| 摘要 |
PURPOSE: A curved pipe manufacturing method is provided to improve productivity and reduce a failure rate by quickly and stably drawing out a curved pipe from a mold. CONSTITUTION: A curved pipe manufacturing method comprises the steps of: preparing upper and lower molds which arranged vertically symmetrically to each other and formed with insertion and curved paths on the junction side thereof(S100), inserting a pipe material into the insertion paths(S200), inserting a mandrel having a smaller diameter than the curved paths of the upper and lower molds along the curvature of the curved paths(S300), and pushing the pipe material loaded in the insertion paths into a curved annular gap between the curved paths and the mandrel to form the pipe material into a curved pipe(S400).
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