Blowing knockout head of casting mold

Abstract

The invention relates to a blowing knockout head of a casting mold. The blowing knockout head comprises a fixing base. A lifting air cylinder is arranged on the upper surface of the fixing base. A plurality of ejector cores are arranged on the lower surface of the fixing base. The fixing base is of a hollow structure with an inner cavity, and an air inlet pipe communicated with the inner cavity of the fixing base is arranged on the upper surface of the fixing base. The ejector cores are rotationally connected with the fixing base through installing heads. Each ejector core is of a hollow pipe structure with an air conducting channel, and a plurality of vertically-arranged jet flow holes communicated with the air conducting channel of each ejector rod are formed in the side wall of each ejector core. The distances between the adjacent jet flow holes are gradually increased from top to bottom along the ejector cores. Soft erasing sleeves are arranged on the outer walls of the lower ends of the ejector cores. The installing heads are rotationally connected with the fixing base through bearings and provided with air ventilation cavities communicated with the inner cavity and the air conducting channels. The inner diameter of the air ventilation cavities is larger than the inner diameter of the air conducting channels. The installing heads are provided with driven gears, the adjacent installing heads are synchronously connected through engagement of the driven gears, and the driven gear at the outermost end of one side is driven by a drive motor.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to the cleaning technology of casting moulds. Background technique [0002] At present, many castings are covered with iron mold sand, and the coated sand is generally made of phenolic resin, which will collapse at high temperature and fall off the mold automatically by the weight of the sand, but for the sand in the sand shooting hole of the iron mold, Relying on its own weight, it cannot completely fall off, so manual cleaning is required later, so the labor intensity is relatively high, and the production cost will also increase accordingly, and manual cleaning will inevitably cause omissions. At present, the mechanical cleaning device that has appeared uses the top core to be inserted into the sand shooting hole to drop the sand from the mold. This method requires the top core to be in contact with the inner wall of the sand shooting hole. The pressure will cause some damage to...

AI Technical Summary

Problems solved by technology

[0002] At present, many castings are covered with iron mold sand, and the coated sand is generally made of phenolic resin, which will collapse at high temperature and fall off the mold automatically by the weight of the sand, but for the sand in the sand shooting hole of the iron mold, Relying on its own weight, it cannot completely fall off, so manual cleaning is required later, so the labor intensity is relatively high, and the production cost will also increase accordingly, and manual cleaning will inevitably cause omissions

At present, the mechanical cleaning device that has appeared uses the top core to be inserted into the sand shooting hole to drop the sand from the mold. This method requires the top core to be in contact with the inner wall of the sand shooting hole. The pressure will cause some damage to the inner surface of the sand shooting hole, thus affecting the normal use of the mold

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