Minimisation of binder and resin consumption

3 Moulding and core-making with chemically-bonded sand 4.3.3.1 Minimisation of binder and resin consumption 

The minimisation of chemicals consumption can be achieved through optimisation of the process controls and material handling. ITie latter category is dealt with in Section 4.1. In this 

Overuse to eompensate for poor process control is the most common way in which binder chemicals are wasted. For instance, key parameters that relate to good binder management include  

Sand consistency Use of a sand quality which is consistent with the binder system. Good management of sand storage and sand testing (purity, grain size, shape, moisture) are of the main importance. A low content of fines and maximum amount of re-used sand will reduce the amount of resin needed 

Temperature control The sand temperature must be maintained in a narrow range, with regular checks and adjustment of the amount of hardener addition. Positioning the sand heater just before the mixer allows close temperature control Mixer maintenance and cleaning 

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