US2981212A - Quick change roller die assembly - Google Patents

Quick change roller die assembly Download PDF

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Publication number
US2981212A
US2981212A US787596A US78759659A US2981212A US 2981212 A US2981212 A US 2981212A US 787596 A US787596 A US 787596A US 78759659 A US78759659 A US 78759659A US 2981212 A US2981212 A US 2981212A
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United States
Prior art keywords
die
shaft
sleeve
die assembly
rollers
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Expired - Lifetime
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US787596A
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Harvey S Landers
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/20—Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring
    • B30B11/201—Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring for extruding material
    • B30B11/202—Ring constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/20—Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring
    • B30B11/201—Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring for extruding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/026—Mounting of dies, platens or press rams
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/23—Hay wafering or pelletizing means

Definitions

  • This invention relates to pellet mills such as those used in the preparation of feed for livestock. Particularly, the invention is directed to an assembly including a rotating cylindrical extrusion die and rollers therein mounted on a non-rotating shaft.
  • An object of the invention is to provide a removable roller and die assembly which may be quickly installed in and removed from a pellet mill, thereby reducing the time the mill is not producing, for example, when repairs or die changes are being made.
  • Another object ofthe invention is to provide means whereby the rollers may be adjusted to the dies prior to installation in the mill, thus reducing delay in production.
  • a further object of the invention is to provide a rugged removable roller and die assembly, yet one which will not damage the mill in the event extraneous matter jams the rotating die.
  • Figure 1 is a broken side elevation and sectional view of a portion of a pellet mill and including the present removable roller and die assembly which comprises a feature of the present invention.
  • Figure 2 is a broken elevation and sectional view similar to Figure 1, but showing the roller and die assembly partly removed from the outer drive sleeve.
  • Figure 3 is an end view of the roller and die assembly and showing the radial die openings by means of broken section
  • Figure 4 is an end view of the tapered nut which detachably secures the inner drive sleeve in the outer drive sleeve.
  • the pellet mill shown in the drawing includes a frame having front and rear walls 11 and 12 secured to each other by spacers 13, but it is to be understood that instead of spacers a continuous wall (not shown) may be provided so that the frame, in effect will be a housing.
  • the assembly 15 comprising the primary feature of the invention includes an inner drive sleeve 16 having a circular extending flange 17 on its outer end for supporting a cylindrical extrusion die 18.
  • the outer face of the flange 17 is recessed to receive the inner end of the die '18 which is held in place by bolts 19 recessed in and extending through said flange.
  • the die 18 and flange 17 are positioned outwardly of and spaced from the outer surface of the front wall 11, and the inner drive sleeve 16 is of sufficient length to extend to the rear wall 12.
  • a spout extending into the die 18 for supplying the bulk material to be pelletized.
  • the shaft 20 is supported in tapered roller bearings 23 mounted in each end of the inner drive sleeve 16, and the shaft 20 is shouldered, as at a, just inwardly of the rollers 21 to engage the inner race of the adjacent said bearing.
  • the shaft 20 is threaded, as at b, where the same is provided with a nut 24 and washer 25 for bearing against the inner race of the other tapered bearing 23.
  • the extending rear portion of the shaft 20 is tapered at c where it is received in a flanged shear pin hub 26, and the extending end of the shaft 20 is threaded to receive a nut 27 and washer 28 which bear against the outer surface of said shear pin hub.
  • Keys 29 and keyways 30 in the shaft 20 and hub 26 at the tapered portion secure the shaft against rotation.
  • rollers 21 are rotatably mounted between inner and outer carrier plates 31 and 32 which are secured to the nonrotating shaft 20.
  • the inner plate 31 is rigidly secured to the shaft 20-, whereas the outer plate 32 is removable.
  • Each roller 21 is mounted on a stub shaft 33, which rollers, in practice, are eccentrically mounted, not shown, for adjusting the rollers 21 relative to the inner surface of the die 18.
  • Nuts 34 on the outer ends of the stub shafts 33 secure the outer plate 32 in place.
  • the flanged shear pin hub 26 is supported in a C-shaped bracket 35 mounted on the outer surface of the rear wall 12, and shear pins 36, threadedly engaged in the bracket, project into corresponding openings 37 in the flange 38 of the hub.
  • an outer drive sleeve 40 Rotatably mounted in the front and rear walls 11 and 12, and around and spaced from the inner drive sleeve 16, there is an outer drive sleeve 40 having a driven pulley 4'1 thereon intermediate its ends.
  • a driven gear may be used instead of pulley 41.
  • the ends of the outer sleeve 40 are supported in tapered bearings 42 mounted in the front and rear walls 11 and 12, and the pulley 41 is secured to rotate with the outer sleeve 44) by means of a key 43 therebetween.
  • Keys 44 in the end of the outer sleeve 40 adjacent the die 18 secure said outer sleeve to the inner sleeve 16, and keyways (not numbered) are tapered to limit inward movement of said die.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Grinding (AREA)

Description

April 1961 H. s. LANDERS 2,981,212
QUICK CHANGE ROLLER DIE ASSEMBLY Filed Jan. 19, 1959 HARVEY s. LANDERS INVENTOR.
A TTORNE Y United States Patent QUICK CHANGE ROLLER DIE ASSEMBLY Harvey S. Landers, 207 E. Broadway, Fort Worth, Tex. Filed Jan. 19, 1959, Ser. No. 787,596
3 Claims. (Cl. 107-14) This invention relates to pellet mills such as those used in the preparation of feed for livestock. Particularly, the invention is directed to an assembly including a rotating cylindrical extrusion die and rollers therein mounted on a non-rotating shaft.
An object of the invention is to provide a removable roller and die assembly which may be quickly installed in and removed from a pellet mill, thereby reducing the time the mill is not producing, for example, when repairs or die changes are being made.
Another object ofthe invention is to provide means whereby the rollers may be adjusted to the dies prior to installation in the mill, thus reducing delay in production.
A further object of the invention is to provide a rugged removable roller and die assembly, yet one which will not damage the mill in the event extraneous matter jams the rotating die.. These and other objects will become apparent from the following description and accompanying drawing, wherein:
Figure 1 is a broken side elevation and sectional view of a portion of a pellet mill and including the present removable roller and die assembly which comprises a feature of the present invention.
Figure 2 is a broken elevation and sectional view similar to Figure 1, but showing the roller and die assembly partly removed from the outer drive sleeve.
Figure 3 is an end view of the roller and die assembly and showing the radial die openings by means of broken section, and
Figure 4 is an end view of the tapered nut which detachably secures the inner drive sleeve in the outer drive sleeve.
The pellet mill shown in the drawing includes a frame having front and rear walls 11 and 12 secured to each other by spacers 13, but it is to be understood that instead of spacers a continuous wall (not shown) may be provided so that the frame, in effect will be a housing.
The assembly 15 comprising the primary feature of the invention includes an inner drive sleeve 16 having a circular extending flange 17 on its outer end for supporting a cylindrical extrusion die 18. The outer face of the flange 17 is recessed to receive the inner end of the die '18 which is held in place by bolts 19 recessed in and extending through said flange. The die 18 and flange 17 are positioned outwardly of and spaced from the outer surface of the front wall 11, and the inner drive sleeve 16 is of sufficient length to extend to the rear wall 12.
Extending through and spaced from the inner drive sleeve 16 there is a main shaft 20- supporting a pair of rollers 21' which make rolling contact with the inner surface of the die 18 for pressing bulk materials through radial die openings 22 therein. Not shown in the drawing, and forming no part of the present invention, there a spout extending into the die 18 for supplying the bulk material to be pelletized. The shaft 20 is supported in tapered roller bearings 23 mounted in each end of the inner drive sleeve 16, and the shaft 20 is shouldered, as at a, just inwardly of the rollers 21 to engage the inner race of the adjacent said bearing. The shaft 20 is threaded, as at b, where the same is provided with a nut 24 and washer 25 for bearing against the inner race of the other tapered bearing 23. The extending rear portion of the shaft 20 is tapered at c where it is received in a flanged shear pin hub 26, and the extending end of the shaft 20 is threaded to receive a nut 27 and washer 28 which bear against the outer surface of said shear pin hub. Keys 29 and keyways 30 in the shaft 20 and hub 26 at the tapered portion secure the shaft against rotation.
Referring now to the opposite end of the shaft 20, the rollers 21 are rotatably mounted between inner and outer carrier plates 31 and 32 which are secured to the nonrotating shaft 20. The inner plate 31 is rigidly secured to the shaft 20-, whereas the outer plate 32 is removable. Each roller 21 is mounted on a stub shaft 33, which rollers, in practice, are eccentrically mounted, not shown, for adjusting the rollers 21 relative to the inner surface of the die 18. Such adjustability of rollers is conventional and forms no part of the present invention, and therefore, the same is not herein described in detail. Nuts 34 on the outer ends of the stub shafts 33 secure the outer plate 32 in place. The flanged shear pin hub 26 is supported in a C-shaped bracket 35 mounted on the outer surface of the rear wall 12, and shear pins 36, threadedly engaged in the bracket, project into corresponding openings 37 in the flange 38 of the hub.
Rotatably mounted in the front and rear walls 11 and 12, and around and spaced from the inner drive sleeve 16, there is an outer drive sleeve 40 having a driven pulley 4'1 thereon intermediate its ends. A driven gear, not-shown, may be used instead of pulley 41. The ends of the outer sleeve 40 are supported in tapered bearings 42 mounted in the front and rear walls 11 and 12, and the pulley 41 is secured to rotate with the outer sleeve 44) by means of a key 43 therebetween. Keys 44 in the end of the outer sleeve 40 adjacent the die 18 secure said outer sleeve to the inner sleeve 16, and keyways (not numbered) are tapered to limit inward movement of said die. In the end of the outer sleeve 40 opposite the last described keys 44, there is a tapered nut 45 threadedly engaged on the end of the inner drive sleeve 16. Any suitable means may be employed for turning the nut 45, and in the drawing projecting lugs 46 are shown and whereby the nut may be tightened or loosened by harnmering.
It is contemplated that replacement roller and die assemblies 15 will be on hand during milling operations.
Thus, by merely manipulating two nuts, 27 and 45, the
assemblies may be quickly and conveniently changed.
The invention is not limited to the exemplary construction herein shown and described, but may be made in various ways within the scope of the appended claims.
What is claimed is: 1. In a pellet mill, spaced front and rear supports, a driven outer sleeve rotatably mounted in said spaced supports, an inner drive sleeve received within and extending through said outer sleeve, a shaft extending through said inner sleeve, a cylindrical die mounted on an extending end of said inner sleeve, rollers mounted on said shaft and in turning contact with the inner surface of said cylindrical die, means securing said inner sleeve and said outer sleeve against relative rotation, a nut having an elongate body threaded on said inner sleeve opposite said die and engaging said outer sleeve at the end thereof opposite said rollers for detachably securing said inner sleeve in said outer sleeve, a nut on said shaft opposite said rollers and engaging said inner sleeve, and detachable means securing said shaft against rotation and whereby said shaft, said inner sleeve, said die and said rollers may be removed from said outer sleeve as a unit.
2. In a pellet mill as defined in claim 1, the construe r 2,981,212 tion wherein said nut on said inner sleeve opposite said shear pin hub, and at least one'key interconnectin'gsaid die has a tapered outer surface and engages a correspond- 1111b and Said shaft to Prevent fl. 0f the latter ing surface in the end of said driven outer sleeve for fric- References Cited in the file of this patent tional engagenment therein.
' 3. In a pellet mill as defined in claim 1, the construc- 5 1 382 606 3333 STATES 21 192] tion wherein said detachable means securing said shaft 2:240:66) Meakin Z May 6 1941 against rotation is comprised of a shear pin hub, shear 2 700 9 1 John on Feb 1: 1955 pins therein and connected with said mill, mounted on 2,798,444 M aki July 9, 1957 said mill, an end of said shaft being received within said 10 2,887,718 Curran et a1. May 26, 1959
US787596A 1959-01-19 1959-01-19 Quick change roller die assembly Expired - Lifetime US2981212A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139844A (en) * 1962-06-13 1964-07-07 Harvey S Landers Quick change roller die assembly
US3232245A (en) * 1962-08-23 1966-02-01 Massey Ferguson Inc Feeding and compaction means for hay wafering apparatus
US3825387A (en) * 1971-05-07 1974-07-23 California Pellet Mill Co Quick-change die and roller assembly
US3911550A (en) * 1972-03-30 1975-10-14 California Pellet Mill Co Quick-change die and roller assembly
EP0571175A2 (en) * 1992-05-18 1993-11-24 California Pellet Mill Company Apparatus for providing rapid die change capability to a pellet mill
US5585124A (en) * 1994-12-29 1996-12-17 Andritz Sprout-Bauer, Inc. Quill shafted pellet mill

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1382606A (en) * 1919-06-03 1921-06-21 Norton Co Mounting for grinding-machine spindles
US2240660A (en) * 1940-02-26 1941-05-06 Edgar T Meakin Extrusion mill
US2700941A (en) * 1950-04-03 1955-02-01 Johnson Clyde Vern Pellet machine
US2798444A (en) * 1952-11-29 1957-07-09 Edgar N Meakin Feed mechanism for extrusion mills
US2887718A (en) * 1955-02-15 1959-05-26 Sprout Waldron & Co Inc Pellet mill

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1382606A (en) * 1919-06-03 1921-06-21 Norton Co Mounting for grinding-machine spindles
US2240660A (en) * 1940-02-26 1941-05-06 Edgar T Meakin Extrusion mill
US2700941A (en) * 1950-04-03 1955-02-01 Johnson Clyde Vern Pellet machine
US2798444A (en) * 1952-11-29 1957-07-09 Edgar N Meakin Feed mechanism for extrusion mills
US2887718A (en) * 1955-02-15 1959-05-26 Sprout Waldron & Co Inc Pellet mill

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139844A (en) * 1962-06-13 1964-07-07 Harvey S Landers Quick change roller die assembly
US3232245A (en) * 1962-08-23 1966-02-01 Massey Ferguson Inc Feeding and compaction means for hay wafering apparatus
US3825387A (en) * 1971-05-07 1974-07-23 California Pellet Mill Co Quick-change die and roller assembly
US3911550A (en) * 1972-03-30 1975-10-14 California Pellet Mill Co Quick-change die and roller assembly
EP0571175A2 (en) * 1992-05-18 1993-11-24 California Pellet Mill Company Apparatus for providing rapid die change capability to a pellet mill
EP0571175A3 (en) * 1992-05-18 1994-02-23 California Pellet Mill Co
US5542838A (en) * 1992-05-18 1996-08-06 California Pellet Mill Company System providing rapid die change capability to a pellet mill
US5585124A (en) * 1994-12-29 1996-12-17 Andritz Sprout-Bauer, Inc. Quill shafted pellet mill

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