EP1935791B1 - Maschine und Verfahren zum Aufschrumpfen von Schrumpffolie auf Packgut - Google Patents

Maschine und Verfahren zum Aufschrumpfen von Schrumpffolie auf Packgut Download PDF

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Publication number
EP1935791B1
EP1935791B1 EP07021763A EP07021763A EP1935791B1 EP 1935791 B1 EP1935791 B1 EP 1935791B1 EP 07021763 A EP07021763 A EP 07021763A EP 07021763 A EP07021763 A EP 07021763A EP 1935791 B1 EP1935791 B1 EP 1935791B1
Authority
EP
European Patent Office
Prior art keywords
hood
packaged goods
shrink
conveyor belt
type shrink
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07021763A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1935791A1 (de
Inventor
Stefan Elsperger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Krones AG
Original Assignee
Krones AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Krones AG filed Critical Krones AG
Publication of EP1935791A1 publication Critical patent/EP1935791A1/de
Application granted granted Critical
Publication of EP1935791B1 publication Critical patent/EP1935791B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat
    • B65B53/06—Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
    • B65B53/066—Mobile frames, hoods, posts or the like

Definitions

  • the invention relates to a machine for shrinking shrink film on packaged goods according to the preamble of claim 1, and to a corresponding method.
  • Such machines are for example from the EP 1 288 129 known. It describes a shrink tunnel in which packaged goods, such as containers with bottles, cans or the like, are guided on a conveyor belt through a tunnel. In the tunnel, hot air blowers ensure that the shrink film enveloping the packaged goods is heated and shrinks onto the pack.
  • these known shrink tunnel have the disadvantage that they are relatively long and relatively high due to the movement of the packaged goods in the tunnel, as well as the design of the tunnel for packaged goods of various sizes. Consequently, the tunnel volume is relatively large. Therefore, much of the energy produced by the heat guns is lost by having to heat the entire tunnel and having relatively large infeed and outfeed openings.
  • hood shrinkers which put the packaged goods on the conveyor, in particular put it over individually, and then along a part of the length in the conveying direction with the packaged together, the volume to be heated is reduced, and thus reduces the heat energy losses. This effect can be further improved if, depending on the packaged goods, appropriately adapted hood headers are used.
  • the machine has an additional heating means, in particular a hot air blower, under the conveyor.
  • a hot air blower under the conveyor.
  • the hood shrinker comprises an upwardly closed hood. This ensures that over the entire section, during which the hood shrink is placed over the packaged goods, heat losses are prevented upwards.
  • the hood shrinker completely overwhelm the packaged.
  • a uniform heating of the shrink film allows, resulting in a controlled shrinkage of the film.
  • printed shrink films can thus be achieved optically good results.
  • the hood shrinker in the side wall of the hood can have nozzles for blowing warm air.
  • the container wrapped with the shrink film with no film on two sides first.
  • the uncovered pages are also called foil eyes. If hot air is blown in this area intensively, the laterally protruding film contracts very strongly here and partially covers these sides of the container as well.
  • the nozzles in the side wall allow a targeted blowing hot air into the film eye, in particular There is no wind, as in the known shrink tunnels, which leads to an inaccurate shrinkage result.
  • the machine may comprise a conveyor belt, which is designed so that it moves with the speed of the conveyor and on the hood of the shrinker can be coupled.
  • a conveyor belt By providing the conveyor belt, the synchronous co-movement of the hood shrinker with the conveyor belt is ensured in a simple manner. Due to the additional possibility of coupling the hood shrink, it is possible that only hood shrinkers are used when packaged goods are transported on the conveyor.
  • the machine may preferably have a control cam, in particular a slotted guide, for specifying the path of movement of the hood shrinker, including lowering in the direction of packaged goods, parallel movement with the packaged goods and lifting for removal of packaged goods of the hood shrinker. Thanks to the cam, the movement of the hood shrinkers in the plane perpendicular to the conveying plane can be realized so that a jerk and shock-free movement of the hood shrinkage is enabled, which also leads to a uniform heating of the shrink film.
  • a control cam in particular a slotted guide
  • a flap on the additional heating means which is designed so that it is opened by the lowered hood shrink, in particular via cams. This ensures that heat is only supplied from below when there is really a packaged product above the additional heating medium. This further improves the energy balance of the machine.
  • the machine may comprise a plurality of hood shrinkers, which are arranged in a row, so that successive packaged goods are überstülpbar.
  • hood shrinkers which are arranged in a row, so that successive packaged goods are überstülpbar.
  • a high throughput of the machine can be ensured without giving up the energy advantage of the moving hood shrinkers.
  • the machine may have a second conveyor belt whose speed is faster than that of the first conveyor belt, in particular, and which serves for the return transport of the at least one hood shrinker after shrinking the shrink film onto the packaged goods.
  • the invention further relates to a method for shrinking shrink film on packaged goods according to the features of claim 11.
  • This method can, as in the apparatus according to claim 1, energy losses, such as occur in known shrink tunnels due to the size of the tunnel, reduced become.
  • the hood shrinker completely overwhelm the packaged. This allows the most balanced possible heating of the shrink film.
  • the hood shrinker can be closed upwards. As a result, energy losses are avoided by rising heat.
  • the hood-type shrinker can be coupled onto a conveyor belt on the partial section, wherein the conveyor belt moves at the same speed as the conveyor. This makes it possible for a hood shrinker to be used only when a packaged item is being transported on the conveyor. By providing the conveyor belt synchronous Mitbelie is realized at the same time with simple means.
  • the hood can be moved by means of a control cam, in particular a control link on the article and put the packaged, then moved after slipping parallel to the packaged and moved back after shrinking from the packaged. Thanks to the cam, the movement of the hood shrinkers in the plane perpendicular to the conveying plane can be realized so that a jerk and shock-free movement of the hood shrinkage is enabled, which also leads to a uniform heating of the shrink film.
  • the packaged goods additional heat is supplied from below.
  • a film is placed around the packaged goods, in particular a container, which overlaps under the container.
  • This has the advantage that the connection seam is not visible to the consumer.
  • the heating means under the packaged goods can thus Container overlaps.
  • This has the advantage that the connection seam is not visible to the consumer.
  • the hood shrinker in the slipped state in particular via cams, open a flap under the conveyor, so that the heat can be supplied from below.
  • heat is only supplied from below, even if just a packaged goods is above the flap, this leads to further energy savings.
  • the hood shrinker after shrinking over a second conveyor belt in particular faster than the first conveyor belt to the beginning of the first conveyor belt are returned.
  • the machine running to install additional hood shrink on the second conveyor belt so as to increase the throughput, or to prepare the machine for a new product.
  • a high throughput is realized with a few hood shrinkers by the faster return transport hood hoods on the second conveyor belt.
  • the packaged goods in particular the film eye
  • nozzles in the side wall of the hood as uniform as possible heating of the film can be ensured and also in the case of blowing into the film eye, the increased shrinkage of the film in this area be guaranteed, so that the film can create the container.
  • the hood and packaged goods have no relative movement to each other, occurs no wind, which deflects the hot air and leads to poor shrinkage results in the film eye.
  • a plurality of hood shrinkers can be used successively, in order to thus pack a plurality of successive packaged goods.
  • a high throughput is guaranteed.
  • Fig. 1 shows a container 1 of several bottles 3, 5, which is partially covered with a shrink film 7.
  • This in Fig. 1 1 is an example of a packaged product which is packaged in a shrink-wrap shrinking machine according to the invention as explained in connection with the following figures.
  • a shrink film of predetermined length adapted to the container, so applied to the bottles 3, 5, that the two ends 9 and 11 below the bottles 3, 5 intersect or overlap surface.
  • the resulting from the wrapping with the shrink film 7 openings on the side of the container 1 is called foil eyes.
  • shrink film 7 Before shrinking the shrink film 7 loosely and usually holds the bottles 3, 5 not yet together. After shrinking the shrink film 7 fits tightly against the bottles 3, 5 and also closes, at least partially, the film eyes. Usually, when shrinking, the two ends 9, 11 of the shrink film 7 are welded together.
  • the container has 1 bottles. Cans or any other containers or articles could just as well be packed.
  • the number of vessels in the container 1 is arbitrary.
  • the individual vessels could also be arranged in a box or carton, which is then enveloped by the shrink film 7 together with the vessels.
  • an already prefabricated sleeve made of shrink film can be placed around the bottles 3.5 as well.
  • the overlapping area can also be another location. He However, it is preferably below the bottles, because then the interface is not visible because of the bottles standing thereon.
  • Fig. 2 shows a side view of an embodiment of a machine for shrinking shrink film on packaged goods, in particular for packaging of containers, according to the invention.
  • Fig. 2 shows six containers 1a to 1f, for example, containers, as in Fig. 1 shown. Regarding the characteristics and characteristics of the container is on the description of the FIG. 1 directed.
  • the enveloped with shrink film 7 container 1 are transported by a conveyor 21 in the direction of arrow F.
  • the conveyor 21 shown in the embodiment comprises a conveyor belt 23, which is deflected at the beginning and end respectively by rollers 25.
  • the conveyor belt 27 is in contrast to the conveyor 21 is not deflected in the plane, but perpendicular thereto, as later in connection with the Fig. 3 becomes clear, with other arrangements are also possible.
  • Four hood shrinkers 29a, 29b, 29c and 29d are coupled to this conveyor belt 27.
  • the number of hood headers 29a, 29b, 29c and 29d is only exemplary here.
  • the shrink-wrapping machine has at least one hood shrinker 29.
  • the hood shrinkers 29a, 29b, 29c and 29d shown here all have the same shape, which is additionally adapted to the shape of the container 1. If different containers with different shapes are conveyed on the conveyor 21, then hood shrinkers of different shape can be coupled to the conveyor belt 27.
  • the conveyor belt 27 moves at substantially the same speed as the conveyor 21 in the direction of the arrow F, and accordingly takes along the coupled-hood hoods 29a, 29b, 29c and 29d, which thus in synchronism with the conveyor belt 23 in the arrow direction.
  • a control cam 31 such as a slotted guide, the hood shrinkers 29a, 29b, 29c, 29d are moved according to a predetermined path not only in the conveying direction, but also perpendicular to the conveying plane.
  • the control cam 31 thus enables lowering of the hood shrinkers 29a, 29b, 29c and 29d during the forward movement, here in the area between hood shrinkers 29a and 29b, so that in the lowered area - at the height of the hood shrinker 29b - the hood shrinkers the container 1c slips over.
  • the hood shrinker 29b the container 1c completely over, depending on how the shrink film 7 is to be shrunk, but it may also be sufficient, the container only partially slipping over.
  • the hood shrinkers 29b and 29c the hood shrinkers move in a slipped-over state with the containers 1c and 1d located under the hoods synchronously with each other.
  • the hood shrinkers are then lifted again and moved away from the containers 1d and 1e.
  • a detection means 33 in particular a sensor, for example an optical light barrier, is provided.
  • This sensor 33 detects a passing container, eg container 1a, and outputs a corresponding signal to a control unit 35 from. Then one will Hood shrinkers 29a, 29b, 29c, 29d coupled to the conveyor belt 27 at the correct time.
  • the machine for shrinking shrink film 7 on packaged goods here on a container 1, a heating means 37, for example a hot air blower, below the conveyor belt 23. It can be arranged in an open-topped housing box. Heat is supplied to the bottom of the containers 1 a to 1 f with this heating means 37, so that in particular in the overlapping area 9, 11 of the shrink film 7 (see FIG Fig. 1 ) a welding of the ends of the film and beyond an additional shrinkage may occur.
  • flaps 39 close the heating means 37 from. Only when a hood shrinker 29a, 29b, 29c, 29d in the lowered state (as shown by hood shrinker 29b, 29c in Fig.
  • Fig. 3 now shows the already in Fig. 2 illustrated machine for shrinking shrink film on packaged goods schematically in a plan view.
  • hood shrinkers for example in case of defect, and / or add additional hood shrinkers to increase the throughput of the machine and / or replace the existing hood shrinkers with other hood shrinkers if packages of a different shape are to be packaged , If as few hood shrinkers are to be used, according to the invention the transport speed of the second conveyor belt 43 is greater than that of the first conveyor belt 27.
  • Fig. 4 shows an embodiment of a hood shrinker 51, as shown in the in the Fig. 2 and 3 shown machine used - referred to as hood shrinkers 29a to 29d and 45a to 45g.
  • the shape of the hood 53 is chosen so that it corresponds as possible in the interior of the shape of the container 1, with appropriately selected spaces must be present so that warm air can circulate. Since the shrinkage of the film 7 to the container 1, see Fig. 1 , takes place with the help of heat, a hood shrink 51 also has a heating means 55, in particular a heater, for example with electric heating rods with fan motor, on. The fact that each hood shrink 51 has its own heat source simplifies the construction of the machine for shrinking.
  • Fig. 5 shows a cross section of the hood shrinker 51 of FIG. 4 , The cut was carried out in the conveying direction F perpendicular to the conveying plane. It can be seen inside the container 1 with the bottles 3, 5 and the shrink film 7, the ends 9, 11 overlap under the bottles 3, 5. The hood shrinker 51 completely invades the container 1.
  • the hood 53 has a channel 55 along which warm air is supplied from the heater 55 with a blower 59 via nozzles 61 on the side surfaces and the upper surface of the shrink film 7.
  • the nozzles 61 could be designed to be controllable or adjustable according to a variant with a variable cross section.
  • Fig. 6 shows a further cross-sectional view of the hood shrink 51, but now in a sectional plane perpendicular to the conveying direction and perpendicular to the conveying plane.
  • the structure of the hood shrinker 51 is substantially the same as in FIG Fig. 5 illustrated and explained.
  • the same reference numerals in this case mean corresponding elements, to the description of which reference is made above.
  • the nozzles 61 are evenly distributed in both directions. However, it is possible in the region of the film eyes 63, 65, the nozzle 61st to rearrange in order to further improve the shrinkage result.
  • the volume of the interior of the hood 53 is only slightly larger than the volume of the container 1, the amount of air to be heated is low compared to the known shrink tunnels. Thus, unnecessary energy losses can be avoided. This is further enhanced by the fact that the hood preferably shields the warmed up space not only upwards, but also all around, ie the heat losses are minimized.
  • hood shrinkers driving the hood shrinkers with the containers allows the air to be optimally blown to the side of the film. This is due to the fact that the package does not pass the nozzle rows as in a shrink tunnel but remains stationary with respect to the nozzles, i. there is no relative movement in the conveying direction. Thus, no wind can occur, which can shrink the lateral film projection irregularly in the known shrink tunnels. Thus, an improved shrinkage result is achieved in the region of the film eye.
  • the sensor 33 outputs a signal to the control unit 35, the then a hood shrinker, 29a, coupled onto the conveyor belt 27 so that hood shrinker 29a and container 1b synchronously in the direction of travel, see arrow F, are moved.
  • the hood shrinker 29a then moves along the control cam 31, for example realized by a control link, and is lowered so that it at the level of container 1c this slips over (at the height of the hood shrinker 29b). In this embodiment, there is a complete slipping over.
  • hot air from the heating means 37 can also be supplied from below.
  • flaps 39 open below the conveyor belt 23. This can happen, for example, when driving over cams 41, 41 'by the hood shrinker 29b, 29c.
  • the ends 9, 11 of the shrink film 7, see Fig. 1 welded together and additionally shrunk.
  • the hood shrinker 29 d After the shrinking process, at the height of the hood shrinker 29 d, the hood shrinker moves away from the container 1 and is decoupled from the conveyor belt 27 at the height of the position B. Thus, a hood shrinker ran a part of the length of the packaged goods, here the container 1, in the conveying direction. The container 1f with the shrunk-on film jacket is transported away from the conveyor belt 23.
  • the decoupled from the conveyor belt 27 hood shrink then from the second conveyor belt 43 again, especially at an increased speed, transported back. There he can then, if necessary, be cached before he comes back to use.
  • hood shrinkers are used to make the throughput of the machine can be correspondingly high.
  • the hood shrinkers could be permanently coupled to their driving conveyor belt or the like, ie they would then travel at a certain mutual pitch in synchrony with the speed of the packs on a closed path.
  • a circular orbit could also be chosen, the containers being carried along synchronously, at least in sections, on a circular sector. This can be realized with relatively little effort by a carousel carrying several hood shrinkers on its periphery. Again, a rigid coupling of the hood shrinkers on the carousel is conceivable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Packages (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
EP07021763A 2006-12-20 2007-11-09 Maschine und Verfahren zum Aufschrumpfen von Schrumpffolie auf Packgut Not-in-force EP1935791B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006060109A DE102006060109A1 (de) 2006-12-20 2006-12-20 Maschine zum Aufschrumpfen von Schrumpffolie auf Packgut und Verfahren zum Aufschrumpfen

Publications (2)

Publication Number Publication Date
EP1935791A1 EP1935791A1 (de) 2008-06-25
EP1935791B1 true EP1935791B1 (de) 2009-12-23

Family

ID=39154134

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07021763A Not-in-force EP1935791B1 (de) 2006-12-20 2007-11-09 Maschine und Verfahren zum Aufschrumpfen von Schrumpffolie auf Packgut

Country Status (6)

Country Link
US (1) US7891157B2 (zh)
EP (1) EP1935791B1 (zh)
JP (1) JP5036518B2 (zh)
CN (1) CN101249902B (zh)
AT (1) ATE452829T1 (zh)
DE (2) DE102006060109A1 (zh)

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Publication number Priority date Publication date Assignee Title
DE102009003575A1 (de) * 2009-03-06 2010-09-09 Krones Ag Vorrichtung und Verfahren zur Wärmebehandlung von Verpackungsgütern
US20100293901A1 (en) * 2009-05-20 2010-11-25 Martin Malthouse Shrink Systems for Labels
EP2311734A1 (en) * 2009-10-16 2011-04-20 Ulma Packaging Technological Center, S. Coop. Packaging machine for wrapping products or batches of products, and packaging process
DE102010011640B4 (de) * 2010-03-16 2020-03-12 Khs Gmbh Schrumpftunnel zum Aufbringen von Schrumpffolien, Verfahren zum Betrieb oder Steuern eines Schrumpftunnels sowie Produktionsanlage mit einem Schrumpftunnel
DE102010021732A1 (de) * 2010-05-27 2011-12-01 Krones Ag Spleißvorrichtung und Verfahren zum Spleißen eines bahnartigen Flachmaterials
US20140020344A1 (en) * 2012-07-20 2014-01-23 Tzu-Chin Hung Shrink film heating device
CN102897354A (zh) * 2012-09-20 2013-01-30 上海普瑞福模具磨料有限公司 一种塑封包装方法
TWI655136B (zh) * 2014-06-27 2019-04-01 日商養樂多本社股份有限公司 Shrinking label heat shrinking device
WO2016069777A1 (en) * 2014-10-28 2016-05-06 Heat Seal Llc Packaging machine and method for fabricating sheet metal housing components
WO2016170695A1 (ja) * 2015-04-20 2016-10-27 大森機械工業 株式会社 包装機
NL2016934B1 (en) 2016-06-10 2018-01-16 Fuji Seal Int Inc Method, apparatus and system for attaching a label on a product
CN110127131B (zh) * 2019-05-27 2021-09-10 台州市黄岩明宇塑料厂 一种扁体瓶身用热塑贴合机构

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FR2332179A1 (fr) * 1975-11-21 1977-06-17 Sleever Sarl Appareil pour la retraction de film thermoplastique conforme en gaine autour de tout ou partie de recipients
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JP2001048127A (ja) * 1999-08-11 2001-02-20 I K Eng Kk 赤外線シュリンク装置
EP1335857A1 (en) 2000-11-01 2003-08-20 Claud Andrew Neagle Adaptable packaging machine heat shrink tunnel
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JP4802865B2 (ja) * 2006-05-29 2011-10-26 澁谷工業株式会社 筒状ラベル嵌装装置

Also Published As

Publication number Publication date
DE502007002396D1 (de) 2010-02-04
CN101249902B (zh) 2011-03-02
US7891157B2 (en) 2011-02-22
DE102006060109A1 (de) 2008-06-26
JP2008155998A (ja) 2008-07-10
CN101249902A (zh) 2008-08-27
ATE452829T1 (de) 2010-01-15
EP1935791A1 (de) 2008-06-25
JP5036518B2 (ja) 2012-09-26
US20080148691A1 (en) 2008-06-26

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