Abstract: Provided is a cutting apparatus 10 including a workpiece fixing jig 2 that supports a workpiece 1, rotates by operation of rotary drive means 3, and rotates the workpiece 1 while fixing the workpiece 1; rotary drive means 3 for driving and rotating the workpiece fixing jig 2; support means 4a to 4c for supporting the workpiece 1 while rotating along with rotation of the workpiece fixing jig 2; cutter knives 5a and 5b that cut the rotating workpiece 1 at least at axially opposite ends of the workpiece 1; and slide moving means 6 for slidably moving the cutter knives. The cutting apparatus 10 having a simple apparatus configuration does not produce chips as a result of cutting with small variations in size and with high planarity of cut surfaces.

Abstract: The present invention relates to a sound-proof material containing a first sound-absorbing material disposed facing a sound source, a first soft sound-insulating layer laminated on a face of the first sound-absorbing material opposite to the sound source and having an air permeability measured in accordance with JIS L1018 of 10 cc/cm2·sec or lower, a second sound-absorbing material laminated on the first soft sound-insulating layer, and a second soft sound-insulating layer laminated on the second sound-absorbing material and having an air permeability measured in accordance with JIS L1018 of 10 cc/cm2·sec or lower and a Young's modulus measured in accordance with JIS K7127 greater than or equal to five times that of the first soft sound-insulating layer, in which at least the second soft sound-insulating layer is partially or entirely bonded to the second sound-absorbing material.

Abstract: Provided is a cutting apparatus 10 including a workpiece fixing jig 2 that supports a workpiece 1, rotates by operation of rotary drive means 3, and rotates the workpiece 1 while fixing the workpiece 1; rotary drive means 3 for driving and rotating the workpiece fixing jig 2; support means 4a to 4c for supporting the workpiece 1 while rotating along with rotation of the workpiece fixing jig 2; cutter knives 5a and 5b that cut the rotating workpiece 1 at least at axially opposite ends of the workpiece 1; and slide moving means 6 for slidably moving the cutter knives. The cutting apparatus 10 having a simple apparatus configuration does not produce chips as a result of cutting with small variations in size and with high planarity of cut surfaces.

Abstract: The present invention relates to a sound-proof material containing a first sound-absorbing material disposed facing a sound source, a first soft sound-insulating layer laminated on a face of the first sound-absorbing material opposite to the sound source and having an air permeability measured in accordance with JIS L1018 of 10 cc/cm2·sec or lower, a second sound-absorbing material laminated on the first soft sound-insulating layer, and a second soft sound-insulating layer laminated on the second sound-absorbing material and having an air permeability measured in accordance with JIS L1018 of 10 cc/cm2·sec or lower and a Young's modulus measured in accordance with JIS K7127 greater than or equal to five times that of the first soft sound-insulating layer, in which at least the second soft sound-insulating layer is partially or entirely bonded to the second sound-absorbing material.

Abstract: The present invention relates to a soundproof cover containing: a sound-absorbing material disposed facing to a sound source; a soft sound-insulating layer laminated on the sound-absorbing material and having an air permeability measured according to JIS L 1018 (1999) of 10 cc/cm2·sec or less; and a soft cover forming an air layer with the soft sound-insulating layer and having a Young's modulus measured according to JIS K 7127 (1999) of 0.2 to 1.5 GPa, in which the air layer is hermetically sealed.

Abstract: The present invention relates to a soundproof cover containing: a sound-absorbing material disposed facing to a sound source; a soft sound-insulating layer laminated on the sound-absorbing material and having an air permeability measured according to JIS L 1018 (1999) of 10 cc/cm2·sec or less; and a soft cover forming an air layer with the soft sound-insulating layer and having a Young's modulus measured according to JIS K 7127 (1999) of 0.2 to 1.5 GPa, in which the air layer is hermetically sealed.

Abstract: The present invention provides an anti-squeal shim for use in a disc brake comprising a pressing member for pressing a brake pad toward a disc rotor and a back plate of the brake pad in a disc brake, wherein the anti-squeal shim comprises a plated steel plate and a rubber layer, wherein the rubber layer is fixed on at least one side thereof.

Abstract: In order to provide a shim structure capable of controlling the generation of a voltage by the difference in the standard electrode potentials specific to metals between an aluminum caliper and a metal plate, the shim structure abutting against the backing plate of a friction material, which forms a disc pad, is constituted by providing rubber layers on both sides of an aluminum alloy plate. Since the aluminum alloy plate is used for the metal plate constituting the shim structure, even when a steel caliper is replaced with the aluminum caliper, the generation of the voltage generated between metals is controlled to a lesser degree, thereby preventing corrosion of the caliper arising therefrom.

Abstract: A vibration damping shim structure is provided, which not only can sufficiently exert vibration damping effect in a wide range of temperatures, but also can prevent a squeal phenomenon particularly in low temperatures.

Abstract: A vibration damping shim structure is provided, which not only can sufficiently exert vibration damping effect in a wide range of temperatures, but also can prevent a squeal phenomenon particularly in low temperatures. A rubber coating layer a1 is formed on one side of a first constraint plate a2 of a metallic plate and a second constraint plate a4 is stuck to the other side of the first constraint plate a2 with a adhesive layer a3 placed in-between. The ratio of the thickness of the first constraint plate a2 to a sum total of the thickness of the back plate b1 forming a disc brake B and the second constraint plate a4 is taken as within 0.1 to 0.2, and the second constraint plate a4 is used so as to be brought into contact with the back plate b1.

Abstract: A squeak preventing shim for a disk brake for an automobile has a squeak preventing effect, even if no lubricant is used, and also prevents decreased durability due to buckling, flow, etc. A shim construction is formed with a plurality of grooves or recesses in rubber layers 2 disposed on two surfaces of a metal plate in a rubber coated member. Owing to these grooves or recesses, apparent transversal elastic modulus of the rubber layers is lowered and a squeak preventing effect due to vibration in a parallel direction to the shim can be obtained, even if no lubricant is used. Further, since longitudinal elastic modulus does not vary much, the shim construction is durable.

Abstract: In order to provide a shim for preventing brake squeal in a disk brake, which can decrease high frequency noise (squealing phenomena) produced at braking, a rubber coated metal, in which a rubber layer is disposed on one surface of a metal plate is used and a pressure sensitive adhesive layer is disposed directly on the other surface of the metal plate, the pressure sensitive adhesive layer may include a primer layer on the other surface of the metal plate. The pressure sensitive adhesive layer of this shim structure serves as an adhesive portion to be stuck to a backplate of a disk brake pad. Since the pressure sensitive adhesive layer is disposed on the metal plate, the pressure sensitive adhesive layer is never peeled off from the rubber coated metal and its damping action (brake squeal preventing action) is maintained.