Design process and production control of injection molds for hollow blow molding machines

Most hollow blow molding machine injection molds are designed with several independent cooling zones. The neck and bottom require the most heat to be dissipated, and cooling plays a challenging and crucial role in the design of injection molds for hollow blow molding machines. Drilled cooling pipelines are installed in the areas that require cooling the most. In order to achieve better production control. Therefore, the most effective cooling is required.

Therefore, the mold cavity is usually cut by machine. Copper alloy injection molds also have high heat transfer and good corrosion resistance. However, the materials for producing injection molds must have high thermal conductivity and sufficient cutting edge strength. Currently, aluminum 70 75 is a high-grade alloy used in the production of most injection molds.

Due to the good machining performance of this metal. Its cost is high, its price is expensive, and due to its weight being three times that of aluminum, it may experience severe wear and tear on forming machinery. Steel alloy injection molds are easy to repair using welding or inlay methods.

Because the strength and hardness of cast aluminum cannot meet the requirements of the cutting edge. The thermal conductivity of aluminum injection molds is worse than that of cutting aluminum injection molds. The cutting edge of the mold cavity usually needs to be inlaid with broken copper alloy or stainless steel.

The operation hole and shoulder area are embedded with copper alloy or stainless steel. The bottom and neck are also inlaid with these two types of metals. Casting injection molds can also be made of cast copper alloy. Casting the steel mold cavity is relatively easy, and Kirk alloy (zinc) castings can be made on the steel master mold. The mold cavity and bottom plate are poured into a predetermined size. Due to the lack of strength in Kirk alloy to cut plastic. Because it relies on pressure or gravity casting. These cavities have many fine components produced by steel master molds or ceramic injection molds.