China Professional Twin Screw Extruder Manufacturer — Granuwel

Granuwel’s twin screw extruders are widely used in high-performance processing equipment for different fields such as plastics, chemicals, food and pharmaceuticals. They are used for extrusion, pelletizing, material handling, etc. The twin-screw extruder range includes GTE-B Series Twin Screw Extruder, GTE-C Series Twin Screw Extruder and GTE-D Series Twin Screw Extruder.

Granuwel has innovative extruder manufacturing technology and the highest standards of quality to meet the needs of a diverse customer base. If you are looking for a professional manufacturer of twin screw extruders that can provide quality products and fast delivery, Granuwel will be your first choice.

Twin Screw Extruders Specifications

GTE-B series Twin Screw Extruder

ModelDiameter(mm)Max. L/DSpeed(rpm)Power(kw)Output(kg/h)
GTE 52B51.46860055150~250
GTE 65B62.46860090200~350
GTE 75B71.468600132400~600
GTE 85B8168600250600~900
GTE 95B9368600315800~1200
GTE 120B116685004501300~2000
GTE 135B133685009002500~4000

GTE-C series Twin Screw Extruder

ModelDiameter(mm)Max. L/DSpeed(rpm)Power(kw)Output(kg/h)
GTE 52C51.46860090250~350
GTE 65C62.468600160400~600
GTE 75C71.468600250700~1000
GTE 85C8168600280800~1200
GTE 95C93686004501300~2000
GTE 120C116685005501500~2200
GTE 135C1336850012003500~5000

GTE-D series Twin Screw Extruder

ModelDiameter(mm)Max. L/DSpeed(rpm)Power(kw)Output(kg/h)
GTE 52D51.468600110300~500
GTE 65D62.468600250700~1000
GTE 75D71.468600315800~1200
GTE 85D81686003551000~1600
GTE 95D93686005501500~2200
GTE 120D116686009003000~4500
GTE 135D1336860018005500~8000

Main Parts of Twin Screw Extruder

Material of the gear 20CrNi2MoA, carburized Hard Face Gear
Hardness of  gear surface HRC 58-60
Ratio 2.5
Speed input/output 1500rpm/600rpm
Output torque to Screw Involute spline transfer torque
Bearings imported NSK/INA bearings, Integrated thrust bearing assembly
High Torque Screw

Screw elements materials

W6Mo5Cr4V2, the surface hardness after high temperature vacuum quenching.

Hardness: HRC58-64

Mainly including

Conveying element, mixing element, reverse element, kneeding element.


Co-rotating parallel modular closely intermeshing.

Core shaft


high strength alloy steel (40CrNiMoA) material, high strength quality adjustment, hardness 300-350HB, compound forging, improve strength and toughness, ensure the transmission of screw torque.

Control System 1

Speed control:
Adopt frequency conversion control with brand frequency converter ABB or YASKAWA.

Temperature control:
Temperature control meter adopt Japanese Omron temperature control meter, double channel, PID algorithm, intelligent type, or adopt PLC(Programmable and Logical Control) with Siemens touch screen and intelligent temperature control meter.

Over loading protection:
The main motor and feeder have the functions of over current, under voltage, phase absence, over heat and shutdown protection.

Interlocking control:
Interlocking control of main motor with feeder, gear box lubricating oil pump, melt pressure sensor, melt temperature controller. Cooling solenoid valve interlocking with water pump to prolong the service life of solenoid valve.

Wide application experience

Biodegradable plastic is a plastic that is degradable by natural microorganisms like bacteria, fungi and algae. An ideal biodegradable plastic is a polymeric material that performs well, can be fully decomposed by microorganisms after disposal, and ultimately becomes a component of the carbon cycle in nature through inorganization.

Color masterbatch is an integral part of the plastics industry. Not only can it give color to plastic products, increase the value of goods, enhance certain performance of plastics, but also can give particular optical properties to materials.

Started in the 1940s, the new functional polymers, which primarily include all kinds of engineering plastics (such as PA, PC, ABS, PET, PPS, etc.), are already used in electronics, electrical appliances, automotive, transportation, aviation, defense and military industries, etc.

Filler masterbatch is available for processing plastic films, garbage bags, shopping bags, undershirt bags, packaging bags, etc. It has excellent dispersion, blown film without white and black spots, and high fineness to ensure the luster and toughness of the product.

Non-crystallization dry PET sheet extrusion offers several advantages. It is used to produce PET/PLA sheet without the energy consumption of pre-drying crystallization and adapting to the production of materials with high output, low energy consumption and high plastic quality.

The PET waste plastic bottle cleaning line means that the waste plastic bottles are de-labeled by the de-labeling machine, pulverized by the crusher, and then processed by cleaning and drying equipment, so that the recycling and integration of waste plastic bottles becomes a new type.

Thermoplastic Elastomer has extensive adjustable hardness and physical properties. Also, it doesn’t need to be vulcanized, is recyclable, and can reduce costs, so the application areas are relatively wide including seals, automobile interiors, adhesive coated materials, various pipe fittings, etc.

What is Twin Screw Extruder?

A twin-screw extruder is a machine that consists of two intermeshings, co-rotating screws that are mounted on a splined shaft inside an enclosed barrel. The screws are compact and self-wiping, which eliminates stagnation zones throughout the processing section. This leads to high efficiency and perfect self-cleaning.
Twin-screw extruders are used in the polymer, chemical and food industries for mixing various consumer products such as:

What is the difference between single screw and twin screw extruders?

Twin screw extruder has good feeding characteristics for powder processing. It has better mixing, venting, reacting and self-cleaning features than single-screw extruders. It also shows its superiority when processing plastics and blends with poor thermal stability. But today, single-screw extruders are also moving toward high speed, efficiency and specialization.

Advantages Of Co-rotating Twin Screw Extruder

The co-rotating twin-screw extruder is easy to open, so you can observe the degree of wear of threaded elements, barrel lining and other parts anytime, so that you can replace them in time and effectively to avoid wasting products due to parts damage.

Multiple processing functions such as melting, mixing, venting, reacting, etc. can be handled flexibly on one co-rotating twin-screw extruder machine.

The co-rotating twin-screw extruder has a narrow residence time distribution, better convective heat transfer, and a precisely controlled temperature profile. Thus, better product quality stability can be achieved.

Usually, after the screw temperature is reached, the temperature of the mold has not yet reached the inevitable target, so in this case, people usually keep the screw warm and then gradually raise the temperature of the mold to the set temperature before starting the machine, which is characterized by high efficiency and energy saving.

The co-rotating twin-screw extruder has an excellent self-cleaning function. And the residence time of material is very short, not easy to produce local degradation and deterioration.

Compared with single-screw extruders, twin-screw extruders perform better in solid and melt transport of materials, and the mixing of materials is more adequate due to the combined operation of twin-screws. Therefore, it has the advantages of high output, good quality and high efficiency.

Tips For Twin Screw Extruder Operation

1. The circulating water for the cooling system of the twin-screw extruder barrel should be distilled or demineralized water.

2. The screw should only be turned on at low speed and the idling time should not exceed two minutes. After feeding, the speed should be gradually increased only after waiting for the material to come out of the die hole of the head.

3. When there is material in the twin-screw extruder head, it must be heated. Assembly and disassembly can only be done after the material has softened.

4. There is also an electrical interlock between the feed motor and the main motor. This means that when the main motor of the feed motor does not stop, the main motor cannot stop either. When the main motor does not start, the feed motor cannot start either.

5. When the twin-screw extruder is running, be careful not to bring any metal impurities into the raw material used for production.

buyer guidance

About the model, we have the B,C and D series.

Type B equipment is medium and high torsion equipment, it has low torsion transmission box, and the motor power will be relatively small. Besides, its output is relatively low, the unit output energy consumption is relatively high, but it has the advantage of the economic equipment price and less maintenance cost.

C, D type equipment is high torsion equipment, its supporting gearbox can be divided into 8, 11 13 or more according to the torque grade. The higher the torque grade, the greater the motor power that can be matched with the gearbox, and the higher the output. This kind of equipment is mostly special equipment for large output. In order to avoid frequent replacement of raw materials and cleaning machines, we suggest that customers process only one system of granulation with one equipment.

First of all, the buyer need to determine how much output is needed and the kind of the plastic carrier, such as filler masterbatch or the color masterbatch or the functional masterbatch. We will recommend the appropriate model of twin screw extruder according to the specific materials and production capacity.

 The most important thing is to choose the appropriate cutting method according to the processed materials. For example, fully degradable plastic PBAT PLA can not be cooled with water, however, engineering plastics, high temperature plastics, special plastics must be cooled by water.

 For some reactive extrusion, monomer polymerization and other blending reactions. We communicate with customers about the reaction duration of materials and recommend the appropriate screw speed. A longer aspect ratio is recommended to ensure the residence time in the material cylinder of the material, in order to achieve sufficient reaction and improve the degree of reaction and polymerization.

Double screw can process almost all kinds of plastic and some kinds of rubber. If according to the processing industry classification, can be divided into the following types

1.Color masterbatch industry

the base material of color masterbatch is plastic. These plastics include PP PE ABS PBT PET PVC and they mix with pigments or dyes to make the color masterbatch, the general color masterbatch cold pull strip with water. The general color masterparticles are small yield machines. The maximum output is 300kg / h, we recommend customers to choose 35 40 52 65, B,C,D type can be. The output varies from 30-300kg, in addition, the color base material industry in the more special black masterbatch processing, because the carbon black is very small, the particle size is very small, it is difficult to use conventional equipment to add to the high content, we recommend customers to use the form of mixer and double screw combination, can use 65, 75, 95 machine, the output can do 300-800kg / h, carbon black content can reach 40-45%, black masterbatch grain using water ring cutting or underwater cutting. And the black female granulation machine does not advise customers to clean up the screw. For the production of white female in the color female industry can be the same configuration as the black female, because the TiO 2 weight is light, it is difficult to directly feed the double screw, so we prefer the compact er. Then add double screw granulation, use 65.75.95 machine, the output can do 300-1000kg / h.

2.Filling modification industry

Mainly used in plastic packaging industry, plastic carrier for PE PP PS PVC, etc., filler for calcium carbonate, talcum powder and so on.

Some engineering plastics such as PA ABS add iron powder, aluminum powder, magnetic powder, ceramic powder and so on, which are used as conductive materials. We recommend customers to use B,C,D series equipment such as 50, 65, 75, 95. The granulation method is air-cooled hot cutting, water ring hot cutting or drawing strip cutting.

3.Reinforced modification of engineering plastics

PA ABS PC PPS and other engineering plastics are blended with glass fiber or carbon fiber. It is used in the automobile industry. In the home appliance industry and other occasions, water-cooled strip granulation is generally used for this kind of reinforced and modified granulation, and the equipment recommends the use of BCD transmission box for 35, 52, 65 and 75. The output ranges from 30-800kg/h.

4.Functional masterbatch

Mainly refers to flame retardant, anti-aging, anti-ultraviolet and other plastics to enhance some specific functions of plastic modification, this kind of masterbatch dosage is small. Therefore, we suggest that customers use lower production equipment and use water-cooled strips for granulation. We recommend 35, 52, 65 machines for equipment.  The B,C, D type can be selected according to the customer’s preference.

5.Granulation of all kinds of cable materials

 including PE sheath material, insulating material PE cross-linked cable material, PVC cable material, low-smoke halogen-free cable material and so on. The use of  the cable material and the carrier is different, so the equipment selected is different. We can recommend it according to the specific requirements of our customers.

6.Reactive extrusion

mainly used for some special plastics Polycondensation, polymerization, devolatilization and other different materials of different processes, equipment requirements are also different.

7.Bio-based fully degradable plastics

For environmentally friendly fully degradable plastics such as PLA and PBAT, we recommend that customers use 65, 75, 95 machines and air-cooled strips for granulation. The output varies from 200 to 900kg/h.

There are three kinds of control systems for Granuwel’s twin-screw extruder:

1.Traditional instrument button operation.

The heating system is controlled by solid-state relay and the temperature control meter is controlled by PID dual-channel. The temperature control is accurate, simple, intuitive and operable. The control system is suitable for most factories, which often need to clean screw equipment and replace factories that process raw materials.

2.PLC touch screen control system

Mainly adopts Siemens S7 series programmable controller. Through PLC control, it realizes intelligent and efficient management in the production process, and realizes on-line monitoring of quality control. Storage and tracking of process formulations. The control system is mainly used in large automatic factories and scientific research institutions.

3.PC control system:

The industrial PC developed based on the operating system supported by the industrial computer PC has gradually matured. It can realize the perfect cooperation of industrial equipment and industrial automation, can realize the online use of multiple devices, and can realize remote operation, monitoring and so on. The operating system is suitable for intelligent chemical factories such as industrial PC.

The warranty period of the mechanical part of the whole machine is 18 months (except if the machine is damaged by human factors). Some of the electrical components use Siemens components, Siemens touch screen and control module to provide global joint protection services. We also provide long-term technical support and spare parts supply.

Frequency converter, Siemens electrical components can achieve global joint protection, regular return visit mechanism: regular telephone or e-mail return visit to export equipment, through the return visit to understand the customer’s use of the equipment, and answer questions for customers in the process of equipment operation, synchronously upgrade some equipment operation opinions given by customers, and optimize the equipment.

The delivery time is approximately 60-90days from the receipt of the deposit to the equipment commissioning conditions, all the components and controls of our equipment are in line with CE standards, or CSA standards.

We will actively respond to any changes in the production environment, or changes required by customers, in the process of parts processing. The assembly link is carried out in strict accordance with enterprise norms and industry standards.

After the equipment assembly is completed, we will have a series of ex-factory inspection, after all links meet the factory requirements.

We will take the materials for a test drive. Simulate the customer’s on-site situation and try to ensure that every piece of equipment left the factory is qualified.

After the equipment arrives at the customer’s factory, we will send engineers to the site to install, turn on, and train the customer’s operators.

Our after-sales service is also in place, customers can have any questions in the production process, you can email, whatapp phone, etc., we will answer customers’ questions within 24 hours.


Ask For A Quick Quote

Ask For A Quick Quote

If you would like to have a question then get in touch today, we are ready to assist 24/7.
We welcome your cooperation and we will develop with you.

Here are some questions that our customers are very concerned about,
and we have answered them one by one.

We are a factory, professional in manufacturing and sales of high polymer extruders.

No.228, Qingchi Rd, Xinyue Street, Hushu Town, Jiangning District, Nanjing City, Jiangsu Province, China.

Usually 30~40days after receipt of the deposit.

T/T, L/C, Western union, Paypal.

Our warranty time is one year,but normally they will keep for a longer service time. Our machines’ main parts are made of high tool steel by special quenching treatment, with high corrosion resistance and wear resistance.

PE, ABS, PS, EVA, PET, PP, etc. Filled with CACO3, talc, TIO2, carbon black etc, TPR, TPV TPU thermoplastic elastomers; EVA and hot-melt adhesives;

Qualified products with competitive price.

Qualified spare parts and brand components, perfected pressing procedure and completed trial testing before shipping.

Nude packing or wooden box packing.

Front debugging, pre-job training and experienced engineer oversea installation service provided.

Training on buyer’s factory is provided.

Suitable machine will be supplied based on buyer’s requirements before order placed.

Experienced machanical designer customized-design provided.

Ask For A Quick Quote

If you would like to have a question then get in touch today, we are ready to assist 24/7.
We welcome your cooperation and we will develop with you.

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