摘要 |
<p>PURPOSE:To perform higher pressure casting and finely and precisely control the start-up condition of the pressure in a pressurizing chamber, i.e., injecting and filling condition. CONSTITUTION:In this system, an accumulator 11 for storing the gas pressurized with a compressor 7, an air cylinder 14 for supplying the gas from the accumulator through a first change-over valve, a hydraulic cylinder 28 connected with a piston body in a piston rod 30 commonly used to the piston body of the air cylinder, hydraulic control system for the hydraulic cylinder and a second change-over valve arranged between the air cylinder and the pressurizing chamber 1 are provided. Then, the area of the piston body in the hydraulic cylinder 28 is set larger than the area of the piston body of the air cylinder 14 and the high pressure gas supplied into the air cylinder is pressurized by the pressure of the hydraulic cylinder and supplied into the pressurizing chamber.</p> |