Hot runner device for compact small injection molding machine

Abstract

The utility model relates to the technical field of hot runner and discloses a hot runner device of compact small injection molding machine, which comprises a hot runner device body, a liquid inlet pipeline arranged at the middle position of the hot runner device body, four shunt pipelines fixedly installed on the outer surface of the liquid inlet pipeline, first heating wires, second heating wires and third heating wires arranged on the outer surfaces of the liquid inlet pipeline, the shunt pipelines and the liquid outlet pipelines, and thus the uneven heating of the solution can be prevented, the flow of the solution is balanced, the spacing between the four liquid outlet pipelines is small, third heat insulation pipes are installed on the four liquid outlet pipelines, the third heat insulation pipes are double-layered, and thus the temperature of the liquid outlet pipelines in the hot runner device body can be prevented from affecting the solution in the surrounding liquid outlet pipelines, and the uneven heating of the solution can be prevented.

Description

Technical Field

[0001] This utility model relates to the field of hot runner technology, specifically a hot runner device for a compact small injection molding machine. Background Technology

[0002] Hot runner systems are components installed on injection molds, and they are characterized by saving raw materials and reducing costs.

[0003] Because the spacing between the hot runner pipes on a compact injection molding machine is small, when the solution in the hot runner is heated to maintain a balanced flow, the heating wire in the hot runner may affect the temperature of the solution in the surrounding pipes, resulting in an uneven temperature distribution between the pipes. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a hot runner device for a compact small injection molding machine. This addresses the problem mentioned in the background art: because the spacing between the hot runner pipes in a compact small injection molding machine is small, when the solution in the hot runner is heated to maintain a balanced flow, the heating wire in the hot runner may affect the temperature of the solution in the surrounding pipes, thus causing an uneven temperature distribution between the pipes.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hot runner device for a compact small injection molding machine, comprising a hot runner device body, an inlet pipe disposed in the middle of the hot runner device body, four branch pipes fixedly installed on the outer surface of the inlet pipe, the four branch pipes being arranged in a circumferential array on the surface of the inlet pipe, an outlet pipe fixedly installed at the end of each of the four branch pipes, a nozzle fixedly installed at the bottom of the outlet pipe, the inlet pipe, the branch pipes and the outlet pipes being interconnected, a heating tube disposed inside the inlet pipe, a first heat insulation tube fixedly installed on the outer end surface of the inlet pipe, and a first heating wire fixedly installed inside the first heat insulation tube.

[0006] By adopting the above technical solution, a first heating wire, a second heating wire, and a third heating wire are all installed on the outer surface of the inlet pipe, the diversion pipe, and the outlet pipe. This can prevent uneven heating of the solution and thus prevent uneven flow of the solution. Furthermore, since the distance between the four outlet pipes is small, a third heat insulation pipe is installed on each of the four outlet pipes. The third heat insulation pipe is arranged in a double layer. This can effectively prevent the temperature of the outlet pipe inside the hot runner device from affecting the solution in the surrounding outlet pipes and thus preventing uneven flow of the solution.

[0007] Preferably, a second heat insulation pipe is fixedly installed on each of the four diversion pipes installed on the outer surface of the liquid inlet pipe, and a second heating wire is fixedly installed inside the second heat insulation pipe. A third heat insulation pipe is fixedly installed on the liquid outlet pipe at the outer end of the diversion pipe, and a third heating wire is fixedly installed inside the second heat insulation pipe.

[0008] Using the above technical solution, the solution enters the distribution pipe through the inlet pipe and then enters the outlet pipe. Finally, the solution is sent into the mold through the nozzle set at the bottom. Since the outer surfaces of the inlet pipe, the distribution pipe and the outlet pipe are all equipped with a first heating wire, a second heating wire and a third heating wire, the solution can be heated well during the process of entering the inlet pipe and being sprayed out of the nozzle.

[0009] Preferably, each of the liquid outlet pipes has a through hole at its top, through which a heating rod passes, and a heater is fixedly installed at the top of the heating rod.

[0010] Using the above technical solution, a heating rod installed at the bottom of the heater penetrates through the through hole of the liquid outlet pipe, thereby extending the heating rod into the interior of the liquid outlet pipe to heat the solution inside.

[0011] Preferably, the first heat insulation pipe, the second heat insulation pipe and the third heat insulation pipe are all made of aluminum-zinc alloy.

[0012] Using the above technical solution, the first, second, and third heat insulation pipes installed on the outer surfaces of the liquid inlet pipe, the diversion pipe, and the liquid outlet pipe are all made of aluminum-zinc alloy. Therefore, this can effectively improve the thermal conductivity of the main body of the hot runner device, thereby effectively preventing the hot runner device from having low thermal conductivity.

[0013] Preferably, the four branch pipes installed on the outer surface of the inlet pipe are all located inside the hot runner device body, and the outlet pipes installed on the outer end surface of the branch pipes all extend out from inside the hot runner device body.

[0014] With the above technical solution, the four diversion pipes installed on the outer surface of the liquid inlet pipe are all located inside the hot runner device body, which can effectively protect the diversion pipes.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. The hot runner device of this compact small injection molding machine has a first heating wire, a second heating wire, and a third heating wire installed on the outer surface of the inlet pipe, the branch pipe, and the outlet pipe. This can prevent uneven heating of the solution and thus prevent uneven flow of the solution. Furthermore, since the distance between the four outlet pipes is small, a third heat insulation pipe is installed on each of the four outlet pipes. The third heat insulation pipe is arranged in a double layer. This can effectively prevent the temperature of the outlet pipe inside the hot runner device from affecting the solution in the surrounding outlet pipes and causing uneven flow of the solution.

[0016] 2. The hot runner system of this compact small injection molding machine uses aluminum-zinc alloy for the first, second, and third heat insulation pipes installed on the outer surfaces of the inlet pipe, the branch pipe, and the outlet pipe. This effectively improves the thermal conductivity of the hot runner system and prevents low thermal conductivity. Furthermore, the four branch pipes installed on the outer surface of the inlet pipe are located inside the hot runner system, thus providing good protection for the branch pipes. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the hot runner device of the compact small injection molding machine of this utility model; Figure 2 This is a schematic diagram of the diversion pipe and its related structures of this utility model; Figure 3 This is a schematic diagram of the internal structure of the hot runner device of the compact small injection molding machine of this utility model; Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0018] In the diagram: 1. Main body of the hot runner device; 2. Inlet pipe; 3. Diversion pipe; 4. Outlet pipe; 5. Nozzle; 6. Heating tube; 7. First heat insulation tube; 8. First heating wire; 9. Second heat insulation tube; 10. Second heating wire; 11. Third heat insulation tube; 12. Third heating wire; 13. Through hole; 14. Heater. Detailed Implementation

[0019] 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.

[0020] Example 1: Referring to Figures 1-4, a hot runner device for a compact small injection molding machine is described. The main body 1 of the hot runner device has an inlet pipe 2 located in the middle. Four branch pipes 3 are fixedly installed on the outer surface of the inlet pipe 2, arranged in a circular array. An outlet pipe 4 is fixedly installed at the end of each of the four branch pipes 3, and a nozzle 5 is fixedly installed at the bottom of the outlet pipe 4. The inlet pipe 2, branch pipes 3, and outlet pipes 4 are all interconnected. A heating element 6 is installed inside the inlet pipe 2. A first heat insulation pipe 7 is fixedly installed, and a first heating wire 8 is fixedly installed inside the first heat insulation pipe 7. A second heat insulation pipe 9 is fixedly installed on each of the four diversion pipes 3 installed on the outer surface of the liquid inlet pipe 2. A second heating wire 10 is fixedly installed inside the second heat insulation pipe 9. A third heat insulation pipe 11 is fixedly installed on the liquid outlet pipe 4 at the outer end of the diversion pipe 3. A third heating wire 12 is fixedly installed inside the second heat insulation pipe 9. A through hole 13 is opened at the top of each liquid outlet pipe 4. A heating rod passes through the through hole 13. A heater 14 is fixedly installed at the top of the heating rod.

[0021] Working principle: When the solution enters the inlet pipe 2 and then the diversion pipe 3, it enters the outlet pipe 4 and is finally delivered into the mold through the nozzle 5 at its bottom. Since the outer surfaces of the inlet pipe 2, diversion pipe 3, and outlet pipe 4 are all equipped with a first heating wire 8, a second heating wire 10, and a third heating wire 12, the solution is effectively heated during its entry into the inlet pipe 2 and its ejection from the nozzle 5. This effectively prevents uneven flow of the solution. Furthermore, because the main body 1 of this hot runner device is designed for compact small injection molding machines, the spacing between the four outlet pipes 4 is relatively small. Therefore, each of the four outlet pipes 4 is equipped with a third heat insulation pipe 11, which is double-layered. This effectively prevents the temperature of the outlet pipes 4 within the hot runner device from affecting the solution in the surrounding outlet pipes 4, thus preventing uneven flow.

[0022] Example 2: Referring to Figures 1-4, a hot runner device for a compact small injection molding machine is described. The first heat insulation pipe 7, the second heat insulation pipe 9, and the third heat insulation pipe 11 are all made of aluminum-zinc alloy. The four branch pipes 3 installed on the outer surface of the liquid inlet pipe 2 are all located inside the main body 1 of the hot runner device. The liquid outlet pipes 4 installed on the outer surface of the branch pipes 3 all extend out from inside the main body 1 of the hot runner device.

[0023] Working principle: The first heat insulation pipe 7, the second heat insulation pipe 9, and the third heat insulation pipe 11 installed on the outer surface of the liquid inlet pipe 2, the diversion pipe 3, and the liquid outlet pipe 4 are all made of aluminum-zinc alloy. Therefore, this can effectively improve the thermal conductivity of the hot runner device body 1, thereby effectively preventing the hot runner device body 1 from having low thermal conductivity. Furthermore, the four diversion pipes 3 installed on the outer surface of the liquid inlet pipe 2 are all located inside the hot runner device body 1, thus providing good protection for the diversion pipes 3.

[0024] 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 hot runner system for a compact small injection molding machine, comprising a hot runner system body (1), characterized in that: The main body (1) of the hot runner device has an inlet pipe (2) in the middle. Four branch pipes (3) are fixedly installed on the outer surface of the inlet pipe (2). The four branch pipes (3) are arranged in a circular array on the surface of the inlet pipe (2). An outlet pipe (4) is fixedly installed at the end of each of the four branch pipes (3). A nozzle (5) is fixedly installed at the bottom of the outlet pipe (4). The inlet pipe (2), branch pipes (3) and outlet pipe (4) are all connected. A heating tube (6) is provided inside the inlet pipe (2). A first heat insulation tube (7) is fixedly installed on the outer surface of the inlet pipe (2). A first heating wire (8) is fixedly installed inside the first heat insulation tube (7).

2. The hot runner device for a compact small injection molding machine according to claim 1, characterized in that: The four diversion pipes (3) installed on the outer surface of the liquid inlet pipe (2) are each fixedly equipped with a second heat insulation pipe (9), and a second heating wire (10) is fixedly installed inside the second heat insulation pipe (9). The liquid outlet pipe (4) at the outer end of the diversion pipe (3) is fixedly equipped with a third heat insulation pipe (11), and a third heating wire (12) is fixedly installed inside the second heat insulation pipe (9).

3. The hot runner device for a compact small injection molding machine according to claim 1, characterized in that: Each of the liquid outlet pipes (4) has a through hole (13) at its top end. A heating rod passes through the through hole (13), and a heater (14) is fixedly installed at the top end of the heating rod.

4. The hot runner device for a compact small injection molding machine according to claim 1, characterized in that: The first heat insulation pipe (7), the second heat insulation pipe (9) and the third heat insulation pipe (11) are all made of aluminum-zinc alloy.

5. The hot runner device for a compact small injection molding machine according to claim 1, characterized in that: The four branch pipes (3) installed on the outer surface of the liquid inlet pipe (2) are all located inside the hot runner device body (1), and the liquid outlet pipes (4) installed on the outer surface of the branch pipes (3) all extend out from inside the hot runner device body (1).

Images