Sand Casting

We have ISO / IATF certified supplier base and our partner suppliers are experienced in automotive, aerospace, agricultural and industrial machinery manufacturing for many years.

Production capabilities : Up to 2000 kg /piece

Quantity: 1 piece to large volumes of production

Pattern Types: Aluminum , Wood , Poly-Urethane , Epoxy (Araldite)

Molding Types: Automatic , Manual

GREEN SAND

The method
A mixture of sand and clay is packed around a pattern that has the desired casting shape in GREEN SAND CASTING. The pattern is then removed for revealing the cavity into which molten metal is poured. When the metal solidifies, the mold is broken in order to get the casting. When large volumes of castings are required, the ‘automated’ green sand casting technique is used and  Aluminum patterns are used because they can resist the wear of frequent molding. The ‘manual’ green sand casting process is used when small quantities of castings are required. It uses wood patterns because they are cheap. Mold compaction is done manually using hand rammers which makes molding slow and labor-intensive.

Process characteristics : Primary shaping processes , Discrete

Technical information

The majority of aluminum- and copper-based alloys, steels, and cast irons are appropriate for the method. The most typically utilized material is cast iron. The method is not suitable for refractory or reactive metals.

Draft angle: 1-5°

Surface quality: poor.

Machining allowance: 1.5-6 mm.

Minimum section: Typically 3 mm for light alloys, 6 mm for ferrous alloys.

Typical uses
There are numerous applications of green sand casting. Machine-tool bases, structures, and other components, pump housings, internal combustion engine blocks and cylinder heads, transmission cases, gear blanks, crankshafts, and connecting rods are typical examples.

DRY SAND

As dry sand molds are tougher and more rigid, they have been widely used in the manufacture of massive heavy castings. For casting steels, ‘skin-dry’ sand (mold surface dried only) is applied.