Due to the distinctive particularity of plastic parts of complex automobile parts, the following factors need to be fully considered in the design of injection molding, such as drying treatment of materials, new requirements of glass fiber reinforced materials for screws, driving form and clamping structure. Firstly, when the commonly used resin materials such as automobile bumper and instrument panel are modified resins such as modified PP and modified ABS, the resin materials have different hygroscopicity. In order to meet the water content requirements during molding (General requirements ≤ 0.2%), the resin raw materials must be subject to hot air drying or dehumidification drying before entering the screw pre molding measurement of the injection molding machine.

EDM is an important process in mold manufacturing, especially in injection mold manufacturing. However, some misunderstandings in EDM in die and mould factories often lead to the failure of machining accuracy, surface and efficiency to meet the requirements. The following will analyze the common misunderstandings of EDM in mold factory.