RU2489341C2 - Winding device for bag making machine (versions) and method of winding packets - Google Patents

Abstract

FIELD: packaging industry.

SUBSTANCE: group of inventions relates to a method of winding packets and to the winding device of the bag making machine. The winding device comprises a feeding gripper unit, a part of the winding, a guide of the film, and a spindle. The gripper unit is formed between the first and second feeding rollers. The guide is recessed in the first feeding roller. In implementing the method of winding the film is directed along the surface of the first feeding roller to the feeding gripper unit. The film is directed to at least the first part of winding. The packets are wound in the part of winding.

EFFECT: increased speed of work of the winding device is provided.

25 cl, 5 dwg

Description

FIELD OF THE INVENTION

The group of inventions relates generally to the manufacture of bags. In particular, the invention relates to the manufacture and winding of bags.

State of the art

Many types of bag making machines are known to be used to make continuous film bags, such as polyolefin films. Commercially available bag making machines, winders, and folding machines include CMD ^® Models, 3113, 1100, 1500, 4013RO, and others, as described on www.cmd-corp.com. Examples of known patents for bag making machines include US Pat. Nos. 6,117,058, 4,934,993, 5,518,559, 5,587,032 and 4,642,084 and Patent Publication 20060084559 (each of which is incorporated herein by reference).

Typically, these machines unwind the film from a roll. The film may be a single layer film, or a folded film, or a sleeve film. Packages are formed by applying welded seams to the film in the right places. Welds can form the bottom / top and / or sides of the bag. Perforation can be made to indicate the sides and / or top / bottom of adjacent bags. Other operations may also be performed, such as separation and / or folding.

The bag making machine disclosed in US Pat. No. 6,117,058 belongs to the owner of this application. The rotary bag making machine known from the said patent continuously processes the film or web using a unit with floating rollers, a pair of feed rollers to the drum, a welding drum, a pair of exhaust rolls from the drum, a pressing web, a pair of feed rollers to the cutter, a cutter (this can be any device web processing, for example, a puncher, a cutter, a cutting knife, a punching device, a folding device), a pair of tap rolls from the cutter and a controller. The input section or the unwinding section, in this example, includes a part of the bag making machine where the web enters, for example, a roll unwinding unit and a unit with floating rollers. The output section, in this example, includes nodes for processing the web after applying welds to it, for example, punchers, winders, folding devices, etc.

The canvas is fed to the drum through a node with floating rollers. There is a group of welding strips on the drum. The welding strips are heated and create welds forming packages from the web. The canvas is pressed against the drum (and welding strips) with a Teflon ^® coated fabric. Packages made sequentially one after another are formed by one weld seam on the drum, and packages located during manufacture across the web are formed by two welds. The diameter of the drum can be changed and / or not all welding strips can be included to specify the distance between the welds, and hence the size of the package.

As a rule, in rotary machines, a circular knife located below, in the direction of movement of the film, is set so as to perforate between two welds, or behind the seam. In the known machine, according to the patent US 6117058, after the blade comes off the drum, it goes to the circular knife, which creates a perforation between the packages, or separates adjacent packages. When the fabricated bags are arranged one after another, the perforation is placed near a single weld in such a way that when the packages are separated, the perforation and the perforated end are the top of one package, and the weld is the bottom of the adjacent package.

The controller is connected to various nodes to control speed, position, etc. Sensors that distinguish printing on the surface of the web when forming welds and / or combining perforation (applying perforation in the right place) with the weld can be used. In addition, sensors can detect welds for perforation in the right place.

In many bag making machines, a winder is installed after the cutter. Examples of known winding device patents are US Pat. Nos. 4,667,890, 4,695,005, 6,186,436 and 5,899,403, incorporated herein by reference. Known winding devices use either a rotating turret with several spindles, or a single spindle that does not change its location, and a web retainer. The required number of packets is wound onto the spindle, forming a roll. The roll then collides, often using the paw of the pusher. The roll may be tied with paper tape, and defective rolls may be discarded. Known documents describe various methods of how to orient the leading end of the roll film to the desired spindle, and how to control winding.

In known multi-spindle winding devices, it is necessary to rotate the turret to move the spindle to its initial position and to the winding position. This complicates the machine, and complicates the pneumatic connections. In addition, since the turret rotates, it uses a paw of the pusher, which cleans the spindle only on part of its circumference. Moreover, moving turrets, paws, and air guides can interfere with each other or be damaged. Stationary winders have speed limits since it takes time to remove the roll. Known winding devices generally cannot be used with pneumatic devices in machines at speeds of more than 30 cycles per minute. On the contrary, for the operation of such a winding device, providing 40 cycles per minute, you will need a servo.

Thus, a winding device with stationary spindles is required, operating at a higher speed than existing single-spindle systems. In a preferred embodiment, such a winding device can be used with pneumatic devices and can easily use pneumatic connections.

Disclosure of invention

According to a first aspect of the invention, the winding device for a bag making machine may include a picking up unit formed between the first and second feed rolls, a winding section, at least a first film guide located along the film supply path at least along an arc to the pickup pickup unit and a first spindle located along the film supply path, comprising a film supply path of the first spindle, in which the film approaches the first feed roller, follows the first feed roller in an arc of at least 10 ° to the feed pickup unit, then goes to at least one winding section, and along the film feed path below, in the feed direction, from the pickup pickup unit, at least one film guide may be recessed in the first feed roller at least in an arc.

At least the first film guide can be fixedly mounted and recessed in the first feed roller at least in an arc, with the possibility of touching at least the first film guide and the first feed roller.

According to an embodiment of the invention, at least the first film guide may be provided with a surface and recessed in the first feed roller on the pick-up feed assembly so that the surface of at least the first film guide closest to the film feed path is lower than the surface of the first feed roller closest to the film feed path.

The arc can be at least 60 ° or at least 90 °.

The device may further include a second spindle, wherein the film supply path of the first spindle may be a first selected film supply path, after which the film, after exiting the pick-up feeding unit, follows the first selected film supply path to the first spindle and is wound onto it, and the route the film feed contains the film feed path of the second spindle, which is the second selected film feed path, and the second spindle can be located on the second selected route n cottages film on which the film after exiting the delivery unit must capture to capture the second film feed the selected route to the second spindle and is wound onto it.

In addition, the invention may further include a rotating brush located at the location of the film supply route along the first selected route, when the brush rotates clockwise, or along the second selected film supply route, when the brush rotates counterclockwise.

Also, the winding device may further include an increased speed gripping unit formed between two rollers with an increased speed located along the film supply path lower in the feed direction from the gripping feed unit and higher in the feed direction from the first and second selected film supply routes, in which the film follows from the feed capture unit to the capture unit of increased speed, to a rotating brush, and along the first or second selected film supply path.

Additionally, the invention may include a first air source directed at least partially in the first transverse direction to the film supply path and the first side of the film, by which a portion of the film deviates from the film supply path and pulls excess film to overlap adjacent packages.

The device may further include a second air source directed at least partially in the second transverse direction to the film supply path and the second side of the film, whereby the second part of the film deviates from the film supply path and pulls excess film to overlap adjacent packages.

Said first and second air sources may be located higher in the feed direction from the rotating brush and lower in the feed direction from the high speed gripping unit.

According to an embodiment of the invention, the device may further include at least a first rod located in the area of the first spindle to remove the defective packages, and at least a second rod located in the area of the second spindle for removing the defective packages.

At least the first film guide may be at least three film guides.

The winding device may further include at least a second film guide located along the film supply path from a place higher in the feed direction from the pick-up pick-up unit to a place in the region of the pick-up pickup unit of increased speed, and from the opposite side of the film from at least the first film guide.

According to a second aspect of the invention, a method for winding continuous film bags may include guiding the film by means of a first feed roller and at least a first guide film recessed in the first feed roller along the surface of the first feed roller in an arc of at least 10 °, film direction by at least a first guide film and a first feed roller to a pickup feed assembly formed between the first and second feed rollers, directing the film to at least ervomu section winding and winding packets on the first winding section.

When the film is guided by the first feed roller and at least one guide film, the film can come into contact with at least one film guide and the first feed roller at least in an arc.

Also, when the film is guided by the first feed roller and at least the first film guide, it can be guided along the surface of the first feed roller by at least an arc of 60 °.

In addition, when the film is guided by the first feed roller and at least the first guide film, they can guide it along the surface of the first feed roller at least in an arc of 90 °.

The method may further include directing the film to the second winding portion and winding the packets in the second winding portion, wherein the film may be guided to the first winding portion prior to winding the first packet roll, and may be directed to the second winding portion prior to winding the second packet roll.

According to an embodiment of the method, it may further include rotating the brush clockwise, whereby the film can be directed to the first winding portion, and rotating the brush counterclockwise, whereby the film can be directed to the second winding portion.

The film may be a sequence of packages formed by welds and perforations, which are separated from adjacent by supplying the film to the capture unit increased speed.

The method of winding packages may further include directing the air flow onto the film in a first transverse direction to the first side of the film, whereby a portion of the film is deflected from the film supply path, the excess film is pulled, and adjacent packets are overlapped.

Also, the method may further include directing the air flow to the film in a second transverse direction to the second side of the film, opposite the first transverse direction, through which part of the film can be deflected from the film supply path, stretch the excess film and overlap adjacent packets.

In addition, the method may further include moving the rods to remove defective packages.

When directing the film by means of at least the first guide film and the first feed roller to the feed pickup unit, it is possible to direct the film between at least the second guide film and at least the first guide film.

According to an embodiment of the invention, a winding device for a bag making machine is claimed, which may include a pick-up feeding unit formed between two feed rolls, a first spindle located along the first selected film supply path, in which the film, after exiting the pick-up feeding unit, follows the pick-up the first selected film supply path to the first spindle and wound on it, and a second spindle located along the second selected film supply path in which the film is last output from the input node should capture to capture the second film feed the selected route to the second spindle and is wound onto it.

In accordance with a third aspect of the invention, bag making machines include an unwinding section, a forming section, and a winding device. The winding device includes a feed capture unit and two spindles, each of which is located in the corresponding selected film supply path.

In one alternative embodiment, the spindles are fixed position spindles.

In other embodiments, the selected film supply routes are predominantly downstream.

Between the feed capture unit and the selected film feed path, a higher speed capture unit can be used.

The high speed capture unit, in various embodiments, operates in intermittent mode and in step-by-step mode and / or has a user-controlled increased speed.

In other embodiments, between the feed capture unit and the selected film supply routes, the winder includes an overlap joint. The lap joint may include several rods moving along a planetary trajectory that crosses the film supply path in at least two places. The trajectory in the general case can be elliptic.

In other embodiments, the lap assembly includes multiple air nozzles.

At the high speed capture unit, the air nozzles are arranged to direct the film along one of the selected film supply routes, and the other air nozzles are located so as to direct the film along the other selected film supply route.

In alternative embodiments, the winder includes belt conveyors along selected film supply routes. Belt conveyors can swing relative to the end closest to the feed pickup assembly.

In various embodiments, the winding device includes an electrostatic clamp in selected film supply routes, which may be bipolar.

In other embodiments, the winding device includes pop-up fingers located along selected film supply routes.

In various embodiments, the winding device includes, in the vicinity of the spindles, a strapping device for tying paper tape.

In one embodiment, the winding device is driven by compressed air.

In other alternative embodiments, the winding device includes colliding devices that clean the spindles substantially in full circumference.

According to a fourth aspect of the invention, a winding device for a bag making or film making machine includes a picking feed unit, a guide or guide films, and a spindle or spindles. The film approaches the falling capture unit, following the surface of the feed roller along an arc of at least 10 °. In this case, the film supply path passes through the capture to the spindle. The film guide is located along the film supply path at least along an arc along which the film is wrapped around the feed roller, and further along the film supply path downward in the feed direction from the falling pickup assembly. The film guide is recessed in the feed roller at least along this arc.

According to a fifth aspect of the invention, when performing the method of winding continuous film bags, the film is guided by the first feed roller and at least one guide film recessed in the first feed roller along the surface of the first feed roller in an arc of at least 10 ° then direct the film to at least one winder, and wrap the bags.

In one embodiment, the film guide is stationary and is in contact with the film in an arc.

In another embodiment, the film guide is further deepened below the surface of the roller on the falling gripping unit.

The arc, in various embodiments, is at least 45 °, 60 °, and 90 °.

In another embodiment, the winder includes a second spindle, and each spindle is in a selected film supply path.

In another embodiment, at a place where the film supply path may follow any of the selected film supply routes, a rotating brush is disposed to guide the film along the selected route.

In other embodiments, an elevated velocity capture unit is located on the film supply path below the pickup feed unit and above the brush, and / or the air source directs the air flow to the film on one side and / or on the other hand, and deflects the film from the film supply path, to pull off excess film to connect adjacent overlap packets. In another embodiment, the air sources are located upstream from the rotating brush, and below the high speed capture unit.

In another embodiment, a finger / guide is disposed adjacent to the spindle or spindles to remove defective bags.

In another embodiment, three film guides extend along the film.

In another embodiment, the second film guide is located on the opposite side of the film.

According to a sixth aspect of the invention, the strapping device for the bag making machine includes a conveyor for feeding the tape to the spindle and two air sources. The tape approaches the spindle from the first direction and passes over the spindle and wraps around a roll of packages wound around the spindle. One air source directs air to support the tape as it approaches the spindle. Another air source directs the air so that it presses the tape around the roll of packets when the tape passes over the spindle, helping the tape wrap around the roll. One air source also supports the tape as it wraps the roll of packages, thereby helping the tape to wrap around the roll.

In an alternative embodiment, the first air source is mounted on an air guide device, the fastening of which allows it to be brought closer to the spindle or removed from the spindle.

Other important features and advantages of the invention will be apparent to those skilled in the art upon reading the following drawings, detailed description, and appended claims.

Brief Description of the Drawings

Figure 1 presents a schematic illustration of a known bag making machine;

Figure 2 presents a schematic illustration of a winding device in accordance with the present invention;

Figure 3 presents a schematic illustration of a winding device in accordance with the present invention;

Figure 4 presents a schematic illustration of a strapping device in accordance with the present invention;

5 is a schematic illustration of a feed roller, in accordance with the present invention.

The implementation of the invention

Although the present invention will be described with examples of a particular bag making machine, method and winding device, it should be understood from the very beginning that the invention can also be implemented with other machines, methods and winding devices, including machines for making bags for drawn out braid, rotary machines with overlap, intermittent motion machines, film making machines and other well-known machines.

In General, the present invention is described in relation to a winding device that can be used with a known bag making machine or to be part of it, to create rolls of bags to simplify the operations of packaging, transportation, distribution and use. A preferred embodiment is described with reference to a bag making machine, for example, presented in US Pat. No. 6,117,058, either commercially available under the name CMDA 1270, or a modular bag making machine. The invention can be implemented as a winding device, a winding device and a separator, a winding device, a separator and an overlap device, or as a bag making machine as a whole. In the present invention, the lap joint device includes an assembly or sections in which overlapping packets are overlapped. The bag making machine in front of the winding device is described below, and may represent the known machine mentioned previously. Other bag making machines may also be used.

The formed packets enter the winding device in the form of a film and can be divided there using a high-speed capture unit. The high speed capture unit includes a capture in which at least one drive roller has a peripheral speed exceeding the speed of the film prior to capture. The capture can work in single-step mode ("each packet" mode), or in intermittent mode, to separate packets only at the beginning / end of the rolls. In this invention, a step-by-step mode includes processing each packet in a roll. Intermittent mode, in this invention, does not provide for the processing of each packet in a roll, but only, for example, at the beginning or end of a roll, or several packets in a roll. In step-by-step mode, packet overlap may occur.

After separation, the film abstraction device directs the film to one of the two spindles. Each rotating spindle wraps the film in turn, which eliminates congestion and ensures work with high speeds, high speeds of rotation and rolls with fewer packets. The film is guided by a retraction device along one of the two selected film supply routes to one of the two spindles or winding devices. In this description, the film supply path is the path that the film passes through a bag making machine or winder, except where the film accumulates for winding. The selected film supply route, in this description, includes the route of the film or packets during part of the operating time of the winding device.

In a preferred embodiment, the selected routes are predominantly descending, so that a defective film or a film with a failed transition can be dropped onto the floor in a convenient location. The expression "predominantly descending" in this description, implies more vertical (relative to gravity) than horizontal. Spindles are spindles in a fixed position. In this description, the spindles in a fixed position include spindles whose location does not change, such as in the planetary configuration, but which can rotate.

When a full roll is wound around the used spindle, the leading edge of the first packet of the next roll is guided along a different selected route to the other spindle. Thus, the winding device can immediately wind on another spindle without moving the spindles, and without having to remove the roll before winding the next roll.

In various embodiments, one or more of the following features are used that can be used individually or in many combinations. If necessary, air can be used to give the film the desired direction, and pop-up fingers and / or an air guide can be used to start a new roll. In order to hold the packets on the spindle, an electrostatic clamp can be used, and a bipolar electrostatic clamp can be used to hold the rear end of the last roll packet on the roll. In order to guide the film along the selected routes, conveyors can be used, and the conveyor can be deflected so as to adapt to the increasing roll diameter as the roll grows. A paper tape wrapping device can be used, and the drying time of the glue can be chosen so that the glue can dry while using another spindle. To remove the rolls, a collision device can be used that can clean the spindles substantially 360 ° around the entire spindle, since the spindles in this case are the spindles with the same position. "Essentially 360 °, in this description, includes a full circle, with the exception of some gaps.

The bag making machine shown in FIG. 1 is known in the art and belongs to the applicant of this invention. Known rotary bag making machine 100 continuously processes the film or web 201, using the node 203 with floating rollers, a pair of rollers 205 and 206 feed to the drum (elements 203-206 are part of the input section), a welding drum 208, a pair of rollers 210 and 211 of removal from the drum , the pressing blade 213, a pair of rollers 215 and 216 feed into the cutter, cutter 218 (this can be any device for processing the blade, for example, a puncher, cutter, punching knife, punching device, folding device), a pair of rollers 219 and 220 of removal from the cutter ( elements 210-220 co part of the output section) and the controller 221. The input section or the unwinding section, in this example, includes the part of the bag making machine, where the web, for example, the roll unwinding unit and the floating roller assembly, enters. The output section, in this example, includes nodes for processing the web after applying welds to it, for example, punchers, winders, folding devices, etc.

The canvas is fed to the drum 208 through the node 203 with floating rollers. On the drum 208 there is a group of welding bars 209. The welding bars are heated and create welds forming packages from the web 201. The web 201 is pressed against the drum 208 (and the welding bars) by a Teflon ^® coated pressure web. Packages made sequentially one after another are formed by one weld seam on the drum, and packages located during manufacture across the web are formed by two welds. The diameter of the drum can be changed and / or not all welding strips can be included to specify the distance between the welds, and hence the size of the package.

As a rule, in rotary machines, a circular knife located below, in the direction of movement of the film, is set so as to perforate between two welds, or behind the seam. In the known machine shown in FIG. 1, after the blade 201 comes off the drum 208, it is sent to the circular knife 218, which creates a perforation between the packets, or separates adjacent packets. When the fabricated bags are arranged one after another, the perforation is placed near a single weld in such a way that when the packages are separated, the perforation and the perforated end are the top of one package, and the weld is the bottom of the adjacent package.

The controller 221 is connected to various nodes to control speed, position, etc. Sensors that distinguish printing on the surface of the web when forming welds and / or combining perforation (applying perforation in the right place) with the weld can be used. In addition, sensors can detect welds for perforation in the right place.

Turning to FIG. 2, we consider a schematic representation of a winding device 200, in accordance with a preferred embodiment of the invention. The winding device 200 may be located downstream in the film supply path of the bag making machine 100 shown in FIG. Many of the alternatives mentioned above are presented, although, as already mentioned, the use of all of them is not necessary.

The film 201 extends from the punch or cutter 218 (FIG. 1) to the pick-up feeding unit formed between the rollers 303 and 305 (FIG. 2), of which at least one is a driven roller. The pickup feed unit retracts or feeds the film to the winder 200. (The pickup feed unit can relate to feed, input to the machine or section. In this case, it is used to feed the film to the winder section).

In a preferred embodiment, a vertical web feed is used through the gripper feed unit. Due to this, the machine can be made one-sided from the point of view of its maintenance by the operator and can be adapted for both left-sided and right-sided layout of the room.

The film 201, at the exit of the feed capture unit, is fed to the capture unit of increased speed formed between the rollers 307 and 309, at least one of which is driven. (Film 201, in various embodiments, after the feed capture unit, is supplied to other devices directly, or through intermediate elements). In a preferred embodiment, the high-speed gripping unit has a servo drive, and the percentage of excess can be easily changed by the user over a wide range of perforation intervals, for example, from 10 (254 mm) to 250 inches (6350 mm) without replacing structural elements.

In intermittent operation, a film connected by perforations is stretched and one of the many packets is separated from the packet following it, using increased speed only after a certain amount has been counted. In step-by-step mode, an overlap can be made with splitting and overlapping of each packet using a constant increase in speed. (Multiple packets in each roll are not divided). The high speed gripping unit can assist in leading the web to the appropriate selected feed path by not using the increased speed during the last roll packet of the lap-connected packets. When splitting packets, perforation detection is not required (but can be used).

The lap joint includes rods 311-315, mounted so as to move generally along an elliptical path 316 that crosses the film feed path 201 in two places (preferably, above and below the grip). In general, an elliptical trajectory 316 in this description does not imply a circular or angular route. The path shown in FIG. 2 is clockwise for winding a roll onto a spindle 337 located along one of the selected film supply paths. The rotor changes direction of rotation and moves the rods counterclockwise when using spindle 338 (located along another selected film feed path).

The rods pull the film to the side and can help in its separation, although one mechanism of increased speed can be used if the lap joint is not installed. The rods accumulate the film for some time to provide an overlap on the following packets. The overlap areas in the drawings are designated 317 and 318, and 319 and 320.

In the preferred embodiment, the rods are steel rods with a diameter of 0.5 inches (12.7 mm), on the one hand, attached to a chain or belt drive with a toothed belt comprising a drive sprocket and a tension sprocket, preferably with a servo drive. Thanks to this, the distance that the web should pass without having support is reduced. An air curtain or a series of air nozzles can be used to allow the film to pass through the gap formed by the rods of the mechanical lap joint system. Alternatives include using air to create an overlap joint, using more or fewer rods, using a different path, or other known lap joint devices.

In a preferred embodiment, the rollers 307 and 309 increased speed include grooves 0.25 inches wide (6.35 mm) extending in increments of one inch (25.4 mm) on the surface of both rollers, and creating gaps for several air nozzles 322- 325 in each groove. Air nozzles 322-325 are used to guide the film to the desired spindle. The upper air nozzles 322 and 323 are used to deflect the web to the opposite roller, and the lower air nozzles 324 and 325 are used to deflect the web down to the nearest belt conveyor 327 or 328 along the film feed path. As shown in FIG. 2, the air nozzles 322 and 325 are turned off and the nozzles 323 and 324 are turned on, directing the film 201 to the spindle 337. The nozzles 322 and 325 are turned on and the nozzles 323 and 324 are turned off when the film is directed to the spindle 338.

After the winding of the roll is completed, when the nozzles directed the trailing edge of the film of this roll to one spindle, the nozzles are reconfigured to direct the leading edge of the next roll of bags to the other spindle. Thus, the nozzles alternately direct the film along one of two routes. Change of routes, or alternation, occurs after a large number of packets are wound - a roll. If the separator operates in intermittent mode, then the nozzles alternate after separation. In step-by-step mode (overlap), the alternation is performed after the countdown of the set quantity.

In a preferred embodiment, the right and left spindles and related components are mirror images of each other, although this is not necessary. In this case, the spindle 338 rotates counterclockwise, and the spindle 337 rotates clockwise.

In a preferred embodiment, a web guided to spindles 337 and 338 is pressed against belt conveyors 327 and 328 by a series of closed elastic ropes. In addition, in one embodiment, the electrostatic clamp 330 and 331 is used to hold the film to the conveyors 327 and 328. The electrostatic hold 330 and 331 can be a bipolar electrostatic hold, which is designed not only to hold the film against the conveyor, but also to Encourage the rear end of the last roll packet to adhere to the roll by turning off the static converter for the last few rolls. Thus, the invention provides an electrostatic clamping of the rear end of the last packet in a roll to a roll to facilitate manual operations with the roll, while automating the operations of the roll and to reduce the need for gluing the rear end of the last packet.

In a preferred embodiment, the conveyor belts 327 and 328 are conveyors having one belt, or a series of narrower conveyor belts with an inch (25.4 mm) gap between them. The gap allows the use of pop-up fingers 340, 341 (one or more alternatively) by which the leading edge of the first packet can be guided into the air guide 342, 343 and around the winding spindle. The popping fingers 340 and 341 alternately direct the film closer to the spindle and retract after transferring the first packet. The gap between the conveyor belts also allows the use of hot-melt adhesive to fix the rear end with a reduced risk of glue entering the conveyor belt.

In a preferred embodiment, the conveyor belt 328 is mounted so that it can rotate at the end closest to the feed unit and capture remote from the spindle 338, which is in the same position, as shown by dashed lines and arrow 345, as the diameter of the film roll increases . The same swing is used for the conveyor belt 327.

Each winding portion may include a paper tape wrapping device 346, 347. Since one of the strapping devices can be used while the adjacent spindle is winding, two strapping devices, each of which rotates at a frequency of 20 cycles per minute, provide a rotation speed for the entire winding device of 40 cycles per minute. In addition, since there are two winding sections, each operating at a speed of 20 cycles per minute, pneumatic devices with a total speed of 40 cycles per minute can be used.

In the preferred embodiment, the spindles use the well-known Teflon ^® sleeve of CMD ^® design, either a shot-blasted design or a chrome construction. In addition, since the spindles are in an unchanged position, they can be used with simple collision devices that must not rotate, and can be cleaned substantially along the entire circumference of the spindle to remove film with less chance of adhesion. The constant position also helps to simplify the supply of air to the spindles.

Since there are two sections with a rotation speed of 20 cycles per minute (counts per minute), the machine speed is 40 cycles per minute, and there is more time to check the rolls, sort and reject, than in a single machine at a speed of 40 cycles per minute.

An alternative embodiment of the winding device 300 shown in FIG. 3 may include many of the features described above, including two winding sections. Various options can be used in combinations where the features of each of the options or known devices are selected in accordance with specific requirements.

The winding device 300 includes a gripping feed assembly formed between a pair of feed rollers 403 and 405, an increased speed gripping assembly formed between a pair of feed rollers 407 and 409 for separating adjacent bags, and spindles 437 and 438. In general, the operation of the winding device 300 is similar to that of winding device 200, except for the features described below.

The film or web 201 approaches the feed unit of the grip, winding or following along a portion of the surface of the roller 403, before entering the grip. The film extends along an arc equal to or greater than 10 °, 45 °, 60 ° or 90 °, in various embodiments.

Several fixed film guides 412 fastened to the support 410 are recessed in the roller 403. In a preferred embodiment, the surface of the guides 412 is flush with the surface of the roller 403 so that the web slides along the film guides, ropes (not shown) and the surface of the roller 403. The term "deepened in the roller "in this description means the placement partially or completely in the recesses on the roller. The recesses can be grooves or channels, and in a preferred alternative embodiment, have a depth such that the web rests simultaneously on the guiding films and on the surface of the roller 403. In the preferred embodiment, the guides are made of metal with a slippery surface and enter the recesses in the roller 403 with a small gap at the edges of no more than 0.010 inches (0.25 mm). Due to this, the film lies flat, without falling into the gaps between the recesses and the guides 412.

5 shows an embodiment of a roller 403 with recesses 501 for film guides 412 and rope recesses 502. In this embodiment, nine guides and two ropes are provided. In addition, there are openings 505 for venting (countersunk, 1/2 inch (12.7 mm) in diameter and 1/8 inch (3.18 mm) deep) to improve the fit of the film close to the surface of the roller 403 (and on the rails 412 films not shown in FIG. 5). On the opposite side of the roller 403 (180 ° from the holes 501) there are corresponding holes.

The film follows the surface of the roller when it mainly lies on the outer surface, and the film is not required to fit snugly into the recesses, etc. The film guide, in this description, includes a structure used to support and guide the film, and should not stretch film. The surface of the roller, in this description, is the surface of the roller located essentially at the same distance from the axis of the roller.

The film guides 412 may have the same extent with the arc of the roller 403 along which the film passes before grabbing, or they may have a greater or lesser extent. In a preferred embodiment, the film guides 412 and the arc are long enough to support or touch the film 201 as it approaches the pickup feed assembly. It has been found that stationary guide films extending laterally along the direction of approach to the grab so that the film 201 extends above the guides 412, ropes (not shown) and roller 403 provide faster and more stable operation.

The film guides 412 pass through the pickup feed unit but are recessed directly below the surface (e.g. 1/16 inch (1.6 mm)) of the roller 403 closest to the pickup film feed path to allow the pickup pickup unit to function as desired pinch film 201. In this description, the surface of the roller closest to the film feed path is the surface of the roller, along which the film generally follows. “Below the surface of the roller,” as used herein, means “closer to the axis of the roller than the surface of the roller in contact with the film.”

Several film guides 460 mounted to the support 464 are connected to the film guides 412. The film guides 412 and 460 can be considered continuous film guides. Several film guides 462 are mounted on a support 466, and guide the film 201 on the back of the film 201. In a preferred embodiment, the film guides 460 and 462 are spaced enough so that the film can easily pass between them, for example, 1/16 inch (1 , 6 mm). The rails 460 and 462 are recessed in the rollers 403, 405, 407 and 409, and the feed gripping unit and the increased speed gripping unit are recessed below the surface so as not to interfere with the gripping operation (for example, 1/32 inch (0.8 mm) each ) The rails 412, 460 462 may be one or more separate rails.

Ropes covering rollers 403 and 407 (and, in one embodiment, rollers 405 and 409) are also used to move the film. The use of ropes is especially effective for drawing thin films, for example, high density polyethylene films with a thickness of 6 μm, but is not used in some cases, for example, for heavier films.

In a preferred embodiment, the ropes are used closer to the middle of the film, and the guides are closer to the edges to improve support. For example, for a six-inch (152.4 mm) web a device is used with three film guides 412 (two of which lie near the edges of the film 201, and one in the middle), and two ropes, each of which is located between the film guides. For wider films, a greater number of film guides are used (and / or more ropes can be used if necessary).

The winding device 300 may operate in continuous mode, or in a lap joint mode. In the overlap mode, the film 201 is divided into adjacent packages by means of rollers 407 and 409 having an increased speed. The rollers 407 and 409 can periodically approach each other, or periodically accelerate to separate the film 201 into packets (other methods of separating adjacent packets can also be used). Figure 3 shows the package 201a, which was separated from the film 201. In continuous mode, the rollers 407 and 409 can move at the speed of the film, remain diluted, or be driven rollers.

Guides 460 and 462 extend beyond the grip, where the bags are separated, in order to help the film skip the gap between the rollers 407 and 409.

To connect the overlap packets, it is necessary that the film lower in the feed direction moves more slowly, and that excess film is stretched when overlapping. The embodiment shown above (FIG. 2) shows one way of separating the film and pulling the film to overlap it. Figure 3 shows another method of tensioning the film for its overlap. The rollers 411 and 413, which are lower in the direction of the film feed, move the film more slowly in the overlap mode than the rollers 403 and 405 (in the non-overlap mode, they move at the same speed as the rollers 403 and 405).

Air sources or air nozzles / tubes 404a and 406a (mounted on supports 404 and 406) deflect the film from the feed path in order to pull off excess film when overlapping. As shown in FIG. 3, the nozzle 404a is activated and deflects the film from the supply path to the left, thereby pulling the excess film. In the present description, the deviation from the film supply route refers to the accumulation of the bag or film when the bag or film moves along a path that does not coincide with the film supply route. Nozzles 404a direct air at least partially in the transverse direction, i.e., on the right side of the film in FIG. 3. Nozzle 406a also directs air at least partially in the transverse direction, but on the opposite, left, side of the film. Nozzles 404a and 406a can be made with multiple nozzles, with one nozzle and / or in the form of an air duct.

Next, the package 201 a moves to the feed of the capture unit between the rollers 411 and 413, moving at a reduced speed, causing an overlap. In a preferred embodiment, the speed reduction is 20%. Around the rollers 411 and 413, there are ropes 411a and 413a that help stretch and guide the film to one or more conveyors 427/428, which are further downstream.

In one embodiment, a single winding portion is used. In the alternative, preferred embodiment shown in FIG. 3, two winding sections are used having a spindle 437/438, a conveyor 427/428 covering the roller 468.

After the rollers 411 and 413, the bag 201a can be directed to the desired winding area by means of a rotating brush 416. In a preferred embodiment, the brush 416 is made in full width and is located so as to touch the ropes 411a / 413a and / or conveyor belts 427/428, the point where the film supply path can follow either the first selected film supply path to the spindle 437, or the selected film supply route to the spindle 438. FIG. 3 shows packets 201a and 201b overlapped following the winding portion, with the brush 416 rotates clockwise ke. In a preferred embodiment, the rolls are alternately wound on spindles 437 and 438.

After the bags 201a and 201b are brushed in the desired manner, directed past the additional pin clamp 422, the additional hot-melt adhesive dispenser 424, and the additional strapping device 426 (i.e., the knot or tape dispenser around the roll of wound bags). A pair of 442/433 air guide devices is used to facilitate the start of coil winding. A pair of trays 450/451 sorting device direct the wound rolls of the hopper or to the floor, depending on whether they are skipped or rejected. Near the spindles 437/438 is a pair of rods / pullers 440 and 441 to remove defective packages and / or defective rolls.

One embodiment of strapping device 426 is shown in FIG. 4 and includes a conveyor 610 covering a roller 612, an air source 616, and an air source 608 mounted on an air guide device 433 that interacts with a conveyor 428 to wind the belt 601 around a spindle 438 wound around (FIG. 3) a roll of 618 packets. The strapping device 426 is shown for the left strapping device of FIG. 3, and the right-side strapping device will be its mirror image.

When belt 601 pulled by conveyor 610 approaches roll 618, belt 601 extends above the top of roll 618. Nozzles 608 direct air onto belt 601 to help maintain the belt (ie, prevent it from falling before it reaches roll 618) . Safety devices 615 prevent winding of belt 601 onto conveyor 610 and roller 612.

After the belt 601 has reached roll 618, nozzles 616 direct air to deflect the belt down around the right side of roll 618, thereby helping to wrap belt 601 around roll 618. When belt 601 is wrapped around roll 618, it is supported by air flow from nozzles 608 from the bottom of the roll 618, which contributes to its wrapping around the roll 618.

Each of the nozzles 608 and 616 may be single nozzles, ducts, or have multiple nozzles. In addition, nozzles 608 can be mounted on any support, and need not be located on an air guide 433. Nozzles 616 can also be mounted on any support.

In the present invention can be made numerous modifications that fall within the scope of its claims. At the same time, it should be obvious that the method and apparatus for manufacturing and winding packages presented in accordance with the present invention fully satisfy the stated objectives and claimed advantages. Despite the fact that the invention has been described using specific embodiments thereof, it is understood that various alternatives, modifications, and changes will be apparent to those skilled in the art. Accordingly, it is intended that the invention covers all such alternatives, modifications, and changes that fall within the spirit and scope of the appended claims. Considering in detail at least one embodiment of the invention, it should be borne in mind that the implementation of the invention is not limited to structural details and the location of the components presented in the above description or in the drawings. The invention may have other embodiments, or may be used or carried out in various ways. In addition, you must understand that the expressions and terms used here correspond to the tasks of description and cannot be considered restrictive. Identical designations are used for the same components.

Claims (25)

1. A winding device for a bag making machine or sheet cutting machine, comprising a picking feed unit formed between the first and second feed rollers, a winding section, at least a first film guide located along the film supply path, at least along an arc to the feed unit capture, and a first spindle located along the film supply path containing the film feed path of the first spindle, in which the film approaches the first feed roller, follows the surface of the first feed roller the face along the arc of at least 10 ° to the feed pickup unit, then goes to at least one winding section and along the film feed route downstream of the feed direction from the pickup pickup unit, at least one film guide is recessed in the first feed roller, at least in an arc. 2. The device according to claim 1, in which at least the first film guide is fixed and recessed in the first feed roller, at least in an arc with the possibility of touching at least the first guide film and the first feed roller. 3. The device according to claim 2, in which at least the first film guide is provided with a surface and is recessed in the first feed roller on the feed pickup unit with the possibility of arranging the surface of at least the first film guide closest to the film supply path below the surface of the first feed roller closest to the film feed path, 4. The device according to claim 3, in which the arc is at least 60 °. 5. The device according to claim 3, in which the arc is at least 90 °. 6. The device according to claim 3, which further includes a second spindle and a film supply path of the second spindle, wherein the film supply path of the first spindle is the first selected film supply path, after which the film after exiting the pick-up feeding unit follows the capture of the first selected route film feed to the first spindle and wound on it, and the film supply path of the second spindle is the second selected film supply route, while the second spindle is located on the second selected mark rue film feeding, by which the film after exiting the delivery unit must capture to capture the second film feed the selected route to the second spindle and is wound onto it. 7. The device according to claim 6, which further includes a rotating brush located in the place where the film feed route follows the first selected route when the brush rotates clockwise or along the second selected film feed route when the brush rotates counterclockwise. 8. The device according to claim 7, which further includes a capture unit of increased speed formed between two rollers with increased speed located along the film supply path lower in the feed direction from the feed capture unit and higher in the feed direction from the first and second selected film supply routes , in which the film follows from the feed capture unit to the capture unit of increased speed to the rotating brush and along the first or second selected route of supply of the film. 9. The device of claim 8, which further includes a first air source directed at least partially in the first transverse direction to the film supply path and the first side of the film, by which part of the film deviates from the film supply path and pulls excess film to connect overlapping adjacent packets. 10. The device according to claim 9, which further includes a second air source directed at least partially in the second transverse direction to the film supply path and the second side of the film, by which the second part of the film deviates from the film supply path and pulls the excess film for lapped adjacent packets. 11. The device according to claim 10, in which the first and second air sources are located higher in the supply direction from the rotating brush and lower in the supply direction from the capture unit of increased speed. 12. The device according to claim 6, which further includes at least a first rod located in the area of the first spindle for removing defective packages, and at least a second rod located in the area of the second spindle for removing defective packages. 13. The device according to claim 6, in which at least the first film guide consists of at least three film guides. 14. The device according to claim 7, which further includes at least a second film guide located along the film supply path from a place higher in the feed direction from the feed capture unit to a place in the area of the capture unit of increased speed and from the opposite side of the film from at least the first guide film. 15. A method of winding bags of continuous film, including the direction of the film through the first feed roller and at least the first guide film, recessed in the first feed roller, along the surface of the first feed roller in an arc of at least 10 °, the film direction by of at least the first film guide and the first feed roller to the pickup feed assembly formed between the first and second feed rollers, and the film is directed to at least the first winding portion and the packages are wound on the first section of the winding. 16. The method according to clause 15, in which when the film is directed by the first feed roller and at least one guide film, the film is brought into contact with at least one guide film and the first feed roller, at least in an arc . 17. The method according to clause 16, in which when directing the film through the first feed roller and at least the first guide film, direct it along the surface of the first feed roller, at least in an arc of 60 °. 18. The method according to clause 16, in which when the film is directed by the first feed roller and at least the first film guide, it is directed along the surface of the first feed roller, at least in an arc of 90 °. 19. The method according to clause 16, which further includes directing the film to the second winding portion and winding the packets in the second winding portion, the film being directed to the first winding portion before winding the first packet roll and directed to the second winding portion prior to winding the second packet roll. 20. The method according to claim 19, which further includes rotating the brush clockwise, by means of which the film is directed to the first winding section, and rotating the brush counterclockwise, by which the film is directed to the second winding section. 21. The method according to claim 20, in which the film is a sequence of packages formed by welds and perforations, which are separated from adjacent packages by feeding the film to the capture unit increased speed. 22. The method according to item 21, which further includes the direction of air flow to the film in the first transverse direction to the first side of the film, through which part of the film is deflected from the film supply path, stretch the excess film and overlap adjacent packages. 23. The method according to item 22, which further includes the direction of air flow to the film in the second transverse direction to the second side of the film, opposite the first transverse direction, through which the part of the film is deflected from the film supply path, stretch the excess film and overlap adjacent packages. 24. The method according to clause 15, which further includes moving the rods to remove defective packages. 25. The method according to 17, in which when directing the film by means of at least the first guide film and the first feed roller, the film is directed between the at least second guide film and at least the first guide film to the pickup feed unit .

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