Sand adjustment attaching core making machine

摘要

PURPOSE:To obtain the best packing condition in accordance with size and shape of a core by arranging a valve having adjusting means for opening time at supplying side of a hopper. CONSTITUTION:By shrinking an extending/shrinking rod 17 in a cylinder 6 for traversing, a blowing head 5 is slided to the right direction and at the same of coinciding with lower part of a hopper 3, one side of the head 5 pushes a projection 9 in a sliding shutter 10, and the shutter 10 is slided to open the lower end of the hopper 3. At the same time, a limit switch in the head 5 pushes down a sensor lever of the limit switch 16 to output an electric signal, and a solenoid valve 14 is worked, and the extending/shrinking rod 13 is shrunk to open the shutter 11 and also work the timer 17. After passing through the setting time, the solenoid valve 14 is changed and the extending/shrinking rod 13 is extended to shut the shutter 11. Sand quantity supplied from the hopper 3 to the head 5 is adjustable with the setting time of the timer 17 to adjust the packing of the sand to the best value of the sand quantity in accordance with the size and shape of the core to be manufactured.