Low-temperature injection molding runner structure of earphone shell

Abstract

The utility model relates to earphone shell injection moulding technical field especially relates to a kind of low-temperature injection flow channel structure of earphone shell, including lower mould assembly, upper mould assembly, injection flow channel assembly, further including mould core component;The upper end of lower mould assembly is provided with upper mould assembly;Lower mould assembly and the inside of upper mould assembly are provided with mould core component;The lower end of lower mould assembly is provided with injection flow channel assembly.The utility model is by the flow channel pipe of injection flow channel assembly, injection channel is injected into lower mould and upper mould assembly between and carries out injection filling with low-temperature injection material, since injection channel is set between lower mould and upper mould assembly, so that the temperature sensor and hydraulic sensor outside injection channel carry out temperature, hydraulic monitoring to the injection material in injection cavity inside, to accurately judge the filling state of material in injection cavity, to control the switch size of solenoid valve with this information, and then dynamically accurately adjust the injection regulation precision of the material of flow channel pipe.

Description

Technical Field

[0001] This utility model relates to the field of headphone shell injection molding technology, and in particular to a low-temperature injection molding flow channel structure for headphone shells. Background Technology

[0002] In the headphone manufacturing industry, low-temperature injection molding is often used in the production of headphone shells. The existing low-temperature injection molding runner structure for headphone shells mainly consists of a main runner, branch runners, a gate, and a cold slug well. After the molten plastic is injected from the injection molding machine nozzle, it first passes through the main runner, then enters the branch runner, and then flows into the mold cavity through the gate to achieve injection molding. In this process, the runner system plays a key role in the flow and temperature control of the plastic.

[0003] However, the current low-temperature injection molding runner structure for headphone shells has significant defects. Because the runner cannot dynamically adjust according to the real-time temperature and hydraulic pressure changes of the material within the injection cavity, frequent problems occur during the material molding process. When the material flows in the runner, because the mold temperature is lower than the material temperature, the material near the mold wall cools down first, while the material temperature in the center of the runner remains higher. Furthermore, the runner system struggles to adjust for this temperature difference in real time, leading to asynchronous material cooling. Moreover, the existing injection runner cannot adjust in time according to these hydraulic pressure changes, resulting in uneven material filling in the cavity. This not only causes inconsistent shrinkage in different parts of the headphone shell, creating internal stress concentration and affecting dimensional accuracy, but also reduces the product's structural stability, making it prone to cracking during subsequent use. Utility Model Content

[0004] In order to overcome the problems of asynchronous material cooling and poor structural stability caused by the inability of the existing low-temperature injection molding flow channel structure of the headphone shell to dynamically adjust according to the real-time temperature and hydraulic pressure changes of the material in the injection cavity, this utility model provides a low-temperature injection molding flow channel structure for the headphone shell.

[0005] The technical solution is as follows: A low-temperature injection molding runner structure for an earphone shell includes a lower mold assembly, an upper mold assembly, an injection molding runner assembly, and a mold core assembly; the upper mold assembly is disposed at the upper end of the lower mold assembly; the mold core assembly is disposed inside the lower mold assembly and the upper mold assembly; the injection molding runner assembly is disposed at the lower end of the lower mold assembly; the lower mold assembly includes a lower mold and an injection molding runner hole; the mold core assembly includes a mold core fixing component, a mold core, and a cooling pipe; the injection molding runner assembly includes a runner pipe, a solenoid valve, a hydraulic sensor, an injection channel, and a temperature sensor; the lower mold assembly and the upper mold assembly are connected by a pin; the runner pipe is disposed at the lower end of the lower mold.

[0006] Furthermore, an injection channel is provided at the upper end of the flow channel; a solenoid valve is installed inside the injection channel, and the output end of the flow channel is connected to the input end of the injection channel.

[0007] Furthermore, an injection channel is provided at the upper end of the flow channel; a solenoid valve is installed inside the injection channel, and the output end of the flow channel is connected to the input end of the injection channel.

[0008] Furthermore, the solenoid valve is electrically connected to an external injection molding monitoring device. This injection molding monitoring device is a well-known device used in the prior art for monitoring the production process of injection molding machines. It can collect parameters such as injection pressure and temperature in real time and transmit the signals to the controller of the solenoid valve through the electrical control connection line. The solenoid valve adjusts its opening degree according to the received signal, thereby realizing closed-loop control of the injection molding process parameters.

[0009] Furthermore, a temperature sensor is installed on the outside of the injection channel; a hydraulic sensor is installed at the upper end of the injection channel, and the temperature sensor and the hydraulic sensor are connected to the external injection monitoring equipment for information transmission.

[0010] Furthermore, a mold core is provided at the upper end of the lower mold, and the mold core is connected to the lower mold pin; a mold core fixing component is provided on one side of the mold core, and the mold core fixing component is integrally formed with the mold core.

[0011] Furthermore, a cooling pipe is provided at one end of the mold core fixing component, and the cooling pipe is connected to the mold core fixing component and the mold cooling line inside the mold core.

[0012] The beneficial effects are as follows: The low-temperature injection molding material of this utility model is injected into the molding space between the lower mold and the upper mold assembly through the flow channel and injection channel of the injection flow channel assembly. Since the injection channel is set between the lower mold and the upper mold assembly, the temperature sensor and hydraulic sensor installed outside the injection channel can directly monitor the injection plastic in the injection cavity in real time. The temperature sensor collects the material temperature data, and the hydraulic sensor obtains the pressure change information in the cavity. The combination of the two data can accurately determine the filling degree, flow state and whether there are filling defects in the material in the injection cavity. Based on these monitoring data, the system controls the opening and closing degree of the solenoid valve, thereby dynamically adjusting the material conveying volume of the flow channel, realizing precise control of material injection, and improving the stability and consistency of the injection molding process.

[0013] By setting up the mold core assembly, the mold core assembly is clamped between the lower mold assembly and the upper mold assembly. Since the mold core fixing part and the mold core are integrally formed and connected to the lower mold by the pin, and the mold core fixing part and the internal cooling channel of the mold core are connected by the cooling pipe, the cooling pipe of the mold core is connected in series, which effectively improves the cooling efficiency of the mold and improves the overall convenience of replacing the mold core assembly. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall bottom-view three-dimensional structure of this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the combined lower mold assembly, mold core assembly, and injection runner assembly of this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the combined lower mold assembly and injection runner assembly of this utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of the injection molding runner assembly of this utility model.

[0019] In the attached diagram, the following are the reference numerals: 1. Lower mold assembly; 2. Upper mold assembly; 3. Mold core assembly; 4. Injection runner assembly; 101. Lower mold; 102. Injection runner hole; 301. Mold core fixing component; 302. Mold core; 303. Cooling pipe; 401. Runner pipe; 402. Solenoid valve; 403. Hydraulic sensor; 404. Injection channel; 405. Temperature sensor. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] Example 1

[0022] like Figures 1-5 As shown, a low-temperature injection molding runner structure for an earphone shell includes a lower mold assembly 1, an upper mold assembly 2, an injection runner assembly 4, and a mold core assembly 3. The upper mold assembly 2 is disposed at the upper end of the lower mold assembly 1. The mold core assembly 3 is disposed inside the lower mold assembly 1 and the upper mold assembly 2. The injection runner assembly 4 is disposed at the lower end of the lower mold assembly 1. The lower mold assembly 1 includes a lower mold 101 and an injection runner hole 102. The mold core assembly 3 includes a mold core fixing member 301, a mold core 302, and a cooling pipe 303. The injection runner assembly 4 includes a runner pipe 401, a solenoid valve 402, a hydraulic sensor 403, an injection channel 404, and a temperature sensor 405. The lower mold assembly 1 and the upper mold assembly 2 are connected by a pin. The runner pipe 401 is disposed at the lower end of the lower mold 101.

[0023] The upper end of the flow channel 401 is provided with an injection channel 404; a solenoid valve 402 is provided inside the injection channel 404, and the output end of the flow channel 401 is connected to the input end of the injection channel 404.

[0024] The upper end of the flow channel 401 is provided with an injection channel 404; a solenoid valve 402 is provided inside the injection channel 404, and the output end of the flow channel 401 is connected to the input end of the injection channel 404.

[0025] The solenoid valve 402 is electrically connected to an external injection molding monitoring device. The injection molding monitoring device is a well-known device used in the prior art for monitoring the production process of injection molding machines. It can collect parameters such as injection pressure and temperature in real time and transmit the signals to the controller of the solenoid valve 402 through the electrical control connection line. The solenoid valve 402 adjusts its opening degree according to the received signal, thereby realizing closed-loop control of the injection molding process parameters.

[0026] A temperature sensor 405 is installed on the outside of the injection channel 404; a hydraulic sensor 403 is installed at the upper end of the injection channel 404, and the temperature sensor 405 and the hydraulic sensor 403 are connected to the external injection monitoring equipment for information transmission.

[0027] Low-temperature injection molding material is injected into the molding space between the lower mold 101 and the upper mold assembly 2 through the flow channel 401 and injection channel 404 of the injection flow channel assembly 4. Since the injection channel 404 is located between the lower mold 101 and the upper mold assembly 2, the temperature sensor 405 and the hydraulic sensor 403 installed outside the injection channel 404 can directly monitor the injection plastic in the injection cavity in real time. The temperature sensor 405 collects material temperature data, and the hydraulic sensor 403 obtains information on pressure changes in the cavity. The combination of the two data can accurately determine the filling degree, flow state, and whether there are filling defects in the injection cavity. Based on these monitoring data, the system controls the opening and closing degree of the solenoid valve 402, thereby dynamically adjusting the material conveying amount of the flow channel 401, realizing precise control of material injection, and improving the stability and consistency of the injection molding process.

[0028] Example 2

[0029] Based on Example 1, such as Figures 1-5 As shown, the upper end of the lower mold 101 is provided with a mold core 302, and the mold core 302 is connected to the lower mold 101 by a pin; a mold core fixing member 301 is provided on one side of the mold core 302, and the mold core fixing member 301 and the mold core 302 are integrally formed.

[0030] A cooling pipe 303 is provided at one end of the mold core fixing component 301, and the cooling pipe 303 is connected to the mold cooling line inside the mold core fixing component 301 and the mold core 302.

[0031] With the mold core assembly 3 in place, the mold core assembly 3 is clamped between the lower mold assembly 1 and the upper mold assembly 2. Since the mold core fixing part 301 and the mold core 302 are integrally formed and connected to the lower mold 101 by a pin, and the internal cooling channels of the mold core fixing part 301 and the mold core 302 are connected by the cooling pipe 303, the cooling pipes of the mold core are connected in series, which effectively improves the cooling efficiency of the mold and improves the overall replacement convenience of the mold core assembly 3.

Claims

1. A low-temperature injection molding runner structure for an earphone shell, comprising a lower mold assembly (1), an upper mold assembly (2), and an injection molding runner assembly (4), characterized in that: It also includes a mold core assembly (3); an upper mold assembly (2) is provided at the upper end of the lower mold assembly (1); a mold core assembly (3) is provided inside the lower mold assembly (1) and the upper mold assembly (2); an injection runner assembly (4) is provided at the lower end of the lower mold assembly (1); the lower mold assembly (1) includes a lower mold (101) and an injection runner hole (102); the mold core assembly (3) includes a mold core fixing part (301), a mold core (302), and a cooling pipe (303); the injection runner assembly (4) includes a runner pipe (401), a solenoid valve (402), a hydraulic sensor (403), an injection channel (404), and a temperature sensor (405); the lower mold assembly (1) and the upper mold assembly (2) are connected by a pin; the lower mold (101) is provided with a runner pipe (401) at the lower end.

2. The low-temperature injection molding flow channel structure for an earphone shell according to claim 1, characterized in that: The upper end of the lower mold (101) is provided with an injection runner hole (102), and the injection runner hole (102) is integrally formed with the lower mold (101); a runner tube (401) is fixedly provided inside the injection runner hole (102).

3. The low-temperature injection molding flow channel structure for an earphone shell according to claim 2, characterized in that: The upper end of the flow channel (401) is provided with an injection channel (404); the injection channel (404) is provided with a solenoid valve (402), and the output end of the flow channel (401) is connected to the input end of the injection channel (404).

4. The low-temperature injection molding flow channel structure for an earphone shell according to claim 3, characterized in that: The solenoid valve (402) is electrically connected to an external injection molding monitoring device. The injection molding monitoring device is a well-known device used in the prior art for monitoring the production process of injection molding machines. It has the ability to collect injection pressure and temperature parameters in real time and transmit the signals to the controller of the solenoid valve (402) through the electrical control connection line. The solenoid valve (402) adjusts the opening degree according to the received signal, thereby realizing closed-loop control of injection molding process parameters.

5. The low-temperature injection molding flow channel structure for an earphone shell according to claim 3, characterized in that: A temperature sensor (405) is installed on the outside of the injection channel (404); a hydraulic sensor (403) is installed at the upper end of the injection channel (404), and the temperature sensor (405) and the hydraulic sensor (403) are connected to the external injection monitoring equipment for information transmission.

6. The low-temperature injection molding flow channel structure for an earphone shell according to claim 1, characterized in that: The upper end of the lower mold (101) is provided with a mold core (302), and the mold core (302) is connected to the lower mold (101) by a pin; a mold core fixing part (301) is provided on one side of the mold core (302), and the mold core fixing part (301) and the mold core (302) are integrally formed.

7. The low-temperature injection molding flow channel structure for an earphone shell according to claim 6, characterized in that: A cooling pipe (303) is provided at one end of the mold core fixing part (301), and the cooling pipe (303) is connected to the mold cooling line inside the mold core fixing part (301) and the mold core (302).

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