Film Blowing Screw Barrel
Your Professional Film Blowing Screw Barrel Supplier
Established in 2020 as part of East Prospects Int'l Trading Group (referred to as East Prospects), Ningbo DW Plastics Machinery Co., Ltd. (referred to as DW Machinery) specializes in the production of various precision components and the trading of machinery within this industry. Its main product and service offerings include bimetallic, nitrided, or chrome-plated screw barrel sets; tie bars, column shafts, nuts, and pistons; heater bands and couplings; gearboxes (as a sales agent); new and used injection molding machines (as a sales agent); and new and used extrusion machines (as a sales agent).
Why Choose us
R&D Strength
DW Machinery possesses robust research and development capabilities, independently conducting product development, design, and innovation. The company has obtained multiple product patents.
Quality Control
In terms of quality control, as an ISO 9001 certified enterprise, DW Machinery continuously enhances its quality management system by implementing precise inspections at every stage of the production process.
Advanced Production Equipment
DW Machinery is also equipped with a comprehensive range of advanced manufacturing equipment, including a CNC Machining Center, CNC Turning Machine, Inner Hole Grinding Machine, 13-Meter Deep Hole Boring Machine, NC Drilling Machine, Computer-Controlled Nitriding Furnace System, Centrifugal Casting Furnace, PTA Bimetallic Spraying Equipment, Gear Milling Machine, and more.
Parameter
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Material: |
High quality 38CrMoAlA |
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Process: |
Advanced nitriding & bimetallic process |
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Hardness After Hardening & Tempering: |
HB280-320 |
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Nitrided Hardness: |
HV900-1000 |
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Nitrided Case Depth: |
0.45-0.8mm |
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Nitrided Brittleness: |
Less than Grade 2 |
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Surface Roughness: |
Ra 0.4 |
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Screw Straightness: |
0.015mm |
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Alloy Hardness: |
HRC 50-65 |
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Alloy Depth: |
0.8-2.0mm |
Benefits of Film Blowing Screw Barrel
Precision and Consistency in Film Thickness
Film screw barrels ensure uniform distribution of molten plastic resin, resulting in consistent film thickness and excellent dimensional stability. This enhances product performance and reduces material waste.
Enhanced Wear Resistance and Durability
Crafted from high-grade materials such as nitrided steel and bimetallic alloys, our film screw barrels offer exceptional wear resistance and prolonged service life. This minimizes downtime and maintenance costs, ensuring continuous operation.
Optimized Design for Efficiency
With advanced screw geometry and surface treatments, our screw barrels optimize melt homogeneity, cooling efficiency, and line speed control. This improves production efficiency, reduces energy consumption, and enhances throughput rates.
Customization Options
We provide customization options to meet specific customer needs, including screw diameter, L/D ratio, flight design, and material composition. Our engineering expertise ensures that each film screw barrel is tailored for maximum performance and reliability.
The Working Principle Of The Film Blowing Screw Barrel
Material Feeding and Conveying
The journey of plastic in blown film extrusion starts at the hopper. Here, raw plastic pellets drop into the barrel. The single screw barrel for blowing film uses a rotating screw to grab these pellets and move them forward. The screw’s design matters a lot. Deeper flights in the screw’s feed section help carry more material without breaking it down too soon. As the screw turns, it pushes the pellets along the barrel, making sure they move smoothly and steadily.
Melting and Plasticization
Once the pellets move further into the barrel, they start to heat up. The barrel’s heaters and the friction from the screw’s turning action melt the plastic. The single screw barrel for blowing film must melt the plastic evenly to avoid lumps or unmelted spots. The screw’s geometry, like its length-to-diameter (L/D) ratio and compression ratio, plays a big role here. A longer screw gives the plastic more time to melt and mix, which leads to a smoother, more uniform melt.
Compression, Shearing, and Pressurization
As the melted plastic moves forward, the screw’s channel gets shallower. This change compresses the plastic, squeezes out any air, and builds up pressure. The screw also creates shear forces, which mix the melt and break up any clumps or gels. Mixing elements like Maddock or pineapple mixers can help here. They split and recombine the melt, making sure everything blends well without overheating the plastic.
Extrusion Through the Die
After the melt reaches the end of the barrel, it faces the die. The die shapes the molten plastic into a thin tube. The design of both the die and the single screw barrel for blowing film must work together. If the melt is not uniform or the temperature is off, the film can come out with uneven thickness or defects.
- We offer various shipping methods, including sea freight, air freight, and express delivery, depending on the order size and destination.
- Shipping costs will be calculated based on the destination and weight of the package.
- Customers will receive a tracking number once the package has been shipped, so they can track the status of their delivery.
- We strive to ship all orders within 2 business days of receiving the payment.
- In case of any delays or issues with shipping, our customer service team will promptly communicate with the customer to resolve the problem.
- With our careful packaging and efficient shipping methods, you can trust that your products will arrive in perfect condition and on time.