Core making process and core making device of triethylamine cold box

Abstract

The invention discloses a core making process and a core making device of a triethylamine cold box. The core making process comprises a plurality of sequential steps of primary sand shooting, primary gas blowing, primary tail gas recovery, primary core jacking and taking, subsequent sand shooting, subsequent gas blowing, subsequent tail gas collection and compression, subsequent core jacking and taking, and core making finishing or circulating back to subsequent sand shooting; as the triethylamine mixed gas introduced into the box only functions in catalysis and does not joint in reaction, the discharged triethylamine tail gas is the same as the triethylamine mixed gas introduced in components and is capable of directly joining in the subsequent catalytic reaction; the use amount of the triethylamine in the subsequent core making process is saved, the use of phosphoric acid is reduced, and no gas is discharged to the atmosphere; in short, the core making process has the advantages of conservation and environmental protection.

Description

technical field [0001] The invention relates to the field of casting molding, in particular to a molding process and a molding machine in the field of casting molding. Background technique [0002] At room temperature, the core-making method that makes the sand core harden quickly in the core box by blowing air is called the cold box method. Triethylamine cold box is a commonly used cold box method. The mixture of molding sand and resin is shot into the sand After entering the core box, triethylamine gas is introduced into the core box to catalyze and accelerate the bridge between the resins, and then the mixture of molding sand and resin is solidified and formed. After that, the triethylamine tail gas in the core box is discharged, and then the core box is The sand mold in the core is ejected and the sand is taken out to complete a core-making process. [0003] Triethylamine is used as a cold box core-making catalyst and does not participate in the chemical reaction of the...

AI Technical Summary

Problems solved by technology

[0003] Triethylamine is used as a cold box core-making catalyst and does not participate in the chemical reaction of the core sand hardening process. The triethylamine and carrier gas blown in during the core-making process will be discharged from the core sand in full after completing the catalytic function. Ethylamine is a corrosive, toxic, flammable and explosive alkaline liquid that corrodes the mouth, esophagus and skin and can cause chemical burns, pulmonary edema and even death. Disposal and direct discharge into the atmosphere will seriously pollute the environment and endanger human health

[0004] The existing treatment method is to neutralize the triethylamine tail gas discharged from the core box with phosphoric acid. In this treatment method, not only phosphoric acid needs to be added, but also the treatment process is increased, and the tail gas after treatment still has some Pollution, so the above method wastes materials, has low production efficiency and is not environmentally friendly

Images