| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an extrusion mold which can carry out stable production by suppressing the occurrence of damage in a molding when the molding having a hollow hole is molded by extruding a molding material. Ž<P>SOLUTION: The extrusion mold A has a support part 1 in which a circulation hole 3 which partitions the passage of the molding material back and forth and penetrates the passage back and forth and a plurality of projections 2 projecting from the support part 1 forward. A ventilation hole 17 penetrating back and forth is formed in the projection 2. A ventilation route 21 through which an air current supplied from the outside circulates and which communicates with the ventilation hole 17 of the projection 2 is formed in the support part 1. The support part 1 and the projection 2 are connected to each other by uneven engagement between a connection hole 18 formed on the front side of the support part 1 and a connection part 16 formed at the rear end of the projection 2. An outside taper in which an outer diameter becoming smaller toward the rear end side is formed on the peripheral surface of the connection part 16, and an inside taper corresponding to the outside taper is formed on the inner surface of the connection hole 18. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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