Hot runner mold

Abstract

The utility model provides a hot runner mold which comprises an I-shaped splitter plate, a plurality of through flow holes are symmetrically formed in the two sides of the splitter plate, an air cylinder is arranged at the top of the splitter plate, valve sleeves are installed at the positions, located at the flow holes, of the top end of the splitter plate, and hot nozzle bases are installed at the positions, located at the flow holes, of the bottom end of the splitter plate. A hot nozzle body is installed in the hot nozzle base in a penetrating and penetrating mode, a plurality of heating grooves are symmetrically formed in the top and the bottom of the splitter plate, one heating groove is formed in the position of an injection nozzle, heating pipes are installed in the heating grooves, the splitter plate is heated through the multiple heating grooves, and plastic at the position of the injection nozzle is heated through the heating pipes in one heating groove. And the flow holes which are not distributed in the heating groove are also distributed in the side surface of the heating groove, so that the material can be fully and uniformly heated in the manner, the material always keeps good fluidity in the first runner and the second runner, and the influence on injection molding due to non-uniform heating of the material can be avoided in the manner.

Description

Technical Field

[0001] This utility model belongs to the field of hot runner technology, and specifically relates to a hot runner mold. Background Technology

[0002] Hot runner injection molding uses heating to keep the plastic in the runner and gate in a molten state. Because heating coils and heating rods are located near or in the center of the runner, the entire runner from the injection nozzle outlet to the gate is at a high temperature, keeping the plastic in the runner constantly molten. This eliminates the need to remove runner waste during each mold opening and part removal; the molten material remaining in the hot runner system can be injected into the cavity during the next injection, reducing material waste, avoiding freezing time and subsequent processing, resulting in more aesthetically pleasing products, and improving production efficiency and economic benefits. It is a hot research direction in plastic injection molding technology. However, existing hot runner molds use a single hot nozzle for injection molding of small and micro products. This injection method has extremely low injection efficiency. For 32-pin electronic connector plugs, existing hot runner molds are clearly unsuitable for mass production, limiting practicality and affecting production efficiency. Injection with multiple hot nozzles can lead to uneven heating, affecting material flow and even causing runner blockage. Utility Model Content

[0003] The purpose of this invention is to provide a hot runner mold, which aims to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a hot runner mold, comprising an I-shaped manifold, with several through-holes symmetrically opened on both sides of the manifold, an injection nozzle installed at the top center of the manifold, a cylinder provided at the top of the manifold, a valve sleeve installed at the flow hole at the top of the manifold, a valve needle installed inside the valve sleeve, and hot nozzle bases installed at the flow holes at the bottom of the manifold, with a hot nozzle body inserted inside the hot nozzle base. One end of the valve needle is connected to the telescopic end of the cylinder, and the other end of the valve needle passes through the flow hole and is inserted into the hot nozzle body. Multiple heating grooves are symmetrically opened at the top and bottom of the manifold, one of which is located at the injection nozzle, and a heating tube is installed inside the heating groove.

[0005] As a preferred technical solution of this utility model, an injection hole is provided at the top center of the flow divider plate, and the injection nozzle is installed at the injection hole. A first flow channel and a second flow channel are provided inside the flow divider plate. The injection hole is connected to the first flow channel. The material is transported to both sides of the flow divider plate through the first flow channel. The second flow channel is located at the bottom of the first flow channel. The first flow channel is connected to the second flow channel, and the second flow channel is connected to the flow hole.

[0006] As a preferred embodiment of this invention, the number of flow holes is 32, the number of second flow channels is 8, and each second flow channel connects to 4 flow holes.

[0007] As a preferred technical solution of this utility model, the heating groove has a concave U-shaped structure, and each heating groove on both sides of the flow divider has 6 flow holes distributed in it.

[0008] As a preferred technical solution of this utility model, a first arc-shaped groove is provided on one side of the hot nozzle base, and a second arc-shaped groove is provided on one side of the top of the hot nozzle body. Positioning pins are installed in the first arc-shaped groove and the second arc-shaped groove.

[0009] As a preferred technical solution of this utility model, a heat insulation cap is fitted onto the bottom end of the hot nozzle body.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: the manifold is heated by multiple heating tanks, one of which has a heating tube that heats the plastic at the injection nozzle, while each of the other heating tanks has 6 flow holes distributed in it. The flow holes not distributed in the heating tanks are also distributed on the side of the heating tanks. This method can heat the material fully and evenly, so that the material can always maintain good fluidity in the first and second flow channels. This method can avoid uneven heating of the material affecting injection molding. The multiple hot nozzle bodies enable the mold to perform 32 injections in a single operation, thereby greatly improving the production efficiency of the product. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the diverter plate in this utility model;

[0015] Figure 4 This is a schematic diagram of the internal structure of the diverter plate in this utility model;

[0016] Figure 5 This is a schematic diagram of the structure of the hot nozzle base and the hot nozzle body in this utility model.

[0017] In the diagram: 1. Manifold; 2. Flow orifice; 3. Injection nozzle; 4. Cylinder; 5. Valve sleeve; 6. Valve needle; 7. Hot nozzle base; 8. Hot nozzle body; 9. Heating groove; 10. Heating tube; 11. First flow channel; 12. Second flow channel; 13. First arc-shaped groove; 14. Second arc-shaped groove; 15. Heat insulation cap; 16. Positioning pin. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1-5 The present invention provides the following technical solution: a hot runner mold, comprising an I-shaped manifold 1, with several through-holes 2 symmetrically opened on both sides of the manifold 1, an injection nozzle 3 installed at the top center of the manifold 1, a cylinder 4 provided at the top of the manifold 1, a valve sleeve 5 installed at the top of the manifold 1 at the flow hole 2, a valve needle 6 installed inside the valve sleeve 5, a hot nozzle base 7 installed at the bottom of the manifold 1 at the flow hole 2, a hot nozzle body 8 inserted inside the hot nozzle base 7, one end of the valve needle 6 connected to the telescopic end of the cylinder 4, the other end of the valve needle 6 passing through the flow hole 2 and inserted inside the hot nozzle body 8, multiple heating grooves 9 symmetrically opened at the top and bottom of the manifold 1, one of the heating grooves 9 being located at the injection nozzle 3, a heating tube 10 installed inside the heating groove 9, and a heat insulation cap 15 fitted onto the bottom of the hot nozzle body 8.

[0020] In this embodiment, an injection hole is provided at the top center of the flow divider plate 1, and an injection nozzle 3 is installed at the injection hole. A first flow channel 11 and a second flow channel 12 are provided inside the flow divider plate 1. The injection hole is connected to the first flow channel 11, and the material is transported to both sides of the flow divider plate 1 through the first flow channel 11. The second flow channel 12 is located at the bottom of the first flow channel 11, and the first flow channel 11 is connected to the second flow channel 12. The second flow channel 12 is connected to the flow hole 2.

[0021] Specifically, molten material is injected into the first flow channel 11 through the injection nozzle 3. The material flows through the first flow channel 11 to both sides of the flow divider plate 1. After entering both sides of the flow divider plate 1, the material enters the second flow channel 12 and flows evenly into the corresponding flow hole 2.

[0022] In this embodiment, there are 32 flow holes 2 and 8 second flow channels 12. Each second flow channel 12 connects 4 flow holes 2. The heating tank 9 has a U-shaped structure. Each heating tank 9 on both sides of the flow divider plate 1 has 6 flow holes 2 distributed in it.

[0023] Specifically, the heating tube 10 located at the injection nozzle 3 heats the material entering the first flow channel 11 to maintain good flowability. Each of the other heating tanks 9 has 6 flow holes 2 distributed in it, and the flow holes 2 not distributed in the heating tanks 9 are also distributed on the side of the heating tanks 9. In this way, the material can be heated fully and evenly, so that the material can always maintain good flowability in the first flow channel 11 and the second flow channel 12. In this way, uneven heating of the material can be avoided, which would cause flow channel blockage and affect injection molding.

[0024] In this embodiment, a first arc-shaped groove 13 is provided on one side of the hot nozzle base 7, and a second arc-shaped groove 14 is provided on one side of the top of the hot nozzle body 8. Positioning pins 16 are installed in the first arc-shaped groove 13 and the second arc-shaped groove 14.

[0025] Specifically, the first arc-shaped groove 13, together with the second arc-shaped groove 14 and the positioning pin 16, facilitates and quickly positions and installs the hot nozzle base 7, and this method can improve the stability of the hot nozzle base 7 during use.

[0026] In this embodiment, a heat insulation cap 15 is fitted onto the bottom end of the heat nozzle body 8.

[0027] Working principle: During injection molding, cylinder 4 drives valve needle 6 to rise, allowing molten plastic to be injected through the hot nozzle body 8. Cylinder 4 then drives valve needle 6 to descend, sealing the bottom of the hot nozzle body 8 and ending the injection process. During this process, molten plastic is injected into the first flow channel 11 through injection nozzle 3. The heating tube 10 located at injection nozzle 3 heats the injected material, maintaining its good flowability. After flowing through the first flow channel 11 to both sides of the flow divider plate 1, the material is further heated evenly by the heating tubes 10 on both sides, allowing the material to flow smoothly and evenly. The material flows through the first flow channel 11 into the second flow channel 12 and into the flow holes 2. Each heating tank 9 on both sides of the manifold 1 is provided with 6 flow holes 2, and the flow holes 2 not distributed in the heating tank 9 are also distributed on the side of the heating tank 9. In this way, the material can be heated fully and evenly, so that the material can always maintain good fluidity in the first flow channel 11 and the second flow channel 12. This method can avoid the flow channel blockage caused by uneven heating of the material, which will affect the injection molding. The multiple hot nozzle bodies 8 make the mold able to perform 32 injections in one go, thereby greatly improving the production efficiency of the product.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A hot runner mold, comprising an I-shaped manifold (1), characterized in that: The flow divider (1) has several through-holes (2) symmetrically opened on both sides. The top center of the flow divider (1) is equipped with an injection nozzle (3). The top of the flow divider (1) is equipped with a cylinder (4). The top of the flow divider (1) is equipped with a valve sleeve (5) at the flow hole (2). A valve needle (6) is installed in the valve sleeve (5). A hot nozzle base (7) is installed at the bottom of the flow divider (1) at the flow hole (2). A hot nozzle body (8) is inserted into the hot nozzle base (7). One end of the valve needle (6) is connected to the telescopic end of the cylinder (4). The other end of the valve needle (6) passes through the flow hole (2) and is inserted into the hot nozzle body (8). The top and bottom of the flow divider (1) are symmetrically opened with multiple heating grooves (9). One of the heating grooves (9) is located at the injection nozzle (3). A heating tube (10) is installed in the heating groove (9).

2. A hot runner mold according to claim 1, characterized in that: The top center of the flow divider (1) is provided with an injection hole, and the injection nozzle (3) is installed at the injection hole. The flow divider (1) is provided with a first flow channel (11) and a second flow channel (12). The injection hole is connected to the first flow channel (11). The material is transported to both sides of the flow divider (1) through the first flow channel (11). The second flow channel (12) is located at the bottom of the first flow channel (11). The first flow channel (11) is connected to the second flow channel (12). The second flow channel (12) is connected to the flow hole (2).

3. A hot runner mold according to claim 2, characterized in that: The number of flow holes (2) is 32, and the number of second flow channels (12) is 8, with each second flow channel (12) connecting 4 flow holes (2).

4. A hot runner mold according to claim 1, characterized in that: The heating groove (9) has a concave U-shaped structure, and each heating groove (9) on both sides of the flow divider (1) has 6 flow holes (2).

5. A hot runner mold according to claim 1, characterized in that: The hot nozzle base (7) has a first arc-shaped groove (13) on one side, and the hot nozzle body (8) has a second arc-shaped groove (14) on one side of the top. Positioning pins (16) are installed in the first arc-shaped groove (13) and the second arc-shaped groove (14).

6. A hot runner mold according to claim 1, characterized in that: A heat insulation cap (15) is fitted onto the bottom end of the heat nozzle body (8).

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