EP3453462A1 - Trommel zur aufbringung einer antikorrosionsbeschichtung durch tauch-schleuder-technik auf losen teilen und insbesondere zur aufbringung einer antikorrosionsbeschichtung in der wässrigen phase - Google Patents

Trommel zur aufbringung einer antikorrosionsbeschichtung durch tauch-schleuder-technik auf losen teilen und insbesondere zur aufbringung einer antikorrosionsbeschichtung in der wässrigen phase Download PDF

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Publication number
EP3453462A1
EP3453462A1 EP18193929.9A EP18193929A EP3453462A1 EP 3453462 A1 EP3453462 A1 EP 3453462A1 EP 18193929 A EP18193929 A EP 18193929A EP 3453462 A1 EP3453462 A1 EP 3453462A1
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EP
European Patent Office
Prior art keywords
drum
parts
bulk
flanges
centrifugation
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.)
Withdrawn
Application number
EP18193929.9A
Other languages
English (en)
French (fr)
Inventor
Denis Begue
Richard GERY
Yan LAHAYE
Laurent SCHITTER
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.)
NOF Metal Coatings Europe
Original Assignee
NOF Metal Coatings Europe
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 NOF Metal Coatings Europe filed Critical NOF Metal Coatings Europe
Publication of EP3453462A1 publication Critical patent/EP3453462A1/de
Withdrawn legal-status Critical Current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
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
    • B05C3/04—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material with special provision for agitating the work or the liquid or other fluent material
    • B05C3/08—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material with special provision for agitating the work or the liquid or other fluent material the work and the liquid or other fluent material being agitated together in a container, e.g. tumbled
    • 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
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/025—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the objects or work being present in bulk
    • B05B13/0257—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the objects or work being present in bulk in a moving container, e.g. a rotatable foraminous drum
    • 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
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
    • B05C3/09—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles
    • B05C3/10—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles the articles being moved through the liquid or other fluent material
    • 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
    • B05C7/04—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work the liquid or other fluent material flowing or being moved through the work; the work being filled with liquid or other fluent material and emptied
    • 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
    • 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
    • B05D2258/00—Small objects (e.g. screws)

Definitions

  • the present invention is part of the technical field of the protection of metal parts, by anticorrosive chemical treatment.
  • It relates in particular to a drum for applying anticorrosive coating by dipping-centrifuged on small parts arranged in bulk, such as automotive hardware parts.
  • the quenched centrifugation consists of immersing loose pieces in a bath containing a treatment agent and then spinning them by centrifugation in a drum rotating at high speed.
  • This centrifugation step must eliminate the volumes of anticorrosion coating (eg an aqueous coating) in excess on the surface of the parts.
  • anticorrosion coating eg an aqueous coating
  • it is particularly relevant for a typology of metal parts having grooves or hollow impressions in which the surface treatment agent is likely to accumulate.
  • Machines for this purpose have cylindrical drums with a horizontal axis, which are used both for soaking in the anticorrosive coating bath and for the dewatering step.
  • a cylindrical drum may comprise on the one hand a cylindrical body pierced (grid or sheet pierced with a multitude of holes) and on the other hand, at one and the other of its two ends, full flanges which ensure the mechanical maintenance of the drum, and its rotational mounting in the machine.
  • a mechanism of the machine allows to bring the drum and the treatment bath, so that the drum is immersed in the latter for a predetermined duration.
  • the drum leaves the treatment bath and is then rotated at high speed on its axis. These operations are typically conducted at room temperature.
  • a horizontal-axis drum is particularly advantageous for this quench-centrifuged cycle, in particular for parts having hollow cavities, since this improves the emptying of the hollow cavities during the centrifugation stage and allows better mixing of parts.
  • the drum is driven in slow rotation and the pieces are found alternately in motion in the volume of product and moving out of this volume. This limits the accumulation of coating on the surface of the parts and removes the air bubbles present in the hollow impressions, compared to an immersion where the drum is positioned along a vertical axis and where each piece is immersed in the product throughout of the immersion stage.
  • a volume of anticorrosion coating in aqueous phase (as opposed to a volume in solvent phase), such as GEOMET®, is advantageous in terms of environmental performance and odor reduction at the treatment sites.
  • the chemical compound providing the anticorrosion properties, such as zinc, is then dissolved in water.
  • the depositor has set up an extraction of air in the enclosure which receives the tank filled with coating and the drum, making sure that there is circulation of fluid inside the drum. This solution proved to be totally ineffective and did not achieve the expected quality levels in the field for this type of room.
  • the present invention aims in particular to overcome this lack of the prior art.
  • a drum for the dip-centrifuged application of a coating in aqueous phase on the surface of bulk parts including the two lateral flanges (faces orthogonal to the axis of rotation of the cylindrical body, and which close the body) are provided with numerous regular perforations allowing better air circulation during centrifugation, to limit the humidity of the air within the drum body. These perforations are distributed over a portion of the outer surface or over the entire outer surface of the cylindrical body and the flanges.
  • This device is adapted to integrate on standard-type quenched-centrifuged bulk treatment lines, in place of known quench-centrifuged drums such as the drum shown in FIG. figure 2 , comprising a cylindrical body 2 closed by two flanges 3 substantially planar, not perforated on their outer surface.
  • This solution takes advantage of the air movements already existing around the drum during the centrifugation step, at the level of the flanges of the basket, by allowing air currents to enter through the perforations formed in said flanges, and to reduce the relative humidity within the drum.
  • the invention relates to a centrifuge drum for receiving a multitude of bulk parts and adapted to perform the dipping-centrifuged application of a coating on the surface of the bulk parts, comprising a cylindrical drum body with a multitude of perforations and admitting an axis of rotation, and comprising two lateral flanges closing the cylindrical body, each of these flanges having at least one zone pierced with a multitude of perforations.
  • the pierced zone or zones of a lateral flange extend over at least 50% of the surface of the flange.
  • the non-pierced zone or zones of a flange represent less than 40%, or even preferably less than 30% of the total surface thereof.
  • the density of perforations (the ratio between the surface which has been removed from the material of the flanges to form the perforations, and the total surface of the flanges before perforation) may be greater than 40%.
  • a material of the flanges of the drum body may be perforated metal sheet, or alternatively, be a metal grid.
  • the perforations of the flanges are substantially of the same size, and the width of the perforations made is between 2.5 and 3 millimeters.
  • the flanges may also be provided with flow direction vanes. air surrounding the flanges, a fin comprising a fin surface forming a non-zero angle with the flange surface, as well as an air inlet opening.
  • the two flanges are provided with fins.
  • a finned flange is divided into two half-disc shaped areas, a first half-disc in which the fins are oriented in a certain direction, and a second half-disc in which the fins are oriented. in the opposite direction.
  • the volume inside the cylindrical drum body and the flanges is separated into two chambers that can be loaded and unloaded independently of one another.
  • the invention is directed to a dip-centrifuged machine comprising a quenched-centrifuged drum of the invention, as well as a tank for liquid coating of dimensions allowing the drum to be introduced therein, and mechanical elements. allowing the drum to move relative to the bowl and rotating the drum about its axis.
  • a dip-centrifuged processing machine comprises in particular the following elements: a tank 5 of parallelepipedal shape, adapted to contain a volume of anti-corrosion coating in aqueous phase such as GEOMET®, and a drum 1, of axis of rotation A, whose dimensions are adapted to be able to enter completely into the tank 5.
  • a mechanical assembly 8 called drum rocker, including including grippers which allow to grasp the axis A of the drum 1 by the sides on the axis A.
  • the drum rocker moves the drum 1 to vary its position within the machine quenched-centrifuged treatment.
  • the drum 1 can be suspended by its axis of rotation A, or be arranged on a drum support 7 not present on the figure 3 , which will be described below.
  • the tank 5 comprises a parallelepipedal container 50, open on its upper face.
  • the container 50 may contain a volume of coating to be applied to bulk parts. It can also contain the whole drum 1, if the latter is placed inside.
  • the cover 51 can be in the closed position to close the upper face of the container 50, or, as is the case on the figure 3 , in open position.
  • the axis A of the drum 1 can be grasped by the rocker 8 to move the drum 1 between a first loading position / unloading parts, and a second immersion position where the drum 1 is suspended above the tank 5
  • the steps of relative movement of the drum 1 and the tank 5 will be described below in connection with the Figures 8A to 8I .
  • the Figures 4 to 6 represent the quenched-centrifuged drum 1 of the figure 3 , resting on a drum stand 7. On the Figures 4 to 6 the drum 1 is not in the dip-centrifuged processing machine.
  • the drum 1 comprises a cylindrical body 2 and flanges 3 which close the cylindrical body 2 on the sides to form a closed cylinder admitting the axis A as axis of rotation. In all these figures, the drum 1 is in a position such that the axis A is parallel to the horizontal.
  • the cylindrical body 2 and the flanges 3 are here made of perforated stainless steel sheet of quality V2A.
  • the axis A of symmetry of revolution of the side wall 2 is an axis of rotation of the drum 1.
  • the element 70 visible on the figures 4 and 5 willing on the axis A of rotation of the drum 1, is a toothed cylinder, which can couple with a rotation motor, in particular for the rotation of the drum during the loading / unloading of parts phase and for the rotation of the drum during the phase centrifugation.
  • the element disposed on the other side of the drum 1 on the axis A, symmetrically to the toothed cylinder, is a frustoconical guide axis, which can be positioned in a bearing.
  • the elements 70 make it possible to control the rotation and the fixing of the drum 1.
  • the drum 1 rotates at a high speed about its axis of rotation A. which is preferably in a horizontal position.
  • the two flanges 3 are on a major part of their surface (that is to say on at least 50% of their surface, preferably at least 60%, and even more preferably, at least 70%) pierced with a multitude of perforations. . These perforations are for example of dimensions and distributions identical to those present on the cylindrical body 2.
  • the perforated areas 30 of the flanges 3 correspond to the volumes of the interior of the cylindrical body 2 which are intended to contain the parts during the immersion, dewatering and centrifugation steps, namely two chambers 6a and 6b (described in FIG. relationship to figure 7 below).
  • the unperforated zones 31 of the flanges 3 correspond, for their part, to the volumes of the inside of the cylindrical body 2 which serve to load parts inside the drum 1, and which do not contain parts during these three steps. times the volume of the closed drum.
  • cylindrical body 2 and the flanges 3 are here made of corrugated metal sheet. Said undulations are regular and in the form of circular arcs. Under the effect of these corrugations, on the cylindrical body 2, the depth of the wall varies radially, and on the flanges 3 the depth of the wall varies in the direction orthogonal to the flanges (direction parallel to the axis A).
  • the cylindrical body 2 and / or the flanges 3 could be formed of a metal grid. It would be important here to provide a distance between the grid bars that allows the mechanical strength of loose parts arranged inside the drum 1, taking into account the possible small dimensions of these parts. However, the grid must also be sufficiently porous to pass the volume of liquid coating contained in the tank 5 inside the drum 1 during a quench-centrifuged cycle.
  • Each of the perforations made in the corrugated sheet of the cylindrical body 2 and the flanges 3 is small: fifteen millimeters in length, and three millimeters in width.
  • the width of the perforations may be between 2.5 and 3 millimeters.
  • the size of the perforations must make it possible to guarantee sufficient mechanical strength of the drum 1, to ensure good air circulation within the drum and good evacuation of the excess coating after the soaking step, and must not not generate a risk of blockage in the drum walls of small parts treated. With the dimensions of the perforations made here, it is possible to treat M4 - M5 screw diameters without the risk of jamming them in the walls. A higher perforation width would increase this risk of jamming.
  • the perforations formed in the walls of the drum 1 are in the shape of a semicircle, but they may alternatively be disk-shaped, or any other form that can be made without difficulty of excessive manufacture on a sheet.
  • the entire cylindrical body 2 consists of perforated plate, and the entire surface of the flanges 3 is perforated (surface 30) excluding the immediate vicinity of the ends of the shaft, and for each of the flanges 3, excluding the two symmetrical surfaces 31 which correspond to the coin loading spaces.
  • the perforations are here distributed in parallel lines with respect to each other, firstly on the cylindrical body 2, and secondly on each of the flanges 3.
  • a line of perforations may for example be placed on each embossing of the corrugated sheet forming the cylindrical body 2 and the flanges 3, so that the perforations are aligned with the corrugations of the sheet.
  • the perforations could be distributed according to any other geometry that would not induce an excessive manufacturing difficulty of the walls of the drum.
  • the perforations could be distributed radially in concentric circles around the axis A.
  • the perforations made in the cylindrical body 2 and in the flanges 3 are very close to allow air currents to enter at all levels of said walls, during the rotary movement of the drum 1 about its axis A.
  • the distance maximum between two consecutive perforations on each perforation line is less than the maximum dimension of the perforations, namely fifteen millimeters, so as to form a dense network of perforations.
  • a density of perforations ratio of the surface removed to form all the perforations of the flanges 3, on the surface of the flanges 3 before perforations is greater than 40%.
  • the flanges 3 also have fins 4 of air flow orientation.
  • the fins 4 encourage the circulation of air on the sides of the drum during centrifugation.
  • Each of the fins 4 visible in figure 5 comprises a fin surface 40 formed of a metal plate (solid or perforated).
  • a fin 4 is here welded to a flange 3 so as to produce this surface 40 with a non-zero angle relative to the flange 3, preferably with an acute angle of the order of 5 to 45 degrees.
  • the fin is folded on two sides, and the two sides thus folded (for example with an angle of 90 degrees relative to the fin surface 40) are also welded to the flange 3.
  • This fin structure 4 forms an air intake opening 41, substantially rectangular, which is even larger than the angle between the fin surface 40 and the flange 3 is of high measurement.
  • other configurations of fins 4 giving rise to air intake openings 41 capable of bringing air into the drum 1 during centrifugation could be envisaged.
  • the two flanges 3 of the drum 1 are provided with fins 4.
  • each of said half-discs may comprise three fins 4.
  • the three fins 4 are oriented so that their air intake opening 41 is directed to the left of the figure.
  • the three fins 4 ' (which are not all visible because hidden by a support drum) are oriented so that their air intake opening 41' is directed to the right on the Fig.
  • sets of fins 4 and 4 'respectively disposed on one and the other of the flanges 3 may be configured to allow air inlet respectively when the drum 1 rotates clockwise, and when it rotates in the direction counterclockwise.
  • the volume contained inside the cylindrical body 2 and the flanges 3 is divided into two chambers 6a and 6b not communicating with each other, these two chambers being designed in a completely symmetrical manner.
  • the elements of the drum 1 for loading and unloading these chambers 6a and 6b.
  • the chamber 6a is in an open position, that is to say that it is possible to load parts through an opening 60a. This is due to the position of the door 61a, mounted in rotation about the axis A '. Indeed, the door 61a is in a position where the partition 63a, integral with the door 61a, does not obstruct the opening 60a. On the other hand, it is not possible, in the position illustrated by the figure 6 , to load coins in room 6b.
  • the door 61b is, on the figure 6 , in a position in rotation about its axis A "which is such that the opening 60b is obstructed by the partition 63b.
  • the arcuate walls 62a and 62b, they are fixed and permanently delimit the corresponding space to the chambers 6a and 6b, it is therefore the rotation of the doors 61a and 61b around their axes A 'and A ", both parallel to the axis A of the drum, which makes the chambers 6a and 6b are in the position of loading / unloading or in closed position.
  • the latter must remain closed during the parts immersion, dewatering and centrifugation steps, but must be open, consistent with the position of the drum 1, during the loading and unloading of parts.
  • FIG. 7 A complete anticorrosion treatment cycle of bulk metal parts, in a particular embodiment, is shown in block diagram form. figure 7 .
  • the drum support 7 is not included in the space of the dip-centrifuged processing machine.
  • the drum 1 can for example be positioned in the space of the processing machine with its support 7, then be suspended to stay in the space of the processing machine while the support 7 is removed from the machine.
  • the drum 1 is thus in the position illustrated by the figure 8A , where it is suspended by its axis A.
  • the tank 5 is in the low position, its cover 51 closed on its tank body 50.
  • a first loading step 100 loose pieces 10 are loaded first in the chamber 6a, then in the chamber 6b.
  • the drum 1 does not change position relative to the tank 5.
  • the drum 1 is rotated about its axis A.
  • the drum 1 is first rotated so that the opening 60a is turned upwards. Then the door 61a goes into a position where the opening 60a is no longer obstructed, to allow to load parts 10 in the chamber 6a, after which the assembly is in the position of the Figure 8B . Then the drum 1 rotates to a position where the opening 61b is directed upwards, and the same operations are implemented to load parts in the chamber 6b, after which the assembly is in the position of the Figure 8C .
  • step 200 of immersion The drum 1 is driven by the tongs of the rocker 8 to be transferred above the tank 5.
  • the lid 51 has previously been opened, so that the drum is suspended above the free top opening of the bowl body 50. The whole is in the position of the figure 8D .
  • the tank 5 is raised to an intermediate position, higher than its lower position of the step 100, and the cover 51 is closed so as to enclose the drum 1 in the volume created by the tank body 50 and the cover 51.
  • the tank 5 is placed on a lift support (or elevator) operated manually or automatically so that its vertical position can be controlled.
  • the whole is in the position of the figure 8E .
  • the tank 5 is mounted by the lifting support to a third impregnation position, higher than the intermediate position (the drum 1 remaining fixed).
  • the drum 1 is then immersed in the coating volume.
  • the drum 1 is left, preferably under slow rotation of 1 to 10 revolutions / minute, within the coating volume, for a predetermined time, for example for 10 to 60 seconds.
  • the drum could also be left immobile when the parts 10 are immersed. In this case, only the parts of one of the two chambers inside the drum 1 are impregnated.
  • the liquid coating then enters the coin treatment compartment through the perforations made in the side wall 2 and the front walls 3, until reaching the surface of the workpieces.
  • aqueous phase liquid coating bath such as lamellar zinc in solution in water.
  • This type of product is less harmful to the environment, and it is easier to dispose of liquid coating residues or to reuse them after a dip-centrifuged cycle. In addition, it causes less unpleasant odors for people working in the facilities.
  • step 300 the pieces 10 are drained. This dripping lasts from 0 to 60 seconds (so it is optional).
  • the drum is carried to the position illustrated by the figure 8F : while the drum 1 remains held in a fixed position by a motor assembly and bearing fixed on the axis A of the drum 1, the tank 5 is lowered back to its intermediate position of the step 200.
  • centrifugation step 400 executed while the assembly is still in the position illustrated by the figure 8F .
  • the drum 1 is then rotated at high speed around its axis of rotation A.
  • the centrifugation speed is significantly higher than the drum speed during immersion: it can rise for example between 150 and 400 revolutions /minute.
  • the advantages for good centrifugation of a drum 1 as described above, provided with regular perforations on all its walls and airflow orientation fins on the end walls 3, have already been discussed above.
  • the movement of the drum 1 spontaneously generates air flows around the body of the drum 1, without it being necessary to install near the drum 1 an additional blowing member. In particular, air is moved perpendicularly to the axis of rotation A, in the vicinity of the side wall 2, and over the entire surface of the front walls 3.
  • the air thus set in motion can not only rush into the perforations of the walls of the drum and come out of it, but can also be driven by the profile 40 of the fins 4 and penetrate into the drum. part of the coin treatment chamber through the apertures 41 of the fins 4.
  • a greater turnover of the air within the coin treatment chamber is generated than with a device of FIG. the prior art as presented in figure 2 .
  • the solution presented here has been shown to be effective in limiting moisture within the drum, and it has been observed that the excess coating is more effectively removed with better end results, namely a more uniform anticorrosive coating layer. end of treatment, better controlled thickness.
  • the scrap rate obtained with this configuration namely the rate of parts deemed non-compliant at the end of the cycle because having anticorrosive coating thicknesses, is equivalent to the scrap rate obtained with conventional centrifugation where the drum is placed with a spindle axis. substantially vertical rotation (it is recalled that the latter configuration is considered less advantageous for emptying the cavity hollow impressions, and for a good mixing of parts).
  • the centrifugation step 400 is for example divided into three successive sub-stages of centrifugation first in a clockwise rotation of the drum 1, then in the counterclockwise direction and finally again clockwise. The position of the drum is not changed between these three steps.
  • Each of the centrifugation substeps lasts between 10 and 60 seconds.
  • the unloading 500 can begin.
  • the lid 51 is first opened and the tank 5 returns to the same lower position as before step 100. Due to the vertical movement of the tank 5 and its opening, the drum 1 is suspended from the tank 5. The whole is in the position illustrated by the figure 8G .
  • each piece must have a thin layer of coating, which should give after drying and baking a layer weight greater than 12 g / m 2 for the dry coating.
  • the anticorrosive treatment is not finalized at this stage because the coating has to be cured and go completely into the solid state.
  • the drum is rebasculé by the clamps of the rocker 8 not to be suspended above the tank 5. Then that of the two chambers 6a and 6b which is the lowest, namely on the figure 8H the chamber 6a is discharged from its parts, the door 61a being rotated to release the opening 60a and drop the loose parts 10 after treatment. We then reach the state of the system which is represented on the figure 8H . Finally, in a sub-step 500d, the same operations are repeated to empty the chamber 61b, so that the system reaches the state shown in FIG. figure 8I .
  • a standard cycle may advantageously comprise final steps of drying the parts after centrifugation, for example at a temperature of the order of 70.degree. C., which allows a first evaporation of the liquid content of the coating, then of cooking 700, for example in an oven, at a much higher temperature, for example at a temperature of the order of 300 ° C.
  • the device described above, and the associated anticorrosive treatment process have proved to be able to deal with the starting problem, namely to obtain satisfactory results on the parts after treatment and in particular on the hollow impressions parts which are more ready to present excess cladding after treatment, using an anticorrosion coating in aqueous phase.

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EP18193929.9A 2017-09-12 2018-09-12 Trommel zur aufbringung einer antikorrosionsbeschichtung durch tauch-schleuder-technik auf losen teilen und insbesondere zur aufbringung einer antikorrosionsbeschichtung in der wässrigen phase Withdrawn EP3453462A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1758415A FR3070878A1 (fr) 2017-09-12 2017-09-12 Tambour pour application d'un revetement anticorrosion par trempe-centrifuge sur pieces en vrac, et notamment pour application d'un revetement anticorrosion en phase aqueuse

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FR (1) FR3070878A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1029995B1 (nl) * 2021-12-08 2023-07-04 Duroc Nv Werkwijze en inrichting voor het coaten van bouten en moeren

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4676187A (en) * 1986-01-22 1987-06-30 Warner-Lambert Company Tablet coating apparatus
DE102004004686A1 (de) * 2004-01-29 2005-08-18 Ing. Hubert Maldaner Gmbh Imprägniervorrichtung sowie deren Verwendung
US20050257739A1 (en) * 2003-09-25 2005-11-24 Bernhard Schaeuble Device for surface coating of small parts

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4676187A (en) * 1986-01-22 1987-06-30 Warner-Lambert Company Tablet coating apparatus
US20050257739A1 (en) * 2003-09-25 2005-11-24 Bernhard Schaeuble Device for surface coating of small parts
DE102004004686A1 (de) * 2004-01-29 2005-08-18 Ing. Hubert Maldaner Gmbh Imprägniervorrichtung sowie deren Verwendung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1029995B1 (nl) * 2021-12-08 2023-07-04 Duroc Nv Werkwijze en inrichting voor het coaten van bouten en moeren

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