DE1546977C3 - Method and device for coating the inner surface of a hollow body - Google Patents
Method and device for coating the inner surface of a hollow bodyInfo
- Publication number
- DE1546977C3 DE1546977C3 DE1546977A DE1546977A DE1546977C3 DE 1546977 C3 DE1546977 C3 DE 1546977C3 DE 1546977 A DE1546977 A DE 1546977A DE 1546977 A DE1546977 A DE 1546977A DE 1546977 C3 DE1546977 C3 DE 1546977C3
- Authority
- DE
- Germany
- Prior art keywords
- hollow body
- powder
- negative pressure
- shut
- connection
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/26—Lining or sheathing of internal surfaces
-
- 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
-
- 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
- B05C19/00—Apparatus specially adapted for applying particulate materials to surfaces
- B05C19/005—Apparatus specially designed for applying particulate materials to the inside of hollow work
- B05C19/007—Apparatus specially designed for applying particulate materials to the inside of hollow work for applying the particulate materials to the inside of hollow 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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
- B05D1/22—Processes for applying liquids or other fluent materials performed by dipping using fluidised-bed technique
- B05D1/24—Applying particulate materials
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
-
- 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
- B05D3/0218—Pretreatment, e.g. heating the substrate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Electrostatic Spraying Apparatus (AREA)
Description
F i g. 1 eine schematische Ansicht einer Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens, F i g. 1 a schematic view of a device for carrying out the method according to the invention,
F i g. 2 eine schematische Querschnittsansicht einer dem Wirbelkasten nachgeschalteten Verwirbelungsvorrichtung. F i g. 2 is a schematic cross-sectional view of a swirling device connected downstream of the swirl box.
Die Vorrichtung gemäß F i g. 1 weist einen als Wirbelkasten ausgebildeten Vorratsbehälter 1 auf, in den von der Unterseite 2 aus über eine poröse Platte 24 Luft eintreten kann, die das in Pulverform im Vorratsbehälter 1 enthaltene Auskleidungsmaterial durch Wirbelung schwebend hält. Überschüssige Luft kann dabei durch einen Ablaßstutzen 5 entweichen. Das durch Luftverwirbelung schwebend gehaltene Luft-Kunstharzpulvergemisch 28 kann durch Unterdruck aus dem Vorratsbehälter 1 über eine in den Vorratsbehälter eintauchende Leitung 4 und ein Abschlußventil 6 abgezogen werden. Der auszukleidende Hohlkörper in Gestalt eines Rohres 11 ist mit seinem Endflansch an einer Anschlußplatte 9 mittels Klemmen 10 lösbar festgelegt und auf diese Weise an das Ventilö angeschlossen. Zwischen dem Ventile und der Anschlußplatte 9 kann noch eine Verwirbelungsvorrichtung7 (Fig.2) eingebaut sein, welche mit Schaufeln 8 versehen ist, welche die Verwirbelung des Luft-Pulvergemisches noch verstärken.The device according to FIG. 1 has a storage container 1 designed as a vortex box, in the air can enter from the bottom 2 via a porous plate 24, which is in powder form in the Holding tank 1 contained lining material by vortex floating. Excess air can escape through a drain port 5. The one kept floating by air turbulence Air-synthetic resin powder mixture 28 can by negative pressure from the storage container 1 via a into the Reservoir immersed line 4 and a shut-off valve 6 are withdrawn. The one to be lined Hollow body in the form of a tube 11 is with its end flange on a connection plate 9 by means Terminals 10 fixed releasably and connected in this way to the Ventilö. Between the valves and the connection plate 9 can also have a swirling device 7 (FIG. 2) installed, which is provided with blades 8, which increase the turbulence of the air-powder mixture.
An dem oberen Flansch 13 des Rohres 11 ist mittels Klemmen 16 ein Saugstück 14 angeschlossen, welches über eine biegsame Leitung 17, ein Abschlußventil 18 und ein Schauglas 19 an eine Unterdruckquelle 20 in Gestalt eines Staubfang-Vakuumbehälters angeschlossen ist.A suction piece 14 is connected to the upper flange 13 of the pipe 11 by means of clamps 16, which via a flexible line 17, a shut-off valve 18 and a sight glass 19 to a vacuum source 20 is connected in the form of a dust collector vacuum container.
Dieser Behälter ist mit einer trichterförmigen porösen Membran 21 versehen, die über eine Dichtung 25 mit einem Rohrstummel 26 versehen ist, der normalerweise über ein Abschlußventil 22 abgeschlossen ist. Hieran ist eine Leitung 23 zur Abführung des überschüssigen Pulvers angeschlossen. Über ein Rohr 27 steht der Behälter mit einem Unterdruckerzeuger in Verbindung.This container is provided with a funnel-shaped porous membrane 21, which has a seal 25 is provided with a pipe stub 26 which is normally closed via a shut-off valve 22 is. A line 23 for discharging the excess powder is connected to this. Via a pipe 27 the container is connected to a vacuum generator.
Das Verfahren wird wie folgt durchgeführt: Nachdem das vorgewärmte zu beschichtende Rohr 11 auf der Platte 9 festgeklemmt ist und die biegsame Leitung 17 an dem oberen Rohrflanschl3 festgelegt ist, wird das Luft-Pulvergemisch 28 in dem als Verwirbelungskasten ausgebildeten Vorratsbehälter 1 verwirbelt und schwebend gehalten. Daraufhin wird das Ventil 18 geöffnet, so daß sich der im Behälter 20 befindliche Unterdruck bis zu dem noch geschlossenen Ventil 6 zwischen Rohr 11 und Vorratsbehälter 1 fortpflanzt. Darauf wird plötzlich das Ventil 6 geöffnet und danach das Ventil 18 geschlossen. Hierdurch wird eine stoßweise Beschichtung durch das stark durchwirbelte Luft-Pulvergemisch an der Innenseite des Rohres 11 bewirkt, und dieses Pulver auf der Innenseite des Rohres 11 erhärtet infolge der Wärme. Dieser stoßweise Beschichtungsvorgang wiederholt sich, bis die gewünschte Stärke der Beschichtung hergestellt ist.The process is carried out as follows: After the preheated pipe 11 to be coated the plate 9 is clamped and the flexible line 17 is fixed to the upper Rohrflanschl3, the air-powder mixture 28 is swirled in the storage container 1 designed as a swirl box and kept floating. The valve 18 is then opened so that the in the container 20 negative pressure up to the still closed valve 6 between pipe 11 and storage container 1 propagates. The valve 6 is then suddenly opened and then the valve 18 is closed. Through this is an intermittent coating due to the strongly whirled air-powder mixture on the inside of the tube 11 causes, and this powder hardens on the inside of the tube 11 due to the heat. This intermittent coating process is repeated until the desired thickness of the coating is achieved is.
Als Auskleidungsstoffe kommen Super-Polyamide und chlorierte Poyester in Betracht. Die Rohre 11 werden vorzugsweise auf 300 bis 350° C in einem Ofen durch Induktionserhitzung oder durch Infrarotbestrahlung vorerwärmt.Super polyamides and chlorinated polyesters can be used as lining materials. The pipes 11 are preferably heated to 300 to 350 ° C in an oven by induction heating or by infrared radiation preheated.
Claims (4)
gang gegebenenfalls wiederholt wird. Der Erfindung liegt die Aufgabe zugrunde, einHere, the hollow body remains heated in open resin powder and one end is bonded to the powder supply, while the storage container pressure containing the resin powder is generated inside the hollow body. This means, and at its other end to a suction line, that the negative pressure is connected within the storage unit in order to gradually increase the synthetic resin powder container and to push a part of the powder into the hollow body even at a low pressure on the inner surface of the hollow body bring, characterized in that it is sucked in, which leads to the fact that, for. B. in irregular coating process intermittently shaped hollow bodies, eg bodies with leads by the hollow body, during its 15 S-shaped curvatures, in valve housings, when connected to the reservoir, shut off T-connections and the like Curvatures and is not exposed to negative pressure, the prevailing un- bulges in the suction line, the amounts of air trapped and then can be removed quickly enough after shutting off, which in addition to the negative pressure, the. between the hollow body and leads to the fact that at these points the adhesion of the built-in storage container existing connection open 20 sucked powder is impaired. These air bubbles, in order to be sucked in by the vacuum generated in the hollow body while the powder penetrates the vacuum, which are suspended by air turbulence, reduce the powder held in the hollow body, reduce pressure and cause an increase in friction that the rate of rise of the powder is reduced in connection with the supply container of the powder. This can lead to an irregular excess and reduce the thickness of the coating.
step is repeated if necessary. The invention is based on the object
55 Zur Durchführung des erfindungsgemäßen Verfah-Have curvatures, quickly lined with a protective layer that covers the inner surface evenly and is completely pore-free.
55 To carry out the method according to the invention
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK436962A DK122505B (en) | 1962-10-10 | 1962-10-10 | Method and apparatus for cladding the inner surface of heated metal pipes with a plastic. |
NL6504624A NL142902B (en) | 1962-10-10 | 1965-04-12 | DEVICE FOR COVERING INTERNAL SURFACES OF HOLLOW BODIES. |
Publications (3)
Publication Number | Publication Date |
---|---|
DE1546977A1 DE1546977A1 (en) | 1969-05-29 |
DE1546977B2 DE1546977B2 (en) | 1973-08-02 |
DE1546977C3 true DE1546977C3 (en) | 1974-03-14 |
Family
ID=26067453
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1546977A Expired DE1546977C3 (en) | 1962-10-10 | 1963-10-03 | Method and device for coating the inner surface of a hollow body |
DE1577794A Granted DE1577794B2 (en) | 1962-10-10 | 1966-09-30 | Device for coating the inner surface of a hollow body |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1577794A Granted DE1577794B2 (en) | 1962-10-10 | 1966-09-30 | Device for coating the inner surface of a hollow body |
Country Status (8)
Country | Link |
---|---|
AU (1) | AU407431B2 (en) |
BE (2) | BE644890A (en) |
CH (2) | CH404479A (en) |
DE (2) | DE1546977C3 (en) |
FR (1) | FR1398650A (en) |
GB (2) | GB1020253A (en) |
LU (2) | LU46295A1 (en) |
NL (2) | NL290528A (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4089998A (en) * | 1976-07-13 | 1978-05-16 | Gibson Jack Edward | Method of powder coating the interior of tubular goods |
AT375295B (en) * | 1979-03-06 | 1984-07-25 | Voest Alpine Ag | METHOD AND DEVICE FOR THE INTERNAL COATING OF TUBES |
US4382421A (en) * | 1980-04-11 | 1983-05-10 | Vetco, Inc. | Tube coating apparatus |
CA1156883A (en) * | 1980-04-11 | 1983-11-15 | David A. Warren | Tube coating method and apparatus |
US6508413B2 (en) * | 2000-04-06 | 2003-01-21 | Siemens Westinghouse Power Corporation | Remote spray coating of nuclear cross-under piping |
CN107081242B (en) * | 2017-04-13 | 2023-12-15 | 绥阳县宝雅装饰材料有限责任公司 | Coating device for plastic plate |
EP3743224A4 (en) * | 2017-11-21 | 2021-06-30 | New Mexico Tech University Research Park Corporation | Aerosol method for coating |
CN110065342A (en) * | 2018-01-20 | 2019-07-30 | 邢子仪 | A kind of caricature is painted from life tool box |
CN109465159A (en) * | 2018-10-23 | 2019-03-15 | 济南德士净水管道制造有限公司 | A kind of plastic coating method and plastic-coated device |
CN114192362B (en) * | 2021-11-19 | 2023-05-26 | 潍坊联威机械有限公司 | Material recovery device for pipe fitting inner coating negative pressure production equipment |
CN114160390B (en) * | 2021-11-19 | 2023-05-26 | 潍坊联威机械有限公司 | Production process of pipe fitting inner coating |
-
0
- NL NL123054D patent/NL123054C/xx active
- NL NL290528D patent/NL290528A/xx unknown
-
1963
- 1963-10-03 CH CH1215963A patent/CH404479A/en unknown
- 1963-10-03 DE DE1546977A patent/DE1546977C3/en not_active Expired
-
1964
- 1964-03-09 BE BE644890A patent/BE644890A/xx unknown
- 1964-06-11 LU LU46295D patent/LU46295A1/xx unknown
- 1964-06-16 FR FR978376A patent/FR1398650A/en not_active Expired
- 1964-06-19 GB GB25443/64A patent/GB1020253A/en not_active Expired
-
1966
- 1966-04-12 GB GB15972/66A patent/GB1123697A/en not_active Expired
- 1966-09-21 LU LU52006A patent/LU52006A1/xx unknown
- 1966-09-28 BE BE687503D patent/BE687503A/xx unknown
- 1966-09-28 AU AU11764/66A patent/AU407431B2/en not_active Expired
- 1966-09-30 DE DE1577794A patent/DE1577794B2/en active Granted
- 1966-10-11 CH CH1462966A patent/CH455588A/en unknown
Also Published As
Publication number | Publication date |
---|---|
LU46295A1 (en) | 1965-06-11 |
DE1577794C3 (en) | 1975-06-12 |
BE644890A (en) | 1964-09-09 |
CH455588A (en) | 1968-07-15 |
GB1020253A (en) | 1966-02-16 |
DE1546977B2 (en) | 1973-08-02 |
DE1577794A1 (en) | 1970-04-09 |
GB1123697A (en) | 1968-08-14 |
BE687503A (en) | 1967-03-01 |
NL123054C (en) | |
NL290528A (en) | |
AU407431B2 (en) | 1970-11-09 |
AU1176466A (en) | 1969-03-28 |
CH404479A (en) | 1965-12-15 |
LU52006A1 (en) | 1966-11-21 |
DE1577794B2 (en) | 1974-08-15 |
DE1546977A1 (en) | 1969-05-29 |
FR1398650A (en) | 1965-05-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
SH | Request for examination between 03.10.1968 and 22.04.1971 | ||
C3 | Grant after two publication steps (3rd publication) |