Injection molding machine for cable protection pipe production

Abstract

The utility model discloses an injection molding machine for cable protection pipe production, which comprises a feeding hopper, a melting mechanism, a cable protection pipe mould and a hydraulic system, the top end of the feeding hopper is closed, a negative pressure fan is arranged at the top end, an air suction port of the negative pressure fan is communicated with the feeding hopper, an air outlet of the negative pressure fan is communicated with the outside, and a material pipe is arranged on the outer wall of the feeding hopper. A material pipe is arranged on the feeding hopper, a hose is arranged on the material pipe, a motor is arranged at the top end of the feeding hopper, a first bevel gear is arranged at the output end of the motor, a second bevel gear is meshed above the first bevel gear, a rotating shaft is arranged at the bottom end of the second bevel gear, and the rotating shaft is rotationally connected into the feeding hopper. According to the feeding device, the negative pressure fan is arranged, negative pressure is formed in the feeding hopper in the starting process of the negative pressure fan, the plastic particles are sucked into the feeding hopper through the hose by connecting the material pipe and the hose, and therefore the feeding effect of the plastic particles is achieved, and compared with the prior art, operation is convenient, and the feeding efficiency is improved.

Description

An injection molding machine for producing cable protection pipes Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to an injection molding machine for producing cable protection pipes. Background Technology

[0002] An injection molding machine, also known as an injection molding machine or injection molding machine, is a primary molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. Injection molding machines can be classified into vertical, horizontal, and vertical-horizontal combined types according to the arrangement of the injection and clamping devices. An injection molding machine typically consists of an injection system, a mold clamping system, a hydraulic transmission system, an electrical control system, a lubrication system, a heating and cooling system, and a safety monitoring system. The injection molding machine heats the plastic, applies high pressure to the molten plastic, and injects it to fill the mold cavity.

[0003] When cable protection pipes are produced with short dimensions, complex structures, or joint components, injection molding is an ideal choice. This typically requires an injection molding machine. However, existing injection molding machines are inconvenient to operate because the plastic granules are fed into the high hopper, necessitating hoisting and manual loading. Furthermore, the plastic granules may not melt in time between the hopper and the melting chamber, leading to blockages. Therefore, a new injection molding machine for cable protection pipe production is needed to meet these requirements. Summary of the Invention

[0004] The purpose of this invention is to provide an injection molding machine for producing cable protection pipes, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an injection molding machine for producing cable protection pipes, comprising a feeding hopper, a melting mechanism, a cable protection pipe mold, and a hydraulic system. The top of the feeding hopper is closed, and a negative pressure fan is installed on the top. The air intake of the negative pressure fan is connected to the feeding hopper, and the air outlet is connected to the outside. A material pipe is installed on the outer wall of the feeding hopper, and a flexible hose is installed on the material pipe. A motor is installed on the top of the feeding hopper, and a first helical gear is installed on the output end of the motor. A second helical gear meshes above the first helical gear. A rotating shaft is installed at the bottom end of the second helical gear and is rotatably connected inside the feeding hopper. Several first blades are installed on the outer wall of the rotating shaft. A solenoid valve is installed at the bottom end of the feeding hopper.

[0006] Preferably, the flexible hose is sleeved on the material pipe and connected by a locking clamp.

[0007] Preferably, a first filter screen is provided inside the feeding hopper, and the first filter screen is arranged below the air intake of the negative pressure fan and above the material pipe.

[0008] Preferably, a second filter screen is provided inside the feeding hopper, the second filter screen is arranged below the feed pipe, and a plurality of first blades are arranged between the second filter screen and the first filter screen.

[0009] Preferably, a third helical gear meshes below the first helical gear, a connecting pipe is provided at the bottom end of the third helical gear, a connecting plate is connected to the bottom end of the connecting pipe that passes through the first filter screen, the third helical gear, the connecting pipe and the connecting plate are all rotatably connected to the rotating shaft, and a number of connecting rods are provided on the outer wall of the connecting plate, and a number of second blades are provided on the connecting rods.

[0010] Preferably, the feeding hopper is provided with a limiting frame, which is L-shaped, and the first helical gear and the second helical gear are rotatably connected to the two sides of the limiting frame, respectively.

[0011] Preferably, the first blade and the second blade are arranged in a vertically staggered manner.

[0012] The beneficial effects of this utility model are:

[0013] In this invention, the suction end of a negative pressure fan is connected to the feeding hopper, so that a negative pressure is formed in the feeding hopper during the start-up of the negative pressure fan. Through the connection of the material pipe and the hose, the hose sucks the plastic particles into the feeding hopper, thereby achieving the feeding effect of plastic particles. Compared with the prior art, it is easy to operate and improves the feeding efficiency.

[0014] In this invention, a motor drives a first helical gear to rotate, which in turn drives a second helical gear to rotate, causing the rotating shaft to drive the first blade to rotate. This crushes the plastic granules stored in the hopper, reduces the particle size of the plastic granules, and prevents blockage at the melting mechanism. Attached Figure Description

[0015] Figure 1 is a structural schematic diagram of an injection molding machine for producing cable protection pipes according to this utility model;

[0016] Figure 2 is a front cross-sectional view of the feeding hopper of an injection molding machine for producing cable protection pipes according to this utility model.

[0017] Figure 3 is an enlarged structural schematic diagram of point A in Figure 2 of an injection molding machine for producing cable protection pipes proposed in this utility model;

[0018] Figure 4 is a side view cross-sectional structural diagram of the feeding hopper of an injection molding machine for producing cable protection pipes proposed in this utility model.

[0019] In the diagram: 1. Feeding hopper; 2. Melting mechanism; 3. Cable protection pipe mold; 4. Hydraulic system; 5. Negative pressure fan; 6. Material pipe; 7. Hose; 8. Motor; 9. First helical gear; 10. Second helical gear; 11. Rotating shaft; 12. First blade; 13. Solenoid valve; 14. First filter screen; 15. Second filter screen; 16. Third helical gear; 17. Connecting pipe; 18. Connecting disc; 19. Connecting rod; 20. Second blade; 21. Limiting frame. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Referring to Figures 1-4, an injection molding machine for producing cable protection pipes includes a feeding hopper 1, a melting mechanism 2, a cable protection pipe mold 3, and a hydraulic system 4. The top of the feeding hopper 1 is closed, and a negative pressure fan 5 is installed on the top. The air intake of the negative pressure fan 5 is connected to the feeding hopper 1, and the air outlet is connected to the outside. A material pipe 6 is installed on the outer wall of the feeding hopper 1, and a flexible hose 7 is installed on the material pipe 6. A motor 8 is installed on the top of the feeding hopper 1, and a first helical gear 9 is installed on the output end of the motor 8. A second helical gear 10 meshes above the first helical gear 9. A rotating shaft 11 is installed at the bottom end of the second helical gear 10. The rotating shaft 11 is rotatably connected inside the feeding hopper 1. Several first blades 12 are installed on the outer wall of the rotating shaft 11. A solenoid valve 13 is installed at the bottom end of the feeding hopper 1.

[0022] The suction end of the negative pressure fan 5 is connected to the feeding hopper 1, so that a negative pressure is formed in the feeding hopper 1 during the start-up of the negative pressure fan 5. Through the connection of the material pipe 6 and the hose 7, the hose 7 sucks the plastic particles into the feeding hopper 1, thereby achieving the feeding effect of plastic particles. Compared with the existing technology, it is easy to operate and improves the feeding efficiency. The motor 8 drives the first helical gear 9 to rotate, and the first helical gear 9 drives the second helical gear 10 to rotate, so that the rotating shaft 11 drives the first blade 12 to rotate, thereby crushing the plastic particles stored in the feeding hopper 1, reducing the particle size of the plastic particles, and preventing blockage at the melting mechanism 2.

[0023] Specifically, in this embodiment, the hose 7 is sleeved on the material pipe 6 and connected by a locking clamp, which facilitates the replacement of the hose 7.

[0024] Specifically, in this embodiment, a first filter screen 14 is provided in the feeding hopper 1. The first filter screen 14 is arranged below the air intake of the negative pressure fan 5 and above the material pipe 6 to provide a shield for the plastic particles, while ensuring the flow of gas and preventing excessive accumulation of plastic particles in the feeding hopper 1, which would cause the plastic particles to be discharged from the negative pressure fan 5 to the outside.

[0025] Specifically, in this embodiment, a second filter screen 15 is provided inside the feeding hopper 1. The second filter screen 15 is arranged below the material pipe 6, and several first blades 12 are arranged between the second filter screen 15 and the first filter screen 14 to provide bottom support for the plastic particles in the feeding hopper 1, so that after the plastic particles are crushed to the required particle size, they fall from the holes of the second filter screen 15 to the bottom outlet of the feeding hopper 1.

[0026] Specifically, in this embodiment, a third helical gear 16 meshes below the first helical gear 9. A connecting pipe 17 is provided at the bottom end of the third helical gear 16. A connecting plate 18 is connected to the bottom end of the connecting pipe 17, which passes through the first filter screen 14. The third helical gear 16, the connecting pipe 17, and the connecting plate 18 are all rotatably connected to the rotating shaft 11. Several connecting rods 19 are provided on the outer wall of the connecting plate 18. Several second blades 20 are provided on the connecting rods 19. When the first helical gear 9 drives the second helical gear 10 to mesh and rotate, the first helical gear 9 simultaneously drives the third helical gear 16 to mesh and rotate. Since the third helical gear 16 and the second helical gear 10 are respectively arranged above and below the first helical gear 9, the rotation direction of the third helical gear 16 is opposite to that of the second helical gear 10. Through the connection of the connecting pipe 17, the connecting plate 18, and the connecting rods 19, the second blades 20 produce a rotation effect opposite to that of the first blades 12, which further improves the crushing efficiency of plastic particles in the feeding hopper 1.

[0027] Specifically, in this embodiment, a limiting frame 21 is provided on the feeding hopper 1. The limiting frame 21 is L-shaped, and the first helical gear 9 and the second helical gear 10 are rotatably connected to the two sides of the limiting frame 21, which improves the meshing effect between the first helical gear 9, the second helical gear 10 and the third helical gear 16.

[0028] Specifically, in this embodiment, the first blade 12 and the second blade 20 are arranged in a vertically staggered manner to prevent collisions that occur when the first blade 12 and the second blade 20 rotate in opposite directions.

[0029] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An injection molding machine for producing cable protection pipes, comprising a feeding hopper (1), a melting mechanism (2), a cable protection pipe mold (3), and a hydraulic system (4), characterized in that: The top of the feeding hopper (1) is closed, and a negative pressure fan (5) is provided on the top. The air intake of the negative pressure fan (5) is connected to the feeding hopper (1), and the air outlet is connected to the outside. A material pipe (6) is provided on the outer wall of the feeding hopper (1), and a flexible hose (7) is provided on the material pipe (6). A motor (8) is provided on the top of the feeding hopper (1). A first helical gear (9) is provided on the output end of the motor (8). A second helical gear (10) meshes above the first helical gear (9). A rotating shaft (11) is provided on the bottom end of the second helical gear (10). The rotating shaft (11) is rotatably connected inside the feeding hopper (1). Several first blades (12) are provided on the outer wall of the rotating shaft (11). A solenoid valve (13) is provided on the bottom end of the feeding hopper (1).

2. The injection molding machine for producing cable protection pipes according to claim 1, characterized in that: The hose (7) is fitted onto the material pipe (6) and connected by a locking clamp.

3. The injection molding machine for producing cable protection pipes according to claim 1, characterized in that: The feeding hopper (1) is equipped with a first filter screen (14), which is arranged below the air intake of the negative pressure fan (5) and above the material pipe (6).

4. The injection molding machine for producing cable protection pipes according to claim 1, characterized in that: The feeding hopper (1) is provided with a second filter screen (15), which is arranged below the feed pipe (6), and a number of first blades (12) are arranged between the second filter screen (15) and the first filter screen (14).

5. The injection molding machine for producing cable protection pipes according to claim 1, characterized in that: A third helical gear (16) meshes below the first helical gear (9). A connecting pipe (17) is provided at the bottom end of the third helical gear (16). A connecting plate (18) is connected to the bottom end of the connecting pipe (17) that passes through the first filter screen (14). The third helical gear (16), the connecting pipe (17) and the connecting plate (18) are all rotatably connected to the rotating shaft (11). Several connecting rods (19) are provided on the outer wall of the connecting plate (18). Several second blades (20) are provided on the connecting rods (19).

6. The injection molding machine for producing cable protection pipes according to claim 1, characterized in that: The feeding hopper (1) is provided with a limiting frame (21), which is L-shaped. The first helical gear (9) and the second helical gear (10) are rotatably connected to the two sides of the limiting frame (21).

7. The injection molding machine for producing cable protection pipes according to claim 1, characterized in that: The first blade (12) and the second blade (20) are arranged in a vertically staggered manner.

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