--- title: Don't Forget to Clean the Check Ring description: Asaclean Purging Expert Jerry Weddell discusses how processors can clean the check ring in injection molding plastic parts. Purge Compounds can help. image: https://www.asaclean.com/hubfs/Check%20Ring%20Blog%20Header.jpg --- [ Order Online ](https://asaclean.my.site.com/b2bstore) [ Free Sample ](https://offers.asaclean.com/free-sample) ## [ Asaclean Blog ](https://www.asaclean.com/blog) Browse by Topic " aerospace asaclean asaclean news Asaclean® benefits asahi kasei automotive Best Practices black specks blisters blow molding blown-film extrusion buyers caps and closures carbon contamination cast-film extrusion Chemical Purging Compounds clear applications Color Changeovers Company News compounding consumer products contamination Cost savings custom molders Customer Success Story decreasing scrap defects electronics Energy Efficiency EX Grade extruder cleaning Extrusion fillament glass filled Glitter Grade Selection HDPE High and Low Temp Changeovers hold a bubble Hot Runners Injection Molding Injection Molding Tips LDPE Lightweight automotive components LLDPE low residue maintenance Material Changeovers Mechanical Purging Compounds medical Melt Flow Index NPE 24 nylons on the fly packaging PCR PEEK Polypropylene Post Consumer Resins preventative preventative purging processing tips profile extrusion Purge Program purge programs Purge Training Purge Trial purging purging compounds purging concentrates purging procedures Purging Tips quality recycled resins residue issues scrap reduction Screw Pulls sheet extrusion shutdown and sealing start-up super engineering resins Sustainability Tech Day technical support training trials Troubleshooting Twin Screw twin screw extrusion two step purging U Grade ULTEM venting Viscosity webinars wire extrusion - 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[LinkedIn Share ](https://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fwww.asaclean.com%2Fblog%2Fdont-forget-to-clean-the-check-ring&title=Don%27t%20Forget%20to%20Clean%20the%20Check%20Ring&summary=Asaclean+Purging+Expert+Jerry+Weddell+discusses+how+processors+can+clean+the+check+ring+in+injection+molding+plastic+parts.+Purge+Compounds+can+help.&source=) - [Pinterest Pin ](https://pinterest.com/pin/create/button/?url=https%3A%2F%2Fwww.asaclean.com%2Fblog%2Fdont-forget-to-clean-the-check-ring) - [Email Email ](mailto:?subject=Don%27t%20Forget%20to%20Clean%20the%20Check%20Ring&body=https%3A%2F%2Fwww.asaclean.com%2Fblog%2Fdont-forget-to-clean-the-check-ring) ![Don't Forget to Clean the Check Ring](https://www.asaclean.com/hs-fs/hubfs/Check%20Ring%20Blog%20Header.jpg?width=640&height=500&name=Check%20Ring%20Blog%20Header.jpg) ![Sealing Barrel With Asaclean](https://www.asaclean.com/hs-fs/hubfs/Sealing%20Barrel%20With%20Asaclean.jpg?width=300&name=Sealing%20Barrel%20With%20Asaclean.jpg) To maximize the performance of your purging compound you should always completely follow the [purge procedure](https://www.asaclean.com/resources/purging-instructions).  After cleaning the screw and barrel by using medium to high back pressure, don’t forget to clean the non-return valve.  Check rings and ball checks are especially prone to the [buildup of carbon](https://www.asaclean.com/solutions/carbon-contamination), additives and other degraded materials.  The contamination in these areas is tough to remove and will often show up after re-starting following a [color](https://www.asaclean.com/solutions/color-changeovers) or [material change](https://www.asaclean.com/solutions/material-changeovers).  The high pressure generated during the injection process helps to break loose the stubborn buildup in and around the check assembly.  Unfortunately, it also contributes to your start-up scrap after the color change. After thoroughly cleaning the screw and barrel, perform a few air shots to clean the check assembly.  Rotate the screw back to about half or two-thirds of the shot size.  Manually decompress, then manually inject fast air shots. Increase fill rate if necessary, and repeat 2-3 times.  The goal is to force as much purge compound through the check assembly as possible.  This action will help to insure the check ring assembly is as clean as the rest of the screw and barrel. Finish purging the remaining compound from the screw and barrel.  Load the next production material and you will be ready for a fast, low scrap start-up. ![Jerry Weddell](https://www.asaclean.com/hs-fs/hubfs/1713568728231.jpg?width=150&name=1713568728231.jpg) #### [ Jerry Weddell ](https://www.asaclean.com/blog/author/jerry-weddell) With over 30 years in the field, Jerry Weddell is a Technical Sales Representative with a wealth of knowledge in mold-making and purging compounds. While his expertise spans injection molding, extrusion, and blow molding, he is particularly distinguished in injection molding. Jerry's profound understanding of these processes enables him to offer targeted, practical solutions, especially in the nuanced aspects of injection molding. His commitment to providing exceptional guidance and support to clients has made him a respected and trusted figure in the industry. - [Share On LinkedIn ](https://www.linkedin.com/in/jerry-weddell-b0747538) ## Related Posts [![](https://www.asaclean.com/hs-fs/hubfs/Process%20%26%20Industry%20Header%20Photo.jpg?width=450&height=250&name=Process%20%26%20Industry%20Header%20Photo.jpg) Faster Profile Extrusion Color Changes with Chemical Purging Troubleshooting / 2 min read / October 21, 2021 ](https://www.asaclean.com/blog/easier-profile-extrusion-color-changes-with-chemical-purges-concentrates) [![Faster Color Changes & 40% Savings: An Indiana Molder's Success Story](https://www.asaclean.com/hs-fs/hubfs/Car%20Seat%20Blog.jpg?width=450&height=250&name=Car%20Seat%20Blog.jpg) Faster Color Changes & 40% Savings: An Indiana Molder's Success Story Injection... / 3 min read / July 11, 2023 ](https://www.asaclean.com/blog/faster-color-changes-and-cost-savings-an-indiana-molders-success-story) ## Comments Get Started ## Ready to start improving your efficiency and increasing your profitability? - [Request a Consultation](https://www.asaclean.com/blog/dont-forget-to-clean-the-check-ring#) - [Contact Sales](https://www.asaclean.com/blog/dont-forget-to-clean-the-check-ring#) ![](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/dont-forget-to-clean-the-check-ring#top) ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Jerry Weddell", "url" : "https://www.asaclean.com/blog/author/jerry-weddell" }, "dateModified" : "2022-06-30T16:15:35.948Z", "datePublished" : "2019-06-03T18:33:56.000Z", "headline" : "Don't Forget to Clean the Check Ring", "image" : [ "https://www.asaclean.com/hubfs/Check%20Ring%20Blog%20Header.jpg" ], "mainEntityOfPage" : { "@id" : "https://www.asaclean.com/blog/dont-forget-to-clean-the-check-ring", "@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" : "To maximize the performance of your purging compound you should always completely follow the purge procedure. After cleaning the screw and barrel by using medium to high back pressure, don’t forget to clean the non-return valve. Check rings and ball checks are especially prone to the buildup of carbon, additives and other degraded materials. The contamination in these areas is tough to remove and will often show up after re-starting following a color or material change. The high pressure generated during the injection process helps to break loose the stubborn buildup in and around the check assembly. Unfortunately, it also contributes to your start-up scrap after the color change.", "author" : { "@type" : "Person", "name" : "Jerry Weddell" }, "datePublished" : "June 03, 2019", "headline" : "Don't Forget to Clean the Check Ring", "image" : "https://468726.fs1.hubspotusercontent-na1.net/hubfs/468726/Check%20Ring%20Blog%20Header.jpg", "name" : "Don't Forget to Clean the Check Ring", "url" : "https://www.asaclean.com/blog/dont-forget-to-clean-the-check-ring" } ```