Name: Riser Tube/Stalk Tube
Material: Silicon Nitride Appearance: gray
Moulding: cold isostatic pressing
Advantages: good thermal shock resistance
Application: low/counter pressure die casting
Certificate: ISO9001:2015
Common Size: OD90*ID60*L850-1050mm(customized available)
Delivery: common sizes in stock and deliver fast
Annual Supply Capacity: 20000pcs
Service Life: more than one year
Sintering: gas pressure sintering
Silicon nitride riser tubes are used in low pressure casting holding furnaces.
As a necessary parts for low pressure casting holding furnaces, riser tubes have undergone several generations of material "evolution". From metal materials to ceramic materials, from ordinary ceramic materials to composite ceramic materials, several major problems in the use of the riser were basically solved until the emergence of the silicon nitride riser:
1. Corrosion resistance: The riser tube made of metal is easily corroded in high-temperature metal solutions. Even if the riser of composite ceramics is used, such as the silicon carbide material, the corrosion is very serious. The service life is within 1--2 months.
2. Slag accumulation: The traditional liquid riser tube itself has a high porosity. After being corroded, it is easy to produce slag accumulation, which leads to narrowing or even blockage of the pipeline.
3. Ensure the purity of the product: After the traditional riser is corroded, impurities will be brought into the product, so the current metal riser will only be used in the production of low-end products; silicon carbide riser The impurity content also seriously affects the product quality and industrial upgrading. The silicon nitride has no pollution to the metal solution.
The riser tubes made of silicon nitride has high temperature resistance, low thermal expansion coefficient (less deformation), good sealing, smooth through holes, low porosity, no slag accumulation, no corrosion, and no impurities, which greatly improves quality of metal products. At the same time, the lifespan is more than one year, which improves the production efficiency and is cost-effective.
