An acrylic rubber bale excellent in storage stability and processability, a method for producing the same, a rubber mixture obtained by mixing the acrylic rubber bale, and a rubber cross-linked product of the rubber mixture are provided. The acrylic rubber bale according to the present invention includes an acrylic rubber having a reactive group and a weight average molecular weight (Mw) of 100,000 to 5,000,000, wherein an amount of gel insoluble in methyl ethyl ketone is 50% by weight or less, and pH is 6 or less.

A system according to various embodiments can include a source for supplying a material to be treated, an extruder, at least two screws, and a drive coupled to the screws for axially rotating the screws. The extruder includes an inlet for receiving the material, which is fed therein in a controlled manner. The screws are provided within the housing of the extruder. The screws have a plurality of compression and release stages that create mechanical heat which is directly applied to the material to change the mechanical properties of the material thereby facilitating a conversion of a physical state of the material from a non-compactable state to a compactable state as the screws rotate and move the material longitudinally along the screws to produce a final product, for example, a feed tub for use as an animal feed.

An extruder screw for plasticizing at least one plastic or plastic mixture, including a melting zone, a shaft zone and a mixing zone arranged between the melting zone and the shaft zone, wherein a conveying flight is formed in the melting zone and in the shaft zone, which extends helically along a longitudinal axis of the screw, wherein a conveying flight of the melting zone ends at an end of the melting zone towards the mixing zone and a conveying flight of the shaft zone begins at an end towards the mixing zone. A flight depth of the melting zone continuously decreases along the longitudinal axis of the screw to the mixing zone. Further, an extrusion device having the extruder screw and to a method for plasticizing at least one plastic or plastic mixture.

An extruder system that includes an extruder apparatus for melting regolith to create a molten regolith. The extruder apparatus includes a chamber for receiving the regolith and an auger disposed in the chamger for forcing the regolight through the chamber. The extruder apparatus also includes copper wiring coiled around the chamber to create an induction field in the chamber to melt the regolith when alternating current is passed through the copper wiring. A method of generating molten regolith via electrical induction includes feeding regolith to the extruder apparatus and heating the regolith in the extruder apparatus via electrical induction to create a molten regolith. The method also includes extruding the molten regolith from the extruder apparatus.

An extruder system that includes an extruder apparatus for melting regolith to create a molten regolith. The extruder apparatus includes a chamber for receiving the regolith and an auger disposed in the chamger for forcing the regolight through the chamber. The extruder apparatus also includes copper wiring coiled around the chamber to create an induction field in the chamber to melt the regolith when alternating current is passed through the copper wiring. A method of generating molten regolith via electrical induction includes feeding regolith to the extruder apparatus and heating the regolith in the extruder apparatus via electrical induction to create a molten regolith. The method also includes extruding the molten regolith from the extruder apparatus.

An extruder configured to extrude a solid raw material containing moisture includes a barrel, a hopper, a discharge port, and a slot portion, through which the inside and outside of the barrel communicate each other, is provided between the discharge port and the hopper; a screw, and a heater mounted on the barrel to heat the raw material. Raw material introduced into the barrel through the hopper is heated by the heater while being transferred within the barrel through the screw. A kneading zone, in which raw materials transferred by the screw threads are compressed, is formed on the screw. Since the raw material is melted within the barrel, a heating temperature of the heater and an axial rotation speed of the screw are controlled so that a sealing membrane that shields an inner transverse section of the barrel is formed from the liquid raw material in the kneading zone.

A torpedo for an extruder comprises: longitudinal member (9) which is provided at the periphery thereof with a plurality of thread portions (12) which protrude outwards and which are spaced apart in the circumferential direction; a plurality of sluice blades (19) which are mounted so as to be movable on the longitudinal member and which are partially engaged in apertures (18) of the longitudinal member, the longitudinal member (9) and the sluice blades (19) being provided with complementary radial guiding surfaces (13, 14, 18) which are in contact with each other; and adjustment means (28) for radially displacing the sluice blades relative to the longitudinal member. The sluice blades extend through the spaces between the thread portions, respectively. The thread portions (12) and the sluice blades (19) are provided with complementary radial guiding surfaces (13, 14, 18).

A process for producing a polypropylene composition using a compounding extruder includes a) a melting section having a first elongated cylindrical tube with a first inlet port to receive a propylene-based polymer and additives containing an elastomer of ethylene and α-olefin comonomer having 4 to 8 carbon atoms and a first outlet port to discharge a first melt composition containing a melt of the propylene-based polymer and the additives and a first screw arranged in the first elongated cylindrical tube, convey the propylene-based polymer and the additives to the first outlet port, and a mixing section including a second elongated cylindrical tube having a second inlet port to receive the first melt composition, and a second outlet port to discharge a second melt composition containing the first melt composition and the optional further component and a second screw arranged in the second elongated cylindrical tube to convey the first melt composition to the second outlet, wherein the first screw and the second screw areoperable at different screw speeds. The process includes: A) feeding the propylene-based polymer and the additives to the first inlet and discharging the first melt composition from the first outlet, wherein the first screw is operated at a first screw speed and B) feeding the first melt composition from the first outlet to the second inlet, and discharging the second melt composition from the second outlet, wherein the second screw is operated at a second screw speed smaller than the first screw speed.

A conveyance portion, a barrier portion, and a path are provided at places of a screw main body in which a kneading portion is provided. In at least one of the places, the path is provided inside the screw main body, and includes an entrance and an exit. The entrance is opened to urge the raw materials having the conveyance limited by the barrier portion to increase pressure on the raw materials, to flow in the entrance. The raw materials flowing from the entrance flow through the path in the same direction as a conveyance direction of the conveyance portion.

At a part of the screw main body at which the kneading portion is provided, conveyance portions, a barrier portion and a path are provided at a plurality of places. At least one of the places, the path is provided inside the screw main body, and includes an entrance and an exit. The entrance is opened in such a manner that the raw material whose pressure is enhanced by being restricted in conveyance by the barrier portion flows into the entrance. The path is formed in such a manner that the raw material flowing into the path from the entrance flows toward the exit in a direction opposite to the direction of conveyance.