| 摘要 |
Plunger means for use in connection with an extrusion tool or the like comprises a displaceable auxiliary plunger portion longitudinally slidable along a recessed portion of the main plunger and normally biased to a first position wherein its first end extends forwardly of the first end or front end of the main plunger. When suitably contacted, the auxiliary plunger may be displaced rearwardly so that its front end is generally coincident with the front end of the main plunger. The resulting self-adjusting plunger assembly thus provides means for extruding differently sized connectors through a particularly sized orifice in an extrusion tool or the like. In operation, the auxiliary plunger portion precedes the main plunger into the extruding orifice when used in connection with the smaller connector, thereby selectively restricting the size of the orifice to that commensurate with the smaller connector. The larger sized connector will displace the auxiliary plunger portion rearwardly when contacted thereby so that both the main and auxiliary plunger portions operate to advance the connector through the extruding orifice. Biasing means which may comprise a compression spring or the like is provided to return the auxiliary plunger portion to its initial position after being displaced rearwardly along the main plunger recessed portion.
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