Nozzle for hot runner

Abstract

The utility model relates to the technical field of plastic forming molds, in particular to a nozzle for a hot runner, which comprises a main body, a nozzle component is arranged at the top of the main body, and a sealing component is arranged at the top of the nozzle component; according to the utility model, a combined sealing structure of the elastic sealing ring and the sealing gasket is arranged between the nozzle bin and the connecting pipe, so that materials can be prevented from leaking, and the double-sealing structure can effectively prevent molten plastic from leaking from interfaces between the nozzle and the runner plate as well as between the nozzle and the mold; the temperature change in the nozzle bin can be monitored in real time through the temperature sensor, the accuracy of temperature control is ensured through high-precision monitoring, the power of the electric heater is adjusted through the external power source, the temperature change can be rapidly responded, the heating power can be adjusted in time, and it is ensured that the temperature in the nozzle bin is always kept within the set range; and the fluctuation of the temperature in the nozzle bin can be effectively reduced through precise temperature control, and it is ensured that the plastic always keeps good fluidity in the injection process.

Description

Technical Field

[0001] This utility model relates to the field of plastic molding technology, and in particular to a nozzle for hot runners. Background Technology

[0002] Hot runner technology is widely used in plastic injection molding to improve production efficiency and product quality. It has applications across multiple industries. In the automotive industry, it's used to produce automotive parts such as headlight covers and dashboards. Hot runner systems optimize the injection molding process, reduce part weight without compromising performance. In the home appliance industry, it's used to produce appliance casings and internal structural components, improving production efficiency and product quality. In the medical industry, it's used to produce high-precision medical devices such as syringes and tubing, ensuring product hygiene and safety while maintaining production efficiency. In the daily chemical packaging industry, it's used to produce plastic bottles, cans, and hoses, improving production efficiency and reducing material waste. Due to its advantages such as improved injection molding efficiency, reduced material waste, and shorter molding cycles, hot runner technology is gradually becoming a popular development direction in the injection molding industry.

[0003] Traditional nozzles often have poor sealing, which can cause molten plastic to leak from the interface between the nozzle and the runner plate / mold, leading to material waste, equipment damage, and even affecting the safety of the production environment. Poor sealing can also cause pressure fluctuations inside the nozzle, affecting the flow and filling effect of the plastic, resulting in defects in the molded product, such as short shots, bubbles, and shrinkage. Poor sealing can also lead to heat loss, causing unstable internal temperature of the nozzle, affecting the fluidity of the plastic, prolonging the molding cycle, and causing temperature differences in different areas inside the nozzle, which can lead to uneven plastic flow, affecting the quality of the molded product. Localized excessively high temperatures may cause plastic degradation, while localized excessively low temperatures may cause plastic solidification. Therefore, a hot runner nozzle is needed to improve the above problems. Summary of the Invention

[0004] To address the problems mentioned above, such as poor sealing in traditional nozzles leading to leakage of molten plastic at the interface between the nozzle and the runner plate / mold, resulting in material waste, equipment damage, and even affecting the safety of the production environment, poor sealing can cause internal pressure fluctuations in the nozzle, affecting the flow and filling effect of the plastic and leading to defects in the molded product, such as short shots, bubbles, and shrinkage. Poor sealing can also cause heat loss, resulting in unstable internal temperature of the nozzle, affecting the fluidity of the plastic, prolonging the molding cycle, and causing uneven plastic flow in different areas of the nozzle, affecting the quality of the molded product. Localized excessively high temperatures may lead to plastic degradation, while localized excessively low temperatures may lead to plastic solidification. The purpose of this invention is to provide a hot runner nozzle to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A hot runner nozzle includes a body, a nozzle assembly disposed on the top of the body, and a sealing assembly disposed on the top of the nozzle assembly;

[0007] The nozzle assembly includes a connecting plate, a nozzle chamber is fixedly connected to the top of the connecting plate, a temperature sensor is installed on the side of the nozzle chamber, and an electric heater is installed inside the nozzle chamber.

[0008] The sealing assembly includes a connecting pipe, an elastic sealing ring is provided on the side of the connecting pipe, and a sealing gasket is provided on the elastic sealing ring.

[0009] As a preferred embodiment of this utility model, the nozzle chamber is provided with a color-changing channel inside, and a quick connector is fixedly connected to the top of the nozzle chamber, the quick connector being in communication with the color-changing channel.

[0010] As a preferred embodiment of this utility model, a nozzle core is installed inside the nozzle chamber, and the color-changing channel is connected to the flow channel of the nozzle core.

[0011] As a preferred embodiment of this utility model, the electric heater is connected to an external power source, and the temperature inside the nozzle chamber is monitored in real time by a temperature sensor.

[0012] As a preferred embodiment of this utility model, both the elastic sealing ring and the sealing gasket are made of rubber.

[0013] As a preferred embodiment of this utility model, a retaining ring is fixedly connected to the top of the connecting pipe, and a nozzle head is fixedly connected to the top of the retaining ring.

[0014] As a preferred embodiment of this utility model, the main body includes a nozzle seat, and the nozzle seat has an internal thread.

[0015] As a preferred embodiment of this utility model, the internal thread of the built-in thread is connected to a threaded rod, and a connecting seat is fixedly connected to the top of the threaded rod.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. In this utility model, by using a combination of elastic sealing ring and sealing gasket between the nozzle chamber and the connecting pipe, it is possible to ensure that the material will not leak. This double sealing structure can effectively prevent molten plastic from leaking from the interface between the nozzle and the flow channel plate and the mold. The elastic sealing ring can automatically adjust the pressure of the sealing contact surface when the internal pressure of the nozzle changes, ensuring that a good sealing effect can be maintained under different working conditions. The sealing gasket usually has high mechanical strength and stability, and can maintain its shape and performance under high temperature and high pressure environments, further enhancing the reliability of the seal.

[0018] 2. In this utility model, the temperature sensor can monitor the temperature change inside the nozzle chamber in real time. This high-precision monitoring ensures the accuracy of temperature control. By adjusting the power of the electric heater through an external power source, it can quickly respond to temperature changes and adjust the heating power in a timely manner to ensure that the temperature inside the nozzle chamber is always kept within the set range. Precise temperature control can effectively reduce the temperature fluctuation inside the nozzle chamber and ensure that the plastic maintains good fluidity during the injection process, thereby improving the quality and consistency of the molded product. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the threaded disassembly assembly structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the nozzle assembly structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the sealing component structure of this utility model.

[0023] In the diagram: 1-Main body; 101-Nozzle seat; 102-Internal thread; 103-Connecting seat; 104-Threaded rod; 2-Nozzle assembly; 201-Connecting disc; 202-Nozzle chamber; 203-Temperature sensor; 204-Quick connector; 3-Sealing assembly; 301-Connecting pipe; 302-Elastic sealing ring; 303-Sealing gasket; 304-Retaining ring; 305-Nozzle head. Detailed Implementation

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1 to 4 As shown, a hot runner nozzle includes a body 1, a nozzle assembly 2 is disposed on the top of the body 1, and a sealing assembly 3 is disposed on the top of the nozzle assembly 2.

[0026] like Figure 1 , Figure 3 and Figure 4As shown, the nozzle assembly 2 includes a connecting plate 201, to which a nozzle chamber 202 is fixedly connected. A temperature sensor 203 is mounted on the side of the nozzle chamber 202, and an electric heater is installed inside the nozzle chamber 202. The sealing assembly 3 includes a connecting pipe 301, to which an elastic sealing ring 302 is provided on the side. The elastic sealing ring 302 is provided with a sealing gasket 303. By using the combined sealing structure of the elastic sealing ring 302 and the sealing gasket 303 between the nozzle chamber 202 and the connecting pipe 301, material leakage can be ensured. This double sealing structure can effectively prevent molten plastic from leaking from the interface between the nozzle and the runner plate and the mold. The elastic sealing ring 302 can automatically adjust the pressure of the sealing contact surface when the internal pressure of the nozzle changes, ensuring a good sealing effect under different working conditions. The sealing gasket 303 usually has high mechanical strength and stability, and can maintain its shape and performance under high temperature and high pressure environments, further enhancing the reliability of the seal.

[0027] The nozzle chamber 202 has a color-changing channel inside. A quick connector 204 is fixedly connected to the top of the nozzle chamber 202, which communicates with the color-changing channel. A nozzle core is installed inside the nozzle chamber 202, and the color-changing channel is connected to the flow channel of the nozzle core. An electric heater is connected to an external power source, and a temperature sensor 203 monitors the internal temperature of the nozzle chamber 202 in real time. The elastic sealing ring 302 and the sealing gasket 303 are both made of rubber. A retaining ring 304 is fixedly connected to the top of the connecting pipe 301, and a nozzle head 305 is fixedly connected to the top of the retaining ring 304. The temperature sensor 203 can monitor the temperature changes inside the nozzle chamber 202 in real time. This high-precision monitoring ensures the accuracy of temperature control. By adjusting the power of the electric heater through an external power source, it can quickly respond to temperature changes and adjust the heating power in time to ensure that the internal temperature of the nozzle chamber 202 is always kept within the set range. Precise temperature control can effectively reduce the temperature fluctuation inside the nozzle chamber 202, ensuring that the plastic maintains good fluidity during injection, thereby improving the quality and consistency of the molded product.

[0028] like Figure 1 and Figure 2 As shown, the main body 1 includes a nozzle seat 101, which has an internal thread 102. The internal thread 102 is connected to a threaded rod 104. The top of the threaded rod 104 is fixedly connected to a connecting seat 103. The nozzle seat 101 and the nozzle body are connected by the internal thread 102 and the threaded rod 104, which makes the nozzle disassembly operation simpler and faster, and reduces the difficulty and labor intensity of installation.

[0029] The working process of this utility model is as follows: When a hot runner nozzle designed using this solution is in operation, the nozzle body can be threadedly connected and fixed to the nozzle seat 101 using the built-in thread 102 and threaded rod 104. An elastic sealing ring 302 and a sealing gasket 303 are installed. An external color-changing device is connected through a quick connector 204. The electric heater is started to raise the internal temperature of the nozzle to the material's flow temperature. Then, the old color material is discharged through the color-changing channel, and a new color material is injected. During the color-changing process, the elastic sealing ring 302 and the sealing gasket 303 ensure that the material does not leak. The temperature sensor 203 monitors the temperature in real time. The power of the electric heater is adjusted by an external power supply to achieve precise control of the internal temperature of the nozzle chamber 202.

[0030] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A nozzle for hot runner comprising a main body (1), characterized in that, A nozzle assembly (2) is provided on the top of the main body (1), and a sealing assembly (3) is provided on the top of the nozzle assembly (2). The nozzle assembly (2) includes a connecting plate (201), a nozzle chamber (202) is fixedly connected to the top of the connecting plate (201), a temperature sensor (203) is installed on the side of the nozzle chamber (202), and an electric heater is provided inside the nozzle chamber (202). The sealing assembly (3) includes a connecting pipe (301), and an elastic sealing ring (302) is provided on the side of the connecting pipe (301), and a sealing gasket (303) is provided on the elastic sealing ring (302).

2. A hot runner nozzle according to claim 1, wherein The nozzle chamber (202) is provided with a color-changing channel inside, and a quick connector (204) is fixedly connected to the top of the nozzle chamber (202), and the quick connector (204) is connected to the color-changing channel.

3. A hot- runner nozzle according to claim 2, wherein The nozzle chamber (202) is equipped with a nozzle core, and the color-changing channel is connected to the flow channel of the nozzle core.

4. The hot runner nozzle of claim 1 wherein, The electric heater is connected to an external power source and the temperature inside the nozzle chamber (202) is monitored in real time by a temperature sensor (203).

5. The hot runner nozzle of claim 1 wherein, Both the elastic sealing ring (302) and the sealing gasket (303) are made of rubber.

6. A nozzle for a hot runner according to claim 1, characterized in that, A retaining ring (304) is fixedly connected to the top of the connecting pipe (301), and a nozzle head (305) is fixedly connected to the top of the retaining ring (304).

7. A hot-duct nozzle according to claim 1 wherein, The main body (1) includes a nozzle seat (101), and the nozzle seat (101) has an internal thread (102).

8. A hot-duct nozzle according to claim 7, wherein The internal thread of the built-in thread (102) is connected to a threaded rod (104), and a connecting seat (103) is fixedly connected to the top of the threaded rod (104).

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