ABRASIVE PRESSURE-FEED METHOD IN BLAST MACHINING DEVICE, ABRASIVE PRESSURE-FEED MEANS AND VIBRATION GENERATING MEANS, AND ABRASIVE SUPPLYING DEVICE PROVIDED WITH ABRASIVE PRESSURE-FEED MEANS AND VIBRATION GENERATING MEANS

摘要

PROBLEM TO BE SOLVED: To provide an abrasive supplying device for a direct-pressure type blast machining device which can supply a fixed amount of the abrasive without causing defective supply even when powder abrasive is used.;SOLUTION: At the bottom in a pressurized tank 45 communicating with the lower end of an abrasive tank 40, an injection port 48 is opened upwardly for injecting compressed air into the pressurized tank 45, and a feed pipe 46 penetrating between side walls of the pressurized tank 45 located upper than the accumulation position of an abrasive to be put into the pressurized tank 45. An abrasive supply port 43 is provided in this feed pipe 46 located in the pressurized tank 45, the abrasive blown up in the pressurized tank 45 by an air flow of the compressed air injected from the injection port 48 is introduced into the feed pipe 46 with the compressed air in the pressurized tank 45, and this is conveyed to a blast nozzle by the compressed air flowing in the feed pipe 46. This pressurized tank 45 is preferably loaded on a vibration generating means 60 for generating vibration through introduction of the compressed air.;COPYRIGHT: (C)2003,JPO