machinery feature | 2016 – Downstream equipment
lines and can socket up to 1,200 pipes/hour. Multibell 75Q can socket pipes with output diameter ranging from 16 to 75mm and lengths of 1-6m plus socket. Pipes coming from each strand are moved to a buffer by a high-speed handling system to form a group of two, three or four pipes, depending on the diameter. The group of pipes is moved to a hot air-recirculation oven, which warms the length of pipe that is to be socketed -- with high precision, thanks to the double automatic aligning system integrated in the oven. When the heating stage is fi nished, the group of pipes is moved to the multi-forming station and socketed. Solvent cement cycle and air-blowing cycle are both
Sica says its Multibell 75Q receives PVC pipes coming from multiple- strand extrusion lines at different speeds
The company has also developed a linear sensor
technology that allows cost effective, synchronous multi-axis measurement of diameter and ovality during extrusion, says Zumbach, for products up to 200mm outside diameter. A two-coloured LED light allows simultaneous
scanning in each axis – and trouble-free measurement – even with product vibration. Integrated extraneous light fi lters banish measurement errors that were previ- ously unavoidable, while the use of different coloured lighting for each axis ensures high performance even for refl ective surfaces.
Multiple output Aside from dimensional measurement, there are other developments in downstream equipment of interest to pipe and profi le extruders – notably in belling and coiling. The Multibell 75Q, from Sica of Italy, is a fast,
automatic belling machine that is designed to receive PVC pipes coming from multiple-strand extrusion lines at different speeds. Multiple strand extrusion lines for plastic pipes are
growing, says the company – and the market is moving from double extrusion lines to quadruple extrusion lines. The new machine handles high production extrusion
Cutting it
The new Servo-Torq Plus extrusion cutter from Gillard is designed for plastics and rubber, as well as non-polymer materi- als. It combines Lenze brushless AC servo motors with a digital multi-axis control system to activate the rotating knife blade. Gillard says that high cut rates are possible, with precise cut length accu-
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racy. At the same time, Siemens wides- creen touch panels allow easy operator control of the machine. The new cutters are available with maximum diameter cutting capacities of up to 150mm. Integral twin-belt Accra-Feed
caterpillar infeeder/puller machines are provided to match every cutter model. These feature direct drive AC motors and
PIPE & PROFILE EXTRUSION | September 2016
planetary gearboxes. This improves speed control at high extrusion speeds, says the company. A high level of connectivity is standard.
Remote support is available via the internet, using the built-in VPN router, whicle Profi net communication allows networking with the rest of the extrusion line.
www.pipeandprofile.com
available, and sockets are cooled externally by pre- cooled compressed air and internally by cold water circulating through the mandrels. For producers who want to bundle the socketed pipes, an available bagging or strapping machine can be placed in-line, contributing to a complete process automation. Sica says that its four-strand has a number of advan-
tages over a two-strand line with the same output rate: Higher product quality: by extruding at a lower speed, the quality of the pipe is higher and constant during production; Short payback period: the four-strand line achieves high machine availability at the maximum pipe output rate possible, realising a shorter payback period; Small footprint: the line has almost the same footprint as a two-strand extrusion line, but with a higher achievable output rate; Low maintenance costs: a four-strand extrusion line needs less maintenance than a two-strand extrusion line thanks to the lower extrusion speed of each strand; and, User-friendliness: because a four-strand extrusion line has a lower speed than a two-strand line, it is easier to control.
Coiling back home FB Balzanelli, an Italian developer of pipe coiling machinery, says it has helped a hose producer to bring
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