EP3235571B1 - Fixed knife assembly - Google Patents
Fixed knife assembly Download PDFInfo
- Publication number
- EP3235571B1 EP3235571B1 EP16166441.2A EP16166441A EP3235571B1 EP 3235571 B1 EP3235571 B1 EP 3235571B1 EP 16166441 A EP16166441 A EP 16166441A EP 3235571 B1 EP3235571 B1 EP 3235571B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- knife
- rotor
- knives
- fixed
- seat
- 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.)
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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
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
- B02C18/18—Knives; Mountings thereof
- B02C18/186—Axially elongated knives
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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
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
- B02C18/18—Knives; Mountings thereof
- B02C2018/188—Stationary counter-knives; Mountings thereof
Definitions
- the present invention concerns a knife assembly for a size reduction machine, such as a shredder or a granulator, which includes a rotor, wherein a knife is fixed on a seat and arranged for cooperation with a number of knives on the rotor, and the fixed knife is planar with a general plane of extension, wherein the fixed knife is held by at least two knife holders, which are arranged to adjust and position the knife in its plane of extension.
- a size reduction machine such as a shredder or a granulator
- the invention also concerns a size reduction machine, such as a shredder or a granulator.
- Size reduction machines such as shredders or granulators, are used in many fields for size reduction of different materials, for example mixed garbage or waste from building sites. They are also used for size reduction of selected, more uniform materials, such as wood or plastics, either to make the material less bulky or to prepare it for further processing.
- Shredders for plastics are often used for preparing large and/or heavy plastic parts for the production of plastic granules in a granulator mill, which requires smaller and more homogeneous parts in order to work as efficiently as possible and with as little down-time as possible. The resulting granules are often recycled in the production of new objects. Shredders work with a slower rotor speed than regular mills, and are more robust, in order to handle large or heavy pieces.
- a shredder is provided with a hopper, for receiving the parts which are to be cut into smaller pieces.
- a pusher is provided for pushing the parts towards the rotor, which may be provided with knives at one or two levels thereon.
- the knives on the rotor cooperate with fixed knives, and cut the plastics material between them. If the knives on the rotor are arranged at two different levels, the fixed knives are also arranged to cut the material at two different distances from the center of the rotor, which results in the fixed knives having sharp edges with a jagged appearance.
- the edge is alternatingly extending to be able to cooperate with the knives in the valleys of the rotor, and alternatingly recessed to be able to cooperate with the knives on the ridges of the rotor.
- the fixed knives In order to work properly, the fixed knives must be at a proper distance from the center of the rotor, so that the rotor may rotate freely, but at the same time its rotating knives should be close enough to the fixed knives to able to cut the material in the shredder.
- US5195685A discloses a granulator with fixed knives held by bolts. A set of abutments are arranged at the forward edges of the knives, which are pushed towards the abutments to attain a correct position.
- US3897016A discloses a typical construction according to the prior art, where fixed knives are provided with through-going fixing means and adjustment screws at their rear edges.
- US2830770A discloses a further option with fixed knives, through-going fixing means and adjustment screws.
- US2009/0045276A1 discloses a fixed knife which is connected to an adjusting slide.
- the slide can be moved by a spindle drive towards or away from a rotor, displacing simultaneously the fixed knife into a desired position.
- DE202005013719U1 discloses a complex adjustment mechanism for a non-reversible knife. Fixing screws keep the knife in its position.
- US5775608A discloses a knife with adjustment screws that push the knife into a desired position. Fixing screws keep the knife in its attained position.
- each knife holder is arranged to extend below the knife on the seat and through a back wall, with a transversal stud arranged to extend into a bore in the knife, and an adjustment sleeve is arranged on each knife holder, which sleeve is arranged for pushing the knife towards the rotor on tensioning of the adjustment sleeve, and for pulling the knife away from the rotor on loosening of the adjustment sleeve.
- the size reduction machine such as a shredder or a granulator, according to the invention includes the abovementioned knife assembly.
- Fig. 1 shows a shredder 1 according to the invention.
- the shredder 1 has a hopper 2 into which the plastic material, which is to be comminuted, is to be received.
- the shredder is also provided with a pusher 3, which pushes the material towards a rotor 4, which cuts the material into smaller pieces with the aid of knives on the rotor 4 and at least one stationary knife.
- a pusher 3 which pushes the material towards a rotor 4
- large lumps of plastics may be cut into uniformly sized chips.
- outlet 5 for evacuation of the uniformly sized chips of plastic material resulting from the cutting by the rotor 4.
- the outlet 5 may be connected to a conveyor, for transporting the plastic chips to a granulating mill and from there into the production of goods.
- Fig. 2 shows a section of the shredder according to Fig. 1 . From the section it is clear how the hopper 2 funnels down into a narrower, lower part 2a, wherein the pusher 3 operates in order to make sure that all the material reaches the rotor 4, and is eventually cut into smaller pieces. These smaller pieces are fed into the outlet 5, which is next to the rotor 4, as can be seen in Fig. 2 .
- Fig. 3 is a perspective view of the rotor 4.
- the rotor is provided with a screen 6, which is perforated.
- the screen is arranged on that side of the rotor 4 which faces away from the lower part 2a of the hopper 2.
- the uncovered side of the rotor 4 may be discerned in Fig. 3 .
- the rotor 4 is provided with annular ridges 7 and valleys 8.
- a number of knives 9 are arranged on the ridges 7 as well as in the valleys 8, which will be clearer in Fig. 4 , which is a plan view of the rotor 4.
- the arrangement of the knives 9 is known as such in the prior art, and serves to distribute the reaction forces from the cutting, so that the operation of the shredder 1 will run as smoothly and efficiently as possible. Also, the distribution allows the material, which is to be cut, to advance in small steps towards the rotor 4, each time the rotor 4 has rotated half a turn, as the knives 9 are alternatingly arranged at an outer level of the rotor 4, on the ridges 7, on the first half and at an inner level, in the valleys 8, on the second half.
- the knives 9 that are mounted in the valleys 8 are arranged at an inner level, i. e. at a level closer to the center, of the rotor 4, while the knives 9 at the ridges 7 are arranged at an outer level.
- the two levels of knives 9 will enable the pusher 3 to push the plastic material to be shredded forward towards the rotor 4 in small steps, where it will alternatingly be cut by the knives 9 at the outer level and the inner level, respectively.
- a number of fixed knives 10 are arranged, in order to cooperate with the knives 9 on the rotor 4, for cutting the material in the shredder 1.
- the sharp edges 11 of the fixed knives 10 have a shape which is complementary to the profile of the rotor 4 with its ridges 7 and valleys 8.
- the knives 10 are also provided with a number of bores 12 for fastening the knives 10 on a seat close to the rotor 4.
- each fixed knife 10 is fixed to the seat 13 by at least two bolts 14.
- knife holders 15 are arranged to extend directly below the knife 10, however slightly offset from the bolt 14.
- Fig. 6 shows the knives 10 mounted on the seat 13 from a different angle.
- the outer ends of the knife holders 15 are visible, as well as their respective means for adjustment, i. a. back lock nuts 17 in the preferred embodiment.
- the means for adjustment will be described in greater detail in connection with Figs 7-10 below.
- a ruler 16 On top of the fixed knives 10 is a ruler 16, which keeps debris and partly shredded material from accumulating in the bores 12 or at the back edges of the knives 10. The forward sharp edges 11 are free to cooperate with the knives 9 on the rotor 4.
- the knife holders 15 are manufactured separate from the seat, and they may be easily removed or exchanged during cleaning or maintenance of the shredder 1.
- the adjustment means include several nuts 17, 20 in order to fix the knife holder 15 in the seat 13, and keep it from longitudinal movements in both directions.
- the knife holders 15 are arranged below the knife 10, and engage with the oval bores 12a.
- the back lock nuts 17 are screwed onto the outer ends of the knife holders 15, and locked in their respective positions, in order to serve as a back limit for an adjustment sleeve 21 on each knife holder 15.
- the forward lock nuts 20 are in threaded engagement with the outside of the sleeves 21.
- each sleeve will push against a transversal surface 23 on the knife holder 15, thereby pushing the knife holder 15 and the knife 10 forward, i. e. towards the rotor 4, due to the engagement of the studs 18 (see fig 8 ) with the oval bores 12a.
- the adjustment sleeves 21 are loosened, i. e. rotated counterclockwise, the back end surface of the sleeve 21 will press against the back lock nuts 17, which are fixed on the outer ends of the knife holders 15.
- the knife holder 15 will be gradually pulled out and the knife will be pulled away from the rotor 4.
- the forward lock nuts 20 will be tensioned for fixing the knife holders 15 in position relative to the seat 13.
- the thickness of the knife 10 is sufficient for providing it with upper and lower sharp edges 11 at both its forward edge and its back edge. Hence there are four sharp edges on the knife 10.
- the shapes and positions of the bores 12, 12a are symmetrical, thus making the knife fully turnable, so that any one of the four sharp edges may be facing forward and upwards, thus cooperating with the knives 9 on the rotor 4.
- the sectional view shown in Fig. 8 is a section at the position of one of the knife holders 15.
- the knife holder 15 extends along the lower surface of the knife 10.
- the adjustment is determined, in its turn, by the position of the adjustment sleeve 21 at the outer end of the knife holder 15.
- Fig. 9 shows the knife holder 15 on its own.
- the transversal stud 18 is shown more clearly, as well as a flat portion 19, which is arranged to extend below the upper surface of the seat 13, with a clearance to the lower side of the knife 10.
- Fig. 10 is an exploded view of the knife holder 15, with all its parts clearly visible.
- the stud 18, for contact with the knife 10, is seen at the left in fig. 10 .
- the knife holder 15 also has its flat portion 19, as described above and an outer, partly threaded portion 22.
- the sleeve 21 is rotatably mounted onto the outer portion 22 of the knife holder 15, but it is not in a threaded engagement therewith, as only the outer end of the outer portion 22 is threaded.
- the sleeve 21 has a portion 21a with an outer thread and a hexagonal part 21b.
- the hexagonal part 21b is suitable for manipulation with a wrench or the like.
- the lock nut 20 fits on the sleeve portion 21a with the outer thread, and it will fix the position of the knife holder 15 in relation to the seat 13, once the sleeve 21 has attained its desired position on the outer part 22 of the knife holder 15.
- the back lock nuts 17 fit on the outer, threaded end of the outer part 22 of the knife holder 15. When they are locked in their position, e. g. by the use of a locking fluid, they serve as a limit of how far back the sleeve 21 may move on the outer part 22 of the knife holder 15..
- the invention has been described in relation to a shredder 1 with knives 9 arranged at two different levels, with fixed knives 10, which have contours that are complimentary to the arrangement of the knives 9 on the rotor 4.
- the outer contours of the fixed knives 10 may be entirely different.
- the arrangement of the knife holders 15 and the positioning of the fixed knives 10 would be the same as described above, regardless of the outer contours of the knives 10.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Pulverization Processes (AREA)
Description
- The present invention concerns a knife assembly for a size reduction machine, such as a shredder or a granulator, which includes a rotor, wherein a knife is fixed on a seat and arranged for cooperation with a number of knives on the rotor, and the fixed knife is planar with a general plane of extension, wherein the fixed knife is held by at least two knife holders, which are arranged to adjust and position the knife in its plane of extension.
- The invention also concerns a size reduction machine, such as a shredder or a granulator.
- Size reduction machines, such as shredders or granulators, are used in many fields for size reduction of different materials, for example mixed garbage or waste from building sites. They are also used for size reduction of selected, more uniform materials, such as wood or plastics, either to make the material less bulky or to prepare it for further processing.
- Shredders for plastics are often used for preparing large and/or heavy plastic parts for the production of plastic granules in a granulator mill, which requires smaller and more homogeneous parts in order to work as efficiently as possible and with as little down-time as possible. The resulting granules are often recycled in the production of new objects. Shredders work with a slower rotor speed than regular mills, and are more robust, in order to handle large or heavy pieces.
- In general, a shredder is provided with a hopper, for receiving the parts which are to be cut into smaller pieces. A pusher is provided for pushing the parts towards the rotor, which may be provided with knives at one or two levels thereon. The knives on the rotor cooperate with fixed knives, and cut the plastics material between them. If the knives on the rotor are arranged at two different levels, the fixed knives are also arranged to cut the material at two different distances from the center of the rotor, which results in the fixed knives having sharp edges with a jagged appearance. The edge is alternatingly extending to be able to cooperate with the knives in the valleys of the rotor, and alternatingly recessed to be able to cooperate with the knives on the ridges of the rotor.
In order to work properly, the fixed knives must be at a proper distance from the center of the rotor, so that the rotor may rotate freely, but at the same time its rotating knives should be close enough to the fixed knives to able to cut the material in the shredder. - As the fixed knives are worn with use and time, they will need to be replaced or removed for maintenance or cleaning. Often this is a complex operation, which calls for demounting of several parts of the shredder, which in turn results in long periods of down-time.
-
US5195685A discloses a granulator with fixed knives held by bolts. A set of abutments are arranged at the forward edges of the knives, which are pushed towards the abutments to attain a correct position.
US3897016A discloses a typical construction according to the prior art, where fixed knives are provided with through-going fixing means and adjustment screws at their rear edges.
US2830770A discloses a further option with fixed knives, through-going fixing means and adjustment screws. -
US2009/0045276A1 discloses a fixed knife which is connected to an adjusting slide. The slide can be moved by a spindle drive towards or away from a rotor, displacing simultaneously the fixed knife into a desired position.
DE202005013719U1 discloses a complex adjustment mechanism for a non-reversible knife. Fixing screws keep the knife in its position. -
US5775608A discloses a knife with adjustment screws that push the knife into a desired position. Fixing screws keep the knife in its attained position. - There is thus a need for a fixed knife which is easy to mount and demount, and which may be reliably adjusted into its working position.
- The objects forming the basis for the present invention are attained if the knife assembly mentioned in the introduction is characterized in that each knife holder is arranged to extend below the knife on the seat and through a back wall, with a transversal stud arranged to extend into a bore in the knife, and an adjustment sleeve is arranged on each knife holder, which sleeve is arranged for pushing the knife towards the rotor on tensioning of the adjustment sleeve, and for pulling the knife away from the rotor on loosening of the adjustment sleeve.
- The size reduction machine, such as a shredder or a granulator, according to the invention includes the abovementioned knife assembly.
- Further advantages will be attained if the present invention is given one or more features from the subclaims.
- The present invention will now be described in greater detail hereinbelow, with reference to the accompanying drawings. In the accompanying drawings:
- Fig. 1
- shows a perspective view of a shredder according to the invention;
- Fig. 2
- is a section through the shredder according to
Fig. 1 ; - Fig. 3
- shows a perspective view of a rotor included in the shredder according to the invention;
- Fig. 4
- is a plan view of the rotor according to
Fig. 3 ; - Fig. 5
- is a section through the rotor and fixed knives in the shredder;
- Fig. 6
- shows a perspective view of the fixed knives and a seat therefor;
- Fig. 7
- is a perspective view of a fixed knife and two knife holders;
- Fig. 8
- is a section through the knife and one of the knife holders;
- Fig. 9
- shows one of the knife holders in a perspective view; and
- Fig. 10
- is an exploded view of the knife holder.
-
Fig. 1 shows ashredder 1 according to the invention. As with most shredders according to the prior art, theshredder 1 has ahopper 2 into which the plastic material, which is to be comminuted, is to be received. The shredder is also provided with apusher 3, which pushes the material towards arotor 4, which cuts the material into smaller pieces with the aid of knives on therotor 4 and at least one stationary knife. Typically, large lumps of plastics may be cut into uniformly sized chips. - There is also an
outlet 5, for evacuation of the uniformly sized chips of plastic material resulting from the cutting by therotor 4. Theoutlet 5 may be connected to a conveyor, for transporting the plastic chips to a granulating mill and from there into the production of goods. -
Fig. 2 shows a section of the shredder according toFig. 1 . From the section it is clear how thehopper 2 funnels down into a narrower,lower part 2a, wherein thepusher 3 operates in order to make sure that all the material reaches therotor 4, and is eventually cut into smaller pieces. These smaller pieces are fed into theoutlet 5, which is next to therotor 4, as can be seen inFig. 2 . -
Fig. 3 is a perspective view of therotor 4. The rotor is provided with a screen 6, which is perforated. The screen is arranged on that side of therotor 4 which faces away from thelower part 2a of thehopper 2. When the plastic chips, resulting from the cutting operation, are small enough to pass through the holes in the screen 6, they will proceed to theoutlet 5, as described above. - The uncovered side of the
rotor 4 may be discerned inFig. 3 . Therotor 4 is provided withannular ridges 7 andvalleys 8. A number ofknives 9 are arranged on theridges 7 as well as in thevalleys 8, which will be clearer inFig. 4 , which is a plan view of therotor 4. - The arrangement of the
knives 9 is known as such in the prior art, and serves to distribute the reaction forces from the cutting, so that the operation of theshredder 1 will run as smoothly and efficiently as possible. Also, the distribution allows the material, which is to be cut, to advance in small steps towards therotor 4, each time therotor 4 has rotated half a turn, as theknives 9 are alternatingly arranged at an outer level of therotor 4, on theridges 7, on the first half and at an inner level, in thevalleys 8, on the second half. - The
knives 9 that are mounted in thevalleys 8 are arranged at an inner level, i. e. at a level closer to the center, of therotor 4, while theknives 9 at theridges 7 are arranged at an outer level. The two levels ofknives 9 will enable thepusher 3 to push the plastic material to be shredded forward towards therotor 4 in small steps, where it will alternatingly be cut by theknives 9 at the outer level and the inner level, respectively. - Next to the
rotor 4, a number of fixedknives 10 are arranged, in order to cooperate with theknives 9 on therotor 4, for cutting the material in theshredder 1. The sharp edges 11 of the fixedknives 10 have a shape which is complementary to the profile of therotor 4 with itsridges 7 andvalleys 8. Theknives 10 are also provided with a number ofbores 12 for fastening theknives 10 on a seat close to therotor 4. - In
Fig. 5 therotor 4, theseat 13 and the fixedknife 10 are visible in a sectional view. Abolt 14 extends transversally to the plane of extension of the fixedknife 10, through theseat 13 and into a threadedbore 12 in theknife 10, thereby fixing theknife 10 on the seat, both in the plane of extension of theknife 10 and in the direction of thebolt 14. In a preferred embodiment, each fixedknife 10 is fixed to theseat 13 by at least twobolts 14. - In order to adjust and position the
knife 10 in its plane of extension,knife holders 15 are arranged to extend directly below theknife 10, however slightly offset from thebolt 14. -
Fig. 6 shows theknives 10 mounted on theseat 13 from a different angle. The outer ends of theknife holders 15 are visible, as well as their respective means for adjustment, i. a. back lock nuts 17 in the preferred embodiment. The means for adjustment will be described in greater detail in connection withFigs 7-10 below. As the means for adjustment are tightened or loosened, the positions of theknife holders 15, and of theknives 10, are adjusted. On top of the fixedknives 10 is aruler 16, which keeps debris and partly shredded material from accumulating in thebores 12 or at the back edges of theknives 10. The forwardsharp edges 11 are free to cooperate with theknives 9 on therotor 4. - The
knife holders 15 are manufactured separate from the seat, and they may be easily removed or exchanged during cleaning or maintenance of theshredder 1. The adjustment means includeseveral nuts knife holder 15 in theseat 13, and keep it from longitudinal movements in both directions. - One of the
knives 10 is shown inFig. 7 . Theknife holders 15 are arranged below theknife 10, and engage with the oval bores 12a. Theback lock nuts 17 are screwed onto the outer ends of theknife holders 15, and locked in their respective positions, in order to serve as a back limit for anadjustment sleeve 21 on eachknife holder 15. Theforward lock nuts 20 are in threaded engagement with the outside of thesleeves 21. - As the
adjustment sleeves 21 are tensioned, i. e. rotated clockwise, the inner end of each sleeve will push against atransversal surface 23 on theknife holder 15, thereby pushing theknife holder 15 and theknife 10 forward, i. e. towards therotor 4, due to the engagement of the studs 18 (seefig 8 ) with the oval bores 12a. - If the
adjustment sleeves 21 are loosened, i. e. rotated counterclockwise, the back end surface of thesleeve 21 will press against theback lock nuts 17, which are fixed on the outer ends of theknife holders 15. Theknife holder 15 will be gradually pulled out and the knife will be pulled away from therotor 4. Theforward lock nuts 20 will be tensioned for fixing theknife holders 15 in position relative to theseat 13. - The thickness of the
knife 10 is sufficient for providing it with upper and lowersharp edges 11 at both its forward edge and its back edge. Hence there are four sharp edges on theknife 10. The shapes and positions of thebores knives 9 on therotor 4. - The sectional view shown in
Fig. 8 is a section at the position of one of theknife holders 15. Theknife holder 15 extends along the lower surface of theknife 10. At one end there is atransversal stud 18, which extends into theoval bore 12a in theknife 10, keeping it in a position which is determined by the length of theknife holder 15 and the adjustment of theknife holder 15 in relation to theseat 13. The adjustment is determined, in its turn, by the position of theadjustment sleeve 21 at the outer end of theknife holder 15. -
Fig. 9 shows theknife holder 15 on its own. In this view, thetransversal stud 18 is shown more clearly, as well as aflat portion 19, which is arranged to extend below the upper surface of theseat 13, with a clearance to the lower side of theknife 10. -
Fig. 10 is an exploded view of theknife holder 15, with all its parts clearly visible. Thestud 18, for contact with theknife 10, is seen at the left infig. 10 . Theknife holder 15 also has itsflat portion 19, as described above and an outer, partly threadedportion 22. Thesleeve 21 is rotatably mounted onto theouter portion 22 of theknife holder 15, but it is not in a threaded engagement therewith, as only the outer end of theouter portion 22 is threaded. Thesleeve 21 has a portion 21a with an outer thread and ahexagonal part 21b. Thehexagonal part 21b is suitable for manipulation with a wrench or the like. - The
lock nut 20 fits on the sleeve portion 21a with the outer thread, and it will fix the position of theknife holder 15 in relation to theseat 13, once thesleeve 21 has attained its desired position on theouter part 22 of theknife holder 15. - The
back lock nuts 17 fit on the outer, threaded end of theouter part 22 of theknife holder 15. When they are locked in their position, e. g. by the use of a locking fluid, they serve as a limit of how far back thesleeve 21 may move on theouter part 22 of theknife holder 15.. - The invention has been described in relation to a
shredder 1 withknives 9 arranged at two different levels, with fixedknives 10, which have contours that are complimentary to the arrangement of theknives 9 on therotor 4. With a different rotor, whereon the knives are arranged in a different manner, the outer contours of the fixedknives 10 may be entirely different. However, the arrangement of theknife holders 15 and the positioning of the fixedknives 10 would be the same as described above, regardless of the outer contours of theknives 10. Also, there would still be severalsharp edges 11 on theknives 10, to be used by turning theknives 10 in different directions. - The invention may be further modified within the scope of the claims.
Claims (4)
- Knife assembly for a size reduction machine, such as a shredder or a granulator (1), which includes a rotor (4), wherein a knife (10) is fixed on a seat (13) and arranged for cooperation with a number of knives (9) on the rotor (4), and the fixed knife (10) is planar with a general plane of extension, wherein the fixed knife (10) is held by at least two knife holders (15), which are arranged to adjust and position the knife (10) in its plane of extension, characterized in that each knife holder (15) is arranged to extend below the knife (10) on the seat (13) and through a back wall, with a transversal stud (18) arranged to extend into a bore (12a) in the knife (10), and an adjustment sleeve (21) is arranged on each knife holder (15), which sleeve (21) is arranged for pushing the knife (15) towards the rotor (4) on tensioning of the adjustment sleeve (21), and for pulling the knife (15) away from the rotor (4) on loosening of the adjustment sleeve (15).
- Knife assembly according to claim 1, characterized in that the fixed knife (10) is fixable on the seat (13) both in its plane of extension and in a direction transversal to its plane of extension by at least two bolts (14) extending through the seat (13) and cooperating with respective bores (12) in the knife (10).
- Knife assembly according to claim 1 or claim 2, characterized in that the knife (10) has at least one symmetry plane, making the knife (10) reversible.
- Size reduction machine, such as a shredder or a granulator (1) including the knife assembly according to any of claims 1 to 3.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL16166441T PL3235571T3 (en) | 2016-04-21 | 2016-04-21 | Fixed knife assembly |
EP16166441.2A EP3235571B1 (en) | 2016-04-21 | 2016-04-21 | Fixed knife assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16166441.2A EP3235571B1 (en) | 2016-04-21 | 2016-04-21 | Fixed knife assembly |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3235571A1 EP3235571A1 (en) | 2017-10-25 |
EP3235571B1 true EP3235571B1 (en) | 2018-11-28 |
Family
ID=55802309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16166441.2A Active EP3235571B1 (en) | 2016-04-21 | 2016-04-21 | Fixed knife assembly |
Country Status (2)
Country | Link |
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EP (1) | EP3235571B1 (en) |
PL (1) | PL3235571T3 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112156867B (en) * | 2020-09-09 | 2021-12-24 | 山东交通学院 | Prevent stifled distributor with secondary cuts off and smashes function |
EP4316664A1 (en) * | 2022-08-05 | 2024-02-07 | Rapid Granulator AB | Granulator mill |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2830770A (en) * | 1954-03-12 | 1958-04-15 | Luca Michael F De | Granulating machine |
US3897016A (en) * | 1974-03-27 | 1975-07-29 | Cumberland Eng Co | Granulator with noise abatement and safety means |
US5195685A (en) * | 1991-10-07 | 1993-03-23 | Mediclean Technology, Inc. | Granulator for waste material |
US5209278A (en) * | 1992-02-27 | 1993-05-11 | Commerical Knife,Inc. | Drum chipper with knife and knife holder |
US5775608A (en) * | 1997-04-07 | 1998-07-07 | Dumaine; Thomas J. | Reversible granulator |
DE202005013719U1 (en) * | 2005-08-31 | 2006-03-02 | Knorr, Volker | Stator adjuster for stator cutter in direction of rotor by tightening of variable pitch propeller has pressure screw and tension screw connected by the lever and slit nuts |
DE202007011572U1 (en) * | 2007-08-17 | 2007-10-18 | Becker, Udo | Grobstoffzerkleinerer |
-
2016
- 2016-04-21 EP EP16166441.2A patent/EP3235571B1/en active Active
- 2016-04-21 PL PL16166441T patent/PL3235571T3/en unknown
Non-Patent Citations (1)
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Also Published As
Publication number | Publication date |
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PL3235571T3 (en) | 2019-05-31 |
EP3235571A1 (en) | 2017-10-25 |
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