Search results

Follow these guidelines for periodic maintenance of roll doctors

Always refer to the roll doctor OEM supplier's manual for maintenance information. However, the following are guidelines for periodic maintenance and lubrication for typical roll doctors assemblies.

Coater pivot frame hysteresis analysis can solve binding problems

Most blade coater beams are fastened to pivot frames which move the head into position when the coater is loaded. In the case of rigid support profile bar coaters, if the pivot frame binds, coat weight control suffers. A hysteresis test may be needed.

Air guide maintenance guarantees trouble-free even operation

The air guide is common on paper machines, where the machine clothing is a continuous belt. Proper care and maintenance of the air guide is essential to make sure that the guide works evenly and trouble-free.

SymSizer size press uneven nip loading solved, a case study

This case study is for a size press which had intermittent problems with sheet breaks when the rolls were nipped up. The problem did not occur every time, so it was difficult to troubleshoot.

Reel safety requires extreme caution and good design features

Reeling is a high-speed, potentially dangerous process. Safe operation of the reel requires alertness on the part of all operating and observing personnel. This article lists general safety recommendations when in or near the reel.

Reel water jet turnup improves reliability and safety, case study

The use of water jet turnup systems at paper, board and tissue reels is growing. Safety, reliability and turnup efficiency are improved while bottom losses are reduced.

Airide maintenance - construction, assembly and adjustment

Airides require minimum maintenance, but should still be inspected and adjusted or replaced periodically. The rubber can get hard and brittle and start to leak.

Fabric guiding - basic rules, guidelines and setup procedures

Guiding of all types of fabrics follows similar basic rules, guidelines, and setup procedures. Here are some of the most important ones…

Hydraulic power unit troubleshooting - symptoms, causes and fixes

Troubleshooting HPUs is easier when you evaluate the symptoms to determine root causes. These troubleshooting charts will help diagnose problems related to pumps, leaks, pressure, noise and heat.

Prevent problems by monitoring roll performance and conditions

When the machine is down, check rolls for: unusual wear or damage to the cover, fatigue-type cracking of the rubber and impact-types of cracks.