WO2008083786A1 - Procédé et dispositif pour le vernissage de surfaces de coupe - Google Patents

Procédé et dispositif pour le vernissage de surfaces de coupe Download PDF

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Publication number
WO2008083786A1
WO2008083786A1 PCT/EP2007/009774 EP2007009774W WO2008083786A1 WO 2008083786 A1 WO2008083786 A1 WO 2008083786A1 EP 2007009774 W EP2007009774 W EP 2007009774W WO 2008083786 A1 WO2008083786 A1 WO 2008083786A1
Authority
WO
WIPO (PCT)
Prior art keywords
edge
coating
punch
liquid
paint
Prior art date
Application number
PCT/EP2007/009774
Other languages
German (de)
English (en)
Inventor
Thomas Turner
Hermann Schauer
Karl-Heinz Stellnberger
Christian Ivancsits
Original Assignee
Vatron Gmbh
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
Priority claimed from DE200610061014 external-priority patent/DE102006061014B8/de
Application filed by Vatron Gmbh filed Critical Vatron Gmbh
Priority to AT07819761T priority Critical patent/ATE524242T1/de
Priority to EP07819761A priority patent/EP2091664B1/fr
Publication of WO2008083786A1 publication Critical patent/WO2008083786A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • 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
    • B05C1/006—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 the edges of essentially flat articles
    • 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
    • B05C1/06—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 by rubbing contact, e.g. by brushes, by pads
    • 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
    • B05C7/06—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work by devices moving in contact with the work

Definitions

  • the invention relates to a method and apparatus for painting cut surfaces.
  • edges are often sharp-edged, so that there is an accident risk during installation and operation.
  • the object is achieved with a device having the features of claim 1.
  • Advantageous developments are characterized in the subclaims.
  • a further object of the invention is to provide a method for coating cut edges, which is simple, quick and safe to carry out, provides good corrosion protection and cut protection at the edge and with which even complex geometries with undercuts can be coated.
  • Dipping methods have hitherto been known from the prior art (FIGS. 41 to 44) in which a component is immersed in a coating bath.
  • a workpiece edge is immersed in the paint bath and then lifted from the paint bath.
  • this leads to long process times, since in this case the immersion times must be taken into account.
  • the bath level is constantly kept constant and the bath surface does not change the viscosity and that no skin forms on the bath level.
  • the inventive method provides for applying a liquid to a well-defined area of a workpiece, in particular the cut edges, to use a stamp that is adapted to the particular shape of the workpiece or to the edge profile.
  • the stamp is initially in a container and is completely covered by the liquid to be applied.
  • it is lifted from the liquid container and left for a certain period of time, so that excess liquid can run off.
  • For application of a liquid film on the workpiece this is now brought into contact with the punch form-fitting or with a small distance and removed immediately or after a short residence time again.
  • This method is used e.g. for applying a corrosion protection varnish to the cut surfaces of coated steel strip workpieces. This is done in a further step, the curing of the paint.
  • the workpieces to be machined are stamped or otherwise severed sheet metal parts that may be flat, bent or deep-drawn.
  • the application of paint can be done on almost every possible cutting surface of a three-dimensional, deep-drawn molding.
  • the sheets can be galvanized, galvanized and / or with an organic coating be provided.
  • the workpiece can be coated with one or more stamps in one or more steps.
  • anti-corrosion lacquers lacquers with or without pigments, adhesives, liquid zinc or liquid materials which can be foamed in a further working step are used as liquids to be applied.
  • liquids are used which are cured by thermal energy input or by energy input in the form of UV radiation.
  • UV lacquers are preferably used.
  • the viscosity of the liquids used may need to be adjusted to the process by solvents or other additions.
  • thermoplastics are used instead of paints.
  • the paint container is provided with stirrers and / or devices for temperature control.
  • the liquid container which also houses the die, is designed such that it has an inlet and a drain, so that the corresponding liquid is pumped in the circulation and is in each case refreshed in a separate mixing tank and, in particular, with new ones Solvents provided and / or heated.
  • the coating of the cut surface can be further painted together with the workpiece, for example by powder coating.
  • a further advantage of the invention is that the coating of the cut surfaces of the workpiece encloses the cut surfaces and covers the very sharp cutting edge to the outside and leaves a smooth, rounded contour on the workpiece, which virtually eliminates the risk of injury.
  • the classic stamping was first tried, being used as stamp material foam or rubber, such as sponge rubber.
  • the stamp was immersed in a paint vessel, then the cut surface of a stamped part was stamped, but the result was not satisfactory because the paint distribution was uneven, have formed in the paint bubbles and a large wear on stamp material was present and the corrosion protection is not always sufficient was.
  • rubber or bare steel are used for stamping. By immersing the stamp in a paint container initially no uniform coating distribution on the stamp could be achieved, which is why the paint was applied with a compressed air dosing system on the stamp.
  • the paint cartridges used were degassed by centrifuges.
  • openings within a sheet metal component can also be provided with an edge protection lacquer, wherein the coating of the edges delimiting an opening can take place simultaneously with the coating of the outer edges or sequentially.
  • edge protection lacquer a coating of the edges delimiting an opening can take place simultaneously with the coating of the outer edges or sequentially.
  • mandrels are retracted in such openings, which are either conical and have a corresponding cross-section of the opening or which can enlarge and reduce its size and are optionally rotated to effect a uniform application of paint on the edges bounding an opening.
  • Figure 1 a partially sectioned side view of a first embodiment of the device according to the invention
  • FIG. 2 shows the device according to FIG. 1 in a perspective partially sectioned view
  • Figure 3 another embodiment of the invention
  • FIG. 4 shows the device according to FIG. 3 in a perspective partially sectioned view
  • Figure 5 the device according to Figures 1 and 2 with marked liquid level and the directions of movement of the moving parts;
  • Figure 6 the device of Figures 3 and 4 with the directions of movement of the moving parts and a drawn liquid level.
  • FIG. 7 shows a further embodiment of the device according to the invention for flat stamped parts with circumferential edges
  • Figures 8a - 8c the device of Figure 7 in a first standby state in which a stamped part can be placed;
  • Figures 9a - 9c the apparatus of Figure 7 in a second state in which a stamped part is placed and a first set of stamps in readiness;
  • FIGS. 10a-10c the device according to FIG. 7 during stamping of opposite sides of the stamped part
  • FIGS. 11a-11c the device according to FIG. 7 during the stamping of the further opposite sides of the stamped part, with the stamps in stand-by;
  • Figures 12a - 12c the device of Figure 7 in the stamping of the other sides of the stamped part, wherein the stamp are formed adjacent;
  • FIGS. 13a, 13b show the device according to FIG. 7 with stamps that have emerged and with a stamped part lifted off and moved away after stamping has taken place;
  • FIG. 14 a further embodiment of the device according to the invention in a perspective top view
  • Figure 15 is an exploded view of the device of Figure 14;
  • FIGS. 16a-16c are identical to FIGS. 16a-16c:
  • the device according to the invention when coating the edges of a three-dimensionally curved component with an inner recess during the painting of a peripheral edge facing the vessel;
  • FIGS. 17a-17c the device according to FIG. 14 of first opposing edge regions of a substantially oval opening
  • FIGS. 18a, 18b the device according to FIG. 14, wherein the coating punches rest against the first peripheral edge regions;
  • Figures 19a-19c the apparatus of Figure 14, wherein the punches are for painting the remaining cut edges of the opening in the stamping position;
  • Figures 20a-20c the apparatus of Figure 14, wherein the remaining cut edges of the opening are stamped;
  • FIG. 21 shows a further embodiment of the device according to the invention for painting the cut edges of a hole or a punch-like cut with an outer guide of a coating mandrel;
  • FIG. 22 shows a further embodiment of the device according to FIG. 21 with an internally guided coating mandrel
  • FIG. 23 shows another device for coating the cut edges of a hole, wherein the mandrel works according to the displacement principle
  • FIG. 24 shows a further embodiment of a device for coating the cut surfaces of holes, wherein the coating mandrel is rotatably mounted
  • FIG. 25 shows a further device for coating the cut edges of an opening or a hole in a component, the mandrel having a region with an enlargeable cross section for applying the lacquer;
  • FIG. 26 shows a further embodiment of a device according to the invention for painting the cut edges of a hole, wherein the mandrel is moved linearly into the corresponding height and then horizontally into the hole;
  • FIG. 27 shows a rotatable, anchor-like coating mandrel, wherein several components can be coated successively
  • Figures 28a-28d a coating mandrel with internal supply
  • FIGS. 29a-29d show different mandrel geometries in a side view
  • Figures 29e - 29h the mandrel geometries of Figures 28a to 28d in a plan view
  • Figures 29i - 291 the coating mandrels according to Figures 28a to 28d in a perspective view with matching hole geometries in components;
  • FIG. 30a shows a further device according to the invention for painting the cut surface of a hole or a recess in a component, in particular a component with a greater material thickness, wherein the mandrel has an enlargeable circumference via a segmentation;
  • FIGS. 30b, 30c show a first embodiment of a segmented mandrel in the rest position and in the painting position;
  • FIGS. 3Od, 3Oe another embodiment of a segmented mandrel, wherein the mandrel opens with a gap;
  • FIGS. 3Of, 30g a segmented mandrel for coating an elliptical recess
  • FIG. 31 shows a perspective, partially cutaway view of a further embodiment of a device for painting the cut surface of a recess or a hole in a component
  • FIGS. 31a-31f are identical to FIGS. 31a-31f:
  • Figures 32a-32e illustrate the operation of the apparatus of Figure 30 with a rotatable segmented mandrel for coating the cut edges of a hole or recess;
  • FIG. 33 shows the device according to FIGS. 1 and 2 in a further embodiment with a coating mandrel for coating the cut edges of an opening;
  • FIG. 35 is a schematic of the process sequence
  • FIG. 36 a schematic description of the method
  • FIG. 37 a process description of the pretreatment
  • Figure 38 a process tree of the paint circuit according to the invention.
  • Figure 39 the handling sequence in a complex workpiece having a plurality of openings
  • FIG. 40 shows the integration of the coating device according to the invention in a system with a deep-drawing device
  • Figures 41 to 44 a dipping method according to the prior art
  • Figures 45 and 46 schematically the disadvantages of a dipping method according to the prior art.
  • the device 1 has a paint container 2, which has, for example, a square base surface or an oblong rectangular base surface in accordance with the workpiece to be processed.
  • the paint container 2 thus has a bottom wall 3 and a circumferential side wall 4.
  • a coating stamp 5 is arranged in the paint container 2.
  • the coating die 5 has a substantially U-shaped bracket 6 which, via a bottom wall 7, extends from this upwardly extending ironing Walls 8 and 8 of the Bügelwandungen laterally outgoing support walls 9 has.
  • the support walls 9 extend beyond the walls 4 of the paint container to the outside and are arranged on a lifting mechanism 10, for example on a pneumatic or hydraulic piston 11 of the lifting mechanism 10. With the lifting device 10 and the pneumatic or hydraulic piston 11, on the support walls 9 act, thus the coating die 5 can be up and lifted within the paint container 2.
  • the coating die 5 additionally has a die wall 13 corresponding to the edge contour of a workpiece 12 to be coated, the die wall 13 being arranged on the bottom wall 7 and having an upwardly directed peripheral die edge 14.
  • the stamp edge 14 is both respect. their circumferential course as well as with respect to their height profile to the contour of a component 12 in the present images of a gas cap 12 adapted such that a gas cap 12, which is placed on the punch edge 14, rests with its peripheral edge on all sides the same.
  • the workpiece 12 is positioned with a gripper 15 above the coating die 5, wherein the gripper 15 is, for example, a suction gripper 15.
  • the stamp edge 14 may be flat, but the stamp edge 14 may also be formed as a groove with a u- or v-shaped groove, which collects in the groove, the liquid with which the edge of the workpiece to be coated.
  • the bottom wall 7 preferably has apertures 16, so that in the area enclosed in front of the stamp wall 13 region of the paint can flow.
  • one or more webs 17 are left to stand on which, for example, one or more centering mandrels 18 can be arranged, which engages in the following to be described laying the workpiece in a corresponding center hole 19 to center the workpiece.
  • both the workpiece 12 can be moved toward the stamp edge 14 and the stamp can be lifted out of the liquid by means of the lifting mechanism, in such a way that at least the stamp edge 14 projects beyond the liquid level 20.
  • the placement of the cutting edge to be coated on the upper coating edge of the stamp can be such that the edge rests on the stamp or a certain distance of the edge to be coated edge to the die edge, the edge but already immersed in the coating liquid and the coating liquid due to capillary forces on the Edge of the workpiece and the adjacent areas flows or spreads.
  • the workpiece and the punch edge 14 or the punch are again moved away from each other and then caused a drying or curing of the edge covering liquid, for example by a so-called UV drying in a corresponding facility (UV oven ).
  • a drying or curing of the edge covering liquid for example by a so-called UV drying in a corresponding facility (UV oven ).
  • the outwardly or inwardly facing edges of a workpiece are coated.
  • a device 30 also has a paint container 31 with a bottom wall 32 and a peripheral container wall 33.
  • the paint container preferably has a continuous bottom surface, wherein in the paint container, a coating device 34 is present.
  • the coating device 34 consists, for example, of a base frame 35 and a hingedly hinged stamping device 36 arranged thereon.
  • the stamping devices 36 are pivotable upwardly about an axis 37 and have a coating edge 38 extending substantially vertically in the coating state.
  • the coating edge 38 may also be flat or formed with a groove.
  • two mutually parallel edges 39 of a workpiece 40 are coated, wherein the workpiece 40 is moved with a gripper 41 in the region of the punch edge 38 and the punch edges 38, according to Figure 6 are moved out of the liquid level 42 out.
  • the workpiece is first placed in this device and then the coating movement 43 is performed.
  • inner edges of a workpiece 40 can be coated in a comparable manner by corresponding pivoting punch devices 36 are folded into it.
  • two opposite edges can first be coated and then the other, opposite edges can be coated.
  • one partial circle or one partial oval can first be coated and, with a further pivoting movement, the other partial oval or the other partial circle.
  • the devices 1 and 30 can also be used together in a device in which both down and side edges are coated.
  • a paint container is present which, in its interior, approximately centrally comprises a receiving column 52 which has upwardly directed receiving mandrels 53.
  • the receiving mandrels 53 are formed so that they can engage in corresponding receiving holes 54 of a workpiece 55 in order to hold the workpiece immovably in the x and y direction and lead.
  • the coating device 50 has two pairs of workpieces 55 and Lackierstkovn 56th
  • This coating device 50 is designed, for example, to paint an elongated oval workpiece 55, which is formed flat flat, at the edges.
  • the workpiece 55 is first moved over the coating device 50 (FIGS. 8a to 8c), with the punches 56a and the punches 56b resting in the lacquer bath.
  • the punches 56a, 56b are guided via lifting devices 57, which engage from outside on the punches 56a, 56b.
  • a first pair of opposing punches 56a are first moved out of the paint container 51 by the lifting devices 57 and positioned at the level of the circumferential edge 58 of the workpiece 55 (FIGS. 9a to 9c).
  • a workpiece 60 is coated on the edges, which has a circumferential edge 63 pointing in the direction of the paint bath, for example by punching and deep drawing, and a central opening 61 which extends from an edge 62 is limited.
  • the corresponding coating device 50 in turn has a paint container 51, wherein in the paint bath a first, the course of the edge 63 corresponding liftable punch 66 has and in turn stamp 56a and 56b stamp.
  • the punches 56a and punches 56b can in turn be raised and lowered by means of suitable lifting devices 57 from outside the lacquer bath and can also be moved horizontally outward and inward in this coating device 50.
  • the guides are arranged in the paint bath, that in the paint bath a hollow, in this case slot-shaped, column 65 is present, which comprises an opening 64, which makes it possible to control the guides from below the paint container 51.
  • the workpiece 60 is first deposited on the stamp 66, which is moved up from the paint bath and applied paint on the peripheral edge 63 ( Figures 16a to 16c). Due to an overlap of the stamp 56a and 56b, the punches 56a, 56b must first be moved inwards before they can be conveyed up to the workpiece 60 (FIGS. 17a to 17c). When the punches 56a, 56b are at the correct height, they are brought into contact with the peripheral edge 62 ( Figures 18a, 18b) and then lowered again.
  • the other two punches 56b are moved inward and brought to the correct height ( Figures 19a to 19c) and then ( Figures 20a to 20c) brought into contact with the inner edge 62, so that the inner circumferential edge 62 and the outer circumferential Edge 63 are completely coated.
  • the component is moved, for example, to a UV dryer or UV oven.
  • At least one coating mandrel 72 is provided for coating a circumferential edge of a hole 71 in a corresponding workpiece 70.
  • a hole or a circumferential edge of a hole 71 is shown in FIGS. 21 to 27.
  • the methods described above for coating larger openings or circumferential edges of the workpiece can be carried out at the same time or before or after.
  • a coating mandrel 72 is arranged on a coating mandrel bridge 73, wherein the coating mandrel bridge 73 is attached to a lifting device 57 as known from the preceding examples and is written, arranged.
  • a workpiece 70 is placed in a positionally accurate manner above the coating mandrel 72 and then the coating mandrel 72 is raised.
  • the mandrel has a conically encircling coating surface 74, which is extended from the paint bath 75 and enters the hole 71.
  • the conical surface 74 of the coating mandrel 72 is smaller at its thinnest point in diameter than the hole 71 and in its thickest portion larger than the hole 71.
  • the conical surface is in the hole 71 completely retracted state at the hole 71 delimiting edge on, whereby paint, in particular paint, which flows off the coating surface 74, wets the corresponding edge.
  • the coating mandrel 72 is driven down again with the coating mandrel bridge 73 into the paint bath, the workpiece 70 is moved and further processed.
  • a lifting mechanism 76 is present instead of a lifting device 57.
  • the lifting mechanism 76 consists for example of a lifting cylinder 77 and a reciprocating rod 78, wherein the Hubkolbenstange 78 passes through the bottom of the paint container and acts directly on the coating mandrel 72.
  • the coating mandrel 72 is formed with a radial groove 79 in the region in which it is located within the hole 71.
  • the coating mandrel 72 is designed with respect to the radial groove 79 so that it narrows, for example, by a head portion 80, which is retractable into the coating mandrel 70, the groove 79.
  • the operation of this mandrel is in this case such that accumulates in the groove 79 in the idle state in the paint bath of the paint.
  • the groove 79 is narrowed, so that the paint is pushed out of the groove 79 and to the circumferential edge of the hole 71 passes. As a result, the edge of the hole 71 can be coated without contact.
  • the coating mandrel 72 is formed with a cushion 81, for example made of a rubber-like plastic or foam, which can be bulged outward over the circumference of the coating mandrel 72 (here FIG. 24).
  • the pad 81 is arranged radially circumferentially in a groove 79 and is bulged by reducing the groove width of the groove 79, for example, by the interaction of a head portion 80 with the coating mandrel 72 to the outside.
  • the protrusion can also be done by a pneumatic inflation or hydraulic filling of the pad 81.
  • the cushion 81 may also be formed as a tube 81 which rests in a groove 79.
  • the mandrels are not moved with a lifting device 57 from the paint container 51, but are pivotally mounted on the paint container 51 via a pivot arm 85.
  • the coating mandrels 72 can be pivoted, for example, in such a way that they engage in a hole with a vertical hole plane (FIG. 25 on the left) or in a hole with a horizontal hole plane.
  • the coating mandrels 72 are arranged on a lifting device 86 which is provided separately for each mandrel and lift the coating mandrels 72 out of the paint bath or paint container 51 in the vertical direction (arrow 86a).
  • the mandrels In order to introduce the coating mandrels 72 into a hole with a vertical hole plane, the mandrels also have a device that allows a horizontal displacement (arrow 86b). The horizontal one Displacement is accomplished, for example, via a pneumatic or hydraulic piston-cylinder arrangement or a stepping motor or the like.
  • the mandrel is arranged rotatably outside a lacquer container 51, wherein the mandrel is designed as anchor mandrel 89, the armature mandrel 89 having two identical armature leg mandrels 87 arranged on an armature shaft 88, the armature shaft 88 is rotatably mounted at its end outside of the paint container 51.
  • the armature pin By pivoting the armature pin in the pivot point, the armature leg 87 can emerge alternately from the coating bath and be introduced into a correspondingly extending with a horizontal hole plane hole, which allows relatively high clock rates.
  • FIGS. 28a-28d there is a mandrel 100 which, in addition to other mandrels or other coating elements, may also be present alone, wherein this mandrel 100 does not have to be immersed in a varnish bath.
  • This is particularly advantageous when several openings are arranged very close to each other, so that in such more complex forms, the coating of the holes can be done both from below from a paint container and from above.
  • this mandrel is formed with a ring groove 101.
  • the circumferential annular joint 101 has feeds 102, which lead paint from a central axial bore 103 in the mandrel 100 into the annular joint 101.
  • lacquer is first pressed through the central axial feed bore 103 in the punch 100 into the feed bores 102 and from these into the peripheral annular joint 101 (FIG. 28b).
  • an outwardly projecting paint bead 104 forms on the annular joint.
  • the Lackwulst 104 is stripped by the immersion of the mandrel 100 in an opening at the opening edges 105, preferably with tracking of paint, the mandrel and thus the annular joint is moved through the opening ( Figures 28c, 28d) to pull out the mandrel 100 from the opening also at the bottom of the opening edge 105 during the upward movement strip paint and thus completely coat the edge circumferentially.
  • the mandrels can take on a variety of forms, which of course depends on the geometry of each hole. Four different geometries are shown in Figures 24a to 291, wherein the coating mandrels 72 are each formed with an inclined application surface 74 ( Figures 30a to 301).
  • the mandrels may be formed in cross-section or the application surfaces 74 in cross-section substantially round, oval, square or rectangular pyramidal or triangular pyramidal.
  • a coating mandrel 72 is likewise arranged on a coating mandrel bridge 73 with a lifting device 57, wherein other lifting devices are also possible here.
  • radially extendable segments 90 are provided in the coating mandrel 72.
  • the coating mandrel 72 is brought into the correct height position with retracted segments 90. Then, the segments 90 are extended and the inner edge of the opening 71 is coated.
  • the contact pressure of the segments 90 is advantageously chosen so that not too much paint is displaced.
  • only one spring-ring or a spring-ring segment 90 is present, which is pressed against the peripheral edge of the opening 71 by bending. Again, the distance to the edge is as small as possible.
  • a segmented, rotatable mandrel 91 is provided on the device 50 on a lifting device 93.
  • the segmented, rotatable mandrel 91 consists for example of two mandrel halves 92, which are each formed as a stamp.
  • the mandrel halves 92 and die halves 92 are immersed in a paint bath, wherein the paint bath or paint container 51 has a central opening with walls, so that the paint container 51 is formed as a circumferential round groove and the mandrel halves 92 and die halves 92 the paint container 51 in the middle.
  • the punch halves 92 and thorn halves 92 are in this case on a lifting device 93 vertically displaceable and designed to be rotatable about the vertical axis and horizontally displaceable.
  • the mandrel or the mandrel halves 92 is driven out of the annular paint container 51 in the appropriate height position.
  • the punch segments 92 are extended outward in accordance with the direction of the arrow 94 until they rest against the edge delimiting the opening 71 (FIGS. 32a, 32b) and then retracted in accordance with the arrows 95.
  • the mandrel or the mandrel halves are rotated according to the arrow 96 and immersed before or after in the paint container to apply paint again on the application surfaces. Subsequently, according to FIGS.
  • the punch segments 92 are extended to the hitherto uncoated regions of the peripheral edge of the opening 71 in accordance with the direction of the arrow 94 and then retracted in accordance with the arrow directions 95.
  • a slightly less complex construction is achieved than with a segmented mandrel.
  • Both the above-described dies and mandrels, segment mandrels or rotatable mandrels described above may have edge surfaces 97 that are smooth.
  • these application surfaces 97 can be contoured in accordance with the application.
  • Various groove shapes of the application surfaces 97 are shown in FIGS. 31a to 31d, wherein the groove is chosen such that it is slightly wider than the workpiece thickness. In the grooves accumulates due to adhesion but also through the groove-shaped undercut lacquer, during coating, the cut surface to be coated dips into the groove, whereby a particularly good Kantenumgriff is achieved.
  • V-shaped groove in a circumferential, in cross-section V-shaped groove ( Figure 31b) can be an automatic centering of the segment, stamp or mandrel on the workpiece.
  • Figure 31c the unbalanced cross-sectional image, which arises when punching thick sheets, can be compensated.
  • an easy-to-manufacture groove according to FIG. 31d can be used.
  • the surface of the punch or the segment with a contour, a structuring or with a corrugation or grooving that is sharp (Figure 3Ie) or gentler (Figure 3If) is formed to be uniform to the paint distribution ,
  • FIG. 33 in contrast to FIGS. 1 and 2, a comparable device is shown in which, in addition to the stamp edge 14 for coating the circumferential edge of the workpiece, a mandrel 108 is present to provide a hole 109 with a vertical hole plane with a varnish application. so that both a circumferential edge coating and a hole coating can take place with such a device.
  • the mandrel 108 can be arranged displaceably in the horizontal direction for this purpose.
  • the stamp is designed such that the stamp edge is supplied with lacquer from the stamp interior.
  • Such an embodiment can be used alone or in conjunction with punches that emerge from a varnish bath.
  • Such a punch (FIGS. 34a-34d) is designed as a substantially hollow punch 110 which has a cavity 111 which is surrounded by walls 112 and is supplied with paint via a feed line 113.
  • the coating die has a stamping surface 116 towards a workpiece edge 114 of a workpiece 115 to be stamped.
  • the stamping surface 116 is pierced by bores or slots 117, through which paint can be pressed from the cavity 111 to the surface 116.
  • the surface 116 is bounded on both sides of an edge 114 to be stamped by short wall sections 118, so that a coating groove 119 is formed.
  • the paint which is pressed by the paint channels 117 into the groove 119, is pressed to a Badspiegel- or paint level height 119 a, so that a certain paint reservoir is present in the groove.
  • means for controlling the inflow 121 may be present in the channels 117, for example valves.
  • the stamp can be from the shown, a straight line vaulted edge to coat and of course also three-dimensional d. H. also z. B. coat box-shaped edge courses, as shown for example in Figures 1 and 2.
  • Figures 34a, 34b When viewing by means of a stamp with paint reservoir 111 or a paint cavity 111 and channels 117 of the punch direction of the coating workpiece edge 114 is moved ( Figures 34a, 34b), the paint before or thereby through the paint channels 117 to the paint level boundary 120 into the groove 119 is filled.
  • the stamp is completely placed on the workpiece edge 114 or slightly spaced from it, so that the paint can spread to the workpiece edge 114.
  • the punch 110 is raised again ( Figure 34d), wherein a lacquer layer 122 remains on the edge.
  • the viscosity of the paint is an important process parameter. It depends on the behavior of the paint on the stamp and the behavior during transfer to the workpiece. Thus, there is a lower and upper limit for the viscosity, with too low a viscosity of the paint after coating withdraws again from the sharp cutting degree and too high viscosity of the paint does not flow around the cut surface around. In both cases, a corrosion resistance but also an effective protection of the edge or a user from cuts is not given.
  • the stamp must be adapted to the selected viscosity, in particular by the shape of a possibly existing groove. In the process, the limit values for these parameters must be adhered to accordingly.
  • the embodiment of the stamp depends greatly on the viscosity of the paint. After the stamp has been lifted out of the paint bath, stamping must be carried out until excess paint has expired from the transfer surface 97 and a resting coating layer has formed on the corresponding transfer surface or in a corresponding groove or on a corresponding web. The resulting waiting time can be greatly reduced if the chipping of the paint is not hindered.
  • z. B. the stamp web are made very high and the lower part of the stamp be provided with a large opening.
  • the opti- Malfall is a stamp that consists only of a bridge. The width of the web determines the thickness of the lacquer layer on the workpiece.
  • a compromise between the corrosion resistance and a very thin coating must be considered. Basically, the viscosity is low or vice versa for a wide punch or a wide application area.
  • liquefaction can also be produced by the movement of the stamp, in particular at fast cycle rates, and reinforced by agitators. It should be noted that the reduction in viscosity only lasts as long as the paint is stirred. With little effort, the viscosity of the paint can be varied over the temperature in many areas, which makes a device for controlling the temperature of the paint an important component.
  • the basic sequence of the coating results from FIG. 35.
  • the parts to be coated are removed from a charging system, provided that the workpieces have been preprocessed and stacked. Here, the items must be separated. If the coating system is mounted directly on an existing system or integrated into an existing system, the workpieces are already available individually. Existing plants can z. B. stamping, thermoforming or facilities for pre-assembly of the workpiece.
  • a pretreatment is carried out, in which case in particular the cut surfaces must be pretreated for coating. This refers in particular to the elimination of small amounts of oil, the elimination of paint crumbs at or- ganisch coated sheets, for example by brushing or blowing off with compressed air and optionally the roughening of the cut surface.
  • a chemical bond between the UV coating and an organic precoating of the sheet can be achieved by a chemical treatment of the cut surfaces or cut edges, which usually does not take place.
  • the coating takes place according to the possibilities already described, followed by curing.
  • the curing preferably takes place via UV radiation or thermally in known aggregates, it being possible to work with intermediate curing in the case of a coating which takes place in several steps.
  • a so-called paint circuit (FIG. 38) is used, in which fresh paint from a paint reservoir 120 is fed via an adjusting valve 121 and a pump 122 and optionally a filter 123 to an inner paint circuit.
  • the viscosity may be adjusted via the addition of solvents or thixotropic agents, with a temperature control device 125 which regulates the temperature of the paint.
  • the working container 126 is supplied with paint and the level of the paint level 129 and the bathroom mirror 129 is regulated and kept as constant as possible.
  • the paint container may also be provided with a stirring device 128.
  • the discharged paint is pumped through a filter and can also be a degassing 127 are supplied.
  • FIGS. 39, 40 The entire handling sequence during the coating process is described in FIGS. 39, 40, wherein, for example, a component to be coated with a complex geometry is provided with holes, protrusions, etc.
  • the component has a circumferential cut surface, cut surfaces on the end face of a flange and holes.
  • the workpiece 70 is singulated, held with a gripper, coated at a first coating station 130 with a punch along one side edge, then rotated and coated at a second coating station 131 at the opposite edge. Subsequently, the component is picked up and tilted again, after which, at a further coating station 132, both the holes and a bent-out collar or flange are coated. This is followed by UV curing in the case of light at a curing station 133 and then stacking at a station 134.
  • the device according to the invention and the method according to the invention can also be integrated into a conventional stamping or deep-drawing system, as shown in FIG. 40, wherein the components are punched or deep-drawn in a first section 135 from flat blanks. The corresponding components are then hardened coated and deposited in a process sequence 136 at the edges.
  • the exemplary embodiment is a complex component with a three-dimensional edge and a hole opening in a tab with a vertical orientation.
  • the component is moved by a magnetic gripper, the pneumatic cylinder of the Lifting device are synchronized via throttle valves.
  • the paint container is located in a temperature-controlled water bath, the stamp is made of hard chrome-plated steel and inside has a large recess, so as not to hinder the drainage of the paint.
  • the ridge has a width of three millimeters, with the mandrel for coating the inner surface of the hole being mounted on the ram.
  • the UV varnish used is a formulation specially optimized for corrosion resistance, the varnish being thixotropic, translucent and hard, viscoplastic in the cured state.
  • the density is 1.2 g / ml in the liquid and 1.3 g / ml in the cured state.
  • the paint is solvent-free and the volume shrinkage stems from the crosslinking of the paint during curing.
  • the viscosity of the paint is 6,000 mPa * s at room temperature and must be reduced for the coating process. Due to the thixotropic nature of the paint, the viscosity drops noticeably when the amount of paint is stirred. In this case, the thixotropic property already sinks by the entry and exit of the stamp.
  • a further reduction of the viscosity is achieved by heating the paint, wherein the paint bath is heated to 35 to 40 0 C and held there, whereby in the current process, together with the stamp movement, a viscosity of 3,200 to 4,200 mPa * s.
  • FIG. 35 shows the course of the coating with the time duration for each step.
  • the component is located at the beginning next to the paint container. It is picked up by the gripper and placed above the punch. At the same time, the stamp is lifted out of the paint bath. In order to let excess paint run off, a sufficient waiting time is maintained and then the cut edge is pressed onto the face of the stamp and held. During this time, the paint spreads evenly over the cut surface. After this residence time, the component is moved 20 mm vertically over the punch to bring small paint threads to tear. The circumferential cut surface is now completely covered with a layer of varnish.
  • the component is moved backwards, so that the tab of the component is located in front of the mandrel. Subsequently, the component is moved down until the bore is coaxially oriented with the mandrel (aligned) and the mandrel can penetrate into the bore. The component is moved horizontally backwards until the conical surface of the mandrel and the inside of the bore touch. Due to the small size no waiting time is required here and the component is removed after touching horizontally from the mandrel. The hole is now completely coated. It can happen that a paint pellet spans over the circular area of the bore after coating.
  • the component can be moved to the mandrel again, until the skin and the tip of the brush touch, resulting in the desired effect.
  • the component is then brought to cure, at the same time for further transport of the component, the stamp is recessed in the paint bath and held there.
  • the duration for a complete cycle is z. B. 10 seconds, after coating on the cut surface, a lacquer layer with 0.47 g / m 2 based on the length of the cut surface is formed.
  • the thinnest layer thickness is about 100 microns, with the curing in the UV oven is in about one second.
  • the viscosity is adjusted such that for the duration of the ap- plication, in particular in a device 30 sufficient liquid for coating the edge is available.
  • stamped or cut sheet metal components can be formed easily, quickly and safely with an edge coating, wherein the inventive devices allow a fully automated fast operation with high cycle times.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un dispositif (1) pour appliquer un liquide sur des arêtes de coupe de pièces en tôle (12). Au moins un dispositif de matriçage (14) possède une surface de matriçage qui correspond aux contours d'une arête de pièce à humecter. Le dispositif est réalisé de manière à ce que l'arête de matriçage ou les arêtes de matriçage et la pièce sont disposées mobiles les unes par rapport aux autres de manière à ce que les arêtes de matriçage puissent être amenées, en étant humectées par le liquide, jusqu'à une arête de pièce d'œuvre. L'invention concerne également un procédé de revêtement d'arêtes de coupe.
PCT/EP2007/009774 2006-12-22 2007-11-12 Procédé et dispositif pour le vernissage de surfaces de coupe WO2008083786A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT07819761T ATE524242T1 (de) 2006-12-22 2007-11-12 Verfahren und vorrichtung zum lackieren von schnittflächen
EP07819761A EP2091664B1 (fr) 2006-12-22 2007-11-12 Procédé et dispositif pour le vernissage de surfaces de coupe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610061014 DE102006061014B8 (de) 2006-12-22 2006-12-22 Vorrichtung zum Aufbringen eines Korrosions- und Schnittschutzes auf Schnittkanten von Blechbauteilen
DE102006061014.8 2006-12-22

Publications (1)

Publication Number Publication Date
WO2008083786A1 true WO2008083786A1 (fr) 2008-07-17

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PCT/EP2007/009774 WO2008083786A1 (fr) 2006-12-22 2007-11-12 Procédé et dispositif pour le vernissage de surfaces de coupe

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EP (1) EP2091664B1 (fr)
AT (1) ATE524242T1 (fr)
WO (1) WO2008083786A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103246090A (zh) * 2012-02-06 2013-08-14 三星电子株式会社 显示装置和制造方法

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DE1132704B (de) * 1960-07-15 1962-07-05 Huebel & Platzer Vorrichtung zum Angeben von Leim an stirnseitig bearbeitete, profilierte, z. B. gezinkte Werkstuecke aus Holz od. dgl.
GB1504022A (en) * 1974-05-21 1978-03-15 Toyo Seikan Kaisha Ltd Method and apparatus for applying a sealant to a can end
US4135476A (en) * 1977-11-01 1979-01-23 The Boeing Company Sealant applicator
US4302271A (en) * 1979-11-23 1981-11-24 The Boeing Company Countersink nozzle for sealant application
FR2617743A1 (fr) * 1987-07-10 1989-01-13 Aerospatiale Injecteur pour injecter un produit d'etancheite dans un espace debouchant au sein d'un alesage et un dispositif le comportant
EP0404169A2 (fr) * 1989-06-23 1990-12-27 Herberts Gesellschaft mit beschränkter Haftung Dispositif et procédé de revêtement des bords de découpe de plaques
US5582676A (en) * 1993-10-27 1996-12-10 Meinan Machinery Works, Inc. Apparatus for applying adhesive onto scarf-cut face of veneer
US5891521A (en) * 1995-09-07 1999-04-06 Nippon Steel Corporation Method of painting cut edge of precoated steel sheet and painting apparatus for same
DE19848964A1 (de) * 1998-10-23 2000-04-27 Lico Stahl Und Kunststofftechn Vorrichtung zum Aufbringen von Beschichtungsmaterial mittels eines Stempelprofils
EP1222969A1 (fr) * 2001-01-10 2002-07-17 Bruno Sawatzki Procédé et dispositif pour le revêtement de disques
DE10113022A1 (de) * 2001-03-17 2002-09-19 Volkswagen Ag Vorrichtung zum Lackieren einer Fläche eines Bauteils
EP1379114A1 (fr) * 2002-07-02 2004-01-07 Valeo Schalter und Sensoren GmbH Méthode pour disposer un joint sur le contour d'un boítier et dispositif afférent
FR2877861A1 (fr) * 2004-11-12 2006-05-19 Espace Production Internationa Procede d'habillage de chanfrein de panneaux de revetements de sols

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1132704B (de) * 1960-07-15 1962-07-05 Huebel & Platzer Vorrichtung zum Angeben von Leim an stirnseitig bearbeitete, profilierte, z. B. gezinkte Werkstuecke aus Holz od. dgl.
GB1504022A (en) * 1974-05-21 1978-03-15 Toyo Seikan Kaisha Ltd Method and apparatus for applying a sealant to a can end
US4135476A (en) * 1977-11-01 1979-01-23 The Boeing Company Sealant applicator
US4302271A (en) * 1979-11-23 1981-11-24 The Boeing Company Countersink nozzle for sealant application
FR2617743A1 (fr) * 1987-07-10 1989-01-13 Aerospatiale Injecteur pour injecter un produit d'etancheite dans un espace debouchant au sein d'un alesage et un dispositif le comportant
EP0404169A2 (fr) * 1989-06-23 1990-12-27 Herberts Gesellschaft mit beschränkter Haftung Dispositif et procédé de revêtement des bords de découpe de plaques
US5582676A (en) * 1993-10-27 1996-12-10 Meinan Machinery Works, Inc. Apparatus for applying adhesive onto scarf-cut face of veneer
US5891521A (en) * 1995-09-07 1999-04-06 Nippon Steel Corporation Method of painting cut edge of precoated steel sheet and painting apparatus for same
DE19848964A1 (de) * 1998-10-23 2000-04-27 Lico Stahl Und Kunststofftechn Vorrichtung zum Aufbringen von Beschichtungsmaterial mittels eines Stempelprofils
EP1222969A1 (fr) * 2001-01-10 2002-07-17 Bruno Sawatzki Procédé et dispositif pour le revêtement de disques
DE10113022A1 (de) * 2001-03-17 2002-09-19 Volkswagen Ag Vorrichtung zum Lackieren einer Fläche eines Bauteils
EP1379114A1 (fr) * 2002-07-02 2004-01-07 Valeo Schalter und Sensoren GmbH Méthode pour disposer un joint sur le contour d'un boítier et dispositif afférent
FR2877861A1 (fr) * 2004-11-12 2006-05-19 Espace Production Internationa Procede d'habillage de chanfrein de panneaux de revetements de sols

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103246090A (zh) * 2012-02-06 2013-08-14 三星电子株式会社 显示装置和制造方法
EP2624543A3 (fr) * 2012-02-06 2014-02-19 Samsung Electronics Co., Ltd. Dispositif dýaffichage et procédé de fabrication

Also Published As

Publication number Publication date
EP2091664A1 (fr) 2009-08-26
EP2091664B1 (fr) 2011-09-14
ATE524242T1 (de) 2011-09-15

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