AT525597A1 - Method for manufacturing a door frame for a building door and a door frame - Google Patents

Abstract

The invention relates to a method for producing a door frame (10) for a building door with an inner surface (16) pointing into a door opening (14) and a front surface (18) which forms the visible end face of the door frame (10), the inner surface ( 16) and the front surface (18) each define a plane and the planes have a line of intersection. The method comprises creating a v-shaped groove in the region of the straight line of intersection, the v-shaped groove extending along the straight line of intersection, coating the groove surface defining the v-shaped groove with an adhesive and/or coating a plastic strip (22) with an adhesive, inserting a/the plastic strip (22) into the v-shaped groove, and milling over the plastic strip (22) glued into the v-shaped groove (20). The invention also relates to a door frame (10) which is produced by the method.

Description

neuform-TürenwerkHans Glock GmbH & Co. KG

Method for producing a door frame for a building door and a

door frame

The invention relates to a method for producing a door frame for a

building door. The invention also relates to a door frame produced in this way.

Door frames in buildings are exposed to external mechanical loads. This applies in particular to the edges that protrude into the door opening, such as the edges of the decorative trim and those of the

folded cladding.

The term "door frame" generally includes all frames that are used to fasten a door leaf in a wall cut-out, e.g. wrap-around frames, block frames, stick frames, block frames or blind frames. This applies regardless of the material used for the door frame and the

design of the surface.

DE 22 53 937 A describes an adjustable door frame for different wall thicknesses. A groove is milled into the door frame. The enclosed surfaces are covered with a thin, sheet-like plastic sheeting. This is to keep the plywood from showing. The foil covering

is pulled around corners and edges.

AT 005 211 U1 shows a door frame in which an extra-wide, profiled plastic strip completely covers the stepped inner surface, just like an edge band on a plywood panel. The edges protruding from the two opposite front surfaces are

cut off.

External mechanical stresses on the edges of the door frame often result in damage, which manifests itself in the form of visual defects

such as paint chips, scratches and dents.

This particularly affects those door frames that have a high frequency of users

subject. Example of this are door frames for doors in hotels or

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hospitals are used. The high frequency of use by guests, hotel staff and patients often results in damage, for example because luggage or beds are moved in and out of the room and the door frame can be damaged due to the lack of space. Other examples of heavily used door frames are those in office buildings

or installed in public buildings.

If the unwanted damage to the door frame is to be remedied, this is done either by repairing the edges and painting the door frame or, if this is not possible, by veneering the door frame

is provided by replacing the entire door frame.

The disadvantage of painting is that the paint on the edges of the door frame is less resistant when the door frame has been repainted, which means that renewed damage occurs more quickly. In addition, the repair costs

tied together.

A complete replacement of the door frame results in correspondingly higher repair costs, since the effort and the associated manual work are significantly more complex. In addition, it can lead to unwanted noise and a severely limited availability of the

affected area.

The object of the invention is to provide a door frame whose edges have increased resistance to external mechanical influences, thereby increasing the durability of the door frame. For this purpose, a new process is to be created that supports such robust door frames

produced at low cost and high quality.

The stated object is achieved according to the invention by a method for producing a door frame for a building door, with at least one inner surface pointing into a door cutout and at least one front surface that forms a visible end face of the door frame, the at least one inner surface and the at least one front surface each having a Define a plane and the planes have a line of intersection, characterized by the following

Process steps:

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a) Creating a v-shaped groove in the area of the intersection line, where

the V-shaped groove extends along the cutting line;

b) coating the groove surface defining the v-shaped groove with an adhesive and/or coating a plastic strip with an adhesive;

c) inserting a/the plastic strip into the V-shaped groove; and

d) Milling over the plastic strip glued into the V-shaped groove

on the front surface and the inner surface.

The basic idea of the invention is to replace the edge of the door frame, which was previously made of the same material as the door frame itself, which is sensitive to external mechanical stresses due to the low material thickness at the edge, with the plastic strip. The plastic strip can consist of ABS. The paint on the edges of metal door frames is extremely sensitive and can flake off. Here, too, the use of the plastic strip is a good idea. In this case, a V-shaped groove is made in the edge of the door frame, into which the plastic strip is glued, which forms a more resistant edge of the door frame than one that is also made of the door frame material itself or one that is painted. The v-shaped groove provides a sufficiently large surface area to securely glue the plastic strip to the groove surfaces. Material and/or manufacturing tolerances can be compensated for by the final milling of the plastic strip glued into the groove on the inner surface and the front surface and it is ensured that the sides of the plastic strip flow smoothly into the inner surface and front surface of the door frame

pass over

The plastic strip is therefore not or hardly visible. Also, the overmilling does not result in a step to the adjacent surfaces. The front surface of the door frame can preferably extend at right angles to the inner surface. The front surface and the inner surface also have a common line of intersection when viewed in cross-section, considering the planes connecting both surfaces

define, considered.

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In this over-milling of the plastic strip, the door frame on the front surface and the inner surface adjacent to the plastic strip is optionally also over-milled, in order to avoid any paragraph on the front surface and the inner surface between the plastic strip and the adjacent wood or

to have metal.

The plastic strip is inserted exclusively into the v-shaped groove and replaces exclusively and completely (apart from an optional, minimal radius on the outer edge of the plastic strip) the material that was previously milled out. Thus, the plastic strip consists exclusively of the

V-shaped groove defining groove surfaces in contact.

The plastic strip finally outside the groove to the inner surfaces or

front surface not on.

Advantageously, before step a), a miter cut or a V-shaped groove can be made in a panel, whereby the panel is divided into an inner part, which includes the inner surface, and a front part, which includes the front side. The inside part and the front part are joined together at right angles to form an edge along the surfaces newly created by the miter cut or the V-shaped groove. Both the miter cut and the V-shaped groove represent an extremely simple process cut to divide one panel into two panels and at the same time to create the newly created surfaces, which have a 45° angle to the outer surface of the panel, to create the inside To connect part and the front part together. The miter cut also has the advantage that the resulting material waste is extremely low. The V-shaped groove, on the other hand, proves to be advantageous if the panel is provided with a grain and the grain should continue to merge smoothly along the inside and the front part. Here speaks

one from a so-called "folding" of the material.

The inner surface can be formed by an inside part and the front surface by a front part. That is, the parts meet at the

edge.

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Alternatively, the inner surface is formed in sections by an inside part and in sections by a front part and the front surface by the front part alone. Here is the front part with its back

on the face of the inside part.

A third alternative provides that the inner surface is formed by an inside part and the front surface is formed in sections by the inside part and in sections by a front part. In this case, the front part rests with its side face on the back of the inside part. In the last two alternatives, only one of the parts forms an edge of the frame that lies in the cutting line. Depending on the requirements for the door frame and the selected construction, the respective one turns out to be

arrangement as advantageous.

The door frame can have at least one visible outer surface facing away from the inner surface, as is the case with block frames or blind frames. The outer surface defines a plane and its plane defines at least one line of intersection with the plane of the at least one front surface, steps a) to d) also being carried out along this line of intersection

become.

The v-shaped groove in step a) can be produced by milling in the inside part and/or front part along the edge. The introduction of the groove by milling turns out to be procedurally simple, precise and

fast.

Alternatively, the V-shaped groove can be formed in step a) by a lateral offset of the inside and front-side parts, with the end faces of the parts each forming one side of the V-shaped groove. The lateral offset allows the door frame to be manufactured without the v-shaped groove having to be milled. In this way, a process step can be excluded and

material waste can be reduced.

The adhesive used in step b) is advantageously an adhesive tape or a hot-melt adhesive. The adhesive tape has the advantage that it has already been applied to the plastic strip in advance and the plastic strip is directly in

the groove can be glued in. The hot-melt adhesive is characterized by

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that it is easy to handle, especially in a continuous process, and that it has established itself in wood and furniture construction due to its good holding power between plastic and wood. The hot-melt adhesive is therefore suitable

especially for wooden door frames.

The plastic strip is advantageously attached in step c) exclusively by gluing and there is no form-fitting connection. This makes the process more economical, as there are no complex geometries in the door frame

have to be milled.

The plastic strip is advantageously unwound from a roll in steps b) and/or c). As a result, the plastic strip can be accommodated in a space-saving manner in the production process and is also easier to handle in a continuous process. In addition, the plastic strip can

any length of the V-shaped groove can be adjusted.

The door frame can be made from at least one veneered panel. A veneered board can be easily processed and is cheaper

as a solid wood panel.

The plastic strip is advantageously pressed into the groove after step c) and before step d) by means of a pressure roller. This ensures that the plastic strip is fully inserted into the groove and the adhesive between the plastic strip and the groove forms a reliable, full-surface connection

manufactures.

The plastic strip advantageously has a rectangular cross-sectional profile. The rectangular cross-sectional profile has the advantage that it is particularly easy to introduce into the V-shaped groove and that the surfaces of the groove are in surface contact with two sides of the plastic strip, so that the adhesive can develop its maximum adhesive strength. Furthermore, a pressure roller, better even two pressure rollers, can control the force very precisely

apply to the plastic strip in a defined manner.

The edge length of the rectangular cross-sectional profile of the plastic strip is preferably 2 mm×2 mm. These dimensions have been tested in experiments

proved beneficial and make sure the edge of the door frame

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reacts insensitively to external mechanical loads and at the same time

is so fine that the aesthetics of the door frame is not adversely affected.

The overmilling in step d) can be done by means of a rounding cutter, in particular using a tool-side spacer that rests on the frame. The rounding cutter rounds the exposed edge of the plastic strip, making it even more resilient. The tool-side spacer also has the advantage that the milling cutter is aligned with the inner surface or front surface and is flush with the plastic strip

milled to the adjacent surfaces.

Steps a) to d) are preferably carried out in a continuous process. The continuous process is an extremely efficient process for the production of door frames, the process steps can be carried out continuously one after the other in a production line and it is also possible to produce door frames in

produce variable dimensions.

Since the plastic strips after production do not have exactly right-angled and/or flat side surfaces when viewed in cross section due to the production tolerances, there is a risk that they will not sit without a gap in the groove and that adhesive will therefore have to fill the gap. In order to achieve even higher quality, above all a so-called zero joint between the plastic strip and the wood or metal, the plastic strip is milled over at least on those sides of the plastic strip before it is inserted into the V-shaped groove that are on the groove surfaces defining the groove on the wood or metal. This gives the plastic strip two flat and exactly perpendicular to each other

Sides that are in full contact with the assigned groove surfaces without a gap.

The object mentioned is also achieved by a door frame, which is produced by the method according to the invention, with an inside and a front part made of a veneered panel, which are connected to each other in 45 ° to the outside running surfaces, the edge thus produced the v -shaped groove has. The resulting advantages are the

refer to the paragraphs above.

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The invention is described below with reference to various embodiments which are illustrated in the accompanying drawings. In these

show:

- Figure 1 is a perspective schematic view of a door frame according to the invention, representative of various

embodiments;

- Figure 2 is a section along the plane II-II of Figure 1 according to a

first option;

- Figure 3 is a section along the plane II-II of Figure 1 according to a

second option;

- Figure 4 is a section along the plane II-II of Figure 1 according to a

third option;

- Figure 5 is a section along the plane II-II of Figure 1 according to a

fourth option;

FIG. 6 shows the detail A of FIG. 1 in section along the plane II-II according to a first variant with an internal and a

front part mitred;

- Figure 7a shows the detail A of Figure 1 as a section along the plane II! II-II according to the second variant with an inside part and a

front part on butt;

- Figure 7b shows the detail A of Figure 1 as a section along the plane II! II-II according to the second variant with the inside part and the

front part on butt;

FIG. 8 shows detail A of FIG

front part butted with a lateral offset;

- Figure 9 shows a first step of the inventive method for manufacturing a door frame, in which a V-shaped groove in a plate

is introduced;

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- Figure 10 shows an alternative first step of the method for manufacturing a door frame according to the invention, in which a

Miter cut is made in a plate;

- Figure 11 shows a second step of the method according to the invention

which creates a v-shaped groove;

FIG. 12 shows a third and fourth step of the method according to the invention, in which a plastic strip is glued into the V-shaped groove and pressure is applied to it by a pressure roller;

and

- Figure 13 shows a fifth step of the method according to the invention

which the plastic strip is milled over.

In Figure 1 there is a schematic of a door frame 10 in a building wall 12

shown.

The door frame 10 defines a door opening 14 which can be closed by a door. In order to improve clarity, the door is not shown in FIG. Furthermore, the door frame 10 has an inner surface 16 pointing into the door opening 14 and a front surface 18 on each side of the building wall 12, which forms the visible end face of the door frame 10.

The front surface 18 extends at right angles to the inner surface 16.

The inner surface 16 and the front surface 18 each define a plane, the planes intersecting in a line of intersection along which a v-

shaped groove 20 (see e.g. Figure 2).

The inner surface 16 and the front surface 18 are formed by an inner part 24 and a front part 26 . Both parts 24, 26 are panels made of wood, i.e. solid wood or veneer, for example. The arrangement and attachment of the parts 24, 26 can be done according to different variants, which are based on the

Figures 6, 7a, 7b and 8 are explained below.

As shown in FIG. 2, the door frame 10 can consist of two cross-sections L-

Assemble shaped components, each consisting of an inside

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Part 24 and a front part 26 exist. The section of the building wall 12 is completely covered by the components, the front parts 26 extending parallel to the building wall 12 and the inside parts 24 are aligned parallel to the wall section of the building wall 12 . The end faces of the inside parts 24, which face away from the front part 26, are pronounced in such a way that they have a complementary structure that allows the two end faces of the inside parts 24 to mesh. An inside part 24 protrudes further inwards than the part 24 it overlaps, resulting in a deflection for the door leaf. The further outboard part 24 is screwed to the building wall 12 and to the lateral tongue and groove connection

glued on the inner part.

Alternatively, a coupling part 28 can also be provided, which in each case receives the front ends of the inside parts 24 in grooves, as is shown in FIG. The outside of the inside part 24 and the front part 26 are each planes that intersect at an edge 27,

which forms a straight line. Edge 27 is shown enlarged in FIG.

A v-shaped groove 20 in which a plastic strip 22 is fastened is introduced into the edge 27 resulting from the inside part 24 and the front part 26 . The edge 27 defines on both sides

the door towards the door opening 14.

In addition, a V-shaped groove 20 can also be introduced in the area of an outer surface 29 (see FIG. 3), in which another plastic strip 22 can be fastened. The v-shaped groove 20 runs along a straight line of intersection which has the planes which are defined by the outer surface 29 and the front surface 18 . In the area of this

The edge 30 is located in the intersection line.

According to the first two options, both the outer surface 29 and the edge 30 are formed by the front part 26 (see Figs. 2 and 3).

According to a further option, a door frame 10 designed as a stick frame is also conceivable, as shown in FIG. The door frame 10 is inside

of the door cutout 14 arranged. The door frame 10 in Figure 4 is only

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shown schematically and can be made in one piece or made up of several individual plates, e.g. at a 45°

Interface are connected to each other.

According to a fourth option, the door frame 10 can also be designed as a blind frame, as shown in FIG. This bezel is typically positioned on the surface of the wall 12 outside of the door opening 14 and protrudes from the wall. The outer surface 29 opposite the inner surface 16 and thus also the edge 30 into which the V-shaped groove 20 with the plastic strip 22 is introduced are exposed. In addition, plastic strips 22 can and should also be provided in this embodiment on the edge between inner surface 16 and front surface 18 and, if necessary, also on the further inner surface 16, which defines the shoulder provided to the left, and a further front surface 18 positioned closer to the wall According to a first variant, the inner surface 16 is formed by the inner part 24 and the front surface 18 by the front part 26 (see FIG. 6). In this variant, both the inside part 24 and the front part 26 each have a beveled end face which extends at a 45° angle to the outside of the parts 24, 26. When the inside part 24 and the front part 26 are joined along their bevelled faces, the parts 24, 26 form a miter, so that the front part 26 extends at right angles to the inside part 24 and the parts 24, 26 form the edge 27, in the the

V-shaped groove 20 is introduced.

The v-shaped groove 20 is produced by milling and thereby by one

Face of the inside part 24 and the front part 26 formed.

According to a second variant, the inner surface 16 can be formed by the inner part 24 and the front surface 18 can be formed in sections by an end face of the inner part 24 and in sections by the front part 26 (see FIG. 7a). Thus, in this variant, one end face of the front part 26 rests on the side of the inside part 24 facing away from the door cutout 14 . The edge 27 of the door frame 10, in which the cutting line lies, is formed solely by the inside part 24, so that the two groove surfaces which are produced by milling

define v-shaped groove 20 to which inside portion 24 is associated.

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Alternatively, a variant is also possible in which the inner surface 16 is formed in sections by the inner part 24 and in sections by an end face of the front part 26 and the front surface 18 is formed solely by the front part 26 (see FIG. 7b). Thus, in this variant, an end face of the inside part 24 lies on the side of the front part 26 opposite the front face 18, so that the parts 24, 26 abut one another at right angles. In contrast to the previous variant, in this variant the groove surfaces of the milled v-shaped groove 20

formed exclusively by the front part 26.

Furthermore, according to a further variant, there can be a lateral offset of the inside part 24 and the front part 26, as a result of which a v-shaped groove 20 is produced in the region of the straight section. The sides of the V-shaped groove 20 are each formed by an end face of the parts 24,26. FIG. 8 shows, for example, how the V-shaped groove 20 can take place as a result of this lateral offset of the inside part 24 in relation to the front part 26 . The side of the inside part 24 facing away from the door cutout 14 rests on an end face of the front part 26, but does not cover it completely, so that the V-shaped groove 20 is formed. The groove 20 does not have to be milled here. The thickness of the inside part 24 defines the width of one side of the V-shaped groove 20. The width of the second side of the V-shaped groove 20 is dependent on the offset between the inside part 24 and the front part 26, but is preferably selected such that that both sides of the V-shaped groove 20 have the same dimensions. Alternatively, it is also conceivable to run the front part 26 narrow and

along the face of the inside portion 24 to move.

The method for production is described below with reference to FIGS. 9 to 13

the door frame 10 explained. The initial state is shown in FIGS.

In the initial state, a V-shaped groove 32 (see FIG. 9) is milled into a board 31, in particular a veneered board, or a miter cut 34 (see FIG. 10) is made. As a result, the plate 31 in the inside part 24, which includes the inner surface 16 and the front part 26, the

Includes front surface 18 divided.

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If a V-shaped groove 32 is made in the plate 31, the inside part 24 and the front part 26 can be folded along

of the newly created areas are connected at right angles.

If the plate 31 is divided by a miter cut 34, the parts must be moved relative to one another by 180° and can then also be connected at right angles along the newly created surfaces

get connected.

Alternatively, the plate 31 can also be divided in such a way that the parts 24, 26 are connected via the front and outer surfaces, as shown here

shown in Figure 7a, 7b or Figure 8.

If the inside part 24 and the front part 26 are connected to each other at right angles, the next step, with the exception of the arrangement shown in Figure 8, is the v-shaped groove 20 by means of a milling cutter 36 in the parts 24, 26 or only in one of the both parts 24, 26 along the edge 27 generated. The V-shaped groove 20 has a square cross-section and is formed by two mutually perpendicular groove surfaces, which during milling

arise, defined.

In the next step, the plastic strip 22 is positioned and fixed in the v-shaped groove 20 . The connection between the components is made by a

glue made.

According to one option, a hot-melt adhesive is used, with which the groove surfaces defined by the v-shaped groove 20 and/or the plastic strip 22

is coated.

According to another option, an adhesive tape is used, which the

Plastic strips 22 fixed in the v-shaped groove 20.

It is conceivable that the plastic strip 22 is already provided with an adhesive tape on its two sides facing the V-shaped groove 20 in the form of an adhesive surface, which is firmly fixed to the plastic strip 22 itself and is covered with a protective layer, which is directly in front of the Assembly of the plastic strip 22 is removed to expose the adhesive surface, so that the

Plastic strips 22 can be easily handled until assembly.

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Thus, the plastic strip 22 is attached exclusively by gluing. A positive connection through a snap-in connection or through

Keder profiles are not provided.

In order to create an invisible joint between the plastic strip 22 and the groove surfaces, the plastic strip 22 can be overmilled on its two surfaces that will later lie opposite the groove surfaces, so that these newly created contact surfaces are flat and are exactly at right angles to one another. These contact surfaces can then be provided with glue, depending

depending on how and where the glue is applied.

The plastic strip 22 is rolled onto a reel 40 from which it is continuously unwound during the process (see Figure 12). Thus, the length of the plastic strip 22 can be adjusted individually to the length of the v-shaped groove 20, which extends along the edge 27 of the inside part 24 and the front part 26

extends, to be adjusted.

The non-adhered plastic strip 22 positioned in the V-shaped groove 20 is then subjected to pressure by one or more pressure rollers 42, so that the plastic strip 22 is pushed into the V-shaped groove 20

pressed in to ensure a firm connection of the parts.

If the plastic strip 22 is introduced into the V-shaped groove 20 and reaches the end of the V-shaped groove 20, it is cut off so that it

flush with the v-shaped groove 20 ends.

Then the plastic strip 22 glued into the v-shaped groove 20 is milled over by means of a rounding cutter 44 . The exposed edge of the plastic strip 22 is provided with a radius. The rounding cutter 44 has at least one spacer 46 on the tool side, which is supported on one of the surfaces 16, 18 and ensures a flush transition of the plastic strip 22 to the surfaces 16, 18. The milling of the

Plastic strip 22 takes place along the entire edge length of edge 27.

During this over-milling, the front surface 18 and inner surface 16 formed on the outside by the plastic strip 22 are processed over the entire surface, so that the

Section of the front surface 18 and the inner surface 16, which from

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Plastic strip 22 is formed, smoothly in the section of the front surface 18

and the inner surface 16, which is formed by the wood or metal.

The section of the front surface 18 and 16 present on the wood or metal can also be milled over during this milling over of the plastic strip 22

become.

The plastic strip 22 exclusively fills only the previously milled material of the groove 20 and replaces it completely (except for the outside radius), i. H. it does not extend in front of the front surface 18 or the inner surface

16 on wood or metal.

The entire process can be carried out in the so-called continuous process. This means that the process steps take place continuously one after the other. It is also conceivable that the parts 24, 26 that are connected to one another at right angles are only shortened to the intended length at the end of the process or are intentionally made to be too long in order to split them into several individual door frame components in the longitudinal direction

split up.

Claims (17)

- 16 - Claims 1. Method for producing a door frame (10) for a building door with at least one inner surface (16) pointing into a door opening (14) and at least one front surface (18) which forms a visible end face of the door frame (10), the at least one Inner surface (16) and the at least one front surface (18) each define a plane and the planes at least one Have cutting lines, characterized by the following process steps: a) producing a v-shaped groove (20) in the region of the straight line, the v-shaped groove (20) extending along the straight line extends; b) coating the groove surface defining the v-shaped groove (20) with an adhesive and/or coating a plastic strip (22) with an adhesive; c) inserting a/the plastic strip (22) into the V-shaped groove (20); and d) Milling over the front surface (18) and the inner surface (16) of the plastic strip (22) glued into the V-shaped groove (20). 2. The method according to claim 1, characterized in that before step a) a miter cut (34) or a v-shaped groove (20) is made in a plate (31), whereby the plate (31) is cut into an inner part (24 ) that includes the inner surface (16) and a front part (26) that includes the front surface (18), the inner side part (24) and the front part (26) being divided along the axis formed by the miter cut (34 ) or the V-shaped groove (20) newly created surfaces to form an edge (27) perpendicular to each other get connected. 3. The method according to claim 1, characterized in that the inner surface (16) is formed by an inner part (24) and the front surface (18) by a front part (26) or that the inner surface (16) partially by an inside part (24) and partially by a "17 - front part (26) and the front surface (18) is formed by the front part (26) or that the inner surface (16) is formed by an inner part (24) and the front surface (18) is formed in sections by the inner part (24) and a front part (26) is formed in sections, with both parts (24, 26) or one of the parts (24, 26) forming an edge (27) of the door frame (10) which lies in the straight line of intersection. 4. The method according to claim 1, characterized in that the door frame (10) has at least one outer surface (29) pointing in the opposite direction to the inner surface (16), which defines a plane and whose plane has at least one intersection line with the plane of the at least one front surface (18 ), wherein steps a) to d) are also carried out along this line of intersection become. 5. The method according to claim 2, 3 or 4, characterized in that the v-shaped groove (20) in step a) by milling in the inside part (24) and/or the front part (26) is produced along the edge (27). 6. The method according to claim 3, characterized in that the V-shaped groove (20) is formed in step a) by a lateral offset of the inside and the front part (24, 26), the end face of the parts (24, 26 ) each form one side of the v-shaped groove (20). 7. The method according to any one of the preceding claims, characterized in that the adhesive used in step b) is an adhesive tape or is a hot melt adhesive. 8. The method according to any one of the preceding claims, characterized in that the plastic strip (22) in step c) exclusively by Gluing is attached and there is no positive connection. 9. The method according to any one of the preceding claims, characterized in that the plastic strip (22) in steps b) and / or c) is unwound from a roll (40). 10. The method according to any one of the preceding claims, characterized in that the door frame (10) consists of at least one veneered panel will be produced. -18- 11. The method according to any one of the preceding claims, characterized in that the plastic strip (22) after step c) and before step d) is pressed with pressure into the V-shaped groove (20) by means of a pressure roller (42). 12. The method according to any one of the preceding claims, characterized in that the plastic strip (22) is a rectangular Has cross-sectional profile. 13. The method according to claim 12, characterized in that the edge length of the rectangular cross-sectional profile of the plastic strip (22) is 2 mm x 2 mm. 14. The method according to any one of the preceding claims, characterized in that the overmilling in step d) takes place by means of a rounding cutter (44), in particular using a tool-side spacer (46), which rests against the door frame (10). 15. The method according to any one of the preceding claims, characterized in that steps a) to d) are carried out in a continuous process become. 16. The method according to any one of the preceding claims, characterized in that the plastic strip (22) is milled over before being introduced into the v-shaped groove (20) on those sides of the plastic strip (22) which rests against the groove surfaces defining the groove (20). 17. Door frame produced by a method according to one of the preceding claims, with an inside and a front-side part (24, 26) made of a veneered board, which are connected to one another in 45° to the outside running surfaces, the edge (27) produced thereby having the v-shaped groove (20).