The heating insulation outlet sleeve, after contact with the metal liquid, heats the heating agent and heats the metal liquid. At the same time, the outlet sleeve has the effect of insulation, so it can extend the solidification time of the metal liquid in the outlet to a greater extent, forming a continuous and effective shrinkage effect on the casting, so you can choose to use a smaller volume of the outlet Castings are contracted, so as to improve the process yield rate of castings and reduce production costs. Jinan Shengquan Group Co., Ltd., as a leading raw material production base for casting in China, has always provided customers with all kinds of raw material products with excellent performance and stable quality. Among them, in the market application of heat insulation mouth cover series products, a rich variety of products, complete specifications and easy-to-use mouth cover products have been formed, and can be specially customized according to the needs of customers to provide high-quality guarantee for the quality of customers' casting products!