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What is compaction sand molding machine?

Edit:Quanzhou CBC Group CorporationUpDate:Feb 14, 2019

The molding machine can be divided into compaction type, shock compaction type, shock pressure, injection molding machine and sand blasting machine according to the method of compacting sand.

Compaction machine

Use the air pressure or hydraulic pressure to apply pressure to the molding sand in the sand box through the indenter or the pattern to compact the sand. Its pressure is generally 0.25 to 0.4 MPa. This type of molding machine makes the sand type tightness away from the pressure surface. A high-pressure molding machine appeared in the early 1950s, and the pressure on the sand plane was above 0.7 MPa. The pressure head of the high-pressure molding machine is divided into several structural forms such as a flat pressing head, a forming indenter and a multi-contact indenter. Among them, the high-pressure multi-contact molding machine is the most widely used. The high-pressure multi-contact molding machine head is divided into a number of small squares that can move up and down—contacts, which can obtain a large compressive strength through hydraulic cylinders. In real time, each contact applies a corresponding pressure according to the height of the pattern below it (ie, the thickness of the pressed sand layer), so that the sand type obtains a high, uniform compactness and hardness. These molding machines are equipped with a micro-shock shock mechanism that can adapt to the complex shape. The high-pressure multi-contact molding machine adopts four-column structure, and has single-station type and double-station type. In order to adapt to the production of small and medium-sized castings, this type of molding machine is often equipped with a template quick change device. When the template is replaced, the molding machine does not have to be shut down. With high-pressure multi-contact molding, sand casting can cast thin-walled, precise-sized, smooth-surfaced castings.