| 摘要 |
PURPOSE:To fill up the moldimg sand without producing vibration and noise, by removing air and taking off the sheet and then, suppling hardening gas, after putting in the molding sand containing gas hardening binder in molding flask placed on the mold board having many small holes and covering with a specific sheet and then, pressing the sand by compressed air. CONSTITUTION:Upper face of the molding flask 33 filled up the molding sand 36 containing gas hardening binder in the pattern part 29 of the pattern board 28 perforated plural small holes 30, is covered by the sheet having flexibilty and non- ventilating property previously. Next, the board 28 is placed on the roller conveyor 9 and is moved on the fixed table 1 from the right direction. Then, the flask 33 is surrounded by the cover member 16 having the piston rod 15 able to move up and down and the sand 36 is pressed by introducing compressed air. Compressed air is entered the dented part 3 through the sand 36, bent plug 31, small holes 30 and is discharged in the air through the opening 4 and the duct 5. Next, the sand 36 is hardened by supplying the hardening gas in the hollow room 37 through the duct 5 and the opening 4. |
