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Language: English Russian Spanish
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Training Time: 23 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English, Russian, Spanish
Carrier ropes were introduced over a hundred years ago to address the safety hazards and time requirements associated with threading a paper machine by hand. While carrier ropes are much safer, many hazards still exist. To keep a carrier rope system operating safely and efficiently, it is important to understand the elements of proper design and operation. The information presented in this module will help you to identify existing issues with your carrier rope system and provide guidance on the possible changes needed to alleviate them.
At the end of this module, you will be able to:
The following key questions are answered in this module:
What is a "dog leg" in a carrier rope system?A "dog leg" release transfer refers to a rope transfer sheave setup that facilitates the dropping of loose tails and broke after a transfer point during threading. This improves threading and carrier rope life.
If a carrier rope needs to change direction on a sheave, how should the sheave be set up?The rope should enter the sheave square to the groove and exit on the required angle. The straight-on entry angle helps keep wads and broke from rolling the rope out of the sheave. The exit angle should be within the groove profile to minimize rope abrasion on the sheave edges.
What is the most common cause of premature rope failures?Poor sheave condition is the most common cause of premature rope failures. Secondary grooves worn in the root of the sheave will abrade the length of the rope, and especially hammer and wear the splice (which tends to be slightly bigger around than the rope) as it passes through.
Why is rope tension reduced after threading?Rope tension should be reduced after threading to allow the ropes to recover from the higher threading tension and help them maintain their natural elasticity. It also helps minimize rope wear by reducing the effects of abrasion.
Why are carrier ropes sometimes coated or treated?Size press and coater sections tend to use coated or treated rope to combat the effects of the chemicals present in these sections.
Below is a transcript of the video sample provided for this module:
Carrier Ropes - Procedures and Maintenance
View Course
Carrier Ropes - Safety
Paper Machine General Safety
Pulping and Papermaking Overview
Tail Threading
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