Investment casting mold filling method for casting with reserved long and narrow cavity

Abstract

The invention provides an investment casting mold filling method for a casting with a reserved long and narrow cavity. The investment casting mold filling method comprises the following steps that a shell and a pouring gate assembly are prepared, wherein the pouring gate assembly comprises a straight pouring gate, a transverse pouring gate and an inner pouring gate, one end of the straight pouring gate is used as a sprue, the other end of the straight pouring gate is connected with one side of the transverse pouring gate, and the transverse pouring gate is connected to the center of an inner cavity of the shell through the inner pouring gate; and the shell is made to rotate around the length direction of the inner pouring gate, an alloy material smelted into a liquid state is injected into the shell from the sprue, and when the alloy material is condensed into a solid to obtain the casting. Through the adoption of the technical scheme, when the alloy material is poured, the shell is rotated to promote the alloy material to have to flow from the center of the inner cavity of the shell to the edge of the inner cavity of the shell under the action of centrifugal force when the alloy material flows in the shell, and the flowing direction of the alloy material in the inner cavity of the shell is basically kept consistent, so that turbulent flow is avoided, the defects of cold shut, air holes, inclusions and the like of the finally formed casting are prevented, and the forming quality of the casting is improved.

Description

technical field [0001] The invention relates to the technical field of casting technology, in particular to an investment casting mold filling method for castings with long and narrow cavities reserved. Background technique [0002] Investment precision castings are widely used in the field of aerospace. In the investment casting process, it is first necessary to prepare corresponding wax patterns according to the shape characteristics of the castings to be cast. Bond several sprues, and then bond all the sprues together through risers to form a module, then spray refractory sand on the surface of the module, and bake the module at high temperature to melt all the wax contained in the module At this time, the mold shell is made, and finally the molten alloy material is poured into the mold shell to make a casting. With the development of technology, people have more and more requirements for the function of casting products, and correspondingly put forward higher requiremen...

AI Technical Summary

Problems solved by technology

With the development of technology, people have more and more requirements for the function of casting products, and correspondingly put forward higher requirements for the shape and structure of casting products. Hollow casting products are an extremely important casting product. The existing In the technology, when the hollow casting product is poured and filled, the flow direction of the alloy material in the liquid state in the inner cavity of the shell has uncertainty and inconsistency, and turbulent flow is prone to occur, resulting in cold shut, pores, and inclusions in the final casting. and other defects, affecting the molding quality of castings

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