Flanged perforated metal plate for separation of pellets and particles

Patent metadata

Field	Value
Publication number	US-9296028-B2
Application number	US-201213685107-A
Country	US
Kind code	B2
Filing date	Nov 26, 2012
Priority date	Nov 24, 2009
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

A perforated plate for a vibratory sifter, the perforated plate including a base plate comprising a plurality of openings formed therethrough, and a flange integrally formed with the base plate. A method of forming a screen assembly for a vibratory sifter, the method including forming a base plate, forming a plurality of openings extending from a top surface to a bottom surface of the base plate, and forming an integral flange on the base plate.

First claim

What is claimed:

1. A method comprising:
forming a circular base plate without any openings;
adding a plurality of openings in the base plate, the plurality of openings extending from a top surface to a bottom surface of the base plate to form a perforated base plate; and
forming an integral flange on the base plate, wherein the forming an integral flange comprises:
forming a first portion extending perpendicularly downward from a planar surface of the base plate;
forming a second portion extending radially outward from a lower circumference of the first portion; and
forming a third portion extending radially outward from an outer circumference of the second portion at a predetermined angle.

2. The method of claim 1 , wherein the forming the integral flange comprises:
rotating the base plate at a predetermined speed; and
applying a force to a portion of the rotating base plate proximate an outer circumference.

3. The method of claim 1 , wherein the forming the integral flange comprises stamp pressing the formed base plate.

4. The method of claim 1 , wherein the forming the integral flange comprises vacuum forming the formed base plate.

5. The method of claim 2 , wherein the forming the integral flange further comprises disposing a mold proximate the outer circumference of the base plate.

6. The method of claim 5 , wherein the applying a force to the portion of the rotating base plate comprises applying a tool to the portion and moving the portion into the mold to form the integral flange.

7. The method of claim 1 , further comprising coupling a gasket to the integral flange of the base plate.

8. The method of claim 7 , wherein the coupling comprises inserting the integral flange into a circumferential groove formed on an inside diameter of the gasket.

9. The method of claim 1 , further comprising applying a coating to the base plate.

10. The method of claim 1 , wherein the forming of the plurality of openings is performed prior to the forming of the integral flange.

11. The method of claim 1 , wherein the forming of the plurality of openings is performed after the forming of the integral flange.

12. The method of claim 1 , wherein the forming the second portion comprises forming the second portion parallel to a planar surface of the base plate.

13. The method of claim 1 , wherein the predetermined angle is in a range between 5 degrees and 40 degrees from a plane parallel with the second portion.

14. The method of claim 1 , wherein the second portion and the third portion are located in two different planes.

15. A method comprising:
providing a perforated circular base plate having a plurality of openings extending from a top surface to a bottom surface of the base plate and a flange formed integrally with the perforated base plate, into a screen frame of a vibratory separator; and
coupling a circumferential gasket to the flange to form a screen assembly such that a top surface and a bottom surface of the flange engage a circumferential groove formed on an inner surface of the gasket; and
inserting the screen assembly into a screen frame of a vibratory separator, wherein the circumferential gasket is inserted between two engagement surfaces of the screen frame.

16. The method of claim 15 , wherein the flame comprises:
a first portion extending perpendicularly downward from a planar surface of the base plate;
a second portion extending radially outward from a lower circumference of the first portion; and
a third portion extending radially outward from an outer circumference of the second portion at a predetermined angle.

17. The method of claim 16 , the placing comprising:
placing the third portion, parallel to an engagement surface of the screen frame of the vibratory separator.

18. The method of claim 16 , further comprising disposing the third portion in the circumferential groove.

19. The method of claim 15 , further comprising passing a feed material comprising particles larger and smaller than the plurality of openings through the vibratory sifter.

20. The method of claim 15 , further comprising:
disposing a filter element comprising a filter element frame in the vibratory separator; and
engaging the filter element frame with the flange.

Assignees

• Mi Llc

Inventors

• Smith Joseph Leonard

Classifications

• B07B1/469

  Perforated sheet-like material · CPC title

• Y10T29/49826

  Assembling or joining · CPC title

• B07B1/28 Primary

  Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens · CPC title

• C02F1/34

  with mechanical oscillations · CPC title

• B07B1/46

  Constructional details of screens in general; Cleaning or heating of screens · CPC title