Date of Award
Bachelor of Science
Paper Science and Engineering
Dr. Ellsworth H. Shriver
The objective of this study was to examine the effects of a formation shower and serrated slice on formation, with comparison of an existing fourdrinier shake, at normal operating headbox consistencies and higher than normal consistencies. By replacing the shake with one of the other methods, metal fatigue could be stopped at the pivot point of the oscillating fourdrinier. The high consistency was used to determine if one of these alternative devices would eliminate flocculation tendencies and allow the reduction of water removal demand.
The papermachine used in this study was a pilot plant machine running at 60 FPM and producing a 60 lb sheet using 50% hardwood and 50% softwood furnish.
The formation shower was difficult to utilize without making significant design changes, because of the configuration of the slice area. Because of this, its performance was unsatisfactory.
None of the methods deterred the tendency of the fibers to flocculate at high consistencies. It is possible that the formation shower could effect it to some degree if attached closer to the slice with a sufficient water jet pressure.
It was discovered that the serrated slice actually improved the formation quality significantly. This device is simple to construct and requires no fresh water or moving parts, and should be considered for further study.
There was also evidence from the tensile results which not only indicated directionality of fibers, but flocs as well.
Cady, Jeffrey M., "The Effects of a Formation Shower and Serrated Slice on a Pilot Plant Papermachine" (1990). Paper Engineering Senior Theses. 20.