Chang Jin-screw conveyor machinery production overflow metallurgy, building materials, chemicals, food and machining departments widely used as a continuous conveyor equipment. Overflow screw conveyor features are: simple structure, the cross-section of small size, good sealing, reliable, low cost, ease of loading and unloading the middle, conveying the reverse direction, the opposite can also be transported in both directions simultaneously . Delivery process but also on the material stirring, mixing, heating and cooling operations. Adjustable material flow through the loading gate. But not transport perishable, viscous, easy caking and chunks of material. Material easily broken during transport, and spiral chute easy to wear. Larger units of power. Use to maintain the tightness between the trough and trough screw with proper clearance. Perpendicular to the vertical screw conveyor is suitable for short-distance transportation. Flexible screw conveyor screw shaft and a flexible blade composed of synthetic rubber, easy to bend, can be arbitrarily arranged according to the site or process requirements, space transportation. Screw conveyor blades have now pull and pull the entire loss, now pull any thickness can be made with the size, the entire production of non-standard screw pull inappropriate. Overflow-type screw conveyor advantages: screw conveyors and other transportation equipment, compared with the whole cross-section of small size, good sealing performance, stable and reliable, low cost, ease of loading and unloading the middle, conveying the reverse direction, may also be fed simultaneously to the two opposite directions. Delivery process but also on the material stirring, mixing, heating and cooling operations. Work rotating screw conveyor spiral blade passage of the material were transported screw conveyor, so that the material does not rotate together with the screw conveyor blades is the material force of its own weight and the material of the friction screw conveyor housing. Rotating shaft helical screw conveyor welding blades, blade surface transport of materials depending on the type of entities face, belt surface type, surface type and other types of blades. Screw conveyor screw axis in the direction of movement of materials terminal has thrust bearings with the material to spiral axial reaction force, the longer the captain, should be added to the intermediate hanger bearings.