EA023362B1 - Coating manufacture method - Google Patents

Abstract

The invention relates to methods for manufacture of a coating, in particular, two-layer coating from rubber crumb that can be used for construction of sidewalks, children's playgrounds, sports grounds, etc., and as a cladding material. The coating manufacture method comprises preparation of a mixture for the lower layer of the coating by mixing a rubber crumb filler and a binder. The novel feature is that the prepared mixture is loaded into a silo mounted above a rotatable table. The table carries adjustable moulds provided with heating devices. After heating of the moulds, a pre-fabricated sheet material used as the upper layer of the coating is placed on the bottom part of the lower mould section situated in front of the silo. Further, the lower section of the mould with the sheet material is moved to a position under the silo where the mixture for the lower layer of the coating is loaded. After that, the loaded lower section of the mould leaves its position under the silo, is closed by the upper section and moved to the press. After pressing, the heated mould with compacted mixtures is moved by the rotating table to the named silo in front of which the finished coating is discharged. The technical result provided by implementation of the method according to the invention consists in provision of a continuous coating manufacture process using adjustable moulds.

Description

(57) The invention relates to methods for manufacturing a coating, in particular a two-layer, of crumb rubber, which can be used for the construction of sidewalks, children's, sports and other playgrounds, as well as in the form of facing material. A method of manufacturing a coating, comprising preparing a mixture for the lower coating layer by mixing a filler of rubber crumb and a binder. What is new is that the prepared mixture is discharged into a hopper mounted above a rotary table. Adjustable molds equipped with heating devices are installed on the table. After heating the molds, a prefabricated sheet material is laid on the bottom of the lower portion of the mold located in front of the hopper, which is used as the top coating layer. Next, the lower section of the mold with sheet material moves under the hopper, where the mixture is unloaded for the lower coating layer. After that, the loaded lower section of the mold comes out from under the hopper, closes with the upper section and moves under the press. After pressing, the heated mold with compacted mixtures during the rotation of the table moves to the said bunker, in front of which the fabricated coating is removed. The technical result obtained by the implementation of the developed method is to provide a continuous process for the manufacture of coatings on adjustable molds.

023362 B1

Technical field

The invention relates to methods for manufacturing a coating, in particular a two-layer, of crumb rubber, which can be used for the construction of sidewalks, children's, sports and other playgrounds, as well as in the form of facing material.

State of the art

The prior art method of manufacturing a porous rubber coating (see the closest analogue KI 2250915, class C09B 117/00, C09B 175/00, C08B 11/04, publ. 10.12.2004), which consists in preparing the filler in the form crumb rubber and a binder, mix these components in a mixer and unload the resulting mixture. In this case, a porous coating is made in such a way that a filler with a fraction of up to 10 mm is taken in an amount of from 1 to 6 parts by weight, a binder based on polyurethane in an amount of from 0.8 to 1.2 parts by weight, dye is added in an amount from 0.03 to 0.1 parts by weight, the mixing process is carried out at a temperature exceeding 2 ° C in a screw mixer with a reverse drive until a homogeneous mass is obtained, the binder being introduced after the filler and dye during mixing, and the discharge obtained the masses are produced with a screw mixer in prepared bone with subsequent packing in pre-prepared surface evenly, align the coating obtained, and compacted manually maintained until complete solidification.

The disadvantage of the above method is the low productivity of the manufacture of the coating; the possibility of lumps in the mixture being produced, which can lead to latent defects in the coating; lack of color combination; insufficient strength of the manufactured coating.

The prior art method for the manufacture of coatings (see the closest analogue KI 2465294, IPC S09I 175, E01C 13/06, E01C 13/10, E01C 15/00, 10.27.2012), including the simultaneous preparation of mixtures for the upper and lower layers of the coating by mixing the filler of rubber crumb and a binder based on polyurethane, while a pigment dye is added to the mixture for the upper coating layer. In the process of manufacturing mixtures, they are compacted, after which the mixture for the upper layer is sequentially unloaded into the mold, then the mixture for the lower layer is pressed using a press, then it is allowed to cure completely and the resulting coating is unloaded from the mold. The above method allows to produce a reliable two-layer coating with damping properties.

The disadvantages of this method include the lack of readjustment of equipment, in particular molds, for the manufacture of coatings of different thicknesses and / or densities, which reduces the productivity of the coating and leads to its cost increase.

Disclosure of invention

The objective of the invention is directed to the development of a method that provides an effective and continuous process for the manufacture of coatings of rubber crumb with a minimum number of staff.

The technical result obtained by implementing the developed method is: to ensure a continuous process for the manufacture of coatings; to reduce the complexity and increase the productivity of the manufacture of the coating with a minimum number of staff; the ability to adjust equipment, including molds, for the manufacture of coatings of different thickness and / or density; the possibility of making the coating in one revolution of the table on which the molds are installed; in the possibility of manufacturing a coating with a denser upper layer relative to the lower coating layer.

The specified technical result is achieved by the fact that in the method of manufacturing the coating, which consists in preparing the mixture for the lower coating layer by mixing the filler from rubber crumb and a binder, according to the invention, the prepared mixture is unloaded into a hopper mounted above a table, made with rotation and equipped with installed around the circumference molds, each of which is equipped with a bottom part, adjustable in height relative to the lower portion of the mold, and heating devices, When pre-heated in the upper and lower sections of the mold to heat them up to the temperature set by the operator, after heating the molds on the bottom of the lower section located in front of the hopper, pre-fabricated sheet material is used, which is used as the upper coating layer, and during rotation the table mentioned lower section with sheet material is moved under the hopper, where the mixture is unloaded for the lower coating layer, then the loaded lower section comes out from under the hopper, closes the upper part of the mold and moves under the press, after pressing, the position of the upper part of the mold is fixed with clamps and the filled mold heated by heating devices moves during rotation of the table to the said bunker, in front of which the upper part is released from the clamps and rises up, then the bottom part of the lower section rises up and pushes the fabricated coating out of the lower mold section, after removing the fabricated coating into the freed Nij portion stacked sheet material, and coating the entire manufacturing cycle is repeated for each newly installed on a table of the mold.

- 1 023362

The manufacture of the coating is carried out with constant heating of the molds by heating devices.

Molds can be heated to a temperature of 100-160 ° C.

The bottom of each mold can be equipped with a rod with a limiter for its vertical movement.

Each mold is equipped with downward movement stops.

Each mold is equipped with a heating device located around the perimeter of the side walls of the lower section.

The coating can be made in one revolution of the table.

In the manufacture of the mixture for the lower layer, a filler of rubber crumb of a fraction of 2-12 mm and a binder based on polyurethane are used.

The sheet material can be made of filler in the form of crumb rubber fractions 1-3 mm and a binder based on polyurethane with the addition of pigment dye.

Brief Description of the Figures

FIG. 1 - schematically shows the proposed equipment for the production of coatings; FIG. 2 is a view A in FIG. one;

FIG. 3 is a schematic top view of the open lower portion of the mold;

FIG. 4 - schematically shows the process of filling the lower portion of the mold;

FIG. 5 is a schematic top view of a mold with a fixed upper portion;

FIG. 6 is a view C in FIG. 5 with a local section;

FIG. 7 - schematically depicts the latch.

The figures depict

- table;

- base;

- Press form;

- press;

- hopper;

- elements;

- lower section of the mold;

7a - the lower part;

7b - bottom part;

7c - side walls;

- the upper section of the mold;

8a - the lower part of the upper section;

8b - sidewalls of the upper section;

- casing;

- heating device;

- limiters;

- chain transmission;

-stock;

- movie;

- rail;

- limiters;

-spring;

- mechanism;

18a - rotary lever;

- longitudinal elements;

- grip handle;

- limiters;

- chain transmission;

- protrusions;

- top end;

- supports;

- rollers of supports;

- clamps;

27a - the upper portion of the latch;

- vibrator;

- thermal insulation material;

Υ - sheet material,

B is the axis of the bearing.

It should be understood that specialists in the art will be able to offer other embodiments of the invention and that some of its details can be changed in various other aspects,

- 2 023362 without going beyond the essence and scope of the present invention. Accordingly, the explanatory figures and a detailed description of the method of manufacturing the coating are illustrative, but not restrictive.

The best embodiment of the invention

The proposed method for the manufacture of coatings is relatively simple and technologically advanced; it allows the previously utilized rubber products, for example, automobile tires, to continuously produce a safety coating of increased strength with damping properties.

The top layer of the coating is a decorative layer, which can have a different color scheme. The top layer is usually made of filler in the form of crumb rubber fractions, mainly from 1 to 3 mm, with the addition of a binder based on polyurethane and pigment dye. The top coating layer can be made of previously made thin seamless sheet material Υ. For ease of use, the manufactured sheet material Υ is usually rolled up and called a roll coating. Mentioned sheet material Υ is made more dense with respect to the lower coating layer, which increases the wear resistance and reliability of the manufactured coating.

The lower coating layer is the base layer and is made primarily of black rubber crumb. The lower coating layer is a hardened mixture of a binder based on polyurethane with a filler in the form of crumb rubber fractions mainly from 2 to 12 mm

The coating can be made on equipment, a detailed description of which is given below.

Equipment (see Fig. 1, 2) contains a table 1 made with the possibility of rotation and revolution about the axis b; base 2; molds 3 for the manufacture of coatings; press 4 for compaction of the mixture; hopper 5 for loading the mixture.

Turning the table 1 means turning it through an angle of 360 °.

Table 1 is connected to the base 2 by means of radially arranged elements 6, which are beams. Elements 6 can be made in the cross section of a rectangular or I-shaped, or U-shaped, or other shape, while they must be strong and reliable. In a specific example of execution, each of the elements 6 is made in a cross section of an I-shaped form, and table 1 is made in plan in the form of a circle.

The base 2 contains a cylindrical section, inside which a bearing is mounted, with which the elements 6 and, accordingly, the table 1 are rotated relative to the axis b of the bearing in one direction, in particular in the direction B (see Fig. 2).

Due to the fact that all molds 3 have the same design, the construction of one of the molds 3 in which the coating is made will be described below.

The mold 3 contains the lower 7 and upper 8 sections, while the upper section 8 is configured to lift (tilt) up above said lower section 7.

The hopper 5 for the mixture is installed above the table 1 and above the lower portion 7 of the mold 3. Moreover, the hopper 5 is connected to a vibrator 28, which allows efficiently unloading the mixture from the hopper 5 directly into the lower portion 7 of the mold 3. In a specific embodiment, the vibrator 28 mounted on hopper 5.

The lower section 7 (see Fig. 3, 4) is box-shaped and is formed by the lower part 7a; the bottom part 7b, adjustable in height of the lower portion 7 of the mold 3; side walls 7c located around the perimeter of said bottom portion 7b. Moreover, the said bottom part 7b is located between the side walls 7c with the possibility of vertical movement (in the direction 8), and the lower part 7a is made stationary and extends beyond the side walls 7c. The aforementioned bottom portion 7b defines from below the loading zone Ό of the lower portion 7 of the mold 3.

The lower section 7 of the mold 3 is installed in a metal casing 9, covering the side walls 7c with a gap Ζ. Said casing 9 is fixedly connected to the lower part 7a, wherein said connection can be made one-piece, for example, by means of a welding connection or detachable, for example, by means of fasteners, in particular bolts or screws.

The lower section 7 of the mold 3 is equipped with heating devices 10, one of which is located in the gap Ζ between the casing 9 and the side walls 7c, and the second is installed in the bottom 7b. In the aforementioned gap Ζ, an insulating material 29, for example mineral wool, can be installed to reduce the heat loss of the mold 3. In a specific embodiment, each heating device 10 is a heating element.

To regulate the volume of the loading zone Ό of the lower section 7, in the fixed lower part 7a, stoppers 11 for moving down the bottom part 7b are installed. The volume of filling of the Ό loading zone of the lower section 7 can affect the thickness of the produced coating, namely, the more the mixture is loaded, the thicker the manufactured coating, and vice versa.

The stops 11 are connected to each other by a chain gear 12 located on the outside of the lower section 7, which allows you to simultaneously adjust the position of all four stops 11 when at least one of them rotates. The stops 11 can be made in the form of bolts

- 3 023362 or screws or other devices. In a specific embodiment, screws are used as limiters 11. This design provides simultaneous and uniform movement up or down of all the stops 11 limiting the downward movement of the bottom part 7b with the laid sheet material Υ and the mixture for the lower coating layer.

For the convenience of laying sheet material Υ on the bottom part 7b of the lower section 7 and pushing the manufactured coating out of the lower section 7 of the mold 3, said bottom part 7b is connected to the rod 13, which is connected to the bottom part 7b by one end section and the opposite (free) the end section is connected to the roller 14, designed to move along the rail 15. The aforementioned rod 13 is installed in the hole of the lower part 7a and is equipped with a limiter 16 to move, intended to abut the outer surface of the lower part 7a, thereby m limiting the movement of said plunger 13 and the bottom portion 7b upwards (direction 8).

The rail 15 is mounted on the springs 17 under the table 1 and, accordingly, under the mold 3, designed to fill the mixture. The mentioned rail 15 is installed at an angle to the plane XX of the location of the base 2 of table 1, while the height of the th rise of the rail 15 is increased in the direction of the hopper 5, and the section of the rail 15, as close as possible to the hopper 5, is horizontal. In front of the hopper 5, the rail 15 is interrupted, and during the rotation of the table 1 in the direction B and movement of the mold 3, the rod 13 with the bottom part 7b and the laid sheet material Υ are lowered and abuts against the stops 11 (see Fig. 4, position II) .

The lower sections 7 of the mold 3 together with the casings 9 are placed in the table 1 at a distance from each other between the adjacent installed elements 6. Moreover, each of the mentioned lower sections 7 is fixedly connected to the elements 6, between which it is located.

The upper section 8 is connected to the lower section 7 by means of a mechanism 18 provided with a spring-loaded pivoting lever 18a for opening the mold 3, namely, the raising (folding) of the upper section 8 (see Fig. 5).

The upper section 8 of the mold 3 is box-shaped and provided with longitudinal elements 19 located above and outside, connected to each other by a gripping handle 20 for lifting (folding) the upper section 8. The longitudinal elements 19 are sections that absorb the load of the press 4, which is distributed over the entire area of the upper section 8 to seal the loaded mixture.

Inside the upper portion 8, a heating device 10 is installed (see FIG. 6) and a heat-insulating material can be placed to reduce heat loss. The heating device 10 heats the lower portion 8a of the upper portion 8 and, accordingly, the mixture in the mold 3, which speeds up the coating process.

To control the density and / or thickness of the produced coating, said upper portion 8 is provided with limiters 21 for its movement. The said stops 21 are made with the possibility of height adjustment relative to the plane of the lower part 8a of the upper section 8 and with the possibility of abutment against the upper end 24 of the side walls 7c of the lower section 7 of the mold 3, which restricts the entry of the upper section 8 into the loading zone Ό of the lower section 7 and, accordingly, limits the pressure of the press 4 on the mixture during the pressing process.

The stops 21 are mounted on the outer side of the upper section 8 and are interconnected by a chain gear 22. This design provides simultaneous and uniform movement up or down of all the stops 21 when adjusting at least one of them. The stops 21 can be made in the form of bolts or screws or other devices. In a specific example of execution, screws used in the holes of the local protrusions 23 formed on the sides 8b of the upper section 8 and as close as possible to its corners are used as stops 21. And as the protrusions 23, nuts are used, connected by welding to the sidewalls 8b of the upper section 8.

Under the table 1, supports 25 are installed with rollers 26, contributing to the rotation of the table 1. Mentioned supports 25 also prevent local distortions of the table 1, which can be caused by the relatively large size of the table 1 and the loads that are transferred to the table 1 during the compression of the mixture in the mold 3.

On the table 2, at least two latches 27 are installed next to each lower section 7, preventing the spontaneous opening of the mold 3, i.e. lifting up (folding), the upper section 8 in the manufacturing process of the coating. Each of the latches 27 is made in the form of a G-shaped element with a rotatable upper section 27a (see Fig. 7). An advantageous option is the presence of two opposite pairs of latches 27 located on opposite sides of the lower section 7 of the mold 3. This design allows you to reliably fix at four points the horizontal position of the upper section 8 of the mold 3 during the manufacture of the coating, which improves the quality of the latter.

A method of manufacturing a two-layer coating is implemented as follows.

For the manufacture of the coating, a pre-selection is made of a colored sheet material Υ with a thickness of 2 to 8 mm, as well as a binder based on polyurethane. As a binder may be

- 4 023362 used adhesive brand NEOMER-MS or other brands that have the same properties and characteristics as the above adhesive. The binder must have a liquid and viscous consistency, and in color it can be transparent or opaque, for example, milky or yellowish or another color.

As a filler, rubber crumb of a fraction of 2-12 mm is selected. To prepare the filler, a vibrating screen can be used, by means of which rubber crumb is sieved, because it is important that the filler is free from foreign matter, such as, for example, textile and / or metal cord.

Billets are cut out of the sheet material Υ, the shape and dimensions of which practically repeat the shape and dimensions of the bottom part 7b of the lower section 7 of the mold 3.

Preparation of the mixture for the lower coating layer is carried out by mixing in the mixer the filler from the crumb rubber fraction 2-12 mm and a binder based on polyurethane. The process of mixing the mixture can be accompanied by its compaction by introducing into the mixer a piston that moves smoothly under pressure in the range from 5 to 100 bar. This allows you to get a homogeneous mass, to avoid the formation of lumps in the mixture and thereby improve its quality and, accordingly, the reliability of the coating during its operation.

Simultaneously with the process of preparing the mixture, the equipment is prepared as follows. Molds 3, namely the inner surface of the lower 7 and the lower part 8a of the upper 8 sections, are lubricated with a non-stick composition, in particular polymethylsalaxane grease, preferably with a viscosity of 200 (PMS-200), which avoids the adhesion of the mixture to the mold 3 and facilitates removing the manufactured coating from the lower portion 7 of the mold 3. Also, the upper 8 and lower 7 sections of the molds 3 are heated by heating devices 10 to a temperature set by the operator, in the range from 100 to 160 ° C. It should be noted that the heating process of the molds 3 is carried out continuously throughout the entire process of manufacturing the coating, which allows you to make the coating in one revolution of the table 1.

Throughout the manufacture of the coating, the heating temperature of the molds 3 and the rotation speed of the table 1 can be adjusted by the operator. For example, the heating temperature of the molds 3 does not change over the entire period of time the coating is made: in this case, if it is necessary to produce a relatively thick coating in one revolution of table 1, the rotation speed of table 1 is reduced, thus, the heating time of the mixture increases; if you want to make a relatively thin coating in one revolution of the table 1, then the speed of rotation of the table 1 increases, thus, the heating time of the mixture is reduced.

The situation of manufacturing coatings of different thicknesses and / or densities on different molds 3 for one revolution of table 1 is not ruled out. In this case, the operator controls the heating temperature and the parameters of each mold 3. Namely, the position of the limiters 11 for moving down the said bottom part is regulated 7b by rotating one of them; in the upper section 8, the position of the limiters 21 is adjusted by rotating one of them, while the set distance N between the extreme lower point О of the limiter 21 and the plane ^ -Ψ of the lower part 8a of the upper section 8 during the pressing (compaction) of the mixture will correspond to the height of the entrance of the upper section 8 into the loading zone Ό of the lower section 7. For example, to increase the density of the coating, it is necessary to increase the distance N and vice versa.

After the mixture is prepared, it is discharged into the hopper 5, and a sheet coating Υ is laid on the heated bottom part 7b of the lower section 7, located in front of the hopper 5. In this position of the mold 3, the stopper 16 abuts against the outer surface of the lower part 7a, and the bottom part 7b is raised up (see FIG. 4, position I).

Further, during the rotation of the table 1 in the direction B, the lower section 7 with the laid sheet material Υ moves to the hopper 5, in front of which the rail 15 is interrupted and the rod 13 with the bottom part 7b and the sheet material Υ are lowered down. After that, the lower section 7 of the mold 3 goes under the hopper 5, and the mixture is unloaded for the lower coating layer (see FIG. 4, position II). Unloading is carried out until the loading area зоны is completely filled.

After that, during the rotation of the table 1 in the direction B loaded with the sheet material смесь and the mixture for the upper coating layer, the lower section 7 leaves the hopper 5, closes with the upper section 8 of the mold 3 and moves under the press 4, which exerts pressure on the said upper section 8. In a specific embodiment, the press 4 exerts pressure on the longitudinal elements 19 of the upper section 8 included in the loading zone Ό of the lower section 7 to a height Ν, thereby sealing the mixture. After the stops 21 abut against the upper end 24 of the side walls 7c of the lower portion 7, the compaction of the mixture in the mold 3 is stopped.

Further, the position of the upper section 8 of the mold 3 is fixed using latches 27, the upper sections 27a of which overlap the longitudinal elements 19 from above, thereby preventing the spontaneous lifting (folding) of the upper section 8 during the period of manufacture of the coating.

After that, during the rotation of the table 1 in the direction B by an angle exceeding 200 °, the loaded mold 3, constantly heated by heating devices 10, moves to the side

- 5 023362 hopper 5, in front of which the upper section 8 is released from the latches 27 and rises up (reclines). When the roller 14 enters the rail 15, the rod 13 begins to rise up together with the bottom part 7b and the made coating. Attendants retrieve the finished coating and move it to the warehouse. Then, sheet material Υ is laid on the bottom part 7b of the vacant lower section 7 (see position I in Fig. 4) and the entire coating production cycle is repeated anew for each revolution of table 1 for each mold 3 mounted on table 1.

Thus, for one revolution of the table 1, a full cycle of manufacturing the coating is carried out, while the rod 13 at the end of the mentioned cycle performs the function of an ejector of the manufactured coating.

Industrial applicability

The above method allows you to make a two-layer coating, which is installed with the lower layer on the base, for example a concrete slab, or earth, or sandy soil, or another base, while the upper coating layer is facing out and is specific. The resulting coating has virtually no hidden defects, is reliable, has elasticity, which allows it to be classified as safety and used for the construction of sidewalks, children's, sports and other playgrounds, as well as in the form of facing material. The use of sheet material Υ as the top coating layer increases the wear resistance of the manufactured coating and increases its service life.

The above method provides a continuous process for the manufacture of coatings on adjustable molds 3, high productivity with a minimum number of staff, namely two people, one of whom, located in front of the hopper 5, controls the rotation of table 1, also opens the upper section 8, unloads from the lower section 7, the fabricated coating and loads the sheet material Υ for the manufacture of another coating; the second person, located between the hopper 5 and the press 4, closes the upper section 8 loaded with mixtures with the upper section 8 and fixes the position of said upper section 8 with latches 27. The ability to adjust the equipment, namely the loading zone Ό of the lower section 7, the position of the limiters 21 of the upper section 8, the heating temperature of the mold 3, allows you to make a coating of different thickness and / or density. Moreover, the aforementioned coating can be made in one revolution of the table 1.

Claims (9)

CLAIM 1. A method of manufacturing a coating, comprising preparing a mixture for the lower layer of the coating by mixing rubber crumb filler and a binder, characterized in that the prepared mixture is discharged into a hopper installed above the table, made rotatable and equipped with circumferentially installed molds, each of which is equipped with a bottom part, adjustable in height relative to the lower portion of the mold, and heating devices installed in the upper and lower portions of the mold for their heating up to the temperature set by the operator, after heating the molds, preformed sheet material is placed on the bottom of the lower section located in front of the bunker, which is used as the top layer of the coating, and during the table rotation, the lower section with sheet material moves under the bunker, where the unloading of the mixture for the lower layer of the coating is carried out, then the loaded lower section goes out from under the bunker, closes the upper section of the mold and moves under the press, after pressing the position of the upper section of the mold is fixed using clamps and heated by heating devices filled mold moves during rotation of the table to the above bunker, in front of which the upper section is released from the clamps and rises up, then the bottom part of the lower section rises up and pushes the coating from the lower section of the mold, after removing the fabricated coating, sheet material is laid in the vacated lower section, and the whole cycle is made the detection coverage is repeated again for each installed on the mold table. 2. A method of manufacturing a coating according to claim 1, characterized in that the manufacture of the coating is carried out at a constant heating of the mold with heating devices. 3. A method of manufacturing tiles according to claim 1 or 2, characterized in that the mold is heated to a temperature of 100-160 ° C. 4. A method of manufacturing a coating according to claim 1, characterized in that the bottom part of each mold is provided with a rod with a limiter of its vertical movement. 5. A method of manufacturing a coating according to claim 1, characterized in that each mold is provided with limiters moving down the bottom part. 6. A method of manufacturing a coating according to claim 1, characterized in that each mold is provided with a heating device located along the perimeter of the side walls of the lower portion. 7. A method of manufacturing a coating according to claim 1, characterized in that the coating is made for one revolution of the table. 8. A method of manufacturing a coating according to claim 1, characterized in that in a mixture for the lower layer, a rubber crumb filler of a fraction of 2-12 mm and a binder based on polyurethane are used. - 6 023362 9. A method of manufacturing a coating according to claim 1, characterized in that the sheet material is made of a filler in the form of a crumb rubber fraction of 1-3 mm and a binder based on polyurethane with the addition of a pigment dye.