Wire guide lost
If a wire guide is lost in a paper machine, there are several steps that can be taken to address the issue: 1. Initially, one can guide the forming fabric by hand until repairs can be made. This involves manually aligning and guiding the fabric to ensure it runs smoothly through the machine. 2. If […]
Wire life, short
1. The fourdrinier table must be accurately lined up and in good mechanical condition. — all drainage devices must be firm and set at uniform height. — see that stretcher and automatic tension controls do not bounce. 2. A major cause of short wire life is poor condition of forming table and general housekeeping. — […]
Forming fabric, wear
On topside: 1. Repair or replace apron with more compatible material if needed. 2. Check for abrasive outer return roll surface. — re-cover if necessary. 3. Check shower cleaning system. — replace worn orifices. 4. Check and realign slice. On underside: 1. Check inner wire return roll for doctor loading, bearings, freedom to turn, and […]
Forming fabric, defects
Edge splitting: 1. Check for edge damage due to misalignment of machine and reset guides. 2. For excessive edge wear, improve lubrication and adjust deckle seals. 3. If vacuum box edges are dry, reset deckle seals and improve lubrication. Holes: 1. To remove foreign materials, improve cleaning showers and check incoming stock for contaminant source. […]
Drag wear, wire/fabric
1. Check roll bearings to ensure free rotation. — check roll cover hardness and age. 2. Ensure supporting surfaces are least abrasive material available. 3. Check roll alignment and guide system. 4. Check that furnish is free of abrasive fillers. 5. Ensure that shower water is free of sand or other naturally occurring grit. 6. […]