MACHINERY | TECHNOLOGY INSPECTION Fast detection of pipe defects


Sikora’s diameter gauge heads – in the Laser 2000 and 6000 series – can be used to measure surface defects on cooled tube or pipe


Measuring pipe dimensions after the vacuum tank is an estab- lished part of inline control. However, assessing defects at the end of the extrusion line can help pipe manu- facturers to avoid customer complaints. A gauge head can be installed at the end of the line – beside existing wall thickness measurement


TOOLING Crosshead made for corrugation


Maillefer has developed a new crosshead for corru- gation. The ECH 3/20 single


layer extrusion crosshead is designed for production of single-layer corrugated tubes, especially for


PROFILE EXTRUSION Saving space in window extrusion


Polish profile manufacturer Decco has saved space in its production facility by using a number of ‘piggyback’ extruders from Battenfeld-Cincinnati. Decco originally installed two of the company’s co-extrusion lines in 2019, and has placed repeat orders for several more. The piggyback models consist of main extruders and co- extruders, and have extended Decco’s production capacity to 20 lines. “The high-performance level of the extruders and their mature process


www.pipeandprofile.com


technology support the production of high-grade, durable profiles,” said Piotr Domaszewski, managing director of Decco. Co-extruders enable the production


of multi-coloured designs and the use of recycled material in the middle layer. Decco uses its own production scraps as well as bought-in PVC regrind. In all the co-extrusion solutions


recently delivered to Decco, a TwinEx 78-34 with an output of up to 290 kg/h is the main extruder, combined with a


ConEx NG 65 as co-extruder. The conical twin screw extruder, with up to 250 kg/h output, is mounted on top of the parallel extruder, so that floor space is required only for the latter. As well as saving space, the piggyback configura- tion offers cost advantages through a common control cabinet, easy opera- tion and high energy efficiency. The integration of tooling is simple and variable thanks to the flexible frame structure of the co-extruder. � www.battenfeld-cincinnati.com


May/June 2022 | PIPE & PROFILE EXTRUSION 43


automotive and technical applications. The maximum die diameter is 20mm. The head helps to ensure


long production runs with high resistance to abrasion. It includes an air injection system. The extrusion head


is mounted directly on a stand for user-friendly handling during cleaning or tool changes. Its assembly allows for compensation with the extruder due to thermal expansion. � www.maillefer.net


devices, for instance – where the pipe is already crystal- lised. The diameter values of the cold measurement provide information about the shrinkage behaviour of the pipe. It also provides an extra ovality measurement. Depending on customer


needs, Sikora devices can measure between two and 12 measuring axes. The company has developed a tool for this, which calcu- lates how many measuring axes are needed for 100 % surface detection. � www.sikora.net


RECYCLING


Pulveriser ups profile


throughput A North American extruder of PVC window profiles has installed a PKM800 pulverising system from Pallmann Industries in order to expand manufacturing capacity. The pulveriser has helped to raise through- put and productivity, reduce material cost and increased the cleanliness of products. The pulveriser converts


PVC scrap and delivers 2000 lbs/hr of recycled PVC at 20 mesh (840 micron) particle size. These recycled powders are mixed with virgin PVC material and re-entered into the profile extrusion process. The PKM800 has twice the output of the previous competitive model, according to the company. � www.pallmannindustries.com


IMAGE: SIKORA


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