An extrusion device is provided. The extrusion device includes an extrusion die having a die bushing comprising a channel extending to an opening of the die bushing, a die pin positioned in the channel, and at least one die pin support feature extending between the die pin and the die bushing.

A nozzle arrangement for a granulator has a nozzle body with an inlet side as well as an outlet side, a nozzle plate with nozzle holes arranged on the outlet side for forming melt strands, and flow channels formed in the nozzle body and connected to the inlet side and the outlet side in a fluid-conducting manner for supplying a melt flow to a nozzle plate. An annular connection channel connects a plurality of flow channels in a fluid-conducting manner. A method for separating a melt flow into melt strands is also described.

A modular disk coextrusion die is formed of a plurality of cells stacked together. Each cell includes a symmetrical arrangement of thin annular disks, including a central routing disk and two distribution disks on both sides of the central routing disk. The distribution disks are oriented so that their respective distribution inlet openings oppose each other by about 180 degrees. The symmetrical arrangement permits each cell to process the melt streams in a manner that provides enhanced layer uniformity and bubble stability. By stacking several cells, blown films having up to several hundred layers can be made using twelve, twenty-four or more polymer melt streams.

A tyre strip extrusion apparatus includes extruders and an extrusion head which includes a head housing having feed openings respectively connected to the extruders for feed of extrusion material. An injection moulding tool is connected to the head housing and includes a profile plate formed with an outlet opening which communicates with the feed openings for extrusion material to flow from the feed openings to the outlet opening for extruding a web from the extrusion material. Bearing against the head housing along a first parting surface is a first distributor plate. A second distributor plate is arranged upstream of the profile plate in flow direction of the extrusion material. The first distributor plate bears along a second parting surface against the second distributor plate. The first and second distributor plates are configured such that at least a majority of the material paths runs through the first and second parting surfaces.

A die structure is provided. The die structure may have a die body, a mandrel having a magnet and/or one or more magnet assemblies, a first magnetic structure, a second magnetic structure and/or one or more magnetic structures. The first magnetic structure may be configured to apply a first magnetic force to the mandrel, in a first direction. The second magnetic structure may be configured to apply a second magnetic force to the mandrel, in a second direction opposite the first direction. The one or more magnetic structures may be configured to apply one or more magnetic forces to the mandrel. Application of the first magnetic force, the second magnetic force and/or the one or more magnetic forces to the mandrel supports the mandrel to be levitated within the die body and/or causes the mandrel to rotate and/or to maintain a position within the die body.

An extrusion device including at least one extruder having a screw cylinder, a screw shaft rotatably supported in the screw cylinder and an extruder outlet, an injection mould having an outlet nozzle determining the cross-sectional contour of the extruder, and an extrusion head arranged between the extruder outlet of the at least one extruder and the outlet nozzle of the injection mould, wherein at least one perforated plate arranged in the extruder head is provided, which has a plurality of passage openings, wherein the passage openings are designed to dam up extrusion material conveyed from the at least one extruder through the passage openings of the perforated plate differently into at least one first region of the perforated plate and at least one second region of the perforated plate, in such a way that the extrusion material is partly diverted from its preferential direction within a central section of the perforated plate, specifically increasingly into at least one edge section of the perforated plate.

The disclosure relates to an extruder head for extruding cord reinforced extrudate, wherein the extruder head includes a die and a cord guide, wherein the extruder head further includes a first flow channel that extends along a first flow path through the extruder head at and debouches into the die from a first side of a cord plane and a second flow channel that extends along a second flow path through the extruder head at and debouches into the die from a second side of the cord plane, wherein the first flow path and the second flow path each include a supply section and a coat-hanger section, wherein the first flow path and the second flow path, in their respective coat-hanger sections, extend within a first range of eighty-five to ninety-five degrees with respect to the cord plane along at least seventy percent of the coat-hanger sections.

Provided is a rubber-coated cord manufacturing technique with which the occurring of rubber spew can be prevented and waste in the form of scrap can be reduced during a rubber-coated cord manufacturing step, and with which the burden on an operator can be reduced and a high-quality rubber-coated cord can be stably produced. This rubber-coated cord manufacturing device comprises: an extrusion head that coats rubber on the surface of a cord, the extrusion head including a screw rotation type extruder which extrudes rubber, an insertion port into which the cord is inserted, and a flow path of rubber which has been extruded from the extruder; a cord supply device that supplies the cord to the extrusion head; a rubber-coated cord winding device that winds a rubber-coated cord which has been coated with rubber by the extrusion head; and a head pressure controller that controls the head pressure of the extrusion head. The head pressure controller performs control to maintain the head pressure at a prescribed level by feeding back to the extruder the monitoring results of the head pressure while the cord is coated with the rubber, and adjusting the rotation speed of the screw.

A device for cleaning an extruder includes a frame that supports a screw and a barrel. When driven by a driver, the screw is rotatable about a longitudinal axis of the barrel. The barrel includes a feed inlet and an outlet that opens directly into an extrusion die mounted on a support. The frame is translationally movable relative to the die and the support in a direction parallel to the longitudinal axis between a first position, in which the barrel and the die are in sealed contact, and a second position, in which the barrel is moved away from the die in order to allow cleaning to be performed. The device also includes an automatic coupling mechanism that enables quick locking and unlocking of the barrel and the die, so that the frame can move between the first and second positions when the barrel and the die are unlocked.

A modular disk coextrusion die is formed of a plurality of cells stacked together. Each cell includes a symmetrical arrangement of thin annular disks, including a central routing disk and two distribution disks on both sides of the central routing disk. The distribution disks are oriented so that their respective distribution inlet openings oppose each other by about 180 degrees. The symmetrical arrangement permits each cell to process the melt streams in a manner that provides enhanced layer uniformity and bubble stability. By stacking several cells, blown films having up to several hundred layers can be made using twelve, twenty-four or more polymer melt streams.