device for granulating plastic formmasse which is liquid under the influence of gravity and the use of an extruder

摘要

PCT No. PCT/EP89/01062 Sec. 371 Date May 20, 1991 Sec. 102(e) Date May 20, 1991 PCT Filed Sep. 12, 1989 PCT Pub. No. WO90/03217 PCT Pub. Date Apr. 5, 1990.This invention relates to an extruder having a granulating head for the granulation of a plastic molding compound which does not flow under gravity, more particularly an enzyme concentrate suitable for detergents, to granules having a particle size of at most 1 mm and, more particularly, at most 0.8 mm. To obtain uniform distribution of the molding compound to be processed over the entire cross-section of the molding plate, the granulating head has an externally arranged die plate support carrying perforated disks, a displacement cone arranged behind the die plate support and a preliminary distributor in the form of a perforated plate arranged between the die plate support and the displacement cone. In addition, the die plate support has bore-like passages each with a perforated disk which is arranged at the front end thereof and of which the bores have a rear zone of relatively large cross-section and a front zone of relatively small cross-section, the transitional zone between the rear zone and the front zone being inclined at an angle of 55 DEG to 65 DEG C. relative to the horizontal.