Method and device for applying a sealing agent onto an edge of a workpiece, in particular a board-shaped workpiece

Abstract

The invention relates to a method for applying a sealing agent onto an edge (11.1, 12.1, 13.1, 21, 22, 23, 24) of a workpiece (2, 11, 12, 13), in particular a board-shaped workpiece, made of a wood material using a device which has a conveying unit (101) for moving the workpiece (2, 11, 12, 13) relative to a sponge element (110), said sealing agent being applied by means of the sponge element (110), which is impregnated with the sealing agent, wherein the sponge element (110) is impregnated by supplying the sealing agent onto a first surface of the sponge element (110), said first surface differing from a second surface of the sponge element (110) which is brought into contact with the workpiece edge (11.1, 12.1, 13.1, 21, 22, 23, 24) in order to apply the sealing agent onto the workpiece edge (11.1, 12.1, 13.1, 21, 22, 23, 24). The invention further relates to a device for applying a sealing agent onto an edge (11.1, 12.1, 13.1, 21, 22, 23, 24) of a workpiece (2, 11, 12, 13), in particular a board-shaped workpiece, made of a wood material.

Description

[0001] Method and device for applying a sealing agent to a workpiece edge of a workpiece, in particular a plate-shaped workpiece

[0002] The present invention relates to a method and a device for applying a sealing agent to the edge of a workpiece, in particular a panel-shaped workpiece. Furthermore, the invention relates to a door leaf. Another subject of the invention is a door frame element.

[0003] The documents US 5 891 521 , US 3 947 614 each deal with devices and methods for coating the edges of metallic workpieces.

[0004] The invention can be applied to workpieces designed as door leaves and door frame elements, for example, made of a wood-based material. These workpieces each have workpiece edges that result from the cutting surfaces during production. Various measures are known to protect the workpiece edges against the effects of liquids.

[0005] For example, it's common practice for door panels to have one or more edges covered with a lipping, e.g., made of plastic. While this can provide good protection against unwanted liquid penetration through the door edge, the process of attaching the lipping makes the door panel relatively complex.

[0006] It is also known to protect the workpiece edges of door leaves and door frame elements against the effects of liquids using a liquid sealant, for example from documents US 3,597,788, US 2,257,316, and DE 10 2018 104 869 A1. For this purpose, the sealant is typically sprayed onto the corresponding workpiece edge. However, with this procedure, a certain proportion of the sprayed sealant is not absorbed by the workpiece edge, but rather settles in other areas or escapes into the environment as spray mist. This phenomenon is also referred to as overspray and results in an inefficient application process, since a significant portion of the sealant cannot be used to seal the workpiece edges.Against this background, the task arises of protecting the edges of plate-shaped workpieces, such as door leaves and door frame elements, from the penetration of liquids with little effort and high efficiency.

[0007] To achieve the object, a method is proposed for applying a sealing agent to a workpiece edge of a workpiece, in particular a plate-shaped one, made of a wood material, using a device which has a conveying device for moving the workpiece relative to a sponge element, wherein the sealing agent is applied by means of the sponge element which is impregnated with the sealing agent, wherein the sponge element is impregnated by applying the sealing agent to a first surface of the sponge element which is different from a second surface of the sponge element which is brought into contact with the workpiece edge for applying the sealing agent to the workpiece edge.

[0008] A further subject of the invention is a device for applying a sealing agent to a workpiece edge of a workpiece, in particular a plate-shaped workpiece made of a wood material, with a conveying device for moving the workpiece relative to a sponge element and a device for impregnating the sponge element with the sealing agent, which is designed such that the sealing agent is applied to a first surface of the sponge element, which is different from a second surface of the sponge element with which the sealing agent is applied to the workpiece edge.

[0009] According to the invention, a sponge element is used to apply the sealant, which is provided in particular in liquid form. A sponge element, in the sense of the present invention, is understood to be an element made of a soft, porous material that can absorb liquids. According to the invention, the sponge element is impregnated with the sealant, so that the sealant is absorbed in the sponge element, in particular in pores or free spaces of the sponge element, before the sealant is applied to the workpiece edge. The sponge element impregnated with the sealant enables uniform application over the entire contact surface of the sponge element with the workpiece edge, i.e., the short lateral surface along the thickness direction of the plate-shaped workpiece.In contrast to applying the sealant by spraying, no sealant is released into the environment in the form of a spray mist. This makes it possible to provide a resource-saving and efficient application process in which the application of an edge band can be dispensed with. In the context of the present invention, a sealant is understood to be a low-viscosity, in particular liquid, agent which can penetrate into the workpiece in the region of the workpiece edge, for example into its pores. In particular, the sealant does not block these pores, so that the workpiece remains permeable to diffusion. In particular, the sealant is designed to make the surface of the workpiece hydrophobic. As a result, the absorbency of the workpiece is reduced and the formation of water balls or droplets on the surface of the workpiece is promoted.According to an alternative embodiment of the sealing means, the sealing means is designed so that the sealing means which has penetrated into the workpiece forms a substantially diffusion-tight region there, in particular a substantially diffusion-tight layer, whereby the penetration of liquids, in particular water, is made more difficult.

[0010] The workpiece is made of a wood-based material. For example, the workpiece can be made of a solid wood material, a veneer material, a particle board material, a wood fiber material, or a wood composite material.

[0011] According to an advantageous embodiment of the invention, the workpiece is a door leaf and the workpiece edge is a door leaf edge, in particular a bottom edge of the door leaf. This allows the use of a cost-effective method for providing the door leaf. For example, it is possible for the door leaf edge to be formed by sawing and not to have undergone any subsequent treatment, in particular surface treatment. The cut surface formed by sawing can then be sealed by the method or device according to the invention in order to protect the workpiece against the penetration of liquids through the cut surface. Applying the sealing agent to the bottom edge of the door leaf has proven advantageous for door leaves that are used in wet rooms or in rooms in which increased humidity, particularly in the floor area, may occur.In this way, the risk of moisture penetrating the door leaf from below can be reduced.

[0012] According to an alternative, advantageous embodiment of the invention, the workpiece is a door frame element, and the workpiece edge is a door frame edge of a door frame element. The door frame element can be, for example, a lateral door frame element, which is arranged as part of the door frame to the side of the door leaf, or an upper door frame element, which is arranged as part of the door frame above the door leaf.

[0013] According to the invention, the sponge element is impregnated by applying the sealing agent to a first surface of the sponge element, which is different from a second surface of the sponge element, which is brought into contact with the workpiece edge for applying the sealing agent to the workpiece edge. In the device according to the invention, the device for impregnating the sponge element with the sealing agent is designed such that the sealing agent is applied to a first surface of the sponge element, which is different from a second surface of the sponge element, with which the sealing agent is applied to the workpiece edge. The first surface can be a surface of the sponge element facing away from the workpiece.In this way, a compact design of the device can be enabled, in which the sealing agent, starting from the first surface, passes through the sponge element to the second surface, in particular through capillary action of the pores or free spaces of the sponge element and / or diffusion. The device for impregnating the sponge element can comprise a pump for conveying the sealing agent to the sponge element.

[0014] According to an advantageous embodiment of the invention, a drainage element is arranged below the sponge element, in which excess sealing agent is collected. The drainage element can collect sealing agent that escapes from the sponge element and does not reach or enter the workpiece and returns it to a sealing agent circuit for re-application to the sponge element. The sealing agent circuit can, for example, comprise the previously mentioned pump for conveying the sealing agent. This pump is preferably designed and arranged such that it sucks in the sealing agent collected by the drainage element and makes it available for re-application to the sponge element. Optionally, it can be provided that the sealing agent is processed, in particular filtered, before being re-applied to the sponge element.For this purpose, a sealing agent preparation device, in particular a filter device, can be provided. The sealing agent circuit preferably comprises a sealing agent addition device, via which fresh sealing agent can be supplied to the sealing agent circuit. According to the invention, the device comprises a conveyor device for moving the workpiece relative to the sponge element.

[0015] According to an advantageous embodiment of the invention, the sponge element is a sponge roller. The sealing agent can be applied to the workpiece edge via the outer contour of the sponge roller. This enables a compact design of the device, in which the workpiece is conveyed past the roller. For this purpose, the device can comprise a conveyor device that enables continuous conveyance of the workpiece along the sponge roller, for example, a conveyor belt or a conveyor chain.

[0016] According to an advantageous embodiment of the invention, the sponge roller is rolled along the edge of the door leaf or door frame to apply the sealant. This allows the outer contour, in particular the cylindrical surface of the sponge roller, to be used to apply the sealant over the entire circumference of the sponge roller.

[0017] The device according to the invention preferably comprises a rotary drive for rotating the sponge roller. The sponge roller is preferably rotated by a rotary drive, in particular about a longitudinal axis, for example a cylinder axis, of the sponge roller.

[0018] The sponge roller is preferably hollow-cylindrical. Particularly preferably, the sealing agent is applied to the sponge roller along an inner contour of the sponge roller. In this respect, the interior space of the sponge roller provided by the hollow-cylindrical shape can be used to supply the sealing agent to the sponge roller. The sealing agent can move through the sponge roller, in particular, radially, i.e., perpendicular to the longitudinal, cylindrical, or rotational axis of the sponge roller.

[0019] According to an advantageous embodiment of the invention, the same sealing agent or a different sealing agent is applied to the workpiece edge by means of a further sponge element designed as a sponge roller, which is impregnated with the respective sealing agent. The device according to the invention can therefore comprise a further sponge element designed as a sponge roller. Furthermore, the device can comprise a further device for impregnating the further sponge element with the sealing agent. The sponge element or the further sponge roller can close any gaps in the seal that may arise, for example, when the sealing agent is applied by means of the first sponge element. The formation of such defects in the seal can occur, for example, when the workpiece comes into contact with a larger pore in the sponge element.If a drainage element is arranged below the sponge element to collect excess sealant, the drainage element is preferably also arranged below the additional sponge element, so that the excess sealant from both sponge elements can be collected via the same drainage element. If a different sealant is applied with the additional sponge element than with the first sponge element, a two-component seal can be formed on the workpiece.

[0020] According to an advantageous embodiment of the invention, the sponge element is a sponge stamp. The sealing agent can be applied to the workpiece edge via a stamping surface of the sponge stamp. The device can have a conveyor device that enables discontinuous conveyance of the workpiece along the sponge roller, for example, a conveyor belt or a conveyor chain.

[0021] According to an advantageous embodiment of the invention, it is provided that the sponge stamp is moved from a rest position, in which the sponge stamp is arranged at a distance from the workpiece edge, into an application position in which the sponge stamp is in contact with the workpiece edge. The device according to the invention preferably comprises a linear drive for moving the sponge stamp between a rest position, in which the sponge stamp is arranged at a distance from the workpiece edge, and an application position in which the sponge stamp is in contact with the workpiece edge. Preferably, the sponge stamp is pressed against the workpiece edge in the application position, in particular in such a way that a predetermined pressing force acts on the workpiece edge. Preferably, the workpiece is not moved relative to the sponge stamp when the sponge stamp is in the application position.

[0022] To apply the sealant to the edge of the same workpiece, the sponge stamp is preferably moved back and forth several times between the rest position and the application position, with the sponge stamp being brought into contact with different areas of the workpiece edge in the application position. This design offers the advantage that a sponge stamp can be used that is smaller than the workpiece edge. Nevertheless, this sponge stamp can apply the sealant to the entire workpiece edge.

[0023] According to an advantageous embodiment, the workpiece is pressed against the sponge element along a first direction, in particular by means of a first conveying device. Optionally, it can be provided that the sponge element - before the workpiece is pressed against the sponge element - is moved from a rest position, for example a rest position remote from the conveying device, into a standby position in which the sponge element is arranged closer to the conveying device and in which the workpiece can be pressed against the sponge element by means of the conveying device. Particularly preferably, a further workpiece is pressed against the sponge element along a second direction, in particular by means of a second conveying device, wherein the second direction is opposite to the first direction.In such a configuration, the sponge element can be moved from a rest position, for example a rest position remote from the conveyor device, into a standby position in which the sponge element is arranged closer to the conveyor device and in which the workpieces can be pressed against the sponge element by means of the first and second conveyor devices, before the workpieces are pressed against the sponge element.

[0024] A further subject of the invention is a door leaf with a door leaf upper edge, a first door leaf side edge, a second door leaf side edge opposite the first door leaf side edge and a door leaf lower edge, wherein a sealing agent is applied to the door leaf lower edge, in particular by means of a method described above.

[0025] According to an advantageous embodiment of the door leaf according to the invention, it is provided that the upper edge of the door leaf and the first and second side edges of the door leaf are coated with a coating agent, in particular painted.

[0026] Another subject of the invention is a door frame element with a door frame edge to which a sealing agent is applied using a method described above. The door frame element can, for example, be a lateral door frame element, which is arranged as part of the door frame to the side of the door leaf, or an upper door frame element, which is arranged as part of the door frame above the door leaf. Further details and advantages of the invention will be explained below with reference to the exemplary embodiments shown in the figures. Herein:

[0027] Fig. 1 shows a door leaf and a door frame according to an embodiment of the invention in a schematic view;

[0028] Fig. 2 shows a door leaf according to an embodiment of the invention in a schematic, perspective view;

[0029] Fig. 3 shows a device for applying a sealing agent to a

[0030] Workpiece edge according to a first embodiment of the invention in a schematic side view;

[0031] Fig. 4 shows a device for applying a sealing agent to a workpiece edge according to a second embodiment of the invention in a schematic perspective view; and

[0032] Fig. 5 shows a device for applying a sealing agent to a workpiece edge according to a third embodiment of the invention in a schematic perspective view.

[0033] The illustration in Fig. 1 shows several plate-shaped workpieces 2, 11, 12, 13 made of a wood-based material, the workpiece edges of which have been sealed using a method according to an embodiment of the present invention. The workpieces 2, 11, 12, 13 are designed as a door leaf 2 and as door frame elements 11, 12, 13 of a door frame 1.

[0034] The door frame 1 is designed to enclose the door leaf 2 on three sides. The corresponding door frame elements 11, 12, 13 are an upper door frame element 13 and two lateral door frame elements 11, 12, which are connected to one another by the upper door frame element 13. The door frame elements 11, 12 each border the door leaf 2 with a door frame edge 11.1, 12.1, 13.1. A sealing agent has been applied to these door frame edges 11.1, 12.1, 13.1 using a method according to an embodiment of the present invention. Optionally, other door frame edges of the door frame elements 11, 12, 13 can also be provided with a sealing agent in this way. The door leaf 2 is shown in detail in Fig. 2 and comprises two essentially plane-parallel door leaf surfaces, of which only the front door leaf surface 25 is visible in Fig. 2.The short side surfaces of the door leaf 2, which connect the door leaf surfaces 25 to one another, are referred to as door leaf edges. The door leaf 2 comprises a lower door leaf edge 24, to which a sealing agent has been applied according to a method according to an embodiment of the present invention. Optionally, further door leaf edges 21, 22, 23 of the door leaf 2 can also be provided with a sealing agent in this way. However, a preferred embodiment is one in which a first door leaf side edge 21 and a second door leaf side edge 22 opposite the first door leaf side edge 21, as well as a door leaf top edge 23, are coated with a coating agent, for example a varnish.

[0035] The illustration in Fig. 3 shows a first embodiment of a device 100 for applying a sealing agent to a plate-shaped workpiece, in particular a door leaf 2 or door frame element 11, 12, 13 shown in Fig. 1 or 2.

[0036] The device 100 comprises a sponge element 110 for applying the sealing agent to the respective workpiece edge. The sponge element 110 is designed as a sponge roller, but can alternatively also be configured as a sponge stamp. Part of the device 100 is also a first conveyor device 101, by means of which the workpiece is fed to the sponge element along a conveying direction F. The first conveyor device 101 can be designed as a belt conveyor, chain conveyor, or roller conveyor. The workpiece can be fed onto the first conveyor device 101 in a direction transverse to the conveying direction F of the latter, for example by an upstream production device (not shown in Fig. 3), such as a milling device or a gluing device.The first conveyor device 101 conveys the workpiece 2, 11, 12, 13 past the sponge element 110 in such a way that the sponge element can come into contact with the edge of the workpiece for the application of the sealing agent. If the sponge element 110 is designed as a sponge roller, it is advantageous if the first conveyor device 101 conveys the workpiece 2, 11, 12, 13 in a continuous movement, i.e. at a constant speed with contact between the workpiece edge and the sponge roller. If the sponge element 110 is designed as a sponge stamp, it is advantageous if the first conveyor device is designed to move the workpiece discontinuously, i.e. step by step. For example, the first conveyor device 101 can convey the workpiece 2, 11, 12, 13 at a constant speed into an area next to the sponge stamp and stop the workpiece 2, 11, 12, 13 there.The sponge stamp can then be brought into contact with the workpiece edge to apply the sealant. After the sponge stamp has been removed from the workpiece edge, the workpiece can be transported away. During this transport, the first conveyor device 101 can be assisted by a second conveyor device 102, which is arranged downstream of the sponge element 110. The second conveyor device 102 can be designed as a belt conveyor, chain conveyor, or roller conveyor. Preferably, the workpiece is conveyed by the second conveyor device 102 in a direction identical to the conveying direction F of the first conveyor device 101. A conveyor device feeds the workpiece to the sponge element 110 and also transports it away.

[0037] According to the invention, the sponge element 110 is impregnated with the sealing agent. For this purpose, the device 100 comprises a device 111 for impregnating the sponge element 110. This impregnation device 11 is connected to a pump via lines not shown in the drawing, which pumps the sealing agent to the sponge element 110. The impregnation device 111 applies the sealing agent to the sponge element 110, preferably to a first surface of the sponge element 110, which is different from a second surface of the sponge element 110, with which the sealing agent is applied to the workpiece edge. In the sponge element 110 shown here, which is designed as a hollow cylindrical sponge roller, the sealing agent is applied from the inside, so that the sealing agent radially permeates the sponge roller and can be released onto the outside, the cylindrical surface.

[0038] The device 100 further comprises a drainage element 112, which can collect and drain excess sealing agent. The drainage element 112 is preferably arranged below the sponge element so that the excess sealing agent can drip into the drainage element 100 in the direction of gravity.

[0039] The illustration in Fig. 3 further shows that the sponge element 110, designed as a sponge roller, is connected to a rotary drive 113, by which the sponge roller can be rotated. In this respect, the sponge roller can be actively driven to roll along the moving workpiece edge and thereby apply the sealing agent to the workpiece edge.

[0040] Fig. 4 shows a second embodiment of a device 100 for applying sealant. In this embodiment, the sponge element 110 is designed as a sponge roller. The sponge roller is hollow-cylindrical and mounted for rotation about a rotation axis D. A drain element 112 is arranged below the sponge element 110, which can collect and drain away excess sealant. The drain element 112 is designed like a collecting tray.

[0041] Fig. 5 shows a third embodiment of a device 100 for applying sealing agent. In this embodiment, the sponge element 110 is designed as a sponge stamp. The sponge stamp is arranged in a frame-like housing 115. On the top side of the housing 115, two inlets 116 are provided for supplying sealing agent into the interior of the housing 115. Via these inlets 116, the sealing agent is conveyed to the rear side of the sponge element 110, from where it permeates the sponge element 110. In this respect, the sealing agent is applied to a side of the sponge element 110 that faces away from the front side of the sponge element 110, which comes into contact with the workpiece edge to be sealed.The sponge element 110 can be moved by a linear drive (not shown) from a rest position, in which the sponge stamp is arranged at a distance from the workpiece edge, into an application position in which the sponge element 110 is in contact with the workpiece edge.

[0042] The workpiece is conveyed by a conveyor device (not shown) to the sponge element 110 and then briefly stopped moving relative to the sponge element 110. During this stationary phase, the sponge element 110 extends toward the workpiece and applies sealing agent to a first area of ​​the workpiece edge. The workpiece is then moved further by the conveyor device. To apply the sealing agent to the edge of the same workpiece, the sponge element 110 is preferably moved back and forth several times between the rest position and the application position, with the sponge element 110 being brought into contact with different areas of the workpiece edge in the application position.

[0043] The device 100 further comprises a drainage element 112, which can collect and drain away excess sealing agent. The drainage element 112 is preferably arranged below the sponge element so that the excess sealing agent can drip into the drainage element 100 in the direction of gravity. The drainage element 112 is designed like a collecting tray. On the drainage element 112, in particular at a lowest point of the drainage element 112, an outlet 114 is provided, through which the sealing agent can be drained from the drainage element 112. With the devices 100 described above for applying a sealing agent to a workpiece edge 11.1, 12.1, 13.1, 21, 22, 23, 24 of a plate-shaped workpiece 2, 11, 12, 13, the sealing agent can be applied by means of a sponge element that is impregnated with the sealing agent.The sealant can penetrate into the workpiece during and / or after application and protect it against unwanted penetration of liquids.

[0044] Reference symbol:

[0045] 1 door frame

[0046] 2 door leaves

[0047] 11 side door frame element

[0048] 11.1 Door frame edge

[0049] 12 side door frame element

[0050] 12.1 Door frame edge

[0051] 13 upper door frame element

[0052] 13.1 Door frame edge

[0053] 21 side door leaf edge

[0054] 22 side door leaf edge

[0055] 23 upper door leaf edge

[0056] 24 lower door leaf edge

[0057] 25 front door leaf surface

[0058] 100 Device for applying a sealing agent to a workpiece edge

[0059] 101 first funding institution

[0060] 102 second conveyor

[0061] 110 Sponge element

[0062] 111 Drinking facility

[0063] 112 Drain element

[0064] 113 Rotary drive

[0065] 114 outlets

[0066] 115 housings

[0067] 116 Inlet

Claims

1. A method for applying a sealing agent to a workpiece edge (11.1, 12.1, 13.1, 21, 22, 23, 24) of a workpiece (2, 11, 12, 13), in particular a plate-shaped workpiece (2, 11, 12, 13) made of a wood material, with a device which has a conveyor device (101) for moving the workpiece (2, 11, 12, 13) relative to a sponge element (110), wherein the sealing agent is applied by means of the sponge element (110) which is impregnated with the sealing agent, wherein the sponge element (110) is impregnated by applying the sealing agent to a first surface of the sponge element (110), which is different from a second surface of the sponge element (110) which is used for applying the sealing agent to the workpiece edge (11.1, 12.1, 13.1 , 21 , 22, 23, 24) is brought into contact with the workpiece edge (11.1 , 12.1 , 13.1 , 21 , 22, 23, 24).

2. Method according to claim 1, characterized in that the workpiece (2) is a door leaf and the workpiece edge (21, 22, 23, 24) is a door leaf edge, in particular a lower edge of the door leaf (2).

3. Method according to claim 1, characterized in that the workpiece (11, 12, 13) is a door frame element and the workpiece edge (11.1, 12.1, 13.1) is a door frame edge of a door frame element.

4. Method according to one of the preceding claims, characterized in that a drainage element (112) is arranged below the sponge element (110), in which excess sealing agent is collected.

5. Method according to one of the preceding claims, characterized in that the sponge element (110) is a sponge roller, in particular wherein the sponge roller is unrolled to apply the sealing agent to the door leaf edge (21, 22, 23, 24) or the door frame edge (11.1, 12.1, 13.1).

6. Method according to claim 5, characterized in that the sponge roller is rotated by a rotary drive.

7. Method according to one of claims 5 or 6, characterized in that the sponge roller is hollow-cylindrical.

8. Method according to claim 7, characterized in that the sealing agent is applied to the sponge roller on an inner contour of the sponge roller.

9. Method according to one of claims 5 to 8, characterized in that the same sealing agent or a different sealing agent is applied to the workpiece edge by means of a further sponge element designed as a sponge roller, which is impregnated with the respective sealing agent.

10. Method according to one of claims 1 to 4, characterized in that the sponge element (110) is a sponge stamp.

11. The method according to claim 10, characterized in that the sponge stamp is moved from a rest position, in which the sponge stamp is arranged at a distance from the workpiece edge (11.1, 12.1, 13.1, 21, 22, 23, 24), into an application position in which the sponge stamp is in contact with the workpiece edge (11.1, 12.1, 13.1, 21, 22, 23, 24).

12. The method according to claim 11, characterized in that the sponge stamp is moved back and forth several times between the rest position and the application position for applying the sealing agent to the workpiece edge (11.1, 12.1, 13.1, 21, 22, 23, 24) of the same workpiece, wherein the sponge stamp is brought into contact with different areas of the workpiece edge (11.1, 12.1, 13.1, 21, 22, 23, 24) in the application position.

13. The method according to claim 10, characterized in that the workpiece is pressed against the sponge element, in particular by means of a first conveying device, along a first direction, wherein preferably a further workpiece is pressed against the sponge element, in particular by means of a second conveying device, along a second direction, wherein the second direction is opposite to the first direction.

14. Device for applying a sealing agent to a workpiece edge (11.1, 12.1, 13.1, 21, 22, 23, 24) of a workpiece (2, 11, 12, 13), in particular a plate-shaped workpiece, made of a wood material, characterized by a conveyor device (101) for moving the workpiece (2, 11, 12, 13) relative to a sponge element (110), and a device for impregnating the sponge element (110) with the sealing agent, which is designed such that the sealing agent is applied to a first surface of the sponge element (110), which is different from a second surface of the sponge element (110), with which the sealing agent is applied to the workpiece edge (11.1, 12.1, 13.1, 21, 22, 23, 24).

15. Device according to claim 14, characterized in that the sponge element (110) is a sponge roller, wherein the device (100) preferably comprises a rotary drive (113) for rotating the sponge roller (110).

16. Device according to claim 15, characterized in that the sponge roller is hollow-cylindrical.

17. Device according to claim 14, characterized in that the sponge element (110) is a sponge stamp, wherein the device (100) preferably has a linear drive for moving the sponge stamp (110) between a rest position, in which the sponge stamp (110) is arranged at a distance from the workpiece edge (11.1, 12.1, 13.1, 21, 22, 23, 24), and an application position, in which the sponge stamp (110) is in contact with the workpiece edge (11.1, 12.1, 13.1, 21, 22, 23, 24).

18. Device according to one of claims 14 to 17, characterized in that a drainage element (112) is arranged below the sponge element, in which excess sealing agent is collected.

19. Device according to one of claims 14 to 18, characterized in that the device for impregnating the sponge element (110) comprises a pump for conveying the sealing agent to the sponge element.

20. Device according to claim 18, characterized in that the device for impregnating the sponge element (110) comprises a pump for conveying the sealing agent to the sponge element, wherein the pump is designed and arranged such that it sucks in the sealing agent collected by the drain element (112) and makes it available for renewed application to the sponge element.

21. Door leaf with a door leaf upper edge (23), a first door leaf side edge (21), a second door leaf side edge (22) opposite the first door leaf side edge (21) and a door leaf lower edge (24), characterized in that a sealing agent is applied to the door leaf lower edge (24), in particular by means of a method according to one of claims 1 to 9.

22. Door frame element with a door frame edge (11.1, 11.2, 11.3) to which a sealing agent is applied by means of a method according to one of claims 1 to 9.

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