CERACOLD R 500

Product

CERACOLD R 500 series is a highly reactive process for making sand cores in foundry by cold box process. This process does not require heat to cure & form a sand bond. The curing mechanism is instantaneous, core get cured within few seconds. The basic of process of bonding is poly – urethane technology, hence it is very much sensitive with contamination of moisture by any means. The success of process depends on quality of sand, dryness of air & tooling.

This binder system is consists of three constituents

CERACOLD R – 501 & CERACOLD H – 510 are mixed with dry silica sand & mixed sand is cured within seconds, when CERACOLD C – 520 is passed in gaseous form through sand mixture.

Typical Properties of CERACOLD

Typical Sand Mix

Typical Tensile Strength & other Properties

These properties may vary with quality of sand & ambient conditions.

Core Making Process

CERACOLD process requires special core shooter with amine gas generator for making cores. Apart from core shooter, special precaution should be taken for dryness & cleanliness of air, which is used for blowing sand & for gas generator. The desired dew point of air is -40° C.

The prepared sand mixture is blown in the core box & gaseous CERACOLD C - 520 is passed through blown sand mass under controlled pressure & temperature. The excess

CERACOLD C – 520 is removed from core by purging dry & warm air. The core is stripped from core box immediately. The typical cycle time for core making is less than a minute.

The contamination of moisture from any source will detoriate the core quality.

Silent features of CERACOLD process

• Highest productivity than any other core making process.
• No heat is required for curing, so tooling may be in wooden, plastic, aluminium is possible.
• Excellent dimensional accuracy, since almost 100 % curing of core takes place in the core box.
• Cores are ready for assembly or usage immediately after stripping.
• Excellent surface finish of castings
• Excellent shake out properties.
• Low gas evolution, hence, less gas related defects in castings.
• Good resistance to casting defects like scab, veining or erosion.
• Suitable for all types of metal.

Mould & Core Paints

• Water base paints are suitable, but air dry type solvent base paints can be used.

Shelf Life

• Six month from the date of manufacture for all three resin components.