Wire light-emitting wave-transparent lampshade and processing method thereof

Abstract

The application belongs to the technical field of automobile nameplates, and particularly relates to a linear light-emitting wave-transparent lampshade and a processing method thereof. The linear light-emitting wave-transparent lampshade comprises a lampshade body, the inner surface of the lampshade body is provided with a first heat transfer printing area and a second heat transfer printing area which is divided into multiple parts by the first heat transfer printing area, a groove structure is arranged on the outer periphery of the first heat transfer printing area and between the first heat transfer printing area and the second heat transfer printing area, the groove structure is used for realizing linear light emission and air exhaust, the processing method is used for processing the linear light-emitting wave-transparent lampshade, and the steps include injection molding, stress relief, electrostatic dust removal, first heat transfer printing and second heat transfer printing. The application does not need to use multiple processes in combination, improves the qualified rate of products, reduces the production cost, solves the potential pollution problem, realizes the decoration effect through the combined use of the heat transfer film layer structure, and further realizes the wave-transparent function through the use of the functional film layer.

Description

Technical Field

[0001] This invention belongs to the field of automotive signage technology, specifically relating to a linear light-emitting translucent lamp cover and its processing method. Background Technology

[0002] The trend towards electrification and personalization in new energy vehicles has gradually become an industry consensus. Illuminated car emblems not only enhance nighttime visibility but also convey a youthful and sporty feel, with the emblem light cover playing an indispensable role in the illumination process. With the development of advanced autonomous driving and the widespread adoption of intelligent and autonomous driving technologies, integrating millimeter-wave radar into car emblems is a good option. Therefore, the light cover, while having a decorative effect, also needs to possess millimeter-wave transmission capabilities.

[0003] To achieve linear emission using current technology, a combination of multiple processes is usually required. Laser engraving is a common method to remove the metal film layer. However, this is a destructive processing method that requires high positioning accuracy. The edges of the laser-engraved film layer often have problems such as unclear edges and burrs. Furthermore, a spraying process is required to apply a primer to ensure the adhesion between the metal layer and the substrate.

[0004] In patent CN112644372A, the sign light cover (outer cover) needs to be electroplated with water. In order to achieve the linear light emission effect, laser engraving is used to remove part of the film layer. Electroplating also has certain pollution problems. Laser engraving requires high positioning accuracy. The combination of multiple processes will also reduce the product qualification rate and increase production costs. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of complex processing methods for linear light-emitting lampshades in the prior art, which require multiple processes to achieve linear light emission and pose potential pollution, and to provide a linear light-emitting transparent lampshade and its processing method.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a linear light-emitting transparent lampshade, comprising a lampshade body, wherein the inner surface of the lampshade body has a first heat transfer area and a second heat transfer area divided into multiple parts by the first heat transfer area, wherein a groove structure is provided on the outer periphery of the first heat transfer area and between the first heat transfer area and the second heat transfer area, the groove structure being used to realize linear light emission and air exhaust.

[0007] Preferably, the first heat transfer area and the second heat transfer area are respectively provided with a first heat transfer film layer and a second heat transfer film layer.

[0008] Preferably, the first heat transfer film layer and the second heat transfer film layer each include a first color film layer and a second color film layer. A metal indium layer and a hot melt adhesive layer are sequentially provided between the first color film layer and the lampshade body at the first heat transfer area, and between the second color film layer and the lampshade body at the second heat transfer area.

[0009] A method for processing a linear light-emitting, wave-transparent lampshade, comprising the following steps:

[0010] S1. Injection molding: The lamp cover body is formed by single-color injection molding using a car light and logo mold. The mold core is pre-reserved with protrusions so that a groove structure can be pre-formed on the inner surface of the lamp cover body after injection molding.

[0011] S2. Stress relief: The lampshade body is placed in an oven or tempering furnace at a preset temperature for baking to remove the residual stress generated during the injection molding process of the lampshade body.

[0012] S3. Electrostatic dust removal: Use an electrostatic dust removal gun to repeatedly blow the inner surface of the lamp cover.

[0013] S4. First heat transfer: Place the lampshade body on the positioning fixture. A first heat transfer head and a first heat transfer film layer are set above the inner surface of the lampshade body. The first heat transfer film layer is pressed onto the first heat transfer area on the inner surface of the lampshade body through the first heat transfer head. The release layer and color film layer are separated by the foil sweeping device. The first color film layer, the indium metal layer and the hot melt adhesive layer are transferred onto the surface of the first heat transfer area.

[0014] S5. Second heat transfer: Keep the lampshade body on the positioning fixture, replace the second heat transfer head and the second heat transfer film layer on the inner surface of the lampshade body. Press the second heat transfer film layer onto the second heat transfer area on the inner surface of the lampshade body through the second heat transfer head. Separate the release layer and the color film layer through the foil sweeping device. The second color film layer, the metal indium layer and the hot melt adhesive layer are transferred onto the surface of the second heat transfer area.

[0015] Preferably, in step S1, the lampshade body is injection molded from a transparent material with a transmittance of not less than 85%, and the transparent material is selected from polycarbonate or acrylic.

[0016] Preferably, in step S1, the thickness of the lampshade body is 2-3mm, the width of the groove structure is 1.5-2mm, and the height is 0.5-1mm.

[0017] Preferably, in step S2, the baking temperature is 80-120℃ and the baking time is 1-3 hours; in step S3, the blowing time is 10-20 seconds; and the distance between the electrostatic dust removal gun and the inner surface of the lampshade is 10-20 cm.

[0018] Preferably, in steps S4-5, the first heat transfer film layer and the second heat transfer film layer further include a release layer that facilitates separation from the first or second color film layer after printing, and a thin film base layer for bearing.

[0019] Preferably, the heat transfer temperature in steps S4-5 is 170-230℃, and the printing time is 0.3-1.3s.

[0020] After adopting the above technical solution, the linear light-emitting wave-transparent lampshade processing method provided by the present invention has the following beneficial effects:

[0021] 1) This invention, through the combined design of thermal transfer printing process and linear light emission exhaust groove structure, can improve the overall pass rate and shorten the production cycle;

[0022] 2) The processing method used in this invention is an environmentally friendly process path, which avoids the current reliance on heavily polluting processes such as electroplating and spraying for light-emitting lamp covers, making it greener and more environmentally friendly, and eliminating environmental pollution problems;

[0023] 3) This invention achieves a decorative effect through the combined use of thermal transfer film layer structures, and further achieves wave transmission function through the use of functional film layers. Attached Figure Description

[0024] Figure 1 This is a top view of the lampshade body in this invention;

[0025] Figure 2 This is a cross-sectional view of the lampshade body in this invention;

[0026] Figure 3 This is a schematic diagram of the structure of the heat transfer film layer in this invention;

[0027] Figure 4 This is a schematic diagram of the lampshade body after the first heat transfer printing in this invention;

[0028] Figure 5 This is a cross-sectional view of the first heat transfer area in this invention;

[0029] Figure 6 This is a schematic diagram of the lampshade body after the second heat transfer printing in this invention;

[0030] Figure 7 This is a cross-sectional view of the second heat transfer zone in this invention.

[0031] Wherein: first heat transfer area 1, groove structure 2, second heat transfer area 3, first heat transfer film layer 5, second heat transfer film layer 6. Detailed Implementation

[0032] The present invention will now be described more clearly and completely with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0035] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0036] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0037] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0038] like Figure 1-2 As shown, the present invention provides a linear light-emitting translucent lampshade, comprising a lampshade body. The inner surface of the lampshade body has a first heat transfer area 1 and a second heat transfer area 3 divided into multiple parts by the first heat transfer area 1. Groove structures 2 are provided on the outer periphery of the first heat transfer area 1 and between the first heat transfer area 1 and the second heat transfer area 3. The groove structure 2 can achieve the effect of linear light emission on the one hand, and on the other hand, it helps to effectively expel air between the heat transfer film and the inner surface of the lampshade body during the subsequent heat transfer process.

[0039] The first heat transfer area 1 and the second heat transfer area 3 are respectively provided with a first heat transfer film layer 5 and a second heat transfer film layer 6. The first heat transfer film layer 5 and the second heat transfer film layer 6 respectively include a first color film layer and a second color film layer. A metal indium layer and a hot melt adhesive layer are sequentially provided between the first color film layer and the lampshade body at the first heat transfer area 1, and between the second color film layer and the lampshade body at the second heat transfer area 3.

[0040] It should be noted that the structure of the heat transfer film layer 4 in this invention is as follows: Figure 3 As shown, it includes a hot melt adhesive layer 41, an indium metal layer 42, a color film layer 43, a release layer 44, and a thin film base layer 45 arranged sequentially. Specifically:

[0041] The hot melt adhesive layer 41 is a thermoplastic resin that is easily melted and used for bonding with the substrate of the part;

[0042] Indium 42 is a nanoscale indium layer used for the penetration and reception of millimeter radar waves. It is a film with a metallic luster, which makes the color film more lustrous.

[0043] Color film layer 43 is a synthetic resin and dye with high transparency, which plays a decorative role and protects the metal indium layer. Preferably, different dyes can be selected according to color requirements to achieve different color effects.

[0044] Release layer 44 is mainly made of silicone resin, which facilitates separation from the color coating after film transfer;

[0045] The film base layer 45 is a polyester film, which serves as the carrier layer for the aforementioned film layer.

[0046] The first heat transfer film layer 5 and the second heat transfer film layer 6 can be selected with different color film layers according to product requirements to achieve personalized color decoration effects.

[0047] like Figure 4-7 As shown, the present invention also provides a method for processing a linear light-emitting, wave-transparent lampshade, for use in the aforementioned linear light-emitting, wave-transparent lampshade, comprising the following steps:

[0048] S1. Injection Molding: The lamp cover body is injection molded in monochrome using a vehicle light and logo mold. A protrusion is reserved in the mold core so that a groove structure is pre-formed on the inner surface of the lamp cover body after injection molding. Furthermore, the groove structure can be reserved according to the position of the light emission required or according to the desired pattern effect. The lamp cover body is injection molded from a transparent material with a transmittance of not less than 85%. The transparent material is selected from polycarbonate or acrylic. The thickness of the lamp cover body is 2-3mm, and the width of the groove structure is 1.5-2mm and the height is 0.5-1mm.

[0049] S2. Stress relief: Place the lampshade body into an oven or tempering furnace at a preset temperature for baking to remove residual stress generated during the injection molding process of the lampshade body. The baking temperature is 80-120℃ and the baking time is 1-3 hours.

[0050] S3. Electrostatic dust removal: Use an electrostatic dust removal gun to repeatedly blow on the inner surface of the lampshade body for 10-20 seconds. The distance between the electrostatic dust removal gun and the inner surface of the lampshade is about 10-20 cm. On the one hand, this neutralizes the surface charge of the lampshade body and eliminates static electricity, and on the other hand, it removes dust and foreign objects from the surface of the lampshade body to ensure the cleanliness of the parts.

[0051] S4. First Heat Transfer: Place the lampshade body on the positioning fixture. A first heat transfer head and a first heat transfer film layer are positioned above the inner surface of the lampshade body. The first heat transfer head presses the first heat transfer film layer onto the first heat transfer area on the inner surface of the lampshade body. Specifically, the hot melt adhesive layer of the heat transfer film layer faces the inner surface of the lampshade body. The heating plate of the pneumatic heat transfer machine is controlled to heat the lampshade body, with a set temperature of 170-230℃. After heating for a certain time, the first heat transfer head, made of conformal silicone, is pressed onto the surface of the lampshade body using the start button (pressing time is 0.3-1.3s). The first color film layer, the indium metal layer, and the hot melt adhesive layer are transferred onto the surface of the first heat transfer area. The release layer and the color film layer are separated using a foil sweeping device. The lampshade structure after the first heat transfer is shown in the diagram. Figure 4 , Figure 5 As shown;

[0052] S5. Second Heat Transfer: While maintaining the lampshade body on the positioning fixture, replace the inner surface of the lampshade body with a second heat transfer head and a second heat transfer film layer. Use the second heat transfer head to press the second heat transfer film layer onto the second heat transfer area on the inner surface of the lampshade body. Specifically, the hot melt adhesive layer of the heat transfer film layer faces the inner surface of the lampshade body. Control the heating plate of the pneumatic heat transfer machine to heat the lampshade body, setting the temperature to 170-230℃. After heating for a certain time, use the start button to control the first heat transfer head of the contour silicone to press the heat transfer film layer onto the surface of the lampshade body (pressing time is 0.3-1.3s). The second color film layer, the indium metal layer, and the hot melt adhesive layer are transferred onto the surface of the second heat transfer area. Use a foil sweeping device to separate the release layer and the color film layer. The lampshade structure after the second heat transfer is shown in the diagram. Figure 6 , Figure 7 As shown.

[0053] It should be noted that both the first and second heat transfer heads can be made of silicone heat transfer head that is adapted to the required pattern according to the shape of the lampshade.

[0054] This invention provides a linear light-emitting, wave-transparent lampshade and its processing method. It eliminates the need for multiple processes, thereby improving the product qualification rate, reducing production costs, and solving potential pollution problems. Furthermore, the combination of thermal transfer film layers achieves a decorative effect, and the use of functional film layers enables wave transmission.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A linear light-emitting, wave-transparent lampshade, characterized in that, The lampshade body includes a first heat transfer area (1) and a second heat transfer area (3) which is divided into multiple parts by the first heat transfer area (1). A groove structure (2) is provided on the outer periphery of the first heat transfer area (1) and between the first heat transfer area (1) and the second heat transfer area (3). The groove structure (2) is used to realize linear light emission and air exhaust. The first heat transfer area (1) and the second heat transfer area (3) are respectively provided with a first heat transfer film layer (5) and a second heat transfer film layer (6); The first heat transfer film layer (5) and the second heat transfer film layer (6) respectively include a first color film layer and a second color film layer. The first color film layer and the lamp cover body at the first heat transfer area (1) and the second color film layer and the lamp cover body at the second heat transfer area (3) are respectively provided with an indium metal layer and a hot melt adhesive layer.

2. A method for processing a linear light-emitting, wave-transparent lampshade, characterized in that, The process for manufacturing the linear light-emitting, wave-transparent lampshade as described in claim 1 includes the following steps: S1. Injection molding: The lamp cover body is formed by single-color injection molding using a car light and logo mold. The mold core is pre-reserved with protrusions so that a groove structure can be pre-formed on the inner surface of the lamp cover body after injection molding. S2. Stress relief: The lampshade body is placed in an oven or tempering furnace at a preset temperature for baking to remove the residual stress generated during the injection molding process of the lampshade body. S3. Electrostatic dust removal: Use an electrostatic dust removal gun to repeatedly blow the inner surface of the lamp cover. S4. First heat transfer: Place the lampshade body on the positioning fixture. A first heat transfer head and a first heat transfer film layer are set above the inner surface of the lampshade body. The first heat transfer film layer is pressed onto the first heat transfer area on the inner surface of the lampshade body through the first heat transfer head. The release layer and color film layer are separated by the foil sweeping device. The first color film layer, the indium metal layer and the hot melt adhesive layer are transferred onto the surface of the first heat transfer area. S5. Second heat transfer: Keep the lampshade body on the positioning fixture, replace the second heat transfer head and the second heat transfer film layer on the inner surface of the lampshade body. Press the second heat transfer film layer onto the second heat transfer area on the inner surface of the lampshade body through the second heat transfer head. Separate the release layer and the color film layer through the foil sweeping device. The second color film layer, the metal indium layer and the hot melt adhesive layer are transferred onto the surface of the second heat transfer area.

3. The method for processing a linear light-emitting, wave-transparent lampshade according to claim 2, characterized in that: In step S1, the lampshade body is injection molded from a transparent material with a transmittance of not less than 85%, and the transparent material is selected from polycarbonate or acrylic.

4. The method for processing a linear light-emitting, wave-transparent lampshade according to claim 2, characterized in that: In step S1, the thickness of the lampshade body is 2-3mm, the width of the groove structure is 1.5-2mm, and the height is 0.5-1mm.

5. The method for processing a linear light-emitting, wave-transparent lampshade according to claim 2, characterized in that: In step S2, the baking temperature is 80-120℃ and the baking time is 1-3 hours. In step S3, the blowing time is 10-20 seconds and the distance between the electrostatic dust removal gun and the inner surface of the lamp cover is 10-20 cm.

6. The method for processing a linear light-emitting, wave-transparent lampshade according to claim 2, characterized in that: In steps S4-S5, the first heat transfer film layer and the second heat transfer film layer also include a release layer that facilitates separation from the first or second color film layer after printing, and a thin film base layer for bearing.

7. The method for processing a linear light-emitting, wave-transparent lampshade according to claim 2, characterized in that: In steps S4-S5, the heat transfer temperature is 170-230℃ and the printing time is 0.3-1.3s.

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