Process for manufacturing toothed belts of elastomeric material

Details Process for manufacturing toothed belts of elastomeric material Process for manufacturing toothed belts of elastomeric material

1992-11-30

1995-06-06

Maki, Steven D.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156187, 1563041, 264145, 264152, 264296, B29D 2908

Patent

active

054219272

ABSTRACT:
In a process for manufacturing toothed belts of any length, a tubular sleeve comprising a layer of cords (1) and at least a layer of elastomeric material (2) is preformed in an autoclave without being vulcanized so as to produce, on the inner surface thereof, a plurality of grooves (5) spaced apart from one another according to a predetermined toothing pitch (P). The sleeve is helically cut to obtain a continuous strip (7) to be subsequently wrapped over two wrapping drums (8, 9) suitably spaced apart from each other depending on the circumferential extension to be given to the belt. The obtained annular element (10), when the wrapping has been completed, is trued up by means of the provided grooves, between a molding matrix (11) and opposite mould (12) and is submitted to a pressing step and simultaneous cross-linking of the elastomeric material (2) by closing said elastomeric material between the molding matrix (11) and opposite mold (12) according to stages in succession. Thus the complete formation of the teeth (3) on the inner side of the belt being worked occurs, as well as the firm bonding of the continuous loops (10a) formed by wrapping of the continuous strip (7).

REFERENCES:
patent: 2354062 (1944-07-01), Ritzert et al.
patent: 3250653 (1966-05-01), Geist et al.
patent: 3937094 (1976-02-01), Cicognani
patent: 4083838 (1978-04-01), Breher et al.
patent: 4395298 (1983-07-01), Wetzel et al.
patent: 4448621 (1984-05-01), Marsh et al.
patent: 4626232 (1986-12-01), Witt
patent: 4861403 (1989-08-01), Yoshimi et al.

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