Device for the granulation of a plastic molding compound which does not flow under gravity and the use of an extruder

US5158730A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Hubert Pawelczyk · Goldkronach, DE
• Franz-Josef Carduck · Haan, DE

Key dates

• Filing date: May 20, 1991
• Grant date: Oct 27, 1992
• Expiry date: May 20, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S425/23
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

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.degree. to 65.degree. C. relative to the horizontal.