Cincinnati extrusion halved the area of cooling

Austrian manufacturer of extrusion machines gave the event of a theoretical and practical component. If in the morning the center of attention were the conferences, in the afternoon the participants could see all these solutions with their own eyes in the factory of Cincinnati, where they performed six lines for pipe in production. The programme was completed with the exposure in small stands of 25 partners, among whom was the Spanish company Molecor.

For the first time, Cincinnati Extrusion showed an audience specialized KryoSys completely new system for the manufacture of tubes of polyolefins. It allows reduce the cooling zone in more than 50 per cent, or double the production while maintaining the existing cooling zone. The visitors observed that it is possible to a performance of more than 1,000 kilograms per hour in the manufacture of a tube 400 SDR 11, PE 100 of Sabic. KryoSys is a combination of the new head with distributor of Iris spiral mandrel 40KryoS with cooling of the mass and a special cooling of inside the tube. The system was presented in combination with a high-speed Rapidex extruder.

The great advantage of this head is located in the new system for the cooling of the body cast within the row. This system allows to refrigerate the dough cast in own head, so that you can significantly reduce the length of the cooling of the line area. The lowest temperature of the molten mass consequence is a higher viscosity at the start of the row, with which it also acts against the effect of sagging, especially when it comes to tube with thick walls.

In other two lines, Cincinnati was the manufacture of PEX-a hot water pipe and tubes for heating to distance and quick change of dimension in the manufacture of tubes of polyolefins. Both lines had also been developed in cooperation with partners.

The line for pipes developed with LK-Pex, for greater performance in the production of PEX-a pipe that one with piston extruder, achieved a performance of up 120 kg/hour making a 63 mm tube, using a conical double screw Konos 63 with special head extruder. Processing material was a type of PEX Borealis, to be reticuló of form peroxídica with the help of a horizontal furnace of infrared.

A million miles of pipe per year

"Over the next forty years are installed annually a million kilometres of pipe". So felt it in his Conference opening the Kroiss Professor, of the Institut für Wassergüte at the Technical University of Vienna. This estimate also agreed the rest of the presentations. The tubes will continue to need around the world, mainly for networks of supply and drainage of waters, but also for the conduct of gas and as protection tubes, because it is reasonable to have recourse to them both from an ecological and economic point of view. Current trends suggest that even more different kinds of large and small diameter tubes will be needed in the future. This need requires logically new investments and therefore that the future prospects are positive. The demands which will be subject machines manufacturers, said the speakers are a greater degree of automation, greater flexibility and a wider range.

Another very eye-catching attraction for attendees were two different forms that were submitted for manufacturing pipe composed of five layers aluminio-plástico. Compounds of aluminium tubes are mainly used for radial heating (under floor) for its advantages, because, due to the aluminium layer, are easy to install, which is compounded by the absence of inlays and corrosion provided by the plastic.

One of these two complete lines has been developed in collaboration with Nexans. Includes a total of four extrusion machines, two Talos 60-30 G with optimized spindle for PEX and two coextrusoras, and is designed for high performance applications. In the manufacture of pipe of Solvay Pedanaplast PEX-b 16 mm with wall thickness 2 mm, it attained a speed of 40 m/min. In this case the butt TIG welding technique was used.

Unlike this, the other presented line is ideal for newcomers to this sector who want to participate in the growing market of tubes made of aluminium. This line designed with Maintools is secure, easy to operate, relatively short and resorted to the method of ultrasonic welding by overlap for the aluminum layer. With the same dimension of tube and two extruders single Talos 45-30 G for the internal and external layer PE-RT of Dow Chemical, as well as two coextrusoras for the intermediate layers of adhesive, he achieved a yield of 25 meters per minute.

Also in collaboration with Maintools, the manufacturer of extrusion machines showed an economical solution for the manufacture of irrigation in a twin-track process. The produced band for irrigation, which took place in a line with an output of 60 kg per hour and a speed of 40 meters per minute, had a "flattened" channel, which just poured plant 250 milliliters of water for every metre, every ten minutes. It used an extruder Talos 60 - 30 G and the material was a PP of Sabic.

Finally, it also highlighted the quick-change system of dimensions achievable during the process of extrusion of the tube. System IntelliChange, developed with the Inoex Enterprise components, offers processors an economical solution, allowing a rapid response to the demands of the client, thus reducing costs and storage needs.

She performed with the manufacture of a tube of two layers of PE, with change of 63 and 160 mm in diameter. For the plasticizing of PE 100 of Borealis was used a Talos 75 - 30 G. In combination with the coextrusora Alpha 45 - 30 G reached a production capacity of 300 kg per hour.