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Factory Web Guiding System, Automatic Biodegradable Nylonplastic LDPE PVC Shrink Extrusion-Blow Molding Bag Making Packing Stretch Plastic Film Machine1
Plastic MachineryAutomatic Biodegradable Nylonplastic LDPE PVC Shrink Extrusion-Blow Molding Bag Making Packing Stretch Plastic Film MachineFilm Blowing MachineMachine
Chongqing Bianfu Technology Co., Ltd
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Product Description The application of precision web guiding (correction) systems in blown film extrusion machinery is a critical technological requirement that directly determines the quality, efficiency, and profitability of the film production process. These systems ensure the stability and precise alignment of the newly formed film bubble and the flattened web (known as the layflat) throughout the downstream converting stages, from the extrusion die to the final wound roll.The Critical Need for Precision in Blown Film ProductionBlown film extrusion is a complex process where molten polymer is extruded through a circular die to form a continuous tube, which is then inflated into a bubble, cooled, and collapsed into a double-layered flat film. This process introduces inherent challenges that make web guiding indispensable:Bubble Instability: The molten polymer bubble is susceptible to external disturbances (air drafts, temperature variations) and internal stresses, which can cause the bubble to sway or drift off-center. This instability, if uncorrected, leads to inconsistent gauge (thickness) and uneven cooling.Layflat Alignment: As the bubble is collapsed into layflat, its center must be perfectly aligned with the centerlines of the downstream nip rolls and idler rollers. Any misalignment here causes:Gauge Bands: Thick or thin streaks to wind into the roll, creating hard or soft spots that make the film unsuitable for high-speed converting (e.g., printing, bag making).Wrinkles and Creases: Misaligned film will bunch and fold, creating permanent defects that result in scrap.Telescoped Rolls: Improper winding from misalignment produces unstable rolls that cannot be handled or used in subsequent processes.How the Correction System Works in a Blown Film LineA web guiding system in a blown film line acts as the central nervous system for stability. It typically employs a center guiding or line guiding approach, as maintaining the absolute centerline of the process is paramount.The system's components are strategically integrated:Sensor: An optical sensor (often laser or CCD camera-based) is positioned above the collapsing frame or at the nip rolls. It detects the precise position of the layflat's edge or a reference line. For center guiding, two sensors often work together to find the web's centerline.Controller: The programmable logic controller (PLC) receives the sensor's signal. It compares the actual position of the layflat to the preset reference position. Using sophisticated algorithms, it calculates the exact corrective action needed and sends a command to the actuator. The controller's response must be swift and smooth to avoid introducing oscillation into the delicate bubble.Actuator: The actuator physically adjusts the process to correct the misalignment. In blown film, the most common actuation methods are:Rotating/Osciillating Nip Rolls: The primary nip rolls at the top of the tower can be rotated as a unit around the bubble's axis. This is the most effective method, as it gently steers the entire bubble back to center without putting stress on the film.Collapsing Frame Adjustment: The guiding system can automatically adjust the angle of the collapsing frames to recenter the web.Die Rotation: In some systems, the entire extrusion die can be rotated slightly to adjust the bubble's path.This continuous, real-time closed-loop control ensures the bubble and layflat remain perfectly centered and stable throughout the entire process.Key Benefits and Value PropositionThe integration of an automated correction system delivers transformative benefits:Superior Film Quality: Eliminates gauge bands, wrinkles, and creases, producing optically clear and physically consistent film that meets the most stringent quality requirements.Dramatic Reduction in Scrap: Minimizes off-spec production at startup and during running, significantly improving material yield and reducing raw material costs.Increased Line Speed: Enables operators to run the extrusion line at its maximum designed speed with confidence, as the system can correct instability faster than any human operator.Enhanced Process Stability: Protects the bubble from rupturing, reduces downtime for manual adjustments, and allows for the processing of more challenging materials (e.g., very thin gauge films, specialty polymers).Production of Perfect Rolls: Ensures the final wound rolls are tight, even, and free of telescopes, making them ideal for high-speed converting on printing or bag-making equipment.1. Q: When can I receive your quotation or reply?A: Within 1 hours if on our working time 08:30 a.m. to 17.30 pm. Monday to Saturday.Within 24 hours if weekend or holiday. lf you are urgent, welcome to contact us via WhatsApp/Wechat.2. Q: Is small order less than 100pcs accept?A: Sure, small order is welcome. The more quantities are, the better the price is.3. Q: Do you have a catalog or price list?A: Yes, we have a catalog but do not have a price list of all of our products. Because we have so many items, and it's impossible to mark all of their price on a list.Our catalog only shows a selection of products. If you don't find the products you want to in the catalog or on our store website, pls send the part number or detailed pictures with the quantities to us, we'll check them and get back very soon :)4. Q: Can you make customized products?A: Yes, we can! We are very pleased to customize for you. Professional equipments, technicians, skilled workers will give best supports! Provide us your drawing or samples, we can customize on requirements.P.S.: If you don't want to disclose your design to the public, we'll keep it secret.5. Q: Can you provide samples? Are the samples free?A: Yes, we can provide 2-5 pcs connector free samples for the test. But please note that the shipping cost is not included.If you need many items, or need more qty for each item,we will charge for the samples.6. Q: What about your delivery time?A: Enough stock and strong production capacity ensure timely delivery. We can send the stock products within 3-7 work days.If without stock or stock is not enough, we'll check the shipping time with you!We are very pay attention to on time delivery, the lead time of most products does not exceed 1 month.7. Q: How to ship my order? Is it safe?A: For small package, we will send it by Express, such as DHL, FedEx, UPS, TNT, EMS or your designated express company. That's Door to Door service.For big packages, we will send them by Air or by Sea, ensure the package safety.8. Q: How can I make sure the product is shipped out successfully?A: Always final inspection before shipment. When goods are ready, we will take photos for your check before shipping and send them out after your confirmation. If you're not satisfied with our products, we'll refund to you.9. Q: What kind of payment do you accept?A: For small order, we accept T/T.If any questions or requirements, please feel free to "click " on "contact supplier" to chat with us or contact Talita via the information below, we'll be happy to receive your inquiries :)
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