Abstract: A segment-type friction material has blocks each composed of four segment pieces. Five blocks are stuck by adhesion to a core metal 2 along an entire circumference thereof so as to constitute one surface of the segment-type friction material. Gaps are provided between the five blocks to form oil grooves that make an automatic transmission fluid (ATF) to flow. Five oil grooves are formed in total on one surface as a whole of the segment-type friction material.

Abstract: A zinc-rich water-based paint blends a binder and a chelating agent in a zinc slurry. The zinc slurry is blended in an amount of 61.7% by weigh. A potassium as the binder is blended in an amount of 30.0% by weight. A blending quantity of an ion exchange water is decreased as a blending quantity of EDTA-4K as the chelating agent is increased such as 0.2, 0.4, 0.7, 1.4 and 2.4% by weigh as, so that a total quantity becomes 100%.

Abstract: A water-based coated-type vibration damping material uses a styrene-butadiene copolymer emulsion as a resin emulsion and a calcium carbonate as an inorganic filler. The water-based coated-type vibration damping material limits a blending amount of a glycol to 2% by weight or less. In case of making a coated layer by such water-based coated-type vibration damping material, there is no blister generation observed after a hot water immersion of 168 hours (7 days), after a hot water immersion of 336 hours (14 days) and after a hot water immersion of 1000 hours, either.

Abstract: A wet-type segmented friction material has a tape-like friction material substrate which is passed through and pressed between a roller having a dent at a center and a flat roller. At the same time, the friction material substrate is heated from an inside and an outside of the rollers so as to carry out a heat press compression processing. Then, a processed friction material substrate has a predetermined cross-section. The processed friction material substrate is cut into segment pieces each having a segment shape by a rotary push cutter having a sharp cutting edge. A cut position of the segment piece is selected such that two straight lines at two lateral sides of the segment shape is located within an area of a compressed portion of the processed friction material substrate. That is, a stepped or sunken compressed portion is provided on both sides of the segment piece.

Abstract: A baking-drying water damping paint composition from which heavy film-thickness damping paint films can be obtained, heavy film-thickness damping paint films, in which an inorganic filler is filled into the resinous component of paints to higher extent, and which are free from the occurrence of cracks and swelling in the paint films when the paint films are baked and dried.

Abstract: A friction material has a resin amount distribution that is the largest at a portion near a non-friction surface, that becomes lower toward an inside and that is the lowest at a portion near a friction surface. For example, such friction material is manufacture as follows. First, two friction materials are overlapped while the friction surfaces faced with each other. Then, the friction materials are dried at a room temperature. At this time, the resin has such a characteristic as to move while dragged by a solvent that dries from the non-friction surface located outside. Using such characteristic, the resin amount at the portion near the friction surface is lessened. Then, a temperature at the friction surface is made low and a temperature at the non-friction surface is made high in a drying step of the friction material. Thereby, the resin amount at the portion near the friction surface is lessened.

Abstract: A friction material has a resin amount distribution that is the largest at a portion near a non-friction surface, that becomes lower toward an inside and that is the lowest at a portion near a friction surface. For example, such friction material is manufacture as follows. First, two friction materials are overlapped while the friction surfaces faced with each other. Then, the friction materials are dried at a room temperature. At this time, the resin has such a characteristic as to move while dragged by a solvent that dries from the non-friction surface located outside. Using such characteristic, the resin amount at the portion near the friction surface is lessened. Then, a temperature at the friction surface is made low and a temperature at the non-friction surface is made high in a drying step of the friction material. Thereby, the resin amount at the portion near the friction surface is lessened.

Abstract: A segment-type friction material is composed of segment pieces. An outer circumference of the segment piece is away from an outer circumference of a core plate. A setback amount is about 2 mm. Then, a gap between the outer circumference of the segment piece and an inner peripheral part of an automatic transmission case becomes large. Thus, there is generated a part at which a gap between the segment pieces and a separator plate becomes large in a disengaged state.

Abstract: A cooling fan has a metal spacer, a boss made of Nylon integrally formed with the spacer by an insert molding and seven blades extending outward therefrom. A skew angle of about 30 degrees is provided at a connecting portion or a base end portion of the blade to the boss so as to be inclined backward in relation to a rotating direction of the cooling fan. To the contrary, a skew angle of about 8 degrees is provided at a portion extending from the connecting portion to the leading end of the blade so as to be inclined forward in relation to the rotating direction.

Abstract: A ring-shaped core metal is pressed and compressed by a main punch and a counter punch so as to have a wave shape. Moreover, each group of three micro-protrusions provided on each of top points of the wave shape are cut in the core metal. Then, three notches are cut on the core metal corresponding to the micro-protrusions. Furthermore, plastic flow is generated at a surface layer of the core metal due to partial compression by the notches at the time of pressing and compressing. Then, the waves are formed on the core metal with the notches as the top points. The notches are cut at seven sections respectively on a front surface and a rear surface of the core metal. Thus, seven waves are formed on the core metal in total. Since the notches are formed on the front and the rear surfaces of the waves, a “return” phenomenon is not generated as seen in a conventional cool working method. Thus, the waves are formed at high accuracy.

Abstract: A zinc dust containing slurry is prepared by mixing 7.8 weight percent of a solution of a sodium silicate. 72.0 weight percent of the demineralized water, 0.2 weight percent of a surface active agent and 20 weight percent of zinc dust. A waterborne coating material is obtained by mixing and stirring 25 parts by weight of a lithium silicate into 100 parts by weight of the zinc dust containing slurry.

Abstract: A cooling fan has a ring-shaped metal spacer, a boss of substantially a cylindrical shape made of a synthetic resin that is molded integrally with the spacer as an insert and lural blades that extend outwardly from the boss. A deep-drawn part is provided on an outer circumferential part of the spacer at an inside of the boss. A thickness of the boss is made large at around a front end side of the blade on which the largest stress is applied. A rib at an inner periphery of the boss at around the front end side of the blade is made thicker than the other ribs. Moreover, an interval between that rib and an adjacent rib is made narrower.

Abstract: A wet friction material and its manufacturing method are provided. The wet friction material has a substrate having a surface and a very superficial layer. The very superficial layer is provided on the surface of the substrate and contains resin and fibers. The resin and the fibers are heated by one of a laser beam, a heating plate and a heating roller so as to thermally change the very superficial layer in a short period of time. Such manufacturing method is capable of evenly carbonizing the resin and the fibers of the very superficial layer of a friction surface of the wet friction material so as to flexibly deal with a variety of size of products.

Abstract: This invention relates to a manufacturing method and a manufacturing apparatus of friction plate for clutch. The present invention intends to provide the manufacturing method and the manufacturing apparatus of friction plate for clutch which can adhere the plural friction material segments to the core plate in shorter time period than that in the conventional art. The manufacturing method comprises a step for containing plural friction material segments 2 on a one surface 70a of a holding body 4 circumferentially; and a step for making the one surface of said holding body 4 and an adhering surface of a core plate 8 coated with an adhesive agent come near to each other, and for adhering the friction material segments 2 held by said holding body 4 to the adhering surface of said core plate 8 by urging.

Abstract: A substrate fiber for a dry friction material includes a trunk portion extending in the axial direction of the fiber and divergent portions slightly diverged from a part of the trunk portion and having small diameters. The diameter of the trunk portion is from about 10 to 20 &mgr;m and the length of the trunk portion is from about 0.5 to 5 mm.

Abstract: Disclosed is an acrylic sol for a sound insulating underbody coating. It includes acrylic polymer fine particles, a plasticizer, a filler, a plasticizer, a blocking type urethane resin, a curing agent and a foaming agent. Since it includes the acrylic polymer particles as a major constituent unit, it does not generate a hydrogen chloride gas and dioxins when it is burned. Moreover, since the paint film resulting from the acrylic sol has a net-shaped structure by the cross-linkage reactions of the urethane resin, and since the bulkiness of the paint film is increased by the foaming agent, it has a good cold resistance and adhesion property toward automotive steel plates, and effects a superb chipping resistance and sound insulating performance.

Abstract: A wet friction material and its manufacturing method are provided. The wet friction material has a substrate having a surface and a very superficial layer. The very superficial layer is provided on the surface of the substrate and contains resin and fibers. The resin and the fibers are heated by one of a laser beam, a heating plate and a heating roller so as to thermally change the very superficial layer in a short period of time. Such manufacturing method is capable of evenly carbonizing the resin and the fibers of the very superficial layer of a friction surface of the wet friction material so as to flexibly deal with a variety of size of products.

Abstract: This invention relates to a manufacturing method and a manufacturing apparatus of friction plate for clutch.

Abstract: A wet type friction member includes a core plate, a plurality of segmental friction units and oil grooves. The segmental friction units are bonded on the core plate at intervals in a ring-shaped manner. The oil grooves are demarcated and formed by facing end surfaces of neighboring two pieces of the segmental friction units, and connect an inner peripheral side of the core plate with an outer peripheral side thereof. At least one of the facing end surfaces of the segmental friction units have a cut-off portion, which is cut off inwardly, at an inner peripheral side end of the facing end surfaces and/or an intermediate portion thereof. The oil grooves are provided with a major-width portion of a wide groove width by the cut-off portion at an inner peripheral side opening of the oil grooves and/or an intermediate portion thereof.

Abstract: This invention relates to a manufacturing method and a manufacturing apparatus of friction plate for clutch. The present invention intends to provide the manufacturing method and the manufacturing apparatus of friction plate for clutch which can adhere the plural friction material segments to the core plate in shorter time period than that in the conventional art. The manufacturing method comprises a step for containing plural friction material segments 2 on a one surface 70a of a holding body 4 circumferentially; and a step for making the one surface of said holding body 4 and an adhering surface of a core plate 8 coated with an adhesive agent come near to each other, and for adhering the friction material segments 2 held by said holding body 4 to the adhering surface of said core plate 8 by urging.