Sand-cast molding compacting device and compacting method thereof

Abstract

The invention discloses a sand-cast molding compacting device comprising an upper compacting mechanism, a sand box, a chassis, a sliding mechanism and a drive mechanism. The sand box is arranged around the chassis, the sliding mechanism is arranged at the bottom of the sand box, the drive mechanism is connected with the sliding mechanism in a transmission manner, a protruded stopper is arranged around the upper end surface of the chassis and also forms a sealed region containing molding sands by matching with the inner wall of the sand box, the upper compacting mechanism is arranged above thesand box in a lifting manner, and the upper compacting mechanism can press the top of the sand box and cover the molding sands in the sand box in a downwards moving state. The invention also discloses a sand-cast molding compacting device. Compared with the prior art, the invention has the advantages that the compaction degree of the molding sand is largely improved by the matching of the sand box, the upper compacting mechanism and the sliding mechanism; an upper end and a lower end are compacted simultaneously, thus the molding sand at the bottom of the sand box can also be greatly compacted; and the density of each part of a sand mold gets uniform, so that the quality of demolded products is guaranteed.

Description

technical field [0001] The invention relates to a compacting device for molding sand in foundry molding, and also relates to a compacting method using the compacting device. Background technique [0002] Foundry casting is widely used in the casting of metal products. Firstly, a sand mold whose inner cavity matches the product is produced by a foundry molding machine, and then heated molten metal is poured into the sand mold through the sprue. After cooling, it is solidified to obtain the desired product. The required product, the molding sand is generally made of quartz sand with strong refractoriness. When the molding sand is molded into a sand mold, it needs to be compacted, so that the density of each part of the sand mold will be uniform, and the quality of the obtained casting product can be guaranteed. Traditional compaction is achieved by manual beating, which is laborious and inefficient. Later, a mechanical compaction mechanism was introduced. Although the labor fo...

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Problems solved by technology

Traditional compaction is achieved by manual beating, which is laborious and inefficient. Later, a mechanical compaction mechanism was introduced. Although the labor force was liberated, the compaction effect was not ideal. When compacting, it is generally compacted from top to bottom. Here There is a shortcoming that the upper molding sand is compacted, while the lower one is relatively loose. There is unevenness in the upper and lower parts, and the quality of the casting product is still difficult to guarantee. At the same time, mechanical compaction has a relatively large impact on the overall molding machine, which is easy to cause damaged, thereby reducing the useful life

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