Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung eines Rohres (4) durch Spritzgießen einer thermoplastischen Formmasse unter Verwendung einer Spritzgießvorrichtung (1) mit einer Artikelkavitat (3), die die Außenkontur des Rohres (4) definiert, mit einer Injektionsvorrichtung, die dazu ausgebildet ist, ein Profil (5) durch die mit der thermoplastischen Formmasse gefüllte Artikelkavitat (3) unter Verdrängung einer flüssigen Seele der Formmasse zu treiben, wobei das Verfahren vorsieht, eine Öffnung der Artikelkavitat (3) mit einem Formkern (7) zu verschließen, der mit der Artikelkavitat (3) einen Formhohlraum bildet und der eine mit der Formmasse befüllbare Nebenkavität aufweist. Nach dem Füllen der Artikelkavitat (3) und des Formhohlraums mit der thermoplastischen Formmasse wird ein Projektil durch die Artikelkavitat (3) getrieben, wobei das Projektil (5) die Formmasse in die Nebenkavität verdrängt. Anschließend wird der Formkern (7) mit der gefüllten Nebenkavität gezogen, wobei die verdrängte Formmasse von der das Rohr (4) bildenden Formmasse getrennt wird. Die Erfindung betrifft weiterhin eine Spritzgießvorrichtung zur Durchführung des Verfahrens (Figur 1).
Abstract:
Die Erfindung betrifft ein mehrlagiges Verbundmaterial (1) für die Herstellung von Kunststoffformteilen, einen Behälter aus einem solchen Verbundmaterial sowie ein Verfahren zur Herstellung des Behälters. Das Verbundmaterial umfasst eine erste strukturgebende selbsttragend steife Außenschicht (2) aus einem Faserverbundwerkstoff, eine zweite strukturgebende Außenschicht (3), eine erste Zwischenschicht (4) aus einem Barrierekunststoff und eine zweite reißfeste Zwischenschicht (5) aus einer dünnen reißfesten Folie sowie wenigstens eine Haftvermittlerschicht (6, 7, 8), wobei die Zwischenschichten (4, 5) und die Haftvermittlerschicht (6, 7, 8) zwischen den strukturgebenden Außenschichten (2, 3) eingebettet sind und mit den strukturgebenden Außenschichten (2, 3) einen Haftverbund bilden und wobei die strukturgebenden Außenschichten (2, 3) jeweils eine Dicke aufweisen, die ein Vielfaches der Dicke jeder der Zwischenschichten (4, 5) oder der Haftvermittlerschicht (6, 7, 8) beträgt.
Abstract:
Die vorliegende Erfindung offenbart eine Vorrichtung zur Erzeugung einer Verstärkungsstruktur (20), die ein faserverstärktes und thermoplastischen Kunststoff umfassendes Band (30) umfasst, auf einer Formkörperoberfläche (11). Die Vorrichtung ist dadurch gekennzeichnet, dass diese dazu ausgebildet ist, dass das Laserdioden-Array (110, 120) die Aufheizfläche (32) des Bandes (30) und/oder die Aufheizfläche (12) der Formkörperoberfläche (11) oder der bereits gebildeten Verstärkungsstruktur (20) direkt bestrahlt, wobei die Laserdioden (111) des Laserdioden-Arrays (110, 120) als Oberflächenemitter (111) ausgebildet sind.
Abstract:
The invention relates to a system for heating a storage container (1) for an aqueous operating liquid in a motor vehicle having a combustion engine cooled by means of a liquid heat transfer medium, using the waste heat from the combustion engine, which is transferred to the heat transfer medium. The system comprises a first heat exchanger (9), which is provided in or on the storage container (1) and can be heated by means of the heat transfer medium in a cooling circuit (3) for the combustion engine, wherein the first heat exchanger (9) is part of a storage container heating circuit (10), which comprises a heat transfer medium feed (11) and a heat transfer medium return (12), wherein the storage container heating circuit (10) is connected hydraulically in parallel with a second heating circuit (7b) with a second heat exchanger (7) for heating the passenger cell (8) of the motor vehicle. The storage container heating circuit (10) comprises a valve with a controllable volume flow and further comprises means for measuring the volume flow of heat transfer medium in the storage container heating circuit (10) and means for controlling the valve (13) in accordance with one or more temperature signals from various temperature sensors (Tl to T5). The invention furthermore relates to a method for heating a storage container (1) using the system.
Abstract:
The present invention describes a fastening system for fastening a heat-shielding and/or impact-protection plate (2) to an operating fluid container wall (1) with the following features: - the fastening system comprises a cylindrical receiving bolt (10) and a fastening element (12) with an internal thread (14); - the receiving bolt (10) is formed from a first plastic and/or comprises a first plastic at its outer circumference; - the fastening element (12) is formed from a second plastic and/or its internal thread (14) is formed from a second plastic; - a hardness of the second plastic is greater than a hardness of the first plastic; - the fastening element (12) can be screwed onto the receiving bolt (10); and - by screwing the fastening element ( 12 ) onto the receiving bolt ( 10), an external thread is formed on the outer circumference of the receiving bolt ( 10 ) by material displacement of the first plastic into gaps between the flanks (16) at the root (18) of the internal thread (14).
Abstract:
The invention relates to a method for producing a container from thermoplastic material having a connection element (5) passing through the wall thereof. The method comprises making available at least one plate-shaped or shell-shaped or tube-shaped preform (3) made of plasticized thermoplastic material, introducing the preform (3) into a multipart molding tool (1) having cavities defining at least one molding recess, molding and final shaping of the preform (3) within the molding tool (1) using differential pressure, piercing of the still warm-plastic preform (3) from the tool side by means of a mandrel (9) in order to produce an opening (6) in the preform (3), insertion from the molding recess side of a connection element (5) into the opening (6) produced by the mandrel (9), and connection of the connection element (5) to the preform (3).
Abstract:
The invention relates to a container (1) of thermoplastic material with at least one support (4), which is arranged in the interior of the container, extends between opposing container walls (2) and is anchored at each end to the container walls with a positive engagement and/or a material bond, the support (4) comprising at least one supporting strut (5) and the supporting strut (5) substantially absorbing a supporting load on the container walls (2) induced by negative pressure in the container, and a tensile force that is induced by positive pressure being absorbed by at least one tension-resistant bracing element in the form of a tension-resistant band (8) which extends between the container walls (2).
Abstract:
The invention relates to an annular die (1) on an extrusion head for producing tubular or sheet-like preforms with an arcuate die gap and with a melt channel (4) delimited by a mandrel (2) and a die body (3), the cross-sectional profile of the melt channel (4) being variable by way of adjusting elements, the annular die according to the invention being distinguished by the fact that the outer circumference of the melt channel (4) is at least partially delimited directly by at least one radially adjustable slide (5), that the slide (5) is formed by a number of segments that can be adjusted together from at least one first position into at least one second position, and that the segments in each position form a respectively closed arc portion of the delimitation of the melt channel (4), the radius of the arc portion being different according to the position of the segments.
Abstract:
The invention concerns a fluid container (1) for a motor vehicle, in particular a fuel tank. The fluid container (1) comprises at least one clamping strap (3) surrounding this to hold it at predefined fixing points of the bodywork (4) of a motor vehicle. The fluid container (1) according to the invention is characterised in that the clamping strap (3) is premounted captively on the fluid container (1) without additional fixing means.
Abstract:
Method of producing a composite pressure vessel (1) having an inner vessel (4) made of thermoplastic material, having at least one end piece (6) provided in a neck region (2), and having a wrapping (5) which reinforces the inner vessel (4) and is made of a fibre material, wherein the method includes production of the inner vessel (4) by extrusion blow moulding and the end piece (6), while the inner vessel is being shaped, is formed on the inner vessel such that the end piece (6) is at least partially enclosed by the inner vessel (4).