Continuous injection molding MT insertion core mold

Abstract

The invention relates to the technical field of optical fiber connectors, in particular to a continuous injection molding MT insertion core mold which comprises a lower mold, a first upper mold and a second upper mold. The lower die is provided with a male die; the first upper die and the second upper die are both concave dies; the lower die is provided with a positioning column; the middle of the connecting rod is hinged with the positioning column; one end of the positioning column is hinged to the first upper die in a sliding mode. The other end of the positioning column is hinged to the second upper die in a sliding mode. Alternate injection molding and heat dissipation are carried out between the first upper mold and the second upper mold, the single-time production period is remarkably shortened, and the batch production efficiency of the MT insertion cores is improved; in addition, the first upper mold and the second upper mold are integrated in the same mold system, two sets of independent molds or switching equipment do not need to be additionally configured, and the occupied space of the equipment is reduced; and meanwhile, the alternate injection molding process does not need to be switched through manual intervention, production operation is simplified, and the labor cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of fiber optic connector technology, and more specifically to a continuously injection molded MT ferrule mold. Background Technology

[0002] The MT ferrule is a core component of a fiber optic connector, primarily used for the precise positioning and splicing of multiple optical fibers. Its structural performance directly affects the signal transmission quality during fiber splicing. The surface of the MT ferrule typically has multiple fiber holes evenly distributed. These fiber holes are a critical structure for fiber installation, requiring extremely high straightness and dimensional accuracy to ensure that the fiber maintains its preset position and orientation after insertion, avoiding signal attenuation or interruption due to fiber misalignment.

[0003] In the injection molding process of MT ferrules, the fiber optic hole is formed by a forming pin embedded in the injection mold. That is, after molten plastic is injected into the mold, it cools and solidifies around the forming pin. After the mold is opened, the forming pin is removed, forming the required fiber optic hole. Due to the high precision requirements of fiber optic splicing, the aspect ratio of the fiber optic hole is usually large. If a highly elastic metal material is used to make the forming pin, it will be subjected to the impact pressure and extrusion of the plastic during the flow of molten plastic into the mold, easily causing bending deformation. This results in the straightness of the formed fiber optic hole exceeding the tolerance, failing to meet the precision requirements of fiber optic installation. Therefore, existing technologies generally use ceramic materials with lower elasticity and higher rigidity to make the fiber optic hole forming pin, ensuring the straightness accuracy of the fiber optic hole through the high rigidity of the ceramic material.

[0004] However, the thermal conductivity of ceramic materials is much lower than that of metal materials. Therefore, in the existing process, a certain period of time must be maintained after mold opening to allow the ceramic material molding pin to dissipate heat fully. This heat dissipation process significantly prolongs the production cycle of a single injection molding, resulting in a significant reduction in the production efficiency of MT cores. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a continuous injection molding MT core mold.

[0006] To achieve the above objectives, the specific solution of the present invention is as follows: a continuous injection molding MT ferrule mold, comprising a lower mold, a first upper mold, and a second upper mold; the lower mold is provided with punches at both ends along its length.

[0007] The first upper mold and the second upper mold are respectively movably mounted on the top of the punches at both ends of the lower mold along the length direction; both the first upper mold and the second upper mold are provided with concave molds that cooperate with the punches;

[0008] The lower mold has a positioning post at the middle of its length direction; the continuously injection molded MT core mold also includes a connecting rod; the middle of the connecting rod is hinged to the positioning post; the first upper mold has a first strip groove extending along its length direction; the second upper mold has a second strip groove extending along its length direction; one end of the connecting rod is slidably hinged to the first strip groove; the other end of the connecting rod is slidably hinged to the second strip groove.

[0009] Preferably, the continuously injection molded MT core mold further includes a top plate; the top plate is disposed on the top of the lower mold; a guide post extending along the height direction is provided between the top plate and the lower mold; the first upper mold and the second upper mold are slidably and vertically disposed on the guide post.

[0010] Preferably, the top plate is provided with an electric push rod; the output end of the electric push rod is connected to the first upper mold; the lower mold is provided with an injection port.

[0011] Preferably, the punch includes a main body punch disposed on the lower die, guide punches disposed on both sides of the main body punch, and a ceramic forming pin disposed on the top of the main body punch.

[0012] Preferably, both the first upper mold and the second upper mold are provided with a fixing groove communicating with the cavity mold; a fixing block is slidably provided in the fixing groove along the width direction; a fixing spring is provided between one end of the fixing block and the fixing groove; and the other end of the fixing block protrudes into the cavity mold and abuts against the body protrusion.

[0013] Preferably, both the first upper mold and the second upper mold are provided with a stripping groove communicating with the fixed groove; the stripping groove is provided with a stripping block along the height direction; the top of the stripping block protrudes out of the top of the stripping groove; the bottom of the stripping block protrudes into the fixed groove.

[0014] The bottom of the stripping block is provided with a stripping chute; one end of the fixing block is provided with a fixing pin; the fixing pin is movably disposed in the stripping chute; the bottom surface of the top plate is provided with a stripping surface for abutting against the top of the stripping block.

[0015] Preferably, a side plate is provided between the top plate and the lower mold; and a feeding plate is movably provided at both ends of the side plate along the length direction.

[0016] Preferably, the side plate has a tilting groove extending along its length; the side plate has an abutment surface at the bottom of the tilting groove; one end of the feed plate has a swing arm; the swing arm has a tilting pin; the tilting pin is movably disposed between the abutment surface and the tilting groove; and the other end of the feed plate has a counterweight.

[0017] Preferably, the feeding plate and the swing arm are arranged at an angle.

[0018] Preferably, one end of the swing arm is connected to one end of the unloading plate; the swing arm is provided with a hinge groove and a limiting pin; from one end of the swing arm to the other end, the flip pin, the hinge groove and the limiting pin are arranged in sequence; the first upper mold and the second upper mold are respectively hinged to the hinge groove; both the first upper mold and the second upper mold are provided with an arc-shaped limiting groove; the limiting pin is movably disposed in the arc-shaped limiting groove.

[0019] The beneficial effects of this invention are as follows: This invention performs alternating injection and heat dissipation between the first upper mold and the second upper mold, integrating the heat dissipation process into the injection process of the other mold cavity, which significantly shortens the single production cycle and improves the mass production efficiency of MT cores; in addition, by integrating the first upper mold and the second upper mold into the same mold system, there is no need to configure two separate molds or switching equipment, reducing the space occupied by the equipment; at the same time, the alternating injection process does not require manual intervention for switching, simplifying production operations and reducing labor costs. Attached Figure Description

[0020] The invention will be further illustrated with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the invention. For those skilled in the art, other drawings can be obtained based on the following drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the present invention after the side plates are hidden;

[0024] Figure 4 This is a cross-sectional view of the present invention;

[0025] Figure 5 for Figure 4 A magnified view of part A in the middle;

[0026] Figure 6 This is a cross-sectional view of the present invention from another perspective;

[0027] Figure 7 for Figure 6 A magnified view of part B in the middle;

[0028] Figure 8 for Figure 6 A magnified view of part C in the middle;

[0029] Figure 9 This is a schematic diagram of the structure of the first upper mold of the present invention;

[0030] Figure 10This is a schematic diagram of the material feeding plate of the present invention;

[0031] Figure 11 This is a schematic diagram of the MT ferrule mold of the present invention;

[0032] The components are as follows: 1. Lower mold; 11. Injection port; 12. Punch; 13. Body punch; 14. Guide punch; 15. Ceramic forming pin; 21. First upper mold; 22. Second upper mold; 23. Die; 24. First slot; 25. Second slot; 26. Arc-shaped limiting slot; 31. Positioning pin; 32. Connecting rod; 4. Top plate; 41. Guide pin; 42. Electric ejector rod; 43. Stripping surface; 5. Fixing groove; 51. Fixing spring; 52. Fixing block; 53. Fixing pin; 6. Unloading groove; 61. Unloading block; 62. Unloading inclined groove; 7. Side plate; 71. Tilting groove; 72. Abutting surface; 8. Unloading plate; 81. Counterweight block; 82. Swing arm; 83. Tilting pin; 84. Hinge groove; 85. Limiting pin; 91. Central cavity; 92. Guide groove; 93. Fiber optic hole; 94. Glue injection groove. Detailed Implementation

[0033] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention. It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0034] like Figures 1-11 As shown, a continuous injection molding MT core mold of this embodiment includes a lower mold 1, a first upper mold 21 and a second upper mold 22; the lower mold 1 is provided with punches 12 at both ends along the length direction;

[0035] The first upper mold 21 and the second upper mold 22 are respectively movably mounted on the top of the punches 12 at both ends of the lower mold 1 along the length direction; both the first upper mold 21 and the second upper mold 22 are provided with concave molds 23 that cooperate with the punches 12.

[0036] The lower mold 1 has a positioning post 31 at the middle of its length direction; the continuously injection molded MT core mold also includes a connecting rod 32; the middle of the connecting rod 32 is hinged to the positioning post 31; the first upper mold 21 has a first strip groove 24 extending along its length direction; the second upper mold 22 has a second strip groove 25 extending along its length direction; one end of the connecting rod 32 is slidably hinged to the first strip groove 24; the other end of the connecting rod 32 is slidably hinged to the second strip groove 25.

[0037] Specifically, in the continuous injection molding MT core mold described in this embodiment, when the first upper mold 21 descends and closes with the lower mold 1, a mold cavity is formed between the concave mold 23 of the first upper mold 21 and the punch 12 at one end of the lower mold 1 along the length direction, and then the mold cavity is injection molded; during this process, while the first upper mold 21 descends, the second upper mold 22 moves upward under the drive of the connecting rod 32, so that the second upper mold 22 opens with the lower mold 1, thereby allowing the punch 12 at the other end of the lower mold 1 along the length direction to be cooled;

[0038] Similarly, when the first upper mold 21 rises to open with the lower mold 1, the second upper mold 22 descends to close with the lower mold 1.

[0039] In this embodiment, the first upper mold 21 and the second upper mold 22 are alternately injected and cooled, and the cooling process is integrated into the injection process of the other mold cavity, which significantly shortens the single production cycle and improves the mass production efficiency of MT cores.

[0040] In addition, by integrating the first upper mold 21 and the second upper mold 22 into the same mold system, there is no need to configure two separate molds or switch equipment, which reduces the space occupied by the equipment; at the same time, the alternating injection process does not require manual intervention to switch, which simplifies the production operation and reduces labor costs.

[0041] This embodiment provides a continuous injection molding MT ferrule mold, which further includes a top plate 4. The top plate 4 is disposed on the top of the lower mold 1. A guide post 41 extending along the height direction is provided between the top plate 4 and the lower mold 1. The first upper mold 21 and the second upper mold 22 are slidably and vertically mounted on the guide post 41. The above arrangement enables the first upper mold 21 and the second upper mold 22 to perform stable lifting and lowering movements.

[0042] This embodiment provides a continuous injection molding MT core mold, wherein the top plate 4 is provided with an electric push rod 42; the output end of the electric push rod 42 is connected to a first upper mold 21; and the lower mold 1 is provided with an injection port 11. Specifically, this embodiment integrates the first upper mold 21 and the second upper mold 22 into the same mold system. When the electric push rod 42 pushes the first upper mold 21 to rise, the second upper mold 22 descends synchronously, and when the electric push rod 42 pushes the first upper mold 21 to descend, the second upper mold 22 rises synchronously. In addition, by providing the injection port 11, the injection port 11 can form a mold cavity communication with the cavity mold 23 and the punch mold 12, thereby enabling injection molding of the mold cavity.

[0043] This embodiment provides a continuous injection molding MT ferrule mold. The punch 12 includes a body punch 13 disposed on the lower mold 1, guide punches 14 disposed on both sides of the body punch 13, and a ceramic forming pin 15 disposed on the top of the body punch 13. The body punch 13 is used to form the central cavity 91 of the MT ferrule, the guide punches 14 are used to form the guide groove 92 of the MT ferrule, and the ceramic forming pin 15 is used to form the fiber optic hole 93 of the MT ferrule.

[0044] This embodiment provides a continuous injection molding MT ferrule mold. Both the first upper mold 21 and the second upper mold 22 are provided with fixing grooves 5 communicating with the cavity mold 23. Fixing blocks 52 are slidably provided in the fixing grooves 5 along their width. A fixing spring 51 is provided between one end of the fixing block 52 and the fixing groove 5. The other end of the fixing block 52 protrudes into the cavity mold 23 and abuts against the body protrusion 13. Specifically, when the first upper mold 21 and the lower mold 1 are closed, or when the second upper mold 22 and the lower mold 1 are closed, under the action of the fixing spring 51, the other end of the fixing block 52 protrudes into the cavity mold 23 and abuts against the body protrusion 13. This allows a glue injection groove 94 communicating with the central cavity 91 of the MT ferrule to be formed on the surface of the MT ferrule after injection molding.

[0045] In this embodiment, a continuous injection molding MT core mold is provided. Both the first upper mold 21 and the second upper mold 22 are provided with stripping grooves 6 that communicate with the fixing groove 5. Stripping blocks 61 are slidably provided in the stripping groove 6 along the height direction. The top of the stripping block 61 protrudes out of the top of the stripping groove 6. The bottom of the stripping block 61 protrudes into the fixing groove 5. The bottom of the stripping block 61 is provided with a stripping inclined groove 62. One end of the fixing block 52 is provided with a fixing pin 53. The fixing pin 53 is movably provided in the stripping inclined groove 62. The bottom surface of the top plate 4 is provided with a stripping surface 43 for abutting against the top of the stripping block 61.

[0046] Specifically, in the continuous injection molding MT core mold described in this embodiment, when the first upper mold 21 and the lower mold 1 are closed or the second upper mold 22 and the lower mold 1 are closed, under the action of the fixing spring 51, the other end of the fixing block 52 protrudes into the cavity mold 23 and abuts against the body protrusion 13. At this time, the fixing pin 53 is located at the bottom of the stripping groove 62, and the top of the stripping block 61 protrudes out of the stripping groove 6 for a relatively long length. Then, the MT core is injection molded through the injection port 11. With the cooperation of the fixing block 52 and the body protrusion 13, a glue injection groove 94 can be formed on the surface of the MT core, and the fixing block 52 is kept in the glue injection groove 94 of the MT core.

[0047] Next, the first upper mold 21 and the lower mold 1 are opened, or the second upper mold 22 and the lower mold 1 are opened. At this time, the first upper mold 21 or the second upper mold 22 moves upward until the top of the stripper block 61 abuts against the stripper surface 43. The stripper surface 43 pushes the stripper block 61 downward. Through the cooperation of the stripper sloping groove 62 and the fixing pin 53, the other end of the fixing block 52 is driven to retract into the fixing groove 5, thereby separating the fixing block 52 from the glue injection groove 94 of the MT core, so that the MT core falls out of the cavity mold 23.

[0048] In this embodiment of a continuous injection molding MT ferrule mold, a side plate 7 is provided between the top plate 4 and the lower mold 1; both ends of the side plate 7 are movably provided with a feed plate 8. In this embodiment of a continuous injection molding MT ferrule mold, the side plate 7 has a tilting groove 71 extending along its length; the side plate 7 has an abutment surface 72 at the bottom of the tilting groove 71; one end of the feed plate 8 has a swing arm 82; the swing arm 82 has a tilting pin 83; the tilting pin 83 is movably disposed between the abutment surface 72 and the tilting groove 71; the other end of the feed plate 8 has a counterweight 81. In this embodiment of a continuous injection molding MT ferrule mold, the feed plate 8 and the swing arm 82 are inclined. In this embodiment, a continuous injection molding MT core mold is provided. One end of the swing arm 82 is connected to one end of the blanking plate 8. The swing arm 82 is provided with a hinge groove 84 and a limiting pin 85. From one end of the swing arm 82 to the other end, the flip pin 83, the hinge groove 84 and the limiting pin 85 are arranged in sequence. The first upper mold 21 and the second upper mold 22 are respectively hinged to the hinge groove 84. Both the first upper mold 21 and the second upper mold 22 are provided with an arc-shaped limiting groove 26. The limiting pin 85 is movably disposed in the arc-shaped limiting groove 26.

[0049] Specifically, in the continuous injection molding MT core mold described in this embodiment, when the first upper mold 21 and the lower mold 1 are closed or the second upper mold 22 and the lower mold 1 are closed, the material feed plate 8 and the swing arm 82 are inclined, and the counterweight 81 is located at the other end of the material feed plate 8, so that the flip pin 83 abuts against the abutting surface 72 of the side plate 7. The material feed plate 8 is located at the end of the first upper mold 21 or the second upper mold 22, so that the material feed plate 8 will not hinder the first upper mold 21 and the lower mold 1 from closing or the second upper mold 22 and the lower mold 1 from closing.

[0050] When the first upper mold 21 needs to be opened, it moves upward, and the flipping pin 83 moves upward along the abutment surface 72. When the flipping pin 83 reaches the flipping groove 71, the counterweight 81 continuously applies a downward force to the swing arm 82, causing the flipping pin 83 to enter the flipping groove 71. As the first upper mold 21 continues to move upward, the flipping pin 83 gradually moves into the flipping groove 71. With the cooperation of the arc-shaped limiting groove 26 and the limiting pin 85, the swing arm 82 drives the material plate 8 along the abutment surface 72. The hinge of the upper mold 21 is flipped, so that the blanking plate 8 is flipped to the underside of the first upper mold 21. At this time, the top of the stripper block 61 abuts against the stripper surface 43, and the stripper surface 43 pushes the stripper block 61 to move downward. Through the cooperation of the stripper sloping groove 62 and the fixing pin 53, the other end of the fixing block 52 is driven to retract into the fixing groove 5, so that the fixing block 52 is separated from the glue injection groove 94 of the MT core, so that the MT core falls from the die 23 to the blanking plate 8 for blanking, preventing the MT core from falling to the punch 12 and damaging the punch 12.

[0051] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included within the protection scope of this patent application.

Claims

1. A continuous injection molding MT core mold, characterized in that: It includes a lower mold (1), a first upper mold (21) and a second upper mold (22); the lower mold (1) is provided with punches (12) at both ends along the length direction; The first upper mold (21) and the second upper mold (22) are respectively raised and lowered and moved to the top of the punches (12) at both ends of the lower mold (1) along the length direction; the first upper mold (21) and the second upper mold (22) are each provided with a concave mold (23) that cooperates with the punches (12); The lower mold (1) has a positioning post (31) at the middle of its length direction; the continuously injection molded MT core mold also includes a connecting rod (32); the middle of the connecting rod (32) is hinged to the positioning post (31); the first upper mold (21) has a first strip groove (24) extending along its length direction; the second upper mold (22) has a second strip groove (25) extending along its length direction; one end of the connecting rod (32) is slidably hinged to the first strip groove (24); the other end of the connecting rod (32) is slidably hinged to the second strip groove (25).

2. The MT ferrule mold for continuous injection molding according to claim 1, characterized in that: The continuous injection molding MT core mold also includes a top plate (4); the top plate (4) is located on the top of the lower mold (1); a guide post (41) extending along the height direction is provided between the top plate (4) and the lower mold (1); the first upper mold (21) and the second upper mold (22) are slidably mounted on the guide post (41).

3. The MT ferrule mold for continuous injection molding according to claim 2, characterized in that: The top plate (4) is provided with an electric push rod (42); the output end of the electric push rod (42) is connected to the first upper mold (21); the lower mold (1) is provided with an injection port (11).

4. The MT ferrule mold for continuous injection molding according to claim 2, characterized in that: The punch (12) includes a main body punch (13) disposed on the lower mold (1), guide punches (14) disposed on both sides of the main body punch (13), and a ceramic forming pin (15) disposed on the top of the main body punch (13).

5. The MT ferrule mold for continuous injection molding according to claim 4, characterized in that: Both the first upper mold (21) and the second upper mold (22) are provided with a fixing groove (5) that communicates with the cavity mold (23); the fixing groove (5) is provided with a fixing block (52) that slides along the width direction; a fixing spring (51) is provided between one end of the fixing block (52) and the fixing groove (5); the other end of the fixing block (52) protrudes into the cavity mold (23) and abuts against the body protrusion (13).

6. The MT ferrule mold for continuous injection molding according to claim 4, characterized in that: Both the first upper mold (21) and the second upper mold (22) are provided with a stripping groove (6) that communicates with the fixed groove (5); the stripping groove (6) is provided with a stripping block (61) along the height direction; the top of the stripping block (61) protrudes out of the top of the stripping groove (6); the bottom of the stripping block (61) protrudes into the fixed groove (5); The bottom of the stripping block (61) is provided with a stripping chute (62); one end of the fixing block (52) is provided with a fixing pin (53); the fixing pin (53) is movably disposed in the stripping chute (62); the bottom surface of the top plate (4) is provided with a stripping surface (43) for abutting against the top of the stripping block (61).

7. The MT ferrule mold for continuous injection molding according to claim 2, characterized in that: A side plate (7) is provided between the top plate (4) and the lower mold (1); a material feed plate (8) is movably provided at both ends of the side plate (7) along the length direction.

8. The MT ferrule mold for continuous injection molding according to claim 7, characterized in that: The side plate (7) has a tilting groove (71) extending along its length; the side plate (7) has an abutment surface (72) at the bottom of the tilting groove (71); one end of the feed plate (8) has a swing arm (82); the swing arm (82) has a tilting pin (83); the tilting pin (83) is movably disposed between the abutment surface (72) and the tilting groove (71); the other end of the feed plate (8) has a counterweight (81).

9. The MT ferrule mold for continuous injection molding according to claim 8, characterized in that: The feeding plate (8) and the swing arm (82) are inclined.

10. A continuously injection molded MT core mold according to claim 8, characterized in that: One end of the swing arm (82) is connected to one end of the unloading plate (8); the swing arm (82) is provided with a hinge groove (84) and a limiting pin (85); from one end of the swing arm (82) to the other end of the swing arm (82), the flip pin (83), the hinge groove (84) and the limiting pin (85) are arranged in sequence; the first upper mold (21) and the second upper mold (22) are respectively hinged to the hinge groove (84); the first upper mold (21) and the second upper mold (22) are both provided with an arc-shaped limiting groove (26); the limiting pin (85) is movably disposed in the arc-shaped limiting groove (26).

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