US20140138865A1 - Method of Controlling a Pellet Mill - Google Patents

Method of Controlling a Pellet Mill Download PDF

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Publication number
US20140138865A1
US20140138865A1 US14/114,691 US201214114691A US2014138865A1 US 20140138865 A1 US20140138865 A1 US 20140138865A1 US 201214114691 A US201214114691 A US 201214114691A US 2014138865 A1 US2014138865 A1 US 2014138865A1
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United States
Prior art keywords
rollers
pellet mill
controlling
die
accordance
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.)
Abandoned
Application number
US14/114,691
Inventor
Jesper Blok
Tomas Kiré Hørdum
Steen G. Lassen
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Andritz AG
Original Assignee
Andritz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from EP11164246A external-priority patent/EP2517869A1/en
Priority claimed from EP11164251A external-priority patent/EP2517870A1/en
Priority claimed from EP11164249A external-priority patent/EP2517868A1/en
Application filed by Andritz AG filed Critical Andritz AG
Assigned to ANDRITZ AG reassignment ANDRITZ AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HORDUM, TOMAS KIRE, BLOK, JESPER, LASSEN, STEEN G.
Publication of US20140138865A1 publication Critical patent/US20140138865A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/04—Particle-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/08—Making granules by agglomerating smaller particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/10—Making granules by moulding the material, i.e. treating it in the molten state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/006—Pressing and sintering powders, granules or fibres
    • 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
    • B30B11/005—Control arrangements
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
    • B30B15/281—Arrangements for preventing distortion of, or damage to, presses or parts thereof overload limiting devices
    • B30B15/282—Arrangements for preventing distortion of, or damage to, presses or parts thereof overload limiting devices using a breakage element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
    • B29B7/421—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with screw and additionally other mixing elements on the same shaft, e.g. paddles, discs, bearings, rotor blades of the Banbury type

Definitions

  • the present invention pertains to a method of controlling a pellet mill, said pellet mill comprising a number of rollers mounted inside a cylindrical die for pressing material to be pelletized through perforations provided in said cylindrical die
  • the pellet mill further comprises one or more adjustment mechanisms for adjusting the distance between the rollers and the die, and a drive mechanism for rotationally driving the die and rollers.
  • the rollers are driven by the friction between the die, the material to be pelletized and the rollers and the drive mechanism thus merely drives the die.
  • the controlling method comprising the steps of controlling the position of the rollers by means of an adjustment mechanism to a predetermined distance between the roller and the die, and limiting the available forces for the adjustment mechanism, whereby the rollers will give way if larger forces are necessary for maintaining the predetermined distance.
  • this is taken as an indication of an overload of the pellet mill and load-reducing countermeasures are taken, e g. in the form of a reduced supply of material.
  • the position of the rollers may be controlled by means of an adjustment mechanism, e.g in the form of hydraulic piston cylinder units and the position is measured, typically by the physical position of said hydraulic piston cylinder unit
  • an adjustment mechanism e.g in the form of hydraulic piston cylinder units and the position is measured, typically by the physical position of said hydraulic piston cylinder unit
  • the position of the rollers is controlled to a predetermined distance between roller and die and the forces available for the adjustment mechanism is limited, in the case of a hydraulic system, by limiting the hydraulic pressure available, whereby the rollers will give way if larger forces are necessary for maintaining the position of the rollers and accordingly, such yield of a roller leading to non-maintenance of the predetermined distance between roller and die, can be taken as an indication of an overload of the pellet mill.
  • this yield of a roller will allow part of the material to be pelletized to be transported to the next following roller, where it may be pressed through the die.
  • the limitation of the available forces for the adjustment mechanism also limits the possible unbalance between the rollers and thus the strain on the structural parts of the pellet mill.
  • the forces available for the adjustment are limited to a level equal to the level necessary for keeping the position under normal conditions plus a predefined value, preferably e.g 10% thereof
  • the suitable countermeasures for reducing the load on the pellet mill may comprise one or more of the following.
  • the measurements of the positions of the individual rollers are used in a closed loop control for the positions of the rollers It is furthermore preferred that an individual position control is performed and in connection with the slip measurement for the individual roller, individual initiation of countermeasures is performed for each of the rollers
  • a further measurement of the rotational speed of each of the rollers can be performed and in case of detection of a non-rotating roller or a roller rolling at a reduced peripheral speed compared to the peripheral speed of the die, this can be taken as an indication of slip between the roller and the die, and suitable load-reducing countermeasures can be taken in such a situation
  • FIG. 1 schematically shows a pellet mill provided with means for performing measurements and for controlling the pellet mill in accordance with the method in according with the present invention
  • FIG. 2 schematically shows drive means for the pellet mill die and for supply of material to the pellet mill.
  • the pellet mill shown in FIG. 1 is provided with suitable means for measuring relevant parameters for providing a control on the pellet mill.
  • the figure shows means 8 , 9 , 10 for measurement of the individual positions x,y,z of the rollers of the pellet mill 11 , 12 , 13 , 14 and for measuring the rotational speed w 1 , w 2 , w 3 , w 4 of the individual rollers and the die.
  • Various possibilities for performing the position measurements could be simple linear position detectors, rotational position detectors or, in case of hydraulic drive for controlling the position of the rollers, hydraulic fluid volume measurement, measuring the amount of hydraulic fluid delivered to the hydraulic cylinders for controlling the position of the rollers.
  • the measurement of the rotational speed of rollers and die, respectively, may be performed by means of optical sensors, inductive sensors, etc.
  • the controller shown in FIG. 1 is provided for converting the above-mentioned measurements to commands a,b,c for controlling the valves 17 , 18 , 19 controlling the positions x,y,z of the adjustment mechanisms for the roller position, e g. in the form of double-acting hydraulic cylinder-piston units 5 , 6 , 7 .
  • Such adjustment mechanisms may furthermore comprise the provision of eccentrically supported axles for the rollers, said eccentrically supported axles being rotated by means of the adjustment mechanism connected thereto
  • the controller is able to control the drive motor M 4 for the die, the individual material supply motors M 1 , M 2 , M 3 supplying material for the individual rollers, if present, and possibly, again if present, drive motors for the individual rollers (not shown)
  • FIG. 1 it is schematically indicated that a hydraulic supply 16 is provided.
  • the hydraulic supply 16 is preferably provided with a maximum pressure restriction, whereby the maximum force available for keeping the rollers in a desired position has been limited
  • Corresponding limitation of the maximum force can naturally also be provided in connection with other types of adjustment drive mechanisms, such as electrical drive mechanisms.
  • FIG. 2 shows the motor M 4 for driving the die 1 and a number of motors M 1 , M 2 , M 3 for supply of material to the pellet mill
  • individual motors for supply of material to individual rollers of the pellet mill are provided, in order to be able to provide individual control of supply of material and individual initiation of countermeasures in accordance with the present invention
  • the motor control for driving the die may include a frequency converter for adjustable rotational speed of the die. This provides the possibility of adjusting the set point for the rotational speed of the die, in order to offer the possibility of maximizing the output of the pellet mill.

Abstract

It is the object of the present invention to provide a method of controlling a pellet mill, said pellet mill comprising—a number of rollers (2,3,4),—a cylindrical die (1) provided with perforations, said rollers (2,3,4) being mounted inside said cylindrical die (1) for pressing material to be pelletized through said perforations,—an adjustment mechanism (5,6,7) for adjusting the distance between the rollers (2,3,4) and the die, (1)—a drive mechanism (M4) for rotationally driving said die (1) and said rollers (2,3,4), said method of controlling comprising the steps of—providing a measurement (8,9,10,11,12,13,14) of a parameter (x,y,z, W1,W2,W3,W4), said parameter indicating if an overload of the pellet mill is arising, and—in case of such indication being detected, reducing the load on the pellet mill by suitable counter-measures.

Description

    TECHNICAL FIELD
  • The present invention pertains to a method of controlling a pellet mill, said pellet mill comprising a number of rollers mounted inside a cylindrical die for pressing material to be pelletized through perforations provided in said cylindrical die The pellet mill further comprises one or more adjustment mechanisms for adjusting the distance between the rollers and the die, and a drive mechanism for rotationally driving the die and rollers. Typically, the rollers are driven by the friction between the die, the material to be pelletized and the rollers and the drive mechanism thus merely drives the die.
    • BACKGROUND OF THE INVENTION
  • In order to maximize the output of such a pellet mill, it is normally driven close to maximum load and thus just minor fluctuations may lead to overload of the pellet mill Typically, such overload is not detected until the safety mechanism, e g. in the form of a shear pin, breaks, which leads to disengagement of the roller support, whereby the rollers and roller support may rotate with the die, when blocking of the pellet mill has been encountered. Subsequently, it will be necessary to disassemble the pellet mill in order to empty the space between the rollers and the die and insert a new shear pin for the safety mechanism before restarting the pellet mill
  • From EP 472 016 A2 it is known to provide a measurement of the rotational speed of the die and the rollers and to compare the peripheral speed of these, in order to detect a possible slip, which is taken as an indication of malfunction of the pellet mill. Suitable countermeasures can then be taken, e g. in the form of reduced supply of material or change of the composition of the material supplied in order to resume proper function of the pellet mill.
    • SUMMARY OF THE INVENTION
  • It is the object of the present invention to provide an improved method of controlling a pellet mill of the above kind, whereby there can be provided an early warning of an overload of the pellet mill and initiation of suitable corresponding countermeasures for avoiding total stop of the pellet mill in such situations.
  • According to the present invention, the above-mentioned and further objects are obtained by the controlling method comprising the steps of controlling the position of the rollers by means of an adjustment mechanism to a predetermined distance between the roller and the die, and limiting the available forces for the adjustment mechanism, whereby the rollers will give way if larger forces are necessary for maintaining the predetermined distance. In case of an increase of the distance between the rollers and the die, this is taken as an indication of an overload of the pellet mill and load-reducing countermeasures are taken, e g. in the form of a reduced supply of material.
  • The position of the rollers may be controlled by means of an adjustment mechanism, e.g in the form of hydraulic piston cylinder units and the position is measured, typically by the physical position of said hydraulic piston cylinder unit In accordance with the present invention, the position of the rollers is controlled to a predetermined distance between roller and die and the forces available for the adjustment mechanism is limited, in the case of a hydraulic system, by limiting the hydraulic pressure available, whereby the rollers will give way if larger forces are necessary for maintaining the position of the rollers and accordingly, such yield of a roller leading to non-maintenance of the predetermined distance between roller and die, can be taken as an indication of an overload of the pellet mill.
  • Furthermore, this yield of a roller will allow part of the material to be pelletized to be transported to the next following roller, where it may be pressed through the die. The limitation of the available forces for the adjustment mechanism also limits the possible unbalance between the rollers and thus the strain on the structural parts of the pellet mill.
  • In this connection it may be advantageous to allow a predetermined increase in the distance before initiating the load-reducing countermeasures. This will allow an automatic load-distribution between the rollers which may lead to overcoming the tendency to overload of a single roller and subsequent resumption of normal processing of the material
  • In a preferred embodiment, the forces available for the adjustment are limited to a level equal to the level necessary for keeping the position under normal conditions plus a predefined value, preferably e.g 10% thereof
  • The suitable countermeasures for reducing the load on the pellet mill may comprise one or more of the following.
  • i) reducing the supply of material to the pellet mill and/or to a specific roller, for which an indication of overload has been registered.
  • ii) increasing the distance between the die and the rollers or, if overload is related to a specific roller, between the die and a specific roller, for which an overload has been indicated
  • iii) allowing a short overload by short term increasing the hydraulic pressure for one or more rollers
  • iv) a combination of the above-mentioned
  • In a preferred embodiment, the measurements of the positions of the individual rollers are used in a closed loop control for the positions of the rollers It is furthermore preferred that an individual position control is performed and in connection with the slip measurement for the individual roller, individual initiation of countermeasures is performed for each of the rollers
  • In an advantageous supplementary embodiment of the method, a further measurement of the rotational speed of each of the rollers can be performed and in case of detection of a non-rotating roller or a roller rolling at a reduced peripheral speed compared to the peripheral speed of the die, this can be taken as an indication of slip between the roller and the die, and suitable load-reducing countermeasures can be taken in such a situation
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • In the following detailed part of the present description, the invention will be explained in more detail with reference to the exemplary embodiments of methods of controlling a pellet mill according to the invention in connection with a pellet mill as shown in the drawings, in which
  • FIG. 1 schematically shows a pellet mill provided with means for performing measurements and for controlling the pellet mill in accordance with the method in according with the present invention, and
  • FIG. 2 schematically shows drive means for the pellet mill die and for supply of material to the pellet mill.
    •
  • The pellet mill shown in FIG. 1 is provided with suitable means for measuring relevant parameters for providing a control on the pellet mill. Thus, the figure shows means 8,9,10 for measurement of the individual positions x,y,z of the rollers of the pellet mill 11,12,13,14 and for measuring the rotational speed w1, w2, w3, w4 of the individual rollers and the die.
  • Various possibilities for performing the position measurements could be simple linear position detectors, rotational position detectors or, in case of hydraulic drive for controlling the position of the rollers, hydraulic fluid volume measurement, measuring the amount of hydraulic fluid delivered to the hydraulic cylinders for controlling the position of the rollers.
  • The measurement of the rotational speed of rollers and die, respectively, may be performed by means of optical sensors, inductive sensors, etc.
  • The controller shown in FIG. 1 is provided for converting the above-mentioned measurements to commands a,b,c for controlling the valves 17,18,19 controlling the positions x,y,z of the adjustment mechanisms for the roller position, e g. in the form of double-acting hydraulic cylinder- piston units 5,6,7. Such adjustment mechanisms may furthermore comprise the provision of eccentrically supported axles for the rollers, said eccentrically supported axles being rotated by means of the adjustment mechanism connected thereto Furthermore, the controller is able to control the drive motor M4 for the die, the individual material supply motors M1, M2, M3 supplying material for the individual rollers, if present, and possibly, again if present, drive motors for the individual rollers (not shown)
  • In FIG. 1 it is schematically indicated that a hydraulic supply 16 is provided. The hydraulic supply 16 is preferably provided with a maximum pressure restriction, whereby the maximum force available for keeping the rollers in a desired position has been limited Corresponding limitation of the maximum force can naturally also be provided in connection with other types of adjustment drive mechanisms, such as electrical drive mechanisms.
  • By the provision of this maximum available force, a position measurement of the rollers can indicate an overload of the individual roller by the adjustment system not being able to keep the desired position
  • FIG. 2 shows the motor M4 for driving the die 1 and a number of motors M1, M2, M3 for supply of material to the pellet mill Preferably, individual motors for supply of material to individual rollers of the pellet mill are provided, in order to be able to provide individual control of supply of material and individual initiation of countermeasures in accordance with the present invention
  • The motor control for driving the die may include a frequency converter for adjustable rotational speed of the die. This provides the possibility of adjusting the set point for the rotational speed of the die, in order to offer the possibility of maximizing the output of the pellet mill.
  • In connection with the above drawings, some preferred features of the present invention have been illustrated, however, it should be emphasized that not all of the above features need to be employed in order to implement the present invention, which is solely to be restricted by the appended claims Thus, it is possible to implement the present invention with only one or preferably at least two rollers and also more than three rollers as illustrated may be used. Furthermore, the different measurements may be reduced to fewer measurements than indicated in the appended figures. Also the individual supply of material may be omitted and a common supply for the pellet mill may be used Preferably this supply can be controlled in a suitable manner in accordance with the present invention.

Claims (10)

1. Method of controlling a pellet mill, said pellet mill comprising
a number of rollers,
a cylindrical die provided with perforations, said rollers being mounted inside said cylindrical die for pressing material to be pelletized through said perforations,
an adjustment mechanism for adjusting the distance between the rollers and the die,
a drive mechanism for rotationally driving said die and said rollers,
said method of controlling comprising the steps of
controlling the position of the rollers by means of the adjustment mechanism to a predetermined distance between the roller and die,
limiting the available forces for said adjustment mechanism, whereby the rollers will give way if larger forces are necessary for maintaining the position of the rollers,
providing a detection of a possible increase of the distance between the rollers and the die, and if such increase of said distance is above a predetermined level, this is taken as an indication of an overload of the pellet mill, and load-reducing countermeasures are taken.
2. Method of controlling a pellet mill in accordance with claim 1, further comprising performing measurements of the positions of the rollers and setting a limit for the measured values corresponding to the predetermined level of the distance between the rollers and the die, and using said measurements for detecting and indicating an overload of the pellet mill.
3. Method of controlling a pellet mill in accordance with claim 1, wherein the limitation of the available forces for the adjustment mechanism is performed by using a hydraulic piston cylinder adjustment mechanism for the rollers and limiting the available hydraulic pressure for controlling the position of the rollers.
4. Method of controlling a pellet mill in accordance with claim 1, wherein the limited available forces for said adjustment mechanism is set to a level equal to the level necessary for keeping the position under normal conditions plus a predefined value, preferably e.g. 10% thereof.
5. Method of controlling a pellet mill in accordance with claim 1, wherein the load-reducing countermeasures comprises
reducing the supply of material to the pellet mill and/or to a specific roller, for which an indication of overload has been registered.
6. Method of controlling a pellet mill in accordance with claim 1, wherein the suitable countermeasures comprises increasing the distance between the rollers and the die and/or increasing the distance between a specific roller and the die, the specific roller being the one for which an overload has been indicated.
7. Method of controlling a pellet mill in accordance with claim 1, wherein measurements of the position of the individual rollers are used in closed loop control of the positions of the rollers.
8. Method of controlling a pellet mill in accordance with claim 1, wherein an individual position control is performed for the individual rollers and individual initiation of countermeasures are performed for each roller.
9. Method of controlling a pellet mill in accordance with claim 1, said method further comprising measuring the rotational speed of each roller, respectively, and
detecting if a roller is non-rotating and taking this as an indication of an overload of the pellet mill, resulting in load-reducing countermeasures being taken.
10. Method of controlling a pellet mill in accordance with claim 1, further comprising performing measurement of the rotational speed of the die and the rollers, respectively,
calculating the slip between the rollers and the die,
and when said calculated slip for a specific roller is larger than a predetermined limit, this is taken as an indication of a malfunction of the pellet mill resulting in load-reducing countermeasures being taken.
US14/114,691 2011-04-29 2012-04-27 Method of Controlling a Pellet Mill Abandoned US20140138865A1 (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
EP11164246A EP2517869A1 (en) 2011-04-29 2011-04-29 Pellet mill
EP11164251A EP2517870A1 (en) 2011-04-29 2011-04-29 Feed system for a pellet mill
EP11164246.8 2011-04-29
EP11164249A EP2517868A1 (en) 2011-04-29 2011-04-29 Method of controlling a pellet mill
EP11164251.8 2011-04-29
EP11164249.2 2011-04-29
PCT/EP2012/057726 WO2012146699A1 (en) 2011-04-29 2012-04-27 Method of controlling a pellet mill

Publications (1)

Publication Number Publication Date
US20140138865A1 true US20140138865A1 (en) 2014-05-22

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US14/114,691 Abandoned US20140138865A1 (en) 2011-04-29 2012-04-27 Method of Controlling a Pellet Mill
US14/114,722 Active 2034-03-27 US9616605B2 (en) 2011-04-29 2012-04-27 Pellet mill with an improved feed system and a method of forming pelleted material

Family Applications After (1)

Application Number Title Priority Date Filing Date
US14/114,722 Active 2034-03-27 US9616605B2 (en) 2011-04-29 2012-04-27 Pellet mill with an improved feed system and a method of forming pelleted material

Country Status (8)

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US (2) US20140138865A1 (en)
EP (3) EP2701899B1 (en)
CN (3) CN103717385B (en)
BR (2) BR112013027404A2 (en)
CA (3) CA2834181C (en)
PT (1) PT2701899E (en)
RU (3) RU2557858C2 (en)
WO (3) WO2012146700A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9682524B2 (en) 2013-02-26 2017-06-20 Bp Recycling Systems Gmbh Pelletizing or granulating apparatus
EP3501811A1 (en) * 2017-12-21 2019-06-26 Fette Compacting GmbH Method for regulating the rotor speed of a rotor of a rotary tablet press and rotary tablet press
US11717987B2 (en) * 2016-05-24 2023-08-08 Websphere It & Soft Solutions Srl Compactor

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107599218A (en) * 2017-09-28 2018-01-19 江苏昊晟塑业科技有限公司 A kind of extruding and pelletizing plant for the production of polyethylene foam particle
AT521707B1 (en) * 2018-10-02 2023-04-15 Ludwig Schaider Device for making pellets
CN109966149B (en) * 2019-04-17 2021-11-16 重庆医药高等专科学校 Spherical tank type intelligent pill making device
US11420242B2 (en) * 2019-08-16 2022-08-23 Stolle Machinery Company, Llc Reformer assembly
EP4180218A1 (en) 2021-11-12 2023-05-17 Maschinenfabrik Bermatingen GmbH & Co. KG Method and device for producing pellets

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB989603A (en) * 1963-09-30 1965-04-22 Muhlenbau Dresden Veb Pressure-application device
US4498856A (en) * 1982-11-05 1985-02-12 Ru-Korrel (Propietary) Limited Compacting mill
FR2591438A1 (en) * 1985-12-12 1987-06-19 Bellefroid Charly Vincent Improved device for adjusting the distance between the rollers and the pressurised annular extrusion dies of an extruding machine for food granules
EP0231764A2 (en) * 1986-01-24 1987-08-12 Bühler Ag Pellet press
US4838779A (en) * 1986-05-20 1989-06-13 Van Aarsen Machinefabriek, B.V. Apparatus for a pelletizer having hydraulically adjustable pressing rolls
DE3813081A1 (en) * 1988-04-19 1989-11-02 Kahl Amandus Maschf Pan grinder press with a hydraulic device
US5251545A (en) * 1990-08-20 1993-10-12 Buhler Ag Method for slip regulation of a pellet mill and apparatus for carrying out the process
US20060082026A1 (en) * 2002-07-19 2006-04-20 Zhanbin Che Process and a device for shaping the loosen material of raw vegetable matter
WO2007051325A1 (en) * 2005-10-31 2007-05-10 Bühler AG Pellet press
US7241127B2 (en) * 2002-09-03 2007-07-10 Bühler AG Pelleting press
US7241128B2 (en) * 2003-02-21 2007-07-10 Sprout-Matador A/S Roller adjustment apparatus for an extrusion mill
EP2105292A1 (en) * 2008-03-26 2009-09-30 Salzhausener Maschinenbautechnik Salmatec GmbH Roller adjustment device

Family Cites Families (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2626576A (en) * 1948-12-10 1953-01-27 Edgar N Meakin Roller adjustment indicator for pellet mills
US2887718A (en) * 1955-02-15 1959-05-26 Sprout Waldron & Co Inc Pellet mill
US3017845A (en) * 1958-08-25 1962-01-23 Mahoney Thomas P Pellet mill
GB857133A (en) 1959-01-22 1960-12-29 Paul Bonnafoux Rotary pellet mill
US3045280A (en) * 1959-07-10 1962-07-24 Mahoney Thomas P Pellet mill and feeder therefor
US3807926A (en) 1972-04-06 1974-04-30 G Morse Pellet mill with positive feed
US3841817A (en) * 1973-09-19 1974-10-15 A Moldenhauer Pelletizing apparatus
US3932736A (en) * 1974-04-08 1976-01-13 Beta Corporation Of St. Louis Automatic pellet producing system
US3932091A (en) * 1975-01-28 1976-01-13 Johannes Albertus Vink Pellet mill with separate fee means for each die roller
DE7714334U1 (en) * 1977-05-06 1977-08-25 Kloeckner, Hermann, 3436 Hessisch- Lichtenau DEVICE FOR COMPRESSING DUST-SHAPED, FINE-GRAY OR FIBROUS INORGANIC OR ORGANIC MATERIALS, IN PARTICULAR FEED
SU683684A1 (en) * 1978-04-12 1979-09-05 Всесоюзный Научно-Исследовательский Конструкторско-Технологический Институт По Машинам Для Комплексной Механизации И Автоматизации Животноводческих Ферм Feed granulator
US4162881A (en) * 1978-05-24 1979-07-31 Morse George W Pellet mill with improved feed system
DE2917453C2 (en) 1979-04-30 1986-12-18 Unilever N.V., Rotterdam Method for regulating the operation of a pellet press
US4238432A (en) * 1979-05-03 1980-12-09 Internationale Octrooi Maatschappij Extrusion presses
US4463430A (en) * 1981-08-31 1984-07-31 Beta Corporation Microprocessor based pellet mill control
FR2548957A1 (en) * 1983-06-23 1985-01-18 Realisa Thermiques Meca Et Granulating press roller with head for adjusting the eccentricity
US4711622A (en) 1984-07-04 1987-12-08 Gebruder Buhler Ag Pellet mill
SU1291445A1 (en) * 1985-06-11 1987-02-23 Оренбургский политехнический институт Granulating press
SU1271444A1 (en) * 1985-06-18 1986-11-23 Головной Экспериментально-Конструкторский Институт По Машинам Для Переработки Травы И Соломы Press-granulator
NL8600523A (en) * 1986-02-28 1987-09-16 Cpm Europ B V Pelleting press has rotating annular die with press openings - contg. pressure rollers freely rotatable on shafts with ends in eccentric discs rotatably adjustable by actuators to vary roller-die spacing
SU1380667A1 (en) * 1986-06-05 1988-03-15 Головной Экспериментально-Конструкторский Институт По Машинам Для Переработки Травы И Соломы Press-granulator
NL8901038A (en) * 1989-04-25 1990-11-16 Robinson Milling Systems B V Pellet-forming press - has eccentric adjusting bushes with crank arms and pivoting hydraulic rams
NL8901130A (en) 1989-05-03 1990-12-03 Aarsen Maschf Bv GRAIN PRESS.
NL8902105A (en) * 1989-08-21 1991-03-18 Tno PELLETER PRESS.
CH681969A5 (en) * 1990-08-20 1993-06-30 Buehler Ag
US5248469A (en) 1992-10-19 1993-09-28 California Pellet Mill Company Mechanical remote roll adjusting apparatus and method for a pellet mill
US5472651A (en) * 1993-05-28 1995-12-05 Repete Corporation Optimizing pellet mill controller
DE4426372A1 (en) * 1994-07-26 1996-02-01 Salzhausener Maschinenbautechn Process for processing pelletizable material
NL1004319C2 (en) 1996-10-18 1998-04-21 Pelleting Technologie Nederlan Pelleteer.
TW445202B (en) * 1999-11-02 2001-07-11 Nippon Kokan Kk Molded lump and its production method thereof
MY122579A (en) * 1999-11-09 2006-04-29 Ishigaki Mech Ind Screw press
CN100532079C (en) * 2003-02-21 2009-08-26 安德里茨斯普劳特有限公司 Roller adjustment apparatus for an extrusion mill
CN201211712Y (en) * 2008-06-23 2009-03-25 上海天和制药机械有限公司 Pressure overload protection device
CN201677529U (en) * 2010-04-30 2010-12-22 北京汉坤科技有限公司 Planetary gear type inner and outer ring mold pressing mechanism for compressing and forming straw particles

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB989603A (en) * 1963-09-30 1965-04-22 Muhlenbau Dresden Veb Pressure-application device
US4498856A (en) * 1982-11-05 1985-02-12 Ru-Korrel (Propietary) Limited Compacting mill
FR2591438A1 (en) * 1985-12-12 1987-06-19 Bellefroid Charly Vincent Improved device for adjusting the distance between the rollers and the pressurised annular extrusion dies of an extruding machine for food granules
EP0231764A2 (en) * 1986-01-24 1987-08-12 Bühler Ag Pellet press
US4838779A (en) * 1986-05-20 1989-06-13 Van Aarsen Machinefabriek, B.V. Apparatus for a pelletizer having hydraulically adjustable pressing rolls
DE3813081A1 (en) * 1988-04-19 1989-11-02 Kahl Amandus Maschf Pan grinder press with a hydraulic device
US5251545A (en) * 1990-08-20 1993-10-12 Buhler Ag Method for slip regulation of a pellet mill and apparatus for carrying out the process
US20060082026A1 (en) * 2002-07-19 2006-04-20 Zhanbin Che Process and a device for shaping the loosen material of raw vegetable matter
US7241127B2 (en) * 2002-09-03 2007-07-10 Bühler AG Pelleting press
US7241128B2 (en) * 2003-02-21 2007-07-10 Sprout-Matador A/S Roller adjustment apparatus for an extrusion mill
WO2007051325A1 (en) * 2005-10-31 2007-05-10 Bühler AG Pellet press
EP2105292A1 (en) * 2008-03-26 2009-09-30 Salzhausener Maschinenbautechnik Salmatec GmbH Roller adjustment device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9682524B2 (en) 2013-02-26 2017-06-20 Bp Recycling Systems Gmbh Pelletizing or granulating apparatus
US11717987B2 (en) * 2016-05-24 2023-08-08 Websphere It & Soft Solutions Srl Compactor
EP3501811A1 (en) * 2017-12-21 2019-06-26 Fette Compacting GmbH Method for regulating the rotor speed of a rotor of a rotary tablet press and rotary tablet press

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