PURPOSE: To increase an interval of a time in which molded products are piled, by a method wherein a screen device, formed such that plural conveyors are situated between a pair of front and rear rotatable interlocking frames, is connected to the end on the downstream side of a conveyor for outputting a molded prod.

CONSTITUTION: A molded prod screen device 3 is situated to the end on the downstream side of a conveying device 2 disposed on the output side of a throt tle press 1, and molded prods W delivered from screening devices 3 are conveyed in a manner that they are screened into upper and lower conveying devices 4 and 5 positioned in 2 stages. The screening device 3 is provided on both sides with a pair of front and rear interlocking frames 6 and 9, each having plural chevron-shaped arms 11 mounted radially around a boss part 7. A self- running type conveyor 13, having a belt stretched between and around pulleys 12 and 12 with built-in motor situated to the end part of the arm 11, is located between the interlocking frames 6 and 9. Interlocking rotation of the interlocking frames 6 and 9 causes screening of the molded prods W to the conveying devices 4 and 5, respectively.