Low-pressure forming die for earphone battery

Abstract

The utility model discloses an earphone battery low-pressure forming die which comprises an upper die, a lower die and a die strip, an installation groove is reserved between the upper die and the lower die, the die strip is provided with a limiting groove used for limiting a circuit board and a cavity used for placing a battery cell, the peripheral wall of the limiting groove is attached to the peripheral wall of the circuit board, and the peripheral wall of the middle section of the battery cell is attached to the inner wall of the cavity. Gaps are reserved between the two ends of the battery cell and the cavity to form injection molding grooves, runner grooves used for installing injection molding runners are reserved in the top walls of the mold strips, the runner grooves are communicated with the injection molding grooves, and when the circuit board is installed in the limiting groove, the circuit board separates the injection molding groove close to the negative electrode of the battery cell from the limiting groove; the cavity is provided with a connecting groove, the connecting groove is communicated with the injection molding grooves in the two ends, the periphery of the battery cell is provided with a connecting piece for pulling the positive electrode to the negative electrode, and the connecting groove directly faces the connecting piece. According to the utility model, the battery cover can be assembled and reinforced during injection molding, so that the assembly process can be simplified, and the cell processing efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of molds, and in particular to a low-pressure molding mold for earphone batteries. Background Technology

[0002] In the design of modern electronic devices, the demand for both compactness and functional integration is increasing. For battery cells, using a single-end output for both positive and negative terminals can significantly save internal space, allowing the product to accommodate more critical components while maintaining a compact form factor, thus improving overall performance. Simultaneously, single-end output facilitates wiring and connections, reduces complex wiring crossovers and interference, lowers the difficulty of circuit design and manufacturing, and contributes to improved product stability and reliability, thereby increasing production efficiency and product quality.

[0003] However, during the manufacturing and assembly process, to ensure the safe and stable operation of the battery, battery covers must be installed at both ends of the cell to prevent leakage. At the same time, to enable external connectivity, the circuit board for external connections needs to be precisely exposed. Due to the typically small overall size of the battery cell and limited assembly space, automated assembly equipment often struggles to accurately grasp and position the battery cover during installation due to the cell's unique design, frequently resulting in installation misalignment. Even with high-precision vision recognition systems, the complex structure and minute dimensions of the battery cell lead to recognition errors, frequently resulting in installation failures. Utility Model Content

[0004] This utility model provides a low-voltage molding die for an earphone battery, which assists in injection molding battery covers at both ends of the battery cell and can accurately expose the circuit board. The battery covers are directly assembled to both ends of the battery cell during the injection molding stage, which helps to simplify subsequent assembly operations.

[0005] This utility model provides a technical solution that adopts the following approach:

[0006] A low-voltage molding die for an earphone battery includes an upper die, a lower die, and a die strip. A mounting groove for the die strip is provided between the upper and lower dies. The die strip has a limiting groove for restricting a circuit board and a cavity for placing a battery cell. The limiting groove communicates with the cavity, and the peripheral wall of the limiting groove fits against the peripheral wall of the circuit board. The peripheral wall of the middle section of the battery cell fits against the inner wall of the cavity. A gap is left between the two ends of the battery cell and the cavity to form injection grooves. A flow channel groove for installing an injection runner is provided on the top wall of the die strip, and the flow channel groove communicates with the injection groove. When the circuit board is installed in the limiting groove, the circuit board separates the injection groove near the negative electrode of the battery cell from the limiting groove. The cavity has a connecting groove that connects the two injection grooves. A connecting piece is provided on the outer periphery of the battery cell to pull the positive electrode to the negative electrode, and the connecting groove is directly opposite the connecting piece.

[0007] The circuit board welded to the end of the battery cell is installed in the limiting groove, allowing the battery cell to be installed in the cavity. The battery cell is adjusted so that the connecting piece of the battery cell is aligned with the connecting groove. The inner wall of the cavity supports the battery cell, allowing the battery cell to be directly spaced from the injection grooves at both ends for injection molding. After the battery cell is installed, the runner is moved into the runner groove, and then the upper and lower molds are closed to inject the battery cover into the injection groove. The injection material flows to the connecting groove while filling the battery cover part, thus simultaneously injecting the battery cover at both ends of the battery cell and connecting the two battery covers together. This makes it difficult for the two battery covers to fall off the end of the battery cell after cooling and demolding. At the circuit board, due to the obstruction of the limiting groove, the injection material cannot flow to the peripheral wall of the circuit board, thus accurately exposing the circuit board. The assembly and reinforcement of the battery cover are completed at the same time as injection molding, which helps to simplify the assembly process and improve the efficiency of battery cell processing.

[0008] Preferably, a mounting plate is inserted into the mold strip, the limiting groove is recessed into one side of the mounting plate, and the mold strip is provided with a slot for inserting the mounting plate.

[0009] After the battery cell is installed on the mounting plate, the mounting plate is then connected to the battery cell plug and installed on the mold strip, making it easier to install the battery cell into the mold strip.

[0010] Preferably, the mounting plate includes two splicing parts, and the limiting groove is divided into two sub-grooves located on the sidewalls of the splicing parts respectively. Each of the two sub-grooves has an opening on the side closest to each other for inserting a circuit board, and the inner peripheral wall of the limiting groove has a blocking part for limiting the circuit board.

[0011] The circuit board is inserted through the opening of one of the slots, where the blocking part of the slot pre-fixes the circuit board. Then, another splicing part is spliced ​​onto the other side of the circuit board, so that the two slots are joined to form a complete limiting slot, which restricts the separation of the circuit board from the mounting plate. The mounting plate is then inserted into the slot of the mold strip, which restricts the separation of the two splicing parts of the mounting part. This allows the mounting part to firmly restrict the circuit board at the end of the battery cell, making the installation and limiting operation of the circuit board more convenient and improving the ease of setting up the battery cell and mold strip.

[0012] Preferably, the circuit board has heat dissipation holes extending through its own direction, and the heat dissipation holes extend through one side of the peripheral wall of the circuit board. The limiting groove is provided with a positioning block, and the positioning block is adapted to the heat dissipation holes.

[0013] The positioning block can prevent the injection molding material from flowing into the heat dissipation holes of the circuit board, and it can also limit the position of the heat dissipation holes, thereby limiting the direction of the circuit board. This makes it easier for the connecting piece to be aligned with the connecting slot and inserted, which helps to improve the efficiency of inserting the battery cell into the cavity.

[0014] Preferably, the mold strip is provided with multiple cavities, and the number of limiting grooves is set according to the number of cavities.

[0015] Multiple cavities can accommodate multiple battery cells, allowing the mold to simultaneously inject multiple battery covers, which helps improve the production efficiency of battery covers during mass production and reduces resource waste.

[0016] Preferably, the mold strip is detachably connected to the lower mold.

[0017] The mold strip is fixed to the lower mold with screws. When the previous mold strip is in the injection molding state, the worker can install the un-injected battery cell into the next mold strip, thereby effectively utilizing the waiting time and improving production efficiency.

[0018] Preferably, the mold strip is provided with support plates at both ends.

[0019] The support plate facilitates the movement of the mold strip.

[0020] In summary, this utility model has the following beneficial technical effects:

[0021] The circuit board welded to the end of the battery cell is installed in the limiting groove, allowing the battery cell to be installed in the cavity. The battery cell is adjusted so that the connecting piece of the battery cell is aligned with the connecting groove. The inner wall of the cavity supports the battery cell, allowing the battery cell to be directly spaced from the injection grooves at both ends for injection molding. After the battery cell is installed, the runner is moved into the runner groove, and then the upper and lower molds are closed to inject the battery cover into the injection groove. The injection material flows to the connecting groove while filling the battery cover part, thus simultaneously injecting the battery cover at both ends of the battery cell and connecting the two battery covers together. This makes it difficult for the two battery covers to fall off the end of the battery cell after cooling and demolding. At the circuit board, due to the obstruction of the limiting groove, the injection material cannot flow to the peripheral wall of the circuit board, thus accurately exposing the circuit board. The assembly and reinforcement of the battery cover are completed at the same time as injection molding, which helps to simplify the assembly process and improve the efficiency of battery cell processing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a low-pressure molding die for an earphone battery according to this utility model.

[0023] Figure 2 This is an exploded view of a low-pressure molding die for an earphone battery according to this utility model.

[0024] Figure 3 It is a schematic diagram used to illustrate the connection between the mounting plate and the battery cell. The diagram also shows the two states of the battery cell before and after injection molding.

[0025] Explanation of reference numerals in the attached drawings: 1. Upper mold; 2. Lower mold; 3. Mold strip; 4. Mounting groove; 5. Restriction groove; 6. Cavity; 7. Injection groove; 8. Runner groove; 9. Connecting piece; 10. Mounting plate; 11. Slot; 12. Joint; 13. Dividing groove; 14. Blocking part; 15. Heat dissipation hole; 16. Positioning block; 17. Support plate; 18. Positioning post; 19. Positioning slot; 20. Circuit board; 21. Battery cell; 22. Battery cover. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-3 The present invention will be described in further detail below.

[0027] This utility model discloses a low-pressure molding die for an earphone battery.

[0028] Reference Figure 1 as well as Figure 2 A low-voltage molding die for an earphone battery includes an upper die 1, a lower die 2, and a die strip 3. An mounting groove 4 for mounting the die strip 3 is provided between the upper die 1 and the lower die 2. The die strip 3 has a limiting groove 5 for limiting a circuit board 20 and a cavity 6 for placing a battery cell 21. The limiting groove 5 communicates with the cavity 6. The peripheral wall of the limiting groove 5 fits against the peripheral wall of the circuit board 20. The peripheral wall of the middle section of the battery cell 21 fits against the inner wall of the cavity 6. A gap is left between the two ends of the battery cell 21 and the cavity 6 to form an injection groove 7. The top wall of the die strip 3 has a flow channel groove 8 for installing an injection flow channel, which communicates with the injection groove 7. When the circuit board 20 is installed in the limiting groove 5, the circuit board 20 separates the injection groove 7 near the negative electrode of the battery cell 21 from the limiting groove 5. The cavity 6 has a connecting groove that connects to the two ends of the injection groove 7. The outer periphery of the battery cell 21 has a connecting piece 9 that pulls the positive electrode to the negative electrode, and the connecting groove is directly opposite the connecting piece 9.

[0029] The circuit board 20, soldered to the end of the battery cell 21, is installed in the limiting groove 5, so that the battery cell 21 is installed in the cavity 6. The battery cell 21 is adjusted so that the connecting piece 9 of the battery cell 21 is aligned with the connecting groove. The inner wall of the cavity 6 supports the battery cell 21, so that the battery cell 21 can be directly separated from the injection grooves 7 at both ends for injection molding. After the battery cell 21 is installed, the runner is moved into the runner groove 8, and then the upper mold 1 and the lower mold 2 are closed to inject the battery cover 22 into the injection groove 7. The injection material fills the battery cover 22. Simultaneously, the material flows to the connecting groove for injection molding, thereby simultaneously molding battery covers 22 at both ends of the battery cell 21 and connecting the two battery covers 22 together. This makes it difficult for the two battery covers 22 to fall off the ends of the battery cell 21 after cooling and demolding. At the circuit board 20, due to the obstruction of the limiting groove 5, the injection material cannot flow to the periphery of the circuit board 20, thus accurately exposing the circuit board 20. The assembly and reinforcement of the battery covers 22 are completed at the same time as injection molding, which helps to simplify the assembly process and improve the processing efficiency of the battery cell 21.

[0030] Reference Figure 2 as well as Figure 3 In this embodiment, a mounting plate 10 is inserted into the mold strip 3, a limiting groove 5 is recessed into one side of the mounting plate 10, and a slot 11 for inserting the mounting plate 10 is provided on the mold strip 3.

[0031] After the battery cell 21 is installed on the mounting plate 10, the mounting plate 10 is then connected to the battery cell 21 and installed on the mold strip 3, making it easier to install the battery cell 21 into the mold strip 3.

[0032] Reference Figure 2 as well as Figure 3 In this embodiment, the mounting plate 10 includes two splicing parts 12, and the limiting groove 5 is divided into two sub-grooves 13 located on the side wall of the splicing part 12 respectively. The two sub-grooves 13 have openings on the side that are close to each other for the circuit board 20 to be inserted. The inner peripheral wall of the limiting groove 5 has a blocking part 14 for limiting the circuit board 20.

[0033] The circuit board 20 is inserted through the opening of one of the slots 13, where the blocking part 14 of the slot 13 pre-fixes the circuit board 20. Then, another splicing part 12 is spliced ​​onto the other side of the circuit board 20, so that the two slots 13 are spliced ​​to form a complete limiting slot 5, which restricts the separation of the circuit board 20 from the mounting plate 10. Then, the mounting plate 10 is inserted into the slot 11 of the mold strip 3. The slot 11 restricts the separation of the two splicing parts 12 of the mounting part, so that the mounting part can firmly restrict the circuit board 20 at the end of the cell 21, making the installation and limiting operation of the circuit board 20 more convenient and improving the ease of setting up the cell 21 and the mold strip 3.

[0034] Reference Figure 2 as well as Figure 3 In this embodiment, the circuit board 20 has a heat dissipation hole 15 extending through it along its own direction. The heat dissipation hole 15 extends through one side of the peripheral wall of the circuit board 20. A positioning block 16 is provided in the limiting groove 5, and the positioning block 16 is adapted to the heat dissipation hole 15.

[0035] The positioning block 16 can block the injection molding material from flowing into the heat dissipation hole 15 of the circuit board 20, and can also limit the position of the heat dissipation hole 15, thereby limiting the direction of the circuit board 20, making it easier for the connecting piece 9 to be aligned with the connecting groove and inserted, which is beneficial to improving the efficiency of inserting the battery cell 21 into the cavity 6.

[0036] Reference Figure 2 as well as Figure 3 In this embodiment, the mold strip 3 is provided with multiple cavities 6, and the number of limiting grooves 5 is set according to the cavity 6.

[0037] Multiple cavities 6 can accommodate multiple battery cells 21, allowing the mold to simultaneously inject multiple battery covers 22, which helps improve the production efficiency of battery covers 22 during mass production and reduces resource waste.

[0038] Reference Figure 2 as well as Figure 3 In this embodiment, the mold strip 3 and the lower mold 2 are detachably connected.

[0039] The mold strip 3 is fixed to the lower mold 2 by screws. When the previous mold strip 3 is in the injection molding state, the worker can install the un-injected battery cell 21 into the next mold strip 3, thereby effectively utilizing the waiting time and improving production efficiency.

[0040] Reference Figure 2 as well as Figure 3 In this embodiment, the mold strip 3 is provided with support plates 17 at both ends. The support plates 17 facilitate the removal and insertion of the mold strip 3.

[0041] The lower mold 2 is also provided with a positioning post 18, and the side wall of the mold strip 3 is provided with a positioning slot 19 for the positioning post 18 to be inserted. The positioning post 18 and the positioning slot 19 cooperate to restrict the position of the mold strip 3 and prevent the mold strip 3 from sliding along the lower mold 2.

[0042] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A low-voltage molding die for an earphone battery, characterized in that: The device includes an upper mold, a lower mold, and a mold strip. A mounting groove for the mold strip is provided between the upper and lower molds. The mold strip has a limiting groove for restricting the circuit board and a cavity for placing the battery cell. The limiting groove communicates with the cavity, and the peripheral wall of the limiting groove fits against the peripheral wall of the circuit board. The peripheral wall of the middle section of the battery cell fits against the inner wall of the cavity. A gap is left between the two ends of the battery cell and the cavity to form injection grooves. The top wall of the mold strip has a runner groove for installing injection channels, and the runner groove communicates with the injection grooves. When the circuit board is installed in the limiting groove, the circuit board separates the injection groove near the negative electrode of the battery cell from the limiting groove. The cavity has a connecting groove that connects the two injection grooves. A connecting piece is provided on the outer periphery of the battery cell to pull the positive electrode to the negative electrode, and the connecting groove is directly opposite the connecting piece.

2. The low-voltage molding die for an earphone battery according to claim 1, characterized in that: A mounting plate is inserted into the mold strip, the limiting groove is recessed into one side of the mounting plate, and the mold strip is provided with a slot for inserting the mounting plate.

3. The low-voltage molding die for an earphone battery according to claim 2, characterized in that: The mounting plate includes two splicing parts. The limiting groove is divided into two sub-grooves located on the sidewalls of the splicing parts. Each of the two sub-grooves has an opening on the side closest to each other for inserting a circuit board. The inner peripheral wall of the limiting groove has a blocking part for limiting the circuit board.

4. The low-pressure molding die for an earphone battery according to claim 3, characterized in that: The circuit board has heat dissipation holes running through it, which extend through one side of the circuit board's peripheral wall. A positioning block is provided in the limiting groove, and the positioning block is adapted to the heat dissipation holes.

5. The low-voltage molding die for an earphone battery according to claim 1, characterized in that: The mold strip is provided with multiple cavities, and the number of limiting grooves is set according to the cavities.

6. The low-voltage molding die for an earphone battery according to claim 1, characterized in that: The mold strip is detachably connected to the lower mold.

7. The low-voltage molding die for an earphone battery according to claim 6, characterized in that: The mold strip is provided with support plates at both ends.

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