Runner overturning structure

Abstract

The utility model discloses a runner overturning structure which comprises a flow injection pipe, a flow injection opening is fixedly connected to the bottom of the flow injection pipe, and a liquid distribution pipe is fixedly connected to the bottom of the flow injection opening. The annular reverse flow channel is fixedly connected to the outer side of the liquid separation pipe; the main runner is connected with the two ends of the annular reverse runner; the branch runner is vertically connected with the main runner; the water gap ferrules are fixedly connected to the left side and the right side of the sub-runner; the flow dividing pipe is fixedly connected to the outer side of the water gap ferrule; and the female mold cavity is connected with the shunting pipe through a cold material runner. According to the runner overturning structure, the molten material is injected into the annular reversing runner through the flow injection opening, when molten plastic enters the annular reversing runner through the flow injection opening, the flowing direction of the molten material can be correspondingly changed due to the change of the shape of a pipeline, the plastic can be more uniform in the flowing process through the change, and flaws generated due to uneven flowing are reduced.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a flow channel flipping structure. Background Technology

[0002] Runner reversal is an advanced technology in injection mold design. By reversing the runner, the gate and runner of the injection molded part can be arranged in a more flexible way, thereby optimizing the production process and improving product quality. Its function is to smoothly fill the cavity with plastic melt to obtain plastic products with clear outlines and excellent internal quality.

[0003] A flip-over flow channel, with application number CN202021876930.0, includes a male mold flow channel and a female mold flow channel. The male mold flow channel is located on the male mold side, and the female mold flow channel is located on the female mold side. One end of the male mold flow channel is connected to the nozzle flow channel, and the other end is connected to the female mold flow channel. The end of the female mold flow channel is connected to the female mold cavity. This flip-over flow channel achieves balanced flow with consistent pressure, temperature, and viscosity, solving the problems of imbalance and deformation in the mold cavity. The male mold flow channel flips at the connection point with the female mold flow channel, causing the molten material within the channel to realign. This optimizes the flow pattern and alignment of the male mold flow channel, ensuring that the side where the molten material temperature rises sharply in the male mold flow channel is located on the other side of the female mold flow channel after flipping, preventing deformation caused by frictional shear heat on a single side.

[0004] The device causes the runner to flip at the connection point with the female mold runner, causing the molten material in the runner to realign and optimizing the flow pattern and alignment of the male mold runner. However, the connection between the pipes in this device is vertical. During the runner flipping process, the molten material goes straight up and down, which will impact the pipe connection. This will not only easily damage the pipe connection, but also significantly reduce the runner pressure and affect the injection molding effect.

[0005] To address the aforementioned issues, there is an urgent need for innovative design based on the existing flow channel flipping structure. Utility Model Content

[0006] The purpose of this invention is to provide a flow channel reversing structure to solve the problem mentioned in the background art that the connection between the pipes of the device is a vertical connection, and the molten material will impact the pipe connection during the flow channel reversing process. This not only easily damages the pipe connection, but also greatly reduces the flow channel pressure and affects the injection molding effect.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a flow channel reversing structure, including an injection tube, an injection port fixedly connected to the bottom of the injection tube, and a liquid distribution tube fixedly connected to the bottom of the injection port; further comprising: an annular reversing flow channel, the annular reversing flow channel being fixedly connected to the outside of the liquid distribution tube;

[0008] Main channel, which is connected to both ends of the annular reverse flow channel; branch channel, which is perpendicularly connected to the main channel; sprue ring, which is fixedly connected to the left and right sides of the branch channel; branch pipe, which is fixedly connected to the outside of the sprue ring; mother mold cavity, which is connected to the branch pipe through the cold material flow channel.

[0009] Preferably, a first arc opening is provided between the liquid distribution tube and the annular reverse flow channel.

[0010] Preferably, a second arc opening is provided between the annular reversing flow channel and the main flow channel.

[0011] Preferably, a third arc opening is provided between the main flow channel and the branch flow channel.

[0012] Preferably, an exhaust tailpipe extends from the end of the connection between the diversion pipe and the cold material flow channel.

[0013] Preferably, the diversion pipes are distributed in four groups at equal angles to the center of the sprue ring, and the sprue ring is viewed from above as a disc-shaped structure.

[0014] Preferably, the cold material flow channel is viewed from above as a "U" shaped structure.

[0015] Preferably, the injection port is viewed as an inverted cone shape.

[0016] Compared with the prior art, the beneficial effect of this utility model is that the flow channel overturning structure is provided with:

[0017] The flow channel reversal structure injects molten material into the annular reversal flow channel through the injection port. When the molten plastic enters the annular reversal flow channel through the injection port, the flow direction of the molten material will also change accordingly due to the change in the shape of the channel. This change helps to make the plastic flow more uniform and reduce defects caused by uneven flow.

[0018] Furthermore, the molten material entering the inner side of the annular reversing flow channel flows outward through the main flow channels on both sides. When the molten material flows to the intersection between the main flow channel and the branch flow channel, the flow direction of the molten material will change. The part with a higher temperature inside the main flow channel will be flipped after entering the inner side of the branch flow channel, so that it is located outside the branch flow channel. This keeps the temperature inside and outside the molten material balanced and prevents deformation caused by frictional shear heat on one side.

[0019] Furthermore, the molten material flowing to the end of the distribution channel will enter the sprue ring. The design of the sprue ring can guide the plastic to flow out of the pipe more smoothly, reduce flow resistance, and the sprue ring can also play a buffering role, making the plastic flow out of the pipe more uniform, which helps to improve the precision and quality of the finished product.

[0020] Furthermore, the sprue ring is connected to the mother mold cavity through a cold slug channel, which has a "U" shaped structure. The design of the cold slug channel not only reduces the temperature and pressure of the molten material, protecting the mother mold cavity, but also, by changing the shape and path of the channel, the U-shaped tube can make the plastic flow more uniformly during the process, reducing uneven flow or dead corners. This helps to ensure that the plastic can fill the mold cavity smoothly and evenly, improving the precision and quality of the injection molded product.

[0021] Furthermore, an exhaust tailpipe extends from the end of the connection between the manifold and the cold slug channel. When the molten material flows, there will be some gas inside the pipe. This gas will enter the inside of the mother mold cavity and cause bubbles to form inside the mold. The exhaust tailpipe can discharge the gas from the pipe, thereby reducing the pressure inside the mold and protecting the mold from damage.

[0022] Furthermore, arc-shaped openings are provided between the distribution pipe and the annular reverse flow channel, between the annular reverse flow channel and the main flow channel, and between the main flow channel and the distribution channel. The design of these arc-shaped openings between the pipes can optimize the water flow state, reduce pressure loss, alleviate water pressure, enhance pipe flexibility, and avoid water hammer effect, thereby improving the injection molding effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the annular reversible flow channel of this utility model;

[0025] Figure 3 This is a top sectional view of the annular reversing flow channel of this utility model.

[0026] Figure 4 This is a schematic diagram of the connection structure between the main channel and the branch channel of this utility model;

[0027] Figure 5 This is a schematic diagram of the connection structure between the sprue sleeve and the diverter pipe of this utility model.

[0028] In the diagram: 1. Injection pipe; 2. Injection port; 3. Divider pipe; 301. First arc port; 4. Annular reverse flow channel; 401. Second arc port; 5. Main flow channel; 501. Third arc port; 6. Divider channel; 7. Sprue ring; 8. Divider pipe; 801. Exhaust tailpipe; 9. Cold material flow channel; 10. Mother mold cavity. Detailed Implementation

[0029] 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.

[0030] Please see Figures 1-5 This utility model provides a technical solution: a flow channel reversing structure, including: an injection pipe 1, with an injection port 2 fixedly connected to the bottom of the injection pipe 1, and a distribution pipe 3 fixedly connected to the bottom of the injection port 2; it also includes: an annular reversing flow channel 4, which is fixedly connected to the outside of the distribution pipe 3; a main flow channel 5, which is connected to both ends of the annular reversing flow channel 4; a branch flow channel 6, which is perpendicularly connected to the main flow channel 5; a sprue ring 7, which is fixedly connected to the left and right sides of the branch flow channel 6; a branch flow pipe 8, which is fixedly connected to the outside of the sprue ring 7; and a mother mold cavity 10, which is connected to the branch flow pipe 8 through a cold material flow channel 9.

[0031] A first arc opening 301 is provided between the liquid distribution pipe 3 and the annular reversing flow channel 4; a second arc opening 401 is provided between the annular reversing flow channel 4 and the main flow channel 5; a third arc opening 501 is provided between the main flow channel 5 and the distribution channel 6; an exhaust tail pipe 801 extends from the end of the connection between the distribution pipe 8 and the cold material flow channel 9; the distribution pipe 8 has four sets of distribution pipes at equal angles to the center of the nozzle ring 7, and the nozzle ring 7 is a disc-shaped structure when viewed from above; the cold material flow channel 9 is a "U"-shaped structure when viewed from above; the injection port 2 is an inverted cone-shaped structure when viewed from the front.

[0032] This structure injects molten material into the annular reversing flow channel 4 through the injection port 2. When the molten plastic enters the annular reversing flow channel 4 through the injection port 2, the flow direction of the molten material changes accordingly due to the change in the shape of the channel. This change helps to make the plastic flow more uniform during the process and reduce defects caused by uneven flow. The molten material entering the inner side of the annular reversing flow channel 4 flows outward through the main flow channels 5 on both sides. When the molten material flows to the intersection between the main flow channel 5 and the branch channel 6, the flow direction of the molten material changes, and the warmer part inside the main flow channel 5... After entering the inner side of the manifold 6, the material flips over, placing it on the outer side of the manifold 6. This ensures a uniform temperature inside and outside the molten material and prevents deformation caused by frictional shear heat on one side. The molten material flowing to the end of the manifold 6 enters the sprue ring 7. The design of the sprue ring 7 guides the plastic to flow out of the pipe more smoothly, reducing flow resistance. The sprue ring 7 also acts as a buffer, making the plastic flow out of the pipe more uniform, which helps improve the precision and quality of the finished product. The sprue ring 7 is connected to the mother mold cavity 10 through the cold slurry channel 9. The connection is made of a U-shaped cold slug channel 9. This design not only reduces the temperature and pressure of the molten material, protecting the mold cavity 10, but also, by changing the shape and path of the channel, allows for more uniform plastic flow, reducing uneven flow or dead zones. This helps ensure that the plastic fills the mold cavity 10 smoothly and evenly, improving the precision and quality of the injection molded product. An exhaust tailpipe 801 extends from the end of the connection between the manifold 8 and the cold slug channel 9, allowing for the presence of exhaust gas inside the pipe during molten material flow. Some of the gas enters the inner side of the mother mold cavity 10, which will cause air bubbles to form inside the molding mold. The gas can be discharged through the exhaust tailpipe 801, thereby reducing the pressure inside the mold and protecting the mold from damage. The distribution pipe 3 and the annular reverse flow channel 4, the annular reverse flow channel 4 and the main flow channel 5, and the main flow channel 5 and the distribution channel 6 are all provided with arc openings. The design of these arc openings between the pipes can optimize the water flow state, reduce pressure loss, alleviate water pressure, enhance the flexibility of the pipes, and avoid water hammer effect, thereby improving the injection molding effect.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] 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 flow channel inversion structure, comprising an injection tube (1), wherein an injection port (2) is fixedly connected to the bottom of the injection tube (1), and a liquid distribution tube (3) is fixedly connected to the bottom of the injection port (2). Its features are, Also includes: An annular reversing flow channel (4) is fixedly connected to the outside of the liquid separator (3); Main channel (5), which is connected to both ends of the annular reverse flow channel (4); Diversion channel (6), which is perpendicularly connected to the main channel (5); The sprue collar (7) is fixedly connected to the left and right sides of the diversion channel (6); Diverter pipe (8), which is fixedly connected to the outside of the nozzle sleeve (7); The mother mold cavity (10) is connected to the branch pipe (8) through the cold material flow channel (9).

2. The flow channel flipping structure according to claim 1, characterized in that: A first arc opening (301) is provided between the liquid distribution tube (3) and the annular reverse flow channel (4).

3. The flow channel flipping structure according to claim 1, characterized in that: A second arc opening (401) is provided between the annular reversing flow channel (4) and the main flow channel (5).

4. The flow channel flipping structure according to claim 1, characterized in that: A third arc opening (501) is provided between the main channel (5) and the branch channel (6).

5. The flow channel flipping structure according to claim 1, characterized in that: An exhaust tailpipe (801) extends from the end of the connection between the diversion pipe (8) and the cold material flow channel (9).

6. The flow channel flipping structure according to claim 1, characterized in that: The diversion pipe (8) is distributed in four groups at equal angles to the center of the nozzle ring (7), and the nozzle ring (7) is viewed from above as a disc-shaped structure.

7. The flow channel flipping structure according to claim 1, characterized in that: The cold material flow channel (9) is viewed from above as a "U" shaped structure.

8. The flow channel flipping structure according to claim 1, characterized in that: The injection port (2) is viewed as an inverted cone-shaped structure.

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