2.2.3 Side gate

The side gate is also called the edge gate, which is generally opened on the parting surface and feeds from the outer side of the cavity (plastic part). The side gate is a typical rectangular cross-section gate, which can easily adjust the shear rate and gate closing time during mold filling, so it is also called a standard gate. The side gate is characterized by simple gate cross-section shape, convenient processing, and precise processing of gate size; flexible gate position selection to improve mold filling conditions; correction can be made without removing the mold from the injection molding machine; Convenient mouth and small traces. The side gate is especially suitable for two-plate multi-cavity molds. However, plastic parts are prone to defects such as weld marks, keyholes, depressions, etc., large injection pressure loss, and poor exhaust for shell-shaped plastic parts.

2.2.4 Overlapping gate
Overlapping gates are also called overlap gates, which are basically the same as side gates, but the gate is not on the side of the cavity, but on one side of the cavity. It is a typical impact gate, which can effectively prevent the jet flow of plastic melt. If the forming conditions are improper, surface pits will be generated at the gate. It is more difficult to remove the gate, which will leave obvious gate marks on the surface of the plastic part.