Sheet forming section for paper board machine, has wire section has two dehydrating sections with stationary vacuum-subjected forming shoe, and wire section has shaper for slot with two wires

摘要

The section has a head box with a nozzle area, and a wire section with a shaper (20) for a slot with two wires (21, 22). The wires limit a double wire sheet forming section in which a fiber suspension flow (M) is injected from a discharge gap of the area to form a path between the wires. The wire section has two dehydrating sections (V1, V2), and lamellas maintaining turbulence are not arranged in the area or length of the lamellas arranged in the area is 50 percent of length of the area. The dehydrating sections have a stationary vacuum-subjected forming shoe (30). An independent claim is also included for a method in a paper board machine.