Fine bubble generator and method for forming the same

Abstract

This enables injection molding of fine bubble generators without using the thin pins required in conventional methods. [Solution] The first member 10 has a protruding portion 12 that protrudes axially from the first member body 11 and a first flow path 16 that extends axially within the first member body 11, with a part of its inner surface being continuous with the inner surface of a recess 12a of the protruding portion 12. The second member 20 has a recessed portion 22 into which the protruding portion 12 is inserted and a second flow path 21 that extends axially and is continuous with the recessed portion 22. A fine bubble generating portion 15 is formed in the space formed between the inner surface of the recess 12a of the protruding portion 12 and the inner surface of the recessed portion 22, and the fine bubble generating portion 15 is formed in the region surrounded by the inner surface of a radially opening narrow portion formed in the protruding portion 12 and the inner surface of the recessed portion 22.

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