Making paper safely
A
Castell Safety International product story
Edited by the Engineeringtalk editorial team
Nov 17, 2003
Iggesund Paperboard, the UK's largest manufacturer of folding boxboard, is using safety interlocking systems from Castell to ensure risk-free routine access to machinery at its Cumbria-based mill.
Iggesund Paperboard, the country's largest manufacturer of folding boxboard, is using safety interlocking systems from Castell to ensure risk-free routine access to machinery at its Cumbria-based mill.
The implementation of the HSE initiative, "Making paper safely", has seen Iggesund introduce many new safety procedures.
Castell has supplied the company with several KSS20 solenoid-controlled interlock switches, plus key exchange boxes and 96 access locks with corresponding colour-coded and numbered keys.
These have been installed on the gates of the two board machine dryers and safeguard production operators and engineers who require entry into this hazardous area.
Iggesund has several generations of Castell products on site.
Alan Brown, the company's Projects Department Manager, confirms: "The mill has used Castell key systems for many years and our experience is that they are reliable and robust products".
Castell's products provide protection by ensuring that the dryers have completely stopped before keys are released that allow access gates to be unlocked.
When a dryer is turned off the solenoid energises, allowing the trapped key to be removed from the KSS20.
This puts the machine into jog mode, permitting only controlled movement, and, until the key is returned, the dryer cannot enter any other mode.
The initial key then releases colour-coded keys from the key exchange box that allow access through the gates.
It cannot be removed from the key exchange box and reinserted into the KSS20 until all the access keys have been returned to the key exchange unit.
The installation of the Castell products was as cost-effective as installing tongue switches, and provides greater reliability in this harsh environment where temperatures regularly top 60C.
The interlocks are mechanical so, although the unit cost is initially higher, installation does not require extensive electrical wiring and is therefore less complicated.
This mechanical feature also means that the interlocks are more durable and dependable than tongue switches under heavy-duty use.
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