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
• • 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
  • B28B11/14—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting

Definitions

• the present invention relates to a method of manufacturing plates based on hydraulic binder such as plaster, these plates having thinned edges.
• the invention also relates to a production line for such plates and to a device which can be used for manufacturing these plates.
• the assembly thus produced of several plates constitutes a continuous surface having good flatness.
• the solution proposed by the first of these patents consists in making a transverse groove in the lower sheet of paper by folding the latter before pouring the plaster composition and arriving on the conveyor belt.
• the transverse groove protruding from the bottom sheet of paper creates, after the sheet of paper on the conveyor belt, a hollow whose walls are at an angle. Then cutting the plate at the end of 19946PC
• the invention therefore aims to provide a method for the manufacture of plasterboard having thinned transverse edges. This process manages to remedy the drawbacks of the techniques proposed in the prior art.
• the invention relates to a method for manufacturing a plate based on hydraulic binder, with thinned edges, in which: 19946PC
• step 2) the coated material obtained is passed through a die (4) so as to obtain a preform, 3) the hydraulic setting of the hydraulic binder composition is allowed to take place, and 4) the preform is cut, this process characterized in that a) it further comprises the following steps: - before step 2), a slat whose length is approximately at least equal to the width of the facing material is extracted from a slat store and introduces this slat under said facing material;
• step 3 said slat is removed; and in that b) the cutting of step 4) is carried out at the level of the thinning created by the slat.
• the invention also relates to a production line for plates based on hydraulic binder having thinned edges from a preform comprising at least one facing material covered with a composition of hydraulic binder, this production line comprising a die, as well as, upstream of this die, means for introducing, under the facing material, a slat whose length is approximately at least equal to the width of the facing material.
• the invention also provides a device for the introduction of slats under a facing material, with a view, in particular, to manufacturing plates based on hydraulic binder having thinned edges, this device comprising:
• Means for moving the slat moved in a direction parallel to its width and characterized in that it further comprises means for coating with glue at least a part of the upper face of the slat.
• FIG. 2 schematically shows the scrolling of the preform accompanied by a slat
• FIG. 3 shows schematically step b) of the method according to one invention
• - Figure 4 shows a plate as obtained by the method according to one invention
• - Figure 5 shows a plate obtained by the method according to a preferred embodiment of the invention
• FIG. 6 shows schematically and in perspective, part of the production line according to one invention
• FIG. 7 shows schematically and in top view, the device according to the invention.
• FIG. 8 shows schematically and in side view, the device 1 according to the invention
• FIG. 9 shows schematically and in side view a variant of the device according to the invention.
• - Figure 10 shows schematically and in section, a detail of the device of Figure 6, illustrating the introduction of a slat under the facing material;
• FIG. 11 shows schematically and in section, a variant of the device according to the invention.
• transverse edges is meant in the present description the edges perpendicular to the direction of movement of the conveyor belt in a production line for plates based on hydraulic binder.
• FIG. 1 there is seen a production line for plates produced by casting on a facing material 1 of a hydraulic binder composition 2 and, generally, covering with a second facing material 3.
• the hydraulic binder composition preferably includes plaster.
• the facing materials 1 and 3 may consist of sheets of paper or cardboard, glass mats or any material known to those skilled in the art as being able to serve as facing material.
• a slat 6 is introduced between the facing material 1 and the plate 403.
• This plate 403 may have been obtained by cutting a piece of a plate 404 so as to create the plate 403 and between the latter and the rest of the plate 404, a space for the introduction of the batten 6.
• the introduction of the batten can be carried out upstream, in or downstream of the casting area.
• upstream and downstream refer to the direction of travel of the preform 5.
• the slat 6 is then entrained by the facing material 1 and the conveyor belt 7.
• the hydraulic setting and hardening of the plaster composition 2 is then carried out throughout the movement of the preform 5, designated by the arrows A.
• the upper face 401 of the slat 6, that is to say that intended to come into contact with the facing material 1 (see FIG. 1), can be at least partially coated with an adhesive allowing it to adhere to the facing material 1, in particular when the introduction of the slat is carried out upstream of the casting area.
• the withdrawal of the slat 6 takes place before the preform 5 is cut.
• the removal of the slat 6 can be carried out in any suitable manner. It can be done, quite simply, by the fall of the batten
• the slat 6 can also be removed using a blade or a brush (not shown) scraping the underside of the facing material 1 to which the slat 6 adheres at a suitable place, for example in the space between two rollers mentioned in the previous paragraph. 19946PC
• the cutting device is adjusted so that the knives 9 and 9bis cut the preform 5 approximately in the middle of the thinning 8.
• each thinning 8 depends on the dimensions of the slat 6.
• the latter is generally a parallelepiped whose thickness is generally between 0.5 and 4 mm, preferably between 1.5 and 4 mm. Its width is generally between 5 and 20 cm and its length is approximately equal to the width of the facing material 1.
• the material of the slats 6 does not matter, as long as it allows these slats to resist the weight of the thickness of preform 5 which is located above each slat 6. It can therefore be a plastic material, wood , metal, cardboard, etc. with good wear resistance and stability over time.
• the method which has just been described complements a known method for manufacturing plasterboards having two thinned longitudinal edges.
• the latter generally provides for the installation of a strip, generally in terms of 19946PC
• the length of the plasterboard produced depends, of course, on the speed of movement of the conveyor belt and the frequency of the cutting operations.
• the frequency of the cutting operations is generally directly related to the frequency of insertion of the slats, since it is generally sought to obtain plates having two thinned transverse edges.
• the method according to the invention is very flexible, because to change the length of the plates produced, it is sufficient to modify the frequency of introduction of the slats.
• FIG. 6 shows a part of a production line for plates based on hydraulic binder implementing the method according to the invention.
• a slatted magazine 20 formed of a horizontal rectangular surface 21 from the corners of which rise vertically and parallel, four angular pieces 22, in the form of an angle iron and turned towards each other, so as to frame a stack of slats 23. 19946PC
• this slat magazine 20 are such that it can store a large number of slats 23 (see also Figures 7 and 8).
• the horizontal surface 21 of the slat magazine 20 is supported by feet 24.
• two cylinders 26 are arranged in parallel, which are oriented so as to extract the first batten 23 from the stack by pushing and sliding it towards an inclined plane 27 consisting of a downwardly inclined surface 28 and a flange 29 at its lower part to retain the slat which has just been extracted and guide it later.
• a jack 31 is arranged parallel to the longitudinal axis of the inclined plane 27, so that the actuation of this jack 31 can give an impulse to the slat which has just been extracted from the slat magazine 20.
• the slat thus propelled can then move by sliding parallel to the longitudinal axis of the inclined plane 27, the flange 29 of which guides it , towards a second inclined plane 32 which extends the first inclined plane 27, on the transverse side opposite to the side 30.
• means 402 are provided, for example between the first inclined plane 27 and the second inclined plane 32, to coat at least partially with glue the upper face 401 of the slats 23.
• These means 402 can be constituted, by example, by a brush 402 situated above a slat 23, when this slat is on the first inclined plane 27.
• the displacement of the slat 23 from the first inclined plane 27 towards the second inclined plane 32 allows the brush 402 at least partially coat the upper face 401 of the slat 23 with an adhesive which then allows it to adhere to the facing material.
• the second inclined plane 32 also consists of an inclined surface 33 provided with a flange 34 at its lower part. It further comprises a stop 35 at its end 19946PC
• this stop generally consisting of a pneumatic damper and being intended to put an end to the movement of the slat propelled by the jack 31.
• the rim 34 is provided with openings 36 in front of which are arranged two jacks 37 oriented so as to propel the batten positioned on the second inclined plane 32 upwards of the inclined surface 33.
• the first inclined plane 27 and the second inclined plane 32 are supported by feet, respectively, 38 and 39.
• a planar surface 40 is provided parallel to the surface 23, between the latter and the first inclined plane 27 for horizontally supporting a slat extracted from the slat magazine 20 before it descends on the inclined surface 28 of the first inclined plane 27.
• the height of the feet 24, 38 and 39 is chosen so that a slat positioned on the second inclined plane 32 is situated at a height less than that of the preform 5.
• the longitudinal axis of the rim 34 of the second inclined plane 32 is perpendicular to the longitudinal axis of the plate 403 (or conveyor belt 7);
• the means 32, 33, 34, 35 for supporting the displaced batten are located opposite the start of the plate 403;
• the inclined surface 33 of the second inclined plane 32 is adjacent to the plate 403.
• the length of the second inclined plane 32 is at least equal to that of the slat 23, that is to say at least equal to, and preferably greater than, the width of the preform 5.
• the slats can be arranged other than by stacking in the slat magazine. They can for example be placed side by side or according to any suitable arrangement allowing them to be extracted individually from the slat store.
• the production line according to the invention generally comprises electronic means which control its operation and make it possible, if necessary, to control between them the implementations of different operations.
• These electronic means provide that after the introduction of a batten under the preform by actuation of the jacks 27, the jack 31 is actuated to introduce a new batten on the second inclined plane 32, then the jacks 26 are actuated to introduce another slat on the first inclined plane 27, and so on.
• the electronic means can vary the frequency of these operations to reduce or increase the length of the plasterboard with thinned edges produced.
• the production line comprises means for accelerating the slat and / or means for accompanying the slat during that she is in the industry.
• These means are represented in FIG. 11 by fingers (405a, 405b), which are placed on a motorized belt 406, the speed of which is substantially equal to that of the facing material.
• fingers (405a, 405b) are placed on a motorized belt 406, the speed of which is substantially equal to that of the facing material.
• the means (32,33,34,35) initially inclined are raised, for example using jacks, in a substantially horizontal position.
• a first finger (405a) then comes to bear on the batten, at its ends.
• the slat is then driven towards the die, by an acceleration zone for example of a few cm or more, so that, when in contact with the facing material, the relative speed of the slat with respect to the facing material either very weak or even zero.
• This moment of contact is represented by dotted lines on the 19946PC
• FIG. 11 also represents an intermediate state. In this state, the slat 23 is in contact with the facing material, is slid over the lower part of the die. The batten is driven by the finger (405b) at a speed which is that of the facing material. The frictional forces between the slat and the lower part of the die are therefore entirely compensated by the action of the finger.
• the means 20 to 22, 24 to 39 and 402 or 405 and 406 which have just been described can be combined into a device according to the invention.
• the slat can be of substantially equal length (up to

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Ceramic Engineering (AREA)
• Mechanical Engineering (AREA)
• Structural Engineering (AREA)
• Dry Formation Of Fiberboard And The Like (AREA)
• Press-Shaping Or Shaping Using Conveyers (AREA)
• Panels For Use In Building Construction (AREA)

Priority Applications (1)

Applications Claiming Priority (4)

Publications (1)

Family

ID=29762730

Family Applications (2)

Family Applications Before (1)

Country Status (6)

Families Citing this family (7)

Family Cites Families (28)

• 2002
  • 2002-07-19 EP EP02291838A patent/EP1382424A1/de not_active Withdrawn
• 2003
  • 2003-07-17 AR AR20030102580A patent/AR040494A1/es unknown
  • 2003-07-18 AU AU2003271818A patent/AU2003271818A1/en not_active Abandoned
  • 2003-07-18 EP EP03753655A patent/EP1525076A2/de not_active Withdrawn
  • 2003-07-18 WO PCT/FR2003/002281 patent/WO2004009309A2/fr not_active Ceased
  • 2003-07-18 US US10/521,756 patent/US20050257873A1/en not_active Abandoned
  • 2003-07-18 PL PL03373050A patent/PL373050A1/xx unknown

Non-Patent Citations (1)

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