What are the runner types of plastic auto parts molds- Ningbo Hongchengyu Mold Technology Co., Ltd.

The runner type of the plastic auto parts mold is the path for the plastic material to flow during the injection molding process, which directly affects the filling uniformity, molding time and final quality of the parts.

Linear runners: Linear runners are a simple and straightforward design that guides plastic material from the injection machine to the mold cavity. This runner type is suitable for components with simpler shapes, especially those with straight edges that do not require complex filling. The advantages of linear flow channels are simple structure and low manufacturing cost, but the filling uniformity and cooling effect may be relatively inferior to other flow channel types.

Annular runner: The annular runner guides the plastic material from the injection machine to the mold cavity, and its flow path is annular. This type of flow channel is suitable for parts that have higher requirements for filling uniformity. The annular flow channel can reduce the pressure loss of plastic during the flow process, improve the filling uniformity, and contribute to the uniform distribution of temperature, which is beneficial to reducing the molding cycle.

Lattice runner: Lattice runner guides the plastic material into the mold cavity by providing multiple small holes or channels in the mold. This design is often used in the production of large parts. It guides plastic materials evenly through multiple small channels, reducing flow resistance and improving filling uniformity. The design of the lattice flow channel is relatively flexible and can be adjusted according to the shape and size of the parts.

Auxiliary runner: The auxiliary runner is a design that sets an auxiliary branch on the main flow channel. These branches can help distribute the plastic material evenly, reduce flow resistance and improve filling uniformity. The setting of auxiliary flow channels usually takes into account the shape complexity of the parts to ensure that plastic can fill every part.

Sub-runner: Sub-runner is a design in which multiple parallel small channels are set up on the main channel. This design is usually used for large parts, and can effectively guide plastic materials evenly, reduce pressure loss, and improve filling uniformity. The setting of sub-runners needs to take into account the structure of the mold and the filling requirements of the parts.

Multi-cavity mold runners: Multi-cavity molds include multiple identical or different mold cavities, each with its own runner system. This design can produce multiple parts at the same time, improving production efficiency. The runner design of multi-cavity molds needs to consider the filling uniformity of each mold cavity to ensure consistent quality of each component.