| 摘要 |
A tap molding device of the elbow inside is provided to process the screw thread in the inside diameter of a hole formed in both side of elbow with a first and second molding unit. A tap molding device(10) of the elbow inside comprises a first and second molding unit(14a,14b) installed on the upper end of bed. The first molding unit and the second molding unit have the structure of being identical and are driven with the power source. The molding units processes the screw thread holes(52a,52b) formed in both side of elbow(50) at the same time.
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