Abstract: The invention provides a process and device for the spinning of polyamides including transporting vapor through at least one round spinning nozzle casing (5) using an exhaust device (14, 15) that is positioned under at least one round spinning nozzle plate (10).In this process, the vapor is injected tangentially into the upper portion of the applicable spinning nozzle casing (5) and is conducted downward through at least one helical groove (7), which is arranged along the exterior of the applicable spinning nozzle unit (6). The vapor at the lower end of the spinning nozzle unit (6) is conducted against a circular, horizontally positioned groove (8), where it undergoes a change in the direction of flow toward the spinning nozzle plate (10).

Abstract: A multi-component fiberizing disk for fiberizing a molten fiberizable material in a rotary fiberization process includes: an annular sidewall having fiberizing holes therein through which a molten fiberizable material passes to fiberize the molten fiberizable material; an upper annular flange; and a base having an annular outer peripheral edge. The annular sidewall, the upper annular flange and the base are made from at least two separate components and, preferably, from three separate components. The separate components are secured to together as the fiberizing disk by fasteners, such as bolt and nut fasteners, that permits the separate components of the fiberizing disk to be disassembled after service. The different components can be made of different metal alloys and a distribution manifold can be incorporated into the fiberizing disk for distributing the molten fiberizable material(s) within the fiberizing disk and to make bi-component fibers.

Abstract: Core filaments for the formation of a fleece are formed in a spinneret assembly which has a wide slit extrusion die provided with two outlet slits for different thermoplastic synthetic resins. Below the die, a distribution plate has two sets of feed bores which deliver synthetic resin from the two sets of bores to a core-forming plate directly beneath the distribution plate and a spinneret plate below the core-forming plate whose spinneret bores are aligned with core-forming bores in the core-forming plate.

Abstract: This invention relates to an arrangement for sealing a closed chamber in which equipment is to be replaced and especially to a chamber in which equipment is to be replaced while the chamber is to be maintained closed. The arrangement includes a channel filled with a fluid, such as water, and a skirt arranged to extend into the fluid to form the seal. As the skirt extends down into the liquid, a portal space is formed at the opening in the chamber and the opening preferably includes a gate for closing the chamber from the portal space and the outside.

Abstract: A melt spinning apparatus for extruding and spinning thermoplastic filaments as part of the fabrication of a multi-filament yarn. The apparatus includes a plurality of spinning units arranged in a row in a gas tight heated container, and each spinning unit comprises upper and lower coaxial pipes which are interconnected by means of a common supporting plate. The melt metering pump and the spinneret assembly are mounted within the pipes. A method of fabricating the apparatus is also disclosed.

Abstract: A meltblowing method and apparatus for dispensing an adhesive through a plurality of first orifices of a die assembly fabricated from a plurality of laminated members to form a plurality of adhesive flows at a first velocity, and dispensing air through a plurality of second orifices in the die assembly to form a plurality of air flows at a second velocity. The plurality of first and second orifices arranged in an alternating series so that each of the plurality of first orifices is flanked on substantially opposing sides by one of the plurality of second orifices, wherein the plurality of first and second orifices are oriented to direct non-convergently the plurality of adhesive flows and the plurality of air flows.

Abstract: A parallel plate nozzle for extruding visco-elastic fluidic materials, useable in the manufacture of non-woven materials, and method therefor dispenses a plurality of first and second fluids from a corresponding plurality of first and second orifices to form first and second adjacent fluid flows. The first fluid flows are drawn and attenuated by not more than one corresponding second fluid flow at a second velocity greater than a first velocity of the first fluid flow to form corresponding first fluid filaments, which are preferably relatively continuous and vacillated chaotically. The first and corresponding second fluid flows are spaced as closely as possible to maximize filament drawing efficiency, and adjacent first fluid orifices are spaced sufficiently apart to prevent merging of the first fluid flows prior filament formation.

Abstract: There is provided in accordance with the present invention a spin pack for filaments that contains one or more electroformed plates. The invention additionally provides a process for producing a plate for a spin pack, which process has the step of electroforming the plate.

Abstract: The present invention relates to a novel arrangement for attaching, by screw threads, one device to another wherein the one device has a greater thermal rate of expansion than the other and the devices are assembled at a temperature which is lower than that at which the two devices are regularly subjected. In particular, the novel arrangement maintains the security of the attachment where the differing thermal rates of expansion would normally cause the screw thread attachment to become loose.

Abstract: A spinning noxxle apparatus for the production of elastane filaments from spinning solutions by the wet spinning method comprising a feed line (7) for the spinning solution, a filter unit (1) having a mixer element (2) and a filter element element (3), a spinning nozzle (5) for immersion in a precipation bath (11), and a connection piece (8) for the direct connection of the filter unit (1) and spinning nozzle (5), wherein the spinning nozzle (5) is joined to the connection piece (8) by a quick-release coupling connection (4), particularly a bayonet coupling (4).

Abstract: A meltblowing method and apparatus for dispensing an adhesive through a plurality of first orifices of a die assembly fabricated from a plurality of laminated members to form a plurality of adhesive flows at a first velocity, and dispensing air through a plurality of second orifices in the die assembly to form a plurality of air flows at a second velocity. The plurality of first and second orifices arranged in an alternating series so that each of the plurality of first orifices is flanked on substantially opposing sides by one of the plurality of second orifices, wherein the plurality of first and second orifices are oriented to direct non-convergently the plurality of adhesive flows and the plurality of air flows.

Abstract: A system and method for applying fluids, including fiberized hot melt adhesive, onto a substrate from one or more meltblowing die assemblies mounted on a manifold that supplies fluid thereto. At least one of the die assemblies is selected from a group of die assemblies having different configurations of fluid dispensing orifices, wherein various combinations of the different die assembly configurations are mountable onto the manifold to provide a wide range of partial fluid dispensing patterns onto the substrate. Each of the plurality of fluid dispensing orifices are flanked by an air dispensing orifice disposed on opposing sides thereof, wherein air dispensing orifices may extend across a portion of the remaining portion of the meltblowing die assembly void of fluid dispensing orifices.

Abstract: A multiplate spin pack receives metered molten polymer and metered amounts of additive components selectively proportioned to produce desired characteristics in extruded fiber. The additive components are mixed together and blended with the polymer by passage through a pattern of mixer channels formed in opposed faces of spin pack mix plates immediately upstream of the spinning orifices of a spinneret. Mixing is produced by splitting the fluids into multiple paths and repeatedly converging the paths into boundary layer contact. Short flow paths of mixed polymer minimizes time and waste in change over procedures.

Abstract: The invention relates to a spin beam for spinning a plurality of synthetic filament yarns, and which has the shape of an elongate, hollow parallelepiped block formed by two side walls, a lower wall, an upper wall and end walls. The spin beam includes a number of pressure-tight spin heads with downwardly extending spinnerets arranged in at least one row on a lower support. An upper support mounts at least one multiple pump which is connected, via distribution lines, to the spin heads. A pump connection plate is joined to the upper support for each multiple pump. Each of the distribution lines is connected on the one head to the pump connection plate and on the other hand to one of the spin heads, the distributing lines forming together with the pump connection plate, the spin heads, and the lower support, form a self-supporting distributor unit. The lower support forms a portion of the lower wall of the spin beam, and the side walls are mounted on the lower support of the self-supporting unit.

Abstract: The apparatus is provided to make a melt blown fibrous medium and includes first and second melt blowing dies for respectively issuing first and second streams of melt blown fibers along first and second melt blown paths. The first and second streams are issued on a forming surface where the streams are collected to form a melt blown fibrous medium. A movable transfer surface is interposed between the first die and the forming surface in the first path so that the first stream of melt blown fibers impinges on the transfer surface in advance of the forming surface such that the first stream is transferred to and brought into contact with the second stream of melt blown fibers on the forming surface.

Abstract: Apparatus for drawing filament bundles present in the form of a curtain comprises an injector which is rectangular in horizontal section and which is adjoined by a drawing shaft in the form of two parallel plates. At least one of the plates comprises a plurality of pressure measuring elements arranged in the form of a grid whereby the velocity distribution of the drawing gas in the drawing shaft can be adjusted through local variation of the geometry or the amount of drawing gas in the drawing shaft.

Abstract: The present invention relates to a die body consisting of a multiplicity of modular die plates, which are easily and rapidly interchangeable. The modular die plates can be configured to extrude different shapes and types of fibers. The apparatus may also be configured to extrude multiple types of materials each from a plurality of separate ports or from a plurality of common ports. The apparatus may also be designed to include single or multiple ports to direct air or other fluids to draw or attenuate the extrudate into fibers of a desired diameter. The extrudate may be treated with the air or various other gases or fluids within the die or exterior to the die tips.

Abstract: A strand caster, in particular for plastic strand casting systems, is provided, which in a known fashion consists of a nozzle plate and a caster. The nozzle plate and the caster include abutment surfaces facing each other, and the nozzle plate is mountable to the caster by corresponding mounting elements. The surface structure of at least one abutment surface of the nozzle plate or respectively the caster is adapted such that, due to the fastened state caused during operation, the one abutment surface accommodates to the opposing other abutment surface under tension so that an uniform surface pressing between the nozzle plate and the caster is achievable.

Abstract: A meltblowing die for producing nonwoven polymer webs includes an inner tube having a plurality of orifices arranged in a row thereon, and an outer tube encasing the inner tube and having a slot formed therein in registry with the row orifices. The inner tube and outer tubes are constructed to define converging air passages on either side of the row of orifices, whereby hot air delivered to the outer tube converges on polymer fibers extruded through the orifices and imparts drag forces thereon to attenuate and draw down the fibers to microsize.

Abstract: A meltblowing die assembly featuring a preassembled die tip assembly permitting the rapid exchange thereof. The preassembled die tip assembly includes a die tip having a triangular nosepiece, a member mounted on the die tip assembly for conforming the die tip to the die body, and a pair of air plates mounted on the die tip and in combination with the nosepiece define converging air slots.

Abstract: The heat transmission from the heating box of a spinning beam to the nozzle package carried therein in a nozzle throat is improved in such a way that the fixing device for the package is provided with heat receiving elements. These elements are subjected to saturated vapor in operation and are provided with condensation surfaces so as to receive heat from the saturated vapor. The heat received is transmitted to the package via at least one heat bridge.

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 combined filament type, melt-blow spinneret device can correspond to various kinds of microfine, combined filaments, and includes a spinning-resin-feeding plate 2 having respective resin-introducing grooves 7a, 7b for introducing two kinds of spinning resins A and B; a distributing plate 3 having distributing grooves 9a, 9b for respectively distributing the spinning resins A, B fed from the resin-introducing grooves of the resin-feeding plate 2; a nozzle plate 5 having a cavity 22 for receiving a separating plate 4 therein and a plurality of holes formed in a bottom interior surface of a downwardly-extending portion of the nozzle plate 5; a separating plate 4 received in the cavity 22 and attached to the second major surface of the distributing plate 3, the separating plate 4 including separation grooves 17a, 17b engraved from a side portion to a bottom portion thereof facing a plurality of holes 14 of the nozzle plate 5, for introducing the different spinning resins into the plurality of holes; and a clear

Abstract: Apparatus is provided for extending the life of spinners by means of reinforcement which includes a plurality of arms secured to the bottom wall of a spinner either individually or via an annular plate from which the arms extend. The reinforcement applies a radially inward force on a flange extending from the top or center of an outer sidewall of the spinner. The arms exert the radial force as the result of offset cams, due to a prestressed condition which is released after the reinforcement is installed in a spinner or otherwise. If the spinner includes both a center flange and an upper flange, the reinforcement may be installed to engage the center flange with gussets interconnecting the center flange and the upper flange at least at locations corresponding to the reinforcement to thereby provide reinforcement for both flanges.

Abstract: A meltblowing die designed to efficiently receive a preassembled die tip assembly is described. The die assembly includes a die body mounted on a meltblowing machine and a replaceable die tip assembly. The die tip assembly includes a mounting block, to which are mounted a die tip and air knives on opposite sides of the die tip. The positions of the air knives are adjustable to set air gap and set back parameters important in proper operation. The die tip assembly is moved into and out of the die body after air knife adjustment, permitting the adjustment to be made with the die tip assembly off the machine, and allowing rapid replacement. The replacement die tip assembly is preheated, permitting replacement while the die body is still hot.

Abstract: A jet assembly for spinning cellulose fibres from a solution of cellulose in an amine oxide solvent in which the jet assembly includes a generally top-hat shaped spinnerette having a series of downwardly directed holes through the base of the spinnerette and an outwardly directed flange around the periphery of the vertical walls of the spinnerette, the jet assembly including a heated housing engaging with the flange and being bolted to the flange, insulation being provided on the underside of the jet assembly over the outer periphery, the combination of heating and insulation regulating the temperature of the jet assembly for optimum spinning of an amine oxide cellulose solution.

Abstract: Disclosed is a cam pump with two sets of driving and driven pump cams, which receive polymer melt from an extruder and exit the polymer melt through two exit channels in a sequence of 1/2 volume unit, followed by a 0 volume unit, followed by 1 volume unit for one exit channel and simultaneously in a sequence of 1/2 volume unit followed by a 1 volume unit, followed by 0 volume unit for the second exit channel. The cam pump is used in a apparatus for melt mixing and spinning synthetic polymers for the manufacture of yarns with a multiplicity of bundles of filaments, whereby the properties of all filaments in all bundles alternate along their length and the properties of the filaments of each bundle of adjacent bundles alternate between the adjacent bundles.

Abstract: A nozzle assembly for forming hollow fibers, particularly a "Z-fiber" having longitudinally oriented trabeculae with the fiber wall, is provided. The nozzle assembly contains a replaceable nozzle cap, a replaceable seal-guide, and a retractable central bore used to supply core material for the hollow fibers. The Z-fibers are particularly useful in enabling cells, solutes, or the like, to enter the fiber wall and move longitudinally into the center of the fiber wall.

Abstract: An apparatus for spinning materials, such as thermo-flow materials, is disclosed. The apparatus includes a spinner head which is rotatable about an axis. The spinner head includes a heater assembly having an annular heater element, a removable controlled orifice band having a plurality of openings through its thickness and positioned around and in close proximity to the heater element and an annular support ring positioned around the controlled orifice band for holding the heater element and band within the spinner head.

Abstract: To simplify the cleaning and maintenance of a meltblowing head, the lips defining with the spinneret the flowing slits adjusting the row of orifices can be swung away from the spinneret on respective lip guides pivotally connected to respective setback bars. The setback bars can be adjusted and locked in place with respect to the blowing housing and the lips can be adjusted and locked in place relative to the lip guides independently of the swinging action.

Abstract: A sealing plate upstream of a spinneret has cylindrical flow channels, at least some of which have a first diameter. Each of the flow channels corresponds in position to a bore in the spinneret plate. The number and denier of extruded filaments can be altered by simply changing the plate. The plate provides a seal by deflecting under the extrusion pressure.

Abstract: A spinning nozzle tip structure arranged such that a nozzle piece made of any one of ceramics, cermets or cemented carbides and having a spinning nozzle is fitted into an accommodating hole formed in a nozzle body made of a metal such as stainless steel, said spinning nozzle tip structure being characterized in that a metal ring is interposed between the nozzle piece and the nozzle body so as to effect liquid-hermetic sealing therebetween.

Abstract: A melt spinning apparatus adapted for spinning a plurality of preferably monofilaments each having a denier which is maintained within close tolerances. The apparatus comprises a nozzle head having a plurality of vertical bores which are annularly arranged about a central axis and a nozzle assembly in each of the bores. A separate melt delivery system delivers pressurized melt to each nozzle assembly, and in a preferred embodiment, each separate melt delivery system comprises one of the discharge outlets of a planetary gear pump.

Abstract: A spinning apparatus for melt spinning thermoplastic multicomponent yarn is disclosed, in which a nozzle pack (22) is joined by bolts with a filter cup (13), with the entire unit being mounted by a thread (21) on a connecting plug (20) of the pump or distributor block (10). The nozzle pack (22) is adapted to produce bicomponent yarns, and the exchange of a single blending plate (37) allows the apparatus to produce different structures of bicomponent filaments. Such spinning apparatus enhance the flexibility of the synthetic fiber producer and reduce the cost for spare parts, since it is necessary to keep available only additional blending plates (37), but not entire nozzle packs (22).

Abstract: An apparatus for extruding a wide variety of plural-component and mixed monocomponent fiber configurations in a spin pack utilizes one or more disposable distributor plates in which distribution flow paths are formed on one or both sides to distribute the polymer components to appropriate spinneret inlet hole locations. The distributor plates are inexpensive compared to drilled, milled, reamed, etc., plates and may be very thin, rendering the fabrication expense for the plates small, relative to the remainder of the spin pack, as to justify discarding or disposing of the plates rather than periodically cleaning them. The distribution paths may be small and densely packed, whereby the spinneret orifices can be more densely packed in the spinneret and staggered as between rows and columns so as to increase the fiber yield per given spinneret surface area.

Abstract: The invention provides a spinnerette assembly for multicomponent hollow fibers of the sheath/core type in which the channel for supplying the sheath material is located at a distance from the extrusion orifice of the spinnerette of no more than one-half of the width of the extrusion orifice. The spinnerette ensures uniform supply of the sheath material to the hollow fiber.

Abstract: A spinning block for the melt spinning of polymers, consisting of a melt channel, a coupling which is attached to the spinning bar and a nozzle block casing with a filter element and a spinning nozzle plate. A connector for detachably securing said nozzle block casing to the coupling consists of at least two bolts which are positioned symmetrically and perpendicularly to the axis of spinning, which bolts engage cooperating grooves, of a particular configuration, also positioned symmetrically and concentrically to the spinning axis. The bolts can be fixed to the casing or to the coupling. The grooves are provided in the coupling or the casing to complement the location of the bolts. By rotation of the nozzle block casing with respect to the coupling around the spinning axis, the parts are locked together.

Abstract: Process and device for drawing off and blocking off a melt, especially of plastic material, with a heatable melter (1) fitted with a blocking valve (3) acting as a melt distributor from which the melt flows into a nozzle plate (10) which divides the melt by means of nozzles (14) into a plurality of threads, whereby the temperature of the melter and nozzle plate is regulated separately and the blocking valve is closed to block the melt off and the nozzle plate is tightly closed off by a cover (18). To draw off the melt with the blocking valve open, the temperature of the melter and the nozzle plate is kept substantially at the same level and to block off the melt with the blocking valve closed the nozzle plate is taken to a temperature just above the solidification temperature of the melt material.

Abstract: A spinneret made from a hardened metal plate having one or more slot shaped capillaries exiting the face of the spinneret. The walls of the capillaries taper toward the face of the spinneret, and each capillary has a length to width ratio of greater than about 2.

Abstract: The fish food is in the form of a dense filament having a diameter of less than about 0.05 inch. The filament is produced by extruding a wad of viscous meal in an extrusion chamber and associated die. The preferred extrusion tool has a tubular member with an end piece containing a small aperture. The tool is held in one hand by a stationary handle, while the other hand advances a plunger through the tubular member, thereby extruding the filaments.

Abstract: High twist fibers are produced in a spin/quench/twist process directly from a modified spinneret. The spinneret consists of capillaries that are installed in highly elongated inserts which are surrounded by heat deflecting shields surrounded by an annular concentric orifice supplied with a fluid (air or steam preferred) that simultaneously quenches and twists the emerging filaments as they exit the capillary quench/torque jet.

Abstract: A device for changing the filament count from a spinnerette assembly includes a sealing plate positioned upstream from the spinnerette assembly to prevent the passage of the material being spun into one or more particular spinnerette bores.

Abstract: A spinneret device for conjugate fibers of eccentric sheath-and-core type, capable of universally corresponding to various polymer-spinning conditions; affording a uniform eccentric extent of the core component; reducing the quality variation of single fibers and also that of fibers with lapse of time; being manufactured by easy works and economically are provided, which device includes cap 1; inlets of stocks 2, 2A; reservoirs 3, 3A; partitioner 4 separating 3 and 3A; filter 6; first distributing plate 7 provided with introducing holoes 8A, 8 for alternately distributing the stocks into front and rear distributing grooves 10A, 10; second distributing plate 9 on the back surface of which the grooves 10A, 10 being parallel, equally spaced and linear are engraved and on the ventral surface of which pressure-controlling holes 11A, 11 are bored; eccentricity-controlling plate 14 on the back surface of which grooves for eccentricity, 15 are engraved and the ventral surface (flat) of which introducing holes 16 for

Abstract: A die tip of a meltblowing die is mounted on the die body to provide a residual compressive force in the die tip nosepiece thereby resisting internal extrusion pressures.

Abstract: A sheath-core type composite spinneret assembly includes in combination:(1) an annular array of multiple spinning holes provided in at least one row,(2) a spinning-stock-solutions-combining-passage being in the form of an endless annulus per the annular array of one row of the spinning holes and on which inlets of the spinning holes are open,(3) a single core-component-stock-solution-distributing-passage in the annular form; core-component-stock-solution-outlet-passages provided from the core-distributing-passage to the solutions-combining-passage; two sheath-component-stock-solution-distributing-passages, both in the annular form, sandwiching the core-distributing-passage; and sheath-component-stock-solution-outlet-passages provided from the shealth-distributing-passages to the solutions-combining-passage and open on both side edges of the solutions-combining-passage at positions located substantially in the middle of the adjacent inlets of the holes, and(4) a core- and sheath-component-stock-solution-feedin

Abstract: Spinning apparatus for the production of monofilament yarn includes a spinning tool having a flow channel in the form of a flattened U for providing polymer melt to a group of nozzles, the flow channel having a cross-sectional area which becomes larger, at least in an upper part thereof, in a direction of polymer melt flow therethrough.

Abstract: A melt spinning apparatus is disclosed wherein the spinning head is inserted in an upward manner from beneath into the lower end of a vertically extending opening in a heater box. Upwardly directed air currents are avoided in the vertically extending opening by providing a metallic contact, in the form of supporting and locking strips, between the heating box and the spinning head. The supporting and locking strips provide for the easy removal and insertion of the spinning head into and out of the heating box from beneath. The upper end of the spinning head is closed, and the internal walls of the vertically extending opening in the heater box and the external walls of adjacent spinning head are provided with internal contact surfaces which collectively define horizontal channels.

Abstract: An apparatus wherein there is provided a source of fiber forming material, with said fiber forming material being pumped into a die having a plurality of spinnerets about its periphery. The die is rotated at a predetermined adjustable speed, whereby the liquid is expelled from the die so as to form fibers. It is preferred that the fiber forming material be cooled as it is leaving the holes in the spinnerets during drawdown. The fibers may be used to produce fabrics, fibrous tow and yarn through appropriate take-up systems. The pumping system provides a pumping action whereby a volumetric quantity of liquid is forced into the rotational system independent of viscosity or the back pressure generated by the spinnerets and the manifold system of the spinning head, thus creating positive displacement feeding. Positive displacement feeding may be accomplished by the extruder alone or with an additional pump of the type generally employed for this purpose.

Abstract: A nozzle plate having a plurality of passages is adapted to permit a melt to flow therethrough to form a stream of filaments. A dispersing head is located downstream of the plate and in the filament stream. The head is substantially in the form of a cylinder with its axis substantially parallel to the stream. An inlet for coolant (preferably air) connects a source thereof with the head. The wall of the head is porous, thereby permitting the coolant to pass through the wall and impinge on the filaments.

Abstract: A spinneret assembly for conjugate spinning includes (1) a spinneret plate provided with a number of spinning holes and (2) a distribution plate superposed closely upon the upper face of the spinneret plate onto which two kinds of spinning liquids are to be fed. The distribution plate is arranged in such a manner that, of separate spinning liquid paths for the two kinds of spinning liquid comprising a number of separate and parallel inlet grooves for receiving individually and alternately the two kinds of spinning liquids fed from above and guide paths for guiding individually the two kinds of spinning liquids fed out of the inlet grooves onto upper openings of the spinning holes in the spinneret plate, a part or whole of each guide path forms a pressure-adjusting means. Liquid storing chambers are provided on the lower face of the distribution plate at positions corresponding to the spinning holes.