Sanding pad lining carrier with recesses

Abstract

The present invention relates to lining carrier for a sanding pad lining, in particular for use with a sanding pad for pressing sanding surfaces against workplaces in segment-belt and wide-belt sanding machines. Here, the lining carrier has at least one recess, in particular a groove.

Claims

1. A sanding-shoe lining comprising: a lining carrier, a sanding lining for use in a sanding shoe for pressing a sanding surface against a workpiece in a segment-belt machine or a wide-belt sanding machine, the lining carrier producing a connection between the sanding-shoe lining and a carrier device, wherein the lining carrier has at least one recess on a face of the lining carrier that faces toward the carrier device, for heat exchange with an external environment.

2. The sanding-shoe lining as claimed in claim 1, wherein the recess is a groove.

3. The sanding-shoe lining as claimed in claim 1, wherein additionally at least one recess is on the face of the lining carrier that faces toward the lining.

4. The sanding-shoe lining as claimed in claim 1, wherein the recess is formed by at least two webs, which enclose a groove.

5. The sanding-shoe lining as claimed in claim 4, wherein the recess is in a longitudinal axis of the lining carrier.

6. The sanding-shoe lining as claimed in claim 1, wherein the lining carrier has a length of between 600 mm and 4000 mm.

7. The sanding-shoe lining as claimed in claim 1, wherein the lining carrier has at least five webs.

8. The sanding-shoe lining as claimed in claim 1, wherein the lining carrier has at least one stop face for taking up transverse forces.

9. The sanding-shoe lining as claimed in claim 8, wherein the lining carrier has a swallowtail-shaped profile.

10. The sanding-shoe lining as claimed in claim 1, wherein the lining carrier has a width of between 60 mm and 1000 mm.

11. The sanding-shoe lining as claimed in claim 1, wherein the lining carrier contains or is composed of a non-metallic material.

12. The sanding-shoe lining as claimed in claim 11, wherein the non-metallic material contains or is composed of at least one of a wood material and a cotton material.

13. The sanding-shoe lining as claimed in claim 11, wherein the lining carrier contains or is composed of a composite material.

14. The sanding-shoe lining as claimed in claim 1, wherein the lining carrier has a side that faces toward the carrier device, when in use, and has a side that faces away from the carrier device when in use, and a number of webs and recesses is designed so as to be different in each case.

15. The sanding-shoe lining as claimed in claim 14, wherein the side that faces toward the carrier device has six webs.

16. The sanding-shoe lining as claimed in claim 14, wherein the side that faces toward the carrier device has five webs.

17. A sanding-shoe lining, comprising: a lining carrier for a sanding-shoe lining, wherein the lining carrier has at least one recess on a face of the lining carrier that is to face toward the carrier device for heat exchange with an external environment, and a sanding lining which comprises at least one of a cushion layer and a slide lining.

18. The sanding-shoe lining as claimed in claim 17, wherein the cushion layer contains or is composed of a foam or a felt.

19. The sanding-shoe lining as claimed in claim 17, wherein the slide lining contains or is composed of a graphite compound.

20. A sanding shoe for pressing a sanding face on to workpiece in a segment-belt and a wide-belt sanding machine, the sanding shoe comprising: a carrier device, a sanding-shoe lining, the sanding-shoe lining comprising a lining carrier and a sanding lining, the lining carrier producing a connection between the sanding-shoe lining and the carrier device, wherein the carrier device is designed to accommodate the sanding-shoe lining substantially with a precise fit, and there is at least one recess between the sanding-shoe lining and the carrier device for the purpose of heat exchange with an external environment.

21. The sanding shoe as claimed in claim 20, wherein the at least one recess is formed on or at a side of the sanding-shoe lining that faces toward the carrier device.

22. The sanding shoe as claimed in claim 20, wherein the at least one recess is provided on the carrier device for heat exchange with the environment.

Description

(1) The present invention is described more fully in the following with reference to exemplary embodiments and drawings, without being limited thereto.

(2) FIG. 1 shows a schematic drawing of a lining carrier according to the invention,

(3) FIG. 2 shows a schematic drawing of a sanding-shoe lining according to the invention,

(4) FIG. 3 shows a schematic drawing of a sanding-shoe lining according to the invention, which is clamped into a carrier device,

(5) FIG. 4 shows a schematic sectional representation of a belt sanding machine with a sanding shoe,

(6) FIG. 5 shows a schematic drawing of an intermediate product in the production of a lining carrier according to the invention,

(7) FIG. 6 shows a schematic drawing of a lining carrier according to the invention,

(8) FIG. 7a shows a schematic drawing of a particular embodiment of the lining carrier according to the invention,

(9) FIG. 7b shows a schematic drawing of a particular embodiment of the sanding-shoe lining according to the invention,

(10) FIG. 8a shows a schematic drawing of a further particular embodiment of the lining carrier according to the invention,

(11) FIG. 8b shows a schematic drawing of a further particular embodiment of the sanding-shoe lining according to the invention, and

(12) FIGS. 9a and 9b show schematic drawings of exemplary sanding shoe fitted with sanding-shoe linings according to FIGS. 7a and 7b.

(13) FIG. 10 shows a schematic drawing of an alternative embodiment of the present invention.

(14) FIG. 1 shows a schematic sectional representation of a lining carrier 1 having a plurality of webs and resultant grooves.

(15) The lining carrier 1 has a substantially swallowtail shape, which tapers toward the side 2 that faces toward the lining (not shown). On the side 2 that faces toward the lining, at the top in the schematic sectional representation of the profile, there are three webs 4a, 4b and 4c. The entire lining carrier has a substantially mirror-symmetrical structure in relation to a vertical symmetry axis. The webs 4a and 4c are located opposite each other on a notional symmetry axis, and are equal in size. By means of two grooves 5a and 5b, the web 4b divides the side of the lining carrier that faces toward the lining.

(16) The grooves 5a and 5b are continuous in the entire longitudinal axis of the lining carrier 1.

(17) On the side 3 that faces toward the carrier device (at the bottom in the profile view), there are five webs 6a, 6b, 6c, 6d and 6e. As a result, four grooves 7a, 7b, 7c and 7d of substantially the same shape are created on this side.

(18) FIG. 2 shows a schematic profile view of a second exemplary embodiment of a sanding-shoe lining 8. A lining 9 fastened to the lining carrier 1 is likewise shown schematically. The lining 9 is composed of felt or foam, which is interspersed over its thickness with a slide material, preferably with graphite or a graphite compound.

(19) FIG. 3 shows a schematic profile view of an exemplary embodiment of a sanding shoe 11 according to the invention. The lining carrier 1 and a carrier device 10 together form the sanding shoe 11. The design of the lining carrier profile in a swallowtail shape enables it to be inserted in a guide rail. This makes it easier to cover the sanding shoe 11. A lining 9 is also applied to the lining carrier. The lining 9 is composed of a cushion material of felt or foam. The felt or foam lining 9 has a thickness of 3 to 4 mm, preferably of 3 to 3.5 mm. The felt preferably has a volume weight of approximately 0.2 to 0.7 g/cm.sup.3. Felts and foams suitable for the embodiment according to the invention are obtainable, for example, under the designation wool felt, from VFG, in Gingen, Germany. Hot-melt, or PU adhesive, can foe used to fasten the felt 9 to the lining carrier 1. The carrier device 10 is composed of aluminum.

(20) FIG. 4 shows a schematic sectional representation, in profile, of a belt sanding machine 20 with a sanding shoe 11. A workplace 12 is conveyed on a sanding table 13 under a revolving sanding belt 14. The sanding belt 14 is driven in a running direction 16 by three drive rollers 15 and is pressed against the workpiece 12 by the sanding shoe 11.

(21) FIG. 5 shows an intermediate step in a method of producing a lining carrier 1 according to the invention. Following fabrication, the blank 21 is divided, in a cutting plane 30, into two lining carriers 1. The resulting lining carriers 1 have five webs on the side A that faces toward the carrier device. Four grooves are created as a result. The side B of the lining carrier 1 that faces toward the lining can also be sanded smooth, if necessary, before a lining is applied.

(22) A further particular embodiment of the lining carrier 1 according to the invention is shown in FIG. 6. In the profile view, the lining carrier has a width of 82.3 mm. The thickness is 4.7 mm. The lining carrier 1 has a symmetrical structure. The webs 6b, 6c and 6d are 7.6 mm 8.0 mm wide, and are 12.4 mm-12.8 mm apart in total. This results in two central grooves 7b and 7c, which are each 12.6 mm wide. The lining carrier is furthermore tapered in a swallowtail shape in relation to the side that faces toward the lining. Two further webs 6a and 6e are located at the tapering-out ends of the swallowtail-shaped boundary at the sides of the lining carrier 1. Two further grooves 7a and 7d, each, of 16.15 mm in width, are created as a result. The lining carrier 1 has a length of 685 mm.

(23) FIG. 7a shows a particular embodiment of the lining carrier 1 according to the invention. The lining carrier 1 has the previously described, substantially swallowtail shape at the ends 6a, 6f, with an angle of inclination of 30 in relation to the normal of the pressure face. On the top side (facing toward the lining), there are three webs 4a, 4b and 4c, such that two grooves 5a and 5b are formed. On the underside (facing toward the carrier device), there are six webs 6a, 6b, 6c, 6d, 6e and 6f, which, in turn, results in five grooves 7a, 7b, 7c, 7d and 7e. At the lateral ends 6a and of, the swallowtail graduates into a tapering-in and tapering-out bevel that, at the same time, forms the webs 4a and 4c. The grooves 7a and 7e created, by the webs of the swallowtail 6a and 6f and the webs 6b and 6d are disposed parallel to the tapering-in and tapering-out bevels 4a and 4b.

(24) The lining carrier 1 has a profile width of between 80 and 85 mm, and in particular between 82.2 and 82.4 mm. The web 4b is 54 mm wide, the webs 4a and 4c are each 11.15 mm. The lining carrier 1 is 4.6 mm-4.8 mm thick at the thickest location, and 2-3 mm, in particular 2.4-2.6 mm, at the thinnest locations. The lining carrier 1 has a length of between 2000 mm and 3500 mm, in particular 3420 mm-3440 mm.

(25) The grooves 5a, 5b have a width or 2.5 mm-3.5 mm, in particular 2.9 mm-3.1 mm.

(26) The swallowtail-shaped stop faces 6 enclose an angle of preferably 30 with the vertical (which is perpendicular to the pressure face).

(27) The tapering-in and tapering-out bevels 4a, 4c enclose an angle of 4-4.5, in particular 4.32, with the pressure face.

(28) FIG. 7b shows a sanding-shoe lining 8 with a lining carrier 1 as shown in FIG. 7a. A lining 9 has been applied to the lining carrier. The lining 9 is composed, of a cushion layer 40 and a slide layer 41. Synthetic needle felt has been used for the cushion layer 40. For soft cushions, PU foam can also be used.

(29) FIG. 8a shows a further particular embodiment of the lining carrier 1 according to the invention. The lining carrier has five webs 6a, 6b, 6c, 6d and 6e on the side that faces toward the carrier device, from which four grooves 7a, 7b, 7c and 7d are created. On the side that faces toward the workplace there are three webs 4a, 4b and 4c, and two grooves 5a and 5b result from these.

(30) FIG. 8b shows a further particular embodiment of a sanding-shoe lining 8 according to the lining carrier 1 from FIG. 8a.

(31) FIGS. 9a and 9b show sanding shoes II fitted with sanding-shoe linings 8 according to the invention. The sanding-shoe linings 8 are fixed to the carrier device 10 by means of the swallowtail-shaped profile sides.

(32) FIG. 10 shows an alternative embodiment of the present invention. A sanding shoe 11 has been fitted, with a conventional sanding-shoe lining 8, which, has no recesses or webs on the face that faces toward the carrier device 10. The carrier device, however, has the webs 6a, 6b, 6c and 6d. This results in the recesses 7a, 7b and 7c between the carrier device 10 and the sanding-shoe lining 8. The recesses 7a, 7b, 7c can extend as grooves 7a, 7b, 7c over the entire length of the sanding shoe 11. The webs 6a, 6b, 6c, 6d can be bonded on or can be part of the profile structure of the carrier device.

(33) Suitable materials for production of the lining carrier according to the invention are, in particular, MDF or HDF or chipboards or WPC (wood plastic composite).

(34) Above all, MDF panels (medium density fiber panels) having a density of 750 to 950 kg/m.sup.3 and a UF or MUF bonding are especially suitable. These panels are obtainable, as a standardized DIN 622 Part 5 type, from manufacturers such as Kronospan, Menznau, Switzerland, or Kaindl, Salzburg, Austria, under the designation standard MDF (e.g. Fluri). As lining carriers, MDF panels can preferably be used in a thickness from 3 to 6 mm. Thickness of 4.4 to 5 mm are especially suitable.

(35) WPC is a composite of wood fibers and thermoplastics. In the production of lining carriers according to the invention from WPC, wood fibers are dried and mixed with a high-density polyethylene (HDPE). When subjected to high temperatures, the HOPE plasticizes and completely encloses the wood fibers. A WPC granulate is produced. Mix ratios of 60:40 to 85:15 of natural fiber to thermoplastics have proved to be especially suitable.

(36) Extrusion is suitable for the production of lining carriers according to the invention from WPC. The granulate is fed into an extruder, melted and compressed. An opening for shaping the profiles according to the invention (see, for example, FIGS. 1, 6, 7 or) is used to extrude the lining carrier. The resultant lining carrier is cooled in a water cooling bath and cut into appropriate lengths, for example into lengths of 600 mm to 5000 mm.