Head box for use in sheet forming system of machine for manufacturing material web e.g. paper web, has supply device for supplying fiber suspension, and dosing unit provided for dosing medium into individual channels in plastic modules

摘要

The box (1) has a supply device (3) for supplying fiber suspension, and a turbulence generating device for generating turbulent flows. The generating device has plastic modules arranged between running and draining plates. Passage openings accommodate partial areas of individual channels (5.11, 5.21, 5.31, 5.41) of a turbulent block of the generating device, where the openings stay in flow-connection with the plates. A dosing unit (6.1) is provided for dosing medium into the channels in the plastic modules, where the plastic modules extend over partial areas of the turbulent block.