EP2576137B1 - Abrasive lining holder with recesses - Google Patents

Abrasive lining holder with recesses Download PDF

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Publication number
EP2576137B1
EP2576137B1 EP11721290.2A EP11721290A EP2576137B1 EP 2576137 B1 EP2576137 B1 EP 2576137B1 EP 11721290 A EP11721290 A EP 11721290A EP 2576137 B1 EP2576137 B1 EP 2576137B1
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EP
European Patent Office
Prior art keywords
lining
carrier
sanding
lining carrier
shoe
Prior art date
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EP11721290.2A
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German (de)
French (fr)
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EP2576137A1 (en
Inventor
Sepp Breitenmoser
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Sia Abrasives Industries AG
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Sia Abrasives Industries AG
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Priority to EP11721290.2A priority Critical patent/EP2576137B1/en
Publication of EP2576137A1 publication Critical patent/EP2576137A1/en
Application granted granted Critical
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Classifications

    • 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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
    • B24B21/06—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving members with limited contact area pressing the belt against the work, e.g. shoes sweeping across the whole area to be ground
    • B24B21/08—Pressure shoes; Pressure members, e.g. backing belts

Definitions

  • the present invention relates to a lining carrier for a sanding shoe lining, in particular for use with a sanding shoe for pressing grinding surfaces on workpieces in segment and wide-belt sanding machines.
  • the lining carrier has an abrasive coating which has at least one flat, padded and / or lubricious contact surface.
  • the invention relates to a Schleifschuhbelag and a sanding pad (see, eg DE-C-951766 ).
  • a wide abrasive belt is driven by rollers and pressed against the surface of the workpiece by means of a sanding shoe.
  • a sanding shoe has to meet several requirements.
  • the friction between the sanding belt and the sanding pad must be as low as possible. Therefore, the sanding pad has a sanding pad which in operation is pressed against the sanding belt and therefore has a lubricious surface.
  • the heat generated by the Anpressreibung should not affect the Schleifschuhbelag, therefore, a heat-resistant material is usually used.
  • the friction created during the grinding process leads to heat generation and wear of the sanding pad cover. Due to the heat development of the lining carrier is also affected. For example, it may lead to deformation of the lining carrier, which require a replacement of the lining carrier. In addition, the replacement is made even more difficult by deformations.
  • EP 1 716 972 A1 describes a replaceable pad shoe covering comprising a pad carrier of non-metallic material.
  • a non-metallic material By using a non-metallic material, a reduced heat conduction takes place. As a result, the frictional heat generated during the grinding process is not absorbed to a significant degree by the lining carrier, and as a result, it is less affected. Nevertheless, it can come to heat transfer to the lining carrier by the compact design.
  • the lining carrier is usually of elongated shape with a longitudinal axis, which in the mounted state transversely or substantially perpendicular to the grinding direction.
  • the lining carrier can be pushed into a recess of a carrier device, and has stop surfaces for absorbing transverse forces.
  • the lining carrier has a surface facing the carrier device in the assembled state, and a surface facing the coating or abrasive material in the mounted state.
  • the object of the present invention is to avoid the disadvantages of the known.
  • a lining carrier for a sanding pad is to be created, which is inexpensive to manufacture.
  • the handling and the duration of the lining carrier should be improved.
  • a lining carrier for a sanding shoe lining in particular for use with a sanding shoe for pressing grinding surfaces on workpieces in segment and wide-belt sanding machines can be provided which has at least one recess.
  • the recess is preferably located on the covering and / or the carrier device facing surface of the lining carrier, and is designed so that the heat exchange via an air cushion hiss the lining carrier and a subsequent to the lining carrier component or a material applied to the lining carrier can be carried out ,
  • Such recesses may be in the form of holes within or through the entire lining carrier, or by depressions on the surface of the lining carrier, preferably grooves.
  • the recess may be stamped, milled or drilled in the lining carrier, or the lining carrier may be pressed or cast into a mold having struts and recesses.
  • the contact surface is essentially retained.
  • material can be applied to a base body, for example, glued as a strip, wherein the recess is formed by the space between the applied materials.
  • the recess is formed by two webs which enclose the recess. Said webs together form a recess, in particular a groove, which preferably extends along the longitudinal axis of the lining carrier.
  • the groove may be mounted on one side or on the other side, so that a cavity is formed between the lining carrier and a lining mounted on the lining carrier or between the lining carrier and a carrier device, in particular a grinding shoe.
  • the lining carrier on at least two webs on the carrier device, z.Bsp the Schleifschuhbelagani, facing side. This results in a groove between the lining carrier and the carrier device.
  • the lining carrier has at least three, preferably four webs on the side facing the carrier device. In this way, two to three grooves are formed between the carrier device and said lining carrier.
  • the lining carrier has at least two webs on the side facing the lining.
  • the lining carrier has at least three webs. This results in at least one, preferably two Grooves between the lining carrier and the lining fixed on the lining carrier.
  • the at least one groove extends continuously over the entire longitudinal axis of the lining carrier.
  • the lining carrier may also include metal fasteners, for example eyelets, which are easily removed from the sanding pad for disposal.
  • the lining carrier according to the invention serves as a support element for an abrasive coating comprising a padding and / or a sliding surface.
  • the cushioning material and / or the sliding surface may be glued to the lining carrier, welded, fixed with fastening elements or applied as an adhesive covering.
  • a lining carrier with a corresponding abrasive coating forms a Schleifschuhbelag.
  • the lining carrier establishes a connection of the abrasive coating to a carrier device.
  • a carrier device is in particular a grinding shoe, comprising a sanding shoe lining, further comprising a lining carrier and an abrasive coating.
  • the sanding pad can be glued to the support device / sanding shoe, clamped, fixed with or without additional fasteners or applied as an adhesive coating.
  • the sanding pad is slidable and fastened in a recess of a sanding shoe.
  • the lining carrier with velvet coating on at least one stop surface for receiving transverse forces This abutment surface encloses an angle parallel to the contact surface with a plane.
  • the angle between abutment surface and contact surface is an obtuse angle, i. less than 180 ° and greater than 90 °, preferably it is about 115 ° to 130 °.
  • the lining carrier has a dovetail-shaped broadening in the transverse axis on the side facing away from the lining or the side facing the carrier device in the transverse axis. This broadening facilitates the loading of the support device, in particular of the sanding pad with the lining carrier.
  • the lining carrier has a dovetail-shaped broadening as described above and, moreover, the bearing surface rises at an angle of between 4 ° and 9 ° as far as the flat pressing or contact surface. This then forms an inlet and outlet slope.
  • the dovetail widening may be completely absent and the lining carrier has only one inlet and outlet bevel.
  • a lining carrier according to the invention consists of a non-metallic material. This enhances the positive effects on heat conduction. These starting materials are inexpensive and easier to dispose of.
  • the lining carrier essentially consists of a cellulose material, in particular a wood and / or cotton material and / or a polymer material.
  • the material is an MDF, an HDF, or a fibrous material, i.e., pulped cotton.
  • the selection shows the great variability of the materials in terms of their strength or elasticity.
  • the materials can be present in combination or alone.
  • the lining carrier is provided with a lining made of a sliding material, preferably graphite or a graphite compound.
  • the sanding pad is provided with a cushioning material.
  • the cushioning material may be interspersed or provided with the sliding material, preferably graphite or a graphite compound, at least over part of its thickness.
  • the cushioning material may have an open-pore structure with a large surface area.
  • the cushioning material is preferably a foam, in particular a PU foam, and / or a felt.
  • the lining carrier has a length of between 1,000 and 5,000 mm, in particular between 1,200 and 2,000 and 4,000 mm, particularly preferably between 1,400 and 4'000mm up.
  • the lining carrier also has a width between 200 and 60 mm, preferably between 150 and 70 mm, particularly preferably between 115 and 80 mm, measured at the widest point.
  • the lining carrier is tapered to the side facing the lining dovetail-shaped. This results in a lateral profile view of a widest point according to the dimensions given above, and a narrow point on which the pad is attached.
  • This narrow point of the lining carrier has in profile a width of between 150 and 20 mm, preferably between 100 and 30 mm, particularly preferably between 90 and 40 mm.
  • the thickness of the lining carrier is in profile between 2 and 10mm, preferably between 3 and 8mm, preferably between 4 and 5mm.
  • the sanding pad consists essentially of a lining carrier made of cellulose material and an abrasive coating of a cushion layer and a sliding layer.
  • the lining carrier is designed so that it fits positively into or can be attached to a sanding shoe.
  • the lining carrier has a stop surface, in particular a dovetail-shaped taper, which is designed to be complementary on the carrier device.
  • the sanding shoe lining can be fastened or covered in the support device.
  • the grinding shoe lining can be fitted in a form-fitting manner into the carrier device, except for at least one recess.
  • Webs are preferably formed on the surface of the Schleifschuhbelags, whereby at least one groove is formed.
  • the groove may extend continuously in the longitudinal axis over the entire length of the sanding shoe lining.
  • At least one groove is also inserted in the lining carrier between the lining carrier and the abrasive coating.
  • the sanding pad comprises a support device and a sanding pad.
  • the carrier device is designed such that it can absorb the sanding shoe lining substantially accurately. There is at least one recess between the sanding shoe lining and the carrier device.
  • the recess may be provided in the Scheifschuh and / or in the carrier device.
  • the sanding pad comprises at least one recess, in particular formed by webs and / or grooves on or on the side facing the carrier device side of the Schleifschuhbelages (8) and / or by webs on or on the support device.
  • the carrier device has at least one recess, in particular formed by webs and / or grooves (10).
  • the webs may be glued or welded strips, or by milled or ground profiles or grooves arise.
  • they are made of the same material as the carrier device.
  • the lining carrier 1 has a substantially dovetail-shaped shape, which tapers against the side 2 facing the lining (not shown).
  • the entire lining carrier is essentially mirror-symmetrical in relation to a vertical axis of symmetry.
  • the webs 4a and 4c are opposite to an imaginary axis of symmetry and are the same size.
  • the web 4b separates the lining facing side of the lining carrier with two grooves 5a and 5b.
  • the grooves 5a and 5b are continuous in the entire longitudinal axis of the lining carrier. 1
  • FIG. 2 shows a schematic profile view of a second embodiment of a Schleifschuhbelag 8. Also schematically a fixed on the lining carrier 1 pad 9 is shown.
  • the pad 9 is made of felt or foam, which is preferably interspersed in its thickness with a sliding material with graphite or a graphite compound.
  • FIG. 3 shows a schematic profile view of an embodiment of an inventive abrasive shoe 11.
  • the lining carrier 1 forms with a carrier device 10, the grinding shoe 11.
  • the dovetail-shaped configuration of the lining carrier profile allows insertion into a guide rail. This facilitates the stringing of the sanding pad 11.
  • On the pad carrier also a pad 9 is attached.
  • the pad 9 is made of a padding material made of felt or foam.
  • the felt or foam pad 9 has a thickness of 3 to 4mm, preferably from 3 to 3.5mm.
  • the felt preferably has a volume weight of about 0.2 to 0.7 g / cm 3 .
  • Suitable felts and foams for the embodiment according to the invention are available, for example, under the name wool felt from VFG, in DE-Gingen.
  • hotmelt or PU adhesive can be used.
  • the support device 10 is made of aluminum.
  • FIG. 4 shows a schematic sectional view in the profile of a belt grinding machine 20 with a sanding pad 11.
  • a workpiece 12 is conveyed on a grinding table 13 under a revolving belt 14.
  • the grinding belt 14 is driven by three drive rollers 15 in a running direction 16 and pressed by the grinding shoe 11 against the workpiece 12.
  • FIG. 5 shows an intermediate step in a manufacturing process of a lining carrier 1 according to the invention.
  • the blank 21 is divided into two lining carriers 1 in a sectional plane 30.
  • the resulting lining carriers 1 have five webs on the side A facing the carrier device. This results in four grooves. If necessary, the side B of the lining carrier 1 facing the lining can still be ground smooth before a coating is applied.
  • FIG. 6 is a further particular embodiment of the inventive pad carrier 1 is shown.
  • the lining carrier has a width of 82.3 mm in the profile view. The thickness is 4.7mm.
  • the lining carrier 1 is constructed symmetrically.
  • the bridges 6b, 6c and 6d are 7.6mm-8.0mm wide and are 12.4mm-12.8mm apart. This results in two central grooves 7b and 7c, which are each 12.6mm wide.
  • the lining carrier is further tapered dovetailed with respect to the side facing the lining.
  • Two further webs 6a and 6e are located at the outgoing ends of the dovetail-shaped boundary on the sides of the lining carrier 1. This results in two further grooves 7a and 7d, each 16.15mm wide.
  • the lining carrier 1 has a length of 685mm.
  • Figure 7a shows a particular embodiment of the inventive pad carrier 1.
  • the pad carrier 1 has the previously described substantially dovetail shape at the lateral ends 6a, 6f with an inclination angle of 30 ° with respect to the solder of the contact surface.
  • On the upper side (facing the lining) are three webs 4a, 4b and 4c, whereby two grooves 5a and 5b are formed.
  • On the underside (facing the carrier device) there are six webs 6a, 6b, 6c, 6d, 6e and 6f, which in turn leads to five grooves 7a, 7b, 7c, 7d and 7e.
  • the dovetail merges at the lateral ends 6a and 6f in an inlet and outlet slope, which simultaneously forms the webs 4a and 4c.
  • the grooves 7a and 7e formed by the webs of the dovetail 6a and 6f and the webs 6b and 6d are arranged parallel to the inlet and outlet slopes 4a and 4b.
  • the lining carrier 1 has a profile width between 80 - 85 mm, and in particular between 82.2 - 82.4 mm.
  • the web 4b is 54mm wide, the webs 4a and 4c each 11.15mm.
  • the lining carrier 1 is at the thickest point 4.6 mm - 4.8 mm thick, at the thinnest points 2 - 3 mm, in particular 2.4 - 2.6 mm.
  • the lining carrier 1 has a length of between 2000 mm and 3500 mm, in particular 3420 mm - 3440 mm.
  • the grooves 5a, 5b have a width of 2.5 mm - 3.5 mm, in particular from 2.9 mm - 3.1 mm.
  • the dovetail-shaped stop surfaces 6 close with the vertical (which is perpendicular to the contact surface, an angle ⁇ of preferably 30 °.
  • the inlet and outlet slopes 4a, 4c close with the contact surface an angle ⁇ of 4 - 4.5 °, in particular 4.32 °.
  • FIG. 7b shows a Schleifschuhbelag 8 with a lining carrier 1 as in Figure 7a will be shown.
  • a pad 9 was applied to the lining carrier.
  • the pad 9 consists of a cushion layer 40 and a sliding layer 41.
  • synthetic needle felt was used in the cushion layer 40 .
  • PU foam can be used for soft upholstery also PU foam.
  • FIG. 8a shows a further particular embodiment of the inventive pad carrier 1.
  • the pad carrier has five webs 6a, 6b, 6c, 6d and 6e on the carrier device side facing, from which four grooves 7a, 7b, 7c and 7d are formed.
  • FIG. 8b shows a further particular embodiment of a sanding pad 8 according to pad carrier 1 FIG. 8a ,
  • FIGS. 9a and 9b show with sanding pad 8 according to the invention fitted sneakers 11.
  • the sanding pads 8 are fixed with the dovetail profile sides of the support device 10.
  • FIG. 10 shows an alternative embodiment of the present invention.
  • a sanding pad 11 was equipped with a conventional sanding pad 8, which has no recesses or webs on the surface facing the support device 10.
  • the carrier device has the webs 6a, 6b, 6c and 6d. What results in the recesses 7a, 7b and 7c between the support device 10 and the sanding pad 8.
  • the recesses 7a, 7b, 7c may extend as grooves 7a, 7b, 7c over the entire length of the grinding shoe 11.
  • the webs 6a, 6b, 6c and 6d may be glued or part of the profile structure of the support device.
  • Suitable materials for the production of the lining carrier according to the invention are in particular MDF or HDF or chipboard or WPC ("wood plastic composite").
  • MDF Medium Density Fiber Plates
  • a density of 750 to 950 kg / m 3 and a UF or MUF bond are particularly suitable.
  • These panels are available in standardized DIN 622 Part 5, manufactured by manufacturers such as Kronospan, CH-Menznau or Kaindl, AT-Salzburg, under the name Standard MDF (eg Fluri).
  • MDF boards can preferably be used in a thickness of 3 to 6 mm as a backing. Particularly suitable are thicknesses of 4.4 to 5mm.
  • WPC is a composite of wood fibers and thermoplastics. Wood fibers are dried and mixed with a high-density polyethylene (HDPE) in the production of lining carriers according to the invention from WPC. Under high temperatures, the HDPE plasticizes and completely encloses the wood fibers. A WPC granulate is produced. Mixing ratios of 60:40 to 85:15 natural fiber to thermoplastics have proven particularly suitable.
  • HDPE high-density polyethylene
  • extrudate extrusion is suitable for the production of backing pad made of WPC according to the invention.
  • the granules are fed into an extruder, melted and compacted.
  • a shaping opening for the inventive profiles see, for example Fig. 1 . 6 . 7 or
  • the resulting lining carrier is cooled in a water cooling bath and cut into appropriate lengths, for example in lengths of 600mm to 5000mm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Braking Arrangements (AREA)

Description

Die vorliegende Erfindung betrifft einen Belagträger für einen Schleifschuhbelag, insbesondere zur Verwendung mit einem Schleifschuh zum Anpressen von Schleifflächen an Werkstücke in Segment- und Breitbandschleifmaschinen. Der Belagträger weist einen Schleifbelag auf, der mindestens eine ebene, gepolsterte und/oder gleitfähige Anpressfläche aufweist. Weiterhin betrifft die Erfindung einen Schleifschuhbelag und einen Schleifschuh (siehe z.B. DE-C-951766 ). Zum Schleifen von grossflächigen Werkstücken, insbesondere von Platten aus Rohwerkstoff, wie Spanplatten, MDF, HDF und OSB-Platten werden in der Industrie Bandschleifmaschinen verwendet. In diesen Bandschleifmaschinen wird ein breites Schleifband durch Walzen angetrieben und mittels eines Schleifschuhs gegen die Oberfläche des Werkstücks gedrückt.The present invention relates to a lining carrier for a sanding shoe lining, in particular for use with a sanding shoe for pressing grinding surfaces on workpieces in segment and wide-belt sanding machines. The lining carrier has an abrasive coating which has at least one flat, padded and / or lubricious contact surface. Furthermore, the invention relates to a Schleifschuhbelag and a sanding pad (see, eg DE-C-951766 ). For grinding large-area workpieces, in particular of sheets of raw material, such as chipboard, MDF, HDF and OSB boards belt sanding machines are used in the industry. In these belt sanding machines, a wide abrasive belt is driven by rollers and pressed against the surface of the workpiece by means of a sanding shoe.

Ein Schleifschuh muss mehreren Anforderungen genügen. Zum einen muss die Reibung zwischen Schleifband und Schleifschuh möglichst gering sein. Daher weist der Schleifschuh einen Schleifschuhbelag auf, der im Betrieb gegen das Schleifband gepresst wird und deshalb eine gleitfähige Oberfläche besitzt. Die durch die Anpressreibung entstehende Wärme soll den Schleifschuhbelag nicht beeinträchtigen, daher wird in der Regel ein wärmefestes Material verwendet.A sanding shoe has to meet several requirements. On the one hand, the friction between the sanding belt and the sanding pad must be as low as possible. Therefore, the sanding pad has a sanding pad which in operation is pressed against the sanding belt and therefore has a lubricious surface. The heat generated by the Anpressreibung should not affect the Schleifschuhbelag, therefore, a heat-resistant material is usually used.

Dennoch führt die beim Schleifprozess entstehende Reibung zu einer Wärmeentwicklung und einer Abnutzung des Schleifschuhbelags. Durch die Wärmeentwicklung wird zudem der Belagträger in Mitleidenschaft gezogen. So kann es beispielsweise zu Verformungen des Belagträgers kommen, welche ein Auswechseln des Belagträgers bedingen. Ausserdem wird das Austauschen selbst durch Verformungen erschwert.Nevertheless, the friction created during the grinding process leads to heat generation and wear of the sanding pad cover. Due to the heat development of the lining carrier is also affected. For example, it may lead to deformation of the lining carrier, which require a replacement of the lining carrier. In addition, the replacement is made even more difficult by deformations.

Das Auswechseln, respektive Bespannen oder Bestücken des Schleifschuhs mit einem neuen Belagträger mit frischem Belag ist ein zeitintensiver Prozess. Es besteht deshalb ein Bedarf nach einem Schleifschuhbelag mit einer verlängerten Standzeit, der zudem mit wenig Aufwand bestückt werden kann.Replacing, respectively covering or fitting the sanding pad with a new pad backing with fresh coating is a time-consuming process. There is therefore a need for a Schleifschuhbelag with a longer service life, which can also be equipped with little effort.

EP 1 716 972 A1 beschreibt einen austauschbaren Schleifschuhbelag, der einen Belagträger aus nichtmetallischen Material umfasst. Durch die Verwendung eines nichtmetallischen Materials findet eine reduzierte Wärmeleitung statt. Dadurch wird die beim Schleifprozess entstehende Reibungswärme nicht in wesentlichem Ausmass vom Belagträger aufgenommen und dieser dadurch weniger beeinträchtigt. Dennoch kann es durch die kompakte Bauweise zu einer Wärmeübertragung auf den Belagträger kommen. EP 1 716 972 A1 describes a replaceable pad shoe covering comprising a pad carrier of non-metallic material. By using a non-metallic material, a reduced heat conduction takes place. As a result, the frictional heat generated during the grinding process is not absorbed to a significant degree by the lining carrier, and as a result, it is less affected. Nevertheless, it can come to heat transfer to the lining carrier by the compact design.

Der Belagträger ist zumeist von länglicher Form mit einer Längsachse, die im montierten Zustand quer bzw. im Wesentlichen senkrecht, zur Schleifrichtung verläuft. Der Belagträger kann in eine Ausnehmung einer Trägervorrichtung geschoben werden, und besitzt Anschlagflächen zur Aufnahme von Querkräften. Des Weiteren besitzt der Belagträgers eine Oberfläche, die im montierten Zustand zur Trägervorrichtung weist, und eine Oberfläche, die im montierten Zustand zum Belag, bzw. zum Schleifgut weist.The lining carrier is usually of elongated shape with a longitudinal axis, which in the mounted state transversely or substantially perpendicular to the grinding direction. The lining carrier can be pushed into a recess of a carrier device, and has stop surfaces for absorbing transverse forces. Furthermore, the lining carrier has a surface facing the carrier device in the assembled state, and a surface facing the coating or abrasive material in the mounted state.

Aufgabe der vorliegenden Erfindung ist es, die Nachteile des Bekannten zu vermeiden. Insbesondere soll ein Belagträger für einen Schleifschuh geschaffen werden, der preiswert herzustellen ist. Insbesondere soll auch die Handhabbarkeit und die Laufzeit des Belagträgers verbessert werden.The object of the present invention is to avoid the disadvantages of the known. In particular, a lining carrier for a sanding pad is to be created, which is inexpensive to manufacture. In particular, the handling and the duration of the lining carrier should be improved.

Diese Aufgabe wurde mit einem Belagträger gemäß Anspruch 1 und einem Schleifschuh gemäß Anspruch 16 gelöst. Völlig überraschend hat sich gezeigt, dass ein Belagträger für einen Schleifschuhbelag, insbesondere zur Verwendung mit einem Schleifschuh zum Anpressen von Schleifflächen an Werkstücken in Segment- und Breitbandschleifmaschinen bereitgestellt werden kann, der mindestens eine Ausnehmung aufweist.This object has been achieved with a lining carrier according to claim 1 and a grinding shoe according to claim 16. Quite surprisingly, it has been found that a lining carrier for a sanding shoe lining, in particular for use with a sanding shoe for pressing grinding surfaces on workpieces in segment and wide-belt sanding machines can be provided which has at least one recess.

Die Ausnehmung befindet sich bevorzugt auf der dem Belag und/oder der der Trägervorrichtung zuzuwendenden Fläche des Belagträgers, und ist so ausgebildet, dass der Wärmeaustausch über ein Luftpolster zischen dem Belagträger und einem an dem Belagträger anschliessenden Bauteil oder einem auf dem Belagträger aufgebrachten Material erfolgen kann.The recess is preferably located on the covering and / or the carrier device facing surface of the lining carrier, and is designed so that the heat exchange via an air cushion hiss the lining carrier and a subsequent to the lining carrier component or a material applied to the lining carrier can be carried out ,

Solche Ausnehmungen können in der Form von Löchern innerhalb oder durch den gesamten Belagträger ausgestaltet sein, oder durch Vertiefungen auf der Oberfläche des Belagträgers, bevorzugt Nuten.Such recesses may be in the form of holes within or through the entire lining carrier, or by depressions on the surface of the lining carrier, preferably grooves.

Die Ausnehmung kann in den Belagträger gestanzt, gefräst oder gebohrt sein, oder der Belagträger kann in eine Form gepresst oder gegossen werden, welche Verstrebungen und Aussparungen aufweist. Die Anpressfläche bleibt im Wesentlichen erhalten. Alternativ kann Material auf einen Grundkörper aufgebracht werden, beispielsweise als Leiste aufgeklebt werden, wobei die Ausnehmung durch den Raum zwischen den aufgebrachten Materialien gebildet wird.The recess may be stamped, milled or drilled in the lining carrier, or the lining carrier may be pressed or cast into a mold having struts and recesses. The contact surface is essentially retained. Alternatively, material can be applied to a base body, for example, glued as a strip, wherein the recess is formed by the space between the applied materials.

Durch die mindestens eine Ausnehmung kann ein verbesserter Wärmetausch zwischen dem Belagträger und der Umgebungsluft stattfinden. Ausserdem gegenüber einer massiven Ausführung des Belagträges wird weniger Material verbraucht und überraschenderweise findet kein Verlust an Stabilität und Haltbarkeit statt.Due to the at least one recess, an improved heat exchange between the lining carrier and the ambient air can take place. In addition to a massive design of the lining carrier less material is consumed and surprisingly no loss of stability and durability takes place.

In einer bevorzugten Ausführungsform wird die Ausnehmung durch zwei Stege gebildet, welche die Ausnehmung einschliessen. Besagte Stege bilden zusammen eine Ausnehmung, insbesondere eine Nut, die bevorzugt entlang der Längsachse des Belagträgers verläuft. Die Nut kann auf der einen Seite oder anderen Seite angebracht sein, so dass ein Hohlraum zwischen dem Belagträger und einem auf dem Belagträger angebrachten Belag oder zwischen dem Belagträger und einer Trägervorrichtung, insbesondere einem Schleifschuh, gebildet wird.In a preferred embodiment, the recess is formed by two webs which enclose the recess. Said webs together form a recess, in particular a groove, which preferably extends along the longitudinal axis of the lining carrier. The groove may be mounted on one side or on the other side, so that a cavity is formed between the lining carrier and a lining mounted on the lining carrier or between the lining carrier and a carrier device, in particular a grinding shoe.

In einer bevorzugten Ausführungsform weist der Belagträger mindestens zwei Stege auf der der Trägervorrichtung, z.Bsp der Schleifschuhbelagträger, zugewandten Seite auf. Dadurch entsteht zwischen dem Belagträger und der Trägervorrichtung eine Nut.In a preferred embodiment, the lining carrier on at least two webs on the carrier device, z.Bsp the Schleifschuhbelagträger, facing side. This results in a groove between the lining carrier and the carrier device.

In einer weiteren besonderen Ausführungsform weist der Belagträger mindestens drei, vorzugsweise vier Stege auf der der Trägervorrichtung zugewandten Seite auf. Auf diese Weise entstehen zwei bis drei Nuten zwischen der Trägervorrichtung und dem besagten Belagträger.In a further particular embodiment, the lining carrier has at least three, preferably four webs on the side facing the carrier device. In this way, two to three grooves are formed between the carrier device and said lining carrier.

In einer weiteren besonderen Ausführungsform weist der Belagträger mindestens zwei Stege auf der dem Belag zugewandten Seite auf. Besonders bevorzugt weist der Belagträger mindestens drei Stege auf. Dadurch entstehen mindestens eine, vorzugsweise zwei Nuten zwischen dem Belagträger und dem auf dem Belagträger fixierten Belag.In a further particular embodiment, the lining carrier has at least two webs on the side facing the lining. Particularly preferably, the lining carrier has at least three webs. This results in at least one, preferably two Grooves between the lining carrier and the lining fixed on the lining carrier.

In einer besonders bevorzugten Ausführungsform erstreckt sich die mindestens eine Nut durchlaufend auf der gesamten Längsachse des Belagträgers.In a particularly preferred embodiment, the at least one groove extends continuously over the entire longitudinal axis of the lining carrier.

Durch eine solche besagte Nut kann eine Wärmeableitung stattfinden und somit der nachteilige Effekt einer durch Reibung entstehenden Wärmeentwicklung reduziert werden. Dies hat einen positiven Effekt auf die Laufzeit des Belagträgers. Weiterhin ergibt sich ein positiver Effekt auf die Flexibilität des Belagträgers gegenüber Schwer- und Anpresskraft. Durch die leichtere Bauweise entsteht weiterhin eine Materialersparnis.Through such a groove, a heat dissipation can take place and thus the adverse effect of a heat generated by friction heat can be reduced. This has a positive effect on the duration of the lining wearer. Furthermore, there is a positive effect on the flexibility of the lining carrier with respect to heavy and pressing force. Due to the lighter construction, material savings continue to be achieved.

Der Belagträger kann ausserdem Befestigungselemente aus Metall aufweisen, zum Beispiel Ösen, die sich für eine Entsorgung leicht von dem Schleifschuhbelag entfernen lassen.The lining carrier may also include metal fasteners, for example eyelets, which are easily removed from the sanding pad for disposal.

Der erfindungsgemässe Belagträger dient als Auflageelement für einen Schleifbelag, umfassend eine Polsterung und/oder eine Gleitfläche. Das Polstermaterial und/oder die Gleitfläche kann auf den Belagträger festgeklebt, verschweisst, mit Befestigungselementen fixiert sein oder als haftender Belag aufgetragen sein. Vorzugsweise besteht eine Verbindung, die den durch das Schleifband auftretenden Zug-, Dehn und/oder Scherkräften standhält. Ein Belagträger mit einem entsprechend Schleifbelag bildet einen Schleifschuhbelag.The lining carrier according to the invention serves as a support element for an abrasive coating comprising a padding and / or a sliding surface. The cushioning material and / or the sliding surface may be glued to the lining carrier, welded, fixed with fastening elements or applied as an adhesive covering. Preferably, there is a connection that withstands the tensile, tensile and / or shear forces that occur through the abrasive belt. A lining carrier with a corresponding abrasive coating forms a Schleifschuhbelag.

Der Belagträger stellt eine Verbindung des Schleifbelags zu einer Trägervorrichtung her. Eine solche Trägervorrichtung ist insbesondere ein Schleifschuh, umfassend einen Schleifschuhbelag, weiterhin umfassend einen Belagträger und einen Schleifbelag.The lining carrier establishes a connection of the abrasive coating to a carrier device. Such a carrier device is in particular a grinding shoe, comprising a sanding shoe lining, further comprising a lining carrier and an abrasive coating.

Der Schleifschuhbelag kann auf die Trägervorrichtung/den Schleifschuh geklebt, gespannt, mit oder ohne zusätzliche Befestigungsmittel fixiert werden oder als haftender Belag aufgetragen sein. Besonders bevorzugt ist der Schleifschuhbelag in eine Ausnehmung eines Schleifschuhs schiebbar und befestigbar.The sanding pad can be glued to the support device / sanding shoe, clamped, fixed with or without additional fasteners or applied as an adhesive coating. Particularly preferably, the sanding pad is slidable and fastened in a recess of a sanding shoe.

In einer vorteilhaften Ausführung der Erfindung weist der Belagträger mit samt Belag mindestens eine Anschlagfläche zur Aufnahme von Querkräften auf. Diese Anschlagfläche schliesst mit einer Ebene parallel zu der Anpressfläche einen Winkel ein. Vorzugsweise ist der Winkel zwischen Anschlagfläche und Anpressfläche ein stumpfer Winkel, d.h. kleiner als 180° und grösser als 90°, vorzugsweise beträgt er etwa 115° bis 130°.In an advantageous embodiment of the invention, the lining carrier with velvet coating on at least one stop surface for receiving transverse forces. This abutment surface encloses an angle parallel to the contact surface with a plane. Preferably, the angle between abutment surface and contact surface is an obtuse angle, i. less than 180 ° and greater than 90 °, preferably it is about 115 ° to 130 °.

In einer weiteren bevorzugten Ausführungsform weist der Belagträger auf der dem Belag abgewandten, respektive der der Trägervorrichtung zugewandten Seite in der Querachse eine schwalbenschwanzförmige Verbreiterung auf. Diese Verbreiterung erleichtert das Bestücken der Trägervorrichtung, insbesondere des Schleifschuhs mit dem Belagträger.In a further preferred embodiment, the lining carrier has a dovetail-shaped broadening in the transverse axis on the side facing away from the lining or the side facing the carrier device in the transverse axis. This broadening facilitates the loading of the support device, in particular of the sanding pad with the lining carrier.

In einer besonderen Ausführungsform weist der Belagträger einen wie oben geschilderte schwalbenschwanzförmige Verbreiterung auf und zudem steigt die Auflagefläche in einem Winkel von zwischen 4° und 9° bis zur ebenen Anpress- oder Kontaktfläche an. Dies bildet dann eine Ein- und Auslaufschräge. Alternativ kann die schwalbenschwanzförmige Verbreiterung auch ganz fehlen und der Belagträger weist lediglich eine Ein- und Auslaufschräge auf. Vorzugsweise besteht ein erfindungsgemässer Belagträger aus einem nichtmetallischen Material. Dadurch werden die positiven Effekte auf die Wärmeleitung noch verstärkt. Diese Ausgangsstoffe sind preiswert und leichter zu entsorgen.In a particular embodiment, the lining carrier has a dovetail-shaped broadening as described above and, moreover, the bearing surface rises at an angle of between 4 ° and 9 ° as far as the flat pressing or contact surface. This then forms an inlet and outlet slope. Alternatively, the dovetail widening may be completely absent and the lining carrier has only one inlet and outlet bevel. Preferably, a lining carrier according to the invention consists of a non-metallic material. This enhances the positive effects on heat conduction. These starting materials are inexpensive and easier to dispose of.

In einer bevorzugten Ausführungsform besteht der Belagträger im Wesentlichen aus einem Zellulosewerkstoff, insbesondere einem Holz- und/oder Baumwollwerkstoff und/oder einem Polymerwerkstoff.In a preferred embodiment, the lining carrier essentially consists of a cellulose material, in particular a wood and / or cotton material and / or a polymer material.

Besonders bevorzugt handelt es sich bei dem Werkstoff um ein MDF, ein HDF oder um ein Fibermaterial, d.h., aufgeschlossene Baumwolle. Die Auswahl zeigt die grosse Variabilität der Materialien hinsichtlich ihrer Festigkeit oder Elastizität. Die Werkstoffe können in Kombination oder jeweils allein vorliegen.Most preferably, the material is an MDF, an HDF, or a fibrous material, i.e., pulped cotton. The selection shows the great variability of the materials in terms of their strength or elasticity. The materials can be present in combination or alone.

In einer besonderen Ausführungsform ist der Belagträger mit einem Belag aus einem Gleitmaterial, bevorzugt Grafit oder einer Grafitverbindung versehen.In a particular embodiment, the lining carrier is provided with a lining made of a sliding material, preferably graphite or a graphite compound.

Bevorzugt ist der Schleifschuhbelag mit einem Polstermaterial versehen.Preferably, the sanding pad is provided with a cushioning material.

Das Polstermaterial kann zumindest auf einem Teil seiner Dicke mit dem Gleitmaterial, bevorzugt Grafit oder einer Grafitverbindung, durchsetzt oder versehen sein. Das Polstermaterial kann eine Offenporige Struktur mit einer grossen Oberfläche aufweisen. Bevorzugt handelt es sich bei dem Polstermaterial um einen Schaumstoff, insbesondere einen PU-Schaumstoff, und/oder einen Filz.The cushioning material may be interspersed or provided with the sliding material, preferably graphite or a graphite compound, at least over part of its thickness. The cushioning material may have an open-pore structure with a large surface area. The cushioning material is preferably a foam, in particular a PU foam, and / or a felt.

In einer bevorzugten Ausführungsform weist der Belagträger eine Länge zwischen 1'000mm und 5'000mm auf, insbesondere zwischen 1'200 und 2000 und 4'000mm, besonders bevorzugt zwischen 1'400 und 4'000mm auf. Der Belagträger weist zudem eine Breite zwischen 200 und 60mm auf, bevorzugt zwischen 150 und 70mm, besonders bevorzugt zwischen 115 und 80mm, gemessen an der breitesten Stelle. In einer bevorzugten Ausführungsform ist der Belagträger zu der dem Belag zugewandten Seite schwalbenschwanzförmig verjüngt. Dadurch ergibt sich in einer seitlichen Profilansicht eine breiteste Stelle gemäss oben gemachten Dimensionsangaben, sowie eine schmale Stelle auf welcher der Belag angebracht wird. Diese schmale Stelle des Belagträgers weist im Profil eine breite von zwischen 150 und 20mm, bevorzugt zwischen 100 und 30mm, besonders bevorzugt zwischen 90 und 40mm auf.In a preferred embodiment, the lining carrier has a length of between 1,000 and 5,000 mm, in particular between 1,200 and 2,000 and 4,000 mm, particularly preferably between 1,400 and 4'000mm up. The lining carrier also has a width between 200 and 60 mm, preferably between 150 and 70 mm, particularly preferably between 115 and 80 mm, measured at the widest point. In a preferred embodiment, the lining carrier is tapered to the side facing the lining dovetail-shaped. This results in a lateral profile view of a widest point according to the dimensions given above, and a narrow point on which the pad is attached. This narrow point of the lining carrier has in profile a width of between 150 and 20 mm, preferably between 100 and 30 mm, particularly preferably between 90 and 40 mm.

Die Dicke des Belagträgers ist im Profil zwischen 2 und 10mm, bevorzugt zwischen 3 und 8mm, bevorzugt zwischen 4 und 5mm.The thickness of the lining carrier is in profile between 2 and 10mm, preferably between 3 and 8mm, preferably between 4 and 5mm.

Ein weiterer Aspekt der vorliegenden Erfindung betrifft einen Schleifschuhbelag zur Verwendung in einem Schleifschuh zum Anpressen von Schleifflächen an Werkstücken in Segment- und Breitbandschleifmaschinen. Der Schleifschuhbelag besteht im Wesentlichen aus einem Belagträger aus Zellulosewerkstoff und einem Schleifbelag aus einer Polsterschicht und einer Gleitschicht. Der Belagträger ist so ausgestaltet, dass er formschlüssig in oder an einem Schleifschuh befestigt werden kann. Bevorzugt weist der Belagträger eine Anschlagfläche, insbesondere eine schwalbenschwanzförmige Verjüngung auf, die auf der Trägervorrichtung komplementär ausgebildet ist. Dadurch kann der Schleifschuhbelag in die Trägervorrichtung befestigt oder bespannt werden. Der Schleifschuhbelag ist bis auf mindestens eine Ausnehmung formschlüssig in die Trägervorrichtung einpassbar.Another aspect of the present invention relates to a sanding pad for use in a sanding shoe for pressing abrasive surfaces on workpieces in segment and wide belt sanding machines. The sanding pad consists essentially of a lining carrier made of cellulose material and an abrasive coating of a cushion layer and a sliding layer. The lining carrier is designed so that it fits positively into or can be attached to a sanding shoe. Preferably, the lining carrier has a stop surface, in particular a dovetail-shaped taper, which is designed to be complementary on the carrier device. As a result, the sanding shoe lining can be fastened or covered in the support device. The grinding shoe lining can be fitted in a form-fitting manner into the carrier device, except for at least one recess.

Durch die Ausnehmung kann im Betrieb ein Wärmetausch zwischen dem Schleifschuhbelag und der Umgebung stattfinden.
Bevorzugt sind auf der Oberfläche des Schleifschuhbelags Stege ausgebildet, wodurch mindestens eine Nut entsteht. Die Nut kann sich in einer besonders bevorzugten Ausführungsform durchgehend in der Längsachse auf der gesamten Länge des Schleifschuhbelags erstrecken.Through the recess, a heat exchange between the sanding shoe lining and the environment can take place during operation.
Webs are preferably formed on the surface of the Schleifschuhbelags, whereby at least one groove is formed. In a particularly preferred embodiment, the groove may extend continuously in the longitudinal axis over the entire length of the sanding shoe lining.

In einer weiteren bevorzugten Ausführungsform ist zudem auch mindestens eine Nut im Belagträger zwischen dem Belagträger und dem Schleifbelag eingebracht.In a further preferred embodiment, moreover, at least one groove is also inserted in the lining carrier between the lining carrier and the abrasive coating.

Ein weiterer Aspekt der vorliegenden Erfindung betrifft einen Schleifschuh zum Anpressen von Schleifflächen an Werkstücken in Segment- und Breitbandschleifmaschinen. Der Schleifschuh umfasst eine Trägervorrichtung und einen Schleifschuhbelag. Die Trägervorrichtung ist so ausgestaltet, dass sie den Schleifschuhbelag im Wesentlichen passgenau aufnehmen kann. Zwischen Schleifschuhbelag und Trägervorrichtung besteht mindestens eine Ausnehmung.Another aspect of the present invention relates to a grinding shoe for pressing grinding surfaces on workpieces in segment and wide-belt sanding machines. The sanding pad comprises a support device and a sanding pad. The carrier device is designed such that it can absorb the sanding shoe lining substantially accurately. There is at least one recess between the sanding shoe lining and the carrier device.

Die Ausnehmung kann im Scheifschuh und/oder in der Trägervorrichtung vorgesehen sein.The recess may be provided in the Scheifschuh and / or in the carrier device.

In einer bevorzugten Ausführungsform umfasst der Schleifschuh mindestens eine Ausnehmung, insbesondere gebildet durch Stege und/oder Nuten auf oder an der der Trägervorrichtung zugewandten Seite des Schleifschuhbelages (8) und/oder durch Stege auf oder an der Trägervorrichtung.In a preferred embodiment, the sanding pad comprises at least one recess, in particular formed by webs and / or grooves on or on the side facing the carrier device side of the Schleifschuhbelages (8) and / or by webs on or on the support device.

In einer weiteren bevorzugten Ausführungsform weist die Trägervorrichtung mindestens eine Ausnehmung auf, insbesondere gebildet durch Stege und/oder Nuten (10). Die Stege können aufgeklebte oder aufgeschweisste Leisten sein, oder durch eingefräste oder eingeschliffene Profile oder Nuten entstehen. Bevorzugt bestehen Sie aus demselben Material wie die Trägervorrichtung.In a further preferred embodiment, the carrier device has at least one recess, in particular formed by webs and / or grooves (10). The webs may be glued or welded strips, or by milled or ground profiles or grooves arise. Preferably, they are made of the same material as the carrier device.

Herstellungsverfahren eines erfindungemässen Belagträgers sind dem Fachmann hinlänglich bekannt. Als besonders geeignet haben sich Extrusion, formgebendes Fräsen, Profilfräsen und Spritzguss erwiesen.Production methods of a lining carrier according to the invention are well known to the person skilled in the art. Extrusion, shaping milling, profile milling and injection molding have proven particularly suitable.

Im Folgenden wir die vorliegende Erfindung anhand von Ausführungsbeispielen und Zeichnungen näher erläutert, ohne sich auf diese zu beschränken.

Figur 1
zeigt eine schematische Zeichnung eines erfindungsgemässen Belagträgers,
Figur 2
zeigt eine schematische Zeichnung eines erfindungsgemässen Schleifschuhbelags,
Figur 3
zeigt eine schematische Zeichnung eines erfindungsgemässen Schleifschuhbelags, der in eine Trägervorrichtung eingespannt ist,
Figur 4
zeigt eine schematische Schnittdarstellung einer Bandschleifmaschine mit einem Schleifschuh,
Figur 5
zeigt eine schematische Zeichnung eines Zwischenproduktes in der Herstellung eines erfindungsgemässen Belagträgers,
Figur 6
zeigt eine schematische Zeichnung eines erfindungsgemässen Belagträgers,
Figur 7a
zeigt eine schematische Zeichnung einer besonderen Ausführungsform des erfindungsgemässen Belagträgers,
Figur 7b
zeigt eine schematische Zeichnung einer besonderen Ausführungsform des erfindungsgemässen Schleifschuhbelags,
Figur 8
zeigt eine schematische Zeichnung einer weiteren besonderen Ausführungsform des erfindungsgemässen Belagträgers,
Figur 8b
zeigt eine schematische Zeichnung einer weiteren besonderen Ausführungsform des erfindungsgemässen Schleifschuhbelags, und
Figuren 9a und 9b
zeigen schematische Zeichnungen exemplarischer Schleifschuhe die mit erfindungsgemässen Schleifschuhbelägen gemäss Fig. 7a und 7b bestückt sind.
Figur 10
zeigt eine schematische Zeichnung einer alternativen Ausführungsform der vorliegenden Erfindung
Figur 1 zeigt eine schematische Schnittdarstellung eines Belagträgers 1 mit mehreren Stegen und resultierenden Nuten.In the following, we will explain the present invention with reference to exemplary embodiments and drawings, without being limited to these.
FIG. 1
shows a schematic drawing of a lining carrier according to the invention,
FIG. 2
shows a schematic drawing of an inventive Schleifschuhbelags,
FIG. 3
shows a schematic drawing of an inventive Schleifschuhbelags, which is clamped in a support device,
FIG. 4
shows a schematic sectional view of a belt grinding machine with a sanding pad,
FIG. 5
shows a schematic drawing of an intermediate in the production of a lining carrier according to the invention,
FIG. 6
shows a schematic drawing of a lining carrier according to the invention,
Figure 7a
shows a schematic drawing of a particular embodiment of the inventive pad carrier,
FIG. 7b
shows a schematic drawing of a particular embodiment of the inventive Schleifschuhbelags,
FIG. 8
shows a schematic drawing of a further particular embodiment of the inventive pad carrier,
FIG. 8b
shows a schematic drawing of another particular embodiment of the inventive Schleifschuhbelags, and
FIGS. 9a and 9b
show schematic drawings of exemplary sanding shoes according to the invention with Schleifschuhbelägen Fig. 7a and 7b are equipped.
FIG. 10
shows a schematic drawing of an alternative embodiment of the present invention
FIG. 1 shows a schematic sectional view of a lining carrier 1 with a plurality of webs and resulting grooves.

Der Belagträger 1 weist eine im Wesentlichen schwalbenschwanzförmige Form aus, die sich gegen die dem Belag (nicht gezeigt) zugewandten Seite 2 verjüngt. Auf der dem Belag zugewandten Seite 2, in der schematischen Schnittdarstellung des Profils oben, befinden sich drei Stege 4a, 4b und 4c. Der ganze Belagträger ist im Wesentlichen in Bezug auf eine vertikale Symmetrieachse spiegelsymmetrisch aufgebaut. Die Stege 4a und 4c liegen sich an einer gedachten Symmetrieachse gegenüber und sind gleich gross. Der Steg 4b trennt die dem Belag zugewandte Seite des Belagträgers mit zwei Nuten 5a und 5b.The lining carrier 1 has a substantially dovetail-shaped shape, which tapers against the side 2 facing the lining (not shown). On the side facing the covering 2, in the schematic sectional view of the profile above, there are three webs 4a, 4b and 4c. The entire lining carrier is essentially mirror-symmetrical in relation to a vertical axis of symmetry. The webs 4a and 4c are opposite to an imaginary axis of symmetry and are the same size. The web 4b separates the lining facing side of the lining carrier with two grooves 5a and 5b.

Die Nuten 5a und 5b sind durchlaufend in der gesamten Längsachse des Belagträgers 1.The grooves 5a and 5b are continuous in the entire longitudinal axis of the lining carrier. 1

Auf der der Trägervorrichtung zugewandten Seite 3 (in der Profilansicht unten) befinden sich fünf Stege 6a, 6b, 6c, 6d und 6e. Dadurch entstehen auf dieser Seite vier im Wesentlichen gleichförmige Nuten 7a, 7b, 7c und 7d.On the side facing the carrier device 3 (in the profile view below) are five webs 6a, 6b, 6c, 6d and 6e. As a result, four substantially uniform grooves 7a, 7b, 7c and 7d are formed on this side.

Figur 2 zeigt eine schematische Profilsicht eines zweiten Ausführungsbeispiels für einen Schleifschuhbelag 8. Ebenfalls schematisch ist ein auf dem Belagträger 1 befestigter Belag 9 gezeigt. Der Belag 9 besteht aus Filz oder Schaumstoff, das auf seiner Dicke mit einem Gleitmaterial bevorzugt mit Grafit oder einer Grafitverbindung durchsetzt ist. FIG. 2 shows a schematic profile view of a second embodiment of a Schleifschuhbelag 8. Also schematically a fixed on the lining carrier 1 pad 9 is shown. The pad 9 is made of felt or foam, which is preferably interspersed in its thickness with a sliding material with graphite or a graphite compound.

Figur 3 zeigt eine schematische Profilansicht eines Ausführungsbeispiels eines erfindungsgemässen Schleifschuhs 11. Der Belagträger 1 bildet mit einer Trägervorrichtung 10 den Schleifschuh 11. Die schwalbenschwanzförmige Ausgestaltung des Belagträgerprofils ermöglicht das Einbringen in eine Führungsschiene. Dies erleichtert das Bespannen des Schleifschuhs 11. Auf den Belagträger ist zudem ein Belag 9 angebracht. Der Belag 9 besteht aus einem Polstermaterial aus Filz oder Schaumstoff. Die Filz- oder Schaumstoffbelag 9 hat eine Dicke von 3 bis 4mm, bevorzugt von 3 bis 3,5mm. Der Filz hat vorzugsweise ein Volumengewicht von ca. 0,2 bis 0,7g/cm3. Für die erfindungsgemässe Ausführungsform geeignete Filze und Schaumstoffe sind z.B. unter der Bezeichnung Wollfilz bei VFG, in DE-Gingen erhältlich. Zur Befestigung des Filzes 9 an den Belagträger 1 kann Hotmelt, respektive PU-Klebstoff verwendet werden. Die Trägervorrichtung 10 besteht aus Aluminium. FIG. 3 shows a schematic profile view of an embodiment of an inventive abrasive shoe 11. The lining carrier 1 forms with a carrier device 10, the grinding shoe 11. The dovetail-shaped configuration of the lining carrier profile allows insertion into a guide rail. This facilitates the stringing of the sanding pad 11. On the pad carrier also a pad 9 is attached. The pad 9 is made of a padding material made of felt or foam. The felt or foam pad 9 has a thickness of 3 to 4mm, preferably from 3 to 3.5mm. The felt preferably has a volume weight of about 0.2 to 0.7 g / cm 3 . Suitable felts and foams for the embodiment according to the invention are available, for example, under the name wool felt from VFG, in DE-Gingen. To attach the felt 9 to the lining carrier 1, hotmelt or PU adhesive can be used. The support device 10 is made of aluminum.

Figur 4 zeigt eine schematische Schnittdarstellung im Profil einer Bandschleifmaschine 20 mit einem Schleifschuh 11. Ein Werkstück 12 wird auf einem Schleiftisch 13 unter einem umlaufenden Schleifband 14 gefördert. Das Schleifband 14 wird von drei Antriebswalzen 15 in einer Laufrichtung 16 angetrieben und durch den Schleifschuh 11 gegen das Werkstück 12 gepresst. FIG. 4 shows a schematic sectional view in the profile of a belt grinding machine 20 with a sanding pad 11. A workpiece 12 is conveyed on a grinding table 13 under a revolving belt 14. The grinding belt 14 is driven by three drive rollers 15 in a running direction 16 and pressed by the grinding shoe 11 against the workpiece 12.

Figur 5 zeigt einen Zwischenschritt in einem Herstellungsverfahren eines erfindungsgemässen Belagträgers 1. Nach der Fertigung wird der Rohling 21 in einer Schnittebene 30 in zwei Belagträger 1 zerteilt. Die resultierenden Belagträger 1 weisen auf der der Trägervorrichtung zugewandten Seite A fünf Stege auf. Dadurch ergeben sich vier Nuten. Die dem Belag zugewandte Seite B der Belagträger 1 kann gegebenenfalls noch glattgeschliffen werden bevor ein Belag appliziert wird. FIG. 5 shows an intermediate step in a manufacturing process of a lining carrier 1 according to the invention. After production, the blank 21 is divided into two lining carriers 1 in a sectional plane 30. The resulting lining carriers 1 have five webs on the side A facing the carrier device. This results in four grooves. If necessary, the side B of the lining carrier 1 facing the lining can still be ground smooth before a coating is applied.

In Figur 6 ist eine weitere besondere Ausführungsform des erfindungsgemässen Belagträgers 1 gezeigt. Der Belagträger weist in der Profilsicht eine Breite von 82,3mm auf. Die Dicke beträgt 4,7mm. Der Belagträger 1 ist symmetrisch aufgebaut. Die Stege 6b, 6c und 6d sind 7,6 mm - 8,0 mm breit und liegen insgesamt 12,4 mm - 12,8 mm auseinander. Dadurch ergeben sich zwei mittige Nuten 7b und 7c, die je 12,6mm breit sind. Der Belagträger ist weiterhin gegenüber der dem Belag zugewandten Seite schwalbenschwanzförmig verjüngt. Zwei weitere Stege 6a und 6e befinden sich an den auslaufenden Enden der schwalbenschwanzförmigen Begrenzung and den Seiten des Belagträgers 1. Es entstehen dadurch zwei weitere Nuten 7a und 7d von je 16.15mm Breite. Der Belagträger 1 weist eine Länge von 685mm auf.In FIG. 6 is a further particular embodiment of the inventive pad carrier 1 is shown. The lining carrier has a width of 82.3 mm in the profile view. The thickness is 4.7mm. The lining carrier 1 is constructed symmetrically. The bridges 6b, 6c and 6d are 7.6mm-8.0mm wide and are 12.4mm-12.8mm apart. This results in two central grooves 7b and 7c, which are each 12.6mm wide. The lining carrier is further tapered dovetailed with respect to the side facing the lining. Two further webs 6a and 6e are located at the outgoing ends of the dovetail-shaped boundary on the sides of the lining carrier 1. This results in two further grooves 7a and 7d, each 16.15mm wide. The lining carrier 1 has a length of 685mm.

Figur 7a zeigt eine besondere Ausführungsform des erfindungsgemässen Belagträgers 1. Der Belagträger 1 weist die vorgängig geschilderte in Wesentlichen schwalbenschwanzförmige Form an den seitlichen Enden 6a, 6f mit einen Neigungswinkel von 30° in Bezug auf das Lot der Anpressfläche. Auf der Oberseite (dem Belag zugewandt) befinden sich drei Stege 4a, 4b und 4c, wodurch zwei Nuten 5a und 5b gebildet werden. Auf der Unterseite (der Trägervorrichtung zugewandt) befinden sich sechs Stege 6a, 6b, 6c, 6d, 6e und 6f was wiederum zu fünf Nuten 7a, 7b, 7c, 7d und 7e führt. Der Schwalbenschwanz geht an den seitlichen Enden 6a und 6f in eine Ein- und Auslaufschräge über, welche gleichzeitig die Stege 4a und 4c bildet. Die durch die Stege des Schwalbenschwanzes 6a und 6f und die Stege 6b und 6d gebildeten Nuten 7a und 7e sind parallel zu den Ein- und Auslaufschrägen 4a und 4b angeordnet. Figure 7a shows a particular embodiment of the inventive pad carrier 1. The pad carrier 1 has the previously described substantially dovetail shape at the lateral ends 6a, 6f with an inclination angle of 30 ° with respect to the solder of the contact surface. On the upper side (facing the lining) are three webs 4a, 4b and 4c, whereby two grooves 5a and 5b are formed. On the underside (facing the carrier device) there are six webs 6a, 6b, 6c, 6d, 6e and 6f, which in turn leads to five grooves 7a, 7b, 7c, 7d and 7e. The dovetail merges at the lateral ends 6a and 6f in an inlet and outlet slope, which simultaneously forms the webs 4a and 4c. The grooves 7a and 7e formed by the webs of the dovetail 6a and 6f and the webs 6b and 6d are arranged parallel to the inlet and outlet slopes 4a and 4b.

Der Belagträger 1 weist eine Profilbreite zwischen 80 - 85 mm, und insbesondere zwischen 82,2 - 82,4 mm auf. Der Steg 4b ist 54mm breit, die Stege 4a und 4c jeweils 11.15mm. Der Belagträger 1 ist an der dicksten Stelle 4,6 mm - 4,8 mm dick, an den dünnsten Stellen 2 - 3 mm, insbesondere 2,4 - 2,6 mm. Der Belagträger 1 weist eine Länge von zwischen 2000 mm und 3500 mm, insbesondere 3420 mm - 3440 mm auf.The lining carrier 1 has a profile width between 80 - 85 mm, and in particular between 82.2 - 82.4 mm. The web 4b is 54mm wide, the webs 4a and 4c each 11.15mm. The lining carrier 1 is at the thickest point 4.6 mm - 4.8 mm thick, at the thinnest points 2 - 3 mm, in particular 2.4 - 2.6 mm. The lining carrier 1 has a length of between 2000 mm and 3500 mm, in particular 3420 mm - 3440 mm.

Die Nuten 5a, 5b weisen eine Breite von 2,5 mm - 3,5 mm, insbesondere von 2,9 mm - 3,1 mm auf.The grooves 5a, 5b have a width of 2.5 mm - 3.5 mm, in particular from 2.9 mm - 3.1 mm.

Die schwalbenschwanzförmigen Anschlagflächen 6 schliessen mit der Vertikale (die senkrecht auf der Anpressfläche steht, einen Winkel α von bevorzugt 30° ein.The dovetail-shaped stop surfaces 6 close with the vertical (which is perpendicular to the contact surface, an angle α of preferably 30 °.

Der Ein- und Auslaufschrägen 4a, 4c schliessen mit der Anpressfläche einen Winkel β von 4 - 4,5°, insbesondere 4,32° ein.The inlet and outlet slopes 4a, 4c close with the contact surface an angle β of 4 - 4.5 °, in particular 4.32 °.

Figur 7b zeigt einen Schleifschuhbelag 8 mit einem Belagträger 1 wie er in Figur 7a gezeigt wird. Ein Belag 9 wurde auf den Belagträger aufgebracht. Der Belag 9 besteht aus einer Polsterschicht 40 und einer Gleitschicht 41. Bei der Polsterschicht 40 wurde synthetischer Nadelfilz verwendet. Für weiche Polster kann auch PU Schaum verwendet werden. FIG. 7b shows a Schleifschuhbelag 8 with a lining carrier 1 as in Figure 7a will be shown. A pad 9 was applied to the lining carrier. The pad 9 consists of a cushion layer 40 and a sliding layer 41. In the cushion layer 40 synthetic needle felt was used. For soft upholstery also PU foam can be used.

Figur 8a zeigt eine weitere besondere Ausführungsform des erfindungsgemässen Belagträgers 1. Der belagträger verfügt über fünf Stege 6a, 6b, 6c, 6d und 6e auf der der Trägervorrichtung zugewandten Seite, woraus vier Nuten 7a, 7b, 7c und 7d gebildet werden. Auf der dem Werkstück zugewandten Seite befinden sich drei Stege 4a, 4b und 4c und daraus resultieren zwei Nuten 5a und 5b. FIG. 8a shows a further particular embodiment of the inventive pad carrier 1. The pad carrier has five webs 6a, 6b, 6c, 6d and 6e on the carrier device side facing, from which four grooves 7a, 7b, 7c and 7d are formed. On the side facing the workpiece there are three webs 4a, 4b and 4c, resulting in two grooves 5a and 5b.

Figur 8b zeigt eine weitere besondere Ausführungsform eines Schleifschuhbelags 8 gemäss Belagträger 1 aus Figur 8a. FIG. 8b shows a further particular embodiment of a sanding pad 8 according to pad carrier 1 FIG. 8a ,

Figuren 9a und 9b zeigen mit erfindungsgemässen Schleifschuhbelägen 8 bestückte Schleifschuhe 11. Die Schleifschuhbeläge 8 sind mit den schwalbenschwanzförmigen Profilseiten an der Trägervorrichtung 10 fixiert. FIGS. 9a and 9b show with sanding pad 8 according to the invention fitted sneakers 11. The sanding pads 8 are fixed with the dovetail profile sides of the support device 10.

Figur 10 zeigt eine alternative Ausführungsform der vorliegenden Erfindung. Ein Schleifschuh 11 wurde mit einem konventionellen Schleifschuhbelag 8 bestückt, der auf der der Trägervorrichtung 10 zugewandten Fläche keine Ausnehmungen oder Stege aufweist. Die Trägervorrichtung indes verfügt über die Stege 6a, 6b, 6c und 6d. Woraus sich die Ausnehmungen 7a, 7b und 7c zwischen der Trägervorrichtung 10 und dem Schleifschuhbelag 8 ergeben. Die Ausnehmungen 7a, 7b, 7c können sich als Nuten 7a, 7b, 7c über die gesamte Länge des Schleifschuhs 11 erstrecken. Die Stege 6a, 6b, 6c und 6d können aufgeklebt sein oder Teil der Profilstruktur der Trägervorrichtung. FIG. 10 shows an alternative embodiment of the present invention. A sanding pad 11 was equipped with a conventional sanding pad 8, which has no recesses or webs on the surface facing the support device 10. The carrier device, however, has the webs 6a, 6b, 6c and 6d. What results in the recesses 7a, 7b and 7c between the support device 10 and the sanding pad 8. The recesses 7a, 7b, 7c may extend as grooves 7a, 7b, 7c over the entire length of the grinding shoe 11. The webs 6a, 6b, 6c and 6d may be glued or part of the profile structure of the support device.

Als Werkstoffe für die Herstellung des erfindungsgemässen Belagträgers eignen sich insbesondere MDF oder HDF oder Spanplatten oder WPC ("wood plastic composite").Suitable materials for the production of the lining carrier according to the invention are in particular MDF or HDF or chipboard or WPC ("wood plastic composite").

Vor allem MDF-Platten (Medium Densitiy Fiber Platten) mit einer Dichte von 750 bis 950kg/m3 und einer UF oder MUF-Bindung sind besonders geeignet. Diese Platten sind in genormter DIN 622 Teil 5, Ausführung von Herstellern wie Kronospan, CH-Menznau oder Kaindl, AT-Salzburg, unter der Bezeichnung Standard MDF (z.B. Fluri) erhältlich. MDF-Platten können bevorzugt in einer Dicke von 3 bis 6mm als Belagträger verwendet werden. Besonders geeignet sind Dicken von 4,4 bis 5mm.Above all, MDF (Medium Density Fiber Plates) with a density of 750 to 950 kg / m 3 and a UF or MUF bond are particularly suitable. These panels are available in standardized DIN 622 Part 5, manufactured by manufacturers such as Kronospan, CH-Menznau or Kaindl, AT-Salzburg, under the name Standard MDF (eg Fluri). MDF boards can preferably be used in a thickness of 3 to 6 mm as a backing. Particularly suitable are thicknesses of 4.4 to 5mm.

WPC ist ein Verbund aus Holzfasern und Thermoplasten. Bei der Herstellung erfindungsgemässer Belagträger aus WPC werden Holzfasern getrocknet und mit einem hochdichten Polyethylen gemischt (HDPE). Unter hohen Temperaturen plastifiziert das HDPE und umschliesst die Holzfasern vollständig. Ein WPC Granulat wird erzeugt. Als besonders geeignet haben sich Mischverhältnisse von 60:40 bis 85:15 Naturfaser zu Thermoplasten erwiesen.WPC is a composite of wood fibers and thermoplastics. Wood fibers are dried and mixed with a high-density polyethylene (HDPE) in the production of lining carriers according to the invention from WPC. Under high temperatures, the HDPE plasticizes and completely encloses the wood fibers. A WPC granulate is produced. Mixing ratios of 60:40 to 85:15 natural fiber to thermoplastics have proven particularly suitable.

Für die Herstellung erfindungsgemässer Belagträger aus WPC ist die Strangextrusion geeignet. Das Granulat wird in einen Extruder gefüttert, aufgeschmolzen und verdichtet. Mit einer Formgebenden Öffnung für die erfindungsgemässen Profile (siehe zum Beispiel Fig. 1, 6, 7 oder) extrudiert man den Belagträger. Der resultierende Belagträger wird in einem Wasserkühlbad abgekühlt und in entsprechende Längen geschnitten, zum Beispiel in Längen von 600mm bis 5000mm.For the production of backing pad made of WPC according to the invention, extrudate extrusion is suitable. The granules are fed into an extruder, melted and compacted. With a shaping opening for the inventive profiles (see, for example Fig. 1 . 6 . 7 or) one extrudes the lining carrier. The resulting lining carrier is cooled in a water cooling bath and cut into appropriate lengths, for example in lengths of 600mm to 5000mm.

Claims (18)

  1. Lining carrier (1) for a sanding-shoe lining (8), in particular for use in a sanding shoe (11) for pressing sanding faces on to workpieces (12) in segment-belt and wide-belt sanding machines (20), wherein the lining carrier (1) has at least one recess (5a, 5b, 7a, 7b, 7c, 7d, 7e) on the face of the lining carrier (1) that is to face toward the carrier device (10), in particular a groove (5a, 5b, 7a, 7b, 7c, 7d, 7e), in addition preferably on the face of the lining carrier (1) that is to face toward the lining (9), for the purpose of heat exchange with the environment.
  2. Lining carrier (1) according to Claim 1, wherein the recess is formed by at least two webs (4a, 4b, 4c, 6a, 6b, 6c, 6d, 6e, 6f), which enclose a groove (5a, 5b, 7a, 7b, 7c, 7d, 7e), preferably in the longitudinal axis of the lining carrier (1), on the face of the lining carrier (1) that is to face toward the lining (9) and/or the carrier device (10).
  3. Lining carrier (1) according to Claim 1, wherein the lining carrier has a length of between 600 mm and 4000 mm, preferably between 650 mm and 3500 mm.
  4. Lining carrier according to any one of Claims 1 to 3, wherein the lining carrier has at least five webs (4a, 4b, 4c, 6a, 6b, 6c, 6d, 6e, 6f), in particular a total of nine webs (4a, 4b, 4c, 6a, 6b, 6c, 6d, 6e, 6f).
  5. Lining carrier (1) according to any one of Claims 1 to 4, wherein the lining carrier (1) has at least one stop face for taking up transverse forces, in particular a swallowtail-shaped profile.
  6. Lining carrier (1) according to any one of Claims 1 to 5, wherein the lining carrier (1) has a width of between 60 mm and 1000 mm, preferably between 70 mm and 90 mm.
  7. Lining carrier (1) according to any one of Claims 1 to 6, wherein the lining carrier (1) contains or is composed of a non-metallic material, in particular contains or is composed of a cellulose material, in particular wood material and/or a cotton material and/or a polymer material.
  8. Lining carrier (1) according to Claim 7, wherein the non-metallic material contains or is composed of a wood material and/or cotton material, in particular contains or is composed of an MDF, a HDF or a fiber material.
  9. Lining carrier (1) according to Claim 7, wherein the lining carrier (1) contains or is composed of a composite material, in particular a wood-and-plastic composite material.
  10. Lining carrier (1) according to any one of Claims 1 to 9, wherein the lining carrier has a side (3) that faces toward a carrier device when in use and has a side (4) that faces away from the carrier device when in use, and wherein the number of webs (4a, 4b, 4c, 6a, 6b, 6c, 6d, 6e, 6f) and recesses (5a, 5b, 7a, 7b, 7c, 7d, 7e) is designed so as to be different in each case.
  11. Lining carrier (1) according to Claim 10, wherein the side (3) that faces toward the carrier device has six webs (6a, 6b, 6c, 6d, 6e, 6f).
  12. Lining carrier (1) according to Claim 10, wherein the side (3) that faces toward the carrier device has five webs (6a, 6b, 6c, 6d, 6e).
  13. Sanding-shoe lining (8), in particular for use in a sanding shoe (11) for pressing sanding faces on to workpieces (12) in segment-belt and wide-belt sanding machines (20), comprising a lining carrier (1) according to Claim 1, and a sanding lining (9), which comprises a cushion layer (41) and/or a slide lining (40).
  14. Sanding-shoe lining (8) according to Claim 13, wherein the cushion layer (41) contains or is composed of a foam or a felt, in particular contains or is composed of a PU foam or a needle felt.
  15. Sanding-shoe lining (8) according to either one of Claims 13 or 14, wherein the slide lining contains or is composed of a graphite compound.
  16. Sanding shoe (11) for pressing sanding faces on to workpieces (12) in segment-belt and wide-belt sanding machines (20), comprising a carrier device (10) and a sanding-shoe lining (8), comprising a lining carrier (1) and a sanding lining (9), in particular a sanding-shoe lining according to any one of Claims 13 to 15, wherein the carrier device is designed to accommodate the sanding-shoe lining (8) substantially with a precise fit, characterized in that there is at least one recess (7a, 7b, 7c, 7d, 7e) between the sanding-shoe lining (8) and the carrier device (10), for the purpose of heat exchange with the environment.
  17. Sanding shoe according to Claim 16, characterized in that the at least one recess is formed, in particular, by webs or grooves (7a, 7b, 7c, 7d, 7e) on or at the side (3) of the sanding-shoe lining (8) that faces toward the carrier device (10).
  18. Sanding shoe according to Claim 16, characterized in that the at least one recess (7a, 7b, 7c, 7d, 7e) is provided for heat exchange with the environment, in particular formed by webs (6a, 6b, 6c, 6d, 6e, 6f) and/or grooves on the carrier device (10).
EP11721290.2A 2010-05-27 2011-05-16 Abrasive lining holder with recesses Active EP2576137B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11721290.2A EP2576137B1 (en) 2010-05-27 2011-05-16 Abrasive lining holder with recesses

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10164153A EP2390054A1 (en) 2010-05-27 2010-05-27 Skate lining holder with recesses
PCT/EP2011/057883 WO2011147709A1 (en) 2010-05-27 2011-05-16 Sanding pad lining carrier with recesses
EP11721290.2A EP2576137B1 (en) 2010-05-27 2011-05-16 Abrasive lining holder with recesses

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EP2576137A1 EP2576137A1 (en) 2013-04-10
EP2576137B1 true EP2576137B1 (en) 2017-07-12

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EP10164153A Withdrawn EP2390054A1 (en) 2010-05-27 2010-05-27 Skate lining holder with recesses
EP11721290.2A Active EP2576137B1 (en) 2010-05-27 2011-05-16 Abrasive lining holder with recesses

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EP10164153A Withdrawn EP2390054A1 (en) 2010-05-27 2010-05-27 Skate lining holder with recesses

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US (2) US9085061B2 (en)
EP (2) EP2390054A1 (en)
CN (1) CN102971111B (en)
AU (1) AU2011257417B2 (en)
BR (1) BR112012030128A2 (en)
CA (1) CA2799326A1 (en)
NZ (1) NZ603146A (en)
WO (1) WO2011147709A1 (en)

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CA2999989C (en) * 2015-09-28 2020-06-30 Saint-Gobain Abrasives, Inc. Method and system for removing material from a workpiece
EP3178606B1 (en) * 2015-12-09 2019-09-25 Steinemann Technology AG Sanding shoe and a method for fixing the sanding shoe
USD803906S1 (en) * 2016-03-11 2017-11-28 Patrick Lehoux Sanding pad
DE102016120330A1 (en) * 2016-10-25 2018-04-26 Karl Heesemann Maschinenfabrik Gmbh & Co. Kg grinding machine
CN106891227A (en) * 2017-02-15 2017-06-27 青岛三山碳素有限公司 A kind of sander presses nog plate and preparation method thereof with fast-assembling
DE102017211192A1 (en) 2017-06-30 2019-01-03 Robert Bosch Gmbh Sanding pad and sanding shoe
DE102019207746A1 (en) 2019-05-27 2020-12-03 Robert Bosch Gmbh Method for determining status information relating to a belt grinding machine by means of a machine learning system
DE102019207745A1 (en) * 2019-05-27 2020-12-03 Robert Bosch Gmbh Method for detecting information provided on a grinding belt
JP7355670B2 (en) * 2020-02-05 2023-10-03 株式会社荏原製作所 Polishing head and polishing equipment

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US9085061B2 (en) 2015-07-21
US9878419B2 (en) 2018-01-30
EP2390054A1 (en) 2011-11-30
US20150298281A1 (en) 2015-10-22
CN102971111A (en) 2013-03-13
BR112012030128A2 (en) 2019-09-24
CN102971111B (en) 2016-09-28
WO2011147709A1 (en) 2011-12-01
RU2012157513A (en) 2014-07-10
NZ603146A (en) 2013-10-25
EP2576137A1 (en) 2013-04-10
AU2011257417B2 (en) 2016-07-14
CA2799326A1 (en) 2011-12-01
AU2011257417A1 (en) 2012-12-20
US20130059507A1 (en) 2013-03-07

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