Abstract: A worm shaft for a mixing and kneading machine in particular for continuous preparation processes, comprising a shaft rod, on the circumferential surface of which blade elements are arranged which are spaced apart from one another and which extend outward from the circumferential surface of the shaft rod, wherein the blade elements are arranged on the shaft rod, at least in one section extending in the axial direction of the worm shaft, in three rows extending in the axial direction of the worm shaft, wherein at least one of the blade elements of one of the rows is different from one of the blade elements of one of the other rows, and/or the rows of blade elements, viewed in cross-section of the shaft rod, are distributed irregularly over the circumference defined by the outer circumferential surface of the shaft rod, and wherein the angular distance between the midpoints M of the outer circumferential surfaces of the blade elements on the circumferential surface of the shaft rod of adjacent rows differs betw

Abstract: A worm shaft for a mixing and kneading machine particularly for continual processing having a shaft bar, on the circumferential surface of which blade elements are arranged to be spaced apart from one another extending outwards from the circumferential surface of the shaft bar, wherein the blade elements are arranged on the circumferential surface of the shaft bar, at least in one section extending in the axial direction of the worm shaft, in two rows extending in the axial direction of the worm shaft, and wherein each of the blade elements of the at least one section extending in the axial direction of the worm shaft has an elliptic, oval, or biconvex outer peripheral surface in the top view.

Abstract: An extruder is disclosed including: a barrel; and a screw provided with a helical groove; wherein the screw comprises a dewatering portion comprising a first portion, and a second portion at a location downstream from the first portion; wherein, at the dewatering portion, clearance between the groove and the barrel decreases as one proceeds downstream; and wherein clearance reduction ratio at the first portion is greater than clearance reduction ratio at the second portion.

Abstract: A size of an agitating mechanism can be reduced. An agitating mechanism according to an aspect of the present disclosure is an agitating mechanism for agitating fluid flowing through inside a pipe, including: a rotary body placed inside the pipe so as to be able to rotate in a circumferential direction of an inner circumferential surface of the pipe; and a regulation part configured to regulate a movement of the rotary body in a longitudinal direction of the pipe. The rotary body includes a hollow part penetrating the pipe in the longitudinal direction of the pipe and an agitating blade provided in the hollow part.

Abstract: An apparatus and method for processing a foodstuff comprises a closed conveyor path, a conveyor device, and a treatment chamber. The conveyor path includes an inlet and an outlet. The conveyor device is positioned within the closed conveyor path and configured to receive the foodstuff from the inlet. The conveyor device is further configured to convey the foodstuff along the closed conveyor path toward the outlet. The treatment chamber is positioned within the closed conveyor path downstream of the conveyor device for receiving the foodstuff from the conveyor device. The treatment chamber includes a rotatably driven first kneading shaft configured to collide the foodstuff within the treatment chamber.

Abstract: A multi-shaft kneading machine includes a channel and two screws rotatable around first axes of rotation. A pair of gate rods sandwich the two screws and are rotatable around second axes of rotation. Each of the pair of gate rods has two recess parts that form respective spaces through which the two screws penetrate. Each of the pair of gate rods has a first contact surface, which comes into surface contact with a screw when a gate rod is rotated to a minimum degree-of-opening position. Large diameter parts are fitted into the groove of the cylinder, and a small diameter part have a radius of curvature equal to half a distance between two second axes of rotation and smaller than a radius of curvature of the large diameter parts. The small diameter parts of the pair of gate rods are in contact with each other.

Abstract: A method for treating in particular viscous, paste-like materials in a housing (1) with kneading elements (2, 3), in which at least one kneading element (2, 3) is to be monitored.

Abstract: A mixing apparatus includes a main agent supply unit that supplies a main agent to a main agent pipe and a curing agent supply unit that supplies a curing agent to a curing agent pipe. A mixing pipe, with which the main agent pipe and the curing agent pipe merge and through which the main and curing agents pass, has a static mixer and a dynamic mixer that sequentially mix the main and curing agents. A discharge pipe discharges a sealant obtained through the static mixer and the dynamic mixer. An in-system decompressor sets at least the static mixer and the dynamic mixer in a decompressed atmosphere before the main and curing agents are mixed.

Abstract: The mixing and kneading machine (1) for compounding bulk-flowable, plastic and/or pasty masses comprises a working space (9) enclosed by a casing (2), and a working member (3) moving rotatingly and translationally in the casing (2). The working member (3) comprises a plurality of kneader vanes (4). Secured to the casing (2) are kneader pins (6) which protrude into the working space (9). To optimize processing, the main surfaces of the kneader vanes (4) and/or of the kneader pins (6) are configured at least in part as main surfaces (23a-23f).

Abstract: A mixing and kneading machine (1) for continual compounding comprises a screw shaft (3) rotating in a casing (2) and simultaneously moving axially translationally. To sustainably enhance the efficiency of the machine as regards its material thruput per unit of time the screw shaft (3) comprises at least four groups of radial screw vanes (4a, 4b, 4c, 4d) evenly distributed circumferentially, each group consisting of a plurality of screw vanes in axial sequence. The outer diameter (Da) of the screw shaft ranges from 400 to 800 millimeters. The rotary speed of the screw shaft (3) ranges from 30 to 80 rpm. A mixing and kneading machine (1) engineered as such is particularly suitable for compounding an anodic mass in the production of electrodes—anodes—for the aluminum industry.

Abstract: A processing installation for devolatilization of polymer melts comprises a first extruder and a second extruder arranged downstream thereof in a direction of conveyance. The first extruder comprises several rotatably drivable first shafts which are provided with first treatment members and several devolatilization zones with associated devolatilization ports. Correspondingly, the second extruder comprises several rotatably drivable second shafts which are provided with second treatment members and several second devolatilization zones with associated devolatilization ports. The first treatment members have an external diameter which is smaller than or equal to that of the second treatment members. A devolatilization unit is arranged in a transfer zone which interconnects the extruders. The devolatilization unit comprises a perforated plate and a clearance arranged downstream in the direction of conveyance.

Abstract: Improved single screw extruders systems (40) are provided including a single screw extruder (42, 92) as well as an upstream preconditioner (44). The extruders (42, 92) include a single, internal, elongated, helically flighted, axially rotatable screw assembly (52) having one or more improved screw sections (74, 74a, 76). The screw sections (74, 74a, 76) include specially configured flighting (86) wherein adjacent flighting portions (86a, 86b) have smoothly arcuate surfaces (88) extending between the respective flighting portion peripheries (90a, 90b). This flighting design provides smooth, substantially surge-free operation while increasing SME and cook values. The preferred preconditioner (44) has independently controlled mixing shafts (106, 108) allowing the shafts (106, 108) to be rotated at different rotational speeds and/or directions.

Abstract: Provided is a kneading degree adjusting apparatus, which can have a wide adjusting range for a kneading degree even if a gate member and a cylindrical segment are not made so close as to invite a fear of metallic contacts. The kneading degree adjusting apparatus is disposed in a kneading treatment equipment, which includes a cylindrical segment formed at a predetermined portion and a kneading screw for kneading a material while feeding the same to the downstream side, thereby to adjust the kneading degree of the material. The kneading degree adjusting apparatus comprises a gate member having an opposed face confronting the outer circumference of the cylindrical segment and moved toward and away from the outer circumference of the cylindrical segment thereby to change the area of the material passage to be formed between the opposed face and the outer circumference of the cylindrical segment. The outer circumference and the opposed face are corrugated to form the passage into a bent shape.

Abstract: A screw extruder having a body forming a chamber of two barrels housing two counter-rotating axis-parallel rotors, a supply port for the material to be mixed in the chamber at one end of the body, a discharge port for discharging the mixed material at the other end of the body, a conveying section with screws for feeding the material from the supply port downstream to a mixing section which comprises at least two mixing zones, each mixing zone having at least one forward-conveying wing and at least one backward-conveying wing downstream of the forward-conveying wing on each rotor characterized in that a throttle valve is provided in the chamber downstream of the mixing section, and downstream of the throttle valve a second conveying section with screws and a second mixing section are provided.

Abstract: A mixing and kneading machine (1) for continual compounding comprises a screw shaft (3) rotating in a casing 2 and simultaneously moving axially translationally. To sustainably enhance the efficiency of the machine as regards its material thruput per unit of time a screw shaft is proposed having the following geometric ratios: Da/Di=1.5 to 2.0, i.e. the ratio of screw shaft outer diameter Da to screw shaft inner diameter Di is 1.5 to 2.0, Da/H=4 to 6, i.e. the ratio of screw shaft outer diameter Da to stroke H is between 4 and 6, T/H=1.3 to 2.5, i.e. the ratio of pitch T to stroke H is between 1.3 and 2.5. The mixing and kneading machine (1) provided with such a screw shaft (3) is operated preferably at a rotational speed exceeding 500 rpm, particularly exceeding 800 rpm.

Abstract: A device for mixing and/or kneading food products. The device includes a container having an inlet, an outlet, and at least one rotary shaft extending substantially in a longitudinal direction of the container. The at least one rotary shaft includes at least one tool, the at least one tool including at least one bar connected to the at least one rotary shaft via spacers. The at least one rotary shaft further includes an operative area to continuously mix and/or knead the food products, the operative area extending in a longitudinal direction of the at least one rotary shaft.

Abstract: A mixing and kneading machine (1) for continual compounding comprises a screw shaft (3) rotating in a casing (2) and simultaneously moving axially translationally. To sustainably enhance the efficiency of the machine as regards its material thruput per unit of time the screw shaft (3) comprises at least four groups of radial screw vanes (4a, 4b, 4c, 4d) evenly distributed circumferentially, each group consisting of a plurality of screw vanes in axial sequence. The outer diameter (Da) of the screw shaft ranges from 400 to 800 millimeters. The rotary speed of the screw shaft (3) ranges from 30 to 80 rpm. A mixing and kneading machine (1) engineered as such is particularly suitable for compounding an anodic mass in the production of electrodes—anodes—for the aluminum industry.

Abstract: The device for adjusting the degree of mixing according to the present invention is installed in mixing equipment equipped with a kneading/mixing screw for mixing material while feeding the material to a downstream side, wherein a gate member is moved relative to a portion of a circular section provided for the kneading/mixing screw so as to cause a change in the area of a flow path formed between the gate member and the portion of a circular section, thereby adjusting the degree of mixing of the material. A drive quantity changing device; is disposed between the gate member and a drive member.

Abstract: A mixing degree adjusting device comprises a pair of spacer members arranged at a position sandwiching both round sectional portions of a pair of screws from both sides in the aligning direction of the pair of screws, and a pair of drawing members arranged as a position sandwiching both the round sectional portions from both sides in the orthogonal direction that is orthogonal to the aligning direction. The spacer members are movable between an adjusting position opposing to the round sectional portions, and a retracting position, when the screws are extracted from the barrel, for retracting to the outside until the passage of the screws is accepted. Opposing portions opposing to the round sectional portions at the time of moving to the adjusting position are formed in a substantially linear shape extending in parallel with the orthogonal direction seen from the axial direction of the screws.

Abstract: Improved, high Specific Mechanical Energy extrusion systems (20) are provided including a single or twin extruder (22) and an upstream preconditioner (24). The extruder (22) includes an elongated barrel (26) with at least one elongated, axially flighted, rotatable screw assembly (58) therein. The barrel (26) includes a mid-barrel variable restriction valve assembly (32), and the screw assembly (58) has a disrupting/homogenizing screw section (66) therein upstream of the valve assembly (32). The screw section (66) includes a plurality of alternating pitch screw parts (82-92). Preferably, the barrel (26) also has an atmospheric vent (36) downstream of the valve assembly (32).

Abstract: An improved precise control non-return valve assembly which is mounted on the front end of a helical rotating plasticating screw of an injection molding machine or the like that is surrounded by a heated elongated barrel and end-cap that forms a distribution chamber, whose purpose is to allow means for passage of molten plastic fluid in the downstream direction while preventing it in the opposite direction. The valve having an outwardly extended portion of a shaft and has a means to accept a ring that is sandwiched between a bushing assembly and a rear seating area. The bushing assembly consists of at least two bushings and one pin whose dual purpose is to govern the forward movement of the ring and to absorb the force that is being applied to it. The non-return valve assembly when moved forward with the screw, forms a seal, builds pressure, and displaces molten plastic fluid from the distribution chamber through a discharge chamber passageway and into a mold.

Abstract: One object of the present invention is to provide a kneader which can diminish wear of screws and a barrel while preventing the manufacturing process for the screws and barrel from becoming complicated. In this kneader, a pair of screws are rotated about respective axes thereof to knead a material to be kneaded which is introduced into a kneading space formed within a barrel. Each screw has such a shape generating deflection in a predetermined direction perpendicular to an arranged direction of the axes of the pair of screws during kneading of the material to be kneaded, and the kneading space has a shape such that a pair of accommodating spaces which accommodate each of the screws respectively are connected together so as to overlap each other partially in the radial direction, each accommodating space being formed in such a manner that the diameter thereof in the predetermined direction in which there occurs deflection of each screw is larger than in any other direction.

Abstract: A screw extruder comprises an extruder body (4) with a bore (4H), and a screw (5) rotatably disposed in the bore (4H). The screw (5) comprises a screw shaft (7) and two screw flights (8 and 9) disposed in the form of a double helix. The screw flight (9) is substantially continuous, but the screw flight (8) is provided with large interruptions (11) within which a plurality of additional flight pieces (13) are disposed to change the number of passages repeatedly. Mixing/kneading pins (15) protruding into the bore (4H) can be provided. Preferably, the paths (17) for the mixing/kneading pins (15) are positioned within the interruptions (11) and on the upstream side and downstream side of the additional flight pieces (13).

Abstract: A slurry dividing apparatus is configured to divide a main slurry stream into smaller constituent slurry streams, wherein each stream contains a desired proportion of suspended solids. The dividing apparatus includes a main flow channel and a plurality of branch flow channels extending upward from a flow divider that terminates an upper end of the main flow channel. The main slurry stream enters the main flow channel, at an inlet opening thereof, and is decelerated, by an upward extension and expanding cross-section of the main flow channel, before reaching the flow divider and being divided into the smaller constituent slurry streams flowing within the plurality of branch flow channels. Each of the smaller streams flows up and then over a weir, which extends across an upper portion of each of the branch flow channels, and then down into a corresponding discharge flow channel of the apparatus.

Abstract: The present invention provides an improved extruder assembly, that includes a wiper for wiping a screw portion in a low pressure extruder stage, whereby the wiping of the screw portion improves melt conveyance through the low pressure extruder stage. The present invention has particular utility when used in a low pressure venting and entrainment extruder stage of a single screw compounding extruder. The present invention also provides an extrusion/injection unit for use in-line compounding molding system that incorporates the improved extruder assembly.

Abstract: A conveying apparatus comprising an extruder having a housing, a gear pump connected to the extruder, an extruder cylinder rotatably mounted in the housing, and a plurality of pins extending radially outwardly from the extruder cylinder. The extruder housing is provided with helical conveyor paths and openings for the pins.

Abstract: A pin extruder for conveying polymeric material, especially elastomeric material, comprising a stationary extruder housing and an extruder screw rotatably mounted in the housing. A purality of radially outwardly extending pins are disposed on the extruder screw, at least a portion of which is embodied as a cylinder. The extruder housing, adjacent to the cylinder portion of the extruder screw, is provided with essentially helical conveyor paths and with openings for the pins.

Abstract: An extruder has at least three parallel, co-rotating shafts disposed in a cavity therein along a circle. The shafts are equipped with screw elements closely intermeshing over their whole circumference. At least one screw element is formed as a passage screw element with recesses in the screw crest, screw core and/or screw flank. Downstream of a supply port an element is provided for inhibiting the product flow in the flight of the passage screw element. A degassing opening is located downstream and adjacent the inhibiting element.

Abstract: The mixing and kneading machine (1) for compounding bulk-flowable, plastic and/or pasty masses comprises a working space (9) enclosed by a casing (2), and a working member (3) moving rotatingly and translationally in the casing (2). The working member (3) comprises a plurality of kneader vanes (4). Secured to the casing (2) are kneader pins (6) which protrude into the working space (9). To optimize processing, the main surfaces of the kneader vanes (4) and/or of the kneader pins (6) are configured at least in part as main surfaces (23a-23f).

Abstract: A static mixer comprising a mixer body with a first and a second array of intermeshed and interconnecting passageways formed therein that connect, and provide a convoluted flow path between, flow faces at ends of the mixer body. The first and second arrays of passageways preferably interconnect such that the boundaries of adjacent intermeshed passageways overlap to form mixing portals. When used in an injection molding system, a singular melt flow is initially divided at the first flow face of the static mixer, wherein the melt flow divides into the intermeshing passageways and further divides and re-combines at the locations of mixing portals before exiting the static mixer at the second flow face as homogenized melt.

Abstract: The invention relates to a single screw extruder comprising a barrier screw and a barrel in which the barrier screw is held in a manner that permits to rotate and comprising at least one feed zone longitudinal section and at least one melting zone longitudinal section (23). The extruder (10) is characterized in that the barrel (11), on the inner wall (50) thereof in the area of the melting zone longitudinal section (23), has at least one groove (52) which runs in a longitudinal direction. The invention also relates to a method for extruding plastic material using a single screw extruder (10) comprising a barrier screw (40) which is held inside a cylinder (11) in a manner that permits it to rotate, whereby the extruder (10) comprises a feed zone (21, 22) and a melting zone (23), and the barrier screw (40) has at least one solid matter channel (49) and a melting channel (48).

Abstract: A kneading apparatus includes a barrel having a cylindrical chamber; a screw assembly rotating in the chamber so that a material to be kneaded is extruded in the axial direction by the rotation, the screw assembly including a screw section having helical blades and a kneading blade section in order to allow the material to flow into the clearance between the inner wall of the chamber and the kneading blade section, and to apply shearing forces to the material; a metering feeder for feeding the material at a substantially constant volumetric or gravimetric rate into the chamber; an injecting device for injecting a heat-removing medium into the chamber; and a discharging device for separating the heat-removing medium from the material and discharging the heat-removing medium from the chamber. A kneading method using the kneading apparatus is also disclosed.

Abstract: The invention relates to an extruder for the preparation of rubber mixtures for elastomeric products and comprises a cylinder, an endless screw rotatably mounted in the cylinder for uptake transport and homogenization of the rubber mixture, and an extrusion tool; wherein the endless screw is configured with zones of multiple treads in dependence of varying helix angle and depth of thread so that the rubber mixture transported through the zones undergoes a temperature increase through heat dissipation to such an extent that the temperature of the extrudate approaches the vulcanization temperature thereof.

Abstract: An extruder, in particular for elastomer material, is described, the extruder being of the type comprising an extruder body provided with a cylindrical chamber inside which an extrusion screw is rotatably inserted, and a plurality of mixing pin members inserted in the casing of the cylindrical chamber and projecting inside the the chamber, wherein each pin member is arranged tangential to the core of the screw, opposite interruptions in the thread of the screw and passes through the whole of the chamber, engaging in both the opposite walls of the casing.

Abstract: An extruder arrangement for viscous material, especially rubber or natural or synthetic rubber mixtures, is provided. It has a screw extruder (12) with an extruder screw (16) that in the direction of conveying is followed downstream by a conveying device. The conveying device is a planetary pump (18), the outer ring (22) of which is rotatably supported.

Abstract: A batch mixer having a barrel which forms a cylindrical sealed chamber having a section consisting of two mutually communicated circles, and two rotors housed in the chamber to mix a mixing material by rotation, at least one of the inner wall of the barrel and the surface of the rotor having a plurality of recessed parts or protruding parts. The recessed parts or protruding parts are formed of grooves or projections extended in the direction crossing to the rotating direction of the rotor rotated in the chamber to mix the material. According to this structure, a batch mixer excellent in the controllability of material temperature during mixing can be provided.

Abstract: The invention relates to a method and a an apparatus for processing various materials, the apparatus including at least two annular feed gaps placed one within the other. The beginning of each feed gap is provided with a grinding section (5), which is followed in the apparatus by a mixing section (10). The materials are processed in the grinding section (5), whereafter they are mixed in the mixing section (10), and the mixture is extruded into a product.

Abstract: The invention relates to a single screw extruder comprising a barrier screw and a barrel in which the barrier screw is held in a manner that permits to rotate and comprising at least one feed zone longitudinal section and at least one melting zone longitudinal section (23). The extruder (10) is characterized in that the barrel (11), on the inner wall (50) thereof in the area of the melting zone longitudinal section (23), has at least one groove (52) which runs in a longitudinal direction. The invention also relates to a method for extruding plastic material using a single screw extruder (10) comprising a barrier screw (40) which is held inside a cylinder (11) in a manner that permits it to rotate, whereby the extruder (10) comprises a feed zone (21, 22) and a melting zone (23), and the barrier screw (40) has at least one solid matter channel (49) and a melting channel (48).

Abstract: A mixing section (10,50,60) for mixing material in an extruder (8) having a barrel (32), The mixing section (10,50,60) includes a screw (14) having a central shaft (16), and a floating annular sleeve (12) located between the screw (14) and the barrel (32), and surrounding a portion of the screw (14). The sleeve (12) has mixing elements (28) protruding radially inward toward the screw (14). A portion of the central shaft (16) has mixing elements (18) protruding radially outward toward the sleeve (12). The mixing elements (18) on the screw (14) and the sleeve (12) create multiple regions of reorientation (2) in the material to be mixed which produce improved dispersive mixing.

Abstract: The invention relates to a single screw extruder comprising a barrier screw and a barrel in which the barrier screw is held in a manner that permits to rotate and comprising at least one feed zone longitudinal section and at least one melting zone longitudinal section (23). The extruder (10) is characterized in that the barrel (11), on the inner wall (50) thereof in the area of the melting zone longitudinal section (23), has at least one groove (52) which runs in a longitudinal direction. The invention also relates to a method for extruding plastic material using a single screw extruder (10) comprising a barrier screw (40) which is held inside a cylinder (11) in a manner that permits it to rotate, whereby the extruder (10) comprises a feed zone (21, 22) and a melting zone (23), and the barrier screw (40) has at least one solid matter channel (49) and a melting channel (48).

Abstract: In the case of thickening a feed resin without pre-drying, a device is taught to enhance the thickening effect. The device includes a chamber 4 having a mixing rotor therein for continuously mixing a resin between a feed port 2 and a discharge port 3. A plurality of vent ports 7 connected to vacuum pumps 8, 9 are provided for reducing the pressure in the chamber. An element, e.g. a screw feeder 10, is provided for introducing a viscosity-increasing chemical agent into the chamber. The screw feeder is isolated from the reduced pressure areas of the chamber by elements 35, e.g. reverse screw flights of the rotor. In operation, feed resin from a hopper 6 enters the chamber through port 2 and is dehydrated while being continuously mixed in a drying section 14 via vents 7. After addition of the chemical agent, the resin is continuously mixed in a thickening section 15 while being deaerated.

Abstract: An extruder screw mechanism has a barrel that is heated by heating coils, an internal screw, and a cylindrical melt sleeve having a plurality of circumferentially spaced, axially extending, radial slots there through located between the external barrel and the internal screw. Another embodiment of the extruder has a barrel and an internal screw, with the internal screw having either a single central axial bore or a plurality of internal axial bores. The internal screw is provided with a plurality of external threads, with the threads each having a curved starting portion with a helix angle that has a finite value and gradually increases along an initial portion of the screw until the threads are substantially linear and parallel to the axis of the screw along the melting portion of the screw; a related embodiment has threadless portion separating the linear threads from the curved upstream threads.

Abstract: The invention relates to a single screw extruder comprising a barrier screw and a barrel in which the barrier screw is held in a manner that permits to rotate and comprising at least one feed zone longitudinal section and at least one melting zone longitudinal section (23). The extruder (10) is characterized in that the barrel (11), on the inner wall (50) thereof in the area of the melting zone longitudinal section (23), has at least one groove (52) which runs in a longitudinal direction. The invention also relates to a method for extruding plastic material using a single screw extruder (10) comprising a barrier screw (40) which is held inside a cylinder (11) in a manner that permits it to rotate, whereby the extruder (10) comprises a feed zone (21, 22) and a melting zone (23), and the barrier screw (40) has at least one solid matter channel (49) and a melting channel (48).

Abstract: A dynamic mixer is described comprising at least one housing with two or more inlets for the mixing components and an outlet as well as a shaft with a screw thread and a drive means for the rotation of the shaft, as well as a process for the mixing of highly reactive educts. The mixer has a mixing zone in which oppositely directly threaded grooves are present on the shaft and on the internal wall of the housing, and at least one inlet is arranged in the mixing zone with oppositely directed threaded grooves.

Abstract: A continuous mixer in which a pair of left and right rotors 4 are rotatably inserted into a chamber 2 having a feed port 13 and a discharge port 14 for materials at both axial ends, respectively, a gate device 17 for adjusting the polymer flow resistance of the materials is provided halfway in the axial direction of the chamber 2, and a first and a second mixing portions 19, 21 are formed at portions, respectively, of the rotors 4 positioned upstream and downstream of the gate device 17, wherein a forced feed means 23 for forcibly post-adding the materials is connected to a portion downstream of the gate device 17 in the chamber 2 and upstream of the discharge port 15.

Abstract: An apparatus for kneading or mixing materials. The apparatus including a housing having first and second separable housing sections. A cavity in each housing section, the cavities cooperating together to form a mixing chamber when the housing is closed. First and second liners are releasably secured by liner retainers to the respective first and second housing sections. A plurality of kneader pins are secured to the liner sections and cooperate with a kneader screw disposed in the mixing chamber to knead or mix various materials.

Abstract: A cylinder 2 is formed with an upper guide bore 10a and a lower guide bore 10b at a position corresponding to a gate part B. Gate rods 7 are rotatably inserted through the guide bores 10a, 10b, respectively. Each of the gate rods 7 is formed with opening degree changing recesses in a form of an opencut adjacent to each other in an axial direction in order to constitute opening degree variable channels S in combination with opening degree variable channel forming parts 14 of two screws 3. Each of the recesses 11 consists of a first semicircular face 12 and a second semicircular face 13 in such a shape that an upstream side end of the first semicircular face 12 is diagonally cut.

Abstract: An apparatus and method for continuously reducing the viscosity of molten moldable polymeric material uses shear vibration under extensional flow to cause disentanglement. One or more station treatment cavities are defined by a gap composed of two closely separated surfaces in relative motion with each other at given speed and/or submitted to relative oscillations, with given frequency and amplitude to produce a shear deformation on the molten moldable material and a controlled variation of the gap dimension. The surface have a contour profile of ribs and/or bumps and/or grooves over which the molten moldable material can flow and/or can be dragged and/or is being pushed through and/or pumped through. The treatment cavities have an inlet through which the molten moldable material can pass into, and an outlet through which it can exit each treatment cavity.

Abstract: An extruder of the Transfermix type comprises a barrel in which a screw rotates for transporting and mixing visco-elastic compounds. The extruder has an inlet, a compression section, a plasticizing section and an exit section. The plasticizing section is of the Transfermix type, in which a helical groove in the screw varies in cross section from full area to zero area, while the cross section of an oppositely handed helical groove in the barrel varies from zero to full area. A return section follows the plasticizing section, and the operative contact-surface of the return section is formed by a sleeve which forms a cylindrical gap between the sleeve and the screw, the sleeve being axially movable to close or open the gap to produce a continuously adjustable throttle.

Abstract: A mixing device is placed in a stream of material flowing in a longitudinal direction for mixing constituents in the stream, the mixing device including a plurality of mixing elements spaced apart from one another and projecting transversely into the oncoming stream of material. The mixing elements are spaced laterally from one another and each mixing element has a cup-shaped upstream face for confronting the oncoming stream of material while allowing the stream of material to flow in the longitudinal direction, between the laterally spaced apart mixing elements, to effect enhanced mixing with lower shear. The mixing elements are arrayed in a field in lateral rows spaced longitudinally along the stream of material, the longitudinal spacing between the lateral rows being such that the mixing elements of adjacent rows are interleaved.