Mastering Die Casting – How to Manufacture Successfully in China

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China’s Die-Casting production has skyrocketed in the past. With its unique market and cost advantages in resources and labor, China has experienced rapid development in the Die-Casting industry in recent years. This has positioned the country as a global leader in international casting trade, offering exceptional value for money. Furthermore, the industry’s escalating demands and unprecedented opportunities have led to a significant increase in die-cast product volume.

As the automobile industry continues to flourish, the demand for Die-Casting has become especially critical. Lightweight components are vital for achieving energy-saving and emission-reduction goals in the automotive sector. China’s growing vehicle market makes the advantages of aluminum die casting in lightweight increasingly prominent. Aluminum offers remarkable benefits in terms of fuel efficiency, emissions reduction, and overall vehicle performance, making it the preferred choice for Die-Casting in automobiles.

Key Takeaways:

  • The Die-Casting industry in China has rapidly developed and is now the second largest in the world
  • The automotive industry’s demand for lightweight components has fueled the growth of Die-Casting in China
  • Following recommended steps and implementing measures can lead to successful Die-Casting manufacturing in China


How does Pressure Die-Casting work?

Pressure Die-Casting is a process where molten metal is forced into a mold cavity under high pressure. This process is often used for casting metals with a high melting point, such as aluminum, zinc, and copper. The pressure forces the molten metal into the mold cavity, where it cools and solidifies.

The Pressure Die-Casting process begins with melting the metal in a furnace. The molten metal is then poured into a chamber called a shot sleeve, where it is kept under high pressure. A plunger then forces the molten metal into the mold cavity at high pressure. The metal cools and solidifies in the mold, and the casting is then ejected from the mold.

The Pressure Die-Casting process offers several advantages over other casting processes, such as sand casting and investment casting. Pressure Die-Casting provides better dimensional accuracy and a smoother surface finish. The process is also capable of producing complex shapes that would be difficult to produce with other methods.

Despite these advantages, pressure die casting has some challenges that must be overcome in order to be successful. One of the biggest challenges is ensuring that the molten metal flows evenly into the mold cavity. If the metal does not flow evenly, the casting will have voids or other defects.

Another challenge is preventing the metal from cooling too quickly in the mold cavity. If the metal cools too quickly, it will not have time to fill the mold completely and will produce an incomplete casting.

To overcome these challenges, it is important to work with a Die-Casting company that has experience in manufacturing high-quality castings. At LK MOULDS, we have over 24 years of experience in Pressure Die-Casting and have manufactured over 1 billion castings for our customers. We have the knowledge and experience to successfully manufacture your parts in China.

If you are interested in learning more about Pressure Die-Casting or our other services, please contact us today.


The Importance of Die Casting in the Automobile Industry

The automobile industry is experiencing a growing demand for die casting, driven by the need for lightweight components that contribute to energy-saving and emission-reduction goals. As the number of vehicles on the roads continues to rise, achieving fuel efficiency and reducing emissions becomes crucial. This is where Die-Casting plays a vital role.

Die-Casting, especially with aluminum, offers remarkable advantages in the automotive sector. The lightweight nature of aluminum components enhances overall vehicle performance by improving fuel efficiency and reducing emissions. This material also provides excellent strength-to-weight ratio, corrosion resistance, and dimensional stability. These qualities make die casting the preferred choice in the automobile industry for manufacturing various components such as engine blocks, transmission parts, and structural components.

According to a report by MarketsandMarkets, the global automotive Die-Casting market is projected to reach $11.86 billion by 2025, with a compound annual growth rate of 8.8%. This growth is driven by increasing vehicle production, stringent emission regulations, and the demand for lightweight and fuel-efficient vehicles.

The Advantages of Die-Casting in the Automobile Industry

  • Weight reduction: Die-Cast components are lighter compared to traditional manufacturing methods, which helps improve fuel efficiency and reduce emissions.
  • Cost-effective production: Die-Casting allows for high production volumes and faster cycle times, resulting in cost savings for manufacturers.
  • Design flexibility: Complex shapes and intricate details can be achieved through die casting, enabling innovative and optimized designs.
  • Durability: Die-Casting components offer excellent mechanical properties, ensuring long-lasting performance in demanding automotive applications.

With the growing importance of sustainability and fuel efficiency in the automobile industry, Die-Casting provides a reliable solution for manufacturers to meet these challenges. By harnessing the benefits of die casting, car makers can produce lightweight, energy-efficient vehicles that meet the demands of modern consumers.

Engine blocksAluminumExcellent heat dissipation, reduced weight, improved fuel efficiency
Transmission partsMagnesiumLightweight, high strength-to-weight ratio, reduced noise and vibrations
Structural componentsAluminumHigh strength, corrosion resistance, excellent dimensional stability


What machines are used for Die-Casting?

Die-Casting machines are typically categorized by the tonnage of the clamping force they provide. The required tonnage depends on the size of the part being cast. Smaller machines (2–4 tons) are used for small-sized parts, while larger machines (15–2,000 tons) are needed to produce larger parts.

The die-casting process consists of four main steps:

  1. Injection,
  2. Cooling,
  3. Ejection,
  4. Degating.

Injection: The first step in the die-casting process is the injection of molten metal into the mold cavity. This is accomplished by a screw-type plunger which injects the metal under high pressure into the mold.

Cooling: The injected metal then begins to cool and solidify. The cooling process is controlled by regulating the injection speed and temperature of the molten metal.

Ejection: Once the part has cooled and solidified, it is ejected from the mold cavity by hydraulic cylinders.

Degating: The final step in the process is the removal of the gates and runners which transport the molten metal to the Cavity.

How to make a Die-Casting Mold?

There are three main steps in making a Die-Casting Mold:

1. Designing the Mold

The first step is to design the mold. This involves creating a 3D model of the desired part. The model is then used to create the mold cavity, which is the negative space that will be filled with metal.

2. Machining the Mold

Once the mold cavity has been created, it needs to be machined. This step involves using various tools to cut, drill, and grind the mold cavity to the correct size and shape.

3. Finishing the Mold

The last step is to finish the mold. This involves adding any final touches, such as polishing the surface or adding drainage holes. Once the mold is finished, it is ready to be used.


Steps to Successfully Perform a Pre-shipment Inspection

Performing a pre-shipment inspection (PSI) is a crucial step in maintaining quality control when sourcing products from China. To ensure a successful PSI, there are several key steps that need to be followed.

Step 1: Review Specifications

Before scheduling the inspection, it is essential to thoroughly review the product specifications to ensure a clear understanding of the requirements. This includes the quality standards, technical specifications, and any other specific criteria that the products must meet.

Step 2: Schedule the Inspection

Once the specifications have been reviewed, the next step is to schedule the inspection with the manufacturer. It is important to communicate the inspection date and time well in advance to ensure that the manufacturer can make the necessary arrangements.

Step 3: Prepare Necessary Documents and Tools

Prior to the inspection, it is crucial to gather all the necessary documents, such as the purchase order, product specifications, and any other relevant paperwork. Additionally, prepare the required tools and equipment for conducting the inspection, including measuring devices, sample testing equipment, and any specialized tools specific to the product.

Step 4: Conduct On-site Inspections

On the day of the inspection, it is important to conduct thorough on-site inspections at the manufacturer’s facility. This includes visually inspecting the products, conducting sample testing, and verifying the quality and compliance with the specified requirements. Pay close attention to areas that are prone to defects or non-compliance.

Step 5: Report the Inspection Results

After completing the inspection, it is crucial to generate a comprehensive inspection report that clearly outlines the findings. The report should include details of any defects or non-compliance observed during the inspection, along with supporting evidence such as photographs or test results. Providing this report to the buyer ensures transparency and enables informed decision-making regarding the shipment.

Step 1: Review SpecificationsThoroughly review the product specifications to understand the requirements.
Step 2: Schedule the InspectionCommunicate the inspection date and time with the manufacturer.
Step 3: Prepare Necessary Documents and ToolsGather all relevant documents and prepare the required inspection tools.
Step 4: Conduct On-site InspectionsPerform detailed on-site inspections, including visual checks and sample testing.
Step 5: Report the Inspection ResultsGenerate a comprehensive inspection report for transparency and decision-making.

By following these steps and maintaining proactive communication with manufacturers, businesses can successfully perform pre-shipment inspections to ensure the quality control of their products sourced from China.



In summary, mastering Die-Casting manufacturing in China requires a deep understanding of the industry’s rapid development and the unique opportunities it presents. As the demand for lightweight components in the automobile industry continues to grow, die casting plays a crucial role in achieving energy-saving goals and reducing emissions. The advantages of aluminum die casting make it the preferred choice for lightweight vehicles.

Quality control is paramount in the Die-Casting process. Developing detailed product specification sheets and inspection specification sheets based on your requirements is crucial for maintaining quality control. Effective communication with manufacturers and a proactive approach to quality assurance are key to ensuring transparency and satisfaction.

By following the recommended steps outlined in this article, businesses can navigate the Die-Casting manufacturing process in China with confidence. With a clear understanding of the industry’s opportunities, the importance of lightweight components in the automotive sector, and the implementation of robust quality control measures, we can achieve successful and efficient Die-Casting manufacturing.



What is Die-Casting?

Die-Casting is a manufacturing process in which molten metal is forced into a mold cavity under high pressure to produce complex-shaped parts with high accuracy and dimensional consistency.

Why has Die-Casting production increased in China?

China’s Die-Casting production has experienced rapid growth due to its unique market advantages, including relatively low cost of resources and labor. This has attracted manufacturers and led to China becoming the second-largest Die-Casting producer in the world.

How does the automobile industry drive the demand for Die-Casting?

The automobile industry requires lightweight components to achieve energy-saving and emission-reduction goals. Die casting, particularly aluminum die casting, offers a lightweight advantage that improves fuel efficiency, reduces emissions, and enhances vehicle performance.

What are the steps to perform a pre-shipment inspection?

The steps to perform a pre-shipment inspection include reviewing specifications, scheduling the inspection, preparing necessary documents and tools, conducting on-site inspections, and reporting the inspection results. Effective communication with the factory and proactive quality control are key to a successful PSI.

How can successful Die-Casting manufacturing be achieved in China?

To manufacture Die-Casting successfully in China, it is important to understand the industry’s rapid development and the opportunities it presents. Implementing quality control measures, such as pre-shipment inspection, is crucial to ensure that manufactured products meet specified standards. Active communication with manufacturers is essential for a successful manufacturing process.

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