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US 12,410,843 B2Granted
Binder-free friction linings, process for their production and their use
AssigneeTMD Friction Services GmbH
InventorsRichard Lewis, Paulo Perin
Life of this patent
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Abstract
Expanded graphite and/or vermiculite are introduced into the friction lining mixture to eliminate or substantially reduce the amount of binder present therein. The friction lining at most contains from 2.5% by weight of binder. By omitting/reducing binder, the production is very stable and the friction linings can be easily reproduced. The process steps of hardening (including the hardening furnace) and scorching (including the necessary equipment) can be omitted when making such friction linings.
Claims9
A method for producing a friction lining, comprising:
- preparing a friction lining mixture that contains from 10% to 65% by weight of steel fibers, stainless steel fibers and/or iron fibers, from 5% to 26% by weight of expanded graphite particles with a particle size in a range of from 0.25 mm to 1.5 mm and/or expanded vermiculite particles, and a binder in an amount of from 0% to 2.5% by weight relative to the friction lining mixture, wherein the amount of copper is 0% by weight;
- compressing the friction lining mixture in a heated mold at a temperature in the range of from 135° C. to 240° C. for up to 300 seconds to cohesively bind together the fibers with the expanded graphite and or expanded vermiculite in the friction lining, and, if the binder is present, to self-adhesively cure the binder;
- and
- wherein the compressed friction lining mixture is not hardened or scorched.
1 more element
A method for producing a friction lining, comprising:
- preparing a friction lining mixture that consists essentially of from 10% to 65% by weight of steel fibers, stainless steel fibers and/or iron fibers, from 5% to 26% by weight of expanded graphite particles with a particle size in a range of from 0.5 mm to 1.5 mm, and a binder in an amount of from 0% to 2.5% by weight relative to the friction lining mixture, wherein the amount of copper is 0% by weight;
- and
- compressing the friction lining mixture in a heated mold at a pressure of from 45 MPa to 200 MPa, at a temperature in the range of from 135° C. to 240° C., and for a pressing time duration of from 50 seconds to 300 seconds to cohesively bind together the fibers with the expanded graphite in the friction lining, and, if the binder is present, to self-adhesively cure the binder;
- and
- wherein the compressed friction lining mixture is not hardened.
2 more elements
Dependencies are inferred from the claim text.