EP3473393B1 - Sammel- und abfuhrvorrichtung für den schneidmedienstrahl einer flüssigkeitsschneidanlage und flüssigkeitsschneidanlage - Google Patents

Sammel- und abfuhrvorrichtung für den schneidmedienstrahl einer flüssigkeitsschneidanlage und flüssigkeitsschneidanlage Download PDF

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Publication number
EP3473393B1
EP3473393B1 EP18201518.0A EP18201518A EP3473393B1 EP 3473393 B1 EP3473393 B1 EP 3473393B1 EP 18201518 A EP18201518 A EP 18201518A EP 3473393 B1 EP3473393 B1 EP 3473393B1
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EP
European Patent Office
Prior art keywords
jet
cutting
suction
discharge device
collecting
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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.)
Active
Application number
EP18201518.0A
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German (de)
English (en)
French (fr)
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EP3473393A1 (de
Inventor
Jan GRONEBERG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nienstedt GmbH
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Nienstedt GmbH
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Priority to PL18201518T priority Critical patent/PL3473393T3/pl
Publication of EP3473393A1 publication Critical patent/EP3473393A1/de
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26FPERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00Severing by means other than cutting; Apparatus therefor
    • B26F3/004Severing by means other than cutting; Apparatus therefor by means of a fluid jet
    • B26F3/008Energy dissipating devices therefor, e.g. catchers; Supporting beds therefor

Definitions

  • the invention relates to a collection and discharge device for the cutting media jet of a liquid cutting system with a cutting jet collector and a discharge for the cutting media stream collected via the cutting jet collector, which is composed of the medium of the cutting jet, entrained gas components from the ambient air and particles detached from the workpiece by the cutting jet.
  • the cutting jet collector has a jet discharge channel with an inlet area for introducing the cutting jet, which is in flow connection with an outlet area with a drain line.
  • the invention relates to a liquid cutting system with such a collection and discharge device.
  • Collection and discharge devices for the cutting media jet of a liquid cutting system of this type and an associated liquid cutting system are from the DE 35 18 166 C1 known.
  • the liquid cutting system described in connection with the functional description of the known collection and discharge device has a workpiece support over which workpieces are guided through the cutting jet by introducing a cut.
  • the cutting media jet emerging from the underside of the workpiece is collected, expanded and removed for processing via the collection and discharge device below the workpiece support.
  • the cutting media jet comprises on the one hand the actual, liquid cutting medium and on the other hand also possibly entrained gaseous components or solid particles originating from the workpiece.
  • Non-frozen foods are usually soft, which leads to the risk that solid components within the food get caught on the cutting tools and thus smear the cut.
  • a harder piece of chocolate or a fruit ingredient can make the cut edge so irregular that the product no longer meets the quality requirements.
  • fruit pulp can be smeared along the division plane, for example by a knife moved by a cake, so that an unsightly side surface results. For these reasons, cutting with a liquid jet is recommended.
  • the liquid jet is directed onto the workpiece with high pressure and emerges from the workpiece again with a slight expansion at the bottom.
  • the invention can optionally be used in connection with liquid cutting systems in which either the workpiece is moved relative to the cutting beam or, alternatively, the cutting beam is moved relative to the workpiece. A combination of both movements is also possible in the liquid cutting systems according to the invention.
  • the core of the invention is the complete collection of all components of the cutting media jet as well as their removal and processing.
  • the known liquid cutting systems already have collection and discharge devices for the emerging cutting media jet. It is known here to prepare this cutting media jet by means of different aids, for example to reduce the energy of the jet, so that the collecting and removal device is not exposed to excessive wear.
  • a disadvantage of the collection and discharge devices used hitherto is that below the workpiece, when the cutting media jet emerges from the cut, turbulence can occur which, on the one hand, can lead to portions of the fluid used for cutting or particles separated from the workpiece when cutting be released into the environment. Such particles can also settle on the underside of the workpiece.
  • moistening an open-cell foam below the cut line is usually undesirable.
  • Moisturizing is also not desirable in connection with food.
  • particles can settle in the area of the cut edges, which optically impair the look of the cut line or the food itself.
  • these can also be components in the form of powdered sugar or other constituents, which can be whirled up as a result of the dynamic movements which occur and can subsequently settle in an uncontrolled manner at undesired places.
  • the workpiece support can also be contaminated by such effects, which in turn can indirectly lead to contamination of the workpiece itself.
  • residues of the previously cut food can be deposited on the workpiece support, which then has to be cleaned in order to avoid contamination of the subsequent food.
  • this can lead to increased expenditure.
  • a liquid cutting system which has a jet discharge below the workpiece support.
  • This jet discharge is surrounded by an annular channel in which there is an increased liquid pressure provided by an external feed line, liquid being introduced into the jet discharge in the upper region from this channel.
  • a flow directed in the beam entry direction is generated within the beam discharge, into which the cutting beam enters, in order to brake and expand the cutting beam in the liquid flow in this way.
  • This device suffers from the disadvantage that contamination can occur underneath the workpiece support and effective removal of material to be cut is not possible. Furthermore, due to the water-filled inlet channel for the cutting jet, there is a risk that parts of the cutting jet or the water in the inlet channel will splash back.
  • a liquid cutting system for foodstuffs which has a lower jet discharge and an annular channel arranged around it, in which case suspended matter is extracted via the annular channel. This is achieved by connecting the duct to an external vacuum source, which in turn increases the effort.
  • the object of the invention is therefore to provide a collection and removal device for the cutting media jet of a liquid cutting system, via which the cutting media jet can be reliably removed in a structurally simple manner, the removed material preferably being able to be fed inexpensively and easily to a preparation.
  • Another object of the invention is to provide a liquid cutting system which has such a collection and removal device.
  • the cutting jet collector is designed in such a way that the jet discharge channel exits into a suction chamber which is arranged below the outlet area and which has an enlarged cross section in comparison to the cross section of the jet discharge channel in the exit area and next to the
  • the jet discharge channel is connected to the discharge line and a suction channel in terms of flow technology and is otherwise closed, the suction channel running to form a suction function to a suction opening forming a suction mouth in a suction area surrounding the inlet area of the jet discharge channel.
  • the object is achieved by a liquid cutting device according to claim 9.
  • a cutting jet collector which, essentially in the manner of a Venturi nozzle or a jet pump, is able to provide a suction function which removes the portions of the cutting media jet which do not find their way directly into the entry area of the suction channel or which exit from this entry area due to fluid dynamics , can suction and preferably feed the draining material in the drain line.
  • the above-mentioned suction function is preferably implemented by the flow speed of the cutting media jet.
  • the entry of the cutting media jet into a suction chamber downstream of the jet discharge channel, which can also be integrated into the jet discharge channel, is used to generate a suction vacuum.
  • the jet outflow channel is arranged in the central region of the cutting jet collector.
  • a possible embodiment has, for example, an upper, funnel-shaped inlet area, a straight channel course and an entry into the suction chamber arranged below the suction channel. The cutting medium flow entering the suction channel from above then enters the suction chamber in the form of a jet, with a negative pressure then arising in the suction chamber around the free jet of the cutting medium flow.
  • the suction chamber in turn is connected via the suction channel to a suction area which lies below the processing point at which the cutting media jet passes through the workpiece. It can be arranged, for example, above the entry area for the cutting media jet into the jet discharge channel, but it is also possible to arrange it next to the entry area or around the entry area or further down. In one of these possible configurations, there is, for example, a small space between the underside of the workpiece support and the top of the cutting jet collector, which forms the suction area. This space is sucked off by a suction mouth that is in flow connection with the suction channel.
  • the suction mouth is either ring-shaped or two or more preferably individual suction channels are provided that extend over the circumference of the entrance area of the jet discharge channel are distributed on its sides.
  • the cross sections of the suction channels can be round or oval or in the form of circular ring segments.
  • a nozzle can also be integrated directly into the jet discharge channel.
  • the through opening which penetrates the cutting beam collector has this nozzle in an upper region which, starting from a first cross section, has a second cross section which is reduced in the further beam path compared to the first cross section. Subsequent to this second cross-section, the diameter then increases again, the enlarged area then being able to form the suction chamber.
  • the suction channels or the suction channel are directly connected to the bore in the region of the third diameter with an enlarged cross section.
  • the negative pressure resulting in this area can also be made available via other lines of a separate suction chamber, into which the suction channels or the suction channel then open.
  • the essence of the invention is the fact that the flow dynamics are used to generate a vacuum or to reinforce a vacuum provided.
  • the invention can be used in connection with an explicit suction system, either to increase the vacuum used for suction or to expand the area in which a suction effect is effective. With the support of a suction pump, its performance can be reduced and energy saved.
  • the flow dynamics alone can provide the vacuum necessary for suction without additional, vacuum-generating devices.
  • This negative pressure is then used to pass through one or more suction mouths that are adjacent to or around the entry area of the cutting media jet are arranged in the jet discharge channel to suck off fluid components, particles or gases.
  • These undesirable components cannot precipitate on the workpiece or contaminate the environment, but are suctioned off and subsequently preferably fed back into the outflowing cutting medium stream in the discharge line, which flows out of the suction channel.
  • the liquid cutting system in addition to the actual processing station for the workpiece, in which a moving or stationary cutting jet emerges from a cutting jet nozzle and cuts the workpiece moved relative to the cutting jet nozzle, the liquid cutting system according to the invention also has the collecting and removal device described above. Furthermore, a preparation or at least one separation station for the individual components of the media contained in the cutting jet is preferably provided.
  • the way in which the workpiece is cut via the liquid jet or how the workpiece support is designed is not significant for the invention.
  • the present invention can basically be used with all possible configurations in this area.
  • the invention can in principle be used with all types of workpieces and cutting media, in particular water, oil or similar liquids.
  • the drain line feeds the material of the cutting media jet collected by the collecting and discharge device to a preparation or a separating device.
  • the media stream can basically also entrained particles of the workpiece itself, be it that they were loosened by the cutting process or fall off the workpiece during processing, and include gaseous components.
  • Gaseous components are usually air components that are entrained in the cutting media jet due to the flow dynamics, but other components, for example in the form of protective gas, can also occur here.
  • the gaseous components are preferably separated from the heavier particles and fluid components in a separator.
  • This separator is preferably a cyclone separator, which uses the different inertial forces in a rotating chamber or in a rotating media flow to separate the gases from the heavier components.
  • the gas components are then sucked off via a gas discharge, whereby they can additionally be filtered in order to filter out the last solid components or atomized liquid components. Electrostatic filters can also be used.
  • the heavier particles in turn can either be separated from one another either by the cyclone separator, a further cyclone separator or also by means of filters or sieves. Ultimately, this depends on the intended use, which determines which types of particles are in the cutting media flow.
  • the liquid can be discharged via a liquid discharge, possibly also with further filtering, or can be fed back into the liquid supply of the liquid cutting system. If this is necessary, the liquid can be further processed or disinfected, for example either by heating or by other known measures.
  • FIG. 1 a liquid cutting system according to the invention with a cutting jet collector 5 is shown schematically.
  • the cutting beam collector 5 is provided below the workpiece support 1 on which the workpiece 2 rests.
  • the workpiece support 1 is designed to be movable, for example, so that the workpiece 2 passes the cutting jet 4 emerging from the cutting jet nozzle 3, which thus makes a cut in the workpiece 2.
  • the cutting beam 4 passes through a gap (not visible here) in the workpiece support 1, through it and into the cutting beam collector 5. So that the gap does not have to extend through the entire length of the workpiece support 1, the workpiece 2 is preferably transported via a workpiece carrier along the top of the workpiece support 1. Due to the dynamics of the high-pressure cutting used here with pressures of the cutting medium of up to 6000 bar, the cutting medium jet emerges at high speed below the cut. This cutting media jet is composed of the actual cutting jet 4 as well as particles originating from the workpiece 2 and entrained air components.
  • the cutting media jet in turn enters the entry region of the jet discharge channel 6, not shown here, in the cutting jet collector 5.
  • the cutting beam 4 widens slightly.
  • the reflections from the beam discharge channel 6 and other effects it can additionally happen that particles are thrown out of the entrance area again in the opposite or a lateral direction.
  • the area below the workpiece support 1 can have both atomized liquid components, workpiece particles or liquid drops which, depending on the design of the workpiece support 1, either precipitate on the workpiece support 1 or on the workpiece 2 or can emerge from the liquid cutting system.
  • the suction function is provided according to the invention, which is in the area between the workpiece support 1 and the collection and discharge device provides a suction area 7.
  • Figure 2 shows the collection and discharge device in a schematic sectional view.
  • the cutting jet 4 emerging from the cutting jet nozzle 3 cuts the workpiece 2 and enters the collection and removal device through the opening in the workpiece support 1.
  • a jet discharge channel 6 is provided in the middle. In the upper area, this jet discharge channel 6 is widened like a funnel, in order to form an effective collector for the cutting media jet.
  • the jet discharge channel 6 emerges from the core of the collection and discharge device, a space being provided below this lower area, into which the cutting media jet then flows as a free jet.
  • This space which serves as a suction chamber, is enlarged in diameter compared to the outlet opening of the jet discharge channel 6; in the exemplary embodiment shown, the diameter is approximately twice as large as that of the jet discharge channel 6.
  • a suction channel 8 is arranged in a ring around the core of the collection and discharge device, so that the negative pressure is able to suction the area above the collection and discharge device, so that the area can function as a suction area 7.
  • particles and ambient air are sucked into the suction channel 8 and then together with the cutting media jet of the drain line 10 (cf. Figure 1 ) fed.
  • suction channel 8 shown here is only an example; here, instead of one annular channel, a plurality of suction channels 8 distributed over the circumference can of course also be provided.
  • the particular advantage of the invention is that the cutting media jet emerging from the jet discharge channel 6 itself generates the negative pressure, which allows the area above the collection and discharge device to become the suction area 7.
  • the media stream collected in this way is fed to a schematically illustrated preparation.
  • This consists of a separator 11, which separates gaseous components and the heavier solid or liquid components from one another.
  • This separator 11 preferably comprises a cyclone separator which, using the centrifugal forces, is able to separate gaseous components from the heavier other components, which are then removed by gas 13 flowing in a suction direction of the gas S G , if it is harmless to the environment, for example to the environment.
  • This separation via the cyclone separator is already known, for example, from the principle of bagless vacuum cleaners.
  • the remaining components are then discharged through the liquid discharge 12 in the direction of flow of the liquid S F and, if necessary, separated and disposed of via further cyclone separators or filter means or reused in the case of the fluid.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Laser Beam Processing (AREA)
EP18201518.0A 2017-10-23 2018-10-19 Sammel- und abfuhrvorrichtung für den schneidmedienstrahl einer flüssigkeitsschneidanlage und flüssigkeitsschneidanlage Active EP3473393B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL18201518T PL3473393T3 (pl) 2017-10-23 2018-10-19 Urządzenie zbierające i odprowadzające strumień mediów tnących instalacji do cięcia cieczą i instalacja do cięcia cieczą

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017124738.6A DE102017124738A1 (de) 2017-10-23 2017-10-23 Sammel- und Abfuhrvorrichtung für den Schneidmedienstrahl einer Flüssigkeitsschneidanlage und Flüssigkeitsschneidanlage

Publications (2)

Publication Number Publication Date
EP3473393A1 EP3473393A1 (de) 2019-04-24
EP3473393B1 true EP3473393B1 (de) 2020-03-25

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ID=63965137

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Application Number Title Priority Date Filing Date
EP18201518.0A Active EP3473393B1 (de) 2017-10-23 2018-10-19 Sammel- und abfuhrvorrichtung für den schneidmedienstrahl einer flüssigkeitsschneidanlage und flüssigkeitsschneidanlage

Country Status (6)

Country Link
EP (1) EP3473393B1 (pl)
DE (1) DE102017124738A1 (pl)
DK (1) DK3473393T3 (pl)
ES (1) ES2789174T3 (pl)
LT (1) LT3473393T (pl)
PL (1) PL3473393T3 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11518058B2 (en) 2019-12-16 2022-12-06 Nienstedt Gmbh Collecting and discharging device for the cutting jet of a liquid cutting system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518166C1 (de) 1985-05-21 1986-11-20 Dornier Gmbh, 7990 Friedrichshafen Einrichtung zum Abfangen des Schneidstrahles von Wasserstrahl-Schneidanlagen
US4651476A (en) * 1986-05-07 1987-03-24 Flow Systems, Inc. Compact receptacle with automatic feed for dissipating a high-velocity fluid jet
DE19806278A1 (de) * 1998-02-16 1999-08-26 Alba Ind Gmbh Verfahren zum Zertrennen eines radioaktiven Bauteils eines Kernreaktors und Vorrichtung hierzu
DE10051942B4 (de) * 2000-10-19 2004-12-02 Peter Lisec Verfahren und Vorrichtung zum Schneiden von Werkstoffplatten
DE102015118610A1 (de) * 2015-10-30 2017-05-04 Nienstedt Gmbh Vorrichtung zum Zerteilen von Lebensmitteln

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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Also Published As

Publication number Publication date
DE102017124738A1 (de) 2019-04-25
EP3473393A1 (de) 2019-04-24
PL3473393T3 (pl) 2020-07-13
DK3473393T3 (da) 2020-05-18
ES2789174T3 (es) 2020-10-26
LT3473393T (lt) 2020-06-10

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