INJECTION DEVICE OF INJECTION MOLDING MACHINE

摘要

Provided is an injection device for an injection molder. The injection device comprises: a pump; a screw moved forward and backward or rotated by oil supplied from the pump; a release pipe guiding the oil so that the oil used for driving the screw can be released to a drain part. The release pipe further includes: a relief pipe on which a relief valve is installed so as to apply resistance pressure to the screw when the screw moves backward; and a bypass pipe which is coupled to the relief pipe in parallel and on which a bypass valve is installed so as to determine whether the oil should flow along the relief pipe.