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Die Casting News

Applying and Handling Die Lubricants

Posted by Hill and Griffith Company on Jul 9, 2020 9:11:53 AM

How to control lubricants for better housekeeping

Excerpt from the April 2003 issue of Stamping Journal by Stan Reinke

Effective application of die lubricants typically is overlooked in many stamping facilities. Many companies try to get by with applying as little lubricant as possible, just so they don't have to deal with the mess.

However, metal stampers need to move away from thinking of in-die lubrication as a necessary evil and instead view it as a powerful tool that, when applied effectively, can improve die life, press speed, and part quality.

In many applications, the lubricant first is applied to the stock. Some companies use roller coaters for this job. However, for operations in which the lubricant must be reapplied in the die, spray lubrication often is required.

Die Casting fig1

Die Lubrication Methods

In many applications, the lubricant first is applied to the stock. Some companies use roller coaters for this job. However, for operations in which the lubricant must be reapplied in the die, spray lubrication often is required. (see Figure 1).

If possible, spray line and nozzle location should be determined during die design (see Figure 2). If that cannot be done, the next step is trial and error. During the initial setup stages of running a new die, magnetic-base spray assemblies can be used to determine the best placement for the nozzles. Once determined, the hard plumbing for the spray lines and nozzles can be installed.

Die Casting Machine


If possible, spray line and nozzle location should be determined during die design. During the initial setup stages of running a new die, magnetic-base spray assemblies can be used to determine the best placement for the nozzles.

Locating a central manifold on the die will assist quick die setup. From the manifold, all lines are routed to each spray location and hard-plumbed to the die. For large dies or applications that require longer spray lines, consideration must be given to the type of spray line that will be used. For these applications and ones that require the use of a high-viscosity lubricant, a harder or rigid spray line typically is recommended. A soft spray line could result in a loss of line pressure, producing a less effective spray pattern.

Proper punch lubrication sometimes may require introducing the lubricant directly onto the punch, rather than spraying it (see Figure 3). A groove is machined in the stripper plate of the tool, allowing the lubricant to be pumped directly onto the tool. This allows the lubricant to fill the groove and "weep" around the punch.

Die Casting Illustration

If space is limited, spray nozzles may be buried in the die. Figure 4 illustrates three spray nozzles mounted in the bottom of the die. In this process, the lubricant is applied to the bottom of the part before the extrude station of the tool.

Die Casting Spray Heads

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Tags: Die Casting, Die Casting Release Agents, Die Casting Lubricants, Release Agents for Die Casting, Aluminum Die Casting Process, Die Casting Defects, Die Casting Lubricant, Aluminum Die Casting, die casting lubricant management, Stamping Journal


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We're known for our hands-on approach. Let us visit your plant, offer die casting technical support and recommend release agents, lubricants, plunger lubricants and permanent mold lubricants that suit your needs. Products that represent the latest in technology and ongoing research that enhance competitiveness and increase productivity. 

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We are pleased to provide samples in quantities large enough to allow you to "try before you buy." Die Casting and Squeeze Lubricants- Diluco®, Permanent Mold Coatings- Concote™, Plunger Lube™- Graphite and non-graphite oils and pastes with excellent anti-wear properties, Casting Operations Products: Start-up lubes, Ladle coatings, Anti-soldering pastes, Water glycol, Trim press lubricants, Surface protection for casting storage, Corrosion protection for die storage, Cleaners for machines and dies, Corrosion protection for machines, Heat treatment quenchants, and Heat-transfer fluids. Also, Industrial Lubricants Griflube®, Hydraulic fluids with fire-resistant and anti-wear properties, Bio-Syn natural ester-based hydraulic fluid, Way oil knuckle lubes and Metalworking Fluids- Grifcut™

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