Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
  • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
  • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
  • B07C5/36—Sorting apparatus characterised by the means used for distribution

Definitions

• the present invention relates to a device for separating impurities, in particular metal, from a bulk material flow, wherein the device has at least one connectable to a bulk material supply
• Entrance opening for the bulk material one of the entrance opening in one
• Contaminants freed bulk has.
• a method for separating impurities, in particular metal, from a bulk material stream by means of a separation unit is proposed, wherein the bulk material flow is conducted from a bulk material supply via an inlet opening into the separation unit, and wherein the bulk material flow within the separation unit with the aid of a detector arrangement with respect to is monitored for the presence of impurities.
• Contaminants must be freed before the bulk material can be supplied to its further use.
• Corresponding impurities are present not only in natural products, but increasingly also in artificially manufactured products. For example, at the
• the separating device essentially consists of a suction nozzle guided through the lateral surface of the conveying device, which, after the detection of a piece of metal by means of the metal detector, is acted upon by the evaluation and control unit with a pressure which is below the pressure value prevailing in the conveying device.
• EP 0 202 356 A1 describes a conveyor for
• an induction coil is connected, which is connected to a control device for a failure flap, through which the ausschecheidenden metal particles on a
• Failure opening can be eliminated from the cargo.
• the failure flap and the failure opening are within one
• the delivery line passes through which the delivery line passes. Furthermore, the delivery line has an inflow opening within the separation vessel through which the air reaching the container when depositing the metal particles can flow back into the delivery line. Since the separation container is connected directly to the delivery line, a bypass line can be omitted. Although a reliable separation of particular metal particles from a bulk material flow is possible by the previously known solutions in the rule. At the same time, however, it always happens during the excretion process to a, albeit short, interruption of the flow of bulk material. This in turn results in an influence or even interruption of the subsequent production process. If the machine processing the granulate is an extruder, then a stop of the
• Object of the present invention is therefore to propose a device or a method by which impurities from a
• Bulk flow can be removed without it comes to a tearing off of the bulk material flow.
• the device according to the invention is characterized in that the separation unit has at least two delivery channels which are connected in parallel and branch off from the inlet opening, wherein the delivery channels are each passable by a bulk material partial flow.
• the bulk material flowing in via the inlet opening which may, for example, be a plastic granulate for the subsequent processing in an extruder connected downstream of the device, is divided into a plurality of bulk material partial streams before passing through the separating unit.
• each of the conveying channels is at least one detector for detection
• the detector is preferably a metal detector, with the aid of which the passage of a metal particle can be detected.
• each delivery channel is assigned a separation unit, with their Help of the respective conveying channel passing bulk material part stream is diverted into a disposal channel system.
• the separation unit thus does not serve for the exclusive removal of the contamination. Rather, it is provided that each bulk material partial flow passes through the device from the inlet opening to the corresponding outlet, as long as the respective detectors do not deliver a signal which is based on the presence of detectable by the detector
• one of the detectors indicates that an impurity, for example a metal particle, has passed through, then only the partial flow of bulk material corresponding to that of the corresponding bulk material is used
• Disposal channel system redirected and disposed of, for example.
• the period of diversion depends on the conveying speed of the bulk material flow and should be such that the detected contaminant is diverted together with the bulk material surrounding the contaminant and thus removed from the bulk material flow.
• Production process can be supplied.
• Production stop the subsequent production unit (for example, an extruder) can be excluded.
• disposal channel system within the scope of the invention does not necessarily have to be an extensive pipe system. Rather, that can
• Openings are formed over which the one or more diverted
• Bulk material streams can be ejected into an open container.
• the separating device in each case comprises a separating element.
• the separating element may be formed, for example, as a pivotable switch element, which by means of a
• the drive between a passing position, in which the associated delivery channel of one of the bulk material streams is passable, and a Abtrwolf in which the corresponding bulk material flow is diverted into the disposal channel system, is movable.
• the separating element is thus movable between two positions, wherein the bulk material part stream, which passes through the associated conveying channel leaves the device in a first position without diversion via the outlet and is diverted in a second position in the disposal channel system.
• the drive can in turn be connected to a control and / or regulating unit, the drive in
• Direction of conveying a divider is arranged upstream of the division of the bulk material flow in the individual delivery channels. Even if by a corresponding geometry or arrangement of the delivery channels an automatic distribution of the
• the divider is preferably placed between the inlet opening and the subsequent conveyor channels, wherein the inlet opening in turn with a corresponding
• the bulk material supply is connectable or connected.
• the bulk material supply can be designed, for example, as a bulk material storage container, which is arranged above the device according to the invention and which, for example, via a mass flow-regulating metering unit, a constant bulk material mass or
• the divider comprises a plurality of flow guide elements, with the aid of which in each case a bulk material partial flow of the over the
• Entrance opening incoming bulk material flow can be branched off and deflected into one of the delivery channels.
• the divider may in this case for example have an input port forming the inlet opening of the device and a plurality of outlet openings or outlet ports which open into the corresponding conveyor channels (the number of outlet openings or nozzles preferably corresponds to the number of conveyor channels).
• corresponding flow guide elements are present, which cause a division of the inflowing via the inlet opening bulk material flow.
• the flow guide elements can be in the form of baffles, for example, which can be set obliquely in the direction of the inlet opening within the divider.
• the divider with a plurality of flow guide elements in the form of flow obstacles.
• the flow guide for example, by several, z. B. bolt-shaped, internals are formed, which preferably extend perpendicular to the conveying direction (for example, between two walls of the divider) and on which the bulk material impinges when passing through the divider and this is redirected accordingly.
• Flow guide one or more movably mounted guide surface (s) has.
• the guide surfaces can be movable, for example, by means of a drive or manually, for example in the conveying direction mentioned.
• Bulk material flow are at least temporarily changeable. In this way, it can finally be ensured that the bulk material mass flow can be divided as evenly as possible over the individual delivery channels.
• Schüttgutstrom be sorted in a sense before he meets the remaining flow guide. If it can be determined by appropriate measurements or observations that the bulk material flow is distributed unevenly to the individual delivery channels, the ratio of the respective mass flows can be adjusted with the aid of the guide surfaces before the
• Flow cross-sectional area of the inlet opening has an amount which is between 2.0 and 0.2, preferably between 1, 6 and 0.4, particularly preferably between 1, 2 and 0.6. If the value is greater than 1, it is ensured that, when a delivery channel is blocked, part of the bulk material part stream normally flowing through this delivery channel can be removed via one of the remaining delivery channels. By contrast, a value of less than 1 is advantageous if the mass flow of the bulk material fed in via the inlet opening is lower than that due to the flow diameter of the bulk material Input opening is possible maximum mass flow.
• Blocking conveyor channel it is also ensured in this case that the bulk material flow can pass through the device via the remaining conveyor channels, the conveyor channels may be formed smaller in this case than in the first case.
• the flow cross-sectional areas of the individual delivery channels are the same or deviate from each other by no more than 20%, preferably not more than 10%.
• the delivery channels, the detectors and the separation unit can be designed to be the same or equally dimensioned.
• the device may consist of identical units (consisting of conveying channel, separating unit and the following
• Output opening which in turn can be placed in parallel, for example in a row next to each other.
• the outlet opening may be part of an outlet nozzle of the respective unit, which on the one hand merges into the separating unit and on the other hand has said outlet opening.
• the outlet openings may in this case lie next to one another in a row, so that the bulk material partial flows leaving the individual units can be reunited after passing through the device according to the invention.
• the outlet openings may, for example, be in the form of outlet nozzles, each of which (viewed in the conveying direction) follows the separating device of the respective one Transport channels are placed or connected to this. Assign that
• the cross section of the outlet port of a round shape merges into a slot-shaped, for example rectangular, shape.
• the exit openings may be arranged in a row, with the longitudinal axes of the exit openings being in line. This is particularly advantageous if the flow of bulk material leaving the device according to the invention before the actual
• disposal nozzle includes.
• the disposal nozzles can be connected, for example, with corresponding connecting elements (eg in the form of hose clamps) to the respective delivery channels. It is also conceivable that the disposal nozzle and / or the
• Disposal channel are formed curved. That the respective
• Abscheideikien remote end of the disposal channel can on this Be placed in a location that is outside the area in which the outlet of the device is located. Preference is given to a point which, with regard to the conveyor channels arranged next to one another, lies laterally next to these, so that the disposal channel system does not collide with a belt scale which, after installation of the device according to the invention, runs below it in a machine processing the bulk material.
• the inventive method for separating impurities, in particular metal, from a bulk material flow comprises the following steps:
• Entrance opening in a separating unit having a device (which may have one or more of the features described above),
• the core of the method according to the invention is therefore a
• bulk material streams can pass the device without diversion and the subsequent production process, for example a
• the bulk material flow is preferably fanned, so that the most uniform possible distribution of the bulk material flow takes place on the individual parallel conveyor channels.
• the bulk material streams can be reunited and ejected together from the device used.
• a separate ejection is conceivable, so that the bulk material partial flows only after the impact of a subsequent conveyor, such as a
• the bulk material flow is evenly distributed over the individual conveying channels, or if the mass flows of the bulk material partial streams passing through the individual conveying channels differ by a maximum of 20%, preferably by a maximum of 10%.
• Method according to the invention can be carried out as inexpensively and with easy-to-maintain units. It is also advantageous if the one having contamination
• the separating device can divert the bulk material part stream in the manner of a flow switch, wherein it is preferably in communication with a control and / or regulating unit which moves the separating element as a function of the signals supplied by the corresponding detector between two positions (redirecting to no diversion of the bulk material part stream) ,
• the flow of bulk material at least partially flows through the separation unit in the vertical direction.
• no additional conveyors are necessary because the bulk material can flow through the corresponding separation units due to gravity.
• the delivery channels preferably run in a vertical or slightly inclined direction to the vertical. The same applies to the components of the disposal channel system.
• Figure 1 is a front view of a known device for
• FIG. 2 shows a rear view of the device shown in FIG. 1,
• Figure 3 is a side view of that shown in Figures 1 and 2
• Figure 4 is a front view of a device according to the invention for Removal of impurities from a bulk flow
• FIG. 5 shows a partially sectioned side view of FIG. 4
• FIG. 6 shows a partially sectioned detail of the device shown in FIGS. 4 and 5,
• Figure 7 is a front view of another invention
• FIG. 8 shows a partially sectioned side view of FIG. 7
• FIG. 9 shows a partially sectioned detail of the device shown in FIGS. 7 and 8, FIG.
• FIG. 11 shows an alternative embodiment of that shown in FIG.
• Figures 1 to 3 show a known with respect to the basic structure device for separating impurities 1 from a
• Bulk materials Such devices are always used when a bulk material 4 (eg a plastic granulate) to be processed in a subsequent production machine (for example an extruder) monitors for contaminants 1 and the contaminants 1 are removed from the product
• a bulk material 4 eg a plastic granulate
• a subsequent production machine for example an extruder
• the bulk material 4 may originate, for example, from a bulk material supply 2 indicated only in FIG. 3, which may for example be designed as a bulk material container, which, preferably via a corresponding metering device, has a constant
• the bulk material 4 happens later, d. H. in the shown
• a detector 8 which is designed to detect the contaminants 1 to be removed. It is conceivable, for example, the use of a metal detector, which is known in the art and with the help of which can be detected within the bulk material flow entrained metal parts or splinters. Is generated by the detector 8, a signal that the presence of a
• Pollution 1 can close in the flow of bulk material flowing from above, so (preferably with the aid of a control and / or control unit, not shown), a drive 12 (see Figures 1 and 2) set in motion, which within a in the conveying direction F to the Detector 8 subsequent deposition unit 5, a corresponding actuator is actuated such that the bulk material flow in a branching from the separation unit 5
• Disposal channel system 10 is redirected.
• the diversion is maintained until the detected contaminant 1 has left the device including the bulk material 4 surrounding the contaminant 1 (the time can be calculated, for example, from the flow rate of the bulk material flow and the dimensions of the separation unit 5).
• the drive 12 is activated again to move said actuator back to a position in which the bulk material flow the
• Separator unit 5 passes without being redirected into the disposal channel system 10.
• the bulk material flow passes through the entire device in this case, starting from the inlet opening 3 via the separation device and finally leaves the device via the downward-pointing outlet 6, and then the other
• Interruption usually lasts only a few seconds, there is a risk that it comes to a machine stop.
• the separation unit 5 has at least two delivery channels 7 which are connected in parallel and branch off from the inlet opening 3, as is the case
• the input opening 3 is preferably preceded in the conveying direction F by a divider 13 which effects separation of the bulk material flow, for example by means of flow guide elements 14 (see FIG. 6) arranged within the divider 13.
• the individual bulk material streams are passed after their division by the corresponding conveyor channels 7 (which extend to an outlet 6) and in this case each pass a detector 8 a detector assembly 18 and finally for each conveyor channel 7 also separately present separation device. 9 If an impurity 1 is detected by one of the detectors 8, a redirecting of the same occurs within the corresponding separating device 9
• the diversion takes place, for example, with the aid of a separating element 1 1 shown by way of example in FIGS. 9 and 10, which is moved by means of a drive 12 from a first pass position (FIG. 9) into a second diversion position (FIG 10) is movable.
• Disposal channel system 10 is present.
• the disposal channel 10 for this purpose have a common disposal channel 16, which is connected via individual disposal pipe 17 with the respective separation devices 9.
• the disposal channel 16 and the disposal nozzle 17 may be formed integrally. It is more advantageous, however, the said elements, preferably releasably, with the aid of appropriate
• Figures 7 and 8 show a further embodiment of the device according to the invention, which may also have a divider 13 in the sense of the previous description. In contrast to the embodiment described so far, this solution is characterized
• the individual conveying channels 7 each comprise an outlet nozzle 20, which is formed integrally with the preceding section of the corresponding conveying channel 7 or, for example, releasably, can be connected to this.
• outlet nozzles 20 each have a slot-shaped outlet opening 15, which can be produced, for example, by a funnel-shaped shaping of the outlet nozzles 20.
• the respective outlet openings 15 are preferably arranged side by side or aligned with each other (see also FIG. 8), so that the individual bulk material part streams combine on leaving the device and act as a broad flow of bulk material onto an underlying (not shown).
• Fall arresting device If a conveyor belt or a belt scale is used as the catching device, the conveying direction of which runs from right to left (or vice versa) with reference to FIG.
• Such storage of the bulk material 4 finally ensures that the bulk material 4 before the actual further processing particularly evenly with one or more additives (for example in the form of plastic flakes) can be mixed.
• the additive merely has to be applied uniformly to the moving bulk material carpet, wherein one or more of the devices according to the invention can also be used in the metering of the additive.
• FIG. 1 a further, partially cut, embodiment of the described divider 13 is shown.
• the divider 13 is characterized in that one of the flow guide elements 14 has two, preferably laterally projecting, guide surfaces 21, with the aid of which the bulk material
• the guide surfaces 21 are preferably movably mounted in the conveying direction to the flow direction of the pre-separated bulk material streams

Landscapes

• Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
• Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
• Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
• Combined Means For Separation Of Solids (AREA)
• Sorting Of Articles (AREA)

Applications Claiming Priority (2)

Publications (1)

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Country Status (8)

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Family Cites Families (19)

• 2013
  • 2013-05-08 DE DE102013104740.8A patent/DE102013104740B4/de not_active Expired - Fee Related
• 2014
  • 2014-05-05 WO PCT/EP2014/059054 patent/WO2014180762A1/de active Application Filing
  • 2014-05-05 CN CN201480025799.8A patent/CN105163872A/zh active Pending
  • 2014-05-05 KR KR1020157031386A patent/KR20150138338A/ko not_active Application Discontinuation
  • 2014-05-05 JP JP2016512310A patent/JP2016516579A/ja active Pending
  • 2014-05-05 EP EP14724358.8A patent/EP2994245A1/de not_active Withdrawn
  • 2014-05-05 RU RU2015152234A patent/RU2609189C1/ru not_active IP Right Cessation
  • 2014-05-05 US US14/785,089 patent/US20160082481A1/en not_active Abandoned

Non-Patent Citations (2)

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