Method for fabricating and inserting reinforcing spikes in a 3-D

Details Method for fabricating and inserting reinforcing spikes in a 3-D Method for fabricating and inserting reinforcing spikes in a 3-D

1987-04-13

1989-08-08

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156175, 156425, B65H 5400

Patent

active

048549908

ABSTRACT:
Method and apparatus for fabricating reinforcing spikes for insertion in a preferential direction into a structure reinforced in three directions substantially orthogonal. The structure is substantially a body of revolution and the reinforcements are provided by filaments made of high-strength high-elasticity-modulus materials. Strands made with such continuous filaments are wound helically in two generally perpendicular directions along a surface substantially parallel to both the external and internal body surfaces of revolution. The distance between these two surfaces is variable and defines the body thickness which may reach an appreciable percentage of the body diameter at certain stations. The spikes are made of parallel fiber segments bonded by a resin matrix so as to be stiff, and have two pointed ends. The spikes are forced to partially penetrate the structure during the strand winding process along a direction substantially perpendicular to a plane tangent to the structure surface where the spike is to penetrate the yet uncompleted structure. Winding of additional strands subsequently takes place between embedded spikes. The fibers of the radially-oriented spikes then constitute the third-dimensional reinforcing mode of the structure.

REFERENCES:
patent: 3577294 (1971-05-01), David
patent: 4080915 (1978-03-01), Bompard et al.
patent: 4328272 (1982-05-01), Maistre
patent: 4366658 (1983-01-01), Maistre
patent: 4394203 (1983-07-01), Bompard et al.
patent: 4495231 (1985-01-01), Laskaris et al.

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