Refiner disc

• US 3,889,890 A
• Filed: 01/21/1974
• Issued: 06/17/1975
• Est. Priority Date: 01/21/1974
• Status: Expired due to Term

• Current Assignee: Sprout-Bauer Incorporated
• Original Assignee: Anton J. Horstman
• Inventors: Horstman, Anton J.
• Primary Examiner(s): Custer, Jr., Granville Y.
• Assistant Examiner(s): Goldberg, Howard N.
• Application Number:
  US05/435,233
• Time in Patent Office: 512 Days
• Field of Search: 241/188A,244-248,251,261.2
• US Class Current: 241/245
• CPC Class Codes: D21D 1/30 Disc mills

Abstract

A feed end disc for a double rotating disc refiner characterized by means which dictate that the materials fed to the refiner will pass to the eye of the refiner in a free moving flow, without building on the disc spokes and without by-pass of the refiner discs. The said means are constituted by lug-like devices which project from the infeed face of the disc to the refiner inlet. As the feed end disc is rotated, each lug-like device employed produces a turbulence and a directional influence on the flow of the material to be refined which draws the material to and through the disc feed passages to the eye of the refiner.

Claims

1. A feed end refining disc for use in a disc refiner comprising a plate-like body having an infeed face, an operating face, and at least one feed passage having an exit end at said operating face and an entrance end opening from said infeed face, characterized by means providing an irregular surface contour on said infeed face at least a portion of which is projected from said infeed face and arranged thereon adjacent and generally clear of said entrance end of said feed passage to inhibit material fed to said infeed face for movement through said feed passage from building up on said infeed face.

2. A feed end disc as in claim 1 wherein said means providing said irregular surface contour on said infeed face includes a lug-like projection at least a portion of which lies to one side of said feed passage.

3. A feed end disc as in claim 2 wherein said lug-like projection is defined by means positioned adjacent the center of said body.

4. A feed end refining disc as in claim 1 characterized by a plurality of said feed passages and said means providing an irregular surface contour on said infeed face including a plurality of lug-like projections which are incorporated to project from said infeed face adjacent to and about the center of said body.

5. A double revolving disc refiner including said feed end disc as in claim 1, a second refining disc positioned in adjacent, opposed, closely spaced relation to said feed end disc to form therebetween a space for receiving material fed through said feed passage and directing such material between the Refining faces of said discs, a refiner case housing said discs, said case having means defining an inlet opening for passing material to the infeed face of said disc and said projected portion extending from said infeed face of said body to the location of said inlet to lie directly in the path of materials fed to said feed passage in the course of rotation of said feed end disc.

6. A feed end refining disc for use in a disc refiner comprising a plate-like body having an infeed face, an operating face, and a plurality of feed passages opening at one end from said operating face and at the opposite end from said infeed face, lateral sides of said passages being defined by spoke-like formations in said body, and means providing an irregular surface contour on said infeed face including lug-like devices projecting from said spoke-like formations to move in the path of material fed to said feed passages on rotation of said plate-like body to influence such material to be channelled to and through said feed passages and to inhibit a build-up of such material on said infeed face.

7. A feed end disc for use in a disc refiner comprising a plate-like body having an infeed face, an operating face, and a plurality of feed passages opening at one end from said operating face and at the opposite end from said infeed face, the lateral extremities of said passages being defined by a plurality of spokes formed in said body adjacent its center, said spokes having a generally radial orientation and a limited radial extent, and means defining an irregular surface contour on said infeed face including means defining projections from said infeed face within the radial limits of said spokes.

8. A feed end disc as in claim 7 wherein said projections are constituted by lug-like formations which are positioned to project from the radially innermost portions of said spokes.

9. A feed end disc as in claim 8 characterized by the lateral sides of said projections having a non-parallel relation and intersecting at one radial limit thereof.

10. A feed end disc as in claim 7 wherein said projections have a radial extent less than that of the spokes from which they project.

11. A feed end disc as in claim 10 wherein said projections are laterally centered on said spokes.

12. A feed end disc as in claim 10 wherein said projections are characterized by generally radially oriented sides which converge in a sense outwardly from the infeed face of said body.

13. A feed end disc as in claim 10 characterized by said projections having generally radially oriented sides which are generally parallel and the lateral extent of said projections is substantially equal to that of the spokes from which they project.

14. A feed end disc as in claim 13 characterized by the generally radially oriented sides of said projections being sloped to slightly overlap adjacent lateral extremities of feed passages.

15. A feed end disc as in claim 7 characterized by said projections forming at least part of a separable structure which is releasably connected to the infeed face of said plate-like body.

16. A feed end disc as in claim 15 wherein said releasable structure embodies a channeling ring arranged to rim said feed passages and to function to direct material for movement through said feed passages.

17. A double revolving disc refiner including a feed end refining disc, comprising a plate-like body having an infeed face, an operating face and a plurality of feed passages opening at one end from said operating face and at the opposite end from said infeed face, a second refining disc positioned in adjacent, opposed, closely spaced relation to the operating face of said feed end disc to form therewith a space for receiving material fed through said feed passages and directing such material between refining faces of the discs, a refiner case housing said discs, said case having means defining an opening providing an inlet for passing material to the infeed face of said feed end disc, the lateral extremities of said feed passages being defined by spokes formed in said body of said feed end disc, each of which spokes includes means forming a projection from said infeed face of said body, a feed chute in connection with said refiner case the discharge end of which rims said inlet, further means in connection with the infeed face of said plate-like body extending to said inlet to form a continuation of the passage defined by said feed chute and to peripherally rim said feed passages at said infeed face whereby to confine and direct material fed through said feed chute to move to the infeed face of said feed end disc and said feed passages, and said projections from said spokes being directed toward said inlet and into the material fed to said infeed face of said plate-like body as the material is advanced for movement to and through said feed passages, to produce a controlled movement of said material obviating by-pass of said plate-like body by said material, influencing the channelling thereof directly through said feed passages and inhibiting the build-up of said material on said spokes.