Despite this, mold designers are still working to improve the cooling efficiency of the cooling system. Different types of water channels, such as spiral type, baffle point cooling type and screw plug type, are proposed to achieve uniform and effective cooling of the front and rear molds. However, the above methods are not completely effective when designing molds for products with complicated structures and high quality requirements. In order to solve this problem, conformal cooling technology came into being.
Conformal cooling means that the cooling water path changes as the geometry of the cavity surface changes. The emergence of built-in conformal cooling waterway mold manufacturing technology not only provides mold designers with a larger mold design space, but also simplifies the design method of cooling waterways.
It is well known that in a typical injection molding process, it takes a certain period of time for the mold to reach a stable production state, because when the molten plastic is injected into the mold, heat transfer between the injection mold and the molten plastic occurs at the contact surface, and The mold conducts heat pulse conduction to the cooling water passage by itself.
As a result, the mold temperature rises while transferring heat to the coolant. If the cooling water path is a long distance from the surface of the mold, a continuous heat pulse will continue to raise the temperature of the mold until the pulsed heat carried by the cooling system and the pulsed heat of the molten plastic to the mold are balanced. If the cooling water path is closer to the surface of the mold, the heat accumulated in the mold is greatly reduced, and the heat is confined to the area between the cooling water channel and the mold surface, so that the path for transferring heat from the surface of the mold cavity to the cooling water path is also shortened. a lot of. In this way, the mold can reach a stable working state in one injection cycle.