Product category:
Weighing systems, Strain gauges
News Release from: Avery Weigh-Tronix | Subject: Marley Eternit
Edited by the Processingtalk Editorial
Team on 05 August 2008
Batch weighing system for tile coating
mixture
A new batch weighing system from Avery Weigh-Tronix has eliminated downtime, simplified production and reduced the man hours needed for the production of coatings for clay tiles at Marley Eternit
The new system consists of a programmable indicator, software and two existing load cell systems It controls pumps, which dispense precise amounts of sand, pigment and binding agents from storage hoppers
This article was originally published on Processingtalk on 4 Aug 2008 at 8.00am (UK)
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This is mixed to produce a coloured coating for the clay tiles from Marley Eternit, one of the UK's leading roof tile manufacturers.
Previously the company used a programmable logic controller to control the process.
Using this system an operator had to reset a recipe for each batch.
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Also it would not indicate whether pigment, sand or the binding agent was running low in a hopper.
This could result in an inaccurate recipe, which would then need adjusting by hand.
Says Lee Kempson, Planning Engineer for Marley Eternit: Using our old system we would have a significant downtime period about once a month.
To date we have had no inaccurate batches or errors with the new system and therefore no downtime.
The L788 programmable indicator stores all 18 recipes for Marley Eternit tiles.
A supervisor can edit the recipes or add more via a password-operated screen.
Up to 50 can be stored in total.
To use the system, an operator selects the required recipe and the number of batches needed using the touch screen.
They can then add more recipes and batches before starting the process.
If the pigment feed runs out the system will stop and the operator has the option of entering 'ratio', which scales the sand and silicon binder to suit the quantity of pigment, and thus maintain the recipe formulation.
Once the target weight for a batch is reached, the system checks that the mixer time has expired and that the mixer conditions are met.
If a second pigment is needed it is then added and mixed.
When the batch is complete, the system prints a report and the programme loops onto the next batch or resets to the main screen if it has finished the last batch.
Continues Kempson: "Using the Avery Weigh-Tronix system we have found that we can redeploy the operator onto other tasks.
This has made the whole process more efficient and cost effective".
The system is included in the Marley Eternit service contract with Avery Weigh-Tronix.
This covers regular servicing and calibration for all of the company's weighing equipment and systems for processing, plus its on-site laboratory scales.
Marley Eternit came out of the merger of Marley Roofing and Eternit building products and is now part of the Etex Group.
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