Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1994-06-20
1996-11-26
Davis, Robert
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
29894331, 156154, 156161, 156182, 156250, 264258, 301 56, 301 58, B29C 5356
Patent
active
055781543
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention provides a method of manufacturing structural components for, for example, vehicles (in particular cycles, motor-cycles and cars) and other devices the components of which operate under compressive and/or extensive stress and/or successive repetitions of either or both types of stress. The best examples of this are wheels for such vehicles or components for attachment to an engine.
The method of the present invention may also be used for the manufacture of components that are not structural or where the structural nature of the component is not the only function of the component, eg. motor vehicle chassis.
BACKGROUND ART
One of the present problems with the manufacture of general structural components of the types outlined above is obtaining reasonable strength under stress and extension and repetitions thereof, at an appropriate weight, or at a weight which is acceptable for the component in question. Also, very light components can often be manufactured, but the cost is unacceptably high for the given application.
European patent 438792 discloses a method of making flexible beams and helicopter rotor blades and similar components. In this method, a composite material roving is wound in a figure of eight around a mandrel, the mandrel being rotated so that the roving forms a tubular mesh around the mandrel. Thus, the component is formed as a mesh made of overlapping rovings which are supported upon a mandrel during the forming process.
U.S. Pat. No. 3,367,586 and European patent 284497 disclose filament winding machines broadly similar to that disclosed in European patent 438792, in which a roving is wound in a substantially helical pattern around a mandrel.
European patent 213816 discloses the making of a tube or rod by wrapping a filamentary material impregnated with a matrix material in a first helical layer around a former, second and subsequent helical layers being built up around the inner layers, with each succeeding layer being at a different angle to the immediately preceding and immediately succeeding layers.
In all of the above prior art specifications, it is note worthy that the rovings or yarns or filaments which are used are always wrapped around a mandrel, so that the roving is fully supported during the forming process. Further, the articles that are formed by the above described prior art techniques are formed by a plurality of differently directed layers of windings i.e. the desired shape basically is outlined as a mesh of rovings.
In contrast, the method of the present invention permits the formation of relatively complex shapes without the use of mandrels and provides for the formation of components as solid plates or rods rather than mesh constructions. It follows that the method of the present invention is able to provide for the manufacture of structural components which are very light but exceptionally strong, by a method of manufacture which can readily be automated and which, compared to the prior art methods, is relatively simple and rapid to perform.
A further object of the invention is the provision of such structural components produced by this method. A still further object of the invention is the provision of apparatus for use in the above-described process to produce said structural components.
DISCLOSURE OF INVENTION
The present invention provides a method of manufacture of structural and other components, said method including: the spatial placement of said spools, relative to one another, required in the finished component; spatial placement; using said means; depending on the purpose to which the component is to be put, for all spools; from spool to spool on a predetermined path, said winding building up the said thickness of material to form unsupported rods of wetted yarn between spools; is under tension during said curing, the temperature of said curing being determined by the materials used and the intended use of the component; and curing is completed and each said rod is rigid.
As used herein, the term "yarn" means a pl
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