Heat preserving furnace of low-pressure casting machine

Abstract

The invention relates to a heat preserving furnace of a low-pressure casting machine. The heat preserving furnace comprises a heat preserving furnace shell, heat preserving chambers, a sealable pressurized chamber, heaters, a plug rod mechanism and a pressurized chamber fixing mechanism, wherein the heat preserving chambers are arranged in the heat preserving furnace shell; the pressurized chamber is vertically arranged between the heat preserving chambers; the upper end and the lower end of the pressurized chamber are embedded into the heat preserving furnace shell; an isolating layer is arranged between the pressurized chamber and each heat preserving chamber; two ends of each heater respectively penetrate through two ends of the heat preserving furnace shell; the heaters penetrate through the heat preserving chambers or the pressurized chamber; the heat preserving furnace shell is also internally provided with a diversion trench communicated with the heat preserving chambers and the pressurized chamber; the plug rod mechanism is arranged in the diversion trench; the pressurized chamber fixing mechanism is embedded onto the heat preserving furnace shell, is connected with the pressurized chamber, and is used for fixing the pressurized chamber. Compared with the prior art, the heat preserving furnace has the advantages of convenience for continuous production, decrease in power consumption and improvement in product quality.

Description

Technical field [0001] The invention relates to the technical field of low-pressure casting, in particular to a holding furnace for a low-pressure casting machine. Background technique [0002] At present, the general-purpose low pressure casting machine holding furnace is generally a one-chamber, radiant silicon-carbon rod heating. The furnace chamber is used as an aluminum liquid storage chamber, as well as a heating chamber and a pressurizing chamber. The silicon-carbon rod is heated, and the heat is conducted through radiation and air. The method ensures the constant temperature of the molten aluminum in the furnace. This kind of holding furnace plays a key role in the application of the low-pressure casting machine. However, with the development requirements of casting technology, some problems and shortcomings are gradually emerging. First, when the aluminum liquid is added, production is stopped, which affects the continuity of production; second, during the production pro...

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Problems solved by technology

[0002] At present, the general-purpose low-pressure casting machine holding furnace is generally one room, heated by radiant silicon carbide rods. The furnace room is not only used as a storage room for aluminum liquid, but also as a heating room and a pressurized room. The silicon carbide rods are heated, and the heat is conducted through radiation and air. This kind of holding furnace plays a key role in the application process of low-pressure casting machines, but with the development requirements of casting technology, some problems and shortcomings are becoming more and more obvious.

First, when adding molten aluminum, production is stopped, which affects the continuity of production; second, during the production process, the furnace is filled and discharged with compressed air, which will take away a lot of heat and increase power consumption; third , during the production process of the one-chamber holding furnace, the height of the liquid aluminum level in the furnace is constantly changing, so it is necessary to perform pressure compensation after each product is produced, which cannot ensure the stability of the liquid level of the aluminum liquid well, and is easy to The inconsistency of the production process of the product is caused, which causes the fluctuation of the product quality; Fourth, the gas content of the aluminum liquid increases for a long time and cannot be degassed when the one-room holding furnace is working normally, so that the product quality cannot be guaranteed; Some deficiencies need to be improved

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