Investment 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

Investment 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

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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 30 kg and max size 900 x 900 x 400 with carbon steel castings and different alloys:

Alloy Steel
Low steel
Carbon Steel

Our Investment 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. Metal Die Making

Based on the drawings and requirements of the desired cast part, the metal die or mold, usually in aluminum, will be designed and produced. The cavity will form the same size and structure of the desired cast part

2. Wax Injection

Also as known as pattern formation, Lost wax casting patterns are created by injecting molten wax into the metal die above

3. Cluster Assembly

The wax patterns are then attached to a gating system, which usually is a set of channels through which a molten metal flows to the mold cavity. After that, a structure like a tree is formed, which is suitable for mass production

4. Shell Building

The investment castings outer shell casing is built up through dipping into a ceramic bath and then immediately coated with sand for several times

5. Die-waxing

The inner cavity of precision investment casting is then dewaxed, which leaves a hollow outer ceramic shell layer. The hollows are just the same space as the desired castings

6. Melting

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

7. Sawing or Cutting

Once the metal has cooled and solidified, the cast part(s) is then removed from the mould via shaking, cutting or friction sawing off the individual cast part

8. Pouring & Solidification

The ceramic moulds should be pre-heated before pouring, this prevents it from cracking once the liquid metal at a high temperature is poured

9. Shot Blasting and Secondary Processing

The parts are blasted to fully remove the sand and oxides. The casting part is then fully customized through grinding or additional heat treatments

10. 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

We are the most recommended foundry by any technical director

During this process, we work closely with our clients, giving them technical advice and support. We are also able of reverse engineering existing parts

Want to know more of INVESTMENT Casting

Investment casting, also known as lost wax casting, can produce steel casting parts with good surface quality and high accuracy in dimensions, and it is used to produce large numbers of high quality castings. Investment casting uses a wax copy of the component, dipped (invested) in a ceramic slurry to produce a ceramic mold. The wax is then removed to leave the ceramic shell, into which molten metal is poured.

 Patterns of the castings to be made are molded by injection of a special wax into a metal die. Cores of pre-formed ceramic may be incorporated into the wax patterns as they are molded. The patterns are assembled into a cluster (often comprising tens or even hundreds of patterns) around a wax runner system. The ‘tree’ of patterns is then coated with 8-10 layers of a refractory material, each layer being dried or chemically cured before the next layer is applied.

 The assembly is heated to remove the wax, then fired at high temperature to bond the refractory mold strongly. The hot mold is casted and when cooled the mold material is removed by impact, vibration, grit blasting, high pressure water blasting or chemical dissolution leaving the castings, which are then removed from the runner system.

investment casting

Industries and applications for investment casting

Our investment 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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