China Pressure Die Casting
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China Pressure Die Casting

​Die casting is a process utilized to produce various metal products, such as components for cars and paper clips. This process involves pouring molten metal into mold cavities. This process eliminates the need for follow-up machining after production. It allows the production of bulk metal parts for various industries.

China Die Casting

Die casting is a process utilized to produce various metal products, such as components for cars and paper clips. This process involves pouring molten metal into mold cavities. This process eliminates the need for follow-up machining after production. It allows the production of bulk metal parts for various industries.

Die casting in China

Due to the increasing demand for metal products in various industries, such as the automobile industry, China has become a leading die casting hub. The push for die casting is also due to the “Made in China” strategy adopted by China that is focused on boosting manufacturing in various sectors.

The main advantage of choosing to work in China is the low cost of production. In addition, private manufacturers in the country have become more competitive. Regional manufacturers in some countries, including China, account for 55% of the global die casting market. In 2015, China produced around 3.7 million tons of die castings. This amount accounts for approximately 45% of the world's total casting production. A majority of die castings made in China are used for motorcycles and automobiles.

Advantages of Die Casting

● Die casting produces bulk metal parts that retain their uniformity.

● High-quality products can be produced in this method that has a long service life.

● Any surface texture, geometry, size, and luster can be created using die casting.

● The production process is quick and seamless as minimal maintenance is required for die casting tools.

● Wide-ranging assembly features, such as studs and drill holes, can be incorporated into the design of the die casting mold to minimize post-production assembly.

● High accuracy.

● Designs of varying complexities or details are repeatable.

● Reduced cost as there is only one process of production.

● Minimal scrap and waste material.

Metals Die Casting

Different kinds of metals and alloys are used in die casting. The choice of the material depends on the properties and weight of the component. Most commonly used metals are non-ferrous metals such as copper, titanium, zinc, and tin. Some examples of these are nickel, aluminum, and zinc. Among the various metals used in die casting, aluminum is the most widely used non-ferrous metal. Some metals, such as aluminum and magnesium, have high melting points while other metals, such as zinc, have low melting points.

● One of the most widely used metals for die casting is zinc, which has a high ductility and impact strength.

● Magnesium is one of the easiest metals to machine while being the lightest alloy and has an excellent ratio of strength-to-weight ratio.

● Aluminum is a popular metal for die casting due to its properties such as corrosion resistance and lightweight. Other advantages of aluminum include its high mechanical properties and thermal conductivity. The properties of aluminum make it a popular choice for die casting. Aside from these, it can also retain its strength even at high temperatures.

● Copper is a high-quality material that has various mechanical properties. It can also resist various kinds of corrosion.

● Tin and lead have high density and are preferred for their special corrosion resistance properties. These metals offer optimal dimensional accuracy. Due to its heavy metal content, lead is not commonly used as a component for food-service applications. Instead, it is commonly used as an alternative material.

● Silicon tombac is an alloy made of zinc, silicon, and copper that gives it high strength and is typically used as an alternative for cast steel parts.

Types of die casting

Hot Casting or Hot-chamber Die Casting

Hot casting is a more common method used for die casting. This process involves immersing the injection mechanism's cylinder in a molten metal bath. The feed system used for this process helps pull the molten metal into the die. Compared to the cold chamber process, the hot casting method produces a high rate of production. Although the chamber is in contact with the molten bath, the risk of corrosion is still high due to the varying melting points of different metals.

Cold-Chamber Die Casting

While the cold-chamber process resembles the hot-chamber process, its main purpose is to minimize the machine's corrosion. The cold-chamber process involves pouring molten metal into the machine's injection system. This eliminates the need for immersing the metal in a molten bath. The cold-chamber process is an alternative method for casting non-hot metals such as aluminum and its alloys.

Die Casting Processes

Low-Pressure Die Casting

The low-pressure process is ideal for components that have symmetry on their axis of rotation. The mold is vertically aligned with the molten metal bath and a riser tube is used to connect the two sections.

Vacuum Pressure Casting or VPC

Another newer method of casting is vacuum pressure. This process ensures better strength and minimal porosity.

Squeeze Die Casting

This process works by filling an open die with molten metal. The metal then gets squeezed to force it into the molding.

Semi-Solid Casting Process

Also known as Thixeyforming, semi-solid die casting produces high-quality components with minimal porosity and maximum density. After the metal achieves a liquid state, it is forced to a shot sleeve to prevent it from creating a slushy texture.

How to Find High-quality Die Casting Manufacturers in China

There are many manufacturers in China that are invested in die casting which enables mass production of bulk metal parts at low cost. In total, China has over 26,000 metal die casting factories. Many of these are focused on non-ferrous casting. Before you start looking for a die casting company in China, it is important that you have the necessary details about the component you require.

Deciding on the type of die casting company that will work with you is a bit different from choosing one from the numerous manufacturers in China. However, it is important to consider the company's quality and the requirements for your products. Before you start working with a die casting company, it is important that you have an estimate that includes the various expenses involved in the process. You can find die-casting companies in China through various online platforms such as, Tradekey, and Made in China. You can also attend trade fairs to get in touch with a local die casting manufacturer. There are also various exhibitions that are held in China that feature different types of die casting machines and solutions. Before you start searching for a die casting company, check the company's background and look for details about its factory locations, product offerings, and capabilities. Doing so will help you narrow down your list to a few companies that can meet your requirements. Before you finalize your purchase, make sure to visit the factory to verify the company's capabilities and quality control measures. Before you can start working with a die casting company, you have to make sure that the OEM contract and the NDA are prepared in Chinese. Having a communication window with the manufacturer will allow you to keep in touch with them regularly and monitor their quality control. This will also help you keep track of your project's progress and provide you with regular updates. After choosing a shipping method, contact a freight forwarding company to ensure that the parts reach their destination on time. While die casting has definite advantages, there can also be certain disadvantages that include

Cost - Complex, large tools in die casting can involve a high cost of manufacturing

Many die casting companies in China are equipped with the latest technology to prevent warping and shrink metal parts. This process can also alter the dimension of the components. Die casting is ideal for making products in bulk. However, if your production requirements are limited, it may be better to use other methods. A reliable company that specializes in China will be able to provide you with the most effective solutions for your concerns. However, doing so should be accompanied by regular quality inspections and meetings with the company's officials. A well-known China sourcing agent can help you find the right die casting company in the country. It can handle all of your requirements, including negotiating terms, and ensuring that the finished products meet your expectations.

Contact TEAM MFG

TEAM MFG is a team of expert China die casting manufacturer that has helped western customers manufacture and source products from low-cost regions since 2016. For more on China sourcing visit our website or contact us today!