JPS5768300A - Rolling compactor - Google Patents

Abstract

PURPOSE: To prevent sliding between powdery raw material and roll, thus to solidify said material into the high density, and to improve the productivity by rolling said material with an upper and a lower rolls having unevenness on the surfaces while deaerating said material compressively with a screw feeder.

CONSTITUTION: Powdery raw material of which mixing has been finished is supplied to a hopper 1 and is so agitated with an arch braker 2 as to prevent generation of the crosslinking state of said material and, further, air remaining in the raw material is deaerated, then the raw material is fed into a screw feeder 3. Thereupon, the raw material is extruded foreward through the rotation of the screw and, at the same time, air still remaining in the material is made to flow backward for the hopper 1 or to exclude from an uper and a lower seals 4 and side seals 5. Then, the material which is deaerated and is extruded with the feeder 3 is rolled with an upper and a lower rolls 6, 6. At this time, sliding brtween the rolls and the raw material is prevented through plural grooves 9 which are parallel to mandrel of the roll or the textured rolls having ≥50S surface roughness which are provided onto the surface of both the upper and the lower rolls, thereby, the bite of rolls for the raw material increases; thus, the raw material is extruded forming into strip and, is formed into granules having a prescribed grain size.

COPYRIGHT: (C)1982,JPO&Japio