| 摘要 |
PROBLEM TO BE SOLVED: To provide an evacuation device for a vacuum molding capable of improving the control accuracy of the degree of evacuation by narrowing the fluctuation width to the set value of the degree of evacuation in molding a vacuum molding. SOLUTION: In an evacuation device for a vacuum molding, an exhaust port of a dust collector 4 for a vacuum pump with a vacuum gauge 3 is communicated with a suction port of a vacuum pump unit 2 with a vacuum breaker 1 for safety valve through a connection communication pipe 5, a suction port of the dust collector 4 for vacuum pump is communicated with a suction pipe 6, and a vacuum breaker 7 for controlling the degree of evacuation is mounted on the connection communication pipe 5 for the suction pipe 6. |
