초록 ▼

A pre-plasticizing injection molding machine includes a plasticizing and flow regulating assembly connected to the tip of an injection chamber or shooting pot having an injection cylinder. A distributor valve allows the transfer of plastic resin into the shooting pot at low pressure and prevents the

A pre-plasticizing injection molding machine includes a plasticizing and flow regulating assembly connected to the tip of an injection chamber or shooting pot having an injection cylinder. A distributor valve allows the transfer of plastic resin into the shooting pot at low pressure and prevents the backward flow of resin to the plasticizing unit when the injection plunger injects the resin. A plurality of distribution channels in communication with either the distributor valve or a separate valve, and having outlets in the shooting pot angularly equispaced in proximity to the perimeter of the conical tip of the plunger uniformly distributes new resin behind resin retained in the shooting pot from the previous injection cycle, thereby obviating stagnation zones.

대표청구항 ▼

[ We claim:] [1.] A flow regulating and distributing assembly for controlling the flow of plastic material into an accumulator cavity of a barrel of an injection molding machine from a plasticizing chamber and for controlling the discharge of plastic material from the accumulator cavity to an inject

[ We claim:] [1.] A flow regulating and distributing assembly for controlling the flow of plastic material into an accumulator cavity of a barrel of an injection molding machine from a plasticizing chamber and for controlling the discharge of plastic material from the accumulator cavity to an injection nozzle, said injection molding machine having a shooting pot head with a conical seat connected to the barrel at the periphery of the conical seat, and said shooting pot head having a central injection channel coaxial with the conical seat communicating the accumulator cavity with the injection nozzle, said flow regulating and distributing assembly comprising:a first channel formed therein for connecting the shooting pot head injection channel with the injection nozzle and a second channel for connecting the plasticizing chamber with the shooting pot head, said second channel having a plurality of branch channels having outlets in the conical seat in proximity to the periphery of the conical seat operative to feed said plastic material to the shooting pot head in proximity to the shooting pot head periphery, and valve means operative to feed said plastic material to the shooting pot head through the second channel while closing the first channel and to discharge said plastic material from the shooting pot head to the injection nozzle through the first channel while closing the second channel.