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Language: English French Polish Russian
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Dry End Equipment Series (Details)Includes 11 courses for $299/year. Paper Library (Details)Includes 95 courses for $1,499/year.
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Training Time: 15 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English, French, Polish, Russian
Every time a paper or board machine is started up after a shutdown, and following wet end sheet breaks, it is necessary to rethread the sheet from the forming section to the reel. After dry end sheet breaks, the sheet must be threaded through some portion of the machine. This module will describe the sheet threading process on a paper or board machine and the main components of a carrier rope system, including rope sheaves, rope tensioners, and rope drives.
Carrier Ropes - Design and Operation
View Course
Carrier Ropes - Procedures and Maintenance
Carrier Ropes - Safety
Paper Machine Winder Slitting
Web Guiding and Spreading
The following key questions are answered in this module:
How can ropes be used to thread a paper or board machine?Carrier rope systems are comprised of multiple sections, each containing 2 or 3 ropes which travel together along the sheet path. During threading, a ""tail"" (a narrow section of the sheet) is pinched and carried along between the ropes in each section.
How are carrier ropes driven?They can be driven by the driven rolls or dryer cans in their section, or by a separate rope drive in their return run.
Doesn't that take a lot of rope? What happens if you run out of rope?Carrier ropes consist of endless loops which travel along the sheet path with the tail through their section, and then separate and return to the beginning of the section. On their return run, they are tensioned and sometimes driven.
How is the tail transferred between rope sections?Each rope section can be set up to release the tail directly into an ingoing rope nip in the next rope section, or an auxiliary device (an air shower or belt conveyor) can be used to transfer the tail.
Why is rope tension reduced after threading?Reducing the rope tension after threading allows the ropes to recover and maintain their elasticity.
Below is a transcript of the video sample provided for this module:
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