EP1177861A2 - Sanding belt for belt sanding machine - Google Patents
Sanding belt for belt sanding machine Download PDFInfo
- Publication number
- EP1177861A2 EP1177861A2 EP01103306A EP01103306A EP1177861A2 EP 1177861 A2 EP1177861 A2 EP 1177861A2 EP 01103306 A EP01103306 A EP 01103306A EP 01103306 A EP01103306 A EP 01103306A EP 1177861 A2 EP1177861 A2 EP 1177861A2
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- EP
- European Patent Office
- Prior art keywords
- abrasive
- layer
- carrier
- sanding
- belt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
- B24B55/08—Dust extraction equipment on grinding or polishing machines specially designed for belt grinding machines
Definitions
- the invention relates to an abrasive belt for a belt sander with an abrasive layer and a backing to transfer drive power to the Abrasive layer.
- an endless belt is at least two roles, of which at least one is driven.
- the grinding layer outside i.e. on the side facing away from the rollers, while the carrier rests on the rollers. If now the rollers are rotated, the carrier is moved and with it the abrasive layer on the outside of the tape.
- a pressure shoe is arranged on one run of the grinding belt, with the help of the moving sanding belt be pressed against a surface to be ground can to create a certain grinding pressure.
- Such grinding belts are preferably used for grinding used by flat surfaces.
- belt sanders can be trained as both portable hand tools be as well as stationary tools.
- the grinding dust has therefore already been proposed vacuum from the sanding belt.
- vacuum from the sanding belt For this is in the belt sander in the area of a pulley suction device acting on the outside of the grinding belt provided that the grinding dust from the surface vacuum the grinding layer again.
- the effectiveness of such a suction is limited.
- the invention is based, which Improve sanding dust removal from sanding belts.
- This task is the beginning of a grinding belt mentioned type solved in that the grinding layer is designed to flow through particles, between the Abrasive layer and the carrier a particle flow Intermediate layer is arranged and the carrier can flow through particles is trained.
- the sanding dust can be removed at the point of origin, i.e. he does not stay or only for a very short period of time on the surface of the grinding layer.
- the particle flow through the sanding belt i.e. the one in an air stream guided grinding dust, first penetrates the Abrasive layer.
- an intermediate layer is arranged on the grinding layer, which can also flow through particles. In this intermediate layer the sanding dust has the opportunity to Way to choose which is no longer perpendicular to the Grinding plane is directed.
- the sanding dust can rather, if necessary, also parallel to Move the grinding layer. This enables him to work on one suitable place to penetrate the wearer who also is designed to flow through particles.
- the carrier is formed from a particle-impermeable material and has a large number of holes which are distributed substantially uniformly over its surface.
- a particle flow impermeable material can be used for the carrier does not limit the choice of materials for the carrier.
- the same backing materials can be used as with conventional sanding belts.
- the material can be selected in particular with regard to the strength that the carrier must have.
- the carrier material should in particular be tear-resistant. Overall, however, it is sufficient if the combination of the grinding layer, intermediate layer and carrier is sufficiently tensile. If necessary, the carrier can also be formed by part of the intermediate layer. The particle flow through the carrier is ensured in that the carrier has a plurality of holes which are evenly distributed over its surface.
- holes may have been created by perforation, for example.
- the fact that the holes are evenly distributed over the surface does not mean that a regular pattern is essential. It is only necessary that the ratio of the opening area to the remaining carrier area is essentially constant over the entire area of the carrier, if one considers area sections of a few square centimeters in size, for example 10 cm 2 or less.
- the holes are preferably at a maximum distance to each other depending on the intermediate layer is selected so that an almost dust-free particle stream from the grinding layer through the intermediate layer can be generated through the holes. Accordingly the holes can be all the more apart the lighter the dust particles in parallel can flow to the carrier through the intermediate layer.
- the intermediate layer is preferably open-pored Foam trained.
- a foam can, for example realized by a layer of foam his.
- the foam layer allows the dust particles basically a movement in all directions.
- the Dust can therefore be in the foam layer from the Flow the grinding layer to the individual holes in the carrier.
- the intermediate layer is preferably elastic.
- a flow path for the The particle flow is provided by Intermediate layer also function, the sanding belt in to be flexible to a certain extent, so that one can achieve smoother surfaces.
- the carrier is preferably made of paper, fabric or Film formed. These materials have proven their worth. They can transmit high tensile forces and are relative inexpensive. A plastic film is preferably used as the film used. But you can also use a fleece or a use a different, less tensile material if that Otherwise the sanding belt is overall tensile or on other way can work.
- the abrasive layer preferably has one Abrasive backing made from a particle stream impermeable Material on a flat arrangement of a Has a large number of perforation openings. Applies here basically a view similar to that for the Carrier.
- the perforation openings are arranged so that the dust created during grinding is no larger Cover stretches on the surface of the abrasive layer must, but relatively quickly into the next perforation can be sucked in.
- the perforation openings don't have to be in a predetermined pattern be arranged, although this facilitates manufacturing.
- the use of an impermeable particle stream Materials has the advantage that you can also use it for use the abrasive backing on materials can, which have proven themselves in practice.
- the particle flow permeability is through the perforation openings reached.
- the perforation openings preferably have one Diameters in the range of 0.5 to 5 mm and neighboring Perforation openings a maximum distance from each other from 20 mm, with the maximum distance of the edge to the next perforation opening is 15 mm.
- the distances between neighboring ones Perforation openings and the distance of the edge on each Even add to the next perforation even smaller values, for example in the order of magnitude of 10 mm. This means that relatively short distances are prepared put the sanding dust on the surface of the sanding belt must be put back in before next perforation opening can be sucked in.
- the abrasive backing is preferably made of paper, Tissue or film formed.
- a film in particular a plastic film can be used.
- On this Materials can be abrasives, for example fasten the abrasive grain.
- the grinding layer is designed as a grinding grid.
- abrasive grille can be particularly create fine cuts.
- the particle stream can pass through the openings that are formed by the individual meshes of the grid.
- FIG. 1 schematically shows a belt grinding machine 1, in which an abrasive belt 10 around two deflection rollers 2, 3 is placed and tensioned, of which the pulley 3 has a drive 4.
- the one for tensioning the sanding belt 10 necessary funds are not shown.
- the sanding belt 10 is through the deflection roller 3rd driven in the direction of an arrow 5.
- a pressure shoe 6 is on the inside of the grinding belt 10, more precisely its free run arranged. With help of the pressure shoe 6, the lower run of the Abrasive belt 10 are pressed against a surface, to grind them.
- a suction device 7 is provided, which is represented by a fan 8 shown schematically should be symbolized.
- Fig. 2 shows a first embodiment of the grinding belt 10 in cross section.
- the grinding belt 10 has one Abrasive layer 11, which is formed by a Abrasive backing 12, for example made of paper, tissue or a plastic film on which an abrasive grain 13 or another abrasive is attached, for example by gluing or embedding in a plastic matrix.
- the abrasive backing 12 is made of a material which is inherently impermeable to particle flow, i.e. the material itself is so dense that there are no dust particles can step through.
- the Abrasive backing 12 with a plurality of perforation openings 14 provided that are large enough to the To allow passage of dust.
- the arrangement of this Perforation openings can be seen from FIG. 4.
- the perforation openings 14 have a diameter in Range from 0.5 to 5 mm. As a rule, this lies Diameter at about 1 mm.
- the perforation openings 14 can basically be any Form as long as it is ensured that Dust created during grinding through the perforation openings 14 can pass through.
- the perforation openings 14 penetrate the grinding layer complete, i.e. also the abrasive grain.
- the maximal Distance between two adjacent perforation openings 14 is 20 mm.
- Even the maximum Distance of the edge 15 (parallel to the direction of movement 5) to the next perforation opening 14 is included 20 mm. It is therefore guaranteed that the grinding Grinding dust generated cover this distance at most must before entering the nearest perforation 14 can be sucked in.
- An intermediate layer 16 is arranged on the abrasive carrier 12, which is made of foam.
- the foam 16 is open-pore, i.e. he is also particle stream-permeable.
- the particle flow is here but not in a direction perpendicular to the extension of the abrasive carrier 12 limited, but the particle flow can be in the intermediate layer 16 basically move in any direction.
- the main direction of the particle flow is indeed from the Abrasive layer 11 run to a carrier 17 which is on the pulleys 2, 3 rests. As part of this movement but flow paths will definitely develop, the one component parallel to the extension of the Have abrasive backing 12.
- the carrier 17 is here tensile, i.e. it is not worth mentioning stretched when driven by rollers 2, 3 becomes. Basically, it is sufficient if this Tensile strength in the sanding belt 10 given overall is. If the intermediate layer 16 is stable enough, can they also take on the function of the carrier 17, i.e. the carrier 17 is then part of the intermediate layer 16 trained.
- the carrier 17 is also formed from a material which is inherently impermeable to particle flow.
- the grinding layer 11 is similar Carrier 17 perforated. This is for example from Fig. 5, which is a top view of the carrier 17 Holes 18 shows.
- FIGS. 4 and 5 make clearly that the arrangement of the perforation openings 14 and the holes 18 need not match, i.e. it a hole 18 does not have to lie opposite each perforation opening 14, although this is of course possible.
- the Particle flow through the perforation openings 14 rather, it seeks its way through the Intermediate layer 16 until it passes through the holes 18 of the carrier 17 can kick.
- the holes 18 of the carrier 17th have a diameter in the range of 0.5 to 3 mm, preferably 1 mm, and a maximum distance from each other of 20 mm, preferably 7 to 10 mm.
- the distance too the holes 18 to the edge 19 is a maximum of 20 mm. This distance can generally be chosen to be larger than the distance of the perforation openings 14 to Edge 15 of the grinding layer 11.
- Fig. 3 shows a modified embodiment of a Abrasive belt 10 ', in which the abrasive layer 11' is different is trained.
- the abrasive layer 11 ' is now formed by a grinding grid 20, i.e. on net-like or lattice-like fabrics, on the webs the abrasive grain 13 is attached.
- the particle flow can pass through the mesh of the grinding grid 20 and through the intermediate layer 16 to the holes 18 arrive in the carrier 17.
- the sanding belt 10 in operation to one grinding surface put on and set in motion is mainly created in the area of the pressure shoe 6 Abrasion in the form of grinding dust.
- the suction device 7 generates an air flow through the grinding belt 10, which ensures that the with the grinding belt 10 in the direction of the suction device 7 transported sanding dust directly can be sucked through the grinding belt 10, 10 ' can.
- the intermediate layer 16 serves as a distributor, i.e. it ensures that the through the perforations 14 or the grating 20 passing through Grinding dust to such holes 18 in the carrier 17th can get that are under negative pressure.
- the sanding dust becomes permanent and reliable removed so that the abrasive layer 11, 11 'does not closes and the sanding belt 10, 10 'thus a longer Has service life.
Abstract
Description
Die Erfindung betrifft ein Schleifband für eine Bandschleifmaschine mit einer Schleifschicht und einem Träger zur Übertragung einer Antriebsleistung auf die Schleifschicht.The invention relates to an abrasive belt for a belt sander with an abrasive layer and a backing to transfer drive power to the Abrasive layer.
Bei Bandschleifmaschinen wird ein Endlosband über mindestens zwei Rollen gelegt, von denen mindestens eine angetrieben ist. Hierbei befindet sich die Schleifschicht außen, d.h. auf der den Rollen abgewandten Seiten, während der Träger auf den Rollen aufliegt. Wenn nun die Rollen gedreht werden, wird der Träger mitbewegt und damit auch die Schleifschicht auf der Außenseite des Bandes. In der Regel ist an der Innenseite eines Trums des Schleifbandes ein Anpreßschuh angeordnet, mit dessen Hilfe das sich bewegende Schleifband gegen ein zu schleifende Oberfläche gedrückt werden kann, um einen gewissen Schleifdruck zu erzeugen. In belt grinders, an endless belt is at least two roles, of which at least one is driven. Here is the grinding layer outside, i.e. on the side facing away from the rollers, while the carrier rests on the rollers. If now the rollers are rotated, the carrier is moved and with it the abrasive layer on the outside of the tape. Usually is on the inside a pressure shoe is arranged on one run of the grinding belt, with the help of the moving sanding belt be pressed against a surface to be ground can to create a certain grinding pressure.
Derartige Schleifbänder werden vorzugsweise zum Schleifen von ebenen Flächen verwendet. Bandschleifmaschinen können sowohl als tragbare Handwerkzeuge ausgebildet sein als auch als stationäre Werkzeuge.Such grinding belts are preferably used for grinding used by flat surfaces. belt sanders can be trained as both portable hand tools be as well as stationary tools.
Beim Schleifen entsteht ein Schleifstaub, der gewisse Probleme mit sich bringt. Zum einen führt der Schleifstaub zu einer gewissen Umweltbelastung, die für eine Bedienungsperson durchaus gesundheitsschädliche Folgen haben kann. Zum anderen setzt der Schleifstaub auch die Schleifschicht zu, so daß sich die Wirksamkeit der Schleifschicht vermindert. Dementsprechend hat das Schleifband in manchen Fällen eine Standzeit, die weitaus geringer ist, als es durch die Abnutzung der Schleifschicht zu erwarten wäre.Grinding dust creates a certain amount Brings problems. On the one hand, the Grinding dust to a certain environmental impact, which for an operator is quite harmful to health Can have consequences. On the other hand, the grinding dust also the grinding layer too, so that the effectiveness the grinding layer is reduced. Accordingly, that has Sanding belt in some cases has a long service life is less than that due to wear and tear on the Abrasive layer would be expected.
Man hat daher bereits vorgeschlagen, den Schleifstaub vom Schleifband abzusaugen. Hierzu ist in der Bandschleifmaschine im Bereich einer Umlenkrolle eine auf die Außenseite des Schleifbandes wirkende Absaugvorrichtung vorgesehen, die den Schleifstaub von der Oberfläche der Schleifschicht wieder absaugen soll. Die Wirksamkeit einer derartigen Absaugung ist jedoch begrenzt.The grinding dust has therefore already been proposed vacuum from the sanding belt. For this is in the belt sander in the area of a pulley suction device acting on the outside of the grinding belt provided that the grinding dust from the surface vacuum the grinding layer again. The The effectiveness of such a suction is limited.
Der Erfindung liegt die Aufgabe zugrunde, die Schleifstaubentfernung bei Schleifbändern zu verbessern.The invention is based, which Improve sanding dust removal from sanding belts.
Diese Aufgabe wird bei einem Schleifband der eingangs genannten Art dadurch gelöst, daß die Schleifschicht partikeldurchströmbar ausgebildet ist, zwischen der Schleifschicht und dem Träger eine partikeldurchströmbare Zwischenschicht angeordnet ist und der Träger partikeldurchströmbar ausgebildet ist. This task is the beginning of a grinding belt mentioned type solved in that the grinding layer is designed to flow through particles, between the Abrasive layer and the carrier a particle flow Intermediate layer is arranged and the carrier can flow through particles is trained.
Man kann nun auf der Innenseite des Schleifbandes eine Absaugung vorsehen, die den Schleifstaub sozusagen durch das Schleifband hindurchsaugt. Der Schleifstaub kann damit am Ort des Entstehens entfernt werden, d.h. er verweilt nicht oder nur für eine sehr kurze Zeitdauer auf der Oberfläche der Schleifschicht. Der Partikelstrom durch das Schleifband, d.h. der in einem Luftstrom geführte Schleifstaub, durchdringt zunächst die Schleifschicht. Hierfür gibt es verschiedene Möglichkeiten, die weiter unten diskutiert werden. Unterhalb der Schleifschicht ist eine Zwischenschicht angeordnet, die ebenfalls partikeldurchströmbar ist. In dieser Zwischenschicht hat der Schleifstaub die Möglichkeit, einen Weg zu wählen, der nicht mehr senkrecht zur Schleifebene gerichtet ist. Der Schleifstaub kann sich vielmehr, falls erforderlich, auch parallel zur Schleifschicht bewegen. Dies ermöglicht ihm, an einer geeigneten Stelle den Träger zu durchdringen, der ebenfalls partikeldurchströmbar ausgebildet ist. Man ist also nicht mehr darauf angewiesen, daß im Moment des Absaugens beim Schleifen eine beispielsweise in der Schleifschicht vorgesehene Öffnung genau einer Absaugöffnung gegenüberliegt. Vielmehr ist die Zuordnung einer Absaugeinrichtung in der Bandschleifmaschine und bestimmten Oberflächenbereichen des Schleifbandes in gewissen Grenzen frei wählbar. Dies hat zur Folge, daß die Schleifstaubabsaugung auch dann funktioniert, wenn sich das Schleifband bewegt, die Schleifschicht also über die zu schleifende Oberfläche bewegt wird. Beispielsweise kann man die entsprechende Absaugvorrichtung in Laufrichtung des Schleifbandes hinter dem Schleifschuh anordnen oder den Schleifschuh mit entsprechenden Absaugöffnungen ausrüsten. Dadurch, daß das Schleifband permanent durchsaugt werden kann, ist eine ausgezeichnete Möglichkeit gegeben, den Schleifstaub abzutransportieren. Die Standzeit des Schleifbandes verlängert sich entsprechend und es gelangt weder Schleifstaub in die Umwelt noch setzt sich die Schleifschicht schnell zu.You can now do one on the inside of the sanding belt Provide suction, the grinding dust, so to speak sucked through the sanding belt. The sanding dust can be removed at the point of origin, i.e. he does not stay or only for a very short period of time on the surface of the grinding layer. The particle flow through the sanding belt, i.e. the one in an air stream guided grinding dust, first penetrates the Abrasive layer. There are various possibilities, which are discussed below. Below an intermediate layer is arranged on the grinding layer, which can also flow through particles. In this intermediate layer the sanding dust has the opportunity to Way to choose which is no longer perpendicular to the Grinding plane is directed. The sanding dust can rather, if necessary, also parallel to Move the grinding layer. This enables him to work on one suitable place to penetrate the wearer who also is designed to flow through particles. One is So no longer rely on the fact that at the moment of Suction during grinding, for example in the Opening provided exactly one suction opening opposite. Rather, the assignment is one Suction device in the belt grinder and certain surface areas of the sanding belt in certain limits freely selectable. This has the consequence that the dust extraction works even if the sanding belt moves, i.e. the sanding layer is moved over the surface to be ground. For example you can use the appropriate suction device in the running direction of the sanding belt behind the Arrange the sanding pad or use the appropriate sanding pad Equip extraction openings. Because that Sanding belt can be sucked through permanently is one excellent opportunity given the grinding dust evacuate. The service life of the sanding belt lengthens accordingly and it neither arrives Grinding dust in the environment still settles the grinding layer quickly to.
Hierbei ist bevorzugt, daß der Träger aus einem Partikelstrom undurchlässigen Material gebildet ist und eine Vielzahl von Löchern aufweist, die im wesentlichen gleichmäßig über seine Fläche verteilt sind. Dadurch, daß man ein Partikelstrom undurchlässiges Material für den Träger verwenden kann, wird die Auswahl der Materialien für den Träger nicht eingeschränkt. Man kann die gleichen Trägermaterialien verwenden, wie bei herkömmlichen Schleifbändern auch. Das Material kann insbesondere im Hinblick auf die Festigkeit ausgewählt werden, die der Träger aufweisen muß. Das Trägermaterial sollte insbesondere reißfest sein. Insgesamt reicht es aber aus, wenn die Kombination aus Schleifschicht, Zwischenschicht und Träger ausreichend zugfest ist. Gegebenenfalls kann der Träger auch durch einen Teil der Zwischenschicht gebildet sein. Der Partikelstrom durch den Träger hindurch wird dadurch gewährleistet, daß der Träger eine Vielzahl von Löchern aufweist die gleichmäßig über seine Fläche verteilt sind. Diese Löcher können beispielsweise durch eine Perforation erzeugt worden sein. Die Tatsache, daß die Löcher gleichmäßig über die Fläche verteilt sind, bedeutet nicht, daß hier unbedingt ein regelmäßiges Muster vorliegen muß. Erforderlich ist lediglich, daß das Verhältnis von Öffnungsfläche zu verbleibender Trägerfläche über die gesamte Fläche des Trägers im wesentlichen konstant ist, wenn man Flächenabschnitte von wenigen Quadratzentimetern Größe, beispielsweise 10 cm2 oder weniger, betrachtet. It is preferred here that the carrier is formed from a particle-impermeable material and has a large number of holes which are distributed substantially uniformly over its surface. The fact that a particle flow impermeable material can be used for the carrier does not limit the choice of materials for the carrier. The same backing materials can be used as with conventional sanding belts. The material can be selected in particular with regard to the strength that the carrier must have. The carrier material should in particular be tear-resistant. Overall, however, it is sufficient if the combination of the grinding layer, intermediate layer and carrier is sufficiently tensile. If necessary, the carrier can also be formed by part of the intermediate layer. The particle flow through the carrier is ensured in that the carrier has a plurality of holes which are evenly distributed over its surface. These holes may have been created by perforation, for example. The fact that the holes are evenly distributed over the surface does not mean that a regular pattern is essential. It is only necessary that the ratio of the opening area to the remaining carrier area is essentially constant over the entire area of the carrier, if one considers area sections of a few square centimeters in size, for example 10 cm 2 or less.
Vorzugsweise weisen die Löcher einen maximalen Abstand zueinander auf, der in Abhängigkeit von der Zwischenschicht so gewählt ist, daß ein nahezu stauloser Partikelstrom von der Schleifschicht durch die Zwischenschicht durch die Löcher erzeugbar ist. Dementsprechend können die Löcher einen um so größeren Abstand zueinander aufweisen, je leichter die Staubpartikel parallel zum Träger durch die Zwischenschicht strömen können.The holes are preferably at a maximum distance to each other depending on the intermediate layer is selected so that an almost dust-free particle stream from the grinding layer through the intermediate layer can be generated through the holes. Accordingly the holes can be all the more apart the lighter the dust particles in parallel can flow to the carrier through the intermediate layer.
Vorzugsweise ist die Zwischenschicht als offenporiger Schaum ausgebildet. Ein derartiger Schaum kann beispielsweise durch eine Schaumstoffschicht realisiert sein. Die Schaumstoffschicht erlaubt den Staubpartikeln eine Bewegung grundsätzlich in alle Richtungen. Der Staub kann also in der Schaumstoffschicht von der Schleifschicht zu den einzelnen Löchern im Träger fließen.The intermediate layer is preferably open-pored Foam trained. Such a foam can, for example realized by a layer of foam his. The foam layer allows the dust particles basically a movement in all directions. The Dust can therefore be in the foam layer from the Flow the grinding layer to the individual holes in the carrier.
Vorzugsweise ist die Zwischenschicht elastisch ausgebildet. Neben der Funktion, einen Strömungspfad für den Partikelstrom zur Verfügung zu stellen, übernimmt die Zwischenschicht auch die Funktion, das Schleifband in gewissem Umfang nachgiebig zu gestalten, so daß man glattere Oberflächen erzielen kann.The intermediate layer is preferably elastic. In addition to the function, a flow path for the The particle flow is provided by Intermediate layer also function, the sanding belt in to be flexible to a certain extent, so that one can achieve smoother surfaces.
Vorzugsweise ist der Träger aus Papier, Gewebe oder Film gebildet. Diese Materialien haben sich bewährt. Sie können hohe Zugkräfte übertragen und sind relativ preisgünstig. Als Film wird vorzugsweise ein Kunststoffilm verwendet. Man kann aber auch ein Vlies oder ein anderes, weniger zugfestes Material verwenden, wenn das Schleifband ansonsten insgesamt zugfest ist oder auf andere Weise arbeiten kann. The carrier is preferably made of paper, fabric or Film formed. These materials have proven their worth. They can transmit high tensile forces and are relative inexpensive. A plastic film is preferably used as the film used. But you can also use a fleece or a use a different, less tensile material if that Otherwise the sanding belt is overall tensile or on other way can work.
Bevorzugterweise weist die Schleifschicht einen Schleifmittelträger aus einem Partikelstrom undurchlässigen Material auf, der eine flächige Anordnung einer Vielzahl von Perforationsöffnungen aufweist. Hier gilt im Grunde eine ähnliche Betrachtungsweise wie für den Träger. Die Perforationsöffnungen sind so angeordnet, daß der beim Schleifen entstehende Staub keine größeren Strecken auf der Oberfläche der Schleifschicht zurücklegen muß, sondern relativ rasch in die nächste Perforationsöffnung hineingesaugt werden kann. Die Perforationsöffnungen müssen nicht in einem vorbestimmten Muster angeordnet sein, obwohl dies die Fertigung erleichtert. Die Verwendung eines Partikelstrom undurchlässigen Materials hat den Vorteil, daß man auch für den Schleifmittelträger auf Materialien zurückgreifen kann, die sich in der Praxis bewährt haben. Die Partikelstromdurchlässigkeit wird durch die Perforationsöffnungen erreicht.The abrasive layer preferably has one Abrasive backing made from a particle stream impermeable Material on a flat arrangement of a Has a large number of perforation openings. Applies here basically a view similar to that for the Carrier. The perforation openings are arranged so that the dust created during grinding is no larger Cover stretches on the surface of the abrasive layer must, but relatively quickly into the next perforation can be sucked in. The perforation openings don't have to be in a predetermined pattern be arranged, although this facilitates manufacturing. The use of an impermeable particle stream Materials has the advantage that you can also use it for use the abrasive backing on materials can, which have proven themselves in practice. The particle flow permeability is through the perforation openings reached.
Vorzugsweise weisen die Perforationsöffnungen einen Durchmesser im Bereich von 0,5 bis 5 mm und benachbarte Perforationsöffnungen einen maximalen Abstand zueinander von 20 mm auf, wobei der maximale Abstand des Randes zur nächsten Perforationsöffnung 15 mm beträgt. Üblicherweise liegen die Abstände zwischen benachbarten Perforationsöffnungen und der Abstand des Randes an jeder Stelle zur nächsten Perforationsöffnung sogar bei noch kleineren Werten, beispielsweise in den Größenordnung von 10 mm. Damit werden relativ kurze Strecken bereit gestellt, die der Schleifstaub auf der Oberfläche des Schleifbandes zurücklegen muß, bevor er in die nächste Perforationsöffnung hineingesaugt werden kann.The perforation openings preferably have one Diameters in the range of 0.5 to 5 mm and neighboring Perforation openings a maximum distance from each other from 20 mm, with the maximum distance of the edge to the next perforation opening is 15 mm. Usually are the distances between neighboring ones Perforation openings and the distance of the edge on each Even add to the next perforation even smaller values, for example in the order of magnitude of 10 mm. This means that relatively short distances are prepared put the sanding dust on the surface of the sanding belt must be put back in before next perforation opening can be sucked in.
Bevorzugterweise ist der Schleifmittelträger aus Papier, Gewebe oder Film gebildet. Als Film kann insbesondere ein Kunststoffilm verwendet werden. Auf diesen Materialien lassen sich Schleifmittel, beispielsweise das Schleifkorn, gut befestigen.The abrasive backing is preferably made of paper, Tissue or film formed. As a film in particular a plastic film can be used. On this Materials can be abrasives, for example fasten the abrasive grain.
In einer alternativen Ausgestaltung ist vorgesehen, daß die Schleifschicht als Schleifgitter ausgebildet ist. Mit einem derartigen Schleifgitter lassen sich besonders feine Schliffe erzeugen. Bei einem Schleifgitter kann der Partikelstrom durch die Öffnungen treten, die durch die einzelnen Maschen des Gitters gebildet sind.In an alternative embodiment it is provided that the grinding layer is designed as a grinding grid. With such an abrasive grille can be particularly create fine cuts. With a sanding grille the particle stream can pass through the openings that are formed by the individual meshes of the grid.
Die Erfindung wird im folgenden anhand eines bevorzugten Ausführungsbeispiels in Verbindung mit der Zeichnung näher beschrieben. Hierin zeigen:
- Fig. 1
- eine schematische Seitenansicht einer Bandschleifmaschine,
- Fig. 2
- einen Querschnitt durch ein Schleifband einer ersten Ausführungsform,
- Fig. 3
- einen Querschnitt durch ein Schleifband einer zweiten Ausführungsform,
- Fig. 4
- eine Draufsicht auf die Schleifschicht des Schleifbandes nach Fig. 2 und
- Fig. 5
- eine Draufsicht auf den Träger der Schleifbänder.
- Fig. 1
- a schematic side view of a belt grinding machine,
- Fig. 2
- 3 shows a cross section through an abrasive belt of a first embodiment,
- Fig. 3
- 3 shows a cross section through an abrasive belt of a second embodiment,
- Fig. 4
- a plan view of the grinding layer of the grinding belt of FIG. 2 and
- Fig. 5
- a plan view of the carrier of the grinding belts.
Fig. 1 zeigt schematisch eine Bandschleifmaschine 1,
bei der ein Schleifband 10 um zwei Umlenkrollen 2, 3
gelegt und gespannt ist, von denen die Umlenkrolle 3
einen Antrieb 4 aufweist. Die zum Spannen des Schleifbandes
10 erforderlichen Mittel sind nicht näher dargestellt.
Das Schleifband 10 wird durch die Umlenkrolle 3
in Richtung eines Pfeiles 5 angetrieben. Ein Andruckschuh
6 ist auf der Innenseite des Schleifbandes 10,
genauer gesagt dessen freien Trums angeordnet. Mit Hilfe
des Andruckschuhs 6 kann das untere Trum des
Schleifbandes 10 gegen eine Oberfläche gedrückt werden,
um diese zu schleifen. In Laufrichtung 5 hinter dem Andruckschuh
6 ist eine Absaugeinrichtung 7 vorgesehen,
die durch eine schematisch dargestellten Ventilator 8
symbolisiert sein soll.1 schematically shows a belt grinding machine 1,
in which an
Fig. 2 zeigt eine erste Ausgestaltung des Schleifbandes
10 im Querschnitt. Das Schleifband 10 weist eine
Schleifschicht 11 auf, die gebildet ist durch einen
Schleifmittelträger 12, beispielsweise aus Papier, Gewebe
oder einem Kunststoffilm, an dem ein Schleifkorn
13 oder ein anderes Schleifmittel befestigt ist, beispielsweise
durch Kleben oder Einbetten in eine Kunststoffmatrix.Fig. 2 shows a first embodiment of the grinding
Der Schleifmittelträger 12 besteht aus einem Material,
das an und für sich Partikelstrom undurchlässig ist,
d.h. das Material selbst ist so dicht, daß keine Staubteilchen
hindurchtreten können. Allerdings ist der
Schleifmittelträger 12 mit einer Vielzahl von Perforationsöffnungen
14 versehen, die groß genug sind, um den
Durchtritt von Staub zu ermöglichen. Die Anordnung dieser
Perforationsöffnungen ist aus Fig. 4 zu erkennen.
Die Perforationsöffnungen 14 haben einen Durchmesser im
Bereich von 0,5 bis 5 mm. In der Regel liegt dieser
Durchmesser bei etwa 1 mm. Anstelle einer Kreisform
können die Perforationsöffnungen 14 im Grunde jede beliebige
Form aufweisen, solange gewährleistet ist, daß
beim Schleifen entstehender Staub durch die Perforationsöffnungen
14 hindurchtreten kann. Selbstverständlich
durchdringen die Perforationsöffnungen 14 die Schleifschicht
vollständig, d.h. auch das Schleifkorn. Die maximale
Entfernung zwischen zwei benachbarten Perforationsöffnungen
14 liegt bei 20 mm. Vorzugsweise wählt man
einen Abstand von nur 7 bis 10 mm. Auch der maximale
Abstand des Randes 15 (parallel zur Bewegungsrichtung
5) zur nächsten Perforationsöffnungen 14 liegt bei
20 mm. Es ist also gewährleistet, daß der beim Schleifen
entstehende Schleifstaub maximal diese Strecken zurücklegen
muß, bevor er in die nächstgelegene Perforationsöffnung
14 hineingesaugt werden kann.The
Auf der dem Schleifkorn 13 abgewandten Seite des
Schleifmittelträgers 12 ist eine Zwischenschicht 16 angeordnet,
die aus Schaumstoff gebildet ist. Der Schaumstoff
16 ist hierbei offenporig, d.h. er ist ebenfalls
partikelstromdurchlässig. Der Partikelstrom ist hierbei
allerdings nicht auf eine Richtung senkrecht zur Erstreckung
des Schleifmittelträgers 12 beschränkt, sondern
der Partikelstrom kann sich in der Zwischenschicht
16 im Grunde in jede Richtung bewegen. Die Hauptrichtung
des Partikelstroms wird dabei zwar von der
Schleifschicht 11 zu einem Träger 17 verlaufen, der auf
den Umlenkrollen 2, 3 aufliegt. Im Rahmen dieser Bewegung
werden sich aber durchaus Strömungspfade ausbilden,
die eine Komponente parallel zur Erstreckung des
Schleifmittelträgers 12 aufweisen.On the side facing away from the
Der Träger 17 ist hier zugfest, d.h. er wird nicht nennenswert
gedehnt, wenn er durch die Rollen 2, 3 angetrieben
wird. Im Grunde reicht es aber aus, wenn diese
Zugfestigkeit beim Schleifband 10 insgesamt gegeben
ist. Wenn die Zwischenschicht 16 stabil genug ist, kann
sie auch die Funktion des Trägers 17 mit übernehmen,
d.h. der Träger 17 ist dann als Teil der Zwischenschicht
16 ausgebildet.The
Der Träger 17 ist ebenfalls aus einem Material gebildet,
das an sich Partikelstrom undurchlässig ist. In
ähnlicher Weise wie die Schleifschicht 11 ist auch der
Träger 17 perforiert. Dies ist beispielsweise aus Fig.
5 erkennbar, die eine Draufsicht auf den Träger 17 mit
Löchern 18 zeigt. Ein Vergleich der Fig. 4 und 5 macht
deutlich, daß die Anordnung der Perforationsöffnungen
14 und der Löcher 18 nicht übereinstimmen muß, d.h. es
muß nicht jeder Perforationsöffnung 14 ein Loch 18 gegenüberliegen,
obwohl dies natürlich möglich ist. Der
Partikelstrom, der durch die Perforationsöffnungen 14
hindurchtritt, sucht sich vielmehr seinen Weg durch die
Zwischenschicht 16, bis er durch die Löcher 18 des Trägers
17 treten kann. Auch die Löcher 18 des Trägers 17
haben einen Durchmesser im Bereich von 0,5 bis 3 mm,
vorzugsweise 1 mm, und einen maximalen Abstand zueinander
von 20 mm, vorzugsweise 7 bis 10 mm. Auch der Abstand
der Löcher 18 zum Rand 19 beträgt maximal 20 mm.
Dieser Abstand kann im allgemeinen größer gewählt werden
als der Abstand der Perforationsöffnungen 14 zum
Rand 15 der Schleifschicht 11.The
Fig. 3 zeigt eine abgewandelte Ausführungsform eines
Schleifbandes 10', bei dem die Schleifschicht 11' anders
ausgebildet ist. Die Schleifschicht 11' wird nunmehr
durch ein Schleifgitter 20 gebildet, d.h. ein
netz- oder gitterartiges Flächengebilde, an dessen Stegen
das Schleifkorn 13 befestigt ist. Der Partikelstrom
kann durch die Maschen des Schleifgitters 20 hindurchtreten
und durch die Zwischenschicht 16 zu den Löchern
18 im Träger 17 gelangen. Fig. 3 shows a modified embodiment of a
Abrasive belt 10 ', in which the abrasive layer 11' is different
is trained. The abrasive layer 11 'is now
formed by a grinding grid 20, i.e. on
net-like or lattice-like fabrics, on the webs
the
Wenn nun das Schleifband 10 im Betrieb auf eine zu
schleifende Fläche aufgesetzt und in Bewegung gesetzt
wird, entsteht hauptsächlich im Bereich des Andruckschuhs
6 Abrieb in Form von Schleifstaub. Gleichzeitig
erzeugt die Absaugeinrichtung 7 einen Luftstrom durch
das Schleifband 10 hindurch, der dafür sorgt, daß der
mit dem Schleifband 10 in Richtung auf die Absaugeinrichtung
7 transportierte Schleifstaub unmittelbar
durch das Schleifband 10, 10' hindurch abgesaugt werden
kann. Hierbei dient die Zwischenschicht 16 als Verteiler,
d.h. sie sorgt dafür, daß der durch die Perforationsöffnungen
14 oder das Schleifgitter 20 hindurchtretende
Schleifstaub zu solchen Löchern 18 im Träger 17
gelangen kann, die unter Unterdruck stehen.If now the sanding
Der Schleifstaub wird also permanent und zuverlässig
entfernt, so daß sich die Schleifschicht 11, 11' nicht
zusetzt und das Schleifband 10, 10' somit eine längere
Standzeit aufweist.The sanding dust becomes permanent and reliable
removed so that the
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/838,770 US6575821B2 (en) | 2000-08-01 | 2001-04-19 | Abrasive belt for a belt grinding machine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20013377U DE20013377U1 (en) | 2000-08-01 | 2000-08-01 | Sanding belt for a belt sanding machine |
| DE20013377U | 2000-08-01 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1177861A2 true EP1177861A2 (en) | 2002-02-06 |
| EP1177861A3 EP1177861A3 (en) | 2002-10-23 |
| EP1177861B1 EP1177861B1 (en) | 2004-08-18 |
Family
ID=7944742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01103306A Expired - Lifetime EP1177861B1 (en) | 2000-08-01 | 2001-02-13 | Sanding belt for belt sanding machine |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1177861B1 (en) |
| AT (1) | ATE273770T1 (en) |
| DE (2) | DE20013377U1 (en) |
| ES (1) | ES2222278T3 (en) |
| PT (1) | PT1177861E (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004007747B3 (en) * | 2004-02-18 | 2004-12-23 | Jöst, Peter | Grinding machine belt carrier has support layer with inside and outside, several spaced part support components being positioned on outside |
| WO2019111212A1 (en) * | 2017-12-08 | 2019-06-13 | 3M Innovative Properties Company | Porous abrasive article |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2460624A1 (en) * | 2010-12-06 | 2012-06-06 | Jöst GmbH | Grinding device for mechanical grinding of rotor blades for wind power systems |
| CN106425771B (en) * | 2016-12-02 | 2018-08-24 | 肖传金 | Sand machine in the semi-automatic special-shaped abrasive band of one kind |
| DE102017126627A1 (en) * | 2017-11-13 | 2019-05-16 | Cordier Spezialpapier Gmbh | abrasive |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2804733A (en) * | 1953-05-21 | 1957-09-03 | Rexall Drug Company | Abrasive article |
| JPS63174878A (en) * | 1987-01-08 | 1988-07-19 | Kuraray Co Ltd | Polishing material for precision polishing |
| JPH06150306A (en) * | 1992-10-30 | 1994-05-31 | Sony Corp | Device for treating surface of magnetic recording medium |
| EP0716903A1 (en) * | 1994-12-07 | 1996-06-19 | Peter Jöst | Abrasive article on backing |
| WO1999006182A1 (en) * | 1997-07-30 | 1999-02-11 | Scapa Group Plc | Polishing semiconductor wafers |
| US5910471A (en) * | 1997-03-07 | 1999-06-08 | Minnesota Mining And Manufacturing Company | Abrasive article for providing a clear surface finish on glass |
-
2000
- 2000-08-01 DE DE20013377U patent/DE20013377U1/en not_active Expired - Lifetime
-
2001
- 2001-02-13 AT AT01103306T patent/ATE273770T1/en active
- 2001-02-13 EP EP01103306A patent/EP1177861B1/en not_active Expired - Lifetime
- 2001-02-13 ES ES01103306T patent/ES2222278T3/en not_active Expired - Lifetime
- 2001-02-13 PT PT01103306T patent/PT1177861E/en unknown
- 2001-02-13 DE DE50103294T patent/DE50103294D1/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2804733A (en) * | 1953-05-21 | 1957-09-03 | Rexall Drug Company | Abrasive article |
| JPS63174878A (en) * | 1987-01-08 | 1988-07-19 | Kuraray Co Ltd | Polishing material for precision polishing |
| JPH06150306A (en) * | 1992-10-30 | 1994-05-31 | Sony Corp | Device for treating surface of magnetic recording medium |
| EP0716903A1 (en) * | 1994-12-07 | 1996-06-19 | Peter Jöst | Abrasive article on backing |
| US5910471A (en) * | 1997-03-07 | 1999-06-08 | Minnesota Mining And Manufacturing Company | Abrasive article for providing a clear surface finish on glass |
| WO1999006182A1 (en) * | 1997-07-30 | 1999-02-11 | Scapa Group Plc | Polishing semiconductor wafers |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 012, no. 442 (M-766), 21. November 1988 (1988-11-21) & JP 63 174878 A (KURARAY CO LTD), 19. Juli 1988 (1988-07-19) * |
| PATENT ABSTRACTS OF JAPAN vol. 018, no. 466 (P-1794), 30. August 1994 (1994-08-30) & JP 06 150306 A (SONY CORP), 31. Mai 1994 (1994-05-31) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004007747B3 (en) * | 2004-02-18 | 2004-12-23 | Jöst, Peter | Grinding machine belt carrier has support layer with inside and outside, several spaced part support components being positioned on outside |
| WO2019111212A1 (en) * | 2017-12-08 | 2019-06-13 | 3M Innovative Properties Company | Porous abrasive article |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1177861A3 (en) | 2002-10-23 |
| ES2222278T3 (en) | 2005-02-01 |
| DE20013377U1 (en) | 2000-10-05 |
| DE50103294D1 (en) | 2004-09-23 |
| ATE273770T1 (en) | 2004-09-15 |
| PT1177861E (en) | 2004-11-30 |
| EP1177861B1 (en) | 2004-08-18 |
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