Abstract: The invention concerns a machine for making, cutting and shaping pasta, including at least one unit head for making, cutting or shaping pasta, in which is installed at least one pair of rollers, adjacent to each other and rotating around their respective substantially horizontal and parallel axes; it is equipped to process dough into sheet form or a sheet in the form of pasta, including, according to the invention, a hopper detachably fastened to the unit head to feed dough composed of flour and eggs or a sheet of pasta into the unit, this being without manual intervention of the operator after the introduction of the dough or sheet of pasta between the rollers in the unit head.

Abstract: A filter member includes a breaker plate having an increased filtering area without any deterioration in screen back-up capability. This filter member is adapted to filter off impurities of resin melt and is disposed in a resin passage. The filter member includes a screen and a breaker plate for backing up the screen. The breaker plate has resin passageways in the form of elongated slits extending as intersecting the flow direction of resin material.

Abstract: Filtering apparatus includes two or more passages (2) acting in parallel, each having an extended filter (12) which passes through inlet and outlet ports (48, 49), flowable preferably sealed by solidified plugs of the flowable substance such as a polymer being filtered. The flow of such substance to one passage can be terminated so as to permit filter advance under conditions of zero pressure drop, whilst flow through the other passage continues. Filter advance can be assisted by extrusion of a sealing plug in the outlet port under the pressure of such substance from the other passage which is still filtering. In additional or alternative mode, flow into a passage is terminated and a secondary outlet (20, 21) in that passage is opened. This creates a counterflow under the pressure of substance from the other passage, which cleans the filter. The secondary outlet can be sealed by a plug which is extruded during counterflow.

Abstract: An apparatus for melting particulate polymeric material includes a melting grid and a molten polymer reservoir beneath the grid. The apparatus has a lateral cross-sectional contour defined by walls. Further included is a distribution device having upper and lower surfaces and adapted to the contour of the molten polymer reservoir, which device is disposed in the molten polymer reservoir in proximity to the grid. The device has an internal reservoir formed between the upper and lower surfaces; a perimetrical surface joining the upper and lower surfaces and providing the device with height; at least two fluid distribution pores, each having one end in communication with the internal reservoir and another end disposed in the circumferential surface; and an injection tube providing fluid flow communication between the internal reservoir and an external supply of fluid.

Abstract: A multi-stage vacuum kneading-extruder includes a degassing chamber for storing material to be processed and reducing pressure of space for storing the material, a kneading-conveyer device for kneading while conveying the material sent from the degassing chamber, and an extruding mechanism for extruding the kneaded material, at a conveyer terminal end of the kneading-conveyer device, into a predetermined shape. The kneading-conveyer includes a pair of conveyer screws disposed one after another in a conveying direction of the material and a grinding-kneading mechanism interposed between the front and rear screws. The grinding-kneading mechanism includes a plurality of unit kneading mechanisms disposed in opposition to each other relative to the material conveying direction. Each of the unit kneading mechanisms includes an un-rotatable stationary disc, a rotary disc rotatable relative to the stationary disc and a stationary filter interposed between the stationary and rotary discs.

Abstract: An apparatus for controlling and filtering the flow or viscous fluid in a material melting and dispensing device is disclosed. The apparatus includes a rotatable valve assembly having a filter plate and a flow stoppage plate. Rotation of the valve alternately allows or halts the flow of viscous fluid. The convenient ability to block the flow of viscous fluid such as hot melt adhesive at a point immediately downstream of a hopper or material melt space facilitates repair, maintenance, or removal of other downstream elements such as a pump without the need for draining the hopper, while avoiding excessive spillage of hot melt adhesive.

Abstract: A filter and pressure relief assembly for an adhesive supply unit comprises an adhesive supply hopper (12), a filter basket (20) disposed within a cavity (18) defined within a filter block (16), and a filter plug (22) for retaining the filter basket (20) within the filter block (16). Inlet port (32) provides an infeed of adhesive from the hopper (12), an outlet port (36) leads to an applicator, and a return port (54) and conduit (56) return adhesive back to the hopper (12). The filter plug (22) contains a pressure relief valve (44) which opens and connects the inlet port (32) to the return port (54) and conduit (56) so as to return adhesive to the hopper (12) under over-pressurized conditions, and a pair of O-ring members (100, 102) for respectively engaging small and large diameter regions (104, 106) of the cavity (18).

Abstract: A supporting plate is described for a filter in a fluid filter device, said filter being essentially perpendicular to the flowing direction of the fluid, said supporting plate containing a large number of holes which pass from the front side of the plate to the rear side. Each hole (8) provides in the area of the front side (6) and/or in the area of the rear side (7) a distal section (16, 17) which is increased relative to the smallest cross-section of the hole (8), whereby this distal section (16, 17) is of such a shape, that the total surface of the edges (13, 14) between the holes (8) is decreased.

Abstract: The present invention concerns an on-the-fly long-running rotary filtration screen device, wherein a split-flow bar and a filtration sleeve are screwed together to form a filtration bar, a filtration screen is inserted onto the cylinder on the filtration sleeve, the cylinder is equipped with round holes, the split-flow bar is equipped with two square slots facing opposite from each other, a large gear to be installed onto the split-flow bar also possesses identical square slots, so that the split-flow bar and the large gear are attached to each other by means of inserting two square keys into the two square slots and then inserting a stopping disc, the bottom of the main housing is equipped with a circular sunk slot connecting to an outlet housing, a residue-removing rod is inserted into a round hole at the lower part of the main housing and, after actuating a motor, the rotating large gear causes the filtration bar to rotate, the action of a hydraulic cylinder pressing against a round rod at the front part o

Abstract: Spinning head for spinning polymer melts, having a filter cartridge made of a seamless metal cloth cylinder having an end cap and a connector, said cartridge being disposed within a melt passage having a conical taper toward the bottom. The connector is inserted into the melt channel and has a matching conical shape to seal against the channel wall. A die plate having a maximum area of 90 cm.sup.2 connects to the connector. An opening through the connector permits filtered polymer melt to flow from the filter cartridge through the connector to the die plate. A single filter cartridge is provided for each die plate, whereby the ratio of filter area to die plate area is at least 0.5:1.

Abstract: A vacuum kneading and extruding method includes the steps of separately and continuously measuring plural types of material and continuously feeding the material into a kneading and degassing tank; kneading the plural types of material fed, and degassing the material by decompressing a material accommodating space into a vacuum; kneading and transporting the material in a decompressed condition through a multi-stage kneading mechanism; and forming and extruding kneaded material in a predetermined shape. An apparatus for use in executing this method is included.

Abstract: A filter is inserted into a cylindrical hole of a nozzle body 1. The filter has an axial blind hole, which communicates with transverse or radial holes. The transverse holes open into peripheral longitudinal trap channels, which are axially open against a collection space. Via slot-like openings, the trap channels are connected to second or clean channels, which communicate with an outlet opening of the nozzle body. A flushing opening, which can be closed by a screw, leads from the collection space to the outside. When foreign bodies have accumulated in the trap channels, the flushing opening is opened, and the foreign bodies are flushed out with an injection stroke. As a result, the foreign bodies can be removed rapidly and in a simple manner.

Abstract: The invention relates to a filter device for extruders and injection-molding machines, the screen elements being formed by a candle filter and, if required, by a plurality of candle filters, which are arranged in the circumferential direction on the screen plunger, extending parallel to the longitudinal axis of the screen plunger, and are flowed through from the outside inward for filtering purposes and from the inside outward for backwashing purposes.

Abstract: A cooking-extruding apparatus and method for the cooking-extrusion of biopolymers for the production of thermally treated food granulates, snack products, cereals or similar products. The cooker-extruder having a feeding hopper, a conveying screw, an exit nozzle, and at least one spatula-pump disposed between the conveying screw and the exit nozzle. Each spatula-pump includes a spatula element and plate having a matrix of holes. In operation, the spatula element assists the material being processed through the plate having a matrix of holes. An embodiment of the apparatus of the present invention includes the use of two conveying screws. The spatula-pumps are arranged serially such that the material being processed passes through one spatula-pump to the next until it is passed through the exit nozzle of the apparatus.

Abstract: An extrusion apparatus and method for producing a composite profile strip characterized by an extrusion head having plural flow channels extending to an extrusion die and at least two extruders for feeding respective components at respective different pressures into the flow channels for passage to the extrusion die. The extrusion die has a common die outlet from which the components are discharged to form the composite profile strip, and respective flow restriction devices are disposed in the flow channels between the extruders and the extrusion die. The flow restriction devices are operative to decrease the difference in pressure between the components before being brought together at the extrusion the extrusion die and further to dampen the effect changes in extruder speed has on the profile of the composite profile strip.

Abstract: A filter apparatus for synthetic plastics material melts containing impurities comprises a housing (1) in which a cylindrical or conical filter element (3) is bearingly supported for rotation around its longitudinal axis (4) by a drive means (8). The outer periphery (15) of the filter element (3) is engaged by a scraper element (20) which surrounds the filter element (3) along a helix line or a spiral line. The material to be filtered is supplied from the outside through an inlet opening (12) to the filter element (3). The filtered material penetrates openings (18) of the filter element (3) and flows into a central hollow space (17) thereof wherefrom it is carried off through a discharge opening (18). The impurities cannot pass the opening (16), gather on the outer periphery (15) of the filter element (3) and are carried by the stillstanding scraper element (20) towards an exit (24). Thereby a reliable construction is achieved which requires less effort (FIG. 1).

Abstract: In a mechanical cell for blending elastomer particles and solution into uniform mixtures, a solid core with an entrance surface, an exit surface spaced apart from and substantially parallel to the entrance surface, and a plurality of minute core passageways therebetween for flow of an elastomer-containing hydrocarbon solution from the entrance surface to the exit surface, the passageways have a characteristic dimension of predetermined size to reduce globules of elastomer to small particles distributed evenly in liquid hydrocarbon solution without plugging the passageways. Typically the passageways have a characteristic dimension of predetermined size to reduce globules of elastomer selected from the group consisting of natural rubber, styrene-butadiene rubber, polybutadiene rubber, polyisoprene, a nitrile rubber, and a copolymer of a 1,4-conjugated diene and a vinyl aromatic monomer, to small particles distributed evenly in liquid hydrocarbon solution comprising a vinyl aromatic monomer.

Abstract: The apparatus of this invention includes a container for holding paste ingredients, a mixing and kneading assembly for preparing the food paste within the container, and an extrusion system for pressing the paste into a desired noodle shape. The mixing and kneading assembly comprises a plurality of mixing blades attached to a centrally located cylinder within the container. In a first embodiment, the assembly further includes a scraper blade and a kneading blade. The scraper blade is fixed at a constant distance from the bottom wall of the container such that paste is scraped from to the bottom wall as the scraper blade is spun. In a second embodiment, the assembly further includes a plurality of kneading blades without a scraper blade. In both embodiments, the kneading blades each have a leading and trail edge that remain substantially parallel to the bottom wall of the container.

Abstract: A process for filtering polymer melt which minimizes the generation of dead zones in the filter and provides uniform residence time and accurate temperature control. The process is carried out in an apparatus comprising a plurality of heat exchanger pipes, each enclosing a filter cartridge surrounded by an annular space which terminates at its upper end in a plurality of narrow channels. The molten polymer is charged into the annular space and divided into primary and secondary streams. The primary stream flows through the filter cartridge and the secondary stream, which constitutes 0.03 to 3.0 weight percent of the weight of the combined streams, flows through the narrow channels, whereupon the streams are combined and discharged from the apparatus. The discharge temperature of the polymer is maintained within .+-.1.degree. C. of the charging temperature and the heat exchanger fluid enters the apparatus at a temperature within 1.degree. and 5.degree.C. of the temperature of the melt.

Abstract: An apparatus and method for deagglomerating powder which allows for the powder to be pressed immediately after being deagglomerated. The deagglomerating apparatus is preferably mounted on the powder pressing machine or shares the same housing with the powder pressing machine so that deagglomerated powder may pass from the deagglomerating apparatus into the powder pressing machine.

Abstract: A filter for removing debris from a flow of molten plastic includes a cartridge containing a screen and a holder which seats one face of the cartridge. The flow of molten plastic is directed at an acute angle through the screen producing a filtered plastic flow through a downstream face of the screen and a flow of debris separated from the filter plastic along the upstream screen face. A compartment extends along the upstream screen face and accumulates the separated debris. A passage in the holder communicates with the debris-accumulating compartment and discharges the accumulating debris. A cooling mechanism regulates the rate at which debris is discharged.

Abstract: An apparatus for mechanically separating water from coal includes a vibrating hopper, two contra-rotating cylinders, a solid collector, and a fluid collector. The hopper feeds hydrated coal or coal slurry to wells which are arranged along the surface of a first rotating cylinder. A second rotating cylinder has protrusions on its surface which are precisely placed such that when the first and second cylinders are brought in contact and rotated in contra-rotating directions, each of the wells of the first cylinder and a corresponding protrusion of the second cylinder form mating female and male dies. Coal in the female dies is pressed, and the moisture in the coal is squeezed out. The coal remaining in the dies is then delivered to the solid collector via a pusher. The distance between the cylinders may be varied through adjustable cylinder bearings or pillow blocks. Both the male and female dies may be removed and replaced.

Abstract: An improved pasta maker (20) is provided having an upper mixing chamber (130), lower extrusion chamber (132), and a communicating passageway (157) therebetween. The mixing chamber (130) is an open top vessel, and the extrusion chamber (132) presents an outlet (148) adapted to receive a pasta forming die (188). The pasta maker (20) also includes an apertured slide valve plate (26), a powered, rotatable mixing element (170) within the mixing chamber (130) for mixing of the ingredients therein, and a powered, axially rotatable auger (174) within the extrusion chamber (132) for conveying the ingredients towards and through the die (188).

Abstract: A kitchen appliance for processing food by chopping, mixing, whipping, kneading, pressing, and preparing emulsions from food has a horizontally positioned cylindrical vessel for receiving food. A tool for processing food in the vessel has a diameter that matches the inner diameter of the vessel. A drive motor is connected with a drive shaft to the tool for driving the tool in rotation. An advancing unit is provided for advancing the tool in the axial direction of the vessel over its axial length. The advancing unit has a stationary spindle and a slide connected to the spindle so as to be slidable on the spindle in the axial direction of the vessel, wherein the slide is displaced by an electric motor on the spindle in the axial direction. The drive motor of the tool is connected to the slide to allow for axially advancing the tool within the vessel.

Abstract: A polymer melt filtration apparatus comprising a closed upright cylindrical vessel divided by two horizontal pipe plates into a small lower product distribution chamber with a product inlet at the bottom, a small upper product collecting chamber with a product outlet at the top, and a large middle chamber connected to a heat carrier fluid circuit. A plurality of closely spaced heat exchanger pipes are mounted in the middle chamber between the pipe plates and surrounded by heat carrier fluid, each pipe enclosing a filter cartridge detachably connected at its upper end to said pipe and radially spaced therefrom to form an annular space around each cartridge. A series of narrow channels are provided between the upper end of the annular space and the upper collecting chamber to impede the generation of dead zones inside the annular space and the collecting chamber. The main polymer melt stream flows inside the pipes through the filter cartridges.

Abstract: Disclosed is a filter support for use as part of a screened packing, or filter system, in an extrusion process, wherein the filter support provides a rigid wall in the shape of a dome featuring flow passage holes through the wall such that the longitudinal axis of each hole is perpendicular to a plane tangent to the surface of the dome at the location of the hole.

Abstract: Sealing means for use in the upstream passage of a slide plate screen changer, comprising a ring-shaped seal for contact with the slide plate, a pliable ring and a sleeve. A cavity external to the passage is formed by the seal, the sleeve and a shoulder on the body defining the passage. The pliable ring substantially fills and is confined by the cavity. The sleeve forms an aperture communicating between the passage and the cavity to transmit the pressure in the passage to the pliable ring.

Abstract: A continuous flow polymer filtration apparatus for replacing dirty filters in an extruder includes a reciprocating slide member secured within a slide channel transverse to a bore. The slide channel has a sealing region adjacent to the bore. The slide member houses two filter assemblies for filtering polymer. Each filter assembly comprises at least one filter element which has a width that is less than the width of the sealing region and the distance between the filter assemblies is less than the width of the bore. The slide member is capable of positioning either filter assembly in line with the bore without interrupting the fluid flow of the polymer as well as positioning either filter assembly off-line in order to replace the off-line filter assembly.

Abstract: An apparatus for preparing food paste is provided. The apparatus includes a container for holding paste ingredients, a mixing and kneading assembly for preparing the food paste within the container, and an extrusion system for pressing the paste into a desired noodle shape. The mixing and kneading assembly comprises a plurality of mixing blades attached to a centrally located cylinder within the container. The assembly further includes a kneading blade and scraper blade. The scraper blade is fixed at a constant distance from the bottom wall of the container such that paste is scraped from to the bottom wall as the scraper blade is spun. The kneading blade has leading and trail edges that remain parallel to the bottom wall of the container. The mixing blades and kneading blade are reciprocated in a vertical direction and are biased by a biasing means toward the bottom wall of the container. A drive means rotates a spindle which in turn spins the mixing and kneading assembly.

Abstract: A fiber reinforced inorganic hardened body is manufactured from raw material consisting of a mixture of reinforcing fiber such as bamboo fiber, water-hardening inorganic binder and water by a manufacturing apparatus for stirring and mixing such raw material and forming it into a mat configuration laminated with the thin layers of fine fibers on both the front and rear sides of the thick layer of the normal raw material. The fine fiber material adhered with the water-hardening binder is partially separated from the main raw material at both the material supply side and material discharge side of a set of pin-type rolls. The portion of the fine fiber separated from the main raw material is first supplied to the upstream side of the forming conveyor to form a first layer of fine fiber.

Abstract: An extruder device having improved flow distribution, reduced shear and reduced surface area on which material can accumulate, including a breaker plate having a plurality of symmetrically arranged tapered holes provided therein. The holes are disposed on a series of V-shaped concentric centering grooves the diameters of which progressively increase, albeit by diminishing increments, over the adjacent inner circles. Each of the holes disposed on a particular centering groove is of equal diameter; however, the diameters of the holes become progressively smaller as the diameters of the centering grooves on which they are disposed increase. The holes nearest the center of the plate have the largest diameters, while those nearest the periphery of the plate have the smallest diameters.

Abstract: An apparatus for coating the outer surface of an elongated body (10), such as a rod or tube, with a layer of concrete (30) includes a frame structure (21). Pipe or tube sections (10) may be supplied to a tilting device (27) in a horizontal position on a carriage (12) and tilted to a vertical position within the tower-like frame structure (21). The apparatus comprises means (24, 27) for retaining the elongated body (10) in the upright position within the frame structure and an annular mould (26) for surrounding the upright elongated body so as to define an annular space between the elongated body and the annular mould, and concrete may be fed to the annular mould space by feeding means (28, 29). The mould may include an upper funnel-like part, which is rotatable about the axis of the annular mould relative to the remaining part of the mould so as to distribute the concrete mixture peripherally in the annular mould space.

Abstract: Filtration process and filters for use with materials such as, but not limited to, melts, utilizing a band of filter medium sealed in the filter rollers to seal the material from the outside. In one embodiment, the seal rollers reduce to a minimum the leakage of melt to the outside and make it possible to advance the filter medium through the filter continuously. In various embodiments, the filter medium can be advanced either by the takeup spool or by driving the seal rollers and the rate of movement of the filter medium through the filter can be controlled to maintain a constant pressure drop across the filter. Two component wear-resistant seals are also provided. Maintaining constant conditions through continuous advancement of the filter medium during filtration yields higher product quality and dimensional stability.

Abstract: Cleaning of vacuum presses is facilitated by providing a vacuum press housing that is composed of pivotable housing elements which are in turn pivotally attached to the press frame. The horizontally hinged cylinder halves that serve as housing elements of the preliminary press are connected by way of a flange connection to a sieve plate holder which is likewise arranged on a U-shaped support of the press frame so that it is pivotally movable horizontally. Arranged displaceably at the other end of the press is a joint washer with radial and lateral sealing means. The vacuum chamber which can be raised and lowered vertically and which can be pivoted horizontally is releasably connected to the joint washer by snap closure means. Pivotal movement of the vacuum chamber is ensured by a hinge connection to the U-shaped support. The vacuum chamber is placed upon the filler opening of the lower press, and is secured by means of snap closure means.

Abstract: A compact and precision extrusion system for extruding strips of rubber compounds with profiles of accurate dimensions. Strips of rubber compound are uniformly heated and mixed in an extruder and then passed through a low pressure drop strainer to remove foreign matter. The strained compound then is fed directly into a gear pump which delivers precise volumes of the rubber compound immediately into the spread chamber of an extrusion head after which it passes through a die to form a precise strip of the rubber compound. The strainer and extrusion head are movably mounted with respect to the gear pump for axial separation from the gear pump for easy removal of the rubber compound from the various components of the system to facilitate compound changes. A control system regulates the speed of the extruder to provide a near constant pressure at the entrance port of the gear pump to precisely regulate the rate of extrusion of the compound from the extrusion head.

Abstract: Pultruded profiles are manufactured as a die station which is fed with resin via a pump. The core of the profile is formed by granular material fed to station from a hopper through the interior of a hollow duct which is essentially vertically disposed, above the station, so that the granular material is moved under the influence of gravity. The exterior surface of duct is profiled and the skin-forming materials for the profile are guided by the profiled surface to the die station. The skin forming materials are runs of cloth. The pultruded profile may be tubular or hollow so that it has both an external surface and an internal surface in which case the internal surface incorporates a further resin bonded cloth fed to the interior of the die station over the external surface of a mandrel.

Abstract: A synthetic-resin article is molded by plastifying a virgin granulate into a fluent stream and plastifying a recycle granulate into another fluent stream. The recycle stream is then filtered while still plastified to removing particulate impurities from it. Then the filtered recycle stream while still plastified is combined with the virgin stream to form a combined stream and the combined stream is fed into a mold. The stream is mechanically filtered.

Abstract: Extrusion apparatus and a method of extruding in which an extrusion screw terminates close to a breaker plate so that an annular passage surrounding the screw extends to the breaker plate. The breaker plate has flow apertures arranged around an edge region of the plate for direct communication with the annular passage. The flow passage arrangement decreases in cross-sectional area in a downstream direction whereby plastics materials do not become static in certain regions. Plastics degradation, particularly for PVC, is therefore avoided.

Abstract: A process and apparatus for injection molding of plastic material incorporate a perforated member for melt filtering and/or melt mixing during metering of plasticized material. The perforated member may be of a disk form mounted to a screw plunger provided within a machine body with the perforations arranged around the screw plunger. Impurities accumulated at the perforated member may be purged by rotating the screw plunger from a nozzle connected to the machine body via an annular recess formed at an inner surface of the machine body or directly from the machine body per se via a radial hole formed therein, when the screw plunger is in a predetermined position preferably in the most forward position, where the recess or the hole is located in the vicinity of the perforated member.

Abstract: A gear pump for pumping viscous material has a housing with an inlet and an outlet and a gear chamber between the inlet and the outlet. A pair of intermeshing gear wheels which are rotatably supported by bearings in the gear chamber of the housing have end faces in rotative contact with abutting faces of the housing. Spiral grooves in end faces of the gear wheels have a direction to move radially outwardly any material entering between end faces of the gear wheels and abutting faces of the housing to prevent such material from reaching the bearings. An integral drive shaft of one of the gears has a helical groove for preventing material from reaching bearings of the drive shaft. The driven gear has a central circular recess in which a bearing stud projects with bearing needles between the stud and the recess in the gear.

Abstract: An extruder head made up of several segments including a first section made up of at least two plates bolted together. At least one plate is hingeably mounted to another plate in the first section to provide access to an extrudate passage defined by the plates. Downstream of the first section is a pair of mating blocks bolted to the first section further defining the extrudate passage. Inserts of hardened steel are provided and held by the plates and blocks forming the extruder head and the inserts define parts of the extrudate passage. A cooling liquid chamber is provided in at least one insert to cool the wall forming the passage. Although the passage is continuously restricted in the downstream direction, to increase the pressure of the elastomeric melt, intermittent portions of a slightly greater cross-sectional area are provided to allow expansion and thus intermittent lower pressure of the melt as it passes through the passage.

Abstract: A sheet-like molding made of a liquid-crystalline polymer which can be processed in the liquid-crystalline melt is described. It contains less than 1 .times.10.sup.-1, preferably less than 2 .times.10.sup.-2, flow irregularities per cm.sup.3.

Abstract: The present invention feeds a plurality of different molten resin jet streams into a T die adapted to produce film members such as plastic films. A plurality of molten jet streams extruded from a plurality of extruders, respectively, are fed from their predetermined directions into one resin feed passage in communication with the T die and combined or united without causing the mixture with each other. The relative positional relationship between the intersurfaces between the adjacent molten resin jet streams defined when the molten resin jet streams are combined or united on the one hand and an elongated discharge port of the T die can be adjusted so that the relative positional relationship between a plurality of extruders and the T die can be freely changed.

Abstract: Method and apparatus for applying a layer of insulation around an electrical cable core in which the contaminant size is not greater than about 200 microns. Unplasticized insulation material, such as polyethylene, is supplied to an extruder which forces the material through a filter which prevents the passage of contaminants having a size greater than about 200 microns and in which there is a pressure drop. The filtered material is delivered to a pump which increases the pressure thereon and forces it through a static mixer at the output of which the filtered material is delivered to the cross-head of extrusion apparatus which applies the filtered material to the cable core as it is advanced longitudinally. If the insulating material is to be cross-linked by a cross-linking agent, the agent is injected into the filtered material between the pump and the mixer.

Abstract: The self-cleaning filter particularly for high-viscosity pasty fluids has a fixed body having a substantially cylindrical elongated chamber in which a filtration drum is supported and defines a central region, at one end of which there is an inlet for the fluid to be filtered, and an outer annular region, at the other end of which there is a duct for the removal of the filtered fluid; a shaft is axially supported and rotationally actuated in the chamber and has a helical crest the profile whereof is suitable for grazing the inner surface of the drum to remove therefrom the impurities which are present and is suitable for pushing the fluid toward an impurity discharge duct arranged at the other end of the chamber, the constant cleaning of the drum being suitable for keeping constant the pressure drop on the filter.

Abstract: A filter changing apparatus for use with an extruder for plasticized synthetic plastic material has a housing with one or more bores for reciprocable cylindrical carriers of tubular filters. Each carrier is movable between at least one first position in which a stream of plastic material can flow from an inlet of the housing, axially into one end of the filter, radially outwardly from the filter and into an outlet of the housing, and at least one second position in which the carrier seals the inlet from the outlet or permits expulsion of contaminants and plastic material from the filter in a direction toward the inlet or into a second outlet of the housing.

Abstract: Novel method and apparatus is disclosed for forming an integral skin on an extruded honeycomb structure, wherein the skin material is collected in a peripheral area of a die body, is passed through an adjustable flow control gap, and then through a predetermined gap thickness of a skin forming slot so as to then knit with the honeycomb structure extruded by the die prior to being extruded from the die. A plurality of flow control plates having different internal peripheral diameters are provided so as to provide different flow control gaps, as desired. In addition, a plurality of shims having different thicknesses are provided so as to position the mask a given distance away from the die, and thereby control the skin thickness gap. The die may be formed by merely relieving a peripheral portion of a typically automotive catalytic converter extrusion die and providing a trim ring about the relieved portion so as to inhibit the flow of batch material from partially open feed holes.

Abstract: A method and an apparatus for extruding a ceramic batch supplied from a vacuum auger machine into a formed body by a plunger molding machine, wherein the temperature distribution of the ceramic batch at the outlet portion is measured and is controlled so as to supply the ceramic batch having substantially a uniform temperature to the plunger molding machine from the vacuum auger machine.

Abstract: Apparatus is disclosed for filtering melted plastic used in an injection molding system. The apparatus consists of a housing having an inlet and outlet with a cylindrical inner chamber disposed in alignment therebetween, and a tubular filter element threadably mounted in the internal housing. To avoid loosening of the filter element, a plurality of spiral surfaces are formed in the filter element that are exposed to the pressurized flow of melted plastic, generating a resultant force that tends to screw the filter element tighter onto its threaded mount. The threaded mount is at the inlet end of the tubular element, causing it to extend in cantilever fashion axially into the internal chamber and toward the outlet. This creates an annular discharge passage around the filter element that is unobstructed, permitting the filtered plastic to converge smoothly into the outlet.

Abstract: A polymer metl delivery system includes a preheated hopper, a high clearance auger, a gear pump, and provisions for delivering heat to the polymer. The resin is melted and fed to the auger and pumped to the gear pump and further pump to an extrusion die. Heat is added to the polymers from the hopper and throughout its course to the outlet connection for the extrusion die. The preheated in the hopper includes heat conductive fins. The system is particularly suited for use in combination with a meltblowing die.