| 摘要 |
PROBLEM TO BE SOLVED: To provide a flask for vacuum molding whose constitution can be simplified, and which achieves the lower cost of a vacuum casting molding line and further can cope with many kinds of products. SOLUTION: The flask includes: a frame body 12 in which upper and lower faces are opened, and also, ventilation passages 11 are formed around them; an air venting pipe 13 communicating with the ventilation passages via one side face inner wall of the frame body; a filter member 24 provided to the side face inner wall of the frame body and covering many vent holes provided so as to penetrate the ventilation passages; and a suction valve provided to the frame body and connecting the external suction device to the ventilation passages. COPYRIGHT: (C)2011,JPO&INPIT |
