DE102018108920A1 - A method of processing a wood body and a wood body processed by the method - Google Patents

Abstract

A method of processing a wood body (1, 1a, 1b) comprising naturally grown wood, comprising the following steps:
Softening of the wood body (1, 1a, 1b) and
- Pressing the wood body (1, 1a, 1b) in at least one spatial direction (2) with simultaneous introduction of a pattern (3, 3a, 3b), a label or numbering in and / or on a surface (4) of the wood body (1 , 1a, 1b) solves the problem of providing a method by which a wood body of natural wood can be deformed as efficiently as possible and provided with haptic features on its surface.

Description

The invention relates to a method for processing a wooden body and a wooden body or handle of a knife or cutlery part, which was manufactured by the method.

Naturally grown woods are visually appealing and coveted as raw materials for a variety of elaborate products. However, the material natural wood is often not easy to work with, in particular, natural wood, when cured, is not easy to bend or deform.

Therefore, methods have been developed for softening natural wood to make it easier to bend or shape it to a desired shape.

Against this background is from the DE 102 24 721 B4 The use of microwaves has become known in order to first heat a wood body and then to compress it at pressures of 5 to 30 MPa.

In practice, however, there is often the need not only to change a wooden body with regard to its geometric shape, but also to provide it with other haptic features on at least one of its surfaces, which are necessary for its intended use.

When the wood re-hardens after softening, the provision of such haptic features is often difficult. However, re-softening is often undesirable because it would be an uneconomic process.

The invention is therefore based on the object to provide a method by which a wooden body of natural wood can be deformed as efficiently as possible and provided with haptic features on its surface.

The present invention achieves the aforementioned object by the features of the claim 1 ,

According to the invention it has been recognized that a wooden body made of natural wood must first be softened in a suitable manner, but then in a step both a compression of the wood body as well as a simultaneous impression and introduction of a pattern, a label or numbering must be made to this quickly and work efficiently.

For the purposes of this description, a pattern is understood to mean a profile with elevations and depressions. A pattern is a profile that is introduced into the surface. As a pattern, fish skin patterns, corrugations, grooves, waves or the like are conceivable.

The crimping step could be accomplished by at least one die or roller having a negative mold of the pattern to be inserted, the lettering or the numbering. To introduce the haptic features a stamp is used, which not only serves to compress the wood body, but also has a negative surface, which brings the pattern, the label or the numbering in the surface of the wood body. The still suitably soft wood body is deformed, for example, in terms of its thickness or length and at the same time provided with haptic features. The use of a roll allows a continuous process.

The wood body could be pressed simultaneously or with a time delay to the step of pressing in at least one other spatial direction. Again, a stamp could be used, which is moved orthogonal to the above stamp. As a result, the wood body can be compressed in several spatial directions at the same time. It is such a shortening or compression of a wooden body possible. A pressure across the grain of the wood squeezes and dilutes the wood body. A pressure along the fiber direction can lead to shortening or compression of the wood body.

The wood body could be deformed by pressing from a starting shape in an end shape, wherein the geometry of the initial shape of the geometry of the final shape differs, different areas of the wood body are compressed to different degrees and wherein the wood body has different thicknesses at different areas. As a result, a wooden body may have a different height profile, for example mountains and valleys, the surface provided with the pattern, the inscription or numbering following the course of the mountains and valleys. It is essential, however, that the aforementioned pattern, the lettering or numbering is introduced in addition to a successful deformation, such as bending, thinning or compression of the wood body in the pressing direction in the surface.

The wood body could be bent when pressing or inserting the pattern, the inscription or the numbering. For this purpose, a curved stamp can be used. So can the Wooden body extended on one side and compressed on the opposite side.

The softening could take place in an autoclave in a pressure range of 0.1 to 0.3 bar and in a temperature range of 65 ° C to 120 ° C. This type of softening is usually carried out the longer the thicker a wood body. At a thickness of about 5 mm, an autoclaving time of 5 minutes is selected. The softening could be done through the use of microwaves. As a result, a rapid softening of the wood body is possible.

The wooden body could be infiltrated with a synthetic resin. Alternatively or additionally, the surface could be coated with a plastic. Both steps are performed after the pattern, label, or numbering is incorporated. The synthetic resin fills in the remaining pores and cavities of the wood body, so that the wooden body becomes sluggish against changes. The wood does not work anymore after infiltration.

The surface could be coated with a plastic after the pattern, inscription or numbering is incorporated. This conserves the pattern, label, or numbering. The wood of the surface essentially does not work anymore. The penetration of moisture into the wood body is avoided.

Against this background, it is also conceivable to work the wooden body with water glass.

Two wooden bodies could be positioned after softening on opposite sides of a knife hinge or a fishing rod of a cutlery and only then the step of pressing both wooden bodies and the simultaneous introduction of the pattern, the lettering or the numbering in both wooden body could be done to a handle of a Knife or a piece of cutlery. Thus, a knife or a piece of cutlery, such as a fork or a spoon, can be made, the handles are made of wood almost finished.

Each wood body could be inserted before pressing each in a stamp with a recording, each recording has a negative shape of the introduced into the respective wooden body pattern, the label or the numbering, the stamps face each other and wherein at least one stamp relative to the other is moved to perform the step of pressing and inserting. The recordings ensure that the wooden body does not slip. The recordings are advantageously designed as Kuhlen or depressions.

When the stamps are brought together, a substantially closed shape is created. Each stamp can be cooled after pressing in order to carry out the process faster, namely to be able to edit as quickly as possible further wood body.

A wood body comprising naturally grown wood could be made by a process of the kind described herein. In places of the wood body, which are compressed by pressing, a pattern, a label or a numbering is introduced into the wood.

The wood body may be part of a car interior or car outer panel, part of a piece of furniture or part of a household appliance.

Preferably, however, a handle of a knife or cutlery is made by a method of the kind described above. Thus, a high-quality and visually appealing handle made of natural wood can be made.

The handle of the cutlery is provided with a pattern, so a profile, so that it is easier to grasp and the user does not slip off the handle easily. The piece of cutlery is preferably designed as a knife.

With a handle, two wooden bodies could be provided as handles of a knife. A knife can be provided in the manufacture of the handle with two wooden bodies, which form the handles. The handles are placed on both sides of a knife edge and then pressed and at the same time provided with a pattern, a label or a numbering. As a result, the production of a knife is much easier.

The wooden body could be used as a fitting for doors, drawers or similar products.

The wood body could be used as part of a toothbrush, writing tool or glasses.

• 1 eine schematische Darstellung eines Holzkörpers und eines Stempels, wobei der Holzkörper beim Verpressen durch den Stempel eine Dickenänderung erfahren hat und wobei der Stempel beim Verpressen zugleich ein Muster in die Oberfläche des Holzkörpers eingebracht hat,
• 2 eine schematische Darstellung eines Holzkörpers und eines Stempels, wobei der Holzkörper durch den Stempel gebogen wurde, und
• 3 eine schematische Darstellung eines Verfahrens zur Fertigung des Griffs eines Messer, wobei als Griffschalen Holzkörper verwendet werden, die zugleich verpresst und mit einem Muster versehen werden.

In the drawing show

• 1 a schematic representation of a wood body and a stamp, wherein the wood body has undergone a change in thickness during pressing by the stamp and wherein the stamp at the same time has introduced a pattern in the surface of the wood body during pressing,
• 2 a schematic representation of a wood body and a stamp, wherein the Wooden body was bent by the stamp, and
• 3 a schematic representation of a method for manufacturing the handle of a knife, being used as handles wooden body, which are also pressed and provided with a pattern.

1 shows a schematic view of a method for processing a wood body 1 that has naturally grown wood. The wooden body 1 is made of oak wood.

The step of softening the wood body 1 takes place in an autoclave not shown under vapor pressure, steam being used. The vapor pressure is approx. 0.18 bar. The temperature is about 104 ° C. Cell walls of natural wood of a wooden body 1 become soft and malleable.

Instead of water vapor, a gas or gas mixture could be used which comprises a gaseous solvent.

Softening of the wood may also be accomplished by other methods, for example by the use of a hot bath of sodium hydroxide and sodium sulphite, into which the wood body 1 could be dipped.

A softening of the wood can also be done by other methods, for example by the use of a bath which has a solvent, in which the wood body 1 could be dipped. Preferably, an alcohol is used as the solvent

After softening the wood body 1 this is pressed by pressure across the grain of the wood and thereby diluted. A pressure along the fiber direction can shorten or compress the wood body 1 to lead.

1 shows that the pressing of the wooden body 1 in at least one spatial direction 2 while simultaneously introducing a pattern 3 in a surface 4 of the wood body 1 he follows.

The pressing step is carried out by at least one stamp 5 , which is a negative form 6 of the pattern to be inserted 3 having.

The wooden body 1 is made by pressing from a starting shape 7 starting in a final shape 8th deformed, with the geometry of the initial shape 7 from the geometry of the final shape 8th different, with different areas 9 . 10 of the wood body 1 be compressed to different degrees and the wood body 1 in different areas 9 . 10 has different thicknesses. The initial form 7 is a cuboid.

The wooden body 1 can be infiltrated with a synthetic resin. The surface 4 Can be coated with a plastic after the pattern 3 is introduced.

2 shows in a schematic view that a wooden body 1a when pressing or applying a pattern 3a is bent or was.

3 shows that two wooden body 1b after softening on opposite sides of a knife hinge 11 be positioned and then only the step of pressing both wooden body 1b and the simultaneous introduction of the pattern 3b in both wooden bodies 1b done to a handle of a knife 12 to manufacture. The position of the pattern 3b is indicated by the arrow, however, is the pattern 3b not yet introduced.

Every wooden body 1b is in each case a stamp before pressing 5b with a recording 13 inserted, each recording 13 a negative form 6b in the respective wooden body 1b pattern to be introduced 3b has, wherein the stamp 5b opposite each other and wherein at least one stamp 5b is moved relative to the other to perform the step of pressing and inserting.

The wooden body 1b can be pressed or compressed simultaneously or with a time delay to the step of pressing in at least one further spatial direction. This is another stamp 14 provided, which is orthogonal to the pressing direction of the other two punches 1b is movable. By the further stamp 14 can the wooden body 1b against a goiter of the knife 12 be pressed between the blade and knife hinge 11 can be arranged. The pressing direction of the stamp 5b is oriented transversely or substantially orthogonal to the grain of the wood. The pressing direction corresponds to the spatial direction 2 ,

The 1 to 3 each show a wooden body 1 . 1a . 1b comprising naturally grown wood produced by a method of the kind described herein. 3 even shows two wooden bodies 1b , which handles a knife 12 form.

3 shows concretely a handle of a knife 12 manufactured by a method of the kind described above, wherein the handles of the handle through the wooden body 1b are formed.

LIST OF REFERENCE NUMBERS

1, 1a, 1b

wooden body

2

spatial direction

3, 3a, 3b

template

4

surface

5, 5a, 5b

stamp

6, 6a, 6b

negative form

7

original shape

8th

final form

9

Range of 1

10

Range of 1

11

knife Angel

12

knife

13

Inclusion of 5b

14

another stamp

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10224721 B4 [0004]

Claims (10)

A method of processing a wood body (1, 1a, 1b) comprising naturally grown wood, comprising the following steps: Softening of the wood body (1, 1a, 1b) and - Pressing the wood body (1, 1a, 1b) in at least one spatial direction (2) with simultaneous introduction of a pattern (3, 3a, 3b), a label or numbering in and / or on a surface (4) of the wood body (1 , 1a, 1b). Method according to Claim 1 , characterized in that the step of pressing takes place by at least one punch (5, 5a, 5b) or a roller, which or a negative mold (6, 6a, 6b) of the pattern to be introduced (3, 3a, 3b) Lettering or numbering. Method according to Claim 1 or 2 , characterized in that the wooden body (1, 1a, 1b) is pressed simultaneously or with a time delay to the step of pressing in at least one further spatial direction. Method according to one of the preceding claims, characterized in that the wooden body (1, 1a, 1b) is deformed by pressing from an initial shape (7) into a final shape (8), wherein the geometry of the starting shape (7) differs from that of FIG Geometry of the final shape (8), wherein different areas (9, 10) of the wood body (1, 1a, 1b) are compressed to different degrees and wherein the wood body (1, 1a, 1b) at different areas (9, 10) have different thicknesses having. Method according to one of the preceding claims, characterized in that the wooden body (1, 1a, 1b) is bent during the pressing or introduction of the pattern (3, 3a, 3b), the inscription or the numbering. Method according to one of the preceding claims, characterized in that the softening takes place in an autoclave in a pressure range of 0.1 to 0.3 bar and in a temperature range of 65 ° C to 120 ° C and / or that the softening through the use of microwaves. Method according to one of the preceding claims, characterized in that the wooden body (1, 1a, 1b) is infiltrated with a synthetic resin and / or that the surface (4) is coated with a plastic after the pattern (3, 3a, 3b) , the caption or the numbering is introduced. Method according to one of the preceding claims, characterized in that two wood bodies (1b) after softening are positioned on opposite sides of a knife hinge (11) or a fishing rod of a cutlery piece and then only the step of pressing both wooden bodies (1b) and the simultaneous Inserting the pattern (3b), the lettering or the numbering in both wooden body (1b) takes place to produce a handle of a knife (12) or a piece of cutlery. Method according to one of the preceding claims, characterized in that each wood body (1b) is inserted into a respective punch (5b) with a receptacle (13) before being pressed, each receptacle (13) forming a negative mold (6b) in the respective one Wooden body (1b) to be introduced with lettering or numbering, the punches (5b) facing each other, and at least one punch (5b) being moved relative to the other to carry out the pressing and inserting step. A wood body (1, 1a, 1b) comprising naturally grown wood produced by a method according to any of the preceding claims or handle of a knife (12) or cutlery piece made by a method according to Claim 8 or 9 ,

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