RENDEX POWDER

Rend – X Powder (Break - Down/Collapsible Agent for CO2 Process)

It is necessary that core sand, made by the Sodium Silicate process should have good break-down properties so that the cores collapse easily after the solidification of the casting.

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characteristics and features

REND-X is a break down agent which is supplied in either liquid or powder form.
In the case of cores made by the Sodium Silicate process, Silicate forms a firm bond when the casting is poured and this bond creates problems while de-coring of casting. As soon as the castings are poured some residual water is driven off due to the temperature, and the bond gets strengthened. When temperature increases beyond 900°C, the bond tends to fuse. REND-X acts as a non-fusible parting media and prevents the sand grains from commenting together and thus helps release the core sand.

types available & method of using

REND-X POWDER (for Non-ferrous / Cast Iron):

Recommended addition is 1 to 2 percent by weight of sand. REND-X is to be mixed with dry sand in a mixer, followed by the addition of a Silicate binder. This procedure ensures thorough mixing and dispersion of REND-X Powder.

REND-X M LIQUID (for Cast Iron):

0.5 percent to 1 percent REND-X Liquid by weight of dry sand is to be added and mixed for two minutes. To this mixture a proportionate quantity of Silicate binder is added and mixed for three minutes. The liquid is non-toxic. Powder being in liquid form gives better coating and also permeability which works magnificently during knock-off.

REND-X M POWDER (For Steel Castings):

As Silicate cores have to face higher temperatures, this formulation has been developed which gives collapsibility even at a higher temperatures.

advantages of Rend – X Powder

  • Easy addition.
  • No friability.
  • No blowing of the core.
  • Excellent break-down properties.
  • Improved surface finish.
  • No change in core surface hardness.
  • No deterioration in the physical properties of gassed cores.

Storage

Store in a dry place

Shelf Life

12 months from the date of manufacture.

Packing

Powder: 50 Kg Arkalline Bags
Liquid: 200 Kg Barrel