Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With work feeding or handling means
Patent
1991-03-26
1993-10-05
Simmons, David A.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With work feeding or handling means
156285, 156382, 156245, 156538, B32B 3100
Patent
active
052501442
DESCRIPTION:
BRIEF SUMMARY
This invention concerns bonding apparatus and also concerns a method of bonding using the apparatus.
SUMMARY OF THE INVENTION
The apparatus and method are to be used in the bonding, using adhesive, of two annular facings of friction material each adhered to an opposite side of a carrier plate to form a friction facings and carrier plate assembly which can be used in the construction of a friction clutch driven plate. That driven plate can be of a type for use in a friction clutch interposed between an internal combustion engine and a change-speed gear box in a drive-line of a motor vehicle.
According to a first aspect of the invention there is provided a bonding apparatus comprising first and second platens mountable one over the other such that a first surface on one platen faces towards a first surface on the other platen, each said first surface having an annular recess therein such that when the platens are mounted one on top of the other said annular recesses substantially coincide and are substantially co-axial, each recess having a base with a substantially flat surface at the bottom of the recess, and each base having means therein opening to the recess and connectable with a source of vacuum to apply vacuum to the recess.
According to a second aspect of the invention there is provided a method of bonding a pair of annular friction facings to opposite sides of a carrier plate to form a friction facings and carrier plate assembly using the bonding apparatus according to the first aspect, said method comprising holding a respective annular friction facing flat against the base of the respective recess in each said platen by applying said vacuum in the course of a said carrier plate disposed between the two platens being bonded to the friction facings by adhesive interposed between each friction facing and the carrier plate.
BRIEF DESCRIPTION OF THE DRAWINGS
Each aspect of the invention will now be further described, by way of example, with reference to the accompanying drawings in which:
FIG. 1 is a plan view, partially fragmented, of a friction facings and carrier plate assembly which can be bonded using each aspect of the invention;
FIG. 2 is a section on line II--II in FIG. 1;
FIG. 3 shows, partly in section, an embodiment of a bonding apparatus formed according to the first aspect of the invention;
FIG. 4 shows a fragment of the apparatus in FIG. 3 but on a larger scale than in FIG. 3;
FIG. 5 shows the apparatus in FIG. 3 in the course of performance of the method according to the second aspect of the invention to produce a friction facings and carrier plate assembly similar to that in FIG. 1; and
FIG. 6 is a cross-sectional view of an alternative embodiment of a part of a bonding apparatus according to the first aspect of the invention.
DETAILED DESCRIPTION OF THE INVENTION
Referring firstly to FIGS. 1 and 2, a friction facings and carrier plate assembly 2 comprises an annular carrier plate 4 of, for example metal, substantially centred on axis X and having a plurality of resiliently pliable, radial blades or paddles 6 at its outer periphery. The paddles 6 are spaced one from another by radial slots 8. Two friction facings 10,12, each formed by a pliable, integral annulus of friction material, are bonded to opposite sides of the paddles by respective layers 14,14' of adhesive. The adhesive can be an elastomer, for example a room temperature vulcanizable silicone rubber. Each elastomer layer 14,14' is formed by a plurality of radially spaced bead portions of the elastomer. For example the elastomer layer 14 is formed by a plurality of elastomer beads 14A,14B,14C,14D and 14E arranged as radially spaced, substantially concentric circles centred on the axis X. The layer 14' is also formed, for example, of elastomer beads in the form of concentric circles. As can be seen in FIG. 2 the beads of the layer 14 are each disposed opposite to the radial space between each pair of adjacent beads of elastomer in the layer 14'. Alternatively, each layer 14 or 14' can be formed by a bead of elastomer i
REFERENCES:
patent: 2483234 (1949-09-01), Roberts
patent: 3752726 (1973-08-01), Barefoot
patent: 3793115 (1974-02-01), Jindra
patent: 4908087 (1990-03-01), Murooka et al.
Bolton John S.
Cooke Richard C. M.
Fitzpatrick-Ellis John F.
Automotive Products plc
Engel, Jr. James J.
Simmons David A.
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