WO1994013443A1 - Methode et installation de production de panneaux de platre - Google Patents

Methode et installation de production de panneaux de platre Download PDF

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Publication number
WO1994013443A1
WO1994013443A1 PCT/NO1993/000181 NO9300181W WO9413443A1 WO 1994013443 A1 WO1994013443 A1 WO 1994013443A1 NO 9300181 W NO9300181 W NO 9300181W WO 9413443 A1 WO9413443 A1 WO 9413443A1
Authority
WO
WIPO (PCT)
Prior art keywords
dryer
plate
plant
plate string
string
Prior art date
Application number
PCT/NO1993/000181
Other languages
English (en)
Inventor
Walter Nilsen
Original Assignee
Walter Nilsen
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 Walter Nilsen filed Critical Walter Nilsen
Priority to AU56608/94A priority Critical patent/AU5660894A/en
Publication of WO1994013443A1 publication Critical patent/WO1994013443A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
    • 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
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/043—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of plaster

Definitions

  • the present invention relates to a method and a plant for manufacturing gypsum plates, especially gypsum plates to be used as construction panels, which gypsum plates are manufactured in a production line, a web of gypsum slurry being introduced between covering layers of paper board and after hardening to a self-supporting plate string being subjected to cutting in suitable plate length and drying and curing.
  • the invention also relates to a plant for such manufac- turing of gypsum plates .
  • gypsum plates are manufactured along a production line, wherein gypsum slurry is introduced between covering layers of paper board, this web being transported along a roller band including partly driven rollers and partly idle rollers. After the web has hardened to a self-supporting plate string, the string is cut into appropriate plate lengths, which are taken out from the production line, are stacked in suitable stacks and passed into a drier. Herein drying is performed for sequentially accompanied stacks of cut plates, the plates being subject to an appropriate heat influence, for example by means of hot air.
  • the object of the present invention is to provide a novel method and a new plant for manufacturing gypsum plates, wherein it is possible to eliminate complicated apparatus which are necessary for cutting and stacking plates prior to the drying process, and otherwise suggest a production line which can be built in a more cost-saving manner, which is simpler in its construction and which can be controlled in a simpler manner involving less maintenance and fewer moving parts.
  • Another object according to the present invention is to suggest a method and a plant for manufacturing gypsum plates rendering a more uniform drying and thereby a more homogeneous end product, the basic idea thereof being the application of only one plate at one level in the dryer, including one or more plates but then substantially at the same horizontal drying level.
  • a further object is to the fact of providing a method and a plant requiring a reduced length of the factory works, which entails cost-saving as regards building expenditure and utilization of heat resources.
  • a method a stated in the preamble which is characterized in that the more or less hardened self-supporting plate string is passed uninterruptedly in substantially one plane through a first dryer arranged on a first level for introductory plate string drying and curing, whereafter the plate string is passed along an approximately 180° arch having an appropriate radius, such that the plate string or the strings are turned prior to being passed into a second dryer arranged at a second level, and whereafter the dried and cured plate string is cut to appropriate lengths.
  • a plant for manufacturing gypsum plates will be characterized in that the plant comprises means which bring a more or less hardened plate string unbroken in one plane through a dryer arranged at a first level for introductory plate string drying and curing, comprising turning means which bend the more or less hardened plate string through an arch of approximately 180° having an appropriate radius, such that the plate string or the strings are turned prior to being introduced into a second dryer arranged .at a second level for subsequent curing and drying of the plate string, and comprising adapted cutting equipment at the outlet of the second dryer.
  • Fig. 1A is a top view
  • Fig. IB is a side view on a larger scale of a part of a first plant for manufacturing gypsum plates, wherein the present invention is included.
  • Fig. 2 is a top view on a larger scale of the main parts illustrated in Fig. 1A and Fig. IB.
  • Figures 3A and 3B illustrate sections at different scales taken along the line A-A in Fig. 1A.
  • Fig. 4 illustrates on a . larger scale a section taken along the line B-B in Fig. 1A, namely through two dryer sections of a plant wherein the present invention is applied.
  • Fig. 5A is a top view and Fig. 5B is a side view which schematically illustrates a part of a second plant for manufacturing gypsum plates, wherein the present inven ⁇ tion is included, comprising two parallel plate strings.
  • Fig. 5C illustrates on a larger scale a detail of an extruder or forming plate included in the plant illu ⁇ strated in Fig. 5B.
  • Figures 6A and 6B illustrate on a larger scale a top view and a side view, respectively, in the area of wreckage paths between extruder and the first dryer.
  • Fig. 7A is a schematical side view of a turning zone ac ⁇ cording to the invention.
  • Fig. 7B illustrates on a larger scale details of Fig. 7A related to the guiding of plate strings into the turning zone.
  • Figures 8A, 8B and 8C are side view, top view and front view, respectively, of the plant at the turning zone, whereas Fig. 8D illustrates on a larger scale details of Fig. 8A.
  • Fig. 9 illustrates schematically a specific arrangement of a group of transport rollers for transporting two sub ⁇ stantially parallel plate strings across a certain trans- portation length.
  • Fig. 10 illustrates schematically the same type of speci ⁇ fic arrangement as Fig. 9, but to a more pronounced degree.
  • Fig. 11 illustrates on a larger scale details of the transport rollers according to Figures 9 and 10.
  • a forming sta ⁇ tion 1 provided a gypsum slurry through a mixer 2, where- in are mixed gypsum and additives in an appropriate ratio.
  • the gypsum slurry is guided between covering lay ⁇ ers of paper board which are passed by the forming sta- tion 1 via paper board rollers 3, for thereby providing a gypsum plate string 4 which on both sides are covered by paper board and with folded-in paper board along the side edges thereof.
  • This plate string 4 is transported away. from the forming station through appropriately driven and non-driven rollers, across such a long distance and dur ⁇ ing such a long time interval that the gypsum hardens for constituting a self-supporting plate string.
  • This more or less hardened self-supporting plate string 4 is passed, according to the invention, uninterruptedly to a first dryer 5A which can be divided into one or more drying zones, for the introductory plate string drying and curing, whereafter the plate string is passed along an approximately 180° arch 11 having an appropriate radius R, such that the plate string 4 or strings is or are turned prior to being passed into a second dryer 5B provided at a second level and comprising one or more drying zones, and whereafter the dried and cured plate string 4 is cut into appropriate lengths.
  • a first dryer 5A which can be divided into one or more drying zones, for the introductory plate string drying and curing, whereafter the plate string is passed along an approximately 180° arch 11 having an appropriate radius R, such that the plate string 4 or strings is or are turned prior to being passed into a second dryer 5B provided at a second level and comprising one or more drying zones, and whereafter the dried and cured plate string 4 is cut into appropriate lengths.
  • a common mixer By using a plurality of plate strings there may appropri ⁇ ately be used a common mixer, or alternatively it can be used one mixer for each plate string.
  • the production line for the plate string 4 is suitably located at a first level which preferably is at the same level as the first dryer 5A, and after the plate string 4 emerges from said first dryer 5A the more or less hardened plate string 4 is passed through the approximately 180° arch 11 with a suitable radius R, such that the plate string 4, possibly the plate strings 4a and 4b, can be turned prior to being guided into a second dryer 5B.
  • first dryer 5A is at a first upper level
  • second dryer 5B is at a second lower level, said first and second dryers being complete ⁇ ly or partly built together.
  • the first dryer 5A has a longitudinal dimension corresponding approximately to one third of the overall drying length.
  • elongated dryers 5A and 5B which are divided into several zones, each zone being controlled as regards heat supply and ventilation.
  • the drying then takes place at one level, whether one uses one plate string or a plurality of plate strings, there is achieved a more uniform drying over the complete plate string, and there is avoided unevenly dried cut edges, as in previously know prior art. Further, the drying at one level will involve a simpler construction of the drying zones, which zones will be more easily regulated as regards air circu- lation and heat intensity.
  • suitable cutting equipment for example an arrangement 6 including scissors, which appropriately may comprise so-called running scissors, which involves that cutting may take place synchronously with the out- feed of the finished dried and cured plate string.
  • FIGS 5A and 5B there is illustrated a top view and a side view, respectively, of a part of a plant of a second embodiment for manufacturing gypsum plates, there being here at a forming station 101 provided gypsum slurry via one or more mixers for the production of two substantially parallel gypsum plate strings 104a and 104b.
  • the gypsum slurry is passed through covering layers of paper board, there here being used four paper board webs, paper board webs 103a and 103b for the gypsum plate string 104a, and paper board webs 103c and 103d for gyp- sum plate string 104b, respectively, for thereby provid ⁇ ing said gypsum plate strings 104a and 104b with folded- in paper board along respective side edges.
  • paper board webs 103a and 103b for the gypsum plate string 104a
  • paper board webs 103c and 103d for gyp- sum plate string 104b
  • the extruder 101 comprises an upper forming plate 112 and a lower forming plate 113 the gab therebetween, here designated 114, corresponding to a preselected con- trollable thickness of the plate string in question.
  • an upper lid 115 along which and via a pipe 116 one of the paper board webs 113b is passed, as well as a lower bent plate 117 along which the second paper board web 103a for the gyp ⁇ sum plate string in question is guided, and then carrying the previously applied gypsum slurry.
  • At the outlet 118 of the extruder 101 there will thus be formed said plate strings 104a and 104b which are transported away from the forming station or the extruder 101 via a conveyor band
  • each fresh plate string 104a, 104b is transported away from the forming station 101 so far and for such a time period that the gypsum hardens for constituting self-supporting plate strings.
  • the plate strings 104a and 104b must pass a wreckage area, as this more specifically appears in Figures 6A and 6B, said Figures on a larger scale illustrating a top view and side view, respectively, of the area of the wreckage path provided between the extruder 101 and a first dryer 105A.
  • the wreckage area comprises as in the previously discussed embodiment, wreckage scissors 107, an acceleration path 8, a tilting path or a tilting lift 9, as well as a wreckage path 110 which communicates with the tilting lift 9 and the acceleration path 8, in case there during the start-up or the production are observed gypsum strings which do not meet the requirements as regards quality, dimension and other parameters being of importance for the operation and the final results.
  • the wreckage path 110 can communicate with a grinder or chopper 122 as well as a waste funnel collecting the chopped and wrecked plates and communicating with a belt conveyor 124 for possible recirculation of wrecking goods.
  • the acceleration path 108 has the function of during a wrecking operation to accelerate the cut section out of the normal production line, such that the subse ⁇ quent production string can be passed on to the first dryer 105A as an uninterrupted string without the danger of colliding with the cut wreckage section.
  • the hardened self-supporting plate strings 104a, 104b are passed on uninterrupted to a first dryer 105A, which can be divided into one or more drying zones, for example three drying zones having an individual length of for example 50 , for the introduc ⁇ tory plate string drying and hardening, whereafter the plate strings 104a, 104b, as illustrated in Figures 7A and 7B, are passed into a turning zone, more specifically a 180° arch 111 having an appropriate radius, for example between three and five meters, such that the plate strings can still remain unbroken after the turning, whereafter said plates are guided into a second dryer 105B, as this also appears from Figures 8A-8C.
  • a first dryer 105A which can be divided into one or more drying zones, for example three drying zones having an individual length of for example 50 , for the introduc ⁇ tory plate string drying and hardening, whereafter the plate strings 104a, 104b, as illustrated in Figures 7A and 7B, are passed into a turning zone, more specifically a 180°
  • Fig. 7A it is illustrated that one of the plate strings 104a enters the turning area or the arch 111 via two first guiding rollers 122a and 122b whereafter they pass a first set of rollers 123n which extend across app- roximately a quarter of a circle before the plate string 104a via a marker 124 is guided into a second set of rollers 124n giving the plate 104a abutting support against the opposite side for the remaining quarter of the circle in relation to the introductory quarter of the circle of the arch 111.
  • first set of rollers 123n can be provided on a first set of supporting rails 125, whereas the lower second set of rollers 124n are carried by a second set of supporting rails 126.
  • first separate driving means 127 for driving the upper drive rollers comprising the roller 122b as well as further drive rollers arranged upstream in relation to the turning zone 111, as well as a lower separate drive means 128 for operating lower drive rollers 124b, as well as further drive rollers arranged downstream in relation to the turning area 111.
  • a sensor 124x for sensing whether the gypsum string or strings 104a, 104b have an inlet angle, respec ⁇ tively a tensioning or slackening degree in the turning area, which should imply that the separate driving means 127 and 128 for the upper and lower rollers, respective ⁇ ly, should be regulated, see specifically Fig. 8D.
  • the turning area 111 may appropriately be built into an insulated housing 130 and may appropriately be provided without separate heating, but including suitable access and gangways 131n for simplified inspection and mainten ⁇ ance.
  • the production line for the plate strings 104a, 104b is located at a first level which preferably is on the same level as the first dryer 105A, and after the plate strings 104a, 104b, respectively, have emerged from the first dryer 105A, they will primarily be guided through the turning area 111 and then into the second dryer 105B which for example may comprise seven drying zones giving appropriate individual or co-operated drying prior to cutting and sorting at the outlet of the second dryer 105B.
  • the parallel plates preferably in the area between the extruder 101 and the wreckage station 107-110, are guided towards each other for rendering as little difference therebetween as poss- ible, a lesser gap between the plate strings resulting in a better drying of egdes facing each other, said edges then not to such a strong degree being subjected to de ⁇ hydration.
  • This is somewhat dependent upon how the drying zones are constructed, but such a minimum or optimum gap width is of specific importance when the regulation of the drying air within the dryer can hardly be performed individually in said edge areas.
  • the outer edges can, however, more easily be screened by means of cold air strata, for thereby also in these outer edge areas to achieve a homogeneous and optimum drying of edge zones.
  • FIG. 9 illustrates schematically a specific assembly of a group of transport rollers for driving various groups of transport rollers along a cer ⁇ tain transportation length, and for the purpose of bring ⁇ ing two current plate strings 104a and 104b closer to each other. Consequently, Fig. 9 illustrates the two plate strings 104a and 104b having a first mutual spacing 135A, for example 250 mm, but being transported on trans ⁇ port rollers 136n which are inclined in relation to each other under a certain angle ⁇ l , whereas Fig.
  • Fig. 11 there is illustrated a section through one of the gypsum plate strings 104a when said string is passed from a horizontal roller 136 onto an inclined roller 136n under the forming of the angle ⁇ l , which can represent an inclination per roller, for example of 1°, until the apex of the inclined path and the angle ⁇ 2 has been achieved, whereafter the path is flattened again and with the two parallel gypsum plate strings 104a and 104b having been brought together to a minimum mutual spacing or possibly abutting edges .
  • the angle ⁇ l which can represent an inclination per roller, for example of 1°
  • rollers may be provided inclined in relation to each other in the horizontal plane, but in such a manner that two, possibly several plates, are subjected to being brought closer to each other prior to the arrival at the wreckage path and the first dryer.
  • the production line is arranged at the same level as a first longitudinal dryer, all of which is located above a second longitudinal dryer.
  • the production line consists of one, two, possibly a plurality of, parallel plate strings in the same plane but having a least possible spacing therebe ⁇ tween.
  • a common mixer possibly two mixers.
  • a common forming station possibly two separate forming stations, comprising forming rollers or extruding system.
  • the wet end being equipped with wreckage scissors, acceleration path, tilting lift and wreckage path, in order to avoid passing wreckage from start-up through the first dryer.
  • the plate strings are guided in continuous lengths into a first dryer, thereafter passed through an at least 180° arch having a selected necessary radius 4 . . This arch turns the plate string(s) before being passed into the second dryer.
  • each of the dryers can be divided into a plurality of zones hav- ing an individual burner for each zone and ventila ⁇ tion from some of the zones .
  • the plates are cut at the dry end, possibly by runn ⁇ ing scissors.
  • hardening path forming band and rollers
  • primary part of the dryer approximately 1/3
  • the continuous plate is turned 180° after the first part of the dryer and is guided into the second part of the dryer at lower level. In this manner there is achieved a fabric of shorter length than what is the case in previously known plants.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Textile Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Producing Shaped Articles From Materials (AREA)

Abstract

Méthode et installation de fabrication de panneaux de plâtre, notamment de panneaux de plâtre destinés à être employés comme panneaux de construction. Les panneaux sont réalisés à la chaîne. Un jet de plâtre en émulsion est introduit entre deux couches de recouvrement en carton et, après la prise, l'ensemble formant une chaîne continue autoportante (4) est soumis à un découpage en panneaux de longueur appropriée puis à un séchage et à un durcissement. L'invention porte à cette fin sur une installation d'une longueur raisonnable permettant d'appliquer ce procédé, conçue avec autant de rationalité et de souci de préservation de la qualité que possible. A cette fin, il est prévu que la chaîne continue autoportante plus ou moins durcie est transférée sans interruption en suivant essentiellement un certain plan à travers un premier séchoir (5A) installé sur un premier niveau, de manière à accueillir et assurer le séchage et le durcissement du panneau, après quoi celui-ci est transféré selon une courbe (11) à 180° environ présentant un rayon suffisant pour retourner le panneau avant de l'introduire dans un deuxième séchoir (5B) installé sur un second niveau, où il subit, après séchage et durcissement, le découpage aux longueurs appropriées.
PCT/NO1993/000181 1992-12-08 1993-12-02 Methode et installation de production de panneaux de platre WO1994013443A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU56608/94A AU5660894A (en) 1992-12-08 1993-12-02 Method and plant for the production of gypsum panels

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO924743 1992-12-08
NO924743A NO176653C (no) 1992-12-08 1992-12-08 Fremgangsmåte og anlegg for fremstilling av gipsplater

Publications (1)

Publication Number Publication Date
WO1994013443A1 true WO1994013443A1 (fr) 1994-06-23

Family

ID=19895662

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1993/000181 WO1994013443A1 (fr) 1992-12-08 1993-12-02 Methode et installation de production de panneaux de platre

Country Status (3)

Country Link
AU (1) AU5660894A (fr)
NO (1) NO176653C (fr)
WO (1) WO1994013443A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1205722A1 (fr) * 2000-11-08 2002-05-15 Lafarge Platres Procédé de séchage de plaques de plâtre, dispositif pour sa mise en oeuvre

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103862565B (zh) * 2014-02-21 2016-05-25 泰山石膏股份有限公司 年产量6000万㎡大型纸面石膏板生产工艺及其生产线

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781390A (en) * 1969-01-22 1973-12-25 Schlegel Mfg Co Continuous molding method
NO134359B (fr) * 1973-02-15 1976-06-21 Walter Nilsen
DE3801315A1 (de) * 1988-01-19 1989-07-27 Wuertex Maschinenbau Hofmann G Anlage zur herstellung von plattenfoermigen koerpern aus einer mischung von gips und faserstoff
DE4025797A1 (de) * 1990-08-15 1992-04-23 Babcock Bsh Ag Verfahren zur herstellung von plattenfoermigen koerpern aus einer mischung von gips und faserstoffen sowie anlage zur durchfuehrung dieses verfahrens

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781390A (en) * 1969-01-22 1973-12-25 Schlegel Mfg Co Continuous molding method
NO134359B (fr) * 1973-02-15 1976-06-21 Walter Nilsen
DE3801315A1 (de) * 1988-01-19 1989-07-27 Wuertex Maschinenbau Hofmann G Anlage zur herstellung von plattenfoermigen koerpern aus einer mischung von gips und faserstoff
DE4025797A1 (de) * 1990-08-15 1992-04-23 Babcock Bsh Ag Verfahren zur herstellung von plattenfoermigen koerpern aus einer mischung von gips und faserstoffen sowie anlage zur durchfuehrung dieses verfahrens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1205722A1 (fr) * 2000-11-08 2002-05-15 Lafarge Platres Procédé de séchage de plaques de plâtre, dispositif pour sa mise en oeuvre
WO2002039041A1 (fr) * 2000-11-08 2002-05-16 Lafarge Platres Procede de sechage de plaques de platre, dispositif pour sa mise en oeuvre
AU2002223741B2 (en) * 2000-11-08 2006-03-16 Lafarge Platres Method for drying plaster boards, device therefor

Also Published As

Publication number Publication date
NO924743D0 (no) 1992-12-08
AU5660894A (en) 1994-07-04
NO924743L (no) 1994-06-09
NO176653C (no) 1995-05-10
NO176653B (no) 1995-01-30

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