The car dashboard is an important component of the car interior, which integrates safety, comfort, and decoration. Generally, car dashboards are formed by injection molding using injection molds. When designing and manufacturing injection molds for automotive dashboard, it is necessary to analyze the product structure and mold structure.

There are many installation structures for automotive dashboard plastic parts with high dimensional accuracy. The buckle area needs to be designed with adhesive reduction grooves to prevent the appearance of the plastic parts from shrinking. The appearance surface should not have spots, gate marks, shrinkage dents, fusion marks, flash marks, and other defects.

According to the structural characteristics and appearance requirements of automotive dashboard plastic parts, the injection mold adopts a hot runner pouring system. Due to the large size and complex shape of automotive dashboard plastic parts, as well as the large height drop difference of the injection mold parting surface, it will make melt filling more difficult.

Based on the structural characteristics, material characteristics, surface quality, and batch characteristics of plastic parts in automotive dashboard, it has been decided to adopt a hot runner 2-point sequential valve hot runner bonding method. This not only improves the fluidity of molten plastic in the injection molding process, but also improves the filling effect of plastic parts, saves solidification materials in the flow channel system after injection molding, and improves the forming cycle of plastic parts, Improved the production efficiency of plastic parts. Due to the large height difference and numerous muscles in the plastic parts of the automotive dashboard, in order to prevent difficulties in filling the dynamic mold mesh area and vacuum adsorption, the top pins of the plastic mesh area were reasonably configured, and the gap between the top pins and the dynamic mold was used to exhaust gas, solving the problems of forming and demolding in the dynamic mold mesh area.