Process and apparatus to identify the presence of structural cavities in sleeves for the manufacture of driving belts

摘要

A tubular sleeve (2) having a toothed inner surface (2a) is operatively mounted on rollers operable in rotation to move the sleeve transversely to the extension of the teeth (3). An ultrasonic emitting and receiving member (15) movable parallelly to the rollers detects the presence of structural cavities (3a) in the sleeve. An electronic processing unit carries out the identification and memorization of the position of the structural cavities (3a) on the longitudinal extension of the sleeve (2).