Heating radiator casting process

Abstract

The invention discloses a heating radiator casting process which comprises the following steps: step I: molding sand is prepared, and the molding sand comprises components in percentage by mass as follows: 45%-60% of clay sand, 35%-46% of silica sand, 1.5%-5% of bentonite and 2%-4% of pulverized coal; step II: a sand box is manufactured, an up-and-down separation type is adopted, the sand box is of a steel framed structure, and positioning and clamping fixtures are installed at two ends of the sand box; step III: molding sand is loaded into the sand box, a forming cavity is formed by using the molding sand, and at least three sprues are formed in the side face of the forming cavity; step IV: a solution is prepared, and the temperature of the solution is kept to be in a range from 1450 DEG C to 1500 DEG C; and step V: the solution is injected into the forming cavity. According to the heating radiator casting process, steps are reasonable, so that the disadvantages of existing cast iron heating radiators in the casting process can be well overcome, and the casting and the processing of cast iron heating radiators within one meter are guaranteed.

Description

technical field [0001] The invention relates to a casting process, in particular to a casting process suitable for the manufacture of long-length cast iron radiators. Background technique [0002] Heating radiators are widely used in northern regions, and they are generally composed of multiple radiators. At present, the casting of gray cast iron heating radiators (hereinafter referred to as cast iron radiators) is still dominated by traditional casting methods, and the product height is basically limited to less than 1 meter, resulting in a waste of vertical space. It cannot be compared with high-end series products such as steel, steel-aluminum and copper-aluminum, which affects the decoration of this type of product and people's requirements for saving space. However, cast iron radiators have the characteristics of inherent anti-corrosion resistance and comfortable heat dissipation. For the above reasons, there is still a great market demand for cast iron radiators. The...

AI Technical Summary

Problems solved by technology

The casting process of the existing cast iron radiator is relatively simple. The method adopted is: single-gate oblique casting on the bottom surface of the radiator. Its characteristics are: fast forming speed and stable yield. The product effect is relatively good, but for products above 1 meter, the yield rate will be greatly reduced due to the lengthening of the filling distance and the increase of bottom pressure, and the rate of yield reduction will increase with the length of the casting, until it cannot forming