A PROCESS FOR GRANULATING A PLASTIC MOULDING COMPOUND WHICH IS NOT FLUID UNDER THE EFFECT OF GRAVITY AND THE USE OF AN EXTRUDER

• Main Authors: CARDUCK, FRANZ-JOSEF, PAWELCZYK, HUBERT
• Format: Patent
• Language: English; German
• Published: 05.04.1990
• Edition: 5
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; CANDLES; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; DETERGENT COMPOSITIONS; DETERGENTS; FATTY ACIDS THEREFROM; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MAKING GRANULES OR PREFORMS; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF GLYCEROL; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; RESIN SOAPS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SOAP OR SOAP-MAKING; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; THEIR RELEVANT APPARATUS; TRANSPORTING; USE OF SINGLE SUBSTANCES AS DETERGENTS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention relates to an extruder with a granulating head for granulating a plastic moulding compound which is not fluid under the effect of gravity, especially an enzyme concentrate usable for detergents, to form a granulate with a maximum grain size of 1 mm and especially 0.8 mm. In order to ensure that the moulding compound to be processed is uniformly distributed over the entire cross-section of the moulding die, it is proposed that the granulating head be fitted with a nozzle holder (1) on the outside, with perforated discs, a displacement cone (2) arranged behind it and a predistributor (3) in the form of a perforated plate and arranged between the nozzle holder (1) and the displacement cone (2). In addition, the nozzle holder is to have through-holes with a perforated disc fitted at the forward end of each in which the perforations have a rear region with a larger cross-section and a forward region with a smaller cross-section, while the transition region between the forward and rear regions is inclined at an angle of 55 to 65 DEG relative to the longitudinal axis of the perforation. L'invention concerne une extrudeuse pour la granulation d'une matière plastique moulable ne s'écoulant pas par gravité, en particulier d'un concentré d'enzymes utilisable pour des détergents, en vue de l'obtention de grains d'une granulométrie de 1 mm maximum, et de préférence de 0,8 mm maximum, au moyen d'une tête de granulation. Pour obtenir une distribution uniforme de la matière moulable à transformer, sur toute la section de la plaque de façonnage, il est proposé que la tête de granulation comporte à l'extérieur un support des plaquettes de la buse (1) portant des disques perforés, un cône de refoulement (2) monté à l'arrière dudit support, et un prédistributeur (3) constitué par une plaque perforée, monté entre le support de plaquettes (1) et le cône de refoulement (2). En outre, le support de plaquettes présente des orifices de passage ayant chacun un disque perforé monté à leur extrémité avant, dont les perforations présentent un région arrière de plus grande section et une région avant de plus petite section, la zone de transition entre les zones arrière et avant étant inclinée de 55 degrés à 65 degrés par rapport à l'axe longitudinal des perforations.