A process unit and methods are disclosed. One process unit including a pultrusion unit having a pultrusion channel, with the pultrusion channel being limited by at least one shaping wall. The process unit further includes an extrusion unit having an extrusion channel and an opening for removing the extrudate out of the extrusion channel, a cutting unit having a moving cutting element for cutting off the extrudate with the moving cutting element, and a conveying device for conveying a raw extrudate from the pultrusion unit into the extrusion unit. The cutting unit comprises a component that can be caused to move in a rotational manner and the component is mechanically coupled to the cutting element by a mechanical coupling device, such that the rotational movement of the component determines the movement of the cutting element.

One example provides a process unit including a conveying device to convey a hybrid yarn comprising a plurality of fibers and a matrix through a channel bounded by a base body, and a cutting unit having a component configured as a sleeve mounted about the base body, the sleeve rotatable about the base body and including a circular recess at an axial end region which is eccentrically aligned with an axis of rotation of the sleeve, and a cutting element on a slide slidably mounted to the base body and disposed within the circular recess, wherein the slide rests on a support surface of the sleeve bounding the circular recess so that, due to the circular recess being eccentrically aligned with the axis of rotation, a rotational movement of the sleeve causes translational movement of the slide and the cutting element across the channel to cut the hybrid yarn.

One example provides a process unit including a conveying device to convey a hybrid yarn comprising a plurality of fibers and a matrix through a channel bounded by a base body, and a cutting unit having a component configured as a sleeve mounted about the base body, the sleeve rotatable about the base body and including a circular recess at an axial end region which is eccentrically aligned with an axis of rotation of the sleeve, and a cutting element on a slide slidably mounted to the base body and disposed within the circular recess, wherein the slide rests on a support surface of the sleeve bounding the circular recess so that, due to the circular recess being eccentrically aligned with the axis of rotation, a rotational movement of the sleeve causes translational movement of the slide and the cutting element across the channel to cut the hybrid yarn.

The present invention is directed to a method and a system for the production of at least one polymeric yarn comprising means for mixing a polymer (1) with a first solvent yielding a mixture; means for homogenizing the mixture; means for rendering the mixture inert (21, 22, 23); means for dipping the mixture into a quenching bath (30), wherein an air gap is maintained before the mixture reaches the quenching bath (30) liquid surface forming at least one polymeric yarn; means for drawing (41) the at least one polymeric yarn at least once; means for washing (5) the at least one polymeric yarn with a second solvent that is more volatile than the first solvent; means for heating the at least one polymeric yarn (6); means for drawing at room temperature (7) the at least one polymeric yarn at least once; and means for heat drawing (8) the at least one polymeric yarn at least once. The instant invention also concerns a system and method of dosing a polymer mixture with a first solvent into an extruder (26), a device (5), a system and a method of solvent extraction from at least one polymeric yarn, and a method and system of mechanical pre-recovery (4) of at least one liquid in at least one polymeric yarn.

The present invention is directed to a method and a system for the production of at least one polymeric yarn comprising means for mixing a polymer (1) with a first solvent yielding a mixture; means for homogenizing the mixture; means for rendering the mixture inert (21, 22, 23); means for dipping the mixture into a quenching bath (30), wherein an air gap is maintained before the mixture reaches the quenching bath (30) liquid surface forming at least one polymeric yarn; means for drawing (41) the at least one polymeric yarn at least once; means for washing (5) the at least one polymeric yarn with a second solvent that is more volatile than the first solvent; means for heating the at least one polymeric yarn (6); means for drawing at room temperature (7) the at least one polymeric yarn at least once; and means for heat drawing (8) the at least one polymeric yarn at least once. The instant invention also concerns a system and method of dosing a polymer mixture with a first solvent into an extruder (26), a device (5), a system and a method of solvent extraction from at least one polymeric yarn, and a method and system of mechanical pre-recovery (4) of at least one liquid in at least one polymeric yarn.

The disclosure relates to a method for producing an extruded sheet, which includes: a) providing calcium carbonate (CaCO.sub.3) powder; b) providing polyvinyl chloride (PVC) powder; c) providing additives as stabilisers, e) heating the mixture until the PVC softens to form a kneadable mass and the CaCO.sub.3 at least partially bonds to the PVC; f) cooling the mass; g) conveying the mass to an extruder; h) melting and extruding the mass by means of an extruder and moulding into a sheet by means of a slotted nozzle; i) pressing the still-warm sheet to a desired final thickness by means of at least two calendar rolls; and j) at least one layer of a pigmented lacquer is applied to the upper side; and k) an additional lacquer is applied to the pigmented lacquer to increase the scratch resistance.

A feeder for an extruder includes a feed flow passage extending in an axial direction from a feeder inlet to a feeder outlet, and an axially extending rotatable screw provided in the feed flow passage. Rotation of the screw draws a feedstock in a direction of flow to the feeder outlet. The feeder inlet has an inlet passage that overlies the screw. The inlet passage has a width in a plane transverse to the axial direction, and the width decreases in the direction of flow.

The present invention is directed to a method and a system for the production of at least one polymeric yarn comprising means for mixing a polymer (1) with a first solvent yielding a mixture; means for homogenizing the mixture; means for rendering the mixture inert (21, 22, 23); means for dipping the mixture into a quenching bath (30), wherein an air gap is maintained before the mixture reaches the quenching bath (30) liquid surface forming at least one polymeric yarn; means for drawing (41) the at least one polymeric yarn at least once; means for washing (5) the at least one polymeric yarn with a second solvent that is more volatile than the first solvent; means for heating the at least one polymeric yarn (6); means for drawing at room temperature (7) the at least one polymeric yarn at least once; and means for heat drawing (8) the at least one polymeric yarn at least once.

The instant invention also concerns a system and method of dosing a polymer mixture with a first solvent into an extruder (26), a device (5), a system and a method of solvent extraction from at least one polymeric yarn, and a method and system of mechanical pre-recovery (4) of at least one liquid in at least one polymeric yarn.

The present invention is directed to a method and a system for the production of at least one polymeric yarn comprising means for mixing a polymer (1) with a first solvent yielding a mixture; means for homogenizing the mixture; means for rendering the mixture inert (21, 22, 23); means for dipping the mixture into a quenching bath (30), wherein an air gap is maintained before the mixture reaches the quenching bath (30) liquid surface forming at least one polymeric yarn; means for drawing (41) the at least one polymeric yarn at least once; means for washing (5) the at least one polymeric yarn with a second solvent that is more volatile than the first solvent; means for heating the at least one polymeric yarn (6); means for drawing at room temperature (7) the at least one polymeric yarn at least once; and means for heat drawing (8) the at least one polymeric yarn at least once.

The instant invention also concerns a system and method of dosing a polymer mixture with a first solvent into an extruder (26), a device (5), a system and a method of solvent extraction from at least one polymeric yarn, and a method and system of mechanical pre-recovery (4) of at least one liquid in at least one polymeric yarn.

An apparatus for producing an object from a polymeric material having a melting temperature comprises: a melting device for melting the polymeric material, a heat exchanger for cooling the polymeric material melted by the melting device below the melting temperature, a mould arranged downstream of the heat exchanger for forming the object from the polymeric material, while the polymeric material has a temperature lower than said melting temperature, a heat recovery device associated with the heat exchanger, the heat recovery device being configured to recover at least part of the heat released by the polymeric material to the heat exchanger.