| 摘要 |
PROBLEM TO BE SOLVED: To provide a reactive injection molding machine capable of simply molding a microcellular foamed molded object having a small cell size for a short time by sufficiently dissolving an inert fluid such as carbon dioxide or nitrogen in a raw material. SOLUTION: The raw material is supplied by raw material quantitative pumps 8 and 9 while the inert fluid is supplied by inert fluid quantitative supply pumps 12 and 13, and not only the raw material and the inert fluid are allowed to collide with each other to be mixed mutually but also even the flows of the inert fluid and the flows of the raw material are respectively allowed to collide with each other in premixing units 14 and 15 equipped with a pair of inert fluid jet parts 19 and a pair of raw material jet parts 20 arranged in opposed relationship on the same plane to be continuously premixed and the mixtures are pressurized and/or heated by high pressure heaters 16 and 17 to continuously dissolve the inert fluid in the raw material and, thereafter, the raw material is injected in a mold 5 under pressure by a mixing head 4 to perform RIM molding.
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