| 摘要 |
A method of inserting a slug of powdery depolarizer material into a can as a step in the manufacture of an electrical dry cell, comprises extruding the material along a passage by a ram, which over the first part of its stroke consolidates the material against the effect of a restriction in the passage and then injects the consolidated material through a nozzle into the container, so as to fill the can in a single stroke of operation, the bottom of the can starting close to the nozzle and then progressively moving away from it at a rate which is directly proportional to that of the ram, under positive control by a cam. The working end of the ram is preferably formed with a recess communicating with the outer surface of the ram by way of one or more bleed holes, which is or are closed just before extrusion starts, whereby a substantially constant volume of material is injected for each stroke of the ram, each bleed hole being in the form of a circumferentially extending slot of which the length can be adjusted by rotation of a slotted outer sleeve. The ram reciprocates in a vertical direction, and a reservoir for powdery material extends horizontally around the mouth of the compression, being fitted with a paddle for sweeping material into the mouth of a compression cylinder prior to each stroke of the ram. |
