Optical fiber plug and manufacturing process thereof

Abstract

The invention relates to the technical field of optical fiber plugs, in particular to an optical fiber plug and a manufacturing process thereof.The optical fiber plug comprises a connecting part allowing an optical fiber adapter to be inserted therein, the optical fiber plug further comprises a double-color part arranged at the tail end of the connecting part, the double-color part comprises an observation end and a shielding end, the observation end is transparent, and the shielding end is non-transparent; the observation end is provided with an observation port; the color changing structure is arranged in the observation end, and the color changing structure comprises a color changing plate in sliding connection and an abutting pin in linkage with the color changing plate; the color-changing baffle is arranged in the observation opening, the color-changing baffle comprises a shielding part located on one side of the shielding end and an observation part located on one side of the observation end, and the color-changing baffle and the shielding part coincide in the initial state; when the optical fiber adapter is not inserted into the connecting part, the shielding parts of the color-changing plate and the color-changing baffle plate coincide, and the color-changing plate is shielded. When the optical fiber adapter is inserted into the connecting part, the observation part and the shielding part are arranged, so that the effect of visually observing whether the optical fiber is installed and connected in place or not is achieved.

Description

Technical Field

[0001] This invention relates to the field of fiber optic connector technology, and in particular to a fiber optic connector and its manufacturing process. Background Technology

[0002] With the rapid development of information technology, high-density fiber optic communication networks have become the core infrastructure for data centers, 5G base stations, fiber-to-the-home (FTTH), and large enterprise networks. In these application scenarios, high-density fiber distribution frames (HD-MUs) are widely used to maximize the use of limited rack and panel space.

[0003] A typical characteristic of high-density fiber optic patch panels (HD-MUs) is the dense arrangement of dozens or even hundreds of fiber optic adapter ports on a single module or panel. When installing fiber optic cables, operators primarily rely on tactile and audible feedback—hearing a click or feeling a sudden increase in resistance—to determine if the plugs are securely locked. When a large number of fiber optic patch cords are densely inserted, the connection points between the plugs and adapters are severely obstructed by adjacent cables and plugs. Operators cannot directly observe whether individual plugs are properly inserted, nor can they see the tiny mating indicators that may exist on the plug itself. This easily leads to a "false lock" phenomenon—the plug appears to be inserted, but is not actually fully mated. This poor connection introduces significant insertion and return losses, resulting in signal quality degradation or even communication interruption, and the fault location is difficult to pinpoint quickly. Summary of the Invention

[0004] Therefore, the purpose of this invention is to overcome the problem in the prior art that it is impossible to accurately determine whether the fiber optic plug is installed properly through damped tactile or auditory feedback when installing high-density fiber optic plugs. Specifically, it provides a fiber optic plug that can judge the installation status of the fiber optic plug through visual color change. When inserting, the exact position of the fiber optic plug is confirmed by the movement of the color-changing plate and the visual color change. This improves the accuracy of fiber optic plug insertion when inserting multi-density fiber optic plugs.

[0005] To address the aforementioned technical problems, the present invention provides an optical fiber plug, including a connector for inserting an optical fiber adapter, and the optical fiber plug further includes: A two-color section is provided at the end of the connecting part. The two-color section includes an observation end and a blocking end. The observation end is transparent and the blocking end is opaque. The observation end has an observation port. A color-changing structure is disposed within the observation end, the color-changing structure comprising a color-changing plate that is slidably connected and an abutment pin that is linked to the color-changing plate; A color-changing baffle is disposed inside the observation port. The color-changing baffle includes a shielding part located on one side of the shielding end and an observation part located on one side of the observation end. In the initial state, the color-changing baffle and the shielding part overlap. When the fiber optic adapter is not inserted into the connection part, the shielding parts of the color-changing plate and the color-changing baffle overlap, and the color-changing plate is blocked; when the fiber optic adapter is inserted into the connection part, the fiber optic adapter pushes the color-changing plate to slide into the field of view of the observation part, and the color-changing plate is observed in the observation part.

[0006] In one embodiment of the present invention, the surface areas of both the shielding portion and the observation portion of the color-changing baffle are larger than the surface area of ​​the color-changing baffle. When the abutment pin extends or retracts, the observation portion of the color-changing baffle moves from being shielded by the shielding portion to being observed.

[0007] In one embodiment of the present invention, a prism is embedded in the observation part of the color-changing baffle, and the observation angle of the prism is 150°. During observation, the color-changing plate can be observed from any angle within the 150° fan-shaped observation area formed by the prism.

[0008] In one embodiment of the present invention, the dual-color part is provided with a limiting groove that matches the shape of the optical fiber adapter, the color-changing structure is disposed at the bottom of the limiting groove, and a guide surface is provided at the opening of the limiting groove.

[0009] In one embodiment of the present invention, a magnetic guide plate is provided on the surface of the guide surface, and there is an adsorption force between the magnetic guide plate and the end metal of the optical fiber adapter.

[0010] In one embodiment of the present invention, a sliding groove is provided in the limiting groove, the abutment pin slides in the sliding groove, and a reset spring is provided at the bottom of the sliding groove. The elastic force of the reset spring is less than or equal to the frictional force between the optical fiber adapter and the inner wall of the limiting groove.

[0011] A manufacturing process for an optical fiber connector includes: S1: Inject the first-color engineering plastic into the first mold cavity, wherein the first-color engineering plastic is black; S2: Open the mold, rotate the male mold core with the black base by 180 degrees, and position it in the second mold cavity. At this time, the black base is the blocking end. S3: The first mold cavity is purged with an ionized gas torch; S4: After purging, inject the second color engineering plastic into the second mold cavity. The second color engineering plastic is transparent and drives the first mold cavity and the second mold cavity to close, so that it fuses with the bonding surface of the black substrate under high temperature and high pressure to form a transparent observation end, thereby forming an integrated two-color part. S5: Anneal the integrated two-color body obtained in S4; S6: Connecting part and threaded fixing part for splicing and installing fiber optic plugs; S7: Repeat S1 to S5, change the mold cavity to a plate material, and injection mold black and transparent color-changing baffles; S8: An observation port is formed by cutting at the observation end. The observation port is connected to the connecting part. A color-changing baffle is fixed inside the observation port. The shielding part of the color-changing baffle is close to and abuts against the shielding end for fixation. The observation part of the color-changing baffle is close to and abuts against the observation end for fixation.

[0012] In one embodiment of the present invention, when the black substrate mold core rotates, its rotation positioning accuracy is ±0.02nm.

[0013] In one embodiment of the present invention, the second colored engineering plastic is filled using a multi-end injection speed, wherein the filling rate of the multi-end injection speed changes from low speed to medium speed to low speed, and the pressure during holding pressure matches and remains constant with the maximum value of the filling rate.

[0014] In one embodiment of the present invention, the pressure holding time is 8-15 seconds.

[0015] Compared with the prior art, the above-described technical solution of the present invention has the following advantages: The fiber optic plug of this invention, by setting a transparent part and a shieldable part on the fiber optic plug, allows for the judgment of the fiber optic plug insertion status by visually observing the color change during installation. Compared with conventional damping and sensor judgment, the color change seen by the naked eye can be more intuitively reflected in the installation structure of multi-layer fiber optic plugs, achieving the intuitive effect that the fiber optic plug has reached the designated position and is inserted when the observable color is fully visible. This improves the accuracy of installing fiber optic plugs on high-density fiber optic racks and confirming whether the fiber optic plug is inserted. The fiber optic plug features a dual-color section consisting of a transparent observation end and an opaque shielding end. A color-changing baffle is installed at the observation end, with the connection between the baffle and the shielding end using the same color. The other end of the baffle is transparent. Initially, the shielding part of the baffle blocks the operator's view. The color-changing structure behind the shielding part hides the baffle. When the fiber optic plug is inserted, the baffle moves to the observation end. Since the observation end is transparent, the color of the baffle can be observed by the operator. When the operator can fully see the baffle, the fiber optic plug is correctly inserted, allowing visual judgment of whether the plug is fully inserted. Attached Figure Description

[0016] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the structure of an optical fiber plug in a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the color-changing structure in a preferred embodiment of the present invention; Figure 3 This is a side view of an optical fiber plug according to a preferred embodiment of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a cross-sectional schematic diagram of an optical fiber plug according to a preferred embodiment of the present invention; Figure 6 for Figure 5 Enlarged view of point B in the middle; Figure 7 This is a flowchart illustrating the manufacturing process of an optical fiber connector according to the present invention.

[0018] Explanation of reference numerals on the accompanying drawings: 1. Connecting part; 2. Two-color section; 21. Observation end; 22. Obstruction end; 23. Limiting groove; 24. Guide surface; 25. Sliding groove; 3. Color-changing structure; 31. Color-changing plate; 32. Abutting pin; 33. Color-changing baffle; 331. Shielding part; 332. Observation part; D1, direction of movement of the color-changing plate; D2, direction of movement of the abutment pin. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0020] The fiber optic plug of this invention has the advantage of quickly detecting whether the fiber optic plug is fully installed, compared to existing fiber optic plugs installed by damping or sensor detection. In high-density fiber optic mounting racks, the use of sensors or damping to detect whether the fiber optic plug is installed correctly is prone to errors. The lack of a direct detection method will lead to an increased failure rate of the fiber optic plug. The fiber optic plug of this invention can detect the color change on the surface of the dual-color part 2 of the fiber optic plug through visual observation. When the color of the internal color-changing plate 31 is fully displayed, it means that the fiber optic plug and the fiber optic adapter to be inserted are in complete contact. At this time, the fiber optic plug is fully installed, and the operator can visually see whether the fiber optic plug is installed correctly and the connection positioning is accurate.

[0021] refer to Figure 1-6 As shown, specifically, the fiber optic plug includes a connecting part 1 for inserting a fiber optic adapter. The fiber optic plug also includes: a two-color part 2, located at the end of the connecting part 1, comprising an observation end 21 and a blocking end 22; the observation end 21 is transparent, and the blocking end 22 is opaque; the observation end 21 has an observation port; a color-changing structure 3, located within the observation end 21, comprising a slidingly connected color-changing plate 31 and an abutment pin 32 linked to the color-changing plate 31; and a color-changing baffle 33, located within... Inside the observation port, the color-changing baffle 33 includes a shielding part 331 located on one side of the shielding end 22 and an observation part located on one side of the observation end 21. In the initial state, the color-changing baffle 31 and the shielding part 331 overlap. When the fiber optic adapter is not inserted into the connection part 1, the color-changing baffle 31 and the shielding part 331 of the color-changing baffle 33 overlap, and the color-changing baffle 31 is shielded. When the fiber optic adapter is inserted into the connection part 1, the fiber optic adapter pushes the color-changing baffle 31 to slide into the field of view of the observation part, and the color-changing baffle 31 is observed in the observation part.

[0022] refer to Figure 1-6 As shown, the connecting part 1 is the front end of the fiber optic plug, which can contact the fiber optic adapter. The fiber optic adapter is a component on the fiber optic box that connects the fiber optic cable. When the fiber optic adapter inside the fiber optic plug contacts and connects, the fiber optic network is established. A two-color part 2 is provided, which supports the connecting part 1 of the fiber optic plug and is located at the end of the connecting part 1. The two-color part 2 is composed of both transparent and black colors. The black part is the shielding end 22 of the two-color part 2, and the transparent part is the observation end 21 of the two-color part 2. Through the transparency of the observation end 21... The outer casing is visible, allowing a view of the internal structure of the fiber optic connector. An observation port is provided on one side of the observation end 21, through which the internal structure of the observation end 21 can be observed. A color-changing structure 3 is installed inside the observation end 21. The color-changing structure 3 includes a color-changing plate 31 and an abutment pin 32 that is linked to the color-changing plate 31. The color-changing plate 31 is green, and the abutment pin 32 is linked to the color-changing plate 31. When the abutment pin 32 moves in the direction of the color-changing plate D2, it drives the color-changing plate 31 to move along the length direction D1 of the observation port.

[0023] refer to Figure 1-6As shown, a color-changing baffle 33 is provided to create a shielding effect. The color-changing baffle 33 is also composed of two colors. One side is the shielding part 331, which is black and has the same color as the shielding end 22 of the two-color part 2. The other side is the observation part, which is transparent and has the same color as the observation end 21 of the two-color part 2. The color-changing baffle 33 is fixed at the observation port. At this time, when observing through the external observation port, the observable area of ​​the observation port is shielded by the shielding part 331 of the color-changing baffle 33. The shielded area coincides with the area of ​​the color-changing baffle 31. At this time, the color of the color-changing baffle 31 cannot be observed from the outside. When the fiber optic plug and the fiber optic adapter come into contact, the fiber optic adapter presses against the contact pin 32 under the action of the contact force. The abutment pin 32 causes the color-changing plate 31 to move. The color-changing plate 31 moves from behind the shielding part 331 of the color-changing baffle 33 to behind the observation part of the color-changing baffle 33. At this time, since the observation part is transparent, the green color of the color-changing plate 31 can be observed. This forms the phenomenon that the fiber optic adapter pushes the color-changing plate 31 to slide into the field of view of the observation part and can be observed by the observation part. At this time, the staff can judge whether the fiber optic plug is inserted in place by observing whether the color-changing plate 31 has completely moved out from behind the shielding part 331 of the color-changing baffle 33 until its shape is fully displayed. When the shape and color of the color-changing plate 31 are completely within the field of view of the observation part of the color-changing baffle 33, the fiber optic plug is successfully installed.

[0024] refer to Figure 1-6 As shown, the surface areas of both the shielding portion 331 and the observation portion of the color-changing baffle 33 are larger than the surface area of ​​the color-changing baffle 31. When the abutment pin 32 extends or retracts, the observation portion of the color-changing baffle 33 moves from being shielded by the shielding portion 331 to being observed. refer to Figure 1-6 As shown, in order to ensure that the color of the color-changing plate 31 is not observed before the fiber optic plug is inserted, the surface areas of the shielding part 331 and the observation part of the color-changing baffle 33 are both larger than the surface area of ​​the color-changing plate 31. At this time, when the color-changing plate 31 is behind the shielding part 331 of the color-changing baffle 33, it will be completely blocked. When the color-changing plate 31 moves to the rear of the observation part of the color-changing baffle 33, it can also be completely observed. Increasing the surface area of ​​the shielding part 331 and the observation part of the color-changing baffle 33 helps the staff to clearly confirm the changes and position of the color-changing plate 31. When the abutment pin 32 extends and retracts, the observation part of the color-changing baffle 33 moves from being blocked by the shielding part 331 to being observed, which allows the staff to observe clearly.

[0025] refer to Figure 1-6 As shown, the observation section of the color-changing baffle 33 is embedded with a prism with an observation angle of 150°. During observation, the color-changing baffle 31 can be observed from any angle within the fan-shaped observation area formed by the 150° angle of the prism.

[0026] refer to Figure 1-6As shown, in order to increase the observation range of the observation section of the color-changing baffle 33, a prism is embedded in the inner side of the color-changing baffle 33. The prism can reflect the state of the observation end 21 to a larger field of view through mirror reflection. Under normal conditions, the observation end 21 without the prism can only be observed from the front. When observed at an angle, the observation angle will be offset, and the specific position of the color-changing baffle 31 cannot be accurately located, resulting in positional error. Adding a prism with an observation angle of 150° can expand the observation angle to a 150° fan-shaped range. At this time, based on the fiber optic plug installation and the staff's standing position, the staff can accurately judge the movement position of the color-changing baffle 31 from any direction, improving the accuracy of observation.

[0027] refer to Figure 1-6 As shown, the dual-color part 2 is provided with a limiting groove 23 that matches the shape of the fiber optic adapter. The color-changing structure 3 is provided at the bottom of the limiting groove 23. A guide surface 24 is provided at the opening of the limiting groove 23. A magnetic guide piece is provided on the surface of the guide surface 24. There is an adsorption force between the magnetic guide piece and the end metal of the fiber optic adapter. A sliding groove 25 is provided in the limiting groove 23. The abutment pin 32 slides in the sliding groove 25. A return spring is provided at the bottom of the sliding groove 25. The elastic force of the return spring is less than or equal to the friction force between the fiber optic adapter and the inner wall of the limiting groove 23.

[0028] refer to Figure 1-6 As shown, a limiting groove 23 matching the fiber optic adapter is formed on the dual-color part 2 for insertion of the fiber optic adapter. The color-changing structure 3 is located at the bottom of the limiting groove 23. When the fiber optic adapter is inserted, it can abut against the color-changing structure 3. A guide surface 24 is provided at the opening of the limiting groove 23. A magnetic guide plate is provided on the surface of the guide surface 24. There is an adsorption force between the guide plate and the metal at the end of the fiber optic adapter, which can guide the fiber optic adapter to the position directly opposite the center of the color-changing structure 3 when it is inserted, preventing positional deviation when the fiber optic adapter is inserted. A sliding groove 25 is provided in the limiting groove 23. The abutment pin 32 is provided in the sliding groove 25 and slides. A return spring is provided at the bottom of the sliding groove 25. The return spring can drive the color-changing structure 3 to return when the fiber optic plug is pulled out. By polishing the inner wall of the limiting groove 23, the surface smoothness of the inner wall of the limiting groove 23 is improved so that the elastic force of the return spring is less than or equal to the friction between the fiber optic adapter and the inner wall of the limiting groove 23, thus ensuring the stability of its return.

[0029] refer to Figure 7 As shown, in order to ensure the manufacturing of the dual-color plug, a mixed state of black and transparent colors may occur. Therefore, a manufacturing process for the fiber optic plug is established, including: S1: Inject the first-color engineering plastic into the first mold cavity, wherein the first-color engineering plastic is black; S2: Open the mold, rotate the male mold core with the black base by 180 degrees, and position it in the second mold cavity. At this time, the black base is the blocking end 22. S3: The first mold cavity is purged with an ionized gas torch; S4: After purging, inject the second color engineering plastic into the second mold cavity. The second color engineering plastic is transparent and drives the first mold cavity and the second mold cavity to close, so that it fuses with the bonding surface of the black substrate under high temperature and high pressure to form a transparent observation end 21, thereby forming an integrated two-color part 2. S5: Anneal the integrated two-color part 2 body obtained in S4; S6: Connector 1 and threaded fixing part for splicing and installing fiber optic plugs; S7: Repeat S1 to S5, change the mold cavity to a plate material, and injection mold black and transparent color-changing baffle 33; S8: An observation port is formed by cutting at the observation end 21. The observation port is connected to the connecting part 1. The color-changing baffle 33 is fixed inside the observation port. The shielding part 331 of the color-changing baffle 33 is close to and abuts against the shielding end 22 for fixation. The observation part of the color-changing baffle 33 is close to and abuts against the observation part for fixation.

[0030] The first engineering plastic is set to black and injected into the first mold cavity. The black part of the two-color part 2 is formed in the first mold cavity. The mold is opened and the formed black base male mold core is rotated 180° and positioned in the second mold cavity. This helps to integrally form another part of the base onto the black shielding end 22. After injection molding, the first mold cavity is purged with an ionized gas torch to blow away the injection molding residue on the surface of the shielding end 22, preventing black residue from being mixed in during the forming of the observation end 21 and affecting the observation effect. After purging, there is no injection molding residue on the surface of the shielding end 22, so it can be integrated with the transparent observation end 21. After S4, the integrated two-color part 2 can be formed. Then, the integrated two-color part 2 is annealed to fill the gap between the shielding end 22 and the observation end 21 in the two-color part 2, and strengthen the integration of its structure.

[0031] When the black-based mold core rotates, its rotational positioning accuracy is ±0.02nm.

[0032] When the male mold core on the black base rotates, in order to ensure the positioning accuracy of the shielding end 22 and the observation end 21, the rotation accuracy is within the range of ±0.02nm after the positioning test, and the shapes of the composite shielding end 22 and the observation end 21 are adapted.

[0033] The second color engineering plastic is filled using multi-end injection speed, with the filling rate changing from low speed to medium speed to low speed. The maximum value of the pressure and filling rate during the holding pressure is matched and kept constant, and the holding pressure time is 8-15 seconds.

[0034] To ensure the integrity of the injection molding of the second-color engineering plastic and the mixing of the first-color engineering plastic, the filling rate is changed to a low-medium-low speed variation, which can improve the rigidity of the molding. During the holding pressure process, the holding pressure time and the maximum value of the filling rate are matched and constant, forming a multi-stage injection molding effect. Multi-end injection molding can make the material strength of the middle part of the color-changing part less than that of the front and rear ends, which can regionally enhance the structural strength of the transparent observation end 21 and make it easy to groove on the side to form an observation port, providing an excellent grooving environment for the subsequent installation of the color-changing baffle 33.

[0035] After the dual-color part 2 of the fiber optic plug is injection molded, the connecting part 1 and the threaded fixing part of the fiber optic plug are installed. The color-changing structure 3 is installed inside the dual-color part 2. An observation port is opened on one side of the observation end 21 of the dual-color part 2 and the color-changing baffle 33 is fixed by hot melt adhesive. At this time, the color-changing baffle 33 blocks the color-changing plate 31 of the dual-color part 2. When the fiber optic plug is in use, it abuts against the fiber optic adapter. At this time, the fiber optic adapter is inserted into the limiting groove 23 of the dual-color part 2 and abuts against the abutting pin 32. The abutting pin 32 drives the color-changing plate 31 to move. When the staff sees that the outline and color of the color-changing plate 31 are completely in the observable field of view, the threaded fixing part is tightened. At this time, the fiber optic plug and the fiber optic adapter are completely in contact and installed. If the outline and shape of the color-changing plate 31 are not completely in the observable field of view, that is, the connecting part 1 between the fiber optic plug and the fiber optic adapter is deformed or damaged, the fiber optic plug can be replaced. This forms the effect of visually observing whether the fiber optic plug is installed accurately.

[0036] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An optical fiber plug comprising a connection portion into which an optical fiber adapter is inserted, characterized by: The optical fiber plug further comprises: a bicolored part provided at the end of the connecting part, the bicolored part comprising an observation end and a shielding end, the observation end being transparent, and the shielding end being opaque; the observation end being provided with an observation opening; a color-changing structure provided in the observation end, the color-changing structure comprising a color-changing plate and a contact pin connected with the color-changing plate; a color-changing baffle provided in the observation opening, the color-changing baffle comprising a shielding part on one side of the shielding end and an observation part on one side of the observation end, the color-changing plate and the shielding part being coincident in the initial state; wherein, when the optical fiber adapter is not inserted into the connecting part, the color-changing plate and the shielding part of the color-changing baffle are coincident, and the color-changing plate is shielded; when the optical fiber adapter is inserted into the connecting part, the optical fiber adapter pushes the color-changing plate to slide to the field of view of the observation part, and the color-changing plate is observed in the observation part.

2. An optical fiber plug according to claim 1, characterized in that: The surface area of the shielding part and the observation part of the color-changing baffle is greater than the surface area of the color-changing plate, and when the contact pin is extended and retracted, the observation part of the color-changing baffle is moved from being shielded by the shielding part to being observed.

3. A fiber optic plug according to claim 1, wherein: The observation part of the color-changing baffle is embedded with a triangular prism, and the observation angle of the triangular prism is 150°; wherein, when observed, the color-changing plate can be observed at any angle in the 150° sector observation area formed by the triangular prism.

4. The fiber optic plug of claim 1, wherein: The bicolored part is provided with a limiting groove matched with the shape of the optical fiber adapter, the color-changing structure is provided at the groove bottom of the limiting groove, and a guide surface is provided at the opening of the limiting groove.

5. An optical fiber plug according to claim 4, characterized in that: A magnetic guide piece is provided on the surface of the guide surface, and an adsorption force exists between the magnetic guide piece and the metal end of the optical fiber adapter.

6. An optical fiber plug according to claim 5, characterized in that: A sliding groove is provided in the limiting groove, the contact pin slides in the sliding groove, a reset spring is provided at the bottom of the sliding groove, and the elastic force of the reset spring is less than or equal to the friction force between the optical fiber adapter and the inner wall of the limiting groove.

7. A manufacturing process for manufacturing an optical fiber plug according to any one of claims 1 to 6, characterized in that: The manufacturing process comprises: S1: injecting a first color engineering plastic into a first mold cavity, the first color engineering plastic being black; S2: opening the mold, rotating the male mold core formed with a black base by 180 degrees, and positioning it to a second mold cavity, at this time the black base is the shielding end; S3: blowing towards the first mold cavity with an ionized gas torch; S4: after blowing, injecting a second color engineering plastic towards the second mold cavity, the second color engineering plastic being transparent, and driving the first mold cavity and the second mold cavity to close, so that they are fused with the bonding surface of the black base under high temperature and high pressure, forming a transparent observation end, thereby forming an integrated bicolored part; S5: annealing the integrated bicolored part body obtained in S4; S6: splicing and installing the connecting part and the threaded fixing part of the optical fiber plug; S7: repeating S1 to S5, changing the mold cavity of the mold to plate-shaped material, and injection molding the black and transparent color-changing baffle; S8: cutting to form an observation opening in the observation end, the observation opening being communicated with the connecting part, fixing the color-changing baffle in the observation opening, fixing the shielding part of the color-changing baffle close to and abutting against the shielding end, and fixing the observation part of the color-changing baffle close to and abutting against the observation end.

8. A process for manufacturing an optical fiber plug according to claim 7, characterized in that: The rotation positioning accuracy of the male core of the black base is ±0.02nm.

9. The process of claim 7 wherein: The second color engineering plastic is filled by using a multi-end injection speed, the filling speed of the multi-end injection speed changes at low speed-middle speed-low speed, the pressure during pressure maintaining matches and is constant with the maximum value of the filling speed.

10. A process for manufacturing an optical fiber plug according to claim 9, characterized in that: The pressure maintaining time is 8-15s.

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