Bimetallic Nitride Conical Twin Screws WPC PVC PE Industry / Extruder Screws And Barrels

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.

2 . Main Specification

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°

4 . Bimetallic Special Materials
Hot processed steel: 1.2344,H13,W360,SKD61,
Cold processed steel: 1.2379,K340,D2,DC53,SKD11,W110
HSS:1.3343,1.3243, SKH51,SKH55,
HIP Powder HSS:CPM9V,SK739,SK726,SK742,GH113
Screw flight top use Stellite plasma alloy welding, alloy types: cobalt base,nickel base, iron base alloy.
We use special alloy powders being sprayed and welded on the screw’s ridge,
and we use different alloy and welding methods for the screw of different functions.

5 . Product Show