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Aluminum Titanate Riser Tube For Low Pressure Die Casting Machine

Riser tube has the ability of low coefficient of thermal expansion, good thermal shock resistance, and non-wetting by molten aluminum.

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Introduce

Riser tube is one of the key components of antigravity casting. When filling the mold, under the action of air pressure, the molten metal enters the mold from the crucible through the riser tube. When the pressure is released, the unsolidified molten metal also flows back into the crucible through the riser tube. As an important component in the gating system, the riser tube has the functions of diversion and feeding. It should have air tightness, chemical inertness and stability and reliability of the antigravity casting. It plays a vital role in the anti-gravity casting process. Therefore the riser tube must have the ability of low coefficient of thermal expansion, good thermal shock resistance, and non-wetting by molten aluminum. Aluminum titanate with these properties is one of the good choices.

Advantages

1,Excellent thermal shock resistance
2,No infiltration with the non-ferrous metal
3,Excellent wear resistance
4,Low thermal-expansion coefficient5. Low mechanical stress

Data Sheet

Item	Riser tube	Sprue bush
Al2O3%	50-55	50-55
TiO2%	40-45	40-45
Fe2O3%	≤0.2	≤0.2
K2O+Na2O%	≤0.02	≤0.02
Density(g/cm3)	＞3.4	＞3.4
Heat conductivity (W/m.k)	0.86-1.00	0.86
Flexural strength (Mpa)	30-35	30-35
Porosity (%)	＜8	＜8
Max. Working temperature （℃）	＜1400	＜1400