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Heating PVC (Poly Vinyl Chloride) results in the out-gassing of hydrochloric and hydrobromic acids. These acids can lead to pitting, oxidation, and other problems with a mold, die or other metal machinery in the vicinity.
There is a 3-step process that can help protect expensive tools from the damaging effects of out-gassing.
Step 1: Use a neutralizing mold release agent
A mold release formulated to constantly neutralize acids as they are emitted during the mold process is the first line of defense. Constantly re-applying the release strengthens the shield and give you consistent protection.
Slide’s Mold Saver Release Agent is a combination release agent and acid neutralizer. A unique release formulation that utilizes a non-silicone, paintable release oil, it wonât interfere with post-molding decoration of the finished part.
Step 2: Remove plate-out and resin build-up while the mold in still in place
The release of the acids can lead to plate-out and resin buildup on the tool or mold surface. This build-up can cause molding and quality issues, so regularly removing it is essential. There are cleaners that allow you to remove plate-out while the machine is still warm and in the machine, helping you maximize productivity at the same time you protect the mold.
Slide Resin Remover (aka “The Stripper”) provides a quick and easy solution to aid with the removal of this problematic resin. Resin Remover is designed to be used with the mold still in the machine and a surface temperature above 175°F. The chemicals in Resin Remover work with the heat to break down and soften the old, unwanted residue. After approximately 90 seconds, the mold is put back into production. The fresh resin injected into the mold cavity will combine with the unwanted resin material and strip it from the mold, leaving behind a clean, residue-free surface. Using Resin Remover saves time and money as compared to taking a machine out of service and sending the mold to the tool room for manual cleaning.
Step 3: Protect the mold when it is not in use
This is critical. Use a rust preventive offering protection against corrosion and oxidation caused by hydrochloric acid, as well as moisture.
Imagine a mold wrapped for long-term storage, and this air-tight seal trapping large amounts of the acids inside the mold cavity. Using a standard rust preventive will not neutralize these acids, and you could pull the mold from storage to find corrosion and pitting requiring expensive repairs.
Slide Acid Vapor Neutralizer is specifically formulated to help neutralize the acids. It will provide protection against these acids for up to two months, protecting your mold or die investments.
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