MACHINERY | DOWNSTREAM EQUIPMENT
circular blade makes the cut. The PTFE or rubber inner hose is left with a perfect cut finish, says Gillard. There is no wire flare to worry about – nor are there loose ends. Ferrules or clamping caps can be pushed onto the cut ends, with no snagging. The machine is fully PLC controlled, with an advance program to ensure total synchronisation between the welding and cutting. Motorised pay-off systems are available, to ensure efficient off-line cutting from coils. Gillard can also integrate ink-jet printers for marking the cut pieces.
Micro cutting A medical travelling planetary cutter (M-TPC) from Conair features a fully-programmable, servo-driven cutting head that cuts small-diameter medical plastic tubing so precisely that the need for secondary, off-line tube finishing is virtually eliminated, says the company. In the M-TPC cutter – the latest in the MedLine
Below: Conair’s M-TPC cuts small- diameter
medical plastic tubing so precisely that secondary, off-line
finishing is almost eliminated
family of cleanroom-ready, downstream extrusion equipment for medical applications – a planetary knife spins around the circumference of tubing from 0.080 to 1in in outside diameter (2.03 to 25.4mm OD), cutting it without deformation, particulates, burning or fracturing. Unlike other cutters that remove tube material and can leave particulates behind, the M-TPC planetary cutter splits the tubing apart cleanly through displacement, without loss of any material. This cutting method never blocks continuous airflow through the centre of the tube, so tube sizing and ovality are not affected as they can be when flying-knife cutters are used. The programmable, servo-driven cutting head enables complete and precise control of cutter speed (surface speed), rate of cutter penetration (feed speed), and final depth of the cut. The planetary cutter is mounted on a precision,
servo-driven traveling table that can handle tubing automatically at line speeds of up to 100 ft/minute (30.5 m/minute). The cutter’s standard servo controls enable it to make distortion-free and particulate-free cuts at rates up to 45 per minute while holding cut-to-length tolerances of ±0.031in (±0.787mm), even on shorter lengths of tubing. The cutter can be used with the full range of
medical plastic tubing, including difficult-to-cut materials such as styrene, PET, HIPS, and PC.
32 PIPE & PROFILE EXTRUSION | September 2018
Punching performance IDE of Germany has developed a combined punching and milling unit for inline pre-fabrication of profiles. The unit, based on the company’s ME 41/6.1
model, is integrated into an existing extrusion line in order to perform position-specific punching and lateral sectioning of profiles. “This is to avoid prefabrication work outside of
the extrusion line,” said the company. The arrangement has two fixed milling units. The punching unit stamps the desired punch pattern, taking into account the distance to the profile edge. The milling units process the profile laterally. The punching/milling pattern is programmed via the machine controller ME Control 20/2. For punching – which is applied pneumatically
– the force is 3000N, the punching stroke is 10mm and the carriage travel is 25mm. The punching sequence is up to 100 cycles/minute. The milling unit features cutters with a suppres- sion element, and manually adjustable stops to control milling depth. The company has also demonstrated a punch- ing unit to prefabricate both sides of floor panel profiles up to a width of 591mm. It uses a special punch with two mutually adjustable longitudinal and transverse punching heads using an ME 4 unit. Here, the carriage travel was 250mm, punching
force was 2 x 24,000N at 6 bar, and profile speed was 1m/min.
At the same time, Italy’s Baruffaldi recently held an open house in June at its factory in Fusignano, where it demonstrated a number of downstream processing machines – including two complete systems for punching and coining electric chan- nels. One destined for Iran, the other for Russia. The blanking and coining of the electric cable ducts is carried out on three out-of-line sides, which, thanks to its modularity, is suitable for punching all the formats in dimensions from 15 x 15cm up to 100 x 150cm. The coining is based on a technology developed specifically by Baruffaldi, which elimi- nates burrs and sharp edges along the slots. The company says that its Povi 10000 punching systems are among a small number that can run at up to 12m/min without affecting product quality.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.bostonmatthews.co.uk �
www.sica-italy.com �
www.gillardcutting.com �
www.conairgroup.com �
www.ide-extrusion.de �
www.baruffaldi.eu
www.pipeandprofile.com
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