FOREX-HTC / APC
FOREX-HTC :-Exothermic Anti Piping Compound /APC Powder or also termed as Hot-Topping Compound
Function:-In case of pouring liquid metal in the mould, casting cools at a slower rate then riser metal. While cooling Casting metal shrinks & the metal is needed from the riser.But the riser metal is cooling at a faster rate.Hence to keep riser metal in the liquid form for feeding the Casting FOREX-HTC is used. The moment riser is filled with the metal.
FOREX-HTC is spread over the riser surface. FOREX-HTC starts burning after few seconds. The activity count of 65 is adjusted so as to generate heat & keep riser metal hot at a latter stage. FOREX-HTC swells and provides a insulating layer to retain the heat generated & helps in feeding and casting. FOREX-HTC is recommended for all riser sizes above 3 Degree and heavy castings.
| Riser size | ADDITION (GMS) | Riser size | ADDITION (GMS) |
|---|---|---|---|
| 1° | 10 | 10° | 650 |
| 2° | 30 | 12° | 1400 |
| 3° | 60 | 14° | 1900 |
| 4° | 100 | 16° | 2500 |
| 5° | 160 | 18° | 3150 |
| 6° | 230 | 20° | 3900 |
| 8° | 410 | 22° | 4700 |
The heat generated during the exothermic reaction keeps the metal in liquid state for a longer period. The swelling property of FOREX-HTC provides insulation from the top to avoid radiation losses. No effect if stored in dry place25/50 Kg HDPE bags/Plastic pouch 2/5 Kgs.