Method and machine for manufacturing paper products using fourdrinier forming

摘要

An improved method for producing paper from pulp includes a plurality of subassemblies arranged in the forming or wet section of a Fourdrinier. The Fourdrinier includes a dewatering table having a plurality of blades that are static and on-the run adjustable in height and/or angle to control orientation of paper fibers in the stock to create a superior quality of paper and improved paper strength characteristics. Gravity and vacuum assisted drainage elements are equipped with on-the-run adjustable angle and height dewatering foil blades starting from a paper dryness of 0.1% and extending all the way to 5% dryness. The result of this process and machine is to improve the paper quality, save fibers and chemicals and fulfill the required paper properties.

主权项

1. A wet end for a Fourdrinier machine, the wet end comprising:
I. a forming board section comprising: a forming board and
A. a plurality of height adjustable blades located downstream of the forming board in a machine direction, each of the plurality of height adjustable blades including:
a control subassembly that controls height relative to an underside of a forming fabric; II. a hydrofoil section having:
a plurality of height adjustable blades each including:a control subassembly that controls a height of a respective blade relative to the underside of the forming fabric, wherein the hydrofoil section is a gravity drainage section; and, III. a low-vacuum section comprising:
A. a plurality of vacuum assisted foil units andB. at least one vacuum unit,
wherein each of the vacuum assisted foil units comprise:a plurality of height adjustable blades each including a control subassembly that controls height relative to the underside of the forming fabric, anda fixed blade at each end of each of the vacuum assisted foil units with the plurality of height adjustable blades located therebetween.