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Corotating Twin-Screw Extruders


Bandera corotating twin-screw extruders: the cutting-edge solution Bandera production range includes cutting-edge corotating twinscrew extruders (2C series) in standard configuration and/or for special applications (HVTSE series).


Bandera technology - the benefits

Bandera is synonym for excellence in manufacturing extruders (screws and barrels) with ancillary components, and in customer servicing The company Luigi Bandera manufactures an extremely wide range of extruders, as well as of screws and barrels intended for single extrusion lines (both single, and corotating or counterotating twin-screw) at its own production premises. The in-depth analysis of special and customertailored profiles has led to the ongoing improvement of production performance in the most different applications. Bandera provides special surface treatments of extrusion screws and barrels to prevent any erosion and corrosion issues. Bandera proven industrial expertise, combined with a 65-year heritage and cutting-edge technology, ensures top quality level products. Bandera has thoroughly invested in process servicing, creating a team of highly-qualified and skilled technicians. Bandera customers are constantly supported in problem solving as well as in line putting into service and final testing, in a mutual exchange of expertise and know-how. As a further support to after-sale service, Bandera Spare Part Dept outstands for efficiency in providing customers with the most suitable component parts, both at production and at maintenance stages. Bandera provides advanced and innovative turnkey solutions – from engineering, designing and manufacturing steps, from line assembly and putting into service to end up with to staff training. Bandera is also the most reliable partner in existing machinery revamping.

Direct “Compounding/Recycling” extrusion eliminates the need for pelletizing, thus leading to a one-step transforming process. The resulting benefits are definitely important in terms of power saving, minimized investments and simplified production. The “Compounding/ Recycling” method ensures cost effective process with minimized power costs, up to half the standard systems. Cost reduction is achieved through: no need for material and compound re-processing no shear and thermal stress normally associated with processes requiring a new melting/cooling stage cut of energy costs: no need for power consumption due to compound “re-” heating and cooling no limitation in extruder feeding. Up to 100% ground flakes without any reduction in line output due to the installation of force-feeding systems, low-density material recycling/compounding is made possible (e.g. ground and foamed film) in its patented HVTSE version, no need for raw and ground materials dehumidification, thanks to the top efficiency of high-vacuum venting systems installed. Similarly, no need for flakes crystallization (e.g.: PET PLA and PS flakes) before extrusion. Indeed, degradation is well kept within admitted limits


Reference applications and markets Bandera corotating twin-screw extruders intended for compounding/ recycling sector are also suitable for several high-tech applications in different sectors, some of which are listed here below. PET recycling - actually the major application field: direct extrusion foil for thermoforming intended for industrial and food packaging recycling and compounding of moist and contaminated process materials or printed PE/PP- or HIPS-based materials, requiring high-capacity venting food industry for cooking and mixing of vegetable process materials, such as flour and cereals synthetic fibre textile industry: PP, virgin PET, PET flakes for staple fibres, spunbond, and melt blown piping for building sector: multi-layer pipes from filler-added/ reinforced glass fibres materials, mineral filler for soundproofing finishing, low-cost standard pipes with mineral fillers automotive field: for thermoplastics and TPO/TPU composite foil and sheet direct extrusion/compounding

Bandera joins PTI to sell PET/PLA dryerless corotating twin-screw extruders in the Northern America region Since January 2010, Bandera has entered a strategic alliance with PTI (Aurora - Illinois) to supply the American market with dryerless sheet extrusion lines to process PET and polylactic acids (PLA) equipped with Bandera cutting-edge corotating twin-screw extruders. Although widely applied on the European markets, PET and PLA dryerless extrusion is relatively less known in Northern America. This is the reason why Bandera and PTI have entered a 10-year agreement focussed on the supply of equipment for complete sheet extrusion lines, to be based on Bandera HVTSE corotating twinscrew extruders. PTI is in charge of supplying the downstream section, the control system and the electrical components, to be distributed all over North America in compliance with US standards. PTI and Bandera mutually agreed to keep a complete extrusion line permanently on show in Aurora, Illinois. According to its agreement obligations, PTI is going to promote Bandera technology by incorporating it into its extrusion lines, and to provide for technical assistance and customer service.


Technical specifications Extruder design, manufacture, and assembly is 100% Bandera. Putting-into-service is fully managed by Bandera technicians. Bandera corotating twin-screw extruder production range involves 55mm, 70mm, 85mm, 105mm, 135mm, and 170mm diameter sizes in 18 L/D, 34 L/D, 42 L/D and HVTSE 52 L/D versions. Diathermic oil or air cooling systems are available. Output capacity is comprised between 300 and 3,500 kg/h, depending on the specific features of the process materials. The HTS-series modular gear reduction units are adaptable to any operating condition of any specific application. Extrusion screws consist of splined shafts with a number of conveying and mixing modular sections, made from tempered wear-resistant steel. Extrusion barrels, of the modular type as well, are offered in nitrided steel, or with interchangeable sections made from wear-resistant material.

Extruders

2C 55 HTS

2C 70 HTS

2C 85 HTS

2C 105 HTS

2C 135 HTS

2C 170 HTS

L/D

34

42

52

34

42

52

34

42

52

34

42

52

34

42

52

34

42

52

Screw diameter mm

57

57

57

70

70

70

85

85

85

105

105

105

135

135

135

170

170

170

Weight Kg

4.200 4.800 5.500 5.500 6.500 7.500 7.400 8.000 8.500 1.1000 12.000 14.000 17.500 19.000 22.000 22.000 25.000 30.000

A mm 5.500 6.000 6.500 6.100 6.700 7.300 7.200 7.900 8.600 8.000 8.900 9.800 10.900 12.050 13.200 13.300 14.650 16.000 B mm 1.550 1.550 1.550 1.700 1.700 1.700 1.800 1.800 1.800 1.950 1.950 1.950 2.250 2.250 2.250 2.250 2.250 2.250 Dimensions

C mm 1.050 1.050 1.200 1.050 1.050 1.200 1.400 1.400 1.400 1.400 1.400 1.400 1.400 1.400 1.400 1.400 1.400 1.400 D mm 1.250 1.250 1.400 1.250 1.250 1.400 1.700 1.700 1.700 1.700 1.700 1.700 1.800 1.800 1.800 1.900 1.900 1.900 E mm 2.100 2.550 3.100 2.500 3.100 3.700 3.400 4.100 4.800 4.200 5.100 6.000 5.400 6.500 7.600 5.600 6.900 8.200

Specifications provided for illustrative purpose only. Specifications subject to modifications without notice


New R&D and testing room department A new building housing R&D activities and wet tests on complete production lines will be finished in February 2015.

Manufacturing departments 3 production sites (covering a total area of 55,000 m2): • mechanical and electrical assembly area of extruders and complete lines including a new building under construction to be used for wet tests on the systems. • plant specializing in the production of screws, cylinders and flat extrusion heads. • area dedicated to testing of extrusion coating systems. Extensive use of CNC machine tools for the manufacture of screws and cylinders for extruders; extrusion heads for large-sized blown film may also be produced. All mechanical parts are designed and manufactured completely in-house. Furthermore much accessory equipment is designed by us.


Revamping of existing equipment and complete lines

Guarantee on demand over 24 months

“On-site” personalized training for new applications

Offers for effective spare parts packages

Fast and appropriate (mechanical/ electronic/processing) technical service

SERVICING PLANTS FOR EXTRAORDINARY MAINTENANCE

4 service centres covering the global market

TECHNICAL SERVICE

IS A SERIOUS MATTER After Sales Service Bandera relies upon its specialists to support its customers with an accurate After Sales Service, both at the line start-up and testing, and at the production stage. Cutting-edge technology is at Bandera customers’ disposal, at any time. In order to comply with its customers’ maintenance needs, Bandera has established a dedicated efficient Spare Parts Division. Pushing on its high tech solutions, Bandera offers its customers turnkey extrusion lines from engineering and design to construction, assistance and assembly stages. Besides, Bandera has drawn up specific training programs dedicated to customers’ personnel - the best way to understand how to operate new machineries and to retrofit existing ones.

Bandera has created a team of dedicated technicians for the installation and start-up of complete production lines and for training customers’ personnel. Responsive and efficient customer service is a fundamental part of any business with complete production lines located throughout the world. Bandera machinery is designed and manufactured to be exceptionally durable over time. This durability is optimized thanks to on-site customized maintenance programs. After Sales Service is guaranteed 24 hours a day via a specific communication network dedicated and coordinated between 5 service centers located throughout the world (Italy, Belgium, Brazil, USA, China).


briefinglab.com

PLASTICS MACHINERY EXTRUSION TECHNOLOGY SINCE 1947

Visit luigibandera.com to view Bandera’s complete production program

BLOWN FILM

FOILS SHEETS

EXTRUDERS FOR STEEL PIPE COATING

PVC PELLETIZING

Visit our website and learn about our pluses

luigibandera.com/products/extrusion-technology

Technical specifications provided for illustrative purpose only and subject to change without prior notice.

You can read and download this document from

issuu.com/extrusionintelligence/docs

REV3/2C/EN/06/14

Costruzioni Meccaniche Luigi Bandera SpA Corso Sempione, 120 - I-21052 Busto Arsizio (VA) Italy t +39 0331 398111 - f +39 0331 680206 lbandera@lbandera.com - luigibandera.com


Corotating Twin-Screw Extruders  

The cutting-edge solution Direct “Compounding/Recycling” extrusion eliminates the need for pelletizing, thus leading to a one-step transform...

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