Sand injection device of sand shooting machine for casting

Abstract

The invention discloses a sand injection device of a sand shooting machine for casting. The sand injection device comprises a sand storage hopper used for storing sand; the lower part of the sand storage hopper is communicated with a horizontal pipe through a vertical pipe, a sliding block is embedded in the horizontal pipe, and the right side of the sliding block is connected with the inner wallof the horizontal pipe through a spring telescopic sleeve; the lower end of the horizontal pipe is communicated with a discharging pipe. The sliding block is arranged in the horizontal pipe, the sliding block is connected with the spring telescopic sleeve, the vertical pipe and the discharging pipe are arranged on the two sides of the sliding block respectively, a spiral blade is driven by a rotating shaft to push the sand to move, and the sliding block is extruded, so that communication between the horizontal pipe and the discharging pipe for discharging is realized, the opening and closing of the discharging pipe can be well controlled, and uniform discharging control is achieved; a crushing knife and a third spiral blade are arranged, so that the sand stored in the sand storage hopper is turned and crushed, the fluidity of the sand is improved, the discharging smoothness is further improved, and the discharging efficiency is improved.

Description

technical field [0001] The invention relates to the field of casting equipment, in particular to a sand injection device of a sand shooting machine for casting. Background technique [0002] Casting refers to the processing method of melting solid metal into liquid and pouring it into a mold of a specific shape, and waiting for it to solidify and form. The metals to be cast include: copper, iron, aluminum, tin, lead, etc. The common casting materials are raw sand, clay, water glass, resin and other auxiliary materials. Special casting molds include: investment casting, lost foam casting, metal casting, ceramic casting, etc. The injection molding machine uses compressed air to evenly inject the molding sand into the sand box for pre-tightening, and then applies pressure for compaction. Commonly used are vertical type boxless injection molding machine and horizontal type out-of-box injection molding machine. [0003] The discharge pipe of the traditional sand shooting machi...

AI Technical Summary

Problems solved by technology

[0003] The discharge pipe of the traditional sand shooting machine is equipped with a hydraulically driven ram to control the opening and closing of the discharge pipe. There is a gap between the ram and the disch

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