--- title: How to Avoid Splitting Hanger Dies in Cast Film Extrusion description: Tired of splitting hanger dies just to clean them? 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[Twitter Tweet ](https://twitter.com/intent/tweet?url=https%3A%2F%2Fwww.asaclean.com%2Fblog%2Fhow-to-prevent-splitting-hangar-dies-for-color-or-material-changes-for-cast-film-extrusion&text=How+to+Avoid+Splitting+Hanger+Dies+in+Cast+Film+Extrusion) - [LinkedIn Share ](https://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fwww.asaclean.com%2Fblog%2Fhow-to-prevent-splitting-hangar-dies-for-color-or-material-changes-for-cast-film-extrusion&title=How%20to%20Avoid%20Splitting%20Hanger%20Dies%20in%20Cast%20Film%20Extrusion&summary=Tired+of+splitting+hanger+dies+just+to+clean+them%3F+Discover+a+proven+purging+method+that+eliminates+carbon%2C+resin%2C+and+color+buildup%E2%80%94no+teardown+needed.&source=) - [Pinterest Pin ](https://pinterest.com/pin/create/button/?url=https%3A%2F%2Fwww.asaclean.com%2Fblog%2Fhow-to-prevent-splitting-hangar-dies-for-color-or-material-changes-for-cast-film-extrusion) - [Email Email ](mailto:?subject=How%20to%20Avoid%20Splitting%20Hanger%20Dies%20in%20Cast%20Film%20Extrusion&body=https%3A%2F%2Fwww.asaclean.com%2Fblog%2Fhow-to-prevent-splitting-hangar-dies-for-color-or-material-changes-for-cast-film-extrusion) ![How to Avoid Splitting Hanger Dies in Cast Film Extrusion](https://www.asaclean.com/hs-fs/hubfs/Avoid%20Die%20Teardowns%20Blog%20Header-1.jpg?width=640&height=500&name=Avoid%20Die%20Teardowns%20Blog%20Header-1.jpg) ![Cast Sheet Extrusion](https://www.asaclean.com/hs-fs/hubfs/Cast%20Sheet%20Extrusion.jpg?width=300&name=Cast%20Sheet%20Extrusion.jpg) I recently visited a prospect who produces cast films from 0.003” to 0.025” in various resins and colors including R-PVC, PMMA & PC from a 34” hanger die and a 3.5” diameter screw. They called me with a problem.  It takes several hours to tear the extruder apart and then split the die to remove the previous color, carbon and resin. This is a laborious task to say the least, which requires a technician to loosen several large bolts while the die temperature is still at 400-500ºf. Once all the bolts are removed, he has to turn the die and split it to clean out said material. Then he reverses the process and get the die ready for the next run. This blog will hopefully help those having similar issues to simplify their process. - 1) Choose the proper purge compound for the resin being processed. In this case I chose Asaclean NCT as the R-PVC resin had a durometer of 84. - 2) The R-PVC was running 400ºf. Flush out the R-PVC with a flush resin HDP. - 3) Raise the heats on all equipment from the end of the extruder through to the die to 500º. This temperature will help with carbon removal as well). - 4) Start extruding the NCT through the system at a fast rate in order to fill out the hanger all the way to the ends of the die -  5) When you are extruding a fairly uniform sheet of purge, reduce RPMs to 5-8 RPMs and allow the purge to soak with the screw slowly turning for 20-30 minutes. - 6) Once the soak time is complete, run out the remainder of purge - 7) Raise or lower your heats to the next production resin and flush the remainder of the purge from your system Once you complete step 7, the machine and die are now clean and there is no need to split the die to clean it. This prospect (turned customer) has saved a tremendous amount of time and money not having to split the dies anymore for cleaning and now has more up time to produce salable product. That is not even including reducing the wear and tear on the machine. If you are struggling in cast film, consider this approach and learn how to make your life easier. **Learn about the importance of implementing proper purging procedures by downloading this free industry guide.** **** ** [![](https://no-cache.hubspot.com/cta/default/468726/interactive-161630774182.png) ](https://www.asaclean.com/hs/cta/wi/redirect?encryptedPayload=AVxigLLbUqeAWvf%2BBub0bXxjzQ5mVfOBDsC8GslwjmeyAKw92eDEoCqkjmSez0o6ip3ZZKgxOnPbZyT7HA9mZyg2B5ygKSVj7KGwQKkUalIFthQ4dvcMUSItBguUH7aF%2BHolAth%2FwUH%2BcAZeWb7qHI6IIxGNAxXPGpYopRFJqXicTJKFd1J%2FV4krj2ugbIUxrCBToS0v%2F%2FYRXPPGcBZWk41ovDjDDZs%2BLhyOVCj4L5Usq9%2FpIqqkyFByGMpt&webInteractiveContentId=161630774182&portalId=468726) ** ** ** ![Eric Despotovich](https://www.asaclean.com/hs-fs/hubfs/Eric%20Despotovich%20LinkedIn%20Headshot%202%20-%20Copy.jpg?width=150&name=Eric%20Despotovich%20LinkedIn%20Headshot%202%20-%20Copy.jpg) #### [ Eric Despotovich ](https://www.asaclean.com/blog/author/eric-despotovich) Eric Despotovich, an esteemed Asaclean Purging Expert and Technical Sales Representative, brings over 40 years of processing experience to his role. With over 18 years of dedication to our company, Eric has become a cornerstone of our sales team, renowned for his commitment to client success. His extensive industry knowledge and genuine passion for helping clients make him a trusted advisor in optimizing their operations. Eric's approach is characterized by deeply understanding each client's unique challenges, ensuring tailored solutions that drive efficiency and profitability. - [Share On LinkedIn ](https://www.linkedin.com/in/eric-despotovich-5449682b) ## Related Posts [![Cast Sheet Extrusion](https://www.asaclean.com/hs-fs/hubfs/Cast%20Sheet%20Extrusion.jpg?width=450&height=250&name=Cast%20Sheet%20Extrusion.jpg) 10 Tips to Remove Carbon From Hanger Dies in Cast Film Applications Troubleshooting / 3 min read / September 18, 2018 ](https://www.asaclean.com/blog/10-tips-to-remove-carbon-from-hanger-dies-in-cast-film-applications) [![3 Effective Tips for Managing Shear Heat in Injection Molding](https://www.asaclean.com/hs-fs/hubfs/pexels-photo-167084.jpg?width=450&height=250&name=pexels-photo-167084.jpg) 3 Effective Tips for Managing Shear Heat in Injection Molding Troubleshooting / 2 min read / October 22, 2024 ](https://www.asaclean.com/blog/3-tips-for-dealing-with-shear-heat-in-injection-molding) ## Comments Get Started ## Ready to start improving your efficiency and increasing your profitability? - [Request a Consultation](https://www.asaclean.com/blog/how-to-prevent-splitting-hangar-dies-for-color-or-material-changes-for-cast-film-extrusion#) - [Contact Sales](https://www.asaclean.com/blog/how-to-prevent-splitting-hangar-dies-for-color-or-material-changes-for-cast-film-extrusion#) ![](https://www.asaclean.com/hubfs/assets/images/icons/icon-layers.svg) #### Free Sample Request a free sample of Asaclean® Purging Compounds for your plant and start saving today. 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[See your savings](https://www.asaclean.com/cost-savings-calculator) [ Back to Top ](https://www.asaclean.com/blog/how-to-prevent-splitting-hangar-dies-for-color-or-material-changes-for-cast-film-extrusion#top) ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Eric Despotovich", "url" : "https://www.asaclean.com/blog/author/eric-despotovich" }, "dateModified" : "2025-05-06T16:35:52.879Z", "datePublished" : "2018-12-18T12:32:00.000Z", "headline" : "How to Avoid Splitting Hanger Dies in Cast Film Extrusion", "image" : [ "https://www.asaclean.com/hubfs/Avoid%20Die%20Teardowns%20Blog%20Header-1.jpg" ], "mainEntityOfPage" : { "@id" : "https://www.asaclean.com/blog/how-to-prevent-splitting-hangar-dies-for-color-or-material-changes-for-cast-film-extrusion", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://www.asaclean.com/hubfs/Asaclean%20Logo%20TM.jpg" }, "name" : "Asahi Kasei Plastics North America" } } ``` ```json { "@context" : "http://schema.org", "@type" : "Article", "articleBody" : "I recently visited a prospect who produces cast films from 0.003” to 0.025” in various resins and colors including R-PVC, PMMA & PC from a 34” hanger die and a 3.5” diameter screw. They called me with a problem. It takes several hours to tear the extruder apart and then split the die to remove the previous color, carbon and resin. This is a laborious task to say the least, which requires a technician to loosen several large bolts while the die temperature is still at 400-500ºf. Once all the bolts are removed, he has to turn the die and split it to clean out said material. Then he reverses the process and get the die ready for the next run. This blog will hopefully help those having similar issues to simplify their process.", "author" : { "@type" : "Person", "name" : "Eric Despotovich" }, "datePublished" : "December 18, 2018", "headline" : "How to Avoid Splitting Hanger Dies in Cast Film Extrusion", "image" : "https://468726.fs1.hubspotusercontent-na1.net/hubfs/468726/Avoid%20Die%20Teardowns%20Blog%20Header-1.jpg", "name" : "How to Avoid Splitting Hanger Dies in Cast Film Extrusion", "url" : "https://www.asaclean.com/blog/how-to-prevent-splitting-hangar-dies-for-color-or-material-changes-for-cast-film-extrusion" } ```