Abstract: There is provided a method for producing hydroxypropyl methyl cellulose phthalate (HPMCP), including an esterification step of reacting hydroxypropyl methyl cellulose with a carboxybenzoylating agent in the presence of an aliphatic carboxylic acid in a kneader reactor equipped with two or more stirring blades rotating around their own axes and orbitally revolving, to obtain a reaction product solution containing HPMCP; a precipitation step of precipitating the HPMCP by mixing the reaction product solution with water to obtain a suspension of the precipitated HPMCP; and a washing and recovery step of washing the HPMCP in the suspension and recovering the washed HPMCP. Further, there is provided HPMCP having yellowness at 20° C. of 10.0 or less, as determined in a 10% by mass solution of the HPMCP in acetone.

Abstract: A drive unit includes an actuator from which an output rod protrudes at one end of a cylinder and being coupled to a flap of an aircraft, an attachment disposed on the other side of the cylinder, a reaction link coupled to the flap at one end and to the attachment at the other end, and a connection-disconnection section allowing the cylinder and the attachment to be coupled to and separated from each other.

Abstract: Seal systems are provided that use a variety of seals to seal fluid processing apparatuses, such as gear pumps, to facilitate the prevention of a leakage of fluids from the respective fluid processing apparatuses. Fluid apparatuses that use such seal systems are also provided. Methods of uses, making, and assembly of seal systems are further described herein.

Abstract: An internal mixer includes a mixing chamber enclosed by a housing, a feeding neck in which a ram is guided, a closable discharge door, and an intermeshing rotor system, composed of a pair of rotors that can each be rotated about a rotor longitudinal axis, each rotor comprising a rotor main body on which at least one respective rotor blade is arranged, and the rotor blades of the two rotors meshing with one another, is to be refined in such a way that an improved, that is, faster, pull-in behavior is achieved, while optimizing the dispersion and distribution of the introduced materials. To this end, it is provided that in the case of at least one of the rotors, the rotor main body, at least in sub-regions, is non-cylindrical and has a non-circular cross-section, in the surface sections in which no rotor blades are arranged on the rotor main body.

Abstract: A device for kneading dough, in particular a kneading drum, has a rotationally driven inner kneading drum and a rotationally driven outer kneading drum. The inner kneading drum is arranged within the hollow outer kneading drum, in particular in a concentric. The device includes a kneading drive, by means of which the inner kneading drum can be driven or adjusted in an oscillating manner in the direction of the inner kneading drum axis relative to the outer kneading drum and/or so as to carry out a defined deflection at an angle about the axis of the inner kneading drum relative to the outer kneading. The outer kneading drum has a number of kneading recesses which are distributed over the circumference and/or along the length of the outer kneading drum in a uniform manner in.

Abstract: A single-screw extruder for changing a morphology of superabsorbent polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw in the invention has a first pitch value of a pitch of the screw flights along the conveying zone of the channel and, following in conveying direction, has a second pitch value of the pitch of the screw flights along the conveying zone of the channel, where the second pitch value is smaller than the first pitch value.

Abstract: A conversion device for converting linear movement in a stationary system into rotary movement about a pivot axis in a system which rotates about an axis of rotation that is not identical or parallel to the pivot axis. The conversion device has a lift element and a lift device with which the lift element can be moved with translatory movement relative to the stationary system. The lift element has first and second lift element portions connected together by a rotary bearing so that the first lift element portion can be rotated relative to the second lift element portion about the axis of the rotary bearing. The first lift element portion is connected to the lift device and the second lift element portion is connected to the conversion device. The conversion device is connected to a shaft positioned on the pivot axis so that a linear movement of the second lift element portion is converted into a rotary movement of the shaft about the pivot axis.

Abstract: A modular barrel and screw assembly for use in injection molding including a barrel having a barrel body, a separate barrel injection portion and a separate barrel end cap, with the barrel end cap being removably connected to the barrel injection portion and the barrel injection portion being removably connected to the barrel body, and a screw assembly having a screw tip assembly removably connected to a screw portion, wherein an injection chamber having a shot volume is defined by the barrel injection portion, the barrel end cap and the screw tip assembly. The modular barrel and screw assembly enables servicing of the barrel injection portion, barrel end cap and/or screw tip assembly without requiring removal of the barrel body, and enables use of a plurality of alternative corresponding separate barrel injection portions, separate barrel end caps and tip assemblies that provide a plurality of different shot volumes.

Abstract: A mould closing unit (100) for an injection-moulding machine has an electromechanical closing mechanism (M) for opening and closing an injection mould, said electromechanical closing mechanism (M) being actuated by means of at least one spindle unit (10) having at least one spindle (12) and at least one spindle nut (14). Cooling by way of cooling ducts (32) for heat dissipation from the spindle unit (10) is provided. Since the spindle (12) has, in the core, at least one bore (24) in which a cooling and/or lubricating medium is passed into the region of the contact points between the spindle nut (14) and the spindle (12) via at least one lance (20), efficient cooling of the spindle unit is achieved.

Abstract: A fluidic dispensing device includes a housing having an exterior wall and a chamber. The exterior wall has a first opening. The chamber has an interior space and has a port coupled in fluid communication with the first opening. A stir bar is located in the chamber. The stir bar has a rotational axis. A guide portion is located in the chamber. The guide portion includes a confining member having a guide opening that defines an interior radial confining surface that engages the stir bar, wherein the guide opening facilitates a radial movement of the stir bar in a direction substantially perpendicular to the rotational axis.

Abstract: An appliance for preparing animal feed, includes a housing, a mixing chamber designed to receive a portion of dehydrated feed and a liquid portion, mobile mixer arranged in the mixing chamber, a consumption chamber, wherein the mixing chamber is removable from the preparation appliance, wherein the mixing chamber, once mounted on the preparation appliance: is rotatable in order to pass from a position mixing the feed ration to a position dispensing the feed ration, and has a gripping portion which protrudes from the housing.

Abstract: A mixing and extrusion machine for tire sealant materials of the type comprising: a dump extruder equipped with conical converging twin screws located in a batching chamber, said chamber having a low pressure feeding area and a high pressure ducted area; a removable blind flange for temporarily sealing the outlet of said batching chamber so that said material is forced to recirculate between said duct area and said feeding area within said batching chamber, said chamber thereby also acting as a compounding chamber; and an inlet port located in the high pressure ducted area, the inlet port capable of introducing a diluent during mixing of a tire sealant material.

Abstract: A vertical household noodle maker includes a base, a stirring container connected to the base, a stirring rod longitudinally arranged in the stirring container, an extrusion cylinder horizontally arranged at one side below the stirring container, a spiral rod arranged in the extrusion cylinder, an extrusion die and a control unit. The stirring rod includes a rod body and a stirring blade. The motor rotates the stirring rod and the spiral rod, and a feeding inlet in communication with the extrusion cylinder is provided at a bottom of the stirring container. An inner wall of the stirring container is provided with a cutting rod, and a projection of the cutting rod at least partially overlaps with a projection of the stirring blade in the horizontal direction when the stirring blade is driven by the motor to rotate to a position of the cutting rod.

Abstract: An injecting machine includes an injection cylinder, a plunger, a plunger moving mechanism, and a mixing mechanism. The plunger is reciprocally received in the injection cylinder for moving between an advanced position and a retracted position, with the injecting a liquid mixture of two different liquid materials as the plunger moves to the advanced position. The plunger moving mechanism causes the plunger to move between the advanced position and the retracted position. The mixing mechanism is disposed on the injection cylinder for mixing the two different liquid materials together to feed the liquid mixture into the injection cylinder. The plunger includes a front portion having a helical groove formed on an outer circumferential surface thereof to allow the liquid mixture fed from the mixing mechanism to pass through the helical groove for collecting in a forward space formed forward of the front portion of the plunger.

Abstract: A method of forming a tread comprising two or more layers of rubber is described. The method includes the steps of: extruding a rubber compound through an extruder and a gear pump and mixing with an accelerant and then applying a continuous strip of rubber directly onto a tire building machine to form a first layer of rubber having a first cure rate; adjusting the amount of accelerant to obtain a second cure rate different than said first cure rate, and then applying a strip of rubber having a second cure rate onto the tire building machine, wherein one of the cure rates is faster than the other cure rate.

Abstract: A bowl for a kneading machine includes a bottom provided with an opening, a discharge device equipped with a plug, and an actuator configured for moving the plug between a position for closing the opening, in which the latter is engaged by the plug, and a position of discharge of the bowl, in which the opening is disengaged from the plug so as to be able to discharge through it the dough prepared in the machine. The actuator is a linear actuator configured for moving the plug, and cam means are configured for guiding movement of the plug along a path comprising a horizontal rectilinear stretch.

Abstract: An internal batch mixer is provided with: a casing within which a material is mixed; a door which opens and closes a material discharge opening of the casing by being rotated about the axis thereof and closes the material discharge opening when in a closed state; and a latch mechanism which, when the material is mixed in the casing, holds the door in a latched state, the latched state being a state in which the material discharge opening is being closed by the door and cannot be opened, and which, when the material having been mixed in the casing is discharged from the inside of the casing, releases the door from the latched state. The latch mechanism is provided with a linear actuator which has a movable section capable of moving linearly and moves the movable section to the door side to supply power to the latch member, the power causing the latch member to move to the door side, and a linear sensor for measuring the distance of linear movement of the movable section caused by the linear actuator.

Abstract: In a rubber extruder, a rubber sample is sampled while the rubber extruder is operating. In a rubber extruder formed of a cylinder and a screw arranged in the cylinder, a rubber sample taking-out path is provided in the vicinity of an outlet-side end portion of the screw and in front of a rubber taking-in port of a pair of gears of a gear pump. A path opening/closing means including a ball valve which opens/closes the rubber sample taking-out path is also provided so that a part of rubber extruded by the screw is taken out as a sample by opening/closing the ball valve at predetermined timing.

Abstract: A device for separating a plurality of doses of plastics from a plurality of extruder outlets (2,3) comprises a movable element that carries two groups of dose separating elements (A) wherein at least a first group is movable with respect to at least a second group. The separating device expels the doses in a circular arrangement for subsequent compression moulding of a liner (17,18) for a container closure (C).

Abstract: A kneading machine is provided having a kneading tank with kneading rotors therein and a stocking opening. The kneading machine may also include a pressurizing lid for opening and closing the kneading tank and an inner-pressure cover. The kneading tank is capable of inverting in a range of 90° to 120° for discharging the kneaded materials. A front wall defining the stocking opening may be attached so as to be suspended downward from the kneading tank by a hinge when the kneading tank is inverted. The kneading machine may also include a capturing apparatus with a duct connected to the inner-pressure cover to capture powder compound jetted into the inner-pressure cover, and the powder compound captured in a filter of the capturing apparatus can be collected into the kneading tank.

Abstract: A device for applying a coating includes a multi-component cartridge, a static mixing nozzle in fluid communication with the cartridge, and at least one paint applicator selected from the group including a roller, a brush, and an angled spray tip, in fluid communication with the nozzle. A method includes applying a coating to a surface with the above-described device. Another method includes applying a non-skid coating to a surface with the above-described device.

Abstract: The present invention provides kneading/extruding equipment capable of stable operation by keeping the pressure of kneaded material before a first-stage gear pump in steady operation (molding) and preventing fluctuation of the pressure of kneaded material before the first-stage gear pump constant from largely affecting the pressure of kneaded material before a latter-stage gear pump at start-up or upon change of production rate, and thus capable of responding to an increase in production rate while securing a high-quality molded product, and an operation control method thereof. The kneading/extruding equipment comprises: a rotational speed feedback control unit for a first gear pump, which feedback-controls the rotational speed of the first gear pump, and a rotational speed feedforward control unit for a second gear pump, which feedforward-controls the rotational speed of the second gear pump.

Abstract: A dough preparing machine operable to mix and divide dough so as to form a plurality of individual loaves of bread in a relatively compact space is provided. The dough preparing machine includes a compressing and dividing device, a bowl, a pivotable mixing arm, a rounder, and a sheeter molder. The dough preparing machine further includes a transfer device having a first arm and an opposable gripper operable to handle the rounded individual balls of dough. The compressing and dividing device configured to press the dough uniformly within the bowl, and divide the compressed dough into individual balls of dough.

Abstract: A mixing apparatus for manufacturing a rubber compound is disclosed. The mixing apparatus comprises a plurality of multiple shaft extruder devices, each comprising at least one inlet for receiving a plurality of materials to be fed into the extruder device and an outlet for discharging a mixed material extruded by the extruder device. The multiple shaft extruder devices are either arranged in such a way that operatively the extrudate of at least one of the plurality of multiple shaft extruder devices can be fed into the inlet of at least one other of plurality of multiple shaft extruder devices, or are arranged to operate in parallel in such a way that operatively the extrudates of the plurality of multiple shaft extruder devices can be fed together into the inlet of at least one further mixing device.

Abstract: A batch mixer is equipped with a plunger for pushing material from the batch mixer. The batch mixer includes a mixer tank structured to accommodate material. The mixer further includes a mixer head comprising at least one blade structured to blend the material within the mixer tank. The mixer further includes a plunger mechanism structured to push the blended material directly from the mixer tank.

Abstract: The present invention relates to a device for producing a hardenable mass, preferably bone substitute and/or bone reinforcing material or bone cement or similar material. A mixing container may include a mixing space in which at least one powder and at least one liquid component are mixed to provide the hardenable mass. A piston may be provided in the mixing space of the mixing container. A screw device may be connectable to the mixing container such that the screw device may be configured to impart by screw movements a discharge movement to the piston to discharge the hardenable mass from the mixing space.

Abstract: A check valve (36, 136) for a screw (24) is provided. The check valve (36, 136) includes a retainer tip (54, 154), operable to be attached to a distal end of a screw shaft (52, 152), the retainer tip (54, 154) defining at least one melt channel (30). A first ring (60) is coaxially mounted to and rotationally-coupled with the retainer tip (54, 154). A second ring (66) is coaxially and slidably mounted to the retainer tip (54, 154), and is operable to rotate relative to the retainer tip (54, 154). The second ring (66) is operable to reversibly move between an open position which permits melt to flow through the check valve (36, 136) and a closed position which prevents backflow of the melt.

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 cutting mechanism is mounted to a tub of a dough mixing apparatus including an internal mixing chamber having a rotatable agitator assembly for forming dough. After the dough is formed, the tub is rotated and the cutting mechanism is automatically shifted from a non-cutting position, wherein an elongated blade element of the cutting mechanism is located remote from the agitator assembly so as to not interfere with the dough forming process in the internal mixing chamber, to a cutting position, wherein the elongated blade element is arranged directly adjacent an operational path of mixing elements of the agitator assembly to slice the dough, whereupon the dough readily falls from the agitator assembly for enhanced discharge of the dough from the tub. The cutting mechanism can be integrated into a breaker bar or separately mounted in the tub.

Abstract: A clay mixing apparatus includes a mixing chamber, a rotor arranged within the mixing chamber, a drive unit arranged to rotate the rotor, an ejecting unit, a pressure reducing unit; and an exhaust flow path. The rotor includes a shaft rotated by the drive unit, an extruding member and a mixing member. The mixing member includes a plurality of arms and a plurality of blades arranged at tip ends of the arms. The exhaust opening is opposed, in a radial direction about the center axis, to a portion of the mixing member lying near the extruding member and/or a portion of the extruding member lying near the mixing member.

Abstract: In a process for treating viscous products, especially for performing polymerization processes, especially for homo- or copolymerizing thermoplastics and elastomers, wherein monomer(s) and/or catalysts and/or initiators are added to a backmixed mixing kneader, especially with a length/diameter ratio of 0.5-3.5, heat is supplied to the product which is backmixed with already reacted product and the reacted product is removed from the mixing kneader, the product in the mixing kneader shall be heated up to its boiling temperature, portions of the product shall be evaporated and exothermicity of the product shall be absorbed by evaporative cooling.

Abstract: A kneading machine is provided having a kneading tank with kneading rotors therein and a stocking opening. The kneading machine may also include a pressurizing lid for opening and closing the kneading tank and an inner-pressure cover. The kneading tank is capable of inverting in a range of 90° to 120° for discharging the kneaded materials. A front wall defining the stocking opening may be attached so as to be suspended downward from the kneading tank by a hinge when the kneading tank is inverted. The kneading machine may also include a capturing apparatus with a duct connected to the inner-pressure cover to capture powder compound jetted into the inner-pressure cover, and the powder compound captured in a filter of the capturing apparatus can be collected into the kneading tank.

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: The invention relates to a device and to a method for mixing substances, wherein a substance to be treated is pressed with a press piston (3, 4) through a nozzle block (6) arranged between two press cylinders (1, 2). During the mixing, a fixed mixture constituent in the form of a suspension (13) is fed to the substance to be treated. The substance to be treated may be cooled during the mixing process by way of stepwise, controlled evaporation of a process fluid. Preferably, several, differently designed, exchangeable nozzle blocks are used, in order to adapt machine conditions to the changing viscosity of the substance to be mixed. The invention also relates to a mixing reactor and to a method for the continuous discharge of a product. For this, several mixers and an extrusion press are arranged next to one another and connected to one another via a transfer vehicle.

Abstract: An apparatus and method for melting polymer is provided. In at least one embodiment, the apparatus includes a housing, two or more rotatable members at least partially contained within the housing, where each rotatable member having a shaft coupled thereto. The apparatus also includes a motor having a drive shaft directly coupled to the shaft of the rotatable members such that the rotatable members rotate at a speed of the motor drive shaft. The rotatable members are preferably non-intermeshing and counter-rotating.

Abstract: A clay kneader has a drum having a pressure raising section on a supply opening side, an extrusion section having an inner diameter smaller than that of the pressure raising section on side of an extrusion opening for extruding clay as a columnar article, and a flow controlling section located between the pressure raising section and the extrusion section and being equipped with a supply opening for clay, a screw having a rotary shaft having a diameter which gradually decreases toward the extrusion opening in the flow controlling section and being ended around a boundary between the flow controlling section and the extrusion section, and a helical rotating blade provided along the rotary shaft for kneading the clay a rotary shaft.

Abstract: An installation for fabricating a mass of rubber comprises a vessel for compounding the mass of rubber. The vessel includes an outlet opening for the mass of rubber; a gate for closing the opening and movable between a position in which the opening is closed, and a position in which the opening is disengaged; scraper means for scraping the rubber adhering to a so-called internal surface of the gate, this device including a movable scraper member comprising an edge designed to scrape the rubber adhering to the internal surface; and synchronization means for synchronizing the movements of the gate and of the scraper member.

Abstract: An extruder system includes an extruder for axially extruding a rubber or plastic material in a barrel. A gear pump adjusts an amount of extruded material that is discharged by engagement of gears. The gear pump includes a driving pinion and a driven pinion engaged with, and driven by, the driving pinion. A gear casing accommodates the pinions and includes side plates on both axial sides of the pinions. A casing body is arranged between the side plates and encloses a space on a radially outer side of the pinions. The side plate includes a suction side plate that has a suction port arranged opposite to that side of engagement region between the pinions and a discharge side plate that has a discharge port arranged opposite to that side of engagement region between the pinions. The suction and discharge ports are maintained out of axial communication with each other.

Abstract: An apparatus and method for melting polymer is provided. In at least one embodiment, the apparatus includes a housing, two or more rotatable members at least partially contained within the housing, where each rotatable member having a shaft coupled thereto. The apparatus also includes a motor having a drive shaft directly coupled to the shaft of the rotatable members such that the rotatable members rotate at a speed of the motor drive shaft. The rotatable members are preferably non-intermeshing and counter-rotating.

Abstract: An extruder 10 comprises a barrel 12 and a screw 24 mounted in the barrel for rotation. The screw comprises screw threads 26a, 26b, 26c. The barrel has an inlet funnel 22 toward one end for material to be extruded and a die plate 18 with openings 20 at the other end and an air inlet port 28 toward one end of the barrel and an air outlet port 30 toward the other end. The screw threads are such that material 34 in the barrel is moved more quickly along the portion of the barrel between the air inlet port and the air outlet port than upstream of that portion. The air outlet is connected to a pump 32 so that there is a pressure difference between the air inlet and the air outlet.

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 method and apparatus for controlling the removal of polymer from a mixer using an outlet gate that is coupled to an actuator by way of a pair of flanges, one flange carrying a protuberance and the other flange carrying a depression into which the protuberance fits in a sliding manner.

Abstract: A device for applying a coating comprises at least two cylindrical cartridges, a static mixing nozzle in fluid communication with the cartridges, a spray tip, in fluid communication with the nozzle, a first flexible hose disposed between and in fluid communication with the nozzle and the spray tip, and a second hose, in fluid communication with the spray tip, for supplying atomization air to the spray tip. Methods of applying coatings with the device are also provided.

Abstract: There is provided a dispersion method of stirring a material to be dispersed in a cavity of a container, so as to create a laminar flow of the material by the stirring action, and a dispersing apparatus including a bottom member and a column-shaped rotating shaft that rotates in the cavity of the container, in which the rotating shaft is provided with two vanes attached thereto with a predetermined inclination, at positions circumferentially spaced by 180 degrees, and the vanes are located at non-overlapping positions in an axial direction.

Abstract: A method and apparatus for controlling the removal of polymer from a mixer using an outlet gate that is coupled to an actuator by way of a pair of flanges, one flange carrying a protuberance and the other flange carrying a depression into which the protuberance fits in a sliding manner.

Abstract: In a continuous mixer, a chamber formed in a barrel comprising a feed port for feeding raw material to be mixed on one end side and a discharge port for discharging mixed material on the other end side. A pair of screw provided in the chamber has a feed part for conveying raw material to be mixed which is fed through the feed port and a mixing part for mixing the raw material. The barrel is provided with a raw material discharge port for communicating the position corresponding to the feed part in the chamber to the outside of the barrel, and an opening/closing cover for freely opening and closing the raw material discharge port. The screw can be rotated reversibly. Even though large amounts of raw materials to be mixed may stay in the chamber due to an emergency stop, the raw materials can be easily discharged from the raw material discharge port.

Abstract: A method comprising extrusion compounding a styrenic polymer and a layered compound to produce a composite, and orienting the composite to produce an oriented composite wherein the layered compound comprises natural clay, synthetic clay, natural colloid, synthetic colloid, natural sol, synthetic sol, natural gel, synthetic gel, natural fumes, synthetic fumes, or combinations thereof. A method of preparing an oriented film comprising extrusion compounding a styrenic polymer and a clay to produce a nanocomposite, casting the nanocomposite into a film, and orienting the film in at least one direction.

Abstract: An extruder for viscous masses, and including an extruder screw and a positive-displacement gear pump disposed downstream of the extruder screw as viewed in the conveying direction. The positive-displacement gear pump has at least one conveying gear and at least one positive-displacement gear. The axis of the conveying gear is disposed essentially at right angles to the axis of the extruder screw, and the axis of the positive-displacement gear is disposed essentially in the same direction as the axis of the extruder screw.

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: Disclosed are: an apparatus for kneading a rubber material which continuously performs a series of processes which are kneading a rubber material with a non-vulcanization compounding agent at the beginning, kneading it with a vulcanization compounding agent, and finally obtaining final kneaded rubber; and a kneading method using this kneading apparatus. Preparatory kneaded rubber having been kneaded in one internal mixer is selectively fed, by a distribution conveyor, to a group of kneading lines where at least two kneading lines are provided to be arranged side by side. Each of the kneading line consists of a plurality of open roll mixers serially connected with each other. Intermediate kneaded rubber resulted in having a target viscosity after having been kneaded in the group of kneading lines is kneaded with a vulcanization compounding agent, whereby final kneaded rubber is obtained.