EuroWire January 2007

technology news

Huawei and Global Marine partnership

Huawei Technologies Ltd, China, a provider of next generation telecommunications network solutions, and Global Marine Systems Ltd, UK, an independent subsea cable installation and maintenance company, have announced a partnership to jointly develop a new generation of end- to-end submarine networking solutions. The combination of Huawei’s optical solutions and Global Marine’s subsea repeaters and submarine engineering will give submarine network developers and operators an alternative to the high cost of building out submarine networks. and compatibility of Huawei’s Ultra Long Haul optical solutions, high quality of the products, powerful R&D resources and core technologies, quick response to customer’s requirements, successful deployments and developments “We the are highly impressed with excellent performance Buss AG, Switzerland, has launched a new version of its Quantec® high performance kneader for use in the compounding of high grade PVC pellets for extrusion and injection moulding. The new machine has been optimised for direct feeding to PVC film calenders. Throughput is adjustable in a range of 1 to 3, with improved process stability, and the machine is more compact, saving space and investment cost. A newly developed intermittent cutting device ensures non-adhering PVC pieces of uniform size, and the shut- down time required for opening, cleaning and closing is reduced to between 30 and 50 minutes. Melt quality meets high demands for homogeneity without pinholing, for

worldwide,” said Mr Gabriel Ruhan, Global Marine’s chief executive. Mr Jeffery Gao, Huawei’s senior vice president of optical networks, said: “Working with Global Marine, who has over a century’s worth of experience in the installation and maintenance of subsea telecommunications with new generation of repeaters, will allow us to expand the capabilities of our networking equipment, and simplify the total ongoing network management costs borne by our customers.” Global Marine Systems Limited – UK Fax : +44 1245 702210 Email : info@globalmarinesystems.com Website : www.globalmarinesystems.com Huawei Technologies Co Ltd – China Fax : +86 755 2153 4356 simpler, and the residence time under thermal and mechanical loading is shorter than with two stage processing. As a result, the sensitive PVC melt is less liable to burn, so process stabiliser consumption can be reduced. At the end of the processing section the finished PVC melt is extruded through one or more large cross- section nozzles. It is then divided by a cutter with an innovative control system: the intermittent cutter knife timing is synchronised with the screw motion. As a result, the knives cut at the beginning or end Email : support@huawei.com Website : www.huawei.com

New version of kneader for calender feeding

of each cycle when practically no material is being transported. This ensures a smooth cut, and PVC pieces of uniform size. After cutting, the pieces fall onto a conveyor belt which takes them to the calender roll nip, with enough space between them to

colour uniformity, and for degassing, all of which are essential requirements for high quality PVC film calendering.

The quantec version for calender feeding is a single-stage machine, ie it has no

The quantec kneader for calender feeding

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additional discharge screw. Instead, the length L of the mixing and kneading part, normally in the ratio 10 to 11 L/D (where D=screw diameter), is extended by 4 to 5 L/D. The additional space serves for degassing the melt and building up the necessary discharge pressure with minimal energy input. This single stage design offers quality and cost advantages: processing is

prevent sticking together. Individual pieces make for better and more uniform filling of the calender roll nip, which improves PVC film quality.

Buss AG – Switzerland Fax : +41 61 825 68 58 Email : info@busscorp.com Website : www.busscorp.com

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EuroWire – January 2007