A filter element for filtering a fluid comprises a first clamping ring with an outer ring; a first filter disk; a first inner support plate for supporting the first filter disk and which faces to the outside or to an inner flow channel; a second inner support plate provided with recesses; a second filter disk arranged adjacent the second inner support plate; and a second clamping ring which is connected to the first clamping ring by connecting elements. The filter disks and the inner support plates are arranged inside a housing which is formed by the clamping rings, by at least one outer ring and by outer support plates provided with recesses and covering the filter disks on the outside.

Techniques involve cleaning a polymer melt, which allow volatile foreign substances and solid foreign substances to be removed from the polymer melt. Such techniques involve a filter element and a vacuum of a vacuum chamber. The polymer melt is fed through the filter element into the vacuum of the vacuum chamber, The filter element binds the solid foreign substances and the vacuum chamber takes up the volatile foreign substances.

Techniques involve cleaning a polymer melt, which allow volatile foreign substances and solid foreign substances to be removed from the polymer melt. Such techniques involve a filter element and a vacuum of a vacuum chamber. The polymer melt is fed through the filter element into the vacuum of the vacuum chamber, The filter element binds the solid foreign substances and the vacuum chamber takes up the volatile foreign substances.

The invention pertains to an injection molding machine comprising, an injection nozzle (2) having a melt channel (6), an injection opening (5), and a filter (9) for filtering the molten resin within the injection nozzle (2). According to the invention, the melt filter (9) cooperates with the 5 melt channel (6) or a means (7) provided within the melt channel (6) in such a way, that during an injection phase of the injection molding machine, the molten resin is caused to pass through the filter (9), and during a decompression phase of the injection molding machine the molten resin is caused to bypass the filter (9).

Embodiments of an invention disclosed herein relate to devices, processes, and systems for processing polymers.

The present disclosure relates to a facility for forming a wood plastic composite by mixing and extruding wood powder and a polymer resin. According to a facility of the present disclosure, in a process of forming a wood plastic composite, gas and water vapor contained in wood powder and polymer resin are efficiently removed, and thus, a coupling force between wood powder and polymer resin increases, and also, wood powder is uniformly dispersed inside polymer resin, and thus, physical properties of a wood plastic composite to be formed is not degraded, and in addition, since there is no stagnant section while molten liquid of wood powder and polymer resin passes through each apparatus in the facility, wood powder is prevented from carbonizing or polymer resin is prevented from solidifying, and thus, physical properties of the wood plastic composite to be formed are maintained constant.

A device for continuously filtering material mixtures, particularly for separating contaminants out of plastic melts, includes a filter (3), which is rotatably arranged in a filter chamber (2) of a housing (1), at least one wiper (17) for lifting off contaminants retained by the filter (3), and a discharge device (18) for removing the contaminants lifted off the filter (2) by the wiper (17) from the housing (1). The discharge device (18) includes a discharge shaft (19), which is rotatably arranged at the housing (1) and which has at least one continuous opening (20) having at least one piston (22) which is movably guided therein.

Techniques recycle plastics in multiple successive process steps. A polymer, preferably a recyclable material, is melted using a discharge extruder, filtered using a first filter device under a positive pressure atmosphere, filtered and degassed using a degassing device, and discharged using a discharge extruder. The degassing device has at least one filter element and a vacuum chamber with a negative pressure atmosphere for filtering and degassing purposes, wherein the plastic melt can be conducted into the negative pressure atmosphere of the vacuum chamber through the filter element.

A filter unit for an extruder assembly comprises a support body with a hollow cylindrical wall section and a base section connected thereto, wherein the support body has a central longitudinal axis and delimits an inner space, wherein the hollow cylindrical wall section has a plurality of through openings opening into the inner space and forms an outlet opening for a molten plastic opposite the base section; and a displacement element for displacing the molten plastic which has entered the inner space, in particular via the through openings, substantially in the direction of the central longitudinal axis, wherein the displacement element and the support body are configured and/or produced in one piece, as well as filter arrangement with a plurality of such filter units, filter changing device with at least two filter arrangements and method for producing such a filter unit.

Embodiments of an invention disclosed herein relate to devices, processes, and systems for processing one or more polymers.