a sand mixer

Abstract

The invention discloses a sand mixer. The sand mixer comprises a base; the top of the base is connected with a large arm mechanism through a first rotary mechanism; the large arm mechanism comprises an upper chamber and a lower chamber, wherein the upper chamber is used for conveying old sand, and the lower chamber is used for conveying new sand; the upper part of the head end of the large arm mechanism is provided with a sand feeding mechanism, and a first sand inlet hole communicating with the upper chamber and a second sand inlet hole communicating with the lower chamber are arranged on thesand feeding mechanism; the bottom of the tail end of the large arm mechanism is connected with a double-small arm mechanism through a second rotary mechanism; and the double-small arm mechanism comprises an upper small arm mechanism and a lower small arm mechanism which are fixedly connected up and down. According to the sand mixer, the old sand and the new sand enter the upper small arm mechanism and the lower small arm mechanism through different channels respectively, the old sand and the new sand can be simultaneously added, or only the old sand or only the new sand can be added, so thatonly one kind of sand is mixed; and therefore, the sand mixer has the functions that the old sand and the new sand can be simultaneously added or individually added, the time is saved, and materialsare not wasted.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a sand mixer. Background technique [0002] The sand mixer is suitable for the continuous mixing of self-hardening sand such as modified water glass in the production of cast steel, cast iron, and non-ferrous alloys. Used in molding core production line. [0003] At present, according to the different process requirements of castings, when molding in the sand box, it is necessary to add new and old mixed sand. Usually, it is necessary to cover a layer of mixed old sand first, and then add new mixed sand, that is, when casting molding A sand mixer is required to mix the new sand and the old sand separately. However, most of the existing sand mixers can only mix one kind of sand material with liquid materials such as curing agent. Therefore, after the sand mixer finishes mixing the old sand with liquid materials such as curing agent, it needs to New sand can only be ...

AI Technical Summary

Problems solved by technology

However, most of the existing sand mixers can only mix one kind of sand material with liquid materials such as curing agent. Therefore, after the sand mixer finishes mixing the old sand with liquid materials such as curing agent, it needs to After all the old sand is cleaned up, new sand can be added, and then the new sand is mixed, which will not only waste time but also cause waste of old sand

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