8/14/2024

Rust prevention in injection molding is crucial for maintaining the longevity and performance of molds. Rust can cause defects in the molded parts, affect the accuracy of the mold, and lead to costly maintenance.

Whenever possible, use high quality materials such as stainless steel or other rust-resistant alloys for mold construction. Apply protective coatings or surface treatments like nitriding or chrome plating to enhance resistance to rust. Below are some effective types of coatings and treatments:

• Chromium Plating is a hard, corrosion-resistant coating applied to the surface of the mold. It provides excellent resistance to rust and wear, enhances durability and finish. This plating is ideal for molds exposed to aggressive environments.
• Nickel Plating offers good corrosion resistance and improved hardness. It can be used alone or as a base layer for other coatings. Suitable for molds requiring a combination of corrosion and wear resistance.
• PVD (Physical Vapor Deposition) Coatings is a process where thin layers of material (like titanium nitride or zirconium) are deposited onto the mold surface. They are used for high-precision molds and provide high hardness, low friction, and excellent corrosion resistance.
• Heat treatments such as nitriding or carburizing that harden the steel surface. They improve hardness and resistance to rust and wear. Suitable for molds where increased surface hardness and corrosion resistance are required.
• Ceramic Coatings offers excellent corrosion and wear resistance, high thermal stability. Ideal for molds exposed to high temperatures or aggressive chemicals.
• Anti-Corrosion Sprays or wipes containing rust inhibitors applied directly to the mold surface are easy to apply, provides temporary protection against rust. Used for short-term protection or as part of regular maintenance routines.
• Dry Powder Coatings applied electrostatically and then cured under heat. Provides a tough, durable finish with good corrosion resistance. Suitable for molds that are less frequently used or in environments where they are exposed to corrosive substances.
• Rust-Preventive Oils and Greases applied to the mold surface to form a protective layer. Provides effective, temporary protection against rust and corrosion. Commonly used for short-term storage or when the mold is not in use.

IMS Company’s Rust Preventative sprays create a protective layer on the mold surfaces, preventing rust and corrosion due to exposure to moisture or chemicals. They extend the life of the molds and simplify the maintenance of molds by keeping them in good condition and minimizing downtime.

Types of Rust Preventative Sprays

• Oil-Based Sprays: These sprays provide a thick, protective layer that is effective against moisture. They are often used for long-term storage.
• Water-Based Sprays: These are less greasy and can be more suitable for environments where cleanliness is a priority. They often contain additives to improve their protective qualities.
• Dry Film Lubricants: These sprays leave a dry film that can provide a protective barrier without being greasy, which is useful for high-precision molds.

Best Practices for Applying Coatings:

Ensure the mold surface is clean and free from contaminants before applying any coating. Always follow the manufacturer’s guidelines for applying and curing the coating to ensure optimal performance. Regularly inspect the coating for any signs of wear or damage and reapply as needed. Choosing the right rust preventative coating depends on factors such as the specific application of the mold, exposure conditions, and budget constraints. Combining these coatings with proper maintenance practices will greatly enhance the longevity and performance of injection molds.

• Regular cleaning of the molds to remove contaminants that can contribute to rust formation. Use non-abrasive cleaners that won’t damage the mold surface.
• Ensure that the mold is thoroughly dried after cleaning or exposure to water. Moisture can accelerate rusting. Employ desiccants or drying agents in storage areas to reduce humidity.
• Use rust inhibitors or anti-corrosion sprays on mold surfaces when they are not in use. Lubricate moving parts and components to create a protective barrier against moisture.
• Maintain a stable, low-humidity environment in the molding area and storage. Use dehumidifiers to control moisture levels in the workshop.
• Conduct regular inspections for early signs of rust and address them promptly. Follow a preventive maintenance schedule to address potential issues before they lead to rust.
• Avoid exposing molds to unnecessary moisture or harsh conditions during handling and transportation.
• Use protective covers or wraps when storing molds for extended periods. Store molds in a dry, temperature-controlled environment.

Implementing these practices will help in reducing the risk of rust and prolonging the lifespan of your injection molds.