Special cold iron sand core and preparation method thereof
A technology of chilled iron sand core and sand core, which is applied in the field of casting production, can solve the problems of gray spot sulfur seepage, inconvenient setting of cold iron, shrinkage and porosity of inner hole transfer heat joints, etc., so as to ensure the quality of castings and prevent gray spot sulfur seepage Defects, the effect of accelerating the cooling rate
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[0017] The present invention will be further described below in conjunction with embodiment. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0018] refer to Figure 1-2 , a special chilled iron sand core, including a sand core body 1, the sand core body 1 includes a peripheral surface and a core head 11 arranged on the upper end of the peripheral surface and a core seat 12 at the lower end, the peripheral surface of the sand core body is provided There is an exhaust hole 3, and the center of the sand core body 1 is provided with an exhaust channel 2 passing through the core head 11 and the core seat 12.
[0019] The peripheral surface of the cold iron sand core body 1 is a conical surface with a small top and a large bottom. When in use, it is covered with a high-temperature resistant alcohol-based paint, and the material of the sand core body 1 i...
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