PURPOSE: To enhance production efficiency, suppress the evaporation of styrene monomer and the like and prevent the characteristics of bulk molding compound (BMC) from deteriorating by a method wherein BMC which is enclosedly or ready-enclosedly stored in a storage box is conveyed with a conveyer to a shifter and, after that, automatically and successively fed from the shifter to the hopper of a molder.

CONSTITUTION: The interior of a storage box 1, storing BMC 2 is made of a reading enclosed structure consisting of an outer cylinder 11 and a rotary table 15 in the state that the clearance necessary for the rotation of the rotary table 15 is made between the bottom opening part of the outer cylinder 11 and the rotary table 15. The rear part of a conveying box 71 acts as a receiving port, through which the BMC 2 carried out of the storage box 6 is housed in the conveying box 71 and at which doors 75a, 75b and 75c are respectively provided so as to be pivoted to an upper stage, a middle stage and a lower stage. The conveying box 71 of a conveyer 7, in which the BMC 2 carried out of the storage box 1 is raised so as to convey the BMC 2 to a shifter 5 in order to charge the BMCs 2... in a hopper 4a by opening an on-off lid 56 on the feed opening side of the shifter 5.