An extruder assembly has a frame with upstream and downstream ends. A barrel assembly on the frame has a passage. At least one material advancing component resides at least partially within the passage and is configured to be turned around an operating axis to thereby cause material to be conveyed from a passage inlet to a passage outlet. A drive assembly turns the at least one material advancing component around its operating axis and has a motor on the frame situated so that at least a part of the motor is in lengthwise overlapping relationship with the barrel assembly. The drive assembly is configured to turn the one material advancing component around its operating axis at a speed of at least 300 rpm.

Extrusion die systems, die changers and related methods are provided herein. The die changer for changing of dies in and out of an extrusion line can include a housing having a main supply feed bore therethrough for directing, a flowable material and a channel oriented transversely to the main supply feed bore. The die changer can include a slide plate movable through the channel and transverse to a direction of flow through the bore. The slide plate can include an elongate body having a first section and a second section. A first bore can extend through the first section of the elongate body of the slide plate and a second bore can extend through the second section of the elongate body of the slide plate. The slide plate of the die changer can be moved within the channel of the housing between a first position where the first bore in the first section of the elongate body of the slide plate is aligned with the main supply feed bore and a second position where the second bore in the second section of the elongate body of the slide plate is aligned with the main supply feed bore.

An extrusion device that produces plastic film includes at least two feed units that feed feedstock to an extruder, wherein each feed unit has at least one discharge opening including a discharge closure to open and close the discharge opening, and a container interface that reversibly fastens a discharge container that accommodates feedstock discharged from the respective feed unit.

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.

A coextrusion feedblock is disclosed having a housing, a central extrusion channel, a coextrusion channel, a rotatable combining plane, a rotatable profile actuator, and a profiled bar mounted removably on the rotatable profile actuator. The central extrusion channel and the coextrusion channel pass through the housing. The rotatable combining plane and the rotatable profile actuator are positioned on opposite sides of the coextrusion channel so as to confront each other.

Methods for altering feed throat passageway size, shape and position in a pellet fed extruder by means of a removable adapter are disclosed. Adapters chosen for optimal extrusion performance may be removed with little effort in a shorter time and may be more cost effective than other methods for optimization of extrusion including replacing the screw or by replacing the feed throat through purchase of a different extruder.

The invention provides a carbon-neutral biaxially stretched polyamide film containing a raw material derived from biomass and having high heat-resistance, impact resistance, and folding pinhole resistance, as well as decreased variability in a degree of biomass in the mechanical (longitudinal) direction. The biaxially stretched polyamide film roll contains biaxially stretched polyamide film containing 70-99% by mass of polyamide 6 resin and 1-30% by mass of a polyamide resin in which at least a part of a raw material is derived from biomass, wherein the film roll has a winding length of from 1,000 m to 60,000 m, a width of from 400 mm to 3,000 mm, and variability in a degree of biomass of 15% or less based on radiocarbon .sup.14C measurement of a biaxially stretched polyamide film sample taken from a surface to a core of the film roll at an interval of 1000 m in an MD direction.

A feeding device for feeding fluff and granules into an extruder includes a supplying apparatus with an outlet-side pipe piece for the granules, with which the granules can be fed while forming a granule column, the pipe piece being connected to an inlet opening of the extruder, a funnel with a funnel outlet for supplying fluff, an auger being provided within the funnel for conveying fluff, which projects through the funnel outlet and into the pipe piece, the fluff being conveyable within the granule column, and the auger being configured to be a double-start and so as to also convey parts of the granules and/or to compact the fluff with a compacting device.