US3814335A - Vibro-gyratory mills - Google Patents

Vibro-gyratory mills Download PDF

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Publication number
US3814335A
US3814335A US00295388A US29538872A US3814335A US 3814335 A US3814335 A US 3814335A US 00295388 A US00295388 A US 00295388A US 29538872 A US29538872 A US 29538872A US 3814335 A US3814335 A US 3814335A
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United States
Prior art keywords
floor
treatment chamber
vibro
chamber
mill according
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Expired - Lifetime
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US00295388A
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English (en)
Inventor
D Fahey
Smith D Cunningham
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
William Boulton Ltd
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William Boulton Ltd
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/14—Mills in which the charge to be ground is turned over by movements of the container other than by rotating, e.g. by swinging, vibrating, tilting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/06—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers
    • B24B31/073—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers involving a bowl being ring- or spiral-shaped

Definitions

  • ABSTRACT Vibro-gyratory mills for grinding or finishing purposes having a process chamber of annular shape in plan with a spiral floor and a separating chamber located beneath the upper end of the floor, there being a deflector member pivotally mounted at the region where the upper and lower ends of the floor meet, the deflector member being pivotally movable between a recirculating position in which it forms a chute extending between the upper and lower ends of the floor and a discharge position in which it forms a chute directing the charge from the upper end of the floor to said separating chamber.
  • the invention relates to vibro-gyratory mills which may be used for grinding, polishing, de-burring or similar finishing operations and which effect such operations by means of a vibratory action in the form of a high frequency rotary oscillation about a vertical axis with an upward and downward component in the movement, such action being applied to a charge of workpieces or material, usually mixed with discrete finishing media, contained in the mill.
  • workpieces used hereinafter should be construed as referring not only to components to be polished, de-burred or otherwise finished but also to materials which require to be ground or powdered.
  • the invention provides a vibro-gyratory mill having a processing or treatment chamber which is of annular shape in plan and has an upward slope in the floor, a vibratory mechanism serving to promote progression of a charge of workpieces and media around said chamber, 21 separating chamber including a horizontal separating screen at a level below that of the upper end of the floor of the treatment chamber and having an outlet through which, after screening, separated workpieces can be discharged from the machine, means for returning the media to the lower end of the floor of said treatment chamber, and a deflector member pivotally movable between a recirculating position in which it forms a chute extending between the upper and lower ends of the floor of the treatment chamber, and a discharge position in which it forms a chute directing the charge from the upper end of said floor to said separating screen.
  • said deflector member is pivotally mounted between its ends on an axis extending parallel to the upper edge of said floor and disposed at a level between that of the upper end of the floor and said separating screen.
  • the floor of said treatment chamber is of helical form with a step connecting the upper and lower ends of the heliz, said separating chamber being disposed beneath the upper end of said helix within the confines of the annular treatment chamber.
  • the separating screen is preferably disposed at or below the level of the lower end of the sloping floor of the treatment chamber.
  • F l0. 1 is a fragmentary vertical cross-section through one form of machine according to the invention taken approximately on the line I-l in FIG. 2;
  • FIG. 2 is a plan view of the machine shown in FIG. 1.
  • a vibratory mill comprising a generally cylindrical base portion on which is supported, by a series of coil springs 11, a treatment chamber or bowl 12 of annularshape in plan.
  • the major portion of the floor of the chamber is'of shallow helical form rising from a low level zone 13 to a high level zone 14.
  • the floor of the chamber is of arcuate cross-section and the spaced, parallel walls of the chamber are provided with a rubber or other suitable lining.
  • the treatment chamber surrounds a central sleeve l6, also supported on the springs 11, and within which a vibratory unit is located.
  • This comprises a motor 35 carried by upper and lower support rings 36 and 37 and having a vertical shaft which projects from both ends of the motor casing.
  • Eccentric weights 38 and 39 are carried by the respective ends of the motor shaft and are relatively angularly displaceable to control the motion imparted by the motor to the treatment chamber 12.
  • This movement causes a charge of workpieces and media in the chamber to undergo generally orbital movement in substantially vertical planes while moving up and around the chamber from the low level to the high level zones.
  • the media act upon the workpieces to effect a grinding, finishing or like action which can be varied depending on the speed of rotation and the relative angular displacements of the eccentric weights.
  • a short ramp 18 extends upwardly from the high level zone 14 at a steeper angle than the remainder of the chamber floor, and below this ramp is a separating chamber 24 housing a separating sieve or screen 25 leading to a discharge opening 26 in the outer wall of the chamber.
  • a deflector plate or flow control gate 27 is pivotally mounted about a transverse horizontal axis 28 at a level between the upper end of the ramp and the separating screen. This deflector plate may be moved by any suitable manual or automatic means such as the knob 29 (FIG. 2) between a discharge position shown in broken lines and a recirculating position shown in full lines.
  • the charge falling from the upper end of the ramp 18 is intercepted and directed down the plate 27 into the chamber 24 and on to the screen 25, one component of the charge being retained by the screen and delivered from the machine by way of the discharge opening 26, and the other component falling through the screen into a collecting chamber 30 from whence it is returned to the main chamber 12 by virtue of the vibratory movement imparted to the machine.
  • the parts will generally be larger than the media so that the parts will be discharged from the outlet 26 and the media returned through the screen 25 and chamber 30 for reuse.
  • an additional collecting tray or the like would berequired to receive the material passing through the screen for delivery to a discharge outlet, the media falling from the end of the screen into the collecting chamber and returning from hence to the main chamber 12.
  • the deflector plate 27 When the deflector plate 27 is in its recirculation position the charge of workpieces and media slides down the deflector plate on to a floor plate 31 level with and forming part of the bottom of the main chamber 12 to which the charge is thus returned for recirculation without separating. This can be effected as often as desired and the movement of the deflector plate may be arranged to be effected automatically after the charge has been recirculated a desired number of times.
  • the deflector plate forms a chute extending between the upper and lower levels of the floor of the main chamber 12. During recirculation the charge slides down this chute and does not fall directly from the top end to the bottom end of the floor. As a result of this feature the machine can be used for fine polishing since the surfaces of the parts are not scratched or otherwise damaged during recirculation.
  • the charge is transferred to the separating zone using gravity.
  • Previously proposed machines have utilised a high level separating zone to which the charge must climb, and this arrangement imposes restrictions on the extent to which the vibratory mechanism may be adjusted. By using gravity to transfer the charge for separating, the restrictions on the settings of the motor and weights are removed and a wider range of vibratory movements can therefore be applied to the apparatus.
  • the chamber floor could be level for most of its length and then provided with a steep ramp from which the charge may either fall back into the chamber or be deflected into the separating chamber.
  • a vibro-gyratory mill having a processing or treatment chamber which is of annular shape in plan and has an upward slope in the floor, a vibratory mechanism serving to promote progression of a charge of workpieces and media around said chamber, a separating chamber including a horizontal separating screen at a level below that of the upper end of the floor of the treatment chamber and having an outlet through which, after screening, separated workpieces can be discharged from the machine, means for returning the media to the lower end of the floor of said treatment chamber, and a deflector member pivotally movable between a recirculating position in which it forms a chute extending between the upper and lower ends of the floor of the treatment chamber, and a discharge position in which it forms a chute directing the charge from the upper end of said floor to said separating screen.
  • a vibro-gyratory mill according to claim 2 wherein the floor of said treatment chamber is of helical form with a step connecting the upper and lower ends of the helix, said separating chamber being disposed beneath the upper end of said helix within the confines of the annular treatment chamber.
  • a vibro-gyratory mill according to claim 4 wherein said means for returning the media to said treatment chamber comprises an upwardly sloping ramp having its lower end located beneath said separating screen and its upper end communicating with the lower end of the floor of said treatment chamber, the media discharged through the screen travelling up said ramp under the influence of the vibratory movement.
  • a vibro-gyratory mill according to claim 8 wherein said vibratory mechanism comprises a motor carried by said chamber and having a vertical shaft fitted with eccentric weights.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US00295388A 1971-10-09 1972-10-05 Vibro-gyratory mills Expired - Lifetime US3814335A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4709771A GB1411542A (en) 1971-10-09 1971-10-09 Vibro-gyratory mills

Publications (1)

Publication Number Publication Date
US3814335A true US3814335A (en) 1974-06-04

Family

ID=10443709

Family Applications (1)

Application Number Title Priority Date Filing Date
US00295388A Expired - Lifetime US3814335A (en) 1971-10-09 1972-10-05 Vibro-gyratory mills

Country Status (13)

Country Link
US (1) US3814335A (forum.php)
JP (1) JPS5536463B2 (forum.php)
AT (1) AT323007B (forum.php)
BE (1) BE789874A (forum.php)
CH (1) CH560579A5 (forum.php)
DE (1) DE2248893C3 (forum.php)
ES (1) ES407379A1 (forum.php)
FR (1) FR2155556A5 (forum.php)
GB (1) GB1411542A (forum.php)
HU (1) HU165012B (forum.php)
IT (1) IT974620B (forum.php)
NL (1) NL7203671A (forum.php)
SE (1) SE379494B (forum.php)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387539A (en) * 1981-03-30 1983-06-14 The Hutson Corporation Vibratory actuator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2425094C3 (de) * 1974-05-24 1984-07-05 Carl Kurt Walther Gmbh & Co Kg, 5600 Wuppertal Federnd abgestützter Ringtrog- Vibrations-Scheuerbehälter
FR2299120A1 (fr) * 1975-01-30 1976-08-27 Abral Sarl Procede et machine pour le traitement de surface de pieces faconnees a l'ai

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703995A (en) * 1971-03-16 1972-11-28 Hanna Mining Co Screening apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB862535A (en) * 1959-04-30 1961-03-15 Podmore And Sons Ltd W Improvements in and relating to vibro-gyratory mills
GB1224050A (en) * 1967-12-28 1971-03-03 Kabushi Kaisha Shikishima Tipt Self-separating vibratory finishing apparatus
JPS5210233B2 (forum.php) * 1971-08-25 1977-03-22

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703995A (en) * 1971-03-16 1972-11-28 Hanna Mining Co Screening apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387539A (en) * 1981-03-30 1983-06-14 The Hutson Corporation Vibratory actuator

Also Published As

Publication number Publication date
JPS4872793A (forum.php) 1973-10-01
DE2248893C3 (de) 1982-04-01
HU165012B (forum.php) 1974-06-28
IT974620B (it) 1974-07-10
BE789874A (fr) 1973-04-09
NL7203671A (forum.php) 1973-04-11
GB1411542A (en) 1975-10-29
CH560579A5 (forum.php) 1975-04-15
AT323007B (de) 1975-06-25
ES407379A1 (es) 1975-10-16
JPS5536463B2 (forum.php) 1980-09-20
SE379494B (forum.php) 1975-10-13
DE2248893B2 (de) 1981-06-19
DE2248893A1 (de) 1973-04-19
FR2155556A5 (forum.php) 1973-05-18

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