EP0396199A1 - Pelleter for feed and the like - Google Patents
Pelleter for feed and the like Download PDFInfo
- Publication number
- EP0396199A1 EP0396199A1 EP90201107A EP90201107A EP0396199A1 EP 0396199 A1 EP0396199 A1 EP 0396199A1 EP 90201107 A EP90201107 A EP 90201107A EP 90201107 A EP90201107 A EP 90201107A EP 0396199 A1 EP0396199 A1 EP 0396199A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- die
- clamping
- pulley
- die holder
- centering
- 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
Images
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
- B30B11/20—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
- B30B11/208—Roller constructions; Mounting of the rollers
Definitions
- the invention relates to a pelleter for feed and the like, comprising an annular extrusion die which is secured to a die holder by means of tie rods, said die holder being bearing-mounted on a stationary main shaft, a driving pulley being mounted on the die holder for rotating the extrusion die.
- pelleter is known from applicant's European patent application 0,246,710.
- pelleter it is difficult to draw the annular die to the die holder in a centred manner, because the free end of the tie rods is disposed in a space that does not allow easy access, being enclosed between a wall of the die holder and the driving pulley mounted on said die holder.
- the die has,to be barred when the screwed rods are drawn, i.e.
- the die has to be rotated through parts of a turn so as to allow the interspaced screwed rods along the circumference to be drawn one by one, and, moreover, in a non-sequential order. Disassembling the die is also difficult in that the die often becomes wedged within the conical edge of the die holder and consequently has to be pressed clear from the die holder by means of locking nuts.
- the invention aims to overcome these drawbacks and, accordingly, to provide a pelleter allowing ready assembly and disassembly of the die and permitting controlled centering.
- the pelleter according to the invention is characterized in that the extrusion die is firmly drawn onto the driving pulley, which forms one whole with the die holder.
- the ends of the screwed rods, which do not allow easy access have been moved to the other side of the driving pulley, which does allow easy access, and, furthermore, the possibilty is created of elegantly solving the centering problems during assembly and the problems of wedging during disassembly.
- three clamping/centering units are arranged along the circumference in regularly spaced interrelationship, the free end of a screwed rod projecting outside the corresponding clamping/centering unit and being securable to it by means of a securing nut.
- the clamping/centering unit By loading the clamping/centering unit in the opposite direction, the die, when drawn against the die holder, can be pushed clear uniformly, thus ensuring that the die comes off the conical centering edge when disassembled.
- the known pelleter shown in Fig. 1 comprises an annular die 1 mounted on a die holder 5 which is bearing-mounted on a stationary main shaft 2.
- the main shaft 2 is supported by a machine frame 10.
- Mounted on the die holder 5 is a driving pulley 9 adapted to be driven by an electric motor for rotating the annular die 1 about the stationary main shaft 2
- Arranged within the die 1 are two press rollers 3 mounted on press roller shafts 8.
- the press roller shafts 8 comprise eccentric bearing journals 4 which serve for adjusting the press rollers 3 in the direction of the die 1.
- the shaft journals disposed on the left-hand side of Fig. 1 are mounted in a front plate 12, while the shaft journals 4 disposed on the right-hand side are mounted in recesses provided in the end plate of the stationary main shaft 2.
- adjustment of the press rollers 3 is preferably effected through an adjusting apparatus as described in the co-pending European patent application based on Netherlands patent application No.8901130.
- the die 1 comprises a conical edge which is drawn against the conical edge 6 of the die holder 5 by means of screwed tie rods 7. As shown in Fig. 1 the ends of the tie rods 7 are not readily accessible because they are disposed in a space bounded on opposite sides by the die holder 5 and the driving pulley 9, respectively.
- the material to be processed in the pelleter is supplied in the direction of the arrow X to the interior of the rotating, annular die 1 driving the press rollers 3.
- the press rollers 3 press the material through the channels provided in the annular die 1, after which the product leaves the pelleter in granular or pellet form in the direction designated by arrow Y
- Fig. 2 shows the pelleter according to the invention, the driving pulley 9 and the die holder 5 being combined into a single member.
- a recess 26 Provided in the driving pulley/die holder 9, 5 is a recess 26 extending in circumferential direction, in which three clamping/centering units 11 can be arranged in regularly interspaced relationship along the circumference for drawing the die 1 against the conical edge 6 of the combined driving pulley/die holder.
- the construction of the clamping/centering unit 11 is shown in detail in Figs. 3-4.
- Fig. 4 shows the pulley/die holder 9, 5 bearing-mounted on the stationary main shaft 2 of the pelleter.
- the pulley/die holder has a conical centering edge 6 on its side proximal to the die 1, and the die 1 has a corresponding conical centering edge.
- Provided in the die 1 are a plurality of journal holes 13 arranged in regularly interrelationship along the circumference for receiving the end 14 of a screwed rod 7.
- the screwed rod 7 extends through an opening in the pulley/die holder 9, 5 and a clamping/centering unit 11, the end face 20 of the clamping/centering unit 11 forming a stop for the die 1 when the securing nut 23 is tightened.
- the clamping/centering unit 11 comprises a hydraulic cylinder 12 which is mounted by means of bolts 15 on the bottom of the groove-shaped recess 26 provided in the pulley /die holder 9, 5.
- the hydraulic cylinder 12 comprises an oil chamber 17 to which oil can be supplied under pressure via an oil duct 18.
- a pressure sleeve 16 Arranged round the screwed rod 7 is a pressure sleeve 16, which can be slid relatively to the screwed rod 7.
- the left-hand end 20 of the pressure sleeve 16 projects outside the end face of the pulley/die holder 9, 5 and forms a stop for the edge of the die 1.
- the right-hand end of the pressure sleeve 16 projects from the end wall of the cylinder 12 and forms a stop for a nut 21 to be mounted to the screwed rod 7.
- the pressure sleeve 16 has the form of a piston 25, which can be loaded in two directions.
- a packet of Belleville washers 19 are arranged which load the piston 25 and hence the screwed rod 7 in one direction, the centering edge of the die 1 being drawn against the conical edge 6 of the pulley/die holder 9, 5.
- the oil chamber 17 of the hydraulic cylinder 12 is bounded on the left side by the piston 25 of the pressure sleeve 16 and on the right side by the end face of the hydraulic cylinder 12.
- oil seals necessary in various places and accordingly provided in practice, have been omitted from the drawings.
- a pressure block 22 Provided between the securing nut 23 and the end face of the hydraulic cylinder 12 is a pressure block 22.
- a total of three clamping/centering units 11 are provided along the circumference of the pulley/die holder 9, 5. Between each pair of clamping/centering units 11 one or two locking bolts 24 may further be provided for drawing the die 1 against the pulley/die holder 9.
- a die 1 is mounted on a pulley/die holder 9 as follows:
- each pressure sleeve 16 in Fig. 4 is pressed to the left, the spring packet 19 thus being compressed.
- the end 20 of each pressure sleeve 16, which end forms a stop, is thus pressed further from the pulley/die holder 9 than shown in Fig. 4.
- the hollow space within each pressure sleeve 16 is empty, i.e. the tie rods 7 have not yet been mounted in the pressure sleeves 16.
- the die 1, comprising three tie rods 7 which are screwed into the tapped holes 13, is then moved against the projecting stops 20, the three tie rods 7 projecting through the corresponding pressure sleeves 16.
- the centering edge of the die remains clear of the centering edge 6 of the pulley/die holder 9.
- a nut 21 is tightened on the end of the tie rod 7 that projects outside the pressure sleeve 16.
- the die 1 is disassembled in the following manner: - unscrew and remove the locking bolts 24 (Fig. 5), - remove the securing nuts 23 and the pressure blocks 22, - pressurize simultaneously the oil chambers 17 of the clamping/centering units 11, the centering edge of the die 1 thus being forced clear of the conical centering edge 6 of the pulley/die holder 9, - after unscrewing the nuts 21 remove the die with the tie rods 7 screwed into them horizontally using suitable hoisting apparatus.
- the clamping/centering unit 11 shown in Fig. 3 is different from the one in Fig. 4 only in that the hydraulic control is absent.
- the spring packet 19 is mounted on the other side of the piston 25 on.the pressure sleeve 16, and accordingly presses the pressure sleeve 16 to the left (Fig. 3), so that the end 20, forming a stop, extends outside the pulley/die holder 9 by the maximum distance. In this position the die 1 is drawn against the stops 20 by tightening the nuts 21, the conical edge of the die 1 still remaining clear of the conical edge 6 of the pulley/die holder 9.
- the die is then drawn against the edge 6 by alternately and turn-by-turn tightening the nuts 23 of the clamping/centering units 11 distributed along the circumference.
- the spring packets 19 cause the die 1 to be pressed clear.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Forging (AREA)
Abstract
Description
- The invention relates to a pelleter for feed and the like, comprising an annular extrusion die which is secured to a die holder by means of tie rods, said die holder being bearing-mounted on a stationary main shaft, a driving pulley being mounted on the die holder for rotating the extrusion die.
- Such a pelleter is known from applicant's European patent application 0,246,710. In that pelleter it is difficult to draw the annular die to the die holder in a centred manner, because the free end of the tie rods is disposed in a space that does not allow easy access, being enclosed between a wall of the die holder and the driving pulley mounted on said die holder. To prevent the die from skewing and thus assuming a skewed position when the die is drawn against a conical edge of the die holder, the die has,to be barred when the screwed rods are drawn, i.e. the die has to be rotated through parts of a turn so as to allow the interspaced screwed rods along the circumference to be drawn one by one, and, moreover, in a non-sequential order. Disassembling the die is also difficult in that the die often becomes wedged within the conical edge of the die holder and consequently has to be pressed clear from the die holder by means of locking nuts.
- The invention aims to overcome these drawbacks and, accordingly, to provide a pelleter allowing ready assembly and disassembly of the die and permitting controlled centering.
- To that effect the pelleter according to the invention is characterized in that the extrusion die is firmly drawn onto the driving pulley, which forms one whole with the die holder. Thus, the ends of the screwed rods, which do not allow easy access, have been moved to the other side of the driving pulley, which does allow easy access, and, furthermore, the possibilty is created of elegantly solving the centering problems during assembly and the problems of wedging during disassembly.
- For the purpose of solving the centering and disassembly problems, preferably on the side of the pulley that is away from the die, three clamping/centering units are arranged along the circumference in regularly spaced interrelationship, the free end of a screwed rod projecting outside the corresponding clamping/centering unit and being securable to it by means of a securing nut.
- The three clamping/centering units regularly spaced about the circumference and preferably adapted to be hydraulically controlled, make it possible for the die to be drawn uniformly against the conical centering edge of the combined driving pulley/ die holder throughout the circumference. By loading the clamping/centering unit in the opposite direction, the die, when drawn against the die holder, can be pushed clear uniformly, thus ensuring that the die comes off the conical centering edge when disassembled.
- One embodiment of the pelleter according to the invention will now be further explained, by way of example, with reference to the accompanying drawings, in which:
- Fig. 1 is a schematice view of a known pelleter;
- Fig. 2 shows the pelleter according to the invention with a combined pulley/die holder;
- Fig. 3 shows a manually operated clamping/centering unit to an enlarged scale;
- Fig. 4 shows a hydraulically controlled clamping/centering unit similar to the one shown in Fig. 3; and
- Fig. 5 shows a schematic view of the driving pulley / die holder viewed in the direction of arrow F of Fig. 2.
- The known pelleter shown in Fig. 1 comprises an
annular die 1 mounted on adie holder 5 which is bearing-mounted on a stationarymain shaft 2. Themain shaft 2 is supported by amachine frame 10. Mounted on thedie holder 5 is adriving pulley 9 adapted to be driven by an electric motor for rotating theannular die 1 about the stationarymain shaft 2 Arranged within thedie 1 are twopress rollers 3 mounted onpress roller shafts 8. At both ends thepress roller shafts 8 comprise eccentric bearing journals 4 which serve for adjusting thepress rollers 3 in the direction of thedie 1. The shaft journals disposed on the left-hand side of Fig. 1 are mounted in afront plate 12, while the shaft journals 4 disposed on the right-hand side are mounted in recesses provided in the end plate of the stationarymain shaft 2. In accordance with certain improvements we have invented, adjustment of thepress rollers 3 is preferably effected through an adjusting apparatus as described in the co-pending European patent application based on Netherlands patent application No.8901130. The die 1 comprises a conical edge which is drawn against theconical edge 6 of thedie holder 5 by means ofscrewed tie rods 7. As shown in Fig. 1 the ends of thetie rods 7 are not readily accessible because they are disposed in a space bounded on opposite sides by thedie holder 5 and thedriving pulley 9, respectively. - The material to be processed in the pelleter is supplied in the direction of the arrow X to the interior of the rotating,
annular die 1 driving thepress rollers 3. Thepress rollers 3 press the material through the channels provided in theannular die 1, after which the product leaves the pelleter in granular or pellet form in the direction designated by arrow Y - Fig. 2 shows the pelleter according to the invention, the driving
pulley 9 and thedie holder 5 being combined into a single member. Provided in the driving pulley/die holder recess 26 extending in circumferential direction, in which three clamping/centering units 11 can be arranged in regularly interspaced relationship along the circumference for drawing the die 1 against theconical edge 6 of the combined driving pulley/die holder. The construction of the clamping/centering unit 11 is shown in detail in Figs. 3-4. - Fig. 4 shows the pulley/
die holder main shaft 2 of the pelleter. The pulley/die holder has aconical centering edge 6 on its side proximal to thedie 1, and the die 1 has a corresponding conical centering edge. Provided in thedie 1 are a plurality ofjournal holes 13 arranged in regularly interrelationship along the circumference for receiving the end 14 of ascrewed rod 7. Thescrewed rod 7 extends through an opening in the pulley/die holder centering unit 11, theend face 20 of the clamping/centeringunit 11 forming a stop for thedie 1 when thesecuring nut 23 is tightened. The clamping/centering unit 11 comprises ahydraulic cylinder 12 which is mounted by means ofbolts 15 on the bottom of the groove-shaped recess 26 provided in the pulley /die holder hydraulic cylinder 12 comprises anoil chamber 17 to which oil can be supplied under pressure via anoil duct 18. Arranged round thescrewed rod 7 is apressure sleeve 16, which can be slid relatively to thescrewed rod 7. The left-hand end 20 of the pressure sleeve 16 projects outside the end face of the pulley/die holder die 1. The right-hand end of the pressure sleeve 16 projects from the end wall of thecylinder 12 and forms a stop for anut 21 to be mounted to thescrewed rod 7. Within thehydraulic cylinder 12 thepressure sleeve 16 has the form of apiston 25, which can be loaded in two directions. Between thepiston 25 and the wall of the pulley/die holder a packet of Bellevillewashers 19 are arranged which load thepiston 25 and hence thescrewed rod 7 in one direction, the centering edge of thedie 1 being drawn against theconical edge 6 of the pulley/die holder oil chamber 17 of thehydraulic cylinder 12 is bounded on the left side by thepiston 25 of thepressure sleeve 16 and on the right side by the end face of thehydraulic cylinder 12. For the sake of clarity oil seals, necessary in various places and accordingly provided in practice, have been omitted from the drawings. - Provided between the securing
nut 23 and the end face of thehydraulic cylinder 12 is apressure block 22. - As shown in Fig. 5 a total of three clamping/
centering units 11 are provided along the circumference of the pulley/die holder centering units 11 one or twolocking bolts 24 may further be provided for drawing thedie 1 against the pulley/die holder 9. - A die 1 is mounted on a pulley/die
holder 9 as follows: - In the
oil chambers 17 of the three clamping/centering units 11 oil is supplied under pressure via theoil duct 18, as a result of which thepiston 25 of thepressure sleeve 16 in Fig. 4 is pressed to the left, thespring packet 19 thus being compressed. Theend 20 of eachpressure sleeve 16, which end forms a stop, is thus pressed further from the pulley/die holder 9 than shown in Fig. 4. The hollow space within eachpressure sleeve 16 is empty, i.e. thetie rods 7 have not yet been mounted in thepressure sleeves 16. - The die 1, comprising three
tie rods 7 which are screwed into the tappedholes 13, is then moved against theprojecting stops 20, the threetie rods 7 projecting through thecorresponding pressure sleeves 16. The centering edge of the die remains clear of thecentering edge 6 of the pulley/die holder 9. Anut 21 is tightened on the end of thetie rod 7 that projects outside thepressure sleeve 16. - Then in all three clamping/
centering units 11 the oil pressure is removed from theoil chamber 17, thepressure sleeves 16 thus moving uniformly to the right (Fig. 4) under the influence of thespring packet 19, the centering edge of thedie 1 being drawn uniformly and in a centred manner against the conical centeringedge 6 of the pulley/die holder 9. It is clear thepiston 25 of thepressure sleeve 16 is to remain at a distance from the end wall of thehydraulic cylinder 12. In this position thetie rods 7 are kept under tensile stress by thespring packets 19. - Then a pressure block is mounted on the end of the
tie rods 7 and thesecuring nut 23 is tightened. The die 1 is then pressed against theconical centering edge 6 under the proper pressure. - Then the
locking bolts 24 provided between each pair of clamping/centering units 11 can be tightened without the centering of the die having to be checked. - The die 1 is disassembled in the following manner:
- unscrew and remove the locking bolts 24 (Fig. 5),
- remove thesecuring nuts 23 and thepressure blocks 22,
- pressurize simultaneously theoil chambers 17 of the clamping/centering units 11, the centering edge of thedie 1 thus being forced clear of the conical centeringedge 6 of the pulley/die holder 9,
- after unscrewing thenuts 21 remove the die with thetie rods 7 screwed into them horizontally using suitable hoisting apparatus. - The clamping/
centering unit 11 shown in Fig. 3 is different from the one in Fig. 4 only in that the hydraulic control is absent. Thespring packet 19 is mounted on the other side of thepiston 25 on.thepressure sleeve 16, and accordingly presses thepressure sleeve 16 to the left (Fig. 3), so that theend 20, forming a stop, extends outside the pulley/die holder 9 by the maximum distance. In this position thedie 1 is drawn against thestops 20 by tightening the nuts 21, the conical edge of thedie 1 still remaining clear of theconical edge 6 of the pulley/die holder 9. - The die is then drawn against the
edge 6 by alternately and turn-by-turn tightening thenuts 23 of the clamping/centeringunits 11 distributed along the circumference. - During disassembly the
spring packets 19 cause thedie 1 to be pressed clear.
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8901131A NL8901131A (en) | 1989-05-03 | 1989-05-03 | GRAIN PRESS FOR FEED AND THE LIKE. |
NL8901131 | 1989-05-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0396199A1 true EP0396199A1 (en) | 1990-11-07 |
EP0396199B1 EP0396199B1 (en) | 1994-08-31 |
Family
ID=19854602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900201107 Expired - Lifetime EP0396199B1 (en) | 1989-05-03 | 1990-05-02 | Pelleter for feed and the like |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0396199B1 (en) |
DE (1) | DE69011938T2 (en) |
DK (1) | DK0396199T3 (en) |
NL (1) | NL8901131A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0664961A1 (en) * | 1994-01-28 | 1995-08-02 | Ewos Aktiebolag | Process for the preparation of fish feed pellets, a fish pellet, and an apparatus for extruding fish feed |
ES2124654A1 (en) * | 1995-07-10 | 1999-02-01 | Mabrik S A | Improved granulating machine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2648296A (en) * | 1948-05-29 | 1953-08-11 | Sennet A Oliver | Pellet mill |
US3358328A (en) * | 1965-04-10 | 1967-12-19 | Buehler Ag Geb | Annular press device |
GB1578501A (en) * | 1977-02-11 | 1980-11-05 | Heesen T | Press |
EP0320747A2 (en) * | 1987-12-18 | 1989-06-21 | Bühler Ag | Pellet press |
-
1989
- 1989-05-03 NL NL8901131A patent/NL8901131A/en not_active Application Discontinuation
-
1990
- 1990-05-02 DE DE1990611938 patent/DE69011938T2/en not_active Expired - Fee Related
- 1990-05-02 DK DK90201107T patent/DK0396199T3/en active
- 1990-05-02 EP EP19900201107 patent/EP0396199B1/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2648296A (en) * | 1948-05-29 | 1953-08-11 | Sennet A Oliver | Pellet mill |
US3358328A (en) * | 1965-04-10 | 1967-12-19 | Buehler Ag Geb | Annular press device |
GB1578501A (en) * | 1977-02-11 | 1980-11-05 | Heesen T | Press |
EP0320747A2 (en) * | 1987-12-18 | 1989-06-21 | Bühler Ag | Pellet press |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0664961A1 (en) * | 1994-01-28 | 1995-08-02 | Ewos Aktiebolag | Process for the preparation of fish feed pellets, a fish pellet, and an apparatus for extruding fish feed |
ES2124654A1 (en) * | 1995-07-10 | 1999-02-01 | Mabrik S A | Improved granulating machine |
Also Published As
Publication number | Publication date |
---|---|
DE69011938T2 (en) | 1995-04-13 |
EP0396199B1 (en) | 1994-08-31 |
DE69011938D1 (en) | 1994-10-06 |
DK0396199T3 (en) | 1995-01-16 |
NL8901131A (en) | 1990-12-03 |
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