EP1098754A1 - Compacting installation for a powder compacting machine - Google Patents
Compacting installation for a powder compacting machineInfo
- Publication number
- EP1098754A1 EP1098754A1 EP99947216A EP99947216A EP1098754A1 EP 1098754 A1 EP1098754 A1 EP 1098754A1 EP 99947216 A EP99947216 A EP 99947216A EP 99947216 A EP99947216 A EP 99947216A EP 1098754 A1 EP1098754 A1 EP 1098754A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- compacting
- screw
- stub
- unit according
- 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.)
- Granted
Links
Classifications
-
- 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
- B30B11/18—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using profiled rollers
-
- 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
- B30B11/16—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using pocketed rollers, e.g. two co-operating pocketed rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B3/00—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
- B30B3/04—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs co-operating with one another, e.g. with co-operating cones
Definitions
- the present invention relates to a compacting unit for a powder compacting machine according to the preamble of the main claim.
- Such compactor should be well known, see e.g. Brochure "powtec compacting / granulating machine RC 100 x 30 for laboratory and production.”
- compacting machines according to this invention are preferably designed for small throughputs and thus for processing small batches of up to approximately 2 kg and less.
- a particular problem of such Ko paktierwerke for processing small batches is the inevitable reject that is present in the compacting unit after the batch has been processed.
- the powder to be processed practically settles in the compacting unit and is not included in the usable discharge of the compacting unit. If you want to process another batch in the next operation, the compacting unit must be dismantled and cleaned. The remaining quantities that remain in the compacting plant should therefore be as small as possible. It is therefore a basic requirement to make the compacting unit easily accessible and dismantled. In some compacting plants, this is achieved by a so-called floating bearing of the drive shafts. In these compacting plants, the compression elements are accessible from the front without having to disassemble the drive shafts.
- a serious disadvantage of flying storage lies in the considerably high bearing forces that result from the leverage effect.
- the high bearing forces require a complex construction and result in relatively high machine manufacturing costs.
- the invention solves this problem with the features of the main claim.
- the advantage of the invention is that, with a small residual quantity and thus a small amount of scrap after processing a batch, the set-up time for cleaning the compacting plant is short.
- the rollers are easy to replace, and rollers with different surface properties can be quickly and easily removed and installed. This advantage is achieved through the successful integration of the principle of compacting units with a two-sided drive shaft into a design with easy access to the roller attachment without dismantling the upstream bearing position.
- the drive shaft is supported on two sides.
- the plane of rotation of the compression elements lies in the middle area between the bearing points. Normally, this is a pair of compaction rollers that mesh synchronously with each other to form a non-contact nip.
- the powder material is conveyed into the compaction gusset and, due to the convergent geometry, forced into the nip where the compaction takes place.
- the tripartite division of the drive shaft is of practical importance. This creates two shaft ends, each of which is intercepted in a bearing, while the shaft center piece is firmly connected to the compacting roller.
- the bearing stub and the shaft center piece have mutually associated rotary drivers, the rotary drivers are e.g. Can be brought into or out of engagement in the transverse direction or in the longitudinal direction to the longitudinal axis of the drive shaft.
- roller center piece together with the compacting roller can be rotated in at least one Remove the position transversely to the longitudinal direction from the drive shaft.
- the entire housing space, which surrounds the compression elements, is thus easily accessible and can therefore be cleaned with little effort.
- rotary drivers are coupled with the complementary rotary drivers with the aid of an axial tensioning device, which presses the two shaft ends from one side against the shaft center piece, in a rotationally rigid manner.
- Decisive for the invention is the combinatorial effect, which arises from the three-part division of the drive shaft, while at the same time a rotationally rigid drive shaft is made possible via the rotary drivers as soon as the shaft center piece is inserted between the shaft ends.
- the axial tensioning device brings about a form-fitting engagement of the mutually associated rotary drivers, which also excludes relative movements between the shaft ends and the shaft centerpiece in the micrometer range even under the operating loads, in particular due to transverse loads.
- shaft ends in their part housings can be sealed off from the compacting housing using oil seals.
- cylindrical roller bearings also offers the advantage of large ratios of outside diameters to inside diameters.
- the load-bearing cross sections of the drive shaft can be made correspondingly large, so that hollow shafts are also possible.
- Hollow shafts also offer the advantage that the axial clamping device can be realized by a clamping screw which extends from one shaft stub through the shaft center piece into the other shaft stub and is screwed in there while it is with the underside of its screw head on the first shaft stub supports.
- the clamping screw with its screw shank sits practically free of play in the through hole of the shaft center piece and also in the adjacent holes in the shaft stub, a continuous connection is created between the shaft stub, which is practically only subjected to bending.
- the cross-section of the screw shank can be chosen to be large enough to withstand even the highest operating loads. Since the screw shaft is stressed solely by bending, a play to transition fit between the through hole and the screw shaft is sufficient. A press fit is not necessary.
- the clamping screw can be equipped with a push-off device, which makes disassembly easier.
- the drive shaft can be hollow cylindrical with a large diameter using cylindrical roller bearings, it is sufficient to design the rotary drivers as tongue and groove combinations for the transmission of the torques that occur. Each tongue and groove combination runs secantial or diametrical to the drive shaft. Experiments have shown that a single tongue and groove combination can be sufficient for each pair of rotary drivers. However, other embodiments are not excluded by this.
- FIG. 1 shows an exemplary embodiment of a compacting unit according to this invention
- FIG. 2 shows a stub shaft, for example the stub shaft on the driven side
- FIG. 3 frontal view of a compacting roller with shaft center piece
- Fig. Side view of a compacting roller with shaft center piece Fig. 5 detailed view of an axial tension screw
- Fig. 6 top view of the tension screw according to Fig. 5
- Fig. 7 another embodiment of the invention
- 8 shows another embodiment of the invention. Unless otherwise stated below, the following description always applies to all figures.
- a vertically extending filler neck 3 is accommodated in a machine frame 2, the filler opening of which is accessible from the outside.
- the filler neck 3 opens into a vertical feed hopper 4.
- An agitator 5 rotates in the convergent hopper area.
- a screw conveyor 6 is coupled coaxially with the agitator 5.
- the agitator and conveyor worm are driven via an angular gear 7 at the upper end of the feed hopper 4.
- a worm motor 8, which is coupled to the input side of the angular gear 7, is used for this purpose.
- the powder is fed to the compacting unit 9, which is arranged below the feed hopper 4.
- the compacting unit 9 essentially has two compression elements 10, 11.
- these are two compaction rollers which are arranged parallel to one another, the distance between the roller axes being slightly larger than the sum of the two roller radii.
- a convergent compacting gusset 12 is formed below the outlet zone of the feed hopper 4 and is fed by the powder which leaves the mouth 13 of the screw conveyor.
- the rotary movement of the compacting rollers is such that their surfaces in the compacting gusset have speeds of the same direction and of the same size. With regard to the powder fed in there and to be compacted, there is therefore no relative speed between the two surfaces of the compacting rollers in the longitudinal direction of the compacting gusset. The convergence of the gusset geometry is therefore fully used to compress the powder introduced. If these are rollers with a smooth surface, a so-called slug is formed, which can then be easily granulated.
- the rollers can also have matching recesses, for example for briquetting, pelleting.
- the compacting unit 9 receives its rotary motion impressed by the compacting unit motor 14, which is either connected to one of the two drive shafts of the compression elements 10, 11 via a transfer case or only to one of the drive shafts.
- the first drive shaft drives the second drive shaft and in this way the second compression element via a spur gear pair.
- Downstream processing can take place at output 15 of the compacting unit, e.g. through a pelletizer 16.
- Fig.l shows further details.
- the compacting unit has a symmetrical structure and consists of two compaction rollers.
- the drive shaft 17 of the first compacting roller 10 is connected in a rotationally fixed manner to the compacting unit motor 14.
- the power flow takes place from the compactor motor 14 via the drive shaft le 17 on the gear 19 arranged on the end face. This is in constant engagement with a further spur gear 19 a, which is coupled to the drive shaft 18 of the second compacting roller 11.
- each spur gear 19, 19a is coupled to the corresponding drive shaft via a parallel key 20, 20a.
- the pitch circle radii of the spur gears 20, 20a are of the same size, and consequently the rotational speeds of the two compacting rollers correspond identically.
- the drive shaft 17 - and likewise the drive shaft 18 - in the longitudinal region in front of and behind the compacting roller 10 and 11 each form a shaft stub 23 or 24, at least one of which is under the torque 50 of the drive shaft 17, at its inner end 25 or 26 carries a rotary driver 27 or 28.
- first division plane 21 or 22 for each drive shaft 17 or 18.
- the shaft is in this way radially interrupted in the longitudinal region between the two division planes 21, 22.
- a piece has been removed from the through drive shaft, so to speak.
- This removed piece is now the subject of a shaft center piece 29 which is connected to the compacting roller 10 or 11.
- the shaft center piece carries complementary rotary drivers to the rotary drivers 27 and 28, respectively.
- the rotary drivers are in positive engagement with each other.
- the rotary drivers are unrestrained with respect to the transverse direction to the drive shaft 17 or 18.
- the compacting roller with the shaft center piece can be pulled out transversely between the shaft ends 23, 24, as long as the corresponding rotational position of the compacting unit allows this with respect to the compacting housing which is open at the top.
- an axial clamping device 30 is provided, which couples the two shaft ends to the shaft center piece in a rotationally rigid manner when the shaft center piece is in an inserted position between the shaft ends.
- the degrees of freedom must allow a transverse movement of the compacting rollers 10, 11 with regard to the respectively selected rotary drivers 27, 28 as soon as the axial tensioning device is released.
- the required transverse strength of the assembled drive shaft with a compacting roller must be guaranteed.
- this is realized by the clamping screw, which forms the axial clamping device 30.
- Fig.l shows that each of the shaft ends 23, 24 is rotatably supported in the housing of the compacting unit 9 in a roller bearing 31, 32, 33, 34.
- the exemplary embodiments shown are cylindrical roller bearings which are sealed in the direction of the compacting housing by means of additional sealing rings.
- the sealing level of the oil seals practically ends with the bearing housings for the respective stub shaft. Since the cylindrical roller bearings shown enable a large ratio of the outside diameter to the inside diameter, both shaft ends can be provided with an aligned bore 36 together with the shaft center piece 29.
- a clamping screw 37 is introduced as an axial clamping device, which has a thread 38 on its screw tip. This thread 38 corresponds to a hollow thread 39 in the first stub shaft 23.
- the clamping screw 37 in turn is supported with the underside of its screw head 14 on the end face of the second stub shaft 24.
- the clamping screw 37 is tightened, an axial tensioning force is created in this way, which forces the first stub shaft 23 and the second stub shaft 24 in the direction of the compacting roller 10. In this way, the compacting roller 10 is clamped between the first shaft end 23 and the second shaft end 24.
- the diameter of the screw shaft 41 is fitted into the bore 36 with a transition fit (eg H7, h7 or H7, f8). The area of the transition fit extends from the first shaft stub 23 via the shaft center piece into the second shaft stub 24.
- the larger diameter of the screw shaft is freely movable in the axial direction. There, the screw is only in direct contact with the wall of the bore 36 in order to absorb the transverse loads that occur without play.
- the length of the screw shaft is therefore less than the length of the mutually aligned bores in the first shaft stub, shaft center piece and second shaft stub up to the point where the first shaft stub 23 has the screw thread for the screw tip.
- clamping screw 37 is provided on its screw head 40 with a support ring 42, with which the clamping screw 37 rests on the free end face of the second shaft end 24 and in this way couples the axial clamping force into the hollow shaft combination.
- Fig. 5 shows further details of the clamping screw 37.
- Screw tip to a smaller diameter thread 38 which is offset from the screw shaft 41 via an expansion zone 43.
- the large-diameter screw shaft is chamfered with a conical insertion zone and then merges into a finely machined longitudinal area 44. In this finishing zone, a transition fit is made between the screw shaft 41 and the bore 36. This zone practically extends into the bearing area of the outer shaft end 24 in order to achieve the required tight fit between the screw shaft 41 and the bore 36 there.
- the screw shank can then continue, with a small diameter, down to the screw head 40.
- the screw head 40 offers on the one hand a key engagement surface and on the other hand a support ring 42 which, in the installed state, rests on the free end face of the second shaft stub 24.
- the support ring is provided with continuous threaded bores in the longitudinal direction, which open blindly in front of the end face of the second shaft end 24 in the assembled state of the tensioning screw.
- a forcing screw can be screwed in here, which then, when the screw thread 38 is unscrewed, presses the clamping screw 37 axially out of its installed position.
- two such forcing threads 45 lie diametrically opposite to the longitudinal axis of the screw. In this way it is ensured that tilting of the clamping screw 37 is avoided during removal.
- FIGS. 2 to 4 show details of the shaft ends or the shaft center piece.
- FIG. 2 shows, for example, a stub shaft 24 which is not coupled to the motor 14 of the compacting unit.
- a cutout 46 is provided, which serves to receive a feather key 20, 20a.
- a rotationally fixed connection is established between the shaft end 24 and the relevant spur gear 19, 19a, while at the same time the spur gear can be pushed onto the shaft end 24 in the axial direction.
- Additional ring grooves are provided on both sides of the ends of the milling 46, which serve to axially secure the spur gear in question.
- a diametrically extending spring is provided on the inward-facing ends of the shaft end 24, which allows two projections to be formed on the otherwise smooth end face of the hollow shaft end.
- the end face is the radial parting plane of the drive shaft, from which the rotary drivers then claw. protrude like that in order to cooperate with complementary trained rotary drivers on the shaft center piece.
- the shaft center piece 29 has two correspondingly diametrically mounted recesses 47, the contour of which is complementary to the rotary drivers 27, 28.
- the shaft center piece can be pulled out transversely to the longitudinal direction of the drive shaft when the tensioning screw 37 is removed. However, this also removes the compacting roller 10, which is integrally connected to the shaft center piece 29, from the compacting housing.
- FIGS. 7 and 8 show further special features.
- the rotary drivers are formed here by axial bores 48a, b, c, which are each made in the shaft center piece 29 and in the shaft ends 23, 24.
- the axial bores can be brought into a common aligned position.
- the complementary rotary drivers are formed by a plug-in bolt 49, which fits through the axial bores 48a, b, c.
- the insertion pin 49 has an external thread at its insertion end, which corresponds to an associated internal thread in the first shaft stub 23.
- the insert bolt 49 can be screwed into the axial bore 48a, b, c so far that it lies flush with the underside of its bolt head on the outer surface of the bearing ring 42 and can thus be tightened.
- FIG. 7 shows as a further special feature that the spur gear 19 lies on the side of the compacting unit on which the torque 50 is also introduced by the compacting unit motor 14.
- This measure offers the advantage that, in principle, a pair of rotary drivers is only to be provided on one end face of the shaft center piece 29.
- FIG. 8 additionally shows that in this case the pairing of rotary drivers and complementary rotary drivers only has to lie on that side of the shaft center piece 29 where the torques necessary for compacting actually have to be introduced.
- the shaft center pieces 29 can have smooth end faces.
- FIG. 8 also shows the peculiarity that the torque transmission from the drive shaft 17 to the spur gear 19 can take place via a double-screwed driving ring 52 which has two concentric bolt circles.
- the inside bolt circle 53 lies inside half of the end face, which is provided by the drive shaft 17.
- the outer bolt circle 54 lies within the end face, which is provided by the spur gear 19.
- Corresponding screw holes are arranged in alignment in the drive shaft 17 or the spur gear 19 behind the bolt circles, so that there is a pairing of circularly arranged driving screws, which results in a torque-safe transmission of the torque 50 introduced to the other drive shaft 18.
- the clamping screw 37 is arranged within a centering sleeve 51. In this way, the transverse forces and bending moments, which are transmitted to the shaft combination via the compacting unit, are absorbed by the relatively easy-to-manufacture centering sleeve 51, while the clamping screw 37 can consist of an inexpensive standard part.
- Powder compacting machine machine frame, filler neck, intake funnel, agitator, screw conveyor, angular gear, worm motor, compacting unit, first compression element, second compression element, compacting gusset, mouth of the screw conveyor, compacting unit motor, output of the compacting unit, downstream pelletizing unit, drive shaft of 10 drive shaft, 11 spur gear and spur gear, parallel key, second shaft end, second shaft end, of the first component 24 rotary drivers on 23 rotary drivers on 24 shaft center piece axial clamping device Rolling Bearing Rolling Bearing Rolling Bearing Simmering Bore Clamping Screw Thread Hollow Thread Screw Head Screw Shank Bearing Ring Expansion Zone Finished Longitudinal Area Extraction Thread Milling Recess a Axial Bore b Axial Bore c Axial Bore Insert Bolt Torque Centering Sleeve Driving Ring Inner Bolt Circle Outer Bolt Circle
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
- Crushing And Grinding (AREA)
- Pretreatment Of Seeds And Plants (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
- Processing Of Solid Wastes (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Road Paving Machines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19832520A DE19832520B4 (en) | 1998-07-20 | 1998-07-20 | Compacting unit for a powder compacting machine |
DE19832520 | 1998-07-20 | ||
PCT/DE1999/002197 WO2000005062A1 (en) | 1998-07-20 | 1999-07-19 | Compacting installation for a powder compacting machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1098754A1 true EP1098754A1 (en) | 2001-05-16 |
EP1098754B1 EP1098754B1 (en) | 2003-03-26 |
Family
ID=7874638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99947216A Expired - Lifetime EP1098754B1 (en) | 1998-07-20 | 1999-07-19 | Compacting installation for a powder compacting machine |
Country Status (8)
Country | Link |
---|---|
US (1) | US7112052B1 (en) |
EP (1) | EP1098754B1 (en) |
JP (1) | JP3997055B2 (en) |
AT (1) | ATE235368T1 (en) |
DE (2) | DE19832520B4 (en) |
ES (1) | ES2190659T3 (en) |
PT (1) | PT1098754E (en) |
WO (1) | WO2000005062A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19832520B4 (en) | 1998-07-20 | 2005-03-24 | Teller, Bernd | Compacting unit for a powder compacting machine |
DE10317312A1 (en) * | 2003-04-14 | 2004-11-25 | Langenstein & Schemann Gmbh | Device for holding at least one roller of a rolling machine |
JP6369759B2 (en) * | 2015-04-15 | 2018-08-08 | 新東工業株式会社 | Compression roll assembling jig and compression roll assembling method in dry granulator |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE891642C (en) * | 1949-07-02 | 1953-10-01 | Reinhold Netze | Roll, in particular calender and rolling mill roll |
US2662002A (en) * | 1951-02-14 | 1953-12-08 | Frederick A Sunderhauf | Method of embossing rolls |
US3234769A (en) * | 1962-07-17 | 1966-02-15 | Kocks Gmbh Friedrich | Rolling-mill stand with exchangeable rolls |
US2941465A (en) * | 1959-03-25 | 1960-06-21 | Perkins & Son Inc B F | Removable roll means for calender |
US3143769A (en) * | 1963-08-15 | 1964-08-11 | Komarek Greaves And Company | Briquetting roll pockets |
JPS5921415A (en) * | 1982-07-26 | 1984-02-03 | Sumitomo Electric Ind Ltd | Rolling roll |
US4608007A (en) * | 1983-05-13 | 1986-08-26 | Wood Errol A | Oat crimper |
DE3427420A1 (en) * | 1984-07-25 | 1986-01-30 | SMS Schloemann-Siemag AG, 4000 Düsseldorf | COMPOSITE ROLLER |
CS271380B1 (en) | 1988-08-31 | 1990-09-12 | Vaclav Hladky | Rolling machine with working rolls' quick-change |
US6092753A (en) * | 1993-06-01 | 2000-07-25 | Koenig; Larry E. | Material processing apparatus |
DE19832520B4 (en) | 1998-07-20 | 2005-03-24 | Teller, Bernd | Compacting unit for a powder compacting machine |
-
1998
- 1998-07-20 DE DE19832520A patent/DE19832520B4/en not_active Expired - Lifetime
-
1999
- 1999-07-19 ES ES99947216T patent/ES2190659T3/en not_active Expired - Lifetime
- 1999-07-19 EP EP99947216A patent/EP1098754B1/en not_active Expired - Lifetime
- 1999-07-19 PT PT99947216T patent/PT1098754E/en unknown
- 1999-07-19 AT AT99947216T patent/ATE235368T1/en not_active IP Right Cessation
- 1999-07-19 DE DE59904755T patent/DE59904755D1/en not_active Expired - Lifetime
- 1999-07-19 JP JP2000561038A patent/JP3997055B2/en not_active Expired - Lifetime
- 1999-07-19 WO PCT/DE1999/002197 patent/WO2000005062A1/en active IP Right Grant
- 1999-07-19 US US09/744,049 patent/US7112052B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0005062A1 * |
Also Published As
Publication number | Publication date |
---|---|
US7112052B1 (en) | 2006-09-26 |
WO2000005062A1 (en) | 2000-02-03 |
ES2190659T3 (en) | 2003-08-01 |
JP3997055B2 (en) | 2007-10-24 |
DE19832520B4 (en) | 2005-03-24 |
JP2002521203A (en) | 2002-07-16 |
EP1098754B1 (en) | 2003-03-26 |
DE59904755D1 (en) | 2003-04-30 |
ATE235368T1 (en) | 2003-04-15 |
PT1098754E (en) | 2003-08-29 |
DE19832520A1 (en) | 2000-02-10 |
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