Water inlet elbow mold for water pipe elbows is a specialized core process equipment used for mass production of plastic water pipe elbows. Its essence lies in the precise and controlled filling and cooling of molten material to form structural components that meet the requirements of fluid dynamics and sealing in one go. This mold integrates material engineering, fluid mechanics and precision manufacturing. Its technical focus has shifted from simple "shaping" to the in-depth regulation of the intrinsic quality and long-term service performance of the products. 
The core contradiction in mold design lies in the unification of ensuring forming quality and enhancing production efficiency. To address this, modern advanced molds generally adopt asymmetric partitioned cooling technology, which designs more dense and independent cooling circuits on the inner side of the elbow (where material flow converges and stress is concentrated), while using balanced cooling on the outer side. This precisely compensates for the uneven shrinkage caused by wall thickness differences, effectively suppressing deformation and internal stress from the root. The runner system often employs a combined design of hot runners and cold runners, using hot runners in the main runner to prevent cold slug formation and switching to cold runners in the branch runners to control costs, achieving the best balance between melt delivery and energy consumption. To solve the demolding problem inside the elbow, molds often integrate multi-stage hydraulic or inclined core-pulling mechanisms. Through precise timing control, the core can contract in stages while performing complex core-pulling actions, ensuring that thin-walled elbows can be demolded without damage. 
Currently, the cutting-edge development of molds emphasizes performance-oriented predictive manufacturing. With the aid of mold flow analysis software, the location and strength of weld lines can be predicted in the design stage, and active optimization can be achieved by adjusting the gate position or introducing a slight overpressure injection process. Such molds have become the foundation for achieving key indicators such as high pressure resistance, zero leakage, and long service life of water pipe fittings. Their technological evolution directly promotes the development of green buildings and water-saving systems towards greater reliability and efficiency.