EP4633827A1 - Système d'enduction de câble métallique - Google Patents
Système d'enduction de câble métalliqueInfo
- Publication number
- EP4633827A1 EP4633827A1 EP23838187.5A EP23838187A EP4633827A1 EP 4633827 A1 EP4633827 A1 EP 4633827A1 EP 23838187 A EP23838187 A EP 23838187A EP 4633827 A1 EP4633827 A1 EP 4633827A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal cable
- coating
- circumferential groove
- applicator
- applicator roller
- 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.)
- Pending
Links
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
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0813—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by means for supplying liquid or other fluent material to the roller
-
- 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
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0808—Details thereof, e.g. surface characteristics
-
- 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
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0817—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by means for removing partially liquid or other fluent material from the roller, e.g. scrapers
Definitions
- the present invention relates to the field of coating metal cables, in particular with a coating substance such as an adhesive, and which can in particular be used in the field of tires.
- Metallic reinforcements are often used in vehicle tires, these metal reinforcements generally being in the form of metal cables.
- One of the existing problems concerns the adhesion of these metal cables to the rubber used to form the tire.
- additives in the rubber such as for example sulfur and/or cobalt salt, these additives reacting during the vulcanization step used during the formation of the tire, in order to make the rubber adhere to the metal cables.
- sulfur and/or cobalt salt these additives reacting during the vulcanization step used during the formation of the tire, in order to make the rubber adhere to the metal cables.
- These additives are, however, polluting and we are seeking to remove them from the rubbers used to form tires.
- An aim of the present invention is to propose a coating system which will make it possible to directly coat one or more metal cables with a coating substance, such as an adhesive substance.
- a coating substance such as an adhesive substance.
- the advantage of such a system is to provide metal cables which will have been prepared to have an adhesive sheath, so that adhesion with the rubber of the tire can be done easily, particularly during the vulcanization step carried out during tire manufacturing.
- an aim of the present invention is to propose a coating system making it possible to prepare metal cables at high production speeds and compatible with industrial tire manufacturing rates.
- a coating system is sought that allows the metal cables to be coated to run at a speed of at least 80 m/min, or even at least 200 m/min.
- Another aim of the present invention is to propose a coating system which allows coating of several metal cables simultaneously, effective coating metal cables, in particular without excessive loss of the coating substance, and a regular and homogeneous distribution of the coating substance on each coated metal cable.
- Another aim of the present invention is to propose a metal cable coating system whose installation is simple and at reduced cost, in particular to limit the overall cost of the tire production line. It is also sought to have a coating system with the most optimized and compact footprint possible, particularly in relation to the industrial tire production site.
- a system for coating at least one metal cable with a coating substance, comprising a frame on which are mounted:
- a guiding device designed to guide the metal cable in a coating direction that is substantially horizontal relative to the frame
- an applicator roller intended to be rotated in a direction of application rotation and having a cylindrical wall in which a circumferential groove is formed, the circumferential groove being intended to receive the metal cable;
- a doctor blade chamber comprising a reservoir intended to contain the coating substance, the reservoir having an opening positioned opposite the applicator roller to fill the circumferential groove with coating substance, the doctor blade chamber further comprising a doctor blade positioned downstream of the opening of the reservoir in the direction of rotation of application and being intended to remove an excess of coating substance present on the applicator roller; in which the applicator roller is arranged on the frame so that the circumferential groove receiving the metal cable is above the metal cable, so that in operation the metal cable is coated from above.
- the guiding device is designed to guide the metal cable in a coating direction tangent to the circumferential groove.
- the guide device comprises a lifting roller on which the metal cable is intended to be driven, the lifting roller being positioned upstream of the applicator roller with respect to the direction of drive of the metal cable and below the applicator roller with respect to to the building.
- the scraper is designed to remove the coating substance present in the circumferential groove in order to measure the quantity of coating substance available for coating the metal cable.
- the circumferential groove has a maximum depth defined relative to the level of the cylindrical wall of between 50% and 200% of an average diameter of the metal cable, preferably between 100% and 190% of the average diameter of the metal cable, and preferably still of the order of 180% of the average diameter of the metal cable.
- the circumferential groove has a shape open towards the outside with side walls forming an angle a of between 35° and 90°, preferably between 55° and 65°, and more preferably of the order of 60°.
- the circumferential groove has a rounded bottom defined by a radius greater than an average radius of the metal cable, preferably a radius greater than 110% of the average radius of the metal cable, and more preferably a radius of between 110% and 120 % of the average radius of the metal cable.
- the coating system comprises several metal cable guiding devices for guiding the metal cable in a substantially horizontal coating direction relative to the frame, and in which the applicator roller of the applicator device comprises several circumferential grooves formed on the cylindrical wall parallel to each other, each circumferential groove being designed to receive a metal cable guided by one of the guide devices.
- the applicator device is configured to drive the applicator roller at a rotation speed of between 0.1 and 2 times a drive speed at which the metal cable is driven.
- the applicator device is configured to drive the applicator roller at a rotation speed of the order of 1.5 times the drive speed at which the metal cable is driven.
- the coating system comprises a drive device configured to drive the metal cable at a drive speed of at least 20 m/min, preferably a speed of at least 80 m/min, more preferably a speed of at least 200 m/min.
- the coating system further comprises an oven device positioned downstream of the applicator device in the driving direction of the metal cable and in which the metal cable coated with the coating substance is driven along the driving direction substantially horizontal in relation to the frame.
- FIG. 1 is a top perspective view of the proposed coating system, with its frame;
- FIG. 2 is a schematic illustration of the proposed coating system in a perspective view from above, in which the applicator roller is cut transversely along a groove;
- FIG. 3 is a schematic illustration of the proposed coating system in a side view
- FIG. 4 is a schematic illustration of the coating system proposed in a perspective view from below, in which the applicator roller is cut transversely along a groove;
- FIG. 5 is an enlargement of the view of Figure 1 at the level of the coating zone by the proposed coating system
- FIG. 6 illustrates the relative speeds and flow rates at the level of the coating zone of the coating system of Figure 1;
- Figure 7 illustrates the coating system of Figure 2 in the disengaged position
- FIG. 8 is a sectional view illustrating a section of an example of a groove provided in the applicator roller of the proposed coating system.
- metal cable we mean a set of several metal wires, arranged together, in particular by braiding, to form the structure of the metal cable.
- a metal cable is generally made up of a few dozen metal wires, which limits the adhesion surface, unlike a textile cable which generally has several thousand intertwined wires.
- a metal cable of 1 mm 2 in diameter and intended to be used to form a metal reinforcement of a tire can have around twenty intertwined metal wires, in particular 24 metal wires.
- Figure 2 illustrates the coating system proposed and planned for coating at least one metal cable 1 with a coating substance 2.
- the coating substance 2 will preferably be an adhesive substance, in particular for an application in the field of tires, but could be any other type of coating substance.
- the viscosity of the coating substance is preferably between 100 cP and 1000 cP, for example between 400 cP and 500 cP.
- Adhesive substances that can be used for the coating of metal cables intended to be embedded in tire rubber are for example aqueous glues (or other solvents), resins, etc.
- the proposed coating system preferably comprises a frame 30 on which the various elements composing it are mounted, as illustrated in Figure 1. It should be noted that this frame 30 could be broken down into several frame sections that are independent of each other but can be coupled to each other.
- the frame 30 is intended to be positioned on the floor of the building in which the coating is carried out.
- the coating system firstly comprises a metal cable guiding device 10 designed to guide the metal cable 1 in a coating direction (De) substantially horizontal relative to the frame 30, as shown in Figures 2 to 6 .
- the coating direction (De) corresponds to the direction of travel of the metal cable 1 at the level of the coating zone which will be described in detail later. We can say that the coating is carried out horizontally.
- this direction of coating is horizontal so that the coated metal cable 1 can continue to run horizontally at the exit of the coating system, without having to undergo any change of direction.
- the guiding system 10 also makes it possible to control the direction of travel (Dd) of the metal cable 1 upstream of the coating system in relation to the direction of training of the metal cable 1. This direction of training is represented by the associated arrow to the coating direction (De) illustrated in the figures.
- This direction of travel (Dd) of the metal cable 1 upstream of the coating system can also be substantially horizontal relative to the frame 30, just like the direction of coating (De).
- the direction of travel (Dd) of the metal cable upstream of the coating system is however inclined relative to the direction of coating (De) as is for example represented in Figures 3 and 7.
- This allows in particular to reduce the size of the coating system. Indeed, we can thus envisage having a reel on which the metal cable to be coated is wound, which would be placed in the lower part of the coating system in relation to the frame 30.
- the guide device 10 can for example comprise a lifting roller 11 designed to achieve a change of direction between the direction of travel (Dd) of the metal cable upstream of the coating system and the direction of coating ( Of).
- a lifting roller 11 will be described in detail later.
- the guide device 10 can include several guide members, in particular in the form of rollers or pulleys, which control any change in direction of the metal cable 1.
- the guide device 10 preferably does not comprise any guide member downstream of the coating zone, in particular no guide member which would create a point of contact with the coated metal cable 1, and therefore would deteriorate the quality of the coating.
- the coating system comprises an applicator device 20 provided for application of the coating substance 2 on the metal cable 1 guided by the guide device 10
- the applicator device 20 comprises an applicator roller 21 intended to be rotated in a direction of application rotation (Ra).
- This applicator roller 21 has the particularity of having a circumferential groove 210 provided to receive the metal cable 1.
- the applicator roller being of substantially cylindrical shape, it has a cylindrical wall 211 in which such a circumferential groove 210 is formed.
- roller applicator 21 having several circumferential grooves 210 formed parallel to each other in the cylindrical wall 211.
- applicator device 20 comprises a doctor blade chamber 22 comprising a reservoir 220 designed to contain the coating substance 2.
- This doctor blade chamber 22 makes it possible to transfer the coating substance 2 onto the applicator roller 21, and more particularly into the circumferential groove 210, in order to then be able to transfer this coating substance to the metal cable 1.
- the reservoir 220 has an opening 221 positioned opposite the applicator roller 21 to fill the circumferential groove 210 with coating substance 2.
- the doctor blade chamber 22 further comprising a doctor blade 222 positioned downstream of the opening 221 of the reservoir 220 in the direction of rotation of application Ra.
- a scraper 222 is preferably provided to remove an excess of coating substance 2 present on the applicator roller 21.
- the scraper 222 is provided to remove the coating substance 2 present in the circumferential groove 210 in order to dose the quantity of coating substance 2 available for the coating of the metal cable 1.
- the scraper 222 makes it possible to leave a precise quantity of coating substance 2 inside the circumferential groove 210 and to remove all the excess in relation to this dosed quantity.
- a scraper 222 allows a precise, uniform and homogeneous dosage of the coating substance 2 in the circumferential groove 210, and this all along the circumferential groove 210. This is in particular thanks to this precise dosage that the coating is regular, uniform and homogeneous along the metal cable 1.
- the applicator roller 21 is arranged on the frame 30 so that the circumferential groove 210 receiving the metal cable 1 is above the metal cable 1, so that in operation the metal cable 1 is coated from above.
- the metal cable 1 it is particularly advantageous to coat the metal cable 1 from above, that is to say on the upper side of the metal cable 1, which is called the top or the back of the metal cable 1.
- the lower side of the cable metal cable 1, which is called the underside or belly of the metal cable 1 faces the ground.
- the coating substance 2 is mainly transferred from the circumferential groove 210 to the top of the metal cable 1, this coating substance 2 can then be further distributed on the metal cable 1 by the effect of gravity. It was found that the proposed coating system allowed cable coating particularly uniform metal all around the metal cable, which is due in particular to this coating from above.
- the proposed coating system allows precise coating of the metal cable 1 so that there is no excess coating substance on the coated metal cable 1 which would have to be removed. No post-coating operation is necessary to remove excess coating substance; in particular there is no subsequent scraping or spinning.
- Figure 6 highlights the dynamic phenomena which take place within the contact zone between the metal cable 1 and the circumferential groove 210, after the metal cable 1 has been coated with the coating substance 2.
- the circular arrows of Figure 6 represent the circulatory movements taking place within the upper meniscus of coating substance 2 existing above the metal cable 1 just after its passage in the circumferential groove 210.
- part of the substance of coating 2 leaves again in the circumferential groove 210 upwards with a flow rate greater than the flow rate of the coating substance 2 leaving with the coated metal cable 1.
- This higher flow rate can in particular be imparted thanks to an excess speed of the roller in relation to the running of the metal cable as will be seen later.
- the guide device 10 is therefore intended to guide the metal cable 1 below the applicator roller 21, the coating direction (De) imparted by this guide device 10 being adjacent to the applicator roller 21, so that the metal cable 1 enters the circumferential groove 210 from the direction of travel (Dd) of the metal cable 1 upstream of the coating system.
- the guide device is intended to guide the metal cable in a coating direction (De) tangent to the circumferential groove, as illustrated in Figure 3 in particular.
- the guide device 10 preferably comprises a lifting roller 11 on which the metal cable 1 is intended to be driven.
- a lifting roller can be mounted in free rotation or be rotated by specific drive means, the rotation (Re) of the lifting roller 11 accompanying the direction of travel of the metal cable 1.
- the lifting roller 11 is positioned upstream of the applicator roller 21 relative to the direction of drive of the metal cable 1.
- the lifting roller 11 is positioned below the applicator roller 21 relative to the frame 30.
- the lifting roller 11 is not entirely under the applicator roller 21.
- the highest position of the lifting roller 11 is higher than the lowest position of the applicator roller 21, all in relation to the frame 30.
- Such a configuration makes it possible to properly penetrate the metal cable 1 into the circumferential groove 210, for better application of the coating substance 2 on the metal cable 1.
- the applicator device 20 can be movable relative to the guide device 10 in particular relative to the lifting roller 11. This makes it possible, for example, to more easily clean the applicator device 20, or can be advantageous for any maintenance operation for example.
- Figure 7 illustrates the coating system in the disengaged position, that is to say when the applicator device 20 is at a distance from the guide device 10, and therefore from the metal cable 1. To start a coating, it is necessary to put the coating system in an engaged position, by moving the applicator device 20 relative to the lifting roller 11 of the guide device 10, for example according to a movement as illustrated with the arrow in dotted line in Figure 7.
- the very precise dosage of the coating substance 2 in the circumferential groove 210 made possible in particular by the blade 222 of the blade chamber 22, in combination with the specific arrangement of the applicator device 20 in relation to the metal cable 1 which allows coating from above the metal cable 1 is particularly advantageous since it also allows a quality coating of the metal cable 1 whatever the running speed of the metal cable 1, in particular for high running speeds.
- the metal cable 1 can be moved at a speed of at least 20 m/min, preferably a speed of at least 80 m/min, more preferably a speed of at least 200 m/min.
- the coating system may comprise a drive device configured to drive the metal cable 1 at a corresponding drive speed (Ve).
- the applicator device 20 is for example configured to drive the applicator roller 21 at a rotation speed (Va) of between 0.1 and 2 times the drive speed (Ve) at which the metal cable 1 is driven.
- the applicator device 20 is configured to drive the applicator roller 21 at a rotation speed (Vr) of the order of 1.5 times the drive speed (Ve) at which the metal cable 1 is driven.
- Vr rotation speed
- Ve drive speed
- the applicator roller 21 comprising several circumferential grooves 210 formed on the cylindrical wall and parallel to each other.
- the coating system comprises in this case several guiding devices 10 for different metal cables 1, each circumferential groove 210 of the applicator roller 21 being designed to receive a metal cable 1 guided by one of the guiding devices 10.
- the coating system prefferably includes heating elements designed and arranged to heat the applicator roller 21, in particular at the level of the circumferential groove 210, and/or to directly heat the reservoir 220 of the chamber. scrape 20.
- Such heating elements make it possible in particular to heat the coating substance 2, which can be advantageous for fluidizing a coating substance 2 which would be too viscous to be applied, such as for example for a resin or a coating substance without solvent.
- Such heating elements may for example include heating resistors or heating cartridges arranged specifically in the coating system.
- the shape of the circumferential groove 210 can be optimized.
- the circumferential groove 210 preferably has a maximum depth (P) defined relative to the level of the cylindrical wall of between 50% and 200% of the average diameter of the metal cable 1. More preferably, the maximum depth (P) is between 100% and 190% of the average diameter of the metal cable, and more preferably of the order of 180% of the average diameter of the metal cable.
- the circumferential groove 210 can also have a shape open towards the outside with side walls forming an angle a of between 35° and 90°, preferably between 55° and 65°, and more preferably of the order of 60°.
- the circumferential groove can have a rounded bottom defined by a radius (R) greater than an average radius of the metal cable 1.
- the radius (R) defining the rounded bottom of the circumferential groove can for example be greater than 110% of the average radius of the metal cable 1, and preferably be between 110% and 120% of the average radius of the metal cable 1.
- Figure 8 illustrates a particular example of a circumferential groove profile particularly suitable for the coating of metal cables with the proposed coating system.
- the maximum depth (P) is of the order of 180% of the diameter means of the metal cable 1
- the angle a defining the opening of the circumferential groove is of the order of 60°.
- the profile of the circumferential groove 210 is thus optimized so that the coating substance 2 easily fills this circumferential groove 210 from the opening 221 of the doctor blade chamber 22. It is also advisable not to saturate this circumferential groove 210 with the coating substance 2, which is favored by the particular profile described.
Landscapes
- Coating Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2213647A FR3143387B1 (fr) | 2022-12-16 | 2022-12-16 | Système d’enduction de câble métallique |
| PCT/FR2023/052012 WO2024126955A1 (fr) | 2022-12-16 | 2023-12-14 | Système d'enduction de câble métallique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4633827A1 true EP4633827A1 (fr) | 2025-10-22 |
Family
ID=85569568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23838187.5A Pending EP4633827A1 (fr) | 2022-12-16 | 2023-12-14 | Système d'enduction de câble métallique |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4633827A1 (fr) |
| CN (1) | CN120344324A (fr) |
| FR (1) | FR3143387B1 (fr) |
| WO (1) | WO2024126955A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1020433A (en) * | 1962-09-10 | 1966-02-16 | Westinghouse Electric Corp | Apparatus for coating wire |
| JP4836372B2 (ja) * | 2000-10-20 | 2011-12-14 | リンテック株式会社 | コーティング方法およびロッドコータ |
| CN203886738U (zh) * | 2014-03-18 | 2014-10-22 | 苏州鼎机新能源材料科技有限公司 | 一种涂布机的涂布头 |
-
2022
- 2022-12-16 FR FR2213647A patent/FR3143387B1/fr active Active
-
2023
- 2023-12-14 WO PCT/FR2023/052012 patent/WO2024126955A1/fr not_active Ceased
- 2023-12-14 EP EP23838187.5A patent/EP4633827A1/fr active Pending
- 2023-12-14 CN CN202380085183.9A patent/CN120344324A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN120344324A (zh) | 2025-07-18 |
| FR3143387B1 (fr) | 2024-12-13 |
| WO2024126955A1 (fr) | 2024-06-20 |
| FR3143387A1 (fr) | 2024-06-21 |
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