Low Pressure Casting Solutions
Low-pressure casting provides a high-quality aluminum alloy casting solution: smooth filling, dense microstructure, and reliable performance.
- Low-pressure bottom-up filling significantly reduces porosity defects.
- High casting density and stable mechanical properties.
- Suitable for parts with high strength and reliability requirements.
- Good dimensional consistency and small machining allowances.
High-Quality Aluminum Casting for Complex and Structural Components
Low Pressure Casting (LPC) is an advanced metal casting process that uses controlled low pressure to force molten metal from a sealed furnace into a precision mold. This process delivers superior casting quality, excellent mechanical properties, and reduced porosity compared to conventional gravity casting.
Our low-pressure casting solutions are ideal for producing high-integrity aluminum components that require dimensional accuracy, structural strength, and consistent quality for demanding industrial applications.
From prototype development to mass production, we provide complete casting and secondary machining services tailored to your project requirements.
What Is Low Pressure Casting?
Low Pressure Casting is a manufacturing process in which molten metal is pushed upward into a mold cavity using controlled air pressure, typically ranging from 0.2 to 1.0 bar.
The metal fills the mold smoothly from the bottom upward, minimizing turbulence, oxidation, and gas entrapment.
This controlled filling process produces castings with:
- Improved density
- Reduced porosity
- Better mechanical properties
- Higher dimensional consistency
- Superior surface quality
- Increased yield rates
Why Choose Low Pressure Casting?
| Advantage | Benefit |
|---|---|
| Controlled Mold Filling | Reduced turbulence and defects |
| High Casting Integrity | Lower porosity and shrinkage |
| Excellent Mechanical Properties | Stronger and more reliable parts |
| High Material Utilization | Improved production efficiency |
| Better Surface Finish | Reduced post-processing requirements |
| Consistent Quality | Ideal for mass production |
| Complex Geometry Capability | Suitable for structural components |
Our Low Pressure Casting Capabilities
| Capability | Specification |
|---|---|
| Casting Process | Low Pressure Die Casting |
| Part Weight Range | 0.5 kg – 100 kg |
| Maximum Casting Size | Up to 1200 mm |
| Dimensional Tolerance | CT5 – CT7 |
| Surface Roughness | Ra 3.2 – 12.5 μm |
| Annual Production Capacity | 500,000+ Parts |
| Prototype & Production | Available |
| Secondary Machining | CNC Milling, Turning, Drilling, Tapping |
| Heat Treatment | T5, T6 Available |
| Leak Testing | Available |
Capabilities may vary depending on part geometry and alloy selection.
Available Materials
| Material Category | Common Grades |
|---|---|
| Aluminum Alloy | A356 |
| Aluminum Alloy | A357 |
| Aluminum Alloy | AlSi7Mg |
| Aluminum Alloy | AlSi10Mg |
| Aluminum Alloy | LM25 |
| Aluminum Alloy | AC4C |
| Aluminum Alloy | AC4CH |
| Customized Alloys | Available Upon Request |
Typical Low Pressure Cast Components
Low pressure casting is widely used for components requiring high structural integrity and mechanical performance.
| Component Type | Typical Application |
|---|---|
| Automotive Wheels | Passenger Vehicles |
| Suspension Components | Automotive Industry |
| Steering Components | Automotive Systems |
| Pump Housings | Industrial Equipment |
| Valve Bodies | Fluid Control Systems |
| Compressor Housings | Energy Equipment |
| Motor Housings | Industrial Machinery |
| Structural Brackets | Transportation Equipment |
| Lighting Components | Commercial Applications |
| Aerospace Components | Lightweight Structures |
Industries We Serve
| Industry | Typical Applications |
|---|---|
| Automotive | Wheels, suspension, chassis components |
| Aerospace | Lightweight structural castings |
| Railway | Structural and mechanical parts |
| Energy | Pump and compressor components |
| Industrial Equipment | Housings and machinery parts |
| Agricultural Machinery | Heavy-duty structural components |
| Marine | Corrosion-resistant aluminum castings |
| Construction Equipment | High-strength cast components |
Manufacturing Process
Step 1: Mold Design & Engineering
- Product design review
- Mold flow analysis
- Tooling development
- DFM optimization
Step 2: Mold Manufacturing
- Tool fabrication
- Precision machining
- Mold validation
Step 3: Low Pressure Casting
- Controlled metal filling
- Pressure regulation
- Solidification control
Step 4: Heat Treatment
- T5 heat treatment
- T6 heat treatment
- Mechanical property enhancement
Step 5: Secondary Machining
- CNC milling
- CNC turning
- Drilling and tapping
- Precision finishing
Step 6: Inspection & Testing
- Dimensional inspection
- X-ray testing
- Leak testing
- Mechanical property verification
Quality Control System
We implement strict quality control throughout the entire manufacturing process.
Inspection Capabilities
| Inspection Item | Inspection Method |
|---|---|
| Dimensional Accuracy | CMM Inspection |
| Internal Defects | X-Ray Testing |
| Porosity Analysis | Radiographic Inspection |
| Mechanical Properties | Tensile Testing |
| Hardness Testing | Brinell Hardness Test |
| Chemical Composition | Spectrometer Analysis |
| Leak Testing | Air & Water Pressure Testing |
| Surface Quality | Visual Inspection |
Mechanical Properties (Typical Aluminum Alloys)
| Property | A356-T6 |
|---|---|
| Tensile Strength | ≥ 260 MPa |
| Yield Strength | ≥ 180 MPa |
| Elongation | ≥ 5% |
| Hardness | 75–90 HB |
| Density | 2.68 g/cm³ |
Values may vary depending on alloy grade and heat treatment condition.
Surface Finishing Options
| Surface Treatment | Benefits |
|---|---|
| Shot Blasting | Surface cleaning and texture improvement |
| Sand Blasting | Uniform matte appearance |
| Powder Coating | Excellent corrosion resistance |
| Painting | Decorative and protective finish |
| Anodizing | Enhanced corrosion resistance |
| Chromate Conversion | Improved surface protection |
| Polishing | Enhanced appearance |
| CNC Finishing | Precision critical surfaces |
Production Capacity
| Item | Specification |
|---|---|
| Prototype Production | Available |
| Low Volume Production | 100–1,000 PCS |
| Medium Volume Production | 1,000–10,000 PCS |
| Mass Production | 10,000+ PCS |
| Sample Lead Time | 15–30 Days |
| Production Lead Time | 25–45 Days |
| OEM Service | Available |
| ODM Service | Available |
| Drawing Formats | STEP, STP, IGS, IGES, DWG, DXF, PDF |
Why Choose Our Low Pressure Casting Solutions?
Advanced Casting Technology Stable low-pressure casting systems ensure consistent product quality. Superior Mechanical Properties Reduced porosity and improved structural integrity compared to conventional casting methods. Integrated Manufacturing Services Casting, machining, heat treatment, finishing, and assembly under one roof. Strict Quality Assurance Comprehensive inspection procedures including X-ray and leak testing. Flexible Production Volumes Support from prototype development to high-volume manufacturing. Engineering Support Professional assistance with design optimization and cost reduction.
Frequently Asked Questions
What is the advantage of low pressure casting over gravity casting? Low pressure casting provides smoother mold filling, lower porosity, improved mechanical properties, and higher casting yields. What materials are commonly used in low pressure casting? Aluminum alloys such as A356, A357, AlSi7Mg, and AlSi10Mg are the most common materials. Can low pressure castings be heat treated? Yes. T5 and T6 heat treatment processes are commonly applied to improve strength and durability. Do you provide machining services after casting? Yes. We offer complete secondary machining, including CNC milling, turning, drilling, tapping, and precision finishing. Can you provide X-ray inspection reports? Yes. X-ray testing, leak testing, material certificates, and dimensional inspection reports are available upon request.
