Screen production method

Patent metadata

Field	Value
Publication number	US-11273466-B2
Application number	US-202016897517-A
Country	US
Kind code	B2
Filing date	Jun 10, 2020
Priority date	Dec 13, 2017
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

A method for producing a cylindrical screen device with a plurality of profiled bars. The outer face of a plurality of mutually spaced annular bar holders, which are arranged perpendicular to the cylinder axis, are provided with recesses that are open at the edges. The recesses have a shape that substantially corresponds to the base of profiled bars in a complimentary manner. The recesses are marginally larger than the bases. The profiled bars are inserted into respective recesses, parallel to one another and parallel to cylinder axis.

First claim

What is claimed is:

1. A screen production method, comprising:
providing a cylindrical screen device defining a cylinder axis, the cylindrical screen device including a plurality of profiled bars, each of the plurality of profiled bars including a base, a plurality of annular bar holders which are mutually spaced apart from one another and arranged perpendicular to the cylinder axis of the cylindrical screen device, each of the plurality of annular bar holders having edges and an outer face which is provided with recesses that are open at the edges, the recesses having shapes substantially corresponding to the bases of the plurality of profiled bars, the recesses being marginally larger than the bases of the plurality of profiled bars, the recesses being parallel to one another and parallel to the cylinder axis;
inserting the plurality of profiled bars into respective recesses; and
pressing the plurality of profiled bars radially into the respective recesses via radial forces acting onto the plurality of profiled bars until a form-fitting connection is produced, the radial forces only being applied against the plurality of profiled bars, the radial forces being an increasingly more uniform force during the pressing step, the radial forces being simultaneously applied.

2. The method according to claim 1 , wherein the plurality of profiled bars are fastened in the respective recesses of the plurality of bar holders exclusively through a clamping that occurs as a result of the step of pressing the plurality of profiled bars.

3. The method according to claim 1 , wherein each of the plurality of bar holders has an inside, the inside of the plurality of bar holders is not subjected to supporting or bending forces during the step of pressing the plurality of profiled bars.

4. The method according to claim 1 , wherein the cylindrical screen device further includes ram segments, and the step of pressing the plurality of profiled bars occurs via the ram segments acting radially inward upon the plurality of profiled bars.

5. The method according to claim 4 , wherein the ram segments are arranged at equal distances over a circumference of the plurality of bar holders.

6. The method according to claim 4 , wherein the ram segments respectively act upon a number of the plurality of profiled bars.

7. The method according to claim 4 , wherein the ram segments are guided in a radially movable manner.

8. The method according to claim 7 , wherein the ram segments are fastened axially relative to the cylinder axis.

9. The method according to claim 4 , wherein each of the ram segments includes a pressing surface, the pressing surface is of a concave design facing in a direction of the plurality of profiled bars.

10. The method according to claim 9 , wherein the cylindrical screen device has an outer radius, wherein the pressing surface of each ram segment is formed perpendicular to the cylinder axis by a circular segment, the circular segment having a radius that corresponds to the outer radius of the cylindrical screen device.

Assignees

• Voith Patent Gmbh

Inventors

• Brettschneider Werner
• Kauer Ingo
• Schädler Melanie
• Burger Ralf

Classifications

• B07B1/4618 Primary

  Manufacturing of screening surfaces · CPC title

• D21D5/16

  Cylinders and plates for screens · CPC title

• B07B1/18

  Drum screens · CPC title

• B01D33/067

  Construction of the filtering drums, e.g. mounting or sealing arrangements · CPC title

• B01D29/445

  Bar screens · CPC title