EP3337621B1 - Verfahren zur konservierung von hohlräumen - Google Patents

Verfahren zur konservierung von hohlräumen Download PDF

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Publication number
EP3337621B1
EP3337621B1 EP16762953.4A EP16762953A EP3337621B1 EP 3337621 B1 EP3337621 B1 EP 3337621B1 EP 16762953 A EP16762953 A EP 16762953A EP 3337621 B1 EP3337621 B1 EP 3337621B1
Authority
EP
European Patent Office
Prior art keywords
wax
pressure
atomization
cavities
air
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
EP16762953.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3337621A1 (de
Inventor
Roman ERBAN
Pavel STRYNCL
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.)
Skoda Auto AS
Original Assignee
Skoda Auto AS
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Filing date
Publication date
Application filed by Skoda Auto AS filed Critical Skoda Auto AS
Publication of EP3337621A1 publication Critical patent/EP3337621A1/de
Application granted granted Critical
Publication of EP3337621B1 publication Critical patent/EP3337621B1/de
Active 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
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
    • B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies
    • 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
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes

Definitions

  • the invention relates to the method for serial cavity preservation of cavities in a vehicle body.
  • the flooding method is currently used for the preservation of cavities in a vehicle body.
  • the bodies are mechanically arranged on the flood frame in such a way that the spray nozzles of the flood frame are inserted into the technological openings in the cavities on the vehicle underbody.
  • the cavities in the body are flooded with a large to excess amount of the preservation wax using a pressure pump in order to achieve the specified coating thickness of the interior walls of the cavities in the body underbody.
  • the excess preservation wax then flows spontaneously from the cavities in the body to the heated plates of the system and is recycled for further use by heating to a temperature of 115 ° C.
  • a disadvantage of this method is that the system for cavity flooding with wax works according to the principle of an unnecessary coating thickness of the preservation wax on the inner walls (at least 1000 ⁇ m).
  • the spontaneous outflow of excess wax after ascending into the body cavities causes permanent soiling of the mounting surfaces of the undercarriage parts with the risk of unstable tightening torques.
  • the system for preserving the cavities and the storage containers must be continuously heated to the temperature of 115-120 ° C, which results in considerable energy consumption.
  • the flood system is very expensive to invest. For paint shops with a daily capacity of 150 - 200 or up to 600 bodies a day is an unprofitable preservation process.
  • wax is applied to the inner walls of the cavity to be preserved using application nozzles.
  • the wax is heated to a temperature between 80 ° C and 140 ° C and the liquefied wax is pressurized between 40 and 150 bar.
  • Compressed air is fed to the nozzle at a pressure between 0.5 and 5 via an air supply pipe. The compressed air helps the wax to escape from the nozzle opening.
  • the coating device for applying a corrosion protection agent, such as a wax, to a component of a motor vehicle.
  • the coating device has an atomizer with a first inlet, through which the wax can enter the atomizer.
  • the inlet is coupled to a feed line through which the wax, which is under high pressure, flows.
  • the pressure can be 130 bar.
  • Compressed air enters a first atomization chamber of the atomizer via a second inlet.
  • the compressed air is fed to the atomizer via a line, wherein a pressure of, for example, 6 bar can be provided when applying the wax under high pressure.
  • the arrangement comprises a spray nozzle with a controllable shut-off valve, a feed line in which pressurized liquid coating material (wax) is conveyed and a control device which is set up to open and close the shut-off valve.
  • a spray nozzle with a controllable shut-off valve
  • a feed line in which pressurized liquid coating material (wax) is conveyed
  • a control device which is set up to open and close the shut-off valve.
  • the coating material is swirled using compressed air.
  • the compressed air is delivered at about 3 to 6 bar and the coating material at a pressure of over 100 bar.
  • the object is achieved by the method according to the invention.
  • manual or robotic preservation is advantageously used, in which the preservation wax is applied to the interior walls of the body cavities using a spray tool with a nozzle and spray head.
  • the interior walls of the body cavities are coated by atomizing a mixture of the preserving wax, with pressure in the three-digit bar range, and the air, with pressure in the single-digit bar range, the coating cycle being carried out in sequences by atomizing the preserving wax.
  • the coating of the inner walls of the underbody cavities can be adjusted to a thickness of 30 - 200 ⁇ m by optimizing the wax dosage.
  • the duration of the individual sequences in the course of a coating cycle by atomizing the preservation wax is tenths of a second, the first sequence starting at the time 0 seconds.
  • the coating according to the invention by the atomization process requires an environment in the spray room with a minimum temperature of 20 to 22 ° C.
  • the preservation wax requires so-called abrupt heating of the body cavities to 60 ° C.
  • the procedure does not require cleaning the mounting surfaces of the undercarriage parts.
  • the high-pressure spraying process with a fine mist mixture of the preservation wax, with pressure in the three-digit bar range, and the air, with pressure in the single-digit bar range, eliminates possible errors of the employees in the manual and robotic coating processes by the principle of the cycles of atomization sequences.
  • the process can be done manually or be carried out robotically under the conditions of mass production of bodies.
  • FIG. 1 the view of the spray tool with a nozzle and spray head
  • the Fig. 2 the timing diagram of the spray cycle
  • the 3 to 8 the individual sequences of atomization of the mixture of the preservation wax and air in individual time periods: Fig. 3 0.0 seconds, Fig. 4 0.1 second, Fig. 5 0.4 seconds, Fig. 6 0.5 seconds, Fig. 7 0.6 seconds, Fig. 8 1.1 Seconds that Fig. 9 and 10th different forms of atomization of the fine mist mixture from the preservation wax and air depending on the shape and type of the spray head: the Fig. 9 the nozzle with atomization in the longitudinal direction, the Fig. 10 the nozzle with atomization in the transverse direction.
  • the Fig. 1 shows the device for performing the submitted new method of cavity preservation in series production.
  • the spraying tool 1 comprises a nozzle 2 , formed by a nozzle arm 3 and a 360 ° spray head 4 , a trigger blade 10 , a compressed air supply line 100 , a supply line for the preservation wax 101 , a pressure valve, a mixing device and a metering device 20 for the preservation wax.
  • the spraying tool 1 is operated manually by means of a trigger tongue 10 .
  • the spraying tool 1 can also be operated by the robot. In the present case, the spraying tool 1 is actuated or activated by the robot.
  • the interior walls of the body cavities are atomized by atomizing the mixture of the preservation wax, with pressure in the three-digit bar range, and the air , coated with pressure in the single-digit bar range, the coating cycle being carried out in sequences by atomizing 200 of the preservation wax.
  • the duration of individual sequences is given in this case as an illustrative example. As can be seen, the duration of the individual sequences moves in tenths of a second, the first sequence starting at the time 0 seconds.
  • the pressure of the air and of the preservation wax is constant during the entire period of cavity preservation of the vehicle body, these constant values being set at the start of the process of cavity preservation of the vehicle or of an entire vehicle group.
  • the interior walls of the body cavities are coated by atomizing a mixture of the preservation wax, with pressure in the three-digit bar range, and the air, with pressure in the single-digit bar range.
  • the pressure of the air of 7 bar and the wax of 120 bar or even up to 200 bar can be given.
  • the determination of the optimal pressures and the duration of the intervals or sequences of a coating cycle by atomizing the preservation wax depends on the required consistency of the mist mixture of wax and air. Different pressures result in different fog densities of the mixture of wax and air, but the principle of coating the cavity walls remains the same.
  • the pressure values and sequence duration specified in the description of the design should be regarded as recommendations in order to maintain the process safety and economy of cavity preservation of the bodies by means of an "explosion" of the mixture of air and preservation wax.
  • the "explosion” of very fine drops of the preservation wax under the conditions of the recommended values more reliably fulfills the task of economical and reliable preservation of the body cavities.
  • the individual sequences are in 3 to 8 shown.
  • the Fig. 2 shows the time diagram of the coating cycle, that is the time-dependent course of the pressure of the preservation wax and the air in the nozzle 2 .
  • the spraying process takes place at temperatures around 20 ° to 22 ° C.
  • the layer thickness of the preservation wax on the inner walls of the cavities in the body is between 30 and 200 ⁇ m.
  • the Fig. 9 and 10th show different forms of mist atomization 200 of the mixture of wax and air depending on the shape and type of the spray head 4 of the nozzle 2 .
  • the Fig. 9 shows a nozzle 2 with the atomization 200 in the longitudinal direction
  • the Fig. 10 a nozzle 2 with atomization 200 in the transverse direction.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP16762953.4A 2015-08-20 2016-08-12 Verfahren zur konservierung von hohlräumen Active EP3337621B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ2015-560A CZ2015560A3 (cs) 2015-08-20 2015-08-20 Postup konzervace dutin
PCT/CZ2016/000089 WO2017028825A1 (de) 2015-08-20 2016-08-12 Verfahren zur konservierung von hohlräumen

Publications (2)

Publication Number Publication Date
EP3337621A1 EP3337621A1 (de) 2018-06-27
EP3337621B1 true EP3337621B1 (de) 2020-03-11

Family

ID=56888874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16762953.4A Active EP3337621B1 (de) 2015-08-20 2016-08-12 Verfahren zur konservierung von hohlräumen

Country Status (3)

Country Link
EP (1) EP3337621B1 (cs)
CZ (1) CZ2015560A3 (cs)
WO (1) WO2017028825A1 (cs)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU188724U1 (ru) * 2018-10-05 2019-04-22 Федеральное государственное бюджетное образовательное учреждение высшего образования "Рязанский государственный агротехнологический университет имени П.А. Костычева" (ФГБОУ ВО РГАТУ) Пистолет для консервации сельскохозяйственной техники
CN111906008A (zh) * 2019-06-13 2020-11-10 中车大同电力机车有限公司 车体中封闭型腔体的防腐处理方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3004495A1 (de) * 1980-02-07 1981-08-13 Daimler-Benz Ag, 7000 Stuttgart Anordnung zum innenbeschichten von hohlraeumen
DE3910179C1 (cs) * 1989-03-29 1990-03-29 J. Wagner Gmbh, 7990 Friedrichshafen, De
DE102011109045A1 (de) * 2011-07-30 2012-03-15 Daimler Ag Beschichtungseinrichtung, Verfahren zum Betreiben einer Beschichtunseinrichtung und Verfahren zum Aufbringen eines Korrosionsschutzmittels auf ein Bauteil eines Kraftwagens ...

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* Cited by examiner, † Cited by third party
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None *

Also Published As

Publication number Publication date
WO2017028825A1 (de) 2017-02-23
EP3337621A1 (de) 2018-06-27
CZ2015560A3 (cs) 2017-03-01

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