Inner spring nozzle structure

Abstract

The utility model relates to the field of nozzles of injection molding machine flanges, and discloses an inner spring nozzle structure which comprises a nozzle connecting body, a sleeve is fixedly connected to the inner wall of the nozzle connecting body, a spring is arranged in the sleeve in a sleeved mode, a gasket is fixedly connected to the left end of the spring, and a needle seat is fixedly connected to the interior of the sleeve. A round bar is slidably connected to the interior of the needle base, a glue sealing needle is fixedly connected to the left end of the round bar, a nozzle head is fixedly connected to the left side of the nozzle connecting body, the outer portion of the gasket is slidably connected to the inner wall of the sleeve, the left side of the gasket abuts against the right side of the needle base, and the outer portion of the needle base is fixedly connected to the interior of the nozzle connecting body; the exterior of the glue sealing needle is slidably connected to the interior of the needle base. According to the utility model, the gasket is pushed by the spring, and the round bar pushes the glue sealing needle to abut against the opening of the nozzle head under the connection of the sleeve and the needle seat, so that glue is prevented from overflowing at high temperature, and the salivation phenomenon is avoided.

Description

Technical Field

[0001] This utility model relates to the field of injection nozzles for injection molding machine flanges, and more particularly to an internal spring injection nozzle structure. Background Technology

[0002] The nozzle of an injection molding machine flange is a key component that injects molten plastic into the mold cavity during the injection molding process, directly affecting the molding quality and production efficiency of plastic products. Its structure consists of a nozzle head, a heating coil, and a connector. The nozzle head is the front end that contacts the mold and must have good wear resistance and high temperature resistance. The heating coil can maintain the temperature of the molten plastic and prevent it from cooling and solidifying during injection. The connector ensures a stable connection between the nozzle and the injection molding machine flange.

[0003] Based on their structure and application, nozzles can be divided into open nozzles, needle valve nozzles, and other types. Open nozzles have a simple structure and low melt flow resistance, making them suitable for plastic products that require high molding precision and are sensitive to gate marks. In addition, the nozzle's diameter, length, and other parameters need to be selected reasonably according to the characteristics of the plastic raw material, the shape and size of the product, etc., to ensure that the plastic melt is injected into the mold at appropriate pressure, speed and temperature, thereby ensuring the molding quality of the plastic product and improving production efficiency.

[0004] Open nozzles are commonly used components in injection molding machine flanges. Due to their simple structure, they offer low resistance to melt flow, allowing for rapid injection of plastic into the mold. However, during the injection molding process, the lack of a closed control structure makes them prone to drooling, which affects the appearance of the product and the production environment. To address this issue, an internal spring nozzle structure is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an internal spring nozzle structure, which aims to improve the problem that traditional nozzles are prone to drooling during injection molding due to the lack of a closing control structure, thus affecting the appearance of the product and the production environment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an internal spring nozzle structure, comprising a nozzle connector, a sleeve fixedly connected to the inner wall of the nozzle connector, a spring sleeved inside the sleeve, a gasket fixedly connected to the left end of the spring, a needle seat fixedly connected inside the sleeve, a round rod slidably connected inside the needle seat, a sealing needle fixedly connected to the left end of the round rod, and a nozzle head fixedly connected to the left side of the nozzle connector.

[0007] As a further description of the above technical solution:

[0008] The gasket is externally slidably connected to the inner wall of the sleeve.

[0009] As a further description of the above technical solution:

[0010] The left side of the gasket and the right side of the needle seat abut against each other.

[0011] As a further description of the above technical solution:

[0012] The needle seat is externally fixedly connected to the inside of the nozzle connector.

[0013] As a further description of the above technical solution:

[0014] The sealing needle is externally slidably connected to the inside of the needle hub.

[0015] As a further description of the above technical solution:

[0016] The left side of the sealing needle abuts against the inner wall of the nozzle head.

[0017] As a further description of the above technical solution:

[0018] The nozzle head is fitted inside the needle seat.

[0019] As a further description of the above technical solution:

[0020] The round bar is sleeved inside the sleeve.

[0021] This utility model has the following beneficial effects:

[0022] In this invention, by using a spring to push the gasket, and with the connection between the sleeve and the needle seat, the round bar pushes the sealing needle to press against the opening of the nozzle head, thereby preventing the glue from overflowing at high temperatures and avoiding drooling. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of an internal spring nozzle structure proposed in this utility model;

[0024] Figure 2 This is a schematic diagram of the nozzle connector of the internal spring nozzle structure proposed in this utility model;

[0025] Figure 3 This is a schematic diagram of the sleeve structure of the internal spring nozzle structure proposed in this utility model;

[0026] Figure 4 This is a schematic diagram of the needle holder of an internal spring nozzle structure proposed in this utility model;

[0027] Figure 5 This is a schematic diagram of the sealing needle with an internal spring nozzle structure proposed in this utility model;

[0028] Figure 6This is a schematic diagram of the nozzle head of an internal spring nozzle structure proposed in this utility model.

[0029] Legend:

[0030] 1. Nozzle connector; 2. Sleeve; 3. Spring; 4. Gasket; 5. Needle seat; 6. Round bar; 7. Sealing needle; 8. Nozzle head. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1-4 This utility model provides an embodiment of an internal spring nozzle structure, comprising a nozzle connector 1, a sleeve 2 fixedly connected to the inner wall of the nozzle connector 1, a spring 3 sleeved inside the sleeve 2, a gasket 4 fixedly connected to the left end of the spring 3, a needle seat 5 fixedly connected inside the sleeve 2, a round rod 6 slidably connected inside the needle seat 5, a sealing needle 7 fixedly connected to the left end of the round rod 6, and a nozzle head 8 fixedly connected to the left side of the nozzle connector 1. The nozzle connector 1 is used to connect and protect internal parts, the sleeve 2 is used to keep the spring 3 stable, the spring 3 is used to push the gasket 4 to move, the gasket 4 is used to drive the round rod 6 to move, the needle seat 5 is used to limit the movement direction of the round rod 6 and the sealing needle 7, and the round rod 6 is used to push the sealing needle 7 to move. The sealing needle 7 is used to block the opening of the nozzle head 8, which is used to directly contact the injection mold to achieve injection molding. The gasket 4 is externally slidably connected to the inner wall of the sleeve 2 to restrict the movement direction of the gasket 4. The left side of the gasket 4 and the right side of the needle seat 5 abut against each other to restrict the movement distance of the gasket 4. The needle seat 5 is externally fixedly connected to the inside of the nozzle connector 1 to keep the needle seat 5 stable. The sealing needle 7 is externally slidably connected to the inside of the needle seat 5 to restrict the movement direction of the sealing needle 7. The left side of the sealing needle 7 abuts against the inner wall of the nozzle head 8 to prevent drooling. The nozzle head 8 is internally sleeved on the outside of the needle seat 5 to keep the needle seat 5 stable. The round bar 6 is externally sleeved on the inside of the sleeve 2 to keep the round bar 6 stable.

[0033] Working principle: When using this device, the raw material is injected into the mold through the opening of the nozzle head 8. The compression spring 3 causes the sealing needle 7 to disengage from the nozzle head 8. After the injection is completed, the spring 3 will immediately push the gasket 4. Under the limit of the needle seat 5, the round bar 6 drives the sealing needle 7 to move synchronously, so that the sealing needle 7 blocks the opening of the nozzle head 8, preventing the glue from overflowing at high temperature and avoiding drooling, which would affect the appearance of the product and the production environment.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An inner spring nozzle structure comprising a nozzle connecting body (1), characterized in that: The nozzle connecting body (1) is fixedly connected with a sleeve (2) on the inner wall, the sleeve (2) is sleeved with a spring (3) inside, the left end of the spring (3) is fixedly connected with a gasket (4), the sleeve (2) is fixedly connected with a needle seat (5) inside, the needle seat (5) is slidably connected with a round stick (6) inside, the left end of the round stick (6) is fixedly connected with a sealing glue needle (7), and the left side of the nozzle connecting body (1) is fixedly connected with a nozzle head (8).

2. An inner spring nozzle structure according to claim 1, characterized in that: The gasket (4) is slidably connected on the inner wall of the sleeve (2).

3. An inner spring nozzle structure according to claim 1, characterized in that: The left side of the gasket (4) and the right side of the needle seat (5) abut.

4. An inner spring nozzle structure according to claim 1, characterized in that: The needle seat (5) is fixedly connected on the inside of the nozzle connecting body (1).

5. An inner spring nozzle structure according to claim 1, characterized in that: The sealing glue needle (7) is slidably connected inside the needle seat (5).

6. An inner spring nozzle structure according to claim 1, characterized in that: The left side of the sealing glue needle (7) and the inner wall of the nozzle head (8) abut.

7. An inner spring nozzle structure according to claim 1, characterized in that: The nozzle head (8) is sleeved on the outside of the needle seat (5).

8. An inner spring nozzle structure according to claim 1, characterized in that: The round stick (6) is sleeved on the inside of the sleeve (2).

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