Abstract: The invention relates to a method and a device for cooling an extruded thermoplastics pipe (1) by directing a gaseous cooling medium tangentially towards the inner surface of the thermoplastics pipe (1) along its whole periphery, whereby the interior of the thermoplastics pipe (1) is divided by means of a protecting pipe (8) into an outer ring-shaped flow channel (9) for the cooling medium along the inner surface of the thermoplastics pipe (1), and a central return channel (10) through which a part of the cooling medium is intended to be sucked back influenced by the flow of cooling medium in the outer ring-shaped flow channel (9), and to be redirected towards the inner surface of the thermoplastics pipe (1).

Abstract: The invention provides a method for manufacturing spun-bonded nonwoven fabrics that can reduce the diameter of a filament without decreasing productivity and can stably produce nonwoven fabrics, comprising: quenching a multiple number of continuous melt-spun filaments through spinning nozzles with quench air fed to a quenching chamber, drawing the filaments, and depositing the filaments on a moving collector surface, wherein the quench air fed to the quenching chamber is divided into at least 2 streams in vertical direction, and an air velocity of the quench air in the lowermost stream is set higher than that of the 50 quench air in the uppermost stream. The invention also provides an apparatus for manufacturing spun-bonded nonwoven fabrics, wherein quench air fed to the quenching chamber is divided into at least 2 streams in the vertical direction, wherein the velocities of the quench air are independently controllable in the respective streams.

Abstract: Apparatus and method for producing fibrous materials in which the apparatus includes an electrospinning element configured to electrospin a substance from which the fibers are to be composed by an electric field extraction of the substance from a tip of the electrospinning element, a collector disposed from the electrospinning element and configured to collect the fibers, a chamber enclosing the collector and the electrospinning element, and a control mechanism configured to control a gaseous environment in which the fibers are to be electrospun.

Abstract: A plate-like shape die 1 for forming a honeycomb structure provided with an introduction portion 3 having plural back holes on one side face (an introduction side) thereof and a formation portion provided with silts 6 communicating with plural back holes 7 on other side face thereof; using for forming a honeycomb shape with passing raw materials being introduced from back holes 7 of an introduction portion 3 through silts 6 being provided on the forming portion 2, wherein the introduction portion 3 is composed of two layers of a plate-like abrasion portion 5 constituting an introduction face 8, and an introduction portion main body 4 located between the abrasion portion 5 and the forming portion 2, and the abrasion portion 5 is detachably disposed on the introduction portion main body 4.

Abstract: An injection head (10) is described for a corrugator which is intended for the production of plastics pipes. The injection head (10) has a main head (12), a nozzle body (14) and a mouthpiece means (16) with at least one mouthpiece (32, 36). The main head (12) is embodied with first channels (50, 52) and the nozzle body (14) is embodied with second channels (58, 60) which are flow-connected to the first channels (50, 52). The/each mouthpiece (32, 36) has a central body (74, 76) and a sleeve body, (78, 80) surrounding said central body. On its lateral surface (82, 84) facing the sleeve body (78, 80), the central body (74, 76) is embodied with wound plastics distributor grooves (86, 88) which are flow-connected by means of connecting portions (114, 120) to a concentric annular groove (112, 116) which is formed on the reverse surface (90, 92) of the central body (74, 76) and into which the second channels (58, 60) of the nozzle body (14) discharge.

Abstract: A method is disclosed for high volume production of molded dimensionally accurate polymer composite articles comprising three-dimensional carbon fiber reinforcement in high volume. Carbon fiber cloth infiltrated with a liquid thermosetting polymer precursor is shaped by application of pressure to urge the cloth against the surface of a mold and then heated while under pressure to cure the polymer precursor into a solid polymeric matrix for the carbon fiber article. Mold tooling is formed of suitable iron-nickel alloys and provided with a hard electroless nickel coating on the mold cavity surface. The iron and nickel alloy provides thermal expansion properties generally matched to those of the articles for the molding of dimensionally accurate parts.

Abstract: A method includes steps of extruding rubber or synthetic resin mixed with short fibers from a sectionally annular mold opening, and molding a cylindrical body of rubber or synthetic resin with short fibers oriented in a predetermined direction. The mold opening has an expansion portion 9 whose diameter expands in an extrusion direction, and a flow passage width Wi of an inlet portion 6i of the mold opening, a flow passage width Wo of an outlet portion 6o, and radiuses Ri and Ro of the inlet portion 6i and the outlet portion 6o respectively that are coaxial with the mold opening satisfy a relation of Wo/Wi<Ro/Ri. The value of Ro/Ri is adjusted within a scope of 2?Ro/Ri?8 by changing the radius Ri of the inlet portion according to mechanical properties in the circumferential direction of the cylindrical body to be molded, so that orientation of the short fibers is adjusted.

Abstract: The present invention generally relates to a cooling process and system that can be utilized in the manufacture of flexible elongate extruded materials, such as tubing or jacketed electrical wire and cable. More particularly, the present invention relates to a cooling trough for cooling flexible elongate extruded materials after extrusion. Cooling trough embodiments have a base, a wet cooling chamber above the base, and an air dry chamber above the wet cooling chamber. The base contains a reservoir for collecting and storing a cooling liquid. An extruded material, such as a cable, enters the wet cooling chamber, where the cooling liquid from the reservoir is sprayed onto the material, the material is then passed to the air dry chamber where it is dried.

Abstract: An apparatus comprises: forming means movable along a first path for compression moulding doses of plastics; a plurality of transfer means for transferring said doses to said forming means; a plurality of arm means, each arm means being associated with a corresponding transfer means for moving said transfer means along a second path having a portion substantially coinciding with a further portion of said first path.

Abstract: The invention relates to the extrusion of tire components with a large change of gauge across their cross-sectional area. It is provided a method and an assembly for extruding such a tire component with an extruder feeding a flow channel with a downstream die opening, whereby a deflector is provided in the flow channel upstream the die opening such that a flow of rubber is slowed down in front of broad portions of the cross-sectional area of the downstream die, avoiding distortion or bending of the extruded tire component.

Abstract: A die for forming a honeycomb structure is provided with back pores through which a forming material is introduced and slits through which the forming material is extruded into a lattice-like shape, and the die comprises a first plate-like member made of a super hard alloy containing tungsten carbide and a bonding agent and provided with the back pores extending in a thickness direction; and a second plate-like member bonded to the first plate-like member, made of the super hard alloy containing tungsten carbide and the bonding agent, and provided with the slits connected to the back pores, wherein the bonding agent is dispersed in a lesser amount in a bonded part between the first plate-like member and the second plate-like member than in the other part.

Abstract: An improved reinforcing element, and devices and methods for producing a wrapped assembly reinforcing element comprising at least one center core member formed from at least one center core strand, wherein the at least one center core member is wrapped with a reinforced thermoplastic resin comprising complete fiber strand dispersion and wet out without breaking fiber filaments after cutting the fiber to a designated length in the wrapping resin. The resulting wrapped assembly may be used in a variety of ways, including virtually any construction project requiring a lightweight reinforcing member with high tensile and compression strength.

Abstract: An extrusion die configured to have an interior chamber sealed from the atmosphere is disclosed. The extrusion die includes an extrusion die head disposed at a downstream end of the interior chamber; and a vacuum seal disposed at an upstream end of the interior chamber; wherein the vacuum seal is configured to selectively form a seal between the extrusion die and a product disposed in the interior chamber. The vacuum seal includes an annular sealing surface disposed at an inner diameter of the vacuum seal; a hollow, interior chamber; and a plurality of bellows disposed between the annular sealing surface and the extrusion die; wherein the vacuum seal is configured to selectively form a seal between the extrusion die and a product disposed in the interior chamber. A method of selectively sealing an end of an extrusion die is also disclosed.

Abstract: Disclosed is a nozzle block for electrospinning which is able to simultaneously electrically spin two or more different types of polymer spinning dopes, wherein a single-layer distribution plate for dividing a planar space within the nozzle block into two or more segments is installed within the nozzle block. The apparatus is simple because a single-layer distribution plate is installed instead of a conventional multi layer distribution plate. A hybrid nano fiber laminate can be prepared without any additional laminating procedure because two or more different polymer spinning dopes can be simultaneously electrically spun through different nozzles arranged within the same nozzle block. It is possible to prepare a hybrid nano fiber nonwoven fabric or filaments or the like composed of two or more types of nano fibers different in thermal properties or physical properties because their fiber diameter or polymer type are different from each other.

Abstract: The present invention relates to an electrospinning apparatus for mass-production of nanofibers, particularly to an electrospinning apparatus with an electric stability and an improved nozzle blocks. The bottom-up electrospinning apparatus for the mass-production of nanofiber comprises at least one nozzle block having a plurality of spinning nozzles arranged in the horizontal and vertical direction; a collector installed over the nozzle blocks in order to correspond to the nozzle blocks and maintain a certain distance in between; a power source to apply voltage difference between the nozzle block and the collector; and a spinning solution container to supply the spinning solution to the nozzle block, wherein the nozzle block and the collector are connected to the positive terminal and the negative terminal, respectively and among a plurality of spinning nozzles arranged along the horizontal line, a spinning nozzle in the middle and a spinning nozzle in the end have different height.

Abstract: A dual-filled gum piece is provided having a first cavity filled with a liquid filling and a second cavity filled with a powder filling. The gum pieces are produced by extruding a gum rope having two separate channels respectively filled with liquid and powder, sizing and shaping the gum rope, cooling the gum rope, cutting the rope into discrete gum pieces, and finally cooling the gum pieces. The gum pieces optionally can be coated with a hard coating. In other aspects for single- and dual-filled gums, a process for making the gum pieces employs a rope sizer that reduces the diameter of the gum rope and shapes it to have a non-round cross-section, and a multi-story cooling tunnel having individually motor-driven conveyors.

Abstract: An apparatus for producing a parison having a plurality of resin layers and at least one resin layer of varying thickness is disclosed. The parison is used to form containers in a blow mold machine. An extruder is in communication with a flow head to form the parison. The apparatus includes a valve block having a duct providing communication between a second extruder and the flow head. Flow of resin from the second extruder directly to the flow head is controlled by a valve in the valve block. An accumulator cylinder and piston are also in communication with the duct and control the resin pressure within the duct. Opening and closing the valve and stroking the piston sends resin from the second extruder to the flow head and forms a resin layer having a varying thickness on the parison. A method of forming a varying layer is also disclosed.

Abstract: An improved apparatus for producing a rolled snack piece using an extruder having typically a plurality of orifices through which an extrudate exits the extruder. Each of these orifices is spiral shaped. When a desired length of extrudate stream or rope protrudes from an orifice, it is cut at its base, thus producing individual snack pieces that appear to have been rolled after being sheeted.

Abstract: An extrusion die comprises a die body defining a die cavity (18). The cavity (18) is shaped such that the die body includes a male portion (24) and a female portion (26). A leading edge (18a) of a part of one side of the die cavity (18) is out of alignment with a leading edge (18a) of an opposing part of the die cavity (18), at rest, such that, in use, when deflection of parts of the die occurs, the leading edges (18a) substantially align.

Abstract: A spinneret format, an electric-field reversal format and a process for post-treatment of membranes formed from electro-spinning or electro-blowing are provided, including a cleaning method and apparatus for electro-blowing or blowing-assisted electro-spinning technology.