During the injection molding process of AC Contactor Shell, precise control of mold temperature plays a key role in product quality. The following are several key points for mold temperature control.
First, the mold temperature setting needs to be based on the characteristics of the plastic raw materials. Different plastics have different glass transition temperatures and melting points. For commonly used engineering plastics such as nylon and polycarbonate, their melting ranges and crystallization characteristics are different. For example, when nylon materials are injected, the mold temperature should generally be controlled at 80-120°C, which can ensure that the nylon molecular chain has sufficient activity, so that the product has moderate crystallinity and obtains good mechanical properties such as strength and toughness. If the mold temperature is too low, nylon products may have problems such as poor surface gloss, high internal stress and easy cracking; if the temperature is too high, the molding cycle will be extended, and the product may have unstable dimensional shrinkage.
Secondly, the uniformity of temperature in various parts of the mold is crucial. The mold is usually composed of a dynamic mold and a static mold, and has a complex cavity structure inside. During the injection molding process, it is necessary to ensure that the temperature of each area of the mold is evenly distributed to avoid local overheating or overcooling. For example, in the corners of AC Contactor Shell, the junction of thin wall and thick wall, etc., where heat is easily accumulated or dissipated unevenly, the temperature can be adjusted by designing a reasonable cooling water channel layout and heating element distribution inside the mold. The use of conformal cooling water channel technology can make the cooling medium closer to the surface of the mold cavity, effectively take away the heat, ensure that the entire shell shrinks uniformly in all parts during the injection molding process, reduce warping deformation, and improve the dimensional accuracy and appearance quality of the product.
In addition, dynamic control of mold temperature is a key link in improving molding quality. During the injection molding cycle, the mold temperature is not constant. In the injection stage, a higher mold temperature helps the plastic melt to fill the mold, which can reduce the viscosity resistance of the melt, so that the melt can better fill the fine structure of the cavity and improve the molding integrity of the product. In the pressure holding cooling stage, it is necessary to quickly reduce the mold temperature to promote the rapid solidification of the plastic and shorten the molding cycle. Therefore, mold temperature control systems, such as oil temperature machines, water temperature machines and other equipment, can be used to accurately adjust the mold temperature according to different stages of the injection molding process, to achieve dynamic optimization control of mold temperature from injection to cooling, to improve production efficiency and ensure stable product quality.
Finally, mold temperature monitoring and feedback adjustment are indispensable. During the injection molding process, temperature sensors should be installed to monitor the temperature changes of various parts of the mold in real time. Once the temperature deviates from the set range, the control system should immediately make corrections according to the preset adjustment strategy. For example, if the mold temperature is too high, the flow rate of the cooling medium can be increased or its temperature can be lowered; if the temperature is too low, the heating power can be appropriately increased or the cooling can be reduced. Through this real-time monitoring and feedback adjustment mechanism, it is possible to effectively deal with the problem of unstable mold temperature caused by factors such as ambient temperature changes and equipment operation fluctuations, to ensure that the AC Contactor Shell injection molding process is always in the best temperature control state, and to continuously and stably produce high-quality products.
