• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    This invention relates to a method to grind meat in a grinder, comprising: providing the meat to the grinder via a hopper where the hopper includes a feeder worm for feeding the meat to a process unit, where the process unit comprises a rotating processing worm and a cutting set, the rotating processing worm being configured to receive the meat from the feeder worm and convey it to the cutting set which grinds the meat, wherein the method further comprises: automatically adjusting the revolutions per minute (RPM) of the rotating processing worm in response to a pressure creation in the process unit.
    公开号:DK201770566A1
    申请号:DKP201770566
    申请日:2017-07-11
    公开日:2019-01-28
    发明作者:Brøchner Lind Christian
    申请人:Marel A/S；
    IPC主号:
    专利说明:

    A METHOD AND AN APPARATUS OF GRINDING MEAT
    FIELD OF THE INVENTION
    The present invention relates to a method of grinding meat, and to a meat grinder of grinding meat.
    BACKGROUND OF THE INVENTION
    Meat grinders utilized to produce minced meat exist. In the most commonly used meat grinders the meat is provided to the grinder via a hopper and transported by a feeder worm to a rotating processing worm which conveys the meat towards a cutting set which grinds the meat. The meat that is fed into such grinders can be fresh meat with different lean/fat ratio or frozen meat blocks, or a combination thereof.
    When frozen meat blocks is be ground, and especially if the frozen meat blocks have high lean/fat ration, the grinders shut down due to too much load. Obviously, this reduces the profitability of a meat grinding plant and results in high maintenance costs.
    Such meat grinders run at a fixed rpm, and to overcome the power needed to grind such a frozen blocks, the grinders are replaced with grinders having a gearbox that run at lower rpm. The most powerful grinders run at 102 rpm 50 Hz, which gives 8500 Nm. However, such powerful grinders are both costly, and more importantly result in lower capacity when soft/fresh meat is to be grinded due to the lower rpm.
    SUMMARY OF THE INVENTION
    On the above background it is an object of embodiments of the present invention to provide a meat grinder that at all times is prevented from being overloaded and at the same time has a high capacity.
    In general, the invention preferably seeks to mitigate, alleviate or eliminate one or more of the above mentioned disadvantages of the prior art singly or in any combination. In particular, it may be seen as an object of embodiments of the present invention to provide an meat grinder that solves the above mentioned problems, or other problems.
    To better address one or more of these concerns, in a first aspect of the invention a method is provided to grind meat in a grinder, comprising:
    DK 2017 70566 A1 • providing the meat to the grinder via a hopper where the hopper includes a feeder worm for feeding the meat to a process unit, where the process unit comprises a rotating processing worm and a cutting set, the rotating processing worm being configured to receive the meat from the feeder worm and convey it to the cutting set which grinds the meat, wherein the method further comprises:
    • automatically adjusting the revolutions per minute (RPM) of the rotating processing worm in response to a pressure creation in the process unit.
    Said automatical adjustment of the revolutions per minute (RPM) of the rotating processing worm in response to a pressure creation in the process unit allows the grinder to operate as if it has automatic built gearbox that automatically reacts on the pressure creation in the process unit allows the meat grind to run optimally and simultaneously with high throuphput. Also, this enhances the livetime of the cutting set.
    In one embodiment, the step of adjusting the RPM of the rotating processing worm comprises either increasing or decreasing the RPM while remaining the conveying direction of the rotating processing worm. As an example, under normal conditions such a meat grinder it runs approx. 125 rpm approx. 60 Hz Torque app. 4500 Nm. If the product is e.g. hard to grind then accordingly the frequency will automatically be adjusted to e.g. 50 Hz (or below) while running at 102 rpm giving the maximum torque of around 8500 Nm. Via such an automatic operation the rotating processing worm optimal torque at all times. If on the other hand the pressure creation is reduced, e.g. now a fresh meat is fed into the meat grinder, the frequency will automatically be increased again and thus the capacity will be maximized.
    In one embodiment, the step of adjusting the RPM of the rotating processing worm comprises reducing the RPM down to zero followed by temporarily reversing the direction of rotation of the rotating processing worm. This is of particular advantage if a high pressure creation/load is still detected on the processing worm when running at e.g.50 Hz, then through said termporal reversing it is ensured that the pressure creation is overcome.
    In one embodiment, the temporal reversing is applied for a pre-defined time period, subsequently followed by a full power operation of the processing worm. Said step of temporal reversing followed by a full power operation of the processing worm is in one embodiment repeated until the pressure creation in the process unit is below a pressure target
    DK 2017 70566 A1 value.With such a sequential operation the meat grinder according to the present invention give 1.5 times or more compared to a conventional meat grinder.
    In one embodiment, the pressure created in the process unit is detected by the power consumption of the motor device driving the rotating processing worm. In another embodiment, the pressure created in the process unit is measured by a pressure sensor.
    In one embodiment, the pressure sensor is positioned in the vicinity of the cutting set. It is thus possible to adjust the rpm so as to maximize the quality of the grinded meat e.g. to prevent it from overheating.
    BRIEF DESCRIPTION OF THE DRAWINGS
    Embodiments of the invention will be described, by way of example only, with reference to the drawings, in which figure 1 shows a flowchart of a method according to the present invention, and figure 2 shows an embodiment of a meat grinder according to the present invention.
    DESCRIPTION OF EMBODIMENTS
    Figure 1 shows a flowchart of an embodiment of a method according to the present invention method to grind meat in a grinder.
    In step (S1) 101, a meat is proivded to the grinder via a hopper where the hopper includes a feeder worm for feeding the meat to a process unit, where the process unit comprises a rotating processing worm and a cutting set, the rotating processing worm being configured to receive the meat from the feeder worm and convey it to the cutting set which grinds the meat.
    In step (S2) 102, the revolutions per minute (RPM) of the rotating processing worm is automatically adjusted in response to a pressure creation in the process unit.
    In an embodiment, the step of automatically adjusting the RPM of the rotating processing worm comprises either increasing or decreasing the RPM while remaining the conveying direction of the rotating processing worm. A common „normal“ working conditions of such a meat grinder is to run at approx. 125 rpm approx. 60 Hz Torque app. 4500 Nm. Accordingly, If the product is a frozen meat clump having e.g. high lean/fat ratio, which is very difficult to grind, then according to the present invention, the frequency will automatically be adjusted to e.g. 50 Hz (or below) while running at 102 rpm, which increases the torque to a maximum
    DK 2017 70566 A1 torque, or around 8500 Nm. Via such an automatic operation the rotating processing worm optimal torque at all times. If on the other hand the pressure creation is reduced, e.g. now a fresh meat is fed into the meat grinder, the frequency will automatically be increased again and thus the capacity will be maximized.
    In another embodiment, the step of adjusting the RPM of the rotating processing worm comprises reducing the RPM down to zero followed by temporarily reversing the direction of rotation of the rotating processing worm. The fact that the load pressure is commonly highest it the visinity of the cutting set, results have shown that by temporarily reversing the rotating processing worm in an automatic way, such an overload may be overcome. The temporal reversing may in one embodiment be applied for a pre-defined time period, subsequently followed by a full power operation of the processing worm. This may be repeated until the pressure creation in the process unit is below a pressure target value.
    Said pressure creation may be detected by the power consumption of the motor device driving the rotating processing worm, and/or be measured by a pressure sensor, where the pressure sensor is positioned in the vicinity of the cutting set.
    In one embodiment, the present invention further comprises a further step (S3) 103, namely to adjust the rpm and thus the torque of the rotating processing worm so as remain optimal pressure at the cutting set so as to remain optimal quality of the grinded meat.
    Figure 2 shows a meat grinder 200 for grinding meat 205, 206, comprising a hopper 201 configured to receivea the meat to the grinder, a feeder worm 202 comprised in the hopper for feeding the meat to a process unit 207. The the process unit comprises a rotating processing worm 203 and a cutting set 204, the rotating processing worm being configured to receive the meat from the feeder worm and convey it to the cutting set which grinds the meat. The meat grinder further comprises a control unit 208 configured to automatically adjusting the revolutions per minute (RPM) of the rotating processing worm in response to a pressure creation in the process unit.
    While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive; the invention is not limited to the disclosed embodiments.
    Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the
    DK 2017 70566 A1 disclosure, and the appended claims. In the claims, the word comprising does not exclude other elements or steps, and the indefinite article a or an does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
    权利要求:
    Claims (10)
    [1] 1. A method to grind meat in a grinder, comprising:
    providing the meat to the grinder (101) via a hopper where the hopper includes a feeder worm for feeding the meat to a process unit, where the process unit comprises a rotating processing worm and a cutting set, the rotating processing worm being configured to receive the meat from the feeder worm and convey it to the cutting set which grinds the meat, wherein the method further comprises:
    automatically adjusting the revolutions per minute (RPM) (102) of the rotating processing worm in response to a pressure creation in the process unit.
    [2] 2. The method according to claim 1, wherein the step of adjusting the RPM of the rotating processing worm comprises either increasing or decreasing the RPM while remaining the conveying direction of the rotating processing worm.
    [3] 3. The method according to claim 1, wherein the step of adjusting the RPM of the rotating processing worm comprises reducing the RPM down to zero followed by temporarily reversing the direction of rotation of the rotating processing worm.
    [4] 4. The method according to claim 3, wherein the temporal reversing is applied for a predefined time period, subsequently followed by a full power operation of the processing worm.
    [5] 5. The method according to claim 4, wherein the step of temporal reversing followed by a full power operation of the processing worm is repeated until the pressure creation in the process unit is below a pressure target value.
    [6] 6. The method according to any of the preceding claims, wherein the pressure created in the process unit is detected by the power consumption of the motor device driving the rotating processing worm.
    [7] 7. The method according to according to any of the preceding claims, wherein the pressure created in the process unit is measured by a pressure sensor.
    DK 2017 70566 A1
    [8] 8. The method according to claim 7, wherein the pressure sensor is positioned in the vicinity of the cutting set.
    [9] 9. A meat grinder (200) for grinding meat (205, 206), comprising:
    5 a hopper (201) configured to receivea the meat to the grinder, a feeder worm (202) comprised in the hopper for feeding the meat to a process unit (207), where the process unit comprises a rotating processing worm (203) and a cutting set (204), the rotating processing worm being configured to receive the meat from the feeder worm and convey it to the cutting set which grinds the meat,
    [10] 10 wherein the meat grinder further comprises:
    a control unit configured to automatically adjusting the revolutions per minute (RPM) of the rotating processing worm in response to a pressure creation in the process unit.
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    同族专利:
    公开号 | 公开日
    EP3651909A1|2020-05-20|
    DK179632B1|2019-03-05|
    WO2019011810A1|2019-01-17|
    US20200179940A1|2020-06-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2812536A1|1978-03-22|1979-09-27|Walter Bauer|Double screw meat mincing machine - with pressure sensitive speed control of feeder screw|
    DE202005019152U1|2005-12-07|2006-05-24|Haack, Eberhard, Dr.-Ing.|Precutter for cutting set of a chopping machine, especially for mincing meat, including measuring chamber and sensors to provide measured values for controlling and optimizing cutting process|
    ES2608409T3|2011-02-16|2017-04-10|Albert Handtmann Maschinenfabrik Gmbh & Co. Kg|Device and procedure for feeding a food processing machine, in particular a stuffing machine or a meat grinder with food|
    CA2992663A1|2015-07-16|2017-01-19|Gea Food Solutions Bakel B.V.|Method to operate a grinder|
    法律状态:
    2019-01-28| PAT| Application published|Effective date: 20190112 |
    2019-03-05| PME| Patent granted|Effective date: 20190305 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201770566A|DK179632B1|2017-07-11|2017-07-11|A method and an apparatus of grinding meat|DKPA201770566A| DK179632B1|2017-07-11|2017-07-11|A method and an apparatus of grinding meat|
    US16/629,454| US20200179940A1|2017-07-11|2018-07-06|A method and an apparatus for grinding meat|
    EP18737617.3A| EP3651909A1|2017-07-11|2018-07-06|A method and an apparatus for grinding meat|
    PCT/EP2018/068384| WO2019011810A1|2017-07-11|2018-07-06|A method and an apparatus for grinding meat|
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