FR2922788A1 - Surface treating e.g. cleaning, and painting installation for e.g. metallic section of French window, has treating booth arranged on frame parallel to kiln such that longitudinal direction of booth coincides with direction of frame - Google Patents

Abstract

The installation (1) has a rectangular carrying frame (2) possessing length and width that are lesser than 22 meter and 4 meter, respectively. A kiln (7) and a spray booth (6) are arranged on the frame and extended from one another along a longitudinal direction of the frame such that longitudinal direction of the kiln and axial direction of the booth coincide with the direction of the frame. A parallelepiped surface treating booth (3) is arranged on the frame parallel to the kiln such that longitudinal direction of the booth (3) coincides with the direction of the frame. An independent claim is also included for a method for fabricating and installing a surface treating and painting installation.

Description

The invention relates to an installation for surface treatment and painting of elongate objects. BACKGROUND OF THE INVENTION "Surface treatment" is understood to mean a set of cleaning and / or degreasing and / or stripping and / or stripping and / or preparation (for example chromium-plating, phosphating, etc.) operations on these surfaces. objects, to allow the subsequent application on these surfaces of a paint or other protective coating and / or finish. These operations consist essentially in spraying the objects to be treated with various liquid treatment solutions, among which etching solutions (acidic, basic, etc.), rinsing solutions (water for example) and preparation solutions (solution). chromium-based, phosphate-based solution, chrome-free surface conversion solution ...). The invention also relates to a paint installation for painting elongated objects by means of a colored powder, projected onto the objects in the form of a suspension of powder in a gas (air for example). Furthermore, the term "surface treatment and painting installation" designates a set of devices set up, arranged and associated with each other to allow the surface treatment and painting of objects. The invention applies specifically to the surface treatment and painting of elongated objects, such as sheets, beams, profiles and in particular metal profiles used for the manufacture of joinery (windows, French windows). .). Note that it is however not limited to metal objects. There are surface treatment facilities including a long tunnel forming a succession of treatment sections and drip sections. The objects, conveyed in the tunnel by means of a conveyor, pass successively in each treatment section to be sprayed with a solution (liquid) treatment (basic attack solution, acid attack solution, solution rinsing solution, preparation solution ...). Such an installation is particularly cumbersome: a 75-meter tunnel is necessary to carry out five treatments (a basic attack, a rinsing, an acid attack, a rinsing, a preparation) on metal profiles 7 meters long. To overcome this drawback appeared surface treatment facilities comprising a cabin in which several treatments can be performed successively. Note that the cabin is sized to fully accommodate at least one object to be treated. FR 2 668 401 describes such a surface treatment plant, whose cabin is associated with four tanks of treatment solutions. The treatment solutions are successively sprayed on the object or objects present in the cabin. Each tank is equipped with a pump to route the treatment solution it contains to the spray booms of the cabin. The bottom of the cabin is pierced with a drain opening opening on a weir; the spray solution returns to the tank by gravity, the tanks being arranged under the cabin. For a complete treatment of objects, the installation preferably comprises two cabins each associated with four tanks. Such a surface treatment facility is still cumbersome. In addition, it has a high height due to the superimposed arrangement of the tanks and the cabin. A paint installation usually comprises: a paint booth, preferably sized to accommodate at least one object to be treated integrally, which booth is equipped with a projection device capable of projecting towards the object or objects present in the cabin, a gaseous flow (air for example) loaded in color powder, said diffusion flux; - feed means for the diffusion stream cabin, comprising a color powder reservoir and means for generating the flow of diffusion and transport of said stream to the projection device of the cabin, - recycling means of the color powder projected in excess in the paint booth, including suction means capable of generating a suction current and / or a depression within the paint booth to recover excess powder spray, filtering means (filters, cyclones ...) capable of separating the powder recovered, and means of transport to the powder tank of the powder thus filtered, - an oven for baking the paint. A known surface treatment and painting installation, suitable for painting elongated objects such as metal joinery profiles, generally occupies a floor area of several hundred square meters (or even 1000 m2) and has a maximum height that can exceed 7 meters. Manufacturers of active joinery generally have buildings too small to accommodate such an installation; they buy already painted profiles to make their joinery. Those wishing to acquire a surface treatment and painting facility are usually forced to build a new building dedicated to the latter. The corresponding investment is huge. In addition, the installation of such an installation in its final reception room is long and expensive in manpower and equipment: the various elements constituting the installation are generally routed separately or by subsets until local reception of the installation; these various elements are mounted (some may even be provided in parts) and arranged one after the other in the premises of the facility; their assembly is carried out in this room; individual and collective commissioning of these elements is carried out and verified in the reception area; any modifications, adjustments and other adjustments of these elements, necessary for the proper functioning of the installation, are also performed in this reception area. The aim of the invention is to provide a less cumbersome surface treatment and paint installation, as regards both its floor area and its height. The invention aims in particular to provide a facility for surface treatment and painting of elongated objects particularly compact, which can be implemented in the vast majority of existing carpentry workshops. Another object of the invention is to provide an installation that is both compact and capable of operating at production rates similar to the rates offered by known installations. The invention also aims and above all to provide a method of manufacturing and implantation of an installation surface treatment and painting that is extremely fast. Finally, the invention aims to achieve all these objectives at lower cost, by proposing on the one hand a facility for surface treatment and inexpensive painting both in terms of manufacture and operation, and secondly a manufacturing process. and implementation of the inexpensive installation both in terms of transport of equipment and labor. To this end, the invention relates to a surface treatment and painting installation of elongated objects comprising: a plurality of storage tanks for treatment solutions, a treatment cabin equipped with a spraying device of treatment solution, which treatment cabin is adapted to fully accommodate at least one elongated object to be painted, placed in the cabin so that its longitudinal direction coincides substantially with a longitudinal direction of the treatment cabin, - a circuit, said treatment circuit, between said treatment solution tanks and the treatment cabin, on the one hand for the supply of treatment solution of the spray device of the treatment cabin, and on the other hand for the return from the treatment solution sprayed to the corresponding tank, - at least one box, called a color box, for storing a colored powder, - a painting booth, equipped with a projection device of at least one gaseous flow loaded with color powder, called diffusion flux; means, called diffusion means, for generating the diffusion flux (s) from color powder taken from the color box, and for the supply of diffusion flux of the projection device of the paint booth, - means for recycling the excess color powder projected in the paint booth, - a cooking oven paint, adapted to fully accommodate at least one elongated object to be painted, placed in the oven so that its longitudinal direction coincides substantially with a longitudinal direction of the oven. In the following, the term "lower" qualifying a dimension means, unless otherwise stated, "less than or equal". Likewise, a dimension defined as being between two numerical values is greater than or equal to the supplied lower numerical value, and less than or equal to the supplied upper numerical value. In the usual way, the "length" of an element corresponds to the maximum dimension thereof in a longitudinal direction of the element; the "width" of an element corresponds to the maximum dimension thereof in a transverse direction of the element (orthogonal to its longitudinal direction); the "height" of an element corresponds to the maximum dimension of the latter in the vertical direction (given by gravity). The installation according to the invention is characterized in that: the painting booth is adapted to be traversed in an axial direction by at least one object to be painted, presented in such a way that its longitudinal direction substantially coincides with said axial direction, said paint booth having an opening at each of its axial ends for the passage of at least one object, - the treatment booth has a length of less than 22 m, - the paint booth and the furnace have a lower cumulative length at 22 m, the treatment cabin and the furnace have a cumulative width of less than 4 m, the installation comprises a support frame forming a generally rectangular platform, on which the treatment solution tanks are mounted, the cabin of the treatment circuit, the spray booth, the diffusion means, the means for recycling the colored powder, the oven and a power supply and control cabinet, 15 - the chassis has a length of less than 22 m and a width of less than 4 m, the chassis and the elements that it carries forming a so-called transportable operational unit, - the oven and the paint booth are arranged on the frame in the extension of each other in the longitudinal direction of the frame and so that the longitudinal direction of the furnace and the axial direction of the paint booth coincide substantially with the longitudinal direction of the chassis, - the treatment cabin is arranged on the frame parallel to the oven and so that its longitudinal direction substantially coincides with that of the frame. The invention extends to a method of manufacturing, and implantation in a reception area, of such a surface treatment and painting installation. The method is characterized in that the transportable operational unit is manufactured at the factory, by mounting each element of the unit on the carrying frame, said transportable operational unit is conveyed in a single piece to the reception area. , said operating unit is implanted in the reception room by placing its frame on the floor of the premises. The transportable operational unit according to the invention therefore has a template authorizing its road transport in one piece, exceptional convoy 2nd category, as defined by the French Highway Code. This unit is operational in that it includes all the elements essential to the operation of the surface treatment and painting installation. This unit integrates in particular the functions of surface treatment, painting, recycling of the color powder, as well as the power supply and control functions of the various elements of the transportable operational unit. The transportable operational unit is fully assembled in the factory. Advantageously and according to the invention, the individual and collective operation of the elements of said transportable operational unit are verified in the factory, prior to its transportation. In other words, the start-up of the surface treatment and painting installation according to the invention is carried out at the factory; the various checks and adjustments necessary for its proper functioning are carried out at the factory and not in the final reception area of the installation. The installation of the installation in the reception area is therefore extremely fast. Advantageously and according to the invention: the treatment booth has a length of less than 17 m; the booth and the oven has a cumulative length of less than 17 m; the treatment booth and the oven have a cumulative width; less than 3 m, - the chassis has a length of less than 17 m and a width of less than 3 m. Thus, the transportable operational unit according to the invention has a template authorizing its exceptional convoy road transport category 1, as defined by the French Highway Code.

In a preferred version of the invention: the treatment booth has a length of less than 15.50 m, the paint booth and the furnace has a cumulative length of less than 15.50 m, the treatment booth and the furnace has a cumulative width of less than 2.55 m, - the frame has a length less than 15, 50 m and a width less than 2.55 m. The transportable operational unit in this case has a template allowing its transport in one piece without any administrative authorization, using a conventional vehicle comprising a tractor cab and a trailer or semi-trailer (for example plateau) , usually used for the transport of a container), able to circulate on the vast majority of the road network (French, European and worldwide). Advantageously and according to the invention: the treatment booth has a length of less than 12 m; the booth and the oven has a cumulative length of less than 12 m; the treatment booth and the oven have a cumulative width; less than 2.35 m, and preferably less than 2.33 m, the frame has a length less than 12 m and a width less than 2.35 m, and preferably less than 2.33 m. In this case, the transportable operational unit has a template allowing it to be transported in a standardized 40-foot container (container having an external length of 40 feet, or 12192 mm, and an outer width of 8 feet, or 2 438 mm). according to ISO 668 and ISO 1496).

Advantageously and according to the invention, the surface treatment and painting installation has one or more of the following characteristics: the oven has a width of less than 1.50 m, and preferably less than 1.10 m; ; the treatment cabin has a width of less than 1.50 m, and preferably less than 1.10 m; the painting booth has, in the axial direction, a dimension (called axial dimension) which is very much less-for example at least two or even three times smaller than the longitudinal dimension (length) of the elongate objects; the transportable operational unit has a height of less than 4 m and preferably less than 3.50 m. Thus, when the transportable operational unit is loaded on a conventional or possibly lowered trailer or semi-trailer 15, the overall height of the load does not exceed 4.50 m (the load thus easily passes under almost all the bridges of the truck. French and European road network); the treatment cabin and the oven are facing each other in the transverse direction of the chassis; The oven and the paint booth are arranged along a longitudinal edge of the frame; they are thus directly accessible to a user, which facilitates any subsequent maintenance operations; the power and control cabinet and the treatment solution tanks are arranged along the other longitudinal edge of the chassis, so as to be directly accessible to a user; the treatment cabin and the oven are adjacent in the transverse direction of the chassis; in other words, the treatment booth is arranged immediately adjacent to the furnace, between the furnace and the treatment solution tanks; The means for recycling the color powder comprise a separation cyclone and a dust collector device; the chassis provides a reception area of a color box; this color box receiving area may be provided in or on the frame; the zone of reception of a color box and the cyclone of separation are opposite the painting booth in the transverse direction of the chassis; the separation cyclone is arranged above the reception area of a color box; The dust collector device is arranged on the chassis in the extension of the furnace in the longitudinal direction of the chassis; the transportable operational unit also comprises a gas washing device, an evaporator and a control station equipped with a user interface, which control station is arranged along a longitudinal edge or a longitudinal end of the chassis so as to be accessible to a user; - The treatment booth can be fixed mounted on the chassis. As a variant, it is advantageously pivotally mounted on the chassis around a transverse axis (axis extending in the transverse direction of the car, and thus also in the transverse direction of the chassis), between a horizontal loading / unloading position. objects, and an inclined position of object processing. Preferably, the longitudinal direction of the cabin forms an angle of between 3 ° and 30 ° with the horizontal when the car is in an inclined position. The tilting of the booth during object processing 25 facilitates the dripping of objects. Advantageously and according to the invention, in the particular case of an installation for surface treatment and painting of elongated objects up to 7.50 m long: the treatment cabin has a length of between 7 , 70 m and 8.20 m, and a width of between 0.80 m and 1.10 m, the kiln has a length of between 7.70 m and 8.20 m, and a width of between 0.80 m m and 1.10 m, - the paint booth has a length of between 2 m and 3 m and a width of between 0.8 and 1.50 m, - the control and control cabinet has a length of between 2.50 m and 3.20 m, and a width between 0.40 m and 0.80 m. Advantageously and according to the invention, the frame comprises a trellis of beams and a floor covering said trellis.

Preferably, the surface treatment and painting installation according to the invention also comprises devices (optional) annexes to the transportable operational unit, among which a conveying structure delimiting an object handling zone in the longitudinal extension of the transportable operational unit, which conveying structure comprises: - conveying beams, extending in the longitudinal direction of the frame, each conveying beam supporting, at each of its axial ends, a suspension nacelle of at least one object, - guide rails of the conveying beams, extending in the transverse direction of the frame above the handling zone, each conveying beam being carried by at least two guide rails by means of rollers for transversely displacing said beam along said rails. In the manufacturing and implantation method according to the invention, said conveying structure is assembled in the reception area and is implanted in the longitudinal extension of the transportable operational unit. Advantageously and according to the invention, the conveying structure supports a ceiling covering the handling zone and a peripheral confinement facade of this zone, and the surface treatment and painting installation also comprises, as an auxiliary device to the transportable operational unit, a filtration unit adapted to filter the air in the handling zone and impose an overpressure in this zone. The filtration unit is implanted in the handling zone or in the immediate vicinity of the latter.

Advantageously and according to the invention, the installation also comprises, as a device annexed to the transportable operational unit, a laboratory for analyzing treatment solutions, which is implanted in the handling zone or in the vicinity of said handling area or transportable operational unit.

Thus, once the transportable operational unit placed on the floor of the premises of the installation, the only operations that may remain to be performed before the final delivery of the installation are the operations related to the assembly and / or the implementation of the ancillary devices to the transportable operational unit (these devices being optional). These operations are further reduced to a minimum. The conveyor structure being of simple design, its assembly can be done by two people in a very fast way. In addition, the filtration unit and the analysis laboratory can be entirely manufactured and checked at the factory; it is then sufficient to place them on the floor of the reception area and, if necessary, to connect them to the power supply and control cabinet and possibly (as far as the analysis laboratory is concerned) to the treatment circuit. the transportable operational unit. The invention also relates to a surface treatment and painting installation and a method of manufacturing and installing such an installation, characterized in combination by all or some of the characteristics mentioned above and below. Other objects, features and advantages of the invention will appear on reading the following description which refers to the appended figures representing preferred embodiments of the invention, given solely by way of non-limiting examples.

Figure 1 is a schematic perspective view of a transportable operational unit according to the invention. Figure 2 is a schematic perspective view of an installation according to the invention comprising a transportable operational unit and ancillary devices. The installation according to the invention illustrated in FIGS. 1 and 2 is an installation specifically adapted to the surface treatment and to the painting of metal profiles 8 of joineries, which profiles are less than 7.50 m long (their length is usually of the order of 7.20 m). This installation comprises a transportable operational unit 1 (illustrated in FIG. 1), comprising a generally rectangular support frame 2. The frame 2 comprises a trellis of beams and a floor covering said trellis. In the example shown, the frame is 12.50 m long and 2.55 m wide. The transportable operational unit 1 also comprises a surface treatment cabin 3 of parallelepipedal overall shape. In the illustrated example, the treatment cabin is 8 m long, 1 m wide and 2.80 m high (overall dimensions when the cab is in a horizontal position). It is adapted to be able to receive a whole batch of several profiles 8 20 superimposed. The cabin is arranged so that its longitudinal direction coincides substantially with the longitudinal direction of the frame. The longitudinal end 15 of the cabin is closed by a fixed wall. Its opposite longitudinal end is closed by a door 4 of loading / unloading profiles to be treated. Access to this door is clear to allow the passage of 25 profiles; in other words, no element is arranged on the frame opposite this door in the longitudinal direction of the frame, between said door 4 and the longitudinal end 33 of the frame. The treatment booth 3 is pivotally mounted about a transverse pivot axis carried by two tripods fixed to the frame. The cabin can thus be placed in a horizontal position for loading / unloading the profiles, or in an inclined position for processing the profiles. The treatment booth 3 is equipped with a spraying device comprising at least one spray boom mounted slidably within the booth in the longitudinal direction of the booth (and this, for almost the entire length of the booth). cabin). The spray boom comprises firstly a frame associated with guide means and motorized drive means for the longitudinal displacement of the ramp. The spraying ramp further comprises a lower transverse distribution duct and at least two spraying columns opening on said distribution duct, which distribution duct and spray columns are carried by the frame of the ramp. Each spraying column comprises a plurality of spray nozzles distributed over the height of the column and oriented towards the inside of the cabin. Preferably, the frame of the spray boom carries a protective casing which extends between the spray columns and the walls of the treatment booth so as to protect said walls from projections of treatment solution.

The transportable operational unit 1 also comprises a block 5 called product block, containing storage tanks for treatment solutions. This product block 5 is arranged on the frame next to the treatment booth 3, facing the latter in the transverse direction of the frame. The transportable operational unit further comprises a circuit, said processing circuit, between the treatment solution tanks and the spray system of the treatment cabin. This processing circuit comprises on the one hand a supply duct opening in the distribution duct of the spray boom of the cabin. It further comprises, for each treatment solution tank, a conduit, said vessel conduit, connecting said tank to the supply conduit on an upstream section thereof, said section of the tanks. The supply duct is equipped with a pump, called the feed pump, downstream of the section of the tanks, for circulating a treatment solution from its storage tank to the spray boom of the cabin. The treatment circuit also comprises a drain pipe, whose upstream end is formed by a drain hole in the bottom of the cabin (the lowest point of the latter when in an inclined position). The downstream end of the drain duct opens into the supply duct, downstream of the section of the tanks and upstream of the supply pump. The drain line is equipped with a lift pump to return a spray treatment solution into the cabin to its storage tank. As a variant, the feed pump is used for this purpose: in this case, the treatment circuit comprises a return duct whose upstream end opens into the supply duct downstream of the feed pump and whose downstream end opens into the supply duct between the drain duct and the section of the tanks. In both cases, the treatment solution tanks are advantageously arranged on the frame, next to the treatment cabin and not below it. Unlike prior known surface treatment installations, the transportable operational unit according to the invention therefore has a limited height, which on the one hand facilitates its transport in one piece by road, and on the other hand allows its implantation. in most existing industrial and craft buildings. In addition, the relative arrangement of the treatment solution tanks and the treatment cabin gives the installation a great modularity: it is easy to add or remove a treatment solution tank, for example, to adapt treatments to the latest technical developments or to diversify production (processing of objects in aluminum, steel, etc.). Note that the product block 5 is advantageously arranged along a longitudinal edge 30 of the frame, which allows a user to access it easily to change, add or remove a treatment solution tank, to perform Manually rebalance a process solution or perform any maintenance on the process solution tanks or on the process circuit. In a known manner, etching solutions, rinsing solutions and preparation solutions are used as treatment solutions. The etching and preparation solutions are obtained by diluting a pure product in water. The product block 5 advantageously contains drums for storing pure products, and in particular: a drum for storing a highly concentrated base (with a pH close to 14), connected to a tank of basic etching solution; a storage drum of a highly concentrated acid (with a pH of close to 2), connected to a tank of acid etching solution; a product drum, highly concentrated, chromium-free surface conversion, connected to a preparation solution tank.

Each treatment solution tank advantageously has a capacity of less than 300 liters, so that the total volume of etching and preparation solutions is less than 1500 liters (for an installation comprising up to five etching or preparation solutions ). Such an installation has the advantage of not being subject to authorization, although it contains solutions considered to be dangerous or toxic. A simple declaration makes it possible to legalize its exploitation. In the illustrated example, the relative arrangement of the drain duct and the supply duct of the treatment circuit makes it possible to send directly back into the booth the treatment solution sprayed and recovered via the drain duct (closed loop spray). It is therefore possible to use tanks of very low capacity, and especially of capacity less than 100 liters, which further reduces the size of the block produced. The illustrated product block 5 is 0.50 m wide and less than 3 m long. It contains sixteen 60 to 120 liter tanks, including a basic attack solution tank, an acid attack solution tank, a chrome-free surface conversion solution tank, twelve tanks of rinsing solutions (waters) and a tank of used solutions for the temporary storage of the used treatment solutions before their depollution, which used solutions tank is connected to the supply duct of the treatment circuit so as to allow to transfer a volume of treatment solution from one any of the treatment solution tanks up to the used solution tank. The product block 5 also advantageously comprises a distilled water reservoir, connected to the supply duct of the treatment circuit so as to make it possible to transfer a volume of distilled water from said reservoir to any one of the treatment solution tanks. .

The transportable operational unit 1 also comprises: a device 11 for washing gas, connected to the product block 5 via a suction duct 12. The gas washing device comprises means for generating a suction stream in the suction duct 12. Each treatment solution tank is connected to the spray duct 12 by a breather; the same is true of the used solution pond and the preheating tank. The gas washing device 11 is also connected to the treatment booth by another suction duct 13. The gas washing device 11 is also connected to the feed duct of the treatment circuit, in order to be able to draw water. water required for washing the gases in one of the rinsing solution tanks or in the distilled water reservoir of the product block 5. In the example illustrated, the gas washing device 11 is arranged on the chassis in the extension longitudinal of the product block 5, facing transversely of the treatment booth 3 and to remain accessible to a user. It is approximately 0.60 m long, 0.40 m wide and 1 m high; an evaporator 14, connected to the gas washing device 11, which makes it possible to separate the water from the solutions coming from the gas washing device. The non-aqueous products resulting from this separation constitute ultimate waste. The illustrated evaporator 14 is approximately 0.60 m wide (in the longitudinal direction of the chassis), 0.80 m long (depending on the transverse direction of the chassis) and 1.50 m high. It is arranged on the frame in the longitudinal extension of the treatment booth 3, on the side of the closed longitudinal end thereof. It is accessible from the longitudinal end 32 of the chassis. The transportable operational unit 1 further comprises a paint booth 6, adapted to be traversed, in an axial direction, by sections 8 to paint. The paint booth 6 comprises a box for confining each projected diffusion stream on the profiles, which containment box has two openings 27 and 28 opposite one another in the axial direction for the passage of the profiles. The paint booth 6 is arranged on the frame so that its axial direction coincides substantially with the longitudinal direction of the frame. The paint booth is equipped with a diffusion flux projection device, which comprises a duct supplying at least two spray guns (facing each other in the transverse direction of the cabin and thus of the chassis). slidably mounted in the vertical direction and facing inwardly of the containment box. The transportable operational unit 1 also comprises a zone 16 for receiving a color box 18. This zone is provided near the painting booth 6, facing the latter in the transverse direction of the chassis, and so as to be accessible to a user. In the illustrated example, the zone 16 for receiving a color box is delimited by a recess 22 formed in the longitudinal edge 30 of the frame. This recess can accommodate a rolling carriage 17 carrying a color box 18. The carriage 17 comprises: a frame provided with rollers; an operating handle for moving and directing the cart; a reception table of a color box; means (fixing clamps for example) for maintaining the color box on said table at a predetermined location; a vibration device for generating horizontal vibrations on the table (for sieving the recycled powder); a lifting device (hydraulic jack, pneumatic cylinder, etc.) making it possible to move said table between a high horizontal position, called the diffusion position, and a low horizontal position, called the color change position; means (pedal, lever ...) for actuating the lifting device. The use of such a rolling cart facilitates the establishment of a color box in the installation. Note however that a chassis devoid of recess and whose floor has a free area for receiving a color box is in accordance with the invention. Each color box comprises a housing, a lower portion of which forms a reservoir of colored powder, which housing comprises an upper opening, called the recycling opening, for recycling excess powder sprayed into the paint booth. The color box further comprises a sieve, arranged horizontally between said recycle aperture and the color powder reservoir. The color box also includes a sampling device, adapted to collect the color powder contained in the tank. This sampling device comprises for example at least: a powder fluidization arch supported on the bottom of the tank, which arch defines a sampling zone; a nozzle for injecting compressed air into the sampling zone; a powder suction mouth opening in the sampling zone; a sample line connecting said suction mouth to a powder outlet port in the color box housing.

The transportable operational unit 1 also comprises means, called diffusion means, comprising for example at least: a diffusion duct connected on the one hand to a powder outlet orifice of the color box and on the other hand to the duct supplying the spray guns of the spray booth; a source of compressed air capable of sending compressed air into the diffusion duct towards the painting booth, the diffusion duct forming a venturi opposite the powder outlet orifice so as to be able to suck the powder contained in the sample line of the color box. The transportable operational unit 1 also includes means for recycling excess color powder projected into the paint booth. These recycling means comprise: a separation cyclone 19, connected by a conduit 20, said recovery conduit, to a recovery opening in the containment box of the paint booth (which recovery opening opens on the outside of the cabin and communicates with the interior of the cabin). Cyclone 19 comprises a lower powder outlet mouth intended to cooperate with the recycling opening of a color box. The separation cyclone 19 is arranged substantially vertically, facing the paint booth 3 in the transverse direction of the frame, and above the receiving zone 16 of a color box 30, so that its lower mouth Powder outlet end 2922788 is coupled with the recycling opening of a color box placed on the carriage table 17 in the high diffusion position. To uncouple the color box and separation cyclone (in order to change color or replenish an empty box), simply lower the table of the carriage 17 to its low position of color change, then exit the carriage of the recess 22; a dust collector device 21 comprising ventilation means capable of causing the separating cyclone 19 and the paint booth 6 to depressurize on the one hand. For this purpose, the dust collector device 21 is in particular connected by a vacuum duct 23, to an upper outlet 10 of cyclone gas. The dust collector device makes it possible to filter the fine particles of color powder that are too small to be recycled. The dust collector device 21 is arranged on the frame in the longitudinal extension of the furnace 7 (described below), along a longitudinal end 32 of the frame so as to be accessible to a user. In the illustrated example, it measures approximately 1 m (its section is substantially square) and 3.5 m high. It should be noted that the means for diffusing and recycling the color powder are arranged in such a way as not to impede the entry and exit of the profiles in the treatment booth 3. In particular, the diffusion duct of the diffusion means and the recovery duct of the recycling means are housed either in the frame lattice or in a flat box fixed on the floor of the frame. The transportable operational unit 1 further comprises an oven 7 for firing the color powder applied to the profiles. In the example shown, the oven 7 is 8 m long, 1 m wide and 3.20 m high (overall dimensions). It is adapted to fully receive a batch of several superimposed sections. The oven is arranged so that its longitudinal direction coincides substantially with the longitudinal direction of the frame. The longitudinal end of the oven is closed by a fixed wall. Its opposite longitudinal end is closed by a door 26 for loading / unloading the profiles to be fired. The furnace 7 has heating means that can be electric (electrical resistances, infrared radiation, etc.) and / or gas, possibly associated with forced convection means. The oven 7 and the paint booth 6 are aligned in the longitudinal direction of the frame, so that the door 26 of the furnace is opposite the passage openings 27, 28 of the cabin. A batch of profiles passing through the cabin to be painted thus penetrates directly into the oven, for subsequent cooking. The oven 7 and the paint booth 6 are arranged along the longitudinal edge 31 of the frame so as to be accessible to a user for possible maintenance or manual cleaning of the paint booth. The transportable operational unit 1 also comprises a power supply and control cabinet 24, in which are centralized all the power supplies necessary for the operation of the various elements of the transportable operational unit, supplies intended to be connected to an external distribution network. conventional. The illustrated cabinet is 3 m long and 0.70 m wide, with a height of less than 2.5 m. It is arranged on the frame 2 along its longitudinal edge 30 (so as to be accessible to a user), between the product block 5 and the receiving zone 16 of a color box. The transportable operational unit 1 further comprises a control station 29 adapted to allow control of the entire installation, which station comprises a touch screen user interface. The control station 29 is housed between the color box receiving area 16 and the power and control cabinet 24, along the longitudinal edge 30 of the frame so as to be accessible to a user.

The transportable operational unit 1 is adapted to be carried by a crane for loading on a conventional low loader and unloading. To this end, the frame has reinforced areas for receiving the suspension hooks of the crane. Given its size, the transportable operational unit 1 illustrated can be transported by road without specific authorization. It is fully manufactured in the factory, and its operation is fully tested before its implementation in the room to accommodate it. The installation according to the invention illustrated in FIG. 2 also comprises devices that are attached to the transportable operational unit 1, namely a conveying structure 34, a filtration unit 35 and an analysis laboratory 36. conveying 34 defines on the one hand a handling zone 37 in the longitudinal extension of the transportable operational unit 1, facing the end 33 of the chassis, and on the other hand a storage area 38 next to the unit 1, that is to say facing the latter in the transverse direction of the frame. The conveying structure 34 comprises conveying beams 39, extending in the longitudinal direction of the frame, each conveying beam carrying, at each of its axial ends, a nacelle 40 of suspension of a plurality of superimposed sections (each nacelle comprises a plurality of superposed arms, each arm being able to support one end of a profile). Each profile is thus suspended in a horizontal position, by its two ends. The conveyor structure 34 further comprises rails 41 for guiding the conveyor beams, extending in the transverse direction of the chassis above the handling zone 37 and the storage area 38.

Each conveying beam 39 is at all times carried by at least two guide rails, by means of rollers for transversely displacing said beam along said rails. A user can thus manually move transversely a conveying beam carrying profiles, so as to bring said beam next to the entrance door 4 of the treatment booth 3 or facing the passage openings 27, 28 of the booth. paint 6. The treatment cabin 3 also incorporates guide rails which extend in the longitudinal direction of the car (and thus in the longitudinal direction of the chassis), inside said car (under a ceiling of this car). last), and along which can be moved longitudinally conveying beams. The conveying structure is designed so that the conveyor beams can pass, by simple longitudinal movement, the handling zone (where they are carried by the transverse guide rails 41 of the conveying structure) to the cabin of treatment 3 (where they are carried by the longitudinal guide rails of the cabin). On the other hand, the paint booth 6 has a height less than that of the conveying beams, making it possible to move (manually or automatically) a conveying beam above the booth in the longitudinal direction. The containment box of the paint booth is pierced with an upper opening 42 allowing the passage of the nacelles of the conveying beam. The installation further comprises a light ceiling 43 above the handling zone 37, as well as a peripheral façade 44 for confinement of said handling zone, which facade has access openings to the zone. The ceiling 43 and the peripheral façade 44 are carried by the conveying structure. Associated with filtration group 35, this ceiling and this facade make it possible to impose a slight overpressure in the handling zone. The filtration unit also comprises at least one filter capable of retaining dust and other particles larger than 5 m. In the example shown, the storage area 38 is used only for storing painted profiles and is therefore not filtered. However, it is advantageous to overpressurize and also filter this storage area 38 in order to be able to store profiles to be painted (it is appropriate in this case to confine it with a ceiling and a peripheral façade) . The installation finally includes an analysis laboratory 36 equipped with an automatic titration device. This titration device comprises, on the one hand, sampling means for taking solution samples from the treatment solution tanks, means that are connected to the transportable operational unit processing circuit, and on the other hand means of automatic analysis of the samples taken, in order to control the quality of each treatment solution. These analysis means are in particular suitable for measuring the pH of each sample of solution taken, its conductivity, the concentration of the solution in pure product available (if it is a solution of attack or preparation) , the concentration of the solution of aluminum or other particles and metal ions from the treated sections (if these are made of metal), the concentration of the solution in containers (that is to say pure product from another treatment solution, especially if the solution analyzed is a rinsing solution). Preferably, the analysis laboratory also comprises means for automatic rebalancing of each treatment solution, adapted to automatically control the disassembly of a treatment solution, which disassembly consists in removing from the corresponding storage tank a volume of solution of treatment (this volume is calculated by the analysis means depending on the quality of the solution), then the reassembly of said solution, which reassembly is to add in the storage tank on the one hand a volume of water generally equivalent to the volume of solution removed and secondly the necessary amount of pure product to obtain the desired final concentration (if it is a solution of attack or preparation). Alternatively, the automatic titration device and the automatic rebalancing means are integrated in the transportable operational unit; for example, they are located next to the power and control cabinet. In this case, the analysis laboratory comprises all the means useful for controlling the quality of the surface treatment and for the associated experiments, with the exception of said titration device and rebalancing means. It goes without saying that the invention can be subject to numerous variants with respect to the embodiments described and illustrated.

Claims (4)

1 / Apparatus for surface treatment and painting of elongate objects comprising: - a plurality of storage tanks for treatment solutions, - a treatment booth (3), equipped with a treatment solution spraying device , which treatment cabin is adapted to fully accommodate at least one elongated object to be painted, placed in the cabin so that its longitudinal direction coincides substantially with a longitudinal direction of the treatment cabin, a circuit, said processing circuit between said treatment solution tanks and the treatment cabin, firstly for the supply of treatment solution of the spray device of the treatment cabin, and secondly for the return of the treatment solution sprayed up to the corresponding tank, at least one box (18), called a color box, for storing a colored powder, a paint booth (6), equipped with a filtering device, e projection of at least one gaseous flow loaded with color powder, called diffusion flux, means, called diffusion means, for the generation of the diffusion flux (s) from color powder taken from the box of color, and for the diffusion flux feed of the projection device of the paint booth, means (19-21, 23) for recycling the excessively projected color powder in the paint booth, an oven (7) for baking the paint, adapted to fully accommodate at least one elongated object to be painted, placed in the oven such that its longitudinal direction coincides substantially with a longitudinal direction of the oven, characterized in that: the paint booth (6) is adapted to be traversed in an axial direction by at least one object to be painted presented so that its longitudinal direction coincides substantially with said axial direction, said booth belt having an opening (27, 28) at each of its axial ends for the passage of at least one object, - the treatment booth (3) has a length of less than 22 m, - the painting booth (6) and the furnace (7) have a cumulative length of less than 22 m, - the treatment booth (3) and the furnace (7) have a cumulative width of less than 4 m, - the installation comprises a carrier frame (2) forming a generally rectangular platform, on which are mounted the treatment solution tanks, the treatment cabin, the treatment circuit, the paint booth, the diffusion means, the color powder recycling means, the oven and a cabinet (24) supply and control, - the frame (2) has a length less than 22 m and a width of less than 4 m, the frame and the elements it carries forming a unit 20 said transportable operational unit (1), - the oven (7) and the cabin of e paint (6) are arranged on the frame in the extension of one another in the longitudinal direction of the frame and so that the longitudinal direction of the furnace and the axial direction of the paint box substantially coincide with the direction longitudinal of the frame, - the treatment cabin (3) is arranged on the frame parallel to the oven (7) and such that its longitudinal direction coincides substantially with that of the frame. 2 / Apparatus according to claim 1, characterized in that: - the treatment booth (3) has a length less than 17 m, - the paint booth (6) and the oven (7) have a cumulative length less than 17 m, - the treatment cabin (3) and the oven (7) have a cumulative width of less than 3 m, - the frame (2) has a length less than 17 m and a width less than 3 m. 3 / Apparatus according to claim 1, characterized in that: - the treatment booth (3) has a length less than 15.5 m, - the paint booth (6) and the oven (7) have a cumulative length lower at 15.5 m, - the treatment cabin (3) and the oven (7) have a cumulative width of less than 2.55 m, - the frame (2) has a length of less than 15.5 m and a smaller width at 2, 55 m. 4 / Apparatus according to claim 1, characterized in that: -the treatment booth (3) has a length less than 12 m, - the paint booth (6) and the oven (7) have a cumulative length less than 12 m, 25 - the treatment cabin (3) and the oven (7) have a cumulative width of less than 2.35 m, - the frame (2) has a length of less than 12 m and a width of less than 2.35 m M.5 / Installation according to one of claims 1 to 4, characterized in that the paint booth (6) has, in the axial direction, a dimension much smaller than the longitudinal dimension of the elongate objects. 6 / installation according to one of claims 1 to 5, characterized in that the transportable operational unit (1) has a height less than 4 m. 7 / Apparatus according to one of claims 1 to 6, characterized in that: - the treatment booth (3) and the oven (7) have respective widths less than 1.10 m, - the oven (7) and the paint booth (6) are arranged along a longitudinal edge (31) of the frame, - the supply and control cabinet (24) and the treatment solution tanks are arranged along the another longitudinal edge (30) of the frame. 8 / Apparatus according to one of claims 1 to 7, characterized in that: - the recycling means comprise a separation cyclone (19) and a dust collector device (21), - the frame provides a zone (16) for receiving of a color box (18), - the zone (16) for receiving a color box and the separation cyclone are opposite the paint booth in the transverse direction of the chassis. 9 / Apparatus according to claim 8, characterized in that the separation cyclone (19) is arranged above the zone (16) for receiving a color box. 10 / installation according to one of claims 8 or 9, characterized in that the dust collector device (21) is arranged on the frame in the extension of the furnace (7) in the longitudinal direction of the frame. 25 / Installation according to one of claims 1 to 10, characterized in that the transportable operating unit (1) also comprises a device (11) for washing gas, an evaporator (14) and a control station (29). ) equipped with a user interface, which control station is arranged along a longitudinal edge or a longitudinal end of the frame. 12 / installation according to one of claims 1 to 11, characterized in that the processing cabin (3) is pivotally mounted on the frame about a transverse axis, between a horizontal position of loading / unloading objects, and a inclined position of object processing. 13 / Apparatus according to one of claims 1 to 12, for the surface treatment and painting of elongated objects up to 7.50 m long, characterized in that: - the treatment cabin (3) has a length of between 7.70 m and 8.20 m, and a width of between 0.80 m and 1.10 m, - the furnace (7) has a length of between 7.70 m and 8.20 m , and a width of between 0.80 m and 1.10 m, the painting booth (6) has a length of between 2 m and 3 m, and a width of between 0.8 and 1.50 m, the control and control cabinet (24) has a length of between 2.50 m and 3.20 m, and a width of between 0.40 m and 0.80 m. 14 / installation according to one of claims 1 to 13, characterized in that the frame (2) comprises a trellis of beams and a floor 25 covering said trellis. 15 / installation according to one of claims 1 to 14, characterized in that it also comprises a conveying structure (34) defining an area (37) for handling objects in the longitudinal extension of the transportable operational unit, which conveying structure 30 comprises: - conveying beams (39), extending in the longitudinal direction of the frame, each conveying beam supporting, at each of its axial ends, a nacelle suspension of at least one object, - rails (41) for guiding the conveyor beams, extending in the transverse direction of the chassis above the handling zone, each conveying beam being carried by at least two guide rails by means of rollers for transversely displacing said beam along said rails. 16 / Apparatus according to claim 15, characterized in that it comprises a ceiling (43) covering the handling zone (37) and a peripheral facade (44) for confining this zone, as well as a filtration unit (35). ) adapted to filter the air in the handling zone and impose an overpressure in this zone. 17. The plant as claimed in claim 1, comprising a laboratory for analyzing treatment solutions. 18 / A method of manufacturing, and implantation in a reception area, a surface treatment and painting facility of elongated objects according to one of claims 1 to 17, characterized in that one manufactures in the factory 20 transportable operational unit (1), by mounting each element of the unit on the carrier frame (2), transporting said transportable unit in a single piece to the host room, implements said operational unit in the reception area by placing its chassis on the floor of the room. 19 / A method according to claim 18, characterized in that the factory, prior to transport of the transportable operational unit (1), the individual and collective operation of the elements of said transportable operational unit.