Nichias Corporation

Masaki Yoshihara

Takahiro Niwa

Kunihiko Yano

Tadashi Mori

Motonori Kondoh

Kaname Arimizu

Tadashi Arai

Seiji Sakurada

Hidenobu Yamagishi

Provided is a cutting apparatusincluding a workpiece fixing jigthat supports a workpiece, rotates by operation of rotary drive means, and rotates the workpiecewhile fixing the workpiece; rotary drive meansfor driving and rotating the workpiece fixing jig; support meanstofor supporting the workpiecewhile rotating along with rotation of the workpiece fixing jig; cutter knivesandthat cut the rotating workpieceat least at axially opposite ends of the workpiece; and slide moving meansfor slidably moving the cutter knives. The cutting apparatushaving 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.

Cutting apparatus

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/cm&#xb7;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/cm&#xb7;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.

Sound-proof material and process for production thereof, sound-proof molding, and sound insulation method

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/cm&#xb7;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.

Soundproof cover and method for producing the same

Vibration damping shim structure

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,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.

Squeak preventing shim

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.

Growing community of inventors

Tokyo, Japan

Masaki Yoshihara