Method of an apparatus for chopping runners and sprues.

摘要

A runner structure (A) composed of a runner (a) and a sprue (b) is discharged from an injection molding machine into a chopping apparatus (10) having a first cutter mechanism (12) and a second cutter mechanism (13). The runner structure (A) is guided by a guide mechanism (11) in the chopping apparatus (10) toward the first and second cutter mechanisms (12,13). The sprue (b) is cut off from the runner (a) by the first cutter mechanism (12), and then the runner (a) and the sprue (b) are chopped by the second cutter mechanism (12). The first cutter mechanism (12) has a lower cutter (31) for stopping the runner structure (A) by engagement with the sprue (b), and an upper cutter (32) movable into coaction with the lower cutter (31) for cutting off the sprue (b). The second cutter mechanism (13) includes a feed roller (50) for feeding the runner (a) intermittently and a cutter (51) reciprocally movable for chopping the runner (a) on the feed roller (50). The chopped pieces are discharged through a hopper (79) and delivered into the injection molding machine for recycling.