| 摘要 |
PROBLEM TO BE SOLVED: To perform a molding process in a short cycle by supplying a large quantity of a heating medium into a mold within a short time by setting the sum total of the cross-sectional areas of the steam supply pipes connected to a mold and the cross- sectional area of the steam main piping to the mold to a specific ratio. SOLUTION: Saturated steam is supplied to a mold 3 on the side of a cavity to enter the steam chamber 1 on the side of the cavity from the steam main piping 9 on the side of the cavity through the steam supply pipe on the side of the cavity and also supplied to a mold 4 on the side of a core to enter the steam chamber 2 on the side of the core from the steam main piping 10 on the side of the core through the steam supply pipe 16 on the side of the core. In this case, a value of (the sum total of the cross-sectional areas of the steam pipings 15, 16 connected to the mold)/(the cross-sectional area of the steam main pipings 9, 10 to the mold) is set to 1.5-3.0. For example, when pipes 65A are respectively used in the steam main pipings 9, 10 by one and four pipes 50A are respectively used in the steam supply pipes 15, 16, 87.9 cm<2> /36.2 cm<2> = about 2.42 is formed. As a result, the pressure loss by the steam supply pipes is reduced to a large extent and a large quantity of saturated steam can be supplied to molds 3, 4 within a short time. |
