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    Inflatable Tool for use in Adhesive Bonding
    11.
    发明专利
    Inflatable Tool for use in Adhesive Bonding 未知

    公开(公告)号：GB1153010A

    公开(公告)日：1969-05-21

    申请号：GB3807066

    申请日：1966-08-24

    Applicant: PARSONS CORP

    Inventor： BROWNLEE WINSTON E ,  RITCHEY JACK L

    IPC: B29C43/36 ,  B29C63/16 ,  B29C65/00 ,  B29D22/02 ,  B29D24/00 ,  B29D99/00

    Abstract: 1,153,010. Inflatable pressure-applying tool. PARSONS CORP. 24 Aug., 1966, No. 38070/66. Heading B5N. An inflatable tool, for use in applying pressure to a precisely demarked surface area during adhesive bonding, comprises a rigid planar template 15, Fig. 2, defining a pattern corresponding to the precisely demarked surface area, and a flat-sided pressure bag 11, 12, 13, enclosing the template and formed of flexible material which is impervious to air and which does not elongate when distended by air pressure, the bag having a pressure-applying side and a pressure-resisting side meeting at bag edges closely outward of the edges of the template, whereby, as the bag is distended from flatness by inflation the template makes pattern retaining contact with the bag edges, thus preventing shifting of the bag. As described the bag and template are of ladder-like, form and the tool is used in bonding a closing skin d, Fig. 8, of an aerofoil to the spurs e, i, and ribs thereof, the template corresponding to. the positions of the spurs and ribs so that pressure is applied over those areas only, the aerofoil parts and inflatable tool being inserted between the two halves m, n, of a mould during bonding during which bonding heat may be applied. In one embodiment the tool is produced by folding sheets 11, 12, 13 of glass fibre coated and impregnated with uncured tacky rubber about the template 15 and vulcanizing by applying heat and pressure. The template 15 is. of aluminium and is enclosed by pattern films 17, 18 of P.T.F.E. One face of each film 17, 18 is etched with acid to render it adherent to the template and to the other film at portions 19 while the other face of each film is non-adherent to the sheet 11. In a second embodiment only one pattern film is present and the template 15 and the edges of this film are adhered to the sheet 11.

    Apparatus for applying bonding pressure of differing magnitudes to adjacent surfaces of a workpiece
    12.
    发明专利
    Apparatus for applying bonding pressure of differing magnitudes to adjacent surfaces of a workpiece 未知

    公开(公告)号：GB1120922A

    公开(公告)日：1968-07-24

    申请号：GB60467

    申请日：1967-01-04

    Applicant: PARSONS CORP

    Inventor： BROWNLEE WINSTON E ,  RITCHEY JACK L ,  STEED STANLEY

    IPC: B32B27/00 ,  B64C27/473

    Abstract: 1,120,922. Jointing. PARSONS CORP. 4 Jan., 1967, No. 604/67. Heading B3V. [Also in Division B5] An inflatable pressure applying tool comprises a first inflatable pressure bag 22 which dilates on inflation and deflates to flatness and has a pressure applying side 26 and pressure resisting side meeting at edges which delimit a first pressure area, and second smaller similar inflatable bags 34 adhered to specific areas of the first bag on a surface other than the pressure applying side 26. The bags are provided with fluid pressure inlets. They are constructed from rubber impregnated glass fibre layers laminated together and the extent of the bags is defined by patterns 32, 36 of polytetrafluroethylene adhered to one side of the bags and around the edges of which a glass fibre material is folded. Adherance of one surface of the pattern to the bags is achieved by etching the surface to be adhered followed by vulcanization. The tools are used for bonding a skin e to the surface of a helicopter propeller. High pressure is required to bond the skin to the metal parts b and c of the propeller. This pressure is applied by small bags 34. A smaller pressure, applied by the large bag 22, is required to bond the skin to the part b which is of plastics foam.

    Improvements in flat-formed inflatable pressure bags
    17.
    发明专利
    Improvements in flat-formed inflatable pressure bags 未知

    公开(公告)号：GB1125532A

    公开(公告)日：1968-08-28

    申请号：GB60567

    申请日：1967-01-04

    Applicant: PARSONS CORP

    Inventor： BROWNLEE WINSTON E ,  RITCHEY JACK L

    IPC: B29C33/76

    Abstract: 1,125,532. Laminates. PARSONS CORP. 4 Jan., 1967, No. 605/67. Heading B5N. A pressure bag for applying pressure to workpieces for adhesive bonding comprises a flat-sided distensible hollow body made of rubber impregnated woven glass fibre laminates 15, 28, 30 having butt joints 26, 29 and 31 alternately at the opposite flat sides and an inflation inlet 24 into the body. The body has a flexible flat pattern 10 within the innermost laminate of a size corresponding to the inner size of the bag when flattened and the bag is formed by folding the fibre laminates around the pattern and vulcanizing. The pattern has one surface adhered to the innermost laminate and an opposite surface non-adherent on vulcanization, whereby to permit vulcanizing while flattened and thereafter to provide a cavity for inflation. Vulcanization, with or without heat, preferably takes place under partial vacuum to draw off any gases liberated. The bag may be used in combination with a mould, Figs. 9, 10 (not shown). The mould has a wall having a contour to which workpieces are to be worked. A flat-bottomed groove is provided in the mould wall of sufficient length to receive the pressure bag and whose width and depth correspond to those of the pressure bag when flattened. When the bag is dilated on inflation, the outer surface of its side opposite that presented against the bottom of the groove projects resiliently beyond the contour mould wall to take up any tolerances of the workpieces to which pressure is being applied. The rubber used may be a silicone rubber and the pattern may comprise a sheet of polytetrafluoroethylene, etched on the side to be adhered to the rubber impregnated fabric. The pattern may be adhered to a metal pressure pattern, e.g. of aluminium, Figs. 11-14 (not shown ).

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