Technique for embedding stainless steel tube in large-size aluminum alloy casting blank

The invention relates to a technique for embedding a stainless steel tube in a large-size aluminum alloy casting blank, belonging to the technical field of casting. The technique comprises the following steps: manufacturing a wood mold with a pipe chase according to a drawing, and putting the wood mold into a sand box to manufacture inner and outer sand molds; halving the pipe chase according to the distribution and position characteristics of the pipe chase in the inner sand mold; inserting a connecting rod, of which the upper and lower ends are penetrated by binding wires, into the inner sand mold via a fraction distance point, connecting the upper end of the connecting rod to the sand box, and connecting the lower end of the connecting rod to a water pipe; closing the box, and casting; after the solution becomes solidified and cooled, removing the connection between the upper end of the connecting rod and the sand box to discharge; and cleaning by removing the exposed part of the binding wire at the lower end of the connecting rod, and taking out the connecting rod to produce the stainless steel tube embedded casting blank, wherein the connecting rod is preserved for later use. The invention is mainly used for casting home appliance mold casting blanks, has the advantages of low production cost and high casting blank yield, enhances the service performance of the molds, and greatly prolongs the service life of the molds.