EP0603456B1 - Verfahren, Vorrichtung und Beschichtungsmaterial zum Dosennahtbeschichten - Google Patents

Verfahren, Vorrichtung und Beschichtungsmaterial zum Dosennahtbeschichten Download PDF

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Publication number
EP0603456B1
EP0603456B1 EP93106383A EP93106383A EP0603456B1 EP 0603456 B1 EP0603456 B1 EP 0603456B1 EP 93106383 A EP93106383 A EP 93106383A EP 93106383 A EP93106383 A EP 93106383A EP 0603456 B1 EP0603456 B1 EP 0603456B1
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EP
European Patent Office
Prior art keywords
coating
coating material
reservoir
applicator
hot
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.)
Expired - Lifetime
Application number
EP93106383A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0603456A1 (de
Inventor
Alfonso D'aniello
Gideon Dr. Levy
Matthias Frei
Hans-Jürg Nussbaumer
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.)
Elpatronic AG
Original Assignee
Elpatronic 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 Elpatronic AG filed Critical Elpatronic AG
Publication of EP0603456A1 publication Critical patent/EP0603456A1/de
Application granted granted Critical
Publication of EP0603456B1 publication Critical patent/EP0603456B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B05D7/222—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 of pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C7/00—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work

Definitions

  • the present invention relates to a method and an apparatus the steps indicated in the preamble of claim 1 and the features specified in the preamble of claims 5.
  • a such a method and such an apparatus are known from the US-A-3 077 171.
  • Metal sheets are welded together to form individual pieces with different alloy and / or e.g. of different thicknesses new board to form which sections with different Has material properties. Will such a new, compound
  • the sheet of metal then drawn from animals creates a spatial one Structure with (due to the different material properties) predetermined, changing properties across the dimension. In this way e.g. Beams manufactured in the automotive industry, which show defined properties in the event of a crash and So the basis for the desired training are Crumple zone.
  • Car tanks are e.g. from deep-drawn, superimposed Halves formed by welding along the edge areas.
  • Weld seams will no longer be in one Level, but to complete the spatial conditions during installation to be able to use, will be three-dimensional.
  • Metal sheets which are intended to metal containers, such as for example metal cans or food cans, processed to are first coated on that side or painted, which is intended to the interior of the container to build. These metal sheets are then used, for example bent or folded to form the container. The respective End edges of the bent or folded metal sheets are put together and for example by means of a can welding device welded close together, but the existing coating destroyed by the melting process and is removed, so that the weld seam is again uncovered. This makes the weld seam susceptible to corrosion, which is why it subsequently to the welding process using suitable coating agents is to be covered or coated.
  • Continuous can seam coating systems e.g. downstream a welding device on a welding arm are known.
  • a coating system arranged downstream of the welding head, by means of which the can seam by applying, for example, one Wet paint or powder coated.
  • US-A-3 077 171 describes a method and an apparatus for coating weld seams described on sheet metal parts such as can frames, in which a band or a layer of synthetic resin is applied to the weld seam.
  • the layer has a thickness of at least one mil and preferably three mils, with approximately 10 mils being considered the upper limit for the thickness becomes.
  • the layer is applied with the help of a preformed film or tape a roll is pressed onto the weld seam.
  • the layer hardens by exposure from heat, either from the still hot weld seam or from an additional burner.
  • the disadvantage however, is that a complex support and control device for the pressure roller is required. Another disadvantage is that with the known device a continuous Operation is not possible because after emptying a cylinder a piston is withdrawn and the Cylinder must be refilled before an extrusion process can continue.
  • EP-A-0 062 965 describes a device for coating the seams of can bodies Wet paint described.
  • a wet paint is placed in a circulation device above room temperature held and sprayed over spray arrangements on the inner seams of the can body, where it is solidified and hardened at room temperature.
  • Only coating materials can be used with this device like wet paint that is sprayable, taking care that the coating materials do not come to a standstill and already harden in the spray device, what is conceivable in the event of a business interruption.
  • WO-A-89/06165 a method is known, in which a coating powder plastic Application device supplied and sprayed in dry form on the can seam using compressed air becomes.
  • the substrate to which the powder is applied is previously at the melting temperature of the coating powder plastic has been brought. It is further provided that in a line conveyor section the coating powder plastic is preheated or that a microwave generator is provided is.
  • the object of the invention is a method and an apparatus in the preamble of the claims 1 or 5 specified type so that a thin seam coating in a continuous Operation in a simple and fail-safe manner is possible.
  • thermoplastic wire is used for the coating, which is easy to use can be transported close to the point of inquiry. At the request point, it turns into a flowable one Condition brought and then applied with the help of an application agent. This makes it easy to Way that the weld seam with a precisely positioned, film-thin coating is covered.
  • the coating material supplied according to the invention in the form of wire can be easily Handle in a manner without the risk of interrupting the coating material supply and without a long aftertreatment distance after the application of the coating material is required.
  • hot melt material or hot melt adhesive are also known under the name Hot melt or hot melt adhesive. You are special known from the adhesive technology, where they are used for gluing or joining two parts can be used. Especially in the automotive industry as well as in the textile and packaging industry become such hot melt materials for gluing the most diverse Materials used.
  • the hot melt material applied to a seam of the can, solidifies by cooling, which takes place quickly, since the metallic Can body dissipates the heat from the seam area within seconds. Cooling is superfluous and post-treatment is not necessary.
  • the exemplary embodiments relate to the coating of can seams.
  • the organs for the coating themselves do not have to or are only slightly modified to coat them To be able to use weld seams from metal sheets or car tanks.
  • the main modifications then relate to the transport device in any case for the workpiece to be coated.
  • Such transport facilities are known in the art; think for example after-treatment of weld seams by brushing, in which according to a brushing station by a coating station of the present invention could be replaced.
  • Figure 1 shows schematically a welding machine 1 with one on it coupled can body coating system 2.
  • the welding machine 1 has a frame 3 and is arranged thereon a round apparatus 4, a welding arm 5 and welding rollers 6 and 7. From the drawing is the vertically movable suspension the upper welding roller 6 can be seen. It is also shown the suspension 8, the welding arm 5 and a Z-rail 9. A just rounded still open can body 10 is in the round apparatus; a can frame 11 standing in front of the welding is running on the Z-rail 9. The can frame 12 is in the welding process.
  • the can body coating system 2 has one on a foot 20 resting, frame 21 which has one end 22 fixed to the Welding arm 5 is connected.
  • the transport device 23 has a conveyor belt 24, 25 and 26 for further transport of the welded can frames.
  • the conveyor belts 24, 25 and 26 are arranged as parallel double conveyor belts carried out such that e.g. the one above Welded seam 54 of the can frame 12 between the side attacking parallel belts of the conveyor belts 24, 25 and 26.
  • the can rests on the belts; at the Conveyor belt 25 hangs, e.g. held by magnetic force to which two bands running in parallel.
  • a heater 28 and a heater 29 are next to the frame 21 .
  • the heater 29 is an additional heater educated. Both heating devices 28, 29 act in particular on the weld seam 54 of the can bodies.
  • a drive is omitted as well a control device for the various organs of the can coating system.
  • Drive and control device are conventional trained and arranged in Gesges 21.
  • a wire-shaped, semi-finished coating material 30 is wound on a spool 31.
  • a conveyor 35 for coating material has rollers 36 for the wire-shaped Coating material 30.
  • the conveyor 35 has further as drive rollers 37 for the coating material 30 trained feed means, which in the conveying direction in front of a Application unit 40 for the coating material are arranged.
  • a processing unit 41 is included in the application unit 40 a reservoir 42 for those in a flowable state Coating material provided. Trained as a spray head 43 Order funds are omitted to relieve the drawing Pump connected to the reservoir 42.
  • a pressure variable chamber 39 designed as a pressure sensor 38 stands over a wall section 65 with the contents of the reservoir 42 as well as the control of the plant 2 operable in connection with what allows the pressure in the reservoir 42 to be in the desired range hold.
  • the controller works with one Valve 66 of the spray head 43 together.
  • FIG. 1 shows the same can body coating system 2 as Figure 1, but the processing unit 41 is modified is.
  • the processing unit 41 has a processing space 44, in which the wire-shaped coating material 30 directly through the Drive rollers 37 is conveyed into it.
  • Heater 45 which is used as an electric heater, microwave radiator etc. is trained.
  • a schematically illustrated screw conveyor 46 is designed such that it is the coating material convey to the spray head 43 under the necessary pressure can.
  • the screw conveyor thus acts as a pump for the material to be dispensed Coating material.
  • the mixing process for multi-component Material or the melting process for a thermoplastic containing Material takes place in room 44. Accordingly, that progressing mixing or melting process or the increase in pressure accordingly, the diameter of the helix and / or the spindle body yourself or change the pitch of the helix.
  • FIG. 3a shows the can body coating system 2 from FIG. 1, however, the processing unit 41 is also modified is shown.
  • the processing unit 41 has one on two processing rollers 50, 51 revolving endless belt 52, which is a device 60 for applying the coating material to the interface 54 form.
  • the processing roller 50 acts with one roller 53 together as drive rollers, which the wire-shaped coating material 30 pull between them and onto the endless belt 52 lead.
  • one can by the rollers 50, 53 Pre-profiling is done.
  • the preparation roller 51 presses the coating material 30 against the transported can frame 55, the frame in turn against this pressure from a support roller 56 is supported. Accordingly, the wire-shaped coating material 30 profiled (see Fig. 3b).
  • Figure 3b shows a cross section through the support roller 56 and Order role 51 at the point of common contact. Shown is the weld seam 57, the profiled wire-shaped coating material 30, the endless circulating belt 52.
  • a can frame 10 During operation of the welding machine 1, they reach a can frame 10 to be rounded sheet metal sections in the round apparatus 4 and there rounded to a frame 10. The freshly rounded one wraps around Can frame that running on the rollers 36, wire-shaped Coating material 30.
  • Frame conveyor moves the just rounded frame 10 on; the frame runs, now shown as frame 11 in the figure, with its edges in the Z-rail 9.
  • the frame 1 passes the suspension 8 of the welding arm 5 runs on the welding arm 5 continue until it is welded as a frame 12 by the welding rollers 6, 7 becomes.
  • the frame 12 still wraps around the coating material 30 and the welding arm 5, but is now through the welding sealed to a can jacket.
  • the freshly welded can frame 12 is from the welding machine 1 ejected and from the conveyor belt 24 of the can body coating system 2 taken over. Since the can frame 12 is closed everyone has to get on the inside of the can wall, i.e. on too organs acting in the area of the frame 21 are located, the end 22 firmly coupled to the welding arm 5 is. While the frame 12 runs over the conveyor belt 25, it becomes kept warm by a heater 28. This means in essential that the cooling from the welding process Weld seam is kept at an elevated temperature. After that the can frame 12 taken over by the conveyor belt 26, which Conveyor belt 26 transports the frame past the application unit 40. The coating material is now in the processing unit 41 prepared as follows to coat the can seam:
  • the coating material 30 is in its basic form, as a semi-finished product, unwound from the roll 31 and through the conveyor 35 with the help of the rollers 36 and the drive rollers 37 to the processing unit 41 at least partially drawn.
  • This funding process of the coating material in its basic form 30 is very simple and does not require any other equipment Expenditure.
  • the can body coating system is used for maintenance work 2 must be separated from the welding arm 5, can simply cut through the wire-shaped coating material become. The two loose ends are put back into service the can body coating system 2 e.g. with the help of a soldering iron simply welded together. A complex cleaning or a special treatment of the transport route of the conveyor 35 is completely eliminated.
  • this is Condition by mixing the components e.g. in the processing room 44 of the processing unit 40 reached.
  • Coating material contains at least one hot melt
  • this is Hot melt through a heater 45 in a flowable state brought.
  • the pump which was omitted to relieve the figures, delivers then the coating material prepared for coating from the reservoir 42 into the spray head 43 of the application medium.
  • control device of the can body coating system 2 now coordinate the operation of the spray head 43 accordingly the can bodies 12 and the ones in the processing room 44 acting pump and the drive rollers 37th effect of the conveyor 35.
  • the base material is immediate in front of the coating point in a suitable coating flowable condition prepared and immediately on the Can seam is applied.
  • the warm by the heater 29 held can seam facilitates or enables it to flow the freshly applied coating compound, insofar as this should have been applied irregularly by the spray head 43 or by the endless belt 52 in the solid state on the frame wall was created.
  • the spray head 43 is preferably also heated, so that at Interruptions in operation of a hot melt material do not solidify can.
  • the freshly coated can frame is now from 24 Conveyor belt 27 taken over and guided past an afterheater 29. This post-heating is not absolutely necessary. Here but the heat from the weld seam through the metallic can walls is quickly transported away, solidified hot melt material solidifies very fast. For visual reasons, it can now be reheated the surface of the seam coating is smoothed.
  • the coating process begins as soon as coating material is on the can seam is applied, and is complete once the material distribution over the weld seam has been formed.
  • the distributed material solidifies in the area of the conveyor belt 27. A complete hardening or hardening takes place without any post-treatment on the way to the next processing station the can frame.
  • Elaborate Facilities, e.g. the supply of molten material from the roll 31 through heated hoses from the round apparatus 4 via the welding arm 5 to the processing unit 41 are eliminated, as are the problems with partially solidifying on the above-mentioned transport route or clumping coating material such as powder or paint.
  • the supplied wire-shaped coating material 30 (which can also have a band shape or another cross-section) is pulled from the rollers 50, 52 to the processing unit 41, where the coating material reaches the endless belt and between the application roller 51 and the can frame 55 are squeezed together, is profiled.
  • the frame 45 is due to the action the heater 28 in heat, so that a hot melt to immediately flow away at least coating material 30 contained begins. It is possible that the auxiliary heater 61 Melt coating material 30 so that it is on the frame 55 is immediately liable.
  • the applied coating material can also flow from the inside of frame 55 brought by appropriate means after the Roll 51 are provided.
  • Another advantage of this embodiment is that a heater and a pump for that suitable for coating Conditioned, flowable coating material omitted, likewise of course a spray head 34 is omitted.
  • This embodiment allows a perfect coating make and the equipment expenditure of the can coating system 2 to keep to a minimum.
  • the support roller 56 fulfills the fixation of the can frame 55 another function.
  • the Can frames with a constant, minimal distance from the conveyor belts 25, 26, 27 can be transported further. This means, that with continuously working coating, the support roller 56 is coated every time there is no frame 55 between it and the application roller 51 is located. A doctor blade 57 simply scrapes the coating material 56.
  • roller 56 can of course also be used in the further Embodiments described above can be realized.
  • a Pre-profiling e.g. can be provided by the rollers 50, 53.
  • the invention is not based on the Coating of can seams limited.
  • the inventive method can in particular for Coating of sheet metal, e.g. deep-drawn sheet metal, applied become.
  • the task and solution remain essentially the same.

Landscapes

  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Paints Or Removers (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Moulding By Coating Moulds (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Coating With Molten Metal (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Closures For Containers (AREA)
  • Connection Or Junction Boxes (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
EP93106383A 1992-12-24 1993-04-20 Verfahren, Vorrichtung und Beschichtungsmaterial zum Dosennahtbeschichten Expired - Lifetime EP0603456B1 (de)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
CH3958/92 1992-12-24
CH395892 1992-12-24
CH395892 1992-12-24
CH1052/93 1993-04-06
CH105293 1993-04-06
CH105293 1993-04-06
CH113593 1993-04-15
CH113593 1993-04-15
CH1135/93 1993-04-15

Publications (2)

Publication Number Publication Date
EP0603456A1 EP0603456A1 (de) 1994-06-29
EP0603456B1 true EP0603456B1 (de) 1999-11-24

Family

ID=27172646

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93106383A Expired - Lifetime EP0603456B1 (de) 1992-12-24 1993-04-20 Verfahren, Vorrichtung und Beschichtungsmaterial zum Dosennahtbeschichten

Country Status (18)

Country Link
EP (1) EP0603456B1 (xx)
JP (1) JPH06206045A (xx)
CN (1) CN1060972C (xx)
AT (1) ATE186858T1 (xx)
AU (2) AU3704593A (xx)
BG (1) BG97832A (xx)
BR (1) BR9301651A (xx)
CA (1) CA2094358A1 (xx)
DE (1) DE59309884D1 (xx)
ES (1) ES2140423T3 (xx)
FI (1) FI931985A (xx)
HU (1) HU9301225D0 (xx)
IL (1) IL105589A0 (xx)
MX (1) MX9307598A (xx)
NO (1) NO931592L (xx)
PL (1) PL301310A1 (xx)
UY (1) UY23580A1 (xx)
WO (1) WO1994014546A1 (xx)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4727823B2 (ja) * 2001-01-22 2011-07-20 大和製罐株式会社 開口容易缶蓋の製造方法
WO2005061579A1 (es) * 2003-12-15 2005-07-07 Polimeros Ecologicos De Mexico, S.A. De C.V. Composicion termoplastica para el recubrimiento de la soldadura interna de envases metalicos y procedimiento para aplicar la misma
CN100436803C (zh) * 2004-04-12 2008-11-26 财团法人金属工业研究发展中心 胶合油箱及其制造方法
CN100411901C (zh) * 2004-04-12 2008-08-20 财团法人金属工业研究发展中心 胶合油箱及其制造方法
CN102114458B (zh) * 2011-02-18 2014-10-15 福建福贞金属包装有限公司 空罐焊缝粉末喷涂厚度在线检测控制系统及其控制方法
CN102198439A (zh) * 2011-06-07 2011-09-28 吴江市华源印铁制罐有限责任公司 一种罐体焊缝用的喷涂装置
US20140263403A1 (en) * 2013-03-15 2014-09-18 Nordson Corporation Liquid Dispensing Syringe
CN103317267B (zh) * 2013-06-24 2016-02-03 苏州华源中鲈包装有限公司 焊接补涂一体设备及焊接补涂方法
CN107321575B (zh) * 2017-07-03 2019-06-07 重庆科技学院 点焊合金粉末辊涂器
CN109834018A (zh) * 2019-02-21 2019-06-04 东莞睿步机器人科技有限公司 一种框箱、框箱涂装自动生产线及其生产方法
CN110329574B (zh) * 2019-06-27 2023-06-27 浙江营益金属包装有限公司 一种焊缝覆膜设备及其焊缝覆膜方法
CN110421832B (zh) * 2019-06-27 2024-07-26 浙江营益金属包装有限公司 一种覆膜结构
CN113275166B (zh) * 2021-04-28 2023-01-06 浙江易承环境科研有限公司 一种非开挖式管道修复装置及修复方法
CN113331165A (zh) * 2021-07-02 2021-09-03 四川省农业机械研究设计院 一种兼具田间运输功能的模块化遥控自走式风送喷雾机及控制方法
CN114602767B (zh) * 2022-04-08 2023-05-05 安徽新美格包装发展有限公司 高效节能制罐焊缝补涂烘干装置

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Publication number Priority date Publication date Assignee Title
US3077171A (en) * 1959-04-09 1963-02-12 American Can Co Method of forming the side seam of a can body

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US2690929A (en) * 1950-09-20 1954-10-05 Rheem Mfg Co Flame spray apparatus
DE2354164A1 (de) * 1973-10-29 1975-05-15 Willi Oppermann Verfahren zum kontinuierlichen ueberziehen von stahl-/ne-rohren und hohlprofilen mit kunststoffen, lacken und farben
DE3134968C2 (de) * 1980-10-07 1983-05-19 Paul 8962 Bergdietikon Aargau Opprecht Vorrichtung zum innenseitigen Auftragen einer Schutzschicht auf die Schweiß- bzw. Lötnaht von Dosenrümpfen
US4353326A (en) * 1981-03-20 1982-10-12 Nordson Corporation Apparatus for the stripping of the inside seam of a can body moving at a high speed
US4361113A (en) * 1981-08-24 1982-11-30 Daiwa Can Company, Limited Apparatus for painting the inner surface of the side seam of a can body
DE3800448A1 (de) * 1988-01-09 1989-07-20 Ribnitz Peter Verfahren und vorrichtung zur durchlaufbeschichtung von werkstuecken
DE69003491T2 (de) * 1989-08-11 1994-03-17 Henkel France Verfahren und Vorrichtung zur kontinuierlichen Antiadhesivbehandlung eines Klebebandes, insbesondere aus wärmeschmelzbarem, extrudiertem Klebstoff und damit erthaltenes Produkt.

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US3077171A (en) * 1959-04-09 1963-02-12 American Can Co Method of forming the side seam of a can body

Also Published As

Publication number Publication date
FI931985A (fi) 1994-06-25
NO931592D0 (no) 1993-04-30
PL301310A1 (en) 1994-06-27
UY23580A1 (es) 1993-05-17
FI931985A0 (fi) 1993-05-03
IL105589A0 (en) 1993-09-22
AU3704593A (en) 1994-07-07
EP0603456A1 (de) 1994-06-29
MX9307598A (es) 1994-06-30
CA2094358A1 (en) 1994-06-25
CN1060972C (zh) 2001-01-24
ATE186858T1 (de) 1999-12-15
CN1088489A (zh) 1994-06-29
JPH06206045A (ja) 1994-07-26
NO931592L (no) 1994-06-27
AU5691694A (en) 1994-07-19
HU9301225D0 (en) 1993-09-28
ES2140423T3 (es) 2000-03-01
BR9301651A (pt) 1994-06-28
DE59309884D1 (de) 1999-12-30
WO1994014546A1 (de) 1994-07-07
BG97832A (en) 1994-08-15

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