TECHNOLOGY | MACHINERY SHEET EXTRUSION DOWNSTREAM
Sheet improvement in Russia Release liners cut
Birusa, a Russian refrigerator manufacturer, has taken delivery of an automated system from KraussMaffei Berstorff to make coextruded polystyrene sheets. The company says that the highlight of the 1000mm sheet system is the ability to automate sheet thickness during production. “This system gives us enormous advantages, such as
high production flexibility, and reductions in changeover times, labour costs and the amount of waste produced,” said Maxim Komendantov, head of process engineering at Birusa. The company added that the system helped it to improve competitiveness under difficult market conditions. �
www.kraussmaffeiberstorff.com
THERMOFORMING
Pilot line adds thermoforming sheet at Battenfeld-Cincinnati
Battenfeld-Cincinnati has added a multi- functional thermoforming sheet line to its pilot plant in Bad Oeynhausen, Germany. “The new pilot plant line will enable our customers to develop new types of sheets or optimise their existing,” said Henning Stieglitz, CTO at the company. The core components of the pilot plant
line are the high-speed 75 T6.1 extruder, the StarExtruder 120-40, and Multi-Touch roll stack with a width of 1,400 mm. The complete extrusion line can produce sheets and thin boards made from new materials, recycled materials, bioplastics, and combi- nations of materials. The line comprises the two main
extruders and a 45 mm co-extruder, each with a multi-component dispensing unit, melt pump, and screen changer, feed block and roll stack with winder. Depending on the configuration, the line can achieve a maximum output level of 1,900 kg/h for PP or PS and around 1,200 kg/h for PET with line speeds of up to 120 m/min. The StarExtruder is ideal for producing
PET sheets from new or recycled materials. The single-screw extruder with central planetary roll section processes the melt very gently and achieves high degassing and decontamination rates thanks to the large melt surface in the central section. �
www.battenfeld-cincinnati.com
to length
US-based Azco has designed and manufactured a cut-to- length solution for a complex release liner application. The application
required the release liners to be unwound, fixed to the top and bottom of an extruded material, then cut to a determined length. The complete system includes dual unwinds, a knife assembly and a shingling conveyor. Dual cantilever design
brake unwinds feed out the release liners from two rolls. They are then joined to the top and bottom of the extruded material. The material travels through a set of nip rollers, which compress and stick the liners to the extrusion. A dancer controls the speed of the nip rollers and prevents the material from wandering.
An internal guide
directs the material from the drive rollers into the knife assembly where it is cut to a defined length. The cut samples drop onto a conveyor which indexes forward, shingling the material. The modular designed knife assembly is pneumatically operated, requiring 40-60psi of air pressure. The unit is PLC controlled. All components are mounted onto an aluminium top plate. �
www.azcocorp.com
52 FILM & SHEET EXTRUSION | July/August 2019
www.filmandsheet.com
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