Method and machine for manufacturing paper products using fourdrinier forming
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 stack 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.
1. A wet end for a Fourdrinier machine, the wet end comprising:
I. a forming board section comprising:
A. a plurality of fixed blade and
B. a plurality of height adjustable blades each including:
a control subassembly that controls height relative to an underside of a forming fabric;
II. a hydrofoil section having:
A. a plurality of height adjustable blades and
B. a plurality of angle adjustable blades each including:
a control subassembly that controls a height of a respective blade relative to the underside of the forming fabric, and wherein the plurality of angle adjustable blades each have a control subassembly that controls an angle of a respective blade relative to the underside of the forming fabric; and,
III. a low-vacuum section comprising:
A. at least one vacuum assisted foil unit and
B. at least one vacuum unit,
wherein the vacuum assisted foil unit comprises:
a plurality of height adjustable blades each including a control subassembly that controls height relative to the underside of the forming fabric, and
wherein the at least one vacuum unit comprises a plurality of angle adjustable blades each including a control subassembly that controls an angle of a respective blade relative to the underside of the forming fabric.
2. The wet end of claim 1 , wherein each of the height adjustable blades comprise:
a height adjustment control mechanism and an adjustable T-bar which extends across a frame of the Fourdrinier machine and having a drive that raises and lowers the adjustable T-bar to adjust the height of the blade in relation to the underside of the forming fabric.
3. The wet end of claim 1 , wherein each of the angle adjustable blades comprise:
an angle adjustment mechanism,
wherein underside of the angle adjustment mechanism is secured to a frame of the Fourdrinier machine and said angle adjustment mechanism includes an adjustable T-bar that extends across the frame of the Fourdrinier machine, the angle adjustment mechanism including a drive that rotates a leading edge of the angle adjustable blade over a range of angles.
4. The wet end of claim wherein the forming board section includes a plurality of angle adjustable blades.
5. The wet end of claim 4 , wherein the forming board section is located upstream of the hydrofoil section, and
wherein each of the plurality of angle adjustable blades includes an angle adjusting mechanism that is secured with the C-channel via a clamping bar, and wherein each of the plurality of angle adjustable blades include a blade and a protective shield is provided on the blade to prevent items from being caught when the angle adjusting mechanism is actuated.
6. The wet end of claim 5 , wherein the low vacuum section is downstream of the hydrofoil section.
7. A wet end for a Fourdrinier Machine comprising:
means for initially controlling the orientation of fibers in a paper web deposited onto a forming fabric by operating a forming fabric in a rush, drag, or square mode to align a majority of said fibers in either a machine direction or cross machine direction;
means for individually raising and lowering a plurality of height adjustable blades either to create turbulence and high water removal from the paper web or to create turbulence and retard water removal from the paper web; and,
means for individually adjusting a plurality of angle adjustable blades either to create turbulence and high water removal from the paper web or to create turbulence and retard water removal from the paper web.
8. A wet end for a Fourdrinier machine comprising:
I. a forming board section having a forming board lead blade that is stationary and is arranged substantially near a breast roll;
II. a hydrofoil section comprising:
a. a plurality of height adjustable blades and
b. a plurality of angle adjustable blades, the plurality of height adjustable blades and the plurality of angle adjustable blades are adjustable to create turbulence and promote water drainage when paper fibers in a paper web are aligned in a machine direction, and are adjustable to create turbulence and retard water removal when paper fibers in a paper web are aligned in a cross-machine direction; and
III. a low-vacuum section comprising:
a plurality of height adjustable blades, and
a plurality of angle adjustable blades,
Wherein the plurality of height adjustable blades and the plurality of angle adjustable blades are adjusted to create turbulence and promote water drainage when paper fibers in a paper web are aligned in a machine direction, and are adjusted to create turbulence and retard water removal when paper fibers in a paper web aligned in a cross-machine direction.
9. The wet end of claim 8 , wherein the forming board section includes a plurality of height adjustable blades.
10. The wet end of claim 9 , wherein the forming board section and the hydrofoil section are located upstream of the low-vacuum section,
wherein each of the plurality of angle adjustable blades includes an angle adjusting mechanism that is secured with a C-channel via a clamping bar, and wherein each of the plurality of angle adjustable blades include a blade and a protective shield that is provided on the blade to prevent items from being caught when the angle adjusting mechanism is actuated.
11. The wet end of claim 10 , wherein the low vacuum section is downstream of the hydrofoil section.
12. A wet end for a Fourdrinier comprising:
I. a forming board section comprising a plurality of fixed blades;
II. a gravity assisted hydrofoil section comprising:
A. a plurality of height adjustable blades and
B. a fixed foil blade, wherein the plurality of height adjustable blades are adjustable to create turbulence and water drainage when paper fibers in a paper webbing are aligned in a machine direction, and are adjustable to create turbulence and retard water removal when paper fibers in a paper webbing are aligned in a cross-machine direction; and,
III. a low-vacuum section comprising:
A. vacuum assisted drainage elements; and
B. a plurality of height adjustable blades;
wherein the plurality of height adjustable blades are adjustable to create turbulence and water drainage when paper fibers in a paper webbing are aligned in a machine direction, and are adjustable to create turbulence and retard water removal when paper fibers in a paper webbing are aligned in a cross-machine direction.
13. The wet end claim 12 , wherein the forming board section comprises:
three fixed blades and
three height adjustable blades which are arranged alternately, the three height adjustable blades each including a control subassembly that controls height relative to an underside of a forming fabric.
14. The wet end claim 12 , wherein the hydrofoil section includes:
three height adjustable blades, the fixed blade and the three height adjustable blades being alternatively arranged,
wherein the three height adjustable blades each include a control subassembly that controls a height of a respective blade relative to an underside of a forming fabric, the three angle adjustable blades each including a control subassembly that controls an angle of a respective blade relative to the underside of the forming fabric.
15. The wet end claim 12 , wherein the plurality of height adjustable blades in a first section of the low-vacuum section are six height adjustable blades, said six height adjustable blades each including a control subassembly that controls height relative to an underside of a forming fabric, and wherein the first section comprises one fixed blade, and
wherein a second section of the low-vacuum section comprises seven angle adjustable blades sandwiched by two fixed blades, said seven adjustable angle blades each including a control subassembly that controls an angle of a respective blade relative to the underside of the forming fabric.
16. The wet end of claim 12 , wherein the forming board section includes a plurality of angle adjustable blades.
17. The wet end of claim 16 , wherein the hydrofoil section is located upstream of the low-vacuum section,
wherein each of the plurality of angle adjustable blades includes an angle adjusting mechanism that is secured with the C-channel via a clamping bar, and wherein each of the plurality of angle adjustable blades include a blade and a protective shield is provided on the blade to prevent items from being caught when the angle adjusting mechanism is actuated.
18. The wet end of claim 17 , wherein the low vacuum section is downstream of the hydrofoil section.