2 remains in the position of FIG. 5 (ie in the winding stand 6 ) can be controlled simply by the peripheral speed acting on the winding rollers 1 , 3 and 7 and/or the position of the rollers. The second winding core A2 will remain substantially in this position without being further fed for a period of time during which the peripheral speeds of the winding rollers 1 , 3 and 7 remain the same as each other. The subsequent advance is obtained, for example, by decelerating the second winding roller 3, as described above. Thus, it is possible to set as desired the amount of web material N wound around the winding core A2, holding the latter and the second roll L2 formed there around the winding support 1, 3, 7 for the desired time.

Once the reel L2 is positioned in the second winding stand 10, the winding on the second reel L2 continues until the state of FIG. 1 is reached. The third winding roller 7 can move towards the nip 5 to accompany the movement of the reel L2 through the nip on the second winding support 10, and can return to the initial position of FIG. 23 to match.

In certain embodiments, the components of the rewinding machine are structured such that from the time the winding cores A1, A2 are in contact with the three winding rollers 1, 3 and 7 to the time the reel begins to be discharged between the rollers 1, 3 and 8 The path followed by the centers of the winding cores A1, A2 is substantially straight, losing time in contact with the winding roller 7. This allows for more regular winding and combines peripheral winding techniques with axial or central winding to facilitate the use of centers that can be inserted into opposite ends of the winding core to enhance the rotation and progress of the core and mandrel during the winding cycle. Control of movement is eg described in US Patent No. 7775476 and publication US-A-2007/0176039.

With the described arrangement of the four winding rollers and the path of the winding core between the first winding roller 1 and the third winding roller 7, it is possible to provide the first and the second winding roller 1 with a relatively large diameter , 3, and make the intermediate support unnecessary even when the winding core has a small diameter. Nevertheless, the control of the winding cores of small diameter is also ensured with relatively large diameter winding rollers 1 and 3, since the third winding roller 7 can be provided with a smaller diameter. The lower bending stiffness of the third winding roll 7 due to the smaller diameter of this roll can be counteracted using one or more intermediate supports. In some embodiments, the third winding roll 7 may be associated with a support reinforcement beam (which extends parallel to the axis 7A of the third winding roll 7 ) in an area where the The beam is not disturbed by the path of the web material N and the roll L1 , L2 being formed. The beam may for example be positioned at the element 19C, or in a diametrically relative position thereto, i.e. in an area where the third winding roll 7 does not cooperate with the web material N and/or the roll L1, L2 being formed. .

In the embodiment shown in the figures, the first winding roll 1 and the second winding roll 3 have substantially the same diameter, and both are mounted with movable shafts to increase and decrease the size of the nip 5, wherein The roll being formed around each winding core passes through this nip 5 . In other embodiments, the winding roll 1 may be provided with a different diameter, for example larger than the diameter of the winding roll 3 . By increasing the diameter of the winding roll, the support system of said roll can be simplified, since a large diameter size means greater bending stiffness.

Furthermore, in some embodiments only one of the two winding rolls 1 and 3 may have a movable shaft while the other has a fixed shaft. In this way, the number of actuators required for the movement of the various components of rewinding is reduced and the rules for controlling the movement of the winding roller are simplified. If the two winding rolls 1 and 3 have different diameters, it is advantageous that the larger diameter winding roll, eg winding roll 1 , has a fixed shaft and the smaller diameter winding roll has a movable shaft. In this configuration, the winding sequence of the web material around the winding core does not change. The winding starts in the winding stand 6 and ends in the second winding stand 10 after the passage of the reel being wound through the nip 5 .

In yet a further embodiment, the winding rollers 1 and 3 can be both movable and asymmetrically movable.

In certain embodiments, the above-mentioned rewinding machine may be provided with a system of motorized centers which, at least in their travel, are upstream of the nip 5 by the winding support 6 defined by the rollers 1 , 3 and 7 and downstream of the nip 5 by The rolls 1 , 3 and 8 engage, guide and control the winding core during the part between the winding support 10 formed.

The centering system may comprise a center 101 on each side or side member of the machine for engaging the respective ends of the winding cores A1 , A2 inserted into the winding zone. Figures 6 and 7 illustrate one of these centers and the associated operating mechanism.

The center 101 may have a rod 103 with a head 105 at the end. The head 105 end may have a mechanism to engage the tubular winding core. In some embodiments, the head 105 may engage the winding core by being inserted therein. The head 105 may have an expandable member to torsionally engage the winding core. In certain embodiments, the expandable member comprises an expandable ring 107, eg pneumatically expanded by a compressed air feed system. Compressed air may be delivered through conduit 109 .

The center 101 can be provided with a translational movement parallel to the longitudinal axis X-X of the center according to arrow f101.

An actuator such as a piston cylinder actuator 111 may be used to control the reciprocating translational movement according to the double arrow f101. This movement allows the heads 105 of the opposite center 101 on both sides of the machine to move towards each other until the heads 105 engage the ends of the respective winding cores A1 , A2 located in the winding area. It is possible for the head 105 to partially or fully penetrate the end of the winding core.

As can be seen in particular in FIG. 6 , each center 101 may be provided with a motor 115 , for example an electrically controlled electric motor, which rotates the respective center 101 about its axis X-X. Motion may be transmitted from the motor 115 to the center 101 by means of a belt 117, eg a toothed belt. A toothed belt 117 can be driven around a pulley 119 torsionally constrained to the rod 103 of the respective center 101 . More specifically, the pulley 119 can be fitted into a sleeve 121 within which the rod 103 of the center 101 can slide according to the double arrow f101, wherein the sleeve 121 is torsionally coupled to the rod 103, for example by grooved sides or the like . The sleeve 121 may be supported by means of a bearing 123 in a bushing 125 which may be carried by a slide 127 .

The slide 127 may be mounted in a fixed guide 129, ie integral with the load-bearing structure of the rewinder. In this way, the slider 127 can translate in the direction defined by the guide 129 according to the double arrow f127. In some embodiments, the rectilinear alternating motion according to f127 may be imparted by a motor 131 , such as an electrically controlled electric motor. Electric motor 131 may cause oscillation of crank 133 from which motion is transmitted to slider 127 through link 135 articulated to slider 127 at 135A and to crankshaft 133 at 135B.

During the above-mentioned winding process, when the movement according to the double arrow f127 is transferred from one to the other of the two winding supports determined by the three-roller set 1,3,7 and the three-roller set 1,3,8, according to the double-arrow The movement of f127 may be substantially rectilinear and parallel to the movement of the center of the winding cores A1, A2. The center 101 can be engaged with the winding cores A1, A2 when it is in the winding support 6 upstream of the nip 5, and can be disengaged from it when the reel L1 is almost complete, according to particular reference to FIGS. 3 and 4. The steps shown in the above description allow for this latter expulsion.

As a result of the torsional coupling between the head 105 of the center 101 and the winding cores A1, A2, during the movement according to the double arrow f127, and more specifically during the step of the upward movement (in the figure) of the center 101, These accompanies the winding core as the roll L1 grows in diameter, while the motor 115 imparts a rotational movement to the center 101 by means of a belt 117 which is transmitted to the winding core and thus to the roll being formed. The rotational speed imparted by the motor 115 can be controlled to be consistent with the peripheral speed of the spool L1 being wound.

The use of the center 101 allows better winding control and better advancement of the roll L1 from one of the two winding stands 6 , 10 to the other and through the nip 5 during all steps of the winding cycle.

In the embodiment shown in Figures 1 to 8, the first winding roll 1 and the second winding roll 3 have substantially the same diameter and can both have a movable The passage of the core and the web is facilitated during the first winding step of the second winding support 10 . In other embodiments, the first winding roll 1 and the second winding roll 3 may have different diameters, and the first winding roll 1 may preferably have a larger diameter than the second winding roll 3 .

In a possible embodiment, one of the winding rollers 1 and 3 may have a fixed shaft and the other a movable shaft.

Preferably, the first winding roll 1 around which the web material N is wound may have a fixed shaft and have a larger diameter than the second winding roll 3 .

Figure 9 shows this type of construction. The same reference numerals designate the same or equivalent parts as those described with reference to FIGS. 1 to 8 . Specifically, the four winding rolls are indicated with 1 , 3 , 7 and 8 . Around the first winding roll 1 , a channel 21 for the insertion of the winding cores A1 , A2 is formed. This channel is delimited by the cylindrical surface of the first winding roll 1 and a rolling surface 19 extending around the first winding roll 1 and towards the third winding roll 7 . The winding core is inserted into the channel 21 so as to be in contact with the rolling surface 19 and entrains the web material N around the first winding roll 1 . The rolling surface 19 may have an intermediate step, as shown at 19G, in order to facilitate the winding of the core angle after the severing by means of the severing member 23 of the web material N in the same manner as has been described above. Acceleration and web material gripping. Such a cutting member 23 of web material cooperates with a first winding roll 1 of web material clamped between the first winding roll and one or more pressing members 24A carried by the cutting member 23 .

The axis of rotation 1A of the first winding roll 1 is fixed relative to the load-bearing structure of the machine 1 in order to allow the feeding of the web material N to the nip 5 between the first winding roll 1 and the second winding roll 3 More stable and easier to control.

In this embodiment, the diameter of the second winding roller 3 is substantially smaller than the diameter of the first winding roller 1 . For example, the diameter of the second winding roll 3 may be less than half the diameter of the first winding roll 1 . The second winding roll 3 may be supported by lateral members 4 as schematically shown in FIG. 9 . An intermediate support may be arranged between the lateral members 4, which supports the second winding roller 3 in an intermediate position between the ends of the latter. In this way it is possible to design the second winding roll 3 with a small diameter.

In order to obtain a sufficiently rigid second winding roll 3 , the side members 4 and any intermediate supports may be constrained to the cross beams 14 .

The shaft 3A of the second winding roller 3 may be movable and pivot to the load-bearing structure of the rewinder 2 about a pivot axis defined by the pivot point 16 of the side member 4 . The pivotal movement of the second winding roller 3 can be controlled by a motor 18 associated with a crank 20 . The link, also pivoted on 22B to the respective side member 4, may be pivoted to the crank 20 on 22A. The reciprocating rotational movement of the motor 18 pivots the axis 3A of the second winding roll 3 about the axis defined by the pivot point 16 . In certain embodiments, two symmetrical motors 18 may be provided to act on two opposite side members 4 . Between the side members 4 a chute 31 or a part thereof can be fixed so that said chute 31 can follow the movement of the second winding roller 3 .

The third winding roll 7 is carried by side members 32 constrained to cross beams 34 and pivots at pivot point 36 to the fixed structure of the rewinder 2 . The intermediate support may be integral with the beam 34 to support the third winding roll 7 at an intermediate point between its two ends supported by the side members 32 . The pivoting of the third winding roller 7, i.e. the translational movement of its axis of rotation 7A to follow the movement of the winding core and the bobbin being formed, can be done by means of a link-crank system constrained to the beam 34 in 46A 44, 46 are applied by the motor 42.

Part 19C of the rolling surface 19 may be constrained to the side member 32, a part of which may in this way follow the translational movement of the third winding roller 7 during the various steps of the winding cycle.

The operating sequence of the machine 2 of Fig. 9 is substantially the same as that described with reference to Figs. 1 to 5, and therefore will not be described in detail. FIG. 9 shows the completed bobbin L1 ready to be discharged from the second winding stand 10 with the second winding core A2 already inserted in the first winding stand 6 between the winding rollers 1 , 3 , 7 . The operating states shown in Figure 9 can actually take place in the machine, but this is not essential. Depending on the type of adjustment, it may also happen that the second winding core A2 only reaches the position of FIG. 9 when the bobbin L1 has been ejected from the second winding stand 10 . The passage of the second winding core A2 with the reel being formed around it through the roller defined by the first winding roller 1 and the second winding roller 3 is allowed or facilitated by moving only the shaft 3A of the second winding roller 3 gap 5, while the shaft 1A of the first winding roll 1 remains stationary with respect to the structure of the machine. In this way, the operation of the rewinder is made more uniform, especially without modifying the path of the winding material upstream side of the nip 5 .

A further advantage of the embodiment of Fig. 9 is that the handling of the cutting member 23 of the web material N is simplified. In fact, it cooperates with the winding roller 1 whose axis of rotation is stationary, thus simplifying the control of the cutting-off step of the web material N.

The use of a first winding roll 1 of larger diameter makes it possible to avoid the need for an intermediate support of the first winding roll 1 , thereby simplifying the construction of the machine and improving the quality of the roll.

Claims (23)

1. a kind of automatic continuous peripheral rewinding machine, the reel for producing the web material around winding core winding, including：

First winding cradle, it is formed between first winding roller, second winding roller and the 3rd take-up roll；First winding roller and Two take-up rolls limit the roll gap that winding core is passed through together with the web material wound just around it；

Second winding cradle, it is formed in first winding roller, second winding roller and Volume Four between roller；It is logical relative to winding core The direction of feed of roll gap is crossed, the 3rd take-up roll is placed on solid non-ferrous, and Volume Four is placed on roll gap downstream around roller；

Rolling surface, it extends around first winding roller and the feeding of restriction winding core is led between rolling surface and first winding roller Road；Rolling surface is configured and arranged to relative to first winding roller so that winding core is by with rolling surface and around The web material of one take-up roll entrainment contiguously rolls to feed.

2. the cut-out component of rewinding machine as claimed in claim 1, including web material, it is constructed and controls and is formed in volume Two Reel in support cuts off web material at the end of winding.

3. rewinding machine as claimed in claim 2, wherein, cut-out component is constructed and controls into be made jointly with first winding roller With.

4. rewinding machine as claimed in claim 2 or claim 3, wherein, cut-out component is constructed and controls into and pressed from both sides against first winding roller Tight web material and web material is cut off, the bigger tension force of the breakaway poing of producing ratio web material in web material.

5. rewinding machine as claimed in claim 4, wherein, cut-out component is constructed and controls into and is breaking at introducing winding core feeding Between the new core of passage and the reel formed just in the second winding cradle and preferably cut-out component with just volume Two around Web material between the reel formed in support.

6. the rewinding machine as described in one or more in claim 2 to 5, wherein, cut-out component is constructed and controls into Enter winding core feeding passage and match somebody with somebody with first winding roller at the point in the downstream of the winding core being inserted into winding core feeding passage Close.

7. the rewinding machine as described in one or more in preceding claims, wherein, rolling surface prolongs from feeding feeder connection Reach the 3rd take-up roll.

8. the rewinding machine as described in one or more in preceding claims, wherein, take-up roll is arranged and controls into execution First of reel winding between first winding roller, second winding roller and the 3rd take-up roll, in the first winding cradle Point, and in first winding roller, second winding roller and Volume Four between roller, reel in the second winding cradle winding Decline.

9. rewinding machine as claimed in claim 8, wherein, the 3rd take-up roll and Volume Four have a movable axle around roller, and Drum diameter increase and from the first winding cradle be transferred to the second winding cradle the step of during, be controlled so as to follow the fortune of reel Move and orthogonally moved around the axle of roller with the 3rd take-up roll and Volume Four.

10. the rewinding machine as described in one or more in preceding claims, wherein, the first winding roller and volume Two around At least one of roller has movable axle, with control the distance between first winding roller and second winding roller and the first volume around The size of the roll gap between roller and second winding roller.

11. rewinding machine as described in one or more in preceding claims, wherein, first winding roller has fixing axle, and Second winding roller has movable axle, and wherein, first winding roller preferably has the diameter bigger than second winding roller.

The rewinding machine as described in one or more in 12. such as claim 1 to 10, wherein, first winding roller and second winding roller Movable axle is respectively provided with, with preferably in a symmetrical away from each other and close.

13. rewinding machine as described in one or more in preceding claims, wherein, reel wind during the first volume around Roller, second winding roller, the 3rd take-up roll and Volume Four are controlled such that around the motion of roller：The Part I of reel winding is in volume Cylinder is carried out in the case of being contacted with first winding roller, second winding roller and the 3rd take-up roll；The Part II of reel winding is in volume Cylinder with first winding roller, second winding roller, the 3rd take-up roll and Volume Four around roller contact in the case of carry out；The of reel winding Three parts are carried out in the case where reel and first winding roller, second winding roller and Volume Four are contacted around roller.

14. rewinding machine as described in one or more in preceding claims, wherein, rolling surface is included relative to rewinding machine The Part I fixed of supporting construction and the part moved together with the axle of the 3rd take-up roll.

15. rewinding machine as described in one or more in preceding claims, including a pair of allocation centers, it is constructed and cloth It is set to and is engaged with winding core during at least a portion Winding Cycle, the allocation center follows winding core between take-up roll Feed motion.

16. rewinding machine as described in one or more in preceding claims, wherein, web material around its powered The diameter with diameter greater than, preferably at least twice second winding roller of one take-up roll.

17. rewinding machine as described in one or more in preceding claims, wherein, first winding roller has relative to rewinding The axle that the load-carrying members of machine are fixed, and second winding roller has the structure movable axie relative to machine, with permission or just In the roll gap that the reel for being formed passes through the restriction between first winding roller and second winding roller.

18. it is a kind of for coil web material and sequentially form around winding core winding the web material reel side Method, comprises the following steps：

First winding roller around the first winding cradle formed by first winding roller, second winding roller and the 3rd take-up roll feeds Web material, first winding roller and second winding roller limit the second winding cradle with Volume Four around roller；

By the first winding core be inserted in first winding roller and around first winding roller extend rolling surface between formed feeding In passage, and winding is fed by contiguously being rolled with rolling surface and around the web material that first winding roller is carried secretly Core, and along between first winding roller and the 3rd take-up roll insertion path feed the first winding core, and by the first volume around Core is inserted into the first winding cradle；

The Part I of the Winding Cycle of first winding core of first reel in the first winding cradle is performed,

The first reel that will be being formed by between first winding roller and second winding roller limit roll gap from the first volume around Support is transferred to the second winding cradle；

Perform the Part II of Winding Cycle of first reel in the second winding cradle；

At the end of winding of first reel in the second winding cradle, by the second winding core be inserted into feeding passage and along Insertion path between first winding roller and the 3rd take-up roll, and the second winding core is inserted into the first winding cradle.

19. methods as claimed in claim 18, comprise the following steps：

The second winding core is inserted against first winding roller, to be clamped in the web material between the second winding core and first winding roller Material, and it is breaking at the web material between the first reel in the second winding cradle and the second winding core.

20. method as described in claim 18 or 19, comprises the following steps：

Acted on to cut off web material on web material with cut-out component, so as to produce the trailing edge of the first reel and for starting The leading edge of the second reel is wound around the second winding core.

21. methods as claimed in claim 20, comprise the following steps：

It is clamped in the web material between cut-out component and the first roller.

22. method as described in claim 20 or 21, it is further comprising the steps of：

In the step of forming reel, the 3rd take-up roll is set to be moved towards the roll gap between first winding roller and second winding roller； When reel is in be contacted around roller with Volume Four, the 3rd take-up roll is set to be moved from roll gap and be arranged in and the cut-out structure The position that part coordinates.

The method as described in one or more in 23. such as claim 18 to 22, wherein, in the Part I and volume of Winding Cycle Between the Part II of circulation, the center section of Winding Cycle is performed, wherein the reel for being wound is in and the first volume Contacted around roller and move across first winding roller and second winding roller around roller, second winding roller, the 3rd take-up roll and Volume Four Between roll gap.