The gating system refers to the plastic melt flow channel from the injection machine nozzle to the mold cavity so far in the.
  1.the effect of pouring system. The gating system is the role of the various parts of the plastic melt smoothly filled cavity, and the filling pressure, the injection pressure delivered to the various parts of the cavity, in order to obtain the contour clear, internal quality of plastic products.
  2.Composed of gating system. The gating system with the type of injection molding machine is different and somewhat difference, but basically consists of four parts: the mainstream is the runner, and the gate, cold material well. The main road, it is the shunt connection nozzle and injection molding machine of a passage and a nozzle injection molding machine, usually on an axis, a circular cross section, and with a certain taper, the melt in the main channel does not change the direction; the runner, it refers to the main road into the cavity of each cavity channel, which is between the mainstream way to gate access. The general opening in the sub type surface; the gate, it is from the shunt end to the mold cavity has a fine short channel, is pouring system section the smallest and shortest part; cold well, moving die it is located within the main road on the opposite side of the shunt, or at the end of.
  3.Design principle gating system. Plastic product quality is good or bad, the relationship with the design of gating system is very large, therefore, need to pay attention to the design of gating system, generally speaking, the design of gating system must pay attention to the following principles. Must ensure that the melt melt filling process is faster and less disturbance, and create good conditions for exhaust; meet the forming properties of plastics, to design the gating system according to the different forming characteristics of all kinds of plastic; the melt flow resistance is reduced, should try to avoid the melt front impact of small diameter cores and fragile metal block a; multi cavity mold, should make the volume of each cavity not to differ too much, otherwise it is difficult to guarantee the product quality; to consider the removal, repair material inlet is convenient, at the same time or to affect the product the appearance; according to the product size, shape, wall thickness, technical requirements and other factors, a comprehensive selection the parting surface, gating system, taking into account the form feed port number; the position and shape of the discharge port, should be combined with the shape of plastic parts and technical requirements are determined; in mass production, to guarantee the quality of the premise as far as possible to shorten the process, shorten the molding cycle; cold material not nozzle end into the cavity, in the pouring system should consider storing the cold material position.