Sand ejecting structure of top ejecting and bottom ejecting

Abstract

The invention proposes a sand ejecting structure of top ejecting and bottom ejecting. The structure comprises a sand barrel, an upper support plate, a lower support plate, a mold and a power device, wherein an upper sand adding port and a lower sand adding port are respectively formed in the side wall of the sand barrel; an upper sand storage box with the side wall connected to the upper sand adding port is arranged below the upper support plate; an upper sand mold box is arranged on the lower side; a lower sand storage box is fixed on the lower support plate; an openable sand inlet is formed in the side wall of the lower sand storage box; a lower sand mold box is arranged above the lower sand storage box; the mold is arranged between the upper sand mold box and the lower sand mold box; and the sand barrel is connected with the power device. The structure adopts the upper sand storage box and the lower sand storage box to receive sand in the sand barrel, so that the sand can be directly injected into the upper and lower sand mold boxes by the upper sand storage box and the lower sand storage box in box closing, the synchronous sand adding by top ejecting and bottom ejecting is realized, and such problems as sand fluidity resistance and bad filling caused by side sand ejecting are improved.

Description

technical field [0001] The invention belongs to the field of casting, in particular to a top-shot and bottom-shot sand-shot structure. Background technique [0002] Sand casting is a casting method that produces castings in sand molds. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. Because the molding materials used in sand casting are cheap and easy to obtain, the casting mold is easy to manufacture, and it can adapt to the single-piece production, batch production and mass production of castings. It has been the basic process in casting production for a long time. [0003] In the prior art, the horizontal parting molding machine generally adopts the method of side-shot sand, and the product with a high mold plate height will block the fluidity of the sand due to the blocking of the mold plate, resulting in poor filling performance. After compaction, the sand mold will be tight. The solidity is not uniform. Contents of the invention ...

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Problems solved by technology

[0003] In the prior art, the horizontal parting molding machine generally adopts the method of side-shot sand, and the product with a high mold plate height will block the fluidity of the sand due to the blocking of the mold plate, resulting in poor filling performance. After compaction, the sand mold will be tight. Uneven solidity

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