Search results

The purpose, operation and maintenance of belted threaders

Typical threading of a winder starts at the unwind stand and continues to the cores. The equipment used to thread the sheet must be maintained for optimal running. This is a refresher on general operation of a belted threader, installation of belts and maintenance schedule.

Review of the types of roll misalignment and alignment methods

Alignment of rollers is critical to keep the web and fabrics running true without wrinkles and tight/baggy lanes. Where the rollers are determines how good the alignment must be.

Troubleshooting cores falling during a winder auto setchange

Every winder core loader eventually runs into the same problem at some point - the cores fall during the set change process. This article lists safety concerns, probable causes and corresponding corrective actions to diagnose and resolve this problem.

Understanding the Converflo and Concept IV-MH headboxes

Converflo headboxes use a dump valve as a vacuum breaker. When functioning correctly the valve prevents damage to the flow sheets when the headbox is shut down.

Journal inspection, dryer bearing fit and internal clearance

After a dryer front bearing has been removed, the bearing fit and new bearing to be installed internal clearance should be inspected. The following procedures cover journal and bearing inspection.

Machine direction coat weight barring solved, a case study

Chronic machine direction coat weight barring at this mill was traced to reel vibration and solved by installing a compliant reel drum cover.

Webinar presents ways to improve safety around the winder

The batch process occurring five to ten times per hour at the winder represents one of highest potential areas of danger in the mill for operators and maintenance personnel. A free webinar on August 3rd, 2016 explored ways to mitigate this risk. The webinar is now archived and available for playback.

Field Report - Minimizing paper curl

Paper curl is critical for many grades of paper, such as copy machine paper, papers that get coated and printed on and multi-layer paperboard grades.What causes curl and how can it be minimized?

Easier boiler outages with Liquor to Liquor Shutdown Service

Planning and executing a boiler outage can be a major challenge. Valmet has created a new lean concept for liquor to liquor recovery boiler outages that is easy, fast and trouble-free.

Enhanced steaming provides better chip impregnation, case study

When entering the chip bin, about one third of a chip's volume is air. In order for the white liquor to impregnate fast and evenly, the chips must be well steamed and the air content as low as possible.