Negative-pressure molding process of casting refractory material product

Abstract

The invention discloses a negative-pressure molding process of a casting refractory material product, comprising the following steps: 1. placing a model on a template with an exhaust chamber, wherein, the model is equipped with air vents; coating a thin film on a model surface layer, and sticking the thin film on the model surface layer by vacuum suction; and spraying zircon powder paint on the model outer surface coated with the thin film; 2. placing a sand box on the template surrounding the model, wherein, the side wall of the sand box is equipped with a filtering air tube; filling dry sand into the sand box, slightly shocking, coating a back film to close the sand box, and sucking the sand box in a negative pressure condition so as to harden a casting mould; 3. removing the vacuum status of an exhaust chamber in step 1, lifting the box and drawing to finish casting box; 4. reserving a casting head and an exhaust vent on an upper box consistent with the casting box of the casting mould, filling up dry sand, sealing the thin film and then sucking an inner cavity in a negative pressure condition; and 5. closing the upper box and the casting box to form an overall casting mould with the casting head and the cavity; removing the upper box and the casting box at the front of a furnace for direct pouring under a negative pressure status; and after maintaining pressure and solidification, keeping the temperature of a workpiece for 7-12 days to obtain the casting refractory material product.

Description

technical field [0001] The invention relates to a molding method for melting and casting refractory products and metal oxide castings, in particular to a negative pressure molding process for melting and casting refractory products. Background technique [0002] In the molding process of zirconium corundum products used in glass and glass product kilns, water glass sand has been used. However, due to the difficulty in regeneration of water glass sand, high cost, low reuse rate, and a large amount of industrial waste can be generated for one-time use, there has been no other method to replace it. At the same time, water glass needs to be added to the sand mixer for mixing, shaping, drying, and sticking. The process is complicated, labor-intensive, and power consumption is large; the casting mold needs to be combined and bonded by more than six plates, and the dimensional accuracy is high. Not guaranteed. The negative pressure sealing molding process is a technology that doe...

AI Technical Summary

Problems solved by technology

However, due to the difficulty in regeneration of water glass sand, high cost, low reuse rate, and a large amount of industrial waste generated by one-time use, there has been no other method to replace it.

At the same time, water glass needs to be added to the sand mixer for mixing, shaping, drying, and sticking. The process is complicated, labor-intensive, and power consumption is large; the casting mold needs to be combined and bonded by more than six plates, and the dimensional accuracy is high. not guaranteed

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