Door melt mass adjusting device of pugging and extruding pelletizer

The invention relates to a novel adjusting device for fused mass mixing degree, in particular to a door type fused mass adjusting device of a continuous mixing extruding granulating set. The adjusting device mainly consists of a lower door body and an upper door body; the upper door body and the lower door body are respectively connected with an opening-closing drive device; the drive device drives the upper door body and the lower door body to simultaneously move to the same direction or move oppositely. The device of the invention is matched to be used with the continuous mixing extruding granulating set and can be mounted between two sections of machine cylinders vertically or in a certain angle. The control on the opening and closing as well as the opening and closing degrees of the door bodies is obtained by utilizing the principle that the upper and the lower bodies which are symmetrically arranged are simultaneously moved to the same direction or oppositely to change the passing-through area of the materials; thereby changing the mixing degree of a mixing system. The device of the invention has the advantages that the mechanical structure is simple and compact, the processing and manufacture costs are low, the installation and the maintenance are convenient as well as adjustment and detection are convenient; cooled water is accessed into the door bodies to carry out cooling on the fused mass, thus realizing self seal of the fused mass; the seal is reliable and impurities are reduced.