A plug screw feeder (1) comprises a plug screw (10) with a thread (12) and a plug screw housing (20) surrounding the plug screw. The plug screw housing comprises an inlet opening (24) in a side of the plug screw and in a vicinity of a first axial end (18) of the plug screw. The plug screw is arranged for feeding lignocellulosic biomass material (99) from the inlet opening to a second axial end (19) of the plug screw when being rotated. The thread, in at least a part of an inlet section (15) of the plug screw, presents a jagged peripheral rim (14A) with an inwards directed leading edge. The inlet section is defined as the section of the plug screw passing the inlet opening during rotation. A feeding arrangement and system for treatment of lignocellulosic biomass material comprising such a plug screw feeder is also disclosed.

The extruder screw comprises a screw body (2) coated by an external functionalization coating (4), and also at least partially coated by a wear detection-quantification coating (5) arranged between the external surface (3) of the screw body (2) and the external functionalization coating (4), and detectable with respect to the external functionalization coating (4).

A rotating member of the present disclosure mainly includes ceramics and includes a first through-hole into which a shaft is inserted and a second through-hole into which a key protruding from an outer peripheral surface of the shaft or a solid lubricant in direct or indirect sliding contact with the outer peripheral surface of the shaft is inserted. The second through-hole is a polygonal shape if viewed in an axial direction of the first through-hole and includes a notch part extending along the axial direction at at least one corner.

A Screw for use in a twin-screw assembly of an elastomer mixture extruder with a threaded part with a single-start thread which defines at least three different sectors of the screw. The three sectors have an intake segment to capture the mixture fed from outside to push it downstream along the longitudinal direction, with a cross-section of the through-flow channel between adjacent flanks of the thread which is constant over at least two pitches or a rotation through 720 degrees of the thread. A transition sector which has a cross-section of the through-flow channel variable and smaller than the cross-section of the through-flow channel and is designed to cause an increase of the thrusting pressure acting on the mixture in transit in the longitudinal direction; and a high-pressure sector designed to cause the compression of the mixture to obtain a maximum pressure of the mixture.

Screw elements, extrusion apparatus, and methods of manufacturing honeycomb bodies are described herein. A segment for a ceramic batch screw extruder machine has at least one pump and mix screw element. The pump and mix screw element has a pitch, a diameter, and a pitch to diameter ratio of 0.8 to 2.6.

Pre-shredded, solid plastic and/or rubber waste is fed in to a melting unit (4), of two sequentially linked melting units (41,42), where the first melting unit (41) is constructed with an extruder axis (39) with a thread interruption (44), which shall cause solidity of the melted feedstock and formation of a compaction and a plug, thereby forcing the gases and steams to escape from the feedstock and to prevent back-flow of gases, via an interconnecting pipeline (28) a second melting unit (42) is mounted, from where the heated high pressure melted feedstock flows into the thermocatalytic reactor (7), where thermal decomposition of the hydrocarbon polymers in the feedstock takes place, then is followed by the collection and storage of the liquid product oil and gaseous end products.

A screw conveyor system for a compaction apparatus can be adapted on a material transportation vehicle. The compaction apparatus is characterized by having a hopper receiving materials and a container storing the materials in a compacted fashion. The compaction apparatus comprises a screw conveyor system that can include a screw conveying the materials from the hopper to the container, a passageway structure traversed by the screw, located between the hopper and the container and allowing passage of the materials. The passageway structure can define an asymmetrical aperture and the passageway structure can include a main passageway and a by-pass passageway allowing passage of materials from the hopper to the container.

The present invention relates to a screw for an extrusion molding machine and an injection molding machine that is adapted to be inserted into a cylinder to convey a molding material injected from a hopper and heated to a molten state by means of a heater, and more particularly, to a screw that includes a wide width spiral portion (15) formed on the frontmost end periphery of a spiral portion (12) of a screw shaft in such a manner as to have a spiral blade having a wide width to prevent shaking and to reduce friction and abrasion against the inner peripheral wall of the cylinder to ensure a longer term operation than the conventional screw.

An infectious waste treatment system and method for decontaminating infectious waste employ a thermal friction extruder in which first and second interleaved counter-rotatable augers include reverse pitch flight sections that urge waste material in a direction opposite to that of the flow stream and into engagement with the back sides of friction plates. This increases the amount of heat generated by the extruder. The reverse pitch flight sections can be selectively replaced with forward pitch flight sections to control the amount of heat imparted to the waste material by the friction plates.

Pre-shredded, solid plastic and/or rubber waste is fed in to a melting unit (4), of two sequentially linked melting equipments (41,42), where the first melting equipment (41) is constructed with an extruder axis (39) with a thread interruption (44), which shall cause solidity of the melted feedstock and formation of a compaction and a plug, thereby forcing the gases and steams to escape from the feedstock and to prevent back-flow of gases, via an interconnecting pipeline (28) a second melting equipment (42) is mounted, from where the heated high pressure melted feedstock flows into the thermocatalityc reactor (7), where thermal decomposition of the hydrocarbon polymers in the feedstock takes place, then is followed by the collection and storage of the liquid product oil and gaseous end products.