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Sand casting

Sand casting

What we can achieve by sand casting

Description

Molding by hand

Molding by Auto Machines

Max size of casting

1500mmx1000x500mm

1000mm x 800mm x 500mm

Casting weight

0.5kg to 1,000kg

0.5kg to 1,000kg

Annual Capacity

3,000 tons to 5,000 tons

6,000 tons to 8,000 tons

Casting tolerance

On request or standards

Molding Materials

Green sands, resin coated sands

Casting metal& Alloys

Grey iron, Ductile iron, carton steel Alloy steel,Brass….

 

Step of sand casting Process

  1. Making pattern

Patterns made of goods, resin(plastics) or Aluminum can be used to produce during casting.  But the Aluminum costs will be the highest and will be the most suitable process if you need thousands of castings with high dimensional tolerances and better surface quality.

  1. Molding process

The resin sand will be mixed by the sand treatment equipment, then shoot into the sand boxes. The molding workers will guarantee the sand can be filled to all positions, then make the sand as solid as possible.

  1. Self-hardening

After molding by workers, sand is still loose, then sand mold will be coated by a type of alcoholds based coating,  after burning, the resin sand mold will become solid. This is why casting process is called as hard hold casting process.

  1. Melting and pouring

Just like sand casting process, medium frequency electrical furnaces are used to melt iron for sanding casting process.

  1. Sand blasting, cleaning and grinding

The shot blasting process is to remove the sand, oxides… then workers will cut of the gating systems, grind the gating and parting lines. Finally, the rough castings will be completed.

If the 2nd processes like machining are needed, these complete castings will be taken to the next steps.

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KienBai commune, Thuy Nguyen District, Hai Phong City, Vietnam

Iron casting in Viet Nam
vietnamcastiron@gmail.com

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