Upstream Of Multi-orifice Shaping Die Patents (Class 425/198)
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Patent number: 6241503Abstract: A composite yarn formed of at least two different individual polymeric fibers may be spun by directing at least two streams of different polymer melts (e.g., polymer melts of different colors and/or characteristics) to a spin pack such that one of the streams has a greater volumetric throughput as compared to the volumetric throughput of the other stream. The polymer streams are each distributed within the spin pack among individual filtration chambers so that the filtration chambers receive substantially the same volumetric throughput allotment of the polymer melt streams. In such a manner, the polymer melt streams are distributed among the filtration chambers in substantially equal throughput allotments even though the total throughput of the melt streams of each of the different polymers may be unequal. The filtered polymer melt streams may then be directed through fiber-forming orifices of a spinneret plate to form the composite yarn.Type: GrantFiled: May 20, 1996Date of Patent: June 5, 2001Assignee: BASF CorporationInventors: Donald E. Wright, William C. Flynn, III
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Patent number: 6171536Abstract: A method and apparatus for melt spinning molten polymeric material into filaments, preferably embodied in the form of a spin pack assembly, utilizes an annular polymer filter formed of a screen mesh material to have a U-shaped axial cross-section defining an open end oriented to face upwardly for receiving polymer within the annular interior of the screen to flow outwardly therefrom to a downstream spinneret for extrusion. The filter eliminates any need to utilize sand or other filter material contained by the screen as a primary or auxiliary filtration medium and enables effective polymer flow substantially through the entire surface area of the screen without stagnation of material flow.Type: GrantFiled: April 10, 1998Date of Patent: January 9, 2001Assignee: Arteva North America S.A.R.L.Inventors: William O. Novak, J. Richard Goodall
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Patent number: 6168411Abstract: The present invention includes a filtration apparatus for an injection molding machine where the injection molding machine includes a screw housed within a bore for generating molten polymer. A tip member extends axially from the screw. The tip member has radially extending upstream and downstream flanges positioned axially apart from each other. A filter encircles the tip member and is capable of filtering the molten polymer. An annular ring member encircles the tip member and is slidably positioned within the bore between the upstream and downstream flanges. The ring member is capable of sliding between the flanges for directing the molten polymer through the filter or preventing back flow of the molten polymer past the upstream flange.Type: GrantFiled: March 18, 1999Date of Patent: January 2, 2001Assignee: Dynisco Extrusion, Inc.Inventor: Paul D. Wildman
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Patent number: 6165399Abstract: A process for preparing thermoplastics or polymer blends comprising (A) from 5 to 95% of a water-moist elastomer component containing up to 60% of residual water, (B) from 5 to 95% of a thermoplastic polymer, (C) from 0 to 95% of a further polymer, and (D) from 0 to 70% of additives, said process comprising mixing the components A to D in an extruder with mechanical dewatering of component A, wherein the extruder has at least two rotating screws and, in the conveying direction, is essentially composed of a metering section into which component A is fed, a squeeze section which serves for dewatering component A and contains a retarding element and an associated dewatering orifice which is present upstream of the retarding element by a distance corresponding to at least one screw diameter, a feed section in which the thermoplastic polymer B is introduced as a melt into the extruder, a plastication section with mixing or kneading elements, a devolatilization section with an orifice and in which the remaining watType: GrantFiled: March 25, 1999Date of Patent: December 26, 2000Assignee: BASF AktiengesellschaftInventors: Norbert Guntherberg, Jurgen Hofmann, Elmar Mailahn, Hilmar Ohlig, Bernhard Czauderna, Sven Grabowski, Klaus Bus
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Patent number: 6149419Abstract: A first granulating unit A for molding molten resin of one color into pellets and a second granulating unit B for molding molten resin of the other color into pellets are provided in one screw type kneading extruder 1. The first granulating unit A is made to communicate with a discharge port 2a while the second granulating unit B is blocked. After the pellets of one color are molded in this state, the discharge port 2a is made open to the outside of the apparatus, and a thermoplastic resin material of the other color is kneaded and melted by means of the screw type kneading extruder 1, and discharged to the outside of the apparatus to thereby perform cleaning operation. Next, the second granulating unit B is made to communicate with the discharge port 2a while the first granulating unit A is blocked. In this state, the pellets of the other color are molded.Type: GrantFiled: February 5, 1999Date of Patent: November 21, 2000Assignee: The Japan Steel Works, Ltd.Inventors: Hideki Mizuguchi, Masaharu Ishida
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Patent number: 6033609Abstract: A spin pot for spinning synthetic polymer fibers has a polymer filter, a spinneret downstream of the polymer filter, and an electroformed perforated screen positioned between the polymer filter and the spinneret. The screen is most preferably electroformed nickel and includes an annular non-perforated region which bounds a perforated central region. The electroformed perforations prevent debris that may become dislodged from the filter unit from blocking the spinneret orifices thereby creating undesired "slow-holes".Type: GrantFiled: October 28, 1997Date of Patent: March 7, 2000Assignee: BASF CorporationInventors: Donald E. Wright, Albert R. Moorhead
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Patent number: 5961908Abstract: 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).Type: GrantFiled: March 18, 1998Date of Patent: October 5, 1999Assignee: Bayer Faser GmbHInventors: Ulrich Reinehr, Tilo Sehm, Wolfgang Anderheggen, Toni Herbertz
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Patent number: 5948449Abstract: The invention herein relates to a kind of slug production device for brick-making machines, specifically referring to a kind of slug production device that is mainly comprised of a raw brick mixture filler trough and a vacuum trough, below which are the the parallel and horizontal members of two pressure tubes and two forming tubes, and positioned at the rear of the two pressure tubes and the two forming tubes are a pair of pressure mechanisms and, furthermore, at the bottom section of the raw brick mixture filler trough and the vacuum trough is a swing-type aggregate crushing mechanism such that after the raw brick mixture is loaded into the filler trough, the raw brick mixture is conveyed precisely into the pressure tubes and the pressure mechanism pistons at the rear of the two pressure tubes operate in a reciprocal movement to convey the raw brick material slugs into the vacuum trough then the raw brick material aggregate conveyed into the vacuum trough are guided into the forming tubes by the pressure meType: GrantFiled: December 11, 1997Date of Patent: September 7, 1999Inventor: Yu-Fu Chen
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Patent number: 5914148Abstract: A method for producing a dough product from starch containing ingredients of cellular structure, to obtain a product containing at least 50 percent starch material. This method comprises extruding the ingredients by passing them through an extruder of a predetermined inner barrel diameter. Within this barrel, an extruder rotor of predetermined outer diameter is accommodated to exert a mixing, kneading and heating effect onto the ingredients and to form a substantially homogeneous mass. This mass is then discharged and distributed from the extruder under predetermined pressure into a straight heated tube of an inner cross-section larger than the outer diameter of the screw(s). In this way, a plug flow of the mass through the heated tube is established to cook the mass at a predetermined temperature and for a predetermined period. Finally, the mass is formed at the end of the tube into a desired shape, but maintains mostly its cellular structure at least in part.Type: GrantFiled: December 19, 1997Date of Patent: June 22, 1999Assignee: Buhler, Inc.Inventor: Massoud Kazemzadeh
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Patent number: 5851562Abstract: 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.Type: GrantFiled: May 13, 1996Date of Patent: December 22, 1998Assignee: Hills, Inc.Inventors: Jeff S. Haggard, Bryan Norcott
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Patent number: 5795595Abstract: A spinning pack with a sand filter for the melt spinning of thermoplastics, whereby at least one perforated plate with evenly distributed D-shaped holes with slanting openings that taper conically in the direction of flow is placed in the direction of flow in front of and/or behind the sand filter. Spinning packs according to the invention surprisingly give highly uniform distribution and flow of thermoplastic melt through the sand filter.Type: GrantFiled: September 9, 1996Date of Patent: August 18, 1998Assignee: Zimmer AktiengesellschaftInventors: Heinz-Dieter Beeck, Bernd Kretschmann, Wilhelm Sprick
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Patent number: 5766523Abstract: The present invention provides a blow spinning die particularly suited for spinning solvated pitch into fibers having a random cross-sectional structure. Additionally, the present invention provides a process for blow spinning fibers from solvated pitches. The present invention also provides pitch fibers having a high energy internal molecular structure. Finally, the present invention provides carbon fibers which have a non-radial internal structure.Type: GrantFiled: January 27, 1997Date of Patent: June 16, 1998Assignee: Conoco Inc.Inventors: John A. Rodgers, Daniel F. Rossillon, Roger A. Ross
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Patent number: 5601854Abstract: 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.Type: GrantFiled: October 5, 1994Date of Patent: February 11, 1997Assignee: Zimmer AktiengesellschaftInventors: Heinz D. Schroeder, Guenter Koschinek
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Patent number: 5578330Abstract: Use of a ribbon shaped flow configuration at the entrance to a round spinneret used for spinning carbon fibers from mesophase pitch promotes the formation of random microstructure and prevents formation of axial cracking in the fibers.Type: GrantFiled: March 23, 1995Date of Patent: November 26, 1996Assignee: Conoco Inc.Inventors: Roger A. Ross, Uel D. Jennings
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Patent number: 5562930Abstract: A distribution plate for use in a fiber-forming spin pack assembly has a thickness of from about 0.004 inches to about 0.060 inches. One or more flow channels are formed in at least one surface of the distribution plate. The flow channels are in the form of slots having a depth less than about 0.016 inches, not exceeding about 75% of the thickness of the distribution plate. There are also apertures through the thickness of the plate which connect to said slots.Type: GrantFiled: June 6, 1995Date of Patent: October 8, 1996Inventor: William H. Hills
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Patent number: 5552102Abstract: Extrusion die apparatus and an extrusion method for extruding large-cross-section honeycomb structures from plasticized ceramic batch materials are described, the apparatus comprising a die having a support rod connected to its central portion, the support rod being anchored to support means upstream of the die. The support rod and support means act to limit die distortion during extrusion, reducing die strain and stress to levels permitting large honeycomb extrusion without die failure. Dies of optimal thickness are disclosed which reduce the maximum stresses exerted on the die during extrusion.Type: GrantFiled: December 16, 1994Date of Patent: September 3, 1996Assignee: Corning IncorporatedInventors: Harry A. Kragle, David W. Lambert, G. Daniel Lipp
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Patent number: 5533883Abstract: A spin pack for spinning synthetic fibers from two or more liquid polymer streams includes a supply for at least two discrete polymer streams without mixing with another discrete stream to the spin pack; a spinneret having extrusion orifices; and flow distribution plate sets. The flow distribution plate sets include at least one patterned plate having edges which define a substantially regular two-dimensional geometric shape, a substantially planar upstream surface, a substantially planar downstream surface and at least one flow distribution pattern stenciled therein by cutting through. For each patterned plate, at least one boundary plate stacked sealingly adjacent thereto and having edges which define a substantially regular geometric shape, a substantially planar upstream surface and a substantially planar downstream surface.Type: GrantFiled: October 18, 1993Date of Patent: July 9, 1996Assignee: BASF CorporationInventors: John A. Hodan, Otto M. Ilg
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Patent number: 5513973Abstract: A melt spinning apparatus is disclosed which includes a supporting housing, a melt supply block mounted in the upper end of the housing, and a spin plate mounted adjacent the lower end of the housing so as to define a spinning chamber between the block and plate. A melt diverting plate is positioned in the spinning chamber for deflecting the melt entering into the chamber, and the melt diverting plate is configured such that substantially the same pressure drop occurs in the melt as it moves from the melt supply duct to all portions of the upper surface of the spin plate, so as to achieve a substantially uniform denier among the resulting filaments.Type: GrantFiled: January 18, 1994Date of Patent: May 7, 1996Assignee: Barmag AGInventors: Gerd Keil, Erich Lenk, Eberhard Fenger
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Patent number: 5499913Abstract: A device for producing honeycomb structural bodies, including an a extruding die, and a porous plate provided on a side of an inlet of the extruding die for the molding material, The passage resistance of the molding material through the porous plate is varied in a direction orthogonal to an extruding direction of the molding material.Type: GrantFiled: October 27, 1993Date of Patent: March 19, 1996Assignee: NGK Insulators, Ltd.Inventors: Tomiaki Hagino, Mamoru Furuta, Kaname Fukao
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Patent number: 5500239Abstract: A method and apparatus for the manufacture of a pet food having a transverse, fibrous striated matrix which imparts a superior mechanical cleaning action to the teeth of a pet when chewed. The apparatus includes an extruder through which a fiber bearing food mixture is advanced, the discharge outlet end of which is equipped with a die assembly which induces a state of laminar flow in the food material stream. The die assembly is constructed of a first spacer plate having an annular opening positioned to receive and stabilize the food stream advanced through the die assembly. A breaker plate adjacent to the first spacer plate, receives the flow stabilized food stream and effects a first, discontinuous, alignment of the fibers in the stream. A second spacer plate receives the food stream discharged form the breaker plate. The second spacer plate has a length at least twice that of the first spacer plate, whereby the fibers in the food stream are aligned into a continuous transversely aligned state.Type: GrantFiled: March 15, 1995Date of Patent: March 19, 1996Assignee: Colgate Palmolive CompanyInventor: Larry H. Hayward
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Patent number: 5466142Abstract: The two-component extrusion head having a spinneret with high perforation density has a distribution unit for introducing a first component along a first direction and for introducing a second component along a second direction. The distribution unit introduces the two components with a preset distribution ratio between the two components in a transit region which is connected to a spinneret which has holes that extend along directions which are substantially parallel to the first direction and has a perforation density in excess of ten holes per square centimeter.Type: GrantFiled: September 30, 1993Date of Patent: November 14, 1995Inventor: Mario Miani
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Patent number: 5407586Abstract: A filter assembly used in combination with an extruder producing a stream of pressurized molten plastic has an inlet plate formed with a Y-shaped inlet passage having a substantially circular-section upstream end adapted to receive the stream of pressurized molten plastic from the extruder. The inlet passage branches downstream of its upstream end and has a pair of downstream ends opening at substantially circular downstream ports. An outlet plate fixed immediately downstream of the inlet plate is formed with a Y-shaped outlet passage having a substantially circular-section downstream end. The outlet passage is branched symmetrically to the inlet passage upstream of its downstream end and has a pair of upstream ends opening at substantially circular upstream ports aligned with the downstream ports. A rotatable filter disk engaged between the plates is formed with a circularly annular array of substantially circular-section throughgoing holes each defining a respective substantially circular seat.Type: GrantFiled: August 3, 1994Date of Patent: April 18, 1995Assignee: Gneuss Kunststofftechnik GmbHInventor: Detlef Gneuss
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Patent number: 5387097Abstract: A spin pack includes a spinneret holder, a spinneret, a filter pack and an axially movable thrust piece having a central channel and seals. The seals are used according to the invention being two tubular, radially sealing elements (seal or part of a seal).Type: GrantFiled: December 7, 1992Date of Patent: February 7, 1995Assignee: Akzo NVInventors: Herbert Scheiber, Wolfgang Peschke
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Patent number: 5362223Abstract: A filter assembly used in combination with an extruder producing a stream of pressurized molten plastic has an inlet plate formed with a Y-shaped inlet passage having a substantially circular-section upstream end adapted to receive the stream of pressurized molten plastic from the extruder, The inlet passage branches downstream of its upstream end and has a pair of downstream ends opening at substantially circular downstream ports. An outlet plate fixed immediately downstream of the inlet plate is formed with a Y-shaped outlet passage having a substantially circular-section downstream end, The outlet passage is branched symmetrically to the inlet passage upstream of its downstream end and has a pair of upstream ends opening at substantially circular upstream ports aligned with the downstream ports.Type: GrantFiled: May 10, 1993Date of Patent: November 8, 1994Assignee: Gneuss Kunststofftechnik GmbHInventor: Detlef Gneuss
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Patent number: 5304052Abstract: 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.Type: GrantFiled: May 14, 1993Date of Patent: April 19, 1994Assignee: Zimmer AktiengesellschaftInventors: Heinz D. Schroeder, Rainer Tietze, Guenter Koschinek
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Patent number: 5254299Abstract: An improved method of melt spinning linear polyethylene into fiber, especially fine denier fiber, with minimal fiber breakage is disclosed. The method includes imparting high shear into the polyethylene just prior to extrusion through the spinneret die and also results in lower die swell. The high shear can be imparted by use of sintered metal filter media, multiple stacks of fine mesh screens or similar shear inducing media. The method is especially effective when the linear polyethylene contains a relatively high molecular weight species, as determined using gel permeation chromatography with a low angle laser light scattering detector.Type: GrantFiled: August 27, 1991Date of Patent: October 19, 1993Assignee: The Dow Chemical CompanyInventors: Stephen P. Krupp, John O. Bieser, Edward N. Knickerbocker
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Patent number: 5234650Abstract: A spin pack for spinning multiple components includes a distribution device which distributes mutually separated molten polymer streams to a spinneret so that each mutually separated molten polymer stream is accessible at each active spinneret backhole. Intermediate the spinneret and the distribution device, a selection assembly selects which, if any, mutually separated molten polymer stream flows into which backhole.Type: GrantFiled: March 30, 1992Date of Patent: August 10, 1993Assignee: BASF CorporationInventors: Gerry A. Hagen, Dominick A. Burlone, Phillip E. Wilson
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Patent number: 5217762Abstract: 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.Type: GrantFiled: April 25, 1991Date of Patent: June 8, 1993Assignee: Hoechst AktiengesellschaftInventor: Detlef Frank
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Patent number: 5162074Abstract: A method for extruding a wide variety of plural-component fiber configurations in a spin pack utilizes one or more disposable distributor plates in which distributor flow paths are etched on one or both sides to distribute the polymer components to appropriate spinneret inlet hole locations. The etching process permits the distribution paths to be sufficiently small to facilitate issuing multiple discrete polymer component streams axially into each spinneret orifice inlet hole, whereby the resulting extruded fiber can be made up of at least one hundred side-by-side sub-fibers. If the adjacent sub-fibers are weakly bonded, they can be readily separated by agitation to significantly increase the effective yield from the spin pack and provide very fine and uniform fibers.Type: GrantFiled: August 7, 1989Date of Patent: November 10, 1992Assignee: BASF CorporationInventor: William H. Hills
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Patent number: 5158730Abstract: This invention relates to an extruder having a granulating head for the granulation of a plastic molding compound which does not flow under gravity, more particularly an enzyme concentrate suitable for detergents, to granules having a particle size of at most 1 mm and, more particularly, at most 0.8 mm. To obtain uniform distribution of the molding compound to be processed over the entire cross-section of the molding plate, the granulating head has an externally arranged die plate support carrying perforated disks, a displacement cone arranged behind the die plate support and a preliminary distributor in the form of a perforated plate arranged between the die plate support and the displacement cone.Type: GrantFiled: May 20, 1991Date of Patent: October 27, 1992Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Hubert Pawelczyk, Franz-Josef Carduck
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Patent number: 5154934Abstract: The invention relates to the alternate high-molecular arrangements manufactured through apparatus wherein the layers of at least two component high-molecular fluids are formed into layers and so combined with another high-molecular fluid that the former's layers intersect the latter's and the combined flow of the layers is divided into a number of layers.In accordance with the invention, islands in alternate high-molecular arrangements can be increased to a high ratio easily and economically.Type: GrantFiled: January 5, 1987Date of Patent: October 13, 1992Assignee: Toray Industries, Inc.Inventor: Miyoshi Okamoto
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Patent number: 5125823Abstract: Apparatus for filtering plasticized material between two discrete inlets and a main outlet of a housing has two passages each of which connects one of the inlets with the main outlet. Each passage receives a reciprocable cylindrical filter carrier which can establish or interrupt a path for the flow of plasticized material from the respective inlet to the main outlet, depending on the selected axial position of the carrier. In order to expel contaminants which gather at the upstream side of the filter in a carrier, the carrier which is to be relieved of contaminants is moved to an axial position in which the respective inlet is sealed and the space at the downstream side of the filter receives filtered plasticized material substantially centrally of the filter. Contaminants are expelled from the space at the upstream side of the filter by way of a second outlet which is provided in the housing and communicates with the filter chamber of the carrier which is in the process of being relieved of contaminants.Type: GrantFiled: January 24, 1991Date of Patent: June 30, 1992Assignee: Kreyenborg Verwaltungen und Beteiligungen KGInventor: Udo Kreyenborg
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Patent number: 5004414Abstract: Apparatus for filtering plasticized material between the inlet and the outlet of a housing has two parallel passages for reciprocable filter carriers each of which is movable between a first position and a second position. When in their first positions, the carriers permit plasticized material to flow from the inlet, through filters in their filter chambers and then into the outlet of the housing.Type: GrantFiled: December 5, 1989Date of Patent: April 2, 1991Assignee: Kreyenborg Verwaltungen und Beteiligungen KGInventors: Rolf-Rudiger Stude, Ludger Wilken-Trenkamp
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Patent number: 4875846Abstract: 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.Type: GrantFiled: August 28, 1987Date of Patent: October 24, 1989Inventor: Heinz Reinbold
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Patent number: 4849148Abstract: Filaments are produced from polymers having an inherent viscosity of at least 0.7 measured in concentrated sulfuric acid and containing in the polmer chain at least 50 percent of the repeating units. ##STR1## by melting the polymer and heating the melt to a temperature of from about 20.degree. C. to about 80.degree. C. above the melting point of the polymer, passing the melt through a filter pack having a filtering area of at least about 8 in.sup.2 and a total volume of at least about 1.2 in.sup.3 per pound of polymer extruded per hour, and containing inert, irregularly shaped particles having a mesh size of about 25 to 140 to provide a pressure drop at least about 800 psig., and extruding the melt through spinning openings of desired shape to form filaments. The process is capable of producing fibers and yarns having a dpf of about 15 to 100, a tenacity of about 1 to 2 grams per denier, an elongation at break of about 50 to 160 percent and a modulus of about 20 to 30 grams per denier.Type: GrantFiled: October 6, 1987Date of Patent: July 18, 1989Assignee: Hoechst Celanese Corp.Inventor: Martin H. G. Deeg
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Patent number: 4814187Abstract: A honeycomb structural body-extruding die apparatus is disclosed herein, which includes an extruding die and a die mask provided around an outer peripheral portion of the extruding die on an extruding material outlet side. The extruding die also includes a plurality of extruding material-feeding holes formed on the extruding material inlet side and a plurality of shaping channels formed communicating with each other in a lattice fashion on the extruding material outlet side. The honeycomb structural body-extruding die apparatus is further provided with an annular perforated plate arranged concentrically with the extruding die on the extruding material inlet side. The perforated plate has through holes of which respective central axes are in conformity with those of the extruding material feeding holes.Type: GrantFiled: December 7, 1987Date of Patent: March 21, 1989Assignee: NGK Insulators, Ltd.Inventors: Satoru Inoue, Kozo Higashizima
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Patent number: 4812276Abstract: A method for forming honeycomb structures by stepwise formation of channel walls reduces the pressure loading imposed by the extrudable material on a die that uses this method, facilitates the formation of well knitted channel walls, and requires only a minimum amount of lateral flow in the discharge zone to perform final interconnections between channel walls that have been substantially formed upstream of the discharge zone. The method presses extrudable material in substantially axial flow through a fist partitioning zone and subdivides the material into a series of flow segments having on their outer surfaces a portion of the channel wall surfaces formed. The extrudable material passes from the first partitioning zone in substantially axial flow while at least a portion of the channel walls formed in the first partitioning zone are maintained on the surface of the segments.Type: GrantFiled: April 29, 1988Date of Patent: March 14, 1989Assignee: Allied-Signal Inc.Inventor: Tai-Hsiang Chao
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Patent number: 4804510Abstract: A filtering system for use in coextrusion apparatus, and particularly for removing carbon particles from a core extrudate of thermally degradable barrier material which has been preencapsulated with a preencapsular material. The filter includes a casing and a frame mounted to the casing. A coarse filter screen through which the component streams can flow is also provided. The coarse filter screen is mounted to the frame and is composed of a web of woven strands having a sufficiently small diameter so as to permit the preencapsulated core extrudate to pass through and emerge from the coarse filter screen without substantial mixing of the barrier material and the preencapsular material. The fine filter screen is supported by the coarse filter screen upstream of the coarse filter screen.Type: GrantFiled: June 30, 1987Date of Patent: February 14, 1989Assignee: The Dow Chemical CompanyInventors: Robert A. Luecke, Gordon E. Gould, Paul M. Curtin
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Patent number: 4753762Abstract: A method of forming foamed fibers which comprises the steps of forming a melt of a polymer of fiber-forming molecular weight in which is admixed a blowing agent, and a closed-cell-forming additive, extruding said melt through a spinnerette, quenching said melt downstream of said spinnerette under conditions at which bubbles form in said melt, and drawing said melt as it is quenched to produce a foamed fiber having fine bubbles contained therein is disclosed. The product fibers may contain substantially only closed-cells and/or substantially uniform cross sectional area cells.Type: GrantFiled: July 8, 1985Date of Patent: June 28, 1988Assignee: Allied CorporationInventors: Hsin L. Li, Theodore Largman, Frank Mares, Hendrikus J. Oswald
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Patent number: 4747988Abstract: Filaments are produced from polymers having an inherent viscosity of at least 0.7 measured in concentrated sulfuric acid and containing in the polymer chain at least 50 percent of the repeating units: ##STR1## by melting the polymer and heating the melt to a temperature of from about 20.degree. C. to about 80.degree. C. above the melting point of the polymer, passing the melt through a filter pack having a filtering area of at least about 8 in.sup.2 and a total volume of at least about 1.2 in.sup.3 per pound of polymer extruded per hour, and containing inert, irregularly shaped particles having a mesh size of about 25 to 140 to provide a pressure drop at least about 800 psig., extruding the melt through spinning openings of desired shape to form filaments and passing the filaments immediately upon extrusion through a heating zone maintained at a temperature of about 200.degree. to 320.degree. C. and having a length of about 3 to 12 inches.Type: GrantFiled: June 14, 1985Date of Patent: May 31, 1988Assignee: Hoechst Celanese CorporationInventor: Martin H. G. Deeg
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Patent number: 4747986Abstract: An extrusion die for producing multichanneled structures from an extrudable material. The die is composed of a series of pins that correspond to the shape of the channels in the structure. At one end of the pins, the area between the pins is open to define a discharge zone having the shape of the structure. At their opposite ends, the pins are connected about adjacent corners by a series of webs. Slots bordered by the pins and the webs define a series of feed passages that communicate with the discharge zone at areas of reduced width between adjacent pins.Type: GrantFiled: December 24, 1986Date of Patent: May 31, 1988Assignee: Allied-Signal Inc.Inventor: Tai-Hsiang Chao
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Patent number: 4738607Abstract: 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.Type: GrantFiled: December 19, 1986Date of Patent: April 19, 1988Assignee: Chisso CorporationInventors: Sadaaki Nakajima, Taiju Terakawa
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Patent number: 4727687Abstract: Cryogenic cleaning apparatus using dry ice pellets having a pellet extruder and static means to break the extruded dry ice.Type: GrantFiled: December 14, 1984Date of Patent: March 1, 1988Assignee: Cryoblast, Inc.Inventor: David E. Moore
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Patent number: 4725215Abstract: An extruder wherein the housing which defines a passage for the flow of foamed plastic material at elevated pressure and temperature to the shaping station contains a reciprocable carrier of one or more filters. The carrier has a filter compartment and is movable relative to the housing between a first position wherein the plastic material must flow from the inlet of the passage, through the compartment and the filter therein, and on to the outlet of the passage, and a second position in which the compartment is sealed from the passage. An expansion chamber in the housing and/or in the carrier communicates or can be caused to communicate with the compartment in the second position of the carrier so as to allow for a controlled reduction of pressure of plastic material before the compartment is made accessible for removal of inspection of the filter in the compartment. The compartment is thereupon rendered accessible, either in the second position of the carrier or by moving the carrier to a further position.Type: GrantFiled: December 24, 1986Date of Patent: February 16, 1988Assignee: Kreyenborg Verwaltungen und Beteiligungen KGInventors: Udo Kreyenborg, Horst Koching
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Patent number: 4701118Abstract: Apparatus for filtering a stream of plasticized synthetic plastic material in an extruder has a housing with four or more channels connecting a material-admitting inlet with a material-discharging outlet. The housing is formed with parallel bores each of which receives a single reciprocable cylindrical carrier of two or more filters or two independently reciprocable cylindrical carriers of discrete filters. Each carrier can be moved between a first position in which its filter or filters register with discrete channels of the housing and at least one additional position in which its filter or one of its filters is accessible. At least 75 percent of filtering capacity remains available when a filter is being inspected, cleaned or replaced. The carriers seal those channels which are not in line with filters while the carriers are out of their first positions.Type: GrantFiled: May 16, 1986Date of Patent: October 20, 1987Assignee: Kreyenborg Verwaltungen und Beteiligungen KGInventors: Horst Koching, Rolf-Rudiger Stude
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Patent number: 4698009Abstract: A granulator for forming granules of cross-linkable plastic compounds in which a screw extruder extrudes the compound into the smaller diameter end of a funnel-shaped, annular conduit, the other end of the conduit facing a die with circular arrays of through-holes. The compound which passes through the through-holes is cut into granules by rotating blades having air nozzles which remove particles of the compound from the blades. The granules are received in a chamber from which they are removed pneumatically. Where the annular conduit meets the die, there are channels within and outside of the arrays of through-holes which lead to the outside of the granulator and which provide conduits for removal of compound which does not directly impinge on the entrances of the through-holes which are specially shaped to avoid accumulation of the compound between the through-holes.Type: GrantFiled: May 16, 1986Date of Patent: October 6, 1987Assignee: Societa' Cavi Pirelli S.p.A.Inventors: Carlo Marin, Gianmario Lanfranconi, Andrea Borroni
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Patent number: 4686074Abstract: The invention relates to the alternate high-molecular arrangements manufactured through the processes wherein the layers of at least two component high-molecular fluids are formed into layers and so combined with another high-molecular fluid that the former's layers intersect the latter's and the combined flow of the layers is divided into a number of layers, to the processes and to the systems therefor.In accordance with the invention, the islands in alternate high-molecular arrangements can be increased to a high ratio much easily and economically.Type: GrantFiled: October 31, 1984Date of Patent: August 11, 1987Assignee: Toray Industries, Inc.Inventor: Miyoshi Okamoto
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Patent number: 4623307Abstract: A flowable substance is extruded from two coaxial telescoping cylindrical containers of which the outer is provided with openings on its periphery and is rotatable about the inner container. The substance is fed to the inner container and exits via a row of openings therein. As the outer container rotates, the inner and outer openings radially coincide cyclically whereby the substance falls in the form of drops onto a belt and solidifies. The row of openings of the inner container is provided in a nozzle bar which is removably attached to the periphery of a body part of the inner container.Type: GrantFiled: September 14, 1984Date of Patent: November 18, 1986Assignee: Santrade Ltd.Inventor: Reinhard Froeschke
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Patent number: 4597870Abstract: A filter device for a screw extruder for the handling of molten plastic comprising a filter housing having inlet and outlet bores and a slide displaceable in the housing transverse to the direction of the flow of the melt. At least one recess in the slide forms a portion of a melt channel and receives a screen member. In order to obtain uniform distribution of the flow of melt in the filter device and of the pressure forces acting on the filter surface, the recess is formed by an annular milling which is surrounded by a replaceable cylindrical screen member. A flow passage in the slide extends from the melt channel to the outlet bore.Type: GrantFiled: May 22, 1985Date of Patent: July 1, 1986Assignee: Werner & PfleidererInventor: Friedrich Lambertus
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Patent number: RE35108Abstract: A spin pack for spinning multiple components includes a distribution device which distributes mutually separated molten polymer streams to a spinneret so that each mutually separated molten polymer stream is accessible at each active spinneret backhole. Intermediate the spinneret and the distribution device, a selection assembly selects which, if any, mutually separated molten polymer stream flows into which backhole.Type: GrantFiled: April 8, 1994Date of Patent: December 5, 1995Assignee: BASF CorporationInventors: Gerry A. Hagen, Dominick A. Burlone, Phillip E. Wilson