| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sprue bush using a ceramic heater which hardly breaks as a heating means capable of keeping synthetic resin in molten state even with a simple structure. Ž<P>SOLUTION: The sprue bush 1 is constituted by integrally forming a tabular base body 2 to be fixed to a metal mold, a cylindrical body 3 erected perpendicular to the base body 2 and in which a flow path of molten resin is formed in an axial center, and a tabular body 4 arranged parallel to the cylindrical body 3 and erected perpendicular to the base body 2. Further, the ceramic heater 10 is accommodated between the outer planar face 3c of the cylindrical body 3 and the inner planar face 4a of the plate like body 4. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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