MACHINERY | EXTRUDER DEVELOPMENTS
machine then continues into the outer nylon layer extrusion group – comprising a second MXC 45-24D and an ECH 35/45 crosshead. The down- stream equipment includes more calibration, cooling and quality checks. “We have begun successfully producing the
product,” said Naresh Shudra, project manager for development and operation at Oriental. “With additional tooling for the TL-54 head, we can also produce single-layer nylon tube on the same line – for another application.”
Multi-layer concept KraussMaffei Berstorff has helped pipe manufac- turer Poloplast develop a special concept for making five-layer PP-R pipes with glass fibre reinforcement. The system was successfully commissioned at
Above: Davis-Stand- ard’s Thermatic 4.5in extruder is available for trials at its Pawcatuck technology development centre
facility is in a climate-controlled environment for running multiple resins including high temperature Peek and corrosive materials like FEP. The lab also incorporates Davis-Standard’s patented Alternate Polymer technology. Suzhou offers a high-speed FPVC extrusion system and multi-purpose microbore tubing line. The FPVC line runs at speeds of 5-100mpm for processing 2-8mm OD tubing with an accuracy of +/- 50 microns. Line components include a 63mm extruder, 8m water cooling, precision internal air supply, OD gauge and combination puller-cutter. The multi-purpose micro bore tubing line is designed for single or dual layer tubing, and single lumen tubing with or without a stripe. It is equipped with two extruders, OD/ID wall thickness measuring and controlling system, close loop control via vacuum sizing tank and puller, and a central control system.
Nylon tubing Oriental Electrical Components of India recently acquired a tandem extrusion line from Maillefer (which was recently acquired by Davis-Standard), to make nylon-reinforced tubing for vehicle air brakes. The new line, which incorporates a yarn braiding
machine, had to be capable of manufacturing product that would meet the SAE International Surface Vehicle Standard for nonmetallic air brake system tubing, said the company. Oriental contact- ed Maillefer in advance, to work a special configu- ration for the machine. The line begins with an MXC 45-24D extruder
and TL-54 head configured to process the inner nylon layer. In midstream, after calibration, cooling and quality control, the tube enters the braiding
28 PIPE & PROFILE EXTRUSION | July/August 2018
the Poloplast’s plant in Ebenhofen in Germany late last year. Poloplast has also received product approval and authorisation to produce the pipes – which are used for drinking water and air-condi- tioning systems – in the 32–250mm diameter range. While KraussMaffei Berstorff is experienced in multi- layer systems, the project developed for Poloplast relied on innovations in extruder and pipe head technology. “We overhauled the spiral distributor system design in order to meet the requirements for the individual layers and their thicknesses,” said Andreas Kessler, general sales manager for KraussMaffei Berstorff in Munich. The extruder/pipe head combination has been designed to save space. A KME 45-30 B/R main extruder – which features a KM-5L RKW 94-250 pipe head to make the PP-R intermediate layer – is surrounded by four co-extruders from the same series. These are arranged in a half-circle, in addition to a KME 20-25 B/R co-extruder for applying strips. This set-up allows the machine operator to control and monitor production from a central position. The main advantage of fibre-reinforced PP-R pipe is a low degree of elongation and bending. This gives them very high stiffness, which provides advantages when laying pipe. The pipes are very frequently installed so that they are exposed under suspended ceilings – especially in public buildings, says the company.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.battenfeld-cincinnati.com �
www.davis-standard.com �
www.maillefer.net �
www.kraussmaffeiberstorff.com
www.pipeandprofile.com
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