Mixing kneader

US5121992A · kind A · utility

Assignee

• LIST AG · CH

Inventors

• Jorg List · Pratteln, CH
• Walther Schwenk · Pratteln, CH
• Alfred Kunz · Muttenz, CH

Key dates

• Filing date: Oct 4, 1990
• Grant date: Jun 16, 1992
• Expiry date: Oct 4, 2010

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01F27/707
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a mixing kneader for the mechanical and/or thermal treatment of products, there is a shaft (16) arranged in a housing (1), on which shaft disk segments (21) are avoided distributed in the axial direction. In the kneading spaces (24) between the disk segments (21) there are fixed kneading counter-elements (27), which clean the disk segments (21) and shaft (16) and comprise a section (30), running close to the disk segments (21), and an arm (31), running close to the circumferential surface (37) of the shaft (16). In order that the section and the arm can give way to excessive product encrustations on the shaft, a center line (N) of the section (30) close to the disk segments (21) is to run at an inclination, in the direction of rotation (Z) of the shaft (16), corresponding to a secant through the shaft (16). Something similar also applies to the center line (O) of the arm (31) and to a leg (28) adjoining the section (30) at the other end from the arm (31). This has the effect that the formation of product bridges is also provided and the product conveyance and mixing action are improved. In addition, the mechanical stressing of the kneading element and the taking up of torque by …