COVEREX - 707
powder, which is applied to the feeder head. When the
exothermic reaction of the COVEREX-707
is complete, the burnt out materials
expands three times and has a strong insulating effect
which reduces heat loss by radiation. Used for all grades
of Iron and Steel castings / Ingots especially when feeder
heads indicate a requirement for a medium sensitivity
exothermic Anti-piping compound.
Anti-piping compounds are used to prevent the considerable
heat loss to atmosphere that can take place from uncovered
risers. As long as the surface of the open topped feeder
remains liquid, atmospheric pressure exerts its powerful
influence in the feeding of casting. Unfortunately often
it is lost when skulling of the metal acts as a barrier to
atmospheric pressure and the riser then, only has its own
gravitational mass to promote feeding.
Insulations Value At 40 min : 0-40-0-16 Cal/Cm²/Sec
Heat Loss at 20 min : 80 Cal/Cm²/Sec
Exothermicity 4 to 5 minutes
Temp. attained : 1600 to 1650°C
INSTRUCTIONS FOR USE
casting to within approximately 25mm of the riser.
required quantity of COVEREX-707
on the top of the riser so as to
provide a cover of about 25 mm in depth.
the exothermic reaction to proceed.
with more metal if necessary.
feeding hence sound castings.
applications COVEREX - 707
is supplied in ready for used
Reduction in scrap more that offsets small cost
Particularly useful where box parts or casting design
makes risering difficult.