Grinding and / or polishing pad device, grinding and / or polishing machine and method for manufacturing a grinding and / or polishing pad device

Abstract

The invention relates to a grinding and / or polishing pad device (10a; 10b) for a grinding and / or polishing machine (12a), with a carrier unit (14a; 14b). It is proposed that the carrier unit (14a; 14b) shall have at least one air duct (18a; 18b, 76b), in particular an exhaust air duct, extending transversely with respect to a principal normal (16a; 16b) of the carrier unit (14a; 14b).

Description

State of the art

[0001] A grinding and / or polishing pad device for a grinding and / or polishing machine, with a carrier unit, has already been proposed. Disclosure of the invention

[0002] The invention relates to a grinding and / or polishing pad device for a grinding and / or polishing machine, with a carrier unit.

[0003] It is proposed that the carrier unit has at least one air duct, in particular an extraction air duct, running transversely with respect to a principal normal of the carrier unit on the machine side.

[0004] This design enables a particularly advantageous construction of a grinding and / or polishing pad device. It allows for exceptionally high assembly precision of the grinding and / or polishing pad device, combined with particularly good suction properties. The design of the air channel in the carrier unit enables particularly precise attachment, especially simple and / or precise foaming, of further units and / or elements of the grinding and / or polishing pad device, preferably a pad unit. This results in a particularly precisely designed and / or precisely operable grinding and / or polishing pad device. It also allows for a particularly simple and / or robust construction of the grinding and / or polishing pad device.

[0005] The grinding and / or polishing pad device is, in particular, at least a part of a grinding and / or polishing pad. It is also conceivable that the grinding and / or polishing pad device comprises the entire polishing pad. The grinding and / or polishing pad device preferably includes a drive interface unit. The drive interface unit is, in particular, intended for connecting the carrier unit to the grinding and / or polishing machine. It is conceivable that the drive interface unit is formed integrally with the carrier unit or separately from the carrier unit. The phrase "at least one unit and at least one further unit are formed at least partially integrally" is to be understood, in particular, as meaning that at least one element of the unit is formed integrally with at least one further element of the further unit.The term "one-piece" can be understood to mean at least materially bonded, for example by a welding process, a soldering process, an adhesive bonding process, an injection molding process, and / or another process that would appear appropriate to a person skilled in the art, and / or advantageously formed in one piece, such as by manufacturing from a single casting and / or by manufacturing using a single- or multi-component injection molding process, and advantageously from a single blank. Alternatively, it is conceivable that the drive interface unit can be detachably attached to the carrier unit, for example by means of screws, rivets, or the like.

[0006] The support unit is specifically designed to stiffen and / or stabilize the grinding and / or polishing pad. The support unit is preferably designed to carry the drive interface unit. The support unit is preferably designed as a carrier for a pad unit, particularly the one mentioned above, and / or an abrasive interface. "Designed" is understood to mean specially configured, specially designed, and / or specially equipped. The fact that an object is designed for a specific function is understood to mean that the object fulfills and / or performs this specific function in at least one application and / or operating condition. The support unit is preferably a single piece. The support unit is preferably made at least partially of plastic, preferably polyamide, for example, PA6-GF30.

[0007] The abrasive interface preferably has an abrasive contact surface for an abrasive and / or polishing compound, in particular for a polishing sponge. The abrasive contact surface is preferably circular. Alternatively, it is conceivable that the abrasive contact surface is triangular, rectangular, or square, or has another shape that would appear useful to a person skilled in the art. The abrasive interface particularly includes an abrasive fastening unit for attaching the abrasive or polishing compound, in particular the polishing sponge, to the abrasive interface. For example, the abrasive fastening unit has a hook-and-loop surface, an adhesive surface, a combination of these, or the like for attaching the abrasive and / or polishing compound, in particular the polishing sponge.The abrasive fastening unit, in particular the hook and loop surface and / or the adhesive surface, preferably forms at least part of the abrasive contact surface.

[0008] The abrasive interface, in particular the abrasive contact surface of the abrasive interface, preferably has a plurality of air passage openings. The air passage openings of the abrasive interface are at least partially designed as extraction openings and / or at least partially as exhaust openings. The air passage openings of the abrasive interface have at least partially different shapes and / or sizes. Alternatively, however, it is also conceivable that the air passage openings of the abrasive interface have the same shapes and / or sizes. The abrasive or polishing compound preferably has air passage openings corresponding to the extraction openings of the abrasive interface. The air passage openings of the abrasive interface are fluidically connected to the at least one air channel.It is conceivable that several air passage openings of the abrasive interface are fluidically connected to the air duct, for example, two, three, four, or more than four. Additionally, it is conceivable that the abrasive interface has at least one air passage opening that is free from any connection to the at least one transversely running air duct.

[0009] The carrier unit preferably has air passage openings corresponding to the air passage openings of the abrasive interface, in particular arranged on the machining side. "Machining side" is understood to mean, in particular, the abrasive side or the abrasive interface side.

[0010] The abrasive is preferably designed as sandpaper. The abrasive preferably has, in particular, a fastening unit corresponding to the abrasive fastening unit for attachment to the sanding and / or polishing pad, preferably at the abrasive interface, for example, a hook and loop surface and / or an adhesive surface or the like. The polishing medium is preferably designed as polishing paper. The polishing medium preferably has, in particular, a fastening unit corresponding to the abrasive fastening unit for attachment to the sanding and / or polishing pad, preferably at the abrasive interface, for example, a hook and loop surface and / or an adhesive surface or the like. It is conceivable that the abrasive interface is part of the sanding and / or polishing pad assembly.

[0011] The term "machine-side" here refers specifically to a side of an object that faces the grinding and / or polishing machine in a state where the grinding and / or polishing pad device is arranged on the grinding and / or polishing machine. A machine-side of the carrier unit preferably faces away from an abrasive side of the carrier unit. The abrasive side is preferably a side of the carrier unit facing the abrasive interface in a state where the abrasive interface is arranged on the carrier unit.

[0012] The support unit preferably has a principal extension plane. A "principal extension plane" of a component or element can be understood as a plane that is parallel to a major face of the smallest possible imaginary cuboid that just completely encloses the component, and in particular passes through the center of the cuboid. The principal normal preferably runs at least substantially perpendicular to the principal extension plane of the support unit. "Substantially perpendicular" can be understood as an orientation of a direction relative to a reference direction, wherein the direction and the reference direction, particularly when viewed in a projection plane, form an angle of 90° and the angle has a maximum deviation of, in particular, less than 8°, advantageously less than 5°, and most advantageously less than 2°.

[0013] The principal normal preferably runs at least substantially parallel to a drive axis of the drive interface unit; more preferably, the principal normal corresponds to the drive axis. Preferably, the drive interface unit and / or the carrier unit, more preferably the grinding and / or polishing pad device, in a state connected to the grinding and / or polishing machine, can be driven to rotate about the drive axis and / or can be driven such that the drive axis performs an eccentric movement. "Substantially parallel" here can be understood as an alignment of a direction relative to a reference direction, particularly in a plane, wherein the direction has a deviation from the reference direction of, in particular, less than 8°, advantageously less than 5°, and most advantageously less than 2°.

[0014] The grinding and / or polishing machine preferably has a drive unit, for example an electric motor, a pneumatic drive, or the like, for driving the grinding and / or polishing pad, in particular the grinding and / or polishing pad assembly, in a state connected to the grinding and / or polishing machine. It is conceivable that the grinding and / or polishing machine is designed as an eccentric sander, a rotary sander, an orbital sander, or the like. Preferably, the grinding and / or polishing machine is cordless, in particular as a battery-powered grinding and / or polishing machine. Alternatively, it is conceivable that the grinding and / or polishing machine is designed as a corded or pneumatic grinding and / or polishing machine.

[0015] The term "transverse" is to be understood in particular as different from "parallel". Preferably, the air duct runs at least substantially perpendicular to the principal normal of the support unit. Preferably, the air duct runs at least substantially parallel to the principal plane of extension of the support unit.

[0016] The grinding and / or polishing pad device is specifically designed for dust extraction. "Designed" here refers specifically to being specially programmed, designed, and / or equipped. The fact that an object is designed for a specific function means, in particular, that the object fulfills and / or performs this specific function in at least one application and / or operating condition. The air duct is preferably designed as an extraction air duct. The air duct is preferably designed to guide grinding and / or polishing dust.

[0017] Preferably, the grinding and / or polishing machine has an extraction fan for extracting grinding and / or polishing dust, which is generated in particular by processing a workpiece with the grinding and / or polishing machine, preferably via the at least one air duct. Alternatively, it is conceivable that the air duct is designed as an intake air duct for supplying fresh air to the abrasive interface, in particular via the air passage openings of the abrasive interface designed as outlet openings. It is conceivable that an airflow for drawing in fresh air via the air duct can be generated by the extraction fan.

[0018] It is further proposed that the air duct run at least substantially radially with respect to the principal normal. This can advantageously enable particularly effective and / or efficient extraction of grinding and / or polishing dust. In particular, the air duct runs radially outwards with respect to the principal normal, at least in sections. It is also conceivable that the air duct has a curved path in sections, for example, a winding path, when viewed from the principal normal. However, it is also conceivable that the air duct has a straight path over its entire longitudinal extent.

[0019] Furthermore, it is proposed that the grinding and / or polishing pad device includes a cover unit, which is arranged on the machine side of the carrier unit and at least partially restricts and / or closes the air duct, particularly on the machine side. Advantageously, a particularly simple grinding and / or polishing pad device can be provided, while simultaneously offering particularly good extraction properties. Preferably, the cover unit is formed integrally with the carrier unit; more preferably, the cover unit is bonded to the carrier unit. Alternatively, it is also conceivable that the cover unit is detachably attached to the carrier unit. In this context, "detachable" is understood to mean, in particular, "non-destructively separable." The cover unit is preferably designed to at least partially restrict the air duct on the machine side.A principal plane of extension of the cover unit runs, in particular, at least substantially parallel to the principal plane of extension of the support unit. The cover unit is preferably disc-shaped and preferably made of a plastic, such as PVC, POM, PA, or the like. The cover unit can also be made of a composite material, for example, a mixture of epoxy resin and fiberglass fabric or the like.

[0020] Furthermore, it is proposed that the cover unit has at least one recess which defines an air passage opening for the air duct on the machine side, in particular with an opening cross-section that runs at least substantially parallel to a main plane of extension of the carrier unit. Advantageously, a particularly easy-to-manufacture grinding and / or polishing pad device can be provided, while simultaneously offering particularly good extraction properties. The main plane of extension of the carrier unit preferably runs at least substantially parallel to a main plane of extension of the abrasive interface. It is conceivable that the air passage opening of the cover unit is designed as an extraction opening for removing grinding and / or polishing dust or as an intake opening for supplying fresh air to the abrasive interface.

[0021] Furthermore, it is proposed that the support unit, on the machining side, has at least one ribbed structural element extending at least substantially radially, and in particular radially straight, with respect to the principal normals. Advantageously, a particularly high stiffness of the support unit can be achieved. A particularly durable and, in particular, precisely joinable grinding and / or polishing pad device can be realized. "Machining side" is understood to refer specifically to the abrasive side or the abrasive interface side.

[0022] A machining side of the carrier unit preferably corresponds to the abrasive side of the carrier unit. The machining side or the abrasive side of the carrier unit particularly corresponds to a side of the carrier unit on which the abrasive interface, especially the abrasive or the polishing medium, is arranged in an operating state. The carrier unit preferably has a carrier base body. The rib structure element is preferably formed integrally with the carrier base body; more preferably, the carrier base body incorporates the rib structure element. The rib structure element is designed as a wall. Preferably, the carrier unit has a plurality of radially extending, preferably radially straight, rib structure elements on the machining side.

[0023] Furthermore, it is proposed that the ribbed structural element forms a side wall of the air duct, and in particular, preferably, that the previously mentioned ribbed structural elements form the side walls of all air ducts. Advantageously, a particularly high rigidity of the support unit can be achieved in a particularly space-saving manner. A particularly durable and, in particular, precisely joinable grinding and / or polishing pad device can be realized. Preferably, two ribbed structural elements each form side walls of one of the air ducts.

[0024] Furthermore, it is proposed that the ribbed structural element on a machining side of the carrier unit project beyond the air duct in a direction parallel to the main normal of the carrier unit. Advantageously, the polishing unit can be attached to the carrier unit particularly securely, especially by foaming. A particularly reliable grinding and / or polishing pad device can be provided.

[0025] Furthermore, it is proposed that the grinding and / or polishing pad device includes a padding unit, in particular the one mentioned previously, which is foamed onto the carrier unit on the machining side. Advantageously, a particularly precisely assembled grinding and / or polishing pad device can be provided. Particularly high working precision can be achieved. Advantageously, a particularly good user experience can be attained. The padding unit is preferably made of foam. The abrasive mounting unit is arranged, in particular, on the padding unit. The abrasive mounting unit and the carrier unit are preferably arranged on opposite sides of the padding unit; in particular, the padding unit is arranged between the carrier unit and the abrasive mounting unit.Preferably, at least one rib structure element, and in particular at least one portion of the rib structure element projecting beyond the air duct, is encased in foam by the upholstery unit. The rib structure element is designed, in particular, for power transmission, especially torque transmission, from the carrier unit to the upholstery unit. Preferably, the at least one air duct is encased in foam by the upholstery unit on the machining side. The upholstery unit preferably has air passage openings corresponding to the air passage openings of the drive interface unit and / or the air passage openings of the carrier unit.

[0026] Furthermore, it is proposed that the grinding and / or polishing pad device has a sprocket-like drive interface unit, in particular the one mentioned above, wherein the support unit has an air passage opening connected to the air duct, in particular the one mentioned above, which is arranged between two adjacent teeth of the sprocket-like drive interface unit. This allows for particularly high rigidity of the grinding and / or polishing pad device while simultaneously providing particularly good extraction properties. The drive interface unit has, in particular, a machine connection contour for connection to an output element of the grinding and / or polishing machine. The drive interface unit preferably has a plurality of teeth, in particular uniformly arranged, on an outer circumference.The drive interface unit is designed to be rotationally symmetrical, preferably with respect to the drive axis. Preferably, an air passage opening of the carrier unit is arranged between each pair of teeth of the drive interface unit. The machine connection contour preferably surrounds the drive axis. It is conceivable that at least some of the air passage openings of the carrier unit are not arranged between teeth of the drive interface unit.

[0027] Furthermore, it is proposed that the grinding and / or polishing pad device includes a pad unit arranged on the carrier unit, in particular the previously mentioned one, whose end face has recesses spaced apart along a circumferential direction, in particular recesses other than openings. Advantageously, the recesses allow for varying stiffness in the pad unit. Advantageously, the varying stiffness of the pad unit in a given operating state can generate pulsation when machining a workpiece. Advantageously, particularly effective material removal from the workpiece can be achieved. Advantageously, a particularly effective grinding and / or polishing pad device can be provided. The recesses on the end face are arranged uniformly, in particular in the circumferential direction.The recesses are preferably spaced apart from each other in the circumferential direction. Each recess has a varying maximum depth when viewed in the circumferential direction. The maximum depth is preferably measured radially with respect to the principal normal. Alternatively, it is also conceivable that each recess has a constant depth when viewed in the circumferential direction.

[0028] Furthermore, it is proposed that a depression area defined by the depressions extends along the circumferential direction over at least 10%, preferably at least 50%, preferably at least 75% of the maximum circumferential extent of the end face. Advantageously, a continuous and / or uniform pulsation can be achieved. Advantageously, improved material removal efficiency can be implemented in a particularly precise manner.

[0029] Furthermore, a grinding and / or polishing machine, in particular the one already mentioned, is proposed, equipped with the grinding and / or polishing pad device according to the invention. Such a design enables a particularly advantageous construction of a grinding and / or polishing machine. A particularly high degree of assembly precision can be achieved for the grinding and / or polishing machine, combined with particularly good extraction properties. A grinding and / or polishing pad machine with a particularly precise design and / or precise operation can be provided.

[0030] Furthermore, a method for manufacturing a grinding and / or polishing pad device, in particular one according to the invention, is proposed, wherein in a process step, in particular an injection molding process step, an air channel extending transversely to a main normal of a carrier unit, in particular the aforementioned one, is created in the carrier unit, in particular by foaming a pad unit, in particular the aforementioned one, onto the carrier unit in a processing step, and in particular by forming a rib structure element of the carrier unit, in particular the aforementioned one, a side wall of the air channel, and / or by integrating a drive interface unit, in particular the aforementioned one, at least partially into the carrier unit.Such a method enables the provision of a grinding and / or polishing pad device with a particularly advantageous design, especially one with exceptionally high assembly precision and simultaneously excellent extraction properties. The design of the air channel in the carrier unit allows for particularly precise attachment, and in particular, simple and / or precise foaming, of further units and / or elements of the grinding and / or polishing pad device, preferably a pad unit. A grinding and / or polishing pad device with a particularly precise design and / or precise operation can be provided. In particular, the abrasive interface and the drive interface unit are placed in an injection mold, especially with a sleeve and a disc spring, whereby the pad unit is created by injecting foam into the injection mold.It is conceivable that the sleeve and / or the disc spring are part of the grinding and / or polishing pad, in particular the grinding and / or polishing pad assembly. The disc spring is preferably designed to create an axial preload on a screw connection when mounted on the grinding and / or polishing machine. Advantageously, the disc spring can be used to create a particularly secure fixation against the grinding and / or polishing pad coming loose from the grinding and / or polishing machine. The sleeve is preferably designed to integrate the disc spring into the grinding and / or polishing pad, in particular the grinding and / or polishing pad assembly. The air passage openings in the pad unit are preferably created in a single process step, in particular in a stamping process.

[0031] The grinding and / or polishing pad device, the grinding and / or polishing machine, and / or the method according to the invention are not / should not be limited to the application and embodiment described above. In particular, the grinding and / or polishing pad device, the grinding and / or polishing machine, and / or the method according to the invention may, to achieve a functionality described herein, have a different number of individual elements, components, units, and process steps than specified herein. Furthermore, values ​​within the specified limits of the value ranges stated in this disclosure shall also be considered disclosed and freely applicable. drawing

[0032] Further advantages arise from the following drawing description. The drawing illustrates three exemplary embodiments. The drawing, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and combine them into meaningful further combinations.

[0033] They show: Fig. 1 a grinding and / or polishing machine with a grinding and / or polishing pad in a side view, Fig. 2 the sanding and / or polishing pad made of Fig. 1 in a perspective view, Fig. 3 the sanding and / or polishing pad Fig. 1 in an exploded view, Fig. 4 the sanding and / or polishing pad Fig. 1 in a lateral cross-sectional view, Fig. 5 a carrier unit of the grinding and / or polishing pad in a perspective view of a top side of the carrier unit, Fig. 6 the carrier unit from Fig. 5 in a perspective view on a bottom side of the carrier unit, Fig. 7. A top view of the grinding and / or polishing pad without a cover unit, Fig. 8 a top view of the grinding and / or polishing pad without the cover unit with a dashed part of a drive interface unit which is integrated into the carrier unit, Fig. 9 a top view of an abrasive interface of the grinding and / or polishing pad, Fig. 10 a schematic diagram of a process for manufacturing a grinding and / or polishing pad device, Fig. 11 a top view of a grinding and / or polishing pad in a first alternative embodiment, Fig. 12 a top view of the grinding and / or polishing pad made of Fig. 11 with air ducts shown in dashed lines, Fig. 13 a perspective view of part of the grinding and / or polishing pad from the Fig. 11 and Fig. 12, Fig. 14 a top view of a grinding and / or polishing pad in a second alternative embodiment and Fig. 15 a lateral cross-sectional view of the grinding and / or polishing pad made of Fig. 14. Description of the exemplary implementations

[0034] Fig. Figure 1 shows a grinding and / or polishing machine 12a with a grinding and / or polishing pad device 10a. The grinding and / or polishing pad device 10a corresponds to a grinding and / or polishing pad 48a. Alternatively, it is conceivable that the grinding and / or polishing pad device 10a is only a part of a grinding and / or polishing pad 48a, for example, comprising only a drive interface unit 36a or the like.

[0035] In Fig. Figure 2 shows the grinding and / or polishing pad 48a, in particular the grinding and / or polishing pad assembly 10a. The grinding and / or polishing pad assembly 10a has a support unit 14a. The support unit 14a is designed to stiffen and / or stabilize the grinding and / or polishing pad 48a. The support unit 14a is formed in one piece. The support unit 14a is made at least partially of plastic, preferably of polyamide, for example PA6-GF30.

[0036] The grinding and / or polishing pad device 10a has a sprocket-like drive interface unit 36a (see also Fig. 8) The drive interface unit 36a is designed to connect the carrier unit 14a to the grinding and / or polishing machine 12a. The drive interface unit 36a is formed integrally with the carrier unit 14a. The phrase "at least one unit and at least one further unit are formed integrally with each other, at least partially" means, in particular, that at least one element of the unit is formed integrally with at least one further element of the further unit.The term "one-piece" can be understood to mean at least materially bonded, for example by a welding process, a soldering process, an adhesive bonding process, an injection molding process and / or another process that appears sensible to the person skilled in the art, and / or advantageously formed in one piece, such as by production from a single casting and / or by production in a single or multi-component injection molding process and advantageously from a single blank.

[0037] The drive interface unit 36a is at least partially integrated into the carrier unit 14a, in particular at least partially overmolded by the carrier unit 14a. Alternatively, it is conceivable that the drive interface unit 36a can be detachably attached to the carrier unit 14a, for example by means of screws, rivets, or the like. The carrier unit 14a is designed to support the drive interface unit 36a. The carrier unit 14a is preferably designed as a support for a cushion unit 34a and / or an abrasive interface 80a. The drive interface unit 36a is preferably designed as a sintered component, a stamped component, or a deep-drawn component. However, it is also conceivable that the drive interface unit 36a is designed as a die-cast component or a forged component.

[0038] The grinding and / or polishing pad 48a, in particular the grinding and / or polishing pad device 10a, has the abrasive interface 80a. The abrasive interface 80a has an abrasive contact surface 88a for an abrasive and / or polishing compound (see Figure 10a). Fig. 9) The abrasive contact surface 88a is circular. Alternatively, the abrasive contact surface 88a could be triangular, rectangular, or square, or have another shape that would be considered useful by a person skilled in the art. The abrasive interface 80a includes, in particular, an abrasive fastening unit 90a for fastening the abrasive or polishing compound to the abrasive interface 80a. For example, the abrasive fastening unit 90a includes a hook-and-loop fastener, an adhesive surface, a combination thereof, or the like for fastening the abrasive and / or polishing compound. The abrasive fastening unit 90a, in particular the hook-and-loop fastener and / or the adhesive surface, forms at least part of the abrasive contact surface 88a.

[0039] The abrasive interface 80a, in particular the abrasive contact surface 88a of the abrasive interface 80a, has a plurality of air passage openings, in particular extraction openings 92a, (in Fig. (9 is only one of the extraction openings 92a designated with a reference numeral). The extraction openings 92a have at least partially different shapes and / or sizes. Alternatively, however, it is also conceivable that the extraction openings 92a have the same shapes and / or sizes. The abrasive or polishing compound preferably has extraction openings corresponding to the extraction openings 92a of the abrasive interface 80a.

[0040] The abrasive is, for example, designed as sandpaper. The abrasive preferably has, in particular, a fastening unit corresponding to the abrasive fastening unit 90a for attachment to the sanding and / or polishing pad 48a, preferably the abrasive interface 80a, for example, a hook and loop surface and / or an adhesive surface or the like. The polishing medium is, for example, designed as polishing paper, as a polishing sponge with polishing agents, or the like. The polishing medium preferably has, in particular, a fastening unit corresponding to the abrasive fastening unit 90a for attachment to the sanding and / or polishing pad 48a, preferably the abrasive interface 80a, for example, a hook and loop surface and / or an adhesive surface or the like.

[0041] The carrier unit 14a has at least several air channels 18a extending transversely with respect to a principal normal 16a of the carrier unit 14a. "Transverse" is understood to mean, in particular, different from parallel. The air passage openings of the abrasive interface 80a are fluidically connected to the air channels 18a. It is conceivable that several air passage openings of the abrasive interface 80a are fluidically connected to one of the air channels 18a, for example, two, three, four, or more than four. Additionally, it is conceivable that the abrasive interface 80a has at least one air passage opening that is free from any connection to the transversely extending air channels 18a.

[0042] The term "machine-side" here refers in particular to a side of an object that faces the grinding and / or polishing machine 12a in a state of the grinding and / or polishing pad device 10a, in particular the grinding and / or polishing pad 48a, arranged on the grinding and / or polishing machine 12a. A machine side 94a of the carrier unit 14a faces away from an abrasive side 96a of the carrier unit 14a. The abrasive side 96a is a side of the carrier unit 14a facing the abrasive interface 80a in a state of the abrasive interface 80a arranged on the carrier unit 14a.

[0043] The support unit 14a has a principal extension plane 26a. A "principal extension plane" of a structural unit or element can be understood as a plane that is parallel to a major face of the smallest possible imaginary cuboid that just completely encloses the structural unit, and in particular passes through the center of the cuboid. The principal normal 16a is at least substantially perpendicular to the principal extension plane 26a of the support unit 14a. "Substantially perpendicular" can be understood as an orientation of a direction relative to a reference direction, wherein the direction and the reference direction, particularly when viewed in a projection plane, form an angle of 90° and the angle has a maximum deviation of, in particular, less than 8°, advantageously less than 5°, and most advantageously less than 2°.

[0044] The principal normal 16a runs at least substantially parallel to a drive axis 98a of the drive interface unit 36a; particularly preferably, the principal normal 16a corresponds to the drive axis 98a. The air channels 18a run at least substantially perpendicular to the principal normal 16a of the carrier unit 14a. The air channels 18a run at least substantially parallel to the principal extension plane 26a of the carrier unit 14a.

[0045] The drive interface unit 36a and / or the carrier unit 14a, preferably the grinding and / or polishing pad device 10a, can be driven to rotate about the drive axis 98a in a state connected to the grinding and / or polishing machine 12a and / or can be driven such that the drive axis 98a performs an eccentric movement. It is also conceivable that, in an embodiment of the grinding and / or polishing machine 12a as an orbital or rotary sander, the grinding and / or polishing pad device 10a only performs an orbital or circular movement without rotation, as, for example, in an embodiment with a rectangular or square base shape of the grinding and / or polishing pad device 10a.The term "essentially parallel" here can be understood as an alignment of a direction relative to a reference direction, in particular in a plane, wherein the direction has a deviation from the reference direction of particularly less than 8°, advantageously less than 5° and most advantageously less than 2°.

[0046] The grinding and / or polishing pad 48a, in particular the grinding and / or polishing pad device 10a, is equipped for dust extraction. "Equipped" is understood to mean specifically programmed, designed, and / or equipped. The fact that an object is equipped for a specific function is understood to mean, in particular, that the object fulfills and / or performs this specific function in at least one application and / or operating state. The air ducts 18a are designed as extraction air ducts.

[0047] The air channels 18a are designed to guide grinding and / or polishing dust. The air channels 18a are preferably intended to guide fresh air to the abrasive.

[0048] The grinding and / or polishing machine 12a has an extraction fan for extracting grinding and / or polishing dust, which can be generated in particular by processing a workpiece by the grinding and / or polishing machine 12a, preferably via the air ducts 18a (not shown here).

[0049] The grinding and / or polishing machine 12a has a drive unit, for example an electric motor, a pneumatic drive, or the like, for driving the grinding and / or polishing pad 48a, in particular the grinding and / or polishing pad device 10a, in a state connected to the grinding and / or polishing machine 12a (not shown here). It is conceivable that the grinding and / or polishing machine 12a is designed as an eccentric sander, a rotary sander, an orbital sander, or the like. The grinding and / or polishing machine 12a is cordless, in particular as a battery-operated grinding and / or polishing machine. Alternatively, it is conceivable that the grinding and / or polishing machine 12a is designed as a corded grinding and / or polishing machine.

[0050] The air ducts 18a extend at least substantially radially with respect to the principal normal 16a. The air ducts 18a extend radially outwards with respect to the principal normal 16a, at least in sections. Some sections of the air ducts 18a have a curved course, for example, a winding course, when viewed from the principal normal 16a. Other sections of the air ducts 18a have a straight course over their entire longitudinal extent.

[0051] The grinding and / or polishing pad device 10a has a cover unit 20a. The cover unit 20a is arranged on the machine side of the carrier unit 14a. The cover unit 20a limits and / or closes the air channels 18a, particularly on the machine side, at least partially.

[0052] The cover unit 20a is bonded to the carrier unit 14a. Alternatively, it is also conceivable that the cover unit 20a is detachably attached to the carrier unit 14a. In this context, "detachable" should be understood to mean, in particular, "separable without damage".

[0053] The cover unit 20a is designed to at least partially limit the air ducts 18a on the machine side. A main extension plane (not shown here) of the cover unit 20a runs at least substantially parallel to the main extension plane 26a of the support unit 14a. The cover unit 20a is disc-shaped and preferably made of a plastic.

[0054] The cover unit 20a has several recesses 22a (in the Fig. 2 and Fig. In Figure 3, only one of the recesses 22a is marked with a reference numeral. The recesses 22a define air passage openings 24a on the machine side for the air channels 18a. The opening cross-sections of the recesses 22a run at least substantially parallel to the main extension plane 26a of the support unit 14a. The main extension plane 26a of the support unit 14a runs at least substantially parallel to a main extension plane (not shown here) of the abrasive interface 80a. The air passage openings 24a are designed as extraction openings 46a for extracting grinding and / or polishing dust.

[0055] The carrier unit 14a has on the machining side a multitude of rib structure elements 28a extending at least substantially radially, in particular radially straight, with respect to the main normals 16a (in Fig. 6 shows only two rib structure elements 28a of the multitude of rib structure elements 28a).

[0056] The term "machining side" refers specifically to the abrasive side or the abrasive interface side. An abrasive side 96a or a machining side 32a of the carrier unit 14a faces away from the machine side 94a of the carrier unit 14a. The machining side 32a of the carrier unit 14a corresponds to the abrasive side 96a.

[0057] The support unit 14a has a support body 100a. The rib structure elements 28a are formed integrally with the support body 100a; preferably, the support body 100a incorporates the rib structure elements 28a. The rib structure elements 28a are designed as walls.

[0058] The rib structure elements 28a form side walls 30a of the air ducts 18a. Two rib structure elements 28a each form the side walls 30a of one of the air ducts 18a. The rib structure elements 28a project beyond the air ducts 18a on the machining side 32a of the support unit 14a in a direction parallel to the principal normal 16a of the support unit 14a.

[0059] The grinding and / or polishing pad device 10a includes the padding unit 34a. The padding unit 34a is foamed onto the carrier unit 14a on the machining side. The padding unit 34a is made of foam. The abrasive mounting unit 90a is arranged on the padding unit 34a. The abrasive mounting unit 90a and the carrier unit 14a are arranged on opposite sides of the padding unit 34a; in particular, the padding unit 34a is arranged between the carrier unit 14a and the abrasive mounting unit 90a. The rib structure elements 28a, in particular at least one portion of the rib structure elements 28a projecting towards the air channels 18a, are / are encased in foam by the padding unit 34a.An adhesive or activator can be applied between the upholstery unit 34a and the support unit 14a with the ribbed structure elements 28a prior to foaming to ensure particularly robust adhesion of the upholstery unit 34a during foaming. The ribbed structure elements 28a are designed for force transmission, in particular torque transmission, from the support unit 14a to the upholstery unit 34a. The air channels 18a are foamed over by the upholstery unit 34a on the processing side.

[0060] The upholstery unit 34a has air openings corresponding to the air openings of the drive interface unit 80a and / or the air openings 38a of the carrier unit 14a.

[0061] The carrier unit 14 has several air passage openings 38a, each connected to one of the air ducts 18a (in Fig. Figure 7 shows only one of the air passage openings 38a). The air passage openings 38a of the carrier unit 14a correspond to the air passage openings of the grinding interface 80a. The drive interface unit 36a has a plurality of teeth 40a on its outer circumference, in particular teeth arranged uniformly. The drive interface unit 36a is rotationally symmetrical, preferably with respect to the drive axis 98a. One of the air passage openings 38a of the carrier unit 14a is arranged between each pair of adjacent teeth 40a of the drive interface unit 36a. The drive interface unit 36a has a machine connection contour 102a for connection to an output element of the grinding and / or polishing machine 12a. The machine connection contour 102a surrounds the drive axis 98a.

[0062] The drive interface unit 36a is designed as a single piece. Alternatively, it is also conceivable that the drive interface unit 36a is designed as a multi-part unit, for example, two-part, three-part, or the like. The drive interface unit 36a is shown here as an example of a sintered component. Alternatively, it is conceivable that the drive interface unit 36a is designed as a sheet metal element. The drive interface unit 36a has a base body 104a. The base body 104a has the machine connection contour 102a. The machine connection contour 102a is arranged centrally on the base body 104a, in particular in a direction parallel to the drive axis 98a. The base body 104a has, in particular, the teeth 40a.

[0063] The drive interface unit 36a has a cranked shape (see Fig. 4) The drive interface unit 36a, in particular the base body 104a, has a centrally arranged offset 106a, preferably a centrally arranged projection, preferably in a direction parallel to the drive axis 98a. The machine connection contour 102a is arranged on the offset 106a. The offset 106a is surrounded in a radial direction, preferably with respect to the drive axis 98a, by an unoffset part 108a of the drive interface unit 36a, preferably of the base body 104a. The teeth 40a are arranged on the unoffset part 108a of the drive interface unit 36a, in particular of the base body 104a. The offset 106a is preferably arranged. The unoffset part 108a is arranged on the machining side.

[0064] The carrier unit 14a connects flush to a contact surface 50a of the drive interface unit 36a, in particular a cranked machine-side outer surface 52a of the drive interface unit 36a, for connection with the grinding and / or polishing machine 12a. The contact surface 50a extends, in particular, at least substantially perpendicular to the drive axis 98a.

[0065] The contact surface 50a adjoins the machine connection contour 102a. The machine connection contour 102a is designed for torque transmission from the grinding and / or polishing machine 12a to the grinding and / or polishing pad device 10a. The contact surface 50a is designed for alignment and / or axial contact of the grinding and / or polishing pad device 10a with the grinding and / or polishing machine 12a.

[0066] The drive interface unit 36a, in particular the base body 104a, has several air passage openings 54a, especially for dust extraction. Alternatively, it is conceivable that the drive interface unit 36a has only one air passage opening 54a. The air passage openings 54a are arranged radially, preferably radially with respect to the drive axis 98a, between the drive axis 98a, preferably the machine connection contour 102a, and the teeth 40a. The air passage openings 54a of the drive interface unit 36a have a uniform and / or circular arrangement, in particular around the drive axis 98a. The air passage openings 54a of the drive interface unit 36a are arranged symmetrically around the drive axis 98a.The air passage openings 54a of the drive interface unit 36a are each part of an axial air guide opening, in particular a material-free section, of the grinding and / or polishing pad device 10a, in particular of the grinding and / or polishing pad 48a.

[0067] The teeth 40a exhibit at least partially different tooth heights. The teeth 40a exhibit two different heights. Alternatively, it is conceivable that the teeth 40a exhibit more than two different heights.

[0068] Alternatively, it is also conceivable that the teeth 40a have the same height. The teeth 40a, which are arranged radially behind air passage openings 54a of the drive interface unit 36a, have the same height. The teeth 40a, which are arranged radially behind air passage openings 54a of the drive interface unit 36a, have a height that is different from, preferably less than, the height of teeth 40a that are arranged circumferentially, in particular in a plane perpendicular to the drive axis 98a, between two adjacent air passage openings 54a of the drive interface unit 36a.

[0069] The ratio of the total height 64a of the grinding and / or polishing pad device 10a, which in particular runs perpendicular to a main extension plane 66a of the grinding and / or polishing pad device 10a, to a maximum diameter 68a of the grinding and / or polishing pad device 10a, which in particular runs parallel to the main extension plane 66a of the grinding and / or polishing pad device 10a, is a maximum of 0.15.

[0070] The ratio of a maximum diameter 62a of the drive interface unit 36a to a maximum diameter 60a of the carrier unit 14a is at least 0.35.

[0071] Fig. Figure 10 shows a schematic diagram of a process for manufacturing the grinding and / or polishing pad device 10a. In one process step, in particular in an injection molding process step 70a, the air channels 18a extending transversely to the principal normal 16a are produced in the carrier unit 14a.

[0072] In one process step, in particular in injection molding process step 70a, the drive interface unit 36a is at least partially integrated into the carrier unit 14a. In injection molding process step 70a, the drive interface unit 36a is designed with a cranked shape and / or sprocket-like form and is at least partially integrated into the carrier unit 14a, in particular at least partially overmolded by the carrier unit 14a.

[0073] In a process step, in particular in a foaming step 72a, the cushioning unit 34a is foamed onto the carrier unit 14a on the processing side. In particular, the abrasive interface 80a and the drive interface unit 36a are placed in an injection mold, in particular with a sleeve 56a and a disc spring 58a. Preferably, the cushioning unit 34a is formed from a foam, in particular in a manner already known to a person skilled in the art.

[0074] The sleeve 56a, which is optional in particular, and / or the disc spring 58a are part of the grinding and / or polishing pad 48a, in particular the grinding and / or polishing pad assembly 10a. The disc spring 58a is designed to create an axial preload on a screw connection when mounted on the grinding and / or polishing machine 12a. The sleeve 56a is designed to integrate the disc spring 58a into the grinding and / or polishing pad 48a, in particular the grinding and / or polishing pad assembly 10a. The air passage openings in the padding unit 34a are created in a single process step, in particular by a punching process.

[0075] In a process step, in particular in a grinding step 74a, the drive interface unit 36a is ground on the machine side, in particular flush with the adjoining carrier unit 14a. The contact surface 50a of the drive interface unit 36a and / or a surface of the carrier unit 14a adjoining the contact surface 50a, in particular on the machine side, are ground, preferably such that the contact surface 50a and the surface of the carrier unit 14a adjoining the contact surface 50a are flush with each other.

[0076] It is also conceivable that in a process step, intake openings (see intake openings 78b of the) are located on a side facing away from the abrasive interface 80a in an edge area. Fig. 11 and Fig. 12) are generated.

[0077] The grinding and / or polishing pad 48a, in particular the grinding and / or polishing device 10a, has a weight of between 120 g and 140 g, preferably 130 g. Alternatively, however, it is also conceivable that the grinding and / or polishing pad 48a, in particular the grinding and / or polishing device 10a, has a weight that is less than 120 g or greater than 140 g.

[0078] The drive interface unit 36a, for example, has a maximum diameter of 59 mm. The maximum diameter 68a of the grinding and / or polishing pad device 10a is, for example, 148 mm.

[0079] In the Fig. 11, Fig. 12, Fig. 13, Fig. 14 to Fig. Figure 15 shows further embodiments. The following descriptions and drawings are essentially limited to the differences between the embodiments, whereby, with regard to identically designated components, especially those with the same reference numerals, reference is also generally made to the drawings and / or the description of the other embodiments, in particular the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9 to Fig. 10, reference can be made. To distinguish the embodiments, the letter a is the reference numeral of the embodiment in the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9 to Fig. 10. In the exemplary embodiments of the Fig. 11, Fig. 12, Fig. 13, Fig. 14 to Fig. In 15, the letter a is replaced by the letters b and c.

[0080] Fig. Figure 11 shows a grinding and / or polishing pad device 10b for a grinding and / or polishing machine. The grinding and / or polishing pad device 10b corresponds to a grinding and / or polishing pad 48b. The grinding and / or polishing pad device 10b has a carrier unit 14b. The carrier unit 14b has, on the machine side with respect to a principal normal 16b of the carrier unit 14b, a plurality of transversely extending air channels 18b, in particular extraction air channels (see Figure 11). Fig. 12).

[0081] The grinding and / or polishing pad device 10b has a padding unit 34b arranged on the carrier unit 14b. An end face 42b of the padding unit 34b has recesses 44b spaced apart from one another along a circumferential direction, in particular recesses that differ from openings, preferably from material-free sections (see figure). Fig. 13).

[0082] The recesses 44b on the end face 42b are uniformly arranged circumferentially. The recesses 44b are spaced apart from each other circumferentially. Each recess 44b has a varying maximum depth when viewed circumferentially. The maximum depth is measured radially with respect to the principal normal 16b. Alternatively, it is also conceivable that each recess 44b has a constant depth when viewed circumferentially.

[0083] A recessed area defined by the recesses 44b along the circumferential direction extends over at least 10% of a maximum circumferential extent of the end face 42b in the circumferential direction, preferably over at least 50%, preferably over at least 75%.

[0084] The grinding and / or polishing pad 48b, in particular the grinding and / or polishing pad device 10b, has an abrasive interface 80b. The grinding and / or polishing pad 48b, in particular the grinding and / or polishing pad device 10b, has several extraction openings 46b arranged on a side facing away from the abrasive interface 80b.

[0085] The grinding and / or polishing pad 48b, in particular the grinding and / or polishing pad device 10b, has several intake openings 78b for drawing in ambient air, arranged in an edge region on the side facing away from the abrasive interface 80b and in particular from a side surface 110b. The intake openings 78b are arranged on the machine side.

[0086] The grinding and / or polishing pad 48b has a top surface, in particular on the machine side. The grinding and / or polishing pad 48b has a bottom surface, in particular on the machining side. The top surface faces away from the bottom surface. The suction openings 78b are located on the top surface, in particular on one side of the machine. The top surface corresponds to the machine side. The side surface 110b connects the top surface to the bottom surface. The abrasive interface 80b, in particular an abrasive contact surface of the abrasive interface 80a, forms the bottom surface.

[0087] The grinding and / or polishing pad 48b, in particular the grinding and / or polishing pad device 10b, has a cover unit 20b. The cover unit 20b is arranged on the machine side of the carrier unit 14b. The cover unit 20b has recesses 22b. The cover unit 20b has the intake openings 78b. Part of the recesses 22b forms the intake openings 78b. Another part of the recesses 22b forms the extraction openings 46b.

[0088] The cover unit 20b of the sanding and / or polishing pad 48b forms the top surface. The cover unit 20b is glued to the carrier unit 14b. Alternatively, it is also conceivable that the cover unit 20b is detachably attached to the carrier unit 14b.

[0089] A principal extent plane of the cover unit 20b runs at least substantially parallel to a principal extent plane of the carrier unit 14b. The cover unit 20b is disc-shaped and preferably made of a plastic. The principal extent plane of the carrier unit 14b runs at least substantially parallel to a principal extent plane of the abrasive interface 80b.

[0090] Preferably, the grinding and / or polishing machine has an extraction fan for extracting grinding and / or polishing dust, which can be generated in particular by processing a workpiece by the grinding and / or polishing machine, preferably via the grinding and / or polishing pad 48b.

[0091] The intake openings 78b are designed to supply fresh air to the abrasive interface 80b. Fresh air can be drawn in through the intake openings 78b by the extraction fan.

[0092] Each opening cross-section of the intake openings 78b runs at least substantially parallel to the main extension plane (not shown here) of the abrasive interface 80b. The opening cross-sections of the intake openings 78b run at least substantially perpendicular to a drive axis of a drive interface unit 36b of the grinding and / or polishing pad 48b. The main extension plane of the abrasive interface 80b corresponds to a main extension plane of the abrasive contact surface of the abrasive interface 80b. The main extension plane of the abrasive interface 80b runs at least substantially perpendicular to the drive axis.

[0093] A minimum distance between the intake openings 78b and the drive interface unit 36b is greater than a minimum distance between the extraction openings 46b and the drive interface unit 36b. The minimum distance between the intake openings 78b and the drive interface unit 36b, in particular the drive axis, and / or the minimum distance between the extraction openings 46b and the drive interface unit 36b, in particular the drive axis, are / are preferably measured in a plane perpendicular to the drive axis and / or parallel to the main extension plane of the abrasive interface 80b.

[0094] The intake openings 78b are arranged in a circular pattern. They are arranged in a circle around the drive interface unit 36b, particularly around the drive axis. It is conceivable that the intake openings 78b have a constant distance from each other in the circumferential direction, which runs particularly in a plane perpendicular to the drive axis, or that the distances between the intake openings 78b vary in the circumferential direction.

[0095] The carrier unit 14b has several air channels 76b arranged on the machine side and extending transversely with respect to the main normal 16b, each of which connects to one of the intake openings 78b. The cover unit 20b limits and / or closes the air channels 76b at least partially.

[0096] The air ducts 76b are designed as intake air ducts for supplying fresh air to the abrasive interface 80b. It is conceivable that an airflow for drawing in fresh air via the air ducts 76b can be generated by the exhaust fan. The air ducts 76b run at least substantially perpendicular to the principal normal 16b of the support unit 14b. The air ducts 76b run at least substantially parallel to the principal extension plane of the support unit 14b. The principal normal 16b runs at least substantially perpendicular to the principal extension plane of the support unit 14b. The principal normal 16b runs at least substantially parallel to the drive axis of the drive interface unit 36b.

[0097] The air ducts 76b extend at least substantially radially with respect to the drive interface unit 36b. The air ducts 76b have a straight course over their entire longitudinal extent. Alternatively, it is conceivable that at least a portion of the air ducts 76b extend radially outwards, at least section by section, with respect to the principal normal 16b. For example, it is also conceivable that at least a portion of the air ducts 76b have a curved course, such as a winding course, section by section, starting from the principal normal 16b.

[0098] The grinding and / or polishing machine 12a of embodiment a from Fig. 1 comprises a housing sub-unit 82a, in particular a friction ring 84a. The housing sub-unit 82a, in particular the friction ring 84a, at least partially covers the extraction openings 46b, particularly in a state of the grinding and / or polishing pad 48b arranged on the grinding and / or polishing machine 12a. The edge region, in particular the edge region encompassing the extraction openings 78b, is arranged outside the housing sub-unit 82a, particularly in a state of the grinding and / or polishing pad 48b arranged on the grinding and / or polishing machine 12a.

[0099] The carrier unit 14b has several air ducts 18b extending transversely to the principal normal 16b on the machine side. The air ducts 18b connect to the extraction openings 46b. The air ducts 18b are designed as extraction air ducts. At least some of the air ducts 18b have a helical course, particularly when viewed radially with respect to the principal normal 16b.

[0100] Fig. Figure 14 shows a grinding and / or polishing pad device 10c for a grinding and / or polishing machine. The grinding and / or polishing pad device 10c corresponds to a grinding and / or polishing pad 48c. The grinding and / or polishing pad device 10c has a carrier unit 14c. The carrier unit 14c is designed as a metal plate, such as a steel plate, an aluminum plate, or the like. The carrier unit 14c is free of air channels that extend at least substantially transversely to a principal normal of the carrier unit 14c.

[0101] The grinding and / or polishing pad 48c, in particular the grinding and / or polishing pad device 10c, has an abrasive interface 80c. The grinding and / or polishing pad 48c, in particular the grinding and / or polishing pad device 10c, has several extraction openings 46c arranged on a side facing away from the abrasive interface 80c.

[0102] The grinding and / or polishing pad 48c, in particular the grinding and / or polishing pad device 10c, has several intake openings 78c for drawing in ambient air, arranged in an edge region on the side facing away from the abrasive interface 80c and, in particular, from a side surface 110c. The carrier unit 14c has several recesses 22c. The carrier unit 14c has the intake openings 78c. Some of the recesses 22c form the intake openings 78c. Another part of the recesses 22c forms the extraction openings 46c.

[0103] Each opening cross-section of the intake openings 78c runs at least substantially parallel to a main extension plane 86c of the abrasive interface 80c (cf. Fig. 15).

[0104] The grinding and / or polishing pad 48c, in particular the grinding and / or polishing pad device 10c, has a padding unit 34c. The padding unit 34c has axially extending air channels. The intake openings 78c are fluidically connected to the abrasive interface 80c, in particular to the outlet openings of the abrasive interface 80c, via a portion of the axially extending air channels. The extraction openings 46c are fluidly connected to the abrasive interface 80c, in particular to the extraction openings of the abrasive interface 80c, via another portion of the axially extending air channels.

[0105] The grinding and / or polishing pad 48c has a drive interface unit 36c. The drive interface unit 36c is riveted to the carrier unit 14c. The padding unit 34c is glued to the carrier unit 14c on the machining side.

Claims

[1] Grinding and / or polishing pad device (10a; 10b) for a grinding and / or polishing machine (12a), with a carrier unit (14a; 14b), characterized by , that the carrier unit (14a; 14b) has at least one air duct (18a; 18b, 76b) extending transversely with respect to a principal normal (16a; 16b) of the carrier unit (14a; 14b), in particular an exhaust air duct. [2] Grinding and / or polishing pad device (10a; 10b) according to claim 1, characterized by , that the air duct (18a; 18b, 76b) runs at least substantially radially with respect to the principal normals (16a; 16b). [3] Grinding and / or polishing pad device (10a; 10b) according to one of the preceding claims, characterized by a cover unit (20a; 20b) which is arranged on the machine side of the carrier unit (14a; 14b) and which at least partially limits and / or closes the air duct (18a; 18b, 76b), in particular on the machine side. [4] Grinding and / or polishing pad device (10a; 10b) according to claim 3, characterized by , that the cover unit (20a; 20b) has at least one recess (22a; 22b) which defines an air passage opening (24a) for the air duct (18a; 18b, 76b) on the machine side, in particular with an opening cross-section which runs at least substantially parallel to a main extension plane (26a) of the support unit (14a; 14b). [5] Grinding and / or polishing pad device (10a; 10b) according to any one of the preceding claims, characterized by , that the carrier unit (14a; 14b) has at least one rib structure element (28a) extending at least substantially radially, in particular radially straight, with respect to the principal normals (16a; 16b). [6] Grinding and / or polishing pad device (10a; 10b) according to claim 5, characterized by, that the rib structure element (28a) forms a side wall (30a) of the air duct (18a; 18b, 76b), in particular rib structure elements (28a) form side walls (30a) of all air ducts (18a; 18b, 76b). [7] Grinding and / or polishing pad device (10a; 10b) according to claim 5 or 6 characterized by , that the rib structure element (28a) on a machining side (32a) of the support unit (14a) extends beyond the air duct (18a; 18b, 76b) in a direction parallel to the principal normal (16a) of the support unit (14a). [8] Grinding and / or polishing pad device (10a; 10b) according to any one of the preceding claims, characterized by a cushioning unit (34a; 34b) which is foamed onto the carrier unit (14a; 14b) in the processing direction with respect to the carrier unit (14a; 14b). [9] Grinding and / or polishing pad device (10a; 10b) according to any one of the preceding claims, characterized bya sprocket-shaped drive interface unit (36a), wherein the carrier unit (14a) has an air passage opening (38a) connected to the air duct (18a; 18b, 76b), which is arranged between two adjacent teeth (40a) of the sprocket-shaped drive interface unit (36a). [10] Grinding and / or polishing pad device (10b) at least according to the preamble of claim 1, in particular according to one of the preceding claims, characterized by a cushion unit (34b) arranged on the carrier unit (14b), the end face (42b) of which has recesses (44b) spaced apart from each other along a circumferential direction, in particular recesses, preferably free of material sections. [11] Grinding and / or polishing pad device (10b) according to claim 10, characterized by, that a depression area defined by the depressions (44b) extends along the circumferential direction over at least 10% of a maximum circumferential extent of the end face (42b) in the circumferential direction. [12] Grinding and / or polishing machine (12a) with a grinding and / or polishing pad device (10a; 10b) according to one of the preceding claims. [13] A method for manufacturing a grinding and / or polishing pad device (10a; 10b), in particular according to one of claims 1 to 11, wherein in a process step, in particular in an injection molding process step (70a), an air channel (18a; 18b, 76b) extending transversely to a principal normal (16a; 16b) of a carrier unit (14a; 14b) is produced in the carrier unit (14a), in particular by foaming a padding unit (34a; 34b) onto the carrier unit (14a; 14b) in a processing step, and in particular by forming a rib structure element (28a) of the carrier unit (14a; 14b) a side wall (30a) of the air channel (18a; 18b, 76b) and / or by integrating a drive interface unit (36a) at least partially into the carrier unit (14a; 14b) is incorporated.

Images