Technology / product information

DISOCO’s Green Sand Casting Capabilities

Green sand casting is a metal casting method that uses a mixture of sand, water, and bentonite clay to form molds. It is referred to as “green sand” because the mold retains a certain level of moisture throughout the molding process.

When molten metal is poured into the mold, the green sand maintains its shape, producing castings with high strength and solid internal structure. This method is suitable for both small components and medium-to-large sized castings.

Key characteristics of green sand casting:

High flexibility for complex-shaped products

Low mold cost

Short preparation time

Well suited for mass production

Highly applicable to gray cast iron (FC) and ductile cast iron (FCD), two of the most common materials in industrial machinery

Green sand casting is the most widely used casting technology globally in industries such as engines, automotive and motorcycle manufacturing, electrical equipment, and industrial machinery.

Comparison of Casting Methods
• Green Sand Casting

Advantages: Low mold cost, high flexibility, easy mold forming, high-volume production, fast molding cycle
Limitations: Moderate dimensional accuracy and surface finish
Notes: Suitable for FC and FCD materials; common to moderately complex mechanical components

• Investment Casting (Lost Wax)

Advantages: Excellent surface finish; capable of producing highly intricate details
Limitations: High cost; long mold preparation time
Notes: Best suited for small parts requiring high precision and fine detail

• Lost Foam Casting

Advantages: Ability to cast complex shapes in a single pour; minimal or no parting lines
Limitations: High foam material cost; specialized equipment required; limited mold size
Notes: Suitable for pump housings, large casings, and specialized components

• Die Casting

Advantages: Highest dimensional accuracy; excellent surface quality; extremely high casting speed
Limitations: Applicable only to aluminum and zinc alloys; very high mold cost
Notes: Ideal for aluminum components in automotive and electrical equipment

For medium-to-large sized castings with complex structures, made of FC/FCD materials, requiring cost efficiency and high-volume production, green sand casting remains the optimal solution.

DISOCO’s Green Sand Casting Capabilities

DISOCO is one of the very few companies in Vietnam operating a fully automated green sand casting line that meets Japanese industrial standards. This enables high-volume production with consistent quality and competitive costs.

Technical specifications of the green sand casting line:

Automated green sand casting line: SINTO (Japan)

Annual capacity: 14,000 tons

Molding cycle time: 30 seconds per mold

Mold size: 700 × 600 × 500 mm

Casting weight range: 1–70 kg

Materials: Gray cast iron (FC), ductile cast iron (FCD)

Fully automated processes: sand mixing, mold forming, molten metal pouring, and shakeout

Quality control systems include:

Spectrometer for chemical composition analysis

3D CMM for dimensional inspection

Ultrasonic testing (UT)

Hardness and tensile testing

Sinto Sand Analyzer for sand quality control

With advanced Japanese automation, annual production capacity of up to 15,000 tons, and extensive experience in FC/FCD materials, DISOCO is a reliable partner for customers seeking:

Stable and consistent green sand casting quality

Competitive pricing

Mass production capability

Strict quality control with modern inspection equipment

If you require technical consultation or a detailed quotation for green sand casting projects, DISOCO is ready to support you from initial concept through to finished products.