Positioning method for wrapped sand core and positioning structure for foundry sand core

Abstract

The invention discloses a positioning method for a wrapped sand core and a positioning structure for a foundry sand core, aiming at providing a positioning method for a wrapped sand core and a positioning structure for a foundry sand core which have reliable and steady sand core positioning, high production efficiency, realize casting with a complex cavity inner structure easily and improve the qualified rate of castings effectively. The positioning structure comprises a main sand core and a sub sand core, wherein product molding parts and embedding par are arranged on the main sand core and the sub sand core; the positioning method comprises the following steps of: firstly, dividing the main sand core into a first main sand core and a second main sand core; forming dividing surfaces on the first main sand core and the second main sand core; then arranging limiting slots for containing the embedding part of the sub sand core on the dividing surfaces of the first main sand core and the second main sand core; and finally, clamping the embedding part of the sub sand core in the limiting slot through the first main sand core and the second main sand core, and positioning the first main sand core, the second main sand core and the sub sand core on a mould through the embedding part of the main sand core.

Description

technical field [0001] The invention relates to a foundry sand core, in particular to a wrapping sand core positioning method and a foundry sand core positioning structure applying the method. Background technique [0002] In the sand casting process, the sand core is an important component that forms the casting cavity. The sand core usually includes a product forming part that forms part of the product, and a fitting part arranged at one end of the sand core for cooperating with the mold; the sand core is generally positioned on the mold through the fitting part. The internal structure of some casting cavities is very complex, which makes the design of sand core molds for making sand cores very difficult or even impossible. like Figure 5 As shown, an embedded cavity 19 is also embedded in the main cavity 18 of the casting 17 , and the outlet of the embedded cavity 19 is located in the main cavity 18 . like Image 6 As shown, in the process of making the sand core of th...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the current castings with very complicated internal structure of the cavity. Because the sand cores are difficult to be integrally formed, the production cost of the castings is increased and the production efficiency is reduced; and the split sand cores are prone to positioning deviation, Misalignment, which leads to a high failure rate of castings; provide a sand core positioning method that is reliable, stable, high in production efficiency, easy to realize castings with complex internal structures in the cavity, and can effectively improve the qualified rate of castings. And casting sand core positioning structure

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