Method for preparing metal core for investment casting and precision investment casting method for aluminum alloy casting based on metal core
A technology of investment precision casting and aluminum alloy castings, which is applied in casting molding equipment, metal processing equipment, casting molds, etc., can solve the problems of small gaps and high requirements on the surface quality of gaps, and achieve the effect of high dimensional accuracy
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[0022] Example 1
[0023] A method for preparing a metal core for investment casting includes the following steps:
[0024] Metal core and molding: see figure 1 with 2 , Design a metal core 2 with a width of 0.50mm, leave a 7mm core head 3 on one end and reserve a hole 4 for removing the metal core on the core head 3, and the other end is the forming part 5, and then cut with a slow wire The nickel-based or iron-based high temperature alloy is processed into a designed metal core 2 and the surface of the metal core 2 is ground and polished to make the size accuracy of ±0.04mm.
[0025] A method for investment precision casting of aluminum alloy castings based on a metal core includes the following steps:
[0026] 1) Mold shell production: mix water glass, boric acid and titanium oxide according to the mass percentage of 5:25:70 to prepare titanium oxide coating. Use hot water to dissolve and dilute the titanium oxide coating to a concentration of 1.2g / cm 3 , The metal core 2 is heated...
Example Embodiment
[0030] Example 2
[0031] A method for preparing a metal core for investment casting includes the following steps:
[0032] Metal core and molding: design a metal core 2 with a width of 0.70mm, leave a 7mm core head 3 on one end and reserve a hole 4 for taking out the metal core on the core head 3, and the other end is the molded part 5, and then use The slow wire cutting method processes the nickel-based or iron-based high-temperature alloy into a designed metal core 2 and grinds and polishes the surface of the metal core 2 to make the size accuracy ±0.04mm.
[0033] A method for investment precision casting of aluminum alloy castings based on a metal core includes the following steps:
[0034] 1) Mold shell production: mix water glass, boric acid and titanium oxide according to the mass percentage of 3:29:68 to prepare titanium oxide coating. Use hot water to dissolve and dilute the titanium oxide coating to a concentration of 1.2g / cm 3 , The metal core 2 is heated to 100° C., and t...
Example Embodiment
[0038] Example 3
[0039] A method for preparing a metal core for investment casting includes the following steps:
[0040] 1) Metal core and molding: design a metal core 2 with a width of 0.6mm, leave a 7mm core head 3 on one end and reserve a hole 4 for taking out the metal core on the core head 3, and the other end is a molded part 5. Then, the nickel-based or iron-based high-temperature alloy is processed into a designed metal core 2 by a slow-moving wire cutting method, and the surface of the metal core 2 is ground and polished to make its dimensional accuracy ±0.04mm.
[0041] A method for investment precision casting of aluminum alloy castings based on a metal core includes the following steps:
[0042] 1) Mold shell production: mix water glass, boric acid and titanium oxide according to the mass percentage of 7:21:72 to prepare the titanium oxide coating. Use hot water to dissolve the titanium oxide coating and dilute the concentration to 1.2g / cm 3 , The metal core 2 is heated...
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