Co-extrusion special-shaped optical fiber luminous body, forming device and automobile interior and exterior trim parts

Abstract

The invention provides a co-extrusion special-shaped optical fiber illuminant, a forming device and automobile interior and exterior ornaments.The co-extrusion special-shaped optical fiber illuminant mainly comprises a first sheath, a second sheath and at least one set of optical fiber microbeam tube, the optical fiber microbeam tube is formed by extruding a plurality of optical fibers and an optical fiber protection layer, and the optical fiber protection layer wraps the optical fibers; and the optical fiber micro-beam tube, the first sheath and the second sheath are subjected to integral co-extrusion molding through a forming device. The LED lamp has the advantages that the color matching of the first sheath and the second sheath is controlled, the light emitting color of the product can be realized without replacing the LED light source, and one product can meet different light color requirements and light emitting brightness adjustment, so that the requirements of more light emitting surfaces are met.

Description

Technical Field

[0001] The present invention belongs to the technical field of luminous optical fibers, and specifically relates to a co-extruded special-shaped optical fiber luminous body, a molding device, and an automotive interior and exterior trim, which can achieve two or more luminous effects. Background Art

[0002] At present, automotive interior and exterior products are rapidly developing in the direction of luminescence. It is necessary to use luminous interior and exterior decoration as a carrier to improve the safety, aesthetics and intelligent interaction capabilities of the whole vehicle. The advantages of luminous fiber products such as uniformity of light emission, brightness, color consistency, and flexibility can meet the requirements of many interior and exterior luminous products. For some products with complex shapes and limited space, luminous fiber is the best technical choice. However, the luminous fiber products on the market are all extruded once, with only one color, and there is no mature dual-color / multi-color luminous products. The luminous color of luminous fiber products cannot be adjusted after lighting. The light color can only be changed after changing the color of the LED light source. In addition, the shape of the existing luminous fiber is only a circular cross-section, which cannot meet the requirements of a wider luminous surface. The product shape is single, and the luminous window of the luminous product using optical fiber as a luminous carrier is subject to the requirements of such optical fiber, resulting in too limited use scenarios for luminous fiber. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a co-extruded special-shaped optical fiber light-emitting body, a molding device and an automotive interior and exterior trim in response to the current status of the prior art, which can meet the needs of two or more light colors. At the same time, two or more extrusions can meet the needs of more application scenarios, and products of different shapes can be extruded according to different installation conditions.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a co-extruded special-shaped optical fiber luminous body, characterized in that it includes a first sheath, a second sheath and at least one group of optical fiber micro-bundle tubes, the optical fiber micro-bundle tubes are extruded from multiple optical fiber filaments and an optical fiber protective layer, the optical fiber protective layer covers the multiple optical fiber filaments, and the optical fiber micro-bundle tubes are co-extruded as a whole with the first sheath and the second sheath.

[0005] In the above-mentioned co-extruded special-shaped optical fiber light-emitting body, a plurality of optical fiber filaments are evenly arranged close to each other or twisted into a strand and arranged.

[0006] In the above-mentioned co-extruded special-shaped optical fiber luminous body, the optical fiber protective layer is one of POE material or nylon material. Here, POE material is a thermoplastic elastomer that realizes in-situ polymerization of ethylene and octene, with a low temperature resistance of 120°C, a milky white color, soft and light-transmitting, and plays a role in protecting the optical fiber and uniforming the light, while the main component of the nylon material is polyamide, a polymer composed of acyl and amine groups, with a temperature resistance of 250°C, a transparent color, soft and tough, and plays a role in protecting the optical fiber and transmitting light.

[0007] As one of the ways, in the above-mentioned co-extruded special-shaped optical fiber luminous body, the first sheath and the second sheath are different colors, and the optical fiber micro-tube and the first sheath and the second sheath are segmented double-color extruded. By setting different colors for the first sheath and the second sheath according to actual needs, the required colors can be customized as needed, so that one product can meet the needs of two or more light colors.

[0008] As another embodiment, in the above-mentioned co-extruded special-shaped optical fiber light-emitting body, the first sheath and the second sheath are of the same color.

[0009] In the above-mentioned co-extruded special-shaped optical fiber luminous body, the first sheath and the second sheath are made of one of POE, PC, PMMA, PET, PVC, and PP materials.

[0010] In the above-mentioned co-extruded special-shaped optical fiber luminous body, the heat-resistant temperature of the material of the optical fiber protective layer is greater than the heat-resistant temperature of the material of the first sheath and the second sheath.

[0011] In the above-mentioned co-extruded special-shaped optical fiber luminous body, a plurality of groups of optical fiber micro-bundle tubes are arranged in parallel or staggered in upper and lower directions in the first sheath and the second sheath.

[0012] This patent also provides a co-extruded special-shaped optical fiber light-emitting body molding device, which is characterized in that it includes a beam combining mechanism, a primary extrusion mechanism and a secondary extrusion mechanism. The primary extrusion mechanism and the secondary extrusion mechanism are arranged in front and back sections. Multiple optical fibers are formed into multiple groups of optical fiber micro-bundle tubes through the beam combining mechanism. The multiple groups of optical fiber micro-bundle tubes are extruded into a first sheath through the primary extrusion mechanism and then extruded into a second sheath through the secondary extrusion mechanism.

[0013] In the above-mentioned co-extruded special-shaped optical fiber light-emitting body molding device, it is characterized in that the material temperature of the second sheath extruded by the secondary extrusion mechanism is lower than the material temperature of the first sheath extruded by the primary extrusion mechanism.

[0014] In the above-mentioned co-extruded special-shaped optical fiber light-emitting body molding device, the beam combining mechanism includes a micro-beam tube extruder, which has an optical fiber wire input end and a micro-beam tube output end. The micro-beam tube extruder is divided into a positioning section and an extrusion section, wherein the positioning section is divided into a guide transition section and a core positioning section. The multiple optical fibers enter from the optical fiber wire input end and pass through the positioning section and the extrusion section to form an optical fiber micro-beam tube from the micro-beam tube output end.

[0015] In the above-mentioned co-extruded special-shaped optical fiber light-emitting body molding device, the primary extrusion mechanism also includes a positioning section and an extrusion section, and the primary extrusion mechanism has a micro-beam tube inlet and a first sheath outlet, wherein the positioning section is also divided into a guide transition portion and a core positioning portion, and the optical fiber micro-beam tube enters from the micro-beam tube inlet and passes through the positioning section and the extrusion section to be molded from the first sheath outlet into an optical fiber micro-beam tube with a first sheath.

[0016] In the above-mentioned co-extruded special-shaped optical fiber light-emitting body molding device, the secondary extrusion mechanism also includes a positioning section and an extrusion section, and the secondary extrusion mechanism has a first sheath inlet end and a second sheath outlet end, wherein the positioning section is also divided into a guide transition portion and a core positioning portion, and the optical fiber micro-bundle tube with the first sheath enters from the first sheath inlet end and passes through the positioning section and the extrusion section to form a finished optical fiber light-emitting body from the second sheath outlet end.

[0017] An automotive interior and exterior trim is characterized by being equipped with the above-mentioned special-shaped optical fiber luminous body. Since the special-shaped optical fiber luminous body is soft and light-transmissive, it can be installed on the automotive interior and exterior trim to emit light, and by matching the colors of the first sheath and the second sheath, not only the luminous color but also the luminous brightness can be controlled to meet more luminous surface requirements.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] 1. By controlling the color matching of the first sheath and the second sheath, the luminous color of the product can be achieved without changing the LED light source. A product can use different colors to meet the light color requirements of white light / amber / red light, etc.;

[0020] 2. By adjusting the thickness of the first and second sheaths, the brightness of the product can be controlled without the need for additional mold investment, LED replacement or circuit modification;

[0021] 3. Two or more extrusions can meet the needs of more application scenarios. Products of different shapes can be extruded according to different installation conditions to meet more luminous surface requirements;

[0022] 4. For different product shapes, you only need to replace the die. The die price is low, the replacement cost is low, and the product process is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the co-extruded special-shaped optical fiber luminous body;

[0024] Figure 2 This is a structural schematic diagram of the molding process of the co-extruded special-shaped optical fiber luminous body;

[0025] Figure 3It is a schematic diagram of the molding structure of the optical fiber micro beam tube;

[0026] Figure 4 This is a schematic diagram of the one-time extrusion molding structure of the co-extruded special-shaped optical fiber luminous body;

[0027] Figure 5 This is a schematic diagram of the secondary extrusion molding structure of the co-extruded special-shaped optical fiber luminous body;

[0028] Figure 6 It is a structural schematic diagram of the beam combining mechanism. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] In the figure, the first sheath 100; the second sheath 200; the optical fiber micro-tube 300; the optical fiber filament 301; the twisted optical fiber filament 301a; the optical fiber protective layer 302; the beam combining mechanism 400; the pay-off device 401; the tensioning wheel 402; the preheater 403; the automatic feeding device 404; the micro-tube extruder 405; the optical fiber filament inlet 405a; the micro-tube outlet 405b; the water tank 406; the traction wheel 407; the wire collection and arrangement device 408; the control panel 409; the positioning section 500; the extrusion section 600; the guide transition part 700; the core positioning part 800; the primary extrusion mechanism 900; the micro-tube inlet 900a; the first sheath outlet 900b; the secondary extrusion mechanism 1000; the first sheath inlet 1000a; the second sheath outlet 1000b.

[0031] like Figure 1 As shown, the co-extruded special-shaped optical fiber luminous body includes a first sheath 100, a second sheath 200 and at least one group of optical fiber micro-beam tubes 300, and in this patent, the optical fiber micro-beam tube 300 is co-extruded as a whole with the first sheath 100 and the second sheath 200, where the first sheath 100 and the second sheath 200 can be different colors or the same color, and the color can be customized according to the required light transmission requirements, so that by controlling the color matching of the first sheath 100 and the second sheath 200, the product light color can be achieved, where the first sheath 100 and the second sheath 200 can be one of POE, PC, PMMA, PET, PVC, PP or PUR materials, in this embodiment, the first sheath 100 and the second sheath 200 are both made of POE material, which is soft and light-transmissive, and plays a role in protecting the optical fiber and uniform light. The co-extruded special-shaped optical fiber luminous body can also be used after co-extrusion molding, and then inserted into other hand parts for injection molding or installed separately.

[0032] like Figure 3As shown, in order to manufacture the entire co-extruded special-shaped optical fiber light-emitting body, the present patent also provides a molding device, which mainly includes a beam combining mechanism 400, a primary extrusion mechanism 900 and a secondary extrusion mechanism 1000. The primary extrusion mechanism 900 and the secondary extrusion mechanism 1000 are arranged in front and back sections. A plurality of optical fiber filaments 301 are formed into a plurality of groups of optical fiber micro-bundle tubes 300 by the beam combining mechanism 400. The plurality of optical fiber micro-bundle tubes 300 are extruded into a first sheath 100 by the primary extrusion mechanism 900 and then extruded into a second sheath 200 by the secondary extrusion mechanism 1000.

[0033] Specifically, the optical fiber micro-bundle 300 is extruded from multiple optical fiber filaments 301 and an optical fiber protective layer 302, and the optical fiber protective layer 302 covers the multiple optical fiber filaments 301. In order to meet the light transmission requirement, the optical fiber protective layer 302 is one of POE material or nylon material. The POE material is a thermoplastic elastomer that realizes in-situ polymerization of ethylene and octene. It has a low temperature resistance of 120°C, a milky white color, is soft and light-transmitting, and plays a role in protecting the optical fiber and uniforming the light. The main component of the nylon material is polyamide, a polymer composed of acyl and amine groups, with a temperature resistance of 250°C, a transparent color, soft and tough, and plays a role in protecting the optical fiber and transmitting light. The diameter of the optical fiber filament 301 can be determined according to the overall brightness requirement. The higher the brightness requirement, the smaller the optical fiber filament. The smaller the diameter 301, the sheath and the optical fiber protective layer can be selected in combination in this patent. The selection requirement is that the temperature resistance of the optical fiber protective layer must be greater than the temperature resistance of the first sheath and the second sheath. This is because the first sheath 100 and the second sheath 200 are extruded later and need to prevent damage to the optical fiber protective layer. Therefore, nylon material is preferably used in this embodiment. This is because nylon material is not only resistant to high temperatures, but also can meet the soft and light-transmitting properties. In order to achieve a variety of luminous requirements, multiple groups of optical fiber micro-bundles 300 are arranged in parallel or staggered up and down in the first sheath 100 and the second sheath 200. Here, multiple groups of optical fiber micro-bundles 300 can be arranged in parallel at intervals to form one or more layers, or can be staggered up and down to form one or more layers.

[0034] In this patent, the optical fiber micro-bundle tube 300 is mainly completed by a beam combining mechanism 400, such as Figure 6As shown, the beam combining mechanism 400 includes a pay-off device 401, a tensioning wheel 402, a preheater 403, an automatic feeding device 404, a micro-tube extruder 405, a water tank 406, a traction wheel 407, a wire collection and arrangement device 408, and a control panel 409. Before the optical fiber 301 enters the micro-tube extruder 405 for positioning, the traction force and the rotation speed of the rotating mechanism are reasonably controlled. A rotating mechanism can be added to the pay-off device 401. Assuming that a single micro-tube contains 10 optical fibers 301, the pay-off rack can place 10 The whole set of pay-off device 401 can rotate around the axis. In order to ensure that the optical fiber micro-bundle tube 300 is positioned more accurately in the mold, multiple optical fiber strands 301 are evenly arranged close to each other or twisted into a strand, such as twisted into a strand to form a twisted optical fiber strand 301a; in the embodiment, the multiple optical fiber strands 301 are mainly twisted into a strand by the rotating mechanism when reaching the positioning plate to form a twisted optical fiber strand 301a, which has a basically consistent shape and is approximately circular, so as to ensure that the optical fiber bundle is positioned more accurately in the mold, so as to effectively reduce the pulling process. The jitter of the wire core and the movement of the inner core in the mold ensure the roundness of the optical fiber micro-tube 300 formed by the first combination of the optical fiber filaments 301. The roundness of the optical fiber micro-tube 300 has a key influence on the subsequent positioning of the micro-tube in the mold and its relative position in the sheath, which will eventually affect the appearance of the product and thus affect the luminous effect. In this patent, the micro-tube extruder 405 has an optical fiber inlet end 405a and a micro-tube outlet end 405b. The micro-tube extruder 405 is divided into a positioning section 500 and an extrusion section 600, wherein the positioning section 500 and the extrusion section 600 are respectively provided. The position section 500 is divided into a guide transition section 700 and a core positioning section 800, wherein the front half is the guide transition section 700 and the rear half is the core positioning section 800. By controlling the positioning gap value between the core of the optical fiber filament 301 and the mold, 0.1 mm is recommended in this embodiment and can be adjusted in accordance with the pulling speed and actual production. In this way, multiple optical fiber filaments 301 enter from the optical fiber filament inlet 405a and pass through the positioning section 500 and the extrusion section 600 to form an optical fiber micro-bundle tube 300 from the micro-bundle tube outlet 405b.

[0035] This patent can adopt one-time extrusion molding or two-time extrusion molding. This patent mainly adopts segmented two-color extrusion. Two-color extrusion refers to conveying two materials of different colors (the materials can be different) to the extrusion equipment through different flow channels to produce a product with two different colors. During the molding process, the two materials are formed into a whole by using a mold during the extrusion process. The two-color product is divided into two extrusion processes, front and back, with a total of two sets of dies, namely the first extrusion mechanism 900 and the second extrusion mechanism 1000. Different colors are provided by extruding different components twice, and the material temperature of the second sheath 200 extruded by the secondary extrusion mechanism 1000 is lower than the material temperature of the first sheath 100 extruded by the primary extrusion mechanism 900. In this embodiment, the temperature of the secondary extrusion material is 40-50°C lower than the primary extrusion material.

[0036] Specifically, if Figure 4 As shown, the primary extrusion mechanism 900 also includes a positioning section 500 and an extrusion section 600. The primary extrusion mechanism 900 has a micro-tube inlet 900a and a first sheath outlet 900b, wherein the positioning section 500 is also divided into a guide transition portion 700 and a core positioning portion 800. The optical fiber micro-tube 300 enters from the micro-tube inlet 900a and passes through the positioning section 500 and the extrusion section 600, and then is molded from the first sheath outlet 900b to form an optical fiber micro-tube 300 with a first sheath 100. The inner guide transition part 700 is mainly used to ensure the guiding position of the optical fiber micro-bundle 300, and to perform extrusion positioning through the core positioning part 800. Here, the first sheath 100 selects a colored plastic raw material component, such as adding a specific color paste to the POE material, and after being melted and plasticized by an extruder, it is co-extruded with the optical fiber micro-bundle 300 to form an optical fiber micro-bundle 300 with the color of the first sheath 100. The first sheath 100 can be extruded into various shapes, such as wide, round and other special shapes.

[0037] like Figure 5 As shown, after the first extrusion is completed, the second extrusion is performed, and the secondary extrusion mechanism 1000 also includes a positioning section 500 and an extrusion section 600. The secondary extrusion mechanism 1000 has a first sheath inlet end 1000a and a second sheath outlet end 1000b, wherein the positioning section 500 is also divided into a guide transition portion 700 and a core positioning portion 800. The optical fiber micro-bundle 300 with the first sheath 100 enters from the first sheath inlet end 1000a and is formed from the second sheath outlet end 1000b after passing through the positioning section 500 and the extrusion section 600. The second sheath 200 here selects a plastic raw material component with another color, and can also add a specific color paste according to actual needs. After being melted and plasticized by the extruder, the two materials converge under the action of the diverter shuttle and are cooled and solidified in the mold cavity to form a finished fiber optic light-emitting body with two colors. The second sheath 200 can also be extruded into various shapes, such as wide, round and other special shapes, so as to form special-shaped fiber optic light-emitting bodies, and different product shapes only need to replace the die, the die price is low, and the replacement cost is low.

[0038] The special-shaped optical fiber luminous body manufactured through the above process can be installed on the interior and exterior decoration of the car for use. By matching the colors of the first sheath 100 and the second sheath 200, the luminous color of the product can be achieved without changing the LED light source. One product can use different colors to meet the lighting needs of various interior and exterior decorations of the car.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A co-extruded special-shaped optical fiber luminous body, characterized in that: It includes a first sheath, a second sheath and at least one group of optical fiber micro-tubes. The optical fiber micro-tubes are extruded from multiple optical fibers and an optical fiber protective layer. The optical fiber protective layer covers the multiple optical fibers. The optical fiber micro-tubes are co-extruded with the first sheath and the second sheath.

2. A co-extruded special-shaped optical fiber light-emitting body as claimed in claim 1, characterized in that: Multiple optical fibers are evenly arranged close to each other or twisted into a strand.

3. A co-extruded special-shaped optical fiber light-emitting body as claimed in claim 1, characterized in that: The optical fiber protective layer is made of POE material or nylon material.

4. A co-extruded special-shaped optical fiber light-emitting body as claimed in claim 1, characterized in that: The first sheath and the second sheath are of different colors, and the optical fiber micro-bundle tube, the first sheath and the second sheath are formed by segmented two-color extrusion.

5. The co-extruded special-shaped optical fiber light-emitting body according to claim 1, characterized in that: The first sheath and the second sheath are of the same color.

6. A co-extruded special-shaped optical fiber light-emitting body as claimed in claim 4 or 5, characterized in that: The first sheath and the second sheath are made of one of POE, PC, PMMA, PET, PVC or PP materials.

7. A co-extruded special-shaped optical fiber light-emitting body as claimed in claim 6, characterized in that: The heat-resistant temperature of the material of the optical fiber protective layer is greater than the heat-resistant temperature of the material of the first sheath and the second sheath.

8. The co-extruded special-shaped optical fiber light-emitting body according to claim 1, characterized in that: A plurality of groups of optical fiber micro-bundle tubes are arranged in parallel or staggered in upper and lower directions in the first sheath and the second sheath.

9. A co-extruded special-shaped optical fiber light-emitting body forming device, characterized in that: It includes a beam combining mechanism, a primary extrusion mechanism and a secondary extrusion mechanism. The primary extrusion mechanism and the secondary extrusion mechanism are arranged in front and back sections. Multiple optical fibers are formed into multiple groups of optical fiber micro-bundle tubes through the beam combining mechanism. The multiple groups of optical fiber micro-bundle tubes are extruded into a first sheath through the primary extrusion mechanism and then extruded into a second sheath through the secondary extrusion mechanism.

10. A molding device for co-extruded special-shaped optical fiber light-emitting body as claimed in claim 9, characterized in that: The temperature of the material of the second sheath extruded by the secondary extrusion mechanism is lower than the temperature of the material of the first sheath extruded by the primary extrusion mechanism.

11. A molding device for co-extruded special-shaped optical fiber luminous body according to claim 9, characterized in that: The beam combining mechanism includes a micro-tube extruder, which has an optical fiber wire inlet and a micro-tube outlet. The micro-tube extruder is divided into a positioning section and an extrusion section, wherein the positioning section is divided into a guide transition section and a core positioning section. The multiple optical fibers enter from the optical fiber wire inlet and pass through the positioning section and the extrusion section to form an optical fiber micro-tube from the micro-tube outlet.

12. A co-extruded special-shaped optical fiber light-emitting body forming device as claimed in claim 9, characterized in that: The primary extrusion mechanism also includes a positioning section and an extrusion section, and has a micro-tube inlet and a first sheath outlet, wherein the positioning section is also divided into a guide transition portion and a core positioning portion. The optical fiber micro-tube enters from the micro-tube inlet and passes through the positioning section and the extrusion section to form an optical fiber micro-tube with a first sheath from the first sheath outlet.

13. A molding device for co-extruded special-shaped optical fiber light-emitting body as claimed in claim 12, characterized in that: The secondary extrusion mechanism also includes a positioning section and an extrusion section, and has a first sheath inlet and a second sheath outlet. The positioning section is also divided into a guide transition portion and a core positioning portion. The optical fiber micro-bundle tube with the first sheath enters from the first sheath inlet and passes through the positioning section and the extrusion section to form a finished optical fiber luminous body from the second sheath outlet.

14. An automotive interior and exterior trim, characterized in that: The special-shaped optical fiber light-emitting body as claimed in claim 7 is installed.

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