20mm Mini Laboratory Extruder Parallel Twin Screw Extruder Plastic Exustrion Machine
 
Yongjie laboratory mini extruder SJSL20 is widely used among our customers of universities, research center, and factory R&D department for the testing of formula, compounding etc.
Quick details
Power:5.5kw
Screw diameter:21.7mm
Screw material:38CrMoAL
Barrel diameter:22mm
Barrel material:38CrMoAL
Output:around2-15kg/h
Cutting way: water strand, air cooling strand also available
Warranty:one year
Lead time:45 days after deposit
Heating power:16kw
Heating zones: 7zones
Barrel length:120*7=840mm
Control type:PID

Gear box
Transmission gear: Parallel tri-axial structure is combination of reduction and matrix. The gear is made of high quality alloy (20CrNi2Mo). It had been treated by cementation heat process, the precision grade can reach6th. It guarantees the tooth surface is high speed, overloading, low noise and high torque.
Drive bearing: The brand of axletree: Japanese NSK.
Lubrication: Gear bearings in the gear box will be of oil immersed. There is hydraulic lubrication in the gear engagement and gear bearings.
Cooling: Lubricated cooling adopts shell and tube cooler and circulated water cooling method.
 
Screw
Diameter:￠21.7mm
L/D:40:1
Direction of rotation: Co-rotating
Screw & elements: W6Mo5Cr4V2 (6542#) high speed tool steel that had been treated by the vacuum hardening process with the hardness of the surface is HRC58-62.Molding through dedicated grinding machine. The cleanliness is much better than products out of traditional process.
Core axle: High quality alloy steel 40CrNiMo that with high tenacity and durability. It had been treated by the hardening and tempering process.
 
Barrel
1). Structure: The first section works for main feeding, and the sixth section is set up for vacuum venting, the others are blocked.
2). Material: The material of the barrel 38CrMoAlA, surface hardness: HV950-1050, depth 0.5-0.7mm 3). Heating: Adopt multiple step format electric heating. All zones are cast copper heater. The total heating power is 16KW and the max heating capacity every section can reach
500℃.
4). Cooling: Adopt soft water cooling system in the barrel and tap water cooling way outside barrel. The circulation pipes are made of stainless steel and the water inflow regulating valves are stainless valves.
The brand of electromagnetic valve is DANFOSS.
5). Length: 120*7=840mm
 
Pre-sales service
♦1. Inquiry and consulting support.
♦2. Selecting economical and suitable extruder and related machines for customers.
♦3. Providing technical details of machine.
♦4. Providing means of trial performance for customer.
♦5. Factory tour & assistance of invitation letter when needed.
Sales service
♦1. Recommending engineering conditions required for installation.
♦2. Communicating on time the manufacturing status of machines.
After-sales service
♦1. Engineers available to service machinery overseas in installation, commissioning and training.
♦2. Filing in detail customer’s order information.
♦3. Providing long-term maintenance service and spare parts.
♦4. Giving technical support to customer for developing new product.
♦5. Providing free maintenance for a year.
Photo of Laboratory Mini Extruder 

Main technical data of various model of twin screw extruder pelleitizing machine