Sand ejection nozzle

Abstract

The invention relates to the technical field of formative technology equipment of precoated sand and discloses a sand ejection nozzle which comprises a three-way valve body equipped with a sand inletchannel, a sand outlet channel and a sand return channel as well as a rotary valve core which is disposed inside the three-way valve body, located at an intersection part of the sand inlet channel, the sand outlet channel and the sand return channel and used for channel rotation, wherein a movable sand outlet pipe assembly is connected to an outlet of the sand outlet channel; a straight-line motion execution element and a rotation motion execution element are disposed on the three-way valve body respectively; the straight-line motion execution element is connected to the movable sand outlet pipe assembly; and the rotary motion execution element is connected to the rotary valve code. The sand ejection nozzle disclosed by the invention has the advantages that the automation degree of precoated sand shaping is increased; and reliability of a sand ejection operation is enhanced.

Description

technical field [0001] The invention relates to the technical field of coated sand molding process equipment, in particular to a sand shooting nozzle. Background technique [0002] The sand shooting nozzle is a kind of process equipment in the coated sand molding equipment, which is a part of the sand shooting system. When the coated sand is molded, under the action of compressed air, the coated sand is ejected from the sand shooting nozzle, passes through the sand shooting plate and enters the cavity of the mold to complete the coated sand molding. [0003] In the prior art, the nozzle used for coated sand molding has a single-channel structure, which mainly has the following problems: [0004] One is that after sand shooting, some molding sand will fall on the mold, which needs to be cleaned manually with a scraper. On the one hand, the degree of automation of manual cleaning is low, and the efficiency and quality of cleaning are also poor. On the other hand, due to the h...

AI Technical Summary

Problems solved by technology

[0004] One is that after sand shooting, some molding sand will fall on the mold, which needs to be cleaned manually with a scraper. On the one hand, the degree of automation of manual cleaning is low, and the efficiency and quality of cleaning are also poor. On the other hand, due to the high mold temperature , there is a safety hazard in manual cleaning

[0005] The 2nd, the extensible sprinkler head of its front end of existing sand-shooting nozzle is a spring compression structure, and it is to make the nozzle and the sand-shooting plate stick closely by the active force of spring, because the compressive force of spring is relatively small, after long-term use, still Fatigue will occur, which may lead to a decrease in reliability under high-pressure sand shooting conditions, and there may be air or sand leakage at the close contact between the nozzle and the sand shooting plate, which will accelerate the wear of the sealing buffer ring at the front end of the sand shooting nozzle

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