Sand-cast Aluminum Alloy Parts | Precision Custom Components for Multiple Industries
With over 10 years of experience as an integrated manufacturer and exporter specializing in aluminum alloy casting, we focus on the R&D and production of high-quality sand-cast aluminum alloy parts. Sand casting technology, as our core competitive process, enables us to produce complex-structured, cost-effective aluminum components that meet the diverse needs of global B2B clients. Our products are widely applied in automotive, construction machinery, new energy, and marine industries, delivering exceptional advantages such as lightweight, corrosion resistance, and excellent mechanical properties. Backed by a professional technical team, robust production capacity, and strict quality management system, we provide one-stop customization solutions from technical communication and mold development to global delivery, committed to becoming a reliable partner for international clients.
Product Overview: Sand-cast Aluminum Alloy Parts
Our sand-cast aluminum alloy parts are precision-customized components manufactured via advanced sand casting technology, suitable for complex structural parts that require high dimensional stability and cost-effectiveness. The core functions include load-bearing support, structural connection, and functional integration for various industrial equipment. Key products cover engine brackets, gearbox housings, pump bodies, valve manifolds, and custom structural components, all crafted from high-quality aluminum alloys (A356, A380, ADC12, 6061). Leveraging the advantages of sand casting—excellent adaptability to complex shapes, low mold development costs, and suitability for small-to-medium batch production—our parts feature uniform material structure, strong wear resistance, and perfect compatibility with subsequent machining processes. Meanwhile, we also supply matching cast iron or die-cast aluminum auxiliary components to meet comprehensive assembly needs of customers. All products comply with international quality standards, providing reliable quality guarantees for industrial operations.
Production Processes & Workflow
We adhere to a standardized and visualized production process, with sand casting as the core, to ensure the quality and precision of each aluminum alloy part. The core sand casting process includes:
1. Technical Demand Analysis & Design Optimization: Our professional engineers conduct in-depth communication with customers to clarify non-standard requirements (dimensional tolerance, structural complexity, working environment, performance indicators). Using CAD/CAM/CAE software, we perform 3D modeling and sand casting process simulation to optimize part structure, avoid shrinkage cavities and hot cracks, and improve casting feasibility while reducing production costs.
2. High-Quality Aluminum Alloy Selection & Inspection: Strictly select aluminum alloy materials with excellent sand casting performance and mechanical properties (A356, A380, ADC12, 6061) from authorized suppliers. Conduct comprehensive raw material testing, including chemical composition analysis (using spectrometer) and mechanical property detection (tensile test, hardness test), to ensure materials meet the performance requirements of target applications.
3. Sand Mold Making: Adopt high-quality resin sand or green sand for mold making, which features good collapsibility and surface finish. The mold core and cavity are manufactured by CNC machining or manual modeling (for complex special-shaped parts), with strict control of sand mold moisture content (≤2.5%) and compactness to avoid mold collapse and sand inclusion defects. For batch production, we use reusable mold frames to improve production efficiency.
4. Core Sand Casting Process: The molten aluminum (temperature controlled at 680-720℃) is poured into the sand mold under gravity. During pouring, we adopt step-by-step pouring technology to ensure uniform filling of molten aluminum and avoid turbulence. After pouring, we control the cooling rate of the mold to ensure slow and uniform solidification of the part, improving material density and reducing internal defects. The sand casting process is suitable for parts with complex structures, thick walls, and small-to-medium batch production.
5. Post-Casting Processing: After solidification, the part is demolded, and then undergoes sand cleaning (shot blasting, sand washing) to remove residual sand on the surface. Subsequently, processes such as gate cutting, trimming, and deburring are performed. For parts requiring high precision, precision machining is carried out using CNC lathes, milling machines, and grinding machines to meet the final dimensional tolerance requirements.
6. Targeted Surface Treatment: Provide diversified surface treatment options based on application environments and functional needs: anodizing (enhancing corrosion resistance and wear resistance), powder coating (improving scratch resistance and color uniformity), electrophoresis (achieving a smooth and delicate surface), and anti-rust painting (for harsh working environments). All surface treatments comply with environmental standards (RoHS certification).
7. Strict Full-Process Quality Inspection: Implement multi-level quality control throughout the production process. Key inspection links include: dimensional inspection (using Coordinate Measuring Machine, CMM) to ensure precision; non-destructive testing (ultrasonic testing, X-ray testing) to detect internal defects such as porosity and shrinkage; surface defect inspection (visual inspection + automated optical inspection) to eliminate sand inclusion and burrs; and mechanical property testing to verify tensile strength and hardness. Only products that pass all inspections can be delivered.
In addition to the core sand casting process, we also master advanced casting technologies such as die casting, gravity casting, and investment casting. These processes can be flexibly applied to different material (aluminum alloy, cast iron) and structural requirements of products, providing comprehensive production support for customers with diverse customization needs.
Product Classification & Technical Parameters
3D Classification Table (Industry / Material / Part Type)
Industry | Material | Part Type | Key Features | Remarks |
Automotive Manufacturing | A356 Aluminum Alloy | Engine Brackets, Gearbox Housings, Suspension Components | Lightweight, high strength, good shock absorption | Customizable for passenger cars and commercial vehicles |
Construction Machinery | A380 Aluminum Alloy | Hydraulic Pump Bodies, Valve Manifolds, Arm Supports | High load-bearing capacity, wear-resistant, corrosion-resistant | Suitable for harsh construction site environments |
New Energy (Wind/Solar) | 6061 Aluminum Alloy | Wind Turbine Generator Bases, Solar Inverter Housings | Excellent structural stability, weather-resistant, lightweight | Meet new energy equipment environmental adaptation requirements |
Marine Industry | ADC12 Aluminum Alloy / HT250 Gray Cast Iron | Marine Pipeline Connectors, Ship Engine Accessories, Deck Supports | Corrosion-resistant to seawater, high structural strength | Matching cast iron parts for enhanced stability |
Technical Parameter Table
Parameter Item | Specification |
Machining Precision | ±0.05mm (for key dimensions), ISO 8062 Grade H8; Sand casting surface roughness Ra≤3.2μm |
Material Range | Aluminum Alloy: A356, A380, ADC12, 6061, 5052; Cast Iron: HT150, HT200, HT250, QT400-18, QT450-10 |
Surface Treatment Options | Anodizing, Powder Coating, Electrophoresis, Shot Blasting (SA2.5 standard), Anti-Rust Painting, Polishing |
Minimum/Maximum Dimensions | Minimum: 50mm × 30mm × 20mm; Maximum: 2000mm × 1500mm × 800mm |
Production Cycle | Sand mold development: 5-12 working days; Small-batch customization (≤300pcs): 12-20 working days; Large-volume production (>300pcs): 18-30 working days (depending on product complexity) |
Our Core Competitiveness
As a professional manufacturer of sand-cast aluminum alloy parts with over 10 years of experience, we have formed a comprehensive competitive advantage to serve global B2B customers:
• Professional Technical Team: A team of 35+ professional engineers and technicians, with rich experience in sand casting process design, complex part structure optimization, and quality control. We can provide professional technical solutions for non-standard customization and respond to technical consultations within 24 hours.
• Strong Production Capacity: Our factory covers an area of 8,000 square meters, equipped with 40+ sets of advanced production and testing equipment (sand mold making lines, high-temperature melting furnaces, CNC machining centers, CMM, ultrasonic testing machines). The annual production capacity of sand-cast aluminum alloy parts and matching cast components reaches 30,000 tons, capable of meeting large-volume and urgent order requirements.
• Strict Quality Management System: Certified by ISO 9001:2015, CE, and RoHS. We implement 12+ key quality inspection points throughout the production process, from raw material incoming to finished product delivery, ensuring the product qualification rate reaches 99.8% and fully complying with international quality and environmental standards.
• Perfect Supply Chain: We have established long-term and stable cooperative relationships with 10+ well-known aluminum alloy and cast iron raw material suppliers, ensuring the stable supply and consistent quality of raw materials. Optimized supply chain management reduces production costs and shortens delivery cycles.
• Global Shipping Support: Cooperate with 5+ international logistics companies (Maersk, COSCO, MSC) to provide flexible trade terms (FOB, CIF). Our products have been exported to 150+ countries and regions around the world, with an on-time delivery rate of 99%.
• Comprehensive Quality Assurance Service: Provide a 12-month quality guarantee period for all sand-cast aluminum alloy parts. We also offer lifelong after-sales technical support, including installation guidance and product maintenance advice.
Why Choose Us for Sand-cast Aluminum Alloy Parts?
Choosing us as your sand-cast aluminum alloy parts supplier means you gain a reliable partner that deeply understands the characteristics of sand casting technology and industrial customization needs. Here are the core reasons for cooperation:
• Professional Sand Casting Customization Capability: We focus on sand casting technology, with mature experience in producing complex-structured aluminum parts. We can optimize the casting process according to the structural characteristics of your products, balancing precision, cost, and production efficiency.
• Superior Product Quality & Authority Certification: Strict raw material inspection, full-process quality control, and international certifications ensure that our sand-cast aluminum parts are reliable and durable, avoiding quality risks in your production and operation.
• Efficient Production & Flexible Delivery: Advanced sand mold making technology and strong production capacity enable us to complete small-to-medium batch customization orders efficiently. Flexible delivery plans can be formulated according to your project progress, ensuring no delay in your production schedule.
• One-stop Global Service: Our professional foreign trade team provides full-process services from order confirmation to after-sales, including document preparation, customs clearance guidance, and logistics tracking. Global logistics partners ensure smooth delivery of products to your designated location.
• Long-Term Win-Win Cooperation Concept: We adhere to the principle of mutual benefit and win-win, providing competitive prices based on large-scale production advantages. We will continuously optimize products and services according to your feedback, growing together with your business.
Common Sand Casting Problems & Solutions
Common Problems | Causes | Solutions |
Sand inclusion on part surface | Poor sand mold surface quality, excessive sand moisture, improper pouring speed | Improve sand mold compactness and surface finish; control sand moisture content (≤2.5%); optimize pouring speed to avoid sand washing |
Internal porosity and shrinkage | Insufficient degassing of molten aluminum, unreasonable gating system, uneven cooling | Add degassing agents to molten aluminum and adopt rotary degassing technology; optimize gating system design to ensure smooth molten metal flow; set up risers to supplement shrinkage and adopt gradient cooling |
Dimensional deviation exceeding tolerance | Sand mold deformation, thermal expansion and contraction during casting, machining errors | Use high-strength molding sand and reinforce the sand mold; control casting cooling speed to reduce thermal deformation; use CMM for full-dimensional inspection during machining and set up secondary correction procedures |
Poor surface finish | Rough sand mold surface, residual sand not cleaned thoroughly | Polish the sand mold inner surface; strengthen post-casting sand cleaning process (shot blasting + manual cleaning); optimize shot blasting parameters to improve surface smoothness |
Contact Us
If you need sand-cast aluminum alloy parts or have non-standard customization requirements for aluminum alloy/cast iron cast components, please feel free to contact us. You can send us your drawings, technical specifications, or application scenarios, and our professional team will reply to you within 24 hours, providing detailed technical solutions and quotations. We look forward to establishing long-term and stable cooperative relationships with you and creating win-win results together!
