Anti-squeal shim (100) comprising a fiber reinforced vibration insulating layer (110) and a vibration absorbing layer (120), the fiber reinforced vibration insulating layer comprises reinforcement fibers, a filler material and a binder material. There is also provided a method of producing anti-sque
Anti-squeal shim (100) comprising a fiber reinforced vibration insulating layer (110) and a vibration absorbing layer (120), the fiber reinforced vibration insulating layer comprises reinforcement fibers, a filler material and a binder material. There is also provided a method of producing anti-squeal shims, and a method of preventing squeal noise from a disc brake.
대표청구항▼
1. A method for making an anti-squeal shim comprising: producing, by a paper making process, a vibration insulating sheet having a first major surface and a second major surface wherein the vibration insulating sheet comprises fibre reinforced predominantly vibration insulating material, wherein the
1. A method for making an anti-squeal shim comprising: producing, by a paper making process, a vibration insulating sheet having a first major surface and a second major surface wherein the vibration insulating sheet comprises fibre reinforced predominantly vibration insulating material, wherein the fibre reinforced predominantly vibration insulating material comprises reinforcement fibre, filler material, and binder material, wherein the vibration insulating sheet is thicker than 110 μm and thinner than 200 μm, and the fibre content by weight in the fibre reinforced predominantly vibration insulating material is 80% or less;applying a predominantly vibration absorbing layer to the first major surface of the vibration insulating sheet to form an anti-squeal shims sheet; andcutting the anti-squeal shims sheet to form at least one anti-squeal shim. 2. The method of claim 1, further comprising bonding a first major surface of a metal sheet to the second major surface of the vibration insulating sheet before the step of cutting the anti-squeal shims sheet to form at least one anti-squeal shim. 3. The method of claim 2, further comprising bonding at least one additional vibration insulating sheet to a second major surface of the metal sheet before the step of cutting the anti-squeal shims sheet to form at least one anti-squeal shim. 4. The method of claim 3, further comprising bonding at least one additional metal sheet to an un-bonded surface of the at least one additional vibration insulating sheet in alternating layers. 5. The method of claim 2, wherein the first major surface of the metal sheet is bonded to the second major surface of the vibration insulating sheet by at least one of applying pressure, applying heat, vulcanization, application of a bonding agent, application of a resin, application of a cyan, or application of an adhesive. 6. The method of claim 1, wherein the predominantly vibration absorbing layer is applied by a wet application technique and/or by bonding a preformed vibration absorption film to the first surface of the vibration insulating sheet. 7. The method of claim 1, wherein the predominantly vibration absorbing layer is a layer of a viscous media arranged in between a first rigid plate and a second rigid plate. 8. The method of claim 7, wherein the predominantly vibration absorbing layer is formed by: applying the layer of the viscous media to a surface of the first rigid plate; andarranging the second rigid plate on the viscous media, opposite the first rigid plate. 9. The method of claim 8, wherein the predominantly vibration absorbing layer is applied by bonding the first rigid plate to the first major surface of the vibration insulating sheet. 10. The method of claim 1, wherein the shims sheet has a pad side and an outer side, wherein the vibration insulating sheet is arranged at the outer side, and the predominantly vibration absorbing layer is arranged at the pad side. 11. The method of claim 1, wherein the reinforcement fibres comprise at least one of organic fibers, aromatic polyamide fibres, polyamide fibres other than aromatic polyamide fibres, polyolefine fibres, polyester fibres, polyacrylonitrile fibres, polyvinyl alcohol fibres, polyvinylchloride fibres, polyurea fibres, polyurethane fibres, polyfluorocarbon fibres, phenol fibres, cellulose fibres, inorganic fibres, glass fibre, ceramic fibre, rock wool, mineral wool, fused quartz fibre, chemical processed high silica fibre, fused alumina silicate fibre, alumina continuous fibre, stabilized zirconia fibre, boron nitride fibre, alkali titanate fibre, whiskers, or boron fibre. 12. The method of claim 1, wherein the predominantly vibration absorbing layer is a visco-elastic layer. 13. The method of claim 12, wherein the visco-elastic layer is an acrylic or silicone based adhesive layer. 14. The method of claim 1, wherein the fibre content by weight in the fibre reinforced predominantly vibration insulating material is 50% or less. 15. The method of claim 1, wherein the fibre content by weight in the fibre reinforced predominantly vibration insulating material is 30% or less. 16. The method of claim 1, wherein the fibre content by weight in the fibre reinforced predominantly vibration insulating material is 23% or less. 17. The method of claim 1, wherein the fibre content by weight in the fibre reinforced predominantly vibration insulating material is more than 10%. 18. The method of claim 1, wherein the fibre content by weight in the fibre reinforced predominantly vibration insulating material is more than 14%.
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