The Ultimate Solution for Preventing Galvanic Corrosion in Injection Blow Mold Cavities
Are you tired of dealing with galvanic corrosion in injection blow mold cavities? Do your aluminum or copper blow mold water lines pit, leak, or fail prematurely, even after investing in plant-wide water conditioning and deionization? You’re not alone – this is a common problem in injection blow molding that leads to costly downtime, frequent mold repairs, and reduced production efficiency.
Introducing Mold Deputy™, the patent-pending cathodic protection system specifically designed to stop galvanic corrosion right inside your injection blow mold cooling channels.
What Causes Galvanic Corrosion in Injection Blow Mold Cavities?
When side plates come in contact with aluminum or copper cavity blocks, and water flows through the cooling lines, a natural electrochemical reaction occurs. This galvanic corrosion attacks the walls of the water lines, causing pitting, erosion, and leaks at seal faces. Central plant water treatment helps, but it can’t stop local reactions at the mold itself. Deionizing water at each machine is an option, but it’s expensive and complicated.
How Mold Deputy™ Solves the Problem
Mold Deputy™ places a replaceable protector directly in the cooling channels, where corrosion starts. Our internal tests began in April 2023. From those early tests we now have two major variants to offer:
– Sacrificial Inserts that “sacrifice” themselves to protect your cavity metal. These are available in three different configurations.
– Impressed-current option for permanent, no-replacement protection with low-power consumption.
The result? Corrosion is redirected away from your valuable cavity, extending mold life significantly.
Key Benefits of Mold Deputy™ for Injection Blow Molding
– Longer Mold Lifespan: Reduces pitting and leaks in blow mold cavities.
– Less Downtime: Quick replacement – external models swap in minutes without mold teardown.
– Cost Savings: No need for expensive per-machine water treatment; protects locally for less.
– Easy Installation: Fits existing ports with simple threaded or fastened designs.
– Flexible Choices: From basic sacrificial to advanced electric versions for zero maintenance.
Perfect Compatibility with Propylene Glycol (PG) Coolant Mixtures
Many injection blow molding operations use propylene glycol (PG) mixtures in their cooling systems for better temperature control, freeze protection, and improved heat transfer. If you’re running 20-50% PG in your mold water lines, you’ll be happy to know Mold Deputy™ works hand-in-hand with PG coolants – no compatibility issues, and often even better performance.
Here’s how Mold Deputy™ complements propylene glycol mold cooling:
- Enhanced Protection: PG mixtures already include corrosion inhibitors, but they can’t fully stop local galvanic reactions in aluminum or copper cavities. Mold Deputy™ adds targeted cathodic protection right in the channels, stopping pitting and leaks where PG alone falls short.
- No Negative Reactions: Both sacrificial (zinc/magnesium) and impressed-current versions are fully compatible with propylene glycol. PG is non-aggressive to the anodes and titanium electrode.
- Longer Anode Life (Sacrificial Version): PG slightly reduces conductivity, slowing anode dissolution – your replaceable rods last longer without losing effectiveness.
- Easy Adjustment (Impressed-Current Version): PG increases system resistance a bit, so you may need slightly higher voltage (switch to a 12V supply if using 5V). Protection remains strong and reliable.
- Overall Efficiency Boost: Combine PG’s thermal benefits with Mold Deputy™’s corrosion defense for maximum mold uptime and part quality.
Whether you’re using straight water or a propylene glycol coolant mixture, Mold Deputy™ integrates seamlessly into your existing setup. No need to change your cooling system – just add the protection your molds deserve.
Ready to protect your injection blow mold cavities from galvanic corrosion? Contact us today for a quote, demo, or to learn how Mold Deputy™ can boost your plant’s efficiency and bottom line. Patent Pending.
Mold Deputy™ – Your mold’s Trusted Protector