Home > About Us>Our Factory

Our Factory

Ningbo Supreme Machinery Co., Ltd is a professional Metal Foundry in China. We have been producing gray iron casting, ductile iron casting and and precision investment casting for more than 25 years.

We are dedicated to meet different requirements of various customers across the world, products are mainly involved agricultural machinery casting and construction machinery casting, hydraulic casting , Mining industry, automotive part, post tension anchorage, some steel casting and stainless steel casting for pump part and valve body, pipe fittings, railway part etc.

We have updated our production line. Our production process include resin sand molding line, shell molding line, green sand casting and lost wax investment casting production process.

Material We Can Do:

Ductile Cast Iron

Gray Cast Iron

Stainless Steel

Carbon Steel

Alloy Steel

Production Process We Can Do:

Ductile Iron Casting

Gray Iron Casting

Resin Sand Casting

Green Sand Casting

Shell Molding Iron Casting

Automatic Molding Casting

Lost Foam Casting

Investment Casting

Lost Wax Casting

Silica Sol Casting

Water Glass Casting

What's Green Sand Casting?

Green sand casting process is a kind of casting production method, which uses green sand as the molding material, the process called "green sand" casting not because the sand is green but because the sand is moistened with water and clay rather than oil. The term Green Sand means the presence of moisture in molding sand and indicates that the mold is not baked or dried. Green sand is a kind of wet quartz sand.

Except of green sand, this process need to use the cupola or medium frequency furnace. As for the molding equipment, some iron foundries use the molding machines, automatic molding lines, or just use manual molding method.

Green Sand Casting Advantages:

1. Simple production process

2. Lower production costs

3. Higher production rate

Green Sand Casting production line:

What is Resin Sand Casting?

Resin sand casting process is a kind of casting process by using the resin sand as the molding material. Resin sand is a kind of mixture of quartz sand and resin. After mixing and burning, the resin sand could become very hard and solid, so we called it as the hard mold. The iron casting made by resin sand will be usually called as resin sand casting.

Resin Sand Casting advantages:

1. Dimensional accuracy, clear external outline

2. Smooth surface, good quality

3. Energy saving, labor saving.

Resin Sand Casting production line

What is Silica Sol Investment Casting?

Silica sol investment casting and water glass are the two primary investment casting methods now days. The main differences are the surface roughness and cost of casting. Water glass method dewaxes into the high-temperature water, and the ceramic mold is made of water glass quartz sand. Silica sol method dewaxes into the flash fire, and silica sol zircon sand makes the ceramic mold. Silica sol method costs more but has the better surface than water glass method.


1. High dimensional accuracy,good surface and quality

2. Better corrosion resistance

3. Less failure rate

Silica Sol Investment Casting production line:

What is Water Glass Casting?

Water glass casting is mostly used for steel and stainless steel components. By using this technique, more complicated designs can be made compared to the sand casting technique.

Water glass casting also cost less than Silica sol investment casting especially for the big size products, however less precise in dimensions. Components made of Water glass casting are mainly used in heavier / stronger and yet more complex shapes are required. Applications of this technique are widely presented in production of trailers, agricultural machinery and in offshore industry.


1. Lower cost price, since expensive processing and welding operations are eliminated;

2. Cheap moulding process;

3. Complex design without draft angles;

4. Higher accuracy in comparison to sand casting.

Water Glass Casting production line:

We also can provide some machining service for our customers after casting.