Method of forming an article including reinforcing elements enca

Details Method of forming an article including reinforcing elements enca Method of forming an article including reinforcing elements enca

1975-01-14

1977-05-03

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264274, 264278, 425388, B29C 1704, B29D 302

Patent

active

040215180

ABSTRACT:
A method of forming a two-dimensional array of reinforcement elements completely encapsulated in a thermoplastic material. The reinforcement array is supported above a vacuum forming table on a plurality of pegs moveable upwards from the surface of the table, a sheet of hot thermoplastic material is positioned over the reinforcement array, and a vacuum is applied through the table to draw the thermoplastic material down and around underneath the reinforcement. The pegs are then retracted to a position substantially flush with the surface of the table once the thermoplastic material is capable of supporting the reinforcement, the vacuum then drawing the thermoplastic material around and underneath the reinforcement and to those parts of the reinforcement above the pegs. The thermoplastic material is then allowed to cool and set.

REFERENCES:
patent: 2361348 (1944-10-01), Dickson et al.
patent: 3238287 (1966-03-01), Chapman
patent: 3875280 (1975-04-01), Story

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