Abstract: A conveyor system having an expansion conveyor interposed between some of a plurality of conveyors of a conveying unit to extend the conveying line when trouble is detected at a receiving unit. Upon detection of trouble the extruder revolution speed and the conveyor speed are changed to reduce the conveying speed not to carry molded products to the receiving unit.

Abstract: Buffer means 20Z consisting of an expansion conveyor 20a, inverted conveyor 20b and expansion conveyor 20c is interposed between the conveyors 24 and 25 of a conveying unit 20 so that when a trouble occurs in a receiving unit 30, the expansion conveyors 20a and 20c of the buffer means 20Z are expanded to extend the conveying line, and the extruder revolution R and the conveyor speed V are changed to reduce the conveying speed not to carry the extruded treads 1 to the receiving unit 30. When the above trouble is solved, the conveying line of the buffer means 20Z is made the shortest, and the extruder revolution R and the conveyor speed V are changed to increase the conveying speed so as to carry the buffered extruded treads to the receiving unit 30.