LINE MIXER

PROBLEM TO BE SOLVED: To provide a line mixer which has a simple structure, improves a maintenance property and a safety and health, and at the same time, increases mixing effects to improve a productivity of a mixture, a fluid mixing device containing the line mixer, and a manufacturing method of manufacturing the mixture rapidly with the fluid mixing device. SOLUTION: The line mixer 4 has a construction that a passage 8a comprises a narrowed part 8d in which a passage diameter l becomes narrowest halfway in the passage 8a, a reduced part 8c in which the passage diameter l narrows from one end part of a pipe 4c toward the narrowed part 8d, and an enlarged part 8f in which the passage diameter l enlarges from the narrowed part 8d toward the other end part of the pipe 4c, the ratio of the length of the passage 8a of the enlarged part 8f to the length of the passage 8a of the reduced part 8c should be in the range of 1-10, and the ratio of the passage diameter l4 of both end parts of the pipe 4c to the passage diameter l3 of the narrowed part 8d should be in the range of 1.5-10. A plurality of line mixers 4 are provided linkably. COPYRIGHT: (C)2008,JPO&INPIT