Complete vibrating machine line arrangement
JOEST delivered the complete vibrating machines to Trakya Dokum’s new smart foundry in Turkey. The plant is designed for the production of various automotive cast iron parts in a vertical flaskless molding line. The molding line is a DISA 270A; mold dimensions 950 mm x 700 mm, operated at 400 moulds/hour, 150 t/h sand throughput in average, 12 t/h liquid metal in average with inductotherm dual track melting furnace.
After the SBC (Synchronized Belt Conveyor), the molds dump on a reversible conveyor and pass on a shakeout with adjustable frequency and adjustable vibrating angle directly. This soft handling track is for fragile parts which cannot be processed in a rotating drum.
The main track directly connects end of molding line SBC, shotblast machine, grinding area and melting shop in a straight way. After the SBC, the molds dump on a reversible conveyor and pass to a 25 m inclined linear sand/casting conveyor and a 90° curve which follows this conveyor. Conveying he parts on such a long distance together with the sand allows heat dissipation from the castings to the surrounding sand mass flow.
This conveyor arrangement is followed by a rotating drum without any grids and a shakeout with adjustable frequency and adjustable vibrating angle in order to clean the casting surface from sand, reducing sand lump size, and finally draining the dissolved sand through the grids.
After the shakeout, the castings pass on a primary sorting conveyor for removing the downsprue, runner and riser before they enter the DISA CT shotblast machine.
The shotblast machine is followed by a secondary sorting conveyor. Castings are separated from return scrap; the castings are conveyed to the grinding area and the return scrap is processed in a hydraulic V-jaw breaker in order to reduce the size. After this machine, the return scrap is conveyed directly back to the charging plant.
All unbalance motor machines are supported on two mass isolation frames; all resonance conveyors are mass compensated in order minimize the transmission of dynamic forces in the foundry floor. All shakeouts are equipped with variable vibrating frequency and vibrating angle in order to allow best processing parameters corresponding to each individual casting.
The target of this project was the erection of a zero-compromise layout in order to avoid any kind of ineffective manual handling and fork lift handling of castings in boxes. Efficient teamwork of the innovative Trakya Dokum foundry top management and engineering department and the JOEST engineering team successfully hit this target.