Nitrided barrel screw

—Born for harsh recycling environments, providing long-lasting, wear-resistant protection.

Core positioning:This product is a high-performance screw and barrel assembly specifically designed for processing highly polluting and abrasive recycled plastic materials (such as films, fibers, and waste plastics containing impurities). It utilizes advanced...Ion nitriding surface treatment technologyWhile ensuring core toughness, it also endows it with exceptional surface hardness and wear and corrosion resistance, which is the key to improving the stability, lifespan and output quality of environmentally friendly granulators.

1. Why does environmentally friendly granulation require nitrided screw barrels?

The characteristics of raw materials used in environmentally friendly granulation determine its extremely high abrasiveness:

1. High impurity content:Dust, mud, metal shavings, and other foreign objects.

2. Mixed ingredients:Different plastics may be mixed, resulting in varying flowability and melting points.

3. Corrosiveness:The raw materials may contain residual cleaning agents, acidic substances, or degradation products.

4. More fiber material:For example, woven bags cause continuous scratching on the surface.

Ordinary screw barrelIn this environment, it will wear out rapidly, resulting in:

• Increased gaps lead to uneven plasticization and decreased production.

• Energy consumption is soaring.

• The quality of the product particles is unstable (the color is black and there are crystal spots).

• Frequent downtime for replacements is costly.

II. Product Structure and Core Technological Advantages

Our nitrided screw barrel adopts..."Strong and tough substrate + ultra-hard surface"The composite design concept.

1. Matrix material (internal "bone"):

• High-quality alloy steel (such as 38CrMoAlA):It possesses excellent strength, toughness, and hardenability, providing solid support for the nitrided layer and preventing brittleness and core deformation.

2. Surface treatment technology - Ion nitriding (external "A"):

• Process principle:In a vacuum low-pressure plasma environment, nitrogen/hydrogen gas is introduced, causing nitrogen ions to bombard the workpiece surface at high speed, forming a hard nitride layer through penetration and diffusion.

• Key advantages (compared to ordinary nitriding/chrome plating):

  • Extremely high surface hardness: HV 900-1200(Approximately HRC 65-72 and above), its wear resistance far exceeds that of conventional materials.

  • Excellent wear and corrosion resistance:It has excellent resistance to friction from molten plastic and trace amounts of chemical corrosion.

  • Excellent anti-occlusal properties:The surface is dense and smooth with a low coefficient of friction, effectively preventing material adhesion and screw seizing.

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