Barrel and screw

—The “heart of reshaping” from recycled plastics, defining value with superior plasticizing capabilities and ultra-long lifespan.

Core positioning:The barrel and screw are components of a plastic recycling granulation extruder.Core plasticizing unitIt is hailed as the "heart component." This product is specifically designed for handling recycled plastics with complex compositions, high levels of contamination, and uneven flow.Scientific geometric design, top-grade wear-resistant materials and reinforcement processesThe efficiency of conveying, stable plasticization, strong self-cleaning and ultra-long service life directly determine the output, energy consumption and particle quality of the entire granulation line.

I. Extreme Requirements for Barrel and Screw in Recycling Granulation

The inherent properties of recycled plastics present the barrel and screw with more severe challenges than those encountered when processing virgin materials:

1. High abrasion resistance:Residual in raw materialsSand, dust, fiberglass, inorganic fillerHard impurities, such as these, become the "abrasive" for wear.

2. Highly corrosive:Recycled materials may containAcidic substances, cleaning agent residues, degradation productsIt causes chemical corrosion to the metal surface.

3. Thermosensitivity and fluctuation:Recycled materials have complex thermal histories and wide molecular weight distributions, requiring gentler and more precise plasticizing temperature control to prevent localized overheating and degradation.

4. Difficulties in conveying and plasticizing:EspeciallyLightweight film, fluffy fiberMaterials with low bulk density are prone to slipping in the feeding section; mixing materials with different melting points can cause uneven plasticization.

Inferior or poorly designed barrel screws can lead to:

• The wear gap increases rapidly.Declining output and soaring energy consumption。

• Uneven plasticization, resulting in the appearance of particles.Raw materials, color difference, and burnt particles。

• Caused by wear or corrosionMetal pollutionThis affects the purity of the product.

• Frequent downtime for replacementThe overall cost of use is extremely high.。

II. Core Product Design and Technological Advantages

We adopt"Systematic collaborative design + graded wear-resistant solution + precision manufacturing"The concept ensures the optimal match between the barrel and the screw.

1. Screw: Specially designed for recycled materials.

• Length-to-diameter ratio (L/D):useHigh length-to-diameter ratio (typically 28:1 to 40:1) designIt provides a longer plasticizing path and more thorough mixing and degassing time, making it suitable for complex recycled materials.

• Segmentation functionality optimized:

  • Feeding section:Deepen the thread groove, optimize the thread helix angle, and equip withWear-resistant ribs or slotted bushings