EP0631823A1 - Appareil de pulvérisation à haute pression pour cire solide - Google Patents

Appareil de pulvérisation à haute pression pour cire solide Download PDF

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Publication number
EP0631823A1
EP0631823A1 EP94109375A EP94109375A EP0631823A1 EP 0631823 A1 EP0631823 A1 EP 0631823A1 EP 94109375 A EP94109375 A EP 94109375A EP 94109375 A EP94109375 A EP 94109375A EP 0631823 A1 EP0631823 A1 EP 0631823A1
Authority
EP
European Patent Office
Prior art keywords
wax
pump
pressure
spraying
filling container
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.)
Withdrawn
Application number
EP94109375A
Other languages
German (de)
English (en)
Inventor
Martin Borer
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.)
ESTA AG
Original Assignee
ESTA AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ESTA AG filed Critical ESTA AG
Publication of EP0631823A1 publication Critical patent/EP0631823A1/fr
Withdrawn legal-status Critical Current

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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
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/002—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour incorporating means for heating or cooling, e.g. the material to be sprayed
    • 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
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/10—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to temperature or viscosity of liquid or other fluent material discharged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/58—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter preventing deposits, drying-out or blockage by recirculating the fluid to be sprayed from upstream of the discharge opening back to the supplying means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material

Definitions

  • the invention relates to a device according to claim 1.
  • Hard wax is increasingly being used to impregnate wooden surfaces, especially in furniture.
  • the waxes used are solvent-free and their composition is adapted to the function of the surface being treated. It has been shown that even with natural components such as linseed oil, wood oil, natural resin, beeswax and carnauba wax, optimal impregnation can be achieved without harmful solvents.
  • the wax is applied to the surface using a hot spray process.
  • the known devices for hot spraying hard wax heat the wax to approximately 60 ° C.
  • the wax is liquefied by the heating.
  • the liquid hard wax is continuously circulated between the pump and the spray gun in a preheated circulation loop and heated in a continuous-flow heater so that the wax and the lines of the circulation loop are kept at a temperature at which the wax is liquid.
  • the circulation loop comprises two pressure-resistant lines, one leading from the pressure side of the pump to a connector at the spray gun and the other from the connector to a container from which a suction line leads to the pump.
  • the connecting piece is essentially arranged as a T-piece in such a way that a portion of the circulation of the wax flowing in via the first line always flows back to the pump via the second line.
  • the amount of wax that emerges from the spray gun is significantly smaller than the amount of circulation, so that most of the funding is used to circulate the wax.
  • the wax can be sprayed airless.
  • the requirements for the tightness of the piping system with its connections are increased due to the high pressure.
  • the effort for the continuous-flow heater inserted into the wax line on the high-pressure side becomes very great.
  • solvent-containing substances may also be sprayed, the safety regulations for the preferably electric heater of the instantaneous water heater are extremely strict, so that correspondingly high production costs also arise.
  • the line system must be preheated during commissioning.
  • the lines are, for example, wrapped around a heat source and heated by contact heat, or a heated heating medium, preferably linseed oil, is circulated through the lines until they have the required temperature.
  • the heat medium is returned from a separate heatable container through the pump and the circulation lines to this container.
  • the suction and return lines from linseed oil must be changed to the wax container and vice versa. If necessary, the heat medium is filled into the wax container so that it is before filling the wax must be derived again.
  • the entire system must be flushed, preferably with linseed oil, at the end of a work cycle.
  • the wax circulation with sometimes very long residence times of circulating wax components is not suitable.
  • the circulation is also not a good solution in terms of energy technology, because the majority of the promotion only serves the circulation and because heat is emitted along the entire circulation path, which must be continuously introduced by the instantaneous water heater.
  • the heat input required to compensate for the heat losses depends on the temperature of the ambient air, so that when working in cold outside air, the heating output has to be adjusted, otherwise hardening problems can be expected.
  • the delivery rate of the pump In order to maintain the circulation, the delivery rate of the pump must be significantly greater than the desired spray rate or the spray rate of the spray gun. Such an oversized pump leads to an increase in device costs.
  • the object of the invention is now to describe a spraying device which is simple in construction and is user-friendly, which optimally converts the energy used into spraying power and can be produced at low cost.
  • the inventive solution for a hard wax spraying device is that a heatable filling container is connected directly to a high-pressure pump and a single pressure-resistant line leads from the pump to a spray nozzle device.
  • a first inventive step it had to be recognized that the prejudice that had long been widespread in the field of hard wax spraying that the wax in the pipe system between the pump and the spray nozzle was always liquid was not correct.
  • a second inventive step it was recognized that cold and thus solid, or at least viscous, hard wax can be conveyed through an unheated, cold delivery line at a sufficiently high delivery pressure and that even when it emerges from an airless nozzle due to the large pressure drop above the nozzle Spray jet is created.
  • the minimum pressures required for delivery and spraying are, depending on the desired delivery rate, on the required nozzle opening and on the line cross-section, at least 30 bar, optionally at least 50 bar, but preferably at least 70 to 80 bar.
  • a diaphragm pump in particular a pump with an electrically driven hydraulic piston, which drives the pump diaphragm via the hydraulic oil, is preferably used. If necessary, a piston pump can also be used advantageously.
  • the tests carried out have shown that it is possible to pump solid hard wax as long as there is liquid hard wax on the suction side of the pump.
  • an inlet container that can be heated, at least in its lower outlet area, is provided, which is connected to the pump at the shortest possible distance to the suction and pump element, preferably to the membrane, that is to say without a hose connection. If necessary, the liquefaction of the wax in the area between the filling tank and the pump element is stimulated in the connection area between the pump and the filling tank, at least via heat conduction, possibly also by a heating device arranged in this area.
  • the filling device attached to the pump and the use of only one line from the pump to the spray nozzle device give the spray device a simple structure. Since the heating device is arranged in the filling container and no longer on the high-pressure side of the pump, it can be made much simpler and cheaper.
  • the airless spraying process used does not require expensive compressed air and, without overspray, brings essentially all wax onto the surface to be processed.
  • the spraying process is also significantly simplified by the invention.
  • Lines must not be cleaned and / or heated before or after spraying.
  • the device can simply be switched off so that the wax in the pump, in the lines and in the filling container becomes hard.
  • the spraying process can begin. By omitting cleaning and heating rinses, no mixed products, such as linseed oil with wax, are required. Since no circulation has to be maintained, the entire energy is optimally converted into spraying power.
  • a high-pressure spraying device according to the invention can be put together for hard wax with minimal effort. If the heater remains off, the same device can also be used to spray paints and varnishes. So it is a universal spraying device. Thanks to the solution according to the invention, two devices, one for paints and lacquers and one for hard wax, can be dispensed with. All necessary spraying work can thus be made possible with the investment costs for just one device.
  • the inventive solution can also be expanded for use in automated production processes. If necessary, a nozzle system with several point and / or line nozzles is used instead of a point nozzle, which must be guided over the entire area to be sprayed.
  • a moving device can be used to move the pieces to be sprayed or to move the nozzle system.
  • a central control device can be used, which is also connected to the movement device and to the nozzle system, in particular to a closing and opening device of the same.
  • the heating device essentially comprises a heating device with a heating control which controls the respective heating power by means of at least one temperature value detected by at least one temperature sensor.
  • the heating control can be connected to the central control device so that, for example, the spraying process only begins when the required temperature has been reached.
  • the use of at least one liquid sensor preferably an optical, possibly also an acoustic measuring system, can also be provided, these measuring systems also being connected to the central control device.
  • the control device can start up a wax feed device if the level is too low.
  • the central control device is connected to the pump motor and on the high pressure side of the pump to a pressure sensor and an adjustable pressure control valve.
  • a suction flange 12 On the upper side of the pump part 1b there is a suction flange 12, to which the outlet opening of the filling container is attached. The outlet opening is attached to the lower end of the filling container 2. Also in the area of the lower end of the filling container 2 is a supply and control unit 13 for at least one heating device with at least one temperature sensor 14, which measures the temperature of the wax or a heating medium or a contact surface. The heating power is selected via the control device 13, depending on the current temperature, so that the wax reaches the desired temperature. At least one setting element 13a is optionally provided for preselecting a desired temperature or a temperature range. When using an electric pump motor 1a, it is preferably fed together with the heating device via a common connecting cable 15.
  • FIG. 2 shows a filling container 2 according to the invention in section and schematically the adjoining device parts.
  • a receiving space 16 into which the hard wax is filled.
  • the container 2 is at least partially constructed with double walls, so that an intermediate space 19 is formed between an outer 17 and an inner container wall 18, into which a heating medium, preferably thermal oil, can be filled.
  • a heating device 20 is preferably provided, which is arranged in particular in the lower end region of the container 2 in the intermediate space 19 and is fed by the feed and control device 13.
  • a temperature sensor 14 is preferably provided in the hissing space 19 in such a way that it detects the current temperature of the thermal oil.
  • the temperature sensor 14 is also fastened in the receiving space 16 or on the inner container wall 18.
  • the temperatures required to achieve the liquefaction depend on the composition of the hard wax and are between 40 ° C and 100 ° C, but preferably between 60 ° C and 80 ° C.
  • the heating power is optionally set by the control device 13 as a function of the difference between the desired and the current temperature.
  • the heating device 20, 13, 14 must ensure that the wax can be liquefied at least in the lower end region of the filling container 2 and in a suction region 21 of the pump 1 adjoining it. If necessary, a second heater, or a continuous-flow heater 22, which at least partially adjoins the suction area 21, is provided for this purpose.
  • the suction area 21 is preferably selected to be so short that the heating device 20 can also liquefy the wax in the suction area. If necessary, this can be better achieved in that a pipe surrounding the suction area has good thermal conductivity properties.
  • the embodiment according to FIG. 2 provides that an outlet opening 16a of the filling container 2 coincides with a suction opening 23a of the pump 1. When using a commercially available pump, make sure that the suction area 21 is as short as possible and that the wax is accessible from above. The liquid wax must be able to enter from above due to gravity.
  • a first check valve 24 is preferably arranged such that liquid is drawn in during suction Wax can flow from the suction area through the valve 24 against a movable pump element 25.
  • a movable pump element 25 moves against the first check valve 24
  • the latter is closed and the wax must escape through a pressure line 26 adjoining the suction area 21.
  • a second check valve 27 ensures that the wax can only enter the pressure line 26, but cannot flow back out of it.
  • an adjustable pressure control valve 28 is provided in the pressure line 26. The current pressure in the pressure line 26 is measured by a pressure gauge 29 connected to the pressure line 26.
  • an adjustable line switch is made between the pressure line 26 and the lines 3 and 9 30 installed.
  • the short-circuit line 9 can be used, for example, for emptying the filling container into another container.
  • a central control device 31 is also shown in FIG. 2. If necessary, this is connected to a part of the elements listed below.
  • the control device 31 is connected to the pump motor 1a, optionally with the adjustable pressure control valve 28 and with the pressure sensor 29, as well as with the spray gun 4 or a nozzle device.
  • the feed and control device 13 is connected to the central controller 31 so that, for example, the pump is only switched on when the desired temperature and the liquid state of the wax have been reached is.
  • a liquid sensor with an optical or acoustic measurement method is provided in the suction area 21 and connected to the controller 31.
  • At least one level sensor preferably a light barrier, could be provided, which would switch a wax feed device on and off via the controller 31, for example.
  • the movement device for the nozzle device or the pieces to be sprayed would also be connected to the central control.
  • the controller 31 could also switch the adjustable line switch 30.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Nozzles (AREA)
EP94109375A 1993-06-30 1994-06-17 Appareil de pulvérisation à haute pression pour cire solide Withdrawn EP0631823A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1954/93 1993-06-30
CH195493 1993-06-30

Publications (1)

Publication Number Publication Date
EP0631823A1 true EP0631823A1 (fr) 1995-01-04

Family

ID=4222479

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94109375A Withdrawn EP0631823A1 (fr) 1993-06-30 1994-06-17 Appareil de pulvérisation à haute pression pour cire solide

Country Status (2)

Country Link
EP (1) EP0631823A1 (fr)
DE (1) DE4323196A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103100498A (zh) * 2013-02-23 2013-05-15 安徽昊方机电股份有限公司 摆杆式旋转自动喷涂机
CN109304279A (zh) * 2018-12-04 2019-02-05 广州市通上德智能装备有限公司 一种定量灌蜡枪嘴

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1281897B1 (it) * 1995-04-13 1998-03-03 Fabio Mate Apparecchiatura capace di alimentare un ugello erogatore con un flusso continuo di cera fusa

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1457634A (en) * 1921-04-04 1923-06-05 Neri Manuel Huitron Device for spraying hot fluid substances
FR1035045A (fr) * 1951-04-04 1953-08-12 Applimo Soc Perfectionnements aux appareils pour projection de la peinture et liquides divers
US2727786A (en) * 1952-09-05 1955-12-20 James A Bede Paint heating and circulating system and spray device therefor
US2839332A (en) * 1953-06-23 1958-06-17 Frank G Sackett Means for applying a liquid material to a surface
FR1190780A (fr) * 1957-01-24 1959-10-15 Dispositif de chauffage de produits tels que peintures ou analogues vaporisés à chaud
CH382044A (de) * 1961-03-24 1964-09-15 Baiker Lambert Einrichtung zum Spritzen von unter Wärmeeinwirkung fliess- und spritzfähig gemachtem Spritzgut, wie Bitumen, Teeren, Kunststoffen usw.
FR2149686A5 (fr) * 1971-08-13 1973-03-30 Banchini Auguste
US4387851A (en) * 1981-05-18 1983-06-14 Dick Edward R Apparatus for heating and spraying viscous coating material
US4437581A (en) * 1981-11-27 1984-03-20 Nordson Corporation Pump motor master control
DE8507105U1 (de) * 1985-03-12 1985-05-02 Planatolwerk Willy Hesselmann Chemische und Maschinenfabrik für Klebetechnik GmbH & Co KG, 8201 Rohrdorf Klebstoff-Auftragevorrichtung
DE9213428U1 (fr) * 1992-10-06 1992-12-10 H. Hermann Rotert Inh. Karl-Ernst Bohn, 4500 Osnabrueck, De
DE9301296U1 (fr) * 1993-02-01 1993-03-18 Wiwa Wilhelm Wagner Gmbh & Co Kg, 6335 Lahnau, De

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
DE2354105B2 (de) * 1973-10-29 1976-12-30 Wilhelm Fleissner KG, 7110 Öhringen Verfahren und vorrichtung zum luftlosen aufspritzen fliessbarer stoffe
US4462547A (en) * 1977-10-21 1984-07-31 Baltimore Paint & Chemical Co., A Division Of Dutch Boy, Inc. Method of applying marking lines to a road surface
DE2748234A1 (de) * 1977-10-27 1979-05-03 Armin Kuendig Vorrichtung zum spritzen eines erwaermten spritzgutes
DE3416899A1 (de) * 1984-05-08 1985-11-21 Morinaga Machinery Co., Ltd., Yokohama Dekoriermaschine
FR2577816A1 (fr) * 1985-02-28 1986-08-29 Skid Sa Procede et dispositif pour le fartage de skis par pulverisation
DE3910179C1 (fr) * 1989-03-29 1990-03-29 J. Wagner Gmbh, 7990 Friedrichshafen, De
DE9106044U1 (fr) * 1991-05-16 1991-07-04 Boellhoff Verfahrenstechnik Gmbh & Co Kg, 4800 Bielefeld, De
DE4119907A1 (de) * 1991-06-17 1992-12-24 Juergen Dr Ing Spillecke Tansportables, kompaktes pumpenaggregat

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1457634A (en) * 1921-04-04 1923-06-05 Neri Manuel Huitron Device for spraying hot fluid substances
FR1035045A (fr) * 1951-04-04 1953-08-12 Applimo Soc Perfectionnements aux appareils pour projection de la peinture et liquides divers
US2727786A (en) * 1952-09-05 1955-12-20 James A Bede Paint heating and circulating system and spray device therefor
US2839332A (en) * 1953-06-23 1958-06-17 Frank G Sackett Means for applying a liquid material to a surface
FR1190780A (fr) * 1957-01-24 1959-10-15 Dispositif de chauffage de produits tels que peintures ou analogues vaporisés à chaud
CH382044A (de) * 1961-03-24 1964-09-15 Baiker Lambert Einrichtung zum Spritzen von unter Wärmeeinwirkung fliess- und spritzfähig gemachtem Spritzgut, wie Bitumen, Teeren, Kunststoffen usw.
FR2149686A5 (fr) * 1971-08-13 1973-03-30 Banchini Auguste
US4387851A (en) * 1981-05-18 1983-06-14 Dick Edward R Apparatus for heating and spraying viscous coating material
US4437581A (en) * 1981-11-27 1984-03-20 Nordson Corporation Pump motor master control
DE8507105U1 (de) * 1985-03-12 1985-05-02 Planatolwerk Willy Hesselmann Chemische und Maschinenfabrik für Klebetechnik GmbH & Co KG, 8201 Rohrdorf Klebstoff-Auftragevorrichtung
DE9213428U1 (fr) * 1992-10-06 1992-12-10 H. Hermann Rotert Inh. Karl-Ernst Bohn, 4500 Osnabrueck, De
DE9301296U1 (fr) * 1993-02-01 1993-03-18 Wiwa Wilhelm Wagner Gmbh & Co Kg, 6335 Lahnau, De

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103100498A (zh) * 2013-02-23 2013-05-15 安徽昊方机电股份有限公司 摆杆式旋转自动喷涂机
CN103100498B (zh) * 2013-02-23 2015-05-20 安徽昊方机电股份有限公司 摆杆式旋转自动喷涂机
CN109304279A (zh) * 2018-12-04 2019-02-05 广州市通上德智能装备有限公司 一种定量灌蜡枪嘴

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Publication number Publication date
DE4323196A1 (de) 1995-01-12

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