Description & Inquiry Injection GK (GAIM)
| 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. 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. The gassing of the cavity is only possible when the gas injection pressure is higher than the opposing pressure in the cavity. The gas injection pressure moves the pin which opens the injector completely, allowing for high volumes to be achieved. The back-gassing goes through cross-shaped surfaces on the sealing area of the pin. The gap is large enough to allow the gas to flow through, but small enough to prevent the melt from seeping in. Maintenance of the injector can be carried out simply and quickly when the mold is open. Advantages • Cycle time reduction • Contact force reduction • Increased part rigidity • Weight reduction • Remove part distortion • Improved surface quality • Eliminate sunken areas |
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