Core box for box casting piece

Abstract

The invention discloses a core box for a box casting piece. The core box comprises a bottom plate, four side plates, a bottom plate insert and a side plate insert, wherein concave openings are formed in the same side of the four end surfaces of the bottom plate; a structure opposite to a lug boss of the box casting piece is arranged on the inner side surface of the bottom plate so as to the lug boss of the box casting piece; the four side plates are perpendicularly arranged in the concave openings in the four end surfaces of the bottom plate in sequence, concave openings which are matched with one another are formed in the two end surfaces of any adjacent side plates; structures opposite to an inner cavity lug boss and a parting surface of the box casting piece are respectively formed on the four side plates so as to form the inner cavity lug boss and the parting surface of the box casting piece; the bottom plate insert is connected to the inner side of the bottom plate in a locking manner, the inner sides of the side plates are connected with the side plate insert in a locking manner. The core box for the box casting piece is reasonable in structural design, and convenient and quick to use, the manufactured products are precise, a split structure is adopted, and the positive effects of smoothly molding a sand core, positioning the sand core and manufacturing the sand core can be achieved.

Description

technical field [0001] The invention relates to an auxiliary production technology for box body castings, in particular to a core box for aerospace box body aluminum alloy castings. Background technique [0002] There are many small boxes or castings similar to boxes in aviation and aerospace weapon systems. The size of the casting is small, the maximum size is 230×200×160, there are many bosses and parting surfaces in the inner cavity, the space is narrow, and the minimum gap is only 3mm, so higher requirements are put forward for the design method of the core box. [0003] In the process of designing similar casting core boxes in the past, the design of the boss structure of the inner cavity has always been a problem: First, there are many bosses in the inner cavity of the casting. If all of them are loose blocks, it will make it difficult to process the mold, and the positioning effect is not good, resulting in dimensional accuracy. Low and difficult to detect; the secon...

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