Newsflash

Abstract

Beyond simply identifying   shrinkage   porosity   and filling   problems,   numerical  tools  have   been   further developed  to  predict  stresses,  microstructures,  defects and   to   model   specific   processes   that   can   be   used effectively   by   the   foundry   engineer   early   in   the manufacturing process to save significant time and cost. More specifically this paper will address the following topics:
•Stress and deformation - what is the final shape of
the cast component? What about fatigue life of the die?   Can   heat   transfer   variation   due   to   gap formation between the casting and the die be taken into account? Can hot tears defects be predicted?
•Micro  and  gas  porosity  -  what  about  the  integrity
of   the   part?   Can  porosity  be  compensated   by graphite   expansion?   What   about  the  initial  gas content in the liquid?
•As-cast mechanical properties-can local
mechanical  properties  be  predicted  such  as  yield strength and hardness?

 

 
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Home arrow Injection Molded Plastics arrow Suppliers arrow Asia's demand for recycled PE puts U.K. in short supply

Asia's demand for recycled PE puts U.K. in short supply PDF Print E-mail
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Thursday, 04 October 2007

GREENOCK, SCOTLAND (April 10, 2007) -- The export of huge amounts of British plastics packaging waste to Asia, particularly China, is leading to a growing shortage of polyethylene scrap available for recyclers in the United Kingdom.

Unlike other European Union countries, Britain allows exported plastic scrap as well as material reprocessed nationally, to count towards its quota under the EU’s Packaging Waste Directive legislation. As a result, U.K. recyclers are having a hard time competing for a share of the recycling stream.

They warn that the problem is leading to a serious reduction in Britain’s recycling capacity.

In January, British Polythene Industries plc, Europe’s top PE film producer and a leading waste recycler in Britain, closed plants in England and Scotland and stopped making some products that rely on recycled feedstock.

Greenock-based BPI cut almost 30 jobs with the closing of its Stockton on Tees, England, plant. That facility made plastic sacks using recycled content.

A BPI film recycling facility in Greenock employing about 20 closed in February.

“Our number of accredited recycling sites has been reduced from seven … [in 1998] to only three now,” pointed out BPI Chairman Cameron McLatchie in his annual review for 2006.

“This is distinctly unfavorable when compared with schemes operating in other countries within the [European Community], which have been devised to promote the recycling of scrap locally,” he said. Systems elsewhere have led to a “thriving” recycling sector in Europe.

McLatchie pointed out how the picture has changed in recent years. In 2001, United Kingdom recyclers handled around three quarters of Britain’s plastics waste. Last year, more than two thirds of the waste was exported to Asia, he said.

“The United Kingdom government would do well to re-examine the U.K. system and modify it to promote increased recycling of waste within the U.K.,” he said.

Meanwhile, BPI also has closed a film extrusion plant in Scunthorpe, England, with a loss of nearly 40 jobs. That plant made film for produce and deep-freeze packaging. Only last year, the plant added an advanced three-layer coextrusion line. At the time, BPI said the machine was essential to meet increasing demand.

Company officials declined comment.

 
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