| 摘要 |
PROBLEM TO BE SOLVED: To simplify pippins and, at the same time, miniaturize an inlet and an outlet, wiich are respectively the connecting portion between the pippins by a method wherein one piping, which passes through a top mold, a bottom mold and a core mold in an arbitrary order, is provided by connecting the inlet of either one of the molds with the outlet of either one of the remaining molds. SOLUTION: In each mold, a hot water inlet 10 and an outlet 12, which are respectively connected with a mold temperature controlling means through a feed pipe 14 and a discharge pipe 16, is provided. By feeding hot water through the inlet 10 and discharging it through the outlet 12, the hot water is circulated through a top mold 4, a bottom mold 6 and a core mold 8 so as to keep the respective molds at predetermined temperatures. In this case, by connecting the inlet with the outlet, one piping 18, which passes through the top mold 4, the bottom mold 6 and the core mold 8 in an arbitrary order, is simultaneously provided. For example, one piping passes from the inlet 18 through the bottom mold 6, the core mold and the top mold 4 in the order named so as to connect the top mold 4 with the outlet 12. Thus, the miniaturization of the inlet 10 and the outlet 12 as the connecting portion between molds becomes possible together with the simplification of the piping 18. |
