EP3791966A1 - Painting apparatus and method for painting pins - Google Patents

Abstract

The invention relates to a painting device (1a, 1b, 1c) for painting pens (5), in particular wood-cased pens (5) for writing, painting and / or cosmetic purposes with a casing made of a wood substitute material, with at least one first (2a ) and a second paint container (2b), the at least two paint containers (2a, 2b) each having an inlet and outlet opening through which the pen (5) enters and exits, the at least two paint containers (2a, 2b) one behind the other are arranged to apply paint to a surface (8a, 8b) of the pen (5) at least twice in a painting process. The invention also relates to a method for painting pens (5).

Description

The invention relates to a painting device and a method for painting pens, in particular wood-cased pens or a casing made of a wood substitute material, a so-called wood-plastic compound, having pens for writing, painting and / or cosmetic purposes.

Wood-cased pencils or pencils with a casing made of a wood substitute material, in particular pencils and / or colored pencils, but also cosmetic pencils, are usually lacquered in a push-through process, a pencil being pushed through a lacquer container filled with lacquer. Flowable, highly viscous lacquers are used here, which usually show thixotropic behavior.

In rapid succession, the pens are pushed through the paint container in a lower area. Thick layers of lacquer on the surface of the pen are not possible in the present case, since after the pen has been pierced through the lacquer container, the lacquer applied to the surface of the pen has to dry within a few seconds to such an extent that the pencils do not stick. For this purpose, the pens are usually applied to drying belts, so-called polishing belts, which are several meters long. However, the relatively thin paint films do not provide complete coverage the wood structure, which means that the lacquer application and the subsequent drying on the drying belt must be repeated several times. Usually between three and seven times colored lacquer is applied. Finally, the transparent clearcoat is applied in one to three painting processes.

The invention is therefore based on the object of specifying a device and a method for painting pens which at least largely overcomes the aforementioned disadvantages, in particular to improve the quality of the paint surface and reduce the number of painting processes.

The first-mentioned object is achieved by a painting device having the features according to claim 1. Advantageous configurations and developments are specified in the respective dependent claims.

The painting device according to the invention for painting pens, in particular wood-cased pens or pens with a casing made of a wood substitute material for writing, painting and / or cosmetic purposes, comprises at least a first and a second paint container, the at least two paint containers each having an inlet and outlet opening , through which the pen enters and exits the paint container, the at least two paint containers being arranged one behind the other in order to apply paint to a surface of the pen at least twice in a painting process.

An advantage of the painting device according to the invention is that the at least two painting steps in only one painting process, i.e. without the pen lying on a drying belt between the painting steps, allows unevenness on the pen surface to be covered better in a first painting process. As a result, on the one hand, it is possible to improve the quality of the painting and, in addition, to reduce the number of painting processes compared to conventional painting devices.

The phrase “arranged one behind the other” is to be understood as meaning that the inlet and outlet openings of the paint containers lie in the penetration direction along an axis so that a pen can be moved in a straight line through all paint containers. For example, the painting device has a common platform on which the paint containers are arranged one behind the other.

Furthermore, it can be provided that the painting device comprises at least one third paint container, the third paint container being arranged behind the first two paint containers. Furthermore, a fourth, fifth, sixth or further paint container can be provided, which are each arranged one behind the other. This further improves the result of a painting process.

At least one stripping element is preferably arranged at the outlet opening of the first and / or the second and / or the third and / or a further paint container, which has a through opening through which the pin is pushed. This stripping element is used in particular to wipe off excess paint, so that only a thin, quick-drying paint film remains on the surface of the pen. Furthermore, the respective paint container is sealed off from the pen via the stripping element. In addition, surfaces can be smoothed and / or polished with it.

In order to wipe off excess paint evenly from the entire surface of the pen, the wiping element can in the simplest case have an annular through opening. Preferably, however, the at least one wiper element has on its inner circumferential surface radially inwardly protruding wiper regions for at least partial wiping of paint from the surface of the pin and recesses delimiting the wiper regions from one another in the circumferential direction. The stripping areas extend in parallel to the direction of penetration and are flanked by the recesses or depressions that also run in the direction of penetration. On the one hand, the protruding wiping areas allow excess lacquer to be removed only from partial areas of the surface of the pen. On the other hand, such a geometric design of the wiping elements also makes it possible to completely wipe the paint off the surface at defined points, which can result in striped pencils, for example.

According to a further development it is provided that a wiper element arranged at the outlet opening of the first paint container and / or a wiper element arranged at the outlet opening of the second paint container and / or a wiper element arranged at the outlet opening of the third paint container and / or a wiper element arranged at the outlet opening of the further Paint container arranged stripping element from one another, in particular in such a way that the wiping areas of the wiping elements have a different extent and / or position in relation to the paint container in relation to the circumferential direction and / or in the radial direction and / or that the inner peripheral surfaces of the stripping areas have a different curvature exhibit. In particular, there is at least one stripping element with inwardly protruding stripping areas for stripping paint from a first surface area, in particular the surfaces of the pen, and at least one stripping element with inwardly protruding stripping areas for stripping paint from a second surface area, in particular from the edges of the pen , educated. For this purpose, the wiping areas have an extension that is complementary to the surfaces or edges of the pin. The geometry of the stripping areas can be used to set how much and at which points paint is to be stripped from the surface of the pen.

The at least one stripping element preferably contains an elastic material, for example rubber. In other words, the at least one stripping element consists at least partially of an elastic material. By Compression of the stripping elements in the assembled state in the painting device can also set how much paint is to be stripped from the surface of the pen.

A further development of the invention provides that after the first paint container and / or after the second paint container and / or after the third paint container and / or after a further paint container, a drying device, which is in particular ring-shaped, to the paint on the surface of the pen to be able to dry evenly from all sides, for example an infrared heater and / or hot air nozzles, is arranged. This enables the initially applied paint film to dry slightly in order to be able to apply a larger amount of paint in the immediately following painting step within the same painting process. This enables a higher number of pens to be pierced by the painting device or an increase in the amount of paint on the pen per paint container passed through.

The paint containers are preferably filled with water-based paint or a paint based on organic solvents. In the case of water-based paint, water acts as the main solvent; in the case of paints based on organic solvents, the solvents used are essentially ketones such as acetone, but also alcohols and / or esters. The paint containers of the painting device can each contain the same paint or different paints. Thus, for example, there can be water-based paint in the first and second paint container and a paint based on organic solvents in the third paint container.

1. a) Hindurchschieben eines Stiftes durch einen ersten Lackbehälter der Lackiervorrichtung zur Applikation eines ersten Lackes,
2. b) Teilweises oder vollständiges Abstreifen des ersten Lackes an der Austrittsöffnung des ersten Lackbehälters,
3. c) Hindurchschieben des Stiftes durch einen zweiten, hinter dem ersten Lackbehälter angeordneten Lackbehälter der Lackiervorrichtung zur Applikation eines zweiten Lackes,
4. d) Teilweises oder vollständiges Abstreifen des zweiten Lackes an der Austrittsöffnung des zweiten Lackbehälters,
5. e) Trocknen des Stiftes auf einem Trocknungsband, insbesondere bei erhöhter Temperatur.

The second-mentioned object is achieved with a method having the features according to claim 9. In the method according to the invention for painting pencils, in particular with a painting device according to the preceding description, a painting process comprises at least the following steps:

1. a) Pushing a pen through a first paint container of the painting device to apply a first paint,
2. b) Partial or complete stripping of the first paint at the outlet opening of the first paint container,
3. c) Pushing the pen through a second paint container of the painting device, which is arranged behind the first paint container, for the application of a second paint,
4. d) Partial or complete stripping of the second paint at the outlet opening of the second paint container,
5. e) drying the pencil on a drying belt, in particular at an elevated temperature.

The first and second lacquer can be the same or different.

The method thus comprises a painting process with at least a first painting step (step a) and b)) and a second painting step (step c) and d)).

According to a further development, the painting process comprises at least a third or a further painting step, in which the pen is pushed through a third paint container or a further paint container for the application of a third or further paint and the third or further paint is partially or completely at the outlet opening of the third or further paint Paint container is stripped.

The partial or complete stripping of paint is preferably carried out by a stripping element arranged at the exit opening of the first paint container and / or at the exit opening of the second paint container and / or at the exit opening of the third paint container and / or at the exit opening of a further paint container.

The partial or complete stripping of paint at the outlet openings of the paint container is preferably carried out by means of differently designed stripping elements, in particular by means of a stripping element for wiping off Lacquer from a first surface area of the pen and a stripping element for stripping lacquer from a second surface area of the pen. The first and the second surface area of the pen can in particular correspond to the surfaces and edges of the pen. For this purpose, the wiping elements have wiping areas protruding radially inward and extending in the circumferential direction, which differ in particular in relation to the circumferential direction and / or in the radial direction in extension and / or position in relation to the paint container and / or in the curvature of the inner circumferential surfaces, and these flanking recesses. A special geometric design of the stripping elements also makes it possible, for example, to produce striped pins. For this purpose, the wiping elements have, in particular, wiping areas which protrude radially further inwards in order to completely wipe the lacquer from the surface of the pen at these points.

A further development of the method provides that after the paint has been partially or completely stripped off at the outlet opening of the first paint container and / or at the outlet opening of the second paint container and / or at the outlet opening of the third paint container and / or at the outlet opening of a further paint container Intermediate drying takes place in order to slightly dry the initially applied paint film. As a result, a larger amount of paint can be applied in the painting step that takes place immediately afterwards within the same painting process. The intermediate drying takes place, for example, with a ring-shaped drying device, for example with an infrared heater and / or hot air nozzles.

It can be provided that steps a) to e) of the method according to the invention are repeated at least once.

FIG 1

eine schematische Darstellung einer perspektivischen Ansicht einer Lackiervorrichtung gemäß einer ersten Ausführungsform,

FIG 2

eine schematische Darstellung der Frontalansicht einer Lackiervorrichtung gemäß der ersten Ausführungsform gemäß FIG 1,

FIG 3

eine schematische Darstellung der Frontalansicht einer Lackiervorrichtung gemäß einer zweiten Ausführungsform,

FIG 4

eine schematische Darstellung der Frontalansicht einer Lackiervorrichtung gemäß einer dritten Ausführungsform,

FIG 5A

eine schematische Darstellung der Frontalansicht eines Abstreifelements gemäß einer ersten Ausführungsform,

FIG 5B

eine schematische Darstellung einer perspektivischen Ansicht des Abstreifelementes gemäß FIG 5A,

FIG 6A

eine schematische Darstellung der Frontalansicht eines Abstreifelements gemäß einer zweiten Ausführungsform,

FIG 6B

eine schematische Darstellung einer perspektivischen Ansicht des Abstreifelementes gemäß FIG 6A,

FIG 7

eine schematische Darstellung einer perspektivischen Ansicht eines Stiftes.

Einander entsprechende Teile und Komponenten sind auch über die verschiedenen Figuren und Ausführungsbeispiele hinweg jeweils mit den gleichen Bezugszeichen bezeichnet.The painting device according to the invention and the method according to the invention are explained in more detail below with regard to further features and advantages on the basis of the description of exemplary embodiments and with reference to the accompanying schematic drawings. Show it

FIG 1

a schematic representation of a perspective view of a painting device according to a first embodiment,

FIG 2

a schematic representation of the front view of a painting device according to the first embodiment according to FIG FIG 1 ,

FIG 3

a schematic representation of the front view of a painting device according to a second embodiment,

FIG 4

a schematic representation of the front view of a painting device according to a third embodiment,

FIG 5A

a schematic representation of the front view of a stripping element according to a first embodiment,

FIG 5B

a schematic representation of a perspective view of the stripping element according to FIG 5A ,

FIG 6A

a schematic representation of the front view of a stripping element according to a second embodiment,

FIG 6B

a schematic representation of a perspective view of the stripping element according to FIG 6A ,

FIG 7

a schematic representation of a perspective view of a pen.

Parts and components that correspond to one another are denoted by the same reference symbols in each case throughout the various figures and exemplary embodiments.

FIG. 1 and FIG. 2 show a painting device 1 a with a first paint container 2a and a second paint container 2b, which are arranged on a common platform 3. Both behind the first paint container 2a and behind the second paint container 2b there is in each case a stripping element 4a, 4b that encompasses the outlet opening of the paint container 2a, 2b. The stripping elements 4a, 4b described in more detail below differ in the extent and curvature of their stripping areas 7a, 7b and are shown in FIG FIG. 5A and 5B as in FIG. 6A and 6B shown in more detail.

A pen 5 to be painted, which is in FIG. 7th is shown, is first pushed through the first paint container 2a in order to apply a first paint. Excess paint is wiped off the surface 8a of the pen 5 with the aid of the stripping element 4a arranged at the outlet opening of the first paint container 2a. Then the pen 5 is pushed through the second paint container 2b, with the aid of the stripping element 4b arranged at the outlet opening of the second paint container 2b, excess paint being wiped off the surface 8b of the pen 5. The stripping elements 4a, 4b differ for this in the extent and curvature of their stripping areas 7a, 7b as in FIG FIG. 5A and 5B as in FIG. 6A and 6B shown in more detail. The pen 5 then dries on a drying belt, which is not explicitly shown. The procedure described is repeated at least once.

In FIG. 3 a second embodiment of a painting device 1b is shown, in which in addition to the in FIG. 1 and 2 illustrated first embodiment between the first paint container 2a and the second paint container 2b a drying device 6 is arranged to the in the first paint container 2a to slightly dry the paint applied before the pin 5 is pushed through the second paint container 2b. With the painting device 1b, as an additional step to the method described above, intermediate drying takes place by means of the drying device 6 between the two painting steps within a painting process. In the present case, the drying device 6 is designed in the shape of a ring, so that the pin 5 can be pushed through it in order to dry the paint film on the surface of the pin 5 evenly. Furthermore, the drying device 6 can for example be arranged or fastened on the common platform 3, which is shown in FIG FIG 3 is shown in dashed lines.

FIG. 4th shows a third embodiment of a painting device 1c, in which a third paint container 2c is arranged behind the second paint container 2b. In addition, the embodiment shown comprises two drying devices 6, which are also ring-shaped and which are arranged between the first paint container 2a and the second paint container 2b and between the second paint container 2b and the third paint container 2c. With a painting device according to FIG. 4th After pushing through the second paint container 2b, the pen 5 is additionally pushed through a third paint container 2c, whereby the applied paint is also partially or completely wiped off the surface 8a, 8b of the pen 5 by means of a stripping element 4c arranged at the outlet opening of the third paint container 2c becomes. After the pin 5 has been pushed through the first paint container 2a and after it has been pushed through the second paint container 2b, intermediate drying takes place by means of a drying device 6. Also according to FIG 4 the drying device 6 is exemplarily arranged on the common platform 3, which is also shown in dashed lines.

In the FIG. 5A and 5B the stripping element 4a is shown, which on its inner circumferential surface in a radial direction R inwardly protruding and extending in the circumferential direction U stripping areas 7a and recesses 9a, which delimit the stripping areas 7a from each other in the circumferential direction U, having. The stripping areas 7a are shaped or have a curvature complementary to the surface area 8a of the pin 5, so that the stripping of paint from the surface areas 8a of the in FIG FIG. 7th shown pin 5, which correspond to the side surfaces of the pin 5, is possible.

The FIG. 6A and 6B show the stripping element 4b, which likewise has stripping regions 7b protruding inward in a radial direction R and extending in the circumferential direction U and has recesses 9b flanking these on its inner circumferential surface. Here, the stripping areas 7b for stripping the surface areas 8b of the in FIG. 7th The pin 5 shown here, which here correspond to the edge surfaces of the pin 5, or have a curvature complementary to the surface area 8b of the pin 5.

List of reference symbols

1a

Painting device

1b

Painting device

1c

Painting device

2a

first paint container

2 B

second paint container

2c

third paint container

3

platform

4a

Wiper element

4b

Wiper element

4c

Wiper element

5

pen

6th

Drying device

7a

Stripping area

7b

Stripping area

8a

Surface area

8b

Surface area

9a

Recess

9b

Recess

R.

Radial direction

U

Circumferential direction

Claims (14)

Painting device (1a, 1b, 1c) for painting pens (5), in particular wood-cased pens (5) for writing, painting and / or cosmetic purposes with a casing made of a wood substitute material, with at least a first (2a) and a second Paint container (2b), the at least two paint containers (2a, 2b) each having an inlet and outlet opening through which the pen (5) enters and exits, the at least two paint containers (2a, 2b) being arranged one behind the other to to apply paint to a surface (8a, 8b) of the pin (5) at least twice in one painting process. Painting device (1a, 1b, 1c) according to claim 1, comprising at least one third paint container (2c), the third paint container (2c) being arranged behind the first two paint containers (2a, 2b). Painting device (1a, 1b, 1c) according to one of the preceding claims, wherein at the outlet opening of the first (2a) and / or the second (2b) and / or the third (2c) and / or a further paint container at least one stripping element (4a , 4b, 4c) is arranged, which has a through opening through which the pin (5) is pushed. Painting device (1a, 1b, 1c) according to claim 3, wherein the at least one stripping element (4a, 4b, 4c) on its inner circumferential surface radially inwardly projecting stripping areas (7a, 7b) for at least partial stripping of paint from the surface (8a, 8b) of the pin (5) and the stripping regions (7a, 7b) in the circumferential direction (U) has recesses (9a, 9b) that delimit one another. Painting device (1a, 1b, 1c) according to one of claims 3 or 4, wherein a wiper element (4a) arranged at the outlet opening of the first paint container (2a) and / or a wiper element (4b) arranged at the outlet opening of the second paint container (2b) ) and / or a wiper element (4c) arranged at the outlet opening of the third paint container (2c) and / or a wiper element arranged at the outlet opening of the further paint container differ from one another, in particular in such a way that the wiping areas (7a, 7b) of the wiping elements ( 4a, 4b, 4c) have a different extent in relation to the circumferential direction (U) and / or in the radial direction (R) and / or that the inner circumferential surfaces of the stripping areas (7a, 7b) have a different curvature. Painting device (1a, 1b, 1c) according to one of Claims 3 to 5, the at least one stripping element (4a, 4b, 4c) containing an elastic material. Painting device (1a, 1b, 1c) according to one of the preceding claims, wherein after the first paint container (2a) and / or after the second paint container (2b) and / or after the third paint container (2c) and / or after a further paint container a Drying device (6), which is in particular annular, is arranged. Painting device (1a, 1b, 1c) according to one of the preceding claims, wherein the paint containers (2a, 2b, 2c) are filled with water-based paint or a paint based on organic solvents. Method for painting pens (5), in particular with a painting device (1a, 1b, 1c) according to one of the preceding claims, wherein a painting process comprises at least the following steps: a) pushing a pen (5) through a first paint container (2a) to apply a first paint, b) Partial or complete stripping of the first paint at the outlet opening of the first paint container (2a), c) pushing the pin (5) through a second paint container (2b) arranged behind the first paint container (2a) for the application of a second paint, d) Partial or complete stripping of the second paint at the outlet opening of the second paint container (2b), e) drying the pin (5) on a drying belt, in particular at an elevated temperature. Method according to claim 9, wherein the painting process comprises at least one third painting step, in which the pen (5) is pushed through a third paint container (2c) or a further paint container for the application of a third or further paint and the third or further paint is partially or completely pushed on the outlet opening of the third (2c) or further paint container is stripped off. Method according to claim 9 or 10, wherein the partial or complete stripping of paint by means of an at the outlet opening of the first paint container (2a) and / or at the outlet opening of the second paint container (2b) and / or at the outlet opening of the third paint container (2c) and / or stripping element (4a, 4b, 4c) arranged at the outlet opening of a further paint container. Method according to one of claims 9 to 11, wherein the partial or complete stripping of paint at the outlet openings of the paint containers (2a, 2b, 2c) is carried out by differently designed stripping elements (4a, 4b, 4c), in particular by a stripping element (4a, 4b, 4c) for stripping paint from a first surface area (8a) of the pen (5) and a stripping element (4a, 4b, 4c) for stripping paint from a second surface area (8b) of the pen (5). Method according to one of claims 9 to 12, wherein after the partial or complete stripping of the paint at the outlet opening of the first paint container (2a) and / or at the outlet opening of the second paint container (2b) and / or at the outlet opening of the third paint container (2c ) and / or intermediate drying takes place at the outlet opening of a further paint container. The method according to any one of claims 9 to 13, wherein steps a) to e) are repeated at least once.

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