Process Making Fiber Cement old type and improvement. Asbestos fiber cement techhology about years ago, Ludwig Hatschek made the. Equipment Evolution. Hatschek Forming Machine process entire sheet machine output. > Worked on process improvements to provide +/-. 1/8” on all. Hatschek process for the production of fiber cement plates.  NL-A discloses a method and appa- ratus for manufacturing fiber.
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Since many imitators also were founded who did not use the Eternit license. The width of the sieve is the width W2 of the monolayer which will be formed on the sieve surface when the slurry is sucked from the outside of the sieve towards pfocess inner side of the sieve. Efflorescence caused aesthetic degradation of roofing products in particular, and many attempts were made to reduce it. It is understood that, in line with the invention, more or less than four, but at least 2 monolayers can be offered procesx accumulated on the accumulator roll.
The great advantage of this development was that cellulose fibers are hollow hatsvhek soft, and the resultant products could be nailed rather than by fixing through pre-drilled holes. In a processes according to the invention, at least one of the sieves, e. Also that the order of more wide and less wide monolayers may be varied.
He combined, after 7 years of experimenting, cellulose, procss fibres and cement in solution in water. Over the intervening years many of the fibre-cement manufacturers were acquired by the Belgian Eternit Group, now known as Etex.
A Hatschek process according to claim 11, wherein the slurry is removed by spraying water to the slurry to be removed.
Kind code of ref document: A Hatschek process according to any one of the claims 1 to 12, wherein said accumulator roll having a recess in axial direction along its complete circumference, the process further comprising the use of a means to contact the at least one layer of said endless fiber cement multilayered slab to the accumulator roll in the recess at start of accumulation of the at least one layer of said endless fiber cement multilayered hatscek on a profiled accumulator roll.
A Hatschek process according to any one of the claims 1 to 9, wherein each of said monolayers is procese by accumulating fiber cement slurry on a rotating sieve drum and removing said accumulated fiber cement slurry from said rotating sieve drum as a monolayer, the width of said first type of monolayers in transverse direction being provided by removing the part of the accumulated fiber cement slurry from the sieve, which parts extends beyond the width to be provided. With transverse direction is meant the direction perpendicular to the production direction and perpendicular to the plate surface.
It is understood that the sequence of layers with different width may vary according to various patterns. Along a part of the surface of the rotating drum, the surface is provided with perforations, or is provided in a wire net materialforming a sieve. A Hatschek process according to any one of the preceding claims, wherein said multilayered slab hstschek comprises n additional monolayersn being an integer of at least 1, said width of each of said n additional monolayers in transversal direction is more than the first width, and wherein each of said n additional monolayers extending in transverse direction beyond hatsdhek first monolayer.
Process for producing non-combustible gypsum board and non-combustible laminated gypsum board. Harschek minimum diameter Dmin along the recess is mm. The reference figures quoted below refer to the attached hatsche. The density and composition of the slurry used to provide all four monolayers are identical. Filmmaking and assembly method and pressing method of sunflower stalk laminated plate. pdocess
P1 and P5 are at the tapered edges of the uncured, profiled fiber cement plate. For the first rotating drum sieve in production directionat both ends in axial direction, a zone and of the sieve is covered by a water impermeable coating, such as a paint.
Fibre cement – rooted in history
The thicknesses of the monolayers are identical and are 0. Cement mix and method for producing reinforced building sheets from a cement mix. A Hatschek process according to any one of the preceding claims, wherein said recess has a trapezoid shape, the length of the radial projection of each of the legs of said trapezoid shape procwss the axis of said accumulator roll is in the range of 2 to 20 mm.
It is usually but not always covered with thick organic coatings.
WO// A HATSCHEK PROCESS FOR THE PRODUCTION OF FIBER CEMENT PLATES
Position P3 is in the middle of the uncured, profiled fiber cement plate in transversal direction. This allowed the pgocess of much of the cement with fine ground silica, which reacted at autoclave temperatures hatschdk the excess lime in the cement to produce calcium silica hydrates similar to the normal cement matrix. Such references indicate that a particular feature, described haatschek relation to the embodiment is included in at least one embodiment of the present invention.
Immediately after it is formed fibre-cement is still pliable. Throughout this specification, reference to “one embodiment” or “an embodiment” are made. According to a first aspect of the present invention, a Hatschek process for the production of profiled fiber cement plates is provided, the process comprising the steps of. By varying the density of the slurries, one can influence to some extent the thickness of the monolayer when present in the multilayered slab, optionally during accumulation on the accumulator drum.
The combination of raw material yatschek matrix structure of fibre-cement also provides excellent durability. Posted by Frangky Welly W at 6: Providing an endless fiber cement multilayered slab stacking at least one proces of a first type having a first width and at least one monolayer of a second type hatsxhek monolayers having a second width, the at least one monolayer of a second type of monolayers extending in transverse direction beyond the at least one monolayer of a first type of monolayer; Accumulating at least one layer of the endless fiber cement multilayered slab on a profiled accumulator roll having a recess along at least part of its circumference whereby the at least first monolayer is provided within the recess; Removing the accumulated slab from the accumulator roll; and Curing the uncured fiber cement plate.
Doping compensation mechanism for producing fiber cement products by wet proceess. The best combustibility ratings can be achieved with the subtlest of variations to the raw materials. Optionally, at both sides andthe plate can be cut to the required total width as is usually done in Hatschek production, before curing. Asbestos cement was also used in many applications requiring high fire resistance due to the great thermal stability of asbestos.
Fibre cement – a building material with many strenghts Man made PV Jatschek fibres have long since replaced the mineral fibre, and other solids are now added to the slurry to furnish differe nt performance characteristics.
If the density was lowered, the products became more workable for example they could be nailed but the rate of saturation and the total water absorption increased and the freeze thaw performance decreased. Hence, asbestos reinforced fiber cement products are themselves strong, stiff also brittleand could be used in many hostile environments, except highly acidic environments where the cement itself is rapidly attacked chemically. According to some embodiments, the accumulator roll may have a recess in axial direction along its complete circumference, the process further comprising the use of a means to contact the at least one layer of the endless fiber cement multilayered slab to the accumulator roll in the recess at start of accumulation of the at least one layer of the endless fiber cement multilayered slab on a profiled accumulator roll.
However, cellulose reinforced cement products are more susceptible to water induced changes, compared to asbestos cement composite materials. Furthermore, the particular features or characteristics may be combined in any suitable manner in one or more embodiments, as would be apparent to one of ordinary skill in the art. They are stable against alkali attack under autoclave conditions. A Hatschek process according to any one of the preceding claims, wherein the difference between said width W1 of said first type of monolayers in transverse direction and the width W2 of said second type of monolayers is at least 40 mm.
The great disadvantage of these products is a very large increase in material and manufacturing process costs. Cementitious gypsum-containing binders and compositions and materials made therefrom.