CN109562411B - Method for producing a coated plastic panel, plastic panel and household appliance comprising the plastic panel - Google Patents
Method for producing a coated plastic panel, plastic panel and household appliance comprising the plastic panel Download PDFInfo
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- CN109562411B CN109562411B CN201780047684.2A CN201780047684A CN109562411B CN 109562411 B CN109562411 B CN 109562411B CN 201780047684 A CN201780047684 A CN 201780047684A CN 109562411 B CN109562411 B CN 109562411B
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- lacquer layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
- B44C1/22—Removing surface-material, e.g. by engraving, by etching
- B44C1/228—Removing surface-material, e.g. by engraving, by etching by laser radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C3/00—Processes, not specifically provided for elsewhere, for producing ornamental structures
- B44C3/005—Removing selectively parts of at least the upper layer of a multi-layer article
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/28—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
- F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Optics & Photonics (AREA)
- Toxicology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a method for producing a coated plastic panel, comprising the following steps: (a) providing a plastic body (2) made of an at least partially transparent plastic; (b) applying a first layer of a light-blocking lacquer (3) to a surface (4) of the plastic body (2); (c) applying a second paint layer (5) on the light-blocking first paint layer (3) of step (b), wherein the second paint layer (5) is light-transmitting than the first paint layer (3); and (d) irradiating the coated partial surface T of the surface (4) by means of infrared laser lightC(6) The second paint layer (5) is internally removed. The invention also relates to a coated plastic panel and a household appliance comprising the coated plastic panel.
Description
Technical Field
The present invention relates to a method for producing a coated plastic panel, a coated plastic panel and a household appliance comprising the coated plastic panel.
Background
Publication WO 2005/042248 a1 describes a multilayer composite.
Publication WO 2006/025016 a1 describes a method and apparatus for applying a pattern.
Publication DE 4419197 a1 describes a method for producing a coating with a coloured decoration.
Patent document US 6007929 a describes a solution for marking objects for identification.
The household appliance usually has an operating panel with an operating dashboard which provides the possibility of setting the programs executed in the household appliance and displaying information about the execution of the selected program. Household appliances are here, for example, laundry treatment appliances such as washing machines, dryers and washer-dryers, dish washing appliances, microwave appliances, ovens, stoves, blenders, coffee machines and the like. The display of the information and the selected program is usually effected here by means of an optical display, in which case the program, which usually corresponds to the respective display area, can be highlighted by illuminating this display area, so that the execution of the program can be displayed in particular thereby. The operating panel can be very complex to construct. The operating panel is usually substantially made of one or more plastics. The operating panel is also referred to herein as a plastic panel.
DE 102005024934 a1 describes an operating panel arrangement for a household appliance, which operating panel arrangement has a panel base, a transparent cover and an information carrier which displays graphic design elements, such as plain text characters, position markings, symbols and/or frame-shaped elements, wherein the information carrier is composed of at least two carrier elements, wherein each carrier element carries a part of the graphic elements.
DE 102007048222 a1 describes a touch-sensitive screen, in which at least one capacitive touch sensor is produced as a planar electrode on a transparent carrier plate by printing technology, wherein the transparent carrier plate is composed in particular of glass and plastic, and the planar electrode with a transparent, electrically conductive lacquer is printed on the rear side of the transparent carrier plate opposite the operating side.
DE 102009045665 a1 describes an operating device for a household appliance, which has an operating panel, a display unit and a separating frame, by means of which the operating panel and the display unit are arranged at a distance from one another, wherein the separating frame is formed integrally with a housing part of a housing of the operating device.
DE 102011006402 a1 describes an operating panel of a household appliance, which is composed of a plastic material that can be injected into an injection molding tool in a plasticized state and thus constitutes the panel plastic, and which has at least one partial section for receiving a touch element, which is received by a touch element film strip that is connected to the panel plastic in a precisely positioned and permanent manner, in particular on the surface of the operating panel, by means of an injection molding process for producing the operating panel.
DE 102010028164 a1 describes a control device for a household appliance having a touch-sensitive operating surface and a display unit having a housing and a circuit carrier, the housing being releasably connected to the circuit carrier.
EP 1970479 a2 describes an operating panel for controlling the operation of a device, wherein the operating panel comprises: a translucent cover; a film disposed behind the cover, said film being printed with a plurality of letters or symbols; a detection panel behind the membrane, the detection panel having a plurality of detection units to show a capacitance of the human body; a control panel having a unit emitting light, the control panel directing the light onto the film so as to display letters or symbols of the film on a surface of a rear face of the translucent cover; and a guide unit having a plurality of light paths that guide the light emitted from the light-emitting unit into each letter or symbol of the film.
DE 102010063014 a1 describes an operating panel, preferably for a household appliance, in particular for a washing machine, a washer dryer or a laundry dryer, for determining an at least partially automatically operating laundry treatment process, wherein the operating panel has a protruding configuration in the form of a panel-like structure with respect to a housing of the household appliance, wherein a panel base body is provided to which a cover, which surrounds the panel base body almost completely, can be attached.
DE 10051075 a1 describes a method for producing different operating panels for household appliances, in particular for cooking appliances, laundry treatment appliances, dish washing machines or cold storage appliances and/or freezer appliances, in which method:
a) providing mutually identical, pre-fabricated panel carriers,
b) at least two differently shaped panel coverings are provided,
c) each of the provided panel covers is secured to the front surface of one of the provided panel carriers, respectively.
The panels described in the prior art are in part of very complex construction and can be produced in only a plurality of steps, wherein in particular also tools suitable for the desired panel have to be used. Furthermore, for the production of different household appliances, it is desirable to have a panel adapted to the household appliance and in particular also to the installation site thereof. This however results in a large number of necessary panels and panel variants.
The operating panel is usually provided with a coating, for example a light-impermeable lacquer coating, in order to display information, to make certain parts of the household appliance invisible to the user, and/or to protect the surface of the operating panel, primarily when a transparent panel base is used. Depending on the provided control panel comprising the display, the insulation effort for producing the coated control panel can be very high, in order not to negatively influence the function of the control elements and the display elements.
Disclosure of Invention
Against this background, the object of the present invention is to provide a method for producing a coated plastic panel, which allows a simplified production of a plurality of different plastic panels, which can also be used in particular as operating panels. Furthermore, the object of the invention is to provide such a coated plastic panel and a household appliance comprising such a coated plastic panel.
According to the invention, the solution of this object is achieved by a method for producing a coated plastic panel, a coated plastic panel and a household appliance comprising the coated plastic panel having the corresponding features of the invention. Preferred embodiments of the method according to the invention, of the plastic panel according to the invention and of the household appliance comprising the plastic panel are specified in the corresponding claims. Preferred embodiments of the method according to the invention, of the plastic panel according to the invention and of the domestic appliance comprising the plastic panel correspond here to one another, also when this is not described in detail.
The subject of the invention is thus a method for manufacturing a coated plastic panel, comprising the following steps:
(a) providing a plastic body composed of an at least partially transparent plastic;
(b) applying a first lacquer layer, which blocks light, to the surface of the plastic body;
(c) applying a second paint layer over the light blocking first paint layer of step (b), wherein the second paint layer is light transmissive to the first paint layer; and
(d) coated partial surface T of a surface by means of infrared laser radiationCAnd internally removing the second paint layer.
In a preferred embodiment of the process according to the invention, step (e) is carried out:
(e) by means of infrared laser radiation on part of surface TCLower surface T ofC1The first paint layer is removed.
In the method according to the invention, the second lacquer layer is more transparent than the first lacquer layer. This can be achieved, for example, by the second lacquer layer being thinner than the first lacquer layer and/or being made of a material of lower optical density.
In a preferred embodiment of the process according to the invention, step (a) is followed by step (a 1):
(a1) applying a coloured plastic film to the uncoated partial surface T of the surface of the plastic bodyFThe above. The colored plastic film is usually designed such that it can be permanently adhered to the surface of the plastic body. In this embodiment, it is preferable that in step (ii)(e) In said partial surface TCAt least partially on part of surface TFIn (1). This means in particular that the lacquer layer on the colored plastic film can be removed in a targeted manner in such a way that symbols, characters and other markings can be displayed thereby, which symbols, characters and other markings can then be seen in the color of the colored plastic film. Depending on the coloration of the colored plastic film, different symbols, characters and other markings can be displayed.
Advantageously, in this embodiment in step (e) the partial surface TCLocated wholly on part of surface TFIn (1).
Generally the coated plastic film according to the invention is illuminated from behind by one or more light sources. The painted representation of the symbol or the like can then be more highlighted by illumination.
In a particularly preferred embodiment of the process according to the invention, step (a2) is carried out following step (a) or (a 1):
(a2) applying a covering film to the uncoated partial surface T of the surface of the plastic bodyKWherein the cover film comprises a release film and has a side profile;
steps (d1) and (d2) are typically followed in time after step (c):
(d1) removing the first and second lacquer layers applied in steps (b) and (c) along the side contour by means of infrared laser radiation; and
(d2) and removing the removable film.
It may be preferable to apply an uncoated partial surface T of the surface after step (d2) in terms of timeKThe laser radiation is partially applied until a predetermined change in the light transmission is achieved there. In particular, this makes it possible to coat uncoated partial surfaces TKOpaque characters, symbols and other indicia are displayed therein.
When a step is carried out "after a further step in time" in this context, this means that the step is carried out directly or indirectly after the further step.
In a preferred embodiment of the method according to the invention, the cover film is formed by a release film in the case of a cover film. However, the use of a cover film makes it possible to realize other advantageous design possibilities.
Therefore, in the case of using a cover film, it is preferable to use a cover film which is a laminate of a release film and at least one other film, wherein the release film has an adhesive force F after step (a2)1Adhering to the remaining laminate of at least one further film, the adhesion force being less than the adhesion force F between the plastic body and the film lying thereon2And if necessary less than the adhesion force F between the further filmsn-2Wherein n is the number of films in the laminate.
According to the invention, it is preferred that in step (d1) the first and second lacquer layer and, if present, further layers are removed along the side contour (12) within a width of 0.2 to 1mm, preferably 0.3 to 0.8mm, in particular 0.4 to 0.7 mm. It is to be noted that in this way, in the case of the use of a plurality of lacquer layers, the release film can be removed easily and reliably. The lacquer layer can be removed here only on the film or also partially on the coated surface of the plastic body. Preferably, 25 to 50% of the total removal width of the lacquer layer, in particular of the first and second lacquer layer, is removed on the coated surface of the plastic body.
The plastic body is not restricted according to the invention, as long as sufficient transparency is achieved and properties matched to the respective purpose of use can be achieved. The term "plastic body" as used herein therefore means, in particular, that the plastic body consists essentially of plastic. Whereby e.g. metals or inorganic/organic compounds may be included to some extent in the plastic body. The plastic content present in the plastic body may consist of any plastic, as long as partial transparency is achieved and the plastic is suitable for use in a plastic panel. However, it is preferred according to the invention that the plastic body comprises or consists of a plastic selected from the group consisting of Styrene Acrylonitrile (SAN) copolymer, polymethyl methacrylate (PMMA), Polycarbonate (PC) and Acrylonitrile Butadiene Styrene (ABS) copolymer. It is also preferred that the panel base body is a flat or curved plastic plate.
According to the invention, it is preferred that the partial surface TCAnd a partial surface TFAnd/or part of surface TKLocated within the surface of the plastic body. This usually means that the part surface is at a distance from the edge of the plastic body. The side profile according to the embodiment of the method according to the invention is therefore preferably located in the surface of the plastic body. The side contour thus has a distance from the boundary of the plastic body that is not equal to zero.
The coated plastic panels usually contain operating elements for controlling the household appliance. The operating element can be a mechanically movable switch and/or preferably touch-sensitive. The touch-sensitive operating element is preferably based on a change in capacitance.
In a preferred embodiment of the method according to the invention, the cover film and/or the colored plastic film comprise the sensor element.
The application of the cover film and/or the colored plastic film used in the method according to the invention can be carried out in various ways, in particular by gluing or welding, and is independent of whether the cover film is composed of a release film only or of a laminate composed of a plurality of films, for example. A self-adhesive cover film and/or a self-adhesive coloured plastic film can thus be used. The self-adhesive film here has an adhesive material on the adhesive side, which is preferably a hot-melt pressure-sensitive adhesive.
However, it is also possible to provide, for example, a non-self-adhesive film which is then applied to the plastic body, in particular by ultrasonic welding or laser welding.
According to the invention, it is preferable in one embodiment of the method according to the invention to use self-adhesive films in steps (a1) and/or (a 2).
The cover film and/or the colored plastic film usually comprise or consist of a thermoplastic, for example PMMA, polyethylene terephthalate and/or polycarbonate. Preferably, the cover film and/or the colored plastic film comprise or consist of polyethylene terephthalate and/or polycarbonate. The plastic used can be the same for both cases, so that the terms "plastic film" and "colored plastic film" used here deviate in particular from the intended use and the particular configuration resulting therefrom.
The film made of the aforementioned materials can be adapted well to curved or otherwise shaped bodies on account of its flexibility and can be produced at the same time inexpensively and cost-effectively. For the purpose of graphic design, the film can also be printed without distortion in the flat state before it is placed on the plastic body.
Infrared laser radiation is generally used in the method according to the invention.
According to the invention, the composition of the lacquer layer is not limited, preferably a respective color lacquer is used, which can be selected to suit the intended use, for example to provide a light-tight covering or a specific design layer. The application of the lacquer layer in steps (b) and (c) is thus preferably the application of one respective lacquer. A color lacquer is usually present here first as a more or less viscous liquid which is applied by the usual printing technique, for example screen printing. It is therefore usually first applied with a hardenable paint. A preferably sequential hardening of the individual paint layers is usually carried out in a further step. This feature is not studied in detail in the present invention, so that the "application of a lacquer layer" here comprises the application of a more or less viscous lacquer and its subsequent hardening step. The hardening step is generally related to the type of lacquer used. Thus, the hardening step may be heating or radiation, e.g. ultraviolet radiation. Crosslinking of the constituents of the lacquer layer is generally effected by means of uv radiation.
For the reasons mentioned above, the detachment of the lacquer layer is in particular the detachment of the hardened lacquer layer.
One or more of the cover films and/or the colored plastic films used in the embodiment of the method according to the invention can contain operating elements for operating, for example, the energy of the household appliance and display elements for displaying, for example, the operating state of the household appliance. The information carrier film or films, which contain graphic elements, for example plain text characters, position markings, symbols and/or frame-shaped elements, can be easily applied to the plastic body according to the invention in such a way that, when the removable film is removed, for example, the information carrier film or films remain on the plastic body after the film has been applied. In particular, the adaptation of an operating panel used as a coated plastic panel to configuration variants and/or national variants of household appliances can be carried out cost-effectively, since only the film has to be replaced if necessary. That is, the information to be displayed may be distributed over more than one film, with each film carrying a portion of the graphic element. By means of a targeted and suitable combination of the different printed films, a plurality of variants of the operating unit and thus an operating panel can be produced. That is, the information-bearing film, which for example provides information in a different language, can be changed by exchanging one film for another printed film. Further, the number of films to be provided for forming films carrying information of different designs can be limited by appropriately selecting the figure elements for the films, respectively. In other words, the film used in the embodiment of the method according to the invention can in particular have a plurality of films, i.e. be used as a laminate, so that adaptations to different languages can be carried out. For this purpose, certain display elements, for example symbols, can be arranged on the film, while language elements are arranged on specific films. However, it is also possible in particular for both to be on the same film.
However, it has been possible to show different display elements according to the invention, in particular by suitably applying a lacquer layer and partially removing said lacquer layer.
Furthermore, the defined color of the operating unit can be set by inserting a film having the defined color or by providing a paint layer having the defined color.
In a particularly preferred embodiment of the invention, the cover film used is contained in the remaining part of the plastic body, i.e. not in the removable film, the sensor element, which may also be referred to as "sensor button". The membrane, which may also be referred to as a sensor membrane, containing the sensor element is therefore directly or indirectly connected to the plastic body. The concept "sensor element" as used herein may already be explained. In addition to touch-sensitive keys, touch-sensitive touch elements with analog input, which are often referred to as "sliders" or "scroll wheels", also belong to the sensor element.
The sensor element is usually designed as a sensor surface or sensor electrode made of a suitable material. The sensor elements used in the sensor film can be based on different measurement principles, for example resistance or capacitance measurements. The capacitance is preferably measured, so that the sensor element is preferably a capacitive sensor (sensor electrode). The sensor electrodes are made of a suitable conductive material, the change in capacitance of which is detected and evaluated when touched. Suitable conductive materials are, for example, transparent semiconducting oxides, or else conductive organic materials, for example conductive organic polymers.
If a sensor film is used, the sensor element and the printed circuit can be applied to the sensor film in different ways. In a preferred embodiment of the invention, at least one capacitive sensor electrode and a printed circuit are printed onto the sensor film.
In addition to metallic conductive structures, organic conductive structures can also be used on the sensor film used in the preferred embodiment. Thus, in embodiments in which the sensor element is a capacitive sensor, it is common to include a capacitive sensor, at least one of which and/or the printed circuit is or is composed of an organic polymer or metallic conductive material that is itself conductive.
Furthermore, the aforementioned operating symbols and characters can also be arranged, in particular glued or printed, on or in the sensor film.
It is also possible to use a membrane with position-dependent haptic elements, which membrane can be advantageously used in operation for distinguishing and/or better identifying touch-sensitive sensor elements/keys.
The coating technique for the film is not particularly limited as long as sufficient adhesion is ensured. Preferably, the printing technique is also not particularly limited. Preferably, the printing is performed by screen printing.
Furthermore, the subject of the invention is a coated plastic panel obtained by a process comprising the following steps:
(a) providing a plastic body composed of an at least partially transparent plastic;
(b) applying a first lacquer layer, which blocks light, to the surface of the plastic body;
(c) applying a second paint layer over the light blocking first paint layer of step (b), wherein the second paint layer is light transmissive to the first paint layer; and
(d) coating a partial surface T of the surface by means of infrared laser radiationCAnd internally removing the second paint layer.
In a preferred embodiment of the coated plastic panel, an at least partially light-transmitting film having the sensor element and the electrically conductive structure is arranged on the plastic body. In particular, the circuit also belongs to the conductive structure. Furthermore, the electrical connections can also be arranged on the sensor membrane.
The subject matter of the invention is furthermore a household appliance comprising the coated plastic panel, in particular a household appliance having a program control device and a plastic panel as described herein.
The household appliance is not limited according to the present invention. The household appliance is preferably selected from the group consisting of laundry treatment appliances, such as washing machines, dryers and washing-dryers, dish washing appliances, refrigeration appliances, microwave appliances, ovens, ranges, blenders and coffee machines.
The invention has a number of advantages. The invention enables different operating panels to be produced in a simple manner. For this purpose, the film and/or lacquer layer to be applied only has to be designed accordingly and optionally removed, in particular by infrared laser radiation, wherein the invention already enables the position of the symbols and characters to be changed. The panel base, i.e. the plastic base, does not need to be opened in a complicated manner in order to mount the operating unit.
In particular, it is possible to produce different appliance variants or different operating panels of different household appliances on the basis of a common plastic body and to change the coating used and, if necessary, one or more of the films used or the film laminates used. This eliminates the need to replace the completely produced control panel or the complex information carrier
The invention achieves that in one embodiment, the cost of insulation is reduced by using a lacquer layer that can be removed by infrared laser radiation during painting, and in one embodiment also by using a plastic film, which is also referred to herein as a painted plastic film, and a removable or non-removable plastic film covering the film. A quick change of the variant and a quick change of the display window is achieved. In one embodiment of the invention, the expenditure on tool parts for plastic components is lower and can be better controlled. Furthermore, cost savings are achieved by eliminating several process steps, such as isolation, printing, cleaning, etc.
Drawings
The invention is illustrated below with reference to fig. 1 to 3, in which the parts of the coated plastic panel according to the invention relevant according to the invention are shown.
Fig. 1 shows a top view of a coated plastic panel obtained according to the invention according to a first embodiment, without limitation.
Fig. 2 shows a side view of a coated plastic panel obtained in performing the method according to the invention.
Fig. 3 shows a side view of the coated plastic panel after carrying out steps (b) and (c) of the method according to the invention.
Detailed Description
Fig. 1 shows a top view of a coated plastic panel 1 obtained according to the invention according to a first embodiment, without limitation. A coating layer, shown in hatched lines, of a first and a second paint layer, each comprising a cured color paint, is located on the plastic panel 1 or on the surface 4 of the plastic body of the plastic panel 1 underneath. In this particular embodiment, the uncoated partial tableSurface T K13 is located within the surface 4, a cover film with a release film is placed on the uncoated partial surface in step (a2) during the execution of an embodiment of the method according to the invention. The coating of the first and second paint layers applied to the release film is removed together with the release film. Part of surface T K13 are located entirely within the surface 4.
Fig. 2 shows a side view of a coated plastic panel 1 obtained in performing the method according to the invention. The plastic panel 1 shown in fig. 2 has a first paint layer 3 and a second paint layer 5 on a surface 4 of the plastic body 2, which are transparent coatings of at least one color paint. On a part of the surface T of the plastic body 2KA laminate of a first film 14, which is arranged directly on the plastic body 2 and can therefore also be referred to as a front sheet film, and a second film 15, in which the sensor element 16 is located as part of the touch-sensitive operating device and can therefore also be referred to as a sensor film, is arranged on the top 13 ("residual laminate", i.e. after removal of the release film which is no longer present here). The printed operating symbols 17 and characters 18 are located in the first film 14. Adaptation to different countries and/or languages can thus be achieved by using different films 14.
In the embodiment of the coated plastic panel 1 shown in fig. 2, step (a) of the method according to the invention then consists in applying a colored, for example red-colored, plastic film 8 to the uncoated partial surface T of the surface 4 of the plastic body 2 in step (a1)FAnd 9, respectively. In the following steps (b) and (c) of the method according to the invention, the first lacquer layer 3 and the second lacquer layer 5 are likewise applied to this partial surface. In fig. 2, the lacquer layer is also present completely on the colored plastic film 8 for reasons of simplicity of illustration.
Fig. 2 also shows how the first paint layer 3 and the second paint layer 5 can be removed in a targeted manner by laser radiation, in particular infrared laser radiation. This step is also known as laser etching.
That is, the case is shown in FIG. 2, at the rootAccording to step (d) of the method of the invention, a portion of the surface T is coatedCThe second lacquer layer 5 is removed in 6. In fig. 2, the first paint layer 3 is also removed, at least at some locations where the second paint layer 5 has been removed, according to a preferred embodiment of the method according to the invention. That is to say that the first paint layer 3 is present here on a part of the surface T C6 lower surface TC1And 7 are removed. By removing a part of the one or more lacquer layers, coated plastic panels with different designs can thus be produced. By means of this targeted removal, the previously colored plastic film can also be exposed at the desired location, so that symbols or characters in the color of the colored plastic film can be obtained in a targeted manner.
Fig. 3 shows a side view of the coated plastic panel after carrying out steps (b) and (c) of the method according to the invention. The reference numerals already cited in fig. 2 have the same meaning here. The cover film 10 used in one embodiment of the method according to the invention can be seen in a coated plastic panel. That is to say, in addition to the arrangement in fig. 2, a release film 11 is applied to the remaining laminate of films 14 and 15, on which the coating 3, 5 of the first paint layer 3 and the second paint layer 5 is located. In step (d) of the process according to the invention: i.e. removing the second lacquer layer 5 applied in step (c) and step (e) of one embodiment of the method according to the invention: after the first lacquer layer 3 has also been removed along the side contours 12 of the cover film 10 and the release film 11 has finally been removed, the left-hand part of the coated plastic panel shown in fig. 2 is obtained.
List of reference numerals
1 Plastic Panel
2 Plastic body
3 first paint layer
4 surface of plastic body
5 second paint layer
6 part surface TC
7 lower surface TC1
8 Plastic film
9 part of surface TF
10 cover film
11 removable film
12 side profile
13 part surface TK
14 first film, Panel film
15 second film, sensor film
16 sensor element
17 operation symbol
18 character
19 the boundaries of the plastic body.
Claims (16)
1. A method for manufacturing a coated plastic panel (1) for a household appliance, comprising the steps of:
(a) providing a plastic body (2) made of an at least partially transparent plastic, wherein the plastic body (2) is a flat or curved plastic plate;
(b) applying a first lacquer layer (3) that blocks light to a surface (4) of the plastic body (2);
(c) applying a second lacquer layer (5) on the light-blocking first lacquer layer (3) of step (b), wherein the second lacquer layer (5) is light-transmitting than the first lacquer layer (3); and
(d) applying infrared laser radiation to the coated partial surface T of the surface (4)C(6) Internally removing the second paint layer (5),
wherein step (a) is followed by step (a 1):
(a1) applying a coloured plastic film (8) to the uncoated partial surface T of the surface (4) of the plastic body (2)F(9) In the above-mentioned manner,
wherein step (a2) is performed following step (a) or (a 1):
(a2) applying a covering film (10) to the uncoated partial surface T of the surface (4) of the plastic body (2)K(13) Wherein the cover film (10) comprises a release film (11) and has a side profile (12); and is
Temporally after step (c) performing steps (d1) and (d 2):
(d1) removing the first (3) and second (5) lacquer layers applied in steps (b) and (c) along the side contour (12) by means of infrared laser radiation; and
(d2) peeling off the release film (11),
wherein the cover film (10) and/or the colored plastic film (8) comprise a sensor element (16).
2. The method of claim 1, wherein step (e) is performed:
(e) by means of infrared laser radiation on said part of the surface TC(6) Lower surface T ofC1(7) Removing the first lacquer layer (3).
3. Method according to claim 1 or 2, characterized in that in step (e) said partial surface TC(6) At least partially on said part surface TF(9) In (1).
4. A method according to claim 3, wherein in step (e) the partial surface TC(6) Is entirely located on said partial surface TF(9) In (1).
5. The method according to claim 1 or 2, wherein step (d3) is performed temporally after step (d 2):
(d3) to uncoated part of the surface (4)K(13) The laser radiation is partially applied until a predetermined change in the light transmission is achieved there.
6. The method according to claim 1 or 2, wherein the cover film (10) is a laminate of the release film (11) and at least one further film (14, 15), wherein the release film (11) is bonded after step (a2) with a bonding force F1Adhering to the remaining laminate of the at least one further film (14, 15) with a lower adhesion than the plasticThe adhesive force F between the body (2) and the film (14, 15) on the plastic body2And the adhesion F between the further films (14, 15)n-2Wherein n is the number of films in the laminate.
7. Method according to claim 1 or 2, characterized in that the first lacquer layer (3) and the second lacquer layer (5) are removed in step (d1) along the side contour (12) within a width of 0.2 to 1 mm.
8. The method according to claim 1 or 2, wherein the plastic body (2) comprises a plastic selected from the group comprising Styrene Acrylonitrile (SAN) copolymer, Polymethylmethacrylate (PMMA), Polycarbonate (PC) and Acrylonitrile Butadiene Styrene (ABS) copolymer.
9. Method according to claim 1 or 2, characterized in that said partial surface TC(6) And the partial surface TF(9) And/or said part surface TK(13) Is located in the surface (4) of the plastic body (2).
10. Method according to claim 8, characterized in that the plastic body (2) consists of the plastic.
11. A coated plastic panel (1) for a household appliance, obtained by a method comprising the steps of:
(a) providing a plastic body (2) made of an at least partially transparent plastic, wherein the plastic body (2) is a flat or curved plastic plate;
(b) applying a first lacquer layer (3) that blocks light to a surface (4) of the plastic body (2);
(c) applying a second lacquer layer (5) on the light-blocking first lacquer layer (3) of step (b), wherein the second lacquer layer (5) is light-transmitting than the first lacquer layer (3); and
(d) by means of infrared laser radiation at said surface (4)Coated partial surface TC(6) Internally removing the second paint layer (5),
wherein step (a) is followed by step (a 1):
(a1) applying a coloured plastic film (8) to the uncoated partial surface T of the surface (4) of the plastic body (2)F(9) In the above-mentioned manner,
wherein step (a2) is performed following step (a) or (a 1):
(a2) applying a covering film (10) to the uncoated partial surface T of the surface (4) of the plastic body (2)K(13) Wherein the cover film (10) comprises a release film (11) and has a side profile (12); and is
Temporally after step (c) performing steps (d1) and (d 2):
(d1) removing the first (3) and second (5) lacquer layers applied in steps (b) and (c) along the side contour (12) by means of infrared laser radiation; and
(d2) peeling off the release film (11),
wherein the cover film (10) and/or the colored plastic film (8) comprise a sensor element (16).
12. A household appliance comprising a coated plastic panel (1) according to claim 11.
13. The household appliance according to claim 12, wherein the household appliance is selected from the group consisting of a laundry treatment appliance, a refrigeration appliance, a microwave appliance, an oven, a range, a blender and a coffee machine.
14. The household appliance of claim 13, wherein the laundry treatment appliance comprises a washing machine and a dryer.
15. The household appliance according to claim 13, wherein the laundry treatment appliance comprises a washer-dryer.
16. The domestic appliance of claim 12 wherein said domestic appliance comprises a dish washing appliance.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016214644.0A DE102016214644A1 (en) | 2016-08-08 | 2016-08-08 | Process for producing a coated plastic panel, plastic panel and domestic appliance containing this plastic panel |
| DE102016214644.0 | 2016-08-08 | ||
| PCT/EP2017/068109 WO2018028950A1 (en) | 2016-08-08 | 2017-07-18 | Method for producing a coated plastic panel, a plastic panel, and household appliance containing said plastic panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109562411A CN109562411A (en) | 2019-04-02 |
| CN109562411B true CN109562411B (en) | 2021-09-28 |
Family
ID=59399411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780047684.2A Active CN109562411B (en) | 2016-08-08 | 2017-07-18 | Method for producing a coated plastic panel, plastic panel and household appliance comprising the plastic panel |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3496871B1 (en) |
| CN (1) | CN109562411B (en) |
| DE (1) | DE102016214644A1 (en) |
| PL (1) | PL3496871T3 (en) |
| WO (1) | WO2018028950A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3099714B1 (en) * | 2019-08-05 | 2023-04-14 | Cie Plastic Omnium Se | Process for manufacturing a transparent vehicle part |
| DE102020121562B4 (en) | 2020-08-17 | 2023-03-09 | Preh Gmbh | Control panel with improved fastening of a film layer structure for capacitive touch detection and the associated assembly method |
| FR3138056A1 (en) * | 2022-07-21 | 2024-01-26 | Compagnie Plastic Omnium Se | Process for manufacturing a vehicle part provided with a coating |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3496871B1 (en) | 2020-09-09 |
| PL3496871T3 (en) | 2021-03-08 |
| DE102016214644A1 (en) | 2018-02-08 |
| WO2018028950A1 (en) | 2018-02-15 |
| EP3496871A1 (en) | 2019-06-19 |
| CN109562411A (en) | 2019-04-02 |
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