EP1499482B1 - Method for the production of plaster plates having 4 tapered edges - Google Patents

Method for the production of plaster plates having 4 tapered edges Download PDF

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Publication number
EP1499482B1
EP1499482B1 EP03740583A EP03740583A EP1499482B1 EP 1499482 B1 EP1499482 B1 EP 1499482B1 EP 03740583 A EP03740583 A EP 03740583A EP 03740583 A EP03740583 A EP 03740583A EP 1499482 B1 EP1499482 B1 EP 1499482B1
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EP
European Patent Office
Prior art keywords
packing
paper
packing pieces
pieces
paper sheet
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.)
Expired - Lifetime
Application number
EP03740583A
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German (de)
French (fr)
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EP1499482A1 (en
Inventor
Michel Capron
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.)
Etex France Building Performance SA
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Lafarge Platres SA
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Publication of EP1499482A1 publication Critical patent/EP1499482A1/en
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Classifications

    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007—Running or continuous length work
    • Y10T156/1023—Surface deformation only [e.g., embossing]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y10T156/1075—Prior to assembly of plural laminae from single stock and assembling to each other or to additional lamina
    • Y10T156/1077—Applying plural cut laminae to single face of additional lamina
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
    • Y10T156/1317—Means feeding plural workpieces to be joined
    • Y10T156/1322—Severing before bonding or assembling of parts
    • Y10T156/133—Delivering cut part to indefinite or running length web
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
    • Y10T156/1317—Means feeding plural workpieces to be joined
    • Y10T156/1322—Severing before bonding or assembling of parts
    • Y10T156/133—Delivering cut part to indefinite or running length web
    • Y10T156/1335—Cutter also delivers cut piece
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1737—Discontinuous, spaced area, and/or patterned pressing

Definitions

  • the present invention relates to a method and devices for manufacturing gypsum board having 4 thinned edges on their periphery.
  • the technical field of the invention is the field of the manufacture of continuous plasterboard in which two sheets of cardboard, one lower called cream paper, the other upper called gray paper unwind and come to lock in a shaper which is either forming trays or forming rolls, a plaster based hydraulic binder.
  • This composite strip is sheared to length, it goes into a drying oven, it is finally re-sawed to final length before being stacked.
  • Such a method is well known elsewhere and therefore will not be described in itself in more detail in the present description.
  • US-A-2,168,803 discloses a method and a device for the manufacture of plasterboard.
  • US Pat. No. 2,238,017 attempted in 1941 to create a folding allowance for the carton, this invention never gave rise to industrial development, probably because the folding did not withstand the tension of the paper, or the weight of the paper. hydraulic binder.
  • US Pat. No. 2,991,825 attempted 20 years later to make impressions in a As a result of the roll-forming system, it has not been followed by industrial development, certainly because the generated impression is being erased by crushing the hardening strip.
  • the transverse thinning resulting from fingerprints have qualities of surface appearance, shape and strength identical to longitudinal thinning and are well manufactured in a continuous process which proves to be very low cost and very interesting for the industrial and the plasterboard market.
  • the process according to the invention consists first of all in continuously preparing shims (5) at a rapid rate.
  • These shims (5) are extracted from an expandable, flexible, lightweight, inexpensive material.
  • These shims (5) have a thickness of between 1 and 2 mm and a width of between 5 and 20 mm and a length equal to the plate width being produced minus a value of between 0 and 10 cm.
  • these shims (5) will be extracted from a roll (26) of flexible tape (27), cut to length and glued on their upper face.
  • the wedges (5) are in a material having the same expansion to moisture as the cream paper (8) on which it is fixed. It is for example a wedge (5) of paper of the same nature as the cream paper (8), so that the composite strip (45) can expand freely and without being held by the wedge (5) during its hardening.
  • the method according to the invention then consists of sticking these shims (5) under the cream paper (8) in a mandatory zone before the shaper (13) so that they necessarily pass through the latter.
  • the bonding of shims (5), previously prepared, under the cream paper (8) is, according to the method of the invention, a collage on the fly, continuously, and at a fast frequency.
  • the shims (5) are positioned perfectly centered and well perpendicular to the scroll of the cream paper (8).
  • the docking means used to glue these wedges (5) on the fly are such that the cream paper (8) undergoes no deviation or deformation detrimental to the smooth running of the production of gypsum board (44).
  • the method of the invention takes advantage of the means used to dock and glue wedges (5) the fly to roughen the cream paper (8) on both sides of the wedge (5). ) it can be stamping, knurling, pecking, brushing. Thus, the area corresponding to the future transverse thinned (17) will have a better grip on the grout, the mechanical strength of the joint between plasterboard (44) will be greatly improved.
  • the means for bonding the shims (5) on the fly to pre-mark the cream board (8) with two notch lines (11) which are light and parallel to each other. the wedge (5) and at a distance of between 5 and 9 cm from the axis of said wedge (5).
  • This pre-marking of the cream paper (8) in an area which will later be the beginning of transverse thinning (17), will improve the configuration and appearance, these notching lines (11) delimit the rough surface (12) .
  • the method according to the invention then consists in protecting the wedges (5) embarked by the cream paper (8) against the unwanted tearing associated with the apparatuses present between the mixer (1) and the shaper (13), it is suppressed or softened for this in this area all the attachment points and all the salient points (19).
  • a flexible, slippery and wear-resistant guide sheet (42) is applied, between the mixer (1) and the inlet of the shaper (13), this guide web (42) of width greater than the length of the wedges (5), is fixed upstream by a fastener (47) and then left free, this guide web (42) covers all the tools present in the area such as, the table (48), the beaters (18), the cream paper guides (8), without disrupt the effectiveness.
  • Said guide web (42) allows perfect sliding and crossing of shims (5) of the area between the mixer (1) and the shaper (13).
  • the method according to the invention then consists in allowing shims (5) to pass on the one hand the shaper (13) but also to wait for a sufficient time of hardening of the composite strip (45) so that the impression (20) left by the shims (5) side cream paper (8) of the composite strip (45) is permanent and final.
  • the method according to the invention then consists of taking off the shims (5) on the fly and then throw them in a trash can (43), this take-off is indifferently at a point where the curing time previously mentioned is sufficient. It is preferentially the zone (23) between the 2 curing strips (14) and (15) or just before the shears (2).
  • This takeoff consists of coming to remove the wedge (5) with a brush (22), which after removing the wedge (5), fades, so as not to alter the cream paper surface (8).
  • This brush (22) is wedged at an angle to the line and the brush (22) off the shims (5) more effectively.
  • the takeoff is all the easier as the cream paper (8) at this stage of the process becoming wet, it may be necessary energy to remove the wedge (5).
  • the takeoff of the shims (5) is done with jets of compressed air or by burning the shim (5) with suitable burners.
  • the shims (5) are not removed, they remain then stick to the composite strip (45), their low mechanical strength allows without problem a shear cut (2) to the right of the latter said wedges (5) then continue their circuit to be destroyed by sawing at the end of the line plates.
  • the method according to the invention makes it possible to weaken the wedge (5) in its main axis, it can be the flexible band (27) which is thus designed, it can also be a tool that weakens the flexible band (27) in its main axis when preparing holds (5).
  • the method according to the invention consists in the last phase, to cut the composite strip (45) with the shear (2) to the right of the imprints (20) left by the shim (5).
  • Imprints (20) of width between 10 and 18 cm, that is several times greater than the width of the shim (5).
  • the result, at this stage of the process according to the invention, is a gypsum board (44) with at its periphery four thinned edges, two traditional longitudinal thinned (16) and two transverse thinned (17) generated by the method according to the invention.
  • this plasterboard (44) then crosses the dryer, it is sawn to length, and then stacked before joining the stock.
  • the shear cut (2) occurs simultaneously in the cavities (20) and at equal distance from two cavities (20), the plates (44) thus produced have 3 thinned, two longitudinal thinned ( 16) a transverse thinned (17), these 3-thin plates are interesting for particular applications of the market.
  • the shape and the exact dimensions of the shim (5), the enachting lines (11), the machining of the aforementioned ends of the wedge (5) and the adjustment of the tension of the cream paper ( 8) make it possible to control the shape of the imprint (20) as well as its width between 10 and 18 cm, in fact these parameters all influence the shape and size of the imprint (20) left by the wedge (5).
  • the shims (5) are reduced to a single wire, or even two son of a few mm2 section.
  • These threads are either circular or square, the interest of the thread is that it is easily rolled and is very cheap, so the process will have single-wire wedges (52) and double-spaced wedges (55) .
  • the wedges (5) are extracted from a flexible band (27) always with a width of between 5 and 20 mm, but with a thickness reduced to some 1/10 mm, thus more economical and therefore more advantageous for the process.
  • a flexible band (27) always with a width of between 5 and 20 mm, but with a thickness reduced to some 1/10 mm, thus more economical and therefore more advantageous for the process.
  • the pin (58) locally repels the material of the flexible band (27), it takes a height (59), then artificially increasing the thickness of the flexible band (27), the method thus has a wedge (57) ) very economical.
  • the picot wedge (57) is tinged on one or more lengths. According to another variant of the process of the invention tingles the ends of the wedge (57) with a chosen depth and graduality, thus better controlling the configuration of the intersection zone of the transverse thinning (17) and the longitudinal thinning (16)
  • the wedges (5) are in any of the following materials: either paper, plastic, vegetable material, metal or composite material.
  • the shim (5) takes the form of one or two fusible plastic son son, the advantage of this means is to have a material that avoids the sizing phase of the wedge (5) is the wedge "two in one" (56).
  • the shim (5) is extracted from an easily consumable material, such as paper, so that shims (5) can be burned before shears (2) to subtract them from the composite strip ( 45), the other advantage of this variant is to avoid the landfill of the shims (5) after use.
  • the wedges (5) come from a roll (26) of adhesive tape which has the advantage of a good regularity of the gluing of the wedge (5) on the cream paper (8). ) and which exempts us from the glue maker (30) or (60)
  • a roller (26) of a flexible strip (27) of section about 1.5 x 10 mm This roller (26) motorized and relayed by the rollers (28) engages the flexible band (27) on the lower table (29) perpendicular to the flow direction of the cream paper (8). Said lower table (29) being below and away from the cream paper (8).
  • This flexible band (27) is covered, during its movement towards the lower table (29) of a very light film of glue (24) by the glue (30), this flexible band (27) is cut to length by the knife (31) and then becomes wedge (5).
  • This shim (5) is therefore positioned perpendicularly to the direction of unwinding of the cream paper (8) at a distance and under the latter and centered relative thereto by means of the rollers (28) and their associated positioning sensor.
  • the lower table (29) forming part of the translator gluing follower device (6) is launched at the same speed as the cream paper (8) by means of the carriage (70), said carriage (70) being driven by the transmission motor (33), itself associated with an electronics and the pulse sensor (32) .
  • the pulse sensor (32) fixed with respect to the translating glue follower device (6) permanently knows the position of the shims (5). ) with respect to cream paper (8).
  • the lower table (29) is then found at the same speed as the cream paper (8), at this very precise time the lower table (29) makes a movement up and down by means of the cylinders and guides (34) compressing and gluing the shim (5) under the cream paper (8), said cream paper (8) taking support on the compressible support plate (35) itself attached to the upper counter-table (36).
  • the hold (5) thus fixed on the fly is carried by the cream paper (8) without modifying or disrupting the movement.
  • the translator gluing follower device (6) in position "P2" when gluing the shim (5) then returns to its starting position "P1".
  • a new wedge positioning and gluing preparation cycle (5) resumes, a new shim (5) is glued in accordance with the previous wedge (5) a precise interval "P" and so on the cycle is repeated.
  • This interval "P” depends on the length of the plasterboard (44) sought, the longitudinal expansion of the composite strip (45) during its hardening on the curing strips, the over-length required for sawn timber drywall (44) at the line exit.
  • edges of the wedges (5) are rounded, their ends beveled and tapered.
  • the device associated with this variant of the method is a machining tool that is in line with the glue (30) and the knife (31) and which machines the flexible band (27) at the time of its passage and its engagement on the lower table (29).
  • a rough surface (12) and two encapsulation lines (11) are created on either side of the shim (5).
  • Figure 20 shows in more detail how this rough surface (12) and the notching lines (11) of the cream paper (8) on either side of the shim (5).
  • the tool associated with this variant of the method consists of the stamper (37) and counter-stamper (38) attached to the upper counter-table (36) which during the upward movement of the lower table (29) come slightly stamping so mark the cream paper (8).
  • the flexible band (27) of a thickness of some 1/10 mm used to make the shim (5) is tipped in one or more lines in its long direction.
  • the tool associated with this variant is an online tool with the gluing tool (30) and knife (31). This tool has a way of adjusting the pecking depth. This adjustable allows the control of the overall thickness or apparent of the flexible band (27) thus the depth of the transverse thinned (17) sought.
  • Both ends of the wedge (5) are tapered more strongly and gradually to improve the profile of the meeting point of the horizontal thinning (16) with the transverse thinning (17).
  • a rotary gluing follower device (7) provides, as the follower gluing apparatus (6), the functions of preparation, positioning and gluing at a precise interval of the shims (5) under the cream paper (8).
  • FIGS. 4 and 5 show this rotating gluing follower device (7), we discover in these FIGS.
  • the preparation, the positioning of the shims (5) on the lower roller (40) is similar to the preparation of the shims (5) of the translator gluing follower device (6).
  • the rounding of the wedge edges (5), their beveling and end tilting is also done in a similar way to the preparation of wedges (5) of the follower gluing apparatus (6).
  • the shim (5) is prepared, it is under and away from the cream paper (8) and at a rear angle (46) with said cream paper (8).
  • the lower roller (40) and the upper roller (41) driven by the transmission motor (39) adopt the same peripheral speed as the horizontal speed of the cream paper (8).
  • order is given to the cylinders and guides (64) drop and rises to the upper roller (41) thus sticking the shim (5) under the cream paper (8).
  • the wedge (5) thus fixed on the fly is carried by the cream paper (8) without modifying or disturbing the movement of the cream paper (8).
  • the stamper (67) and the stamper counter (68) lightly etch the cream paper (8) to obtain a rough surface (12) and two light necking lines (11), we have already mentioned it: the rough surface will coincide with the transverse thinning (17) and the notching lines (11) will coincide with the transverse thinning start line (17).
  • An alternative to the device according to the invention is to facilitate the passage of shims (5) and their sliding in the area between the mixer (1) and the shaper (13). It is a guide sheet (42) flexible, slippery and resistant to wear, this last quality of wear resistance is necessary because the guide web (42) sees the cream paper (8) and all the wedges (5). Said guide web (42) of width greater than the length of the wedges (5) is held by the fastener (47) upstream of the mixing zone (1) shaper (13), the guide web (42) is centered relative to the scrolling of the cream paper (8) so shims (5), the guide web (42) covers all areas of friction and possible hooking between the mixer (1) and the beginning shaper (13).
  • This guide web (42) covers the table (48), the drummers (18) the salient points (19), the cream paper guides (8) and then protects the wedges against any risk of untimely stall in this zone.
  • a last device takes off the shims (5) to reject them in a bin (43). It is a brush (22) that rotates continuously and is angled relative to the line. This brush is actuated by the jack (25) which raises said brush (22) only during the passage of shims (5).
  • the cylinder (25) is controlled by the cavity sensor (21) and its associated electronics which calculates the rise time as a function of the distance d1 between the cavity sensor (21) and the brush (22) and the speed "V" of the composite strip (45).
  • the cutting of the shears (2) to the right of the impression (20) left by the shim (5) is controlled by the fingerprint sensor (21) and associated electronics which take into account, on the one hand, the distances d2 between the impression detector (21) and the shear (2) and on the other hand the running speed "V" of the composite strip (45).

Abstract

A method for producing plaster plates ( 44 ), according to which two fine cardboard-covered sheets of paper ( 8, 9 ) enclose a plaster-based hydraulic binder ( 10 ) in a shaping device ( 13 ), creating a composite band ( 45 ) that is hardened on one or several hardening bands ( 14, 15 ), the edges of said hardening bands ( 14, 15 ) being provided with two bands used for tapering in the horizontal direction.

Description

La présente invention concerne un procédé et des dispositifs pour fabriquer des plaques de plâtre présentant 4 bords amincis sur leur périphérie.The present invention relates to a method and devices for manufacturing gypsum board having 4 thinned edges on their periphery.

Le secteur technique de l'invention est le domaine de la fabrication de plaques de plâtre en continu dans lequel deux feuilles de papier cartonnées, l'une inférieure appelée papier crème, l'autre supérieure appelée papier gris se déroulent et viennent enfermer dans un conformateur, qui est soit des plateaux de formage soit des rouleaux de formage, un liant hydraulique à base de plâtre.The technical field of the invention is the field of the manufacture of continuous plasterboard in which two sheets of cardboard, one lower called cream paper, the other upper called gray paper unwind and come to lock in a shaper which is either forming trays or forming rolls, a plaster based hydraulic binder.

Ces deux feuilles de papier cartonnées constituent avec ce liant hydraulique une bande composite qui durcit généralement sur deux bandes de durcissement, sur les bordures desquelles sont présentes deux petites bandes de réservation d'aminci permettant d'aménager des bords amincis longitudinaux à la future plaque.These two sheets of paperboard constitute with this hydraulic binder a composite strip which generally hardens on two curing strips, on the edges of which are present two small taper reservation strips for arranging longitudinal thinned edges to the future plate.

Cette bande composite est cisaillée à longueur voulue, elle passe dans un four de séchage, elle est enfin re-sciée à longueur définitive avant d'être empilée. Un tel procédé est bien connu par ailleurs et ne sera donc pas décrit en lui-même plus en détail dans la présente description.This composite strip is sheared to length, it goes into a drying oven, it is finally re-sawed to final length before being stacked. Such a method is well known elsewhere and therefore will not be described in itself in more detail in the present description.

L'intérêt des amincis tout autour de la plaque de plâtre est connu et apprécié depuis longtemps. En effet, ils facilitent l'aboutement et le jointoiement des plaques de plâtre et permettent de réaliser des ouvrages de grandes surfaces et présentant une parfaite planéité et une excellente résistance mécanique.The interest of thinning all around the plasterboard is known and appreciated for a long time. Indeed, they facilitate the abutment and grouting plasterboard and allow to achieve works of large areas and having a perfect flatness and excellent mechanical strength.

Il est connu depuis très longtemps, sur ces lignes de fabrication fonctionnant en continu, de produire des plaques de plâtre avec des bords amincis longitudinaux, mais aucun procédé ne permet de fabriquer sur ces lignes fonctionnant en continu des plaques de plâtre avec des amincis transversaux présentant les mêmes caractéristiques que les bords amincis longitudinaux.It has been known for a very long time, on these continuous production lines, to produce gypsum boards with longitudinal thinned edges, but no method makes it possible to manufacture on these lines operating continuously gypsum board with transverse thin sections presenting the same characteristics as the longitudinal thinned edges.

Il y a bien sûr eu de nombreuses tentatives et de nombreux brevets ont été pris et essentiellement des brevets américains pour tenter de résoudre ce problème de production en continu des amincis transversaux.
Le brevet US-A-2,168,803 décrit un procédé et un dispositif pour la fabrication de plaques de plâtre.
Le brevet US-A-2,238,017 en particulier tentait en 1941 de créer une surépaisseur par pliage du carton, cette invention n'a jamais donné de développement industriel, probablement parce que le pliage ne résistait pas à la tension du papier, ou au poids du liant hydraulique.
Le brevet US-A-2,991,825 tentait 20 ans plus tard de faire des empreintes dans un système de rouleaux de formage, il n'a pas non plus donné suite à un développement industriel, certainement parce que l'empreinte générée s'effaçait par écrasement sur la bande de durcissement.
Force est de reconnaître qu'aujourd'hui les plaques avec des amincis transversaux si elles existent sont, soit des usinages d'extrémités appelés dans le métier biseautage, soit des artifices comme un rainurage, pressage et collage du bord, soit plus fréquemment l'artisan qui rabote son bord de plaque pour y aménager un aminci transversal.There have of course been many attempts and many patents have been taken and essentially US patents to try to solve this problem of continuous production of transverse thinning.
US-A-2,168,803 discloses a method and a device for the manufacture of plasterboard.
US Pat. No. 2,238,017, in particular, attempted in 1941 to create a folding allowance for the carton, this invention never gave rise to industrial development, probably because the folding did not withstand the tension of the paper, or the weight of the paper. hydraulic binder.
US Pat. No. 2,991,825 attempted 20 years later to make impressions in a As a result of the roll-forming system, it has not been followed by industrial development, certainly because the generated impression is being erased by crushing the hardening strip.
It must be recognized that today the plates with transverse thinnesses if they exist are either end machining called in the beveling craft, or artifices such as grooving, pressing and gluing the edge, or more frequently the craftsman who plans his plate edge to build a transverse thinning.

Ces solutions sont toutes coûteuses à l'échelle du prix de revient de la plaque et de plus l'aminci est loin d'avoir les qualités de l'aminci longitudinal. Il y a aujourd'hui une vraie attente du marché et une vraie attente de l'industrie en ce qui concerne cette situation.These solutions are all expensive on the scale of the cost price of the plate and more thinned is far from having the qualities of longitudinal thinning. There is today a real expectation of the market and a real expectation of the industry regarding this situation.

Le procédé et ses dispositifs selon l'invention permettent de remédier à ces inconvénients.The method and its devices according to the invention make it possible to remedy these drawbacks.

Une solution au problème posé est décrit dans les revendications 1 et 7.A solution to the problem is described in claims 1 and 7.

Le résultat est un nouveau procédé et dispositifs de fabrication répondant bien au problème posé, les amincis transversaux résultant des empreintes ont des qualités d'aspect de surface, de forme et de résistance identiques aux amincis longitudinaux et sont bien fabriqués suivant un processus continu qui s'avère être d'un coût très faible et très intéressant pour les industriels et le marché de la plaque de plâtre.The result is a new process and manufacturing devices that respond well to the problem posed, the transverse thinning resulting from fingerprints have qualities of surface appearance, shape and strength identical to longitudinal thinning and are well manufactured in a continuous process which proves to be very low cost and very interesting for the industrial and the plasterboard market.

La description et les figures ci après représentent un exemple de fabrication de plaques cartonnées à base de plâtre montrant les avantages particuliers de l'invention tels que ceux cités précédemment, mais n'ont aucun caractère limitatif : d'autres fabrication sont possibles dans le cadre de la portée et de l'étendue de l'invention, en particulier la fabrication de plaques de plâtre utilisant des papiers à base minérale ou des mats de verre à la place des papiers cartonnés ou encore plus généralement la fabrication de plaques utilisant deux feuilles ou une enveloppe quelle qu'en soit la nature enfermant après passage dans un conformateur, un liant hydraulique à prise ou à séchage.

  • La figure 1a représente la tête de ligne de fabrication dans laquelle intervient le nouveau procédé de l'invention
  • La figure 1b représente une plaque avec 4 bords amincis fabriquée selon l'invention.
  • La figure 2 représente le dispositif selon l'invention de préparation, positionnement et collage des cales sur le papier crème.
  • La figure 3 représente la vue suivant F du dispositif de la figure 2.
  • La figure 4 représente une variante du dispositif selon l'invention de préparation, positionnement et collage des cales sur le papier crème.
  • La figure 5 représente la vue suivant F du dispositif de la figure 4.
  • La figure 6 représente le dispositif selon l'invention du décollage des cales et de coupe de la bande composite.
  • La figure 7 représente la cale collée sous le papier crème selon l'invention.
  • La figure 8 représente la cale collée de la figure 7 après passage dans le conformateur selon l'invention.
  • La figure 9 représente selon l'invention une 1ère variante de cale collée sous le papier crème.
  • La figure 10 représente la cale collée de la figure 9 après passage dans le conformateur.
  • La figure 11 représente selon l'invention une 2 ème variante de cale collée sous le papier crème.
  • La figure12 représente la cale collée de la figure 11 après passage dans le conformateur.
  • La figure 13 représente selon l'invention une 3 ème variante de cale collée sous le papier crème.
  • La figure 14 représente la cale collée de la figure 13 après passage dans le conformateur.
  • La figure 15 représente selon l'invention une 4 ème variante de cale 5.
  • La figure 16 représente selon l'invention une 5 ème variante de cale collée sous le papier crème.
  • La figure 17 représente la cale collée de la figure 16 après passage dans le conformateur.
  • La figure 18 représente selon l'invention une 6 ème variante de cale collée sous le papier crème.
  • La figure 19 représente la cale collée de la figure 18 après passage dans le conformateur.
  • La figure 20 représente le papier crème vue de dessous après collage de la cale et estampage dudit papier selon l'invention.
  • La figure 21 représente selon l'invention une 7 eme variante de cale collée sous le papier crème.
  • La figure 22 représente la cale collée de la figure 21 après passage dans le conformateur.
The description and the figures below represent an example of manufacture of gypsum board plates showing the particular advantages of the invention such as those mentioned above, but have no limiting character: other manufacturing is possible in the context of the invention. the scope and scope of the invention, in particular the manufacture of plasterboard using mineral-based papers or glass mats instead of paperboard or more generally the manufacture of plates using two sheets or an envelope whatever the nature enclosing after passing through a shaper, a hydraulic binder set or drying.
  • FIG. 1a represents the manufacturing line head in which the new method of the invention is involved.
  • Figure 1b shows a plate with four thinned edges manufactured according to the invention.
  • FIG. 2 represents the device according to the invention for preparing, positioning and gluing the shims on the cream paper.
  • FIG. 3 represents the following view F of the device of FIG. 2.
  • Figure 4 shows a variant of the device according to the invention for preparing, positioning and bonding the wedges on the cream paper.
  • FIG. 5 represents the following view F of the device of FIG. 4.
  • Figure 6 shows the device according to the invention of the takeoff of shims and cutting the composite strip.
  • Figure 7 shows the wedge glued under the cream paper according to the invention.
  • FIG. 8 represents the glued shim of FIG. 7 after passing through the shaper according to the invention.
  • FIG. 9 represents, according to the invention, a first variant of wedge glued under the cream paper.
  • Figure 10 shows the glued shim of Figure 9 after passing through the shaper.
  • FIG. 11 represents, according to the invention, a second variant of wedge glued under the cream paper.
  • Figure 12 shows the glued shim of Figure 11 after passing through the shaper.
  • FIG. 13 represents, according to the invention, a third variant of wedge glued under the cream paper.
  • Figure 14 shows the glued shim of Figure 13 after passing through the shaper.
  • FIG. 15 represents, according to the invention, a 4th variant of shim 5.
  • FIG. 16 represents, according to the invention, a fifth variant of wedge glued under the cream paper.
  • Figure 17 shows the glued shim of Figure 16 after passing through the shaper.
  • FIG. 18 represents, according to the invention, a sixth variant of wedge glued under the cream paper.
  • Figure 19 shows the glued shim of Figure 18 after passing through the shaper.
  • Figure 20 shows the cream paper seen from below after gluing the wedge and stamping said paper according to the invention.
  • Figure 21 shows according to the invention a 7th variant of wedge glued under the cream paper.
  • Figure 22 shows the glued shim of Figure 21 after passing through the shaper.

Le procédé selon l'invention consiste tout d'abord à préparer en continu à une cadence rapide des cales (5). Ces cales (5) sont extraites d'un matériau expansible, souple, léger, bon marché. Ces cales (5) ont une épaisseur comprise entre 1 et 2 mm et une largeur comprise entre 5 et 20 mm et une longueur égale à la largeur de plaque en cours de production moins une valeur comprise entre 0 et 10 cm.The process according to the invention consists first of all in continuously preparing shims (5) at a rapid rate. These shims (5) are extracted from an expandable, flexible, lightweight, inexpensive material. These shims (5) have a thickness of between 1 and 2 mm and a width of between 5 and 20 mm and a length equal to the plate width being produced minus a value of between 0 and 10 cm.

Selon l'invention ces cales (5) seront extraites d'un rouleau (26) de bande souple (27), coupées à longueur et encollées sur leur face supérieure.According to the invention these shims (5) will be extracted from a roll (26) of flexible tape (27), cut to length and glued on their upper face.

Selon une variante du procédé de l'invention les cales (5) sont dans un matériau ayant la même expansion à l'humidité que le papier crème (8) sur lequel elle se trouve fixée. C'est par exemple une cale (5) en papier de même nature que le papier crème (8), ce afin que la bande composite (45) puisse s'expanser librement et sans être retenue par la cale (5) lors de son durcissement.According to a variant of the method of the invention the wedges (5) are in a material having the same expansion to moisture as the cream paper (8) on which it is fixed. It is for example a wedge (5) of paper of the same nature as the cream paper (8), so that the composite strip (45) can expand freely and without being held by the wedge (5) during its hardening.

Selon une autre variante du procédé de l'invention ces cales (5) subissent quelques usinages pour en améliorer l'usage comme :

  • une coupe profilée ou en biais des extrémités de la cale (5) pour maîtriser la future configuration des extrémités de l'aminci transversal (17).
  • un amincissement des extrémités pour améliorer également la future configuration des extrémités de l'aminci transversal (17).
  • l'abattage ou l'arrondi de l'arête de la bande (27) pour donner la cale arrondie (51) moins propice à se faire accrocher dans son futur mouvement dans la zone mélangeur (1) conformateur (13).
According to another variant of the method of the invention these shims (5) undergo some machining to improve its use as:
  • a sectional cut or angled ends of the wedge (5) to control the future configuration of the ends of the transverse thinned (17).
  • a thinning of the ends to also improve the future configuration of the ends of the transverse thinned (17).
  • felling or rounding the edge of the strip (27) to give the rounded shim (51) less conducive to being caught in its future motion in the mixing zone (1) shaper (13).

Le procédé selon l'invention consiste ensuite à coller ces cales (5) sous le papier crème (8) dans une zone obligatoirement avant le conformateur (13) afin qu'elles traversent obligatoirement ce dernier. La zone retenue si elle est nécessairement avant le conformateur (13), à savoir, ou bien entre le mélangeur (1) et le conformateur (13), ou encore, entre le mélangeur (1) et le rouleau de papier crème (8), est préférentiellement selon l'invention juste avant le mélangeur (1).The method according to the invention then consists of sticking these shims (5) under the cream paper (8) in a mandatory zone before the shaper (13) so that they necessarily pass through the latter. The area retained if it is necessarily before the shaper (13), namely, between the mixer (1) and the shaper (13), or between the mixer (1) and the cream paper roll (8) , is preferably according to the invention just before the mixer (1).

Le collage des cales (5), précédemment préparées, sous le papier crème (8) est, suivant le procédé de l'invention, un collage à la volée, en continu, et à fréquence rapide. Les cales (5) sont positionnées parfaitement bien centrées et bien perpendiculaires au défilement du papier crème (8).The bonding of shims (5), previously prepared, under the cream paper (8) is, according to the method of the invention, a collage on the fly, continuously, and at a fast frequency. The shims (5) are positioned perfectly centered and well perpendicular to the scroll of the cream paper (8).

Elles sont fixés au papier crème (8) suivant un pas calculé et dépendant de l'expansion longitudinale de la bande composite (45) lors de son durcissement, de la longueur finale de la plaque de plâtre (44) sèche attendue et de la sur longueur nécessaire au sciage des plaques de plâtre (44) en sortie ligne, ce calcul est bien connu des hommes de l'art.They are attached to the cream paper (8) in a calculated step and depending on the longitudinal expansion of the composite strip (45) during its hardening, the final length of the dry plasterboard (44) expected and the on length necessary to saw plasterboard (44) line output, this calculation is well known to those skilled in the art.

Les moyens d'accostage mis en oeuvre pour coller ces cales (5) à la volée sont tels que le papier crème (8) ne subit aucune déviation, ni aucune déformation préjudiciable au bon déroulement de la production des plaques de plâtre (44).The docking means used to glue these wedges (5) on the fly are such that the cream paper (8) undergoes no deviation or deformation detrimental to the smooth running of the production of gypsum board (44).

Selon l'invention le procédé retenu pour coller les cales (5) est le collage, les paramètres de collage sont contrôlés afin que la cale (5) fixée au papier crème (8) par collage ne perturbe pas l'expansion de ce dernier au droit de ce collage, ces paramètres de réglage sont :

  • le choix de collage par enduction ou projection,
  • la quantité de colle (24) déposée et la répartition de ladite colle (24) sur la cale (5),
  • la discontinuité ou au contraire la continuité du film colle (24) sur la cale (5).
  • les caractéristiques d'élasticité et de tac de la colle (24).
According to the invention, the method used to glue the wedges (5) is gluing, the gluing parameters are controlled so that the spacer (5) fixed to the cream paper (8) by gluing does not disturb the expansion of the latter at right of this collage, these Setting parameters are:
  • the choice of gluing by coating or projection,
  • the amount of adhesive (24) deposited and the distribution of said adhesive (24) on the shim (5),
  • the discontinuity or, on the contrary, the continuity of the adhesive film (24) on the shim (5).
  • the elasticity and tack characteristics of the glue (24).

Selon une variante du procédé de l'invention, on profite du moyen mis en oeuvre d'accostage et de collage des cales (5) la volée pour rendre rugueux le papier crème (8) de part et d'autre de la cale (5) ce peut être de l'estampage, du moletage, du picotage, du brossage. Ainsi, la zone correspondant au futur aminci transversal (17) présentera une meilleure accroche à l'enduit de jointoiement, la tenue mécanique du joint de liaison entre plaques de plâtre (44) sera alors grandement améliorée.According to a variant of the method of the invention, it takes advantage of the means used to dock and glue wedges (5) the fly to roughen the cream paper (8) on both sides of the wedge (5). ) it can be stamping, knurling, pecking, brushing. Thus, the area corresponding to the future transverse thinned (17) will have a better grip on the grout, the mechanical strength of the joint between plasterboard (44) will be greatly improved.

Selon une variante du procédé de l'invention, on profite également du moyen mis en oeuvre de collage des cales (5) à la volée pour pré marquer le carton crème (8) de deux lignes d'encochage (11) légères et parallèles à la cale (5) et à une distance comprise entre 5 et 9 cm de l'axe de ladite cale (5). Ce pré marquage du papier crème (8) dans une zone qui sera plus tard le début d'aminci transversal (17), en améliorera la configuration et l'aspect, ces lignes d'encochage (11) délimitent la surface rugueuse (12).According to a variant of the process of the invention, it is also advantageous to use the means for bonding the shims (5) on the fly to pre-mark the cream board (8) with two notch lines (11) which are light and parallel to each other. the wedge (5) and at a distance of between 5 and 9 cm from the axis of said wedge (5). This pre-marking of the cream paper (8) in an area which will later be the beginning of transverse thinning (17), will improve the configuration and appearance, these notching lines (11) delimit the rough surface (12) .

Le procédé selon l'invention consiste ensuite à protéger les cales (5) embarquées par le papier crème (8) contre les arrachages intempestifs liés aux appareils présents entre le mélangeur (1) et le conformateur (13), on supprime ou on adoucit pour cela dans cette zone tous les points d'accrochage et tous les points saillants (19).The method according to the invention then consists in protecting the wedges (5) embarked by the cream paper (8) against the unwanted tearing associated with the apparatuses present between the mixer (1) and the shaper (13), it is suppressed or softened for this in this area all the attachment points and all the salient points (19).

Selon une variante du procédé de l'invention, pour faciliter le passage des cales (5) dans la zone entre le mélangeur et le conformateur (13), on pose une nappe guide (42) souple, glissante et résistante à l'usure, entre le mélangeur (1) et l'entrée du conformateur (13), cette nappe guide (42) de largeur supérieure à la longueur des cales (5), est fixée en son amont par une fixation (47) et ensuite laissée libre, cette nappe guide (42) recouvre tous les outils présents dans la zone comme, la table (48), les batteurs (18), les guides papier crème (8), sans en perturber l'efficacité. Ladite nappe guide (42) permet le parfait glissement et franchissement des cales (5) de la zone située entre le mélangeur (1) et le conformateur (13).According to a variant of the method of the invention, to facilitate the passage of the shims (5) in the zone between the mixer and the shaper (13), a flexible, slippery and wear-resistant guide sheet (42) is applied, between the mixer (1) and the inlet of the shaper (13), this guide web (42) of width greater than the length of the wedges (5), is fixed upstream by a fastener (47) and then left free, this guide web (42) covers all the tools present in the area such as, the table (48), the beaters (18), the cream paper guides (8), without disrupt the effectiveness. Said guide web (42) allows perfect sliding and crossing of shims (5) of the area between the mixer (1) and the shaper (13).

Le procédé selon l'invention consiste alors à laisser les cales (5) franchir d'une part le conformateur (13) mais aussi d'attendre un temps suffisant de durcissement de la bande composite (45) afin que l'empreinte (20) laissée par les cales (5) coté papier crème (8) de la bande composite (45) soit rémanente et définitive.The method according to the invention then consists in allowing shims (5) to pass on the one hand the shaper (13) but also to wait for a sufficient time of hardening of the composite strip (45) so that the impression (20) left by the shims (5) side cream paper (8) of the composite strip (45) is permanent and final.

Le procédé selon l'invention consiste alors à décoller les cales (5) à la volée et les jeter alors dans une poubelle (43), ce décollage se fait indifféremment en un point où le temps de durcissement précédemment évoqué est suffisant. C'est préférentiellement la zone (23) entre les 2 bandes de durcissement (14) et (15) ou bien juste avant la cisaille (2).The method according to the invention then consists of taking off the shims (5) on the fly and then throw them in a trash can (43), this take-off is indifferently at a point where the curing time previously mentioned is sufficient. It is preferentially the zone (23) between the 2 curing strips (14) and (15) or just before the shears (2).

Ce décollage consiste à venir enlever la cale (5) avec une brosse (22), qui après avoir enlevé la cale (5), s'efface, pour ne pas altérer la surface papier crème (8). Cette brosse (22) est calée en biais par rapport à la ligne ainsi la brosse (22) décolle les cales (5) plus efficacement. Le décollage est d'autant plus facile que le papier crème (8) à ce stade du procédé devenant humide, il faut peut d'énergie pour enlever la cale (5).This takeoff consists of coming to remove the wedge (5) with a brush (22), which after removing the wedge (5), fades, so as not to alter the cream paper surface (8). This brush (22) is wedged at an angle to the line and the brush (22) off the shims (5) more effectively. The takeoff is all the easier as the cream paper (8) at this stage of the process becoming wet, it may be necessary energy to remove the wedge (5).

Selon une variante du procédé de l'invention, le décollage des cales (5) se fait avec des jets d'air comprimé ou encore en en brûlant la cale (5) avec des brûleurs adaptés.According to a variant of the method of the invention, the takeoff of the shims (5) is done with jets of compressed air or by burning the shim (5) with suitable burners.

Selon une variante du procédé de l'invention, on ne retire pas les cales (5), elles restent alors coller à la bande composite (45), leur faible résistance mécanique autorise sans problème une coupe cisaille (2) au droit de ces dernières, lesdites cales (5) continuent alors leur circuit pour être détruites par le sciage en fin de ligne plaques. Cependant le procédé selon l'invention prévoit de fragiliser la cale (5) en son axe principal, ce peut être la bande souple (27) qui est ainsi conçue, ce peut être aussi un outil qui fragilise la bande souple (27) en son axe principal lors de la préparation des cales (5).According to a variant of the method of the invention, the shims (5) are not removed, they remain then stick to the composite strip (45), their low mechanical strength allows without problem a shear cut (2) to the right of the latter said wedges (5) then continue their circuit to be destroyed by sawing at the end of the line plates. However, the method according to the invention makes it possible to weaken the wedge (5) in its main axis, it can be the flexible band (27) which is thus designed, it can also be a tool that weakens the flexible band (27) in its main axis when preparing holds (5).

Le procédé selon l'invention consiste en dernière phase, à couper la bande composite (45) avec la cisaille (2) au droit des empreintes (20) laissées par la cale (5). Empreintes (20) de largeur comprise entre 10 et 18 cm, soit plusieurs fois supérieure à la largeur de la cale (5).The method according to the invention consists in the last phase, to cut the composite strip (45) with the shear (2) to the right of the imprints (20) left by the shim (5). Imprints (20) of width between 10 and 18 cm, that is several times greater than the width of the shim (5).

Le résultat, à ce stade du procédé selon l'invention, est une plaque de plâtre (44) avec à sa périphérie 4 bords amincis, deux amincis longitudinaux (16) traditionnels et deux amincis transversaux (17) générés par le procédé selon l'invention, cette plaque de plâtre (44) franchit ensuite le séchoir, elle est sciée à longueur, puis empilée avant de rejoindre le stock.The result, at this stage of the process according to the invention, is a gypsum board (44) with at its periphery four thinned edges, two traditional longitudinal thinned (16) and two transverse thinned (17) generated by the method according to the invention. invention, this plasterboard (44) then crosses the dryer, it is sawn to length, and then stacked before joining the stock.

Selon une variante du procédé de l'invention, la coupe cisaille (2) intervient simultanément dans les empreintes (20) et à distance égale de deux empreintes (20), les plaques (44) ainsi produites présentent 3 amincis, deux amincis longitudinaux (16) un aminci transversal (17), ces plaques à 3 amincis sont intéressantes pour des applications particulières du marché.According to a variant of the method of the invention, the shear cut (2) occurs simultaneously in the cavities (20) and at equal distance from two cavities (20), the plates (44) thus produced have 3 thinned, two longitudinal thinned ( 16) a transverse thinned (17), these 3-thin plates are interesting for particular applications of the market.

Selon l'invention, la forme et les dimensions exactes de la cale (5), les lignes d'éncochage (11), les usinages d'extrémités précédemment évoqués de la cale (5) et le réglage de la tension du papier crème (8) permettent de contrôler la forme de l'empreinte (20) ainsi que sa largeur entre 10 et 18 cm, en effet ces paramètres influencent tous la forme et dimension l'empreinte (20) laissée par la cale (5).According to the invention, the shape and the exact dimensions of the shim (5), the enachting lines (11), the machining of the aforementioned ends of the wedge (5) and the adjustment of the tension of the cream paper ( 8) make it possible to control the shape of the imprint (20) as well as its width between 10 and 18 cm, in fact these parameters all influence the shape and size of the imprint (20) left by the wedge (5).

Selon une variante du procédé de l'invention, les cales (5) sont réduites à un simple fil, voire deux fils de quelques mm2 de section. Ces fils sont ou circulaires ou carrés, l'intérêt du fil est qu'il se met facilement en rouleau et qu'il est très bon marché, ainsi le procédé disposera de cales mono fil (52) et de cales doubles fils (55).According to a variant of the method of the invention, the shims (5) are reduced to a single wire, or even two son of a few mm2 section. These threads are either circular or square, the interest of the thread is that it is easily rolled and is very cheap, so the process will have single-wire wedges (52) and double-spaced wedges (55) .

Selon une variante du procédé de l'invention, les cales (5) sont extraites d'une bande souple (27) toujours de largeur comprise entre 5 et 20 mm, mais d'une épaisseur réduite à quelques 1/10 mm donc plus économique et donc plus avantageux pour le procédé. Pour augmenter artificiellement l'épaisseur de la cale (5) taillée dans la cette bande souple (27) plus fine, ce qui est nécessaire au procédé de l'invention, on picote celle-ci sur sa longueur par au moins une rangée de pointillés. Le picot (58) repousse localement la matière de la bande souple (27), il prend une hauteur (59), augmentant alors artificiellement l'épaisseur de la bande souple (27), le procédé dispose ainsi d'une cale picotée (57) très économique.According to a variant of the method of the invention, the wedges (5) are extracted from a flexible band (27) always with a width of between 5 and 20 mm, but with a thickness reduced to some 1/10 mm, thus more economical and therefore more advantageous for the process. To artificially increase the thickness of the shim (5) cut in the thinner (27), which is necessary for the method of the invention, it is tinged along its length by at least one row of dots . The pin (58) locally repels the material of the flexible band (27), it takes a height (59), then artificially increasing the thickness of the flexible band (27), the method thus has a wedge (57) ) very economical.

Selon une variante du procédé de l'invention, on picote la cale picotée (57) sur une ou plusieurs longueurs. Selon une autre variante du procédé de l'invention on picote les extrémités de la cale picotée (57) avec une profondeur et une progressivité choisie, ainsi on maîtrise mieux la configuration de la zone d'intersection de l'aminci transversal (17) et de l'aminci longitudinal (16)According to a variant of the method of the invention, the picot wedge (57) is tinged on one or more lengths. According to another variant of the process of the invention tingles the ends of the wedge (57) with a chosen depth and graduality, thus better controlling the configuration of the intersection zone of the transverse thinning (17) and the longitudinal thinning (16)

Selon le procédé de l'invention, les cales (5) sont dans l'un quelconque des matériaux suivants : soit en papier, soit en matière plastique, soit en matière végétale, soit en métal, soit en matériau composite.According to the process of the invention, the wedges (5) are in any of the following materials: either paper, plastic, vegetable material, metal or composite material.

Selon une variante du procédé de l'invention, la cale (5) prend la forme d'un ou deux fils de plastique thermocollants, l'avantage de ce moyen est de disposer d'un matériau qui nous évite la phase d'encollage de la cale (5) c'est la cale "deux en un " (56).According to a variant of the process of the invention, the shim (5) takes the form of one or two fusible plastic son son, the advantage of this means is to have a material that avoids the sizing phase of the wedge (5) is the wedge "two in one" (56).

Selon une variante du procédé de l'invention, la cale (5) est extraite d'un matériau facilement consumable, comme du papier, ainsi on peut brûler les cales (5) avant cisaille (2) pour les soustraire à la bande composite (45), l'autre avantage de cette variante est d'éviter la mise en décharge des cales (5) après utilisation.According to a variant of the method of the invention, the shim (5) is extracted from an easily consumable material, such as paper, so that shims (5) can be burned before shears (2) to subtract them from the composite strip ( 45), the other advantage of this variant is to avoid the landfill of the shims (5) after use.

Selon une variante du procédé de l'invention, les cales (5) proviennent d'un rouleau (26) de bande autocollante qui présente l'avantage d'une bonne régularité du collage de la cale (5) sur le papier crème (8) et qui nous dispense de l'encolleur (30) ou (60)According to a variant of the method of the invention, the wedges (5) come from a roll (26) of adhesive tape which has the advantage of a good regularity of the gluing of the wedge (5) on the cream paper (8). ) and which exempts us from the glue maker (30) or (60)

Selon enfin une dernière variante du procédé de l'invention on profite d'avoir accosté le papier crème (8) avec soit l'appareil suiveur colleur translateur (6) soit l'appareil suiveur colleur rotatif (7) pour marquer les amincis transversaux avec un système jet d'encre. Ainsi, on peut mettre en évidence et mieux faire connaître ce nouvel aminci transversal (17).Finally, according to a last variant of the method of the invention, it is advantageous to have accosted the cream paper (8) with either the follower gluing apparatus (6) or the follower apparatus rotary glue (7) to mark the transverse thin with an inkjet system. Thus, we can highlight and make better known this new transverse thinning (17).

Le premier dispositif dénommé appareil suiveur colleur translateur (6) associé au procédé selon l'invention apparaissant dans l'encadré (3) fig 1a et qui est détaillé dans les fig 2 et fig 3 procède à toutes les phases depuis la préparation des cales (5) jusqu'à leur collage sous le papier crème (8).The first device referred to as the translating gluing follower apparatus (6) associated with the method according to the invention appearing in the box (3) in FIG. 1a and which is detailed in FIGS. 2 and 3, proceeds to all phases since the preparation of the shims (FIG. 5) until they are glued under the cream paper (8).

Au début de ce procédé selon l'invention, se trouve un rouleau (26) d'une bande souple (27) de section environ 1,5 x 10 mm. Ce rouleau (26) motorisé et relayé par les roulettes (28) engage la bande souple (27) sur la table inférieure (29) perpendiculairement au sens de déroulement du papier crème (8). Ladite table inférieure (29) étant en dessous et à distance du papier crème (8). Cette bande souple (27) est recouverte, lors de son mouvement vers la table inférieure (29) d'un très léger film de colle (24) par l'encolleur (30), cette bande souple (27) est coupée à longueur par le couteau (31) et devient alors cale (5). Cette cale (5) se retrouve donc positionnée perpendiculairement au sens de déroulement du papier crème (8) à distance et sous ce dernier et centrée par rapport à celui-ci au moyen des roulettes (28) et de leur détecteur de positionnement associé.At the beginning of this method according to the invention is a roller (26) of a flexible strip (27) of section about 1.5 x 10 mm. This roller (26) motorized and relayed by the rollers (28) engages the flexible band (27) on the lower table (29) perpendicular to the flow direction of the cream paper (8). Said lower table (29) being below and away from the cream paper (8). This flexible band (27) is covered, during its movement towards the lower table (29) of a very light film of glue (24) by the glue (30), this flexible band (27) is cut to length by the knife (31) and then becomes wedge (5). This shim (5) is therefore positioned perpendicularly to the direction of unwinding of the cream paper (8) at a distance and under the latter and centered relative thereto by means of the rollers (28) and their associated positioning sensor.

La table inférieure (29) faisant partie de l'appareil suiveur colleur translateur (6) est lancée à la même vitesse que le papier crème (8) au moyen du chariot (70), ledit chariot (70) étant mu par la motorisation transmission (33), elle-même associée à une électronique et au capteur d'impulsions (32).Le capteur à impulsions (32) fixe par rapport à l'appareil suiveur colleur translateur (6) connaît en permanence la position des cales (5) par rapport au papier crème (8). La table inférieure (29) se retrouve alors à la même vitesse que le papier crème (8), à ce moment très précis la table inférieure (29) fait un mouvement de monte et baisse au moyen des vérins et guides (34) comprimant et collant la cale (5) sous le papier crème (8), ledit papier crème (8) prenant lui appui sur la plaque d'appui compressible (35) elle-même fixée sur la contre-table supérieure (36). La cale (5) ainsi fixée à la volée est emportée par le papier crème (8) sans en avoir modifié ou perturbé le mouvement. L'appareil suiveur colleur translateur (6) en position "P2" lors du collage de la cale (5) revient alors à sa position de départ "P1 ". Un nouveau cycle de préparation positionnement et collage de cale (5) reprend, une nouvelle cale (5) est collée en respectant avec la précédente cale (5) un intervalle précis " P " et ainsi de suite le cycle se répète.The lower table (29) forming part of the translator gluing follower device (6) is launched at the same speed as the cream paper (8) by means of the carriage (70), said carriage (70) being driven by the transmission motor (33), itself associated with an electronics and the pulse sensor (32) .The pulse sensor (32) fixed with respect to the translating glue follower device (6) permanently knows the position of the shims (5). ) with respect to cream paper (8). The lower table (29) is then found at the same speed as the cream paper (8), at this very precise time the lower table (29) makes a movement up and down by means of the cylinders and guides (34) compressing and gluing the shim (5) under the cream paper (8), said cream paper (8) taking support on the compressible support plate (35) itself attached to the upper counter-table (36). The hold (5) thus fixed on the fly is carried by the cream paper (8) without modifying or disrupting the movement. The translator gluing follower device (6) in position "P2" when gluing the shim (5) then returns to its starting position "P1". A new wedge positioning and gluing preparation cycle (5) resumes, a new shim (5) is glued in accordance with the previous wedge (5) a precise interval "P" and so on the cycle is repeated.

Cet intervalle " P ", dépend de la longueur de la plaque de plâtre (44) recherchée, de l'expansion longitudinale de la bande composite (45) lors de son durcissement sur les bandes de durcissement, de la sur-longueur nécessaire aux sciages des plaques de plâtre (44) en sortie ligne. Un intervalle que les hommes du métier savent très bien calculer et qui est assuré au moyen du capteur à impulsions (32), d'une électronique adaptée et de la motorisation transmission (33).This interval "P" depends on the length of the plasterboard (44) sought, the longitudinal expansion of the composite strip (45) during its hardening on the curing strips, the over-length required for sawn timber drywall (44) at the line exit. An interval that those skilled in the art know very well and which is provided by means of the pulse sensor (32), a suitable electronics and transmission engine (33).

Selon une variante du procédé de l'invention les arêtes des cales (5) sont arrondies, leurs extrémités biseautées et effilées. Le dispositif associé à cette variante du procédé est un outil d'usinage qui est en ligne avec l'encolleur (30) et le couteau (31) et qui usine la bande souple (27) au moment de son passage et de son engagement sur la table inférieure (29) .According to a variant of the method of the invention the edges of the wedges (5) are rounded, their ends beveled and tapered. The device associated with this variant of the method is a machining tool that is in line with the glue (30) and the knife (31) and which machines the flexible band (27) at the time of its passage and its engagement on the lower table (29).

Selon une variante du procédé de l'invention, on crée une surface rugueuse (12) et deux lignes d'encochages (11) de part et d'autre de la cale (5). La figure 20 montre plus en détail comment se présentent cette surface rugueuse (12) et les lignes d'encochage (11) du papier crème (8) de part et d'autre de la cale (5). L'outil associé à cette variante du procédé est constitué de l'estampeur (37) et du contre-estampeur (38) fixés à la contre-table supérieure (36) qui lors du mouvement de montée de la table inférieure (29) viennent légèrement estamper donc marquer le papier crème (8).According to a variant of the method of the invention, a rough surface (12) and two encapsulation lines (11) are created on either side of the shim (5). Figure 20 shows in more detail how this rough surface (12) and the notching lines (11) of the cream paper (8) on either side of the shim (5). The tool associated with this variant of the method consists of the stamper (37) and counter-stamper (38) attached to the upper counter-table (36) which during the upward movement of the lower table (29) come slightly stamping so mark the cream paper (8).

Selon une variante du procédé de l'invention la bande souple (27) d'une épaisseur de quelques 1/10 mm utilisée pour fabriquer la cale (5) est picotée en une ou plusieurs lignes dans son sens long. L'outil associé à cette variante est un outil en ligne avec les outils encolleur (30) et couteau (31). Cet outil dispose d'un moyen de réglage de la profondeur de picotage. Ce réglable autorise le contrôle de l'épaisseur hors tout ou apparente de la bande souple (27) donc de la profondeur de l'aminci transversal (17) recherché. Les deux extrémités de la cale (5) sont picotées plus fortement et de façon progressive pour améliorer le profil du point de rencontre de l'aminci horizontal (16) avec l'aminci transversal (17).According to a variant of the method of the invention the flexible band (27) of a thickness of some 1/10 mm used to make the shim (5) is tipped in one or more lines in its long direction. The tool associated with this variant is an online tool with the gluing tool (30) and knife (31). This tool has a way of adjusting the pecking depth. This adjustable allows the control of the overall thickness or apparent of the flexible band (27) thus the depth of the transverse thinned (17) sought. Both ends of the wedge (5) are tapered more strongly and gradually to improve the profile of the meeting point of the horizontal thinning (16) with the transverse thinning (17).

Selon une variante de l'invention, un appareil suiveur colleur rotatif (7) assure comme l'appareil suiveur colleur translateur (6) les fonctions de préparation, de positionnement, de collage suivant un intervalle précis des cales (5) sous le papier crème (8). Les figures 4 et 5 représentent cet appareil suiveur colleur rotatif (7), on découvre sur ces figures 4 et 5 le rouleau inférieur (40) et le rouleau supérieur (41), on reconnaît sur cet appareil suiveur colleur rotatif (7) le même appareillage que sur l'appareil suiveur colleur translateur (6) à savoir : le rouleau (66), la bande souple (63), les roulettes (71), l'encolleur (60), le couteau (61), le capteur à impulsions (69), les vérins et guides (64), la plaque d'appui compressible (65), l'estampeurs (67) et le contre-estampeur (68).According to a variant of the invention, a rotary gluing follower device (7) provides, as the follower gluing apparatus (6), the functions of preparation, positioning and gluing at a precise interval of the shims (5) under the cream paper (8). FIGS. 4 and 5 show this rotating gluing follower device (7), we discover in these FIGS. 4 and 5 the lower roll (40) and the upper roll (41), it is possible to recognize on this rotary gluing follower apparatus (7) the same apparatus only on the follower apparatus gluing translator (6) namely: the roller (66), the flexible band (63), the rollers (71), the glue (60), the knife (61), the sensor impulses (69), the cylinders and guides (64), the compressible support plate (65), the stamper (67) and the counter-stamper (68).

La préparation, le positionnement des cales (5) sur le rouleau inférieur (40) se fait de façon analogue à la préparation des cales (5) de l'appareil suiveur colleur translateur (6). L'arrondi des arêtes de cales (5), leur biseautage et effilage d'extrémité se fait également de façon analogue à la préparation des cales (5) de l'appareil suiveur colleur translateur (6).The preparation, the positioning of the shims (5) on the lower roller (40) is similar to the preparation of the shims (5) of the translator gluing follower device (6). The rounding of the wedge edges (5), their beveling and end tilting is also done in a similar way to the preparation of wedges (5) of the follower gluing apparatus (6).

La différence essentielle entre cet appareil suiveur colleur rotatif (7) et l'appareil suiveur colleur translateur (6) réside dans le mode d'accostage du papier crème (8), le collage de la cale (5), l'estampage du papier crème (8). Ces modes sont décrits ci après.The essential difference between this rotary gluing follower (7) and the translator gluing follower (6) lies in the mode of approach of the cream paper (8), the bonding of the shim (5), the stamping of the paper cream (8). These modes are described below.

La cale (5) est préparée, elle est sous et à distance du papier crème (8) et fait un angle arrière (46) avec ledit papier crème (8).The shim (5) is prepared, it is under and away from the cream paper (8) and at a rear angle (46) with said cream paper (8).

Au moyen du capteur à impulsions (32), d'une électronique adaptée le rouleau inférieur (40) et le rouleau supérieur (41) entraînés par la motorisation transmission (39) adoptent la même vitesse périphérique que la vitesse horizontale du papier crème (8) lors d'un mouvement angulaire égale à l'angle arrière (46), à l'instant précis où la cale (5) et la plaque d'appui compressible (65) se trouvent dans la position représentée sur la figure 4, ordre est donné aux vérins et guides (64) de baisse et monte au rouleau supérieur (41) venant ainsi coller la cale (5) sous le papier crème (8). La cale (5) ainsi fixée à la volée est emportée par le papier crème (8) sans en avoir modifié ou perturbé le mouvement du papier crème (8).By means of the pulse sensor (32), adapted electronics, the lower roller (40) and the upper roller (41) driven by the transmission motor (39) adopt the same peripheral speed as the horizontal speed of the cream paper (8). ) during an angular movement equal to the rear angle (46), at the precise moment when the shim (5) and the compressible support plate (65) are in the position shown in Figure 4, order is given to the cylinders and guides (64) drop and rises to the upper roller (41) thus sticking the shim (5) under the cream paper (8). The wedge (5) thus fixed on the fly is carried by the cream paper (8) without modifying or disturbing the movement of the cream paper (8).

Les deux rouleaux inférieur (40) et supérieur (41) reviennent alors en arrière suivant l'angle (46), un nouveau cycle de préparation, positionnement et collage de cale (5) reprend, une nouvelle cale (5) est collée en respectant un intervalle précis " P " avec la précédente cale (5) et ainsi de suite le cycle se répète.The two lower (40) and upper (41) rollers then return back to the angle (46), a new cycle of preparation, positioning and wedge bonding (5) resumes, a new shim (5) is glued in accordance with a precise interval "P" with the previous wedge (5) and so on the cycle is repeated.

Le calcul de cet intervalle " P " a été expliqué précédemment. C'est un intervalle que les hommes du métier savent très bien calculer et qui est assuré au moyen du capteur à impulsions (69), d'une électronique adaptée et de la motorisation transmission (39).The calculation of this "P" interval has been explained previously. This is an interval that the skilled person can very well calculate and which is provided by means of the pulse sensor (69), a suitable electronics and transmission engine (39).

Au moment du collage l' estampeur (67) et le contre estampeur (68) viennent estamper légèrement le papier crème (8) pour l'obtention d'une surface rugueuse (12) et de deux légères lignes d'encochage (11), nous l'avons déjà évoqué : la surface rugueuse coïncidera avec l'aminci transversal (17) et les lignes d'encochage (11) coïncideront avec la ligne de début d'aminci transversal (17).At the time of gluing, the stamper (67) and the stamper counter (68) lightly etch the cream paper (8) to obtain a rough surface (12) and two light necking lines (11), we have already mentioned it: the rough surface will coincide with the transverse thinning (17) and the notching lines (11) will coincide with the transverse thinning start line (17).

Une variante au dispositif selon l'invention consiste à faciliter le passage des cales (5) et leurs glissements dans la zone entre le mélangeur (1) et le conformateur (13). Il s'agit d'une nappe guide (42) souple, glissante et résistante à l'usure, cette dernière qualité de résistance à l'usure est nécessaire car la nappe guide (42) voit passer le papier crème (8) et toutes les cales (5). Ladite nappe guide (42) de largeur supérieure à la longueur des cales (5) est maintenue par la fixation (47) en amont de la zone mélangeur (1) conformateur (13), la nappe guide (42) est centrée par rapport au défilement du papier crème (8) donc des cales (5), la nappe guide (42) recouvre toutes les zones de frottement et de possible accrochage entre le mélangeur (1) et le début conformateur (13).An alternative to the device according to the invention is to facilitate the passage of shims (5) and their sliding in the area between the mixer (1) and the shaper (13). It is a guide sheet (42) flexible, slippery and resistant to wear, this last quality of wear resistance is necessary because the guide web (42) sees the cream paper (8) and all the wedges (5). Said guide web (42) of width greater than the length of the wedges (5) is held by the fastener (47) upstream of the mixing zone (1) shaper (13), the guide web (42) is centered relative to the scrolling of the cream paper (8) so shims (5), the guide web (42) covers all areas of friction and possible hooking between the mixer (1) and the beginning shaper (13).

Cette nappe guide (42), selon l'invention, recouvre la table (48), les batteurs (18) les points saillants (19), les guides papier crème (8) et protège alors les cales contre tout risque de décrochage intempestif dans cette zone.This guide web (42), according to the invention, covers the table (48), the drummers (18) the salient points (19), the cream paper guides (8) and then protects the wedges against any risk of untimely stall in this zone.

Un dernier dispositif, selon le procédé de l'invention, décolle les cales (5) pour les rejeter dans une poubelle (43). Il s'agit d'une brosse (22) qui tourne en permanence et qui est en biais par rapport à ligne. Cette brosse est actionnée par le vérin (25) qui relève ladite brosse (22) uniquement lors des passages de cales (5). Le vérin (25) est commandé par le détecteur d'empreinte (21) et son électronique associée qui calcule l'instant de montée en fonction de la distance d1 entre le détecteur d'empreinte (21) et la brosse (22) et de la vitesse " V "de la bande composite (45).A last device, according to the method of the invention, takes off the shims (5) to reject them in a bin (43). It is a brush (22) that rotates continuously and is angled relative to the line. This brush is actuated by the jack (25) which raises said brush (22) only during the passage of shims (5). The cylinder (25) is controlled by the cavity sensor (21) and its associated electronics which calculates the rise time as a function of the distance d1 between the cavity sensor (21) and the brush (22) and the speed "V" of the composite strip (45).

La coupe de la cisaille (2) au droit de l'empreinte (20) laissée par la cale (5) est pilotée par le détecteur d'empreinte (21) et une électronique associée qui tiennent compte d'une part de la distances d2 entre le détecteur d'empreinte (21) et la cisaille (2) et d'autre part de la vitesse de défilement " V " de la bande composite (45).The cutting of the shears (2) to the right of the impression (20) left by the shim (5) is controlled by the fingerprint sensor (21) and associated electronics which take into account, on the one hand, the distances d2 between the impression detector (21) and the shear (2) and on the other hand the running speed "V" of the composite strip (45).

Claims (12)

  1. A method for continuous production of plasterboard elements (44) in which two cardboard-type paper sheets (8) and (9) enclose, within shaping means (13), a plaster-based hydraulic binder (10) to create a composite strip (45) which then hardens on two hardening belts (14) and (15) carrying at their edges two tapered strips for producing longitudinal tapered edges (16) thereon, characterised in that it consists in:
    - continuously preparing expandable, flexible, lightweight spacers or packing pieces (5) between 1 and 2 mm thick and 5 to 20 mm wide,
    - cutting said packing pieces (5) to a length equal to a width of the plasterboard being produced less a value comprised between 0 and 10 cm,
    - applying adhesive to an upper face of said packing pieces (5),
    - continuously bonding said packing pieces (5) on-the-fly to the bottom of one of said cardboard-type paper sheets transversely thereto, centered, and perpendicular to a direction of advancement of said paper sheet (8) at accurate regular intervals "p",
    - bonding said packing pieces to said paper sheet (8) in a region ahead of said shaping means (13),
    - allowing said packing pieces (5) to be carried along by said paper sheet (8),
    - adjusting a tension in said paper sheet (8) so as to regulate a width of an imprint (20) created therein to between 10 and 18 cm,
    - leaving said packing pieces (5) fastened to said paper sheet (8) for the time needed to pass through said shaping means (13) and the time needed for the composite strip (45) composed of said paper sheets (8) and (9) and the hydraulic binder (10) to harden,
    - cutting the composite strip (45) with knife means (2) in the middle of the imprints (20) left by said packing pieces (5).
  2. The method according to claim 1, characterised in that said packing pieces (5) are stripped off on-the-fly after said composite strip (45) has hardened in a region extending from an end of a hardening belt (14) and said knife means (2), and preferably in a region (23) located between hardening belts immediately following one hardening belt (14), or in a region located close to and ahead of said knife means (2).
  3. The method according to claim 1 or 2, characterised in that said packing pieces (5) are cut from a roll (26) of flexible strip (27) which is of paper, plastic material, organic material, metal or composite material.
  4. The method according to claim 3, characterised in that a pricked packing piece (57) taken from a roll (26) of flexible strip (27) is pricked over its length along at least one line of pins (58) of variable length (59) allowing control of the overall thickness of a pricked packing piece (57) and consequently of the depth of the transverse tapering (17) being sought, the ends of a pricked packing piece (57) being themselves pricked to a depth different to said height (59) of said pins (58) at a midpoint of said pricked packing piece (57).
  5. The method according to claim 1 or 2, characterised in that said packing piece (5) is reduced to a wire packing piece (52) or a double wire packing piece (55), said wire originating from a roll (26) of flexible wire either of paper, plastic material, synthetic material, organic material, composite material, or metal.
  6. The method according to one of Claims 1-5, characterised in that a surface of said paper sheet (8) on the same side as said packing piece (5) and at both sides of said packing piece and in coincidence with a future transverse tapering (17) created by said packing piece (5) is roughened (12) either by stamping, pricking, knurling, brushing, said surface being additionally pre-marked along two notch lines (11) parallel to said packing piece (5) in a region corresponding to at future beginning of a said transverse taper (17) created by said packing piece (5).
  7. Apparatus for carrying out the method according to any one of claims 1-6, constituted by a plasterboard (44) production line in which two sheets of cardboard-type paper (8) and (9) are unwound and come to enclose a plaster-based hydraulic binder (10) in shaping means (13) to constitute a composite strip (45) which hardens on two hardening belts (14) and (15) fitted with tapered strips for creating horizontal tapers (16), and a guide sheet (42) located between said binder follower device and said shaping means (13) provided to protect said packing pieces (5) against being torn off, and for facilitating the passage and sliding of said packing pieces (5) between said bonder follower device and said shaping means (13), and packing piece (5) removing means located after a hardening belt (14) and ahead of cutting means (2) provided for removing on-the-fly packing pieces (5) bonded to the bottom of said composite strip (45), and cutting means located after a said hardening belt (15) and after said packing piece removing means provided for cutting said composite strip (45) in alignment with each of a number of imprints (20) created by said packing pieces (5), characterized in that it further comprises a bonder follower device located in a region ahead of said shaping means (13), provided for preparing said packing pieces (5) from a roll (26) of flexible strip (27), for coming into contact at high frequency with one of said paper sheets (8), for accurately bonding on-the-fly said packing pieces (5) to the bottom of said paper sheet (8), for roughening and premarking said paper sheet (8) at both sides of a packing piece (5) bonded to the bottom of the one said paper sheet (8),
  8. The apparatus according to claim 7, characterised in that the bonding follower device is a linearly moving bonding follower device (6) constituted by a lower table (29) located underneath one of said paper sheets (8) and another counter-table (36) situated above the said one of said paper sheets (8), said lower table (29) receiving packing pieces (5) originating from a roll (26) of flexible strip (27) and carrying adhesive applied by adhesive-applying means (30) and cut to length by a knife (31) and being provided with a stamper (37) and jacking means and guides (34), said upper counter-table (36) being fitted with a compressible abutment plate (35), a counter-stamper (38) and a pulse sensor (32), the two said tables (29) and (36) being carried by a carriage (70) moved by motor and transmission means (33).
  9. The apparatus according to claim 7, characterised in that said bonding follower device is a rotary bonding follower device (7) constituted by a lower roller (40) located below said one paper sheet (8) and an upper roller (41) located above said one paper sheet (8), said lower roller (40) receiving packing pieces (5) originating from a roll (66) of flexible strip (63) and carrying adhesive applied by adhesive applying means (60) and cut to length by a knife (61) and being equipped at its periphery by a stamper (67), said upper roller (41) located above said one paper sheet (8) in parallel with said first lower roller (40) being equipped at its periphery with a compressible abutment plate (65) and a counter-stamper (68) and being connected to jacking means and guides (64), the two said rollers (40) and (41) being provided with motor and transmission means (39) and with a pulse sensor (69).
  10. The apparatus according to claim 7, characterised in that a guide sheet (42) thereof is constituted by a flexible, slippery and wear-resistant film, secured upstream of said table (48) by fixing means (47), said flexible film, of greater width than a length of said packing pieces (5) simultaneously embracing said table (48), beaters (18), projecting points (19), guides for said one of said paper sheets (8) in the region between a mixer (1) and shaping means (13), said flexible film presenting to said packing pieces (5) within said region a surface that is smooth, slippery and devoid of points where catching or snagging can occur.
  11. The apparatus according to claim 7, characterised in that said means for removing packing pieces (5) consists of jacking means (25) controlled by an imprint detector (21) and associated electronics, said jacking means (25) being connected to a brush (22) itself fitted with a motor, said brush (22) being located below said composite strip (45) and positioned so as to be inclined with respect thereto.
  12. The apparatus according to claim 7, characterised in that said cutting means consist of a shear (2), an imprint detector (21) at a known distance (d2) from said shear (2) and shear stroke calculating means (2).
EP03740583A 2002-04-10 2003-04-09 Method for the production of plaster plates having 4 tapered edges Expired - Lifetime EP1499482B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0204479A FR2838370B1 (en) 2002-04-10 2002-04-10 PROCESS FOR THE MANUFACTURE OF PLASTERBOARDS WITH FOUR THIN EDGES
FR0204479 2002-04-10
PCT/FR2003/001118 WO2003084724A1 (en) 2002-04-10 2003-04-09 Method for the production of plaster plates having 4 tapered edges

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EP1499482A1 EP1499482A1 (en) 2005-01-26
EP1499482B1 true EP1499482B1 (en) 2006-04-26

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EP (1) EP1499482B1 (en)
AT (1) ATE324238T1 (en)
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DE (1) DE60304853T2 (en)
FR (1) FR2838370B1 (en)
PL (1) PL201073B1 (en)
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WO2012155950A1 (en) 2011-05-13 2012-11-22 Knauf Gips Kg Plasterboard production facility and method for producing plasterboard
WO2014090300A1 (en) 2012-12-12 2014-06-19 Knauf Gips Kg Clocked regulation of the amount of plaster paste

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WO2024070013A1 (en) * 2022-09-29 2024-04-04 吉野石膏株式会社 Cutting device, plate-like body production device, gypsum board production device, and gypsum board production method
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012155950A1 (en) 2011-05-13 2012-11-22 Knauf Gips Kg Plasterboard production facility and method for producing plasterboard
WO2014090300A1 (en) 2012-12-12 2014-06-19 Knauf Gips Kg Clocked regulation of the amount of plaster paste
US10022893B2 (en) 2012-12-12 2018-07-17 Knauf Gips Kg Clocked regulation of the amount of plaster paste

Also Published As

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DE60304853D1 (en) 2006-06-01
PL372665A1 (en) 2005-07-25
FR2838370B1 (en) 2004-05-28
US7431783B2 (en) 2008-10-07
PL201073B1 (en) 2009-03-31
ATE324238T1 (en) 2006-05-15
DE60304853T2 (en) 2006-12-07
FR2838370A1 (en) 2003-10-17
AU2003260029A1 (en) 2003-10-20
US20050224154A1 (en) 2005-10-13
EP1499482A1 (en) 2005-01-26
WO2003084724A1 (en) 2003-10-16

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