A mixing device is provided for a closed resin infusion process. The mixing device includes a bulk mixing head with a mixing cavity, at least two separate non-return valves for opening and closing a respective channel for providing material to be mixed running into the mixing cavity. A removable flange is provided for closing the mixing cavity comprising a fitting for mounting the mixing device to a static mixer. At least one heating element is provided for curing the hardable material mixture in the mixing cavity if need be.

Device for cleaning an extruder intended to operate with elastomeric mixtures comprising a frame (11) supporting a screw (2) and a barrel (1), the screw (2) being made to rotate about the longitudinal axis (X-X) of the barrel (2) when it is rotationally driven by drive means, the barrel comprising an elastomeric-mixture feed inlet (3) and an outlet (4) opening directly into an extrusion die (21) mounted on a support (20).

According to the invention, the frame (11) is mounted with the ability to move translationally with respect to the die (21) support (20) in a direction parallel to the longitudinal axis X-X between a first position in which the barrel (1) and the die (21) are in sealed contact to allow the elastomeric mixture to pass through the die (21) and a second position in which the barrel (1) is moved away from the die (21) in order to perform cleaning, the parting line between the barrel (1) and the die being substantially axisymmetric with respect to the axis X-X and in that the said device comprises an automatic coupling mechanism (40) for quickly locking and unlocking the barrel (1) and the die (21) and allowing the frame (11) to move between the two positions.

An extrusion device that produces plastic film includes at least two feed units that feed feedstock for an extruder, wherein, in each feed unit an automatic cleaning device is arranged for a removal of feedstock from the feed unit when changing material in the extrusion device.

An apparatus for removing material residue from an external mixing element as it is being withdrawn from an external vessel containing the material mixed by the mixing element. The apparatus includes a stationary support member, a repositionable support assembly, and a rotatable material stripping element held captive by at least one element of the repositionable support assembly.

A screw to be used in an extruder has a modular structure so that it can be adapted very flexibly to new tasks and conditions. The modular structure of a screw contains a rod-shaped mandrel and individual screw components which are slidable onto the mandrel. The components perform the classic functions of the screw during the extrusion process, such as conveying, kneading, mixing or shearing of the plastic to be guided into and through the plant.

For transmission of the occurring high torque, the components are connected with the mandrel so that they positively engage and are axially braced in addition. The connection is to be performed such that it can be released by simple means.

In a kneading extrusion apparatus according to an embodiment, when an extruder is started in order to manufacture a resin compound, an amount of a resin raw material to be supplied is increased with an increase in a rotation speed of a screw of the extruder based on a predetermined starting-time supply pattern for the resin raw material, and a supply of the filler is started after the supplying of the resin raw material is started and an amount of the filler to be supplied is increased with the increase in the rotation speed of the screw based on a predetermined starting-time supply pattern for a filler.

A device for carrying out mechanical, chemical, and/or thermal processes in a housing (3), comprising mixing and cleaning elements (5) on at least two shafts (1, 2), the mixing and cleaning elements (5) on the shafts (1, 2) meshing with each other and being equipped with disk elements that include kneading bars. The number of disk elements including kneading bars is adjusted to the speed ratio between the shafts.

The present invention relates to a process for devolatilising polymer-containing media such as, in particular, polymer melts, polymer solutions and dispersions and also devolatilisation apparatuses for carrying out the abovementioned process.

An injection tube assembly comprising: a hollow cylindrical tube; a rotatable material stripping element, and a nozzle. Also, a polymer mixing system comprising: an injection tube assembly, a support apparatus for the injection tube assembly; a mixing apparatus; and if desired, an injection molding apparatus to produce an injection molded part with the mixed material.

A mixing tool with an integrated stripping element for removing material residue from its embodied mixing element.