Precise plastic mold for optical fiber cable plastic box

Abstract

The utility model discloses a precise plastic mould for an optical fiber and cable plastic box, and relates to the technical field of moulds. The injection mold comprises an upper mold and a lower mold which are closed, an inner core block matched with a forming cavity in the lower end of the upper mold is arranged in the middle of the upper end of the lower mold, a groove allowing a sampling top plate to ascend and descend is formed in the middle of the inner core block, and an injection molding cavity channel communicated with a butt joint nozzle on the top of the upper mold is formed in the middle of the forming cavity. According to the utility model, the electric heating wire for heating the residual wall-mounted cooling injection molding liquid is designed outside the injection molding cavity channel, and after the cooled wall-mounted plastic cement is hot-melted, the wall-mounted plastic cement can be quickly cooled, so that the wall-mounted plastic cement can be quickly cooled, and the wall-mounted plastic cement can be quickly cooled. The wall-hanging injection liquid attached to the inner wall of the injection cavity channel can be cleaned in cooperation with the two semicircular scrapers, so that the liquidity of the injection cavity channel to the nozzle part is guaranteed, and the situation that wall-hanging residues affect injection molding of the injection liquid is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of mould, concretely relates to a precision plastic mould for optical fiber cable plastic box. BACKGROUND

[0002] The plastic mould is a kind of combined mould for compression molding, extrusion molding, injection molding, blow molding and low-foam forming, and the coordinated change of the male and female moulds and auxiliary molding system can process a series of plastic parts with different shapes and sizes, for example, the plastic box for protecting optical fiber cable is produced by using injection mould, and the injection mould is more precise than ordinary mould to ensure the injection effect.

[0003] At present, it is found that there is residual injection liquid between the injection nozzle and the upper mould during the use of the equipment, that is, the residual injection liquid from the injection nozzle enters the injection cavity of the upper mould, and then cools and adheres to the wall near the cavity entrance, which will cause the injection liquid injected by the injection nozzle to fail to reach the required injection amount within the same time, thereby causing too many defective products after the plastic box is formed, that is, the surface of the plastic shell appears to be defective and uneven, and therefore the utility model is proposed. CONTENT OF THE UTILITY MODEL

[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a precision plastic mould for optical fiber cable plastic box.

[0005] To solve the above technical problems, the basic concept of the technical scheme of the utility model is as follows:

[0006] A precision plastic mould for optical fiber cable plastic box, comprising a closed upper mould and a lower mould, the upper end of the lower mould is provided with an inner core block matched with the lower end of the upper mould, a recess for lifting a sampling top plate is formed in the middle of the inner core block, an injection cavity is formed in the middle of the forming cavity and is connected with a butt joint nozzle at the top of the upper mould, the inner part of the upper end of the butt joint nozzle is fixed with a mounting ring, a reserved hole for mounting an injection nozzle is formed in the middle of the mounting ring, and the outer part of the upper end of the injection nozzle is wrapped with a heat preservation assembly.

[0007] A spiral cavity for mounting an electric heating wire is formed in the outer part of the injection cavity, the spiral cavity is formed in the inner part of the wall of the upper mould, the outer part of the electric heating wire is wrapped with a heat-resistant sleeve, and the electric heating wire is connected with a first temperature controller at the top of the upper mould through a wire.

[0008] Two semicircular scrapers are further formed in the upper end of the forming cavity, and an exhaust cavity is further formed in the two sides of the upper end of the forming cavity.

[0009] Optionally, the middle part of the mounting ring is provided with two accommodation holes for the transmission rods to pass through, both transmission rods pass through the inside of the injection cavity and are fixed with the transmission ring, and both sides of the outside of the transmission ring are fixed with two semicircular scrapers through limiting pegs.

[0010] Optionally, the top parts of the two transmission rods are fixed with the same transmission plate, one side of the transmission plate is fixed with a guide plate, the middle part of the guide plate is provided with a guide hole for the guide rod to pass through, the upper end of the guide rod is fixed with the L-shaped seat, the lower end of the guide rod is fixed with the upper die, and both sides of the guide hole are installed with rolling balls, and the outer surfaces of the rolling balls are in contact with the guide rod.

[0011] Optionally, the top part of the L-shaped seat is fixed with an electric push rod, the telescopic end of the electric push rod passes through the horizontal end of the L-shaped seat and is fixed with the upper end of the guide plate, and the side end of the guide plate is fixed with a sliding block matched with the middle sliding rail of the L-shaped seat.

[0012] Optionally, the heat preservation assembly comprises a heat conduction sleeve, an electric heating film, a magic tape and a heat preservation sleeve, the inside of the heat conduction sleeve is provided with the electric heating film, the electric heating film is connected with the second temperature controller circuit on the side of the docking nozzle through wires, and the outside of the heat conduction sleeve is installed with the heat preservation sleeve through the magic tape.

[0013] Optionally, the inside of the inner core block is provided with cavities for the pen type electric telescopic rod and the positioning rod to pass through, the top part of the pen type electric telescopic rod passes through the cavity and is fixed with the bottom part of the sampling top plate, and the outside of the pen type electric telescopic rod and the positioning rod is sleeved with a telescopic protection sleeve, and the upper and lower ends of the telescopic protection sleeve are fixed with the opposite surfaces of the inner core block and the sampling top plate, and the side of the sampling top plate is fixed with a plurality of high-temperature-resistant sealing rings.

[0014] Optionally, the bottom part of the sampling top plate is installed with a polyurethane buffer ring, and the bottom part of the sampling top plate is also provided with a pressure sensor.

[0015] After the above technical scheme is adopted, the present application has the following advantages compared with the prior art, of course, any product implementing the present application does not necessarily need to achieve all the advantages described below:

[0016] The electric heating wire for heating the residual wall-hung cooling injection liquid is arranged outside the injection cavity, and after the wall-hung plastic hot melt after cooling, the two semicircular scrapers can clean the wall-hung injection liquid attached to the inner wall of the injection cavity, so as to ensure the flowability of the injection cavity and the docking nozzle part, and avoid the influence of wall-hung residual on the injection of the injection liquid.

[0017] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0019] Figure 1 This is a schematic diagram of the external structure of the transmission ring component in this utility model;

[0020] Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0021] Figure 3 for Figure 2 A schematic diagram of the structure of part A in the diagram;

[0022] Figure 4 for Figure 2 A schematic diagram of the structure of part B in the diagram;

[0023] Figure 5 for Figure 2 A schematic diagram of the structure of part C in the diagram;

[0024] Figure 6 for Figure 2 A schematic diagram of the structure of part D in the diagram;

[0025] Figure 7 for Figure 2 A schematic diagram of the structure of part E in the diagram;

[0026] Figure 8 for Figure 2 A schematic diagram of the structure of part F in the diagram.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Lower mold; 2. Upper mold; 3. Molding cavity; 4. Inner core block; 5. Sampling top plate; 6. Connecting nozzle; 7. Injection cavity; 8. Mounting ring; 9. Injection nozzle; 10. Electric heating wire; 11. Heat-resistant sleeve; 12. First temperature controller; 13. Semi-circular scraper; 14. Exhaust pipe; 15. One-way negative pressure nozzle; 16. Negative pressure pipe; 17. Transmission rod; 18. Transmission ring; 19. Limiting bolt; 20. Pressure sensor; 21. Transmission plate; 22. Guide plate; 23. Guide rod; 24. L-shaped seat; 25. Ball bearing; 26. Electric push rod; 27. Slide rail; 28. Slider; 29. ​​Heat-conducting sleeve; 30. Electric heating film; 31. Velcro; 32. Insulation sleeve; 33. Second temperature controller; 34. Telescopic protective sleeve; 35. Pen-type electric telescopic rod; 36. High-temperature resistant sealing ring; 37. Polyurethane buffer ring.

[0029] It should be noted that the drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0030] The utility model will be explained further in detail by combining with the drawings.

[0031] Please refer to Figures 1 to 8 The utility model provides a kind of technical scheme: a precision plastic mould for optical fiber cable plastic box, including closed upper mould 2 and lower mould 1, the upper end middle part of lower mould 1 is equipped with the inner core block 4 being adapted with the lower end forming cavity 3 of upper mould 2, recess is opened in the middle part of inner core block 4, for the lifting of sampling top plate 5, forming cavity 3 is equipped with the injection cavity 7 being communicated with the upper end inside fixed with installation ring 8 of butt joint nozzle 6 of upper mould 2 top, the middle part of installation ring 8 is equipped with the reserved hole for the installation of injection nozzle 9, the upper end outside of injection nozzle 9 is wrapped with heat preservation component;

[0032] Injection cavity 7 is equipped with the spiral cavity for the installation of electric heating wire 10 outside, spiral cavity is opened in the wall body inside of upper mould 2, the outside of electric heating wire 10 is wrapped with heat-resistant sleeve 11, electric heating wire 10 is connected with the first temperature controller 12 of upper mould 2 top by wire, the inside of injection cavity 7 is also equipped with two semicircular scrapers 13;

[0033] The upper end both sides of forming cavity 3 are also equipped with exhaust cavity, the inside of exhaust cavity is equipped with exhaust pipe 14, the bottom of exhaust pipe 14 is communicated with the one-way negative pressure nozzle 15 of exhaust cavity bottom, the upper end of exhaust pipe 14 is communicated with the negative pressure pipe 16 of upper mould 2 top, the utility model considers that the situation of residual injection liquid exists between injection nozzle 9 and injection upper mould 2 during the use of current equipment, i.e. the injection liquid that is not used up enters the injection cavity 7 of upper mould 2 from injection nozzle 9, and the wall-hanging cooling occurs near the cavity inlet, which will cause the injection liquid injected by injection nozzle 9 to be unable to reach the required injection amount within the same time, thereby causing too many defective products after the formation of plastic box, i.e. the situation of residual defects on the surface of plastic shell, electric heating wire 10 is designed outside injection cavity 7 to heat the residual wall-hanging cooling injection liquid, and the wall-hanging injection liquid attached to the inner wall of injection cavity 7 can be cleaned after the hot melting of the cooled wall-hanging plastic, so as to ensure the flowability of injection cavity 7 with butt joint nozzle 6 part, and avoid the influence of wall-hanging residual on injection liquid injection.

[0034] The middle part of the installation ring 8 is provided with two accommodation holes for the transmission rods 17, the two transmission rods 17 penetrate into the inside of the injection cavity 7 and are fixed with the transmission ring 18, and the two sides of the outside of the transmission ring 18 are fixed with two semicircular scrapers 13 through the limiting pins 19. The transmission rods 17 cooperate with the transmission ring 18 to drive the two semicircular scrapers 13, that is, when the electric push rod 26 drives the guide plate 22 to press down, the transmission plate 21 is pressed down, and the transmission rod 17 drives the transmission plate 21 to press down. In this process, the semicircular scraper 13 cleans the inner wall of the injection cavity 7.

[0035] The top of the two transmission rods 17 is fixed with the same transmission plate 21, one side of the transmission plate 21 is fixed with the guide plate 22, the middle part of the guide plate 22 is provided with a guide hole for the guide rod 23, the upper end of the guide rod 23 is fixed with the L-shaped seat 24, the lower end of the guide rod 23 is fixed with the upper mold 2, and the two sides of the guide hole are provided with the ball 25. The outer surface of the ball 25 is in contact with the guide rod 23. The guide rod 23 guides the moving guide plate 22, and the ball 25 reduces the friction force of the contact surface of the guide hole and the guide rod 23.

[0036] The top of the L-shaped seat 24 is fixed with the electric push rod 26, the telescopic end of the electric push rod 26 penetrates through the horizontal end of the L-shaped seat 24 and is fixed with the upper end of the guide plate 22, and the side end of the guide plate 22 is fixed with the sliding block 28 matched with the middle sliding rail 27 of the L-shaped seat 24. The electric push rod 26 drives the guide plate 22 to press down, and the sliding block 28 cooperates with the sliding rail 27 to guide the other end of the guide plate 22, thereby ensuring the stability of the guide plate 22 during movement.

[0037] The heat preservation assembly includes the heat conduction sleeve 29, the electric heating film 30, the magic tape 31 and the heat preservation sleeve 32. The inside of the heat conduction sleeve 29 is provided with the electric heating film 30, the electric heating film 30 is electrically connected with the second temperature controller 33 through wires, the outside of the heat conduction sleeve 29 is installed with the heat preservation sleeve 32 through the magic tape 31, and the heat preservation assembly reduces the temperature difference of the injection nozzle 9 and the pipeline connected with the injection nozzle 9, thereby preventing the injection nozzle 9 and the pipeline from being blocked due to rapid cooling caused by temperature difference.

[0038] The inner core block 4 is internally provided with cavities for the pen type electric telescopic rod 35 and the positioning rod to penetrate, the top of the pen type electric telescopic rod 35 penetrates the cavity and is fixed to the bottom of the sampling top plate 5, the pen type electric telescopic rod 35 and the positioning rod are externally sleeved with telescopic protective sleeves 34, the upper and lower ends of the telescopic protective sleeves 34 are fixed to the opposite surfaces of the inner core block 4 and the sampling top plate 5, a plurality of high-temperature-resistant sealing rings 36 are fixed to the side of the sampling top plate 5, the pen type electric telescopic rod 35 is arranged to drive the sampling top plate 5 to ascend and descend, when the sampling top plate 5 is lifted, the sampling top plate 5 is separated from the groove, and the cooled injection molding part is easily taken out.

[0039] The bottom of the sampling top plate 5 is provided with a polyurethane buffer ring 37, and the bottom of the sampling top plate 5 is further provided with a pressure sensor 20, the polyurethane buffer ring 37 is arranged to buffer the sampling top plate 5 and the groove, and the pressure sensor 20 is arranged to facilitate the user to know whether the sampling top plate 5 is in close contact with the groove.

[0040] The utility model is not limited to the above-mentioned embodiment, any person should know the structural change made under the inspiration of the utility model, any technical scheme with the same or similar utility model falls into the protection scope of the utility model. The utility model is not described in detail, and the technical, shape and structure parts are known technology.

Claims

1. A precision plastic mold for a plastic box of an optical fiber cable, comprising a closed upper mold (2) and a lower mold (1), characterized in that, The upper end middle part of the lower mold (1) is provided with an inner core block (4) matched with the lower end forming cavity (3) of the upper mold (2), a groove is formed in the middle part of the inner core block (4) for lifting the sampling top plate (5), the middle part of the forming cavity (3) is provided with an injection cavity (7) communicated with the upper end of the butt joint nozzle (6) of the upper mold (2), the inner part of the upper end of the butt joint nozzle (6) is fixedly provided with a mounting ring (8), the middle part of the mounting ring (8) is provided with a reserved hole for mounting the injection nozzle (9), and the outer part of the upper end of the injection nozzle (9) is wrapped with a heat preservation assembly. The outer part of the injection cavity (7) is provided with a spiral cavity for mounting the electric heating wire (10), the spiral cavity is formed in the wall body of the upper mold (2), the outer part of the electric heating wire (10) is wrapped with a heat-resistant sleeve (11), and the electric heating wire (10) is connected with the first temperature controller (12) at the top of the upper mold (2) through a wire, and the inner part of the injection cavity (7) is further provided with two semicircular scrapers (13). The upper end of the forming cavity (3) is further provided with an exhaust cavity on both sides, the inner part of the exhaust cavity is provided with an exhaust pipe (14), the bottom of the exhaust pipe (14) is communicated with the one-way negative pressure nozzle (15) at the bottom of the exhaust cavity, and the upper end of the exhaust pipe (14) is communicated with the negative pressure pipe (16) at the top of the upper mold (2).

2. The precision plastic mold for the plastic box of the optical fiber cable according to claim 1, wherein, The middle part of the mounting ring (8) is provided with two accommodation holes for the transmission rods (17) to penetrate, the two transmission rods (17) penetrate into the inner part of the injection cavity (7) and are fixed with the transmission ring (18), and the outer part of the transmission ring (18) is fixed with the two semicircular scrapers (13) on both sides through the limiting pins (19).

3. The precision plastic mold for the plastic box of the optical fiber cable according to claim 2, characterized in that, The top of the two transmission rods (17) is fixed with the same transmission plate (21), one side of the transmission plate (21) is fixed with the guide plate (22), the middle part of the guide plate (22) is provided with a guide hole for the guide rod (23) to penetrate, the upper end of the guide rod (23) is fixed with the L-shaped seat (24), the lower end of the guide rod (23) is fixed with the upper mold (2), and the two sides of the guide hole are provided with the rolling balls (25), and the outer surface of the rolling balls (25) is in contact with the guide rod (23).

4. The precision plastic mold for the plastic box of the optical fiber cable according to claim 3, characterized in that, The top of the L-shaped seat (24) is fixed with the electric push rod (26), the telescopic end of the electric push rod (26) penetrates through the horizontal end of the L-shaped seat (24) and is fixed with the upper end of the guide plate (22), and the side end of the guide plate (22) is fixed with the sliding block (28) matched with the middle sliding rail (27) of the L-shaped seat (24).

5. The precision plastic mold for plastic box of optical fiber cable according to claim 1, wherein, The heat preservation assembly comprises a heat conduction sleeve (29), an electric heating film (30), a magic tape (31) and a heat preservation sleeve (32), the inner part of the heat conduction sleeve (29) is provided with the electric heating film (30), the electric heating film (30) is connected with the second temperature controller (33) on the side of the butt joint nozzle (6) through a wire circuit, and the outer part of the heat conduction sleeve (29) is connected with the heat preservation sleeve (32) through the magic tape (31).

6. The precision plastic mold for plastic box of optical fiber cable according to claim 1, wherein, The inner core block (4) is provided with cavities for respectively penetrating the pen type electric telescopic rod (35) and the positioning rod, the top of the pen type electric telescopic rod (35) penetrates the cavity and is fixed with the bottom of the sampling top plate (5), and the outer part of the pen type electric telescopic rod (35) and the positioning rod is sleeved with the telescopic protective sleeve (34), the upper and lower ends of the telescopic protective sleeve (34) are respectively fixed with the opposite surfaces of the inner core block (4) and the sampling top plate (5), and the side of the sampling top plate (5) is fixed with a plurality of high-temperature-resistant sealing rings (36).

7. The precision plastic mold for plastic box of optical fiber cable according to claim 6, wherein, The bottom of the sampling top plate (5) is provided with a polyurethane buffer ring (37), and a pressure sensor (20) is arranged at the bottom of the sampling top plate (5).

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