| 摘要 |
PROBLEM TO BE SOLVED: To provide a nozzle having a specific flow channel effective for solving the problems of conventional method for the production of a nozzle having a structure to supply a fluid at an extremely small flow rate comprising the use of an electrical discharge machine for the boring of a hole having extremely small diameter to cause the decrease of the effective depth, i.e., the thickness of the hole and lower the durability of the nozzle by the abrasion of the hole and impossible to form a hole of particular shape on the nozzle. SOLUTION: A small hole is formed by a set-in method of parts without using an electrical discharge machine and a working machine by ignoring the shape of a election hole 19 of a nozzle to form an ejection hole unit 7 on a bush 8. A gap functioning as a flow channel 19 of the nozzle is formed at the diagonal part of an insertion opening 12 for the pyramidal fluid-guiding member by the difference between the area of the insertion opening 12 for the pyramidal fluid-guiding member and the cross-sectional area of a fluid-guiding member 14. The nozzle is produced by inserting the fluid-guiding member 14 into the insertion opening 12 of the bush 8 and welding the pyramidal inner circumference 12a of the opposite contacting part of the bush 8 to the pyramidal outer circumference 14a of the opposite contacting part of the fluid-guiding member 14.
|
