Dual synchronized cutting for high extrusion speeds

An innovative method patented by Sica makes it possible to cut PP, HDPE and PVC-UP pipes performing two operating cycles simultaneously, on the same machine, thus reaching very high production rates. For example, the Duet125 automatic cut-off saw can reach hourly production rates of 2000 and 2300 pipes, of 150 mm and 500 mm in length, in both cases complete with sockets. Thanks to the machine's CNC control system, installed on the machine, the necessary cut length precision (tolerance of ± 1 mm) is always guaranteed.

This system allows for a perfect synchronization of the cutting unit with the pipe extrusion speed and consequent exact positioning of the unit at the required cutting dimension. Moreover, the machines are equipped with specific anti-wear tools to guarantee an exceptionally high and enduring processing quality.

The logical control system also offers ‘on the fly’ cutting capabilities, optimizing the use of the effective stroke to further increase output in terms of the number of cuts. Equipped with an intuitive icon-based graphic interface and a classic production system for preset sequences of lengths, the machine also features a new length sequences management system. Specifically, having entered the basic production parameters (extrusion speed, pipe diameter, capacity of downstream machines) the user can define the required production batches, automatically optimized by the system in order to exploit the machine's potential to the full. Intelligent planning of production sequences in addition to the availability of libraries in which process parameters and user product dimensions can be stored, determines the definition of a new state of the art field in terms of versatility and ease of control.

Finally, given the large number of cuts that can be performed per unit of time, the machine has been equipped with an extra-powerful cyclone-type dust exhausting system.

The range of automatic in-line planetary saws in the Duet series (available in the Duet 125, Duet 160 and Duet 200 versions) includes the Duet/K (cutting with knife without material removal for HDPE and PPR) and Duet/C (cutting with chamfering unit and knife without producing chips inside the pipe) versions, in addition to the standard model for PVC. Duet/C is particularly suitable for PP lines equipped also for the production of double-joint pipes.

The machines are entirely based on an electro-pneumatic design, eliminating all possible problems linked to the use of hydraulic actuators and hydraulic power packs, and are configured in order to optimize total energy consumption.