In the competitive world of plastic manufacturing, an injection mold is not just a tool; it is a massive financial investment, often costing tens of thousands of dollars. Yet, surprisingly, many facilities neglect proper storage protocols, ignoring the use of a high-quality Mold Protection Spray until it is too late.
When a steel mold is removed from the injection machine and placed on a shelf, it immediately becomes vulnerable. Humidity in the air, condensation from temperature changes, and acidic residues from PVC or flame-retardant plastics begin to attack the metal surface. Without a barrier, corrosion pits can form within days, ruining the mirror finish required for high-quality plastic parts.
In this guide, we will discuss why corrosion happens and how Maxray Mold Protection Spray acts as the ultimate insurance policy for your valuable tooling.
The Hidden Enemy: Why Molds Rust in Storage
Even in a climate-controlled warehouse, moisture is the enemy.
- Condensation: When a warm mold is moved to a cooler storage area, condensation forms on the surface. This water acts as an electrolyte, accelerating oxidation.
- Acidic Vapors: Some polymers release corrosive gases during processing. If these residues are not cleaned and sealed, they eat away at the steel texture.
- Fingerprints: The acids in human sweat can etch permanent fingerprints into a polished mold cavity if touched without gloves.
The Solution: A Protective Barrier
Standard machine oil or WD-40 is not enough for mold protection. Oils eventually run off due to gravity, leaving the top surfaces dry and exposed.
Maxray Mold Protection Spray is engineered specifically for this purpose. When applied, it does not just “wet” the surface; it displaces moisture and leaves behind a semi-dry, waxy, or oily protective film (depending on the specific formula variant). This film creates an airtight seal that neutralizes fingerprints and blocks oxygen for months, or even years.
Step-by-Step Guide to Protecting Your Molds
Step 1: Thorough Cleaning Never spray protection over a dirty mold. Use Maxray Mold Cleaner to remove old release agents, plastic residues, and grease. The surface must be chemically clean.
Step 2: Ensure It Is Dry Use compressed air to blow out every water channel and crevice. Any water trapped under the protective layer will cause rust from the inside out.
Step 3: Apply Maxray Mold Protection Spray Shake the can well. Hold it 20-30 cm away from the mold face.
- The Technique: Apply a uniform coat over the entire cavity, core, and parting lines. Do not forget the ejector pins and slide mechanisms.
- Color Indicator: Maxray’s formula often provides a slight visual tint so you can see exactly where you have sprayed, ensuring no spot is missed.
Step 4: Close and Store Close the mold halves (but not under high clamping pressure) to minimize air exposure and store it in a dry location.
How to Remove It Before Production One of the biggest fears molders have is: “Will this ruin my next production run?” Maxray Mold Protection Spray is designed for easy removal. Before the next run, simply wipe it off with Maxray Mold Cleaner. Alternatively, some “dry” variants are designed to mold off automatically during the first few shots, saving you setup time.
Conclusion The cost of repairing a rusted textured surface is huge compared to the price of a single can of spray. Make Maxray Mold Protection Spray a mandatory step in your shutdown procedure to ensure your tools are ready for action whenever you need them.
