Green Sand Casting

Certified top quality production in Europe and Asia


Over the years, our experienced team has proven its worth by offering the best expertise and know-how in its field

Gamarra casting solutions

your one-stop-shop

Green sand casting solutions; covering all the manufacturing process, from design, patterns and casting to machining and finishing

Gamarra quality

Best Quality STANDARDS

All our products and processes are submitted to the most stringent internal and external quality, safety and environmental controls

corporate responsibility

Our corporate strategy addresses the global challenges we face; including inequality, climate, environmental degradation, prosperity and justice


We produce cast steel with an extensive range of physical properties. Offering both automatic and manual molding operations up to 300kg and max size 710 x 665 x 225/225  with carbon steel castings and different alloys3

Alloy Steel
Low steel
Carbon Steel

Our Green Sand Casting Production Process

A multi-step process that produces near-net shape precision casting parts. The process begins with the creation of patterns. These are then used to create moulds that are filled with molten metal to create the part. Secondary processing, such as machining, welding or painting can also be done. The process uses different machines such as furnace, injection, blasting, tumbling, cutting, grinding, etc. The process involves mainly the following steps

1. Pattern Design

Designing patterns is a complex process that requires very specific know-how.

2. Pattern Making

Patterns made of wood, resin (plastic) or aluminium could be used to produce during the casting

3. Molding Process

Moulds are created with sand that is pressed using the pattern to create the desired shape

4. Melting

Electrical furnaces are used to melt iron from scrap and the necessary alloys or additional components needed to achieve the desired final standard

5. Pouring and solification

Liquid steel is then poured into the moulds and left until it solidifies.

6. Shake-Out and Cutting

Once the metal has solidified and cooled down to the required temperature, the castings are removed from the sand mould by vibration. Then, each individual part is separated by knocking off or cutting

7. Shot Blasting and Finishing Processing

The parts are shot blasted to fully remove sand and oxides. The casting part is then fully customized through finishing processes: grinding, heat treatments, machining, component welding, et al

8. Testing, Packing and Delivery

Then the casting parts will be fully tested for the dimensions, surface, mechanical properties and other required tests before packing and delivery

Want to know more of green Sand Casting

A highly flexible process that can be used for high volume, fully automated casting or for very low number of parts. Sand, bound with clay and water, is used to make moulds around a pattern made of metal, wood or resin. Metal is poured into the mould and once solidified, the sand can be re-used over and over again making greensand casting one of the most cost effective and environmentally friendly of all the casting processes.

 Clay-bonded sands have provided the principal medium from which molds for castings have been produced for centuries. In essence the mold material consists of sand, usually silica in the quartz form, clay and water. The water develops the bonding characteristics of the clay, which binds the sand grains together. Under the application of pressure, the mold material can be compacted around a pattern to produce a mold having sufficient rigidity to enable metal to be poured into it to produce a casting. When the mold is used in its moist condition it is referred to as green and the method of producing the molds as the green sand molding process.

sant casting
sand casting

Industries and applications for green sand casting

Our green sand casting services are present in a wide variety of products, including high quality, top performance industrial parts. We typically serve the following industries:

Our quality assurance services and processes ensure product reliability and customer satisfaction

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