Abstract:
A method for extruding a sheet (1) made of expanded polymer, or cellular polymer such as an expanded polyolefin typically made of polyethylene or polypropylene, by means of an extrusion head (2) composed of a female die (3) and a male die (4) that define a duct for the extrusion of the polymer, the female die (3) or the male die (4) having a plurality of holes (5) that accommodate a plurality of needles (6) that are axially perforated and can be arranged at the duct for the extrusion of the polymer and exit therefrom, the plurality of needles (6) being affected by a fluid (7) that expands during the extrusion of the polymer so as to allow to obtain a tube (8) which, cut longitudinally, defines a sheet (1) provided with distinct axial seats (9)
Abstract:
A fluid application device having an applicator head, a slot die assembly and a securing mechanism for securing the slot die assembly to the applicator head is provided. The slot die assembly includes a die extruder comprising one or more fluid, input ports configured to receive a fluid from the applicator head, a shim positioned adjacent to the die extruder, and a plate positioned adjacent to the shim on a side of the shim opposite from the die extruder. The securing mechanism includes a securing component at one of the applicator head and the slot die assembly and a corresponding securing component at the other of the applicator head and slot die assembly.
Abstract:
Methods and apparatus for coating substrates. A die (110) can be employed for extrusion coating an elongated substrate, where the die (110) defines a coating cavity (134) therein. The die (110) can comprise a die block (120) having a coating supply channel (130) for supplying a coating material to the coating cavity (134). The die (110) can further comprise a guide plug (112) and a die plate (118) removably coupled to the die block (120). The guide plug (112) can comprise a substrate inlet (149) having a non-circular lateral cross - section, and the die plate (118) can comprise a substrate outlet (190) also having a non-circular lateral cross - section. A coating system comprising such a die (110) can operate to coat a substrate where the substrate can be pushed at least partially through the die (110) and contacts the coating material therein.
Abstract:
A method for preparing coated binder units wherein the coated binder units comprise a core of binder coated with a layer of coating material, wherein the binder is a bituminous binder or a synthetic binder comprising a resin, an oil and optionally a polymer, which method comprises the steps of : (a) supplying the binder and the coating material to an co-extrusion device which comprises an even number of pairs of inner and outer dies, whereby the binder is supplied to the inner dies and the coating material is supplied to the outer dies; (b) co-extruding the binder and the coating material by means of the co-extrusion device, thereby producing streams of extrudate in which the binder is coated with a layer of the coating material; and (c) optionally, shaping the streams of extrudate, into units of the coated binder. The invention further relates to the co-extrusion device.
Abstract:
In order to achieve an economical and trouble-free continuous extrusion of plastic hollow profiles having at least one hollow chamber that is filled with foam, the profile tool of an extrusion device is configured in the shape of a pistol. The profile tool comprises a pistol shaft (102) with a melt feed channel (166), which is connected to the melt discharge opening of the extruder (300) and which opens into a melt radial distributor channel (164) that surrounds the lance guide channel (150). The profile tool is also equipped with a pistol barrel (101) comprising a melt ring channel (162), which extends from the melt radial distributor channel (164) to the profile nozzle (160) and comprising a lance guide channel (150), which extends in a continuous manner from a lance inlet (152) to the profile nozzle (160).
Abstract:
A fluid application device (10) having an applicator head (14), a slot die assembly (12) and a securing mechanism for securing the slot die assembly to the applicator head is provided. The slot die assembly includes a die extruder (16) comprising one or more fluid input ports configured to receive a fluid from the applicator head, a shim (18) positioned adjacent to the die extruder, and a plate (20) positioned adjacent to the shim on a side of the shim opposite from the die extruder. The securing mechanism includes a securing component at one of the applicator head and the slot die assembly and a corresponding securing component at the other of the applicator head and slot die assembly.
Abstract:
A shim stack foaming die for making foam slabs comprises a plurality of shims that are layered together under pressure to form a shim stack, wherein the shims combine to collectively define a plurality of die orifices in a working face, to define a main body of the shim stack foaming die, and also to define a plurality of die cavity that is fluidly connected to the plurality of die orifices. And articles foamed from the shim stack foaming die have found wide use in various applications, thermal or acoustic insulation, reinforcing layers and/or space-filling layers, and so on.
Abstract:
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum Erhöhen der Kühlleistung einer Extrusionslinie und zum energieeffizienten Extrudieren eines Kunststoffprofils, insbesondere eines Kunststoffrohres, umfassend mindestens einen Extruder (6), ein das dem Profil (6) die Form gebende Werkzeug (2), bestehend aus mindestens einem Innenkranz (2a) und einem Außenkranz (2b), wobei der Innenkranz (2a) und der Außenkranz (2b) mit Stegen (9) verbunden sind, eine Kalibrierung sowie weitere Nachfolgeeinrichtungen.
Abstract:
Die Erfindung betrifft eine Vorrichtung zur Herstellung von Kunststoffroh- ren im Extrusionsverfahren mit einem Extruder (1), einem sich in Produk- tionsrichtung an den Extruder anschließenden Rohrkopf (2) bestehend aus einem Grundwerkstoff mit mindestens einem Dorn (7) und einer Hülse (8), wobeisich zwischen dem Dorn (7) und der Hülse (8) ein Schmelzeka- nal (17) bildet, dermindestens am Dornende (9) des Dornes (7) und am Hülsenende (10) der Hülse (8) in Produktionsrichtung (11) gesehen strö- mungsgünstig ausgebildetist,wobei der Dorn (7) und die Hülse (8) relativ zueinander vor und zurück verstellbar sind, wobei die Außenfläche des Dornes (12) und/oder die Innenfläche der Hülse (13) mindestens partiell aus einem Werkstoff besteht/bestehen der eine höhere Gleitfähigkeit auf- weist als der Grundwerkstoff. Erfindungsgemäß ist dabei vorgesehen, dass sich der Durchmesser des Dornes (7) am Dornende (9) konisch vergrößert oderverkleinert und/oder das Dornende (9) des Dornes (7) mit einer Rundung oder einem Radius versehen ist und sich dadurch der Durchmesser vergrößert oder verkleinert oder stetig ausläuftundsich der Innendurchmesser der Hülse (8) am Hül- senende (10) konisch vergrößert oder verkleinert oder stetig ausläuft und/oder das Hülsenende (10) der Hülse (8) mit einer Rundung oder einem Radius versehen ist und sich dadurch der Durchmesser vergrößert oder verkleinert, oderdass sich am Dorn-und Hülsenende zusätzlich zwei Flä- chenabschnitte (18, 19) erstrecken, die parallel und zylindrisch ausgeführt sind.
Abstract:
An extrusion die is provided with an external deckle assembly, an internal deckle assembly, or both. One embodiment provides an extrusion die having a wedge-actuated external deckle assembly. A seal member of the external deckle assembly moves to a sealed position in response to movement of the wedge in a first direction. Another embodiment provides an extrusion die with an internal deckle assembly having a deckle rod support system. The internal deckle assembly includes a deckle rod and a transversely elongated support engaged with the deckle rod to restrain the deckle rod against bending.