EP0167088B1 - Procédé et installation pour le revêtement intérieur d'un objet creux - Google Patents

Procédé et installation pour le revêtement intérieur d'un objet creux Download PDF

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Publication number
EP0167088B1
EP0167088B1 EP85107829A EP85107829A EP0167088B1 EP 0167088 B1 EP0167088 B1 EP 0167088B1 EP 85107829 A EP85107829 A EP 85107829A EP 85107829 A EP85107829 A EP 85107829A EP 0167088 B1 EP0167088 B1 EP 0167088B1
Authority
EP
European Patent Office
Prior art keywords
coating
arrangement
heat
heat source
arm
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
Application number
EP85107829A
Other languages
German (de)
English (en)
Other versions
EP0167088A2 (fr
EP0167088A3 (en
Inventor
Peter Dipl.-Ing. Ribnitz
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT85107829T priority Critical patent/ATE48955T1/de
Publication of EP0167088A2 publication Critical patent/EP0167088A2/fr
Publication of EP0167088A3 publication Critical patent/EP0167088A3/de
Application granted granted Critical
Publication of EP0167088B1 publication Critical patent/EP0167088B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2676—Cans or tins having longitudinal or helical seams
    • 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
    • B05B13/0618—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 only a part of the inside of the hollow bodies being treated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/12—Plant for applying liquids or other fluent materials to objects specially adapted for coating the interior of hollow bodies
    • 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
    • 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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • 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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B05D3/0263—After-treatment with IR heaters
    • 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

Definitions

  • the present invention relates to a method of the type defined in the preamble of claim 1 and an installation of the type defined in the preamble of claim 3.
  • DE-PS-714 669 proposes to apply a varnish to the frame edges that are not yet connected, and then to solder the edges, the varnish being selected such that the soldering temperature leads to baking of the varnish.
  • Inductive sources gas heaters or infrared heaters can be used as the heat source. This brings the entire cylindrical body to the stoving temperature and keeps it at this temperature for a certain time. Particularly when using such a method on cylindrical bodies made of bare sheet metal, there is a high level of heat reflection and the efficiency of such heat sources acting from the outside is correspondingly poor, measured in terms of the stoving effect to be achieved.
  • the body to be coated is preheated from the outside in order to improve the adhesion of the powder sprayed on from the inside. If this is realized, body warming from the outside heats up the entire body, the heat capacity of which entails transferring too much heat into the area of a proposed coating arrangement, which in turn can lead to the coating arrangement and in particular the spray nozzles being too strong be heated, which can lead to the packaging of such outlets.
  • the medium layer applied in this way on the inside is then heat-treated by heat sources provided outside the hollow body.
  • the aim of the present invention is to use the heat necessary for the heat treatment of the inner coating in a targeted manner where it is also needed. This is solved in the method of the type mentioned by execution according to the characterizing part of claim 1, or, in the creation of the type mentioned, by training according to the characterizing part of claim 3.
  • heat generated within the hollow body is used according to the invention for the heat treatment of the applied medium layer, i.e. the heat used for this is applied directly to the inside of the body, coated or still uncoated.
  • Another significant advantage of the proposed method or the proposed system is the fact that the thermal stress on the immediate outer body environment is significantly lower than in conventional methods with warming up from the outside, which in addition to the verb mentioned above Efficiency further leads to the fact that a continuous conveyor belt arrangement can now be provided at least between the coating arrangement and the stoving heat source arrangement in the region of the coating, with at least one conveyor belt for moving the body between the mentioned arrangements.
  • a common conveyor belt arrangement as provided in EP-A 0 120 810, provided between the coating arrangement and the stoving heat source arrangement, must be arranged on the side opposite the heat source and thus the coating, in order to reduce its thermal impairment by the heat source to prevent and in order not to have to use complex, thermally resistant conveyor belt material.
  • the conveyor belt provided can now, as mentioned, easily in the coating area, i.e. in the area of the seam, which act on the body, the design freedom of the overall system is thus significantly increased.
  • the heat source arrangement preferably has at least one infrared radiation source.
  • the fact that a temperature measurement is carried out in the arm area in one embodiment variant makes it possible to monitor the temperature conditions during body processing.
  • the result of this temperature measurement is passed as an ACTUAL value output signal to an ACTUAL value input of a temperature control circuit, with the heat source arrangement as an actuator, with which, then, of course, a TARGET value specification unit can be entered, and the actual temperature value is regulated to this.
  • At least one reflector arrangement be provided on the arm, in order to concentrate the source radiation on predetermined areas of the body.
  • the heat source arrangement is preferably extended axially and arranged in this regard at a radial distance
  • the reflector arrangement comprises an axial reflector channel arranged on the arm side of the source arrangement, which is preferably incorporated into the arm and has a reflective surface.
  • FIG. 1 shows the general arrangement of a can welding and seam coating system, as is usually built today, without the features according to the invention.
  • the can welding and coating arrangement 1 is fed with flat sheets 2, which are formed in the system in a known manner to round cylinder frames, the opposite longitudinal edges of which are then welded to a welding station 3.
  • the shaping of the frames and the welding are not the subject of the present invention and are therefore not described in more detail.
  • a conveyor belt 4 takes over the hollow body, i.e. the can bodies, which are moved astride an arm 6, the latter comprising a coating station with a medium supply line 5 for the coating medium, corresponding nozzles and usually a suction station 7.
  • the can bodies 11 are then placed on a further conveyor belt 9, with the aid of which they are moved through a stoving station 8, where they are generally heated from the outside by means of burners, induction heating elements, and heat sources 10. The temperature is maintained for a certain time by this indirect heating of the coated seam over a prescribed passage of the body 11.
  • the arm 6 usually also referred to as a welding arm, here has an extension 6a, viewed in the direction of movement of the body 11, directed downstream.
  • the coating of the can bodies which is supported electrostatically in a known manner, takes place via the medium supply line 5 for powder or lacquer, with the aid of a high-voltage generator 12, with the aid of which a high electrostatic field is applied between the can body and electrodes 5a provided for this purpose.
  • the high-voltage generator 12 emits a DC voltage of approximately 60 kV.
  • infrared rod radiators 14 are arranged in the extension 6a of the arm. These are fed via cables 13 which are guided through the entire arm 6, 6a. This is facilitated in particular by the fact that the medium film, powder or lacquer film 17, is heated directly, especially since such systems also coat cylindrical bodies down to a diameter of approximately 40 to 60 mm.
  • a reflector 18 which is preferably integrated in the arm 6, 6a, as can be seen in FIG. 3, as a reflective groove incorporated therein.
  • the heat radiation of the radiator 14 can be made to the necessary width B, e.g. B. between about 5 and about 25 mm. Since the rod radiator 14 emits up to 3 kW of thermal radiation with a length of, for example, only about 800 mm, a very high thermal output per unit area can thus be achieved on the inner surface of the body 11.
  • a temperature measurement is generally carried out on or in the arm in the area of the arm. This takes place either indirectly using fever optics or directly using a pyrometer 20.
  • the result of the temperature measurement a signal F ('.beta.Jsr) as a function of the measured actual temperature, is sent to a comparison unit 22 with a corresponding signal F (which can be input to a specification unit 24).
  • ' ⁇ s OLL compared and the supply voltage of the radiator via the leads 13 as a controlled variable with the difference F ( ⁇ / ⁇ ).
  • a controller 26, such as a known thyristor controller, is also provided in order to set the infrared radiators 14 as actuators.
  • the design of controller 26, specification unit 24 and comparison unit 22 are known and will not be explained further.
  • This arrangement enables exact temperature control on the coated seam, the powder or lacquer layer.
  • the number of IR radiators 14 and their length depend on the transport speed of the bodies 11 and the hardening property of the coating medium on the layer 17.
  • FIG. 4 Another embodiment variant is shown in FIG. 4.
  • one or more IR radiators 19 are installed before the spray arrangement with the feed line 5.
  • the heat radiation is specifically focused on a strip of the inner wall of the can body 11 by means of a reflector 18 '.
  • the can body is preheated in the seam area and in the subsequent coating process, and in particular during powder coating, a significantly improved deposition or. Accumulation efficiency achieved without such a lot of heat in the area of the coating arrangement that the nozzles could paper.
  • the powder output per unit of time can thus be significantly reduced, and thus also the load on the powder recovery system, such as the suction system 7 and its pumps.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Claims (10)

1. Procédé pour pourvoir d'un revêtement intérieur des corps creux, notamment des cordons de soudure de corps de boite soudés dans le sens de la longueur, procédé selon lequel des corps creux sont déplacés par rapport à un bras de travail intérieur, par lequel, sous l'influence d'une chaleur émise de l'intérieur et par application d'un produit de revêtement, une couche de produit est formée sur chaque corps creux et est avancée et la couche de produit appliquée est traitée thermiquement, caractérisé en ce que la couche de produit est traitée thermiquement en soumettant le corps creux et/ou le corps creux revêtu à la chaleur émise de l'intérieur avant et/ou après l'application, pour l'obtention du type de couche souhaité.
2. Procédé selon la revendication 1, pour la réalisation d'un revêtement avec cuisson, caractérisé en ce que, à la suite de l'application de la chaleur de cuisson est émise directement de l'intérieur sur le corps creux.
3. Installation pour la mise en oeuvre du procédé selon la revendication 1, comportant un bras de travail (6) et des organes (4) pour déplacer des corps creux (11) par rapport à et par dessus le bras de travail (6), un dispositif d'enduction (5) étant prévu sur le bras de travail (6) ainsi qu'une source de chaleur (14) destinée à influencer le processus d'enduction, une seconde source de chaleur (14) étant prévue pour le traitement thermique de la couche appliquée, caractérisé en ce que la source de chaleur (14) destinée au traitement thermique de la couche appliquée est la source de chaleur (14) prévue sur le bras de travail (6) pour influencer le processus d'enduction et est disposée sur le bras de travail (6) en amont et/ou en aval du dispositif d'enduction (5).
4. Installation selon la revendication 3, caractérisée en ce qu'en aval du dispositif d'enduction (5), est disposé un dispositif (14) formant source de chaleur de cuisson destiné à cuire la couche appliquée par le dispositif d'enduction (5, 7, 12).
5. Dispositif selon la revendication 4, caractérisé en ce qu'au voisinage du revêtement, est disposé un dispositif transporteur à bande continu (4) qui s'étend au moins entre le dispositif cuisson et comporte au moins une bande transporteuse pour le déplacement des corps (11) entre le dispositif d'enduction et le dispositif formant source de chaleur de cuisson (5, 7, 12; 14).
6. Installation selon l'une des revendications 3 à 5, caractérisée en ce que le dispositif formant source de chaleur (14, 19) comprend au moins une source de rayonnement infra-rouge.
7. Installation selon l'une des revendications 3 à 6, caractérisée en ce qu'au voisinage du bras (6, 6a), est effectuée au moins une mesure de température, par exemple au moyen d'un capteur de température (20).
8. Installation selon la revendication 7, caractérisée en ce que le résultat de la mesure de température est, en tant que signal de sortie représentatif d'une valeur réelle, dirigé sur une entrée de valeur réelle d'un circuit de régulation de température, le dispositif formant source de chaleur (14) constituant l'élément de réglage.
9. Installation selon l'une des revendications 3 à 8, caractérisée en ce qu'au moins un dispositif réflecteur (18) est prévu sur le bras (6, 6a) pour concentrer le rayonnement émis par la source sur des zones prédéterminées des corps.
10. Installation selon la revendication 9, caractérisée en ce que le dispositif formant source de chaleur s'allonge dans la direction axiale du bras et est disposé à une certaine distance radiale de celui-ci, alors que le dispositif réflecteur (18) comprend une gouttière réflectrice axiale, disposée du côté du bras par rapport au dispositif formant source, et de préférence usinée en creux dans le bras.
EP85107829A 1984-07-06 1985-06-24 Procédé et installation pour le revêtement intérieur d'un objet creux Expired EP0167088B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85107829T ATE48955T1 (de) 1984-07-06 1985-06-24 Verfahren zur innenbeschichtung von hohlkoerpern und anlage zur ausfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH326984 1984-07-06
CH3269/84 1984-07-06

Publications (3)

Publication Number Publication Date
EP0167088A2 EP0167088A2 (fr) 1986-01-08
EP0167088A3 EP0167088A3 (en) 1986-09-10
EP0167088B1 true EP0167088B1 (fr) 1989-12-27

Family

ID=4252326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85107829A Expired EP0167088B1 (fr) 1984-07-06 1985-06-24 Procédé et installation pour le revêtement intérieur d'un objet creux

Country Status (5)

Country Link
US (1) US4759946A (fr)
EP (1) EP0167088B1 (fr)
JP (1) JPH0659441B2 (fr)
AT (1) ATE48955T1 (fr)
DE (1) DE3574941D1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3800448A1 (de) * 1988-01-09 1989-07-20 Ribnitz Peter Verfahren und vorrichtung zur durchlaufbeschichtung von werkstuecken
JPH03504249A (ja) * 1988-12-14 1991-09-19 帝人株式会社 慢性肝炎治療剤
NL8902697A (nl) * 1989-11-01 1991-06-03 Thomassen & Drijver Werkwijze en inrichting voor het vervaardigen van metalen busrompen met een inwendige deklaag.
US5847370A (en) * 1990-06-04 1998-12-08 Nordson Corporation Can coating and curing system having focused induction heater using thin lamination cores
US5821504A (en) * 1990-06-04 1998-10-13 Nordson Corporation Induction heating system for 360° curing of can body coatings
US5221402A (en) * 1991-04-16 1993-06-22 The Challenge Machinery Company Folding machine sprayer and fold plate and method of use therefore
CH684524A5 (de) * 1991-12-17 1994-10-14 Ernst M Frey Schweissnahtabdeckung auf der Innenseite von Blechrohren.
DE4227455C2 (de) * 1992-08-19 1996-04-04 Wagner Int Vorrichtung zum elektrostatischen Nachbeschichten der Innenflächen von Schweißnähten
JPH07173634A (ja) * 1993-10-14 1995-07-11 Advance Co Ltd 酸化物系セラミックス膜の製造方法
US5725670A (en) * 1994-02-18 1998-03-10 Nordson Corporation Apparatus for powder coating welded cans
US5971732A (en) * 1994-10-11 1999-10-26 Applied Composites Corp. Apparatus for molding a part
US9004003B2 (en) * 2009-06-25 2015-04-14 Xerox Corporation Apparatus for applying an acoustic dampening coating to the interior of a xerographic drum
US20140295095A1 (en) * 2013-04-02 2014-10-02 Robert Langlois In-Line Powder Coating of Non-Conductive Profiles Produced in a Continuous Forming Process such as Pultrusion and Extrusion
JP2022529289A (ja) * 2019-04-19 2022-06-20 フォテックス インコーポレーテッド 缶の内部をキュアリングするためのシステムおよび方法

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
GB431562A (en) * 1933-10-11 1935-07-11 British Mannesmann Tube Compan Improved method of coating the interior surface of steel tubes or the like
DE714669C (de) * 1939-04-14 1941-12-05 Continental Can Co Verfahren und Vorrichtung zum nachtraeglichen Anbringen eines Lackueberzuges auf der Innenseite des Falzes bei der Herstellung von innen lackierten Blechdosenruempfen aus bis auf die Falzkanten lackierten Blechtafeln durch Runden, Falzen und Loeten
US3077171A (en) * 1959-04-09 1963-02-12 American Can Co Method of forming the side seam of a can body
US3526027A (en) * 1967-05-29 1970-09-01 Continental Can Co Apparatus for coating side seam areas of containers
US3535144A (en) * 1968-05-22 1970-10-20 Dow Chemical Co Method of coating containers
US3815544A (en) * 1971-01-19 1974-06-11 Nordson Corp Apparatus for striping inside seams of cans
DE2126598C3 (de) * 1971-05-28 1980-04-03 Fried. Krupp Gmbh, 4300 Essen Verfahren zum Trocknen von lackierten oder bedruckten Metalldosen
JPS4879844A (fr) * 1972-01-27 1973-10-26
CH624591A5 (fr) * 1977-05-23 1981-08-14 Paul Opprecht
US4199672A (en) * 1977-11-10 1980-04-22 Geiss Edward G Apparatus for curing coatings on welded longitudinal seams of can bodies
DE2841295C3 (de) * 1978-09-22 1981-10-22 Aeg-Elotherm Gmbh, 5630 Remscheid Verfahren zum Beschichten der Innenwand eines Rohres
JPS56161870A (en) * 1980-05-14 1981-12-12 Sumitomo Light Metal Ind Ltd Method and apparatus for coating long pipe having small diameter
JPS59115765A (ja) * 1982-12-21 1984-07-04 Ohbayashigumi Ltd 樹脂ライニングによる排気筒の内面防食工法及び装置

Also Published As

Publication number Publication date
JPS61107974A (ja) 1986-05-26
EP0167088A2 (fr) 1986-01-08
US4759946A (en) 1988-07-26
EP0167088A3 (en) 1986-09-10
DE3574941D1 (de) 1990-02-01
ATE48955T1 (de) 1990-01-15
JPH0659441B2 (ja) 1994-08-10

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