Iron mold sand-covered casting device and casting process for three-open box ring castings

Abstract

The invention discloses an iron mold sand-covered casting device and a casting process for three-open box ring castings, belonging to the field of iron mold sand-coated casting. The casting device includes an upper sand box, an upper mold, a lower sand box and a lower mold. The upper mold is equipped with a pouring system, and also includes a middle sand box and a middle mold. A columnar middle mold movable block is arranged on the top, and a middle mold insert is arranged on the back of the middle mold movable block, and positioning devices are arranged between the middle sand box, the upper sand box and the lower sand box respectively. The casting process includes: heating the mold and the sand box; molding, closing the box; pouring and finally getting the casting product. The invention realizes the production of ring-type and three-open-case castings by using the iron mold sand-covered casting process, and the product quality is reliable and stable, the yield rate is high, and the dimensional accuracy is high.

Description

technical field [0001] The invention relates to the technical field of iron mold sand-coated casting, in particular to an iron mold sand-coated casting device and a casting process for three-open box ring castings. Background technique [0002] Iron mold sand-covered casting technology has attracted much attention for its unique advantages, and this technology has also been gradually promoted. However, the high cost of investment in casting equipment in the early stage, and many problems such as casting deformation and cracking caused by repeated thermal expansion and contraction and the impact of the casting environment during use, also make many people dare not get involved easily. [0003] Iron mold sand-covered casting technology is especially advantageous in smaller sizes such as discs, rods, and shafts, which are basically two out of the box. However, for the castings of the ring type and the three-open box, the research on the iron mold sand-covered casting process a...

AI Technical Summary

Problems solved by technology

However, for the castings of rings and three-open boxes, the research on iron mold sand-covered casting technology and casting equipment is still blank.

[0004] The middle part of the ring casting is concave and cannot be released smoothly. If it is cast out of the box, the above problem can only be solved by placing the sand core in the middle. In addition, the more important thing is that the sand core has a large size and a large wall thickness, which is inconvenient to operate and loses the advantages of the iron mold sand coating process.

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