EP2289807B1 - Packing and/or transport unit for insulation slabs of mineral wool and method for manufacturing such - Google Patents

Packing and/or transport unit for insulation slabs of mineral wool and method for manufacturing such Download PDF

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Publication number
EP2289807B1
EP2289807B1 EP10173051.3A EP10173051A EP2289807B1 EP 2289807 B1 EP2289807 B1 EP 2289807B1 EP 10173051 A EP10173051 A EP 10173051A EP 2289807 B1 EP2289807 B1 EP 2289807B1
Authority
EP
European Patent Office
Prior art keywords
slabs
bundle
mineral wool
thickness
precompressed
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
EP10173051.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2289807A2 (en
EP2289807A3 (en
Inventor
Erik ÅSTRAND
Bjarne Walli
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.)
Paroc Hold Oy AB
Original Assignee
Paroc Oy AB
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 Paroc Oy AB filed Critical Paroc Oy AB
Publication of EP2289807A2 publication Critical patent/EP2289807A2/en
Publication of EP2289807A3 publication Critical patent/EP2289807A3/en
Application granted granted Critical
Publication of EP2289807B1 publication Critical patent/EP2289807B1/en
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
    • 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
    • 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
    • B65B35/00—Supplying, feeding, arranging or orientating articles to be packaged
    • B65B35/30—Arranging and feeding articles in groups
    • B65B35/50—Stacking one article, or group of articles, upon another before packaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/07—Containers, packaging elements or packages, specially adapted for particular articles or materials for compressible or flexible articles

Definitions

  • the present invention relates to a method for manufacturing a packing and/or transport unit for insulation slabs of mineral wool, in which a number of mineral wool slabs are arranged next to each other with the main surfaces against each other and packed in a wrapper that keeps them in a compressed state, whereby a cohesive bundle of mineral wool slabs is obtained.
  • the present invention also relates to a packing and/or transport unit for insulation slabs of mineral wool, in which a number of mineral wool slabs are arranged next to each other with the main surfaces against each other and packed in a wrapper that keeps them in a compressed state so that they form a cohesive bundle of mineral wool slabs.
  • the present invention also concerns a device for performing the method of the invention.
  • Mineral wool is manufactured by melting compound stone material in a coke or electric furnace. Liquid stone is fed to a spinning machine that makes the melt into cooled fibre while simultaneously different substances are added to the fibre. The fibre mass is collected on a collecting conveyor and carried to a pendulum that oscillates out the collected primary fibre mat to a so-called secondary mat, which is fed into a curing furnace. Sometimes the secondary mat can be pre-treated in a number of ways before curing.
  • the mat is led in a continuous stream through the curing furnace where the fibre mass is locked into a desired structure suitable for the respective product types. At the same time the cured mat is given a desired thickness.
  • the slabs are formatted from the cured mat later in the process.
  • the process leading up to the cured mat is relatively stochastic. Natural variations in raw materials, processing materials, the condition of the process line, etc. makes the consistence of the cured mineral wool mat vary. In the factories one often talks about the production line's "day condition” or “instantaneous condition”. Although one often knows or can deduce the causes of deviations, it is virtually impossible to avoid variations .
  • a disadvantage of packing and/or transport units produced in the above-described known manner is that the slabs in a bundle forming the packing and/or transport unit under the influence of first the packing machine's (different packing machine types deform more or less) and then the following wrapping's compressing force being affected differently over time so that they get different dimensions and densities.
  • At least the two outermost slabs in the bundle i.e. the undermost and the topmost slabs when the slabs in the bundle are viewed horizontally oriented with respect to their main surfaces, over time assume a clearly smaller thickness and thus higher density than the other slabs in the bundle.
  • the method according to the invention is characterized in that the mineral wool slabs to be packed in the same wrapper to form a bundle are selected amongst mineral wool slabs having essentially the same initial thickness and initial density and that of these selected slabs that/those slab/slabs that is/are to be placed in the middle of the bundle before they are packed together with all the other slabs are precompressed flat to a predetermined degree with respect to their thickness and then decompressed to an intermediate thickness which is less than the initial thickness, but greater than the thickness of the slab when it is in the precompressed state in the plane press so that at the time of packing the slabs in the said wrapper are of higher density and less thickness than the slabs to be placed outermost in the bundle so that at the time of removal of the wrapper after storage and/or transport in the compressed state all the slabs are of essentially the same final thickness and density.
  • the ratio between the number of not precompressed/decompressed outer slabs and the number of precompressed/decompressed inner slabs in the bundle is 4:16-2:1 before they are packed in wrappers for storage in a compressed state
  • Example 1 In a package with a total of three slabs the two outermost slabs are not precompressed/decompressed.
  • Example 2 In a package of eight slabs either the two or four outermost slabs can be not precompressed/decompressed.
  • Example 3 In a package with a total of 20 slabs, the either four or eight outermost slabs can be not precompressed/decompressed.
  • the thickness of the package in all these examples is e.g. 800 mm).
  • the degree of precompression and decompression is preferably substantially similar in all the inner slabs exposed to the precompression and decompression.
  • the degree of precompression/decompression can also take into account the production line's day condition or instantaneous condition.
  • Compression and decompression occurs primarily through at least one continuous plane press with adjustable precompression and decompression force arranged between the formatting and packing unit. It is especially advantageous to measure the necessary precompression and decompression to ensure as consistent a quality as possible in size and density of all slabs with respect to the time of removal of the wrapping after storage and/or transportation.
  • precompression and decompression usually only take place in parallel (thus the location and time should be reserved on the production line).
  • the slab that also can be a combination slab (cut in the middle), goes into the precompression/decompression/testing unit, stops, is tested/precompressed, held at pressure a preset time, decompressed, moved on and the same process is repeated. Under particularly favourable production conditions the slabs can pass non-stop during the testing/precompression step. Therefore a stop is not necessary. This is product dependent.
  • the package and/or transport unit for insulation slabs of mineral wool according to the invention is for its part characterized in that the mineral wool slabs in the bundle are selected from amongst mineral wool slabs having substantially the same initial thickness and initial density and in that of these selected slabs at least the slabs that are placed in the middle of the bundle before being packed with all the other slabs in the bundle have been precompressed flat to a predetermined degree with respect to their thickness and then decompressed to an intermediate thickness less than the initial thickness but greater than the thickness of the slab when it is in the precompressed state so that at the time of packing of the said wrapper they are of higher density and less thickness than the slabs that are placed outermost in the bundle, so that at the time of removal of the wrapping after storage and/or transport in the compressed state all the slabs in the bundle have reached essentially the same final thickness and final density.
  • all the slabs in the bundle except the outermost ones are precompressed and decompressed to a higher density before wrapping for storage in a compressed state.
  • the degree of precompression and thus also the density after said precompression and decompression is preferably substantially the same in all the inner slabs exposed to said precompression and decompression.
  • the device according to the invention which is suitable for carrying out the method of the invention includes at least one means for adjustable plane precompression and decompression of selected mineral wool slabs.
  • the means for precompression and decompression consists of a continuous plane press.
  • the said means for precompression and decompression is preferably also connected to or comprises in itself an instrument for measuring the necessary compression force in the form of the product's resistance to pressure ("wave function"). In this way continuous quality control with regard to pressure resistance is obtained.
  • the pressure resistance also says something about the instantaneous condition of the day and this information can be used for production line management.
  • the said means for precompression and decompression is preferably located between the formatting and stacking unit, e.g. in connection with the stacker.
  • Plane precompression in this document also referred to as " plane compression ", can be used for quality monitoring .
  • plane compression Before plane compression of slabs it is useful (a must) to take account of the treatment(s) that the slab has undergone before it reaches its final location where it insulates. Examples of such treatments are the packing, transport, transport duration and installation.
  • Feedback from the compression force says something about the product pressure resistance and can be used for production line adjustment settings such as density settings, structural changes, binder changes, curing efficiency and so on.
  • Feed forward from the compression force can be used to set the packing machines for milder/harder slab and package treatment with respect to the final insulation slab.
  • plane compression provides additional information for evaluation of what should have been done previously on the production line and what can be done after plane compression, with regard to the "day condition” and "instantaneous condition”.
  • a plane precompressor in this document also referred to as a "plane press”, can also be used for slabs other than low density products to be compressed in their packages.
  • hard/medium hard slab's pressure resistance can be continuously monitored and feedback to production line management can be given.
  • Figure 1 is a principle sketch of a continuous plane press intended to be used for precompression/decompression of insulation slabs 2 of mineral wool such as stone wool slabs.
  • the plane press can also be integrated with/in a slab stacker, whereby the method differs, several slabs can then e.g. be pressed simultaneously for different packages.
  • the plane press 1 is positioned following a formatting unit (not presented in the figure) where an already cured mineral wool mat with essentially consistent quality concerning dimensions and density is cut into equal sized pieces into mineral wool slabs 2 having substantially the same dimensions and density.
  • the slabs are transported further on a conveyor 3 until they arrive downstream of the formatting unit at the continuous plane press 1 with an adjustable degree of precompression (0-100%) (given as "adjustable precompression %" in Figure 1 ).
  • precompression of all mineral wool slabs 2 e.g. Paroc's UNS-R slabs
  • the slabs that will come outmost refers to at least the two outermost slabs, i.e. the very topmost and very undermost slab in a package.
  • the expression "the slabs that will come outermost” refers to more than two slabs, such as the top two and the lowest two and so on. As the number of slabs grows and/or the slabs are thinner, the number of outer slabs that do not need precompression/decompression increases.
  • the flat prepress can be programmed so that it for each slab 2" that passes through precompresses/pre-decompresses by being lowered to a predetermined compression degree and then raised to a non-compressing position so that the precompressed slab is decompressed (slab 2' is decompressed).
  • the conveyor belt 3 stops momentarily or the slabs 2 (and 2" and 2') move at constant speed on the production line's conveyor belt.
  • the plane press consists of an endless belt 4 with a flat part 5 which is intended to pre-compress specific slabs 2 against the conveyor belt 3 on which the slabs are transported forward to a stacker (not drawn in the figure). The endless belt 4 is then in the flat part 5 with the same speed and direction as the conveyor belt 3.
  • An individual package and/or transport unit can for example include eight mineral wool slabs of which the six innermost slabs are compressed and decompressed (slabs 2') to the same degree, e.g. with 20% compression, whereby the consistency of those slabs is changed so that they become thinner and also get a higher density than the slabs that are not subjected to compression/decompression (slabs 2 that in other words have 0% compression).
  • the compression/decompression treatment means that the structure the cured binder has formed in the mineral wool is changed ("broken") because some of the bonds break and some of the fibres break. With the plane compression/plane decompression method this means homogenization of the consistency that depending on the day condition varies and simultaneously the thickness of the slab is reduced, which should be considered.
  • the pre-press i.e. the plane compression machine can be programmed so that for example in this specific example, with eight slabs it automatically alternately does not compress two consecutive slabs and pre-compresses and decompresses six consecutive slabs to the same degree. Of the two not precompressed consecutive slabs the first slab will be the topmost slab in one package and the second slab will be the undermost slab in the following package.
  • the prepress is preferably also connected to or comprises in itself an instrument for measuring the necessary compression force ("wave function") (referred to as "measurement of the necessary force" in Figure 1 ). In this way continuous control of quality with respect to resistance to pressure is obtained.
  • a stacker Downstream of the prepress 1 a stacker (not drawn in the figure) is arranged where the desired number, e.g. eight, successive slabs are stacked on top of each other in a stack, which is then wrapped in a plastic wrapper the compressive effect of which holds together the eight slabs in a bundle where thus the uppermost and lowermost slabs are non-compressed.
  • the plastic packing can either be carried out with appropriate packing devices arranged directly in connection with the stacker or downstream of the stacker after transport on additional conveyor belts to the packing devices.
  • the package can be made by any techniques known to those skilled in the art.
  • the six innermost slabs 2' in the bundle (which in this example also as such constitutes the package and/or transport unit itself) are thinner and have a higher density than the two outmost slabs 2 in the bundle, i.e. the undermost and the topmost slab, so that the pack's all eight slabs at a later point in time when the wrapping is removed after storage and/or transportation have obtained essentially the same dimensions and density.
  • the six innermost slabs 2' are precompressed, that is plane compressed, but not the two outermost slabs 2.
  • the two outermost slabs as well as the other six slabs are squeezed after they are packed.
  • This squeezing or compression (i.e. compacting) of the packed two outermost slabs is less than the precompression, i.e. the plane compression of the inner slabs but continues over a longer period of time.
  • the inner slabs are thus squeezed or precompressed more for a short time before packing.
  • all eight slabs in the package and/or transport unit are compressed, but that at the time of removal of the wrapping after storage and/or transport they have substantially the same dimensions and density.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Basic Packing Technique (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Packages (AREA)
EP10173051.3A 2009-08-25 2010-08-17 Packing and/or transport unit for insulation slabs of mineral wool and method for manufacturing such Not-in-force EP2289807B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20095873A FI124460B (sv) 2009-08-25 2009-08-25 Förpackning och/eller transportenhet för isolerskivor av mineralull samt förfarande och anordning för tillverkning av sådana

Publications (3)

Publication Number Publication Date
EP2289807A2 EP2289807A2 (en) 2011-03-02
EP2289807A3 EP2289807A3 (en) 2013-10-09
EP2289807B1 true EP2289807B1 (en) 2014-12-31

Family

ID=41050698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10173051.3A Not-in-force EP2289807B1 (en) 2009-08-25 2010-08-17 Packing and/or transport unit for insulation slabs of mineral wool and method for manufacturing such

Country Status (3)

Country Link
EP (1) EP2289807B1 (sv)
DK (1) DK2289807T3 (sv)
FI (1) FI124460B (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015112142A1 (de) * 2015-07-24 2017-01-26 Saint-Gobain Isover G+H Ag Verfahren zum Vorbereiten einer Dämmstoffbahn für den Transport und Vorrichtung zum Durchführen des Verfahrens

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE455859B (sv) * 1982-08-26 1988-08-15 Olov Erland Gustavsson Sett och apparat for att forpacka elastiskt komprimerbara material
DE10392088D2 (de) * 2002-04-30 2005-06-09 Rockwool Mineralwolle Verfahren zur Herstellung einer Verpackungseinheit und Vorrichtung zur Durchführung des Verfahrens
FI20085034L (sv) * 2008-01-16 2009-07-17 Paroc Oy Ab Förfarande och anordning för förpackning av hoppressade eller icke-hoppressade skivformade mineralullsprodukter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015112142A1 (de) * 2015-07-24 2017-01-26 Saint-Gobain Isover G+H Ag Verfahren zum Vorbereiten einer Dämmstoffbahn für den Transport und Vorrichtung zum Durchführen des Verfahrens

Also Published As

Publication number Publication date
EP2289807A2 (en) 2011-03-02
FI20095873A (sv) 2011-02-26
EP2289807A3 (en) 2013-10-09
DK2289807T3 (en) 2015-04-13
FI20095873A0 (sv) 2009-08-25
FI124460B (sv) 2014-09-15

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