WO2011127613A1

WO2011127613A1 - Arrangement for forming a band loop and process and apparatus for producing tear-open lids

Info

Publication number: WO2011127613A1
Application number: PCT/CH2011/000071
Authority: WO
Inventors: Nandor Koeteles
Original assignee: Soudronic Ag
Priority date: 2010-04-13
Filing date: 2011-04-04
Publication date: 2011-10-20
Also published as: CN102958625A; TW201206771A; PT2558231E; CN102958625B; US20130028685A1; EP2558231B1; ES2539718T3; EP2558231A1; CH702938A1; TWI531510B

Abstract

When handling a foil band (6) which is to be uncoiled from a delivery spool (2) and is drawn in gradually by a drawing-in device (4), a foil band loop (7) is produced. In order that this can take place without any errors with high production cadences, provision is made of an arrangement (1) in which a hollow cylinder (10) rests loosely on the band with a limited freedom of movement so as to form the band loop. Such an arrangement is preferably provided for the production of tear-open lids, in which a foil band is uncoiled from a band delivery spool and fed to a stamping and sealing station.

Description

Arrangement for forming a band loop and method and apparatus for the production of tear-open lids Reference to related applications

This application claims the benefit of Swiss Patent Application No. 0531/10, filed on Apr. 13, 2010, the entire disclosure of which is hereby incorporated by reference.

Field of the invention

The invention relates to an arrangement for forming a belt loop between an unwinding

drivable tape supply roll and a tape feed device. In particular, the arrangement is at a

A method of manufacturing tear-open covers, comprising forming a plurality of parallel rows of metal lid rings, one stepwise

Promotion of the lid parts to several

Processing stations and a gradual feeding a film strip from a tape supply roll to the cover rings and the punching of film sections and the application and heat sealing of the film sections on the cover rings in a punching and sealing processing station takes place, wherein in the film strip by means of the arrangement, a film strap loop is formed, which between the Foil strip roll and the collection of the film strip in the punching and sealing ^{processing ¬} station comes to ^rest . Furthermore, the invention relates to a device for the production of tear-open lids with an arrangement according to the invention.

background

It is known lid for cans or cans like packaging on the top of the package to carry out permanently attached metal lid, which form a removal opening, which is closed until the first use of the packaging contents with a tear-off, applied by Heisssiegelung, in particular Metallfo- lie. An additional, arranged over the metal lid plastic lid makes the packaging during the period of use for their contents closed again. Devices for producing such metal covers are explained in more detail below with reference to FIG. FIGS. 6 to 12 serve to explain manufacturing steps in the production of such covers. The tear-off film is withdrawn during manufacture as a broad film web from a tape supply roll and introduced into the punching and sealing stations or guided over the lid parts. To provide a

Tape supply for the collection of the film strip in the punching and heat sealing processing station are used single or multiple so-called dancer roller systems, however, which can result in high production cadences problems in the stepwise film transport, especially in thin film strips. Belt loops of conventional type are generated by the control of the drive of the unwinding tape supply roll and regulated, for example, by means of a distance sensor which measures the distance of the loop from the stationary sensor. For widely varying feed lengths at high belt speed, this is drivingly consuming or gives insufficient results of it ^¬. In DE-A 40 02 194 the formation of a belt loop by means of an air flow is proposed.

Presentation of the invention

The invention is based on the object to provide an arrangement with which a belt loop can be provided in a simple manner, which even with high production cadences with stepwise belt transport and working safely on a wide variety of film materials.

This object is achieved with an arrangement according to claim 1.

It has been shown that by the in

Limits freely movable hollow cylinder, which thus temporarily rests loosely on the tape and the lower

Deflection of the strap loop forms a stable

Belt loop also under the conditions mentioned

is achievable. In this way are also plastic films or laminate films or aluminum foils with

Belt speeds of 60 meters / min. and stroke from 50 to 150 millimeters per stroke very easy to handle, which allows the use of the arrangement in the production of high-speed tear-open lids.

Preferably passes through the hollow cylinder a horizontally disposed, held on both sides in the side walls crossbar, which limits the free movement of the hollow cylinder. This results in a particularly simple travel restriction for the hollow cylinder. Further, it is preferred that the crossbar is arranged vertically displaceable in each vertical slot guide in the side walls to the freedom of movement of the

Restrict hollow cylinder in the vertical direction. The diameter and also the material of the hollow cylinder can be chosen differently. Thus, the diameter can be e.g. 20 cm or larger. As a material in particular plastic comes into question.

The invention is further based on the object to provide a method and an apparatus for the production of tear-open, in which the advantageous arrangement for obtaining the belt loop is used. This is achieved by the method according to claim 9 or the device according to claim 12.

In this case, the film strip is preferably viewed horizontally and in plan view with its longitudinal direction substantially perpendicular to the conveying direction of the cover parts fed into the punching and sealing processing station with partly uneven step lengths.

With the rectangular feed of the film web, it is possible to achieve a film savings of approximately 20% compared to the conventional skew feed. Straight

However, feeding results in more than two parallel rows of lids a widely varying step length of the foil strip feed. The stabilization of the film belt loop by means of the arrangement makes it possible to handle the film or large

Step length fluctuations even at high

Feeding speeds.

Brief description of the drawings In the following, embodiments of the

Invention and the preparation of tear-open with reference to the drawings. It shows

Figure 1 is a schematic side view of an embodiment of an arrangement according to the invention in use between a tape supply roll and a tape feed;

FIG. 2 shows the arrangement of FIG. 1 with the hollow cylinder lifted off the belt;

Figure 3 shows the arrangement according to Figure 1 in perspective view;

Figure 4 is a side view of the arrangement with another position of the hollow cylinder;

Figure 5 is a schematic side view of a known device for the promotion and production of tear-open; and

Figure 6 to Figure 12 sectors of metal lids for explaining the lid manufacturing.

Way (s) for carrying out the invention

Figures 1 to 4 show an embodiment of an inventive arrangement 1. This is provided and configured to form a belt loop 7 in a band 6. The belt 6 is driven by egg ^¬ ner tape supply roll 2 unwound and then passes into the assembly 1. After this, the tape is conveyed by a feed device 4, which belongs to a device in which the tape is used or processed. An example of such a device will be explained below. For the illustrated belt conveyor, the belt running direction D. The processing of the tape results in the supply roll is generally carried out with uniform Ge ^¬ speed or can be adjusted via the drive 19, only relatively slowly to rapid changes in speed of the drafting device. 4 In particular, the drawing-in device 4 can bring about a gradual introduction of the strip with changing catchment lengths. The arrangement 1 has the purpose over the .Bandschlaufe 7 to compensate for the feed fluctuations in speed and / or Einzugsschrittlänge by the loop forms an easily retractable strip material supply. This is known in principle.

There is provided an unillustrated drive 19, e.g. is formed by an electric motor. The person skilled in such drives are known, so that no further information must be made here. The drive 19 can by controlling the

Device with the intake device 4 done to adjust the tape processing to the tape needs. It can also be a sensor 19 ', in particular in the form of a

Distance sensor, be provided, whereby the drive 19 can respond to the increase in length or length decrease of the loop. The sensor signals can be delivered to the controller of the device and processed there for the control of the drive 19 or they can be delivered to a directly associated with the drive control to supplement the control signals from the device. The arrangement 1 has two side walls 8 and 9, which consist for example of plastic or metal. Between these side walls, the band runs and forms there the loop 7. It is a hollow cylinder 10 is provided, which lies on the band and the deflection of the same forms and thus supports the loop formation and thus determines the settlement reserve. The diameter of the hollow cylinder can be chosen differently. The hollow cylinder may for example consist of plastic, in particular of polymethyl methacrylate (abbreviated PMMA, colloquially acrylic glass). It is also possible to choose a material with a higher specific weight in order to achieve greater prestress, for example aluminum. The hollow cylinder preferably has the illustrated circular cross section, but could also have an oval or polygonal cross section. The hollow cylinder is guided substantially flush with its end faces between the side walls, so that it can move freely between the side walls without tilting relative to the side walls. The hollow cylinder is free to a limited extent in its movement, so that it can move freely in the direction of tape travel and perpendicular thereto by a predetermined amount. This amount depends on the diameter and depends on the processing. The restriction of movement can be limited by any means acting on the hollow cylinder. Preferably, this is acted upon from the inside to the hollow cylinder and in particular by a cross bar 11, which is arranged horizontally between the side walls and extends through the hollow cylinder therethrough. The crossbar 11 may be arranged fixed in the side walls or preferably guided vertically displaceable therein. For this purpose, the illustrated vertical slot guides 12, 12 'may be provided.

In Figures 1 and 3, the hollow cylinder 10 is shown in its vertical lowermost position. He lies with his inner wall on the crossbar 11, which in turn is located at the very bottom of the slot guides. Now withdraws the collection device 4 more tape off, is handled as driven by the supply roll, so the belt loop shortens, causing the hollow cylinder is deflected from the illustrated bottom layer. He is free in his movement between the side walls. It has been shown that by such a freely movable hollow cylinder, which thus within the free mobility only with its weight (which is adaptable by diameter selection and / or choice of material of the hollow cylinder) rests on the tape and forms the deflection and causes the bias of the tape , even very thin and light foil bands are very good as a loop handle. The free mobility of the hollow cylinder through the band is meanwhile limited, in the example shown by the crossbar 11. If the path length of the free mobility is used up (which results here by the inner diameter of the hollow cylinder), so contacts in this training, leadership example of the hollow cylinder first the crossbar 11, so that its free mobility is used up and is also reduced laterally. This position is shown in FIG. If more ribbon is drawn in than unwound, the hollow cylinder pulls the cross bar upwards. This is clearly visible in FIG. Here, a position is shown in which more tape has been drawn by the retractor 4 for a certain time, as has been supplied by the tape supply roll, so that the loop 7 has shortened so far that the hollow cylinder 10 has been pushed up and while the crossbar 11 in their slot guides 12, 12 'has also moved upwards. The upper end of the slot guides 12, 12 'would also limit this upward movement. If the feeder device subsequently pulls in less strip than is supplied by the supply roll, or if the drive of the supply roll is adjusted or controlled in such a way that more strip is unwound per unit of time, the loop 7 extends again and the hollow cylinder lying on the strip lengthens moves back down, maximum in the Position of Figures 1 and 2. A further extension of the loop should be prevented by the control of the drive of the supply roll 2, since the belt or the loop 7 should not run without the stabilizing effect of the hollow cylinder through the assembly 1.

In the embodiments shown, the

Arrangement an upper inlet side band deflection 14 and an upper outlet side band deflection 15. The band deflections are arranged at the top of the side walls. The deflections may be rollers that rotate with the tape. But it can also be provided non-rotating deflections. Preferably, adjustable lateral boundaries are provided for the band so that it runs in a defined position over the band deflections 14, 15. In the embodiment shown are on the respective deflection 14 and 15 axially displaceable and fixable starting discs 14 'and 14' 'on the

Band deflection 14 and 15 'and 15' 'provided on the band deflection 15. These slices are after loosening their attachment in their distance to the width of the

Adjusted band and then fixed again so that they form lateral boundaries for the band.

As an alternative to the tape guide shown on the inlet-side deflection 14 of the arrangement 1, the tape on the inlet side via a deflection 16 (Figure 3) are guided so that the tape from the supply roll 2 under the guide roller 16 and the hollow cylinder 10 extends. The arrangement 1 is preferably fastened by adjustable fastening means 17, 18 to the carriers 5 and 3 for the supply roll 2. The

Adjustability makes it possible to adjust the spacing of the arrangement 1 in the horizontal direction from the carriers 5, 3. The preferred use of the arrangement in the production of tear-open lids will now be explained. In this case, the tape present on the supply roll 2 is the tear-open film material from which the tear-open film is punched out for each cover. With reference to the figures 5 to 12 briefly processing equipment and manufacturing steps for the production of metal lids are described with tear-off according to the prior art. FIG. 5 shows a schematic side view of a known device 21, which has a plurality of processing stations 23 to 28 and a further station 29 on a machine frame 22. A conveyor for the cover parts is according to a preferred embodiment a linear conveyor, as it is known from WO2006 / 042426. This linear conveyor is designed to promote ceiling-shaped objects of the type described below by means of toothed belt and is suitable for a very rapid promotion and lid production. On the opposite and synchronously moved toothed belt, opposing receptacles for the cover parts are provided. The conveyor device is used for cyclically conveying the lid parts or covers to the individual processing stations, as will be explained below. The Fördervor- direction shown in Figure 5 promotes the cover parts or the cover finished with tear-off in the conveying direction, which is indicated by the arrow C, from the beginning of Einrich- ^'tung in stack 31 to the end of the device where the lid over Slide into the shelves 36 or 37 arrive. From the stack 31 lid parts are stacked in a known manner and get into the conveyor. The conveyor shown has a different construction than the preferred linear conveyor according to

WO2006 / 042426 and will be explained only briefly here. There are two each individually provided laterally of the cover parts or cover arranged long rails, wel ^¬ che the shelves or in the stations 23 to 29 lying lid parts or covers when lifting the rods by means of the drive in the direction A lifting up and then move forward in the direction of the

Arrow B (rectified as the arrow C) by the crank drive by an amount forward. After that the rods are moved in the direction of the arrow A downwards with the lid parts or lids are in turn stored on their filing points. The rods are then moved below the storage positions in the direction of arrow B against the arrow C backwards to then perform the process described again. The cover parts or cover rest between the transport on their storage positions or are located in the processing stations and are processed there. After a processing step of all processing stations, the re-promotion takes place. FIG. 6 shows stacked metal lid blanks 120 as an example of lid parts as they are present in the stack 31. These blanks 120 are eg round metal discs of eg 11 cm diameter. Of course, other basic shapes, eg square or rectangular discs and other diameters are readily possible. The blanks 120 are already preformed in a processing machine, not shown, at its edge as shown in FIG. In the figure 6 and the following figures, only one sector of the entire disc is shown in each case in order to simplify the drawings. In the first processing station 23 of Figure 5 is punched by a punching with top and bottom die an opening 129 in the disc, which can be seen in Figure 7, in which the edge of the opening is denoted by 121 and the punched round disc 127th This disc is discharged as waste. The punching processing station 23 is - as is the case with the other stations - driven by a drive 115. At the processing station 24, the edge 121 is pulled down, whereby the course 122 of the edge shown in FIG. 8 is achieved. The annular blank blanks 120 now pass into the stamping and processing station 25, in which the tear film 125 is placed over the opening of the lid 120 and fixed there by heat sealing, which can be seen in FIGS. 9 and 10. The tear-open film 125 is preferably a laminate foil or is an aluminum foil and is provided in a known manner on its underside with a plastic layer. The required foil blank 125 is punched in the station 25 from a wide film web and placed over the central recess of the annular disc and the film is pressed by heat sealing at the edge of the circular recess of the part 120 under heat, so that the film 125 with the metal lid 120 is sealed by melting and subsequent cooling of the plastic layer. This is known and will not be explained here. It can also be provided that the tear-open film in the stamping and processing station 25 is only pre-sealed and subsequently sealed in a further heat-sealing station. to

Cooling can be provided if necessary, a cooling processing station 27. In a processing station 28, the film 125 can be provided with an embossment 124 (FIG. 11), and the edge 122 is further crimped to the finished edge 123. In a test station 29, the now finished lids are subjected to a test, which as a rule encompasses the sealing test, which is explained in more detail below, for the release liner 25 applied to the cover. If the film is tightly fastened on the remaining metal dekel, the lid arrives in the receptacle for the finished lid. If a leak is detected, the lid passes over the other slide shown in the waste container.

With the aforementioned linear conveying device, the lid parts or lids with high number of cycles of e.g. 200 objects per minute and be promoted with reproducible steps between stations. There is also a flexible concept for a large format range of the objects or dekelkel, which in round lids, for example. can range from a diameter of 50 to 200 mm and also various

Rectangular formats eg for common fish cans can. The conveyor is also designed as a compact module especially for multi-lane construction. In combination with such a production of high cadence lids, the arrangement for forming the belt loop can be used particularly advantageously. However, it can also be used in other devices in which a belt loop must be created.

In the handling of a unwinding from a supply roll film strip, which

is gradually fed into a feeder, a film loop is produced. This can be done without interference at high manufacturing cadences, an arrangement is provided in which a

Hollow cylinder loosely with limited freedom of movement to form the belt loop rests on the tape. Such an arrangement is preferably provided in the manufacture of tear-open lids, in which a foil strip is unwound from a supply roll and fed to a punching and sealing station.

Claims

claims

1. Arrangement (1), which for forming a belt loop (7) between a unwound driven tape supply roll (2) and a driven

Feeding device (4) for a step-by-step insertion of a band (6) is provided and configured, characterized in that the arrangement comprises two side walls (8, 9), between which the band extends, and a

Hollow cylinder (10) which is guided at each end by one of the side walls of the arrangement and freely movable between the side walls in a predetermined amount, wherein the hollow cylinder is intended to come to rest during operation of the arrangement on the belt (6) and the Redirect ribbon to loop (7).

2. Arrangement according to claim 1, characterized in that through the hollow cylinder a horizontally extending, held on both sides in the side walls crossbar (11) which limits the free mobility of the hollow cylinder.

3. Arrangement according to claim 2, characterized in that the transverse rod (11) in each case a vertical slot guide (12, 12 ') in the side walls (8, 9) is arranged vertically displaceable. , Arrangement according to one of claims 1 to 3, characterized in that above the side walls, an inlet side and an outlet side band deflection (14, 15) is provided.

5. Arrangement according to one of claims 1 to 3, characterized in that upstream of the side walls a band deflection (16) and the outlet side above the side walls, a band deflection (15) is provided.

6. Arrangement according to one of claims 4 or

5, characterized in that at the band deflections on the width of the band adjustable lateral boundaries (14 ', 14' ', 15', 15 '') are provided for the band.

7. Arrangement according to one of claims 1 to

6, characterized in that these fastening means (17, 18) for attachment to the carrier (3, 5) of the

Tape supply roll, by which the distance of the arrangement (1) to the supply roll (2) in

Belt conveying direction is adjustable. 8. Arrangement according to one of claims 1 to

7, characterized in that it comprises a non-contact sensor (19 ') for determining the position of the belt loop, in particular a distance sensor for determining the vertical distance of the belt loop from the sensor.

A method of making tear-open lids using an assembly according to any one of claims 1 to 8, comprising the steps

- Forming of a series or more parallel rows of cover rings made of metal, wherein a stepwise linear promotion of the cover parts to

several processing stations,

Γ

- Gradual feeding a film strip from a tape supply roll to the cover rings and punching out of film sections and applying and

Heisssiegeln the film sections on the cover rings in a punching and sealing processing station, wherein in the film strip by the arrangement of a belt loop is formed, which comes to rest between the tape supply roll and the collection of the film strip in the punching and sealing processing station.

10. The method according to claim 9, characterized ge ^¬ indicates that

- The foil strip horizontally and seen in plan view with its longitudinal direction substantially

vertical to the conveying direction of the lid parts in the punching and sealing processing station is supplied with partially uneven step lengths.

11. The method according to claim 9 or 10, characterized in that the stepwise linear

Promotion of the lid parts is carried on a conveyor with lid part recordings formed by toothed belts and drivers. 12. A device for the production of tear-open lids with a. Arrangement according to one of claims 1 to 8, comprising a conveyor, which is provided for the stepwise, linear promotion of cover parts to a plurality of successive processing stations, including a punching and sealing processing station is provided which for punching foil sections and for applying and heat sealing the Film sections on the lid rings is designed, and a film strip feed, which is provided for gradually feeding a film strip from a supply roll to the punching and sealing processing station, the arrangement being able to produce a film strip loop which is inserted between the supply roll and the film web Punching and Heisssiegel- processing station comes to rest.

13. The apparatus according to claim 12, characterized in that the film strip feed is arranged such that the film strip seen horizontally and in plan looks with its longitudinal direction substantially perpendicular to the conveying direction of the lid parts in the punching and sealing processing station can be fed.

14. The apparatus of claim 12 or 13, characterized in that for the stepwise linear promotion of the lid parts a conveyor is provided with formed by toothed belt and drivers cover part recordings.