MACHINERY | DOWNSTREAM EQUIPMENT
Right: Sica’s TRS W series of in line plan- etary saws perform cutting and chamfering without producing dust or chips
W series of in line planetary saws is available – de- pending on pipe diameter – in the 160W, 250W, 400W and 500W versions. The company has been granted a European
patent on the architecture – and cutting and chamfering method – of the machine. Typical problems encountered when cutting and chamfering include: having to install a collection system – and a filter – to deal with the dust; replac- ing or resharpening the cutting/chamfer tools; shielding internal machine parts from dust and chips; and needing a monitoring system to check suction efficiency. Sica says that its W-type cutters are free of these
Below: Gillard’s Braid-Cut HD cuts cleanly through stainless steel-braided PTFE and rubber hose
problems: the pipe cut is performed by a simple separation, and the chamfer by hot plastic defor- mation of the material. This delivers a number of advantages, it says, including: an absence of waste material from the cutting/chamfering process – re- sulting in considerable raw material savings; no contaminating dust or chips, which preserves a high degree of cleanliness; less need for mainte- nance; the use of a universal chamfering tool, which cuts operating costs; and lower noise levels, as there are no fans or milling tools. All models include electrical synchronisation and double belt movement for high dynamics, and are equipped with cutting ‘on the fly’ and CNC to ensures a precision of ±1mm for cut pipe length. This system allows lose synchronisation of the cutting/chamfering unit with the pipe speed and its consequent accurate positioning at the exact point to be cut/chamfered. The chance to make cuts on the fly (the subject of another Sica patent) optimis- es the useful stroke provided to the cutting unit, increasing its potential in terms of cuts/chamfers performed, says the company. Sica has also patented a method for cutting plastic pipes at very high production rates. The
machines are designed to cut and chamfer PP, HDPE and PVC pipes, performing simultaneous double cutting cycles automatically. For example, the Duet 125 automatic cut-off saw
can reach hourly production rates of around 2,000 pipes of 150mm in length plus sockets, and more than 2,300 pipes/hour of 500mm length plus sockets. The system also guarantees the necessary cut length precision (tolerance of ±1mm) thanks to the its CNC control system. Machines are equipped with anti-wear tools to guarantee high quality of the cutting/chamfering process. The logical control system also offers ‘on the fly’
cutting, optimising the use of the effective stroke to further increase output in terms of the number of cuts per hour. Equipped with an intuitive icon- based graphic interface and a classic production system for pre-set sequences of lengths, the machine also features a new length sequences management system. After entering the basic production parameters (extrusion speed, pipe diameter, capacity of downstream machines) the user can define the required production batches.
Braid cutting UK-based Gillard has developed Braid-Cut HD – a circular blade cutter to cut cleanly through stainless steel-braided PTFE and rubber hose. There are two models in the series, which is a
heavy-duty version of the standard Braid-Cut MT. The two models are designed for larger outer diameter hoses of either 40mm or 50mm OD. Both include an integral Accra-Fedd UA belt infeeder. The machine cuts through stainless braided hose
cleanly using an integral welding head to fuse the wire ends together. Elkonite tungsten copper alloy electrode jaws clamp the hose while the toothless
30 PIPE & PROFILE EXTRUSION | September 2018
www.pipeandprofile.com
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