CH695610A5 - Method and apparatus for packaging of liquids and / or lumpy products in stand-up pouches. - Google Patents

Description

CH 695 610 A5

description

The present invention relates to a method according to the preamble of claim 1 and a system according to the preamble of claim 3.

For aseptic packaging of liquids and products with lumpy share today increasingly cost-effective stand-up pouch made of sealable composite films are used.

It is therefore an object of the present invention to provide an aseptic process for packaging of liquids and / or lumpy products, which is inexpensive and can be implemented preferably when using sealed stand-up bags from pre-printed composite film from role corresponding to FIG.

This object is achieved by the measures specified in the characterizing part of claim 1 measures.

Advantageous embodiments of the invention are specified in further claims.

The aseptic stand-up pouches offer the following advantages for pack sizes of 500-1000 ml compared to the packings made of cardboard composite material, which are most commonly used today - also called briquettes or cardboard packs.

The packaging material for aseptic stand-up pouches of sealable prefabricated composite film according to FIGS. 1 and 2 is over 30% cheaper than the printed composite packaging material of the corresponding Brik packing

As confirmation for this, it should be mentioned that a 1-liter carton pack requires 23 g of primary fibreboard, which at a price of Fr. 2200 .- / t of finished paperboard requires cardboard costs of CHF 0.05 per liter of pack ,

In comparison, the 1-liter stand-up pouch of Fig. 5 requires only a slightly higher proportion of plastic and aluminum foil, but no cardboard.

The aseptic pouch is environmentally friendly in comparison to the aseptic carton pack, because he, as already mentioned, next to the only insignificantly higher plastic and aluminum foil consumption does not require high-quality cardboard.

So must be used per 1-liter pack 23 g of high-quality cardboard, which corresponds to a carton consumption of 1 t (1000 kg) or converted to a wood requirement of about 2 m3 for each 43 500 packs.

Liquids and / or lumpy products can be packed with the aseptic process presented.

In the manufacture of tubes of the known carton pack with filling by a forming tube and transverse sealing by the product can not pack lumpy products.

The mechanical and aseptic security of the stand-up pouches with 7 mm wide sealing seams (without separating seams as in the PE pouch) (polyethylene pouch) and without seam intersections is very high.

The aseptic treatment of the packaging material is carried out in an immersion bath with H 2 O 2 solution and subsequent drying before molding the bag.

Aseptic treatment, shaping, filling and sealing of the bag are carried out in completely closed housings under aseptic conditions.

In this case, the packaging material web entry through a housing slot and the exit of the filled and sealed stand-up bag via a multi-part lock wheel. These solutions for housing inlet and outlet guarantee a high aseptic safety of the process with low H202 and energy requirements. The aseptic treatment of the packaging material web before forming the pouches eliminates the risk of H202 residues in the stand-up pouch.

The handling of the stand-up pouch from the store shelf to the consumer, as well as when opening, pouring and storing in the refrigerator is consumer friendly.

The disposal of the bag with 11 g tare for 1 liter, so with about 1/3 of the packaging material weight of the 1-liter carton pack and a much smaller waste volume is less expensive and less polluting.

Accordingly, the disposal costs for the stand-up bag are less high thanks to the eliminated cardboard content than the carton pack with the same filling volume.

The preparation of suitable for aseptic pouches composite films is significantly less demanding than the elaborate fabrication and provision of the cardboard composite and especially the longitudinally sealed cardboard sleeves for known packages.

It is therefore no system binding required for the user of this type of packaging, which allows a wider and cheaper packaging material procurement even with high quality standards.

The performance-related dimensions and costs of bottling plants for the aseptic packaging of the stand-up pouches are lower than in conventional known bottling plants.

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CH 695 610 A5

In addition, H202 and energy requirements, as already mentioned, lower than in the corresponding known systems.

The operating cost of the aseptic filling plant for stand-up pouch with packaging material from roll corresponds to that of filling systems for cardboard packs with packaging material from role. In systems for longitudinally folded and sealed carton blanks off the stack, it is larger because of the short carton magazine feed.

In the inventive aseptic packaging for stand-up pouches, the supply of a pre-printed composite film from roll via a splicer through a dense entry slot in a closed housing, prevail in the aseptic conditions.

In this closed housing, the packaging material web is drawn with a continuous roll preference by a dip with a 35% H202 solution and then dried.

After the aseptic treatment and packaging material web buffering, the forming of the stand-up pouches takes place via a forming wedge, as well as the centered sealing of the bottom seam and the vertical pouch seams, with a separate roller transport providing the switching-wise packaging material preference.

In another highly aseptic housing part of the flat-shaped stand-up bag is separated from the bag path and transferred to a switch-type moving pinion wheel.

In this happens the opening of the stand-up pouch by means of suckers, moldings and aseptic blowing air.

Subsequently, the filling of the stand-up pouch on several stations and the sealing of the bag top takes place.

The finished filled and sealed stand-up leave the highly aseptic housing part via a multi-part lock wheel, from which they are taken over with a tongs transfer and a tape transport for further packaging.

In the closed housing parts with aseptic conditions overpressure prevents contamination by penetrating air.

The invention will be explained in more detail for example with reference to drawings. 1 shows a packaging material structure for composite material with aluminum foil,

2 shows a packaging material structure for plastic composite material (with ethylene-vinyl alcohol copolymer EVOH), FIG. 3 shows a packaging material roll with unwound, printed packaging material web,

4 shows an embodiment of the filled and sealed stand-up pouch up to 500 ml (spatial mass in mm)

5 shows an embodiment of the filled and sealed bag up to 1000 ml, (spatial mass in mm)

6 is a schematic representation of the longitudinal section of the aseptic packaging system with packaging material from roll, splicer and printing device, closed housing with H2O2 bath, drying, continuous roll preference, buffering for moving packaging material web, bag formation and sealing, intermittent role preference, scissors and transfer of separated bag on tongs wheel,

7 shows an embodiment of the housing entrance for the packaging material web with labyrinth and supply of aseptic warm air,

FIG. 8 shows a cover of the upper edge of the stand-up pouch web fed with aseptic warm air between pouch forming and entry of the pouch web into the highly aseptic housing part, FIG.

Fig. 9 is a schematic representation of the longitudinal section through the hochaseptischen housing part of the packaging system (continued from Fig. 6) with bag transfer to switching moved Zangenrad for opening the stand-up pouch, filling and sealing the top, transfer from the tongs to the switching manner working lock wheel Carrying tongs and transition to the conveyor belt for further packaging,

10 is a schematic representation of the longitudinal section through the lock wheel at the return to the stand bag exit until the resumption of the bag with flushing of the empty chambers of the lock wheel,

11 is a plan view of the multi-part tongs wheel with bag transfer to the tongs, bag opening with

Suction cups, expanding wedges and blowing air, as well as the filling points for lumpy products and liquids, sealing devices for bag top, transfer tongs for bag transfer to multi-part lock wheel and pliers transfer of stand-up pouches on belt outlet,

12 is a diagram for the flushing of the various housing parts and the lock wheel with aseptic warm air under pressure and connections for cleaning the filling with CIP and the filling housing and lock wheel with water from spray nozzles and for the sterile treatment of the organs and housing parts with sterile hot air, also the supply of the 35% H 2 O 2 solution to spray nozzles and immersion bath for the packaging material web,

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CH 695610 A5

Fig. 13 is an elevational view of the aseptic packaging system for stand-up pouches with twin roll unwinders, aseptic

Treatment for packaging material web, continuous roll preference, packaging material web buffering, stand-up pouch forming and sealing with drive elements, filling and sealing in the tongs wheel with drives, lock wheel and onward transport,

Fig. 14 is a plan view of the aseptic packaging plant with Doppelrollenabwickler, aseptic packaging material treatment, pouch forming and sealing, with tongs wheel for opening, filling and closing the stand-up pouch, as well as Schleusenrad and transition of the stand-up pouch on the tape outlet.

In the aseptic method described below, stand-up pouches made of printed flexible packaging material provided with centering marks, for example composite foils 1, 7, can be used with a packaging material construction according to FIGS. 1 to 3 or other equivalent combinations.

In FIGS. 1 to 3, the reference signs have the following meaning:

902

903

904

Inner layer, e.g. 60 g / m NDPE (low-pressure polyethylene) laminating agent

Barrier material, e.g. 0.008 mm aluminum foil

905

Outer layer, e.g. 12-14 g / m polyester

906

4/5 color print

908

Barrier material, e.g. 35-40 g / m EVOH

909

Light protective layer

B

Stand-up pouch-width

H

Stand-up bag height b

Width for floor fold

BR

Roll width = 2xH + b

ZM

centering mark

A thus produced stand-up pouch 8, 8 'according to FIGS. 4 and 5 has in a known embodiment on its underside a circular sealed Bodenfalt 9, 9' for the formation of the stand bag bottom. In this case, the bottom fold 9, 9 'is also held together without a sealable outer packaging material side in a known manner with a seal through the punched-out holes 10, 10' in the lateral edges.

All sealing seams of the stand-up pouches are sealed inside against the inside (finseal) in widths of at least 6-7 mm. They are therefore strong in safe tightness.

In the case of the aseptic process carried out with the aid of the installation according to FIG. 6, the printed composite packaging material 1, 7 provided with centering marks and sealing holes 10, 10 is a double-roll stand 11 with rolls 12, 12 'for a running time of approx Taken 6 hours and then fed via a splicer 13 and a printing device 14 for price and date imprint of the system, which has the closed housing parts 15, 28 and 39.

In this case, the entry of the packaging material web 1, 7 in the closed housing part 15 via a labyrinth 16 with a sealed inlet slot 17 and an exit column 17 'as shown in FIG. 7. This labyrinth 16 is supplied through a nozzle 18 with aseptic hot air, so that the overpressure in the labyrinth 16 and in the housing part 15 prevents ingress of outside air into the housing part and thus possible contamination.

6 has a continuously rotating Rollenvorzug 19 which pulls the packaging material web 1, 7 in the closed housing part 15 by a dip 20 with a 35% H202 solution, then pressed with a pair of rollers 21 and with aseptic hot air from blowing nozzles 22 and with the help of heat radiators 23 dries.

After the continuous packaging material preference 19 a double roller rocker 25 is arranged, which serves as Packstoffpuf- ferung, which forms the transition to the switch-operating preference for the production of a steel bag web 24.

To control the supply of packaging material in the buffering formed, for example, by the double roller rocker 25, light switches 26 and 27 act in such a way that when the switch 26 is activated by the rocker 25, the regulating motor of the preferred group 19 accelerates the preference and if the supply of packaging material is sufficient, that is to say in response of the light switch 27, reduced.

The switch packaging material transport for the pouch forming and sealing is carried out in a likewise closed and aseptically held housing part 28 by a Rollenvorzugs 29, whose control is carried out by a print mark Reflexzentrierung 30.

After the packaging material web buffering with the double roller rocker 25, the packaging material web 1, 7 reaches a wedge forming station 31 with a bottom forming blade 32 for the folding of the bottom bag bottom 9 of the bag web 24.

After the wedge-forming station 31, the closing or folding of the bag web 24 takes place with roller guides 33 and 33 '.

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CH 695 610 A5

The housing parts 15 and 28 are separated by a partition wall 34 with a vertical slot 34 for the bag web passage.

In the housing part 28, in which there is also overpressure, takes place at a first station, the sealing of the stand bag bottom with sealing jaws 35th

On the next two stations, the vertical bag seams are sealed with sealing jaws 36 and then cooled with cooling jaws 37 and thus made immediately resilient.

The housing part 28 is connected via a partition wall 38 with a hochaseptischem housing part 39, which has a vertical slot 38 * through which the sealed stand-bag web 24 is guided. The housing part 39, which is also against a possible ingress of atmospheric outside air under pressure, is for the opening, filling and closing of the stand-up bag 40, is provided.

In the housing part 39 is a scissors 41, a centered separation of the bag 40 of the bag web 24 and with a transfer gun 43 whose transfer to a switching manner operating Zangenrad 42 performed.

Between the partitions 34 and 38, the stand bag web 24 is covered at the top (Fig. 6 and 8) with hoods 44, the half 45 is hinged. These hoods 44 are fed through ports 46 with aseptic warm air so that no germs that may be present in the closed aseptic housing part 28 can penetrate into the open-top bag web 24 köfmefh

In addition to the aseptic treatment with the mentioned H 2 O 2 dip 20, the packaging material web 1.7 may after drying 22, 23 and the packing buffer 25, but before forming the bag web 24 in the wedge forming station 31, on the inside with ultraviolet Be irradiated 47, wherein any dust particles on the packaging material inside can be removed from a flat nozzle 48 before the irradiation with blown air.

As mentioned, the opening, filling and closing of the stand-up pouch 40 according to FIGS. 9 and 11 takes place on the multi-part, switching-type moving toothed wheel 42 in the closed, highly aseptic housing part 39.

This housing part 39 is, as shown in FIG. 11, closed relative to the housing part 28 by the partition wall 38 and with respect to the outside atmosphere by a multi-part lock wheel 69.

Also in this housing part 39 is provided by supplying aseptic hot air pressure to prevent the possible ingress of outside air and thus contamination. For the passage of the stand-up bag web 24 through the partition wall 38, the slot 38 'is provided.

As described, the transfer of the separated from the bag path 24 bag 40 with the transfer tongs 43 on the tweezer wheel 42 at the wheel station A takes place (Fig. 11).

On this tongs 42, the stand-up pouch 40 are taken over and held in the radial position by inner tongs 49 and outer tongs 50.

The inner tongs 49 are fixedly mounted on the tongs 42, while the outer tongs 50 can be moved to radially arranged rectangular guides 51 with rollers 52 of the tong body 50 '.

This displacement of the outer pliers 50 is done via the rollers 52 by a controlled rail lever 58 and fixedly mounted guide rails 60. At the same time limit internal stops 59 and outer stops 59 ', the displacement of the outer tong body 50'.

The opening of the tongues 49 and 50 closed with torsion springs on the tongs wheel 42 takes place with controlled roller levers 53 and 53 'via tongs lever 54.

When opening the stand-up bag 40 by two suckers 55 and by dipping an expanding wedge 56 on station B, as well as an expanding wedge 57 on station C, the same is done.

In this case, the outer Beutangenangen 50 are moved over the pliers roller 52 with the rail lever 58 in two stages for the immersion of the expanding wedges 56 and 57 at the stations B and C against the Zangenradzentrum for this molding.

The thus displaced outer pliers 50 are held by the displacement inwardly with the stops 59 and against the outside by the guide rail 60 in position.

Lifting the suction cups 55 over the opened stand-up pouch 40 allows them to pass through.

The full molding of the stand-up pouch 40 is carried out in the station D by a controlled blowing of aseptic hot air through a nozzle 61st

Subsequently, the formed, open-topped bag 40th

- In Stations E and F via nozzle 62 with lumpy products and

- Be filled with liquid at stations G and H via connection 63.

The distribution of the filling process on several stations allows a slow and therefore careful filling.

CH 695 610 A5

When switching transport of the hanging in the pliers 49 and 50 filled stand-up pouch 40 prevent the both sides mounted guide plates 64 swinging the bag and thus spilling over the contents.

After the filling process takes place between stations H and J and J and K stretching the top of the filled stand-up pouch 40 by means of the guide rail 60 on the roller 52 outwardly displaced outer pliers 50, which is also called bag tongs.

Subsequently, in the stations K and M, the stretched stand-up pouches 40 are tightly sealed on the upper side by controlled heating jaws 66.

In the station O, the transfer of the ready-sealed stand-up pouch 67 by means of a clamp transport 68 to a multi-part, switching manner moved lock device 69 (Fig. 9,10 and 11), which is preferably a lock wheel.

In the lock wheel 69, the same overpressure prevails as in the housing part 39.

The lock wheel 69 includes a co-rotating bottom 70 and co-rotating chamber walls 71, and a fixed cylindrical outer wall 72 and a fixed cover 73rd

The rotating chamber walls 71 and the lock wheel floor 70 are sealed with respect to the stationary lock wheel parts with seals 74 and 75.

[7] In heri combs rips fichleusenrades 69 hang the fitandhentel 67 vnn fixed tang 76 and heweglichen, fe-dergeschlossenen pliers 77, which can be opened by lever 78 and roller lever 79 and 79 ', wherein the pliers 76, 77 preferably formed as brackets could be.

A swinging of the hanging of the brackets 76, 77 standing bag 67 is prevented by lateral bag guides 80.

After passing through the sluice wheel 69, a discharge conveyor 81 carries out a discharge of the completely filled stand-up pouch 67 onto an outlet conveyor 82.

After the exit of the finished filled stand-up pouch 67 from the sluice wheel 69, the empty chambers continue to rotate in a switching manner at the same level according to FIG. 10 to the initial position.

In this case, a rinsing with aseptic hot air caused by the Beu-telaustrag in the chamber outside air through supply nozzle 83 and outlet port 84.

The empty chambers of the lock wheel 69 reach the opening for receiving the filled stand-up pouch 67 after the rinsing with a slight overpressure. However, this overpressure is always below the pressure prevailing in the housing part 39 with the tweezer wheel 42.

By these measures, penetration of atmospheric outside air into the housing part 39 and thus a possible contamination of the open standing bag 40 and the aseptic product is prevented.

The start-up of a packaging installation which operates in accordance with the aseptic method described above takes place as follows (FIG. 12):

the control and maintenance of the internal organs is carried out via lidded housing openings 85 and 110 and via an opening in the sluice wheel cover 73 (FIGS. 6, 9 and 11),

- The cleaning of the housing part 39 in which the tongs are 42 and the Fait- and drive members are performed with sprayed via spray nozzles 86 hot water,

the cleaning of the filling system is carried out with a ClP device 87 (cleaning in place), the connections of which can be swung under the filling nozzles 62 and 63,

- The sterilization of the interior of the housing parts 15, 28, 39 and 69, and all organs in the interior of said housing parts is performed by aseptic hot air of 180 ° C for at least 30 min., With a fan 88, a heater 89, an aseptic filter 90 and an auxiliary heater 91 is supplied with open valve 92 and closed valve 93 via the distribution lines 94 to the housing parts, wherein the valves 92, 93 are preferably M-flaps.

During operation of this aseptic packaging installation, with the M-flap 92 closed and the M-flap 93 open, the system is supplied with aseptic warm air via the fan 88, the heater 89, the aseptic filter 90, a line 95 and the connecting pieces 18, 22, 46, 48, 83 and 96 supplied. The fine adjustment of the amount of hot air is done by throttle 97.

To open a bag 40, the supplied aseptic hot air with an additional fan 98, a booster heater 99 and a solenoid valve 100 is clocked and blown through the nozzle 61 in a stand-up pouch.

The return of the air via an outlet nozzle 101 and lines 102, 103 fresh air can be mixed with an M-flap.

As described above, the pressure in the housing parts 15,28,39 and 69 must be above the atmospheric pressure of the outside air, so that no outside air penetrate into said housing parts, thereby causing contamination of the upholstery bag material and the product.

CH 695 610 A5

In order to produce and maintain aseptic conditions in the housing parts 15, 28 and 39, a 35% H 2 O 2 solution can be injected with a spray nozzle 105, which can be injected from a container 106 with a pump 107, via an M-valve 108 and a Line 109 is supplied. The system may include a plurality of gauge 104 (FIG. 12) and relief valves (FIG. 11).

With the same line 109 and the immersion bath 20 can be charged.

To observe and control the packing pass and the internal organs, the housing parts 15, 28 and 39 may be provided with interior lighting and the housing covers 110 may be provided with macrolone disks (FIG. 11).

The data of a packaging installation according to the described aseptic method for stand-up pouches from roll are, for example:

- Format range for stand-up pouches: 250 to 1000 ml, adjustable with appropriate equipment, stand-up pouch 500 ml according to FIG. 4, stand-up pouch 1000 ml according to FIG. 5,

- Machine capacity: approx. 4000-5000 stand-up pouches / h, depending on the product and format

- Dimensions of the aseptic packaging system. Outline of Fig. 13 Plan view of Fig. 14

- Operation: 1 person.

Claims (10)

claims 1. A method for packaging liquids and / or lumpy products in stand-up pouch (8,40) of flexible packaging material (1, 7) from the roll (12,12 '), characterized in that the packaging material of a largely closed system (15, 28 , 39), in which overpressure prevails and in which the stand-up pouches (67) are filled and completely closed, and that the closed stand-up pouches (67) are removed from the system (15, 28, 39) via a lock device (69) , 2. The method according to claim 1, characterized in that for packaging with aseptic treatment of the packaging material (1, 7) is supplied to a sealing labyrinth (16) that after passing through this labyrinth from the packaging material a packaging material web is formed and aseptic treatment ( 20-23) of the packaging material (1,7) takes place, that then a stand-bag web (24) is formed and sealed, and that then the stand-up pouches (40, 67) are opened, filled and closed. 3. Plant for carrying out the method according to claim 1 or 2, characterized in that the system comprises a housing part (15), the input side for receiving the packaging material (1, 7) a labyrinth (16) with a sealed inlet slot (17) and an exit slit (17 '). 4. Installation according to claim 3, characterized in that the system comprises a second housing part (28), in which a Rollenvorzug (29) is housed, through which an open at the top of the stand-bag web (24) can be pulled. 5. Plant according to claim 4, characterized in that a third housing part (39) is present, which has a multi-part, switching manner moving tongs (42) to transport the stand-up pouch (40) in the radial position with the shortest possible switching path, and a Lock device (69), which serves to remove the sealed stand-up bag. 6. Plant according to claim 5, characterized in that the three housing parts (15, 28, 39) arranged in series and largely closed, but are connected by partitions, each having a slot, and that in the three housing parts by supplying aseptic Air under overpressure conditions aseptic conditions prevail. 7. Installation according to claim 5 or 6, characterized in that the tongs (42) pliers (49,50) to hang the stand-up bag (40) in spaces which are delimited by at least approximately radial guide plates (64), and or that the lock device (69) further tongs (76, 77) to hang the stand-up pouch (67) in spaces that are at least approximately delimited by further guide plates (80), and that all these guide plates (64, 80) are provided to prevent the switching movement of the wheels swinging the stand-up pouch (40, 67). 8. Installation according to one of claims 5 to 7, characterized in that the lock device (69) is designed such multi-part and switchable movable that during discharge of the filled and sealed stand-up pouch (67) is avoided that atmospheric outside air can penetrate into the system in that the outside air, which flows into the lock chambers when the bag is dispensed onto the belt outlet, is flushed out through the aseptic air supplied through the connection (83) during the return of the empty lock chambers and through air escaping through the connection (84). 9. Installation according to one of claims 3 to 8, characterized in that for the creation of aseptic conditions after a cleaning process with hot water, a first circuit for injecting a H 2 O 2 solution through nozzles (105) and a second circuit with a fan (88), at least a heater (89, 91), a filter (90) and lines (94) and nozzles (18, 46, 83, 96) are provided for a blowing of aseptic hot air for a predetermined time, and that for maintaining the aseptic operating condition further Lines (95) and 7 CH 695 610 A5 a valve (93) is provided with the blower (88), the heater (89), the filter (90), these further lines (95) and further nozzles (18, 22, 46, 48, 83, 96) Form a third circuit to lead air to the plant and thus to create an overpressure that prevents contamination of the product and the bag material. 10. Installation according to one of claims 5 to 9, characterized in that for opening the stand-up bag (40) at least two stations with suckers (55), expanding wedges (56,57) and at least one Blasluftdüse (61) and for filling the sterile product at least two filling points (62, 63) are present. 8th