Lost-foam Casting Line

Posted by Vico Casting at 17/11/2021

Lost-foam casting technology is the leading modern and advanced casting technology in Vietnam today with many outstanding advantages compared to traditional methods.

Lost-foam casting technology: is a modern technology and newer than traditional technology.

Stages as below:

1. Preparation stage:

a. Mold making step:

– Cut styrofoam to make molds

– Attach the foam mold to the feeder

– Paint the mold with a layer of special paint (anti-collapse when sand is inserted, high temperature resistant)

– Dry the paint layer

b. Steel melting step:

– Mix steel materials with other additives to put into the furnace

2. Casting stage:

– Put the mold in the sandbox

– Pour the melted ingredients into the mold through the mold funnels

– Vacuum to make the mold firm

– Wait for the product to freeze

– Remove the product from the sand tank to cool and clean (by a blower to clean the surface paint on the product)

3. Heat-treatment stage:

– Transfer the product into furnace after finishing casting.

4. Machining and completing stage:

– Detach the product from the feeder

– Grind, polish products or machine, turn details

– Stock the finished product.

5. Testing stage:

– Products during the melting stage are sampled and tested to determine the mechanical properties of the product, analyze the grain texture inside the product (by modern spectrophotometer).

Advantages of Lost-foam Casting Technology: High-accuracy castings significantly reduce the need for additional machining after the casting stage, reduce environmental pollution, and reduce costs of material consumed when making molds.

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