Abstract: When manufacturing a disk valve having a ring-shaped elastic seal member fixed to one side thereof for use in a cylinder type hydraulic shock absorber, a disk valve blanked from a plate material is set on a bottom of a lower mold member that is curved to be convex on one side. Mold clamping is performed to form a cavity by a cylindrical mold part and to press the disk valve with a press part to deform the disk valve into a shape that is convex on one side. In this state, the cavity is filled with a rubber material through a passage and vulcanized and cured to mold and fix an elastic seal member to the disk valve. At this time, the disk valve is deformed in a direction in which the curvature reduces by shrinkage of the rubber material.

Abstract: The present invention provides a system 1A for supplying processing water 3, which is used in the operation of processing a target object with a highly pressurized jet of processing water 3 containing an abrasive, including: a tank 2 for storing the processing water 3, having a lower portion substantially tapering downwards; a supply pipe 5 for supplying the processing water 3 to the tank 2; a delivery pipe 8 having an opening 9 located inside the tank 2; a pressure mechanism 7 located outside the tank 2, for pressurizing the processing water 3; and a suction port 10 provided in the side surface of the delivery pipe 8. The processing water 3 in the tank 2 is stratified into a deposition portion 4A, which is a portion where the abrasive is deposited, and a clear-water portion 4W, which is a portion other than the deposition portion 4A and formed by clear water substantially free from the abrasive.

Abstract: A cutting apparatus jets, at a high pressure, water containing abrasive grains to cut a workpiece along cutting lines extending in intersecting directions. The cutting apparatus includes: a fixing table fixing the workpiece; groove portions provided in the fixing table at respective positions below the cutting lines; protruded portions provided in regions of the fixing table other than regions where the groove portions are provided, in a manner that the workpiece contacts the protruded portions; support portions provided to connect the protruded portions substantially in parallel with cutting lines extending the Y direction along the groove portions; a frame portion provided to connect the support portions to each other in at least a part of an outer periphery of the fixing table; and protection members attachably and detachably provided to cover the support portions.

Abstract: A cutting apparatus jets, at a high pressure, water containing abrasive grains to cut a workpiece along cutting lines extending in intersecting directions. The cutting apparatus includes: a fixing table fixing the workpiece; groove portions provided in the fixing table at respective positions below the cutting lines; protruded portions provided in regions of the fixing table other than regions where the groove portions are provided, in a manner that the workpiece contacts the protruded portions; support portions provided to connect the protruded portions substantially in parallel with cutting lines extending the Y direction along the groove portions; a frame portion provided to connect the support portions to each other in at least a part of an outer periphery of the fixing table; and protection members attachably and detachably provided to cover the support portions.