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EP2576168B1 - Conveyor and method for the manufacture of gypsum plaster board - Google Patents

Conveyor and method for the manufacture of gypsum plaster board Download PDF

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Publication number
EP2576168B1
EP2576168B1 EP11723946.7A EP11723946A EP2576168B1 EP 2576168 B1 EP2576168 B1 EP 2576168B1 EP 11723946 A EP11723946 A EP 11723946A EP 2576168 B1 EP2576168 B1 EP 2576168B1
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EP
European Patent Office
Prior art keywords
conveyor belt
ditches
belt according
conveyor
gypsum
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EP11723946.7A
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German (de)
French (fr)
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EP2576168A1 (en
Inventor
Thomas Krämer
Jürgen MARTIN
Grzegorz Klon
Artur Kropielnicki
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Knauf Gips KG
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Knauf Gips KG
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Priority to EP11723946.7A priority Critical patent/EP2576168B1/en
Priority to PL11723946T priority patent/PL2576168T3/en
Publication of EP2576168A1 publication Critical patent/EP2576168A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B28B19/0092—Machines or methods for applying the material to surfaces to form a permanent layer thereon to webs, sheets or the like, e.g. of paper, cardboard

Definitions

  • the present invention relates to a conveyor belt and its use.
  • Conveyor belts are usually stationary systems which belong to the continuous conveyors. They are used in many forms for a wide variety of applications, for example in opencast mining, in industrial production or at supermarket cash registers. They are used both for the transport of general cargo and for the transport of bulk goods.
  • conveyor belts consist of a carcass of textile or steel inserts, which transmit the tensile forces. This carcass is surrounded by one or more cover or wear layers which may be of different materials (e.g., rubber, rubber compounds, modified PVC blends).
  • CA 2,363,480 relates to a conveyor belt for transporting particles such as coal, pieces of wood or cereal grains, in which a slipping back during a region in which the conveyor belt is increasing, to be prevented.
  • EP 1 925 576 relates to a conveyor belt for curved belt applications in which a conveyor belt is guided in a curve.
  • the transport product undergoes a chemical or physical change process during transport, for example by drying, curing, setting, shaping, surface structuring, etc.
  • the slab strand consists of a face cardboard and a cardboard backing with a trapped, liquid, still malleable and settable gypsum core between the two boxes.
  • the gypsum core exotherms exothermally.
  • the plate strand heats up to 10K during this setting process.
  • the slab strand is subject to length and width expansion. First portions of the excess water added in the gypsum slurry production process are released to the environment via the already moist cardboard surface.
  • the visible side board forms during the transport process the Plattenrohstrangunterseite and thus the contact surface to the forming belt.
  • the relative movement between Rohplattenstrang and Formgurt must be recorded without adversely affecting the gypsum board surface.
  • volume is required for portions of the excess water condensing on the belt.
  • the driving side panel is necessary due to the very high product requirements of the market for the finished panel side view surface.
  • the gypsum board surface must be level, without dents and undulations, without grooves or other mechanical deformations and damages.
  • a realization of the requirements can be achieved in production only by a manufactured and used with special requirements for the belt surface form band.
  • Object of the present invention was to find ways to improve the surface structure of Abbindeb Sn / mold bands, and thus to allow a more reliable, more economical production of the straps and the gypsum boards.
  • the claimed claimed structure causes the conveyor belt promotes the Plattenstrangober vomformung positive.
  • the formation of the plasterboard by the surface is the relevant property of the conveyor belt, while the actual transport function is practically irrelevant. It is believed that the wells dissipate and diffuse the water leaving the plasterboard during the setting process and distribute it on the conveyor belt surface to reduce the adhesive forces between the carton and the conveyor belt surface. This results in certain flexibility with regard to the expansion of the board web and the entire gypsum matrix strand.
  • the volume of the wells is just chosen so that the liquid can be removed, on the other hand, the recess but not so large that the structures can not support the plate in a plane.
  • the parameters of claim 1 have proven to be a suitable description. It is particularly important that the wells are networked together, so that liquid can be removed.
  • the Dränage Angel plays an essential role in the operation of the transport and Abbindebandes invention.
  • the conveyor belt according to the invention has a support surface for the product, this page is also referred to as the support side. Within the support surface, there are one or more structural regions having recesses. This structural area has depressions. These pits form a network on the surface, i. H. Wells are connected to other wells.
  • a structural area is an area on the conveyor belt of at least 20 * 20 cm.
  • the depressions preferably have widths of max. 1.5 mm. There may be individual wider depressions, with at least 90% of the well being no wider than 1.5 mm.
  • the width of a pit is measured by measuring the smallest distance between two edge areas of the pit.
  • the wells should not be too deep either.
  • the recesses are in the range of 0.1 to 2 mm. At least 90% of wells should not exceed this range; H. lie lower.
  • the widths and depths are maintained in at least one structural area.
  • each structural region has no depressions.
  • An indentation occurs when the material is abruptly (discontinuously) lowered by a height of at least 0.1 mm in relation to the adjacent regions. Lower height differences do not form a depression.
  • the volume of the depression based on an area of 1 cm 2 , should be between 10 and 80 mm 3 .
  • the parameters can be measured as follows:
  • a sample of a conveyor belt is cut to an exact size of 10 * 10 cm and determined by measuring the thickness at least 10 points evenly distributed over the surface with a manual thickness gauge 50/5 with a 30mm dish.
  • the blank edges of the conveyor belt are sealed against ingress of water.
  • the theoretical volume of the surface-plane conveyor belt is calculated from the mean value determined over the 10 thickness measured values and the base area.
  • the sample is immersed in a vessel with water and measured by the buoyancy reduced weight. From the difference between the weight in the dry state and the weight in water, the actual volume of the body can be determined. The measured volume minus the actual volume gives the volume of the sum of the wells of the sample.
  • a sample of the conveyor belt to be examined is placed evenly with the structured surface facing upwards on a base.
  • a crack width meter rack width ruler
  • a crack magnifying glass with integrated scale the width of the recess is manually determined optically.
  • a sample of the conveyor belt to be examined is placed evenly with the structured surface facing upwards on a base.
  • a digital profile thickness gauge with a sensor head adapted in thickness, the depths of the depressions are measured manually.
  • the recesses are regularly formed, for example in the form of square structures. However, it is preferred that the depressions run irregularly, it being possible to use both irregular structures-for example zigzag courses, curves, etc.-as well as a completely irregular-for example stochastic structure-can be used.
  • the recesses may extend parallel to the direction of the conveyor belt, but they can also be transverse or at any other angles to the direction of the conveyor belt. For the wells to form a network, it is necessary that they do not all run parallel to each other. Recesses can be formed at right angles, but also with shallower or more acute angles to each other. In particular, curves can also be used instead of sharp angles.
  • the depressions themselves can run in a straight line, but they can not run in a straight line in a depression, but form curves, etc. and change in the course depth and width.
  • the invention further relates to the use of the conveyor belt according to the invention for transporting a plasterboard during a setting process.
  • the setting process is the setting of a gypsum matrix.
  • Corresponding structured areas can be attached to conveyor belts in a variety of ways. It is possible to use blades to rupture the surface, emboss the surface with embossing rollers, or use UV radiation and temperature to age the material and then break it. Further variants are shock freezing of the surface with liquid nitrogen and breaking of the surface by mechanical stress and combinations thereof.
  • Suitable materials for the support surface are in particular natural and synthetic rubbers, but also various polymers such. also modified PVC.
  • Such conveyor belts may have fabric structures inside, but these are then covered with a cover / wear layer.
  • a conveyor belt was subjected to UV and cold / heat treatment.
  • the surface is in FIG. 2 shown.
  • the plasterboard produced on this tape had a particularly uniform and smooth visible side.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Belt Conveyors (AREA)

Description

Die vorliegende Erfindung betrifft ein Transportband und seine Verwendung.The present invention relates to a conveyor belt and its use.

Förderbänder sind meist stationäre Anlagen, die zu den Stetigförderern gehören. Sie sind in zahlreichen Formen für verschiedenste Anwendung im Einsatz, beispielsweise im Tagebau, in der Industrieproduktion oder an Supermarktkassen. Sie werden sowohl zum Befördern von Stückgut als auch zum Befördern von Schüttgütern verwendet.Conveyor belts are usually stationary systems which belong to the continuous conveyors. They are used in many forms for a wide variety of applications, for example in opencast mining, in industrial production or at supermarket cash registers. They are used both for the transport of general cargo and for the transport of bulk goods.

Ein wesentlicher Bestandteil eines Förderbandes ist der Fördergurt bzw. das Transportband. Typischerweise bestehen Transportbänder aus einer Karkasse aus Textil- oder Stahleinlagen, die die Zugkräfte übertragen. Diese Karkasse ist von einer oder mehreren Deck- oder Verschleißschichten umgeben, welche aus unterschiedlichen Materialien bestehen können (z.B. Gummi, Gummimischungen, modifizierte PVC-Mischungen)An essential component of a conveyor belt is the conveyor belt or the conveyor belt. Typically, conveyor belts consist of a carcass of textile or steel inserts, which transmit the tensile forces. This carcass is surrounded by one or more cover or wear layers which may be of different materials (e.g., rubber, rubber compounds, modified PVC blends).

Transportbänder für verschiedenste Anwendungen sind dem Fachmann bekannt.Conveyor belts for a wide variety of applications are known in the art.

CA 2,363,480 betrifft ein Transportband zum Transport von Partikeln wie Kohle, Holzstücken oder Getreidekörnern, bei denen ein Zurückrutschen während eines Bereichs, in dem das Transportband ansteigt, verhindert werden soll. CA 2,363,480 relates to a conveyor belt for transporting particles such as coal, pieces of wood or cereal grains, in which a slipping back during a region in which the conveyor belt is increasing, to be prevented.

EP 1 925 576 betrifft ein Förderband für Kurvenbandanwendungen, bei denen ein Transportband in einer Kurve geführt wird. EP 1 925 576 relates to a conveyor belt for curved belt applications in which a conveyor belt is guided in a curve.

In einigen speziellen Fällen des Einsatzes von Förderbändern durchläuft das Förderprodukt während des Transports einen chemischen oder physikalischen Veränderungsprozess, beispielsweise durch Trocknung, Aushärtung, Abbinden, Formung, Oberffächenstrukturierung, etc.In some specific cases of the use of conveyor belts, the transport product undergoes a chemical or physical change process during transport, for example by drying, curing, setting, shaping, surface structuring, etc.

Ein Beispiel für solch einen Prozess stellt die Herstellung von Gipskartonplatten dar. Das grundsätzliche Prinzip der Herstellung von Gipskartonplatten ist beispielsweise in der US 2006/0029785 A1 beschrieben. Zum Einsatz kommen in der Gipsplatten herstellenden Industrie spezielle Transportbänder, so genannte Abbindebänder oder auch Formbänder genannt. Diese Formbänder befinden sich im technologischen Ablauf der Gipsplattenherstellung unmittelbar nach der Extrusion des noch feuchten und formbaren, unendlichen Gipsplattenstranges (nachfolgend Plattenrohstrang genannt), d.h. am Beginn der so genannten Abbindestrecke (Figur 1).An example of such a process is the production of plasterboard. The basic principle of the production of plasterboard is, for example, in US 2006/0029785 A1 described. In the gypsum plasterboard industry special conveyor belts are used, so-called Abbindebänder or called form bands. These forming belts are in the technological process of gypsum board production immediately after the extrusion of the still moist and moldable, infinite gypsum board strand (hereinafter referred to as Plattenrohstrang), ie at the beginning of the so-called Abbindestrecke ( FIG. 1 ).

Der Plattenrohstrang besteht aus einem Sichtseitenkarton und einem Rückseitenkarton mit einem zwischen den beiden Kartons eingeschlagenen, eingeschlossenen, flüssigen und noch formbaren und abbindefähigen Gipskern. Während des Transportes des Plattenrohstranges auf dem Abbindegurt bindet der Gipskern exotherm ab. Der Plattenstrang erwärmt sich während dieses Abbindeprozesses um bis zu 10K. Verbunden damit unterliegt der Plattenrohstrang einer Längen- und Breitenexpansion. Erste Anteile des im Gipsbreiherstellungsprozesses hinzugegebenen Überschusswassers werden über die jetzt bereits feuchte Kartonoberfläche an die Umgebung abgegeben.The slab strand consists of a face cardboard and a cardboard backing with a trapped, liquid, still malleable and settable gypsum core between the two boxes. During transport of the slab strand on the binding belt, the gypsum core exotherms exothermally. The plate strand heats up to 10K during this setting process. Connected with this, the slab strand is subject to length and width expansion. First portions of the excess water added in the gypsum slurry production process are released to the environment via the already moist cardboard surface.

Der Sichtseitenkarton bildet während des Transportprozesses die Plattenrohstrangunterseite und somit die Kontaktfläche zum Formband. Hier an der Kontaktfläche muss die Relativbewegung zwischen Rohplattenstrang und Formgurt ohne negative Beeinflussung der Gipsplattenoberfläche aufgenommen werden. Des Weiteren wird Volumen für Anteile des am Gurt kondensierenden Überschusswassers benötigt.The visible side board forms during the transport process the Plattenrohstrangunterseite and thus the contact surface to the forming belt. Here at the contact surface, the relative movement between Rohplattenstrang and Formgurt must be recorded without adversely affecting the gypsum board surface. Furthermore, volume is required for portions of the excess water condensing on the belt.

Verfahrenstechnisch ist die Fahrweise Sichtseitenkarton nach unten, auf Grund der sehr hohen Produktanforderungen des Marktes an die Fertigplattensichtseitenoberfläche, notwendig. Die Gipsplattenoberfläche muss eben, ohne Dellen und Wellen, ohne Rillen oder sonstige mechanische Deformationen und Beschädigungen beschaffen sein. Eine Realisierung der Anforderungen kann in der Produktion nur durch ein mit besonderen Anforderungen an die Gurtoberfläche hergestelltes und eingesetztes Formband erzielt werden.From a process engineering point of view, the driving side panel is necessary due to the very high product requirements of the market for the finished panel side view surface. The gypsum board surface must be level, without dents and undulations, without grooves or other mechanical deformations and damages. A realization of the requirements can be achieved in production only by a manufactured and used with special requirements for the belt surface form band.

Als Stand der Technik werden von den verschiedenen weltweit tätigen Abbindeband- / Formbandherstellern Transportgurte mit glatten und unstrukturierten Oberflächen mit sehr engen Toleranzen bezüglich Ebenheit, Oberflächenglätte, Dickentoleranzen über die Gurtbreite und komplette Gurtlänge hergestellt. Je nach eingesetzten Gurtmaterialien (Naturgummi, SBR Gummi, PVC, etc.) ergeben sich Gurte mit sehr starken Variationen der oben genannten Parameter, welche im Gipsplattenproduktionsprozess zu ungenügenden Qualitätsparametern bei der Oberflächenbeschaffenheit der Gipsplatten führen.As a state of the art, conveyor belting with smooth and unstructured surfaces with very close tolerances with regard to evenness, surface smoothness, Thickness tolerances over the belt width and complete belt length produced. Depending on the belt materials used (natural rubber, SBR rubber, PVC, etc.), straps with very strong variations of the above mentioned parameters result, which in the gypsum board production process lead to insufficient quality parameters in the surface quality of the gypsum boards.

Für alle bisher herstell- und lieferbaren Abbindegurte ist nach der Installation auf der Produktionslinie eine mehrwöchige Einfahr- und Nachbehandlungsphase essentiell.After installation on the production line, a retraction and aftertreatment phase lasting several weeks is essential for all previously produced and deliverable fastening straps.

Aufgabe der vorliegenden Erfindung war es, Möglichkeiten zur Verbesserung der Oberflächenstruktur von Abbindebändern / Formbändern zu finden, und damit eine zuverlässigere, wirtschaftlichere Fertigung der Gurte als auch der Gipsplatten zu ermöglichen.Object of the present invention was to find ways to improve the surface structure of Abbindebändern / mold bands, and thus to allow a more reliable, more economical production of the straps and the gypsum boards.

Gelöst wird die Aufgabe durch die Bereitstellung eines Transport- und Formbandes für Gipskartonplatten mit einer Auflagefläche zum Produkttransport und mindestens einem Strukturbereich innerhalb der Auflagefläche, wobei der mindestens eine Strukturbereich Vertiefungen aufweist, wobei

  • die Vertiefungen ein Netzwerk bilden
  • mindestens 60% jedes Strukturbereichs keine Vertiefungen aufweisen
  • das Volumen der Vertiefungen bezogen auf eine Grundfläche von 1 cm2 im Bereich von 10 bis 80 mm3 liegt.
The object is achieved by providing a transport and forming belt for plasterboard with a support surface for product transport and at least one structure area within the support surface, wherein the at least one structural region has recesses, wherein
  • the wells form a network
  • at least 60% of each structural area has no depressions
  • the volume of the recesses based on a base area of 1 cm 2 in the range of 10 to 80 mm 3 .

Während im Stand der Technik versucht wurde, für den Transport von Gipskartonplatten während des Abbindens möglichst glatte und planebene Transportgurte einzusetzen, um eine glatte und planebene Oberfläche zu erhalten, zeigt sich, dass die erfindungsgemäß eingesetzten strukturierten Transportbänder zu Gipskartonplatten mit verbesserter Oberflächenqualität führen.While attempts have been made in the prior art to use as smooth and flat conveyor belts as possible for the transport of plasterboard during setting in order to obtain a smooth and flat surface, it is found that the structured conveyor belts used according to the invention lead to plasterboard with improved surface quality.

Die erfindungsgemäß beanspruchte Struktur führt dazu, dass das Transportband die Plattenstrangoberflächenformung positiv fördert. Die Formung der Gipskartonplatte durch die Oberfläche ist die relevante Eigenschaft des Transportbandes, während die eigentliche Transportfunktion praktisch nebensächlich ist. Es wird davon ausgegangen, dass die Vertiefungen das während des Abbindeprozesses aus der Gipskartonplatte austretende und kondensierende Wasser so abführen und auf der Transportbandoberfläche verteilen, dass die Adhäsionskräfte zwischen Karton und Transportbandoberfläche reduziert werden. Daraus ergeben sich gewisse Flexibilitäten hinsichtlich der Ausdehnung der Kartonbahn und des gesamten Gipsmatrix-Stranges.The claimed claimed structure causes the conveyor belt promotes the Plattenstrangoberflächenformung positive. The formation of the plasterboard by the surface is the relevant property of the conveyor belt, while the actual transport function is practically irrelevant. It is believed that the wells dissipate and diffuse the water leaving the plasterboard during the setting process and distribute it on the conveyor belt surface to reduce the adhesive forces between the carton and the conveyor belt surface. This results in certain flexibility with regard to the expansion of the board web and the entire gypsum matrix strand.

Dabei ist es wichtig, dass das Volumen der Vertiefungen gerade so gewählt wird, dass die Flüssigkeit abgeführt werden kann, auf der anderen Seite die Vertiefung aber nicht so groß werden, dass die Strukturen die Platte nicht mehr in einer Ebene tragen können.It is important that the volume of the wells is just chosen so that the liquid can be removed, on the other hand, the recess but not so large that the structures can not support the plate in a plane.

Hierzu haben sich die Parameter des Anspruchs 1 als eine geeignete Beschreibung erwiesen. Wichtig erscheint insbesondere, dass die Vertiefungen miteinander vernetzt sind, sodass Flüssigkeit abgeführt werden kann. Die Dränagewirkung spielt eine wesentliche Rolle bei der Wirkungsweise des erfindungsgemäßen Transport- und Abbindebandes.For this purpose, the parameters of claim 1 have proven to be a suitable description. It is particularly important that the wells are networked together, so that liquid can be removed. The Dränagewirkung plays an essential role in the operation of the transport and Abbindebandes invention.

Das erfindungsgemäße Transportband hat eine Auflagefläche für das Produkt, diese Seite wird auch als Tragseite bezeichnet. Innerhalb der Auflagefläche gibt es einen oder mehrere Strukturbereiche, die Vertiefungen aufweisen. Dieser Strukturbereich weist Vertiefungen auf. Diese Vertiefungen bilden ein Netzwerk auf der Oberfläche, d. h. Vertiefungen sind mit anderen Vertiefungen verbunden.The conveyor belt according to the invention has a support surface for the product, this page is also referred to as the support side. Within the support surface, there are one or more structural regions having recesses. This structural area has depressions. These pits form a network on the surface, i. H. Wells are connected to other wells.

Ein Strukturbereich ist eine Fläche auf dem Transportband von mindestens 20 * 20 cm.A structural area is an area on the conveyor belt of at least 20 * 20 cm.

Die Vertiefungen weisen bevorzugt Breiten von max. 1,5 mm auf. Es können einzelne breitere Vertiefungen vorhanden sein, wobei zumindest 90% der Vertiefung nicht breiter als 1,5 mm sind. Die Breite einer Vertiefung wird gemessen, indem die geringste Entfernung zwischen zwei Randbereichen der Vertiefung gemessen wird.The depressions preferably have widths of max. 1.5 mm. There may be individual wider depressions, with at least 90% of the well being no wider than 1.5 mm. The width of a pit is measured by measuring the smallest distance between two edge areas of the pit.

Die Vertiefungen dürfen auch nicht zu tief sein. Bevorzugt liegen die Vertiefungen im Bereich von 0,1 bis 2 mm. Zumindest 90 % der Vertiefungen sollten diesen Bereich nicht überschreiten, d. h. tiefer liegen.The wells should not be too deep either. Preferably, the recesses are in the range of 0.1 to 2 mm. At least 90% of wells should not exceed this range; H. lie lower.

Bevorzugt werden die Breiten und Tiefen in mindestens einem Strukturbereich eingehalten.Preferably, the widths and depths are maintained in at least one structural area.

Eine weitere Eigenschaft ist, dass mindestens 60% jedes Strukturbereichs keine Vertiefungen aufweisen. Eine Vertiefung liegt vor, wenn gegenüber den benachbarten Bereichen das Material sprungartig (unstetig) um eine Höhe von mindestens 0,1 mm abgesenkt ist. Geringere Höhenunterschiede bilden keine Vertiefung.Another characteristic is that at least 60% of each structural region has no depressions. An indentation occurs when the material is abruptly (discontinuously) lowered by a height of at least 0.1 mm in relation to the adjacent regions. Lower height differences do not form a depression.

Zusätzlich sollte das Volumen der Vertiefung, bezogen auf eine Fläche von 1 cm2, zwischen 10 und 80 mm3 liegen.In addition, the volume of the depression, based on an area of 1 cm 2 , should be between 10 and 80 mm 3 .

Die Parameter können wie folgt gemessen werden:The parameters can be measured as follows:

Messung des VolumensMeasurement of the volume

Eine Probe eines Transportbandes wird in eine exakte Größe von 10*10 cm geschnitten und durch Messung der Dicke an mindestens 10, über die Fläche gleichmäßig verteilten Stellen mit einem manuellen Dickenmessgerät 50/5 mit einem 30mm-Teller bestimmt. Die Zuschnittkanten des Transportbandes werden gegen Wassereintritt versiegelt. Aus dem über die 10 Dickenmesswerte bestimmten Mittelwert und die Grundfläche wird das theoretische Volumen des Oberflächenebenentransportbandes berechnet. Anschließend wird die Probe in ein Gefäß mit Wasser getaucht und das durch den Auftrieb verminderte Gewicht gemessen. Aus der Differenz zwischen dem Gewicht im trockenen Zustand und dem Gewicht in Wasser, kann das tatsächliche Volumen des Körpers bestimmt werden. Das gemessene Volumen abzüglich des tatsächlichen Volumens ergibt das Volumen der Summe der Vertiefungen der Probe.A sample of a conveyor belt is cut to an exact size of 10 * 10 cm and determined by measuring the thickness at least 10 points evenly distributed over the surface with a manual thickness gauge 50/5 with a 30mm dish. The blank edges of the conveyor belt are sealed against ingress of water. The theoretical volume of the surface-plane conveyor belt is calculated from the mean value determined over the 10 thickness measured values and the base area. Subsequently, the sample is immersed in a vessel with water and measured by the buoyancy reduced weight. From the difference between the weight in the dry state and the weight in water, the actual volume of the body can be determined. The measured volume minus the actual volume gives the volume of the sum of the wells of the sample.

Messung der Breite einer VertiefungMeasurement of the width of a depression

Eine Probe des zu untersuchenden Transportbandes wird planeben mit der strukturierten Fläche nach oben auf eine Unterlage gelegt. Mit Hilfe eines Rissbreitenmesseres (Rissbreitenlineals) oder einer Risslupe mit integrierter Skala wird die Breite der Vertiefung manuell optisch bestimmt.A sample of the conveyor belt to be examined is placed evenly with the structured surface facing upwards on a base. With the help of a crack width meter (crack width ruler) or a crack magnifying glass with integrated scale, the width of the recess is manually determined optically.

Messung der Tiefe einer VertiefungMeasurement of the depth of a depression

Eine Probe des zu untersuchenden Transportbandes wird planeben mit der strukturierten Fläche nach oben auf eine Unterlage gelegt. Mittels eines digitalen Profildickenmessgeräts mit einem in der Dicke angepassten Fühlerkopf werden die Tiefen der Vertiefungen manuell vermessen.A sample of the conveyor belt to be examined is placed evenly with the structured surface facing upwards on a base. By means of a digital profile thickness gauge with a sensor head adapted in thickness, the depths of the depressions are measured manually.

Überraschenderweise zeigt sich, dass solche strukturierten Oberflächen des Transportbandes zu besseren Oberflächeneigenschaften der darauf hergestellten Gipskartonplatten führen und/oder lange Einfahrphasen der Bänder reduziert oder vermieden werden können.Surprisingly, it has been found that such structured surfaces of the conveyor belt lead to better surface properties of the gypsum plasterboard produced thereon and / or long drive-in phases of the belts can be reduced or avoided.

Es ist möglich, dass die Vertiefungen regelmäßig ausgebildet sind, beispielsweise in Form von quadratischen Strukturen. Es wird aber bevorzugt, dass die Vertiefungen unregelmäßig verlaufen, wobei sowohl unregelmäßige Strukturen - beispielsweise Zick-Zack-Verläufe, Rundungen, etc. - eingesetzt werden können, als auch eine völlig unregelmäßige - beispielsweise stochastische Struktur - zum Einsatz kommen kann. Die Vertiefungen können parallel zur Laufrichtung des Transportbandes verlaufen, sie können aber auch quer verlaufen oder in beliebigen sonstigen Winkeln zur Laufrichtung des Transportbandes. Damit die Vertiefungen ein Netzwerk bilden können, ist es notwendig, dass sie nicht alle parallel zueinander verlaufen. Vertiefungen können rechtwinklig, aber auch mit flacheren oder spitzeren Winkeln zueinander ausgebildet sein. Insbesondere können auch statt scharfer Winkel Rundungen zum Einsatz kommen. Die Vertiefungen selbst können gradlinig verlaufen, sie können aber auch innerhalb einer Vertiefung nicht gradlinig verlaufen, sondern Rundungen etc. bilden und im Verlauf Tiefe und Breite ändern.It is possible that the recesses are regularly formed, for example in the form of square structures. However, it is preferred that the depressions run irregularly, it being possible to use both irregular structures-for example zigzag courses, curves, etc.-as well as a completely irregular-for example stochastic structure-can be used. The recesses may extend parallel to the direction of the conveyor belt, but they can also be transverse or at any other angles to the direction of the conveyor belt. For the wells to form a network, it is necessary that they do not all run parallel to each other. Recesses can be formed at right angles, but also with shallower or more acute angles to each other. In particular, curves can also be used instead of sharp angles. The depressions themselves can run in a straight line, but they can not run in a straight line in a depression, but form curves, etc. and change in the course depth and width.

Bevorzugt ist der Strukturbereich außerhalb der Bereiche der Vertiefung plan eben, d.h. die nicht vertieften Bereiche weisen eine möglichst gut übereinstimmende Höhe auf.

  • Figur 1 zeigt schematisch einen Ablauf aus der Gipsplattenherstellung am Beginn des Rohplattenformstranges. Erkennbar wird die Zuführung des Sichtseitenkartons (2) und des Rückseitenkartons (1), Zuführung des Gipsbreis aus dem Hauptmischer (3) und Formung des Rohplattenstranges (5) im Extruder (4) mit nachfolgender Formung auf dem Transport- und Formband (6).
  • Figur 2 zeigt ein Oberflächenband gemäß Beispiel.
The structural region outside the regions of the depression is preferably flat, ie the non-recessed regions have a height that matches as closely as possible.
  • FIG. 1 schematically shows a process from the gypsum board production at the beginning of Rohplattenformstranges. Visible is the supply of the visible side carton (2) and the backside carton (1), feeding the gypsum slurry from the main mixer (3) and forming the raw plate strand (5) in the extruder (4) with subsequent shaping on the transport and forming belt (6).
  • FIG. 2 shows a surface tape according to example.

Gegenstand der Erfindung ist weiterhin die Verwendung des erfindungsgemäßen Transportbandes zum Transport einer Gipskartonplatte während eines Abbindeprozesses. Der Abbindeprozess ist das Abbinden einer Gipsmatrix.The invention further relates to the use of the conveyor belt according to the invention for transporting a plasterboard during a setting process. The setting process is the setting of a gypsum matrix.

Gegenstand der Erfindung ist auch ein Verfahren zur Herstellung einer Gipskartonplatte, umfassend folgende Schritte:

  • Bereitstellen einer abbindefähigen Gipsmatrix
  • Auftragen der Gipsmatrix auf eine erste Kartonbahn
  • Abdecken der Gipsmatrix mit einer zweiten Kartonbahn, wodurch eine Gipskartonbahn gebildet wird
  • Abbinden und Formung der Gipsmatrix auf dem erfindungsgemäßen Transport- und Formband
  • Schneiden der zumindest teilweise abgebunden Gipskartonbahn.
The invention also provides a process for producing a plasterboard comprising the following steps:
  • Provision of a settable gypsum matrix
  • Apply the plaster matrix to a first board web
  • Covering the gypsum matrix with a second board web, whereby a gypsum board is formed
  • Setting and shaping of the gypsum matrix on the transport and forming belt according to the invention
  • Cutting the at least partially tied gypsum plasterboard.

Entsprechende strukturierte Bereiche lassen sich auf Transportbändern in vielfältiger Weise anbringen. Möglich ist die Verwendung von Klingen, um die Oberfläche aufzureißen, das Prägen der Oberfläche mit Prägerollen oder die Verwendung von UV-Strahlung und Temperatur, um das Material zu altern und es anschließend zu brechen. Weitere Varianten sind Schockfrieren der Oberfläche mit flüssigem Stickstoff und Brechen der Oberfläche durch mechanische Belastung und Kombinationen davon.Corresponding structured areas can be attached to conveyor belts in a variety of ways. It is possible to use blades to rupture the surface, emboss the surface with embossing rollers, or use UV radiation and temperature to age the material and then break it. Further variants are shock freezing of the surface with liquid nitrogen and breaking of the surface by mechanical stress and combinations thereof.

Als Material für die Auflagefläche eignen sich insbesondere natürliche und synthetische Kautschuke, aber auch verschiedenste Polymere wie z.B. auch modifizierter PVC. Solche Transportbänder können im Inneren Gewebestrukturen aufweisen, diese sind dann jedoch mit einer Deck-/Verschleißschicht abgedeckt.Suitable materials for the support surface are in particular natural and synthetic rubbers, but also various polymers such. also modified PVC. Such conveyor belts may have fabric structures inside, but these are then covered with a cover / wear layer.

Die Erfindung wird durch das nachfolgende Beispiel näher erläutert:The invention is explained in more detail by the following example:

Beispielexample

Ein Transportband wurde einer UV- und Kälte/Wärmebehandlung unterzogen. Die Oberfläche ist in Figur 2 dargestellt.A conveyor belt was subjected to UV and cold / heat treatment. The surface is in FIG. 2 shown.

Bestimmung des VolumensDetermination of the volume

Ein Probenstück mit den Maßen 10*10cm wurde vermessen. Es hatte eine Stärke von 1,4 cm, sodass sich rechnerisch ein Volumen von 140 cm3 ergab. An einer Federwage wurde das Gewicht mit 177 g bestimmt. Bei Normalbedingungen (20°C, Dichte (Wasser)=0,9982 g/cm3) ergab sich beim Einhängen der Probe in ein Becherglas mit Wasser eine Gewichtsanzeige von 40 g, sodass das tatsächliche Volumen des Probenkörpers nur 137 cm3 beträgt. Daraus folgt, dass die Vertiefung ein zusätzliches Volumen von 3 cm3 bzw. 3000 mm3 hat. Bezogen auf eine Fläche von 1 cm2 ergibt dies ein Volumen der Vertiefung von 30mm3.A test piece measuring 10 * 10cm was measured. It had a thickness of 1.4 cm, so that mathematically a volume of 140 cm 3 resulted. On a spring carriage, the weight was determined at 177 g. Under normal conditions (20 ° C, density (water) = 0.9982 g / cm 3 ), when the sample was placed in a beaker with water, a weight reading of 40 g was obtained, so that the actual volume of the sample was only 137 cm 3 . It follows that the depression has an additional volume of 3 cm 3 or 3000 mm 3 . Based on an area of 1 cm 2 , this results in a volume of the recess of 30 mm 3 .

Die auf diesem Band hergestellte Gipskartonplatte hatte eine besonders gleichmäßige und glatte Sichtseite.The plasterboard produced on this tape had a particularly uniform and smooth visible side.

Claims (13)

  1. Conveyor and shaping belt for gypsum plasterboards, comprising a supporting surface for product conveying and at least one structural area within the supporting surface, wherein said at least one structural area has ditches, wherein
    - the ditches form a network;
    - at least 60% of each structural area have no ditches;
    - the volume of the ditches, based on a reference area of 1 cm2, is within a range of from 10 to 80 mm3.
  2. The conveyor belt according to claim 1, wherein then width of said ditches is at most 1.5 mm.
  3. The conveyor belt according to claim 1 or 2, wherein the depth of said ditches is within a range of from 0.1 to 2 mm.
  4. The conveyor belt according to any of claims 1 to 3, characterized in that said ditches have a regular design.
  5. The conveyor belt according to any of claims 1 to 3, characterized in that said ditches have an irregular design.
  6. The conveyor belt according to any of claims 1 to 5, characterized in that said ditches run parallel to the direction of travel of the conveyor belt.
  7. The conveyor belt according to any of claims 1 to 5, characterized in that said ditches do not run parallel to the direction of travel of the conveyor belt, in particular, they run transverse to the direction of travel of the conveyor belt.
  8. The conveyor belt according to any of claims 1 to 7, characterized in that said ditches run in a straight line.
  9. The conveyor belt according to any of claims 1 to 7, characterized in that said ditches do not run in a straight line.
  10. The conveyor belt according to any of claims 1 to 9, characterized in that said structural area is planar except for the ditches.
  11. Use of a conveyor and shaping belt according to any of claims 1 to 10 for conveying a plasterboard raw sheet during the setting process.
  12. The use according to claim 11 for shaping the surface of a plasterboard raw sheet.
  13. A process for preparing a gypsum plasterboard, comprising the following steps:
    - providing a settable gypsum matrix;
    - applying the gypsum matrix to a first cardboard sheet;
    - covering the gypsum matrix with a second cardboard sheet to form a plasterboard sheet;
    - setting the gypsum matrix on a conveyor and shaping belt according to any of claims 1 to 10;
    - cutting the at least partially set plasterboard sheet.
EP11723946.7A 2010-06-04 2011-06-01 Conveyor and method for the manufacture of gypsum plaster board Active EP2576168B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11723946.7A EP2576168B1 (en) 2010-06-04 2011-06-01 Conveyor and method for the manufacture of gypsum plaster board
PL11723946T PL2576168T3 (en) 2010-06-04 2011-06-01 Conveyor and method for the manufacture of gypsum plaster board

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10164998 2010-06-04
EP11723946.7A EP2576168B1 (en) 2010-06-04 2011-06-01 Conveyor and method for the manufacture of gypsum plaster board
PCT/EP2011/059118 WO2011151401A1 (en) 2010-06-04 2011-06-01 Transporting belt

Publications (2)

Publication Number Publication Date
EP2576168A1 EP2576168A1 (en) 2013-04-10
EP2576168B1 true EP2576168B1 (en) 2014-03-19

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EP (1) EP2576168B1 (en)
ES (1) ES2460090T3 (en)
PL (1) PL2576168T3 (en)
WO (1) WO2011151401A1 (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE687837C (en) * 1936-08-20 1940-02-07 J Laroche Lechat Sa Ets Device for de-dripping wet conveyed material
FR991280A (en) * 1949-05-14 1951-10-03 Le Caoutchouc S I T Improvements to conveyor belts for transporting fine-grained granular materials
CA948997A (en) * 1971-06-09 1974-06-11 Richard B. H. Sewell Belt for picking up liquids
JPS617117A (en) * 1984-06-19 1986-01-13 Yamauchi Rubber Ind Co Ltd Endless belt
DE4115615A1 (en) * 1991-05-14 1992-11-19 Rolf Weigele Dough conveyor belt - comprises flexible plastics with structured non-stick surface
CA2363480A1 (en) 2001-05-14 2002-11-14 Ronald F. Ryde Grooved flexible conveyor belt
US7670240B2 (en) * 2001-10-04 2010-03-02 Otis Elevator Company Elevator belt assembly with noise reducing groove arrangement
US20060029785A1 (en) 2004-08-03 2006-02-09 Lance Wang Gypsum boards with glass fiber reinforcements having a titanate or zirconate coupling coating
US8192317B2 (en) 2006-11-22 2012-06-05 Veyance Technologies, Inc. Reinforced belt for powerturn applications
US20100055439A1 (en) * 2008-08-29 2010-03-04 Lee Jerry H C WUCS Fibers Having Improved Flowing And Dispersing Properties

Also Published As

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EP2576168A1 (en) 2013-04-10
WO2011151401A1 (en) 2011-12-08
PL2576168T3 (en) 2014-08-29
ES2460090T3 (en) 2014-05-13

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