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Parallel Twin Screw Extruder

Contactor  Schneider brand
Driving Motor  Siemens AC motor
Temperature Controller  Omron brand
Inverter  ABB brand
Screw and barrel  Bi-metallic or SKD-11
Heater Ceramic heater with SS cover
Gearbox  Chang brand
Air Switch  LS brand belongs to LG Group

WeCoEx Can be Your Trustworthy Parallel Twin Screw Extruder Supplier in China

Your Premier Parallel Twin Screw Extruder Manufacturer

The parallel twin-screw extruder has a co-rotating and counter-rotating model, and they are used for different applications. Co-rotating parallel twin screw extruder has more wide usage than counter-rotating twin-screw extruder.

Parallel twin-screw extruders can be used in Engineering Plastic Industry, like the car industry, masterbatch material, blowing mold industry, blowing film industry, PVC cable industry, plastic pipe, plastic recycling, and so on.

The parallel twin-screw extruder has higher capacity when compared to the conical twin-screw extruder, as it has higher torque, but the price of parallel twin screw extruder is also high, like better gearbox material, better material of screw and barrel.

For PET material, we need to use a co-rotating parallel twin screw extruder in PET pelletizing extrusion line and PET sheet extrusion line, as we have a high standard for PET products, like transparency.

For counter-rotating parallel twin screw extruder, before it was very popular in the SPC flooring industry, but now we suggest client to use a conical twin-screw extruder to make it for unstable by counter-rotating parallel twin screw extruder, and it also has higher repair and maintenance cost for you.

The screw design between the co-rotating parallel twin-screw extruder and counter-rotating parallel twin-screw extruder is different, the co-rotating twin-screw extruder is a module by screw elements, but counter-rotating twin-screw extruder is overall in screw design, we cannot change the screw design, and we also cannot use one counter-rotating twin-screw extruder for different material, we need to design the screw according to your material and products.

Parallel twin-screw extruder formed earlier than conical twin-screw extruder, refer to the application, the conical twin-screw extruder is wider than parallel twin screw extruder, and the biggest reason is his low production cost.

When you want to establish a compounding line or soft PVC cable pelletizing line, welcome to check our parallel twin screw extruder.

vacuum auto loader
single screw
simens motor
cheng brand gearbox
electric pats of single screw extruder
contactor for single screw extruder
cooing fan for single screw extruder

Parallel Twin Screw Extruders FAQs-The Complete Guide

Here is an FAQ guide for your understanding the basics of parallel twin screw extruder.

Parallel twin screw extruders are in huge demand for compounding modified plastic wood-plastic.

The guide comprises all the details related to parallel twin screw extruder.

Q1. What are Parallel Twin Screw Extruders?

There are two types of parallel twin screw extruder in the market, which are co-rotation twin screw extruder and counter-rotating parallel twin screw extruder.

The counter-rotating A parallel twin screw extruder is a wide used in plastic pipe extruding line, plastic profile extrusion line, plastic board extrusion line and SPC flooring extrusion line.

                                                                                                                             Parallel Twin Screw ExtruderFigure 1 Parallel Twin Screw Extruder

The co-rotating twin screw extruder is mainly used for compounding of plastic and to modify different plastics.

The co-rotating parallel type has high speed of 1000rpm and normal speed of 600rpm.

They have parallel screw barrel, so we call both of them parallel twin screw extruder.

Q2. What are the Different Components of Parallel Twin Screw Extruders?

There are different components of parallel twin screw extruder, including the following:

  • Twin Screws

parallel twin screws

Figure 2 Parallel Twin Screws

  • Gearbox

gear box

Figure 3 Gear Box of Parallel Twin Screw Extruder

  • AC motors

AC motor for parallel twin screw extruder

Figure 4 AC Motor for Parallel Twin Screw Extruder

These parts are generally present in all the parallel twin screw extruders by all extruder machine  manufacturer.

Q3. How Does a Parallel Twin Screw Extruder Work?

Working of parallel twin screw extruder

Figure 5 Working of Parallel Twin Screw Extruder

The working principle of parallel twin screw extruder is not different from conical twin screw extruders. In it, its barrel is driven by motor whereas the extrusion material enters through hopper.

Though the structure of parallel twin screw extruder is different from single screw extruder yet their working way is same.

Both run by motor and gearbox reduces the speed, however parallel twin screw extruder has higher requirements and standard.

Q4. What are the Features of Parallel Twin Screw Extruders?

The key features of Wecoex parallel twin screw extruders make them unique and different from other market products. These features include:

  • They are capable of producing masterbatches, plastic products, and to recycle pellets.
  • They give a higher output value than other extruder manufacturer.
  • Parallel twin screw extruders have a capacity of extruding 150kg/h-2000kg/h.
  • The power consumption is also low because of AC motorsand high quality VFD.
  • The screw barrel can be customized dimensions for custom orders.

Q5. What is the Purpose of Using Parallel Twin Screw Extruders?

The most common purposes of using parallel twin screw extruders are masterbatch production, compounding of wood-plastic, PVC products and compounding of plastic pretty fast and efficiently.

However, all parallel twin screw extruder require connection with molds and different down-stream machines to produce various products.

PVC Compounding

Figure 6 PVC Compounding

Q6. Why Does a Parallel Twin Screw Extruder Mix Better than a Single Screw Extruder?

Wecoex parallel twin screw extruders are always very efficient in mixing as compared to single screw extruder.

It is mainly because of the presence of two intermeshing screws instead of one, the material can be mixed between the two screws.

Comparison of SIngle Screw and Parallel Twin Screw Extruder

Figure 7 Comparison of Single Screw and Parallel Twin Screw Extruder

Also, the screws of parallel twin screw extruders are designed in a way that prefers the mixing and meshing with precision it means that there is not enough gap between the two screws.

The plasticizing capability of a parallel twin screw extruder is also far better than the single screw extruder.

Q7. How Does Starve Fed Improve the Efficiency of Parallel Twin Screw Extruders?

The machines like parallel twin crew extruders are given starve-fed.

It is due to the fact that it increases the melting action of the compounds.

Also, it enhances the mixing action.

Initially, the extruders are not filled completely with polymers so that the pressure does not get a chance to develop there.

Later, the polymer is fully fed and adequate pressure is built inside the machine to push it to the die.

The working efficiency of parallel twin screw extruders is enhanced by starve feeding process.

It is a process that allows the addition of plastic monomers is not as a whole fed into the extruder machine.

starve feeding

Figure 8 Starve Feeding Operation

Instead, in starve feed, you feed the monomers gradually into the parallel twin screw extruder vessel at a steady rate that makes the monomers used by the reaction before the entry of the next monomer batch.

Q8. How Can You Choose the Right Parallel Twin Screw Extruders for Your Products?

Well, it depends on the the plastic products you want to produce.

There are so many options available in the market for parallel twin screw extruder, and we list some key points that you must have in mind.

  • The products you want to make and raw material.
  • Check the output range of the extruder.
  • Check the brand name of main parts, like screw barrel, gearbox, motor and electrical parts.

Q9. How Can You Purchase a Parallel Twin Screw Extruder?

Wecoex machine offers a huge range of parallel twin screw extruders at your affordable prices.

For this purpose, all you need to do is tell us your demands and the application for which you want to get a parallel twin screw extruder.

After the order, we will deliver you the right product at your door step in less time.

Wecoex parallel twin screw extruders present various advantages and all their products are made under strict quality control standards.


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