EP0029792B1 - Dispositif pour réaliser en continu le revêtement de la surface externe d'un profilé - Google Patents

Dispositif pour réaliser en continu le revêtement de la surface externe d'un profilé Download PDF

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Publication number
EP0029792B1
EP0029792B1 EP80401688A EP80401688A EP0029792B1 EP 0029792 B1 EP0029792 B1 EP 0029792B1 EP 80401688 A EP80401688 A EP 80401688A EP 80401688 A EP80401688 A EP 80401688A EP 0029792 B1 EP0029792 B1 EP 0029792B1
Authority
EP
European Patent Office
Prior art keywords
coating
section
liquid product
leak proof
seal
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
EP80401688A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0029792A1 (fr
Inventor
Michel Poirier
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.)
DUJARDIN MONTBARD SOMENOR
Original Assignee
DUJARDIN MONTBARD SOMENOR
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 DUJARDIN MONTBARD SOMENOR filed Critical DUJARDIN MONTBARD SOMENOR
Priority to AT80401688T priority Critical patent/ATE12076T1/de
Publication of EP0029792A1 publication Critical patent/EP0029792A1/fr
Application granted granted Critical
Publication of EP0029792B1 publication Critical patent/EP0029792B1/fr
Expired 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
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
    • 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
    • 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
    • B05D2254/00—Tubes
    • B05D2254/02—Applying the material on the exterior of the tube

Definitions

  • the present invention relates to a device for continuously coating the external surface of a profile with a substantially constant profile, in particular closed such as a tube, using a liquid product.
  • a tef device does not, however, allow to obtain a coating of constant thickness.
  • the present invention aims to overcome this drawback. To this end, it relates to a device as above, characterized in that the semi-tight seal is, on the inner side of the coating tank, fully immersed in the liquid product and that it is formed of 'A hollow strand of extensible material and filled with a fluid under pressure of density close to that of said liquid product.
  • this device there is created inside the hollow tube, a pressure variation along its periphery which is identical to that which exists in the coating tank due to the pressure exerted at a point by the column. liquid above, which varies according to its height.
  • This device therefore makes it possible to achieve conditions for the exit of the liquid coating product on the profile through the semi-sealed joint identical at all points around the periphery of the profile and, therefore, ensuring a constant thickness at all points of the profile. .
  • the inside of the flange can be placed in communication in one of its parts with an adjustable pressure device, in order to be able to adjust the average pressure exerted by the semi-tight seal on the profile.
  • the entry seal of the profile in the coating tank which must be waterproof, it may consist of a plate of deformable material pierced along the profile plus a thickness such that the pressure thus exerted on the profile is sufficient to make it impossible to pass any product.
  • this type of seal has a disadvantage in that it wears out very quickly, being in direct contact with the profile which runs and which rubs against it, the wear being increasing as a function of the pressure exerted by the seal, unlike the semi-sealed outlet joint which always has liquid product between it and the profile.
  • the seal is constituted by a cylinder of the same shape as the profile to be coated, the section being such that the distance between its interior surface and the profile is constant over all around, sealing being ensured by the running speed of the profile, taking into account the viscosity of the liquid product.
  • the liquid product tends to escape between the interior surface of the cylinder and the profile over an increasing length as a function of the pressure prevailing in the tank and of the passage width, but decreasing as a function of the viscosity of the liquid. and the running speed of the profile. Therefore, it is possible to adjust the length of the joint and the passage width so that the product does not go up against the direction further than the end of the joint.
  • the coating tank is completely filled with liquid product and the liquid product inlet pipe is connected by piping to a positive displacement pump so that the flow rate of the liquid product introduced into the tank as a function of the desired thickness of the coating, the running speed of the profile and the length of its periphery.
  • the container being closed and filled with liquid, and the fact that the entry of the profile into the container is done by a tight seal, that the profile has a constant profile, and that the liquids are incompressible, it is understood that the flow rate of the liquid introduced into the tank through the conduit is equal to the total flow rate of the liquid deposited on the profile thanks to the semi-tight seal at the outlet of the profile of the tank.
  • the device according to the invention then comprises means for heating the coating tank, including the inlet seal and the semi-outlet seal.
  • the outlet joint is heated by the circulation and the heating of the liquid contained in the hollow tube.
  • the temperature of application of the liquid product is limited because it is known that the product then degrades more or less rapidly depending on the temperature, which is the case already mentioned above of the copolymer adhesives.
  • the device according to the invention is therefore equipped in this case with heating means such that the inlet seal is heated to a higher temperature than the rest of the tank.
  • inlet seal constituted by a cylinder
  • the length of the liquid rise along the inlet joint allows a large temperature exchange surface and therefore makes it possible to reduce the duration of the heat exchange, which allows the temperature of the liquid to be raised further. the fact that this takes place for a shorter time and that the degradation of the product is an increasing function of these two parameters.
  • the heating is preferably carried out by radiation.
  • This heating mode makes it possible, in fact, to raise the surface temperature of the profile while maintaining the highest possible difference between this temperature and the average temperature of the profile.
  • the purpose of raising the surface temperature of the profile is to allow it to be brought closer to the temperature of the product, so that the viscosity of the product is more maintained when in contact with the surface of the profile close to what it was before contact so that the product penetrates well inside the micro-cavities of the surface.
  • Another advantage of this rise in surface temperature is that it brings the air present in the microcavities of the profile surface to a higher temperature so that during the cooling subsequent to the course of the profile in the coating pan , the reduction in volume of this air is greater and thus contributes to better penetration of the product into the micro-cavities.
  • the purpose of the temperature difference between the surface temperature of the profile and its average temperature is to allow surface cooling as soon as the product has come into contact with the surface of the profile.
  • the cooling of the coating on the profile produced by the transfer of heat to the profile whose average temperature is lower thus makes it possible to have a higher local viscosity so that the product flows as little as possible by gravity so as not to disturb the regularity of thickness. r.
  • the profile is preferably cooled immediately after it has passed through the semi-sealed joint.
  • the installation shown in FIG. 1 comprises a storage grid 1 for sections of tubes 2 to be coated. Downstream of this storage grid is a double drive track 3 capable of pushing the sections of tubes one behind the other, for example on biconical rollers.
  • an electric radius heating furnace ment 4 capable of being traversed by the tubes then a device 5 according to the invention making it possible to coat the sections of tube 2.
  • the installation comprises downstream of the device 5 an annular extrusion head 6 then a cooling device 7 at the outlet of which the tube sections 2 are dried on a drying rack 8.
  • FIG. 2 shows the device 5 in more detail.
  • This device comprises a coating tank 9 forming a container supplied with liquid product by a pipe 10.
  • the pipe 10 has a double envelope so that a space 11 allows the circulation of a thermal fluid to heat the product liquid passing through the pipe 10.
  • the fluid circulating in the space 11 then ensures the heating of the tank 9 by circulating in a space 12 formed between the two envelopes of the tank 9.
  • the space 12 is connected to an outlet pipe 13 for the evacuation of thermal fluid.
  • the coating tank 9 has an inlet orifice provided with a seal formed by a cylinder 14 with a double envelope, the space 15 between the two envelopes being capable of being supplied with thermal fluid by a pipe 16 and a another pipe 17 being provided for the evacuation of this thermal fluid.
  • the tank 9 is itself a cylinder whose section is such that the distance between its inner envelope and the tube 2 is constant over the entire periphery . This distance is sufficient for the circulation of the product in the coating tank 9 to create no significant pressure drop.
  • the diameter of the cylinder 14 forming the inlet seal is such that, given the running speed of the tube 2 and the viscosity of the product, the liquid product contained in the enclosure 9 cannot rise up between the internal surface. of the inlet seal and the outer surface of the tube 2, beyond the end of the inlet seal.
  • the coating tank 9 also includes an outlet orifice at the periphery of which a semi-sealed outlet seal 18 is provided.
  • the seal 18 is formed of an extensible flange 19 contained in an envelope 20 (FIG. 3).
  • the inside of the flange 19 contains a liquid and is placed in communication with an expansion vessel 21 at two diametrically opposite points, and the expansion vessel is itself connected to a source of variable and adjustable compressed air pressure .
  • the expansion tank 21 is heated by an electrical resistance and a circulator circulates the liquid in the seal.
  • the flange 19 has at its internal periphery a lip 22 (FIG. 3) which, depending on the pressure in the expansion vessel 21, exerts an adjustable pressure on the external surface of the tube 2.
  • a set of nozzles 23 supplied with compressed air also makes it possible to cool the tubes 2 at the outlet of the coating tank 9.
  • the tubes thus assembled are pushed by the driving devices 3 and an adhesive tape is placed outside the junctions between tubes in order to obtain a smooth surface.
  • the tubes which then pass through the oven 4 are heated essentially in their external zone.
  • the tube 2 then passes through the device 5 inside which it is coated with the liquid product contained in the coating tank 9.
  • the flow rate of liquid product supplied by line 10 is adjusted by means of a gear pump driven by a variable speed motor as a function of the desired thickness of the coating, the speed of travel of the tubes and the diameter of the tubes; the pressure exerted by the semi-sealed outlet joint 18 and itself adjusted so that the liquid product rises as far as possible along the inlet joint (14).
  • the temperature of the thermal fluid circulating in the space 15 is chosen to be higher than that of the thermal fluid circulating in the space 12.
  • the liquid product with which the tube 2 is coated in the device 5 can for example be a copolymer adhesive.
  • the tube 2 enters the extrusion head 6 where it is coated with an extruded synthetic material such as, for example, polyethylene, in a manner known per se.
  • an extruded synthetic material such as, for example, polyethylene
  • the tube 2 is then cooled in the device 7 where nozzles 25 supplied by a conduit 26 provide a spraying of water.
  • the sections 2 are then separated and placed on the drying rack 8.
  • the invention therefore provides an installation for continuously coating tubes with adhesive products for which extrusion is more costly in terms of energy and product and for which spraying is not possible given the temperature at which this spraying should take place.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Seal Device For Vehicle (AREA)
EP80401688A 1979-11-26 1980-11-26 Dispositif pour réaliser en continu le revêtement de la surface externe d'un profilé Expired EP0029792B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80401688T ATE12076T1 (de) 1979-11-26 1980-11-26 Vorrichtung zum kontinuierlichen aufbringen einer beschichtung auf die aussenflaeche eines profils.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7929051 1979-11-26
FR7929051A FR2469960A1 (fr) 1979-11-26 1979-11-26 Procede pour realiser en continu le revetement de la surface externe d'un profile, dispositif pour sa mise en oeuvre et profile obtenu

Publications (2)

Publication Number Publication Date
EP0029792A1 EP0029792A1 (fr) 1981-06-03
EP0029792B1 true EP0029792B1 (fr) 1985-03-13

Family

ID=9232083

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401688A Expired EP0029792B1 (fr) 1979-11-26 1980-11-26 Dispositif pour réaliser en continu le revêtement de la surface externe d'un profilé

Country Status (6)

Country Link
EP (1) EP0029792B1 (enrdf_load_stackoverflow)
JP (1) JPS5689867A (enrdf_load_stackoverflow)
AT (1) ATE12076T1 (enrdf_load_stackoverflow)
DE (1) DE3070291D1 (enrdf_load_stackoverflow)
FR (1) FR2469960A1 (enrdf_load_stackoverflow)
YU (1) YU298980A (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647802B1 (fr) * 1989-06-05 1992-10-09 Bonnet Jacques Dispositif permettant de fabriquer des joncs, demi-joncs et moulures en cuir, reptile et diverses matieres souples
US6428851B1 (en) * 2000-03-01 2002-08-06 Bethlehem Steel Corporation Method for continuous thermal deposition of a coating on a substrate
FR2806091B1 (fr) * 2000-03-13 2004-02-13 Jacques Bonnet Dispositif permettant de gainer avec des matieres a textures souples, divers profiles de sections rondes et de differentes compositions
SG101445A1 (en) * 2001-04-21 2004-01-30 Jetsis Int Pte Ltd Abrasive fluid jet system
FR2838128B1 (fr) * 2002-04-05 2005-07-01 Jacques Bonnet Procede pour recouvrir un profile avec une bande de matiere souple et dispositif pour la mise en oeuvre d'un tel procede
KR101074438B1 (ko) * 2009-03-13 2011-10-17 주식회사 유진 금속튜브의 법랑코팅 방법
ITTV20130197A1 (it) * 2013-11-29 2015-05-30 W P R S R L Macchina e metodo per ricoprire dei profilati tramite una pellicola decorativa di rivestimento
KR101716247B1 (ko) 2015-12-21 2017-03-14 비에이치아이 주식회사 금속 튜브용 법랑코팅장치
CN117324209A (zh) * 2023-10-13 2024-01-02 盐城市大丰区比齐密封系统有限公司 一种橡胶密封条的施胶设备及其方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB113816A (en) * 1917-03-02 1918-03-04 William Lawes Cole Improvements relating to the Application of Coatings or the like to Bars, Rods, Pipes and so forth.
US2100587A (en) * 1936-07-06 1937-11-30 Kenneth M Chalker Apparatus for coating the interior of tubing and the like
US2194268A (en) * 1938-10-11 1940-03-19 Gardiner Coating Machine Compa Pipe coating device
US2442335A (en) * 1943-05-03 1948-06-01 American Viscose Corp Coating device
US3374766A (en) * 1962-07-25 1968-03-26 Jack W. Weaver External pipe and tube coating apparatus
GB1122021A (en) * 1964-06-05 1968-07-31 Kodak Ltd Coating method and apparatus
US3379766A (en) * 1964-12-31 1968-04-23 Union Oil Co Process for the production of higher alkanones from lower alkanones
FR1506402A (fr) * 1966-09-29 1967-12-22 Sfec Dispositif pour l'obtention d'un revêtement régulier sur une pièce tubulaire
BE726484A (enrdf_load_stackoverflow) * 1968-01-03 1969-06-16
US3889628A (en) * 1973-08-13 1975-06-17 Fischer Ag Georg Fluid material applicator

Also Published As

Publication number Publication date
FR2469960A1 (fr) 1981-05-29
YU298980A (en) 1983-02-28
ATE12076T1 (de) 1985-03-15
DE3070291D1 (en) 1985-04-18
FR2469960B1 (enrdf_load_stackoverflow) 1984-04-13
EP0029792A1 (fr) 1981-06-03
JPS5689867A (en) 1981-07-21

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