| 摘要 |
<p>The present invention relates to a blowing valve for plastic container molding. The blowing valve of the present invention comprises penetration holes (31A, 31B, 31C) passing vertically through the inside of a first piston, a second piston and a third piston (30A, 30B, 30C) installed inside a cylinder block. A control block comprises discharge holes (41, 42, 43) which are connected with a first cylinder, a second cylinder and a third cylinder (21, 22, 23) and discharge the air inside the cylinder. The upper parts of the discharge holes form a first solenoid valve, a second solenoid valve and a third solenoid valve (V1, V2, V3) which selectively open and close the each discharge hole. The present invention simplifies a structure by eliminating the necessity of the supply of separate control pressure for controlling the operation of the piston by the configuration and performs the close open operation of the valve quickly and correctly by operating the piston with the compressed air of high pressure.</p> |
