Sand box structure for lost foam casting

Abstract

The invention relates to the technical field of casting equipment, and discloses a sand box structure for lost foam casting. The sand box structure comprises a sand box, a model is fixedly arranged inthe middle of an inner cavity of the sand box, the inner cavity of the sand box is filled with dry sand, and airflow holes are formed in the inner wall of the sand box; a vibration diaphragm is fixedly arranged at one side, close to the inner cavity of the sand box, of the interior of each airflow hole, and an inclined hole is formed in each airflow hole and located below the vibrating diaphragm.Through the sand box structure for the lost foam casting, the vibrating diaphragms vibrate to generate sound waves through flowing airflow, the sound waves are transmitted to the dry sand to achievea compaction effect towards the center on the dry sand, so that the dry sand is compacted on the outer surface of the model by a certain thickness at first, then the certain amplitude of the sand boxis increased, and the compaction efficiency of the remaining dry sand is improved; the problems that existing dry sand is compacted upwards layer by layer at the bottom of the inner cavity of the sandbox, the amplitude must be stable, and the compaction efficiency is low are solved, and the casting efficiency of equipment is improved.

Description

technical field [0001] The invention relates to the technical field of casting equipment, in particular to a sand box structure for lost foam casting. Background technique [0002] The sand box for lost foam casting is a special sand box. The basic structure is a box-shaped body with an open top. There are two types of round and square. There are also a few follow-up sand boxes. Put the model into the sand box and fill it with dry sand , under the action of the vibrating mechanism, the dry sand in the sand box vibrates tightly, making the dry sand compact in sequence from the bottom to the top inside the sand box, so that the dry sand is in close contact with the outer surface of the model, and then the metal solution is poured . [0003] In such a sand box structure, during use, since the dry sand is vibrated and compacted sequentially from the bottom to the top, in order to prevent the model from being damaged by the vibrating dry sand, it is necessary to limit the vibrat...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a sand box structure for lost foam casting, which has the advantages that the dry sand in contact with the outer surface of the model is compacted first, and then the amplitude can be increased to increase the casting efficiency, and it solves the problem that the amplitude is limited to a certain range and cannot be increased. low efficiency

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