Flow control parts for cast houses, atomizing and casting lines, cast to the bore and seat they need.
A nozzle meters metal through one bore.
When that bore erodes, everything downstream changes.
Ceramic pour spouts that last in metal transfer combine three things: a material matched to the alloy, thermal shock resistance for every start, and a bore that is cast to size so it starts accurate and erodes slowly. Blasch makes nozzles, down spouts and pour spouts in OXYTRON and NITRON silicon carbide, fused silica, zirconia, aluminum titanate and alumina, with non-wetting grades that are easy to clean. The inlet is cast to seat a stopper rod for on and off or metering control.
Every pour starts with a thermal shock, when hot metal hits a nozzle that has cooled. Spalling at the inlet and erosion at the nose then widen the bore, and a wider bore changes flow rate, stream shape and, in atomizing, powder size.
Metal that wets the nozzle sticks and freezes, and the cleaning that follows wears the bore further.
So the life of a spout is decided by its material, by the accuracy of the bore when it is new, and by how slowly that bore grows.
A metering nozzle is a hole with ceramic around it, and every thousandth of an inch that the hole grows changes how much metal reaches the mold.
The Blasch process forms these details in the casting, without machining.
Tightly controlled bores and exits for the flow rate or powder size you need.
Inlet geometry for on and off or metering control with a mating rod.
Designs that keep a vortex from drawing slag and air into the stream.
Cast threads and angles for mounting, and sharp cast edges for fine powder and spraying.
| Material | Typical use |
|---|---|
| OXYTRON, NITRON silicon carbide | Aluminum and copper alloys, non-wetting |
| Aluminum titanate | Aluminum, low thermal expansion |
| Fused silica | Thermal shock in intermittent pouring |
| Zirconia | Nickel, cobalt and other high temperature alloys |
| Alumina | General metal transfer and atomizing |
Each material is tested in the Blasch lab for modulus of rupture, density, thermal shock, creep deflection, oxidation and wear. For new atomizing systems, FEA checks the stresses at temperature and CFD models the flow from tundish through nozzle and spout. Modeling and testing at Blasch
In the cast house for metal transfer, in continuous casting of non-ferrous metals, and in gas atomization, where the nozzle sets the stream that becomes powder. Ceramic atomizing nozzles cover the gas side of that system.
The spout usually sits at the end of a launder or tundish lining.
Yes. Nozzle seat and rod nose are cast to fit each other for accurate metering, in bottom pour crucibles and ladles.
Non-wetting OXYTRON or NITRON silicon carbide, or aluminum titanate. They are easy to clean and resist sticking metal.
No. The bore, the mounting and the alloy are enough to start. A Blasch engineer designs the part to fit your current or new casting system.
Send the bore, the mounting and the alloy. A Blasch engineer recommends the material and the nozzle geometry.
