Integrated strip-shaped lamp and strip-shaped lamp double-color co-extrusion die

Abstract

The utility model relates to the technical field of strip-shaped lamps, in particular to an integrally-structured strip-shaped lamp, which can be freely bent, is high in production efficiency and saves the assembly process and labor cost of a modularized strip-shaped lamp, a transparent observation body can be used for a user to observe a cutting line on an FPC (Flexible Printed Circuit) board, and the strip-shaped lamp can be conveniently and rapidly cut only by cutting the strip-shaped lamp along the cutting line. The strip-shaped lamp can be slit according to the length of the strip-shaped lamp which is actually required to be used; besides, due to the fact that the lamp strip and the FPC board are tightly pressed in the containing cavity through the pressing blocks on the light guide body, and the two sides of the FPC board are not pressed, the two sides of the FPC board are not prone to being damaged even if the strip-shaped lamp is bent at will, and the yield of the strip-shaped lamp is guaranteed. The utility model further provides a strip-shaped lamp double-color co-extrusion mold, double-color co-extrusion is achieved, the strip-shaped lamp of an integrated structure is produced by combining the strip-shaped lamp with the light-transmitting partition plate, the lamp strip and the FPC board, the production efficiency is high, the quality is good, and the strip-shaped lamp can be freely bent.

Description

Technical Field

[0001] This utility model relates to the field of strip light technology, and in particular to a strip light with an integrated structure and a dual-color co-extrusion mold for the strip light. Background Technology

[0002] Strip lights are a type of lighting fixture, mainly composed of a lamp housing, LED strip, FPC board, and light guide plate. Currently, most strip lights on the market are modularly assembled. Modular strip lights require multiple components to be fastened together with screws and other fasteners, resulting in low production efficiency and difficulty in ensuring production quality.

[0003] Although existing technologies also include integrated injection molding of the lamp housing and light guide plate (for example, the Chinese patent application document filed by the applicant on January 18, 2023, with application number 202310060510.7, discloses a flexible linear lamp that can be bent freely), it is still necessary to stack the light strip and FPC board and assemble them in the inner cavity of the integrated lamp housing and light guide plate. Moreover, the stacked light strip and FPC board are prone to loosening in the inner cavity of the integrated lamp housing and light guide plate.

[0004] Furthermore, two-color / Twin-color coextrusion is a mature plastics processing technology that allows two different colors or materials of molten plastic to be extruded simultaneously in a single extrusion process and precisely bonded together within the mold or immediately adjacent to the mold exit to form multi-layered composite profiles or sheets with specific patterns, structures, or functions. Existing two-color coextrusion molds have diverse structural forms (e.g., existing patents CN105269786A, CN214294370U, and CN217495108U), but existing two-color coextrusion molds cannot produce strip lights. Moreover, Chinese patent application number 202310060510.7 discloses a freely bendable flexible strip light and its manufacturing process, but it also cannot produce a strip light with an integrated structure. Utility Model Content

[0005] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a strip light with an integrated structure and a dual-color co-extrusion mold for the strip light.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A strip light with an integrated structure includes a light guide body, a light strip, an FPC board, a transparent viewing body, and two light-shielding side plates. The light guide body is hollow, and the light-shielding side plates have an L-shaped cross-section. The inner walls of the vertical portions of the two light-shielding side plates are fixedly connected to the two sides of the light guide body, and the horizontal portions of the two light-shielding side plates are fixedly connected to the two sides of the transparent viewing body. The light guide body, the transparent viewing body, and the two light-shielding side plates form a cavity. The FPC board is fixedly connected to the side wall of the cavity near the transparent viewing body. The light strip is electrically connected to one side of the middle portion of the FPC board. The light strip and the FPC board are stacked and housed in the cavity. The transparent viewing body is located on the other side of the middle portion of the FPC board. A pressing block protrudes from the middle of the inner wall of the light guide body and extends into the cavity. The pressing block presses the light strip tightly. The cutting line on the FPC board is located at the transparent viewing body.

[0008] Furthermore, the integrated strip light also includes a light-transmitting partition sandwiched between the pressure block and the LED chip surface of the light strip.

[0009] Furthermore, the feature is that: both the light guide body and the transparent observation body are diffused silicone bodies; the light-shielding side plate is a light-shielding silicone body.

[0010] This utility model also provides a dual-color co-extrusion mold for a strip light, which can produce the aforementioned one-piece strip light. It includes a fixed base, an inner mold core, an outer mold core, and a locking plate. A central hole is formed in the thickness direction at the center of the fixed base. The inner end of the inner mold core extends into the central hole. A light-guiding material flow channel is formed between the outer wall of the inner mold core and the inner wall of the central hole. A contouring punch and a material passage located below the contouring punch are provided at the inner end of the inner mold core. The contouring punch and the material passage are spaced apart. An injection hole is formed in the center of the outer mold core. The locking plate is used to lock the inner mold core to the discharge side of the fixed base. A forming hole is formed in the center of the locking plate. The forming hole, injection hole, and central hole are coaxially arranged. The contouring punch and the material passage sequentially pass through the central hole, injection hole, and forming hole. A light-guiding material flow channel is formed between the outer wall of the contouring punch, the outer wall of the material passage, and the inner wall of the injection hole. The light-guiding injection molding channel and the transparent observation injection molding channel are connected to the light-guiding material channel and the transparent observation injection molding channel, respectively. Two light-shielding injection molding channels are formed between the outer wall of the contouring punch, the outer wall of the material passage, and the inner wall of the molding hole. The light-guiding injection molding channel and the transparent observation injection molding channel are connected to the light-shielding injection molding channels. A light-shielding material guide channel is formed between the inner wall of the locking plate and the outer mold core, which is connected to the two light-shielding injection molding channels. The fixing seat is provided with a light-shielding material guide channel connected to the light-shielding material guide channel. The inner mold core has an axial through hole, which is connected to the material passage in a straight line. The light-guiding injection molding channel and the transparent observation injection molding channel are spaced apart, and the two light-shielding injection molding channels are located on both sides of the light-guiding injection molding channel and the transparent observation injection molding channel, respectively.

[0011] Furthermore, the central hole is a conical hole, the inner end of the inner mold core is conical, the contour punch and the material passage are both located on the smallest diameter end face of the inner mold core, and the inner wall of the central hole and the outer wall of the inner mold core form a conical material flow channel for guiding light.

[0012] Furthermore, a threaded ring is provided at the outer end of the inner mold core.

[0013] Furthermore, the fixing seat, outer mold core, and locking plate are locked together by fasteners.

[0014] Furthermore, the outer mold core has a recessed material storage groove and a material passage hole formed by the recessed bottom wall of the material storage groove on one side near the locking plate. The material passage hole is connected to the light-shielding material flow channel. The material storage groove is U-shaped and partially surrounds the injection hole. The inner side of the locking plate covers the opening of the material storage groove to form a light-shielding material guide channel.

[0015] Furthermore, the material passage holes are spaced below the injection holes, and two guide blocks are protruding from the bottom wall of the material storage tank. The two guide blocks are symmetrically arranged between the material passage holes and the injection holes.

[0016] Furthermore, a positioning post protrudes from the side of the outer mold core near the locking plate, and the locking plate has positioning holes that match the protrusion and concavity of the positioning post.

[0017] Furthermore, a set screw is threaded through the locking plate, and the inner end face of the set screw is used to abut against the side of the outer mold core near the locking plate.

[0018] Furthermore, the outer mold core is provided with a foolproof groove.

[0019] Furthermore, the light-shielding material flow channel includes a light-shielding material hole intersecting with the central hole and an annular hole coaxially arranged with and surrounding the central hole, with the light-shielding material hole and the annular hole communicating with each other.

[0020] The beneficial effects of this utility model are as follows: The strip light of this utility model has an integrated structure and can be freely bent, resulting in high production efficiency and saving on the assembly process and labor costs of modular strip lights. The transparent viewing body allows users to observe the cutting lines on the FPC board. The strip light can be cut according to the actual required length by simply cutting along the cutting lines. In addition, since the light strip and FPC board are pressed into the accommodating cavity by the pressure block on the light guide body, and the two sides of the FPC board are not pressed, even if the strip light is bent arbitrarily, it is not easy to damage the two sides of the FPC board, thus ensuring the yield of the strip light. The dual-color co-extrusion mold of this utility model realizes the dual-color co-extrusion of light guide material and light shielding material and combines them with light-transmitting partition, light strip and FPC board to produce a strip light with an integrated structure, resulting in high production efficiency, good quality and the ability to be freely bent. Attached Figure Description

[0021] Figure 1This is a cross-sectional view of the integrated structure of the strip light of this utility model.

[0022] Figure 2 This is a three-dimensional structural diagram of the dual-color co-extrusion mold for the strip light of this utility model, which includes a light-transmitting partition, a light strip, and an FPC board after stacking.

[0023] Figure 3 This is a three-dimensional structural diagram of the dual-color co-extrusion mold for the strip light of this utility model, which has a light-transmitting partition, a light strip, and an FPC board after being stacked.

[0024] Figure 4 This is a three-dimensional structural diagram of the dual-color co-extrusion mold for the strip light of this utility model, which has a light-transmitting partition, a light strip and an FPC board after being stacked.

[0025] Figure 5 This is an exploded structural diagram of the dual-color co-extrusion mold for the strip light of this utility model.

[0026] Figure 6 This is an exploded structural diagram of the dual-color co-extrusion mold for the strip light of this utility model from another perspective.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Fixed base; 2. Inner mold core; 3. Outer mold core; 4. Locking plate; 5. Center hole; 6. Contouring punch; 7. Material passage; 8. Injection hole; 9. Forming hole; 10. Light-shielding material flow channel; 11. Through hole; 12. Threaded ring; 13. Material storage tank; 14. Material passage hole; 15. Guide block; 16. Positioning pin; 17. Positioning hole; 18. Ejector screw; 19. Anti-misalignment groove; 20. Light-shielding material hole; 21. Annular hole; 22. Anti-misalignment cut surface; 23. Locking hole; 24. Locking fastener; 25. FPC board; 26. LED strip; 27. Light guide body; 28. Light-shielding side plate; 29. ​​Transparent observation body; 30. Light-transmitting partition; 31. Pressure block. Detailed Implementation

[0029] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0030] like Figures 1 to 6As shown, this utility model provides an integrated strip light, which is manufactured using a two-color co-extrusion molding process with a two-color co-extrusion mold. It includes a light guide body 27, a light strip 26, an FPC board 25, a transparent observation body 29, and two light-shielding side plates 28. The light guide body 27 is hollow, and the light-shielding side plates 28 have an L-shaped cross-section. The vertical inner walls of the two light-shielding side plates 28 are fixedly connected to the two sides of the light guide body 27, and the horizontal parts of the two light-shielding side plates 28 are fixedly connected to the two sides of the transparent observation body 29. The light guide body 27, the transparent observation body 29, and the two light-shielding side plates 28 are integrated into a single unit. The plate 28 forms a receiving cavity. The FPC plate 25 is fixedly connected to one side wall of the receiving cavity near the transparent observation body 29. The light strip 26 is electrically connected to one side of the middle of the FPC plate 25. The light strip 26 and the FPC plate 25 are stacked and received in the receiving cavity. The transparent observation body 29 is located on the other side of the middle of the FPC plate 25. The inner wall of the light guide body 27 is provided with a pressing block 31 that extends into the receiving cavity. The pressing block 31 presses the light strip 26 tightly. The cutting line on the FPC plate 25 is located at the transparent observation body 29. Specifically, both the light guide body 27 and the transparent observation body 29 are diffuser silicone bodies. The light-shielding side plate 28 is a light-shielding silicone body. The strip light of this invention has an integrated structure and can be bent freely, resulting in high production efficiency and saving on the assembly process and labor costs of modular strip lights. The transparent viewing body 29 allows users to observe the cutting lines on the FPC board 25. The strip light can be cut along the cutting lines, and can be cut according to the actual length of the strip light needed. In addition, since the light strip 26 and the FPC board 25 are pressed into the accommodating cavity by the pressure block 31 on the light guide body 27, and the two sides of the FPC board 25 are not pressed, even if the strip light is bent arbitrarily, it is not easy to damage the two sides of the FPC board 25, thus ensuring the yield of the strip light.

[0031] In this embodiment, the integrated strip light also includes a light-transmitting partition 30, which is sandwiched between the pressure block 31 and the LED surface of the light strip 26. Specifically, the light-transmitting partition 30 is a PET board. The light-transmitting partition 30 separates the pressure block 31 on the light guide body 27 from the LED surface of the light strip 26, not only filling the gap between the pressure block 31 and the LED surface of the light strip 26, but also preventing the pressure block 31 on the light guide body 27 from directly contacting the LED surface, which helps to improve color difference and enhance the color of the light.

[0032] This utility model also provides a dual-color co-extrusion mold for a strip light, which can produce the aforementioned one-piece strip light. It includes a fixed base 1, an inner mold core 2, an outer mold core 3, and a locking plate 4. A central hole 5 is formed in the thickness direction at the center of the fixed base 1. The inner end of the inner mold core 2 extends into the central hole 5. A light-guiding material flow channel is formed between the outer wall of the inner mold core 2 and the inner wall of the central hole 5. A contouring punch 6 and a material passage 7 located below the contouring punch 6 are provided at the inner end of the inner mold core 2. The contouring punch 6 and the material passage 7 are spaced apart. An injection hole 8 is formed in the center of the outer mold core 3. The locking plate 4 is used to lock the inner mold core 2 to the discharge side of the fixed base 1. A forming hole 9 is formed in the center of the locking plate 4. The forming hole 9, the injection hole 8, and the central hole 5 are coaxially arranged. The contouring punch 6 and the material passage 7 sequentially pass through the central hole 5, the injection hole 8, and the forming hole 9. The outer wall of the contouring punch 6, the outer wall of the material passage 7, and the injection hole 8 are connected. A light-guiding injection molding channel and a transparent observation injection molding channel are formed between the inner walls of the plastic hole 8. The light-guiding material channel is connected to the light-guiding injection molding channel and the transparent observation injection molding channel respectively. Two light-shielding injection molding channels are formed between the outer wall of the contouring punch 6, the outer wall of the material passage 7, and the inner wall of the molding hole 9. The light-guiding injection molding channel and the transparent observation injection molding channel are connected to the light-shielding injection molding channel respectively. A light-shielding material guide channel is formed between the inner wall of the locking plate 4 and the outer mold core 3, which is connected to the two light-shielding injection molding channels. The fixing seat 1 is provided with a light-shielding material channel 10 connected to the light-shielding material guide channel. The inner mold core 2 has an axial through hole 11, which is connected to the material passage 7 in a straight line. The light-guiding injection molding channel and the transparent observation injection molding channel are spaced apart. The two light-shielding injection molding channels are located on both sides of the light-guiding injection molding channel and the transparent observation injection molding channel respectively.

[0033] In practical applications, the light-transmitting partition 30, the light strip 26, and the FPC board 25 are stacked sequentially and pass through the through hole 11 and the material passage 7. The light guide material enters the light guide injection molding channel and the transparent observation injection molding channel through the light guide material supply channel. The light guide material in the light guide injection molding channel and the transparent observation injection molding channel is injection molded onto the upper and lower sides of the stacked light-transmitting partition 30, the light strip 26, and the FPC board 25 to form a light guide body 27 with a pressure block 31 and a transparent observation body 29. The pressure block 31 presses the light-transmitting partition 30 tightly, and the light-shielding material enters the light-shielding material guide channel through the light-shielding material supply channel 10. The light-shielding material in the light-shielding material guide channel is guided to the two light-shielding injection molding channels. Inside the flow channel, the light-shielding material in the two light-shielding injection molding flow channels is injection molded on both sides of the molded light guide body 27, light-transmitting partition 30, light strip 26, FPC plate 25 and transparent observation body 29 to form two light-shielding side plates 28. As the light-transmitting partition 30, light strip 26 and FPC plate 25 move and the light guide material and light-shielding material are cured and formed, the contouring punch 6 and the material passage 7 respectively form the hollow hole of the light guide body 27 and the receiving cavity on the strip lamp (the contouring punch 6 will make the light guide body 27 form a hollow hole, and the material passage 7 will make the light guide body 27, transparent observation body 29 and the two light-shielding side plates 28 form a receiving cavity) to produce the strip lamp. The present invention utilizes a dual-color co-extrusion mold for strip lights to achieve dual-color co-extrusion of light-guiding material and light-shielding material, and combines them with a light-transmitting partition 30, a light strip 26 and an FPC board 25 to produce a strip light with an integrated structure. This results in high production efficiency, good quality, and the strip light can be freely bent.

[0034] Specifically, the light-guiding material is a diffusing silicone material, and the light-shielding material is a light-shielding silicone material.

[0035] In this embodiment, the central hole 5 is a conical hole, the inner end of the inner mold core 2 is conical, the contour punch 6 and the material passage 7 are both located on the smallest diameter end face of the inner mold core 2, and the inner wall of the central hole 5 and the outer wall of the inner mold core 2 form a conical light-guiding material flow channel. This structural design facilitates the smooth flow of light-guiding material along the conical light-guiding material flow channel into the light-guiding injection molding channel and the transparent observation injection molding channel.

[0036] In this embodiment, a threaded ring 12 is provided at the outer end of the inner mold core 2; specifically, the thread of the threaded ring 12 is located on the outer side wall of the threaded ring 12. The threaded ring 12 is threadedly connected to the external structure to facilitate the installation of the inner mold core 2 on the external structure.

[0037] In this embodiment, the fixing base 1, the outer mold core 3, and the locking plate 4 are fastened together by a locking fastener 24. Specifically, the locking fastener 24 is a locking thread. This structural design facilitates the assembly and disassembly of the fixing base 1, the outer mold core 3, and the locking plate 4, and ensures a secure assembly of the three components.

[0038] In this embodiment, the outer mold core 3 has a recessed material storage groove 13 and a material passage hole 14 formed by the recessed bottom wall of the material storage groove 13 on the side near the locking plate 4. The material passage hole 14 is connected to the light-shielding material flow channel 10. The material storage groove 13 is U-shaped and partially surrounds the injection hole 8. The inner side of the locking plate 4 covers the opening of the material storage groove 13 to form a light-shielding material guide channel. This structural design allows the light-shielding material to be injection molded on both sides of the molded light guide body 27, light-transmitting partition 30, light strip 26 and FPC plate 25 to form two light-shielding side plates 28, and facilitates the processing and molding of the material storage groove 13 and the material passage hole 14.

[0039] Specifically, an annular first sealing structure is provided between the outer mold core 3 and the locking plate 4, and the material storage groove 13 is located within the first sealing structure; preferably, the first sealing structure is a sealing ring. The gap between the outer mold core 3 and the locking plate 4 is sealed by the first sealing structure, which provides good sealing performance and avoids material leakage.

[0040] In this embodiment, the material passage holes 14 are spaced below the injection holes 8, and two guide blocks 15 are protruding from the bottom wall of the storage tank 13. The two guide blocks 15 are symmetrically arranged between the material passage holes 14 and the injection holes 8. When the light-shielding material enters the storage tank 13, it is guided by the two guide blocks 15, causing the light-shielding material to flow in two directions. This allows the light-shielding material to be injection molded into two light-shielding side plates 28 on both sides of the molded light guide body 27, light-transmitting partition 30, light strip 26, and FPC plate 25.

[0041] In this embodiment, a positioning post 16 protrudes from the side of the outer mold core 3 near the locking plate 4, and the locking plate 4 has a positioning hole 17 that matches the protrusion and concavity of the positioning post 16. When the outer mold core 3 and the locking plate 4 are assembled together, the positioning post 16 is inserted into the positioning hole 17 to realize the positioning assembly of the outer mold core 3 and the locking plate 4, thereby improving the positional accuracy and stability of both.

[0042] In this embodiment, a set screw 18 is threaded through the locking plate 4, and the inner end face of the set screw 18 is used to abut against the side of the outer mold core 3 near the locking plate 4. When it is necessary to separate the locking plate 4 from the outer mold core 3, the set screw 18 is screwed, causing the set screw 18 to move relative to the locking plate 4 and closer to the outer mold core 3, thereby causing the set screw 18 to abut against the outer mold core 3, and thus causing the locking plate 4 and the outer mold core 3 to gradually separate.

[0043] In this embodiment, the outer mold core 3 is provided with a foolproof groove 19. The design of the foolproof groove 19 plays a foolproof role in the assembly of the outer mold core 3, preventing the outer mold core 3 from being installed backwards.

[0044] In this embodiment, the light-shielding material flow channel 10 includes a light-shielding material supply hole 20 intersecting with the central hole 5 and an annular hole 21 coaxially arranged with and surrounding the central hole 5. The light-shielding material supply hole 20 and the annular hole 21 are connected, and the annular hole 21 is correspondingly connected with the material passage hole 14. Specifically, the central hole 5 is recessed from one side of the fixed base 1, and the annular hole 21 is recessed from the other side of the fixed base 1. The side of the outer mold core 3 near the fixed base 1 covers the annular hole 21. This structural design facilitates the processing and molding of the light-shielding material flow channel 10. In actual operation, the light-shielding material enters the annular hole 21 from the light-shielding material supply hole 20, and the light-shielding material in the annular hole 21 enters the light-shielding material guide channel.

[0045] Specifically, an annular second sealing structure is provided between the outer mold core 3 and the fixed base 1, with the annular hole 21 located within the second sealing structure; preferably, the second sealing structure is a sealing ring. The gap between the outer mold core 3 and the fixed base 1 is sealed by the second sealing structure, providing good sealing performance and avoiding material leakage.

[0046] Specifically, the inner wall of the light-shielding material hole 20 is provided with an internal thread, which is connected to the external light-shielding material tube by a thread, so as to facilitate the assembly and disassembly of the fixing seat 1 and the light-shielding material tube.

[0047] Specifically, the fixing seat 1 has a locking hole 23, which is used for the locking bolt to pass through, so as to lock the fixing seat 1 to the external structure.

[0048] Specifically, both the periphery of the locking plate 4 and the periphery of the outer mold core 3 are provided with anti-mistake cutting surfaces 22. The anti-mistake cutting surfaces 22 are provided to prevent the locking plate 4 and the outer mold core 3 from being assembled backwards.

[0049] All technical features in this embodiment can be freely combined according to actual needs.

[0050] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A strip light with an integrated structure, characterized in that: The light guide includes a light guide body, a light strip, an FPC board, a transparent observation body, and two light-shielding side plates. The light guide body is hollow, and the light-shielding side plates have an L-shaped cross-section. The vertical inner walls of the two light-shielding side plates are fixedly connected to the two sides of the light guide body, and the horizontal parts of the two light-shielding side plates are fixedly connected to the two sides of the transparent observation body. The light guide body, the transparent observation body, and the two light-shielding side plates form a cavity. The FPC board is fixedly connected to the side wall of the cavity near the transparent observation body. The light strip is electrically connected to one side of the middle of the FPC board. The light strip and the FPC board are stacked and housed in the cavity. The transparent observation body is located on the other side of the middle of the FPC board. A pressure block protrudes from the middle of the inner wall of the light guide body and extends into the cavity. The pressure block presses the light strip tightly. The cutting line on the FPC board is located at the transparent observation body.

2. The strip light with an integrated structure according to claim 1, characterized in that: The integrated strip light also includes a light-transmitting partition sandwiched between the pressure block and the LED beads of the light strip.

3. A strip light with an integrated structure according to claim 1 or 2, characterized in that: Both the light guide body and the transparent observation body are made of diffused silicone; the light-shielding side plate is made of light-shielding silicone.

4. A dual-color co-extrusion mold for a strip light, capable of producing a strip light with an integral structure as described in any one of claims 1 to 3, characterized in that: The device includes a fixed base, an inner mold core, an outer mold core, and a locking plate. The fixed base has a central hole in the thickness direction. The inner end of the inner mold core extends into the central hole. A light-guiding material flow channel is formed between the outer wall of the inner mold core and the inner wall of the central hole. A contouring punch and a material passage located below the contouring punch are provided at the inner end of the inner mold core. The contouring punch and the material passage are spaced apart. An injection hole is formed in the center of the outer mold core. The locking plate is used to lock the inner mold core to the material outlet side of the fixed base. A forming hole is formed in the center of the locking plate. The forming hole, injection hole, and central hole are coaxially arranged. The contouring punch and the material passage sequentially pass through the central hole, injection hole, and forming hole. A light-guiding injection molding flow channel and a transparent observation injection molding flow channel are formed between the outer wall of the contouring punch, the outer wall of the material passage, and the inner wall of the injection hole. The light-guiding material flow channel is connected to the light-guiding injection molding flow channel and the transparent observation injection molding flow channel respectively. Two light-shielding injection molding flow channels are formed between the outer wall of the contouring punch, the outer wall of the material passage, and the inner wall of the molding hole. The light-guiding injection molding flow channel and the transparent observation injection molding flow channel are connected to the light-shielding injection molding flow channel respectively. The inner wall of the locking plate and the outer mold core form a light-shielding material guide channel that is connected to the two light-shielding injection molding flow channels. The fixing seat is provided with a light-shielding material flow channel that is connected to the light-shielding material guide channel. The inner mold core has an axial through hole that is connected to the material passage in a straight line. The light-guiding injection molding flow channel and the transparent observation injection molding flow channel are spaced apart. The two light-shielding injection molding flow channels are located on both sides of the light-guiding injection molding flow channel and the transparent observation injection molding flow channel respectively.

5. The dual-color co-extrusion mold for a strip light according to claim 4, characterized in that: The center hole is a conical hole, and the inner end of the inner mold core is conical. The contour punch and the material passage are both located on the smallest diameter end face of the inner mold core. The inner wall of the center hole and the outer wall of the inner mold core form a conical material flow channel for guiding light.

6. The dual-color co-extrusion mold for a strip light according to claim 4, characterized in that: The outer mold core has a recessed material storage groove and a material passage hole formed by the recessed bottom wall of the material storage groove on one side near the locking plate. The material passage hole is connected to the light-shielding material flow channel. The material storage groove is U-shaped and partially surrounds the injection hole. The inner side of the locking plate covers the opening of the material storage groove to form a light-shielding material guide channel.

7. The dual-color co-extrusion mold for a strip light according to claim 6, characterized in that: The material passage holes are positioned below the injection holes, and two guide blocks protrude from the bottom wall of the material storage tank. The two guide blocks are symmetrically arranged between the material passage holes and the injection holes.

8. The dual-color co-extrusion mold for a strip light according to claim 4, characterized in that: The outer mold core has a protruding positioning post on the side near the locking plate, and the locking plate has positioning holes that match the protrusion and concavity of the positioning post.

9. A dual-color co-extrusion mold for a strip light according to claim 8, characterized in that: The locking plate is threaded with a set screw, and the inner end face of the set screw is used to abut against the side of the outer mold core near the locking plate.

10. A dual-color co-extrusion mold for a strip light according to claim 4, characterized in that: The light-shielding material flow channel includes a light-shielding material hole that intersects with the central hole and an annular hole that is coaxial with and surrounds the central hole, with the light-shielding material hole and the annular hole communicating with each other.

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