Heat preservation device for castings

Abstract

The invention provides a heat preservation device for castings. The heat preservation device comprises a shell, a furnace cover, heating devices and a heat preservation chamber. Supporting legs are fixed to the bottom of the shell. A heat preservation layer is arranged on the inner side of the shell. A floor tile layer is arranged on the inner side of the heat preservation layer. The heat preservation chamber is arranged in the shell. A sand layer is arranged at the bottom of the heat preservation chamber. The heating devices are installed on the two sides of the heat preservation chamber. Refractory fiber layers are arranged on the outer sides of the heating devices. Air pipes are arranged on the two sides of the upper end of the heat preservation chamber. A circulating hot air device is installed above the furnace cover. A negative-pressure cavity of the circulating hot air device is connected with one end of an air return pipe. An air return port is connected to the other end of the air return pipe and located in the bottom end of the furnace cover. A positive-pressure cavity of the circulating hot air device is connected with one end of an air supply pipe. The other end of the air supply pipe is connected with an air supply port. Compared with the prior art, the heat preservation device for the castings has the following beneficial effects that temperature distribution is even, and temperature control is facilitated.

Description

technical field [0001] The invention relates to a casting insulation device, which belongs to the field of casting equipment. Background technique [0002] After the casting is cast, only the surface is solidified, but the inside is still mushy, has no strength, and is easy to deform. At the same time, because the surface of the casting is cooled quickly, the internal cooling is slow, and thermal stress is likely to occur, resulting in cracks and scrapping of the casting. Castings are placed in the heat preservation device, and the castings can be taken out after they are slowly cooled to a certain temperature and have a certain strength. The greater the quality of the casting, the longer the time required for heat preservation. However, the temperature distribution of traditional heat preservation devices is uneven, and the temperature Control is more troublesome. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the object of the present in...

AI Technical Summary

Problems solved by technology

[0002] After the casting is cast, only the surface is solidified, but the inside is still mushy, has no strength, and is easy to deform. At the same time, because the surface of the casting is cooled quickly, the internal cooling is slow, and thermal stress is likely to occur, resulting in cracks and scrapping of the casting. Castings are placed in the heat preservation device, and the castings can be taken out after they are slowly cooled to a certain temperature and have a certain strength. The greater the quality of the casting, the longer the time required for heat preservation. However, the temperature distribution of traditional heat preservation devices is uneven, and the temperature more troublesome to control

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