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HATSCHEK PROCESS PDF

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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A method and a felt for forming fiber cement articles with base fabric with parallel non- woven md yarns. A typical Hatchek process is shown in Figure 1. Portland cement, limestone, chalk, quick lime, slaked or hydrated lime, ground sand, silica sand flour, quartz flour, amorphous silica, condensed silica fume, hatsche, metalkaolin, wollastonite, mica, perlite, vermiculite, aluminum hydroxide, pigments, anti-foaming agents, flocculants, and other additives.

The layers are built up to the desired thickness and then removed and if necessary compressed. With such strengths you would think fibre cement should be used everywhere, and you would be right. Asbestos, although it is an inorganic fiber, can be”refined”into Asbes, They are stable at high temperatures.

However, cellulose reinforced cement products are more susceptible to water induced changes, compared to asbestos cement composite materials. A method and a felt for forming fiber cement articles with base fabric with parallel non- woven md yarns. This slabwhich is transported in production directionis contacted by the rotating accumulator roll According to some embodiments, each of the monolayers may be provided by accumulating fiber cement slurry on a rotating sieve drum and removing the accumulated fiber cement slurry from the rotating sieve drum as a monolayer, the width of the 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.

Curing the uncured fiber cement plate to provide a profiled fiber cement plate with tapered of beveled edges may be done by e. A Hatschek process according to claim 1, wherein the recess has a depth of between 0. The Hatschek process according to claim 1, wherein said recess has a depth of between 0. US USB2 en The same reference signs refer to the same, similar or analogous elements in the different figures. 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.

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It is to be noticed that the term “comprising”, used in the claims, should not be interpreted as being restricted to the means listed thereafter; it does not exclude other elements or steps. Attempts to overcome this extra process step of material removal, which is relatively expensive, by accumulating uncured fiber cement slab as multilayered slab form the Hatschek machinery on a profiled accumulator roll.

A Hatschek process for the production of profiled fiber cement plates is provided. Preferably the difference between the width W1 of the first type of monolayers in transverse direction and the width W2 of the second type of monolayers is at least 50 mm, e.

A process for producing shaped fiber cement board Hatschek hahschek, said process comprising the steps: This means it can be moulded into 3 dimensional shapes, can be embossed and because the fibre matrix pgocess the cement and other solids, can be far thinner than concrete.

By the time the license expired in the industry was established.

WOA2 – Hatschek process – Google Patents

This absence ensured the fresh slab to be picked up by the accumulator roll immediately after removal of the previous accumulated slab. Kind code of ref document: Method for producing mosaic panels for facings and pavements, plant for carrying out this method and panel obtained thereby. As the system may continue to rotate, this is de facto an endless fiber cement multilayered slab. Thus, the scope of the expression “a device comprising means A and B” hatsche not be limited to devices consisting only of components A and B.

Process for producing non-combustible gypsum board and non-combustible laminated gypsum board.

A moveable roll fitting within the recess and contacting it with his circumferential surface can be used as well. This website uses cookies to measure traffic and for optimization of content.

Fibre cement – rooted in history

For each slab, the monolayer with reduced width, and is provided within the recessthereby providing an accumulated slab Once the accumulated slab has reached its desired thickness, the slab is taken from the accumulator roll and laid down on a transport device as shown in figure 1thereby providing an uncured, profiled fiber cement plate Reinforced cement sheet product containing no asbestos for fabricating on Hatschek machine. The density profiles of the uncured, profiled fiber cement plate is shown in figure 8.

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According to some embodiments, each of the monolayers may be provided by accumulating fiber cement slurry on a rotating sieve drum and removing the accumulated fiber cement slurry from the rotating sieve drum as a monolayer, the width of the first type of monolayer in transverse direction being provided by obstructing at least part of the sieve at the outer ends in axial direction of the rotating sieve drum.

Thereafter the second and further layers in production direction sequence may all be of the second type of monolayers with a width W2 and extending in transversal direction beyond the first layer.

A Hatschek process according to any one of the preceding claims, wherein each of said monolayers is provided 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 monolayer in transverse direction being provided by obstructing at least part of the sieve at the outer ends in axial direction of the rotating sieve drum.

They are picked up and stacked on an endless transport beltbeing a water permeable felt or fleece. According to some embodiments, the recess may have a trapezoid shape, the length of the radial projection of each of the legs of the trapezoid shape on the axis of the accumulator roll is in the range of 2 to 20 mm. At that moment, the accumulated slab is cut and taken from the rolland laid down on a transport device Preferably the multilayered slab consists of 2, 3, 4, 5, 6, 7 or 8 monolayers, though more monolayers are possible.

Alternatively rotating sieve drums with different the axial length of the rotating sieves may vary to provide the different monolayer widths. A Hatschek process according to any one of the preceding claims, wherein said multilayered slab further comprises m additional monolayerssaid m monolayers being monolayers of said first type of monolayers.