Casting method of core of casting mould

Abstract

The invention discloses a casting method of a core of a casting mould, comprising the following steps of: firstly assembling and sealing the casting mould, injecting liquid (water) from an inlet, and then placing a sealing plug containing a water discharge guide pipe into a water injection opening; secondly placing the casting mould at a sealing environment with specified cooling and heat-preserving effects and relatively closed conditions so that water is coagulated and formed into an ice body at the closed environment, and then taking an obtained ice core out of the casting mould and placing the ice core into a specified environment for storage and later use; finally assembling the ice core into the casting mould, injecting waxes, cooling, and melting the core so as to obtain a wax mould with a needed cavity. According to the casting method disclosed by the invention, environmental pollution is eliminated; a production period is shortened; resource waste is prevented; a field work environment is improved; the problems of wax saponification is solved; and the stability of casting quality is enhanced.

Description

technical field [0001] The invention mainly relates to the field of precision casting water-soluble cores, in particular to a method for replacing traditional urea cores and water-soluble wax cores. Background technique [0002] The existing methods for forming the inner cavity of the precision casting wax mold include: metal mold core pulling (block core pulling and insert core pulling), Huff mold, urea core, water-soluble wax core, etc.; among them, urea core and water-soluble wax core belong to water soluble core; [0003] The urea core and water-soluble wax overcome the disadvantage that the complex inner cavity cannot be core-pulled to take the mold, and at the same time avoid the repair of the inner cavity, and can make products with more complex shapes; [0004] But the biggest problem at present is: when urea core is made, NH will be decomposed at 150°C, which will pollute the environment and corrode the mold; urea dissolves through water, if it is directly discharg...

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Problems solved by technology

[0004] But the biggest problem at present is: when urea core is made, NH will be decomposed at 150°C, which will pollute the environment and corrode the mold; urea dissolves through water, if it is directly discharged, it will cause great environmental pollution, and the cost of recycling and treatment will be too high. In addition, during the dissolution process of the wax pattern, saponified wax will be formed due to the contact with the surface of the solution, which will affect the surface quality of the wax pattern and the performance of the wax; although the pollutant discharge of water-soluble wax is relatively small, it is particularly difficult to dissolve (generally, the urea core takes a few minutes to tens of Minutes to dissolve, but water-soluble wax needs several hours or even days to dissolve. During this period, the solubility of the solution decreases over time, and adjustments are required) The time is too long, the manufacturing cost is high, and the cycle is long; during the dissolution process, the solution will also Saponification reaction of wax

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