Abstract: A method changes the material from a feed mixture to a subsequent mixture in a feed device of an extruder, the method comprising the steps of detecting a change request for changing the material, emptying a mixing area of a mixing device of the feed device, identifying the completion of the emptying of the mixing area, and filling the mixing area of the mixing device with the subsequent mixture after the completion of the emptying has been identified.

Abstract: A flow exchanger (FE) system comprising: a supplement pump receiving a supplement first fluid stream and outputting a pressurized supplement first fluid stream; a flow splitter comprising a flow restrictor, wherein the flow splitter receives the pressurized supplement first fluid stream and outputs a power stream and a treatment stream; a main flow manifold, wherein the treatment stream enters the main flow manifold subsequent to passing through the flow restrictor; and an FE cylinder filled downstream with a second fluid and having a fluid interface separator (FIS), wherein the power stream enters the FE cylinder upstream; wherein the power stream engages and pushes FIS downstream, thereby providing for a second fluid stream entering the main flow manifold; wherein a second fluid stream VFR=a power stream VFR; and wherein the main flow manifold provides for a manifold output fluid stream VFR=a pressurized supplement first fluid stream VFR.

Abstract: A device for storing and mixing bone cement components. The device includes a housing, a safety device, and a vacuum indicator. The housing defines a mixing chamber configured to store a first bone cement component therein. In a first safety position, the safety device prevents contact between the first bone cement component and a second bone cement component in the mixing chamber. In a second safety position, the safety device permits contact between the first and second bone cement components in the mixing chamber. The vacuum indicator restricts movement of the safety device from the first safety position to the second safety position when in a first vacuum indicator position. The vacuum indicator permits movement of the safety device from the first safety position to the second safety position when in a second vacuum indicator position.

Abstract: A device for storing and mixing bone cement components. The device includes a housing, a safety device, and a vacuum indicator. The housing defines a mixing chamber configured to store a first bone cement component therein. In a first safety position, the safety device prevents contact between the first bone cement component and a second bone cement component in the mixing chamber. In a second safety position, the safety device permits contact between the first and second bone cement components in the mixing chamber. The vacuum indicator restricts movement of the safety device from the first safety position to the second safety position when in a first vacuum indicator position. The vacuum indicator permits movement of the safety device from the first safety position to the second safety position when in a second vacuum indicator position.

Abstract: Apparatus (20) for injection of fluid into extrusion system components such as a preconditioner (24) or extruder (100) is provided, preferably as a composite assembly including a fluid injection valve (52) and an interconnected static mixer section (54). Alternately, use may be made of the fluid injection valve (52) or static mixer section (54) alone. The invention greatly simplifies the fluid injection apparatus used in extrusion systems, while giving more efficient absorption of thermal energy with a minimum of environmental contamination, and the ability to inject multiple streams into the extrusion systems.

Abstract: A system for use in bone cement preparation can include a chamber for intermixing a liquid monomer and solid polymer components, a container, a vacuum channel, and a filter. The mixing chamber can be configured to hold a non-liquid, polymer powder component of a bone cement. The container can be configured to hold a liquid component of the bone cement. The system can have a first interface disposed between the mixing chamber and the container and a second interface disposed between the mixing chamber and the vacuum channel. The second interface can to receive and position the filter between the mixing chamber and the vacuum channel.

Abstract: An object of the invention is to improve capacity of process and not require a vent portion by an upper polygonal groove and a transition portion provided to a transport cylinder. A plastic extrusion method and apparatus according to the invention is a method and a configuration, in which an upper polygonal groove and a transition portion are integrally or separately provided to a transport cylinder so as to increase a frictional coefficient of an inner wall of the cylinder, to increase transport efficiency of a plastic raw material by a screw, and to allow at least gas, etc., pass toward a hopper side without using a vent portion.

Abstract: Process for extrusion of polymer by feeding a polymer feedstock to the feed port of an extruder having (i) two or more barrel sections arranged sequentially from (a) an upstream feed barrel section to which polymer feedstock to be extruded is fed, the upstream feed barrel section containing two screws each having a diameter of X, to (b) a downstream barrel section from which melted polymer is passed to a die and extruded, and (ii) a feed port for feeding polymer feedstock to be extruded into the extruder at its upstream end. The polymer feedstock is in the form of a powder, and the feed port area is a rectangular shape with width limited by the width of the upstream feed barrel section to 2*X and with a length greater than 2.5*X. The total area of the feed ports through which polymer feedstock is introduced is greater than 5*X2.

Abstract: A method for dosing a powder into a kneader is provided, wherein the powder is fed via a feeder-mechanism into a feeding hole of the kneader. The powder falls from an additional feeding device of the feeder-mechanism into one of at least four segments of a rotary valve of the feeder-mechanism.

Abstract: A system and method for extrusion of dough is disclosed. The system includes an auger for moving the dough; a metering pump comprising an input; a first motor for actuating the auger to transfer dough to the input of the metering pump; a first encoder for reading a position or speed of the first motor and for transmitting a signal associated with the position or speed of the first motor; and a controller configured to receive the signal from the first encoder to control operation of the first motor. The controller operates the first motor to at least partially counteract a variance in a pressure of dough at the metering pump based signals from the encoder and/or the pressure sensor.

Abstract: A method for plasticating and conveying macromolecular materials based on elongational flow and equipment thereof are disclosed. A set of spaces having specific shape is used, and the volume of the spaces can increase and decrease periodically, and the materials flow into the spaces when the volume is increasing; and are pressed, plasticated and discharged when the volume is decreasing, so that the plasticating and conveying process is mainly under normal stress. A vane-type plasticating and conveying unit mainly comprises a cylindrical hollow stator; a columned rotor eccentrically installed in the inner cavity of the stator, wherein a group of rectangular slots are formed along the circumference of the rotor; a plurality of vanes which are arranged evenly in the slots and baffles mounted on the two sides of the stator. The inner surface of the stator, the outer surface of the rotor, the two vanes, and the two baffles surround to form the spaces having specific shape.

Abstract: A polymer composition containing two kinds of polymers and having a difference in its glass transition temperature of 3° C. or lower between before and after heat-treatment by getting it through a space between two parallel faces in a molten state.

Abstract: A mixing/extruding apparatus having a mixer/extruder provided with a diverter, an electric motor for driving this mixer/extruder, and a power supply device for supplying a drive power to this electric motor, and the power supply device includes a start-up power supply portion for supplying a drive power with which the electric motor is rotated at low speed with a smaller output than an output generated upon the normal operation to the electric motor, an operation power supply portion for supplying a drive power with which the electric motor is rotated at high speed with the output generated upon the normal operation to the electric motor, and a power supply switching device for switching the drive power from the start-up power supply portion to be supplied to the electric motor to the drive power from the operation power supply portion.

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 gravimetric blender has a frame; a resin material storage hopper supported by the frame, including a hopper cover; a weigh bin located below the hopper for receiving resin material from the hopper downwardly discharging the bin contents after the contents have been weighed; a load cell, connecting the frame and the weigh bin, for sensing weight of the weigh bin; a mixer connected to the frame, below the hopper, for mixing received contents of the weigh bin; and a guide connected to the frame, for movement of the hopper cover therealong.

Abstract: A blending apparatus is provided, the blending apparatus including: an outer tube; and at least one inner tube disposed inside the outer tube, wherein a distal end, in a lengthwise direction, of the inner tube is located at an intermediate position, in a lengthwise direction, of the outer tube, and the inner tube has plural of through holes in a vicinity of the distal end thereof.

Abstract: A dough processing device has a support frame, a dough feed device, a dough portioning device, a dough kneading device and a dough transfer device. The latter transfers at least one dough portion from at least one portioning chamber of the dough portioning device to at least one kneading chamber of the dough kneading device during transfer time periods. An adjustment device serves for defining a vertical distance between the transfer device and the kneading chamber. This results in a dough processing machine in which a reliable transfer of dough portions from the at least one portioning chamber to the at least one kneading chamber is ensured even in the case of a high throughput.

Abstract: The invention relates to an apparatus and a method for the processing of plastic material, with a receptacle or cutter-compactor (1) into which the material to be treated can be introduced, in the lower region of which a discharge opening (10) is provided, through which the processed material can be ejected from the receptacle (1), for example into an extruder (11). According to the invention, the receptacle (1) is divided into at least two chambers (6a, 6b, 6c, . . . ) separated from each other by an intermediate base (2?, 2?, . . . ), wherein at least one mixing or comminution tool (7a, 7b, 7c, . . . ) is arranged which acts upon the material in each chamber (6a, 6b, 6c, . . . ), with which the material can be converted into a softened but permanently lumpy or particle-shaped and not melted state and wherein means (5?, 5?, . . . ) are provided which effect or permit an exchange or a transfer of the softened, lumpy, not melted material between each directly adjacent chamber (6a, 6b, 6c, . . . ).

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: Systems and methods for liquid dosing in blender systems are disclosed. An exemplary system includes one or more individual metering devices, each metering device including an individual material hopper for containing a granular material ingredient to be blended, a starve-fed mixing chamber coupled to the metering devices for receiving granular material ingredients from each metering device and mixing the ingredients, and a liquid ingredient dosing device disposed within the starve-fed mixing chamber for injecting a liquid ingredient into the path of the granular material ingredients as they fall through or out of the mixing chamber.

Abstract: A polymer composition containing two kinds of polymers and having a difference in its glass transition temperature of 3° C. or lower between before and after heat-treatment by getting it through a space between two parallel faces in a molten state.

Abstract: A method for plasticating and conveying macromolecular materials based on elongational flow and equipment thereof are disclosed. A set of spaces having specific shape is used, and the volume of the spaces can increase and decrease periodically, and the materials flow into the spaces when the volume is increasing; and are pressed, plasticated and discharged when the volume is decreasing, so that the plasticating and conveying process is mainly under normal stress. A vane-type plasticating and conveying unit mainly comprises a cylindrical hollow stator; a columned rotor eccentrically installed in the inner cavity of the stator, wherein a group of rectangular slots are formed along the circumference of the rotor; a plurality of vanes which are arranged evenly in the slots and baffles mounted on the two sides of the stator. The inner surface of the stator, the outer surface of the rotor, the two vanes, and the two baffles surround to form the spaces having specific shape.

Abstract: A blending apparatus is provided, the blending apparatus including: an outer tube; and at least one inner tube disposed inside the outer tube, wherein a distal end, in a lengthwise direction, of the inner tube is located at an intermediate position, in a lengthwise direction, of the outer tube, and the inner tube has plural of through holes in a vicinity of the distal end thereof.

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. Drive quantity changing means is disposed between the gate member and drive means.

Abstract: The invention relates to an electronic manager for bread dough mixers and to an operating method. The invention consists of an integral module (15) comprising a PLC (2) which, by means of relays (3, 4 and 5), controls a low-speed contact (8), a high-speed contact (9) and an electrovalve (10, 10?) in order to operate a mixer (14). In addition, the PLC (2) controls a temperature sensor (6), a flowmeter (7, 7?) and a visual and audible indicator (13). The corresponding method comprises a parameter definition step, a start confirmation step, an oxygenation step, a liquid metering step, a mixing step and a return-to-rest step.

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 apparatus for, and method of, mixing a molten composition are provided. The apparatus comprises a rotor with flow restrictors supported on its surface and supported within a bore of a casing. The mixer generates at least 100 modulating events as the molten composition flows over the flow restrictors to form a modulated composition.

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: An extrusion conveying apparatus, including an extruder that operates as a mixing device and is laterally supplied with components that are to be mixed, in particular components of a rubber mixture or thermoplastic elastomer. A volumetrically operating conveyor, in particular a gear pump, is connected to the output side of the extruder. A rotational speed or feed rate of the extruder is adjustable independently of the feed rate and volume flow of the conveyor. n?1 volumetric subsidiary conveyors are provided for passage of components therethrough where there are n components of a mixture. In particular component n is supplied in an undosed manner. A rotational speed or feed rate of the subsidiary conveyors is adjustable independently of the feed rate of the volumetrically operating conveyor.

Abstract: The Invention is a reinforced plastic sonar dome having a low acoustical insertion loss combined with sufficient mechanical strength. Acoustical and structural fibers are stochastically mixed and formed into a blended yarn. The blended yarn is woven into a blended fabric. The blended fabric is ordered into a stack having multiple layers of blended fabric. The blended fabric is incorporated into a polymer resin while the polymer resin is in liquid form using a vacuum assist. The acoustical fibers and the vacuum assist modify the acoustical properties of the resulting composite sonar dome.

Abstract: An apparatus and a method for injecting a liquid dye into a polymer melt, which includes a metering pump with a metering inlet and a metering outlet. The metering inlet connects to a dye tank and the metering outlet connects to a polymer melt carrying component. To add the liquid dye to the polymer melt in the melt carrying component in a quantity that is as uniform and accurate as possible, the invention provides for connecting the metering inlet of the metering pump to a feed outlet of a feed pump, which connects with its feed inlet to the tank. With that, it is possible to generate a feed pressure at the metering inlet of the metering pump, which can be adapted to an injection pressure at the metering outlet of the metering pump.

Abstract: In a conventionally used injection molding apparatus, undried resin pellet is put in a drier of a predetermined temperature and water and gas in the undried resin pellet is completely removed, and the dried pellet deprived of water and gas is thrown into the injection molding apparatus. It is therefore necessary to carefully control quality of water and gas of pellet before pellet is thrown into the injection molding apparatus. In injection molding of undried resin pellet, evaluate injected resin, control operation conditions such as the feeding amount of pellet and the decompression degree, and determine the best operation conditions and the best accumulation amount wherein excellent articles are obtained. The accumulation amount of pellet fed in an injection molding chamber is detected, and feeding to the injection molding chamber is controlled upon the detection information.

Abstract: An apparatus for manufacturing moldings by which clear colors and patterns can be brought out without a remarkable lowering of strength. Immediately before delivery to a metal mold, outer resin material positioned on the main cylinder inner wall side is put in the molten state, and inner resin material positioned on the main screw side is controlled to be from the softening temperature to the melting temperature both inclusive to be extrusion-molded as they are. The inner wall of the main cylinder is expanded where the outer resin material is received to help the outer resin material be thrown in smoothly.

Abstract: The present invention relates to a buffer tank as is substantially used for ensuring a constant supply of the spinning machine with a polymer melt in spinning machines. To this end the buffer tank is provided with a compensation chamber whose volume is variable in response to a pressure prevailing in the polymer melt and to a volume flow variation. The polymer melt flows from a polymer melt entry opening to a polymer melt exit opening through the compensation chamber. It is the object of the present invention to make the flow through the compensation chamber uniform. The residence time of the polymer melt in the compensation chamber shall thereby be prevented from having a wide range, the latter resulting in an irregular quality of the yarns produced by the spinning machine because of the time-dependent, mechanical and chemical properties of the polymer melt.

Abstract: A mixer for new and used materials includes a closed housing having a bottom formed with an outlet in which is fitted an outlet pipe, a top formed with a first inlet in which is fitted a first inlet pipe, and a side formed with a second inlet in which is fitted a second inlet pipe, the first inlet pipe having an inclined lower end, a cylinder mounted on one side of the closed housing and located opposite to the second inlet pipe, the cylinder having a piston rod extending into the closed housing and connected with a block, the block having an inclined top configured to close the inclined lower end of the first inlet pipe, and a valve mounted on a top of the closed housing and operatively connected with the cylinder.

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.