Laboratory Parallel Twin Screw Extruder

The Laboratory Parallel Twin Screw Extruder is designed for miniaturized production, experimentation, and teaching of polymer material filling, blending, modification, and reinforcement. This machine offers low material consumption, high efficiency, cost-effectiveness, and occupies a small floor area, making it highly suitable for pre-production R&D, formula synthesis, and more.

Technical Parameters:

1. Screw Diameter: Ф21.7mm
2. L/D Ratio: 40:1
3. Screw: Made from alloy special tool steel, including feeding section, conveying section, compression section, and mixing head, with processes such as hard chrome polishing and superfinishing. Nitriding layer depth is 0.4-0.7mm, and nitriding hardness is HRC55 ~ 60.
4. Barrel Material: Wear-resistant hard alloy
5. Main Motor Power: 4kw
6. Screw Speed: 600rpm
7. Main Frame Heating Power: 3kw
8. Total Installed Power: 10kw
9. Production Capacity: 25kg (Dependent on the process formula of the production material)
10. Material Required: 25kg (Dependent on the process formula of the production material)

Unit Configuration

Twin Screw Extruder

a. Single Screw Forced Feeding System

• Drive Motor: 0.37kw, AC motor
• Frequency Control: Songri frequency control
• Gearbox Speed Ratio: 17
• Direct connection between motor and feed reducer; feed body equipped with a horizontal mixer.

b. Gearbox

• Reduction Ratio: 2.5:1
• Output Shaft Speed: Max 600rpm
• Input Shaft Speed: Max 1500 rpm
• The main engine transmission box integrates torque distribution and uses a parallel three-axis design for compact structure. Imported bearings are used for reduction, torque distribution, and two output shaft radial bearings.

c. Main Frame Motor

• Main Motor: 4kw (Siemens Bede AC motor)
• Motor Speed (Max): 1500rpm

d. Screw

• Screw Diameter: φ21.7mm
• L/D=40:1
• Block type screw
• Screw core shaft made of 40CrNiMoA material; screw element and core shaft connected via involute for high strength and convenient assembly and disassembly.
• Screw element made of high-quality high-speed tool steel W6Mo5Cr4V2, heat-treated by high-temperature vacuum quenching.
• Overall Hardness HRC62-64

e. Barrel

• Barrel Material: 38 Nitride Steel as Base Material
• First barrel is a feeding barrel, sixth barrel is a vacuuming barrel, seventh barrel is an extrusion barrel; the rest are closed barrels.
• Soft Water Circulation System
• Barrel uses soft water cooling
• Soft water tank is separated from the body for easy cleaning and maintenance
• Jock solenoid valve
• Water pipe is chrome-plated copper pipe
• Cooling mode: Water cooling
• Cooling pump: 120W
• Tank volume: 30L

f. Heating System

• Cast aluminum heating plates in barrel sections
• Quick opening head with heating rod
• Melting temperature measured by thermocouple; max temperature reaches 260°C. Material pressure measured by pressure sensor.

g. Vacuum Degassing Device

• sk-0.15 water ring vacuum pump
• Drive Motor: 0.75kw

h. Quick Start Head for Water-Drawn Strip, Mouth Die 2 Holes - φ3.5mm

i. Electric Control System

• 3 × 380V, AC 50Hz
• 4KW AC motor for twin-screw part with Songri frequency conversion governor as speed regulation device
• Feeder controlled by PLC
• Pressure gauge range: 0-25Mpa
• Electrical control cabinet operated by PLC

j. Interlocking Control System

• Feeding system interlocked with main engine; main engine must start before feeder
• Pressure system interlocked with main engine; stops main engine and feeding materials in case of overpressure
• Current interlocked with main machine; stops main machine and feeding materials when current is over

k. One Set of Pelletizing Auxiliary Machine

• 0.5~1m Stainless Steel Sink: 1pc
• 0.37kw Dryer: 1pc

l. Spare Parts

• Twin Screw Element 160mm
• Asbestos Gloves: 2 Pairs
• Toolbox: 1 Set