Tandem Extruder | Cascade Extruder | Two Stage Extruder

The unique configuration of the Two-stage extruder machine is designed to combine the excellent mixing performance of the high-speed parallel Twin screw extruder with the advantages of the low-speed single-screw extruder’s low-temperature stability for a more efficient production process and better product output.

The Two-stage machine is characterized by its unique structural design. The first stage is the GTE high-speed parallel Twin screw extruder
, which uses the high dispersion and strong shear of the twin screw to complete the plasticization and dispersion quickly and fully. At the same time, because the screw is a building block structure, the screw combination can be adjusted arbitrarily according to different materials in order to achieve the best mixing state of the material. The second stage is GDE low-speed single-screw extusion machine, used for low-temperature extusion, due to the single-head deep groove structure of the single screw, which helps to stabilize the pressure of the melt in the extusion process, the single-screw barrel is equipped with heating and cooling, which can accurately control the extusion temperature and avoid excessive decomposition of the melt. Two-stage extusion machine combines the characteristics of high speed and strong mixing of twin screw and the characteristics of low speed, low temperature and weak shear of single screw, maximize the advantages of equipment and greatly improve production efficiency. The two machines are placed vertically to save space and provide continuous production line layout.

Granuwel Two Stage Extruder Machine For Sale

Main Features of Two Stage Compounding Extruder

Efficient mixing and homogenization

The first stage twin-screw design optimizes the mixing and dispersion of materials.

Fine Plasticizing and molding

The second stage single screw provides a smooth pressure and ultra-low shear force, suitable for fine plasticizing and molding of materials.

Production efficiency

The use of Two-stage machine reduces production interruptions and material waste, and improves production efficiency.

Flexible to adapt to different materials

Widely used in a variety of heat-sensitive material systems and large volume stripping operations, such as PVC, XLPE, halogen-free flame retardant cables, shielding materials, high-enrichment carbon black and rubber dehydration post-treatment operations.

Two Stage Extruder application fields

Suitable for a wide range of thermal sensitive and large volume off-swing operations

Soft PVC compounding and pelletizing for cable and wires

PE+ carbon black masterbatch

Low smoke zero halogen(LSZH) flame resistant cables

PE + Al(OH)3, Mg(OH)2 flame resistant agent

XLPE, PVC composite granulation

Low smoke halogen-free flame retardant cable material

PVC cable/pipe/hose material

Granulation of WPC Compounding

Shield material

Granulation of high-concentration carbon black masterbatch

Hydrogen peroxide crosslinking cable material

Rubber dehydration post-treatment operation, etc.

GTS Series Two Stage Extruder

Product characteristics:

1. Efficient mixing and homogenization: The first stage twin-screw design optimizes the mixing and dispersion of materials.
2. Fine Plasticizing and molding: The second stage single screw provides a smooth pressure and ultra-low shear force, suitable for fine plasticizing and molding of materials.
3. Production efficiency: The use of Two-stage machine reduces production interruptions and material waste, and improves production efficiency.
4. Flexible to adapt to different materials: widely used in a variety of heat-sensitive material systems and large volume stripping operations, such as PVC, XLPE, halogen-free flame retardant cables, shielding materials, high-enrichment carbon black and rubber dehydration post-treatment operations.

Application field:

Suitable for a wide range of thermal sensitive and large volume off-swing operations;
1. XLPE, PVC composite granulation
2. Low smoke halogen-free flame retardant cable material
3. PVC cable/pipe/hose material
4. Granulation of WPC Compounding
5. Shield material
6. Granulation of high-concentration carbon black masterbatch
7. Hydrogen peroxide crosslinking cable material
8. Rubber dehydration post-treatment operation, etc.

Structure:

Stage 1 is GTE high-speed co-rotating twin-screw extruder. Stage 2 is GDS low speed single screw extruder. Two machines are placed vertically.

Principle and applications:

◆ The synthetic twin-screw and single screw advantages combined with complementary. Twin screw extruder forced transfer, mixing and dispersing efficient plasticizing, no head die backpressure backflow.
◆ To avoid the high shear overheating; Single screw high pressure extrusion, but low shear at low speed, also avoid the overheating of contradictions.
◆ Twin screw and single screw combination, function decomposition, the process increases the independent variable, operation for each process step by step optimization; Higher efficiency and capacity.
◆ They are widely used in all kinds of heat sensitive material system and big volume to take off the swing homework, such as PVC,XLPE, halogen-free flame retardant cable, shielding material, highly enriched carbon black and rubber dehydration post-processing operation etc.

GTS Series Two Stage Extruder Specifications

Model		Screw diameter (mm)	Screw speed (rpm/min)	Motor power(Kw)	Output (Kg/h)
GTS-52/120	GTS-52	51.4	500	37/45	100-300
GTS-52/120	TS-120	120	85	30/37	100-300
GTS-65/150	GTS-65	62.4	500	55/75	200-500
GTS-65/150	TS-150	150	85	37/45	200-500
GTS-75/180	GTS-75	71	500	90/110	400-800
GTS-75/180	TS-180	180	85	45/55	400-800
GTS-95/200	GTS-95	93	400	200/250	700-1500
GTS-95/200	TS-200	200	85	55/75	700-1500

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.

Beyond Expectations: Client Testimonials

Soft PVC compounding and pelletizing line for medical pipes

We sincerely appreciate Granuwel’s exceptional support throughout our project. From the initial planning stage, their technical team meticulously analyzed our requirements and proposed multiple customized solutions for our two stage extruder. During production, they kept us updated with real-time progress reports. After delivery, their engineers arrived promptly to install, debug, and provide thorough training for our operators. Such professionalism is rare, and we look forward to a long-term partnership!

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