Injection phase
• 70% ± 20% of the volume of the cavity is dosed and injected
• According to process, the gas injection occurs via machine nozzle, injector modules in the sprue or in the molded piece
Gas injection phase
• This begins shortly before the termination of the injection phase, in order to avoid switchover markings
• Gas fills the cavity and drives the melt front forward
• Targeted hollow spaces form in the molded piece
Gas hold-pressure phase
• The gas pressure is retained after the completefilling of the cavity, until the moldedpiece is stable
• Relief of the gas pressure after solidifying of the melt