Abstract: A system for applying a building material, including: a movement device for modifying a site of application in a space; a first component of the building material; a second component of the building material; and a mixer for mixing the first component and the second component, the mixer including a drive and a mixing chamber provided with a stirrer shaft and a conveyor device, the conveyor device being designed as a screw conveyor with windings, and the mixer being adapted to the building material.

Abstract: A method and system for providing transitioning a station (STA) to an uplink multi-user (UL MU) disable mode and to a UL MU enable mode is provided. According to one embodiment, a method includes entering, with the STA, a UL MU enable mode, and determining whether to transition the STA to a UL MU disable mode based on a predetermined interrupt condition. The predetermined interrupt condition is provided by the STA in the UL MU enable mode to transition the STA to the UL MU disable mode when the STA is unable to respond to a UL MU operation.

Abstract: A method for the production of a glassy metal polymer composite is disclosed. The method comprises adding a polymer and a metal to an extruder, wherein the extruder is heated to an extrusion temperature greater than the melting point of the polymer and the melting point of the metal; mixing the metal and the polymer in the extruder for a predefined residence time; and co-extruding the composite from the extruder.

Abstract: A meshing-type rubber internal mixer and a working method thereof are provided. The meshing rubber internal mixer includes a frame mechanism, a mixing mechanism, and an unloading mechanism. The mixing mechanism is on the upper side of the unloading mechanism. The mixing mechanism and the unloading mechanism are in the frame mechanism. An internal mixing chamber is of a closed structure through first automatic telescopic plates and second automatic telescopic plates. The gap between a first meshing-type rotor and a second meshing-type rotor is small, a material is compressed to enter the space between the first meshing-type rotor and the second meshing-type rotor to be extruded with an internal mixing chamber wall. The material is flaky in the internal mixing chamber, so that the material produces great strain deformation, thereby achieving excellent dispersing and mixing effects.

Abstract: A preparation apparatus for preparing feed for animals, includes a first storage container for storing a dehydrated feed, a second storage container for storing a liquid such as water, mixing chamber, a mixer for mixing the dehydrated feed and the liquid in order to form a feed ration in paste form, and a consumption container arranged to receive the feed ration, wherein the mixing chamber includes an opening, the mixing chamber is mounted movable relative to the preparation apparatus, so as to move from a first position to a second position.

Abstract: Described is the production of water-absorbing polymeric particles by polymerizing a monomer solution or suspension comprising a) at least one ethylenically unsaturated acid-functional monomer which is optionally at least partly present as salt, b) at least one crosslinker and c) at least one initiator, wherein the process further comprises drying the resulting polymer and also optionally grinding the dried polymer and sieving the ground polymer and also optionally surface-postcrosslinking the dried and possibly ground and sieved polymer, and wherein the polymerization is carried out in the presence of aminopolycarboxylic acids and/or salts thereof, in particular in the presence of ethylenediaminedisuccinic acid and/or a salt thereof.

Abstract: The present invention relates to screw elements with novel, tightly intermeshing, self-cleaning, co-rotating screw profiles for multishaft screw machines with pairs of co-rotating and fully abrading screw shafts, to the use of these screw elements in multishaft screw machines and to a method of generating these screw elements.

Abstract: A kneader/stirrer includes two rotary shafts extending parallel to each other in the processing chamber, and first and second regular triangular impellers mounted to the respective rotary shafts. The first impellers are located at the same axial positions as the respective first impellers. The impellers are fixed to the respective rotary shafts at points offset from the centers of the respective impellers in a predetermined direction by a predetermined distance such that when the two rotary shafts rotate in the same direction at the same speed, each pair of first and second impellers are eccentrically pivoted, with one apex of one of the pair of impellers kept in contact with or in close proximity to the contour of the other impeller, thereby scraping off polycondensation resin (material to be processed) adhered to the other impeller.

Abstract: A device for carrying out mechanical, chemical and/or thermal processes in a housing (3) having mixing and cleaning elements (5) on shafts (1, 2), wherein the mixing and cleaning elements (5) of the shafts (1, 2) engage into each other when rotating about the axes thereof and two mixing and cleaning elements (5) are arranged at least one shaft (1, 2) consecutively in the axial direction in a 180° rotation-symmetrical manner about the axis (A) of the shaft (1, 2). Each mixing and cleaning element (5) comprises a disc element (6) and the disc element (6) has an outer edge (7) running in a radius (r) in an arch segment of approximately 90° or slightly bigger about the axis (A) of the shaft (1, 2) and wherein side edges (8.1, 8.2) abut on both sides toward the shaft (1, 2), wherein one or more bars (9.1, 9.2) sit on the edge (7).

Abstract: A mixing rotor includes: a rotor shaft portion that includes a cooling passageway formed therein, and a mixing blade portion that is formed in an outer circumferential portion of the rotor shaft portion, wherein each of the long blades of the mixing blade portion includes a land portion as an end surface of the long blade facing a radially outside of the mixing rotor, a length of each of the long blades in the axis direction is set to be 0.6 times or more as large as a length of the mixing blade portion in the axis direction, a biting angle of each of the long blades is set to an angle equal to or smaller than 31°, and a center angle with respect to a land width as a width of the land portion in the cross-section of each of the long blades orthogonal to the axis direction is set to an angle equal to or larger than 7°.

Abstract: The present disclosure is directed to methods for preparing rubber compositions where those rubber compositions comprise at least one telechelic polymer and at least one filler. The methods make use of a mixer that includes a mixing chamber and at least one rotor with wings of specified configuration. Use of the disclosed methods yields a rubber composition with improved properties including an improved dispersion index after master batch mixing as compared to the same rubber composition mixed using standard 4 wing mixers.

Abstract: Provided is a kneading rotor, a batch kneader and a method of kneading materials capable of obtaining kneaded materials with higher quality in comparison to conventional kneaded materials when the materials to be kneaded are kneaded in a high temperature state. The kneading rotor comprises a rotor portion which is disposed in a kneading chamber of a chamber of a batch kneader, and applies shear force, by using a plurality of kneading blades, to materials to be kneaded which pass through a tip clearance. A first long blade of the plurality of kneading blades has an apex for forming, with the inner surface of the chamber forming the kneading chamber, three-staged tip clearances of different sizes configured from a combination of a large tip clearance, a mid tip clearance that is smaller than the large tip clearance, and a small tip clearance that is smaller than the mid tip clearance so as to be arranged in the longitudinal direction of the first long blade.

Abstract: A device for carrying out mechanical, chemical, and/or thermal processes in a housing (3), comprising mixing and cleaning elements (5) on at least two shafts (1, 2), the mixing and cleaning elements (5) on the shafts (1, 2) meshing with each other and being equipped with disk elements that include kneading bars. The number of disk elements including kneading bars is adjusted to the speed ratio between the shafts.

Abstract: A kneading rotor, in which the length L4 of a long blade in the direction of rotation of a rotor section is greater than one half of the total length L5 of a rotor section main body in the direction of rotation, and the long blades are arranged in such a manner that, in a case where a pair of the rotor sections are arranged mutually in parallel inside the chamber of the closed kneading machine and are rotated in mutually opposite directions, an end section on the rearward side in the direction of rotation of the rotor section, of the long blade of one of the rotor sections, and an end section on the forward side in the direction of rotation of the rotor section, of the long blade of the other one of the rotor sections, alternately repeat mutually an approaching action and a separating action, and in the state of approach, the end section on the forward side and the end section on the rearward side oppose each other in the direction of rotation of the rotor sections on a line which links the respective central

Abstract: A twin screw extruder includes a barrel having a chamber, a discharge port, an extrusion molding die coupled to the discharge port of the barrel, axially extending first and second screw shafts, and a screw shaft support. The screw shaft support includes first and second spacer bearings disposed on the first and second screw shafts, and a first cross member including first and second loops slidably coupled to the first and second spacer bearings. A second cross member is spaced apart from the first cross member by a connection member, and also includes first and second loops slidably coupled to the first and second spacer bearings. The connection member is situated between the first spacer bearing and the second spacer bearing, and connected to the first cross member and the second cross member.

Abstract: A plurality of paddles Pn (n=1 to 17) is provided on an external periphery of a rotary shaft 3 so as to be arranged helically at a predetermined angular pitch of 90°, and a plurality of paddles Qn is provided on an external periphery of a rotary shaft 4 so as to be arranged helically at a predetermined angular pitch of 72°. The rotary shafts 3, 4 are made to rotate in opposite directions at unequal speeds to convey an object to be kneaded in one conveying direction along the rotary shafts 3, 4 while being kneaded by the paddles. The paddle surfaces of the paddles have either a normal phase for advancing the kneaded object in a feed direction or a reverse phase, and the paddles are arranged so that phases cyclically repeat in the sequence “normal, normal, reverse” in the axial direction of the rotary shafts.

Abstract: A food kneading appliance especially adapted to mix and knead bread or pizza dough or dough of other types includes a container, a central body located in the center of the container, kneading tools, and a drive unit to rotate the central body. The central body includes a stirring spindle and a kneading spindle which are positioned in the same axis and rotate in opposite directions in operation. The kneading tools include a dough hook disposed on the stirring spindle and a dough mixer disposed on the kneading spindle. The appliance can provide large torque and low speed operation so that the dough can be processed without overheating and Deteriorating. Beyond that, the dough is easy to be thoroughly mixed and achieve high quality dough that is comparable to manual kneading. Another advantage of the invention is that the kneading process is stable and low in noise.

Abstract: A kneading apparatus has a pair of rotary shafts mounted to undergo rotation in different directions of rotation and at different rotational speeds from one another. Stirring members are helically arranged on outer peripheries of the rotary shafts at predetermined helical and angular pitches for kneading an object during rotation of the rotary shafts. The helical pitch of the stirring members of one of the rotary shafts has an inverse helix from that of the stirring members of the other rotary shaft. The stirring members have surfaces with a first phase configured to move the kneaded object in a feed direction or a second phase symmetrical to the first phase and configured to move the kneaded object in a direction reverse to the feed direction. The stirring members are arranged so that the first and second phases cyclically repeat in a predetermined sequence in axial directions of the rotary shafts.

Abstract: A kneader/stirrer includes two rotary shafts extending parallel to each other in the processing chamber, first and second regular triangular impellers mounted to the respective rotary shafts. The first impellers are located at the same axial positions as the respective first impellers. The impellers are fixed to the respective rotary shafts at points offset from the centers of the respective impellers in a predetermined direction by a predetermined distance such that when the two rotary shafts rotate in the same direction at the same speed, each pair of first and second impellers are eccentrically pivoted, with one apex of one of the pair of impellers kept in contact with or in close proximity to the contour of the other impeller, thereby scraping off polycondensation resin (material to be processed) adhered to the other impeller.

Abstract: The invention relates to mixing devices, methods of operating mixing devices, and methods of blending a granular substrate with a coating material. These mixing devices and methods substantially prevent the agglomeration of solids and/or viscous liquids on rotational and/or static elements of the mixing device.

Abstract: A process for continuously performing polymerization processes, wherein monomer(s), catalysts, and initiators are added continuously to a backmixed mixing kneader (1-1.3) with a length/diameter ratio of 0.5-3.5 and backmixed therein with already reacted product, and the reacted product is simultaneously drawn off continuously from the mixing kneader (1-1.3).

Abstract: A machine for the production of dough mixes for foodstuffs includes a fixed tank and at least two kneading implements with fixed axes of rotation.

Abstract: A kneading rotor, in which the length L4 of a long blade in the direction of rotation of a rotor section is greater than one half of the total length L5 of a rotor section main body in the direction of rotation, and the long blades are arranged in such a manner that, in a case where a pair of the rotor sections are arranged mutually in parallel inside the chamber of the closed kneading machine and are rotated in mutually opposite directions, an end section on the rearward side in the direction of rotation of the rotor section, of the long blade of one of the rotor sections, and an end section on the forward side in the direction of rotation of the rotor section, of the long blade of the other one of the rotor sections, alternately repeat mutually an approaching action and a separating action, and in the state of approach, the end section on the forward side and the end section on the rearward side oppose each other in the direction of rotation of the rotor sections on a line which links the respective central

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 mixing kneader comprising at least two shafts (2,3) configured as hollow shafts, on whose surfaces kneading bars (4) are disposed on elements (5). The construction of the shafts is selected in such a way that the resonant frequencies of the shafts have a separation of at least 5% from the excitation frequencies. At least one of the shafts is preferably flowed through by a temperature-control medium, the inlet being disposed on one side and the outlet on the other side of the shaft. The mixing kneader preferably comprises at least one orifice above the shafts which is configured as a dome, the dome being closed by a displacer (22). In addition, at least one orifice for product withdrawal is provided, whose orifice cross section is adjustable during operation.

Abstract: This application relates generally to dough mixers and more particularly to a dough mixer including a mixing bowl with refrigeration/cooling jacket flow channels. Furthermore, the refrigeration/cooling jacket flow channels include curved end portions and/or curved guide vanes which provides for more efficient cooling of the bowl.

Abstract: A mixer having improved axial and radial mixing which retains good mixing time even during large viscosity changes, comprising a housing with at least one helical or anchor agitator located centrally in the housing in combination with at least one eccentrically arranged screw or blade agitator, preferably in mutual engagement, the combination of a helical agitator and a screw agitator enabling a much shorter mixing time as compared to a mixer having only a helical agitator without a screw agitator.

Abstract: A plurality of mixing rotors that are housed in a chamber having a cocoon-shaped cross section in a tangential non-intermeshing state, where a plurality of long wings and short wings are provided on a wing portion of the mixing rotors. The long wings and the short wings severally have a plurality of different sizes of tip clearances, a twist angle of the long wings is changed in the axis direction, and makes mixing efficiency and dispersion efficiency compatible. Further, cooling medium paths are provided severally in the chamber and the mixing rotors to suppress excessive increase of the temperature of mixing materials. According to a batch mixer using the mixing rotors, it is possible to control quality reduction of the mixing materials caused by heat generation, and to improve the productivity by increasing the number of the wings without diminishing inherent processing performance of the mixer.

Abstract: A method for the continuous phase conversion of a product in a kneader mixer, into which the product is introduced, said mixer comprising kneading elements that are mounted on at least one shaft. The product is back-mixed until a predefined viscosity of the product is determined by measurement of the torque of the shaft, or a product with a predetermined viscosity that has already been achieved is back-mixed, the kneader mixer is then switched to a continuous mode, in which optionally and additional component is added and the product is subsequently transported to the discharge point.

Abstract: The aim of the invention is to improve an existing mixing device in such a manner that for a predetermined reactor length, retention time is increased and the material which is to be processed is transported at essentially the same speed irrespective of the radial distance thereof from the rotational axis. As a result, at least one row of blades is arranged on each shaft and each row of blades comprises at least two individual blades and the blades are fixed to the shaft at an incidence angle ? in relation to the longitudinal axis of the shaft. The blades are curved in themselves, such that the blades form an angle of incidence ? at the fixing point on the shaft and an angle of incidence ? on the outer diameter DA.

Abstract: An improved rotor design is provided for an internal batch mixing machine. A rotor has a rotor body with an axially extending central cavity, and with a plurality of mixing wings defined on the outer surface of the rotor body. A plurality of internal reinforcing ribs of generally spiral or curved configuration are defined on the rotor body and project into the cavity.

Abstract: A device for mixing and/or kneading food products is provided with a container having an inlet, an outlet as well as at least two counter-rotating shafts that extend substantially in the longitudinal direction of the container. Each shaft is fitted with at least one tool, which tool comprises at least one bar that helically surrounds the shaft, which bar is fixed to the shaft by means of spacers. The bar extends substantially as one whole over an operative area of the shaft.

Abstract: A reactor for carrying out catalyzed liquid reactions in which the catalyst is present as a dispersion in the reaction zone. The reactor includes at least one inlet and outlet, with all starting materials being fed in via the inlet and all products being discharged via the outlet. The inlet and outlet can be switched so that an exit previously serving as the outlet is utilized as an entrance serving as the inlet and at the same time an entrance previously serving as the inlet is utilized as an exit serving as the outlet. The inlet and outlet each include a filter element that keeps the catalyst in the reactor. The reactor also includes a device that ensures homogeneous distribution of the catalyst and the starting materials in the reactor. This reactor can carry out reactions at a high solids content without the catalyst having to be separated off from a product stream in an extra process step and without regular cleaning and thus shutdown of the process being necessary.

Abstract: An internal mixer for kneading plastic materials, particularly synthetic materials, caoutchouc or rubber mixtures includes a housing with a mixing chamber, two rotors which are driveable in opposite directions and are arranged in the mixing chamber with parallel axes. The rotors have non-meshing rotor bodies, wherein each rotor body has four helically mixing wings which at one end thereof define a front passage to the corresponding front wall of the housing. Each rotor body has for helically extending mixing wings which are successively oppositely arranged on the circumference, wherein the mixing wings extend at least over half the axial length of the mixing chamber, and wherein the mixing wings define at one end thereof a front passage to the corresponding front wall of the housing.

Abstract: The present invention relates to a process for the manufacture of composite materials having lignocellulosic fibres dispersed in a thermoplastic matrix, while generally maintaining an average fibre length not below 0.2 mm. The process comprises defibrillation of the lignocellulosic fibres using a mixer and at a temperature less than the decomposition temperature of the fibres in order to separate the fibres and generate microfibres, crofÊbres, followed by dispersion of the fibres in the thermoplastic matrix by mechanical mixing to get the moldable thermoplastic composition, followed by injection, compression, extrusion or compression injection molding of said composition. The process produces high performance composite materials having a tensile strength not less than about 55 MPa, a flexural strength not less than about 80 MPa, a stiffness not less than about 2 GPa, notched impact strength not less than about 20 J/m, and un-notched impact strength not less than about 100 J/m.

Abstract: A machine for the production of dough mixes for foodstuffs includes a fixed tank and at least two kneading implements with fixed axes of rotation.

Abstract: A blending system incorporating a blender with an operating cavity housing a plurality of elongate rod elements extending at least partially along the length of the operating cavity such that controlled relative movement between the rod elements and a multi-constituent composition within the operating cavity causes the development of predefined structures within the multi-constituent composition. The cavity within the blender incorporates a diminished cross-section in the vicinity of its terminal end. Methods to provide controlled development of microstructures and properties are also provided.

Abstract: This invention relates to a device for particle blasting, comprising a mixing device for mixing the particles and the carrier gas. The mixing device comprises, on the one hand, a mixing plate (3) wherein at least one supply channel (6) for the carrier gas, at least one supply channel for the particles (14) and at least one discharge channel (7) for the mixture are provided, and on the other hand, comprises a rotatable distribution disc (1) provided with cavities (2), which during rotation are positioned in such a way that they are first filled with particles and then form a temporary connection between the supply channel (6) and the discharge channel (7), with the result that the carrier gas and the particles are mixed. Since both the supply channel and the discharge channel are provided in one and the same element, the seal between mixing plate and rotor is easy to achieve.

Abstract: An improved rotor design is provided for an internal batch mixing machine. A rotor has a rotor body with an axially extending central cavity, and with a plurality of mixing wings defined on the outer surface of the rotor body. A plurality of internal reinforcing ribs of generally spiral or curved configuration are defined on the rotor body and project into the cavity.

Abstract: A large-volume reactor (10) for treating a free-flowing material, having a housing (12) which surrounds an interior space (14), a material feed (11) at one end of the housing (12) and a material discharge (13) at the other end of the housing (12). A rotor shaft (22), which is driven in rotation about its axis and conveys the material in the direction from the material feed (11) to the material discharge (13), is arranged in the interior space (14). A partition wall (16) in the interior space (14) defines two separate process spaces (18?, 18?) from one another, and the partition wall (16) includes a build-up system (24) having a build-up system passage (26) which leads from an inlet opening (40) which opens out into the first process space (18?), to an outlet opening (42) which opens out into the second process space (18?).

Abstract: With conventional closed kneaders, the temperature of the kneaded material remains high at the end of primary kneading because insufficient cooling is made in the interior part of the kneaded material, making it necessary to either provide cooling time between the primary and secondary kneading or to transfer materials to another kneader after the end of primary kneading for the secondary kneading. This has constituted an obstruction to productivity. In view of such problems, a closed kneader is capable of controlling the kneaded material temperature at the end of primary kneading at a level no higher than the temperature that allows addition of a vulcanizing agent line, and can perform secondary kneading immediately after the end of primary kneading. In a closed kneader provided with a chamber for storing kneaded material and a pair of rotors installed in the chamber, the proportion of the radius of the rotor shaft to the radius on the inner face of the chamber is kept at no less than 0.65.

Abstract: A method for the production of rubber mixtures in a ram kneader or in an aggregate combination of a ram kneader and a preferably thereunder disposed ram-less kneader includes applying a fluid in a surface covering application onto the mixture which has been handled in the ram kneader at the same time as during the mixing process at which there occurs at least one of an enlargement of its working volume, during the discharge process in which the mixture is discharged from the ram kneader, and during a time at which the mixture is in the ram-less kneader, the boiling point of the fluid being less than the desired end temperature of the mixture and the fluid being evaporated during the course of further working of the mixture in a manner in which no fluid remnants remain.

Abstract: In a method for controlling the mixing of dough ingredients in a mixer, dough ingredients are mixed. The amount of power supplied to the mixer is measured in specified time intervals. Data relating to the amount of power supplied are stored. Based on the stored data, a decline in the amount of power supplied to the mixer is identified and the mixer mixes the dough ingredients for a predetermined period of time after the decline is identified. A mixer of the present invention includes a mixing device, a motor coupled to the mixing device, a power source coupled to the motor, and a mixing-time controller.

Abstract: A large-volume reactor (10) for treating a free-flowing material, having a housing (12) which surrounds an interior space (14), a material feed (11) at one end of the housing (12) and a material discharge (13) at the other end of the housing (12). A rotor shaft (22), which is driven in rotation about its axis and conveys the material in the direction from the material feed (11) to the material discharge (13), is arranged in the interior space (14). A partition (16) in the interior space (14) defines two separate process spaces (18′, 18″) from one another, and the partition (16) includes a build-up system (24) having a build-up system passage (26) which leads from an inlet opening (40) which opens out into the first process space (18′), to an outlet opening (42) which opens out into the second process space (18″).

Abstract: Each mixing rotor for a batch mixer is rotatably insertable into a mixing chamber such that tip clearances are defined between tips of mixing blades and an inner surface of a mixing chamber and is provided on its outer circumferential surface with a plurality of mixing blades for imparting shearing forces to a material to be mixed by causing the material to pass through the tip clearances. The plurality of mixing blades include a nonlinear blade which is substantially nonlinear from a start point to a terminal point in a development of the mixing rotor developed into a plane about its longitudinal axis, and other linear blades which are linear in the development and whose helix angle to the longitudinal axis of the mixing rotor is set at 15 to 35°. An appropriate mixing control capable of realizing both sufficient mixing and sufficient dispersion can be executed by mixing and dispersing the material in a well-balanced manner by means of the mixing rotor.

Abstract: A kneading device kneads a main raw material of high viscosity and a secondary raw material of liquid or powder and continuously delivers a kneaded raw material obtained, and a ropesizer includes a sheet forming unit, and a delivering unit applies a second raw material onto a first raw material, which is elongated into a sheet shape and is conveyed by the sheet forming unit, so as to be in a strand form.

Abstract: The invention relates to a mixer-kneading device for carrying out mechanical, chemical and/or thermal processes, consisting of mixing elements (A, R) disposed on a shaft (2, 3), extending approximately in the longitudinal direction of the shaft (2, 3) or being somewhat inclined and comprising at least one scraping edge (14, 18, 21). Said mixer-kneading device is characterised in that clearance angles (w1-w6) are formed, respectively, in a direction leading away from the scraping edge (14, 18, 21) and which is opposite to the direction of movement of the mixer element.

Abstract: A device for making chewing gum with a mixer, in which gum base is kneaded and mixed with sugar and liquid components, such as glucose flavoring and/or coloring agents. Whereas this has been done until now using mixers that operate essentially in batches, now it is proposed according to the invention to use as a mixer a high-speed shearing mixer that is flowed through in the axial direction, in which many ring-shaped stator parts are arranged projecting radially to the inside on the inner wall of an essentially cylinder-shaped housing, with which the radial outside ends of circumferential mixing blades mesh to form grinding gaps. This device has the advantage that it is small, cost-effective and continuously productive.

Abstract: An apparatus for continuous stirring comprising a horizontal elongated cylindrical vessel and two rotating blade assemblies rotatable in the direction opposite to each other provided in parallel to each other in the vessel, where a liquid feed is moved from one end to another therethrough by rotation of the two rotating blade assemblies in the direction opposite to each other, while stirring and mixing the liquid feed, the two rotating blade assemblies each comprising rotor shafts (3a-3b or 3c-3d) supported at both ends of the rotating blade assemblies, support members (4) each fixed to the rotor shafts, connecting members (5) span between the support members (4) and in positions far from the substantial rotating shaft center and a plurality of plate-shaped stirring blades (6) arranged in parallel in the longitudinal direction of the substantial rotating shaft center and fixed to the connecting members (5).

Abstract: A stirrer for a planetary mixer has an upper central hub with two outwardly extending horizontal arms and two helical stirring elements, one depending from each arm. According to the presently preferred embodiments, the cross sectional area of the stirring elements is large enough that no bottom crossbar is necessary. The pitch angle of each stirring element is preferably constant from top to bottom. The leading side of the stirring elements has a flat surface whereas the trailing side is curved. The flat surface increases in size moving toward the bottom of the stirring element.