Extrusion International 5-2018

62 Extrusion International 5/2018 PIPES AND PROFILES PERIPHERY The first case study has as its object the already known S.R.M. 400/1200, the patented rotary pipe-to-coupling welding machine for corrugated pipes. Based on specific customer requests, a European group leader in the production and marketing of double-wall corrugated pipes, the machine has undergone an upgrade that has allowed it to increase and make it more productive. The new model has been added to the range of rotary welders produced so far. It can process PE and PP pipes with a diameter from 200 to 1400 mm, with a standard length of 3, 6 or 12 m. The welding process is obtained by adding some material be- tween the PE or PP socket to the corrugated pipe of the same material. The head unit, controlled by an electronically controlled mo- tor, advances automatically reaching the welding position, by blocking the pipe against the socket. The pipe and the coupling rotate to execute the welding op- erations, controlled by a PLC and an operative keyboard with processing recipes for the different types of pipes. Once the welding operation ends, the welding head comes back to the initial position, the mandrel unblocks the pipe and the cou- pling, so the head comes back in position for a new coupling loading. During this process there is no loss of speed on the extrusion line, aswell as noproductionwaste andnoproblems of ovality. The new concept of cutting device, designed ad hoc to solve a specific production need of an important company operating in the extrusion of coextruded plastic profiles of pipes, takes the technical name of TVP/60 or rapid planetary cutting unit for rapid cutting of PE, PP and PVC pipes with a diameter from 5 to 60mm. The carriage, managed by a brushless motor, synchronizes with the extrusion speed at the cutting signal, and the blade rotates around the tube cutting it, without any removal of ma- terial. The rotational speed of the rotor unit is controlled by a brush- less motors for the optimization of the number of revolutions, speed of penetration of the blade into the tube and therefore of the cutting speed. The cutting system of the TVP / 60 is absolutely innovative thanks to the implementation of a brushless motors system that allows to reach the best precision, reliability and flexibil- ity, as well as tight tolerances on short cutting lengths. The ad- vanced electronics of this newmachine, versatile and compact, controls cycle times, in order to optimize the production pro- cess as much as possible. In addition to the features described above, the machine is also characterized by silent process and energy savings. Thanks to the differents requests and needs of themarket, Baruffaldi Plastic Technology develops customized projects and technologies in step with the times, suitable to meet even the most particular production needs of its custom- ers withmodular and highly reliable solutions. Primac once again hits the mark Baruffaldi Plastic Technology s.r.l. Via Walter Tobagi, 13, 48032 Fusignano RA, Italy www.baruffaldi.eu Primac Planetary-cutting-unit Baruffaldi S.R.M. Primac, brand of the Dosi group and sister company of Baruffaldi Plastic Technology, proud of its 60 years of experience in the field of manufacturing of machines for processing smooth and corrugated pipes in PP, PE and PVC, reached another important goal in the last year. The R&D activity has improved and enhanced the productivity and quality of the process of two of its best sellers.