Volute casting

As an established China-based casting specialist, Chongqing Sipx Machinery excels in precision volute casting production. Our engineering team leverages extensive industry expertise to deliver technically advanced volute casting solutions, ensuring optimal performance for demanding applications.

Equipped with automated foundry systems and rigorous quality controls, we guarantee high-integrity volute castings with efficient production timelines. Our commitment to end-to-end service includes collaborative design support and material compliance verification. Partner with us for reliable volute casting manufacturing that prioritizes dimensional accuracy and longevity. Contact our China team today to discuss project specifications and volume requirements.

Centrifugal casting stands as the industry-preferred method for manufacturing volute castings. This process utilizes high-speed rotational velocity during molten metal pouring, forcing material against mold walls to form precise hydraulic geometries. At Chongqing Sipx Machinery, our China-based facilities employ this technique specifically for complex volute casting production.

The centrifugal casting advantage for volute castings manifests in superior metallurgical properties: minimal porosity, controlled grain structure, and enhanced pressure containment capabilities. While alternative methods like investment casting or sand casting service certain applications, they typically deliver lower dimensional consistency compared to centrifugal processing – particularly for large-scale pump components requiring strict hydraulic tolerances.

As a specialized China foundry, we validate each volute casting through non-destructive testing to ensure structural integrity meets international standards. Our technical team provides material selection guidance and flow optimization service to match operational requirements. For volute projects demanding maximum fatigue resistance and leak-proof performance, centrifugal casting remains the technically optimal solution. Contact us for production feasibility analysis based on your pump specifications.

The volute material for a pump can vary depending on the application and preferences of the manufacturer. Some common materials used for casting volutes include:

1. Cast iron: This is a popular choice for iron casting manufacturers to make volutes due to its strength, durability, and cost-effectiveness. Cast iron volutes are suitable for a wide range of applications and can resist corrosion and wear.

2. Stainless steel: This is another popular material for volutes that require a high level of corrosion resistance. Stainless steel volutes are often used in environments that expose the pump to acidic or salty liquids.

3. Bronze: Bronze volutes are typically used when a pump needs to handle corrosive liquids, such as seawater. Bronze is an alloy of copper, tin, and sometimes other metals, and it offers good corrosion resistance and strength.

4. Aluminum: Aluminum volutes are often used in smaller, lightweight pumps. Aluminum is lightweight, durable, and resistant to corrosion, making it a good choice for some applications

This volute casting project features QT500-7 ductile iron components characterized by complex geometries, substantial dimensions (exceeding 1800mm diameter), and controlled wall thickness. Engineered for high-pressure fluid systems, these volute castings demand exceptional impact resistance and thermal stability to withstand operational stresses and impurity-laden media, necessitating rigorous metallurgical control throughout production.

Our China foundry specialists designed the volute casting process with precision:
• Mid-parting mold configuration accommodating structural complexity
• Semi-closed side gating system with horizontal pouring orientation
• Wet sand mechanical molding ensuring dimensional stability
Critical parameters including pouring temperature (1420-1460°C) and gating ratios were optimized through simulation to prevent turbulence defects. This systematic approach guarantees structural integrity for large-scale volute castings.

To eliminate potential defects like micro-cracks, we implement:

• 100% ultrasonic testing (UT) per EN 12680-3 standards

• High-temperature annealing (920°C ±10°C) for stress relief

• Ferritization treatment enhancing ductility
  The smelting process combines scrap steel with controlled carburization, followed by ladle-based nodularization and trough-inoculation techniques. With shakeout completed at 4916 seconds, each volute casting undergoes shot blasting and defect-free verification before heat treatment – demonstrating our comprehensive quality service from China.

1. Review of castings structure and spindle craftsmanship

Shape features: volute is the more common parts, the main feature is complex cavity, the total mass of parts is about 1972Kg, the size of 1652 * 1510 * 814mm, wall thickness is uniform, the main wall thickness is around 60mm. The parts are surrounded by four lugs with a wall thickness of 50 mm.

 

1.2 Part Structure Analysis

 

volute inner cavity structure is complex, difficult to type, internal lines are non-parametric curve, the design process to convert parameters curve, internal cavity to make a whole sand core, due to the large end of the air inlet, the position of the air inlet is easy to secure.

 

For casting craftsmanship, the castings are typed vertically along the inlet direction. However, Figure 1.2 location is not easy to die points, so it will increase certain material subsidies, without affecting the overall component structure. The specific additions are shown in Figure 1.2 below:

Figure1.2 the specific additions

 

2. Selection requirements for styling materials

Ductile iron cavity parts, the fluidity of ductile iron is higher, The coefficient of expansion and shrinkage are small, but the castings will have stomatal and shrinkage holes, shrinkage, etc., This will make the quality of the casting worse, so the selected sand, core sand should have a small amount of gas, strength meets the requirements.
When designing a process, the analysis and summary mainly need to synthesize the following aspects:

a. volute casting parts if the wall thickness is relatively thin, prone to pouring defects such as defects: if the casting is too thick and then causes the grains to become thick, shrink holes, white spots and other defects.

b. volute casting parts structure should not impede the flow of metal fluids. The thickness of the walls and the intersecting corners of the two walls should be highlighted. where each wall intersects, Transitions and transitions cannot be too straightforward. They can avoid various casting defects due to stress concentration.

c. volute casting parts need to be aware of internal and external wall thickness problems. In order to reduce various casting defects, the inner and outer walls of the casting should be cooled evenly. The outer wall of volute casting parts is better than the inner wall. So the outer wall should be thicker than the inner wall.