Method of winding on foam mandrel

Details Method of winding on foam mandrel Method of winding on foam mandrel

1983-08-04

1985-06-25

Ball, Michael

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156172, 156173, 156211, B65H 8100

Patent

active

045252289

ABSTRACT:
A mandrel is provided for use on a filament winding machine in a process for making a fibre-reinforced plastic artifact. The mandrel 50 comprises a portion 66 of relatively low density cellular material such as foamed polyurethane about a stiff axial spine member 54. The mandrel 50 is therefore relatively light weight and yet is of sufficient rigidity for use on a filament winding machine. After formation of an artifact by winding on the mandrel 50, the mandrel 50 may be removed from inside the artifact by comminution.
An alternative mandrel comprises a number of sections of the cellular material, and enables an artifact having a re-entrant surface to be formed by a filament winding process. A layer of resin-impregnated filaments is wound around the mandrel, and the layer is partially cured. A section of the mandrel is then removed by comminution, and the layer is deformed to the shape of the remainder of the mandrel.

REFERENCES:
patent: 3551237 (1970-12-01), Cox et al.
patent: 3567541 (1971-03-01), Kacersenski
patent: 3850722 (1974-11-01), Kreft
patent: 3873654 (1975-03-01), Smith
patent: 3943020 (1976-03-01), Ashton et al.
patent: 4123307 (1978-10-01), Lemelson

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