Page 50 - Plastics News June 2023

duced by spunbond or melt blown of machines are used to ultrasoni- Calendering multi-layers with con-
processing, converting the basic poly- cally weld and seal the longitudinal tinuously running ultrasonic heads is
mers into a textile fibrous material of o fi mem- another common application where
differing densities or pore size. Spe- brane material to form cored circular laminates can be run at speed contin-
c sing u medic micro fi section filter elements. Depending uously to create laminated multi-layer
often involve single or multi layer upon the specific filter type, this can filter media ready for downstream fil-
membrane type materials where pore involve working with a range of pleat ter cartridge / element production.
size and the filter material thickness depths, typically up to and including For filter or membrane cutting appli-
are extremely small with membrane 50 an fi leng fro 250 cations, whether flat scrim types or
thicknesses 5 micron or less. These to 1500mm. Combined with these three dimensional formed materials,
different materials are then processed variants, are the number of pleats the ultrasonic cutting process offers
into a range of filter formats and de- to fi elemen diam- the ability to cut product at higher
signs. Some of these are pleated and eter. Machin configuration can speeds compared to conventional
others are of a flat scrim membrane be simple single item manual load or cutting knives, without deforming
type or even combinations of the two semi automatic with multiple index- or tearing the product, whilst at the
depending upon the individual appli- ing of the ultrasonic head over the same time providing a sealed non
cation. media or movement of media under fraying edge.
a static head. The ultrasonic systems
It’s at these processing stages where o configuration upon With the ability to select from the
ultrasonic technology has become the traditional linear ultrasonic process
process of choice for cutting, seal- Telsonic’s USP3000E Press complete
ing, calendering and the joining of with a 20kHz MAG 3.6kW or 4.8kW or Telsonic’s unique torsional system,
SoniqTwist for delicate small medical
fi materials. Ultrasonic technol- generator. fi membranes, technolog
ogy today provides a state-of-the-art A touchscreen interface allows the capable of performing not only weld-
approach to the production of most weld parameters to be changed from ing operations but also material cut-
fi products, an man time to energy, maximum power, and ting and cut’n’seal operations across a
examples of the process being inte- via a linear encoder, weld by distance wide range of material types.
grated as the central process within or absolute distance, plus welding
machines that are capable of manufac- with both amplitude and pressure In a world where businesses must also
turing a comprehensive range of filter profiling proportion valve. consider the impact that their manu-
component sizes. HMI interface allows weld recipe in- facturing processes have on the envi-
put, recipe storage and set up with ronment, ultrasonic technology is a
The nature of the ultrasonic process natural choice as a fast, clean process,
mak po to impro efficien- visual displays and the capability to supporting recyclability, requiring no
cy, quality and operator ergonom- output all weld evaluation data. The joint interface consumables, and pro-
ics, whilst providing the opportunity weld recipe facilities are fully elec- viding the added benefits of measur-
to acquire valuable process data. In tronic and include data selection in able and traceable process data.
fi welding, the collaboration with the machine main
PLC / HMI control system.

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50 PLASTICS NEWS June 2023