The extruder is mainly composed of screw, barrel, transmission system, head connector and electrical control box.

(1) Screw

It is the key part to complete the transportation and plasticization of plastics. Because of its rotation, it pushes the plastics forward, so as to achieve the purpose of compaction, melting, mixing and homogenization. The screw thread is composed of different functional sections, so as to achieve better conveying, compaction, mixing, plasticizing effect and high output. The screw material is made of high quality nitriding steel (38CrMoAlA) by fine machining, nitriding and grinding. It has high corrosion resistance, wear resistance and long service life.

(2) Barrel

The barrel is made of nitrided steel. The inner hole is nitrided to achieve higher hardness, better wear resistance and certain corrosion resistance. There are five groups of heaters on the outer surface of the barrel. The heat is transferred from the barrel to the plastic to melt and plasticize the plastic. There are five temperature measuring points in each part of the barrel, It can be automatically controlled within the temperature range of plastic processing. The fifth heating zone of the barrel is equipped with air circulation cooling, which can accelerate the barrel cooling and improve the accuracy of temperature control

(3) Head flange connector

It is a part connecting the head and barrel, which is heated by a heating ring to prevent the cooling of molten plastics

(4) Transmission system

The transmission system is to make the screw rotate evenly with the necessary torque under the selected process conditions, so as to complete the plasticization and transportation of plastic by the screw. In order to meet the production requirements of various specifications of plastic products, the screw should have different speeds. The machine adopts variable frequency motor to drive the gearbox directly through the coupling, and adopts speed governor to realize speed regulation, The speed of screw can be read directly by the tachometer on the control panel or by the governor

Application of Co extruder

1. Plastic pipe extrusion processing:

It is suitable for processing PP-R pipe, PE gas pipe, PEX cross-linked pipe, aluminum plastic composite pipe, ABS pipe, PVC pipe, HDPE silicon core pipe and all kinds of coextrusion composite pipe.

2. Extrusion processing of profiles:

It is suitable for processing all kinds of small materials, adjusting the speed of extruder and changing the structure of extrusion screw. It is suitable for producing PVC sealing strip, PMMA and other plastic profiles.

3. Plate and sheet processing:

It is suitable for extrusion of PVC, pet, PS, PP, PC, etc.

4. Bar extrusion processing:

It is suitable for extruding other kinds of plastics, such as wire, bar, etc.

5. Modified granulation process

It is suitable for blending, modification and reinforcing granulation of various plastics.

6. Compound extrusion processing

It is mainly used in compound extrusion and mark line extrusion, and various plastic pipe, sheet and profile production lines.

Co Extruder Technical Parameter

1. Screw diameter: 25-35mm

2. The length diameter ratio of screw is 25-30:1

3. Working length of screw: 620-900mm

4. Screw speed: 0-50r / min

5. F series hard gear reducer, model: F67

6. Motor power 0.75 ~ 5.5kW; frequency control

7. Heating power: 1500W. Fan cooling, heating ring, stainless steel protective cover, temperature controller, constant temperature control.

8. Machine center height: 800-1200mm adjustable.

9. The production capacity: 2 ~ 15kg / h

10. Electrical control cabinet control.