BONDERITE® HPDC Lubricants

What is High-Pressure Die Casting?

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High-pressure die casting (HPDC) is a manufacturing process where molten metal is injected into a steel mold cavity at high pressure. Pressures for HPDC are typically between 10,000 and 30,000 psi. High-pressure die casting  is advantageous over other casting methods as it allows for the efficient manufacture of intricate parts with high dimensional accuracy. High-pressure casting has rapid cycle times. The entire process is finished within seconds, from the injection of the molten metal in the mold to cooling and releasing the final part. The fast production time makes HPDC well suited for large-scale manufacturing, where efficiency and productivity are critical.

High-pressure aluminum die casting is increasingly common in industries, such as the automotive market, that need to produce a large quantity of parts with tight tolerances and aesthetic appeal and value the benefits of a lighter, malleable, and more cost-effective metal. Aluminum giga-casting, an extremely high-pressure form of die casting, is being widely adopted by automakers to make large aluminum castings, thereby decreasing the required number of pieces to make the car body. Reducing the number of castings simplifies and lowers the cost of production and reduces the vehicle weight.

While high-pressure die casting offers manufacturers several advantages, the process relies on technology and quality materials to work correctly. Innovations in mold design and simulation software are enhancing the effectiveness of HPDC. Specific lubricants are also necessary to ensure the quality and integrity of cast parts.
 

Why are HPDC Lubricants Important?

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High-pressure die casting lubricants serve several purposes in the die casting process. These specialized lubricants, also called release agents or die sprays, enhance the efficiency, quality, and longevity of the process, mold, and cast parts.

Reduce Friction

A basic function of casting lubricants is to reduce friction by improving lubricity between the molten metal and the walls of the die cavity. Before molten metal is injected into the mold, high-pressure die casting lubricants form a thin film to protect the mold surface. This film acts as a barrier to prevent defects, such as cold shuts and drag marks, leading to higher-quality castings.

Facilitate Flow of Molten Metal

The protective lubricant film on the mold surface also allows for smoother metal flow. Improved metal flow facilitates die fill, which is especially critical in casting intricate, complex parts. The right lubricant will help prevent short fill during high-pressure casting and reduce scrap.

Prevent Soldering and Sticking

Soldering and sticking occur when molten metal solidifies and adheres to the mold surface. Proper die casting lubricants form a protective barrier in the mold cavity to discourage metal adhesion, making it easier to release the finished part without damage.

Henkel BONDERITE® HPDC Lubricants

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Henkel has engineered a portfolio of lubricant solutions for high-pressure die casting to ensure your casting process runs smoothly. Below are some of the key high-pressure BONDERITE® casting lubricants.

How to Choose the Best HPDC Lubricant

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Many factors must be considered when choosing the right high-pressure die casting lubricant, including the type of metal alloy being cast, operating pressure and temperature, and desired surface finish. Casting lubricants are formulated for specific applications and process requirements so that the manufacturer can choose a product that best meets their requirements.

How the high-pressure die casting lubricant is applied is also very important and can affect its effectiveness. Automated spray systems are generally the best option, as spraying applies a precise and uniform coating on the mold surface between cycles. Spray systems provide consistent lubrication, prevent buildup, and minimize waste.

Contact us today to speak with a technical representative and find the best lubricant for your casting operation.