A MACHINE FOR PRODUCING A STRIP OF METAL-ALLOY OR PLASTICS GRATING FOR USE IN THE MANUFACTURE OF ACCUMULATOR PLATES

摘要

The machine comprises a multiple-step expansion die (8, Fig. 2) through which a continuous strip of lead alloy is fed intermittently and which includes a rectilinear matrix 11 and punch 14 tapered in the direction of advance of the strip and movable relative to each other. The punch 14 carries two lateral rows of toothed cutting blades 13 arranged to cooperate with two respective lateral rows of counterblades carried by the matrix and is moved towards the matrix 11 with a cam- actuated stroke synchronised with the advance of the strip. Each cutting blade 13 is provided with at least two contiguous teeth which are side by side in the direction of advance F of the strip, so as to make at least two cuts in the strip with each operating stroke of the punch 14.