Channel: Refractories
PSR: Cord Dispersal System, a continued stirring success

2015-11-06 | Refractories

The company in this article – Parkinson-Spencer Refractories – has been charting the development and sales of its Cord Dispersal System over ten years and, in 2010, reported “unprecedented interest in its CDS system”. That trend has continued and significantly accelerated with the total number of systems supplied and on order passing 90 by July 2013, with more than 40 supplied in the last three years. This article discusses some of the design issues, experiences and results to date.

Parkinson-Spencer Refractories (PSR) first introduced its concept of the Cord Dispersal Stirrer System in 2002
It was as long ago as 2002 that Parkinson-Spencer Refractories (PSR) first introduced its concept of the Cord Dispersal Stirrer System. This initially came about as a result of advising customers on the use of its refractory stirrers for the elimination of “cat scratch” cord with the eventual realization that there was a need and opportunity for the supply of a complete package solution. Although the use of stirrers in the forehearth equalizing section was not a new idea, their use as a means of dispersing “cat scratch” cord had not been successfully exploited to any great extent up to that time. In fact many suppliers and glass companies concluded that the use of stirrers was not a suitable solution to the “cat scratch” cord problem, believing that the stirrers could not be operated close enough to the channel base to affect the cord and that if they were there would be problems with stirrer breakage and excessive stirrer and channel block wear. The installation of a drain system was therefore fast becoming the fashionable way of approaching this problem. It was apparent to PSR, however, that draining was not a universally successful solution and that there was a significant on-going operational cost in the wastage of glass that flowed out through the drain even if this contaminated glass was returned in the cullet.
Over the first few years of supplying its stirrer system, the company fine-tuned both the stirrer location and the stirrer configuration and soon real...

Article taken from Glass Machinery Plants & Accessories bi-monthly magazine (6 issues per year)
Year: 2013 number: 5
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