| 摘要 |
PURPOSE:To obtain the blow molded product which is heat treated efficiently and has an improved heat stability, by blow molding a parison by the use of the blow molding equipment having the high-frequency wave passing window composed of the substance of a small dielectric loss tangent as one part of a mold, then high-frequency heat treating the molded product through said window. CONSTITUTION:After a parison 3 is blow molded in a mold 1 by the use of the blow molding equipment having the high-frequency wave passing window 2 composed of the substance of a small dielectric loss tangent as one part of the mold, the blow molded product 3 in the mold 1 is heat treated by heating with the high-frequency wave introduced through said high-frequency wave passing window 2. By such a way, the blow molded product which is provided with a heat treatment industrially favorably and has an improved heat stability can be obtained. |
