Method for processing wires for producing a wire basket and wire basket, in particular washing or rinsing basket, or part thereof

Abstract

The invention relates to a method for processing wires (10) having a first end (11), a second end (12) and a longitudinal axis (A) for producing a wire basket, in particular a washing or rinsing basket, or a part thereof, comprising the following steps: - producing a first bevel (21) at a first angle (α1) relative to the longitudinal axis (A) of the wire (10) at least at a first end region (20) of the wire (10) adjacent to the first end (11), - producing a second bevel (22) at a second angle (α2), which is greater than the first angle (α1), relative to the longitudinal axis (A) of the wire (10) at the first end region (20), wherein the second bevel (22) is arranged closer to the first end (11) of the wire (10) than the first bevel (21).The invention further relates to a wire basket, in particular a washing or rinsing basket, or part of a wire basket, comprising a plurality of straight and / or bent wires (10), each wire (10) having a first end (11), a second end (12) and a longitudinal axis (A), at least at a first end region (20) of the wire (10) adjacent to the first end (11) having a first bevel (21) arranged at a first angle (α1) relative to the longitudinal axis (A) of the wire (10), and at least at a first end region (20) of the wire (10) adjacent to the first end (11) having a second bevel (22) arranged at a second angle (α2), which is greater than the first angle (α1), relative to the longitudinal axis (A) of the wire (10), the second bevel (22) being arranged closer to the first end (11) of the wire (10) than the first bevel (21).

Description

[0001] The invention relates to a method for processing wires to produce a wire basket and to a wire basket, in particular a washing or rinsing basket, particularly preferably a dishwasher basket, or a part thereof.

[0002] Wire baskets are well known, especially washing or rinsing baskets, which are used, for example, in dishwashers. These are typically made of wires that are sometimes bent and often only locally welded together to form a frame. The frame is then coated with a plastic, for example, in a sintering process. Figure 4 illustrates an end portion 51 of a wire 50 that has been cut essentially straight, so that an angle of approximately 90° exists between the end face and the side face of the wire 50. The end portion 51 is coated with a plastic coating 55, the thickness of which is reduced at the peripheral end edge.

[0003] Due to different thermal expansion coefficients of the wire on the one hand and the plastic coating on the other hand, the problem arises that the wire hits the plastic coating and therefore the plastic coating is damaged, particularly at the bluntly cut wire ends, in particular it tears, breaks or chips off, whereupon the wire basket begins to corrode at this point.

[0004] It is known to apply a force to the end face of the wire with a forming die to create a deformation that is intended to mitigate the sharp 90° angle between the side surface of the wire and the end face. However, such deformation results in a circumferential collar in the end area of the wire with a larger outer diameter than the outer diameter of the original wire. This collar, on the one hand, does not completely prevent the problem of cracking, breaking, or chipping of the plastic, and on the other hand, is visually undesirable.

[0005] The object of the invention is therefore to provide a method for processing wires for producing a wire basket and a wire basket, in particular a washing or rinsing basket, particularly preferably a dishwasher basket, or a part thereof, which can reduce the risk of corrosion in such wire baskets.

[0006] The object is achieved according to the invention by a method for processing wires to produce a wire basket having the features of patent claim 1 and a wire basket, in particular a washing or rinsing basket, particularly preferably a dishwasher basket, or a part thereof having the features of patent claim 9 or 12.

[0007] Advantageous embodiments and further developments are specified in the dependent patent claims.

[0008] The method according to the invention for processing wires having a first end, a second end and a longitudinal axis for producing a wire basket, in particular a washing or rinsing basket, or a part thereof comprises the following steps: Producing a first bevel at a first angle relative to the longitudinal axis of the wire at least at a first end region of a wire adjacent to the first end, producing a second bevel at a second angle, which is greater than the first angle, relative to the longitudinal axis of the wire at the first end region, wherein the second bevel is arranged closer to the first end of the wire than the first bevel.

[0009] In the following, a chamfer is to be understood as meaning both the lateral surface of a truncated cone and a curved surface similar to the lateral surface of a spherical layer.

[0010] The invention is based on the finding that the risk of damage to the plastic at the straight cut ends of the wires can be reduced if the ends of the wires are rounded. This is because the rounding makes it possible to apply the plastic coating with a more uniform layer thickness and thus avoids a weak point in the plastic coating, which can be present in a straight cut wire at the 90° angle between the side surface of the wire and the end surface of the wire. An ideal hemispherical shape is difficult to manufacture with wires as thin and short as those required for wire baskets. However, a hemispherical shape can be approximately reproduced if at least a first bevel is provided at a first angle and additionally a second bevel at a second angle. The production of such bevels is simple and cost-effective.The result is a wire with an approximately rounded end, which in particular does not increase the outer diameter of the wire.

[0011] Preferably, the method comprises the following additional step: Producing a third bevel at a third angle, which is greater than the second angle, relative to the longitudinal axis of the wire at the first end region, wherein the third bevel is arranged closer to the first end of the wire than the second bevel.

[0012] Such a manufacturing step can further improve the approximation to the hemispherical shape.

[0013] Preferably, four or more chamfers can also be provided to further improve the approximation to the hemispherical shape. The angle of the chamfer located closer to the first end is always greater than the angle of the chamfer located further from the first end.

[0014] It should be noted that the order in which the chamfers are produced is arbitrary. Thus, the first chamfer can be produced first, followed by the second chamfer, and then, if necessary, the third, fourth, or further chamfers. However, it is also possible, for example, to produce the chamfer that is closest to the first end first and the chamfer that is farthest from the first end last.

[0015] Depending on the wire's intended use in the wire basket, it may be sufficient to process only one end as described above. It is advantageous to process the other end of the wire as well. Preferably, both ends of the wire are processed identically.

[0016] The procedure may include the following additional steps: Producing a first bevel at a first angle relative to the longitudinal axis of the wire at a second end region of a wire adjacent to the second end, producing a second bevel at a second angle, which is greater than the first angle, relative to the longitudinal axis of the wire at the second end region, wherein the second bevel is arranged closer to the second end of the wire than the first bevel. The first angle at the second end region can have the same size as the first angle at the first end region. Furthermore, the second angle at the second end region can have the same size as the second angle at the first end region.

[0017] Furthermore, the method may include the following additional step: Producing a third bevel at a third angle, which is greater than the second angle, relative to the longitudinal axis of the wire at the second end region, wherein the third bevel is arranged closer to the second end of the wire than the second bevel. The third angle at the second end region is in particular the same size as the third angle at the first end region.

[0018] Preferably, four or more chamfers can also be provided at the second end of the wire to further improve the approximation to the hemispherical shape. The angle of the chamfer located closer to the first end is always greater than the angle of the chamfer located further away from the first end.

[0019] It should be noted that the order of production of the bevels is also arbitrary at the second end.

[0020] According to a particularly preferred embodiment of the invention, one of the bevels is produced by a material-removing process, in particular by rotating the wire around its longitudinal axis and grinding, in particular on a grinding belt or grinding wheel. In order to produce the bevel at the respective angle, the longitudinal axis of the wire and the surface of the grinding belt or grinding wheel are arranged at an angle to each other at the corresponding angle.

[0021] The creation of one of the chamfers can also be achieved by a machining process, for example, using a cutting blade such as a milling cutter, or by cold or hot forming. It is possible for the various chamfers to be created in different ways.

[0022] A preferred development of the invention provides for the first end region and / or the second end region to be brushed, in particular wire brushed. This allows edges or burrs to be further rounded, thereby further reducing the risk of cracking, chipping, or breaking of the plastic.

[0023] The first angle is preferably between 10° and 50°, preferably between 20° and 40°, particularly preferably approximately 30°. The second angle is advantageously between 50° and 80°, preferably between 55° and 65°, particularly preferably approximately 60°. It has been shown that this can already result in a good approximate rounding of the end region of the wire.

[0024] Advantageously, the wire is made of steel. Steel wire is inexpensive to produce and easy to weld.

[0025] To produce the wire basket, in particular the washing or rinsing basket, particularly preferably a dishwasher basket, or a part of such a wire basket, several wires processed in this way are welded together, possibly after a bending process, in particular at specific points, and then coated with plastic, preferably polyamide, polypropylene, polyethylene, or PVC, particularly preferably polyamide 11 or polyamide 12. This enables a simple and cost-effective manufacturing process.

[0026] In a wire basket according to the invention, in particular a washing or rinsing basket, particularly preferably a dishwasher basket, or part of a wire basket, in particular a washing or rinsing basket, particularly preferably a dishwasher basket, comprising a plurality of straight and / or bent wires, each wire having a first end, a second end and a longitudinal axis, a first bevel is arranged at a first angle relative to the longitudinal axis of the wire at least on a first end region of a wire adjacent to the first end, a second bevel being arranged at a second angle, which is greater than the first angle, relative to the longitudinal axis of the wire at the first end region, the second bevel being arranged closer to the first end of the wire than the first bevel.Such a design results in an approximately rounded end region, which can reduce the risk of tearing, chipping or breaking of a plastic layer to be applied thereon.

[0027] Preferably, a third bevel is arranged at the first end region at a third angle, which is greater than the second angle, relative to the longitudinal axis of the wire, wherein the third bevel is arranged closer to the first end of the wire than the second bevel. Such a configuration can further improve the approximation to a hemispherical shape. In principle, the provision of additional bevels to further improve the approximation to a spherical shape is conceivable.

[0028] A preferred embodiment of the invention provides that a first bevel is arranged at a first angle relative to the longitudinal axis of the wire on a second end region of a wire adjacent to the second end, and a second bevel is arranged at a second angle, which is greater than the first angle, relative to the longitudinal axis of the wire on the second end region, wherein the second bevel is arranged closer to the second end of the wire than the first bevel. Thus, the other end of the wire is also processed accordingly in order to reduce the risk of tearing, breaking, or chipping of the plastic at both ends.

[0029] Advantageously, a third chamfer is arranged at the second end region at a third angle, which is greater than the second angle, relative to the longitudinal axis of the wire, wherein the third chamfer is arranged closer to the second end of the wire than the second chamfer. Such a configuration can further improve the approximation to a hemispherical shape. In principle, the provision of additional chamfers to further improve the approximation to the hemispherical shape is conceivable.

[0030] The first angle is preferably between 10° and 50°, preferably between 20° and 40°, particularly preferably approximately 30°. Advantageously, the second angle is between 50° and 80°, preferably between 55° and 65°, particularly preferably approximately 60°. It has been shown that a good approximate rounding can be achieved with these angle dimensions.

[0031] In an alternative wire basket according to the invention, in particular a washing or rinsing basket, particularly preferably a dishwasher basket, or part of a wire basket, in particular a washing or rinsing basket, particularly preferably a dishwasher basket, comprising a plurality of straight and / or bent wires, each wire having a first end, a second end, a diameter, and a longitudinal axis, at least one first end region of the wire adjacent to the first end is hemispherical with a diameter that is at most as large as the diameter of the wire. Such a configuration also results in a rounded end region that, in particular, does not protrude radially beyond the diameter of the wire, thereby reducing the risk of tearing, chipping, or breaking of a plastic layer to be applied thereto.

[0032] Advantageously, the wires are bent if necessary, welded together at least at certain points, and coated with a plastic, preferably comprising a polyamide, polypropylene, polyethylene, or PVC, particularly preferably comprising polyamide 11 or polyamide 12. This makes it possible to provide a stable wire basket or parts for one.

[0033] Advantageously, the wire has a length of 40 mm to 1400 mm, preferably 40 mm to 700 mm, particularly preferably 40 mm to 150 mm. The wire preferably has a diameter of 2.5 mm to 10 mm, preferably 2.5 mm to 5 mm. Wires of this size result in stable wire baskets or parts thereof.

[0034] According to a preferred embodiment of the invention, the wire is made of steel. Steel wires are inexpensive to manufacture and easy to weld.

[0035] The invention is explained in detail with reference to the following figures. Fig. 1a schematic representation of a first end region of a wire after a first processing step, Fig. 1b schematic representation of the first end region of the wire according to Fig. 1a after a further processing step, Fig. 1c schematic representation of the first end region of the wire according to Fig. 1b after a further processing step, Fig. 2 in schematic representation a wire with a first end region according to Fig. 1b and a corresponding second end region. Fig. 3 shows a schematic representation of a first end region of a wire in an alternative embodiment, Fig. 4 shows a schematic representation of a first end region of a wire in an alternative embodiment, and Fig. 5 shows a schematic representation of a first end region of a wire according to the prior art.

[0036] The Figures 1a to 1c and 2illustrate a first embodiment of a wire 10 with a first end 11 and a second end 12 and a longitudinal axis A.

[0037] The wire 10 can have a length L of 40 mm to 1400 mm, preferably 40 mm to 700 mm, particularly preferably 40 mm to 150 mm. The wire 10 can have a diameter D of 2.5 mm to 10 mm, preferably 2.5 mm to 5 mm. The wire 10 is made of steel, for example.

[0038] Adjacent to the first end 11 is a first end region 20. In the first end region 20, the wire 10 has a first bevel 21 at a first angle α1 relative to the longitudinal axis A of the wire 10 and a second bevel 22 at a second angle α2, which is greater than the first angle α1, relative to the longitudinal axis A of the wire 10, wherein the second bevel 22 is arranged closer to the first end 11 of the wire 10 than the first bevel 21 (cf. Fig. 2 and 1c ).

[0039] The first angle α1 can be, for example, between 10° and 50°, preferably between 20° and 40°, particularly preferably approximately 30°. The second angle α2 can be, for example, between 50° and 80°, preferably between 55° and 65°, particularly preferably approximately 60°.

[0040] The remaining end face of the first end 11 may have a diameter which is approximately 50% or less, for example approximately 1 / 3, of the diameter D of the wire 10.

[0041] How Figure 3 As illustrated, a third bevel 23 can additionally be arranged at the first end region 20 at a third angle α3, which is greater than the second angle α2, relative to the longitudinal axis A of the wire 20, wherein the third bevel 23 is arranged closer to the first end 11 of the wire 10 than the second bevel 22.

[0042] At a second end region 30 of the wire 10 adjacent to the second end 12, a first bevel 31 can be arranged at a first angle b1 relative to the longitudinal axis A of the wire 10, wherein a second bevel 32 is arranged at a second angle b2, which is greater than the first angle b1, relative to the longitudinal axis A of the wire 10 at the second end region, wherein the second bevel is arranged closer to the second end of the wire than the first bevel (cf. Fig. 2). The first angle β1 of the first bevel 31 of the second end region 30 preferably corresponds to the first angle α1 of the first bevel 21 of the first end region 20. The second angle β2 of the second bevel 32 of the second end region 30 preferably corresponds to the second angle α2 of the second bevel 22 of the first end region 20. A third bevel can also be arranged on the second end region 30 at a third angle, which is greater than the second angle, relative to the longitudinal axis of the wire, wherein the third bevel is arranged closer to the second end of the wire than the second bevel (not shown). The third angle of the third bevel of the second end region 30 preferably corresponds to the third angle α3 of the third bevel 23 of the first end region 20.

[0043] Figure 4 shows an alternative embodiment of the first end region 20, which is hemispherical with a diameter which is at most as large as the diameter D of the wire 10.

[0044] A wire basket can hold several wires 10 according to Figure 2 , 3 or 4 which, if necessary, are bent, welded together at least at certain points, and coated with a plastic coating 40. The plastic coating 40 can be made, for example, of polyamide, polypropylene, polyethylene, or PVC, preferably of polyamide 11 or polyamide 12.

[0045] The previously described wire 10 can be produced as follows: In a first method step, the first bevel 21 is produced at the first angle α1 relative to the longitudinal axis A of the wire 10 at least at the first end region 20 of the wire 10 adjacent to the first end 11 (cf. Fig. 1a). The end face of the first end 11 remaining after this process step can have a diameter that is approximately 70% or less, for example approximately 2 / 3, of the diameter D of the wire 10. For this purpose, the wire 10 can be guided to a grinding wheel or a grinding belt in rotation about its longitudinal axis A at an angle α1. Advantageously, the second end region 30 is machined accordingly at the same time, and the first bevel 31 of the second end region 30 is produced.

[0046] Subsequently, the second chamfer 22 is produced at the second angle α2, which is greater than the first angle α1, relative to the longitudinal axis A of the wire 10 at the first end region 20, wherein the second chamfer 22 is arranged closer to the first end 11 of the wire 10 than the first chamfer 21 (cf. Fig. 1b). The end face of the first end 11 remaining after this process step can have a diameter that is approximately 50% or less, for example approximately 1 / 3, of the diameter D of the wire 10. Advantageously, in this processing step, the second end region 30 is also machined accordingly at the same time, and the second bevel 32 of the second end region 30 is produced.

[0047] Optionally, the third chamfer 23, 33, in particular at the first end region 20 and at the second end region 30 simultaneously, or further chamfers can be applied.

[0048] After producing the desired number of chamfers 21, 22, 23, 31, 32, the first end region 20 and the second end region 30 are brushed, in particular wire brushed.

[0049] Subsequently, several wires 10 processed in this way can be spot-welded together, optionally after a corresponding bending process, to form the wire basket or part of a wire basket. The resulting frame can then be coated with the plastic coating 40, for example, in a sintering process. List of reference symbols

[0050] 10Wire 11First end 12Second end 20First end region 21First bevel 22Second bevel 23Third bevel 30Second end region 31First bevel 32Second bevel 40Plastic coating 50Wire according to the state of the art 51End region 55Plastic coating α1First angle α2Second angle α3Third angle β1First angle β2Second angle ALongitudinal axis DDiameter LLength

Claims

1. A method for processing wires (10) with a first end (11), a second end (12) and a longitudinal axis (A) for producing a wire basket, in particular a washing or rinsing basket, or a part thereof, comprising the following steps: - producing a first bevel (21) at a first angle (α1) relative to the longitudinal axis (A) of the wire (10) at least at a first end region (20) of the wire (10) adjacent to the first end (11), - producing a second bevel (22) at a second angle (α2), which is greater than the first angle (α1), relative to the longitudinal axis (A) of the wire (10) at the first end region (20), wherein the second bevel (22) is arranged closer to the first end (11) of the wire (10) than the first bevel (21).

2. Method according to one of the preceding claims, characterized bythe following additional step: - producing a third bevel (23) at a third angle (α3), which is greater than the second angle (α2), relative to the longitudinal axis (A) of the wire (10) at the first end region (20), wherein the third bevel (23) is arranged closer to the first end (11) of the wire (10) than the second bevel (22).

3. Method according to one of the preceding claims, characterized bythe following additional steps: - producing a first bevel (31) at a first angle (β1) relative to the longitudinal axis (A) of the wire (10) at a second end region (30) of the wire (10) adjacent to the second end (12), - producing a second bevel (32) at a second angle (β2), which is greater than the first angle (β1), relative to the longitudinal axis (A) of the wire (10) at the second end region (30), wherein the second bevel (32) is arranged closer to the second end (12) of the wire (10) than the first bevel (31), and preferably - producing a third bevel at a third angle, which is greater than the second angle, relative to the longitudinal axis of the wire at the second end region, wherein the third bevel is arranged closer to the second end of the wire than the second bevel.

4. Method according to one of the preceding claims, characterized in thatthe production of one of the bevels (21, 22, 23, 31, 32) is carried out by rotating the wire (10) about its longitudinal axis (A) and grinding, in particular on a grinding belt or a grinding wheel, or by a machining process, for example by means of a machining blade, or by cold or hot forming.

5. Method according to one of the preceding claims, characterized in that the first end region (20) and / or the second end region (30) is brushed, in particular wire brushed.

6. Method according to one of the preceding claims, characterized in that the first angle (α1, β1) is between 10° and 50°, preferably between 20° and 40°, particularly preferably about 30°, and / or that the second angle (α2, β2) is between 50° and 80°, preferably between 55° and 65°, particularly preferably about 60°.

7. Method according to one of the preceding claims, characterized in that the wire (10) is made of steel.

8. Method according to one of the preceding claims, characterized in that several wires (10) processed in this way are welded together at least at certain points and then coated with a plastic coating (40), preferably comprising a polyamide, polypropylene, polyethylene or PVC, particularly preferably comprising polyamide 11 or polyamide 12.

9. A wire basket, in particular a washing or rinsing basket, particularly preferably a dishwashing basket, or part of a wire basket, in particular a washing or rinsing basket, particularly preferably a dishwashing basket, comprising a plurality of straight and / or bent wires (10), each wire (10) having a first end (11), a second end (12), and a longitudinal axis (A), wherein at least at a first end region (20) of the wire (10) adjacent to the first end (11), a first bevel (21) is arranged at a first angle (α1) relative to the longitudinal axis (A) of the wire (10), and wherein a second bevel (22) is arranged at a second angle (α2), which is greater than the first angle (α1), relative to the longitudinal axis (A) of the wire (10) at the first end region (20), wherein the second bevel (22) is arranged closer to the first end (11) of the wire (10) than the first bevel (21), wherein preferably at the first end region (20) a third chamfer (23) at a third angle (α3),which is greater than the second angle (α2), is arranged relative to the longitudinal axis (A) of the wire (10), wherein the third bevel (23) is arranged closer to the first end (11) of the wire (10) than the second bevel (22)., 10. Wire basket according to claim 9, characterized in thata first bevel (31) is arranged at a first angle (β1) relative to the longitudinal axis (A) of the wire (10) on a second end region (30) of the wire (10) adjacent to the second end (12), and a second bevel (32) is arranged at a second angle (β2), which is greater than the first angle (β1), relative to the longitudinal axis (A) of the wire (10) on the second end region (30), the second bevel (32) being arranged closer to the second end (12) of the wire (10) than the first bevel (31), preferably a third bevel is arranged at a third angle, which is greater than the second angle, relative to the longitudinal axis (A) of the wire (10) on the second end region (30), the third bevel being arranged closer to the second end (12) of the wire (10) than the second bevel (32).

11. Wire basket according to one of claims 9 to 10, characterized in thatthe first angle (α1, β1) is between 10° and 50°, preferably between 20° and 40°, particularly preferably about 30°, and / or that the second angle (α2, β2) is between 50° and 80°, preferably between 55° and 65°, particularly preferably about 60°.

12. Wire basket, in particular a washing or rinsing basket, particularly preferably a dishwasher basket, or part of a wire basket, in particular a washing or rinsing basket, particularly preferably a dishwasher basket, comprising a plurality of straight and / or bent wires (10), each wire (10) having a first end (11), a second end (12), a diameter (D) and a longitudinal axis (A), at least one first end region (20) of the wire (10) adjacent to the first end (11) being hemispherical with a diameter which is at most as large as the diameter (D) of the wire (10).

13. Wire basket according to one of claims 9 to 12, characterized in thatthe wires (10) are bent if necessary, welded together at least at certain points and coated with a plastic coating (40), preferably comprising a polyamide, polypropylene, polyethylene or PVC, particularly preferably comprising polyamide 11 or polyamide 12.

14. Wire basket according to one of claims 9 to 13, characterized in that the wire (10) has a length (L) of 40 mm to 1400 mm, preferably 40 mm to 700 mm, particularly preferably 40 mm to 150 mm and / or that the wire (10) has a diameter (D) of 2.5 mm to 10 mm, preferably 2.5 mm to 5 mm.

15. Wire basket according to one of claims 9 to 14, characterized in that the wire (10) is made of steel.

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