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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Fibre cement – Cembrit

Alternatively the monolayer first provided in production direction may be the layer with the maximum width, such as the at hatsfhek one monolayer of the second type of monolayers, the second and subsequent layers may gradually have decreasing widths in transversal direction, and each layer may be extended in transversal direction by all previously provided monolayers. With transverse direction is meant the direction perpendicular to the production direction and perpendicular to the plate surface.

Also that that stacks of hatschrk having mutually different widths may be used. Light in weight it is easier to transport and work on site. Typically rectangular parallelepiped-shaped plates are formed.

The hydration process means the material gets progressively stronger, providing concrete like strength but at a much lower weight. We have over 80 years of experience of the use of fibre cement across yatschek varied climates of Europe and beyond. Alternatively the second and subsequent layers may gradually have increasing widths in transversal direction, and each layer may extend in transversal direction beyond all previously provided monolayers.

WO2017001230A2 – Hatschek process – Google Patents

Doping compensation mechanism for producing fiber cement products by wet process. Cement mix and method for producing reinforced building sheets from a cement mix. Also that the order of more wide and less wide monolayers may be varied.

The independent and dependent claims set out particular and preferred features of the invention. Portland cement, limestone, chalk, quick lime, slaked or hydrated lime, ground sand, silica sand flour, quartz flour, amorphous silica, condensed silica fume, microsilica, metalkaolin, wollastonite, mica, perlite, vermiculite, aluminum hydroxide, pigments, anti-foaming agents, flocculants, and other additives.

Process for producing non-combustible gypsum board and non-combustible laminated gypsum board. The fiber cement slurry typically comprises water, process or proces fibers which both may be organic fibers typically cellulose fibers or synthetic proceas polyvynilalcohol, polyacrilonitrile, polypropylene, polyamide, polyester, polycarbonate, etc. It is understood that the sequence of layers with different width may vary according to various patterns. According to some embodiments, the multilayered slab may consist of 2 to 8 monolayers.

Since many imitators also were founded who did not use the Eternit license. The minimum diameter Dmin along the recess is mm. EP EPA1 en The layers are built up to the desired thickness and then removed and if necessary compressed. Process for producing non-combustible gypsum board and non-combustible laminated gypsum board. Thus, appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment, though they could.


The density profiles of the hatcshek, profiled fiber cement plate is shown in figure 8.

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The thicknesses of each of the monolayers may vary from 0. 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.

If you click through, you agree to our use of cookies. A Hatschek process according to any one of the preceding claims, wherein said multilayered slab further 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 the first monolayer.

However the disadvantage is that the density and hence the physical properties of the plate with tapered edges, is different. Cembrit Cemsix Cembrit B5. Preferably the multilayered slab consists of 2, 3, 4, 5, 6, 7 or 8 monolayers, though more monolayers are possible.

The composition of the slurry hatschel is a typical fiber cement slurry comprising water, cement, cellulose fibers, sand and the typical additives.

As such, the monolayer build on this sieve will not build along the covered zones andhence resulting in the fact that a monolayer with smaller width W1 will be formed.

According to some embodiments, the at least one monolayer of a first type of monolayer may have a thickness different from the thickness of the at least one monolayer of a second type of monolayers.

This description is given for the sake of example only, without limiting the scope of the invention. There are manufacturers on every continent testament to the popularity and durability of this amazing material. Talk to Cembrit about what fibre cement can do for your project and join the long line of satisfied users of hatscehk exceptional building material! The sieves are aligned hatscuek to the other in such a way that on the endless beltthe monolayer with the smallest width W1 is encompassed, or in this case covered, by the other monolayers, in this embodiment the other three monolayersandwhich have all a substantially hatschke width W2.

The cross section of this uncured fiber cement plateas shown in figure 5has already a tapered of beveled edges and at both sides and in production direction In a processes according to the invention, at least one of the sieves, e.


The combination of raw material and matrix structure of fibre-cement also provides excellent durability.

WOA2 – Hatschek process – Google Patents

A moveable roll fitting within the recess and contacting it with his circumferential surface can be used as well.

The first was that some manufacturers realized that the curing cycle could be considerably reduced, and cost could be lowered, by autoclaving the products.

Hence, asbestos reinforced fiber cement products are themselves strong, stiff also brittleand could be used in many hostile hatscchek, except highly acidic environments where the cement itself is rapidly attacked hatsfhek.

As shown in figure 6a, a top view of a rotating sieve drum rotating in its slurry containing vat, i. Asbestos, although it is an inorganic fiber, can be”refined”into Asbes, They are stable at high temperatures. A Hatschek process for the production of profiled fiber cement plates is provided. This allowed the replacement of much of the cement with fine ground silica, which reacted at autoclave temperatures with the excess lime in the cement to produce calcium silica hydrates similar to the normal cement matrix.

Fibre cement is not susceptible to mould or rot damage thereby exceeding the longevity of timber, it contains no metals so will not rust and decay like steel and has low thermal conductivity so will not distort in the prescence of heat like PVC. Although the original Hatschek process a modified sieve cylinder paper making machine dominated the bulk of asbestos cement products made, other processes were also used to make specialty products, such as thick sheets say greater than about 10 mm which required about 30 films.

Fibre cement is however porous thereby making it ideal for use in high humidity climates. Fibre-cement is consequently faster to install and less energy intensive in production, saving cost. A1 Designated state s: On this accumulator rollwhich according to the invention has a recess in axial direction along yatschek least part of the circumference as shown in figure 2a plurality of fiber cement multilayered slab layers are accumulated by rotating the accumulator roll along its axisuntil the predefined thickness is obtained.

Each rotating drum rotates around its axis in the vat So in a zone of length L, the diameter of the accumulator roll gradually changes from Dmin to Dmax.