Injection molding machine nozzle

Abstract

The utility model discloses an injection molding machine nozzle relates to injection molding machine technical field, including injection molding machine nozzle main part, the injection molding machine nozzle main part includes the nozzle, the both ends of nozzle are provided with connecting structure, and the front end of connecting structure is provided with nozzle structure, the connecting structure includes injection molding machine connecting unit and nozzle connecting unit. The utility model discloses through the middle connecting pipe plays to separate the connection of injection molding machine nozzle and nozzle, and the flange no.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and specifically to an injection nozzle for an injection molding machine. Background Technology

[0002] With the widespread application of plastic materials in various industrial fields, the manufacturing processes, technologies, and equipment for plastic materials have also developed significantly. Injection molding is one of the most commonly used plastic material manufacturing technologies. Injection molding generally involves melting resin material in a barrel, then using a screw to propel the molten material through a nozzle into the mold cavity. After curing, the molded product is obtained. The nozzle is the transition part connecting the barrel and the mold. Existing traditional injection molding nozzles are generally of a one-piece structure. During the injection process, the nozzle of the injection molding nozzle frequently collides with the mold. Furthermore, when the nozzle needs to be replaced, the entire injection molding nozzle must be replaced, resulting in high costs. Therefore, this utility model proposes an injection molding machine nozzle.

[0003] In the prior art, a Chinese patent document with publication number CN211807479U and publication date of October 30, 2020, was proposed to solve the above-mentioned technical problem. The technical solution disclosed in this patent document is as follows: A nozzle for an injection molding machine includes a nozzle body and a nozzle. The nozzle body is provided with a first spray chamber for molten material spraying, and the nozzle is provided with a second spray chamber for molten material spraying. One end of the nozzle body is connected to the injection molding machine so that the molten material on the injection molding machine can be sprayed into the first spray chamber. The other end of the nozzle body is transitionally connected to one end of the nozzle. The other end of the nozzle is provided with a nozzle opening communicating with the second spray chamber. After the nozzle and the nozzle body are transitionally connected, the first spray chamber can communicate with the second spray chamber to form a spray channel for spraying molten plastic. After the injection molding machine is heated, due to the influence of thermal expansion and contraction, the transitional fit between the nozzle and the nozzle body changes to an interference fit to prevent the molten plastic in the spray channel from entering the mating surface at the connection between the nozzle and the nozzle body, thereby preventing jamming when the nozzle needs to be replaced.

[0004] To address the issue of difficulty in disassembling the nozzle of a threaded injection nozzle when the thread is stuck, existing technology employs a transitional fit connection between the nozzle body's connecting part and the nozzle's mating part. Utilizing the principle of thermal expansion and contraction, the transitional fit between the connecting part and the mating part is transformed into an interference fit after heating in the injection molding machine. However, issues still arise where the interference fit is difficult to disassemble due to its high coefficient of friction, and the transitional fit is prone to leakage during cooling. This, in turn, leads to a fragmented overall structure lacking necessary connecting components. Utility Model Content

[0005] The purpose of this invention is to provide an injection nozzle for an injection molding machine to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] An injection molding machine nozzle includes an injection molding machine nozzle body, the injection molding machine nozzle body including a nozzle, the nozzle having connecting structures at both ends, and a nozzle structure at the front end of the connecting structures; the connecting structures include an injection molding machine connecting unit and a nozzle connecting unit, the injection molding machine connecting unit being disposed at the rear end of the nozzle, and the nozzle connecting unit being disposed at the front end of the nozzle; the nozzle structure includes a nozzle unit and a nozzle mounting unit, the nozzle mounting unit being disposed at the front end of the nozzle connecting unit, and the nozzle unit being disposed at the front end of the nozzle mounting unit.

[0008] A further improvement of the present invention is that the injection molding machine connection unit includes a first connecting flange fixedly installed at the rear end of the nozzle, and a second connecting flange fixedly installed at the front end of the nozzle.

[0009] Using the above technical solution, connecting flange one and connecting flange two are welded to the front and rear ends of the nozzle, respectively.

[0010] A further improvement of this utility model is that a welded reinforcing strip is fixedly installed between the first connecting flange and the second connecting flange, the welded reinforcing strip is evenly distributed on the outer side wall of the nozzle, and a sealing ring is snapped onto the inner side of the second connecting flange.

[0011] Using the above technical solution, the inner surface of the welding reinforcement strip is supported by the inner wall of the nozzle, and a snap ring adapted to the sealing ring is provided on the inner side of the connecting flange two.

[0012] A further improvement of the present invention is that the nozzle connection unit includes a central connecting pipe that is snapped onto the front end of the welding reinforcement strip, the inner retaining ring at the rear end of the central connecting pipe is in contact with the inner surface of the sealing ring, and a particulate matter interception mesh is fixedly installed inside the central connecting pipe.

[0013] Using the above technical solution, snap rings are provided at the front and rear ends of the middle connecting pipe to surround and snap the connecting flanges 2 and 3.

[0014] A further improvement of this utility model is that: the nozzle unit includes a nozzle, an anti-clogging ring is fixedly installed on the inner wall of the front end of the nozzle, and a movable pin is movably installed in the middle of the anti-clogging ring.

[0015] Using the above technical solution, the anti-clogging ring is a triangular welded ring with a circular ring in the middle, and the movable pin is a spindle structure with guide vanes on its surface.

[0016] A further improvement of the present invention is that the nozzle mounting unit includes a connecting flange three fixedly mounted at the rear end of the nozzle, and a sealing ring two is snapped onto the inner surface of the connecting flange three.

[0017] Using the above technical solution, the structure of connecting flange three is the same as that of connecting flange two.

[0018] A further improvement of this utility model is that: the rear end of the connecting flange three is snapped into the front end of the middle connecting pipe, and the inner surface of the sealing ring two is in contact with the inner retaining ring at the front end of the middle connecting pipe.

[0019] Using the above technical solution, the structure of sealing ring two is the same as that of sealing ring one.

[0020] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0021] 1. This utility model provides an injection nozzle for an injection molding machine. The nozzle is the injection chamber tube of the injection molding machine nozzle. The connecting flange one at its rear end facilitates installation with the discharge pipe of the injection molding machine, and the connecting flange two facilitates installation with the middle connecting pipe. The welded reinforcing strip between the connecting flange two and the connecting flange one plays a reinforcing role when the pressure on the inner wall of the nozzle suddenly increases, thereby extending the service life of the nozzle.

[0022] 2. This utility model provides an injection molding machine nozzle. The middle connecting pipe separates the injection molding machine nozzle from the spray nozzle. Connecting flange two and connecting flange three are respectively snapped into the middle connecting pipe, which facilitates installation and disassembly and allows the nozzle to be replaced individually. Sealing ring two and sealing ring one use the principle of thermal expansion and contraction to squeeze and seal the connection between connecting flange three and connecting flange two and the middle connecting pipe, respectively, to ensure airtightness. The particulate matter interception mesh is set as an arc-shaped cover along the spray direction of the injection liquid, which not only guides the flow and polymerizes but also intercepts the particulate matter contained in the injection liquid.

[0023] 3. This utility model provides an injection nozzle for an injection molding machine. The anti-clogging ring serves to movably install the movable pin. The movable pin is a spindle structure with guide vanes on its surface. When the injection liquid is sprayed out, the movable pin rotates and moves under the changes in pressure and airflow, preventing blockage and clumping inside the anti-clogging ring. At the same time, when placed vertically, it plays the role of draining residual injection liquid. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is an exploded view of the structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the rear end of the structure of this utility model;

[0027] Figure 4 This is a schematic diagram of the front end of the structure of this utility model;

[0028] Figure 5 This is a schematic cross-sectional view of the structure of this utility model.

[0029] In the diagram: 1. Injection molding machine nozzle body; 11. Nozzle; 2. Connecting structure; 21. Connecting flange one; 22. Connecting flange two; 221. Sealing ring one; 23. Welded reinforcing strip; 24. Middle connecting pipe; 241. Particulate matter interception mesh cover; 3. Nozzle structure; 31. Nozzle; 32. Connecting flange three; 321. Sealing ring two; 33. Anti-clogging ring; 34. Movable pin. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to embodiments:

[0031] Example 1

[0032] like Figure 1-5 As shown, this utility model provides an injection molding machine nozzle, including an injection molding machine nozzle body 1, the injection molding machine nozzle body 1 including a nozzle 11, connecting structures 2 provided at both ends of the nozzle 11, and a nozzle structure 3 provided at the front end of the connecting structure 2; the connecting structure 2 includes an injection molding machine connecting unit and a nozzle connecting unit, the injection molding machine connecting unit being located at the rear end of the nozzle 11, and the nozzle connecting unit being located at the front end of the nozzle 11; the nozzle structure 3 includes a nozzle unit and a nozzle mounting unit, the nozzle mounting unit being located at the front end of the nozzle connecting unit, and the nozzle unit being located at the front end of the nozzle mounting unit; the injection molding machine connecting unit includes a connecting flange fixedly mounted at the rear end of the nozzle 11. 21. A connecting flange 22 is fixedly installed at the front end of the nozzle 11. The nozzle 11 is the injection chamber tube of the injection machine nozzle. The connecting flange 21 at its rear end facilitates installation with the discharge pipe of the injection machine. A welded reinforcing strip 23 is fixedly installed between the connecting flange 21 and the connecting flange 22. The welded reinforcing strip 23 is evenly distributed on the outer wall of the nozzle 11. A sealing ring 221 is snapped onto the inner side of the connecting flange 22. The connecting flange 22 facilitates installation with the middle connecting pipe 24. The welded reinforcing strip 23 between the connecting flange 22 and the connecting flange 21 plays a reinforcing role when the pressure on the inner wall of the nozzle 11 suddenly increases, thus extending the service life of the nozzle 11.

[0033] Example 2

[0034] like Figure 1-5As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the nozzle connection unit includes a central connecting pipe 24 snapped onto the front end of the welded reinforcing strip 23. The inner retaining ring at the rear end of the central connecting pipe 24 contacts the inner surface of the sealing ring 221. A particulate matter trapping mesh 241 is fixedly installed inside the central connecting pipe 24. The central connecting pipe 24 serves to separate the injection molding machine nozzle from the spray nozzle. Connecting flange 22 and connecting flange 32 are snapped onto the central connecting pipe 24, facilitating installation and disassembly. Nozzle 31 can be replaced separately. The nozzle unit includes nozzle 31. An anti-clogging ring 33 is fixedly installed on the inner wall of the front end of nozzle 31. A movable pin 34 is movably installed in the middle of the anti-clogging ring 33. Sealing ring 221 and sealing ring 121 use the principle of thermal expansion and contraction to squeeze and seal the joint between connecting flange 32, connecting flange 22 and the middle connecting pipe 24 to ensure sealing. The particulate matter interception mesh cover 241 is set as an arc-shaped cover along the direction of injection molding liquid spraying. While guiding the polymerization, it intercepts the particulate matter contained in the injection molding liquid.

[0035] Example 3

[0036] like Figure 1-5 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the nozzle mounting unit includes a connecting flange 32 fixedly installed at the rear end of the nozzle 31. A sealing ring 321 is snapped onto the inner surface of the connecting flange 32. The rear end of the connecting flange 32 is snapped onto the front end of the middle connecting pipe 24. The inner surface of the sealing ring 321 contacts the inner retaining ring at the front end of the middle connecting pipe 24. The anti-clogging ring 33 serves to movably mount the movable pin 34. The movable pin 34 has a spindle-shaped structure at both ends and has guide vanes on its surface. When the injection molding liquid is sprayed out, the movable pin 34 rotates and moves under the changes in pressure and airflow, preventing the anti-clogging ring 33 from becoming clogged and lumpy. At the same time, when placed vertically, it serves to drain the residual injection molding liquid.

[0037] The working principle of the injection nozzle of this injection molding machine will be explained in detail below.

[0038] like Figure 1-5As shown, firstly, the connecting flange 21 at the rear end of the nozzle 11 is installed with the discharge pipe of the injection molding machine. Then, the connecting flange 22 and the connecting flange 32 are respectively snapped into the middle connecting pipe 24, which facilitates installation and disassembly and allows the nozzle 31 to be replaced individually. The sealing ring 221 and the sealing ring 221 use the principle of thermal expansion and contraction to squeeze and seal the snap-fit ​​joints of the connecting flange 32, the connecting flange 22 and the middle connecting pipe 24. Finally, when the injection liquid is sprayed out, the welded reinforcing strip 23 plays a reinforcing role when the pressure on the inner wall of the nozzle 11 suddenly increases. The particulate matter interception mesh 241 is set as an arc-shaped cover along the spray direction of the injection liquid, which intercepts the particulate matter contained in the injection liquid while guiding the flow and polymerizing. The movable pin 34 is a spindle structure with guide blades on its surface. When the injection liquid is sprayed out, the movable pin 34 rotates and moves under the change of pressure and airflow, preventing the anti-clogging ring 33 from becoming clogged and agglomerated.

[0039] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An injection molding machine nozzle, comprising an injection molding machine nozzle body (1), wherein the injection molding machine nozzle body (1) includes a nozzle (11), characterized in that: The nozzle (11) is provided with connecting structures (2) at both ends, and the front end of the connecting structure (2) is provided with a nozzle structure (3); The connection structure (2) includes an injection molding machine connection unit and a nozzle connection unit. The injection molding machine connection unit is located at the rear end of the nozzle (11), and the nozzle connection unit is located at the front end of the nozzle (11). The nozzle structure (3) includes a nozzle unit and a nozzle mounting unit. The nozzle mounting unit is located at the front end of the nozzle connection unit, and the nozzle unit is located at the front end of the nozzle mounting unit.

2. The injection nozzle for an injection molding machine according to claim 1, characterized in that: The injection molding machine connection unit includes a first connecting flange (21) fixedly installed at the rear end of the nozzle (11), and a second connecting flange (22) fixedly installed at the front end of the nozzle (11).

3. The injection nozzle for an injection molding machine according to claim 2, characterized in that: A welded reinforcing strip (23) is fixedly installed between the first connecting flange (21) and the second connecting flange (22). The welded reinforcing strip (23) is evenly distributed on the outer side wall of the nozzle (11). A sealing ring (221) is snapped onto the inner side of the second connecting flange (22).

4. The injection nozzle for an injection molding machine according to claim 1, characterized in that: The nozzle connection unit includes a central connecting pipe (24) that is snapped onto the front end of the welding reinforcement strip (23). The inner retaining ring at the rear end of the central connecting pipe (24) is in contact with the inner surface of the sealing ring (221). A particulate matter interception mesh (241) is fixedly installed inside the central connecting pipe (24).

5. The injection nozzle for an injection molding machine according to claim 1, characterized in that: The nozzle unit includes a nozzle (31), and an anti-clogging ring (33) is fixedly installed on the inner wall of the front end of the nozzle (31). A movable pin (34) is movably installed in the middle of the anti-clogging ring (33).

6. The injection nozzle for an injection molding machine according to claim 1, characterized in that: The nozzle mounting unit includes a connecting flange three (32) fixedly installed at the rear end of the nozzle (31), and a sealing ring two (321) is snapped onto the inner surface of the connecting flange three (32).

7. The injection nozzle for an injection molding machine according to claim 6, characterized in that: The rear end of the connecting flange three (32) is snapped into the front end of the middle connecting pipe (24), and the inner surface of the sealing ring two (321) is in contact with the inner retaining ring at the front end of the middle connecting pipe (24).

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