Needle valve type hot runner assembly

Abstract

The utility model relates to the technical field of injection molding, in particular to a needle valve type hot runner assembly which comprises a main body, and the side surface of the main body is fixedly connected with a valve body assembly; the valve needle is controlled through stretching of the electric control telescopic rod, vertical movement of the valve needle in the valve bin is achieved, opening and closing of the pouring gate are adjusted, accurate movement of the valve needle, control over the opening and closing time of the pouring gate and reduction of salivation and dripping phenomena can be achieved through cooperation with the PLC, the integrated design is adopted, the number of parts is reduced, and the production cost is reduced. The rubber sealing ring has good elasticity and can generate uniform elastic deformation at the joint, so that the rubber sealing ring is tightly attached to the contact surface of the driving mechanism and the valve bin, melt or a cooling medium is effectively prevented from leaking, the rubber material can adapt to certain temperature and pressure changes, and the service life of the valve is prolonged. Even if the temperature rises or the pressure fluctuates in the working process of the hot runner system, the rubber sealing ring can still keep good sealing performance to ensure the stability of the system.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a needle valve type hot runner assembly. Background Technology

[0002] In the injection molding process, the hot runner system is a key component for achieving efficient and high-quality molding. The hot runner system is a heating device used in injection molding. It keeps the plastic material in a molten state during the delivery process, thereby achieving continuous flow and precise distribution of the plastic. The hot runner system is usually installed inside the injection mold, connecting the nozzle of the injection molding machine and the gate of the mold, ensuring that the plastic maintains the appropriate temperature and fluidity before entering the mold cavity.

[0003] Compared to traditional cold runner systems, hot runner systems can significantly improve production efficiency, reduce costs, and improve the quality of injection molded products.

[0004] Traditional hot runner components suffer from several problems, such as inaccurate gate control, uneven melt temperature distribution, and drooling and dripping, which negatively impact molding efficiency and product quality. Needle valve hot runner components effectively address these issues through precise gate opening and closing. However, existing needle valve hot runner components still suffer from drawbacks such as complex structure, difficult maintenance, and short service life. Therefore, a needle valve hot runner component is needed to improve upon these shortcomings. Utility Model Content

[0005] To address the problems inherent in traditional hot runner components, such as inaccurate gate control, uneven melt temperature distribution, and drooling and dripping, which affect molding efficiency and product quality, needle valve hot runner components can effectively solve these problems through precise gate opening and closing. However, existing needle valve hot runner components still suffer from drawbacks such as complex structure, difficult maintenance, and short service life. The purpose of this invention is to provide a needle valve hot runner component to solve the problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A needle valve type hot runner assembly includes a main body, a valve body assembly fixedly connected to the side of the main body, and a drive assembly fixedly connected to the top of the valve body assembly.

[0008] The valve body assembly includes a valve seat, a valve chamber is fixedly connected to the top of the valve seat, a rubber sealing ring is provided on the top of the valve chamber, and the valve seat is made of copper alloy material;

[0009] The drive assembly includes a top base, an electrically controlled telescopic rod is mounted on the bottom of the top base, and a valve needle is fixedly connected to the output end of the electrically controlled telescopic rod. The valve needle is made of stainless steel.

[0010] As a preferred embodiment of this utility model, the valve chamber is provided with a blocking block and a limiting plate, and the valve needle extends into the interior of the valve chamber.

[0011] As a preferred embodiment of this utility model, a first connecting pipe is fixedly connected to one side of the valve seat, and a second connecting pipe is fixedly connected to the other side of the valve seat.

[0012] As a preferred embodiment of this utility model, a casting pipe is fixedly connected to the side of the second connecting pipe, and an output pipe is fixedly connected to the side of the casting pipe.

[0013] As a preferred embodiment of this utility model, the bottom of the top seat is fixedly connected to a support rod, and four support rods are provided. The support rods are fixedly connected to the valve chamber.

[0014] As a preferred embodiment of this utility model, the main body includes a hot runner body, a temperature sensor is fixedly connected to the top of the hot runner body, and a heating element is provided inside the hot runner body.

[0015] As a preferred embodiment of this utility model, an input pipe is fixedly connected to the side of the hot runner body, and a PLC controller is fixedly connected to the top of the hot runner body.

[0016] As a preferred embodiment of this utility model, a flow sensor is fixedly connected to the top of the hot runner body, and a cooling medium inlet is provided on the top of the hot runner body.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. In this utility model, the valve needle is controlled by the extension and retraction of the electric telescopic rod, thereby realizing the up and down movement of the valve needle inside the valve chamber, thus adjusting the opening and closing of the gate. In conjunction with the PLC controller, the valve needle can move precisely, control the opening and closing time of the gate, reduce drooling and dripping. The integrated design reduces the number of parts and lowers the maintenance difficulty.

[0019] 2. In this utility model, the rubber sealing ring has good elasticity and can produce uniform elastic deformation at the connection, thereby tightly fitting the contact surface between the drive mechanism and the valve chamber, effectively preventing leakage of melt or cooling medium. The rubber material can adapt to certain temperature and pressure changes. Even if the temperature rises or the pressure fluctuates during the operation of the hot runner system, the rubber sealing ring can still maintain good sealing performance to ensure the stability of the system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the heating and cooling assembly structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the drive component structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the valve body assembly structure of this utility model.

[0024] In the diagram: 1. Main body; 101. Hot runner body; 102. Temperature sensor; 103. PLC controller; 104. Flow sensor; 105. Cooling medium inlet; 106. Input pipe; 2. Valve body assembly; 201. Valve seat; 202. Valve chamber; 203. Rubber sealing ring; 204. First connecting pipe; 205. Second connecting pipe; 206. Casting pipe; 207. Output pipe; 3. Drive assembly; 301. Top seat; 302. Electrically controlled telescopic rod; 303. Barrier block; 304. Limiting plate; 305. Valve needle; 306. Support rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] For examples, please refer to Figures 1-4 This utility model provides a technical solution:

[0027] A needle valve type hot runner assembly includes a main body 1, and a valve body assembly 2 is fixedly connected to the side of the main body 1.

[0028] In this embodiment, as Figure 1 , Figure 3 and Figure 4As shown, a drive assembly 3 is fixedly connected to the top of the valve body assembly 2; the valve body assembly 2 includes a valve seat 201, a valve chamber 202 is fixedly connected to the top of the valve seat 201, a rubber sealing ring 203 is provided on the top of the valve chamber 202, and the valve seat 201 is made of copper alloy material; the drive assembly 3 includes a top seat 301, an electrically controlled telescopic rod 302 is installed at the bottom of the top seat 301, and a valve needle 305 is fixedly connected to the output end of the electrically controlled telescopic rod 302. The valve needle 305 is made of stainless steel material. The extension and retraction of the electrically controlled telescopic rod 302 controls the valve needle 305, realizing the up and down movement of the valve needle 305 inside the valve chamber 202, thereby adjusting the opening and closing of the gate. In conjunction with the PLC controller 103, it can realize the precise movement of the valve needle 305, control the opening and closing time of the gate, reduce drooling and dripping phenomena, adopt an integrated design, reduce the number of parts, and reduce maintenance difficulty.

[0029] The valve chamber 202 is equipped with a barrier block 303 and a limiting disc 304. The valve needle 305 extends into the valve chamber 202. A first connecting pipe 204 is fixedly connected to one side of the valve seat 201, and a second connecting pipe 205 is fixedly connected to the other side of the valve seat 201. A casting pipe 206 is fixedly connected to the side of the second connecting pipe 205, and an output pipe 207 is fixedly connected to the side of the casting pipe 206. A support rod 306 is fixedly connected to the bottom of the top seat 301. Four support rods 306 are provided. The support rods 306 are fixedly connected to the valve chamber 202. The rubber sealing ring 203 has good elasticity and can produce uniform elastic deformation at the connection point, thereby tightly fitting the contact surface between the drive mechanism and the valve chamber 202, effectively preventing leakage of melt or cooling medium. The rubber material can adapt to certain temperature and pressure changes. Even if the temperature rises or the pressure fluctuates during the operation of the hot runner system, the rubber sealing ring 203 can still maintain good sealing performance to ensure the stability of the system.

[0030] In this embodiment, as Figure 1 and Figure 2 As shown, the main body 1 includes a hot runner body 101. A temperature sensor 102 is fixedly connected to the top of the hot runner body 101. A heating element is installed inside the hot runner body 101. An input pipe 106 is fixedly connected to the side of the hot runner body 101. A PLC controller 103 is fixedly connected to the top of the hot runner body 101. A flow sensor 104 is fixedly connected to the top of the hot runner body 101. A cooling medium inlet 105 is opened on the top of the hot runner body 101. The heating element inside the hot runner body 101 and the cooling medium entering through the cooling medium inlet 105 can achieve a synergistic effect in accurately controlling the temperature of the hot runner body 101, which can maintain the temperature stability of the melt and improve the molding quality.

[0031] The working process of this utility model is as follows: When the needle valve type hot runner assembly designed in this embodiment is in operation, the hot runner body 101 is made of aluminum alloy and has an internal electric heating wire as a heating element. The valve needle 305 of the needle valve device is made of stainless steel, and the valve seat 201 is made of copper alloy. The valve needle 305 moves up and down by extending and retracting the electrically controlled telescopic rod 302. The connection between the rubber sealing ring 203 and the valve chamber 202 is sealed. The PLC controller 103 is used for control, so that the heating element and the cooling medium entering from the cooling medium inlet 105 can achieve precise control of the temperature of the hot runner body 101. The heating element provides a stable heat source, and the cooling medium removes excess heat in time, which can ensure that the hot runner body 101 operates within the set temperature range and reduce temperature fluctuations.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A needle valve type hot runner assembly, comprising a main body (1), characterized in that: A valve body assembly (2) is fixedly connected to the side of the main body (1), and a drive assembly (3) is fixedly connected to the top of the valve body assembly (2). The valve body assembly (2) includes a valve seat (201), a valve chamber (202) is fixedly connected to the top of the valve seat (201), a rubber sealing ring (203) is provided on the top of the valve chamber (202), and the valve seat (201) is made of copper alloy material; The drive assembly (3) includes a top seat (301), an electrically controlled telescopic rod (302) is installed at the bottom of the top seat (301), and a valve needle (305) is fixedly connected to the output end of the electrically controlled telescopic rod (302). The valve needle (305) is made of stainless steel.

2. The needle valve type hot runner assembly according to claim 1, characterized in that, The valve chamber (202) is provided with a barrier block (303) and a limiting disc (304), and the valve needle (305) extends into the interior of the valve chamber (202).

3. A needle valve type hot runner assembly according to claim 1, characterized in that, A first connecting pipe (204) is fixedly connected to one side of the valve seat (201), and a second connecting pipe (205) is fixedly connected to the other side of the valve seat (201).

4. A needle valve type hot runner assembly according to claim 3, characterized in that, The second connecting pipe (205) is fixedly connected to a casting pipe (206) on its side, and the casting pipe (206) is fixedly connected to an output pipe (207) on its side.

5. A needle valve type hot runner assembly according to claim 1, characterized in that, The bottom of the top seat (301) is fixedly connected to a support rod (306), and four support rods (306) are provided. The support rods (306) are fixedly connected to the valve chamber (202).

6. A needle valve type hot runner assembly according to claim 1, characterized in that, The main body (1) includes a hot runner body (101), a temperature sensor (102) is fixedly connected to the top of the hot runner body (101), and a heating element is provided inside the hot runner body (101).

7. A needle valve type hot runner assembly according to claim 6, characterized in that, An input pipe (106) is fixedly connected to the side of the hot runner body (101), and a PLC controller (103) is fixedly connected to the top of the hot runner body (101).

8. A needle valve type hot runner assembly according to claim 7, characterized in that, A flow sensor (104) is fixedly connected to the top of the hot runner body (101), and a cooling medium inlet (105) is opened on the top of the hot runner body (101).

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