Anti-overflow type hot runner injection nozzle based on port sealing

Abstract

The utility model discloses an anti-overflow type hot runner injection nozzle based on port sealing, which comprises a runner column body, a liquid inlet runner is arranged on the lower surface of the runner column body, a mounting cavity is arranged in the runner column body, a discharge opening is arranged on the upper surface of the runner column body, an injection nozzle body is arranged in the mounting cavity, and the injection nozzle body is arranged in the discharge opening. And the upper end of the injection nozzle body is fixedly connected with a liquid outlet nozzle. The anti-overflow type hot runner injection nozzle based on port closing is provided with a limiting groove and a positioning clamping block, so that when the device works, raw materials are guided in through a liquid inlet runner, the injection nozzle body is pushed to slide through the raw materials, a first pressing surface and a first limiting surface are conveniently separated, and the raw materials are conveniently guided into a communicating runner from a guide runner; and due to sliding of the injection nozzle body, the injection nozzle body drives the liquid outlet nozzle to extend out of the flow channel column body in a sliding manner, so that the liquid outlet flow channel is exposed, and the raw materials can be conveniently guided out.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding processing, and particularly relates to an anti-overflow hot runner injection nozzle based on port closing. Background Technique

[0002] The hot runner is an advanced technical system in an injection mold. During the injection molding process, plastic particles are conveyed to the hot runner system by the screw of the injection molding machine. Under the heating of the hot runner plate and the hot nozzle, the plastic particles are melted into a liquid state. Then, the liquid plastic is injected into the cavity of the mold through the runner and the hot nozzle of the hot runner system to complete the injection molding process. Throughout the process, the hot runner system always maintains the molten state of the plastic, avoiding the cooling and solidification of the plastic in the runner in the traditional injection molding process, thereby improving the injection molding efficiency and product quality. The hot runner system mainly consists of a hot nozzle, a hot runner plate, a temperature controller, etc. The hot nozzle is directly in contact with the cavity of the mold and injects the molten plastic into the cavity. There are various types of hot nozzles, such as open hot nozzles, needle valve hot nozzles, etc. Different types of hot nozzles are suitable for different injection molding processes and product requirements.

[0003] When the existing hot runner injection nozzle is in use, the plastic melt is in a molten state during the injection process and has a certain fluidity. At this time, the plastic melt used to form the workpiece and the plastic melt remaining in the injection nozzle body are still connected due to the continuity of the flow. It is necessary to wait until the melt at the injection port cools and solidifies before separating the workpiece and the plastic melt remaining in the runner column. However, this requires a long cooling time, reducing the efficiency of continuous processing. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an anti-overflow hot runner injection nozzle based on port closing, so as to solve the problem that it is necessary to wait until the melt at the injection port cools and solidifies before separating the workpiece and the plastic melt remaining in the runner column, but this requires a long cooling time, reducing the efficiency of continuous processing as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An anti-overflow hot runner injection nozzle based on port closing, including a runner column body, an inlet flow channel is opened on its lower surface, an installation cavity is opened inside the runner column body, an outlet opening is opened on the upper surface of the runner column body, an injection nozzle body is installed in the installation cavity, an outlet nozzle is fixedly connected to the upper end of the injection nozzle body, limiting grooves are opened on both side surfaces of the injection nozzle body, two positioning blocks are fixedly connected to the inner wall of the installation cavity, two guiding flow channels are opened on the side surface of the lower end of the injection nozzle body, a communicating flow channel is opened inside the injection nozzle body, and an outlet flow channel is opened on the upper side surface of the outlet nozzle.

[0006] Preferably, the lower end of the flow channel cylinder is designed as a cylinder, and the upper end of the flow channel cylinder is designed as a frustum of a cone. The upper end of the liquid inlet flow channel is communicated with the lower end of the installation cavity, and the upper end of the installation cavity is communicated with the lower end of the discharge opening.

[0007] With the above technical solution, the raw material can flow conveniently through the upper end of the liquid inlet flow channel being communicated with the lower end of the installation cavity and the upper end of the installation cavity being communicated with the lower end of the discharge opening.

[0008] Preferably, the two limiting grooves are symmetrically arranged about the midline of the flow channel cylinder, and the two positioning blocks are symmetrically arranged about the midline of the flow channel cylinder. The positioning blocks are arranged corresponding to the limiting grooves, and the positioning blocks and the limiting grooves form a sliding connection. A spring is connected between the lower surface of the positioning block and the bottom surface of the limiting groove.

[0009] With the above technical solution, a spring is connected between the limiting groove and the positioning block, which is convenient for driving the injection nozzle body to slide and reset.

[0010] Preferably, the installation cavity includes a first pressing surface and a second pressing surface, and the injection nozzle body includes a first limiting surface and a second limiting surface.

[0011] With the above technical solution, the first pressing surface and the second pressing surface are respectively attached to the first limiting surface and the second limiting surface.

[0012] Preferably, the first pressing surface is located on the inner wall of the lower end of the installation cavity and is designed to be inclined. The second pressing surface is located on the inner wall of the upper end of the installation cavity. The first limiting surface is located on the outer surface of the injection nozzle body at the end facing the discharge opening, and the second limiting surface is located on the outer surface of the injection nozzle body at the end facing the liquid inlet flow channel. The angles of inclination of the first limiting surface and the second limiting surface respectively correspond to those of the first pressing surface and the second pressing surface.

[0013] With the above technical solution, the injection nozzle body drives the first limiting surface and the second limiting surface to move, so as to be attached to the first pressing surface and the second pressing surface.

[0014] Preferably, both ends of the guiding flow channel respectively penetrate through the first limiting surface and communicate with the flow channel, and the two guiding flow channels are symmetrically arranged about the midline of the communicating flow channel.

[0015] With the above technical solution, the guiding flow channel is convenient for guiding the raw material into the communicating flow channel.

[0016] Preferably, the liquid outlet flow channel is designed in an inverted Y shape. The lower end of the liquid outlet flow channel is communicated with the upper end of the communicating flow channel, and the length of the side surface at the upper end of the liquid outlet flow channel is less than the length of the discharge opening.

[0017] With the above technical solution, the raw material is guided to the liquid outlet channel through the connecting channel, and the inclined design of the liquid outlet channel discharges the raw material to reduce splashing.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: This anti-overflow hot runner injection nozzle based on port closure:

[0019] 1. A limit groove and a positioning block are provided. When the device works, the raw material is introduced through the liquid inlet channel, and the injection nozzle body is pushed to slide by the raw material, which facilitates the separation of the first pressing surface and the first limiting surface, and facilitates the raw material to be introduced into the connecting channel from the guiding channel. The connecting channel guides the raw material to the liquid outlet channel. Due to the sliding of the injection nozzle body, the injection nozzle body drives the liquid outlet nozzle to slide out of the channel cylinder, thereby exposing the liquid outlet channel, which is convenient for discharging the raw material. When the raw material is no longer discharged, the spring between the limit groove and the positioning block facilitates driving the injection nozzle body to slide and contract, so that the liquid outlet nozzle is received in the discharge opening, which is convenient for quickly separating the workpiece and the plastic melt remaining in the channel cylinder;

[0020] 2. A guiding channel and a first pressing surface are provided. When the device does not work, the injection nozzle body is pulled by the spring between the limit groove and the positioning block, so that the first pressing surface abuts against the first limiting surface, the guiding channel is closed to block the inflow of the raw material, and at the same time, the inner wall of the discharge opening receives the liquid outlet nozzle, which is convenient for automatically separating the raw material and improves the practicability of the device;

[0021] 3. A connecting channel and a liquid outlet channel are provided. When the device works, the raw material is guided and discharged through the liquid outlet channel. The inclined design at the upper end of the liquid outlet channel ensures the pressure during discharging, and at the same time, the material will not splash due to direct spraying of the raw material, which improves the quality of product molding, is beneficial to increasing the service life of the mold, and improves the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the connection between the channel cylinder and the discharge opening of the present utility model;

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the connection between the channel cylinder and the liquid inlet channel of the present utility model;

[0024] Figure 3 It is a three-dimensional structural schematic diagram of the connection between the channel cylinder and the injection nozzle body of the present utility model;

[0025] Figure 4 It is a three-dimensional structural schematic diagram of the connection between the installation cavity and the discharge opening of the present utility model;

[0026] Figure 5 It is a three-dimensional structural schematic diagram of the connection between the injection nozzle body and the limit groove of the present utility model;

[0027] Figure 6 This is a schematic three-dimensional structure diagram of the connection between the communication channel and the liquid outlet channel of the present utility model.

[0028] In the figure: 1, channel cylinder; 2, liquid inlet channel; 3, installation cavity; 4, discharge opening; 5, injection nozzle body; 6, liquid outlet nozzle; 7, limiting groove; 8, positioning block; 9, first pressing surface; 10, first limiting surface; 11, second pressing surface; 12, second limiting surface; 13, guiding channel; 14, communication channel; 15, liquid outlet channel. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Please refer to Figure 1-6 , the present utility model provides a technical solution: an anti-overflow hot runner injection nozzle based on port closure, including a channel cylinder 1, a liquid inlet channel 2, an installation cavity 3, a discharge opening 4, an injection nozzle body 5, a liquid outlet nozzle 6, a limiting groove 7, a positioning block 8, a first pressing surface 9, a first limiting surface 10, a second pressing surface 11, a second limiting surface 12, a guiding channel 13, a communication channel 14 and a liquid outlet channel 15. The lower surface of the channel cylinder 1 is provided with a liquid inlet channel 2, and an installation cavity 3 is provided inside the channel cylinder 1. The lower end of the channel cylinder 1 is designed as a cylinder, and the upper end of the channel cylinder 1 is designed as a frustum. The upper end of the liquid inlet channel 2 is communicated with the lower end of the installation cavity 3, and the upper end of the installation cavity 3 is communicated with the lower end of the discharge opening 4. When using this device, first, the injection nozzle body 5 is pushed to contract by the spring between the limiting groove 7 and the positioning block 8, so that the discharge opening 4 houses the liquid outlet nozzle 6, which is convenient for reducing the entry of external impurities into the channel cylinder 1 and ensuring the quality during subsequent processing.

[0031] The upper surface of the channel cylinder 1 is provided with a discharge opening 4, and an injection nozzle body 5 is installed in the installation cavity 3. Two limiting grooves 7 are symmetrically arranged about the midline of the channel cylinder 1, and two positioning blocks 8 are symmetrically arranged about the midline of the channel cylinder 1. The positioning block 8 is correspondingly arranged with the limiting groove 7, and the positioning block 8 and the limiting groove 7 form a sliding connection. A spring is connected between the lower surface of the positioning block 8 and the bottom surface of the limiting groove 7. During operation, the raw material is introduced through the liquid inlet channel 2, so that the raw material pushes the injection nozzle body 5 to slide, which is convenient for the injection nozzle body 5 to drive the separation of the first limiting surface 10 and the first pressing surface 9, thereby exposing the guiding channel 13.

[0032] The upper end of the injection nozzle body 5 is fixedly connected with a liquid outlet nozzle 6. Limiting grooves 7 are formed on both side surfaces of the injection nozzle body 5. The installation cavity 3 includes a first pressing surface 9 and a second pressing surface 11. The injection nozzle body 5 includes a first limiting surface 10 and a second limiting surface 12. The first pressing surface 9 is located on the lower inner wall of the installation cavity 3 and is inclined. The second pressing surface 11 is located on the upper inner wall of the installation cavity 3. The first limiting surface 10 is located on the outer surface of the injection nozzle body 5 at one end facing the discharge opening 4. The second limiting surface 12 is located on the outer surface of the injection nozzle body 5 at one end facing the liquid inlet channel 2. The inclination angles of the first limiting surface 10 and the second limiting surface 12 correspond to the first pressing surface 9 and the second pressing surface 11 respectively. While the injection nozzle body 5 slides, the injection nozzle body 5 drives the liquid outlet nozzle 6 to extend out of the discharge opening 4, facilitating the exposure of the liquid outlet channel 15. At this time, the raw material enters the guiding channel 13 and flows into the connecting channel 14, and finally the raw material is discharged through the liquid outlet channel 15. Through the inclined design of the liquid outlet channel 15, it is convenient to ensure the discharging pressure, prevent the raw material from spraying directly and splashing the material, improve the processing quality of the subsequent product, reduce the wear of the mold and extend its service life.

[0033] Two positioning blocks 8 are fixedly connected to the inner wall of the installation cavity 3. Two guiding channels 13 are formed on the side surface at the lower end of the injection nozzle body 5. A connecting channel 14 is formed inside the injection nozzle body 5. A liquid outlet channel 15 is formed on the upper side surface of the liquid outlet nozzle 6. Both ends of the guiding channel 13 penetrate through the first limiting surface 10 and the connecting channel 14 respectively. The two guiding channels 13 are symmetrically arranged about the midline of the connecting channel 14. The liquid outlet channel 15 is designed in an inverted Y shape. The lower end of the liquid outlet channel 15 is connected to the upper end of the connecting channel 14. The length of the upper side surface of the liquid outlet channel 15 is less than the length of the discharge opening 4. After the raw material feeding is completed, since the raw material no longer pushes the injection nozzle body 5, the spring between the limiting groove 7 and the positioning block 8 pulls the injection nozzle body 5 to reset, facilitating the fitting of the first pressing surface 9 and the first limiting surface 10 to prevent the guiding channel 13 from flowing the raw material. At the same time, the injection nozzle body 5 drives the liquid outlet nozzle 6 to retract into the discharge opening 4, facilitating the shielding of the liquid outlet channel 15, thereby automatically and quickly separating the workpiece and the plastic melt remaining in the runner column 1, improving the processing efficiency.

[0034] Working principle: When using the overflow-proof hot runner injection nozzle based on port closure, first, the raw material is introduced through the liquid inlet channel 2 to push the injection nozzle body 5 to slide, so that the first limiting surface 10 is separated from the first pressing surface 9, facilitating the raw material to flow into the guiding channel 13. The sliding of the injection nozzle body 5 drives the liquid outlet nozzle 6 to extend out of the discharging opening 4. Subsequently, the raw material is discharged from the liquid outlet channel 15 through the connecting channel 14, thereby preventing the splashing of materials. When not working, the spring between the limiting groove 7 and the positioning block 8 pulls the injection nozzle body 5 to reset, so that the liquid outlet nozzle 6 retracts into the discharging opening 4 to separate the raw material, increasing the overall practicability.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-overflow hot runner injection nozzle based on port closure, comprising a runner cylinder (1), and a liquid inlet runner (2) is provided on its lower surface, and it is characterized in that: An installation cavity (3) is formed inside the flow channel cylinder (1). An outlet opening (4) is formed on the upper surface of the flow channel cylinder (1). An injection nozzle body (5) is installed in the installation cavity (3). A liquid outlet nozzle (6) is fixedly connected to the upper end of the injection nozzle body (5). Limiting grooves (7) are formed on both side surfaces of the injection nozzle body (5). Two positioning blocks (8) are fixedly connected to the inner wall of the installation cavity (3). Two guiding channels (13) are formed on the side surface of the lower end of the injection nozzle body (5). A communicating channel (14) is formed inside the injection nozzle body (5). A liquid outlet channel (15) is formed on the upper end side surface of the liquid outlet nozzle (6).

2. The anti-overflow hot runner injection nozzle based on port closure according to claim 1, characterized in that: The lower end of the flow channel cylinder (1) is designed as a cylinder, and the upper end of the flow channel cylinder (1) is designed as a frustum. The upper end of the liquid inlet channel (2) is communicated with the lower end of the installation cavity (3). The upper end of the installation cavity (3) is communicated with the lower end of the outlet opening (4).

3. The anti-overflow hot runner injection nozzle based on port closure according to claim 1, wherein: The two limiting grooves (7) are symmetrically arranged with respect to the midline of the flow channel cylinder (1). The two positioning blocks (8) are symmetrically arranged with respect to the midline of the flow channel cylinder (1). The positioning blocks (8) are arranged corresponding to the limiting grooves (7), and the positioning blocks (8) and the limiting grooves (7) form a sliding connection. A spring is connected between the lower surface of the positioning block (8) and the bottom surface of the limiting groove (7).

4. The anti-overflow hot runner injection nozzle based on port closure according to claim 1, characterized in that: The installation cavity (3) includes a first pressing surface (9) and a second pressing surface (11). The injection nozzle body (5) includes a first limiting surface (10) and a second limiting surface (12).

5. The anti-overflow hot runner injection nozzle based on port closure according to claim 4, characterized in that: The first pressing surface (9) is located on the lower inner wall of the installation cavity (3), and the first pressing surface (9) is designed to be inclined. The second pressing surface (11) is located on the upper inner wall of the installation cavity (3). The first limiting surface (10) is located on the outer surface of the injection nozzle body (5) at the end facing the outlet opening (4). The second limiting surface (12) is located on the outer surface of the injection nozzle body (5) at the end facing the liquid inlet channel (2). The inclination angles of the first limiting surface (10) and the second limiting surface (12) respectively correspond to the first pressing surface (9) and the second pressing surface (11).

6. The anti-overflow hot runner injection nozzle based on port closure according to claim 1, characterized in that: Both ends of the guiding channel (13) penetrate through the first limiting surface (10) and the communicating channel (14) respectively. The two guiding channels (13) are symmetrically arranged with respect to the midline of the communicating channel (14).

7. A spill - proof hot runner injection nozzle based on port closure according to claim 1, characterized in that: The liquid outlet channel (15) is designed as an inverted Y shape. The lower end of the liquid outlet channel (15) is communicated with the upper end of the communicating channel (14). The length of the upper end side surface of the liquid outlet channel (15) is less than the length of the outlet opening (4).

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