EP1953098B1 - Dispositif de vidange pour sacs de poudre pour installations de revêtement par poudre vaporisée - Google Patents

Dispositif de vidange pour sacs de poudre pour installations de revêtement par poudre vaporisée Download PDF

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Publication number
EP1953098B1
EP1953098B1 EP07120891A EP07120891A EP1953098B1 EP 1953098 B1 EP1953098 B1 EP 1953098B1 EP 07120891 A EP07120891 A EP 07120891A EP 07120891 A EP07120891 A EP 07120891A EP 1953098 B1 EP1953098 B1 EP 1953098B1
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EP
European Patent Office
Prior art keywords
powder
bag
hopper
emptying device
receiving hopper
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.)
Active
Application number
EP07120891A
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German (de)
English (en)
Other versions
EP1953098A1 (fr
Inventor
Felix Mauchle
Mark Steinemann
Hanspeter Vieli
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.)
Gema Switzerland GmbH
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Gema Switzerland GmbH
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Filing date
Publication date
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Publication of EP1953098A1 publication Critical patent/EP1953098A1/fr
Application granted granted Critical
Publication of EP1953098B1 publication Critical patent/EP1953098B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1454—Arrangements for supplying particulate material comprising means for supplying collected oversprayed particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1472—Powder extracted from a powder container in a direction substantially opposite to gravity by a suction device dipped into the powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B69/00—Unpacking of articles or materials, not otherwise provided for
    • B65B69/0075—Emptying systems for flexible intermediate bulk containers [FIBC]
    • B65B69/0091—Emptying systems for flexible intermediate bulk containers [FIBC] using frames whereby the container is bottom supported
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/144—Arrangements for supplying particulate material the means for supplying particulate material comprising moving mechanical means
    • B05B7/1445—Arrangements for supplying particulate material the means for supplying particulate material comprising moving mechanical means involving vibrations

Definitions

  • the invention relates to an emptying device for powder bags for powder spray coating systems according to the preamble of claim 1.
  • An emptying device of this kind is from the DE 39 20 635 A1 known. It contains a rigid receiving hopper, which is open at the top and has a downwardly tapered shape, so that there is also a usable from above into the receiving hopper sack, in which powder is, receives the downwardly tapered shape of the receiving hopper.
  • a powder suction tube is inserted from above into the bag and provided at its lower end with a vibrator for vibrating the lower end of the powder suction tube.
  • a compressed air line opens from below into the top of the receiving hopper into the space between the hopper and bag, so that in this space compressed air surges predetermined frequency can be supplied.
  • Powder manufacturers provide spray coating powders in powder containers, which are often powder bags, to spray coating companies.
  • the coating powder is sprayed by means of a spray coating system on objects to be coated. Thereafter, the coating powder is melted onto the coated objects by heat.
  • Powder bags can have a common bag shape. They may also be formed from one of the shape of a Kunststoffschlaüches, which is welded shut down and above and is cut up to empty the powder coating.
  • the powder sacks often remain in the spray coater while removing coating powder in a dimensionally stable carton in which the powder sack has been supplied by the powder manufacturer.
  • Fig. 1 schematically shows a preferred embodiment of a powder spray coating system according to the invention for spray coating of objects 2 with coating powder, which is then melted in a furnace, not shown, on the object.
  • One or more electronic control units 3 are provided for controlling the functions of the powder spray coating system.
  • For pneumatic conveying of the coating powder powder pumps 4 are provided. These can be injectors, in which coating powder is sucked by means of compressed air serving as compressed air from a powder container, after which then the mixture of conveying air and coating powder flows together into a container or to a spraying device.
  • Injectors are z. B. from the EP 0 412 289 B1 known.
  • a powder pump and those types of pumps can be used which convey small portions of powder by means of compressed air in succession, each one small powder portion (powder) stored in a powder chamber and then forced out of the powder chamber by means of compressed air. The compressed air remains behind the powder portion and pushes the powder portion in front of him.
  • These types of pumps are sometimes called pneumatic push pumps or pumping pumps as the compressed air pushes the stored powder portion through a pump outlet line like a plug.
  • Various types of such powder pumps for conveying dense coating powder are known, for example, from the following documents: DE 103 53 968 A1 . US 6,508,610 B2 . US 2006/0193704 A1 . DE 101 45 448 A1 . WO 2005/051549 A1 ,
  • the invention is not limited to any of the mentioned types of powder pumps.
  • a compressed air source 6 is provided, which via corresponding Druckeinstellelemente 8, z. B. pressure regulator and / or valves, is connected to the various devices.
  • Fresh powder from a powder supplier is from a supplier container, which, for example, a small container 12 z. B. in the form of a dimensionally stable container or a bag with a powder amount of, for example, between 10 to 50 kg, z. B. 25 kg, or z. B. a large container 14, for example, also a dimensionally stable container or bag, with a powder amount between, for example, 100 kg and 1000 kg may be supplied by means of a powder pump 4 in a fresh powder line 16 or 18 of a screening device 10.
  • the screening device 10 may be provided with a vibrator 11.
  • the terms "small container” and “large container” respectively mean both "dimensionally stable container” and “non-dimensionally stable, flexible bag", unless expressly referred to one or the other Be Strukturnisart.
  • the coating powder sieved by the sieve device 10 is conveyed by gravity or preferably in each case by a powder pump 4 via one or more powder feed lines 20 through powder inlet openings 26 into an intermediate container chamber 22 of a dimensionally stable intermediate container 24.
  • the volume of the intermediate container chamber 22 is preferably substantially smaller than the volume of the fresh powder small container 12.
  • the powder pump 4 of the at least one powder supply line 20 to the intermediate container 24 a Compressed air thrust pump.
  • the initial portion of the powder supply line 20 may serve as a pump chamber, in which sieved by the sieve 10 powder through a valve, for. B. a pinch valve falls. After this pumping chamber contains a certain powder portion, the powder supply line 20 is fluidically separated by closing the valve of the screening device 10. Thereafter, the powder portion is pushed by compressed air through the powder supply line 20 into the intermediate container chamber 20.
  • the powder inlet openings 26 are preferably arranged in a side wall of the intermediate container 24, preferably near the bottom of the intermediate container chamber 22, so that when flushing the intermediate container chamber 22 by means of compressed air also located on the bottom powder residues can be driven out by the powder inlet 26, for which purpose the powder supply lines 20 preferably from the screening device 10 are separated and directed into a waste container, as in Fig. 1 is indicated schematically by a dashed arrow 28.
  • a plunger 30 provided with compressed-air nozzles can be moved through the intermediate container chamber 22.
  • Pulverauslassö réelleen 36 are powder pumps 4, z. B. injectors, connected to spray devices 40 for conveying coating powder through powder lines 38.
  • the spray devices 40 may include spray nozzles or rotary atomizers for spraying the coating powder 42 onto the object 2 to be coated, which is preferably located in a coating booth 43.
  • the powder outlet openings 36 are preferably located in a wall opposite the wall in which the powder inlet openings 26 are located.
  • the powder outlet openings 36 are preferably also located near the bottom of the intermediate container chamber 22.
  • the tundish chamber 22 preferably has a size which is within the range of a capacity of coating powder between 1.0 kg and 12 kg, preferably between 2.0 kg and 8.0 kg. According to other aspects, the size of the intermediate container chamber 22 is preferably between 500 cm 3 and 30,000 cm 3 , preferably between 2000 cm 3 and 20,000 cm 3 . The size of the tundish chamber 22 is selected in accordance with the number of powder vents 36 and the powder lines 38 connected thereto so that a continuous spray coating operation is possible, but the tundish chamber 22 can be quickly cleaned in powder changeover pauses, preferably automatically.
  • the intermediate container chamber 22 may be provided with a fluidizing device for fluidizing the coating powder.
  • Coating powder 42 which does not adhere to the object 2, is sucked as excess powder via a surplus powder line 44 into a cyclone separator 48 by means of a suction air flow of a blower 46.
  • the excess powder is separated in Zyklonabscheider 48 as far as possible from the suction air stream.
  • the separated powder portion is then passed as a recovery powder from the cyclone 48 via a powder recovery line 50 to the sifter 10, where it passes through the sifter 10, either alone or mixed with fresh powder via the powder supply lines 20 back into the intermediate container chamber 22.
  • FIG Fig. 1 is shown schematically by a dashed line 51.
  • the powder recovery line 50 in order not to be separated from the screening device 10, may be provided with a switch 52, to which it is alternatively connectable to the screening device 10 or to a waste container.
  • the intermediate container 24 may have one or more, for example two sensors S1 and / or S2, in order to control the supply of coating powder into the intermediate container chamber 22 by means of the control unit 3 and the powder pumps 4 in the powder feed lines 20.
  • the lower sensor S1 detects a lower powder level limit
  • the upper S2 sensor detects an upper powder level limit.
  • the lower end portion 48-2 of the cyclone 48 may be formed and used as a reservoir for recovery powder and provided with one or more, for example, two sensors S3 and / or S4, which are functionally connected to the control unit 3.
  • the fresh powder supply can be automatically stopped by the Frischpulverzutechnischen 16 and 18, as long as sufficient recovery powder is present in the cyclone 48 to the intermediate container chamber 22 through the sieve 10 therethrough recuperation powder in sufficient quantity, which is required for the spray coating operation by means of the spray devices 40. If there is no longer sufficient recovery powder in the cyclone separator 48, then the supply of fresh powder through the fresh powder supply lines 16 or 18 can be switched over automatically. Furthermore, it is also possible to feed fresh powder and recovery powder simultaneously to the sieve device 10 so that they are mixed together.
  • the exhaust air of the cyclone 48 passes through an exhaust duct 54 in a Nachfiltervorraum 56 and therein by one or more filter elements 58 to the fan 46 and after this in the outside atmosphere.
  • the filter elements 58 may be filter bags or filter cartridges or filter plates or similar filter elements.
  • the separated by the filter elements 58 from the air flow powder is usually waste powder and falls by gravity into a waste container or can, such as Fig. 1 shows, via one or more waste lines 60, each containing a powder pump 4, are conveyed into a waste container 62 at a waste station 63.
  • the waste powder may also be recovered to the screening device 10 to re-enter the coating circuit.
  • Fig. 1 represented by switches 59 and branch lines 61 of the waste lines 60 schematically.
  • the cyclone separator 48 and the post-filter device 56 are usually used, and the waste powder of the post-filter device 56 enters the waste container 62.
  • the powder separation efficiency of Although cyclone 48 is usually less than that of the post-filter 56, it can be cleaned faster than the post-filter 56.
  • cyclone separator 48 is usually used in combination with post-filter device 56 only if it is a problematic coating powder.
  • recovery powder of the cyclone 48 is supplied via the powder recovery line 50 of the screening device 10, while the waste powder of the Nachfiltervoriques 56 as waste in the waste container 62 or in another waste container, the latter without waste lines 60 directly below an outlet opening of the Nachfiltervortechnisch 56th can be made.
  • the lower end of the cyclone device 48 may include an outlet valve 64, such as a pinch valve. Furthermore, a fluidizing device 66 for fluidizing the coating powder may be provided above this outlet valve 64, in or at the lower end of the, designed as a reservoir, lower end portion 48-2 of the cyclone 48.
  • the fluidizing device 66 includes at least one fluidising wall 80 of an open-pore or narrow-bore material which is pervious to compressed air but not to coating powder.
  • the fluidizing wall 80 is disposed between the powder path and a fluidizing compressed air chamber 81.
  • the fluidizing compressed-air chamber 81 can be connected to the compressed-air source 6 via a pressure-adjusting element 8.
  • the fresh powder line 16 and / or 18 may be fluidly connected at its upstream end, either directly or through the powder pump 4, to a powder delivery tube 70 which is submerged in the supplier vessel 12 or 14 for aspiration of fresh coating powder.
  • the powder pump 4 may be disposed at the beginning, at the end or in between in the fresh powder line 16 or 18 or at the upper or lower end of the powder conveying tube 70.
  • Fig. 1 shows as fresh powder small container a fresh powder powder bag 12 in a bag receiving hopper 74.
  • the powder bag 12 is held by the bag receiving hopper 74 in a defined shape, wherein the bag opening is located at the upper bag end.
  • the bag receiving hopper 74 may be disposed on a scale or weighing sensors 76. Depending on the type, this balance or the weighing sensors can generate an optical display and / or an electrical signal which, after subtracting the weight of the bag receiving hopper 74, corresponds to the weight and thus also the amount of the coating powder in the small container 12.
  • At the bag receiving hopper 74 at least one vibrator 78 vibrating it is preferably arranged.
  • Two or more small containers 12 can each be provided in a bag receiving hopper 74 and / or two or more large containers 14, which can be used alternatively. As a result, a quick change from one to another small container 12 or large container 14 is possible.
  • the screening device 10 can be integrated into the intermediate container 24. Furthermore, the screening device 10 can be omitted if the fresh powder has a sufficiently good quality. In this case, it is also possible to use for sieving the recovery powder of the lines 44 and 50, a separate sieve, z. Upstream or downstream of the cyclone shut-off 48 or in the cyclone shut-off 48. Also, the recovery powder will not require a sieve if its powder grade is sufficiently good for reuse.
  • an emptying device for emptying the powder bag 12, which has a bag receiving hopper 74.
  • Preferred embodiments of the emptying apparatus are exemplified in the following FIGS. 2 to 9 are shown.
  • the bag receiving hopper 74 is narrower at the bottom to receive the powder bag 12 than at the top, so that the funnel wall holds the powder bag 12 in a stable shape and position at which the bag opening 106 is at the top bag end.
  • the funnel angle ⁇ on the inner surface of the bag receiving funnel 74, preferably also on the funnel outer surface, is preferably between 45 ° and 90 °, more preferably between 50 ° and 70 °, for example about 60 °.
  • the powder bag 12 may consist of a plastic film, in particular a plastic tube, which is at least welded to the lower end of the tube, which forms the lower bag end. It can also be welded closed at the top of the bag. The upper bag end must then be cut to remove the coating powder.
  • the funnel angle is preferably dimensioned such that the powder particles can slide down with decreasing amount of powder in the powder bag on the bag wall down by gravity.
  • the funnel center axis 108 of the bag receiving hopper 74 is preferably arranged vertically. According to other embodiments, the funnel center axis 108 can also be arranged obliquely as long as the funnel-shaped funnel inner surface is inclined upwards in all areas.
  • the bag receiving hopper 74 preferably has a circular cross-section along its entire height along the hopper centerline 108 transverse to this hopper centerline 108 as shown in the drawings, although of course other cross-sectional shapes are possible, such as an oval peripheral or angular peripheral shape.
  • the bag receiving hopper 74 is provided with at least one weight sensor for measuring the weight of the bag receiving hopper 74 including its contents, in particular the amount of powder.
  • the at least one weight sensor may be designed such that it visually displays the weight and / or be designed such that a signal device operatively connected to it, for example the control unit 3, generates a signal as a function of the measured weight.
  • the signal is generated according to a particular embodiment of the invention in each case when a certain minimum weight is reached or fallen below. Signals may also be generated depending on two or more different powder weights, for example a signal indicative of the upcoming one Achieving the minimum weight and / or on the early achievement of the empty state of the powder bag.
  • a weighing device for example, in the embodiment according to Fig. 2 and Fig. 3 three load cells 76 (76-1, 76-2 and 76-3) are provided, on which the bag receiving hopper 74 is supported at three different circumferential locations.
  • a scale 112 for weighing the bag receiving hopper 74, a scale 112 as a weighing device on which the bag receiving hopper 74 stands.
  • the weighing device 76 or 112 itself or the control device 3 connected thereto may be designed in addition to or instead of acoustic and / or optical signals to generate control signals for controlling the powder feed in the measurement of predetermined weight values in dependence on the measured powder weight.
  • a signal may serve as an advance warning to an operator that the powder bag 12 is soon empty and needs to be replaced.
  • such a signal can serve, for example, to stop the fresh powder delivery from the powder bag 12 and instead supply recovery powder from the formed as a reservoir lower end portion 48-2 of the cyclone 48 of the screening device 10, if a local sensor S3 or S4, in the case of Presence of two sensors, for example, the upper sensor S3, the controller 3 indicates that sufficient recovery powder in the reservoir 48-2 of the cyclone 48 is present and provided that the sensor S1 of the intermediate container 24 the control unit 3 sends a demand signal.
  • the bag receiving hopper 74 may be provided with one or more vibrators 78 for vibrating the bag receiving hopper 74 to shake off coating powder from the bag wall and to promote slippage of coating powder in the powder bag as the amount of powder decreases.
  • FIGS. 2 and 3 show an opening edge holder 116 having an outer holding part 116-1 for gripping around the upper sack end portion 118 near its opening edge and an inner holding part 116-2 for insertion into the upper sack end portion 118 near its opening edge.
  • the two holding parts 116-1 and 116-2 are preferably clamped against each other for clamping the upper sack end portion 118 between them.
  • the inner holding part 116 - 2 may be provided with a through hole 120 from top to bottom for passing the powder conveying tube 70.
  • the opening edge holder 116 is preferably designed as a guide for guiding the movement of the powder delivery tube 70 in the tube longitudinal direction.
  • the opening edge holder 116 may be arranged stationary. However, it is preferably with a height adjustment device 122, which is preferably an automatically controllable lifting device, mechanically connected and movable by this height adjustment device 122 and down.
  • a height adjustment device 122 which is preferably an automatically controllable lifting device, mechanically connected and movable by this height adjustment device 122 and down.
  • the powder delivery tube 70 is arranged movable up and down, preferably vertically, preferably freely movable, so that it can submerge by gravity into the powder bag 12 and can follow the level of the coating powder downwards.
  • a height adjustment device 124 preferably an automatically controllable lifting device, and to move it up and down by means of this height adjustment device 124.
  • the two height adjustment devices 124 and 122 are arranged on a preferably vertically arranged guide rod 125 and at this preferably vertically adjustable.
  • the bag receiving hopper 74, the weighing device 76 or 112 and the guide device 125, 122, 124 are preferably arranged on a base plate 121.
  • the base plate 121 may be provided with wheels 123 for driving.
  • an opening edge holder 126 which has an outer holder portion 126-1 for gripping the upper sack end portion 118 near its opening edge and an inner holding portion for insertion into the upper sack end portion near its opening edge, wherein the inner holding portion is formed by the powder delivery tube 70 and the outer holding part 126-1 can be clamped radially against the powder conveying tube 70 or an intermediate element arranged therebetween.
  • the powder delivery tube 70 extends from top to bottom, preferably vertically.
  • the opening edge holder 126 of 4 and 5 may be attached to a carrier device, e.g. B. a rod 125, be arranged stationarily. However, it is preferably with a height adjustment device 128, preferably an automatically controllable lifting device, mechanically connected and from this height adjustment z. B. on a guide rod 125 up and down movable.
  • a carrier device e.g. B. a rod 125
  • a height adjustment device 128 preferably an automatically controllable lifting device, mechanically connected and from this height adjustment z. B. on a guide rod 125 up and down movable.
  • the powder delivery tube 70 is directed in all embodiments of the invention with its lower tube end preferably towards the lower funnel end and movable with its lower tube end down to the lower funnel end or to the vicinity of the lower funnel end, thus also from the lowermost end of the powder coating powder coating can be sucked off.
  • the powder tube 70 is arranged in the funnel center line in the longitudinal direction of the funnel center line and movable up and down.
  • the upper bag end is by means of the opening edge holder 116 of FIGS. 2 and 3 or 126 of the 4 and 5 preferably closed, so that no powder particles of the coating powder can escape from the powder bag into the outside atmosphere.
  • a pressure compensation opening 130 may be provided for venting and / or venting the powder bag 12.
  • the pressure compensation opening 130 may be formed for example in the inner part of the opening edge holder, for example in the inner part 116-2 of Fig. 2 , However, such a pressure compensation opening can also be in one with the Powder conveyor tube 70 connected element or be formed at another point of the powder bag or a powder pump.
  • the powder pump 4 of the fresh powder supply line 16 is arranged at the upper end of the powder delivery tube 70.
  • the powder pump can be any known type of pump.
  • the powder delivery tube 70 may be a single powder tube or a plurality of powder tubes.
  • Fig. 6 shows a preferred embodiment in which two tubes are arranged inside each other with a radial distance and connected to a double tube unit with each other.
  • the double tube contains inside the powder delivery tube 70 and radially outwardly a fluidizing air tube 132 for supplying fluidizing compressed air from a compressed air source 6 via a pressure regulator 8 to the lower tube end, where the fluidizing air 134 (FIG. Fig. 2 ) and where the coating powder 135 fluidizes there; in other words, brings into a floating state in the fluidizing compressed air, so that it is easier to be pneumatically conveyed by the powder delivery pipe 70 by means of the powder pump 4th
  • the powder pump 4 for the fresh powder from the powder bag 12 may be arranged in the fresh powder line 16 or according to the preferred embodiment at the upper end of the powder delivery tube 70, as for example in Fig. 6 shown by the example of an injector.
  • the injector 4 is supplied from the compressed air source 6 via a pressure regulator 8 conveying compressed air, which generates a negative pressure in the injector 4, through which coating powder 135 is sucked out of the powder bag 12 through the powder delivery tube 70 therethrough.
  • additional compressed air of the compressed air source 6 via a further compressed air regulator 8 in the end of the injector or the beginning can flow the fresh powder feed line 16 are supplied.
  • the Fig. 2 to 5 show the possibility to put a powder bag 12 vertically in the bag receiving hopper 74.
  • the FIGS. 7 and 8 show the possibility to set a powder bag obliquely on the inner surface of the bag receiving hopper 74. Further shows Fig. 7 The two possibilities of arranging the powder delivery tube 70 in an oblique sack in the funnel center line 108 in the longitudinal direction of the funnel center line 108 or arranging it parallel to the funnel inner surface and according to a double arrow 140 or 142 towards the lower funnel end to move upwards.
  • the bag receiving hopper 74 is provided at its lower end with a hopper opening 144 facing down. From this lower funnel opening 144 coating powder can fall out, which accidentally passes out of the powder bag in the bag receiving hopper 74. Furthermore, the lower hopper opening 144 also offers the possibility of opening the powder bag located in the bag receiving hopper 74 at a deepest bag location, for example piercing or cutting off a downwardly protruding bag hook in order to remove coating powder, in particular residual powder downwards.
  • the bag receiving hopper 74 has a substantially smaller diameter below the powder bag 12.
  • the upper hopper end has a diameter which is at least as large as the powder bag 12.
  • the internal cross-sectional size of the bag picking hopper 74 at right angles to the hopper centerline 108 is much smaller at the lower hopper end than at the upper hopper end Funnel end, and is preferably 50 percent or less, preferably 25 percent or less, more preferably 10 percent or less of the size at the top, at the bottom funnel end.
  • the bag receiving hopper 74 is preferably consistently conical and circular throughout its height. Instead of a circular shape, other shapes are possible, for example, oval or angular. At the lower and / or upper end of the bag receiving hopper 74 may have a non-tapered portion.
  • the suitable frequency of the vibrator 78 for the bag receiving hopper 74 and the vibrator 11 of the screening device 10 can be determined by experiments.
  • mechanical vibrators achieve a vibration frequency of 120 Hz.
  • Pneumatic vibrators achieve, for example, a vibration frequency of 18 kHz.
  • Ultrasonic vibrators achieve, for example, a vibration frequency of 34 kHz.
  • Fig. 9 shows a preferred embodiment of the invention.
  • the bag receiving hopper 74 is supported by a pivot arm 200 which is pivotable on the guide rod 125 about a vertical axis.
  • the pivot arm 200 is independent and thus pivotable relative to the opening edge holder 116 together with the bag receiving hopper 74.
  • the bag receiving hopper 74 under the opening edge holder 116 and out of the area of the powder delivery tube 70, when the powder delivery tube 70 is not immersed in the bag receiving hopper 74, laterally pivoted away and in a laterally offset from the opening edge holder 116 and the powder delivery tube 70 position be loaded with a powder bag.
  • the pivot arm 200 vertically adjustable.
  • the bag receiving hopper 74 is not supported by a pivot arm 200, but it is arranged on a carriage or carriage, not shown, and together with this laterally from the area of the powder delivery tube 70 and the region of the opening edge holder 116 moved out to load and unload the bag receiving hopper 74 with a or from a powder bag 12th
  • the powder pump 4 of the fresh powder line 16 is an injector or preferably a compressed air push pump (plug conveying pump) and is disposed at the upper end of the powder conveying tube 70.
  • the powder delivery tube 70 is arranged vertically freely movable together with the powder pump 4 of the fresh powder line 16, preferably also together with a Fluidisier Kunststoffrohr 132, so that this unit through Their weight by gravity can automatically follow the powder level in the powder bag.
  • a balance or at least one of the load cells 76-1, 76-2 and 76-3 may be disposed between the bag receiving hopper 74 and the swing arm 200, or between the swing arm 200 and the guide bar 125 or below the guide bar 125.
  • a visual weight indication or other weight signal from the scale 112 or the load cells 76-1, 76-2 and 76-3 can be set to zero in all embodiments of the invention when the bag receptacle 74 is empty if it does not contain powder bag 12 with coating powder and tared by it. Thereafter, when the bag picking device 74 is loaded with a powder bag 12, the weight indicator or weight signal of the scale or load cells indicates only the weight of the powder bag 12, but not the weight of the bag picking device 74.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Coating Apparatus (AREA)
  • Nozzles (AREA)
  • Fertilizing (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)

Claims (16)

  1. Dispositif de vidange pour sacs de poudre pour installations de revêtement par pulvérisation de poudre, contenant
    une trémie de réception de sacs (74) qui est plus étroite en bas qu'en haut, pour recevoir un sac de poudre (12), de sorte que la paroi de la trémie maintienne le sac dans une position et une forme stables, dans lesquelles l'ouverture du sac est à l'extrémité supérieure du sac ;
    caractérisé en ce que
    la trémie de réception de sacs (74) présente, à l'extrémité inférieure de la trémie, au centre de la trémie, une ouverture de trémie ouverte vers le bas (144), à travers laquelle la poudre de revêtement peut tomber, et
    en ce que la trémie de réception de sacs (74) est pourvue d'au moins un vibrateur (78) pour faire vibrer la trémie de réception de sacs (74).
  2. Dispositif de vidange selon la revendication 1,
    caractérisé en ce que
    l'angle de trémie (α) de la surface intérieure de la trémie est compris entre 45° et 90°, et de préférence entre 50° et 70°.
  3. Dispositif de vidange selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'axe médian de trémie (108) de la trémie de réception de sacs (74) s'étend verticalement.
  4. Dispositif de vidange selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la trémie de réception de sacs (74) est disposée sur au moins un capteur de poids (76 ; 112) pour mesurer le poids de la trémie de réception de sacs (74) y compris son contenu.
  5. Dispositif de vidange selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'au moins un capteur de poids (76 ; 112) est raccordé à un appareil de signaux (3) qui produit un signal en fonction du poids mesuré, un signal étant de préférence alors produit au moins lorsqu'un poids minimum prédéterminé est atteint ou n'est pas atteint.
  6. Dispositif de vidange selon l'une quelconque des revendications précédentes,
    caractérisé par
    un support de bord d'ouverture (116), qui présente une partie de support extérieure (116-1) pour venir en prise circonférentiellement avec la portion d'extrémité de sac supérieure (118) à proximité d'un bord d'ouverture de l'ouverture du sac (106) et une partie de support intérieure (116-2) devant être insérée dans la portion d'extrémité de sac supérieure (118) à proximité de son bord d'ouverture, les deux parties de support (116-1, 116-2) pouvant être serrées l'une contre l'autre pour serrer la portion d'extrémité de sac supérieure (118) entre elles, la partie de support intérieure (116-2) présentant une ouverture de passage (120) de haut en bas pour le passage d'un tube d'alimentation en poudre (70).
  7. Dispositif de vidange selon la revendication 6,
    caractérisé en ce que
    le support du bord d'ouverture (116) est connecté mécaniquement à un dispositif de réglage en hauteur (122), de préférence un dispositif de levage pouvant être actionné automatiquement, et peut être déplacé de haut en bas par ce dispositif de réglage en hauteur.
  8. Dispositif de vidange selon la revendication 6 ou 7,
    caractérisé en ce que
    le tube d'alimentation en poudre (70) est connecté mécaniquement à un dispositif de réglage en hauteur (124), de préférence un dispositif de levage pouvant être actionné automatiquement, et peut être déplacé de haut en bas par ce dispositif de réglage en hauteur.
  9. Dispositif de vidange selon l'une quelconque des revendications 1 à 5,
    caractérisé par
    un support de bord d'ouverture (126) qui présente une partie de support extérieure (126-1) pour venir en prise circonférentiellement avec la portion d'extrémité de sac supérieure (118) à proximité d'un bord d'ouverture de l'ouverture du sac (106) et une partie de support intérieure (70) devant être insérée dans la portion d'extrémité de sac supérieure à proximité de son bord d'ouverture, les deux parties de support pouvant être serrées l'une contre l'autre pour serrer la portion d'extrémité de sac supérieure entre elles, et la partie de support intérieure étant un tube d'alimentation en poudre (70) ou un tube (132) contenant un tube d'alimentation en poudre (70), qui peut être inséré de haut en bas à travers l'ouverture de sac (106) dans le sac de poudre qui se trouve dans la trémie de réception de sacs (74).
  10. Dispositif de vidange selon la revendication 9,
    caractérisé en ce que
    le support de bord d'ouverture (126) est connecté mécaniquement à un dispositif de réglage en hauteur (128), de préférence un dispositif de levage commandable automatiquement, et peut être déplacé de haut en bas par le dispositif de réglage en hauteur.
  11. Dispositif de vidange selon l'une quelconque des revendications 6 à 10,
    caractérisé en ce que
    le tube d'alimentation en poudre (70) est orienté avec son extrémité de tube inférieure dans la direction de l'extrémité de trémie inférieure, et en ce que le tube de poudre est disposé, avec son extrémité de tube inférieure, de manière déplaçable vers le bas jusqu'à l'extrémité inférieure de la trémie ou jusqu'à proximité de l'extrémité inférieure de la trémie.
  12. Dispositif de vidange selon l'une quelconque des revendications 6 à 11,
    caractérisé en ce que
    le tube d'alimentation en poudre (70) est disposé dans l'axe médian de la trémie (108) dans la direction longitudinale de l'axe médian de la trémie, et peut être déplacé dans cette direction longitudinale.
  13. Dispositif de vidange selon l'une quelconque des revendications 6 à 11,
    caractérisé en ce que
    le tube d'alimentation en poudre (70) est disposé parallèlement à la surface interne de la trémie de réception de sacs et peut être déplacé parallèlement à la surface interne de la trémie de haut en bas.
  14. Dispositif de vidange selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la dimension intérieure en section transversale de la trémie de réception de sacs (74) à angle droit par rapport à l'axe médian de la trémie (108) à l'extrémité inférieure de la trémie est considérablement plus petite qu'à l'extrémité supérieure de la trémie et à l'extrémité inférieure de la trémie, vaut 50 pour cent ou moins, de préférence 25 pour cent ou moins, et plus préférablement 10 pour cent ou moins, de la dimension à l'extrémité supérieure.
  15. Dispositif de vidange selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'une pompe à poudre (4), de préférence sous forme d'un injecteur, est disposée à l'extrémité supérieure du tube d'alimentation en poudre (70).
  16. Dispositif de vidange selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la trémie de réception de sacs (74) est disposée de manière déplaçable dans la direction latérale dans différentes positions, de préférence de manière à pouvoir pivoter autour d'un axe vertical (125).
EP07120891A 2007-02-02 2007-11-16 Dispositif de vidange pour sacs de poudre pour installations de revêtement par poudre vaporisée Active EP1953098B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007005307A DE102007005307A1 (de) 2007-02-02 2007-02-02 Entleervorrichtung für Pulversäcke für Pulversprühbeschichtungsanlagen

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EP1953098A1 EP1953098A1 (fr) 2008-08-06
EP1953098B1 true EP1953098B1 (fr) 2009-04-15

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US (2) US20080187423A1 (fr)
EP (1) EP1953098B1 (fr)
AT (1) ATE428662T1 (fr)
DE (2) DE102007005307A1 (fr)
PT (1) PT1953098E (fr)
WO (1) WO2008093179A1 (fr)

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Also Published As

Publication number Publication date
US20120009046A1 (en) 2012-01-12
EP1953098A1 (fr) 2008-08-06
ATE428662T1 (de) 2009-05-15
DE102007005307A1 (de) 2008-08-07
WO2008093179A1 (fr) 2008-08-07
PT1953098E (pt) 2009-06-24
DE502007000614D1 (de) 2009-05-28
US20080187423A1 (en) 2008-08-07

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