Abstract: There is provided a die plate, a resin machine, and a method of heating nozzles of the die plate that can suppress temperature unevenness of the nozzles and increase the temperature rise performance of the nozzles. The die plate includes a nozzle group including a plurality of nozzles through which molten resin passes, and a heating medium guidance part that guides a heating medium for heating a nozzle wall of each nozzle. The heating medium guidance part includes an inlet that receives the heating medium, an outlet that discharges the heating medium from a heating medium channel, and a guidance wall that defines a heating channel that causes the inlet and the outlet to be in communication with each other together with an outer peripheral surface of the nozzle wall of each of the plurality of nozzles.

Abstract: A system, an article of manufacture, and a method are disclosed. The system includes a set of components in an enclosure. The set of components includes electronic devices and airflow moving components configured to maintain airflow across the electronic devices from a front plenum of the enclosure to a rear plenum of the enclosure and direct air from the rear plenum through the first heat exchanger. The set of components also includes a first heat exchanger configured to circulate a cooling liquid and a second heat exchanger configured to maintain a constant temperature of the cooling liquid, wherein the constant temperature is a temperature of the cooling liquid within a threshold distance from a selected temperature.

Abstract: The invention relates to the field of 3D printing, particularly to the extrusion method (Material Extrusion), i.e., the layer-by-layer deposition of a molten building material through an extruder head (an extruder). The present device allows for using a wide range of materials when printing, such as liquids, pastes, and melts (including metals), as well as for using pre-treated secondary raw materials. An extruder has, within a single housing, a loading chamber and a removable working chamber having a three-sided rotor (piston) moving therein and an eccentric drive shaft, as well as an extruder tip connected to the housing, said tip having a removable nozzle on its end, a built-in heat sensor, and a built-in heating element. At least one heating element and heat sensor are disposed within the housing. The extruder is disposed on a mounting frame having a drive motor, and said frame fastens to a moving platform of a 3D printer.

Abstract: An improvement to surface marking devices for pumping and circulating melted thermoplastic material to various surfaces including roads, parking lots and the like is provided. The pump for melted thermoplastic is comprised of a cold section and a hot section. The hot section is connected to a fluid or electric motor, or alternatively, an internal combustion engine for providing rotation to the pump. The connection to provide rotation to the hot section is through the cold section, which is spaced away from the hot section and connected with shafting to provide rotation to the hot section. A heating jacket is secured to the hot section for transferring heat from an external source to the hot section. The spacing between the hot and cold sections provides the ability to rebuild the hot section of the pump without removal from the cold section and without removal from the vehicle to which it is attached.

Abstract: An extrusion facility (10) includes an extrusion screw (12), capable of providing a heat-softened viscous plastic material, and an extrusion (14). The extrusion head includes an annular chamber (24) that is capable of receiving viscous plastic material. The viscous plastic material, provided by the extrusion screw, has, at a constant temperature, a viscosity variable from a value ?i at a constant value ?cst during a given period so that ?cst>?i. A buffer chamber (16) between the extrusion screw (12) and the extrusion head (14) to store the viscous plastic material during the given period in order to enable the plastic material to reach the viscosity value ?cst before being injected into the extrusion head (14).

Abstract: A liquefier assembly for use in an extrusion-based additive manufacturing system, and a method for building a three-dimensional model with the extrusion-based additive manufacturing system, where the liquefier assembly includes a liquefier tube having multiple, independently heatable zones along a longitudinal length of the liquefier tube.

Abstract: Provided is a sheet forming die capable of finely controlling the flow rates of the respective divided flows of a molten resin with precision. The sheet forming die is a sheet forming die 3 configured to: receive a first molten resin B; to receive a second molten resin A; and to thus form a sheet-shaped resin-made product by discharging the molten resins A, B from a lip gap 15.

Abstract: In order to ensure quality of pellets by eliminating temperature differences among extrusion nozzle holes with use of a heating medium flowing through heating channels only once and flowing out through a heating medium outlet, provided is a die plate for resin granulation, in which a plate main body (1) is divided into regions (A to n) for every 360/n (n=4, 6, or 8) degrees, or into first to fourth regions (A to D) for every 90 degrees, and an inner annular heating passage (4) and an outer annular heating passage (5) are formed. A heating medium (F) supplied through a heating medium inlet (2) flows through heating channels (8) only once, and then flows out through a heating medium outlet (3) to an outside.

Abstract: An extrusion line for producing plastic profiles, preferably plastic pipes, comprising at least one extruder, one die, one calibration means and further following devices. The die has at least one aperture, and an extraction means arranged in front of the die as viewed in the extrusion direction, and the die consists of a plurality of functional regions with separate melt channels. Furthermore, the invention relates to increasing the cooling performance of an extrusion line for extruding a plastic profile, in particular a plastic pipe, which comprises the following steps, a) melting plastic in an extruder, b) shaping a plastic strand and feeding the plastic strand to a die, c) shaping a plastic profile by means of the die, and d) calibrating and curing by cooling the profile, the profile being cooled in the interior in addition to outer cooling.

Abstract: A die pre-heating system comprises at least one die oven, a robotic hoist and processing structure in communication with the hoist and the at least one die oven. The processing structure is configured to control the hoist to permit an extrusion die to be loaded into the at least one die oven and to be unloaded from the at least one die oven. The processing structure is also configured to cause the at least one die oven to operate according to a production formula for pre-heating an extrusion die loaded therein.

Abstract: A system for extruding one or more tread strips is described. The system includes an extruder having an outlet end connected to an extruder head for forming an elastomeric strip to a predetermined cross-sectional profile. The extruder head has an internal flow channel having an inlet end and an outlet end, wherein the flow channel has a first temperature zone and a second temperature zone. The temperature zones are used to adjust the conicity of the tread strips.

Abstract: An apparatus forms an elastomeric strip. The apparatus includes a roller and an adjustable surface. The roller has a cylindrical surface. The roller rotates at a predetermined angular velocity. The adjustable surface confronts the cylindrical surface and has a first stationary position relative to the cylindrical surface such that the apparatus forms an elastomeric strip having a first thickness. The adjustable surface is adjustably pivotable relative to the cylindrical surface such that the adjustable surface moves to a second stationary position for forming an elastomeric strip having a second thickness.

Abstract: A facility that is especially suited for the freezing of juices and similar products, which includes a cooling tank that supplies the product by means of an impelling pump to a freezing chamber that receives a supply of a liquefied gas at a temperature of around ?140° C., preferably nitrogen, and pressurized air through an electro-valve to transform the juice into micro-drops or pellets and to freeze the droplets or the pellets inside the freezing chamber, which then exit the chamber through one or more dispensing valves, said freezing not affecting the original characteristics of the juice, in terms of its vitamin, protein and enzyme content.

Abstract: A rotary die head for a film blowing machine for use with a starch-based biodegradable material including a core mould and an outer body. The core mould includes a spiral core mould sleeved on a center pivot and a rotary core mould fixed on the center pivot, jointed with each other. A motor drives the center pivot and the rotary core mould to rotate. The outer body includes an inner die casing sleeved on the spiral core mould, an outer die casing fit with the inner die casing, and a mouth die casing. The inner die casing, the mouth die casing, the spiral core mould, and the rotary core mould form a material flow and molding channel consisting of a herringbone feed-in slot, spiral conveying slots, an annular gap buffer zone, a tapering cone passage, an annular loosing cavity, and a final molding gap in turn from bottom to top.

Abstract: For the purpose of molding a multilayered film/sheet having a highly precise thickness of each layer, movable choker bars (31, 32) are movably arranged in the middle of molten resin channels (111, 112), and a plurality of choker adjustment bolts (35, 36) are arranged at a predetermined pitch in the die width direction. The choker bars with the choker adjustment bolts are moved so as to adjust the gap in a choker portion. Thermal conductors (37, 38) are provided with the respective choker adjustment bolts.

Abstract: A system and method are disclosed for producing a continuous filament reinforced thermoplastic profile having consistent cross section. A continuous reinforcing filament is pre-wetted with a first thermoplastic resin and introduced into a die, where it is contacted with a second thermoplastic resin extruded from an extruder at melt state. The temperature of the die is carefully controlled so that the pre-wetted filament and first resin do not cure or solidify until after they have contacted and mixed with the second thermoplastic resin. The mixture temperature is then controlled to make a substantially solidified profile pre-shape. A capping layer comprising a third thermoplastic resin is then coextruded onto the outer surface of the pre-shape. A multistage die for bringing together the filament and thermoplastic resins and for maintaining appropriate temperatures at each stage of the profile-forming process is also disclosed.

Abstract: An extrusion device for making spiral stripping electrical wires is disclosed to include a fixed mold member, which has a main flow path and a supplementary flow path for the passing of a first insulative material and a second insulative material, and a rotating mold member, which is rotatably supported on the front end of the fixed mold, having a mold hole axially connected to the outlet of the main flow path and one or multiple flow paths, each flow path of the rotating mold member having an outlet in communication with the mold hole and a common annular inlet disposed in communication with the outlet of the supplementary flow path for guiding the second plastic material spirally into the first plastic material to form a spiral strip in the insulator during extrusion of the two plastic materials with a conductor through the mold hole.

Abstract: A method of manufacturing an ink stick for use in a phase change ink jet imaging device comprises heating phase change ink material to an extrusion temperature at which the phase change ink material is in a malleable state. The ink material is then extruded through an extrusion orifice to form an extruded rail of ink. The extruded rail of ink is then roll formed to partially form a portion of a shape transverse to the extrusion direction as the rail of ink moves in the extrusion direction. A swaging process is then carried out to further form and divide the extruded rail of ink into ink sticks.

Abstract: Device for extruding hollow strands from thermoplastic material, with an extruder head, having a mandrel, and a calibrating device, for making a dimensional change while production is in progress, and with a radially adjustable inlet, at least one Ranque vortex chamber being formed in the mandrel, the cooling air outlet of which chamber leads into a cooling tube, which extends as an axial extension of the mandrel through the inlet of the calibrating device and has a cooling air outlet opening out into the calibrating device. This device achieves the object of providing a device with which effective interior cooling is achieved in calibrating devices designed for making a dimensional change while operation is in progress.

Abstract: A method for producing an extruded food product comprising from about 25% to about 77% meat and vegetable protein by continuously introducing components of the food product to an extruder wherein the components include meat and vegetable protein; mixing the components to produce a mixture in the extruder; heating the mixture in the extruder to produce the food product; extruding the food product from the extruder through the extruder die; and cooling the food product. The product may further comprise plasticizers and be substantially free of cross-linking compounds. Generally, the product is a meat analog having a fibrous texturized appearance characteristic of meat.

Abstract: High-capacity extrusion die assemblies (20, 90, 130, 140, 180, 252) each having a tubular sections (44, 146, 162, 268) and an elongated, axially rotatable, helically flighted screw section (56, 56a, 152, 168, 276, 278) which cooperatively define frustoconical, outwardly diverging material flow paths (75, 160, 291) at constant or differing divergence angles of from about 1-11°. The use of diverging tubular sections (44, 146, 162, 268) and screw sections (56, 56a, 152, 168, 276, 278) permits the use of larger die plates (76, 118, 292) with an increased number of die openings (80, 124, 296). This allows significant increases in extrusion production rates. The die assemblies (20, 90, 130, 140, 180, 252) can be used in the production of a wide number of human foods or animal feeds, and particularly aquatic feeds of the floating or sinking variety.

Abstract: A molten plastic extruded from extruding means 10 is formed into a strand 50 by a die 40, passed through an inner side of a cylindrical guide 60 erected vertically, thereafter, the strand 50 is successively cut uniformly to a constant length by a cutter 90 to form a pellet. A refrigerant for air cooling is circulated at a surrounding of the strand 50 passing through the inner side of the cylindrical guide 60 by cooling means 100 of the strand without being leaked to outside air.

Abstract: The present invention concerns a spinneret plate (1) for manufacturing a nonwoven fabric, having multiple non-round holes, which are similar to trilobal or multiarmed holes (3) in particular, for polymer flow outlet to produce filaments, in which identical holes are positioned in rows offset relative to one another. At least a first row (2) has a positional arrangement of the holes that differs from the positional arrangement of a second row (7) of rows through rotation of the holes.

Abstract: The invention refers to a micro-extrusion line that comprises a single screw (2) micro-extruder (1), a die (7), a cooling bath (17) and a haul-off (19), which together enables the manufacture of extruded profiles from small amounts of raw material. The rotation of the micro-extruder screw, together with the high temperatures created by the heater bands, produces the conveying, melting, mixing and pumping of the material through the die. The extrudate is cooled down in a bath containing a cooling liquid and winded in a coil (19), which has a linear speed higher than that of the extrusion, thus enabling the control of the extrudate cross-section.

Abstract: A method of designing and the resulting thermally stable heated coating die apparatus, the die apparatus including a die having a die geometry and a heating system with heaters and temperature sensors. The method and resultant apparatus provides minimized temperature gradients, flat die lip faces in a die to roll plane and a flat die in a plane perpendicular to die flat lip faces and parallel to substrate width. The method optimizes simultaneously: die geometry, placement of the heaters, placement of temperature sensors, and shielding from operating conditions, using heat transfer and structural numerical modeling and statistical analysis while considering die functionality characteristics, minimum increment of temperature measurement and control accuracy related to minimum acceptable deviation from flatness, coating die material of construction relative to thermo-structural material properties, and desirable coating die material properties.

Abstract: A coil surrounding only the tip of nozzles of a plastic extruding die is provided. By passing a high frequency current through the coil to selectively heat only the tip of the nozzles. Further, in a plastic extruding die in which a high frequency current is passed through a coil provided around nozzles to heat the periphery of the nozzles, the coil is formed of a conductor tube through which a coolant is caused to flow.

Abstract: A method and system are provided that efficiently compound high levels of inorganic filler, processing fluid and silicone polymer at a commercial rate into homogeneous filled and devolatilized silicone compositions. In the method, filled silicone compositions are compounded by compounding a filler, processing fluid and silicone polymer in a first compounding apparatus to produce a first dispersed composition and simultaneously compounding a filler, processing fluid and silicone polymer in a second compounding apparatus that shares a common extruder shaft with the first compounding apparatus to produce a second dispersed composition. The system comprises a first compounding apparatus and a sequential second compounding apparatus that shares a common shaft with the first compounding apparatus.

Abstract: A method and an apparatus capable of extrusion molding a comparatively wide, thin ceramic sheet using a screw extruder while suppressing the wrinkling thereof. The molding apparatus includes a screw-type extruder and a mold at the forward end of the extruder is used to extrusion mold a ceramic sheet from the ceramic material introduced into the extruder by way of the mold. The extrusion molding is carried out while regulating the temperature of the portion of the ceramic material passing through the mold corresponding to each of a plurality of areas (control zones) into which the mold is divided.

Abstract: An apparatus for smoothing and cooling of slit nozzle synthetic web passes the web following the smoothing gap between two rollers along a cooled surface and into contact with cold air introduced by cold air chamber open toward the roller surface.

Abstract: An extrusion process is described for the extrusion of a synthetic wood material. The process includes a significantly higher compression ratio through which the extruded product must pass. The higher compression ratio results in significantly improved product qualities.

Abstract: A pelletizing die includes a pelletizing die member with a die exit side exposed to cooling fluid and a die entry side for receiving polymer fed thereto. The die member has a plurality of polymer channels and a plurality of extrusion orifices connected to a respective one of the channels to form a extrusion orifice section. A heating medium system has additional heating medium conduits between channels and a supply and intermediate header for heating the channels (radially from each side) and providing once in and once out heating medium flow. The die member may be formed by high temperature brazing of components using coordinated solder (Ni based or gold-nickel) and component heat treatment temperature. A thin hard face coating may be provided on raised extrusion orifice ring faces around each extrusion orifice section.

Abstract: A novel apparatus for the preparation of a polymer solution includes a stirring device, an extruder connected to the stirring device, a cooling device connected to the extruder, and a warming device connected to the cooling device. The extruder is a fiber or membrane extruding die. Both the cooling device and warming device are vessels.

Abstract: An extruder includes a barrel having a die attached to one end and at least one material inlet with a feeder for providing material to the material inlet. At least one screw is rotatively mounted in the barrel, and a motor is provided for driving the screw. A plurality of sensors is mounted in the barrel for sensing passage of screw thread edges as the screw rotates. A controller for controlling operation of the extruder receives signals from the sensors and determines local torsional deformations of the screw based on the signals. The controller slows down the extruder if any one of the local torsional deformations falls outside of an optimal range.

Abstract: Methods and apparatuses are provided for the manufacture of coextruded polymeric multilayer optical films. The multilayer optical films have an ordered arrangement of layers of two or more materials having particular layer thicknesses and a prescribed layer thickness gradient throughout the multilayer optical stack. The methods and apparatuses described allow improved control over individual layer thicknesses, layer thickness gradients, indices of refraction, interlayer adhesion, and surface characteristics of the optical films. The methods and apparatuses described are useful for making interference polarizers, mirrors, and colored films that are optically effective over diverse portions of the ultraviolet, visible, and infrared spectra.

Abstract: A system and process for producing spunbond nonwoven fabric in which two or more polymeric components are separately melted and are separately directed through a distribution plate configured so that the separate molten polymer components combine at a multiplicity of spinnerette orifices to form filaments containing the two or more polymer components. Multicomponent filaments are extruded from the spinnerette orifices into a quench chamber where quench air is directed from a first independently controllable blower and into contact with the filaments to cool and solidify the filaments. The filaments and the quench air are directed into and through a filament attenuator and the filaments are pneumatically attenuated and stretched. The filaments are directed from the attenuator into and through a filament depositing unit and are deposited randomly upon a moving continuous air-permeable belt to form a nonwoven web of substantially continuous filaments.

Abstract: An extrusion system for extruding a layer of a plastic or rubber material onto a work piece without having to continuously adjust the extrusion system during the “set-up” mode to “full-run” mode, wherein the extruded layer exhibits a predetermined cross-section size and a uniform wall gauge concentricity.

Abstract: An extrusion molding apparatus includes a molding die (3) through which a plasticized and kneaded raw material (1), composed of a synthetic resin material having high heat-resistance and strength, is extruded to form a tubular body (51). The tubular body (51) is passed on a sizing die (4) to cool and harden the tubular body (51) and give it a final inner diameter. The molding die (3) and sizing die (4) are coupled to each other by a connecting pipe (6). The sizing die (4) is made of a carbon material. The connecting pipe (6) supplies a first air (81) to an interior of the sizing die (4). An air lubrication layer is formed between an inner surface (52) of the continuous product (5) and an outer surface (41) of the sizing die (4) by a second air (92) supplied to an interior of the molding die (3).

Abstract: An annular die designed to produce polymer foam using only one or more ambient gasses as a blowing agent includes an exiting channel with an exit having a cross-sectional area between about two and about ten times that of a smallest point within the exit channel. The section of the die from the smallest point to the exit is thermally isolated from the rest of the die, and the temperature thereof is independently controlled. In addition, the interior surface of the exit channel is coated with a friction-reducing coating.

Abstract: An apparatus and method for spinning a synthetic yarn, wherein a heated polymeric melt is extruded through a spinneret and the resulting filaments are combined and wound to a package by means of a take-up device located downstream of the spinneret. A cooling tube for the filaments is positioned below the spinneret, and an inlet cylinder which has a gas permeable wall is positioned between the inlet cylinder and the cooling tube. The cooling tube connects to an air stream generator in such a manner that an air stream develops in the cooling tube in the direction of the advancing yarn. The air stream is formed by a quantity of air that enters the cooling tube via the inlet cylinder, and the inlet cylinder is subdivided in the direction of the advancing yarn into several zones, each with a different gas permeability, for controlling the quantity of air entering the inlet cylinder. It is thereby possible to influence with advantage the precooling of the yarn and the formation of the air stream.

Abstract: A method and an apparatus for melt spinning a multifilament yarn from a thermoplastic material, wherein a spinneret extrudes the thermoplastic material to strandlike filaments, which are initially in liquid form and then cooled to cause their solidification. For purposes of cooling, the filaments are precooled in a cooling zone downstream of the spinneret in such a manner that the filaments do not solidify. Subsequently, the filament bundle advances by the action of a coolant stream directed in the direction of the advancing yarn into a tension zone and undergoes further cooling until the filaments solidify in a solidification zone within the tension zone. To maintain the location of the solidification zone within the tension zone in a predetermined desired range thereof, an adjustable cooling of the filaments within the cooling zone is provided.

Abstract: The invention relates to a resin tube that is inevitably buried during engineering works for electrical and communication line facility.

Abstract: A method and an apparatus for producing a highly oriented yarn (HOY) wherein the yarn is withdrawn from the nozzle of a spinneret at a withdrawal speed of at least 6,500 m/min. The filaments forming the yarn are drawn during their solidification, so that a highly oriented molecular structure forms in the polymer. To withstand the withdrawal tension generated by the high withdrawal speed without overstressing the filaments, the filaments are assisted in their advance before they solidify such that prior to the solidification a tensile stress relief is effective on the filaments, and that during the solidification a reduced withdrawal tension is effective on the filaments while they are drawn.

Abstract: A die and a die assembly are disclosed for use in association with an underwater pelletizer. The die has unique coiled heating elements which allow for uniform heating of the extrusion orifices which pass through the die, reducing or eliminating polymer solidification within the die, thereby allowing the manufacture of uniform pellets of a specific geometry. The heating elements are contained within the die plate of the die, and in a preferred embodiment occupy annular grooves formed therein which are concentric with the extrusion orifice pattern. The die assembly includes thermally-insulating adaptors and gaskets which cover the annular grooves containing the heating elements.

Abstract: An annular die designed to produce polymer foam using only one or more ambient gasses as a blowing agent includes an exiting channel with an exit having a cross-sectional area between about two and about ten times that of a smallest point within the exit channel. The section of the die from the smallest point to the exit is thermally isolated from the rest of the die, and the temperature thereof is independently controlled. In addition, the interior surface of the exit channel is coated with a friction-reducing coating.

Abstract: Processes and apparatus are provided whereby the morphology of bulked continuous filament (BCF) yarns can be variably controlled. More specifically, according to the present invention, the BCF yarn is melt-spun, drawn and textured, most preferably in a one-step spin-draw-texture (SDT) process, wherein prior to texturing, the yarn is subjected to a differential temperature condition. Most preferably, such differential temperature condition is accomplished using the duo rolls employed in drawing the BCF, such that one of the rolls is maintained at a greater temperature as compared to the other of the rolls. Most preferably, it is the upstream-most roll (relative to the general conveyance path of the filament toward the texturizer) which is the hotter of the duo rolls.

Abstract: A melt spinning apparatus for spinning continuous polymeric filaments including a first stage gas inlet chamber adapted to be located below a spinneret and optionally a second stage gas inlet chamber located below the first stage gas inlet chamber. The gas inlet chambers supply gas to the filaments to control the temperature of the filaments. The melt spinning apparatus also includes a tube located below the second stage gas inlet chamber for surrounding the filaments as they cool. The tube may include an interior wall having a converging section, optionally followed by a diverging section.

Abstract: Disclosed is an improved extrusion die assembly for controlling the flow of polymer in a melt extrusion process. The die assembly is useful for extruding low molecular weight polymer melts.

Abstract: A device for extruding multilayer plastic films, boards or tubes with a feed block, whose inputs are fed with polymer melts and which conveys the polymer melts from its inputs via individual layer channels to a slotted passage, forming its output. Temperature control units are arranged spaced part in the feed block along a width of to the individual layer channels for the purpose of heating or cooling.

Abstract: The invention relates to a device for the extrusion of plastic profiles with an extruder for the melting and delivery of a plastic material and with an extrusion die for defining the profile geometry, wherein a profile slot corresponding to the profile to be extruded and being defined by an outer periphery and by at least one arbor is provided in the extrusion die. The profile tuning is made easier by having a means for operational change of the profile slot's thickness provided in at least one predetermined area between the arbor and the outer periphery as well as a means for cooling selected areas of the extruded profile provided at the exit of the die.

Abstract: A method and apparatus for extruding pitch based foam is disclosed. The method includes the steps of: forming a viscous pitch foam; passing the precursor through an extrusion tube; and subjecting the precursor in said extrusion tube to a temperature gradient which varies along the length of the extrusion tube to form an extruded carbon foam. The apparatus includes an extrusion tube having a passageway communicatively connected to a chamber in which a viscous pitch foam formed in the chamber passes through the extrusion tube, and a heating mechanism in thermal communication with the tube for heating the viscous pitch foam along the length of the tube in accordance with a predetermined temperature gradient.