A silicone extrusion plant has a silicone extruder and a silicone feed device configured to load the silicone extruder. The silicone feed device has a feed hopper. The feed hopper opens into a feed opening at the bottom thereof. The feed opening is in a fluidic connection, via a feed duct, with an inlet zone of the silicone extruder. A feed screw arranged in the feed hopper in such a way as to be drivable for rotation protrudes into the feed opening at least partly. The feed screw has a cone portion and a cylinder portion. According to another aspect, the silicone extrusion plant has at least one feed pressure sensor configured to measure an actual feed pressure of silicone material to be extruded. A control unit is in a signal communication with the feed pressure sensor and a feed drive device in order to drive the silicone feed device.

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.

The invention is a weigh ng and mixing system for the preparation of mixtures of components required by processing machines for the manufacture of plastic products. In particular the invention is suitable for the preparation of weighed mixtures comprised of at least two different masterbatches in order to obtain the color shade desired for a specific plastic product.

Provided is a three-dimensional modeling material used for a fused deposition modeling three-dimensional printer. The three-dimensional modeling material has a multilayer structure and contains, in respective different layers, a thermoplastic resin (A) having a shear storage elastic modulus (G) of 1.0010.sup.7 Pa or less as measured at 100 C. and 1 Hz and a thermoplastic resin (B) having a shear storage elastic modulus (G) of more than 1.0010.sup.7 Pa as measured at 100 C. and 1 Hz.

The invention is a weighing and mixing system for the preparation of mixtures of components required by processing machines for the manufacture of plastic products. In particular the invention is suitable for the preparation of weighed mixtures comprised of at least two different masterbatches in order to obtain the color shade desired for a specific plastic product.

A controlled, variable speed vacuum pump with a flow limiter connected to the suction head of the vacuum pump conveys granular plastic resin material from a supply to receivers retaining and dispensing resin when needed by a process machine.

Thermoplastic compositions useful for roadway markings may be produced using a continuous systems and process methods that can reduce costs and improve product quality. Systems may comprise a feed system comprising a plurality of feeders and a mixing system comprising a mixer and a smoothing system. Each feeder may be configured to discharge a material at a feed rate according to a selected product formulation The mixing system may be configured to receive, heat, and combine the materials to produce a thermoplastic material, and discharge the thermoplastic material at a determined discharge rate.

A method and an apparatus manufactures and tests workpieces. The apparatus is mountable on or includes a system for mixing or melting materials. The apparatus includes application units and a replacement system that is designed to automatically replace application units in respect of the position or function thereof.

A spinneret assembly for spinning polymeric fibers, including: (a) a cap provided with an inlet port and a flared lower surface that flares outwardly from the inlet port in the direction of flow; (b) a spinneret having numerous spinning flow channels through its thickness; (c) a filter freely resting on the spinneret; and (d) a flow guide with a tapered geometry mounted in a cavity defined by the cap and the spinneret. The flow guide has an apex facing the inlet port, a base facing the filter, and one or more side surfaces tapering up to the apex. A diverging flow passage is defined by the tapering side surface(s) of the flow guide and the cap's flared lower surface. The base of the flow guide is spaced apart from an upper surface of the spinneret, creating a space that is in fluid communication with the divergent flow passage.

A system for making polymeric fibers can comprise a main extruder configured to receive a polymer feedstock composition. The main extruder can have an outlet in fluid communication with a transfer line configured to receive a polymer melt from the main extruder and transfer the polymer melt in a flow direction that is towards a spinneret. A side arm extruder assembly can be positioned along the transfer line between the main extruder and the spinneret. The side arm extruder assembly can comprise an outlet positioned within the transfer line to inject a colored polymer melt concentrate into the transfer line.