| 摘要 |
PROBLEM TO BE SOLVED: To provide a jet nozzle device for blasting, which drastically reduces pressure loss at a nozzle portion of a blast device, improves the grinding efficiency of a workpiece by an abrasive material, and facilitates mixture ratio control between air and the abrasive material, and to provide a connection structure between a blast hose and the jet nozzle. SOLUTION: The connection structure is comprised of an end hole shape holding means 18 for holding an end opening 12a of the elastic blast hose 12 in a desired end hole shape by holding pressure force from the outside. The end hole shape holding means 18 slantingly crushes an outer surface of the hose so as to be inclined downward from the vicinity of the end of the elastic blast hose 12 to the tip of the hose, to thereby hold the end opening in the desired end hole shape. Further a blast nozzle 14 is connected to an edge of the elastic blast hose 12, which communicates with the end hole of the hose and has a jet port at an end thereof. Thus a channel inner wall surface in the hose, extending to the end hole is defined by a continuous curved surface, and therefore the channel resistance loss is drastically reduced. Further the arbitrary end hole shape can be easily obtained. COPYRIGHT: (C)2005,JPO&NCIPI
|
