ROBAR Capabilities Foundry CORE

Patterns • Molds • Melting • Core • Sand • Heat Treat • Coating • Light Forging • Rubber Gaskets




An important process in the production of iron, steel and brass castings begins with making the cores. Many castings do not require cores, but when cores are required, they must be made before the sand molds are made.

Cores are made from bonded sand. There are several methods for doing this, each with certain advantages and disadvantages.



ROBAR has three systems for core operations.

The first is a Pep-Set process in which the silica sand grains are bonded when two resins (mixed together with the sand) set or harden over time. This process is also called a Cold-Box process since no external heat is required. The Pep-Set is mixed in the Bepex machine. This process is quite versatile, and works well for small runs or large volumes.




Another process we use is Shell-Core. It is a Hot-Box process. Cores in this process are made by mixing thermo-set (heat set) resins with sand and applying heat. They are made in iron core boxes.

Core boxes are molds for the cores. The steel core boxes are heated with natural gas flames and the sand is injected into the box where it cures. This process is ideal for high production and detail work.

ROBAR is also uses the Ecolotek system. It runs on a Shalco U-180 machine that ROBAR has specially adapted.

It is another Cold-Box process that is both environmentally friendly as well as being suitable for high production. This process is good for high production runs or where fine detail is not required.

Patterns • Molds • Melting • Core • Sand • Heat Treat • Coating • Light Forging • Rubber Gaskets

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