Pelletizer roller knife

—A combination of precision and durability ensures uniform particle size and high efficiency and stability.

Core positioning:This product is a high-performance pelletizing roller knife specifically designed for environmentally friendly plastic pelletizing machines (especially for processes such as water ring pelletizing, underwater strip pelletizing, and air-cooled pelletizing). It addresses the characteristics of recycled plastics, such as complex composition, potential trace impurities, and uneven melt strength.Special materials and top-level heat treatment processesTo ensure the blade maintains its performance under long-term, high-intensity, and harsh working conditions.Sharp, wear-resistant, and impact-resistantThis is crucial for ensuring pelleting quality, efficiency, and continuous, stable operation of the equipment.

I. The stringent challenges of environmentally friendly pelletizing rollers

Pelletizing is the final step in molding plastic melt into pellets, and the performance of the roller cutter directly affects the quality and cost of the final product.

1. Severe wear and tear:The extremely fine mineral impurities (such as dust) that may be carried in recycled materials can cause abrasive wear on the cutting edge.

2. High impact and toughness requirements:Uneven temperature or hardness of the melt strip, as well as occasional incomplete plasticization, require the cutting edge to have good impact toughness to prevent chipping.

3. Corrosion resistance:In water ring pelletizing or underwater pelletizing environments, the cooling water (which may be circulating water) has a certain corrosive effect on the cutting tools.

4. Enduring sharpness:The blade needs to remain sharp for a long time to ensure the cut particles are sharp.No stringing, no burrs, uniform lengthA dull blade can lead to material extrusion, pellet sticking, and increased powder production.

II. Core Product Design and Technological Advantages

Our roller cutter adopts"Optimal materials + precision machining + strengthening treatment"A three-in-one manufacturing philosophy.

1. Preferred materials (the cornerstone of performance):

• High-end tool steel:Using high purityD2, DC53, SKD11, H13Alternatively, custom powder metallurgy high-speed steel can be produced. These materials inherently possess high hardness, high wear resistance, and good red hardness (the ability to maintain hardness at high temperatures).

• Proprietary alloy formula:To achieve the best balance between wear resistance and impact resistance, the alloy element ratio was adjusted and the carbide distribution was optimized, taking into account the characteristics of plastic recycling.

2. Precision manufacturing process:

• CNC precision machining:The tool body and tooth profile are machined using high-precision CNC machine tools to ensure...Precise dimensions and excellent dynamic balanceIt operates at high speed without vibration and with low noise.

• Blade geometry optimization:

  • Cutting edge angle:Design the most suitable cutting edge angle for different plastics (such as soft PE/PP film materials or harder PET/engineering plastics) to achieve...Clean and crisp cutsInstead of squeezing and cutting.

  • Chip removal groove design:The smooth chip removal channel prevents chips from sticking together and reduces heat buildup.

3. Top-tier heat treatment and surface strengthening (core advantage):

• Vacuum quenching + cryogenic treatment:This ensures uniform internal structure and consistent hardness of the blade body, eliminates internal stress, and greatly improves dimensional stability and overall toughness.

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