Earphone shell injection mold

Abstract

The invention belongs to the technical field of plastic shell injection molding, and particularly relates to an earphone shell injection mold which comprises an upper mold base and a lower mold base, the upper mold base is hollow and provided with a mold cavity, the lower mold base is provided with a male mold, the interior of the male mold is of a hollow structure, the mold cavity is provided with a feeding pipe, and the upper mold base is provided with a first cooling mechanism. The first cooling mechanism comprises a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe and the liquid outlet pipe are each provided with a first switch valve, the lower die base is provided with a second cooling mechanism, the second cooling mechanism comprises a liquid inlet channel, a liquid cavity, a liquid filling channel and a liquid outlet channel, the liquid inlet channel communicates with the interior of the male die, and the two ends of the liquid filling channel communicate with the liquid cavity and the male die correspondingly. The liquid discharging channel is communicated with the upper side of the liquid cavity, and the liquid inlet channel and the liquid discharging channel are each provided with a second switch valve; cooling can be synchronously conducted from the inner side and the outer side, compared with a traditional outer side cooling mode, better cooling forming efficiency is achieved, and the production efficiency of earphone shell injection molding is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of plastic shell injection molding, and particularly relates to an injection mold for an earphone shell. Background Art

[0002] With the development of wireless technology, wireless earphones have developed rapidly. The advantage of wireless earphones is that they do not need to use a wire to connect to a multimedia player, but use a wireless signal to connect to the multimedia player, making it more convenient to use. Existing wireless earphones include an earphone body and an earphone charging shell. When processing the charging shell as shown in the attached Figure 1 figure, existing methods mostly involve injection molding, that is, making a pair of upper and lower molds, and forming the injection molding raw material into a shell through the cavity formed by the upper and lower molds.

[0003] During the injection molding process, people often use water cooling to accelerate cooling, thereby improving the molding efficiency and increasing the output. However, during water cooling, cooling is only carried out on the outside of the molding cavity, resulting in uneven cooling. For this reason, we propose an injection mold for an earphone shell. Summary of the Invention

[0004] The purpose of the present invention is to provide an injection mold for an earphone shell to solve the problems existing in the background art.

[0005] To achieve the above technical purpose, the technical solution adopted by the present invention is as follows: An injection mold for an earphone shell includes an upper mold base and a lower mold base. The interior of the upper mold base is hollow, and several concave mold cavities are processed at the bottom. On the upper surface of the lower mold base, several convex molds corresponding to the mold cavities are processed, and the interior of the convex mold is a hollow structure; In the middle of the top of each of the mold cavities, a feed pipe is provided. Each feed pipe extends upward and penetrates the top of the upper mold base. The upper mold base is provided with a first cooling mechanism, and the first cooling mechanism includes a liquid inlet pipe and a liquid discharge pipe installed on both sides of the upper mold base. The liquid inlet pipe and the liquid discharge pipe are both provided with a first on-off valve; The lower mold base is provided with several second cooling mechanisms corresponding to the convex molds respectively. Each of the second cooling mechanisms includes a liquid inlet channel, a liquid cavity, a liquid filling channel, and a liquid discharge channel opened inside the lower mold base. The liquid inlet channel is connected to the inside of the convex mold. The liquid cavity is located below the convex mold. Both ends of the liquid filling channel are connected to the upper side of the liquid cavity and the bottom of the convex mold respectively. The liquid discharge channel is connected to the upper side of the liquid cavity; The liquid inlet channel and the liquid discharge channel of each of the second cooling mechanisms are both provided with a second on-off valve.

[0006] A base is fixedly installed at the bottom of the lower die holder. A number of vertical positioning platforms are machined on both sides of the upper die holder. The base is fixedly connected with a number of vertical positioning rods, and each of the vertical positioning rods respectively slides through each of the vertical positioning platforms.

[0007] The upper ends of all the vertical positioning rods are fixedly connected together with a top platform.

[0008] A number of sliding cavities are also formed at the bottom of the lower die holder, each of which is located below the liquid cavity. A number of discharging mechanisms corresponding to each of the punch dies are arranged inside the lower die holder. Each of the discharging mechanisms includes a counterweight ejecting rod and a triggering assembly. The counterweight ejecting rod is vertically arranged and sequentially penetrates upward through the sliding cavity, the liquid cavity and the punch die. The upper end surface of the counterweight ejecting rod is flush with the upper end surface of the punch die. An iron sheet which is slidably connected with the two side walls of the sliding cavity is arranged at the lower end of the counterweight ejecting rod. Limiting strips corresponding to the two sides of the bottom of the iron sheet are machined at the bottom of the sliding cavity. The triggering assembly is used to trigger the ejecting action of the counterweight ejecting rod.

[0009] The triggering assembly includes two elastic connecting pieces, a sliding plate, two connecting rods and a magnet block. Installation grooves are formed on both sides at the top of the liquid cavity. The two elastic connecting pieces are respectively installed in the installation grooves on both sides. The sliding plate is slidably arranged inside the liquid cavity and is in sliding seal with the liquid cavity. The lower ends of the two elastic connecting pieces are fixedly connected with the sliding plate together. The two connecting rods are fixedly arranged at the bottom of the sliding plate and slide downward through to the inside of the sliding cavity. The lower ends of the two connecting rods are fixedly connected with the magnet block together. A gap exists between the magnet block and the two side walls of the sliding cavity. Separation strips are fixedly arranged on the two side walls of the sliding cavity.

[0010] In the initial state when the liquid cavity is not filled with liquid, the sliding plate is located in the middle of the liquid cavity through the two elastic connecting pieces, and the magnet block is located above the iron sheet. The height distance between the magnet block and the iron sheet is not greater than the height distance between the sliding plate and the lower side of the liquid cavity.

[0011] First guide sleeves matching with the counterweight ejecting rod are arranged inside both the sliding cavity and the punch die.

[0012] A number of groups of spring rods corresponding to each of the die cavities are also installed on the top platform. The movable ends of the spring rods all extend downward and slide through to be flush with the inner end surface of the die cavity. A limiting frame is jointly arranged at the movable ends of each group of spring rods. A second guide sleeve matching with the spring rods is arranged between the top of the punch die and the inner wall of the top of the upper die holder. The height spacing between the limit frame and the upper die base is equal to the height stroke of the mold cavity completely disengaging from the punch upward.

[0013] When the mold of the present invention performs a cooling operation, the first switching valve of the drain pipe and the second switching valves of each drain channel are closed, and at the same time, the first switching valve of the liquid inlet pipe and the second switching valves of each liquid inlet channel are opened. Then, cooling water can enter the interior of the upper die base through the liquid inlet pipe and enter each punch through each liquid inlet channel, so that the cooling water fills the interior of the upper die base and each punch. In this way, when cooling and molding the injection molding raw material, cooling can be carried out synchronously from both the inside and the outside. Compared with the traditional external cooling method, it has better cooling and molding efficiency and improves the production efficiency of headphone shell injection molding. Brief Description of the Drawings

[0014] The present invention can be further illustrated by the non-limiting embodiments given in the drawings.

[0015] Figure 1 It is a schematic structural diagram of a headphone shell; Figure 2 It is a schematic structural diagram of Embodiment 1 of the present invention; Figure 3 It is a schematic cross-sectional structural diagram of Embodiment 1 of the present invention; Figure 4 It is a schematic structural diagram of Embodiment 2 of the present invention; Figure 5 It is a schematic cross-sectional structural diagram of Embodiment 2 of the present invention when the liquid cavity is not filled with water; Figure 6 It is Figure 5 an enlarged schematic diagram of the structure at A of Figure 7 It is a schematic cross-sectional structural diagram of Embodiment 2 of the present invention when the liquid cavity is filled with water; Figure 8 It is Figure 7 an enlarged schematic diagram of the structure at B of The main element symbols are explained as follows: Upper die base 100, mold cavity 101, feed pipe 102, liquid inlet pipe 103, drain pipe 104, first switching valve 105, lower die base 110, punch 111, liquid inlet channel 112, liquid cavity 113, liquid filling channel 114, drain channel 115, second switching valve 116, base 120, vertical positioning platform 121, vertical positioning rod 122, top platform 123; Sliding cavity 200, counterweight ejector rod 201, iron sheet 202, limiting strip 203, elastic connecting piece 210, sliding plate 211, connecting rod 212, magnet block 213, installation groove separating strip 214, first guide sleeve 215, spring rod 220, limit frame 221, second guide sleeve 222. Detailed implementation mode

[0016] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Embodiment 1, as Figure 2 and Figure 3 shown, a kind of injection mold for earphone housing, including an upper mold base 100 and a lower mold base 110. The upper mold base 100 is hollow inside and several concave mold cavities 101 are processed at the bottom. Several convex molds 111 corresponding to the mold cavities 101 respectively are processed on the upper surface of the lower mold base 110, and the inside of the convex mold 111 is a hollow structure; As Figure 3 shown, after the upper mold base 100 and the lower mold base 110 are closed, the convex mold 111 is inserted into the mold cavity 101 to form a molding cavity for the earphone housing; A feed pipe 102 is arranged in the middle of the top of each mold cavity 101. Each feed pipe 102 extends upward and penetrates through the top of the upper mold base 100. The upper mold base 100 is provided with a first cooling mechanism. The first cooling mechanism includes a liquid inlet pipe 103 and a liquid discharge pipe 104 installed on both lateral sides of the upper mold base 100. First switching valves 105 are arranged on both the liquid inlet pipe 103 and the liquid discharge pipe 104; The lower mold base is provided with several second cooling mechanisms corresponding to the respective convex molds 111. Each second cooling mechanism includes a liquid inlet channel 112, a liquid cavity 113, a liquid filling channel 114 and a liquid discharge channel 115 opened inside the lower mold base 110. The liquid inlet channel 112 is communicated with the inside of the convex mold 111. The liquid cavity 113 is located below the convex mold 111. Both ends of the liquid filling channel 114 are communicated with the upper side of the liquid cavity 113 and the bottom of the convex mold 111 respectively. The liquid discharge channel 115 is communicated with the upper side of the liquid cavity 113; Second switching valves 116 are arranged on both the liquid inlet channel 112 and the liquid discharge channel 115 of each second cooling mechanism.

[0018] In this embodiment, the upper mold base 100 is movable up and down, and the lower mold base 110 is fixed. The mold can be closed by moving the upper mold base 100 downward, and the mold can be opened by moving the upper mold base 100 upward. The equipment or device for driving the upper mold base 100 to move up and down is prior art and will not be specifically described herein; When performing the injection molding operation of the earphone housing, the upper mold base 100 is moved downward to be closed with the lower mold base 110. At this time, as Figure 3 shown, a molding cavity for the earphone housing is jointly formed between the concave mold cavity 101 and the convex mold 111. At the same time, in this embodiment, the feed pipe 102 is used to introduce the molten injection molding raw material. By introducing the injection molding raw material into each feed pipe 102 according to the required amount, the injection molding raw material can enter the formed molding cavity; After the injection molding raw material enters, the cooling and forming step can be started. In this embodiment, the height position of the liquid inlet pipe 103 is not fixed and can be set as required. The drain pipe 104 is preferably installed on the lower side of the upper mold base 100, so that the upper mold base 100 can drain the water inside by means of gravity drainage; the drain channel 115 preferably vertically penetrates the bottom of the lower mold base 110 downward from the upper side of the liquid cavity 113, so that the punch 111 can drain the water inside by means of gravity drainage; the liquid inlet pipe 103 of the upper mold base 100 and the liquid inlet channel 112 of the lower mold base 110 are both connected to an external cooling water tank, and the drain pipe 104 of the upper mold base 100 and the drain channel 115 of the lower mold base 110 are both connected to an external return water tank; When performing the cooling operation, close the first switching valve 105 of the drain pipe 104 and the second switching valves 116 of each drain channel 115, and at the same time open the first switching valve 105 of the liquid inlet pipe 103 and the second switching valves 116 of each liquid inlet channel 112, and then the cooling water can enter the inside of the upper mold base 100 through the liquid inlet pipe 103 and enter each punch 111 through each liquid inlet channel 112, so that the cooling water fills the inside of the upper mold base 100 and fills the inside of each punch 111. In this way, when performing the cooling and forming of the injection molding raw material, cooling can be carried out synchronously from both the inside and the outside. Compared with the traditional external cooling method, it has better cooling and forming efficiency and improves the production efficiency of the injection molding of the earphone shell.

[0019] After the cooling and forming, by closing the first switching valve 105 of the liquid inlet pipe 103 and the second switching valves 116 of each liquid inlet channel 112, and opening the first switching valve 105 of the drain pipe 104 and the second switching valves 116 of each drain channel 115, the cooling water in the upper mold base 100 and the cooling water in each punch 111 can be discharged.

[0020] As an improvement of this embodiment, as Figure 2 and Figure 3 shown, a base 120 is fixedly installed at the bottom of the lower mold base 110, several vertical positioning platforms 121 are machined on both sides of the upper mold base 100, several vertical positioning rods 122 are fixedly connected to the base 120, and each vertical positioning rod 122 respectively slides through each vertical positioning platform 121; The upper ends of each vertical positioning rod 122 are fixedly connected to a top platform 123 together.

[0021] The vertical positioning rods 122 provided on the base 120 are engaged with the vertical positioning platforms 121 machined on both sides of the upper die base 100, so as to be able to position the up-and-down movement of the upper die base 100 and improve the stability of the opening and closing of the upper die base 100. At the same time, the upper ends of the respective vertical positioning rods 122 are fixed by the top platform 123, so that the upper ends of the respective vertical positioning rods 122 are fixed and the stability of the respective vertical positioning rods 122 is maintained.

[0022] Embodiment 2 further designs the discharging mode of the earphone housing on the basis of Embodiment 1, such as Figures 4 to 8 As shown, a plurality of sliding cavities 200 are further formed at the bottom of the lower die base 110 and are respectively located below the liquid cavities 113. A plurality of discharging mechanisms corresponding to the respective punching dies 111 are arranged inside the lower die base 110. Each discharging mechanism includes a counterweight ejecting rod 201 and a triggering assembly; The counterweight ejecting rod 201 is vertically arranged and sequentially penetrates upward through the sliding cavity 200, the liquid cavity 113 and the punching die 111, and the upper end surface of the counterweight ejecting rod 201 is flush with the upper end surface of the punching die 111. A iron sheet 202 slidably connected to the side walls on both sides of the sliding cavity 200 is arranged at the lower end of the counterweight ejecting rod 201, and limiting strips 203 corresponding to both sides of the bottom of the iron sheet 202 are machined at the bottom of the sliding cavity 200; The triggering assembly is used to trigger the ejecting action of the counterweight ejecting rod 201; the triggering assembly includes two elastic connectors 210, a sliding plate 211, two connecting rods 212 and a magnet block 213. Installation grooves are formed on both sides of the top of the liquid cavity 113, and the two elastic connectors 210 are respectively installed in the installation grooves on both sides. The sliding plate 211 is slidably arranged inside the liquid cavity 113 and is slidably sealed with the liquid cavity 113, and the lower ends of the two elastic connectors 210 are fixedly connected to the sliding plate 211 together; The two connecting rods 212 are fixedly arranged at the bottom of the sliding plate 211 and slide downward through the sliding cavity 200, and the lower ends of the two connecting rods 212 are fixedly connected to the magnet block 213 together. A gap exists between the magnet block 213 and the side walls on both sides of the sliding cavity 200, and separation strips 214 are fixedly arranged on the side walls on both sides of the sliding cavity 200; Specifically, in the initial state where the liquid cavity 113 is not filled with liquid, the sliding plate 211 is located in the middle of the liquid cavity 113 through the two elastic connectors 210, and the magnet block 213 is located above the iron sheet 202; The height spacing between the magnet block 213 and the iron sheet 202 is not greater than the height spacing between the sliding plate 211 and the lower side of the liquid cavity 113.

[0023] In this embodiment, the elastic connector 210 is preferably a spring. At the same time, taking the state without liquid filling as shown in Figure 6 as an example, the relationship among the separation strip 214, the limiting strip 203 and the magnet block 213 is described as follows: The two sides of the iron sheet 202 are close to and slidably connected to the two sides of the sliding cavity 200; There are gaps between the two sides of the magnet block 213 and the two sides of the sliding cavity 200; The width of the separation strip 214 matches the gap between the magnet block 213 and the side wall of the sliding cavity 200; Before the cooling operation when there is no liquid filling, as Figure 5 and Figure 6 shown, the iron sheet 202 at the lower end of the counterweight ejector rod 201 naturally falls under the action of gravity until it abuts against the limiting strips 203 on both sides of the sliding cavity 200. At this time, the upper end face of the counterweight ejector rod 201 is flush with the upper end face of the punch 111. The sliding plate 211 is located in the middle side of the liquid cavity 113 through two elastic connectors 210. The magnet block 213 is located above the iron sheet 202 and is not magnetically attracted to the iron sheet 202. The separation strip 214 is located between the magnet block 213 and the iron sheet 202; When performing the cooling operation as in Embodiment 1, the cooling water enters through the liquid inlet channel 112. Since the second switching valve 116 of the liquid discharge channel 115 is closed, the cooling water will enter and fill the liquid inlet channel 112, the punch 111, the liquid cavity 113, the liquid filling channel 114, and the liquid discharge channel 115. And because the sliding plate 211 is located in the middle side of the liquid cavity 113 through two elastic connectors 210, when the cooling water is filled, as Figure 7 and Figure 8 shown, the water filled in the liquid cavity 113 will push the sliding plate 211 downward to stretch the elastic connectors 210, thereby pushing the magnet block 213 at the bottom of the two connecting rods 212 downward, and further enabling the magnet block 213 to magnetically adsorb and fix the iron sheet 202; After the cooling and forming, first perform mold opening, and then open the liquid discharge channel 115 for drainage. After mold opening, as the liquid discharge channel 115 is opened, the water in the punch 111 and the liquid cavity 113 will gradually drain. And as the water volume in the liquid cavity 113 decreases, the elastic connectors 210 will elastically rebound, so that the sliding plate 211 will pull the magnet block 213 and the iron sheet 202 upward through the connecting rod 212, squeezing out the water in the liquid cavity 113. At the same time, the counterweight ejector rod 201 of the iron sheet 202 can follow the upward movement of the magnet block 213 to loosen and eject the formed earphone shell from the outer wall of the punch 111, facilitating material taking; At the same time, during this process, the magnet block 213 adsorbs the iron sheet 202 and continues to move upward. The iron sheet 202 will abut against the separation strip 214, so that when the magnet block 213 returns upward, the iron sheet 202 will be separated from the magnet block 213. After the iron sheet 202 is separated, the counterweight ejector rod 201 can naturally fall to the initial state to complete the return under the action of gravity, and the magnet sheet 213 returns to the initial state to complete the return under the action of the elastic connector 210.

[0024] As a further optimization in this embodiment, asFigure 6 As shown, a first guide sleeve 215 that matches the counterweight ejector rod 201 is provided inside both the sliding cavity 200 and the punch 111.

[0025] The first guide sleeve 215 can guide and position the up-and-down movement of the counterweight ejector rod 201, improving stability.

[0026] As a further improvement to this embodiment, to prevent the earphone housing from being carried out and dropped by the opening action of the upper die holder when the upper die holder opens the mold, as Figures 4 to 8 shown, a number of spring rods 220 corresponding to each cavity 101 are further installed on the top platform 123; The movable ends of the spring rods 220 all extend downward and slide through to be flush with the inner end face of the cavity 101. A limit frame 221 is jointly provided at the movable ends of each group of spring rods 220. A second guide sleeve 222 that matches the spring rods 220 is provided between the top of the punch 111 and the inner wall of the top of the upper die holder 100; The height spacing between the limit frame 221 and the upper die holder 100 is equal to the height stroke of the cavity 101 moving completely away from the punch 111 upward.

[0027] During the cooling operation, as Figures 5 to 8 shown, at this time, the upper die holder 100 and the lower die holder 110 are closed. The movable ends of each spring rod 220 on the top platform 123 all extend downward and slide through to be flush with the inner end face of the cavity 101. The second guide sleeve 222 provided can guide and position the movable ends of the spring rods 220, ensuring stability; During the mold opening process, when the upper die holder 100 moves upward, the movable ends of each spring rod 220 will not follow the upper die holder 100 to move upward under the elastic action. Thus, the earphone housing is pressed by the movable ends of each spring rod 220 so that the earphone housing always covers the outside of the punch 111 and separately disengages from the cavity 101, preventing the earphone housing from following the cavity 101 to move upward relative to the punch 111 and fall off. At this time, the liquid cavity 113 is not drained, making the elastic connector 210 continuously in a stretched state; Until the upper die holder 100 moves to abut against the limit frame 221, at this time, the cavity 101 of the upper die holder 100 just disengages from the punch 111. Then, as the upper die holder 100 continues to move upward to open the mold, the upper die holder 100 will push the limit frame 221 to move upward, so that the movable ends of each spring rod 220 will be able to follow the upper die holder 100 to move upward. Furthermore, the movable ends of each spring rod 220 move upward to disengage from the earphone housing. At this time, the drainage channel 115 can be opened for drainage; Since the movable ends of the respective spring rods 220 move upwardly away from the earphone housing and the drainage channel 115 is opened for drainage, as described above, it can be seen that the elastic connecting member 210 will rebound, thereby pulling the slide plate 211 upwardly to squeeze out the water in the liquid chamber 113. Moreover, under the action of the rebound of the elastic connecting member 210, the weight ejection rod 201 will eject upwardly, causing the earphone housing to loosen and eject upwardly relative to the punch 111. While facilitating the taking of the material, when the upper die holder is opened, the earphone housing will not be carried out and dropped by the opening action of the upper die holder.

[0028] The above embodiments are only used to exemplarily illustrate the principles and effects of the present invention, rather than to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An earphone housing injection mold, comprising an upper mold base and a lower mold base, characterized in that: The upper die base is hollow inside and has a plurality of concave cavities processed at the bottom, and the upper surface of the lower die base is processed with a plurality of convex dies corresponding to the cavities respectively, and the interior of the convex dies is a hollow structure; A feed pipe is provided on the middle side of the top of each mold cavity, and each feed pipe extends upward and passes through the top of the upper mold base. The upper mold base is provided with a first cooling mechanism, and the first cooling mechanism includes a liquid inlet pipe and a liquid discharge pipe installed on both sides of the upper mold base, and the liquid inlet pipe and the liquid discharge pipe are both provided with a first switch valve; The lower die base is provided with a plurality of second cooling mechanisms respectively corresponding to the respective convex dies, and each of the second cooling mechanisms includes a liquid inlet channel, a liquid cavity, a liquid filling channel and a liquid discharge channel opened inside the lower die base, the liquid inlet channel is connected with the inside of the convex die, the liquid cavity is located below the convex die, the two ends of the liquid filling channel are respectively connected with the upper side of the liquid cavity and the bottom of the convex die, and the liquid discharge channel is connected with the upper side of the liquid cavity; The liquid inlet channel and the liquid discharge channel of each of the second cooling mechanisms are both provided with a second switch valve; The bottom of the lower die base is also provided with a plurality of sliding cavities respectively located below the liquid cavity, and the lower die base is provided with a plurality of discharge mechanisms respectively corresponding to the respective convex dies, and each of the discharge mechanisms includes a counterweight ejector rod and a trigger assembly; The counterweight ejector rod is vertically arranged and passes through the slide cavity, the liquid cavity and the punch upward in sequence, and the upper end surface of the counterweight ejector rod is flush with the upper end surface of the punch. The lower end of the counterweight ejector rod is provided with an iron sheet slidably connected to the side walls of the slide cavity, and the bottom of the slide cavity is processed with limit strips corresponding to the two sides of the bottom of the iron sheet; The trigger assembly is used to trigger the ejection action of the counterweight ejection rod.

2. The earphone housing injection mold according to claim 1, characterized in that: A base is fixedly mounted at the bottom of the lower die seat, a plurality of vertical positioning platforms are processed on both sides of the upper die seat, and a plurality of vertical positioning rods are fixedly connected to the base, and each of the vertical positioning rods slides through each of the vertical positioning platforms.

3. The earphone housing injection mold according to claim 2, characterized in that: The upper ends of the vertical positioning rods are commonly and fixedly connected with a top platform.

4. The earphone housing injection mold according to claim 1, characterized in that: The trigger assembly includes two elastic connectors, a slide plate, two connecting rods and a magnet block. The top of the liquid chamber is provided with mounting grooves on both sides. The two elastic connectors are respectively installed in the mounting grooves on both sides. The slide plate is slidably arranged inside the liquid chamber and is slidably sealed with the liquid chamber. The lower ends of the two elastic connectors are fixedly connected to the slide plate. The two connecting rods are fixedly arranged at the bottom of the slide plate and slide downward to penetrate into the slide cavity. The lower ends of the two connecting rods are fixedly connected to the magnet block. There is a gap between the magnet block and the side walls of the slide cavity. Separation strips are fixedly arranged on the side walls of the slide cavity.

5. The earphone housing injection mold according to claim 4, characterized in that: In the initial state where the liquid cavity is not filled with liquid, the slide plate is located in the middle side of the liquid cavity through the two elastic connecting members, and the magnet block is located above the iron sheet; The height distance between the magnet block and the iron sheet is not greater than the height distance between the slide plate and the lower side of the liquid chamber.

6. The earphone housing injection mold according to claim 5, characterized in that: The sliding cavity and the inside of the punch are both provided with a first guide sleeve matching the counterweight ejection rod.

7. The earphone housing injection mold according to claim 6, characterized in that: The top platform is also equipped with a plurality of groups of spring rods corresponding to each of the mold cavities; The movable ends of the spring rods extend downward and slide through until they are flush with the inner end surface of the mold cavity, and the movable ends of each group of spring rods are jointly provided with a limiting frame, and a second guide sleeve matching the spring rods is provided between the top of the punch and the inner wall of the top of the upper die seat; The height spacing between the limiting frame and the upper die seat is equal to the height travel of the die cavity upwardly completely separated from the punch.

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