Product Description

Hot Product :

Production Parameter:

Specification Customized as drawing or sample
Part Weight 0.5KG-20KG
Casting Standard JIS,ASTM,DIN,GB
Casting Tolerance CT8~9(IS0 8015)
Surface Roughness Ra 12.5
Casting Material A356, A365.2, Al-Si10Mg
Casting Process Gravity Casting, Low-pressure Casting, Tilting casting
Surface Preparation Shot-blasting, Painting, Electroplating, Electrophoresis
Inspection Equipment Metallographic Inspection, Spectrum Detection, MTS Tensile test, Brinell hardness Test, XRay Detection, Magnetic Particle Detect, CMM, Gauge, 3D ScHangZhou
Dimension Inspection Coordinate Measuring Machine (CMM),Calipers, Height Gauge, Micrometer Calipers,  Inside Caliper Gauge, Angle and R Gauge,Customized Gauge, etc.
Product application 100%+ Auto parts for passenger cars and commercial vehicles
Lead Time 45 Days for Aluminum Casting

A356 Aluminum  Double-Fork-Arm Rear Steering Knuckle Castings for NEV Leader BYD Song Dynasty SUV in Chinese Market


Production Process 

Quality Control:

1) Checking the raw material —- Incoming quality control ( IQC)
2) Pre-shift checking—-Machine parameter condition and tooling preparation
3) Auto feeding, Error proofing and  temperature control —-Spheroidizing process
4)  Sand Preparation—- Moisture, Air permeability, Strength control and online Inspection
5) Pouring process- Starting and ending control of temperature, time and chemical compisition
6) Nodularity Inspection—- 1 time / Ladle
7) Auto grinding
8)100% Audio frequency Inspection for material non-conformity
9)100% Appearance checking
10)100% Gauge Inspection
12) Laser Coding for machined parts as customer request

Our Factory

 • Established in 1970, HangZhou Xihu (West Lake) Dis. Machinery Co., Ltd has a  long history in the foundry field.
• Being a world leading professional Auto parts manufacturer, focus on Iron casting, Aluminum casting and Parts machining, produces more than   100  thousand tons for Iron castings and 6 thousand tons of Aluminum castings annually for OEM.
• Leading products are Automotive Braking System (safety parts), Engine System, Transmission System, and High-speed rail, subway track shock  absorber castings.
• 90%+ Auto parts for passenger cars and commercial vehicles.
• ISO 9001, IATF 16949, ISO 14001, OHSAS 45001 certificated.
• Green Manufacturer by CFA.
• Our Tier 1 customers are main for Akebono Brake,Hitachi Astemo, Mobis, Mando Advics , ZF, Brembo, Schaeffler, Mahle, Hidria, Chassix,  Concentric, BWI,  Bethel, Wanxiang Group, APG.
• Long-term supply for BMW, Volkswagen, Nissan, Fiat Chrysler, GM, Honda, Mazda, Suzuki, Geely, Chery, CHINAMFG Auto, CHINAMFG group, BAIC  group  and other domestic and foreign mid-to-high-end vehicles.

Our Certifications



Packaging & Shipping

Exhibition Show

Customer Visit


Q1: Are you a manufacturer or a trading company?
A1: HangZhou Xihu (West Lake) Dis. is 1 of the largest professional manufacturers of Chassis System (brake caliper, brake support, steering knuckle), Engine System(engine block, engine cover, intake manifold and so on), Transmission System(forkshift, control arm), and subway track shock absorber castings and other products.

Q2: What certifications do you have?
A2: IATF16949, ISO14001, ISO45001, etc. 

Q3: How about your lead time?
A3: For casting(Iron)+machining sample during OTS phases, it usually takes about 35 days to prepare at our facility after joint confirmation of tooling 3D;
For casting(aluminum)+machining sample during OTS phases, it usually takes about 60 days to prepare at our facility after joint confirmation of tooling 3D.
For mass production order, it usually takes about 4-6 weeks to prepare at our facility. Of course, it depends on quantity of order, we believe that we can give a satisfied delivery performance.

Q4: Which customers do you supply parts to?    
Our Tier 1 customers include: 

1) Japanese and South Korea Company: Akebono Brake Industry, CHINAMFG Astemo, Mobis, Mando Advics etc.

2) European Company: ZF, Brembo, Schaeffler, Mahle, Hidria etc.

3) American Company: Chassix, Concentric; 

4) Chinese Local: Bethel Automotive Safety Systems Co., Ltd, BWI, HangZhou Universal Machinery(GROUP) Co., Ltd., Wanxiang Group, APG etc.

2. Our OEM customers include: 

Chinese Local: FAW, BAIC, BYD etc.

3. Our products have been applied to BMW, Toyata, Volkswagen, Nissan, FIAT Chrysler, GM, Mazda, Suzuki, Mitsubishi, BYD, Geely, Chery, CHINAMFG Auto, CHINAMFG group, BAIC group and other domestic and foreign MID-to-high-end vehicles. 

Q5:Which countries have your parts exported to?
A5: Products are mainly exported to Japan, Malaysia, Indonesia, Thailand, USA, Argentina, Slovenia, Germany and other overseas countries. 

Q6: Which in-co-term have you deal with?
A6: EXW, FOB, CIF, DAP and so on.

Q7: Can you make casting according to our drawing or samples?
Yes, we can make casting according to your drawing, 2D drawing, or 3D cad model. If the 3D cad model can be supplied, the development of the tooling can be more efficient. But without 3D, based on 2D drawing we can still make the samples properly approved.
Yes, we can do 3D scHangZhou on your samples to get the sample 3D model and then  make drawings for tooling making.

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Die Casting Machine Type: Hot Chamber Die Casting Machine
Die Casting Method: Low Pressure
Application: Auto Parts
Machining: CNC Machining
Material: Aluminum Alloy
Surface Preparation: Polishing
US$ 5.5/kg
1 kg(Min.Order)




cast aluminium

What design considerations are there when working with cast aluminium?

When working with cast aluminium, several design considerations should be taken into account to ensure successful and efficient manufacturing. Here’s a detailed explanation:

1. Wall Thickness: Maintaining uniform wall thickness is crucial in cast aluminium design. Thick sections can lead to slower solidification, increased porosity, and potential shrinkage defects. Conversely, excessively thin sections may result in poor mold filling and insufficient mechanical strength. Design guidelines should be followed to optimize wall thickness and ensure proper solidification during casting.

2. Corner Radii and Fillets: Incorporating generous corner radii and fillets in cast aluminium designs helps minimize stress concentration and prevent the formation of sharp edges. Smooth transitions between wall sections, ribs, and bosses improve the overall strength and integrity of the casting.

3. Draft Angles: Draft angles are necessary to facilitate the removal of the casting from the mold. Adequate draft angles allow for smooth ejection, reducing the risk of damage to the casting and ensuring consistent production. Typically, a minimum draft angle of 1-3 degrees per side is recommended for cast aluminium parts.

4. Rib Design: Ribs are often used to provide additional strength and rigidity to cast aluminium components. Designing ribs with proper thickness, height, and filleting helps prevent distortion and ensures effective heat dissipation during casting and subsequent use.

5. Undercuts and Core Pulls: Complex cast aluminium designs may require the use of cores or slides for creating undercuts or internal features. These features should be designed with care to allow for easy removal of the casting from the mold. Proper consideration of core placement, shape, and release mechanisms is essential to avoid casting defects and ensure smooth production.

6. Parting Line: The parting line is the interface where the two halves of the mold meet. It is important to carefully consider the location of the parting line to minimize the need for additional machining and to ensure good dimensional accuracy. The parting line should be strategically placed to avoid critical features and maintain the overall integrity of the casting.

7. Surface Finish and Texture: Cast aluminium parts often require specific surface finishes and textures for both functional and aesthetic purposes. Design considerations should be given to the desired surface finish, such as smoothness, textures, and the location of parting lines, to achieve the desired appearance and performance of the final product.

8. Material Selection: The selection of the appropriate aluminium alloy for the specific application is crucial. Different aluminium alloys have varying mechanical properties, corrosion resistance, and casting characteristics. Understanding the requirements of the part and selecting the suitable alloy will ensure optimal performance and cost-effectiveness.

9. Tolerances and Machining Allowances: Design tolerances and machining allowances should be carefully defined to accommodate the expected dimensional variations during casting and post-casting processes. It is essential to consider the shrinkage and distortion tendencies of cast aluminium and provide appropriate tolerances to achieve the desired fit and functionality of the final assembly.

10. Testing and Prototyping: Testing and prototyping are essential steps in the design process for cast aluminium parts. Physical prototypes and computer simulations can help identify potential issues, validate the design, and optimize the casting process before full-scale production. Performing thorough testing and evaluation ensures the final design meets the required performance and quality standards.

By considering these design considerations, engineers and designers can optimize the manufacturability, functionality, and performance of cast aluminium components. Collaboration between designers, casting experts, and manufacturers is often valuable to ensure the best outcomes in terms of cost, quality, and efficiency.

cast aluminium

What types of finishes can be applied to cast aluminium?

Cast aluminium can be finished with various types of coatings and finishes to enhance its appearance, protect it from corrosion, and provide additional durability. Here are some common types of finishes that can be applied to cast aluminium:

  • Paint:
  • Painting is a popular finishing option for cast aluminium. It allows for a wide range of color choices and can be used to achieve different textures and finishes, such as matte, glossy, or metallic. Paint provides both aesthetic appeal and a protective layer to shield the aluminium from environmental factors.

  • Powder Coating:
  • Powder coating is a dry finishing process where a fine powder is electrostatically applied to the cast aluminium surface. The powder adheres to the metal and is then cured under heat, forming a durable, uniform, and smooth coating. Powder coating offers excellent corrosion resistance, impact resistance, and color options, making it a popular choice for outdoor furniture, automotive parts, and architectural applications.

  • Anodizing:
  • Anodizing is an electrochemical process that creates a controlled oxide layer on the surface of aluminium. It enhances the natural corrosion resistance of aluminium and provides a more durable finish. Anodized finishes can range from clear or natural to various colors, depending on the type of anodizing process used. Anodized cast aluminium is commonly used in architectural applications, electronics, and consumer goods.

  • Polishing:
  • Polishing is a mechanical finishing process that creates a smooth, reflective surface on cast aluminium. It involves using abrasives and polishing compounds to remove imperfections and scratches, resulting in a shiny and lustrous finish. Polished aluminium can be left untreated for a bright, metallic appearance, or it can be further coated or protected with clear lacquer or wax.

  • Brushed or Satin Finish:
  • A brushed or satin finish is achieved by brushing the surface of cast aluminium with abrasive materials or using mechanical techniques. This creates a textured, matte finish with visible brush marks. Brushed or satin finishes are commonly used in architectural applications, decorative elements, and furniture.

  • Antique or Patina Finish:
  • An antique or patina finish is designed to give cast aluminium a weathered or aged appearance. This finish is achieved through chemical treatments or special coatings that create an oxidized or tarnished effect on the surface. Antique finishes are often used in decorative pieces, art, and furniture to add character and vintage appeal.

The choice of finish for cast aluminium depends on the desired aesthetic, functional requirements, and the intended application of the product. Different finishes offer varying levels of protection, durability, and visual effects, allowing for customization and versatility in the use of cast aluminium.

cast aluminium

What are the advantages of using cast aluminium in manufacturing?

Using cast aluminium in manufacturing offers several advantages. Here’s a detailed explanation:

  • Lightweight:
  • Cast aluminium is lightweight compared to other metals, such as steel or iron. This property makes it an ideal choice for applications where weight reduction is crucial, such as in the automotive and aerospace industries. The use of cast aluminium components can contribute to improved fuel efficiency, increased payload capacity, and enhanced overall performance.

  • Strength-to-Weight Ratio:
  • Although cast aluminium is lightweight, it exhibits excellent strength-to-weight ratio. It provides sufficient structural strength and rigidity for many applications while keeping weight to a minimum. This property makes it suitable for applications requiring strength and durability, such as in the construction of machinery, vehicles, and structural components.

  • Corrosion Resistance:
  • Aluminium naturally forms a protective oxide layer on its surface, which provides inherent corrosion resistance. This oxide layer helps prevent rusting and corrosion, making cast aluminium components suitable for outdoor or corrosive environments. Additionally, aluminium can be further enhanced with coatings or finishes to improve its corrosion resistance and prolong its lifespan.

  • Malleability and Versatility:
  • Cast aluminium is highly malleable, allowing it to be easily shaped and formed into complex designs and intricate details. This versatility opens up a wide range of possibilities for manufacturing intricate components, decorative elements, and custom designs. Cast aluminium can be used to create aesthetically pleasing and functional products across various industries.

  • Excellent Thermal Conductivity:
  • Aluminium has excellent thermal conductivity, meaning it efficiently transfers heat. This property makes cast aluminium components suitable for applications where heat dissipation is critical, such as in heat sinks, cooling systems, or electronic enclosures. The high thermal conductivity of aluminium helps dissipate heat and maintain optimal operating temperatures.

  • Recyclability:
  • Aluminium is highly recyclable without losing its inherent properties. Recycling cast aluminium requires significantly less energy compared to primary aluminium production. The recyclability of cast aluminium makes it a sustainable choice, reducing the demand for primary aluminium and minimizing environmental impact.

  • Cost-Effectiveness:
  • Cast aluminium manufacturing processes are often cost-effective compared to other metal manufacturing methods. The relatively low melting point of aluminium reduces energy consumption during casting, and the lightweight nature of aluminium reduces transportation costs. Additionally, the recyclability of aluminium contributes to cost savings in the long run.

These advantages make cast aluminium a popular choice in various industries, including automotive, aerospace, construction, electronics, and consumer goods. However, it is important to consider specific application requirements, such as load-bearing capacity, temperature resistance, and surface finish, to determine the suitability of cast aluminium for a particular manufacturing project.

China manufacturer A356 Aluminum Double-Fork-Arm Rear Steering Knuckle Castings  China manufacturer A356 Aluminum Double-Fork-Arm Rear Steering Knuckle Castings
editor by CX 2024-04-11