| 摘要 |
<P>PROBLEM TO BE SOLVED: To be able to quickly change the pressing force of hydraulic cylinders in an upper mold according to the movement of a press molding apparatus, and to thin piping from the hydraulic cylinders to secure lay-out property. <P>SOLUTION: This pressure control system 50 includes a supply side hydraulic path 30 for supplying an operating fluid to the hydraulic cylinders 4 arranged in an upper mold 2 of the press molding apparatus 51, and a return side hydraulic path 20 for discharging the operating fluid from the hydraulic cylinders 4. The return side hydraulic path 20 has a pressure damping container 13 connected to the hydraulic cylinders 4 through a return side on-off control valve 26, and the passage cross section of a first passage 21 from the hydraulic cylinders 4 to the pressure damping container 13 is larger than that of a second passage 24 downstream of the pressure damping container 13. <P>COPYRIGHT: (C)2013,JPO&INPIT |
