WO2003093114A1 - Verfahren zur herstellung einer verpackungseinheit und vorrichtung zur durchführung des verfahrens - Google Patents
Verfahren zur herstellung einer verpackungseinheit und vorrichtung zur durchführung des verfahrens Download PDFInfo
- Publication number
- WO2003093114A1 WO2003093114A1 PCT/EP2003/004352 EP0304352W WO03093114A1 WO 2003093114 A1 WO2003093114 A1 WO 2003093114A1 EP 0304352 W EP0304352 W EP 0304352W WO 03093114 A1 WO03093114 A1 WO 03093114A1
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- WO
- WIPO (PCT)
- Prior art keywords
- stack
- compression
- station
- insulation boards
- shrinking
- Prior art date
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Classifications
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- 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
- B65B63/00—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged
- B65B63/02—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for compressing or compacting articles or materials prior to wrapping or insertion in containers or receptacles
- B65B63/026—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for compressing or compacting articles or materials prior to wrapping or insertion in containers or receptacles for compressing by feeding articles through a narrowing space
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- 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
- B65B53/063—Tunnels
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- 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
- B65B2220/00—Specific aspects of the packaging operation
- B65B2220/24—Cooling filled packages
Definitions
- Natural fibers such as wool, flax, coconut, hemp, synthetic fibers such as polyester fibers or artificially produced glass fibers are suitable for the production of sheet-like or plate-shaped insulation materials for thermal and / or sound insulation.
- Mineral wool insulation materials represent the most important group of fiber insulation materials.
- the mineral fibers are piled up at a desired height and continuously transported away with the conveyor belt as mineral fiber mass.
- This type of stacking of an endless mineral fiber fleece formed from the mineral fiber mass is generally referred to as direct collection. Since the performance of the fiberizing devices used is not too high at a few hundred kilograms of mineral fibers per hour, several fiberizing devices are usually switched one after the other on a production line, that is to say a collection and conveyor belt.
- the bulk density of the mineral fiber fleece is also set depending on the conveying speed of the endless fiber mass flow.
- This mineral fiber fleece is then fed to a hardening furnace in which the thermosetting binders mentioned by way of example are hardened and the mineral fiber fleece is fixed.
- a hardening furnace in which the thermosetting binders mentioned by way of example are hardened and the mineral fiber fleece is fixed.
- hot air is drawn through the permeable mineral fiber fleece, so that the intensive energy transfer leads to a rapid hardening of the binders.
- the insulation felt and insulation boards made of glass wool have in common an extremely layer-like structure parallel to their large surfaces.
- This structure leads to a low thermal conductivity and a high deformability perpendicular to the large surfaces.
- the connection between the individual mineral fibers perpendicular to their longitudinal axis, i.e. the transverse tensile strength of the structure is very low.
- the stiffness of the insulation felts and insulation panels is significantly higher regardless of the direction of loading. Insulating felts made of glass wool can be rolled up easily and with a high degree of compression of up to approx. 60% without tearing and also largely regain their original thickness.
- This type of treatment complies with the fact that the thickness tolerances for application type WL in accordance with DIN 18165 Part 1 permit significantly greater over-thicknesses than is the case with insulation type W panels.
- the insulation felts can therefore be manufactured with a relatively large excess thickness to compensate for loss of strength and then compressed.
- Insulation panels made of glass wool may be compressed less highly in order not to fall out of a permissible thickness tolerance range. Since the degrees of compression are not infinitely variable, but in conjunction with the usual packaging units or large, packaging or transport units and in relation to the volumes, in particular the height of the means of transport (truck, railway wagon), compression levels of around 20% already result the packaging units at considerable cost savings.
- Stone wool insulation materials are made from silicate melts, which are rich in alkaline earths, iron oxides and, as network builders, contain not insignificant amounts of aluminum oxide. Stone wool insulation materials were originally only produced from diabase and chemically related basalts with small amounts of lime or dolomite. Today, the raw material mixtures contain high proportions of suitable residues from the manufacture of other materials and waste materials from the manufacture or recycling of mineral fiber insulation materials.
- the smelting wool previously produced mostly consisted of blast furnace slags and small additions of quartz-containing rocks. Blast furnace slags are also processed today in the production of stone wool insulation materials.
- the independent species of cottage wool is no longer offered in this country.
- the melt for the production of stone wool insulation materials has a very steep dependency of the viscosity on the temperature, so that only a narrow temperature interval is available for the mineral fiber formation.
- the melt is processed in so-called cascade fiberizing machines in the majority of the manufacturing plants. These machines usually have four staggered rollers rotating about horizontal axes. The melt is passed in a thin layer one after the other over the rollers. Depending on the speed of rotation, the presence of germs and the temperature, liquid bodies, which either take the form of spheres or fibers, as well as other intermediate forms, are released from the melt. In this way, about 50% by mass of usable mineral fibers can be obtained from the melt.
- the other half of the melt changes into spherical to columnar particles, which are separated from the mineral fiber mass by wind sifting. Nevertheless, about 25 to 30% by mass of spherical particles remain in the mineral fiber mass. With a throughput of up to approx. 5 t per hour, the fiberizing machines are much more powerful than the fiberizing devices used for the production of glass wool.
- the mineral fibers of the rock wool are bound with binders which, like in the production of glass wool, are dissolved in water or distributed colloidally. Sudden evaporation of the water removes so much energy from the particles formed from the melt in a very short time that the particles and thus the mineral fibers solidify glassy.
- the binder droplets present in the water vapor or aerosol mist are deposited on the mineral fibers and connect the individual mineral fibers point-to-point. With proportions of approx. 1.5 to approx. 4.5 mass% of organic binders, only a fraction of the mineral fibers formed are impregnated with binders or bonded to one another in this way. This also applies to the binding of mineral fibers in glass wool insulation materials.
- the individual mineral fibers of rock wool are much shorter than the mineral fibers of glass wool.
- the rock wool mineral fibers are curved in themselves and easily get caught in the air flow, forming more or less large flakes.
- the rock wool mineral fibers can be collected directly.
- the mineral fibers cannot be distributed completely homogeneously over the length, width and height of a mineral fiber fleece to be produced.
- an endless mineral fiber mass flow either has to be cooled by large amounts of water or the polycondensation reaction of the resin mixtures used continues, which leads to premature curing of the binders. Removing the water is associated with a high energy requirement and is therefore uneconomical. All of these negative aspects have resulted in the mineral fibers impregnated with binders being deposited on a conveyor belt and transported away in the thinnest possible primary fleece.
- the primary fleece is adequately cooled.
- This primary nonwoven is now meandering across the conveying direction of another conveyor belt on this second conveyor belt with the aid of a pendulum device.
- the thickness and width of the primary fleece for example 2 or 4 m and its basis weight, for example approx. 300 to approx. 800 g / m 2
- the secondary mineral fiber fleece is compressed more in the longitudinal and in the vertical direction. there the individual mineral fibers are brought into a steep position to the large surfaces of the secondary mineral fiber fleece and at the same time the bulk density of the mineral fiber mass is significantly increased.
- the hardening of the binding agent takes place with the stone wool insulation materials in
- Temperature depends on the volume and temperature of the room air drawn through it, the size of the mineral fiber fleece mass flow and its flow resistance due to the structure. The temperature of the surfaces of the mineral fiber fleece and the heat energy stored inside as well as the heat flow are different.
- the lower limit of the bulk density of stone wool insulation boards is currently around 24 kg / m 3 , which corresponds to around 15 - 17 kg mineral fibers / m 3 .
- the upper limit of the insulation boards produced in the manner described is approximately 55 kg / m 3 (38.5 kg mineral fibers / m 3 ).
- the mineral fiber equivalents are given here as essential representation elements because the unbound non-fibrous constituents have only an insignificant or no influence on the mechanical properties that are primarily relevant here.
- the endless web-shaped mineral fiber fleece is usually split lengthways in the middle and the insulation boards are separated from the partial webs in the desired width. If the plate formats differ, a different procedure can also be selected. Glass wool insulation materials can also be produced in one layer with small thicknesses. In order to obtain thin stone wool insulation boards, the endless mineral fiber fleece is already cut horizontally in two to four layers on the production line
- An insulation panel separated from the mineral fiber fleece consequently has a significantly higher rigidity and bending tensile strength in its longitudinal direction than transverse to its longitudinal direction.
- the stone wool insulation boards can therefore only be compressed with a significantly higher force and, because of the higher spring constant of the mineral fiber mass, also develop a correspondingly high counter or restoring force. If the deformation is too high, there is still a risk that the mineral fibers will break, be rearranged or that the bonds between the mineral fibers will be destroyed. This can lead to irreversible structural changes. Since the deforming forces primarily attack at right angles to the large surfaces, the desired nominal thickness is either no longer achieved or, when large stresses are released, this nominal thickness is exceeded in an impermissible manner.
- the separated insulation boards are freed of adhering sawdust and stacked one on top of the other or after one
- the height of the stack is limited by the weight of the insulation panels and by the still manageable size of a packaging unit formed from the stack. Stacking heights of approximately 20 cm to approximately 60 cm are therefore customary, but the height is preferably limited to below approximately 50 cm.
- the stack of insulation boards is covered with foils and / or banderoles, which hold the stack together and protect against environmental influences such as moisture. protect. Furthermore, the films and / or banderoles are used to handle the packaging unit.
- Films made from polyolefins such as polyethylene and copolymers with, for example, ethylene and vinyl acetate or polypropylene, have become because of their material properties, in particular their good shrink properties, the comparatively high visual strength at room temperature and other advantages in use and not least because of their favorable properties Particularly well-proven price.
- Polyethylene is created through the polymerization of ethylene.
- So-called high-pressure polymerization primarily forms branched polyethylene with low to medium density (low density poly-ethylene; abbreviation LDPE).
- the LLDPE types polyethylene have very low densities.
- the so-called low-pressure polymerization mainly results in linear polyethylenes with high density (high density poly-ethylene; abbreviation HDPE).
- the copolymerization with other unsaturated components allows the development of plastics with special properties.
- polyolfine is the generic term for polyethylene and copolymers, polypropylene, polymethylpentene, polyisobutylene and others.
- the PE films are used in thicknesses of approx. 25 to approx. 250 ⁇ m
- the PO films with thicknesses of approx. 8 ⁇ m to 35 ⁇ m, but in particular 15 ⁇ m to approx. 19 ⁇ m.
- Shrink films are mostly made from granules using the blowing and chill-roll process.
- the granules contain, among other things, lubricant concentrates, colorants, antioxidants and UV absorbers.
- the films are stretched in a second step, usually even biaxially, in order to reduce the thickness to the desired level and to increase the strength in the chain by orienting the molecular chains through external force. to reach this direction. While maintaining the tensile forces, the orientation state is fixed by cooling. Relatively high elastic components that lead to residual stresses should be retained. At higher temperatures, these internal restoring forces lead to the rapid reshaping required here, ie to shrinkage. With the biaxial stretching, the strength values in the longitudinal and transverse directions can be set in a targeted manner.
- the shrinkage force represents the force that is exerted by a specific test specimen during and after the action of heat if it is clamped at two ends in such a way that it cannot shorten. What is important here is the maximum heat shrinkage force, which is determined at a certain temperature and after cooling to room temperature. Specifics must be distinguished from this
- Shrinkage forces that are time-dependent. Another important property of shrinkable films is the stress relaxation, which indicates the decay of a stress in a deformed material if this deformation is kept constant.
- the stack of insulation boards is fed to a banding station on a conveyor belt and provided with a covering.
- banding stations for other items are in the already mentioned EP 1 050 466 A1 and EP 718 198 A1.
- these banding stations there are shrink film rolls above and below a conveyor level. Sheets of plastic film pulled off the shrink film rolls are brought together and connected to one another by a weld seam. As a result, they form a foil curtain.
- Corresponding banding stations are also used in the production of packaging units from a stack of insulation boards. The stack of insulation boards is conveyed against this film curtain, with the film sheets being tracked. Then the funding is stopped.
- a bar of a welding press arranged above the conveying plane is moved against a lower bar, for example arranged in the conveying plane.
- the jaws are covered with Teflon to prevent the foils from sticking.
- the merged thermoplastic films are heated to plastic flow and bonded together under pressure.
- the welding changes the structure of the interconnected plastic films. Only really good welds can achieve the breaking strength of the base materials.
- shrink films consisting of LDPE or mixtures of LLDPE and LDPE are preferably used.
- the thicknesses of the plastic films are reduced to approximately 20 ⁇ m to approximately 100 ⁇ m, preferably approximately 35 ⁇ m to approximately 65 ⁇ m.
- Heat pulse welding is preferred for joining the plastic foils.
- the heating elements are heated in a very short time by means of current surges, which are matched to the type and thickness of the foils to be connected. Double beams are used to produce two parallel welds. The two film webs are between the
- the band is significantly wider than the stack of insulation boards.
- the overhang on each end face of the stack of insulation boards can be a few centimeters or up to well over half the height of the stack
- Insulation boards are sufficient. Due to the resilience of the insulation boards and the shrinkage of the sleeve, a sleeve that is flush or only slightly wider is avoided. Otherwise there is a risk that the insulation boards at the ends of the packaging unit will slip out of the sleeve, which would primarily lead to visual impairment.
- the film sections protruding from the end faces of the stack hang down and lie on the conveyor belt.
- the stack of insulation boards with the covering made of plastic film is then fed to a shrink tunnel, as can be found, for example, in EP 1 050 466 A1, US 6 151 871 A1 or EP 1 044 883 A1.
- the plastic foils are heated with the help of heated air, which is brought up to the surfaces of the stack of insulation boards.
- the level of the air temperature is set after the throughput through the shrink tunnel and the thickness of the plastic films.
- a common temperature range is between about 130 and 170 ° C, for example.
- the banded stack of insulation panels lies on a well-permeable conveyor belt, which consists, for example, of metal bars or a wire mesh mounted at intervals.
- the thin metal rods which are mounted at a distance, do not hinder the contraction of the foils. After the shrinking process, the plastic films have laid tightly against the surfaces of the insulation boards of the stack and hold this stack together. Since the coefficient of friction of the insulation boards is very high, thin plastic films with low shrinkage are sufficient
- the air duct in the shrink tunnel is designed in such a way that the plastic films overhanging the end faces of the stack are bent over to the center of each end face and welded to one another in this position.
- the heating can be more intense here than in the area of the side faces of the stack in order to achieve a partial welding or a shrink wrapping.
- the plastic films fit tightly against the stack of insulation boards and thus stabilize them in the longitudinal direction.
- the film areas on the end faces, which are thicker and firmer due to the shrinking also allow hands to be gripped and the packaging unit to be handled.
- the plastic films which are mostly very thin in the area of the side faces of the stack and stretched due to the shrinkage, have a significantly lower strength, so that the wrapping is often damaged in these areas.
- the envelope often also has openings as a result of different heating or reduced shrinkage.
- the covering can tear open at the edges or in the area of the weld seams due to hard insulation boards. The reason for this is defective weld seams from the outset, but also the double heating of the seams. On closer inspection, there are also clear deformations of the plastic films or discoloration of colored plastic films in a range of approx. 10 to approx. 20 mm on both sides of the weld seams.
- the shrinking process results in an essentially uniform material thickness of approx. 63 ⁇ m, so that the differences in thickness lie within the measuring accuracy of a micrometer screw. In areas directly adjacent to the weld seams, however, the thicknesses are only approx. 50 ⁇ m.
- DE 101 46 765 A1 proposes to pack differently elasticized insulation panels together.
- the less pre-compressed or less elasticized insulation panels form the lower and the upper cover layer.
- the invention is based on the object of developing a method for producing a packaging and / or transport unit, consisting of a stack with a plurality of, at least two, insulation panels made of at least limited elastic material in such a way that the disadvantages of the prior art are avoided are, in particular, to achieve a simpler procedure for improving the stability of the casing and for protecting the insulation boards.
- the solution to this task position is that the stack of insulation boards in the casing is compressed before the wrapper is shrunk when the stack is compressed.
- the stack of insulation boards is compressed as a covering before the plastic film is applied and then subjected to heating with the covering in a compressed state, which serves to shrink the plastic film.
- the stack of insulation boards is first covered with the plastic film and then compressed and finally fed to the heating in the compressed state.
- the weld seams of film webs to be connected to one another, which form the coatings run parallel to the longitudinal axis of the stack along the at - the side faces of the stack.
- the weld seams or the surface areas of the plastic film with the weld seams are quickly cooled down, for example with air, CO 2 vapor (dry ice), finely sprayed water or an alternative cooling medium. This is to prevent these surface areas from being heated up more in the subsequent shrinking process and thereby shrinking more than the plastic film in the region of the further surface regions, in particular in the region of the side surfaces and / or end surfaces of the stack.
- the plastic films can be shrunk more in the area of the two end faces of the stack than in the area of the large surfaces of the
- the wrapping can be closed or partially open in the area of the end faces of the stack.
- the packaging units are successively fed to a compression station with an integrated decompression device at the intervals resulting from the cycle times of the banding station. At least this area of a device according to the invention is in one to avoid environmental influences on the result of the shrinkage of the plastic film
- the packaging units Before the packaging units enter the compression station, the packaging units are rotated and positioned by 90 degrees, so that the packaging units run into the compression station with one of their end faces first. This means that the insulation boards are compressed in their longitudinal direction and, in the case of stone wool insulation boards, exactly in the direction of the pendulum movement when the primary fleece is deposited. In the event of a steep increase in compression, this procedure reduces the risk of the insulation panels tearing open in one of their large surfaces.
- the compression station consists of a lower and an upper conveyor belt, which are arranged spaced apart in the housing. The distance between the conveyor belts is adjustable.
- the pressure-exerting conveyor belts with inclinations between approx. 1.5% and, in the case of well compressible insulation boards, are also up to 4% aligned.
- the inclination of the conveyor belt can be adjustable in relation to one another in order to be able to set different compressions for different insulation boards.
- the conveyor belts preferably consist of inherently pressure-resistant elements, for example of plastic plates stiffened with metal rods or of trough-shaped metal members.
- the conveyor belts are coated with, for example, polytetrafluoroethylene, silicone or the like in order to prevent the plastic films from sticking to the conveyor belts.
- the insulation boards in the packaging unit are compressed much more than the desired degree of compression in the finished packaging unit.
- This increase in compression can be up to about 50% and is only limited by the fact that irreversible damage to the structure of the insulation boards is to be avoided.
- This compression can effectively supplement a previous elasticization of the individual insulation boards.
- the plastic foils are heated, for example, with electrically heated coils or quartz rods with different heating outputs over the length of the compression station.
- the radiators equipped with reflectors can be arranged rigidly or swung up and down in regular movements.
- the distribution of the warm air can be supported by fans.
- the plastic film surfaces are heated with warm air, which is heated outside the housing and directed through nozzles onto the surfaces of the plastic film to be heated.
- the flow velocity can vary over the length of the stack of insulation boards to be treated. The flow velocity is normally so slow that the plastic foils are not pressed onto the insulation panels.
- the plastic films can also be fluttered in order to keep them free from the surfaces of the insulation panels. With the help of the nozzles, the plastic films can be blown with warm air heated to different heights.
- Dry superheated steam can also be used for particularly rapid heating.
- the heating can continue until the highest compression or can be ended beforehand after the plastic films have been sufficiently warmed.
- a reaction zone can be connected to the compression station, in which the packaging unit is held with the last degree of compression, so that the shrinking process starts or runs evenly. This process can be controlled by uniform temperature control of the room surrounding the packaging unit.
- the packaging units produced in this way generally result in an uneven shrinkage over the circumference of the packaging units. This also results in an increase in the material thickness of the plastic film that has shrunk the most over the side surfaces of the stack to, for example, approximately 180 to 200 ⁇ m, while the material thickness of the plastic film on the top and bottom of the stack is approximately 80 to 90 ⁇ m.
- the transition area should also be arranged at a distance from an adjacent edge of the stack of insulation boards, since there is a linear clamping point of the plastic film in the edge area and consequently the greatest strains can occur.
- the distance of the shrinkage-related transition area of different material thicknesses of the plastic film areas from the edge of the stack should therefore be more than approx. 2 cm. This distance can preferably be formed by targeted heating, possibly with additional cooling of the edge zones of the transition area.
- angle elements or screens are arranged on both sides of the packaging unit, which cover the areas of the plastic film that are not to be heated.
- These angle elements or screens can be provided, for example, on the conveyor belts in the compression station and / or shrinking station, the angle elements or screens with the conveyor belts passing through the shrinking station. Complete shielding of the side surfaces is more uniform to achieve this
- the edges of the angle elements or diaphragms can be wave-shaped.
- the vertical edges of the packaging units can also be sensitive to tears, since here clamping points are formed between the plastic films that had previously shrunk more on the end faces and zones that remain unchanged. In principle, this crack formation can be countered in a corresponding manner.
- a band can also be provided, the weld seams of which are arranged on the upper and lower top surfaces of the stack.
- This arrangement of the weld seams is possible if the insulation boards are placed upright against each other beforehand and then surrounded with the covering.
- the stack is rotated 90 degrees beforehand and either held to the side or compressed in the longitudinal direction until the band is applied.
- the band is pre-shrunk before the insulation boards are compressed and fed to the shrinking station in the compressed state.
- a further rotation of the packaged and provided with a pre-shrunk band or wrapping of insulation boards takes place by 90 degrees, so that the stack returns to its starting position.
- the end faces of the packaging units are not shrunk on.
- the shrinking of the plastic film areas protruding in the area of the end faces can be prevented, for example, by pressing these plastic film areas against the stack by means of vertically arranged laterally arranged side bands during the pre-shrinking and / or shrinking process and thus removing them from the effect of heat.
- This procedure leads to a banderole that is open at least after pre-shrinking, so that the plastic film in the shrinking station can be heated uniformly over the entire length of the packaging unit and consequently shrinks correspondingly uniformly. This reduces the tensile stresses and thus the risk of tearing in the plastic film, which enables the use of thinner plastic films, which leads to a reduction in packaging costs and the costs for the disposal of packaging materials on construction sites.
- the plastic films can also be heated with the aid of a preferably spirally moved laser steel.
- a multilayer film in particular a composite film, is used as the film or banderole, which has an increased tear strength with a lower degree of shrinkage.
- the above-described method is advantageously surrounded by a device which has a banding station in which a stack of a plurality of insulation boards arranged one above the other or next to one another, in particular of mineral fibers, is surrounded by at least one film which shrinks under the action of heat.
- this device tion on a compression station, in which the stack surrounding the film is compressed at least in the direction of the surface normal of the large surfaces of the insulation boards and / or in the direction perpendicular to the surface normal of the large surfaces of the insulation boards.
- a shrinking station is provided in the device according to the invention for carrying out the method according to the invention, in which the film is shrunk when the stack is compressed in such a way that the film in particular lies flat over at least part of the outer surfaces of the stack.
- film webs are welded together in the banding station by means of at least one welding bar to form a film curtain, against which the stack of insulation boards is conveyed.
- the film curtain By promoting the stack of insulation boards, the film curtain on the
- the upper and lower sides of the stack are arranged and finally connected to the sealing bar by a further welding process on the side surface of the stack opposite the leading side surface, which is then separated from the film webs.
- the film webs are guided by suitable, for example spherical deflection rollers and / or brush rollers with a symmetrical, outwardly directed spiral arrangement of the bristles, so that on the one hand the pull-off resistance of corresponding supply rolls is reduced and on the other hand the transverse fold formation in the film sections triggered by the train largely avoided.
- the tensile stress is reduced, which is caused by the stack of insulation boards running against the film curtain.
- a stop that can be moved into the conveying path can be provided, against which the insulation boards of the stack or the stack are aligned before the stack is banded.
- the stop can be pushed in or pushed out of the conveyor path in cycles.
- the Stop arranged in the area of the film curtain, so that the film curtain is arranged between the stop and the stack.
- Brush roller running at a speed opposite to the direction of conveyance is provided, which presses the film curtain onto the rear side surface of the stack of insulation boards when the welding bar is lowered.
- the deflection roller or brush roller can be supplemented by a second roller or a pressure plate. Due to the deflecting movements of the deflection roller or brush roller, whereby of course several deflection rollers or brush rollers can also be provided for the upper and the lower film web, as long as the weld seam is not carried out in the area of the conveying plane, the banderole is guided smoothly to the stack of insulation boards Avoid wrinkles.
- the wrapping or banderole produced in this way lies closely against the stack of insulation boards. It follows from this that a pre-shrinking process that is now to be carried out can be carried out with less energy and in a shorter time. In addition, due to the close contact of the plastic film with the stack of insulation boards, a thinner plastic film can be used, which can also be shrunk by lower energies in the subsequent shrinking process.
- the welding bar interacts with an abutment which is arranged in the plane of a lower conveyor belt in order to carry out the work
- weld seams as far down as possible, ie in the area of the lowest insulation board of the stack. Both welds are thus in the rich in the bottom insulation board of the stack. The subsequent pre-shrinking pulls the weld seams up from this original position.
- the welding seams can of course also be positioned in such a way that the front welding seam is, as always, placed in the area of the conveying plane and the rear welding seam is placed upwards, but this presupposes that the abutment for the welding beam is transferred to an upper position in which the Weld is formed.
- a procedure requires precise measurement of the dimensions of the stack and a correspondingly complex process control.
- a loose banderole is produced in the usual form.
- the stack of insulation boards is laterally affected by two acting on the end faces of the stack
- Cooling device is provided for the weld seam, the cooling device promoting in particular cold air, water mist and / or CO 2 vapor onto the weld seam. This is to prevent the already preheated areas of the plastic film with the weld seam in the subsequent shrinking station are heated and shrunk too much.
- the packaging unit is heated to a greater extent in the area of its underside lying on the conveyor belt, so that both weld seams provided in the area of the lowest insulation board are drawn into this area due to the greater shrinkage of the film in the area of the underside and are not subjected to greater thermal loads in subsequent shrinkage processes.
- the packaging unit formed in this way is aligned in the longitudinal direction and fed to a compression station with an integrated decompression device.
- this compression station the banded stack of insulation boards is compressed and decompressed in a guided manner in order to elasticize the insulation boards.
- This compression can either take place in a compression station already described above with two spaced-apart conveyor belts, or it can be carried out with a stamp which places insulation boards on the surface of the stack and compresses them and then decompresses them in a targeted manner. Alternatively, the compression can also be carried out between two stamps which can be moved towards one another.
- Conveyor belts can be integrated into the stamps, which carry out the pushing in and pushing out of a stack of insulation boards.
- the stack of insulation boards then reaches the shrinking station while maintaining the last compression, in which the wrapping or sleeve is shrunk on tightly.
- Embodiment of a device according to the invention for performing the method according to the invention is shown.
- the drawing shows: 1 shows a banding and shrinking station according to the prior art
- Figure 2 shows a banding station in side view
- Figure 3 is a side view of a compression and shrinking station
- Figure 4 shows the compression and shrinking station according to Figure 3 in
- Figure 5 shows another embodiment of a compression
- FIG. 1 shows a banding and shrinking station 2, 17 of a device 1 for producing a packaging and / or transport unit 16 from one
- This device 1 is known from the prior art.
- the banding station 2 consists of a lower conveyor belt 3, which has two conveyor belt sections arranged one behind the other, for conveying the stack 4 from a plurality of insulating material plates 5 in the direction of an arrow 6.
- the stack 4 is surrounded in the banding station 2 with a covering 7, which on the two side surfaces and the Surface and the bottom surface of the stack 4 and thus the insulation panels 5 rests.
- the sheathing consists of two plastic film webs 8 and 9 welded together, which are pulled off from film coils (not shown).
- the two plastic film webs 8 and 9 form a film curtain arranged between the conveyor belt sections, against which the stack 4 is conveyed by means of the first conveyor belt section of the conveyor belt 3.
- the plastic film webs 8 and 9 are welded together a second time, so that the Plastic film webs 8 and 9 form the closed wrapping 7 resting on four surfaces of the stack 4.
- the device 1 in the area of the banding station 2 has a welding bar 10 which can be moved in the direction of the arrows 11.
- An abutment 12 for the welding bar 10 is arranged in the conveying plane of the conveyor belt 3.
- the welding bar 10 and the abutment 12 are each U-shaped, the corresponding devices for forming welding seams 13 being arranged in the free ends of the legs of the welding bar 10, with which the welding seams 13 are arranged over the entire width of the plastic film webs 8, 9 extending linear connection points are formed.
- a separating device (not shown in more detail) is provided, by means of which the sheathing 7 follows
- the separating device can be designed, for example, as a heated metal wire.
- the banding station 2 has an upper conveyor belt 14, which serves on the one hand to promote the stack 4 and on the other hand to press the upper plastic film web 8 onto the stack 4.
- the conveyor belt 14 is arranged according to the arrow 15 in its distance to the lower conveyor belt 3 adjustable.
- the packaging unit 16 designed in this way is fed to a shrinking station 17 which has a heat-insulated housing 18 in which a conveyor belt 19 is arranged.
- the conveyor belt 19 consists of individual air-permeable chain links 20.
- a temperature is generated in the housing 18 by means of heat sources known per se, such as, for example, infrared radiators or the like, at which the covering 7 shrinks and lies closely against the insulating boards 5.
- the packaging unit 16 is then conveyed out of the shrinking station 17 and, after cooling, is sent for dispatch.
- the stations in device 1 shown in FIGS. 2 to 5 are distinguished according to the invention by the following improvements:
- a stop 21 is additionally provided within the banding station 2, which stop can be moved into or out of the conveying path.
- the stop 21 serves to align the stack 4 before the wrapping 7 is closed and, at the same time, to press the plastic film web 8 against the side surface of the stack 4 lying at the front in the conveying direction.
- the welding bar 10 has on its surface facing the conveyor belt 3 or the stack 4 a first upper roller 22 and a second lower, spring-loaded roller 23, which jointly on the plastic film web 8 in the region of the side surface lying at the front in the conveying direction lie against the opposite side surface of the stack 4 and there press the plastic film web 8 against the stack 4 in order to close the already during the welding of the two plastic film webs 8 and 9
- the roller 22 is also resiliently mounted in order to ensure that the stack 4 is in constant contact.
- the stop 21 is moved out of the conveying path and the packaging unit 16 is conveyed by means of the conveyor belts 3 and 14 of a combination shown in FIGS. compression and shrinking station 24, 30 fed.
- the packaging units 16 are rotated through 90 ° in front of the compression and shrinking station 24, 30, so that the packaging units 16 run into the compression and shrinking station 24, 30 with one end face of the stack 4 in front.
- the side surfaces of the stack 4 which run in the banding station 2 transversely to the conveying direction consequently run in the compression and shrinking station 24, 30 parallel to the conveying direction.
- the compression station 24 consists of an upper pressure belt 25 and a lower pressure belt 26, the compression station 24 being divided into a compression zone 27, a reaction zone 28 and a decompression zone 29.
- the pressure tapes 25, 26 are formed in such a way that the distance between the pressure tapes 25, 26 is reduced and the insulation boards 5 arriving there are compressed in the stack 4 together with the covering 7.
- the reaction zone 28 adjoins the compression zone 27, in which the pressure bands 25, 26 are at a constant distance from one another and in which the stack 4 of the insulation panels 5 is held with the last degree of compression of the compression zone 27.
- the shrinkage of the covering 7 takes place in this reaction zone 28.
- heat sources (not shown in detail in FIG. 3) are provided, which at least heat the reaction zone 28 to a temperature required for the shrinking of the casing 7.
- the length of the reaction zone 28 corresponds at least to the length of a packaging unit 16.
- the length of the reaction zone 28 is of importance insofar as it should be avoided to decompress part of the packaging unit 16 while another part of the packaging unit 16 is still being compressed. However, decompression can generally be done faster than compression.
- a cooling station 39 (FIG. 4) can be provided, with which the pre-shrunk envelope 7 is cooled in order to end any shrinking process which may still be ongoing.
- the side surfaces, ie those running parallel to the conveying direction Surfaces of the packaging unit 16 are zonally cooled with room or compressed air or a water mist.
- the reaction zone 28 thus also contains the shrinking station 30.
- the packaging unit 16 arrives in the decompression zone 29, in which the packaging unit 16 is decompressed in a controlled manner.
- This controlled decompression is particularly advantageous in the case of insulation boards 5 which have a relatively high restoring force. It must be taken into account here that the insulation panels 5 are compressed to the extent necessary. In the decompression zone 29, the overstressing of the insulation panels 5 can then be released at a low speed, without sudden tensile stresses leading to an expansion of the covering 7, which may lead to tearing of the covering 7 in its edge areas.
- the shrinking station 30 adjoining the compression zone 27 in the compression station 24 and shown in a top view in FIG. 4 has a multiplicity of warm air nozzles 31 which are connected to a central heating system 34 with a burner 35 via corresponding connecting lines 32 with fans 33 switched on therein are.
- a central heating system 34 with a burner 35 via corresponding connecting lines 32 with fans 33 switched on therein are.
- the wrapping 7 With the warm air, the wrapping 7 is initially slightly heated in the region of the side faces of the stack 4 in order to soften the wrapping 7. This heating takes place in the entrance area of the shrinking station 30 at the entrance to the reaction zone 28.
- the shrinking station 30 in the area of the shrinking station 30 in the area of the
- Heating system 34 with the burner 35 four parallel connection lines. At the end of the connecting lines 32, the warm air nozzles 31 are arranged, with which warm air is blown onto the side surfaces of the packaging units 16. Between the first warm air nozzle 31 and the second warm air nozzle 31 and between the second warm air nozzle 31 and the third
- Warm air nozzle 31 are arranged suction nozzles 36, which are also connected to connecting lines 37 running parallel to the connecting lines 32 and have a fan 38. Via the fan 38 the warm air, which was previously blown out of the warm air nozzles 31 onto the side surface of the packaging unit 16, is sucked off again, in order to merely heat and soften the wrapping 7 here.
- the casing 7 is then heated via two adjacent hot air nozzles 31 and shrunk to the desired size.
- the packaging unit 16 passes through the cooling station 39, in which the packaging units 16 are cooled in a controlled manner via corresponding cold air nozzles 40.
- the embodiment of a shrinking station 30 shown in FIG. 4 can be connected several times in succession within the compression zone 27 and the reaction zone 28.
- the hot air can be generated with different hot air nozzles 31. These can be individually heated or connected to a central heating system 34.
- the pressure belts 25, 26 as permeable conveyor belts, the excess warm air can escape upwards and / or downwards and be extracted there.
- the arrangement of the warm air nozzles 31 described above is provided on both sides of the pressure bands 25, 26. The same applies to the alternative heat sources described below. Of course, combinations of the heat sources on one or both sides of the printing bands 25, 26 are also possible.
- the infrared radiators 41 also shown in FIG. 4 can be provided alone or in addition to convection warm air devices.
- the devices for heating the casing 7 can be arranged rigidly, displaceable along the spatial axes and / or rotatable about the spatial axes. The warming of the
- Such areas of the sheath 7 that have not or only slightly shrinked can be formed with screens which cover the corresponding areas when the sheath 7 is heated.
- the diaphragms can also be designed as angle pieces and, in particular, with wavy edges, so that the cracks caused by a possible bursting of the cooled casing 7 cannot be extended unhindered along this transition area.
- quartz glass radiators on the back of which heating wires are printed.
- the printed heating wires are electrically heated and can, for example be arranged between two quartz glass panes.
- Such quartz glass emitters not only have the advantage of very precise control, but they also bring about energy transfer in all three ways, ie by means of heat conduction in direct contact, by radiation and by convection. The heating can be continued until the highest compression or can be ended beforehand after the films have been sufficiently heated.
- the quartz glass emitters can also be used with suction nozzles which pull the covering 7 onto the quartz glass emitters.
- a corresponding shrinking station 42 is shown in FIG. 5 and adjoins the shrinking station 30, which in FIG. 5 is designed with an alternative equipment for the heat radiators in comparison to FIG.
- the shrinking station 42 has a conveyor belt 43 which runs at right angles to the pressure belts 25, 26 according to FIG. 3 and adjoins them.
- the packaging units 16 removed from the shrinking station 30 are thus deflected from their original conveying direction into a conveying direction running at right angles thereto, without their longitudinal axis orientation being changed.
- the packaging units 16 reach the area of a warm air station 44 with two hot air nozzles 45 arranged opposite one another, which blow warm air onto the end faces of the stack 4 and the portions of the wrapping 7 that have not been shrunk there.
- the packaging units 16 are fed to a cooling air station 46 with two cold air nozzles 47, which blow cold air onto the wrapping 7 in the region of the end faces of the stack 4 in order to cool the sections of the wrapping 7 that have now shrunk there.
- the cold air nozzles 47 like the warm air nozzles 45, are also opposed to one another. arranged predominantly so that both end faces can be cooled at the same time. In this area too, gradient heating is advantageous, with which parts of the packaging unit 16 can be heated more.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Basic Packing Technique (AREA)
- Supplying Of Containers To The Packaging Station (AREA)
- Laminated Bodies (AREA)
- Wrapping Of Specific Fragile Articles (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10392088T DE10392088D2 (de) | 2002-04-30 | 2003-04-25 | Verfahren zur Herstellung einer Verpackungseinheit und Vorrichtung zur Durchführung des Verfahrens |
DE50303703T DE50303703D1 (de) | 2002-04-30 | 2003-04-25 | Verfahren zur herstellung einer verpackungseinheit und vorrichtung zur durchführung des verfahrens |
EP03727369A EP1501732B2 (de) | 2002-04-30 | 2003-04-25 | Verfahren zur herstellung einer verpackungseinheit und vorrichtung zur durchführung des verfahrens |
AU2003233071A AU2003233071A1 (en) | 2002-04-30 | 2003-04-25 | Device for the production of a packaging unit and device for carrying out said method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10219174 | 2002-04-30 | ||
DE10219174.3 | 2002-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003093114A1 true WO2003093114A1 (de) | 2003-11-13 |
Family
ID=29285039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/004352 WO2003093114A1 (de) | 2002-04-30 | 2003-04-25 | Verfahren zur herstellung einer verpackungseinheit und vorrichtung zur durchführung des verfahrens |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1501732B2 (de) |
AT (1) | ATE328798T1 (de) |
AU (1) | AU2003233071A1 (de) |
DE (2) | DE50303703D1 (de) |
WO (1) | WO2003093114A1 (de) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010024660A1 (en) * | 2008-08-27 | 2010-03-04 | Doeka Asia Sdn. Bhd. | A device for separating and packing elastic products |
EP2256044A1 (de) * | 2009-05-29 | 2010-12-01 | Seelen A/S | Kompressionsplatte |
EP2256043A1 (de) * | 2009-05-28 | 2010-12-01 | Seelen A/S | Vierteilige Ausgussanordnung |
EP2368800A1 (de) * | 2010-03-24 | 2011-09-28 | MULTIVAC Sepp Haggenmüller GmbH & Co KG | Einrichtung zum Transportieren von Objekten |
CN102897355A (zh) * | 2011-07-25 | 2013-01-30 | 克罗内斯股份公司 | 带有物品集冷却件的收缩设备 |
EP2289807A3 (de) * | 2009-08-25 | 2013-10-09 | Paroc Oy Ab | Verpackungs- und/oder Transporteinheit für Isolierplatten aus Mineralwolle sowie Herstellungsverfahren und -vorrichtung dafür |
WO2015154968A1 (de) * | 2014-04-09 | 2015-10-15 | Krones Aktiengesellschaft | Schrumpfvorrichtung mit gebindekühlung und verfahren zum erzeugen eines gleichmässigen, homogenen kühlmittelstroms |
WO2015199221A1 (ja) * | 2014-06-27 | 2015-12-30 | 株式会社ヤクルト本社 | シュリンクラベルの加熱収縮装置 |
WO2017210734A1 (en) * | 2016-06-08 | 2017-12-14 | Enviro Bale Pty Ltd | A bagging arrangement for bagging bales of compressed material and a method of bagging compressed material with said bagging arrangement |
EP3725693A1 (de) * | 2019-04-18 | 2020-10-21 | Herbert Bailer GmbH | Vorrichtung und verfahren zum erzeugen eines bedruckten folienverpackten dämmstoffelements |
US20230202698A1 (en) * | 2021-12-29 | 2023-06-29 | Tony Tateossian | Method of Shaping and Compressing Toilet Paper Rolls |
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US3958392A (en) * | 1973-12-05 | 1976-05-25 | H. G. Weber And Company, Inc. | Method and apparatus for heat shrinking film about articles |
DE4005541A1 (de) * | 1990-02-22 | 1991-08-29 | Rockwool Int | Verfahren und vorrichtung zum komprimieren und verpacken von platten oder rollen aus mineralwolle |
US5339605A (en) * | 1993-03-11 | 1994-08-23 | Signature Packaging Machinery, Inc. | Product compressor for shrink tunnel |
FR2771375A1 (fr) * | 1997-11-25 | 1999-05-28 | Saint Gobain Isover | Procede et dispositif de conditionnement de materiaux compressibles |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3362128A (en) † | 1965-02-12 | 1968-01-09 | Hayssen Mfg Company | Method of packaging articles |
FR2510515B1 (fr) † | 1981-07-31 | 1985-12-06 | Saint Gobain Isover | Procede pour le conditionnement de panneaux d'un materiau compressible et conditionnements realises par ce procede |
-
2003
- 2003-04-25 AT AT03727369T patent/ATE328798T1/de active
- 2003-04-25 EP EP03727369A patent/EP1501732B2/de not_active Expired - Lifetime
- 2003-04-25 DE DE50303703T patent/DE50303703D1/de not_active Expired - Lifetime
- 2003-04-25 DE DE10392088T patent/DE10392088D2/de not_active Expired - Fee Related
- 2003-04-25 AU AU2003233071A patent/AU2003233071A1/en not_active Abandoned
- 2003-04-25 WO PCT/EP2003/004352 patent/WO2003093114A1/de not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3958392A (en) * | 1973-12-05 | 1976-05-25 | H. G. Weber And Company, Inc. | Method and apparatus for heat shrinking film about articles |
DE4005541A1 (de) * | 1990-02-22 | 1991-08-29 | Rockwool Int | Verfahren und vorrichtung zum komprimieren und verpacken von platten oder rollen aus mineralwolle |
US5339605A (en) * | 1993-03-11 | 1994-08-23 | Signature Packaging Machinery, Inc. | Product compressor for shrink tunnel |
US5339605B1 (en) * | 1993-03-11 | 1998-08-04 | Signature Packaging Machinery | Product compression for shrink tunnel |
FR2771375A1 (fr) * | 1997-11-25 | 1999-05-28 | Saint Gobain Isover | Procede et dispositif de conditionnement de materiaux compressibles |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010024660A1 (en) * | 2008-08-27 | 2010-03-04 | Doeka Asia Sdn. Bhd. | A device for separating and packing elastic products |
EP2256043A1 (de) * | 2009-05-28 | 2010-12-01 | Seelen A/S | Vierteilige Ausgussanordnung |
EP2256044A1 (de) * | 2009-05-29 | 2010-12-01 | Seelen A/S | Kompressionsplatte |
EP2289807A3 (de) * | 2009-08-25 | 2013-10-09 | Paroc Oy Ab | Verpackungs- und/oder Transporteinheit für Isolierplatten aus Mineralwolle sowie Herstellungsverfahren und -vorrichtung dafür |
EP2368800A1 (de) * | 2010-03-24 | 2011-09-28 | MULTIVAC Sepp Haggenmüller GmbH & Co KG | Einrichtung zum Transportieren von Objekten |
DE102011052101B4 (de) | 2011-07-25 | 2023-10-05 | Krones Aktiengesellschaft | Schrumpfvorrichtung mit Gebindekühlung |
CN102897355A (zh) * | 2011-07-25 | 2013-01-30 | 克罗内斯股份公司 | 带有物品集冷却件的收缩设备 |
EP2551207A1 (de) * | 2011-07-25 | 2013-01-30 | Krones Aktiengesellschaft | Schrumpfvorrichtung mit Gebindekühlung |
EP2551207B1 (de) | 2011-07-25 | 2015-04-29 | Krones Aktiengesellschaft | Schrumpfvorrichtung mit Gebindekühlung |
WO2015154968A1 (de) * | 2014-04-09 | 2015-10-15 | Krones Aktiengesellschaft | Schrumpfvorrichtung mit gebindekühlung und verfahren zum erzeugen eines gleichmässigen, homogenen kühlmittelstroms |
CN106573692A (zh) * | 2014-06-27 | 2017-04-19 | 株式会社益力多本社 | 收缩标签的加热收缩装置 |
JPWO2015199221A1 (ja) * | 2014-06-27 | 2017-04-27 | 株式会社ヤクルト本社 | シュリンクラベルの加熱収縮装置 |
US11273941B2 (en) | 2014-06-27 | 2022-03-15 | Kabushiki Kaisha Yakult Honsha | Heat-shrinking apparatus for shrink labels |
WO2015199221A1 (ja) * | 2014-06-27 | 2015-12-30 | 株式会社ヤクルト本社 | シュリンクラベルの加熱収縮装置 |
WO2017210734A1 (en) * | 2016-06-08 | 2017-12-14 | Enviro Bale Pty Ltd | A bagging arrangement for bagging bales of compressed material and a method of bagging compressed material with said bagging arrangement |
EP3725693A1 (de) * | 2019-04-18 | 2020-10-21 | Herbert Bailer GmbH | Vorrichtung und verfahren zum erzeugen eines bedruckten folienverpackten dämmstoffelements |
US20230202698A1 (en) * | 2021-12-29 | 2023-06-29 | Tony Tateossian | Method of Shaping and Compressing Toilet Paper Rolls |
US11932437B2 (en) * | 2021-12-29 | 2024-03-19 | Tony Tateossian | Method of shaping and compressing toilet paper rolls |
Also Published As
Publication number | Publication date |
---|---|
ATE328798T1 (de) | 2006-06-15 |
DE50303703D1 (de) | 2006-07-20 |
EP1501732A1 (de) | 2005-02-02 |
DE10392088D2 (de) | 2005-06-09 |
EP1501732B2 (de) | 2010-07-28 |
EP1501732B1 (de) | 2006-06-07 |
AU2003233071A1 (en) | 2003-11-17 |
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