CA1152476A - Grinding device - Google Patents
Grinding deviceInfo
- Publication number
- CA1152476A CA1152476A CA000354381A CA354381A CA1152476A CA 1152476 A CA1152476 A CA 1152476A CA 000354381 A CA000354381 A CA 000354381A CA 354381 A CA354381 A CA 354381A CA 1152476 A CA1152476 A CA 1152476A
- Authority
- CA
- Canada
- Prior art keywords
- grinding
- disc
- stationary
- grlndlng
- grinding disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C7/00—Crushing or disintegrating by disc mills
- B02C7/11—Details
- B02C7/12—Shape or construction of discs
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
A B S T R A C T
A grinding device having a rotatable grinding disc and stationary grinding disc co-axial to the rotatable disc is disclosed. For improved grounding result the grinding sur-face of the stationary grinding disc is divided in a still-standing main portion and a plurality of separately rotatable grinding surface portions which are driveable in selective rotational directions.
A grinding device having a rotatable grinding disc and stationary grinding disc co-axial to the rotatable disc is disclosed. For improved grounding result the grinding sur-face of the stationary grinding disc is divided in a still-standing main portion and a plurality of separately rotatable grinding surface portions which are driveable in selective rotational directions.
Description
~15;~4~6 The present invention concerns a milling or ~rinding devlce havlng a statlonary grinding disc and a rotatable grinding disc coaxial to the stationary disc, said two grinding discs having milling or grinding surfaces.
Wlth the term grindlng device is herein meant also such device~ known a~ reflners and defibrators.
The object of the pre~ent lnvention i~ to provlde a mllllng or grlndlng devlce o the above stated klnd, whlch 1~ ~ultable for qrlndlng (dl~aggregating) Yarious materlals, both flbrou~ materlals, such as wood chlps, and other mate-rlal~, ~uch a~ coffee and graln.
Another object of the lnventlon i8 to provide a grinding devlce offering po~sibllities, during operation, to influence the pattern of movement of the material to be ground as well a~ lt~ tlme of treatment wlthln the devlce, ln order there-by to lmpart to the materlal a more homogenou~ slze.
The~e ob~ect~ have been achleved ln that the grlndlng ~urface of the statlonary grlndlng dl w comprl~e~ a ~tandlng maln portlon and a plurality of portlons belng excentrically let lnto the maln portlon and belng separately drlveable ln ~electlve dlrectlon~ of rotatlon.
The ldea of the lnventlon, thus, 1~ to provlde two gene-rally even grlnding ~urface~, of whlch the ~tandlng one for lmpro~ement of the grlndlng capablllty ha~ been dlvld-d ln one ~tlll ~tatlonary portlon and ~everal ~eparately movable por-tlon~.
An o~bodlm4nt of the lnventlon wlll now be deJcrlbed, r-f-rence b lng made to the accompanylng drawlng~, whereln flga la and lb ~how a grlndlng devlce accordlng to th- ln-v-ntlon, flg. la ~howlng a rotatabl- grlndlng dl~c ~lth drlvlng mean~ and flg. lb showlng the corre~pondlng ~tatlo-nary grlndlng dl~c havlng a plurallty o~ ~eparately drlve-able grlndlng rurface portlon~ let lnto the ~tandlng maln grlndlng ~urface thereof. Flg. 2 ~how~ a part axlal Jectlo-nal vle~ through a grlndlng devlce according to the lnven-tlon. Flg~ 3 and 4 ~how two dlfferent embodiment~ of the ,.~
i~S247~;
~eparately driveable grinding surface~ respectively Figs 5-8 lntend to clarify the functlon of the device flg 5 ln a perspective view showing the relative movement between a rotatable grinding disc and separately driYeable portions of a stationary grinding disc fig 6 ahowing an axial sec-tion through the device of fig S flg 7 showlng in a per-spectlve vieW a portion of a rotatable grlnding di~c and a eparately drlueable portion of a ~tatlonary grinding di~c, whlch latter, for the sake of Yi~uallzation~ 18 ~hown belng tran~parent thereby making a fibre fa~cicle or bundle vi~lble and flg 8 at a larger scale showing the fibre fa~cicle of fig 7 The devlce ~hown ln flg~ la and lb comprises a conventio-nal dri~lng apparatu~ 10 for drlving a rotatable annular grlndlng dlac ll ~his latter comprlse~ a plurality of ring-~ector ~haped grinding means 13 att~ched to a wheel 12 The whoel 12 has a central substantially frusto-conical portion 14, whlch 18 provldod wlth screw-llned feedlng rlb~ 15 Tho whecl 12 1~ aaapted to rotate wlthln a houslng 16 havlng an outlet 17 and belng divlded ln a flr~t part 18 and a second part 19 The two part~ 18 and 19 have cooperatlng flanges 20 and 21 re~pectlvely and corre~pondlng bore~ 22 and 23, respectlvely, ~o that the houslng parts can tlghtly be ~olnted to a unlty (flg 2J
The ~econd houJlng part 19 ha~ a rece~ 24 for the frw to-¢onlcal portlon 1~ o~ the whe-l 12 The rece~ 24 al~o ha~
~cre~-llned fe-dlng rlb~ 25 The rec-~J 24, whlch run~ lnto a cyllndrlaal conn-ctlon portlon 26 for a ~eedlng tubc, wlth lt~ f-~dlng rlb- 25 together wlth tho fru~to-conlcal por-tion 14 ant lt~ fe~dlng rlb~ 15 form a feedlng moa~ havlng an annular pa~age of dimlnlshlng ~ldth from the cyllndrlcal portlon 26 tow~rd~ the hou~lng 16 In thls pa~ago an lnltlal dl~aggr~gatlon of mat-rlal fed take~ place Oppo~lto to the rotatabl- grlndlng di~c 11 of the houslng part 18 the hou~lng part 19 1~ provlded wlth an annular grlndlng dl~c 27, whlch 18 co-axlal to the grlndlng dlsc 11 , 115247~
and also comprises a plurality of ring-sector shaped grind-lng means 28, that in a suitable way are secured to the hou~lng part 19 Up to now the devlce de~crlbed in all essentlal corre-S ~ponds to a conventional grlndlng device or refiner In the grlndlng devlce according to the present inven-tlon, however, the grlndlng surface of the statlonary grlnd-lng dl~c 1~ provlded wlth one or preferably a plurality of lndlvidualIy rotatable grinding surface portions ~n prac-tlce, this is accompllshed by rotatable grinding di~cs 29,whlch are planetarlly dl~poQed in relation to the grindlng dl~c 11 and are let into the surface thereof The grinding dlsc~ 29 wlll herelnafter be referred to as "planet dlscs", wherea~, ln analogy therewlth, the rotatable dl~c 11 wlll lS be referred to a~ ~sun dl~c~ and the ~tatlonary dl~c 27 a ~corona dl~c~
In the embod~ment of the lnventlon shown in flg lb all planet dlsc~ 29 are located with thelr axe~ of rotation equally dlstrlbuted along one and the same clrcle It would, of cour~e, al~o be po~slble to arrange the planet dl~cs at dlfferont radlnl level~ relatlve to the center of the sun and corona dl~c~
In the ombodlmont ~hown a planet dl~c 29 1~ let lnto each grlndlng mean~ 28 Alternatlvely a planet dl~c may be let lnto o g only evory ~econd grlndlng mean~ 28 A~ appear~ e~peclally from flg 2 a planet dl~c 29 18 let into a clrcular roce~J 30 ln a grlndlng moan~ 28 of the hou~lng part 19 and 1J rotatably ~upported by a ~haft 31 that extend~ through th hou~lng part 19 The ~haft 31 1 drlvlngly connoct~a to a motor 32 Por ~xlal ad~u~tment of the grlndlng ~urface of the pla-net dl~c 29 relatl~e to the maln portlon of the grindlng surf~ce of the corona d~c 27, the motor 32, ~y mean~ of a flange integral therewlth, 18 attached to a flanged ~leeve 33 h~vlng outer ~crew thread~ cooperatlng wlth corre~pondlng inner wrew thread~ of a rlng portlon 34 protrudlng from the ~152476 .
housing part lg ~ y turning the sleeve 33 relative to the housing part 19, thus, the planet disc 29 can be axially displaced for adjustment relative to the grinding means 28 of the corona S di~c 27 The shaft 31 is journalled in the sleeYe 33 by means of bearl~gs 35 and i~ sealed towards the houslng part 19 by means of ~eallng 36 For facllltated mountlng, malnten~nce etc , each planet dl~c unit, l e planet dlsc, drlve motor, shaft etc , ls ~ultably detachable a~ a unlt from the hou~lng part 19 In the example ~hown thl~ ha~ been accomplished by di~posing the ~haft 31 and the ~leeve 33 in a cover 38, which is let into the hou~lng part lg and secured thereto by means of ~crew~ 37 Por ad~u~tment of the grindlng ~oad the ~un di~c ll i~
axlally ad~u~table by lt~ ~haft 39, a~ 1~ known ln the art Tho operatlon of the devlce wlll now be descrlbed wlth re~-rence to 1g~ 5-8 In a known manner the materlal to be ground i8 centrally lntroduced ln the devlce and 1~ exposed to an lnltial dl~sggregation treatment ln the dlm~nlJhlng pa-sage between the fru~to-conlcal portlon 14 of the wheel 12 and the rece~ 24 of tho hou~lng p~rt l9 Thereafter tho materlal reache~ the ~pace betw-en the grlndlng meanJ 13 of th- rotatlng aun dlJc ll and the grlndlng ~oan~ 28 of tho ~tatlonary corona dl~c 27, ln whlch latter are let ln plan-t ~l~o~ 29 whlch ar- ~o ad~u-t-d that thelr grlndlng ~urface~
~lu~h wlth th- grlndlng ~urf~co of the corona dl~c 27 In ca-- o~ ~tlll tandlng planet dl~c~ 29 the treatm nt b tween tho un dl-c and ths corona dl~c would be ~ub~tantlally con-ventlonal, but lf tho planet dl~c~ arrang-d accordIng to tho lnvontlon are put lnto rotatlon, the materlal to b- ground wlll bo ~xpo~ed to a twl-tlng mov-~ont, that on flbrou~ ma-torlals provldo- an un-~plnnlng actlon and on other materl~l~
a twl~t-cru-hing~ action AJ an ex~mple there 1~ ~hown ln flg 7 and at a larger Jcale in flg 8 how a fa~clcle of ~iSZ476 fibre~ 40 is twisted and torn under the influence of the two directions of movement when the sun disc 11 and the planet disc 29 are rotated in opposite directions (arrows 41 and 42, respectlvely). In the posltlon shown, the far portion of the S fa~cicle shown partly hidden in fig. 8 is in contact with the grinding means of the sun disc and, thus, moves to the rlght of the drawing, while its nearer portion, relatively ~een, move~ to the left, but above all downward~ due to the contact with the portion of the planet disc 29 in this posi-tion moving downwards in fig. 7.
When the sun disc and the planet disc~ rotate in oppo-~lte dlrection~ (as in fig. 7) the invention brings about the great advantage that un-fini~hed material, i.e. too big particles thereof, when encountering a planet disc, wlll be brought by that planet disc toward~ the center of the sun and corona dlscs ~downward~ ln fig. 7) for further treatment.
Hereby a highly uniformly treated product will re~ult.
Al~o the materlal wlll notbe more treated than necessary, whlch in turn re~ults in considerable energy saving~.
Accordlng to the invention the planet dl ~C8 29 can be driven ln ~electlve dlrectlons o rotatlon ~f~g. 5) relatlve to the rotatable sun dlsc 11, or ln alternatlng dlrectlon~.
In certaln ca~e~ lt may for lnstance be de~lrable to drlve overy ~econd planet dlsc ln rlght hand revolutlon and every ~econd ln left hand revolutlon. The revolutlon ~peed may al~o be lndlvldually varled.
The materlal of the planet dl~c~ and thelr ~urface structure may be varled d-pendlng on the materlal to be ground. In certaln ca~e~ a ~urface ~tructure havlng groove~
and protru~ion~ according to fig. 4, l.e. corre~pondlng to the grlndlng mean~ 28, may be ~uitable. In other case~ pla-net dlsc~ 29' of grlndstone materlal (f~g. 3) may be prefer-red.Thi~ latter materlal ha~ the advantage that the planet dlscs become ~elf-cleanlng.
Wlth the term grindlng device is herein meant also such device~ known a~ reflners and defibrators.
The object of the pre~ent lnvention i~ to provlde a mllllng or grlndlng devlce o the above stated klnd, whlch 1~ ~ultable for qrlndlng (dl~aggregating) Yarious materlals, both flbrou~ materlals, such as wood chlps, and other mate-rlal~, ~uch a~ coffee and graln.
Another object of the lnventlon i8 to provide a grinding devlce offering po~sibllities, during operation, to influence the pattern of movement of the material to be ground as well a~ lt~ tlme of treatment wlthln the devlce, ln order there-by to lmpart to the materlal a more homogenou~ slze.
The~e ob~ect~ have been achleved ln that the grlndlng ~urface of the statlonary grlndlng dl w comprl~e~ a ~tandlng maln portlon and a plurality of portlons belng excentrically let lnto the maln portlon and belng separately drlveable ln ~electlve dlrectlon~ of rotatlon.
The ldea of the lnventlon, thus, 1~ to provlde two gene-rally even grlnding ~urface~, of whlch the ~tandlng one for lmpro~ement of the grlndlng capablllty ha~ been dlvld-d ln one ~tlll ~tatlonary portlon and ~everal ~eparately movable por-tlon~.
An o~bodlm4nt of the lnventlon wlll now be deJcrlbed, r-f-rence b lng made to the accompanylng drawlng~, whereln flga la and lb ~how a grlndlng devlce accordlng to th- ln-v-ntlon, flg. la ~howlng a rotatabl- grlndlng dl~c ~lth drlvlng mean~ and flg. lb showlng the corre~pondlng ~tatlo-nary grlndlng dl~c havlng a plurallty o~ ~eparately drlve-able grlndlng rurface portlon~ let lnto the ~tandlng maln grlndlng ~urface thereof. Flg. 2 ~how~ a part axlal Jectlo-nal vle~ through a grlndlng devlce according to the lnven-tlon. Flg~ 3 and 4 ~how two dlfferent embodiment~ of the ,.~
i~S247~;
~eparately driveable grinding surface~ respectively Figs 5-8 lntend to clarify the functlon of the device flg 5 ln a perspective view showing the relative movement between a rotatable grinding disc and separately driYeable portions of a stationary grinding disc fig 6 ahowing an axial sec-tion through the device of fig S flg 7 showlng in a per-spectlve vieW a portion of a rotatable grlnding di~c and a eparately drlueable portion of a ~tatlonary grinding di~c, whlch latter, for the sake of Yi~uallzation~ 18 ~hown belng tran~parent thereby making a fibre fa~cicle or bundle vi~lble and flg 8 at a larger scale showing the fibre fa~cicle of fig 7 The devlce ~hown ln flg~ la and lb comprises a conventio-nal dri~lng apparatu~ 10 for drlving a rotatable annular grlndlng dlac ll ~his latter comprlse~ a plurality of ring-~ector ~haped grinding means 13 att~ched to a wheel 12 The whoel 12 has a central substantially frusto-conical portion 14, whlch 18 provldod wlth screw-llned feedlng rlb~ 15 Tho whecl 12 1~ aaapted to rotate wlthln a houslng 16 havlng an outlet 17 and belng divlded ln a flr~t part 18 and a second part 19 The two part~ 18 and 19 have cooperatlng flanges 20 and 21 re~pectlvely and corre~pondlng bore~ 22 and 23, respectlvely, ~o that the houslng parts can tlghtly be ~olnted to a unlty (flg 2J
The ~econd houJlng part 19 ha~ a rece~ 24 for the frw to-¢onlcal portlon 1~ o~ the whe-l 12 The rece~ 24 al~o ha~
~cre~-llned fe-dlng rlb~ 25 The rec-~J 24, whlch run~ lnto a cyllndrlaal conn-ctlon portlon 26 for a ~eedlng tubc, wlth lt~ f-~dlng rlb- 25 together wlth tho fru~to-conlcal por-tion 14 ant lt~ fe~dlng rlb~ 15 form a feedlng moa~ havlng an annular pa~age of dimlnlshlng ~ldth from the cyllndrlcal portlon 26 tow~rd~ the hou~lng 16 In thls pa~ago an lnltlal dl~aggr~gatlon of mat-rlal fed take~ place Oppo~lto to the rotatabl- grlndlng di~c 11 of the houslng part 18 the hou~lng part 19 1~ provlded wlth an annular grlndlng dl~c 27, whlch 18 co-axlal to the grlndlng dlsc 11 , 115247~
and also comprises a plurality of ring-sector shaped grind-lng means 28, that in a suitable way are secured to the hou~lng part 19 Up to now the devlce de~crlbed in all essentlal corre-S ~ponds to a conventional grlndlng device or refiner In the grlndlng devlce according to the present inven-tlon, however, the grlndlng surface of the statlonary grlnd-lng dl~c 1~ provlded wlth one or preferably a plurality of lndlvidualIy rotatable grinding surface portions ~n prac-tlce, this is accompllshed by rotatable grinding di~cs 29,whlch are planetarlly dl~poQed in relation to the grindlng dl~c 11 and are let into the surface thereof The grinding dlsc~ 29 wlll herelnafter be referred to as "planet dlscs", wherea~, ln analogy therewlth, the rotatable dl~c 11 wlll lS be referred to a~ ~sun dl~c~ and the ~tatlonary dl~c 27 a ~corona dl~c~
In the embod~ment of the lnventlon shown in flg lb all planet dlsc~ 29 are located with thelr axe~ of rotation equally dlstrlbuted along one and the same clrcle It would, of cour~e, al~o be po~slble to arrange the planet dl~cs at dlfferont radlnl level~ relatlve to the center of the sun and corona dl~c~
In the ombodlmont ~hown a planet dl~c 29 1~ let lnto each grlndlng mean~ 28 Alternatlvely a planet dl~c may be let lnto o g only evory ~econd grlndlng mean~ 28 A~ appear~ e~peclally from flg 2 a planet dl~c 29 18 let into a clrcular roce~J 30 ln a grlndlng moan~ 28 of the hou~lng part 19 and 1J rotatably ~upported by a ~haft 31 that extend~ through th hou~lng part 19 The ~haft 31 1 drlvlngly connoct~a to a motor 32 Por ~xlal ad~u~tment of the grlndlng ~urface of the pla-net dl~c 29 relatl~e to the maln portlon of the grindlng surf~ce of the corona d~c 27, the motor 32, ~y mean~ of a flange integral therewlth, 18 attached to a flanged ~leeve 33 h~vlng outer ~crew thread~ cooperatlng wlth corre~pondlng inner wrew thread~ of a rlng portlon 34 protrudlng from the ~152476 .
housing part lg ~ y turning the sleeve 33 relative to the housing part 19, thus, the planet disc 29 can be axially displaced for adjustment relative to the grinding means 28 of the corona S di~c 27 The shaft 31 is journalled in the sleeYe 33 by means of bearl~gs 35 and i~ sealed towards the houslng part 19 by means of ~eallng 36 For facllltated mountlng, malnten~nce etc , each planet dl~c unit, l e planet dlsc, drlve motor, shaft etc , ls ~ultably detachable a~ a unlt from the hou~lng part 19 In the example ~hown thl~ ha~ been accomplished by di~posing the ~haft 31 and the ~leeve 33 in a cover 38, which is let into the hou~lng part lg and secured thereto by means of ~crew~ 37 Por ad~u~tment of the grindlng ~oad the ~un di~c ll i~
axlally ad~u~table by lt~ ~haft 39, a~ 1~ known ln the art Tho operatlon of the devlce wlll now be descrlbed wlth re~-rence to 1g~ 5-8 In a known manner the materlal to be ground i8 centrally lntroduced ln the devlce and 1~ exposed to an lnltial dl~sggregation treatment ln the dlm~nlJhlng pa-sage between the fru~to-conlcal portlon 14 of the wheel 12 and the rece~ 24 of tho hou~lng p~rt l9 Thereafter tho materlal reache~ the ~pace betw-en the grlndlng meanJ 13 of th- rotatlng aun dlJc ll and the grlndlng ~oan~ 28 of tho ~tatlonary corona dl~c 27, ln whlch latter are let ln plan-t ~l~o~ 29 whlch ar- ~o ad~u-t-d that thelr grlndlng ~urface~
~lu~h wlth th- grlndlng ~urf~co of the corona dl~c 27 In ca-- o~ ~tlll tandlng planet dl~c~ 29 the treatm nt b tween tho un dl-c and ths corona dl~c would be ~ub~tantlally con-ventlonal, but lf tho planet dl~c~ arrang-d accordIng to tho lnvontlon are put lnto rotatlon, the materlal to b- ground wlll bo ~xpo~ed to a twl-tlng mov-~ont, that on flbrou~ ma-torlals provldo- an un-~plnnlng actlon and on other materl~l~
a twl~t-cru-hing~ action AJ an ex~mple there 1~ ~hown ln flg 7 and at a larger Jcale in flg 8 how a fa~clcle of ~iSZ476 fibre~ 40 is twisted and torn under the influence of the two directions of movement when the sun disc 11 and the planet disc 29 are rotated in opposite directions (arrows 41 and 42, respectlvely). In the posltlon shown, the far portion of the S fa~cicle shown partly hidden in fig. 8 is in contact with the grinding means of the sun disc and, thus, moves to the rlght of the drawing, while its nearer portion, relatively ~een, move~ to the left, but above all downward~ due to the contact with the portion of the planet disc 29 in this posi-tion moving downwards in fig. 7.
When the sun disc and the planet disc~ rotate in oppo-~lte dlrection~ (as in fig. 7) the invention brings about the great advantage that un-fini~hed material, i.e. too big particles thereof, when encountering a planet disc, wlll be brought by that planet disc toward~ the center of the sun and corona dlscs ~downward~ ln fig. 7) for further treatment.
Hereby a highly uniformly treated product will re~ult.
Al~o the materlal wlll notbe more treated than necessary, whlch in turn re~ults in considerable energy saving~.
Accordlng to the invention the planet dl ~C8 29 can be driven ln ~electlve dlrectlons o rotatlon ~f~g. 5) relatlve to the rotatable sun dlsc 11, or ln alternatlng dlrectlon~.
In certaln ca~e~ lt may for lnstance be de~lrable to drlve overy ~econd planet dlsc ln rlght hand revolutlon and every ~econd ln left hand revolutlon. The revolutlon ~peed may al~o be lndlvldually varled.
The materlal of the planet dl~c~ and thelr ~urface structure may be varled d-pendlng on the materlal to be ground. In certaln ca~e~ a ~urface ~tructure havlng groove~
and protru~ion~ according to fig. 4, l.e. corre~pondlng to the grlndlng mean~ 28, may be ~uitable. In other case~ pla-net dlsc~ 29' of grlndstone materlal (f~g. 3) may be prefer-red.Thi~ latter materlal ha~ the advantage that the planet dlscs become ~elf-cleanlng.
Claims (3)
1. A grinding device having one stationary grinding disc and a rotatable grinding disc co-axial to the stationary grinding disc, said two grinding discs having cooperating milling or grinding surfaces, characterized in that the grinding surface of the stationary grinding disc comprises a still-standing main portion and a plurality of grinding surface portions located in the main portion and individually driveable in selective directions of rotation.
2. A grinding device according to claim 1, characterized in that each individually driveable grinding surface portion is axially adjustable relative to the main portion of the grinding surface of the stationary grinding disc.
3. A grinding device according to claim 1 or 2, characterized in that each individually driveable grinding surface portion is a part of a detachable unit including a separate grinding disc, which is let into a recess in the stationary grinding disc, a drive shaft, a cover attachable to the housing of the grinding device, a journalling sleeve, and a drive motor attached to the journalling sleeve, said journalling sleeve by means of screw threads being dis-placeable relative to the cover.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7905449A SE419945B (en) | 1979-06-20 | 1979-06-20 | grinder |
| SE79054490 | 1979-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1152476A true CA1152476A (en) | 1983-08-23 |
Family
ID=20338344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000354381A Expired CA1152476A (en) | 1979-06-20 | 1980-06-19 | Grinding device |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5914256B2 (en) |
| CA (1) | CA1152476A (en) |
| DE (1) | DE3021905C2 (en) |
| FI (1) | FI63339C (en) |
| SE (1) | SE419945B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE442826B (en) * | 1984-06-12 | 1986-02-03 | Forenede Bryggerier As | PROCEDURE AND APPARATUS FOR CRAFTING CREAM (SED) |
| GB0120347D0 (en) | 2001-08-21 | 2001-10-17 | Merck Sharp & Dohme | Therapeutic agents |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1889436A (en) * | 1926-10-23 | 1932-11-29 | Coursey William De | Method and apparatus for pulverizing materials |
-
1979
- 1979-06-20 SE SE7905449A patent/SE419945B/en not_active IP Right Cessation
-
1980
- 1980-06-11 DE DE3021905A patent/DE3021905C2/en not_active Expired
- 1980-06-16 FI FI801930A patent/FI63339C/en not_active IP Right Cessation
- 1980-06-18 JP JP55082662A patent/JPS5914256B2/en not_active Expired
- 1980-06-19 CA CA000354381A patent/CA1152476A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS565149A (en) | 1981-01-20 |
| JPS5914256B2 (en) | 1984-04-03 |
| DE3021905A1 (en) | 1981-01-22 |
| SE419945B (en) | 1981-09-07 |
| DE3021905C2 (en) | 1985-11-14 |
| FI63339B (en) | 1983-02-28 |
| FI801930A (en) | 1980-12-21 |
| FI63339C (en) | 1983-06-10 |
| SE7905449L (en) | 1980-12-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |