Buss Ag

Coperion Buss Ag

Peter Franz

Hans-Ulrich Siegenthaler

Joel Stampfli

Hans Seipp

Werner Wehrli

Bernd Roese

A mixing and kneading machine () for continual compounding comprises a screw shaft () rotating in a casing () and simultaneously moving axially translationally. To sustainably enhance the efficiency of the machine as regards its material thruput per unit of time the screw shaft () comprises at least four groups of radial screw vanes () evenly distributed circumferentially, each group consisting of a plurality of screw vanes in axial sequence. The outer diameter (Da) of the screw shaft ranges from 400 to 800 millimeters. The rotary speed of the screw shaft () ranges from 30 to 80 rpm. A mixing and kneading machine () engineered as such is particularly suitable for compounding an anodic mass in the production of electrodes&#x2014;anodes&#x2014;for the aluminum industry.

Mixing and kneading machine for continual compounding and method of implementing continual compounding by means of a mixing and kneading machine

The invention provides a packing assembly for rotating and/or oscillating machine shafts arranged in a machine housing. The packing assembly comprises a packing accommodation unit floating on said shaft. The packing accomodation unit is supported on the housing by means of a ball joint assembly that is pivotable and translatory movable in a radial direction to and from the shaft. The ball joint assembly comprises a ball member provided with a central bore received in a ball socket. A guiding element projecting into the bore of the ball member serves for translatory guiding the ball member along the axis of the bore in the ball member, whereby the axis of the bore on the ball member runs essentially perpendicular to the central longitudinal axis of the shaft.

Packing assembly

Procedure for the continuous production of free flowing and homogenous

A continuous process for carrying out the process for preparing substantially dust-free thermoset plastic particles from soft plastic mixtures of reactive thermoset plastic-forming materials and volatile components. These soft mixtures which quickly harden after drying are extruded under low pressure and are granulated by cutting while soft. To eliminate excessive amounts of dust the invention uses a premixer and a worm conveyor in a special housing and the conveyor flights are at a low angle of inclination to the horizontal to extrude the soft mixture at low pressure. The soft material at the outlet of the special material is pushed out of the nozzle under a worm rotation which is less than 25 r.p.m. and a pressure is of the order of one pound after which the material is conveyed pneumatically to a cooling station to harden and after cooling is cut into uniform size particles by knives without the formation of dust.

Process for preparing dust-free particles

A process for preparing fusible, crosslinkable resinous intermediates of polyaddition and polycondensation resins consisting essentially of continuously proportioning and feeding a resin precursor composition in solid and liquid form, in a mixing and kneading machine, intensively mixing the resin precursor composition in both the longitudinal and transversal directions and simultaneously heating said composition, thereby plasticizing and homogenizing the same below the temperature of cross-linking and hardening and at a temperature of 50.degree.-90.degree. C during a brief average dwell time in the mixing chamber of said machine which will prevent excessive stiffening of the mixture in the form of a pasty mass to thereby plug the machine, continuously expelling the plasticized intermediate resin mix at a temperature of 50.degree. to 90.degree. C in the form of a pasty mass through a hollow die with twin conical outlet heated to a temperature of not more than 50.degree. C. The intermediate resin mix which is expelled is cooled, solidified, preformed by a pair of rollers into a strand which is friable and is adapted to be broken by up grinding to form a powdered intermediate.

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Birsfelden, Switzerland

Peter Franz