Nitridation Depth: |
0.5-0.8mm |
Nitridation Fragility: |
≤ Grade 1 |
Screw Shaft Straightness: |
0.015mm |
Bimetallic Depth: |
≥2mm |
Nitridation Hardness: |
950-1020HV |
Surface Roughness: |
Ra 0.4um |
Bimetallic Hardness: |
HRC55-62 |
Product Description
Conical twin-screw extruder is composed of barrel, screw ,gear transimission system,measurable feeding,vacuum system,heating,cooling and electronic control components.
It is mainly used in plasticizing,extruding and forming PVC pipe ,plate,sheet,film,profile,and granule,etc
Conical twin screws are commonly used in the WPC (Wood Plastic Composite), PVC (Polyvinyl Chloride), and PE (Polyethylene) industries for extrusion processes. They are specifically designed to meet the requirements of these industries and are used in extruder machines. Extruder screws and barrels are essential components of an extrusion system. The screw is responsible for melting and conveying the polymer material, while the barrel provides the necessary heat and pressure for the extrusion process. Conical twin screws and barrels are designed with a tapered shape that allows for efficient mixing and melting of the polymer materials.
Here are some key features and benefits of conical twin screws and barrels for the WPC, PVC, and PE industries: Mixing Capability: Conical twin screws are designed to provide excellent mixing of the polymer materials, ensuring uniform distribution of additives, fillers, and wood fibers in WPC extrusion. This leads to improved product quality and consistency. Melting Efficiency: The tapered design of conical twin screws allows for increased surface area during the melting process. This results in better heat transfer and faster melting of the polymer materials, reducing energy consumption and improving productivity. Self-Cleaning: Conical twin screws have a self-wiping mechanism, which helps in reducing material buildup and minimizing the risk of cross-contamination, especially when switching between different materials or colors. Higher Throughput: The design of conical twin screws enables higher throughput rates compared to other types of screws. This is beneficial for industries requiring high production volumes. Versatility: Conical twin screws can process a wide range of materials, including rigid and flexible PVC, various types of polyethylene (HDPE, LDPE, LLDPE), and WPC compounds. This makes them suitable for different applications within the WPC, PVC, and PE industries.
Conical twin-screw extruder is composed of barrel, screw ,gear transimission system,measurable feeding,vacuum system,heating,cooling and electronic control components.
It is mainly used in plasticizing,extruding and forming PVC pipe ,plate,sheet,film,profile,and granule,etc.
1 . Main Advantages
1– Low shearing rate, uneasy degradation,plasticization uniform and agglomeration.
2– Reliable quality ,wide application range and long servicing life.
3– Automatic temperature control, vacuum gas exhaustion, oil cooled screws.
4— forced feeding and self-cleaning mechanism.
Specification |
Working length(mm) |
Extrusion ability (kg/h) |
Rotation speed of screw (rpm) |
Φ35 / Φ77 |
810 |
40-70 |
5-50 |
Φ45 / Φ90 |
990 |
50-80 |
5-45 |
Φ50 / Φ105 |
1070 |
100-150 |
4-45 |
Φ51 / Φ105 |
1220 |
100-150 |
4-45 |
Φ55 / Φ110 |
1220 |
120-180 |
4-40 |
Φ60/ Φ125 |
1320 |
150-200 |
4-40 |
Φ65 / Φ120 |
1440 |
200-250 |
4-40 |
Φ65 / Φ132 |
1440 |
200-250 |
4-40 |
Φ70 / Φ140 |
1460 |
220-300 |
4-40 |
Φ75 / Φ150 |
1480 |
250-300 |
4-35 |
Φ80 / Φ143 |
1800 |
300-360 |
4-35 |
Φ80 / Φ156 |
1660 |
300-360 |
4-35 |
Φ92 / Φ188 |
2000 |
400-500 |
4-35 |
3 . Bimetallic Conical Screw Parameter
Basic Steel: 38CrMoAIA
Heat treatment hardness: HB260°~320°
Nitriding hardness:HV950°~1000°
Nitriding depth: 0.50~ 0.7mm
Nitriding brittleness:≤ grade 2
Roughness:Ra0.4
Screw straightness:0.015mm
Chrome plating hardness:≥950HV
Chrome thickness: 0.05~0.10mm
Bimetal depth: 1.0~2.0mm
Bimetal hardness:HRC56°~65°
5 . Product Show