Process for the manufacture of sections of thermoplastic resin reinforced with continuous fibres

Process for the manufacture of sections of thermoplastic resin reinforced with continuous fibres

powdered metal particles bonded together with a suitable binder is placed against an anvil. At least one layer of fibres is placed on this layer and a...

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powdered metal particles bonded together with a suitable binder is placed against an anvil. At least one layer of fibres is placed on this layer and a second powdered metal layer is laid on the fibre layer and an explosive charge is laid against this. The explosive is detonated to join the layers together and the resultant structure is sintered at a temperature below the reaction temperature of the metal and the fibres. Process for manufacturing a composite panel for shock absorption Ando, Y., Ishige, Y., Kinugasa, T. and Sato, S. (Honda Giken Kabushiki Kaisha, Tokyo, Japan) US Pat 4 882 002 (21 November 1989) The process comprises applying to a surface of a polyolefin member a polyester hot-melting bonding agent which is hardened by adding an isocyanate cross-linking agent. A crosslinking type hot-melting bonding agent is applied to one surface of a laminating member and the two treated surfaces are placed in contact and bonded together by the application of pressure. Moulding of fibre reinforced plastic articles Radvan, B. and Willis, A.J. (Wiggins Teapc Group Limited, Basingstoke, UK) US Pat 4 882 114 (21 November 1989) A foamed aqueous dispersion consisting of 20-60 weight % single discrete fibres 7-50 mm long with a Young’s modulus > 10 GPa and 40-80 weight % of an unconsolidated particulate plastic selected from the group consisting of a thermoplastic and a thermosetting material with a particle size < I .5 mm is formed. This is laid down and drained on a forminous support to form a web which is transferred to an oven where it is heated first to remove residual moisture and then to bond the fibrous and plastics components together in such a fashion that the particulate form of the plastics is substantially maintained. The resultant sheet is passed through heated air to a temperature at which the viscosity of the thermoplastic component is sufficiently low to permit moulding; the sheet is then transferred to a compression mould and subjected to a predetermined pressure to produce the shaped composite article.

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Process for producing preformed wire from silicon carbide fibre-reinforced alumiminium Ishikawa, T., Tokutomi, K. and Imai, Y. (Director General Agency of Industrial Science and Technology, Japan) US Pat 4 877 643 (31 October 1989) A bundle of silicon carbide fibres is spread and then impregnated by continuous dipping for 60 seconds or less in a melt of eutectic alloy consisting of aluminium and 5-7 weight % nickel which is kept at or below the liquidus temperature of melting point thereof plus 50°C. Robot system for forming a structural component of a preimpregnated fibre reinforced tape Lengen, W., Oberfranz, R. and Puritz, W. (Messerschmitt-Boelkow-Blohm GmbH, Munich, Germany) US Pat 4 882 007 (21 November 1989) A robot system for dispensing and laminating a preimpregnated tape onto a structural component. The robot carries a tape supply roller and a means for advancing and cutting said tape and has a cantilevered arm with a free end that is tiltable about a plurality of axes. Method and apparatus for moulding fibre reinforced resin matrix composite material Megarry, T.J. (Short Brothers PLC, Belfast, UK)USPat4882118(2INovember1989) A tooling with a base member having a moulding face corresponding to the desired shape of a face of the finished article on which layer of prepreg are placed. Prior to arranging these layers at least 2 periphery elements are secured to the moulding face of the tooling. These (I ) define a mould cavity that is predetermined to establish an expanded desired finished shape and (2) give the edge profile of the finished article. At least one of these periphery slides on the moulding face during the curing cycle of heating to at least 177°C and subsequent cooling in response to differential thermal expansion and contraction without exerting significant compressive forces on the edges of the article.

Method for laying a sheet of material on a surface Breakspear,C.J. (Westland Group plc, UK) US Pat 4 875 962 (24 October 1989) A method of laying a sheet of prepreg onto a moulding surface is described. The material is picked up with the flexible diaphragm of an inflatable transfer tool. The transfer tool is located so that the sheet is in contact with the moulding surface with the diaphragm deflated; the diaphragm is inflated thus applying a uniform pressure to force the sheet into contact with the moulding surface. The tool is removed with the diaphragm still inflated; the diaphragm will stretch and is peeled off the prepreg sheet gradually.

Forming a laminate by applying pressure to remove excess sealing liquid between facing surfaces laminations Schoen, J.W. (Armco Advanced Materials Corporation, Lydora, PA, USA) US Pat 4 882 823 (28 November 1989) A method of forming a laminate of at least two laminations: a liquid with a viscosity <8 x IO-’ kg m-’ s-’ at 24°C is applied to the facing surface of each lamination and the surfaces are brought into contact whilst pressure is applied to remove excess liquid. The air between the surfaces is thereby displaced and the liquid provides a seal to prevent re-entry of the air.

Method and apparatus for blind tufting composite laminated joints Marrache, A.A. and Snipes, F.C. (Lockheed Corporation, Calabasa, CA, USA) US Patent 4 876 973 (31 October 1989) A self-threading stitching device for joining uncured composite laminates is described. This consists of a vertical reciprocating self-threading needle which pulls the thread through the laminate on the downstroke and releases it on the upstroke such that a thread loop is left projecting from the opposite side

Method of manufacturing discrete fibre reinforced, plastic tube and apparatus therefore Dealy, J.M., Charrier, J.-M. and Doshi, S. (Canadian Patents and Development Limited, Ottawa, Canada) US Pat 4 883 622 (28 November 1989) A first plastic material is introduced into the upstream portion of an annular die channel to form the inner layer of the tube. A second plastic material filled with discrete fibres is introduced into the upstream portion around the whole of the inner layer. A third plastic


material is introduced into the upstream portion round the whole of the intermediate layer so as to form an outer layer. The materials are co-extruded through the downstream portion which is divergent diametrically in the downstream direction so that the fibres end up orientated in generally the same direction throughout the intermediate layer. Method and apparatus for manufacturing blanks of semi-finished products Spaay, A.J. (Matec Holding AG, Kusnacht, Switzerland) US Pat 4 883 624 (28 November 1989) A process for manufacturing products from a fibre reinforced thermosetting synthetic resin compound and fibre mats which are stamped out to have an area and shape corresponding to that of the final product. The resin compound has no wrapping and a sufficiently high viscosity that no impregnation of a glass fibre mat will occur at ambient temperature. It is produced using a pair of rollers rotating in opposite directions which receive the resin and fibre components. The resulting mixture is passed to a vibrating hopper from where it is batched into batches of predetermined weight and density. Each resin batch is transported onto a libre mat and the two are moulded together by the application of heat and pressure. Process for the manufacture of sections of thermoplastic resin reinforced with continuous fibres Glemet, M. and Cognet, G. (Societe Atochem, Puteaux, France) US Pat 4 883 625 (28 November 1989) Continuous rovings are coated by with thermoplastic resin after they have been expanded to form a sheet of fibres by being passed through at least one baffle of a first baffle zone. The coated fibres sheet is passed through an impregnation zone which-has a channel with at least two channels opposite to, and parallel with, each other to force the resin to penetrate between the fibres. The baffles in the impregnation zone are parallel to at least one baffle in the first baffle zone. Method for surface bonding of ceramic bodies Newkirk. M.S.. Kantner, R.C. and Park, E.S. (Lanxide Technology Company, LP, Newark, DE, USA) US Pat 4 884 737 (5 December 1989) Two ceramic bodies are placed adjacent to each other with a bonding zone between them. A precursor metal is placed relative to this zone and the assembly is heated to a temperature above the melting point of the metal but below that of the ceramic bodies. The molten metal is progressively drawn into the bonding zone where it reacts with an oxidant to produce bond between the two ceramic bodies. Method and apparatus for pumping highconsistencv fibre suspension Niskanen; T. (A. - Ahlstrom Corporation, Noormarkku. Finland) US Pat 4 884 943 (5 December I989) An apparatus for pumping high-consistency fibre suspension consisting of a centrifugal pump and an impeller located in a housing with an inlet and an outlet. A rotor is located in the inlet which receives the fibres suspension from a feeder. In addition there is a means for withdrawing a portion of the suspension from the inlet and returning it to the feeder.




2 1991