Drive belt and method for the production thereof
The invention relates to a drive belt for a traction mechanism drive, having a radially externally arranged top layer ( 4 ) composed of a fiber-containing elastomer or of an elastomer comprising a fiber mesh, having a radially centrally arranged tension member layer ( 6 ) composed of a wound tension strand or a plurality of circumferentially oriented tension strands, and a radially internally arranged substructure ( 8 ) composed of an elastomer, wherein at least one wedge-shaped rib is integrally formed in the substructure ( 8 ), a coating layer ( 10 ) composed of a circumferentially open fiber mesh being applied to the outer surfaces of said wedge-shaped rib. In order to prevent an abrupt change in the friction coefficient at the force-transmitting flanks of the ribs, provision is made for the circumferential ends ( 12, 14 ) of the coating layer ( 10 ) and a parting joint ( 16 ), which is filled by the elastomer of the substructure ( 8 ), between said circumferential ends ( 12, 14 ) of the coating layer ( 10 ) to be covered with a transverse strip ( 18 ) composed of a vulcanizable material, wherein said vulcanizable material has a reduced friction coefficient in relation to the elastomer of the substructure ( 8 ).
1. A drive belt coil for a traction mechanism drive, the drive belt coil comprising:
a radially externally arranged top layer comprising of a fiber-containing elastomer;
a radially arranged substructure comprising an elastomer;
a coating layer comprising a circumferentially open fiber mesh being applied to an outer surface of the radially arranged substructure, the coating layer having circumferential ends defining a parting joint; and
a transverse strip comprising a vulcanizable material and having a reduced friction coefficient in relation to the radially arranged substructure.
2. The drive belt coil as claimed in claim 1 , wherein the vulcanizable material of the transverse strip is a two-component nitrile foam (2K-NFT).
3. The drive belt coil as claimed in claim 1 , wherein the vulcanizable material of the transverse strip is flocked with a fiber material.
4. The drive belt coil of claim 1 , wherein the fiber-containing elastomer has a radially centrally arranged tension member layer.
5. The drive belt coil of claim 4 , wherein the radially centrally arranged tension member layer is composed of a wound tension strand, and/or a plurality of circumferentially oriented tensions strands.
6. The drive belt coil of claim 1 , wherein the parting joint exposes filled elastomer of the radially arranged substructure.
7. The drive belt coil of claim 1 , further comprising a plurality of individual drive belts cut off from the drive belt coil after vulcanization.
8. The drive belt coil of claim 7 , wherein the plurality of individual drive belts have a rib surface on an outside.
9. The drive belt coil of claim 1 , wherein the coating layer exposes an outer surface of a portion of the radially arranged substructure between the circumferential ends.
10. The drive belt coil of claim 1 , further comprising at least one wedge-shaped rib formed in the substructure.
11. A method of producing a drive belt for a traction mechanism drive, the method comprising:
applying a fiber containing elastomer to a belt building drum;
wrapping a plurality of tension strands around the applied elastomer to form a tension member layer;
applying an elastomer to the tension member layer to form a radially arranged substructure;
applying a coating layer having a fiber mesh to the radially arranged substructure and defining a parting joint; and
applying a vulcanizable material over the parting joint to form a transverse strip.
12. The method of claim 11 , wherein applying the coating layer comprises forming a first end and a second end of the coating layer to define the parting joint.
13. The method of claim 11 , further comprising removing a belt blank having the transverse strip and the substructure from the belt building drum and inserting the belt blank into a vulcanization mold.
14. The method of claim 13 , further comprising vulcanizing the belt blank to form a plurality of ribs in the substructure, the coating layer and the transverse strip.
15. The method of claim 14 , further comprising cutting a plurality of drive belts from the belt blank after removing the vulcanized belt blank from the mold.
16. The method of claim 11 , wherein the transverse strip comprises a two-component nitrile foam (2K-NFT).
17. The method of claim 11 , wherein applying the vulcanizable material comprises rolling the vulcanizable material onto the parting joint.
18. The method of claim 11 , wherein applying the vulcanizable material comprises spraying the vulcanizable material onto the parting joint.
19. The method of claim 11 , further comprising flocking the vulcanizable material with a fiber material after applying the vulcanizable material.