Application:

PVC profile(Door & window) / WPC(PVC,PE) / PVC foam board / PVC pipe / PVC compound etc

 Specifications

1. Bimetal conical twin screw barrel for extruder machinery of Chinese Standard
2.Base Material: 38CrMoAlA;
3,Nitrided or bimetallic

Conical twin screw barrel application

1) PVC pipe extrusion line;                   

2) PVC sheet extrusion line;

3) PVC & WPC profile extrusion line;    

4) PVC granulation line;

5) PVC foaming production line;

The raw material can be new and recycle, the material can compound calcium powder 5% - 300%.

Conical twin screw extruder cylinder and screw are made of high quality 38CrMoAIA, 42CrMo, 304 stainless steel and other materials from famous manufacturers at home and abroad. Advanced nitriding process, corrosion resistant and wear-resistant bimetal spraying process are adopted to meet the technical requirements. Specification optional SJS 51, SJZ 55, SJZ 65, SJZ 80, and the hardness: HB240 degrees -280 degrees; nitride hardness: HV850 degrees -1000; nitriding depth: 0.45-0.7mm; brittle nitride: less than two grade; chrome layer thickness: 0.05-0.10mm.

Conical twin screw and barrel technical specifications:

ф35/75	ф40/84	ф45/90	ф45/97	ф45/100	ф50/105	ф51/105
ф55/110	ф55/120	ф58/125	ф61/125	ф65/120	ф65/132	ф68/147
ф70/140	ф80/143	ф80/156	ф80/174	ф92/188	ф95/191	ф105/216

Main Technical Parameters and Structural Features:

Materials and Processing Technology: The barrel is typically made of high-quality nitrided steel (such as 38CrMoAlA) and undergoes nitriding treatment to improve surface hardness and wear resistance. The nitriding layer depth is generally between 0.4–0.8mm, and the surface hardness can reach over 930HV, ensuring stability and lifespan during long-term operation.

Structural Form: Conical twin-screw extruders typically employ an integral barrel structure, which helps ensure coaxiality and strength, and reduces the risk of leakage. Some large-scale equipment may also adopt a segmented modular design for easier processing and maintenance.

Temperature Control and Cooling System: The barrel is equipped with a cast aluminum heater or resistance heater, providing high heating efficiency, rapid and uniform temperature rise. It also features a cooling fan or oil cooling system for precise temperature control, preventing material overheating and decomposition.