| 摘要 |
PURPOSE:To obtain a mold whose heat loss is small and heating/cooling periods are short, by making the cavity forming wall, especially the bottom surface only, elevate its temp. by means of induction heating. CONSTITUTION:A cavity forming wall 1 of a thin box type (the cross section is approx. of H type), for example, made of nickel and a coil-like shaped cupper pipe placed in the cavity below the cavity forming wall 1 heat conductivity, electrical insulating property and non-magnetic property and a lining reinforcing material 5, having poor heat conductivity and is an insulator and a non-magnetic material, are placed thereunder. A microwave generator is equipped at both ends 6, 6 of the pipe coil 4, which are, for example, connected with water pipes. It is possible thereby to inductively heat the bottom surface 5 of the cavity forming wall 1 by turning on the microwave electric current and to cool the mold by passing through water. |
