FRICTION LINING FOR INDUSTRIAL BRAKES AND DRIVE ELEMENTS AND METHOD FOR PRODUCING A FRICTION LINING FOR INDUSTRIAL BRAKES AND DRIVE ELEMENTS

Abstract

The invention relates to a friction lining for industrial brakes and drive elements, said lining including a dual-layer structure, a friction layer being connected to a backing layer. In such a friction lining which is particularly suited to industrial applications, the backing layer is inherently resilient and the friction layer and/or the backing layer is/are produced from a synthetic material-elastomer composite.

Claims

1. A friction lining for industrial brakes and drive elements comprising a dual-layer structure, including a friction layer connected to a backing layer, the backing layer is embodied inherently resilient and at least one of the friction layer or the backing layer comprising a synthetic-elastomer composite.

2. The friction lining according to claim 1, wherein the backing layer comprises 10% to 40% elastomer, 0% to 20% resins, and 40% to 80% fillers, and the friction layer (2) comprises 0% to 25% elastomer, 5% to 30% resins, and 45% to 70% fillers.

3. The friction lining according to claim 2, wherein the elastomer of the backing layer is a rubber.

4. The friction lining according to claim 1, wherein the backing layer in a finished state of the friction lining has a shore hardness of maximally 100 ShD.

5. The friction lining according to claim 1, wherein the backing layer in the finished state of the friction lining has a shear strength of at least 1 N/mm.sup.2.

6. The friction lining according to claim 1, wherein the friction layer includes grooves.

7. The friction lining according to claim 6, wherein the friction layer is at least partially separated by grooves.

8. A method for production of a dual-layer friction lining for industrial brakes and drive elements, in which a friction layer is connected to a backing layer, the method comprising: producing the friction layer or the backing layer as inherently resilient in a pre-pressing process as a semi-finished part, applying a base material of the backing layer or the friction layer and hot-compressing the base material with the semi-finished part.

9. The method according to claim 8, wherein for the production of the semi-finished part, the friction layer or the backing layer is hot or cold pressed or rolled or punched out.

10. A method for the production of a dual-layer friction lining for industrial brakes and drive elements, in which a friction layer is connected to a backing layer, the method comprising separately producing the friction layer and the backing layer embodied in an inherently resilient fashion from each other, and then hot compressing or gluing the friction layer and the backing layer together.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The invention allows numerous embodiments. Some of them shall be explained in greater detail based on the figures shown in the drawings.

[0019] Shown are:

[0020] FIG. 1 an exemplary embodiment of a friction lining according to the invention, and

[0021] FIG. 2 a top view of the friction layer of the friction lining according to the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] FIG. 1 shows an exemplary embodiment of a friction lining 1 according to the invention, which is embodied annularly. It is discernible from the side view that the friction lining 1 is made from two layers, i.e. a friction layer 2 and a backing layer 3, which is also called under-layer. The dual-layer friction lining 1 is fastened for the application via the backing layer 3 on a stiff rotor of the industrial brake or a drive element, for example a clutch. The friction layer 2 is a synthetic elastomer composite, which comprises 0% to 25% elastomer in the form of rubber and 5% to 30% resins. It has filler ratios from 45% to 70%.

[0023] The synthetic elastomer composite the backing layer 3 is made from is a composite material made from SBR-rubber, with the ratio thereof amounting from 10% to 40%. Additionally, from 0% to 20% resins and 40% to 80% fillers are contained therein. The backing layer 3 has in the finished state a hardness of maximally 80 ShD, preferably less than 60 ShD, in order to ensure sufficient inherent resilience of the backing layer. The ideal hardness depends on the respective application, the compression, and the friction layer used. The backing layer 3 has a shearing strength adjusted to the shearing and rotation forces developing in the respective application, however exceeding 1 N/mm.sup.2, preferably exceeding 2 N/mm.sup.2. Both layers 2, 3 are adjusted to each other such that they can be securely connected to each other.

[0024] As discernible from FIG. 2, the friction layer 2 comprises grooves 4 in equal distances on its surface, which almost completely penetrate the friction layer 2 in its depth. Here, the groove base 5 is embodied narrower than the opening of the groove 4 at the top of the friction layer 2. This way the segments 6 of the friction layer 2, marked similar to the parts of the friction layer 2 between the grooves 4, are decoupled and can therefore align in an ideal fashion.

[0025] The friction lining 1 described can be produced as follows. In a first embodiment the carrier layer 3 is hot pressed or cold pressed. Alternatively the backing layer 3 may be rolled or punched out. Subsequently, perhaps after a cutting process, the backing layer 3 produced as a semi-finished product is compressed with a prefabricated mixture for the friction layer 2 in a hot press. The prefabricated mixture for the friction layer 2 comprises here a base material similar to granulate.

[0026] In one alternative a base material similar to granulate can first be hot pressed or cold pressed or rolled or punched to form the friction layer 2 and this way it can be produced as a semi-finished product. After a potential cutting process a prefabricated mixture of the backing layer 3 similar to granulate is compressed in the hot press with the semi-finished part of the friction layer 2. Here the friction layer 2 and the backing layer 3 can be deformed, conically stressed, or loosely cured.

[0027] In another alternative the friction layer 2 and the backing layer 3 can be produced separately from each other as semi-finished parts and directly hot compressed with each other. The semi-finished parts can also be cured and subsequently glued to each other.

[0028] Due to this production process it is ensured that the dual-layer friction linings 1 can be produced with a predefined thickness ratio between the friction layer 2 and the backing layer 3. Furthermore, such a secure bonding between the two layers 2, 3 is ensured by way of assembly or directly compressing the materials. The friction linings 1 developed in this fashion have sufficiently small plating in order to allow easily integrating them into existing production processes of industrial brakes.

[0029] The solution presented provides friction linings with a dual-layer design and grooved friction layer for high dynamic and static friction values and good inherently resilient features as well as a reduced noise development for the use in industrial brakes and drive elements.

LIST OF REFERENCE CHARACTERS

[0030] 1 Friction lining [0031] 2 Friction layer [0032] 3 Backing layer [0033] 4 Groove [0034] 5 Groove base [0035] 6 Segment