Cycles of purge depend on the complexity of material, number of colors processed, additives and processing parameters. Maintenance departments often clean screws wrongly, causing serious and expensive damage. Learn how to improve purge results by varying low and high backpressure. you should use. Dyna-Purge Purging Compounds: A New Level of Purging Homepage Purging the screw and barrel of an extruder is typically straightforward and easy, though it tends to become more difficult when more mixing/kneading elements are used. Our purging compound removes all deposits from the screw and barrel. Often compounding different resins requires different screw design or the compounder is required to pull screw to ensure processing resins dont mix. With operating temperatures of 330 - 610F, this formulation also works on hot runners and thoroughly purges manifolds with gates as small as 30 thousandths. Do Ultra Purge purging compounds release deeply set contamination? Resin or standard purging compounds for extruders can have trouble reaching and cleaning key problem areas that cause streaking such as the far ends of the die head. Using specialized purging compounds provides you with improved machine utilization time and less waste. Ultra Purge grades are developed to cover a wide window of processing temperatures. However, determining the proper purging compound grade is not simply about eliminating color and carbon contaminationits also about the impact on your bottom line. Is the use of virgin material a cheaper alternative than a purge compound? Purgex purging compounds unique foaming quality and cleaning power allows Purgex to target these areas and completely remove production-delaying contaminants. For most compounders, pulling a screw and cleaning it may be the only option to get back into production. Tip 3: Practice preventive purging: Many processors only use purging compounds when its absolutely necessary. Clean Xpress - Purging compound for extrusion & injection molding Taking a holistic approach will help you improve efficiency and profitability. This powerful purging compound helps to remove old resin and color residue in extrusion, injection, and blow molding operations. Whether youre struggling with hot runner color changeovers, costly screw pulls, or holding a bubble in blown-film extrusion, we have the solution to your problems. To work effectively, the purging compound does require heat and containment, so it is important toget the heat needed to clean well, butwithout burning any residual resin that may still be inside the barrel. For twin-screw machines that use simpler screw types and mixing elements, a mechanical purge can work perfectly. Depending on your specific needs, the Unitemp team has various Pekutherm products that work for different machine sizes, processing temperatures, colors, and assorted plastics.This chart can help you navigate through our different formulations.However, you are always welcome to call our office at (888) 864 8367 for friendly assistance. Using a specialized purging compound on machines typically purged with virgin polymer often evacuates several previously processed colors. Whether youre struggling with hot runner color changeovers, costly screw pulls, or holding a bubble in blown-film extrusion, we have the solution to your problems. A purging compound is a resin-based product designed to clean thermoplastic molding machines of many types; injection molding machines, blow molding machines, and extruders which are used to manufacture plastic parts for a wide range of industries, including automotive, consumer, medical, and many others. Econo-Purge quickly, economically and effectively removes old resin and color residue in extrusion, injection and blow molding operations. Leading manufacturer and supplier of high-performance thermoplastic purging compounds. Get Free Sample ASACLEAN Purging Compound Extrusion Procedures - YouTube Is there an Ultra Purge solution to overcome very different processing temperatures during material changes? In most cases, one to three full barrels worth of CPC are sufficient to clean an extruder. Raising the die temperatures by up to 50 F may help soften any deposits within the diebut dont try this if running heat-sensitive resins. These issues affect a variety of applications such as injection molding, extrusion, blown film, and extrusion blow molding. If an olefin is being compounded, cleaning the barrel may take 20 min. This high-performance filled Grade excels in olefinic color changeovers & contamination removal. Taking a narrow view may lead you to choose the wrong purging compound, which ultimately wastes resources and affects profitability. Clean multiple resins for multi-layer extrusion processes. All things to avoid. Chem-Trend's advanced purging compounds undergo rigorous testing and have the backing of global R&D resources. This chemically reactive compound is safe to purge through the mold and helps to . document.addEventListener( 'wpcf7mailsent', function( event ) { It is dangerous to use them in hot runner systems, through screen packs or melt pumps. By doing so, severe buildup on the screw, barrel, hot runners and extrusion dies can be avoided, resulting in less production stoppages, machine downtime, and material waste. They perform best in injection molding and other high-pressure applications. But if you proactively clean your systems, non-glass-filled grades are perfectly acceptable. Regardless of the type of extrusion process, the purging instructions for cleaning the screw and barrel are almost always the same for any particular CPC. We are here to Help. Were here to help. Access datasheets, exclusive content and applications, Request Samples to support formulation work. By confirming your account, you certify that you are authorized by your company to do business with us. Learn how to reduce machine downtime with five quick purging compound tips. With these, the cleaning process relies on chemical additives that initiate some form of chemical reaction. Your priorities and needs will vary based on the industries you serve. Please login or reset your password. Feed two-barrel capacity of purging compound into the extruder. Asaclean's CP Grade purging compound is also suitable for fast and effective purging of hot runner systems. Use our free calculator to see how much you could be saving with UNICLEANPLUS Purging Compounds. Mechanical purge compounds do an excellent job of safely scrubbing screw and barrel surfaces. How to Pick the Best Purging Compound For Your Extruder - Asaclean We have found an existing account with credentials. If you understand the impact of each of these questions, you are equipped to choose the right solution to effectively clean your extruder. Purging Compounds for General Extrusion Profile extrusion is a continuous process where contamination issues can lead to large amounts of scrap and necessitate time-consuming teardowns. Click here to begin the process. Mechanical Purging Compounds | Asaclean Purging Compounds helps you maximize your operational efficiency by effectively eliminating, contamination and increasing up-time and productivity. CPCs have proven to be invaluable tools for addressing market factors such as heavier reliance on just-in-time processing, increased pressure for cost savings in order to remain competitive, and use of more advanced resins, colorants, and additives. Not all purging compounds are safe for use in hot runner systems, screen packs, melt pumps and extrusion dies. Can purge compounds be reground and reused for future purging? Sometimes a change in product requires you to swap out a screw element, and this can be time-consuming if the screws are not in an ideal condition for removal. . Asaclean understands your priorities and has excellent cost savings solutions specific to your process and industry. During the purge, periodically stop the screw and allow the purge to settle into any dead areas. It is no longer debatable whether the use of a purging compound is crucial in thermoplastic processing, whether it be injection molding or extrusion. Contact a purging process expert at UNICLEANPLUS to know the right procedures. If you need faster changeovers, purging compounds are an easy win. Specialized purging compounds have been developed specifically for these polymers. Our singular focus is saving your facility save time and money. Plastics Purging Compounds | Plastics Technology But its not simply temperature alone thats important; you must also consider whether youre switching from high- to low-temperature resins, or vice versa. Learn more about the benefits of UNICLEANPLUS purging compounds. Contact:973-257-1999;thanvey@asaclean.com; asaclean.com. Polymer contamination/carbonization, additives, encrustations, degraded material, or color residue from dirty equipment can be released by utilizing one of our highly specialized Ultra Purge purging compounds. Using specialized purging compounds saves considerable time and energy between the last quality part produced in previous resin or color and the first quality part following. Color/Carbon Streaking You cant afford to wait to run purging compounds until the last minute because, by that time, youre already suffering from contamination issues or color streaks. There is a wide range of problems your extruder may be experiencing, and the kinds of issues youre having such as color streaking, the presence of black specks or trouble removing previous resins will likely dictate the best solution for your situation. 3 Purging Compounds are an easy-to-use and affordable way to dramatically reduce scrap & downtime in plastics manufacturing. Receive the latest news about products, news and more! They are universally usable in hot runner systems and can be injected in cavities when a purge compound with an appropriately suitable MFI is selected. Do not increase temperature inside the barrel until you are certain all the PVC has been removed. David Krueger, a process engineer at Asahi Kasei Plastics North America (APNA) has spent his career in compounding and knows how this seemingly cost-saving decision can backfire. If no plug is available, or if your company has a policy against doing so, we recommend that CPC be fed into the vent simultaneously with its feed into the main hopper. [Log On]. Universal purging compounds are effective only on polymers compatible with their matrix and MFI and less effective on incompatible polymers and/ or with very different matrices. Pekutherm EX is a soft-scrub physical action Purging Compound designed for Extruders, that stridently yet gently scours away outgoing plastic, built up previous material, burnt on residues, expels color and off spec.contaminants including gas residues. How to Use Commercial Purging Compounds in Extrusion Most CPCs are designed to remove stubborn carbon and color deposits while ordinary processing resins cannot. If you are using Internet Explorer (IE), please switch to another browser for the best visual experience. Purge (Rigid PVC) Aurora Plastics has a line of AuroraClean purge compounds, designed to clean all primary plastic machinery, including injection molding machines, blow molding machines and extruders. Different applications may require different temperatures, and may necessitate high-scrubbing action. There are no one-size-fits-all solutions in purging, so let us help you find the best grade of Asaclean for your processing goals. UNIPURGE DFDB-0964 NT 7 Purging Compound - Dow If youre unsure ofhow to most efficiently clean your extruder, its best to reach out to your purging compound supplier directly. Learn how processors at over 2,000 manufacturing locations in North and South America use Asaclean to cut scrap rates, reduce downtime, and transform their process efficiency. We request that you confirm your website account is valid and verify your email address. Using the right purging compound helps you maximize your operational efficiency by effectively eliminating all contamination and increasing uptime and productivity. In time, these layers become additional sources of contamination, making purging even more difficult. Eventually, material flowing over these covered contaminants during a production run willexpose the contaminant to your production resin and produce an unwanted line of color. Just fill out this form to get started. They process almost all resins and allow for different additives and fillers to be combined to achieve different pellet sizes and shapes with an impressive array ofpossible properties. For more information about our use of cookies, please view our Privacy Policy. What about sizing cooling circuits so they provide adequate cooling capacity? In cases of extreme temperature difference a tailored solution may be required and you should check with the technical experts of the purge compound supplier to see what solution might be offered. E Grade is a purging compound for thermoplastic injection molding and extruder machines. Asaclean has several large compounding customers who run several resins or the same resin with different additives. This ensures high-performance and high-quality characteristics remain constant. Tell us what challenges you are facing so we can help you find a solution. Sealing with a heat-stable material ensures that no further degradation occurs and also provides further cleaning. Chemical purge compounds achieve cleaning by measure of a chemical reaction that is contained in the machine during a soak period. Purge Compounds | Rigid PVC |Aurora Plastics This often leads to frustrating production challenges for operators who use traditional methods to clean their thermoplastic processing equipment. UNICLEANPLUS purging compound for extruders proves to be highly efficient in cleaning your extrusion machine. Welcome Name Website Terms of Use have been updated. Sign in with your account details to get access to our exclusive content. Without the right purging compound and procedures, you run the risk of increased reject rates. Yes. , whereas low-temperature resins may require E Grade. Use our free calculator to see how much you could be saving with Asaclean Purging Compounds. Although screw pushes might be necessary in your plant, that doesnt mean they need to be time-consuming, profit-sucking headaches. We always recommend stepping down as you change into a resin with a lower processing-temperature range. When you reach out to a purging expert for a free consultation, they will look at several key things to consider in order to select the right grade and quantities necessary to choose the best purging compound for your system. Chemical purging compounds are safer for the equipment and may also be processed through screen packs and melt pumps. EX Grade is our strongest-cleaning purging compound for thermoplastic injection molding and extrusion machines. You are about to exit this page. UNIPURGE DFDB-0964 Natural 7 provides a practical method of rapidly and economically cleaning plastic processing equipment, such as extruders and injection molders. None of them want to deal with an awful shift starting up on Monday.. This is a very serious processing issue. Purging compound - Clean Xpress - Purging compound Unlike regrind or virgin resins, Mechanical Purging Compounds are designed to clean. PlasE Clean Purging Compound Tip 2: Ask yourself these questions to select the best purging compound for your needs: Introducing a purge program can easily help compounders cut downtime by 50-75%. This guarantees your machine will be running clean in no time. Please try again later. smooth transition between PC and PMMA. Chemical, Mechanical or Hybrid Purging Compounds: What's theBest Option? It is important to control process temperature because high temperature will lead to degradation, and cooler temperatures can lead to excessive shear. With less heat-sensitive materials, residual polymer left in the machine will degrade over a long period of time, but in the case of PVC, degradation will occur immediately. Grades are available for a wide range of resins and melt indexes (MFI). Need to figure out your mold-cooling energy requirements for the various polymers you run? There is no direct answer to this question because it depends on a wide variety of issues. Fortunately, these issues are easily avoided by selecting the appropriate purging compounds for your specific needs. You must ask yourself the following questions in order to determine the right, The size of your machines, specifically barrel capacity, is a main and obvious determinant of how much product you need to use for an effective clean. Lusin has been a leader in the thermoplastics industry for more than 60 years. 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Use of commercial purging compounds (CPCs) has become an integral and even more vital part of thermoplastic processing. The experts agree that changeovers are the biggest issue that compounders struggle with. You can clean the extruders with a die attached by using our highly efficient purging compound. Historically, CPCs have been used less frequently in extrusion than injection molding because of equipment design and the fact that extrusion is a continuous process whereas injection molding is a cyclic process. Chem-Trends advanced purging compounds undergo rigorous testing and have the backing of global R&D resources. Purging the machine on a regular basis or at least at every shutdown provide the best long-term results. Asaclean's UP Grade purging compound is especially suited for fast and effective purging of hot runner systems. They will identify common processing issues they experience most commonly. You must ask yourself the following questions in order to determine the right product grade for your systems. For extrusion purging, operators should ensure that all zones are in the proper temperature range for the type and grade purging compound being used. Cost efficiency is an important consideration for your process. This is due to the limited cleaning performance of virgin polymers. Purging Compounds for Sheet Extrusion . The Experts Speak: Seven Cost-Saving Purging Tips for Compounding Twins Dedicated purging compound grades are especially developed for the cleaning of colors, removal of carbon residues and shut down of machines processing transparent polymers such as PS, SAN, PMMA, PET, and PC. Using the right settings will activate your chemical purge for optimal cleaning power. It is one hundred percent pure. With your efficiency and profitability on the line, you cant afford to predetermine what purging compound to apply and how much of it to use. Non-chemical, non-abrasive, these heat stable products are safe, efficient, effective, and easy to use. The Best Purging Compounds for General Extrusion | Asaclean What is/are the intended application(s) of the purging compound? Ultra Purge provides a broad spectrum of solutions across the Thermoplastics Industry. If the barrel has a vent, we recommend plugging the vent. If you do not have access to view this content after you login, please contact Dow. A well-selected purging compound that matches with your process and polymer can provide extensive production benefits, including time savings (shorter color and material changeover times), material savings, fewer rejects, lower scrap, higher productivity and quality, positive long-term effects on machine cleanliness, and less wear and tear on machine components.
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