CH706367B1 - Body for cleaning and / or grinding. - Google Patents

Abstract

The present invention relates to a body for cleaning and / or grinding 1 for machining, comprising a base body 10 which is provided on a first side 12 with a resilient, knobbed surface 14, wherein the knobbed surface nubs 18 and Noppentäler 17 has; a processing layer 20 disposed on the dimpled surface 14 of the body 10; and wherein the base body 10 has a plurality of passages 11 each in the region of Noppentälern 17.

Description

Description 1. Field of the Invention The invention relates to a body for cleaning and / or grinding, in particular for the machining of structured floor coverings and for the fine sanding of smooth abrasive surfaces. The bodies for cleaning and / or grinding are used in particular to clean difficult-to-maintain plastic floor coverings with structured surfaces. The bodies for cleaning and / or grinding can also be used to abrade floor coverings with textured surfaces so that they can be recoated. 2. Description of the Prior Art Plastic floor coverings are used in many applications, for example in health care, industry and commerce, airports, office and administrative buildings and residential buildings. In addition to plastic floor coverings with a flat surface, those with a pronounced surface structure are available which make the floor coverings appear more natural or reduce the risk of slipping. For example, floor coverings with a slate structure, wood structure, hammered surface or round knobs are known. The structuring may be a few millimeters high.

Thorough cleaning and grinding of such coverings represents a major, yet not optimally solved problem. Known cleaning products and systems, such as brushing machines with brush rollers or single-disc machines, tri-machines or cleaning machines, which are used in conjunction with grinding or cleaning pads will not reach deeper points of the profiled surface, so that a thorough cleaning or processing of the entire surface is not possible. In particular, dirt can be removed badly from deeper points of the profiled surface, since the grinding or cleaning agents reach only the raised areas of the structured surface of the floor covering. If soft brush rollers are used, although the deeper points of the surface structure of the soil are achieved, but the overall cleaning effect is very low.

In order to increase the useful life of the plastic floors and to improve the visual appearance of the coverings, plastic floors are also coated with PU lacquer. When refurbishing such PU-coated flooring, the old PU coating must be sanded before the floor can be recoated. However, in the prior art, no abrasive products have been known which could thoroughly sand down textured floor coverings. Even compliant grinding wheels always grind only the elevations of the flooring, while the wells remain unprocessed.

From DE 20 215 389 U1 a grinding body is known in particular for cleaning surfaces, which has a base body which has at least on one side an abrasive, wherein the base body has elevations on the side at which the abrasive is present. In this way, it is advantageously achieved that substances removed from the surface to be ground or polished or abrasion of the grinding body can collect in the cavities formed by the elevations. On the other hand is achieved by the surveys that increases the abrasion of the grinding wheel. In addition, active substances embedded through the elevations in additives are to be released in a more targeted manner. However, it is not clear how such a grinding wheel would be suitable for the machining of structured floor coverings.

Furthermore, pot and dishwashing sponges are known which have a resilient, slightly profiled surface. These pot and dishwashing sponges are used for manual dishwashing, have no defined removal rate and are inherently not suitable for machine tillage.

Furthermore, polishing sponges are known with a resilient, profiled surface, which are used together with liquid polishing agents for polishing car paint surfaces. The polishing sponges themselves have no abrasive or cleaning action.

From EP 2 353 484 A1 a grinding and cleaning body for machining of structured floor coverings is known, which has a main body which is provided on a first side with a resilient, profiled surface and has a processing layer which on the profiled surface of the base body is arranged. The grinding and cleaning body may further comprise a Velcro adaptation layer, which is arranged on a second, the first side opposite side of the base body, or the processing layer may comprise embedded in synthetic resin abrasive grains.

Such a grinding and cleaning body has a good grinding and cleaning performance, especially in structured floor coverings. However, it has the disadvantage that worn abrasive or dirt particles are thrown to the outside and thus contamination of the environment takes place.

The present invention therefore has for its object to provide an improved body for cleaning and / or grinding for machining of structured floor coverings, in which the contamination of the environment is avoided by grinding or dirt particles. 3. Summary of the Invention The above object is achieved by a body for cleaning and / or grinding for machining according to claim 1. In particular, the above-mentioned object is achieved by a body for cleaning and / or grinding for machining a base body provided on a first side with a resilient, knobbed surface, wherein the knobbed surface nubs and Noppentäler has. The body for cleaning and / or grinding further comprises a processing layer, which is arranged on the dimpled surface of the base body, wherein the base body further comprises a plurality of passages each in the region of Noppentälern.

Due to the nub structure arise elevations on the body and also corresponding elevations of the processing layer, so that the processing layer is pressed by the body in deeper places of the structured surface of the floor covering. In other words, because the processing layer is arranged on a dimpled, resilient surface of the base body, deeper areas of a structured floor covering can also be achieved with the body for cleaning and / or grinding, and these deep areas can thus be mechanically ground or machine-cleaned. The yielding notching or profiling also presses the processing layer into the deep points of the soil structure.

The plurality of passages in the body allows an effective and rapid suction of abrasive and / or dirt particles through the body for cleaning and / or grinding through. The resulting grinding dust collects during grinding in the Noppentälern, which usually form a cavity, and can be sucked through from there through the passages.

The body for cleaning and / or grinding is additionally very well ventilated, and hot running of the body for cleaning and / or grinding and damage to the floor covering by the heat are avoided.

The removal of the abrasive and / or dirt particles takes place through the body for cleaning and / or grinding through to the back and in the optional Klettadaptionsschicht also in the transverse direction. It is therefore not necessary for the passages in the base body to correspond exactly to the suction openings of a suction device, that is to say that the passages are in alignment with suction openings and / or their number, size and arrangements are identical.

Sanding tests have also shown that the inventive body for cleaning and / or grinding is also suitable for fine grinding of flat or curved smooth surfaces. In particular, it is advantageously usable with rotating machine tools (e.g., angle grinders). Due to the yielding nubs, there are no pronounced sanding marks on the possible tilting of the tool. Therefore, for example, grinding or polishing of mineral materials has achieved particularly good results without grinding marks. In addition, the use of rotary machine tools significantly increases the removal rate compared to the oscillating machine tools commonly used to grind or polish mineral materials (e.g., orbital sander).

The passages preferably extend in the axial direction of the body for cleaning and / or grinding through the base body. The axial direction of the main body is understood to mean a direction perpendicular to the radial extent of the body for cleaning and / or grinding or parallel to a possible direction of rotation. The passages can run parallel to the axial direction of the body for cleaning and / or grinding or inclined.

The arrangement and shape of the passages can be arbitrarily adapted to the operating conditions, the floor covering and the desired grinding and cleaning results. Thus, both the shape and size of the cross-section of the passages (e.g., round or square) and the number and location of the passages (rather at the periphery or in the center of the body for cleaning and / or grinding) are variable. Furthermore, it is possible to combine different passages with each other and so e.g. To arrange smaller diameter passages in the center of the body for cleaning and / or grinding, while at the edge of the body for cleaning and / or grinding larger passages are provided which extend not only through the body, but also through the processing layer.

The passages may account for between 0.5 and 20 percent of the total surface area of the body, preferably between 1 and 15 percent, and more preferably between 2 and 10 percent.

Preferably, the processing layer in a resin embedded abrasive grains. Such abrasive grains consist for example of sandstone, pumice, quartz, corundum, silicon carbide or similar hard materials. They cause the actual grinding or cleaning action of the body for cleaning and / or grinding. For secure attachment of the abrasive grains on the body they are embedded in a synthetic resin. Usually, the abrasive grains have a defined grain size, so that the abrasive effect of the body for cleaning and / or grinding can be adapted to the material to be ground and the desired surface roughness and the removal rate.

In a further preferred embodiment, the processing layer has a non-abrasive or scouring agent-free synthetic resin coating. If the soil surface is not to be abraded, but only to be cleaned by strongly adhering soiling, the processing layer need only have a scouring-free synthetic resin coating without abrasive grains. This scouring agent-free synthetic resin coating can, for example, have an open-pored or fleece-like finish. This is a good cleaning effect by the synthetic resin

Stratification achieved, the surface of the flooring is not attacked and thereby spared. In particular, firmly adhering wax layers can be easily removed hereby.

Preferably, the processing layer is flocked, in particular with an artificial or natural fiber, or with melamine resin foam particles. Flocking with artificial or natural fibers or with melamine resin foam particles also increases the cleaning effect of the body for cleaning and / or grinding and penetrates in particular in very fine structures of the flooring without damaging the flooring. Also hereby very well firmly adhering dirt or old wax layers can also be removed from recesses of the floor covering, without attacking the surface of the floor covering.

In a preferred embodiment, the base body and the machining layer of at least one resilient rubber-like material, wherein the processing layer or the processing layer and the base body are interspersed with abrasive grain. In particular, bodies for cleaning and / or grinding can be made with comparatively small nubs, in which the abrasive grain is "rubber bounded", i. is embedded in a rubbery elastic material. Such bodies for cleaning and / or grinding are particularly suitable for processing soils with a low surface structure, for example a hammered structure. It is advantageous that rub-over-bound bodies have a very long service life for cleaning and / or grinding. In addition, you can easily produce by injection molding, without further coating operations are necessary.

With the help of in resin - or a similar material - firmly embedded abrasive body a defined cleaning or grinding effect is achieved, which can be adapted to the particular material and the desired grinding or cleaning task exactly. In addition, embedding ensures that the abrasive grains adhere securely even under dynamic load due to the resilient profiled surface and immersion in deeper-lying soil structures and so a good life of the body is guaranteed for cleaning and / or grinding. In particular, such bodies are suitable for cleaning and / or grinding large and heavy tillage machines, which are equipped with a bristle plate. Here, the body is simply placed on the floor for cleaning and / or grinding and the tillage machine placed on it, which then moved with the bristle plate the body for cleaning and / or grinding by friction.

By means of a Velcro adaptation layer, which can be arranged on a second side of the main body opposite the first side, the body for cleaning and / or grinding can be easily and safely mounted on a corresponding machine, e.g. an angle grinder with rotating sanding pad, with good power transfer from the machine to the body for cleaning and / or sanding. Preferably, the passages do not pass through the hooket adaptation layer. More preferably, the Velcro adaptation layer on a Velcro velor layer. A Velcro velor layer connects very well with a hook layer of a Velcro system and thus ensures an even better slip-free power transmission from the machine to the body for cleaning and / or grinding. As already mentioned, the Velcro adaptation layer also serves to transport dust from the passages of the main body to the suction openings of the processing machine.

Preferably, the passages do not pass through the Velcro adaptation layer, so that they can consist of a continuous layer and no passages must be introduced, and it is sufficient if the body is provided with passages.

Preferably, the passages are configured as openings at the lowest points of the Noppentäler. This has advantages on the one hand when grinding or cleaning, since here the removed dust or dirt accumulates and can be easily sucked off, and on the other hand, such passages can be easily made by cutting the knobbed body, the cutting blade is set so that at the Noppentälern Openings are created. Thus, the passages do not have to be introduced in an additional operation. The passages are therefore co-produced in the napping of the body by the cutting process.

Preferably, the nubs have a pyramidal shape, a truncated pyramidal shape, a conical shape, a truncated cone shape or in Guerschnitt a waveform. In the pyramid shape and conical shape, comparatively sharp elevations of the knobs result, so that finely structured floor coverings can be better processed. In the truncated pyramid shape and truncated cone shape results in a flattened tip, which is advantageous for coarser textured floor coverings, especially for Noppenbeläge. Also, the removal rate of such studded shapes is better than with pointed shapes. When viewed in the guerschnitt waveform, the nubs have a rounded tip and then go into a rather blunt nubs area. This makes them suitable for both fine and coarser textured floor coverings. The waveform is also very easy to customize.

Preferably, the knobs have a height of 2 mm to 50 mm, more preferably a height of 10 mm to 20 mm. With such dimensions, a good balance is achieved between the flexibility of the nubs and the rigidity of the nubs required for the cleaning effect.

Preferably, the studs to each other at a distance of 3 mm to 50 mm, more preferably 10 mm to 20 mm. With such distances, the body used for cleaning and / or grinding can be optimally adapted to the particular floor covering. This ensures on the one hand that also fine depressions of the floor covering can be processed, but on the other hand, a high removal rate is given on the surface.

Preferably, the base body consists of a resilient foam material. Such resilient foam material is very easy to produce in the desired hardnesses and with the desired profiled surface. Furthermore, flexible foam material can be provided or coated very well with a processing layer.

Preferably, the foam material has a compressive strength according to DIN 53577 or ISO 3386 of 20-60 (2-6 kPa at 40% material compression). Thus, the foam material on the one hand soft enough to press the knobs with the processing layer in the recesses of the floor covering, on the other hand, this compressive strength ensures a sufficient contact pressure and thus a good removal rate.

Preferably, the base body has a thickness of 10 mm to 60 mm, more preferably from 15 mm to 30 mm and more preferably from 20 mm to 25 mm. Such thicknesses of the body provide the required compliancy of the body for cleaning and / or grinding, which ensures that the processing layer can penetrate with necessary pressure into deeper areas of the structured surface, while other profiled surface areas of the processing layer machine higher areas of the floor covering can.

Preferably, the base body consists of a resilient plastic material. Instead of a foam material, a compliant plastic material for the base body with the profiled surface can also be used. Then preferably the knobs can be equipped with a resilient bellows.

In a preferred embodiment, the processing layer on an elastic abrasive grain carrier - in particular a nonwoven fabric - on which covers the knobs and coated with abrasive grain. Even a partial overlap of the knobs, such as the nub tip with an abrasive grain carrier, is possible. The use of an elastic abrasive grain carrier increases the service life of the body for cleaning and / or grinding, in particular if a comparatively soft foam material is used for the base body.

Preferably, the passages make up between 0.5 and 20 percent of the area of the processing layer, more preferably between 1 and 15 percent and more preferably between 2 and 10 percent.

In a preferred embodiment, the body is designed for cleaning and / or grinding as a round disk, as a rectangular blank or in delta format. Thus, the body can be adapted for cleaning and / or grinding on the particular machine with which it is used.

The above-mentioned object is also achieved by a method for the machining of in particular structured floor coverings, comprising the following steps: a) providing a floor cleaning machine, a floor grinding machine or a machine tool: b) providing a body for cleaning and / or grinding a base body provided on a first side with a resilient dimpled surface, the dimpled surface having knobs and dimples, and a processing layer disposed on the dimpled surface of the base body, and wherein the base body has a plurality of apertures respectively in the body Area of Noppentälern has; c) attaching the body to the floor cleaning machine, floor grinder or machine tool for cleaning and / or grinding: d) machining a textured floor covering with the floor cleaning machine or floor grinding machine, wherein areas of the compliant dimpled surface of the body for cleaning and / or grinding into deep areas of the penetrate textured flooring, or edit a smooth surface of a workpiece with the machine tool: e. Extracting sanding dust or contaminants through the passages.

Again, deeper bodies of a structured floor covering can be achieved with the body for cleaning and / or grinding and thus ground or machine cleaned with a tillage machine, because the processing layer is arranged on a dimpled resilient surface of the base body. So that a floor covering with a textured surface can be thoroughly cleaned and completely sanded off, which was previously only possible for the raised areas of the floor covering. By sucking through the passages worn abrasive dust and impurities can be effectively dissipated. This results in a dust-free grinding and - since clogging of the processing layer is avoided - a significant increase in the life of the body for cleaning and / or grinding.

Preferably, the step of attaching the body for cleaning and / or grinding to a floor cleaning machine comprises the step of merely placing the floor cleaning machine or the floor grinding machine on the body lying on the floor for cleaning and / or grinding. The attachment of the body for cleaning and / or grinding on the floor cleaning machine can be done simply by placing the machine on the body for cleaning and / or grinding, as this is usually difficult enough to move the body for cleaning and / or grinding by stiction , An optional bristle plate of the floor cleaning machine supports this attachment by static friction. Velcro systems are not necessary here.

Preferably, a body as described above for cleaning and / or grinding for machining structured floor coverings by means of e.g. rotating or vibrating tillage machine or hand grinder used.

For producing an abovementioned body for cleaning and / or grinding, the resilient base body can be preformed in a knobbly shape and cut with a knife in such a way that the passages are produced during cutting of the base body. For this purpose, the knife must be adjusted when napping the body only to a suitable height. A later introduction of passages is unnecessary. 4. BRIEF DESCRIPTION OF THE DRAWINGS In the following, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In which shows:

1 shows a novel body for cleaning and / or grinding in a perspective view on;

2 shows a cross-sectional view of the inventive body for cleaning and / or grinding

Fig. 1;

3 shows a cross-sectional view of a further embodiment of a body according to the invention for

Cleaning and / or grinding:

4 shows a cross-sectional view of the inventive body for cleaning and / or grinding

Fig. 1 with a flocking;

5 shows a cross-sectional view of a further embodiment of the inventive body for Rei nigen and / or grinding with an elastic abrasive grain carrier.

Fig. 6 is a cross-sectional view of another embodiment of the body for cleaning and / or grinding fen with a bellows having nubs; and

Fig. 7A-7E: different knob shapes for a novel body for cleaning and / or grinding fen. 5. Preferred Embodiments Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Features of individual embodiments can be combined with features of other embodiments, even if this is not expressly illustrated.

Figs. 1 and 2 show a body for cleaning and / or grinding 1 according to a first embodiment. The body for cleaning and / or grinding 1 comprises a body 10 having a plurality of e.g. 22 passages 11 in an axial direction provided on a first side 12 with a resilient knobbed surface 14. The dimpled surface 14 includes knobs 18 and notched valleys 17. On the surface 14 is disposed a working layer 20 which, in use, contacts the surface of the floor or other workpiece and effects the actual cleaning or abrasive action. On a second side 16 opposite the first side 12 of the base body, a hook-and-loop-type adhesive layer 30 is attached in this embodiment. With the help of this Velcro adaptation layer, the body can be firmly but detachably fastened to a grinding or cleaning machine for cleaning and / or grinding 1.

As shown schematically in Fig. 2, the profiled surface 14 consists of a plurality of resilient nubs 18. The passages 11 extend through the regions of the base body 10 with a small wall thickness, i. E. through the region of Noppentäler 17. The shape, the size, the number and the arrangement of the passages 11 may be different depending on the application. As shown in Fig. 2, the passages 11 may be e.g. pass through each or only every other Noppental 17. The passages 11 may have different diameters or sizes. A preferred diameter of a cross-sectionally round passage 11 is, for example, 3 mm. Other passages 11 may, for example, have an elliptical shape with diameters of 7x4 mm.

The passages 11 of the embodiment of Figs. 1, 2, 4, 5 and 6 can be used in an additional operation, e.g. be introduced by punching.

Fig. 3 showed a further embodiment in which the passages 11 are generated directly at the nubs of the base body 10. For this purpose, only the cutting blade of a known Noppmaschine needs to be set to a suitable height, so that arise in Noppental 17 immediately when cutting openings 11. This saves an additional operation and ensures that a breakthrough 11 is arranged in each depression valley.

As shown in Fig. 3, also in this embodiment of the body for cleaning and / or grinding 1 on the side 16 a Velcro adaptation layer 30 can be arranged. Since these are usually highly permeable to air and dust, these need not be provided with openings, but may be formed as a continuous layer. It should be noted that the embodiment of Fig. 3 consists of a one-piece base body 10, in which the studs 18 spatially merge into each other and form a coherent composite.

The abraded grinding dust can also flow through the Velcro adaptation layer 30 transversely behind the base body 10, so that the body can be used for cleaning and / or grinding 1 with any machine tools with suction. Due to the dust transport through the Velcro adaptation layer 30 is therefore not necessary that the passages 11 are aligned or aligned with suction openings of the grinding plate of the machine tool. Due to the large number of passages 11 and their arrangement in the field of Noppentäler a very effective dust extraction over the entire surface of the body for cleaning and / or grinding 1 is given. This ensures an excellent grinding result, a good cooling of the grinding surface and prevents clogging of the processing layer 20.

The knobs 18 are preferably made of the same material as the rest of the base body 10 and are formed integrally with the rest of the base body 10. However, they can also be made of a different material. Preferably, a resilient foam material is used as the material for the base body 10. This may consist of, for example, foamed soft polyurethane or foamed rubber. The foam material is elastic and has a compression hardness according to DIN 53577 or ISO 3386 of 20-60. This corresponds to a pressure of 2-6 kPa at 40% compression of the foam.

The shape of the nubs 18 may vary depending on the application. In Fig. 1, the knob shape is a waveform in cross section. Other studded shapes are shown in FIGS. 7A-7E, wherein FIG. 7A shows a base body 10 with conical nubs 18, FIG. 7B a base body 10 with frustoconical nubs 18, FIG. 7C a base body 10 with pyramidal nubs 18, FIG Base body 10 with truncated pyramid-shaped knobs 18 and Fig. 7E in turn shows a base body 10 with a cross-sectionally wave-shaped nubs 18. However, the nubs 18 may also have other shapes and blends of the shapes shown. For the processing of a synthetic floor with a slate structure, it will be expedient to choose a sharpened nub structure, for example a pointed pyramidal structure or conical structure, while for the processing of a floor with a hammered or round knobbed structure a nub that is round at the top will be used. If a high removal rate of the body for cleaning and / or sanding 1 is required, then a nub shape flattened at the point, for example the truncated cone or truncated pyramid shape, should be selected. Thus, the coated with abrasive grain contact surface of the knob 18 to the ground is greater than in pointed knobbed shapes and the grinding thereby more intense.

Usual heights h of the nubs 18 are from 2 mm-50 mm, preferably 10 mm-20 mm. On the one hand, such heights provide the necessary resilience and flexibility of the dimples 18, but are chosen so that at the same time the rigidity and stability of the dimples 18 required for the cleaning and grinding action are given. Preferably, the nubs 18, as seen in Fig. 1, arranged in a regular pattern on the surface 14, wherein the distance a of the nubs with each other is preferably 3 mm-50 mm. The smaller the distance a can be selected, the higher the removal rate of the body for cleaning and / or grinding 1. A distance a of 10 mm-20 mm has been proven for certain grinding and cleaning tasks.

Usual thicknesses D of the main body 10 are 10 mm-60 mm, preferably 15 mm-30 mm and more preferably 20 mm-25 mm. The thickness D of the base body 10, the height h of the nubs 18 and the distance a is chosen so that when using the body for cleaning and / or grinding 1, the compression of the nubs 18 at the required contact pressure of the machine on the ground - or generally on the workpiece - in a range that allows on the one hand a good removal of the material, on the other hand, a good penetration into the deep areas of the surface structure. Experiments have shown that a compression of the nubs of 30-70% provides good grinding and cleaning results in textured plastic floors. Thus, the profiled surface 14 of the body for cleaning and / or grinding 1 of the structure of the flooring can adapt, so that the grinding pressure on the entire grinding surface is approximately equal.

The Velcro adaptation layer 30 may consist of a Velcro velcro or Velcro, which is glued to the second side 16 of the main body 10 with a suitable adhesive. Via the Velcro adaptation layer 30, the body can be attached to a sanding pad or abrasive holder for cleaning and / or grinding 1.

In the embodiment shown in Fig. 1, the processing layer 20 consists of embedded in a synthetic resin or other suitable binder sharp-edged abrasive grains 22, with which the nubs 18 are coated. These abrasive grains 22 consist for example of sandstone, pumice, quartz, corundum, silicon carbide or similar hard materials. The grinding and cleaning action of the inventive body for cleaning and / or grinding 1 can be adjusted by the abrasive grain size. For grinding old PU coatings of plastic floors, a correspondingly coarse abrasive grain 22 of grain size K120-K150 is used, while for cleaning plastic floors, which have slight footprints and are greatly over-cared for, a relatively fine abrasive grain 22 with a

Grain size of K180-K400 or even finer uses. For fine grinding, for example of mineral materials or intermediate grinding of piano lacquer, finer grain sizes of K600 or finer are preferably used.

If the floor is only to be cleaned or polished, the body according to the invention for cleaning and / or grinding 1 on the profiled or grooved surface 12 can also be provided with a coating 24 free from abrasive material as a processing layer 20. This coating 24 may, for example, be a scouring-free synthetic resin coating. This coating 24 may be open-pored or fleece-like. It is also possible to flock the surface 12 with polyester or polyamide fibers, for example, to clean or polish the floor.

It is also possible to make a flock or coating 24 of melamine resin foam particles. Such particles arise as a waste product (cutting dust) when cutting blocks of melamine resin foam. These plastic particles are very open-pored and sharp-edged and are therefore well suited for cleaning floor coverings. On the other hand, they are very gentle on the surface of the floor covering and do not attack it.

As shown in Fig. 5, it is also possible to coat the profiled surface 14 of the body 10 with an adaptive abrasive grain carrier 26, which in turn is coated with abrasive grain 22. This embodiment is used in particular for intensive cleaning or grinding work, for which a relatively coarse abrasive grain 22 is needed. The coarse abrasive grain 22 may be better anchored to the abrasive grain carrier 26 than to the body 10 itself. Furthermore, the abrasive grain carrier 26 provides the body with better stability at the abrasive surface for cleaning and / or grinding 1. Preferably, a non-woven fabric is used as the abrasive grain carrier 26.

Fig. 6 shows a body for cleaning and / or grinding 1, in which the base body 10 consists of a resilient plastic material. Here, the knobs 18 are formed for example of a hollow blow-molded plastic material with resilient bellows 19. These nubs 18 can be coated with the above-described different processing layers 20 (with and without abrasive grain 22, flocking 24 or with and without abrasive grain carrier 26). In such a body for cleaning and / or grinding 1 is also an optimal adaptation of the individual knobs 18 in terms of elasticity, shape and arrangement on the structured surface of the floor to be processed possible. Here, too, an even sanding pressure is guaranteed on all surface areas of the floor covering. Between the knobs 18 17 passages 10 are again in the range of Noppentälern arranged, can be sucked through the grinding dust.

In addition, the base body 10 and the processing layer 20 may also consist of a resilient rubber-like material. The rubbery material of the base body 10 may be different from the material of the processing layer 20. But both layers can also consist of the same rubber-like material. A preferred material is rubbery polyurethane. In particular, the processing layer 20 alone or the processing layer 20 and the base body 10 may be completely interspersed with abrasive grain 22. Thus, the abrasive grain 22 is "rubber bounded", i. embedded or embedded directly in the rubber-like elastic material, so that coating operations can be omitted.

It should be noted that according to the invention bodies for cleaning and / or grinding 1 are of course equally equally suitable for processing structured and flat plastic, rubber, wooden floors, especially plank floors, marble and porcelain floors. Further applications of bodies for cleaning and / or grinding 1 are in the grinding of uneven and structured surfaces, for example in aircraft construction.

In a further embodiment of a body according to the invention for cleaning and / or grinding 1 (not shown), the second side 16 is not provided with a hook and loop adaptation layer 30. This embodiment is therefore particularly suitable for tillage machines, which have one or more turntables. Here, the tillage machine (especially a floor cleaning machine) can be easily placed on the body lying on the ground for cleaning and / or grinding 1, so that it is moved by friction from the corresponding turntable. To improve the friction of the turntable may be provided on its underside with bristles, which penetrate into the second side 16 of the body 10. An anchorage via a Velcro system is not necessary in this case.

The inventive bodies for cleaning and / or grinding 1 are particularly suitable for use with such tillage machines. However, they can also be used with other grinders, such as hand grinders or angle grinders. In any case, the outer contour of the body for cleaning and / or grinding 1 is then adapted to the shape of the respective tool holder of the grinding machine. Usual forms are round, rectangular or the so-called delta format. When used with single-disc tillage machines, the bodies for cleaning and / or grinding 1 have a round outer contour and a diameter of 370 mm-500 mm, depending on the machine.

LIST OF REFERENCES [0065] 1 body for cleaning and / or grinding 10 main body

Claims (16)

A body for cleaning and / or grinding (I) for machining, comprising: a) a base body (10) provided on a first side (12) with a resilient, knobbed surface (14), wherein the dimpled surface Nubs (18) and Noppentäler (17) has; b) a processing layer (20) disposed on the dimpled surface (14) of the base body (10); and wherein c) the main body (10) has a plurality of passages (11) in each case in the region of Noppentälern (17). A body for cleaning and / or grinding according to claim 1, wherein said processing layer (20) comprises abrasive grains (22) embedded in a synthetic resin. A body for cleaning and / or grinding according to claim 1, wherein said processing layer (20) comprises a non-abrasive synthetic resin coating (24). 4. body for cleaning and / or grinding according to claim 1 or 3, wherein the processing layer (20) is flocked, in particular with an artificial or natural fiber (24) or flocked with melamine resin foam particles. 5. body for cleaning and / or grinding according to claim 1, wherein the base body (10) and the processing layer (20) consist of at least one resilient material, wherein the processing layer (20) or the processing layer (20) and the base body (10). are interspersed with abrasive grain. 6. body for cleaning and / or grinding according to one of claims 1-5, further comprising a Velcro adaptation layer (30) which is arranged on a second, the first side opposite side (16) of the base body (10). The body for cleansing and / or grinding according to claim 6, wherein the passages (11) do not extend through the hooket adaptation layer (30). 8. A body for cleaning and / or grinding according to any one of claims 1-7, wherein the passages (11) extend in the axial direction of the body for cleaning and / or grinding (1) through the base body (10) therethrough. 9. body for cleaning and / or grinding according to one of claims 1-8, wherein the passages (11) are designed as openings at the lowest points of the Noppentäler (17). The body for cleaning and / or grinding according to any one of claims 1-9, wherein the nubs (18) have a pyramidal shape, a truncated pyramidal shape, a conical shape, a truncated cone shape or a wave form in cross-section. 11. body for cleaning and / or grinding according to any one of claims 1-10, wherein the nubs (18) have a height (h) of 2 mm-50 mm, preferably 10 mm-20 mm and / or the knobs (18) each other at a distance (a) of 3 mm-50 mm, preferably 10 mm-20 mm. 11 passage 12 first side 14 dimpled surface 16 second side 17 dimple 18 dimpling 19 bellows 20 processing layer 22 abrasive grains 24 abrasive-free coating, flocking 26 abrasive grain carrier 30 hook-and-loop layer Patent claims 12. body for cleaning and / or grinding according to any one of claims 1-11, except claim 5, wherein the base body (10) consists of a resilient foam material which preferably has a compression hardness according to DIN 53 577 or ISO 3386 of 20-60 , 13. A body for cleaning and / or grinding according to any one of claims 1-12, wherein the base body (10) has a thickness of 10 mm-60 mm, preferably 15 mm-30 mm and more preferably 20 mm-25 mm. 14. body for cleaning and / or grinding according to one of claims 1-13, wherein the processing layer (20) comprises an elastic abrasive grain carrier (26), in particular a non-woven fabric, which covers the knobs (18) and coated with abrasive grain (22) , The body for cleaning and / or grinding according to any one of claims 1-14, wherein the passages (11) make up between 0.5 and 20 percent of the area of the processing layer (20), preferably between 1 and 15 percent, and more preferably between 2 and 10 percent. 16. A method for the machining of in particular structured floor coverings, comprising the following steps: a) providing a floor cleaning machine, a floor grinding machine or a machine tool; b) providing a body for cleaning and / or grinding (1) with a base body (10) provided on a first side with a resilient knobbed surface (14), wherein the knobbed surface (18) nubs and Noppentäler (17) and with a processing layer (20) disposed on the dimpled surface (14) of the base body (10), and wherein the base body (10) has a plurality of passages (11) each in the region of Noppentälern (17); c) attaching the body for cleaning and / or grinding (1) to the floor cleaning machine, floor grinding machine or machine tool; d) processing a structured floor covering with the floor cleaning machine or the floor grinding machine, wherein areas of the compliant dimpled surface (14) of the body for cleaning and / or grinding (1) penetrate into deep areas of the structured floor covering, or machining a smooth surface of a workpiece with the machine tool; e) sucking off grinding dust or contaminants through the passages (11).