Forming mold for earphone shell production

Abstract

The invention belongs to the technical field of earphone shell production, and particularly relates to a forming mold for earphone shell production, a mold group can integrally rotate, so that a plurality of molds can perform different production stages such as injection molding, cooling and material taking within the same time, the production period is further shortened, and meanwhile, the production efficiency is improved due to the automatic design of the molds. For example, an injection system controlled by an electric telescopic rod, a contraction spring and an arc-shaped block automatically control opening and closing of the front mold and the rear mold and the like, the manual operation time is greatly shortened, the use safety of the mold is improved, meanwhile, the production efficiency is improved, and the production cost is reduced. Each connecting rod group comprises four connecting rods which are arranged in pairs in the front-back direction and are symmetrically distributed up and down, so that the four connecting rods jointly form two groups of structures similar to double-fork-arm structures up and down, and the contact surfaces of the front mold and the rear mold can always keep parallel operation when the front mold and the rear mold are opened and closed front and back, so that the precision of the mold is improved; and the quality of products produced by the die is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of earphone shell production, and particularly relates to a molding die for producing an earphone shell. Background Art

[0002] Headphones have become an indispensable electronic product in people's daily life. As an important part of headphones, the quality and production efficiency of the headphone shell directly affect the overall performance and market competitiveness of the headphones.

[0003] At present, the production of headphone shells mainly relies on the injection mold molding process. This process includes five stages: mold closing, filling, pressure holding, cooling and demolding. Among them, the cooling stage is one of the key factors that determine the length of the production cycle. Traditional mold cooling methods usually rely on natural cooling or a simple water cooling system, which has low cooling efficiency. Since the headphone shell usually has a certain thickness, it takes a long time for the molten plastic to fully cool and solidify in the mold, which not only prolongs the production cycle, but also increases production costs. Summary of the invention

[0004] The purpose of the present invention is to provide a molding die for producing earphone shells, so as to solve the problems mentioned in the background technology.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows: A forming mold for producing an earphone shell, comprising a base, a mounting seat rotatably mounted on the upper side of the base, and a plurality of mold groups evenly mounted on the outer side of the mounting seat; The mold group includes a front mold and a rear mold, and a connecting rod group is installed between the front mold and the mounting seat and between the rear mold and the mounting seat. One end of the front and rear connecting rod groups at the same position are respectively hinged to the front and rear molds, and the other ends are hinged to the mounting seat. Each group of the connecting rod groups includes four parallel connecting rods that are arranged in groups of two and symmetrically distributed up and down. The four connecting rods in each group of the connecting rod groups are connected to a control block in common transmission in the middle. A contraction spring is connected between the control blocks at adjacent front and rear positions. A top wheel is rotatably installed at one end close to the control block, an arc block fixedly connected to the base is installed on the right side of the mounting seat, the arc block matches the top wheel and the upper and lower ends are processed into front-to-back symmetrical inclined surfaces, an injection hole is opened in the middle of the front mold, an electric telescopic rod is horizontally fixed on the upper side of the base, an injection nozzle is fixed on the rear side of the output end of the electric telescopic rod, a feed port is opened on the upper side of the injection nozzle, a limit assembly for controlling the position of the front mold and the rear mold is installed on the left side of the base, and a transmission assembly for controlling its rotation is installed on the rear side of the mounting seat.

[0006] The limiting assembly includes a C-shaped plate fixedly connected to the base, and the front mold and the rear mold are both rotatably installed with limiting wheels on the side away from the mounting seat. The C-shaped plate matches the limiting wheels and is located between the front and rear limiting wheels.

[0007] The inner sides of the front mold and the rear mold are both provided with cooling grooves, and the sides of the front mold and the rear mold are both provided with water inlet pipes and water outlet pipes matching the cooling grooves. Connecting pipes are fixed on the front and rear sides of the mounting seat, and the connecting pipes are rotatably connected to the base. Water outlet rotating joints are installed on the outer sides of the connecting pipes, and the output ends of the water outlet rotating joints are connected to the connecting pipe pipelines. Connecting holes communicating with the interior of the connecting pipes are installed on the outer sides of the connecting pipes, and the connecting holes of one of the connecting pipes are respectively connected to the water inlet pipe pipelines of the front mold and the rear mold, and the connecting holes of the other connecting pipe are respectively connected to the water outlet pipe pipelines of the front mold and the rear mold.

[0008] A top plate matching the front mold is installed at the rear side of the front mold, and tension springs are installed on the left and right sides of the top plate, and the other end of the tension spring is fixedly connected to the front mold.

[0009] A limiting head fixedly connected to the rear mold is installed in the middle of the tensioning spring.

[0010] A square notch connected to the interior of the rear mold is provided on the rear side of the rear mold, a top block matching the rear mold is slidably connected to the inner side of the square notch, a top rod transmission-connected to the top block is slidably connected to the rear side of the rear mold, a control wheel seat is installed on the rear side of the top rod, a control wheel is rotatably installed on the upper side of the control wheel seat, a return spring is sleeved on the outer side of the top rod, front and rear ends of the return spring are respectively fixedly connected to the control wheel seat and the rear mold, and a trapezoidal block fixedly connected to the base and matching the control wheel is installed on the right side of the mounting seat.

[0011] The transmission assembly includes a worm wheel, which is drivingly connected to the connecting tube on the rear side. A worm is installed on the side of the worm wheel, which is rotatably connected to the base and meshing with the worm wheel. A motor is installed on the upper side of the base, and the output end of the motor is drivingly connected to the worm.

[0012] The front side of the rear mold is fixed with limit groove rods which are symmetrically distributed up and down, and the rear side of the front mold is fixed with limit rods which match the limit groove rods.

[0013] The mold group can rotate as a whole, so that multiple molds can perform different production stages at the same time, such as injection, cooling and material removal, thereby further shortening the production cycle. At the same time, the automated design of the mold, such as the injection system controlled by the electric telescopic rod, the contraction spring and the arc block automatically controlling the opening and closing of the front mold and the rear mold, greatly reduces the time of manual operation, improves the safety of mold use, and at the same time improves production efficiency. Each group of connecting rods includes four connecting rods that are symmetrically distributed up and down, and the four connecting rods together form two groups of upper and lower double wishbone structures, so that The front mold and the rear mold can keep the contact surfaces parallel when opening and closing, thereby improving the precision of the mold and ensuring the quality of the product produced by the mold; the C-shaped plate and the limit wheel are used to limit the front and rear position of the mold when the mold rotates as a whole to prevent it from excessive movement or damage, thereby improving the operation stability and reliability of the mold. The front mold and the rear mold are provided with cooling grooves on the inside, which are connected to the external cooling system through the water inlet and outlet pipes. The design of the connecting pipe, the water outlet swivel joint and the connecting hole allows the mold to remain connected to the cooling system when rotating, ensuring that the mold can quickly and evenly cool the plastic material, thereby ensuring the quality of the earphones. The production quality of the shell is improved and the production cycle is further shortened. The cooperation between the top plate and the tension spring enables the top plate to eject the cooled earphone shell from the front mold when the front mold is separated from the rear mold, thereby preventing the cooled earphone shell from sticking to the front mold. The limit head can press the top plate when the front mold and the rear mold are closed, thereby ensuring that the front mold and the rear mold can fit tightly and preventing plastic material leakage; the trapezoidal block fixedly connected to the base can push the control wheel forward when the rear mold rotates to the trapezoidal block position, thereby controlling the top block to eject the processed earphone shell from the rear mold to achieve automatic demoulding, reducing It reduces the chance of workers directly contacting the mold and reduces the risk of work-related injuries caused by improper operation or mold failure, while further improving the production efficiency of the mold. The design of controlling the rotation of the entire mold through the cooperation of the worm gear enables the motor to control the rotation position of the mold more accurately, and has good load capacity, which improves the reliability and stability of the transmission. At the same time, it also makes the structure of the transmission component simple and reliable, which helps to reduce maintenance costs. The limit slot rod on the front side of the rear mold and the limit rod on the rear side of the front mold are used to provide additional positioning and stability when the mold is closed, thereby further ensuring the quality of products produced by the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further illustrated by means of the non-limiting examples given in the accompanying drawings.

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0017] Figure 3 It is a schematic structural diagram of the top of the present invention.

[0018] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0019] Figure 5 It is a structural schematic diagram of the present invention from another angle.

[0020] Figure 6 It is a schematic diagram of the structure of a single mold group in the present invention.

[0021] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at point C in the middle.

[0022] Figure 8 for Figure 6 Schematic diagram of the enlarged structure at D in the middle.

[0023] Base 1, mounting base 2, front mold 3, rear mold 4, connecting rod 5, control block 6, contraction spring 7, top wheel 8, arc block 9, inclined surface 10, injection hole 11, electric telescopic rod 12, injection nozzle 13, feed port 14, C-shaped plate 15, limit rotating wheel 16, cooling groove 17, water inlet pipe 18, water outlet pipe 19, connecting pipe 20, water outlet rotating joint 21, connecting hole 22, top plate 23, tensioning spring 24, limit head 25, top block 26, top rod 27, control wheel seat 28, control wheel 29, reset spring 30, trapezoidal block 31, worm gear 32, worm 33, motor 34, limit slot rod 35, limit rod 36. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] like Figure 1-8 As shown, a molding die for producing earphone shells comprises a base 1, a mounting seat 2 is rotatably mounted on the upper side of the base 1, and a plurality of mold groups are evenly mounted on the outer side of the mounting seat 2; The mold group includes a front mold 3 and a rear mold 4. A connecting rod group is installed between the front mold 3 and the mounting seat 2 and between the rear mold 4 and the mounting seat 2. One end of the front and rear connecting rod groups at the same position is respectively hinged to the front and rear molds 3 and the rear mold 4, and the other end is hinged to the mounting seat 2. Each connecting rod group includes four parallel connecting rods 5 that are arranged in groups of two and symmetrically distributed up and down. The four connecting rods 5 of each connecting rod group are connected to a control block 6 in the middle of the common transmission. The control blocks 6 at adjacent positions are connected with a contraction spring 7. The front and rear control blocks 6 are close to each other. A top wheel 8 is rotatably installed at one end of the mounting seat 2, an arc block 9 fixedly connected to the base 1 is installed on the right side of the mounting seat 2, the arc block 9 matches the top wheel 8 and the upper and lower ends thereof are processed into front-to-back symmetrical inclined surfaces 10, an injection hole 11 is opened in the middle of the front mold 3, an electric telescopic rod 12 is horizontally fixed on the upper side of the base 1, an injection nozzle 13 is fixed on the rear side of the output end of the electric telescopic rod 12, and a feed port 14 is opened on the upper side of the injection nozzle 13, a limit assembly for controlling the position of the front mold 3 and the rear mold 4 is installed on the left side of the base 1, and a transmission assembly for controlling its rotation is installed on the rear side of the mounting seat 2.

[0026] In the present invention, the mold group consists of a front mold 3 and a rear mold 4, which are connected to the mounting base 2 through a connecting rod group, and the control blocks 6 are connected through a contraction spring 7 to ensure that the mold can fit tightly when closed. The transmission assembly causes the mounting base 2 and the surrounding area to rotate counterclockwise as a whole. An injection hole 11 is provided in the middle of the front mold 3 for injecting plastic material. The feed port 14 on the upper side of the injection nozzle 13 is connected to the discharge port of the injection molding equipment. Through the combination of the electric telescopic rod 12 and the injection nozzle 13, when the front mold 3 and the rear mold 4 are located at the uppermost specified position, the electric telescopic rod 12 extends to control the injection nozzle 13 to align with the injection hole 11 to inject the mold, ensuring that the plastic material can be evenly filled into the mold.

[0027] The mold group can rotate as a whole, so that multiple molds can perform different production stages at the same time, such as injection molding, cooling and material removal, thereby further shortening the production cycle. At the same time, the automated design of the mold, such as the injection system controlled by the electric telescopic rod 12, the contraction spring 7 and the arc block 9 automatically controlling the opening and closing of the front mold 3 and the rear mold 4, etc., greatly reduces the time of manual operation, improves the safety of mold use, and at the same time improves production efficiency. Each group of connecting rod groups includes four connecting rods 5 that are arranged in groups of two in front and back and symmetrically distributed up and down, so that the four connecting rods 5 together form two groups of double-wishbone structures in the upper and lower parts, so that the front mold 3 and the rear mold 4 can always keep the contact surfaces parallel when opening and closing in the front and back, thereby improving the accuracy of the mold and ensuring the quality of the products produced by the mold. The limiting assembly includes a C-shaped plate 15 fixedly connected to the base 1 , and the front mold 3 and the rear mold 4 are both rotatably installed with limiting wheels 16 on the side away from the mounting seat 2 . The C-shaped plate 15 matches the limiting wheels 16 and is located between the front and rear limiting wheels 16 .

[0028] The C-shaped plate 15 and the limiting rotating wheel 16 are used to limit the front and rear positions of the mold when the mold rotates as a whole, preventing it from excessive movement or damage, thereby improving the operating stability and reliability of the mold.

[0029] The inner sides of the front mold 3 and the rear mold 4 are provided with cooling grooves 17, and the sides of the front mold 3 and the rear mold 4 are provided with water inlet pipes 18 and water outlet pipes 19 matching the cooling grooves 17. Connecting pipes 20 are fixed on the front and rear sides of the mounting seat 2, and the connecting pipes 20 are rotatably connected to the base 1. Water outlet rotary joints 21 are installed on the outer sides of the connecting pipes 20, and the output ends of the water outlet rotary joints 21 are connected to the connecting pipes 20 pipelines. Connecting holes 22 connected to the interior of the connecting pipes 20 are installed on the outer sides of the connecting pipes 20, and the connecting holes 22 of one connecting pipe 20 are respectively connected to the water inlet pipes 18 of the front mold 3 and the rear mold 4, and the connecting holes 22 of the other connecting pipe 20 are respectively connected to the water outlet pipes 19 of the front mold 3 and the rear mold 4.

[0030] The water outlet rotary joint 21 is a special pipe connection device, which allows the connected pipes to rotate relative to each other while still maintaining normal fluid transportation.

[0031] A cooling groove 17 is provided on the inner side of the front mold 3 and the rear mold 4, which is connected to the external cooling system through a water inlet pipe 18 and a water outlet pipe 19. The design of the connecting pipe 20, the water outlet rotary joint 21 and the connecting hole 22 allows the mold to remain connected to the cooling system while rotating, ensuring that the mold can cool the plastic material quickly and evenly, thereby ensuring the production quality of the earphone shell and further shortening the production cycle.

[0032] A top plate 23 matching with the front mold 3 is installed at the rear side thereof, and tension springs 24 are installed on the left and right sides of the top plate 23 , and the other end of the tension spring 24 is fixedly connected to the front mold 3 .

[0033] A limiting head 25 fixedly connected to the rear mold 4 is installed in the middle of the tensioning spring 24 .

[0034] The cooperation between the top plate 23 and the tensioning spring 24 enables the top plate 23 to eject the cooled earphone shell from the front mold 3 when the front mold 3 is separated from the rear mold 4, thereby preventing the cooled earphone shell from sticking to the front mold 3. The limiting head 25 can press the top plate 23 when the front mold 3 and the rear mold 4 are closed, thereby ensuring that the front mold 3 and the rear mold 4 can fit tightly and prevent leakage of plastic material.

[0035] A square notch connected to the interior of the rear mold 4 is provided on the rear side of the rear mold 4, and a top block 26 matching the rear mold 4 is slidably connected to the inner side of the square notch. A top rod 27 transmission-connected to the top block 26 is slidably connected to the rear side of the rear mold 4. A control wheel seat 28 is installed on the rear side of the top rod 27, and a control wheel 29 is rotatably installed on the upper side of the control wheel seat 28. A return spring 30 is sleeved on the outer side of the top rod 27, and the front and rear ends of the return spring 30 are fixedly connected to the control wheel seat 28 and the rear mold 4 respectively. A trapezoidal block 31 fixedly connected to the base 1 and matching the control wheel 29 is installed on the right side of the mounting seat 2.

[0036] The trapezoidal block 31 fixedly connected to the base 1 can push the control wheel 29 forward when the rear mold 4 rotates to the position of the trapezoidal block 31, thereby controlling the ejection block 26 to eject the processed earphone shell from the rear mold 4 to achieve automatic demolding, reducing the chance of workers directly contacting the mold, reducing the risk of work-related injuries caused by improper operation or mold failure, and further improving the production efficiency of the mold.

[0037] The transmission assembly includes a worm wheel 32, which is transmission-connected to the connecting tube 20 at the rear side. A worm 33 is mounted on the side of the worm wheel 32 and is rotationally connected to the base 1 and meshes with the worm wheel 32. A motor 34 is mounted on the upper side of the base 1, and the output end of the motor 34 is transmission-connected to the worm 33.

[0038] The design of controlling the rotation of the entire mold through the cooperation of the worm wheel 32 and the worm 33 enables the motor 34 to more accurately control the rotation position of the mold and has good load capacity, thereby improving the reliability and stability of the transmission. At the same time, it also makes the structure of the transmission component simple and reliable, which helps to reduce maintenance costs.

[0039] A limiting groove rod 35 symmetrically distributed up and down is fixed to the front side of the rear mold 4 , and a limiting rod 36 matching the limiting groove rod 35 is fixed to the rear side of the front mold 3 .

[0040] The limiting groove rod 35 on the front side of the rear mold 4 and the limiting rod 36 on the rear side of the front mold 3 are used to provide additional positioning and stability when the mold is closed, thereby further ensuring the quality of the product produced by the mold.

[0041] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating 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. A molding die for producing an earphone shell, comprising a base, characterized in that: A mounting seat is rotatably mounted on the upper side of the base, and a plurality of mold groups are evenly mounted on the outer side of the mounting seat; The mold group includes a front mold and a rear mold, and a connecting rod group is installed between the front mold and the mounting seat and between the rear mold and the mounting seat. One end of the front and rear connecting rod groups at the same position are respectively hinged to the front and rear molds, and the other ends are hinged to the mounting seat. Each group of the connecting rod groups includes four parallel connecting rods that are arranged in groups of two and symmetrically distributed up and down. The four connecting rods in each group of the connecting rod groups are connected to a control block in common transmission in the middle. A contraction spring is connected between the control blocks at adjacent front and rear positions. A top wheel is rotatably installed at one end close to the control block, an arc block fixedly connected to the base is installed on the right side of the mounting seat, the arc block matches the top wheel and the upper and lower ends are processed into front-to-back symmetrical inclined surfaces, an injection hole is opened in the middle of the front mold, an electric telescopic rod is horizontally fixed on the upper side of the base, an injection nozzle is fixed on the rear side of the output end of the electric telescopic rod, a feed port is opened on the upper side of the injection nozzle, a limit assembly for controlling the position of the front mold and the rear mold is installed on the left side of the base, and a transmission assembly for controlling its rotation is installed on the rear side of the mounting seat.

2. The molding die for producing an earphone shell according to claim 1, characterized in that: The limiting assembly includes a C-shaped plate fixedly connected to the base, and the front mold and the rear mold are both rotatably installed with limiting wheels on the side away from the mounting seat. The C-shaped plate matches the limiting wheels and is located between the front and rear limiting wheels.

3. The molding die for producing an earphone shell according to claim 2, characterized in that: The inner sides of the front mold and the rear mold are both provided with cooling grooves, and the sides of the front mold and the rear mold are both provided with water inlet pipes and water outlet pipes matching the cooling grooves. Connecting pipes are fixed on the front and rear sides of the mounting seat, and the connecting pipes are rotatably connected to the base. Water outlet rotating joints are installed on the outer sides of the connecting pipes, and the output ends of the water outlet rotating joints are connected to the connecting pipe pipelines. Connecting holes communicating with the interior of the connecting pipes are installed on the outer sides of the connecting pipes, and the connecting holes of one of the connecting pipes are respectively connected to the water inlet pipe pipelines of the front mold and the rear mold, and the connecting holes of the other connecting pipe are respectively connected to the water outlet pipe pipelines of the front mold and the rear mold.

4. The molding die for producing an earphone shell according to claim 3, characterized in that: A top plate matching the front mold is installed at the rear side of the front mold, and tension springs are installed on the left and right sides of the top plate, and the other end of the tension spring is fixedly connected to the front mold.

5. The molding die for producing an earphone shell according to claim 4, characterized in that: A limiting head fixedly connected to the rear mold is installed in the middle of the tensioning spring.

6. The molding die for producing an earphone shell according to claim 5, characterized in that: A square notch connected to the interior of the rear mold is provided on the rear side of the rear mold, a top block matching the rear mold is slidably connected to the inner side of the square notch, a top rod transmission-connected to the top block is slidably connected to the rear side of the rear mold, a control wheel seat is installed on the rear side of the top rod, a control wheel is rotatably installed on the upper side of the control wheel seat, a return spring is sleeved on the outer side of the top rod, front and rear ends of the return spring are respectively fixedly connected to the control wheel seat and the rear mold, and a trapezoidal block fixedly connected to the base and matching the control wheel is installed on the right side of the mounting seat.

7. The molding die for producing an earphone shell according to claim 6, characterized in that: The transmission assembly includes a worm wheel, which is drivingly connected to the connecting tube on the rear side. A worm is installed on the side of the worm wheel, which is rotatably connected to the base and meshing with the worm wheel. A motor is installed on the upper side of the base, and the output end of the motor is drivingly connected to the worm.

8. The molding die for producing an earphone shell according to claim 7, characterized in that: The front side of the rear mold is fixed with limit groove rods which are symmetrically distributed up and down, and the rear side of the front mold is fixed with limit rods which match the limit groove rods.

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