Injection mold for an electric bicycle helmet

Abstract

The application provides an injection mold for an electric bicycle helmet, which comprises a lower mold, a core arranged on the top of the lower mold, and a ejector plate arranged on the bottom of the lower mold. The core comprises a forming part and two movable parts arranged on the left and right sides of the forming part. The left and right sides of the forming part are provided with inclined guide surfaces. The side of the movable part close to the forming part is provided with an inclined abutting surface. An inclined sliding hole is arranged through the opposite position of the movable part. A connecting rod is arranged in the inclined sliding hole in a sliding manner. The top of the connecting rod is fixedly connected with the movable part. The top of the connecting rod is movably connected with the ejector plate. In use, the ejector plate is driven to move upward by a driving element such as an oil cylinder. In the process of moving upward of the ejector plate, the ejector plate drives the movable part to move upward through the connecting rod, so as to separate the formed helmet body from the core. At the same time, the distance between the two movable parts is gradually reduced, so that the demolding process of the electric bicycle helmet is not easily affected.

Description

Technical Field

[0001] This invention relates to injection molds, and more particularly, to an injection mold for an electric bicycle helmet. Background Technology

[0002] Currently, existing electric bicycle helmets, such as Figure 1 As shown, the helmet includes a helmet body 23. The distance between the left and right inner walls of the helmet body 23 gradually decreases from the middle to the upper and lower ends. An opening 24 is provided at the bottom of the helmet body 23, and the opening 24 communicates with the inner cavity of the helmet body 23. However, when using an injection mold to produce the above-mentioned electric bicycle helmet, the core inserted into the helmet body can jam the helmet body 23, affecting the demolding process of the electric bicycle helmet. Summary of the Invention

[0003] In view of this, the purpose of this invention is to provide an injection mold for electric bicycle helmets, which has the advantage that the demolding process of electric bicycle helmets is not easily affected.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: an injection mold for an electric bicycle helmet, comprising a lower mold, a core disposed on the top of the lower mold, and an ejector plate disposed on the bottom of the lower mold. The core includes a molding part and two movable parts slidably disposed on the left and right sides of the molding part. Inclined guide surfaces are provided on both the left and right sides of the molding part, and the distance between the two inclined guide surfaces gradually decreases from bottom to top. An inclined fitting surface is provided on the side of the movable part near the molding part, and the inclined fitting surface is in close contact with the inclined guide surface. An inclined sliding hole is provided through the lower mold at the position opposite to the movable part. The inclination angle of the inclined sliding hole is the same as the inclination angle of the inclined guide surface. A connecting rod is slidably disposed in the inclined sliding hole. The top of the connecting rod is fixedly connected to the movable part, and the top of the connecting rod is movably connected to the ejector plate.

[0005] With the above technical solution, when the helmet body cools and forms in the mold cavity, the upper mold and lower mold are first separated, and then the ejector plate is driven to move upward by driving components such as hydraulic cylinders. During the upward movement of the ejector plate, the ejector plate will drive the movable part to move upward through the connecting rod, thereby pushing the formed helmet body away from the core. At the same time, the distance between the two movable parts gradually decreases, making the demolding process of the electric bicycle helmet less susceptible to interference.

[0006] Preferably, a T-shaped guide groove is provided on the inner wall of the inclined sliding hole, and a T-shaped guide block is provided on the outer wall of the connecting rod, the T-shaped guide block being slidably connected in the T-shaped guide groove.

[0007] Through the above technical solution, the T-shaped guide groove and the T-shaped guide block cooperate with each other to ensure that the inclined guide surface and the inclined mating surface are always in close contact.

[0008] Preferably, the outer wall of the connecting rod is provided with a mounting groove, and the end of the T-shaped guide block is provided with a mounting plate, which is pressed and fixed in the mounting groove by screws.

[0009] With the above technical solution, the mounting plate is fixed in the mounting groove by screws, making the disassembly and assembly of the T-shaped guide block more convenient and quick.

[0010] Preferably, the top of the ejector plate is provided with a drive seat, the top of the drive seat is provided with a sliding groove, the sliding groove coincides with the orthographic projection of the connecting rod, a sliding seat is slidably connected in the sliding groove, the bottom of the connecting rod is rotatably connected to the sliding seat, and the rotation axis of the connecting rod is perpendicular to the sliding groove.

[0011] With the above technical solution, the bottom of the connecting rod is rotatably connected to the sliding seat, and the sliding seat is slidably connected to the drive seat. In this way, the connecting rod is less likely to get stuck when the ejector plate drives the connecting rod to move upward.

[0012] Preferably, the top of the ejector plate has a placement groove, and the sliding seat is pressed and fixed in the placement groove by screws.

[0013] With the above technical solution, the sliding seat is fixed in the placement groove by screws, which has the advantage of being easy to disassemble and assemble.

[0014] Preferably, the connecting rod includes a sliding section passing through the inclined sliding hole, an extension section inserted and fixed to the sliding section, and a connecting section rotatably sleeved on the extension section, wherein the connecting section is rotatably connected to the sliding seat.

[0015] The above technical solution, which consists of a sliding section, an extension section and a connecting section, has the advantages of requiring less raw materials and having lower production costs.

[0016] Preferably, the sidewall of the connecting section is provided with a plurality of heat dissipation grooves, and the plurality of heat dissipation grooves are interleaved.

[0017] Through the above technical solution, the interlaced heat dissipation grooves have a larger contact area, which can dissipate heat quickly and help to form the electric bicycle helmet.

[0018] Preferably, the connecting rod has a cooling channel inside, and a cooling connector is provided at the bottom of the connecting rod. The inlet and outlet of the cooling connector are respectively connected to the two ends of the cooling channel.

[0019] With the above technical solution, cooling water can be injected into the cooling channel by a water pump during use, which further improves heat dissipation efficiency and the molding efficiency of electric bicycle helmets.

[0020] Preferably, the molding part includes a driving block and a sliding block. The rear side of the driving block is provided with an upwardly inclined driving slope. The sliding block is located on the rear side of the driving block. The front side of the sliding block is provided with a downwardly inclined guiding slope. A limiting mechanism is provided between the driving block and the sliding block. The limiting mechanism is used to drive the guiding slope to always be in close contact with the driving slope. The top of the ejector plate is provided with a demolding ejector pin, which passes through the driving block upward.

[0021] Through the above technical solution, during the upward movement of the ejector plate, the ejector plate applies an upward pushing force to the helmet body through the demolding ejector pins, thereby assisting in the demolding of the helmet body. At the same time, because the inner wall of the helmet body abuts against the bottom of the sliding block, the helmet body will drive the sliding block to move upward. Under the action of the limiting mechanism, the sliding block will slide along the guide slope, causing the sliding block to separate from the helmet body. In this way, the demolding process of the electric bicycle helmet is not easily affected.

[0022] Preferably, the limiting mechanism includes a T-shaped positioning groove formed in the middle of the driving inclined surface and a T-shaped positioning block disposed in the middle of the guiding inclined surface, wherein the T-shaped positioning block is slidably connected in the T-shaped positioning groove.

[0023] Through the above technical solution, the T-shaped positioning groove and the T-shaped positioning block cooperate with each other to ensure that the driving inclined surface and the guiding inclined surface are always in close contact. Moreover, the T-shaped positioning groove and the T-shaped positioning block cooperate with each other to limit and guide the sliding of the sliding block. Attached Figure Description

[0024] Figure 1 This is a structural diagram of an electric bicycle helmet; Figure 2 This is a schematic diagram of the structure of Embodiment 1; Figure 3 Localized explosion in Example 1 Figure 1 ; Figure 4 Localized explosion in Example 1 Figure 2 ; Figure 5 Localized explosion in Example 1 Figure 3 ; Figure 6 This is a schematic diagram of the structure of the movable part in Embodiment 1; Figure 7 This is a cross-sectional schematic diagram of Example 2.

[0025] Reference numerals: 1. Lower mold; 2. Ejector plate; 3. Core; 31. Molding part; 311. Drive block; 312. Sliding block; 32. Moving part; 4. Inclined guide surface; 5. Inclined mating surface; 6. Inclined sliding hole; 7. Connecting rod; 71. Sliding section; 72. Extension section; 73. Connecting section; 8. T-shaped guide groove; 9. T-shaped guide block; 10. Mounting groove; 11. Mounting plate; 12. Drive seat; 13. Sliding part 14. Moving groove; 15. Sliding seat; 16. Placement groove; 17. Heat dissipation groove; 18. Cooling channel; 19. Cooling connector; 20. Driving ramp; 21. Guiding ramp; 22. Restriction mechanism; 211. T-shaped positioning groove; 212. T-shaped positioning block; 23. Ejector pin; 24. Helmet body; 25. Opening; 26. Movable opening; 27. Movable rod; 28. Movable hole; 29. ​​Connecting column; 20. Arc hook. Implementation

[0026] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and mastered. Example

[0027] An injection mold for an electric bicycle helmet, such as Figures 2 to 6 As shown, it includes a lower mold 1, a core 3 disposed on the top of the lower mold 1, and an ejector plate 2 disposed at the bottom of the lower mold 1.

[0028] The core 3 includes a molding part 31 and two movable parts 32 slidably disposed on the left and right sides of the molding part 31. Inclined guide surfaces 4 are provided on both the left and right sides of the molding part 31, and the distance between the two inclined guide surfaces 4 gradually decreases from bottom to top. An inclined contact surface 5 is provided on the side of the movable part 32 closest to the molding part 31, and the inclined contact surface 5 is in close contact with the inclined guide surface 4.

[0029] An inclined sliding hole 6 is provided through the lower mold 1 at the position opposite to the movable part 32. The inclination angle of the inclined sliding hole 6 is the same as the inclination angle of the inclined guide surface 4. A connecting rod 7 is slidably arranged in the inclined sliding hole 6. The top of the connecting rod 7 is fixedly connected to the movable part 32, and the top of the connecting rod 7 is movably connected to the ejector plate 2.

[0030] A T-shaped guide groove 8 is provided on the inner wall of the inclined sliding hole 6, and a T-shaped guide block 9 is provided on the outer wall of the connecting rod 7. The T-shaped guide block 9 is slidably connected in the T-shaped guide groove 8. A mounting groove 10 is provided on the outer wall of the connecting rod 7, and a mounting plate 11 is provided at the end of the T-shaped guide block. The mounting plate 11 is fixed in the mounting groove 10 by screws.

[0031] The top of the ejector plate 2 is provided with a drive seat 12, and the top of the drive seat 12 has a sliding groove 13. The sliding groove 13 coincides with the orthographic projection of the connecting rod 7. A sliding seat 14 is slidably connected in the sliding groove 13. The bottom of the connecting rod 7 is rotatably connected to the sliding seat 14, and the rotation axis of the connecting rod 7 is perpendicular to the sliding groove 13. The top of the ejector plate 2 has a placement groove 15, and the sliding seat 14 is pressed and fixed in the placement groove 15 by screws.

[0032] The connecting rod 7 includes a sliding section 71 that passes through the inclined sliding hole 6, an extension section 72 that is inserted and fixed to the sliding section 71, and a connecting section 73 that is rotatably sleeved on the extension section 72. The connecting section 73 is rotatably connected to the sliding seat 14. Several heat dissipation grooves 16 are provided on the side wall of the connecting section 73, and the several heat dissipation grooves 16 are interleaved with each other.

[0033] The connecting rod 7 has a cooling channel 17 inside, and a cooling connector 18 is provided at the bottom of the connecting rod 7. The inlet and outlet of the cooling connector 18 are respectively connected to the two ends of the cooling channel 17.

[0034] The molding section 31 includes a driving block 311 and a sliding block 312. The driving block 311 has an upward-sloping driving ramp 19 on its rear side. The sliding block 312 is located on the rear side of the driving block 311, and the sliding block 312 has a downward-sloping guiding ramp 20 on its front side. A limiting mechanism 21 is provided between the driving block 311 and the sliding block 312. The limiting mechanism 21 is used to ensure that the guiding ramp 20 is always in close contact with the driving ramp 19. A demolding ejector pin 22 is provided on the top of the ejector plate 2, and the demolding ejector pin 22 passes upward through the driving block 311. The limiting mechanism 21 includes a T-shaped positioning groove 211 formed in the middle of the driving ramp 19 and a T-shaped positioning block 212 formed in the middle of the guiding ramp 20. The T-shaped positioning block 212 is slidably connected in the T-shaped positioning groove 211. Example

[0035] The difference between Example 2 and Example 1 is that, as Figure 7As shown, the movable part 32 has a movable opening 25 on its side wall away from the molding part 31. One end of the movable opening 25 engages with the edge of the mold cavity, and the other end extends away from the mold cavity. A movable rod 26 is provided in the movable opening 25, and the outer wall of the movable rod 26 fits against the inner wall of the movable opening 25. In use, the movable rod 26 can move freely in the movable opening 25. A movable hole 27 is provided in the extension direction of the outer wall of the movable rod 26. A connecting post 28 is provided in the inner wall of the movable opening 25. The connecting post 28 extends into the movable hole 27, and the outer wall of the connecting post 28 abuts against the interior of the movable hole 27. In use, the connecting post 28 can slide along the length direction of the movable hole 27, and can also rotate circumferentially within the movable hole 27. An arc-shaped hook 29 is provided at the end of the movable rod 26. When the movable part 32 lifts the molded electric bicycle helmet, the arc-shaped hook 29 extends into the through hole on the side of the electric bicycle helmet to limit the helmet's position, ensuring that the helmet is pressed tightly against the movable part 32. As the movable part 32 moves upward, it forces the movable rod 26 to rotate counterclockwise via the connecting post 28, causing the arc-shaped hook 29 to gradually move out of the through hole on the side of the helmet. When the movable part 32 reaches its limit position, the side wall of the movable part 32 is misaligned with the opening at the bottom of the helmet, and the arc-shaped hook 29 separates from the through hole on the side wall. At this point, the helmet can be easily removed, completing the demolding process. Of course, the above is only a typical example of the present invention. In addition, the present invention can have many other specific embodiments. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. An injection mold for an electric bicycle helmet, comprising a lower mold (1), a core (3) disposed on the top of the lower mold (1), and an ejector plate (2) disposed on the bottom of the lower mold (1), characterized in that: The core (3) includes a molding part (31) and two movable parts (32) slidably disposed on the left and right sides of the molding part (31). The molding part (31) is provided with inclined guide surfaces (4) on both the left and right sides, and the distance between the two inclined guide surfaces (4) gradually decreases from bottom to top. The movable part (32) is provided with an inclined fitting surface (5) on the side close to the molding part (31). The inclined fitting surface (5) is in close contact with the inclined guide surface (4). The lower mold (1) is provided with an inclined sliding hole (6) through the movable part (32) opposite to it. The inclined angle of the inclined sliding hole (6) is the same as the inclined angle of the inclined guide surface (4). A connecting rod (7) is slidably disposed in the inclined sliding hole (6). The top of the connecting rod (7) is fixedly connected to the movable part (32). The top of the connecting rod (7) is movably connected to the ejector plate (2). The molding part (31) includes a driving block (311) and a sliding block (312). The rear side of the driving block (311) is provided with an upwardly inclined driving slope (19). The sliding block (312) is located on the rear side of the driving block (311). The front side of the sliding block (312) is provided with an downwardly inclined guiding slope (20). A limiting mechanism (21) is provided between the driving block (311) and the sliding block (312). The limiting mechanism (21) is used to drive the guiding slope (20) to always be close to the driving slope (19). The top of the ejector plate (2) is provided with a demolding ejector pin (22). The demolding ejector pin (22) passes through the driving block (311) upward. The movable part (32) has a movable opening (25) on the side wall away from the molding part (31). A movable rod (26) is provided in the movable opening (25). A movable hole (27) is provided on the outer wall of the movable rod (26). A connecting post (28) is provided on the inner wall of the movable opening (25). The connecting post (28) extends into the movable hole (27). An arc-shaped hook (29) is provided at the end of the movable rod (26).

2. The injection mold for an electric bicycle helmet according to claim 1, characterized in that: The inner wall of the inclined sliding hole (6) is provided with a T-shaped guide groove (8), and the outer wall of the connecting rod (7) is provided with a T-shaped guide block (9), which is slidably connected in the T-shaped guide groove (8).

3. The injection mold for an electric bicycle helmet according to claim 2, characterized in that: The connecting rod (7) has an installation groove (10) on its outer wall, and the end of the T-shaped guide block (9) is provided with an installation plate (11), which is fixed in the installation groove (10) by screws.

4. The injection mold for an electric bicycle helmet according to claim 1, characterized in that: The top of the ejector plate (2) is provided with a drive seat (12), and the top of the drive seat (12) is provided with a sliding groove (13). The sliding groove (13) coincides with the orthographic projection of the connecting rod (7). A sliding seat (14) is slidably connected in the sliding groove (13). The bottom of the connecting rod (7) is rotatably connected to the sliding seat (14), and the rotation axis of the connecting rod (7) is perpendicular to the sliding groove (13).

5. The injection mold for an electric bicycle helmet according to claim 4, characterized in that: The top of the ejector plate (2) is provided with a placement groove (15), and the sliding seat (14) is fixed in the placement groove (15) by screws.

6. The injection mold for an electric bicycle helmet according to claim 4, characterized in that: The connecting rod (7) includes a sliding section (71) passing through the inclined sliding hole (6), an extension section (72) inserted and fixed to the sliding section (71), and a connecting section (73) rotatably sleeved on the extension section (72). The connecting section (73) is rotatably connected to the sliding seat (14).

7. The injection mold for an electric bicycle helmet according to claim 6, characterized in that: The connecting section (73) has several heat dissipation grooves (16) on its side wall, and the heat dissipation grooves (16) are interleaved.

8. The injection mold for an electric bicycle helmet according to claim 1, characterized in that: The connecting rod (7) has a cooling channel (17) inside, and a cooling connector (18) is provided at the bottom of the connecting rod (7). The inlet and outlet of the cooling connector (18) are respectively connected to the two ends of the cooling channel (17).

9. The injection mold for an electric bicycle helmet according to claim 1, characterized in that: The limiting mechanism (21) includes a T-shaped positioning groove (211) formed in the middle of the driving inclined surface (19) and a T-shaped positioning block (212) set in the middle of the guiding inclined surface (20), wherein the T-shaped positioning block (212) is slidably connected in the T-shaped positioning groove (211).

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