DEVICE FOR CLEANING LOOSE MATERIALS Russian patent published in 1997 - IPC

FIELD: foundry; the invention can be used for screening sand and other loose materials, as well as for isolation of metallic and nonmetallic inclusions from heap moulding sands. SUBSTANCE: the proposed device has immovable main axle and springs mounted between screen rods. Clearances between rods may be changed by compressing or releasing springs with the aid of control nut. The novelty in the device consists in that the springs are mounted on the main axle with a capability of changing clearances between the rods with the use of the control nut. Besides, a limiter is installed between the webs of rotary frame for preventing jumping up and sticking of a rod or throwing a rod or a group of rods into non-working position (turnover through 180 deg), which is probable in case of entry of concentrated load (stone, piece of metal, etc.) onto the screen. EFFECT: saved time required for setting up due to simultaneous adjustment of all clearances between screen rods. 5 dwg