Anti-return injection nozzle for cold runner

Abstract

The utility model relates to the technical field of anti-return glue injection nozzles, specifically to an anti-return glue injection nozzle applied to a cold runner, the anti-return glue injection nozzle applied to the cold runner, the anti-return glue valve is made into a structure with a small top and a large bottom, this structure will be blocked when the rubber returns, after the injection is completed, during the retraction of the main nozzle head, the anti-return glue valve can effectively prevent the rubber from flowing back from the cold runner. The anti-return glue injection nozzle applied to the cold runner, the anti-return glue valve is made into a structure with a small top and a large bottom, this structure will be blocked when the rubber returns, after the injection is completed, during the retraction of the main nozzle head, the anti-return glue valve can effectively prevent the rubber from flowing back from the cold runner.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-glue return injection nozzles, in particular to an anti-glue return injection nozzle used in a cold runner. Background Art

[0002] Vulcanizer is a machine that vulcanizes various rubber and plastic products. It has functions such as timed mold locking, automatic pressure replenishment, automatic temperature control, automatic timing, and time alarm. Vulcanizers are divided into three types: electric heating, steam heating, and thermal oil heating. It is also called flat plate vulcanizer, foam plate vulcanizer, and rubber vulcanizer.

[0003] When the rubber vulcanizer is working, the machine nozzle will return the material to the storage material and then shoot again after each rubber injection. During the return process, the material in the cold runner cavity will slightly reflux, affecting the subsequent injection work. For this reason, we propose an anti-return injection nozzle for cold runner. Utility Model Content

[0004] The utility model aims to provide an anti-return glue injection nozzle applied to a cold runner to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A backflow prevention injection nozzle used in a cold runner comprises a main nozzle head, the upper surface of the main nozzle head is fixedly connected to a main body connection part, a feed port is provided at the center of the upper surface of the main body connection part, the bottom surface of the main nozzle head is fixedly connected to a nozzle connection part, an injection channel is provided inside the nozzle connection part, the injection channel is connected to the feed port, the injection channel is narrow at the top and wide at the bottom, and an anti-backflow valve is installed inside the injection channel near the feed port.

[0007] Preferably, the cross section of the main body connection portion is hexagonal, and the outer surface of the nozzle connection portion is provided with threads.

[0008] Preferably, the anti-reflux valve is a horizontal plate which is narrow at the top and wide at the bottom, and the vertical cross-section of the anti-reflux valve is an isosceles trapezoid.

[0009] Preferably, the anti-reflux valve is a horizontal plate which is narrow at the top and wide at the bottom, and the vertical cross-section of the anti-reflux valve is an isosceles trapezoid with a rectangle connected to the bottom.

[0010] Preferably, the anti-backflow valve is a triangular plate that is narrow at the top and wide at the bottom, and the vertical section of each plate of the anti-backflow valve is a triangle.

[0011] Preferably, the anti-reflux valve is a cross-shaped valve that is narrow at the top and wide at the bottom.

[0012] Compared with the prior art, the utility model provides an anti-return glue injection nozzle applied to the cold runner, which has the following beneficial effects:

[0013] The anti-return injection nozzle used in the cold runner has an anti-return valve with a small upper part and a large lower part. This structure will block the rubber when it returns. When the injection is completed, during the retraction of the main nozzle head, the anti-return valve can effectively prevent the rubber from flowing back from the cold runner. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main nozzle head structure of the utility model;

[0015] Figure 2 This is a structural schematic diagram of the first embodiment of the anti-backflow valve of the utility model;

[0016] Figure 3 This is a structural schematic diagram of the second embodiment of the anti-backflow valve of the utility model;

[0017] Figure 4 This is a schematic structural diagram of the third embodiment of the anti-backflow valve of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the fourth embodiment of the anti-backflow valve of the utility model.

[0019] In the figure: 1. Main nozzle head; 2. Main body connection part; 3. Feed inlet; 4. Nozzle connection part; 5. Injection channel; 6. Anti-backflow valve. DETAILED DESCRIPTION

[0020] See also Figure 1 A rubber return prevention injection nozzle for cold runner comprises a main nozzle head 1, a main body connection part 2 is fixedly connected to the upper surface of the main nozzle head 1, a feed port 3 is provided at the center of the upper surface of the main body connection part 2, which is used to connect the discharge port of the vulcanizer to ensure that the molten rubber can smoothly enter the injection nozzle, a nozzle connection part 4 is fixedly connected to the bottom surface of the main nozzle head 1, an injection channel 5 is provided inside the nozzle connection part 4, the injection channel 5 is connected to the feed port 3, the injection channel 5 is narrow at the top and wide at the bottom, and an anti-reflux valve 6 is installed inside the injection channel 5 near the feed port 3 to ensure that the rubber can smoothly pass through during the injection process and can effectively prevent the rubber from flowing back after the injection is completed.

[0021] Furthermore, the cross-section of the main body connection part 2 is hexagonal, which is convenient for disassembly, and the outer surface of the nozzle connection part 4 is provided with threads, which facilitates the installation of the nozzle on the nozzle connection part 4.

[0022] Example 1, see Figure 2 The anti-reflux valve 6 is a horizontal plate that is narrow at the top and wide at the bottom, and the vertical cross-section of the anti-reflux valve 6 is an isosceles trapezoid.

[0023] Example 2, see Figure 3The anti-reflux valve 6 is a horizontal plate that is narrow at the top and wide at the bottom, and the vertical cross-section of the anti-reflux valve 6 is an isosceles trapezoid connected to a rectangle at the bottom.

[0024] Example 3, see Figure 4 The anti-reflux valve 6 is a triangular plate that is narrow at the top and wide at the bottom, and the vertical section of each prism of the anti-reflux valve 6 is a triangle.

[0025] Example 4, see Figure 5 The anti-reflux valve 6 is a cross-shaped valve having a narrow top and a wide bottom.

[0026] According to different needs, the anti-backflow valve 6 can be designed into a variety of shapes, such as an isosceles trapezoid, a combination of a trapezoid and a rectangle, a triangular plate (the vertical section of each plate is a triangle), a cross, etc. These designs all utilize the principle of being narrow at the top and wide at the bottom to ensure that the rubber can pass smoothly during the injection process. After the injection is completed, during the retraction process of the main nozzle head 1, the rubber can be effectively prevented from flowing back from the cold runner.

[0027] Working principle: The anti-return injection nozzle used in the cold runner has an anti-return valve 6 that is small on the top and large on the bottom. This structure will block the rubber when it returns. When the injection is completed, during the retraction of the main nozzle head 1, the anti-return valve 6 can effectively prevent the rubber from flowing back from the cold runner.

Claims

1. An anti-glue return injection nozzle for cold runner, comprising a main nozzle head (1), characterized in that: The upper surface of the main nozzle head (1) is fixedly connected to a main body connection part (2), a feed port (3) is provided at the center of the upper surface of the main body connection part (2), the bottom surface of the main nozzle head (1) is fixedly connected to a nozzle connection part (4), an injection channel (5) is provided inside the nozzle connection part (4), the injection channel (5) is connected to the feed port (3), the injection channel (5) is narrow at the top and wide at the bottom, and a backflow prevention valve (6) is installed inside the injection channel (5) near the feed port (3).

2. The anti-return injection nozzle used in the cold runner according to claim 1, characterized in that: The cross section of the main body connection part (2) is hexagonal, and the outer surface of the nozzle connection part (4) is provided with threads.

3. The anti-glue injection nozzle used in the cold runner according to claim 1, characterized in that: The anti-backflow valve (6) is a horizontal plate which is narrow at the top and wide at the bottom, and the vertical cross section of the anti-backflow valve (6) is an isosceles trapezoid.

4. The anti-return injection nozzle used in the cold runner according to claim 1, characterized in that: The anti-reflux valve (6) is a horizontal plate which is narrow at the top and wide at the bottom, and the vertical cross-section of the anti-reflux valve (6) is an isosceles trapezoid with a rectangle connected to the bottom.

5. The anti-return injection nozzle used in the cold runner according to claim 1, characterized in that: The anti-backflow valve (6) is a triangular plate that is narrow at the top and wide at the bottom, and the vertical section of each plate of the anti-backflow valve (6) is a triangle.

6. The anti-return injection nozzle used in the cold runner according to claim 1, characterized in that: The anti-backflow valve (6) is in the shape of a cross which is narrow at the top and wide at the bottom.

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