The so-called GAIM technology, is a gas assisted injection molding for short, is a new process of injection molding is abroad in twentieth Century 80 time end. It will melt quantitative injection mold cavity, the other by means of injection mold cavity in high pressure nitrogen gas nozzle, promote the melt filling mold cavity using the gas pressure, the expansion of high pressure gas to make plastic parts forming the air section required and in good shape. Thus, the GAIM technology is the hollow structure and injection molding process are combined, and its main characteristics:
  1.injection pressure. GAIM melt technology when injected into the mold cavity, the cavity volume is small, therefore the injection pressure is lower, which is normally injection molding injection pressure 10%-75%.
  2.can simplify the gating system. Using the technology of GAIM forming, the design of gating system in plastic parts, thereby simplifying the gating system, and can improve the filling state and temperature control of molten material, eliminating multiple feed fusion line possible.
  3.reduces the quantity of plastic. Due to the hollow structure, can save more than 50% of raw materials.
  4.to improve the surface quality. In the forming process of GAIM, the shrinkage can be compensated by the expansion of the gas, so the plastic surface and mould precision contact, won't appear sag.
  5.the warping deformation small. As the injection pressure is small, and all the internal cavity melt pressure, therefore, plastic parts in the pressure distribution more uniform, so the smaller residual stress, warping deformation is small.
  6.to improve the strength and stiffness. Using the technology of GAIM by gas as the holding pressure, pressure from the airway to melt, the pressure is much smaller than the conventional pressure, can reduce the clamping force 20%-90%.
  7.clamping force reduction. GAIM technology by gas as the holding pressure, pressure from the airway to melt, the pressure than normal pressure small, can reduce the clamping force 20%-90%.
  8.greatly reducing the cost of. Because the clamping force to reduce the mold design is simplified, the molding cycle is shortened greatly, make the plastic parts by 30%-50% GAIM technology to reduce the cost of production.
  9.can ensure the quality of large differences in wall thickness of plastic parts. Using GAIM technology to plastic parts wall thickness thinning "hollowing out" into the airway, so as to ensure the forming quality of large differences in wall thickness of plastic parts.
  10.can simplify some design. Products of GAIM technology in the design of larger freedom, so it can simplify the design of plastic parts, mold and molding easier to.