Gas injector GK

Gas injection technology With gas injection technology, gas is injected into the plastic melt usually at the end of the injection process. The injected gas displaces the melt depending on the injector’s location. Short shot, cavity is partially filled with plastic melt. The plastic melt is pressed against the mold wall with the injected fluid. Full shot, entire cavity is filled with plastic melt. The injected fluid forces the melt into an adjoining cavity. Full shot back pressure procedure, entire cavity is filled with plastic melt. The injected fluid forces the melt through the sprue bushing back into cylinder vestibule. Advantages  Cycle time reduction  Contact force reduction  Increased part rigidity  Weight reduction  Remove part distortion  Improved surface quality  Eliminate sunken areas Applications: In the mold, directly at the cavity Characteristics:  Conical sealing injector based on the non-return / check valve principle  With or without back-gassing  Gassing with maximum flow rate One or more injectors are installed directly in the mold, depending on the size and geometry of the molded part as well as the viscosity of the melt. The regulated gas, usually nitrogen, is fed through bores in the mold to the injector and through this into the molded part. The back-gassing or gas pressure release goes through the same injector (type GKR) back to the gas feed.