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WO2003031895A1 - Etuve a durcir - Google Patents

Etuve a durcir Download PDF

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Publication number
WO2003031895A1
WO2003031895A1 PCT/DK2002/000634 DK0200634W WO03031895A1 WO 2003031895 A1 WO2003031895 A1 WO 2003031895A1 DK 0200634 W DK0200634 W DK 0200634W WO 03031895 A1 WO03031895 A1 WO 03031895A1
Authority
WO
WIPO (PCT)
Prior art keywords
slats
curing
fingers
mineral wool
conveyor
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.)
Ceased
Application number
PCT/DK2002/000634
Other languages
English (en)
Inventor
Klarskov Erik Petersen
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.)
Rockwool AS
Original Assignee
Rockwool International AS
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 Rockwool International AS filed Critical Rockwool International AS
Publication of WO2003031895A1 publication Critical patent/WO2003031895A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
    • B65G17/06—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms
    • B65G17/08—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms the surface being formed by the traction element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path being carried by a conveyor
    • F27B9/243—Endless-strand conveyor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/12—Travelling or movable supports or containers for the charge
    • F27D2003/121—Band, belt or mesh

Definitions

  • the present invention relates to a curing oven for mineral wool as well as a set of slats for an endless conveyor for the curing oven and a method of curing a binder incorporated into mineral wool.
  • Mineral wool is extensively used for insulation purposes and for this purpose the mineral wool is often offered for sale in the shape of mats or batts.
  • the term mineral wool encompasses all types of man made vitreous fibers
  • MMVF rock wool
  • slag wool glass wool
  • the mineral wool mats are traditionally manufactured by pouring molten mineral material onto a spinning wheel rotating at high speed.
  • the spinning wheel produces the fibres which are drawn into a spinning chamber by blowing and suction means and at the same time the fibres are applied with binder from spraying nozzles.
  • the fibres are collected on a conveyor to form a mat with a desired thickness.
  • the mat may be subjected to further treatment like compression or folding by passing a pendulum, before the binder on the fibres is cured in the curing oven.
  • the different techniques for forming mats of mineral wool are well-known to persons skilled in the art.
  • GB No. 774,043 discloses a curing oven for mineral wool.
  • the mineral wool is passed between two endless conveying bands or belts of perforated sheets, and the mineral wool may be slightly compressed.
  • the object of the present invention is thus to provide a curing oven for mineral material as well as a set of slats for an endless conveyor for the curing oven and a method of curing a binder incorporated into the mineral material by use of the curing oven by which the above drawbacks can be avoided.
  • Another object of the invention is to provide a curing oven having a smooth surface with little or no tendency to create protruding material in the cured mineral wool.
  • the invention relates to a set of slats for an endless conveyor comprising a plurality of perforated slats.
  • Each of the slats preferably has a shape like a box with a rectangular cross section.
  • the box has preferably a width of 100-300 mm, a lenght of 1000-4000 mm and a height of 30-250 mm.
  • the box has dimensions of 130 mm x 1900 mm x 50 mm.
  • the slats have a stiffness which is sufficient to withstand the pressure from the compressed mineral wool.
  • Each of the slats comprises a contact surface, defined as the surface which is supposed to be in contact with the mineral material, when the set of slats is collected to an endless conveyor, and the mineral material is compressed between said conveyor and another corresponding conveyor.
  • the contact surface of each slat is constituted by one substantially planar surface.
  • the contact surface has an essentially rectangular cross section.
  • the contact surface preferably has the dimensions of 100-200 mm x 1000-4000 mm. In a preferred embodiment the dimension is 150 mm x 1900 mm.
  • Each of the slats also comprises two opposing side edges, a front edge and a rear edge.
  • the two opposing side edges of the slat are preferably parallel to each other.
  • each slat of the set of slats is substantially equal to each other.
  • the length of the front edges of each of the slats is preferably at least 2 times the length of the side edges, even more preferably the length of the front edges is at least 5 times the length of the side edges.
  • the slats are preferably made of a material selected from the group consisting of steel, stainless steel, iron, ceramics, plastic or any electrically isolating material.
  • the slats could also be made of a combination of the above-mentioned materials.
  • the set of slats for an endless conveyor it is possible to produce a conveyor for conveying mineral wool through a curing oven without having the above-described drawbacks.
  • the mineral wool has a highly decreased tendency to create protruding material in the surface of the cured mineral wool batts or mats, especially along the gap following the zig-zag line between the slats.
  • the front edges and the rear edges of the slats comprise a plurality of fingers. These fingers of the front edges of the slats are complementary to the fingers of the rear edges of the slats so that the front edge fingers of one lamella can be in mesh with the rear edge fingers of another lamella.
  • the fingers in mesh serve as- a support surface between neighbouring slats, which support surface forms a substantially continuous contact surface between the neighbouring slats.
  • Each finger comprises a fingertip.
  • the fingertip is bent downwardly from the contact surface in a bending angle defined as the angle between the tangent to the contact surface of the slat at the finger base and the tangent to the contact surface of the slat at the fingertip.
  • the bending angle is at least 2 degrees, preferably at least 3 degrees.
  • the fingers of the front edge and the rear edge have substantially equal shape and size.
  • the fingers preferably have a length from finger base to finger tip between 3 and 40 mm, more preferably between 8 and 30 mm, and even more preferably around 25 mm.
  • each of the fingers of the front edge and the rear edge is divided into a non-bending base section closest to the finger base and a bending tip section closest to the finger tip, wherein the tip section constitutes between 1/4 and 3/4 of the finger length.
  • the curing oven comprises at least one feeding conveyor for feeding the mineral wool to the curing zone, and the two or more curing conveyors comprise a plurality of perforated slats.
  • Each of the slats comprises a contact surface, which contact surface is essentially rectangular.
  • the slats further comprise two opposing side edges and furthermore a front edge and a rear edge.
  • the front edges and the rear edges of the slats comprise a plurality of fingers.
  • Each finger comprises a finger tip, which finger tip is bent downwardly from the contact surface of the slats.
  • the slats are linked to each other via two or more connecting means so that the contact surfaces of the slats constitute the contact surface of the conveyor.
  • the conveyor is driven by at least one driving means preferably placed at the exit of the curing zone.
  • the fingers of the front edges of one slat are complementary to the fingers of the rear edges of the slat in front of the one slat, and the bending of the fingers is sufficient to allow the fingers to form a plane or bend downwardly from the surface of the conveyor in such a way that the mineral wool is not being trapped between the fingers of the slats, when said mineral wool gets in contact with said conveyor.
  • the mineral wool is not trapped when the conveyor moves through the curing oven and in particular the mineral wool is not trapped when the slats move around the driving means. Consequently undesired protruding fibre material from the surface of the mineral wool is avoided.
  • the typical conveyor band of a conventional curing oven normally consists of a number of rigid slats which unfortunately produces protruding marks or ridges in the surfaces of the mineral wool.
  • the curing oven comprising one or more endless feeding conveyors according to the invention the drawback of producing protruding marks or ridges in the surfaces of the mineral wool is avoided.
  • the mineral wool gets in contact with the curing conveyor at a position where curvature-radius of the conveyor trajectory is at least 250 mm. In this embodiment the best properties with regard to compression are achieved.
  • the two or more endless curing conveyors comprise a plurality of perforated slats as described above.
  • the slats are linked to each other via one or more connecting means, and the connecting means preferably are one or more chains.
  • the curing oven comprises two curing conveyors placed opposite to each other and with their contact surfaces facing each other.
  • the contact surfaces are preferably parallel and with a distance between them, which create space for the mineral wool to be cured in the curing oven.
  • the two conveyors are driven by rotating driving means which rotate in the opposite direction of the rotation in order to transport the mineral wool through the curing zone.
  • the driving means are preferably driving chain wheels and chains.
  • the conveyors move with approximately the same speed to avoid introducing unwanted tensions into the mineral wool.
  • the conveyors comprise slats which are substantially equal to each other .
  • the invention also relates to a method of curing a binder in a mineral wool material by using a curing oven as previously described, which method comprises the steps of:
  • the mineral wool is transported on a feeding conveyor into the entrance between the curing conveyors, wherein the mineral wool is brought into contact with the upper and lower curing conveyor.
  • the mineral wool is then compressed between the upper and lower curing conveyor and the thickness and the density of the mineral wool batt or mat are hereby determined.
  • the mineral wool is not trapped between the fingers of the slats during the process .
  • a binder as used herein comprises any material which is suited as a binder or binding agent in mineral fibre materials for the above products.
  • the binder is a heat curing binder.
  • Figure 1 and 2 illustrates a slat according to the invention.
  • Figure 3 illustrates a feeding conveyor comprising a plurality of perforated slats according to the invention.
  • Figure 4 illustrates a slat according to the invention.
  • FIG 1 a cross section of a slat according to the invention in the direction front edge to rear edge and from the bottom.
  • the slat 1 comprises a number of perforations 2 which will allow hot air to pass through the slat and into the mineral wool to be cured.
  • the slat 1 comprises a number of fingers 3 on the front edge and a number of fingers 4 on the rear edge.
  • the fingers 3 and 4 are arranged to be in mesh with fingers from neighbouring slats as indicated on the figure, where the fingers 4 on the rear edge of the slat 1 are in mesh with the fingers 5 on the front edge of the neighbouring slat.
  • a slat according to the invention is seen in the direction of side edge to side edge.
  • the slat 6 comprises fingers 7 at the front edge and fingers 8 at the rear edge. The downward bending of the fingers 7 and 8 are seen at the points 9 and 10.
  • FIG 3 shows the principle when a set of slats is connected to form a conveyor, which is moved around a curve 13.
  • the slats 11 form an endless conveyor 12, which is forced to move around a curve 13 by means of a driving roller chain 14 and a roller 15 as indicated on the figure.
  • the slats 11 are connected to the driving roller chain 14 via girders 16.
  • the fingers 17 on the front edge and the fingers 18 on the rear edge on neighbouring slats are not in mesh with each other.
  • the fingers 17 on the front edge and the fingers 18 on the rear edge on neighbouring slats are in mesh with each other.
  • the fingers 17 and 18 are bending downwardly towards the driving roller chain 15 in such a way that the fingers do not protrude above the planes defined by the contact surfaces 19 of the slats 11.
  • Figure 4 a and b shows an embodiment of the invention in more details.
  • Figure 4a shows a conveyor 20 with slats 21 according to the invention. During the bending of the conveyor 20 the fingers 22 and 23 are in mesh with each other and do not protrude from the surface 24 of the conveyor.
  • Figure 4b shows the conveyor 20 in a linear movement where the slats 21 are in line relationship. The fingers 22 and 23 are pointing away from the surface 24 which is in contact with the mineral wool. The surface 24 is substantially uniform and planar.
  • Figure 4c shows an embodiment according to the prior art.
  • the conveyor 25 is constituted by a number of slats 26. When the conveyor 25 is in a bending mode, the end pieces 27 and 28 will protrude and from the surface 26 and may > cause damage to mineral wool in contact with the surface 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

L'invention a trait à un ensemble de planchettes destinées à un transporteur continu comportant une pluralité de planchettes perforées. Chaque planchette possède de préférence la forme d'une boîte dotée d'une section transversale rectangulaire. L'invention se rapporte également à une étuve à durcir comprenant au moins deux transporteurs continus de durcissement, conçus pour transporter de la laine minérale à travers une zone de durcissement. L'étuve à durcir comprend au moins un transporteur d'alimentation destiné à fournir la laine minérale à la zone de durcissement, et lesdits transporteurs de durcissement comprennent une pluralité de planchettes perforées. L'invention concerne également un procédé consistant à durcir un liant dans un matériau de laine minérale au moyen de l'étuve à durcir.
PCT/DK2002/000634 2001-10-10 2002-09-26 Etuve a durcir Ceased WO2003031895A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200101497 2001-10-10
DKPA200101497 2001-10-10

Publications (1)

Publication Number Publication Date
WO2003031895A1 true WO2003031895A1 (fr) 2003-04-17

Family

ID=8160759

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2002/000634 Ceased WO2003031895A1 (fr) 2001-10-10 2002-09-26 Etuve a durcir

Country Status (1)

Country Link
WO (1) WO2003031895A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020103452B3 (de) * 2020-02-11 2021-04-22 Bernd Münstermann Gmbh & Co. Kg Förderbandsegment eines Plattenförderbandes, Plattenförderband und Verfahren zum Herstellen eines Förderbandsegments
DE102019113037B4 (de) 2019-05-17 2024-02-01 Bernd Münstermann Gmbh & Co. Kg Plattenförderband aus miteinander gelenkig verbundenen Förderbandsegmenten und Ofen mit einem Plattenförderband

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2109948A1 (de) * 1971-03-02 1972-10-05 Polysius Ag, 4723 Neubeckum Wanderrost
US3863754A (en) * 1972-10-24 1975-02-04 United States Steel Corp Flat wire conveyor belt with improved covering
DE29806520U1 (de) * 1998-04-09 1998-07-23 Wolf - Montage - Automationsanlagen + Sondermaschinen - GmbH, 97264 Helmstadt Tragteil einer Transporteinrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2109948A1 (de) * 1971-03-02 1972-10-05 Polysius Ag, 4723 Neubeckum Wanderrost
US3863754A (en) * 1972-10-24 1975-02-04 United States Steel Corp Flat wire conveyor belt with improved covering
DE29806520U1 (de) * 1998-04-09 1998-07-23 Wolf - Montage - Automationsanlagen + Sondermaschinen - GmbH, 97264 Helmstadt Tragteil einer Transporteinrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019113037B4 (de) 2019-05-17 2024-02-01 Bernd Münstermann Gmbh & Co. Kg Plattenförderband aus miteinander gelenkig verbundenen Förderbandsegmenten und Ofen mit einem Plattenförderband
DE102020103452B3 (de) * 2020-02-11 2021-04-22 Bernd Münstermann Gmbh & Co. Kg Förderbandsegment eines Plattenförderbandes, Plattenförderband und Verfahren zum Herstellen eines Förderbandsegments
WO2021160591A1 (fr) 2020-02-11 2021-08-19 Bernd Münstermann Gmbh & Co. Kg Segment de bande transporteuse d'un transporteur à palettes, transporteur à palettes et procédé de production d'un segment de bande transporteuse

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