2.2.8 Ring gate
The annular gate is arranged on the outside concentric with the cylindrical cavity, that is, gates are arranged around the cavity, so it can be called an outer annular gate, and its gate position corresponds exactly to the inner disc gate . Suitable for thin-walled and long-tube plastic parts. Because the melt of the plastic part evenly enters the cavity around the core, the mold is filled evenly, the exhaust effect is good, and the plastic part has no welding marks. However, it is difficult to remove the gate and leave obvious gate marks on the outside of the plastic part. Ring gates are mostly used in small, multi-cavity molds.

2.2.9 Spoke gate and claw gate

The scope of application of spoke gate is similar to disc gate, and plastic parts with rectangular inner holes are also suitable. It changes the entire peripheral feed into a few small arcs or straight feeds, so it can be regarded as the inside Gate, this kind of gate is easy to cut, the runner is less aggregated, the upper part of the core is positioned, and the stability of the core is increased, but the weld mark on the plastic part affects the strength and appearance quality of the plastic part.
The claw gate is a variant form of the spoke gate, and a runner is opened on the tapered section of the core. Mainly used for long tubular plastic parts with small inner holes or plastic parts with high coaxiality requirements.