Air inlet device for physical foaming injection molding

Abstract

The utility model relates to the technical field of injection molding air inlet, in particular to an air inlet device for physical foaming injection molding, which comprises a control box, one side of the control box is connected with a connecting port, an air inlet pipe is inserted in the connecting port, a bump is arranged on the outer side of the air inlet pipe, a sliding chute is arranged in the connecting port, and the sliding chute is connected with the air inlet pipe. According to the utility model, during air intake, if nitrogen leakage occurs at the connecting part, nitrogen can be exhausted outwards through the through pipe, and when the nitrogen is exhausted, the cloth strip moves due to the flowing of airflow, so that a worker can intuitively observe the nitrogen leakage, the nitrogen leakage is prevented, and the working efficiency is improved. The utility model relates to a gas inlet device for physical foaming injection molding, which is used for solving the problems that the quantity of nitrogen entering an injection molding system is reduced and is unstable, bubble nuclei in plastic melt are insufficient in quantity or are not uniformly distributed, the sizes and the densities of product cells are not uniform, and the quality and the performance stability of products are influenced, so that the gas inlet device for physical foaming injection molding is realized.

Description

Technical Field

[0001] This utility model relates to the field of air intake technology for injection molding, specifically to an air intake device for physical foam injection molding. Background Technology

[0002] Physical foaming injection molding has become increasingly important in modern manufacturing due to its unique advantages. This process introduces physical foaming agents (such as nitrogen and carbon dioxide) into the plastic melt to form bubbles under specific conditions, thereby creating a microporous structure inside the plastic product.

[0003] Traditional air intake devices may cause nitrogen leakage at the air intake pipe connection after prolonged use, which may affect product quality. Furthermore, operators cannot visually observe whether nitrogen is leaking, making it impossible to stop the leak in time.

[0004] In view of this, this paper studies and improves the existing problems, and provides an air intake device for physical foaming injection molding. The device has a reasonable structural design, high stability, and takes into account various applications. The aim of this technology is to solve the problems and improve its practical value. Utility Model Content

[0005] In this utility model, if nitrogen leaks at the connection point during air intake, the nitrogen will be discharged outward through the pipe. During nitrogen discharge, the airflow will cause the fabric strip to move, allowing the operator to observe this directly. This prevents nitrogen leakage, which could lead to a reduction and instability in the amount of nitrogen entering the injection molding system, resulting in insufficient or uneven distribution of bubble nuclei in the plastic melt. Consequently, the product will have inconsistent bubble size and density, affecting product quality and performance stability. This invention provides an air intake device for physical foaming injection molding.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an air intake device for physical foaming injection molding, comprising a control box, a connection port connected to one side of the control box, an air intake pipe inserted into the connection port, a protrusion provided on the outside of the air intake pipe, a sliding groove provided inside the connection port, a movable block provided inside the sliding groove, an air bladder connected to one end of the connection port, a through pipe provided on the outside of the connection port, and a cloth strip connected to the outside of the through pipe.

[0007] Preferably, the connection port is fixedly connected to one side of the control box, and its inner diameter matches the outer diameter of the air intake pipe. One end of the air intake pipe is connected to the control box, and the other end is connected to the nitrogen tank. The outer side of the air intake pipe is provided with threads, and one end of the connection port is provided with a threaded groove that matches the outer thread of the air intake pipe.

[0008] Preferably, two sets of protrusions are fixedly connected to the outside of the air intake pipe, and the size of the two sets of protrusions matches the internal size of the slide groove. The end of the slide groove away from the outside extends to one side by a certain distance.

[0009] Preferably, the movable block is movably connected inside the slide groove, and the size of the movable block matches the slide groove. A push rod is fixedly connected to one end of the movable block near the inside.

[0010] Preferably, the end of the push rod away from the movable block is connected to a cylinder, the cylinder is embedded inside the connection port, and the cylinder is provided with a fixed air pressure. One end of the cylinder is fixedly connected to a connecting pipe.

[0011] Preferably, an airbag is fixedly connected to the other end of the connecting tube, with the airbag located at the end of the connecting port away from the outside, and the airbag is fixedly connected inside the connecting port.

[0012] Preferably, the tube is fixedly connected to the outside of the connection port, and extends through the connection port to the inside. The tube is located at the end of the connection port near the outside, and a cloth strip is fixedly connected to the end of the tube near the outside.

[0013] This utility model has the following beneficial effects: After connecting the air inlet pipe to the connector, if nitrogen leaks at the connection point during air intake, the nitrogen will be discharged outward through the pipe. When the nitrogen is discharged, the airflow will cause the fabric strip to move, allowing the staff to observe it directly. This prevents nitrogen leakage, which would reduce and destabilize the amount of nitrogen entering the injection molding system, resulting in insufficient or uneven distribution of bubble nuclei in the plastic melt, leading to inconsistent bubble size and density in the product, thus affecting product quality and performance stability. Attached Figure Description

[0014] Figure 1 This is one of the overall structural diagrams of an air intake device for physical foaming injection molding proposed in this utility model;

[0015] Figure 2 The second part is a structural diagram of an air intake device for physical foaming injection molding proposed in this utility model.

[0016] Figure 3 This is a partial structural diagram of an air intake device for physical foaming injection molding proposed in this utility model.

[0017] Figure 4 This is a structural diagram of the internal connection port of an air inlet device for physical foaming injection molding proposed in this utility model.

[0018] Legend:

[0019] 1. Control box; 2. Connection port; 3. Air intake pipe; 4. Protrusion; 5. Slide groove; 6. Movable block; 7. Push rod; 8. Cylinder; 9. Connecting pipe; 10. Airbag; 11. Through pipe; 12. Cloth strip. Detailed Implementation

[0020] 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.

[0021] Reference Figure 1-4 An embodiment of this utility model provides an air intake device for physical foaming injection molding, including a control box 1, a connection port 2 connected to one side of the control box 1, an air intake pipe 3 inserted inside the connection port 2, a protrusion 4 provided on the outside of the air intake pipe 3, a sliding groove 5 opened inside the connection port 2, a movable block 6 provided inside the sliding groove 5, an air bag 10 connected to one end of the connection port 2, a through pipe 11 provided on the outside of the connection port 2, and a cloth strip 12 connected to the outside of the through pipe 11.

[0022] In an optional embodiment: the connection port 2 is fixedly connected to one side of the control box 1, and the inner diameter of the connection port 2 matches the outer diameter of the air inlet pipe 3. One end of the air inlet pipe 3 is connected to the control box 1, and the other end is connected to the nitrogen tank. The outer side of the air inlet pipe 3 is provided with threads, and one end of the connection port 2 is provided with a threaded groove that matches the outer thread of the air inlet pipe 3. When in use, the nitrogen is controlled by the control box 1 and then transported through the air inlet pipe 3. The connection port 2 and the air inlet pipe 3 are fixed by being connected by threads and threaded grooves.

[0023] In an optional embodiment: two sets of protrusions 4 are fixedly connected to the outside of the air intake pipe 3. The size of the two sets of protrusions 4 matches the internal size of the slide groove 5. The end of the slide groove 5 away from the outside extends to one side for a certain distance. When connecting the air intake pipe 3 to the connection port 2, the protrusions 4 are aligned with the slide groove 5, so that the protrusions 4 enter the interior of the slide groove 5, thereby enabling the operator to quickly find the docking point. The size of the extended end of the slide groove 5 is larger than the size of the protrusions 4.

[0024] In an optional embodiment: the movable block 6 is movably connected inside the slide groove 5, and the size of the movable block 6 matches the slide groove 5. A push rod 7 is fixedly connected to one end of the movable block 6 near the inside. After the protrusion 4 enters the slide groove 5, it will contact the movable block 6. There is a certain adsorption force between the protrusion 4 and the movable block 6. As the air intake pipe 3 enters the connection port 2, the protrusion 4 will push the movable block 6 to move synchronously into the connection port 2. When the movable block 6 moves, it will drive the push rod 7 to move synchronously into the connection port 2. After the protrusion 4 moves to the end of the slide groove 5, by rotating the air intake pipe 3, the protrusion 4 enters the extension of one end of the slide groove 5, thereby locking. When the air intake pipe 3 rotates, the threads on the outside of the air intake pipe 3 will connect with the thread groove, thereby fixing the air intake pipe 3 and preventing the protrusion 4 from falling out of the slide groove 5 due to external interference during locking, which would cause nitrogen leakage.

[0025] In an optional embodiment: the end of the push rod 7 away from the movable block 6 is connected to a cylinder 8. The cylinder 8 is embedded inside the connection port 2 and has a fixed air pressure inside. One end of the cylinder 8 is fixedly connected to a connecting pipe 9. When the push rod 7 moves, it will enter the cylinder 8. Because there is air pressure inside the cylinder 8, the push rod 7 will squeeze the air pressure inside the cylinder 8 and move it to the rear end, thereby entering the connecting pipe 9.

[0026] In an optional embodiment: the other end of the connecting pipe 9 is fixedly connected to an airbag 10, which is located at the end of the connecting port 2 away from the outside and is fixedly connected inside the connecting port 2. After the air pressure enters the connecting pipe 9, it will enter the airbag 10 through the connecting pipe 9, thereby causing the airbag 10 to inflate. When the airbag 10 inflates, it will block the gap between the air inlet pipe 3 and the connecting port 2, thereby preventing nitrogen leakage.

[0027] In an optional embodiment: the through pipe 11 is fixedly connected to the outside of the connection port 2, and the through pipe 11 extends through the connection port 2 to the inside. The through pipe 11 is located at the end of the connection port 2 near the outside. A cloth strip 12 is fixedly connected to the end of the through pipe 11 near the outside. After the air inlet pipe 3 is connected to the connection port 2, if nitrogen leaks at the connection point during air intake, nitrogen will be discharged outward through the through pipe 11. When nitrogen is discharged, the flow of air will cause the cloth strip 12 to move, so that the staff can observe it directly. This prevents nitrogen leakage, which would reduce and make unstable nitrogen entering the injection molding system, resulting in insufficient number or uneven distribution of bubble nuclei in the plastic melt, leading to inconsistent bubble size and density in the product, affecting product quality and performance stability.

[0028] When the intake pipe 3 needs to be replaced or repaired, the intake pipe 3 is rotated to allow the protrusion 4 to enter the slide groove 5, thereby gradually pulling the intake pipe 3 outward. As the intake pipe 3 moves, the protrusion 4 and the movable block 6 have an adsorption force, so the movement of the intake pipe 3 will drive the movable block 6 to move synchronously through the protrusion 4. When the movable block 6 moves, it will drive the push rod 7 to gradually return to its original position, thereby achieving quick insertion and connection during use and improving the efficiency of maintenance personnel.

[0029] Working principle and process: When connecting the air intake pipe 3 to the connection port 2, the protrusion 4 is aligned with the slide groove 5, allowing the protrusion 4 to enter the slide groove 5, enabling the operator to quickly find the docking point. After the protrusion 4 enters the slide groove 5, it will contact the movable block 6. There is a certain suction force between the protrusion 4 and the movable block 6. As the air intake pipe 3 enters the connection port 2, the protrusion 4 will push the movable block 6 to move synchronously into the connection port 2. When the movable block 6 moves, it will drive the push rod 7 to move synchronously into the connection port 2. After the protrusion 4 moves to the end of the slide groove 5, the air intake pipe 3 is rotated, causing the protrusion 4 to enter the extension of one end of the slide groove 5, thereby locking it in place. When the air intake pipe 3 rotates, the threads on the outside of the air intake pipe 3 will connect with the threaded groove, thereby fixing the air intake pipe 3.

[0030] When push rod 7 moves, it enters the cylinder 8. Because there is air pressure inside cylinder 8, push rod 7 will squeeze the air pressure inside cylinder 8 and move it to the rear end, thus entering the connecting pipe 9. After the air pressure enters the connecting pipe 9, it will be transported into the airbag 10 through the connecting pipe 9, thus causing the airbag 10 to inflate. When the airbag 10 inflates, it will block the gap between the air inlet pipe 3 and the connecting port 2. After the air inlet pipe 3 is connected to the connecting port 2, if nitrogen leaks at the connection point during air intake, the nitrogen will be discharged outward through the pipe 11. When the nitrogen is discharged, the airflow will cause the cloth strip 12 to move, so that the staff can see it directly and prevent nitrogen leakage.

[0031] When the intake pipe 3 needs to be replaced or repaired, the intake pipe 3 is rotated to allow the protrusion 4 to enter the slide groove 5, thereby gradually pulling the intake pipe 3 outward. As the intake pipe 3 moves, the protrusion 4 and the movable block 6 have an adsorption force, so the movable block 6 moves synchronously through the protrusion 4. When the movable block 6 moves, it will drive the push rod 7 to gradually reset, so that it can be quickly inserted during use.

[0032] 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. A gas inlet device for physical foaming injection moulding, comprising a control box (1), characterised in that: The control box (1) has a connection port (2) on one side. An air inlet pipe (3) is inserted into the connection port (2). A protrusion (4) is provided on the outside of the air inlet pipe (3). A sliding groove (5) is opened inside the connection port (2). A movable block (6) is provided inside the sliding groove (5). An airbag (10) is connected to one end of the connection port (2). A through pipe (11) is provided on the outside of the connection port (2). A cloth strip (12) is connected to the outside of the through pipe (11).

2. A gas inlet device for physical foaming injection moulding according to claim 1, characterised in that: The connection port (2) is fixedly connected to one side of the control box (1). The inner diameter of the connection port (2) matches the outer diameter of the air inlet pipe (3). One end of the air inlet pipe (3) is connected to the control box (1), and the other end is connected to the nitrogen tank. The outer side of the air inlet pipe (3) is provided with threads, and one end of the connection port (2) is provided with a thread groove that matches the outer thread of the air inlet pipe (3).

3. A gas inlet device for physical foaming injection molding according to claim 1, characterized in that: Two sets of protrusions (4) are fixedly connected to the outside of the air intake pipe (3). The size of the two sets of protrusions (4) matches the internal size of the slide groove (5). The slide groove (5) extends a distance to one side from the end away from the outside.

4. A gas inlet device for physical foaming injection molding according to claim 1, characterized in that: The movable block (6) is movably connected inside the slide groove (5), and the size of the movable block (6) matches the slide groove (5). A push rod (7) is fixedly connected to one end of the movable block (6) near the inside.

5. A gas inlet device for physical foaming injection moulding according to claim 4, characterised in that: The push rod (7) is connected to a cylinder (8) at the end away from the movable block (6). The cylinder (8) is embedded in the connection port (2) and a fixed air pressure is provided inside the cylinder (8). A connecting pipe (9) is fixedly connected to one end of the cylinder (8).

6. An air inlet device for physical foam injection molding according to claim 5, characterized in that: The other end of the connecting tube (9) is fixedly connected to an airbag (10), which is located at the end of the connecting port (2) away from the outside, and the airbag (10) is fixedly connected inside the connecting port (2).

7. A gas inlet device for physical foaming injection molding according to claim 1, wherein: The tube (11) is fixedly connected to the outside of the connection port (2). The tube (11) extends through the connection port (2) to the inside. The tube (11) is located at the end of the connection port (2) near the outside. A cloth strip (12) is fixedly connected to the end of the tube (11) near the outside.

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