Cast Film Flat Die Cleaning & Servicing
Importance of Regular Die Cleaning
Flat Dies for cast films and sheets require annual cleaning to remove polymer build-up. Over time, this build-up can hinder optimum thickness control and disrupt the uniform operation of the Lip Gap. This maintenance process, commonly called a "Die Strip & Clean," ensures consistent performance.
Challenges of Dirty Dies
Thickness Control Issues
Polymer residue makes it challenging for the thickness measurement system to maintain cross-direction tolerances effectively.
Flow Line Formation
Excessive Die Lip build-up caused by unclean Dies can lead to flow lines across the melt curtain.
The Split & Clean Process
The Split & Clean procedure, which typically takes 2 to 3 days, involves carefully cleaning the Dies to restore their efficiency. This process requires proper tools and cleaning items to ensure safety and effectiveness.
Die Refurbishment Services
If your Die has sustained damage—such as deep chips or plating issues—Back to Spec offers a comprehensive Die refurbishment service. This is usually conducted off-site and restores the flow surface to optimal condition.