A hot runner injection mold

Abstract

The utility model relates to injection mold technical field especially relates to a hot runner injection mold, including mould body, still including the shunt plate of setting in the mould body, set up the loading port on the mould body, set up the hot runner cavity in the shunt plate, set up the hot flow pipeline in the hot runner cavity, set up the blanking pipeline of shunt plate bottom, set up the hot nozzle of blanking pipeline export, the utility model hot flow pipeline and hot nozzle control temperature respectively, and control device controls heating resistance silk to heat flow pipeline heating, and control hot nozzle heating resistance silk carries out heating to hot nozzle, can be applicable to different application occasion, when the injection molding of some mouth tip temperature requirement higher plastic product, can adjust mouth tip temperature properly, make overall temperature compare balance, avoid mouth tip cold material to cause seal bad and sprue burr, and can guarantee the temperature of hot flow pipeline when injecting glue, avoid the glue solidification in hot flow pipeline.

Description

Technical Field

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

[0002] Injection molds are tools used to produce plastic products; they also give plastic products their complete structure and precise dimensions. Injection molds inject resin material into a metal mold to obtain a product with a specific shape. Although the structure of the mold can vary greatly depending on the type and properties of the plastic, the shape and structure of the plastic product, and the type of injection molding machine, the basic structure remains consistent. To achieve more precise product dimensions, precision injection molds are commonly used. Hot runners are heating components used in injection molds to inject molten plastic particles into the mold cavity. This is a novel construction that eliminates the need to remove the runner and sprue. In existing hot runner injection molds, when the plastic material is heated and ejected through a hot nozzle, it tends to cool and solidify within the runner after heating, causing nozzle blockage and affecting the normal injection process, resulting in poor stability. Utility Model Content

[0003] The purpose of this invention is to provide a hot runner injection mold that addresses the shortcomings of existing technologies. This hot runner mold can heat the runner, ensuring the normal flow of the material within the runner and preventing clogging of the nozzle.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a hot runner injection mold, comprising a mold body, a manifold plate disposed within the mold body, a feed port disposed on the mold body, a hot runner cavity disposed within the manifold plate, a hot runner pipe disposed within the hot runner cavity, a discharge pipe disposed at the bottom of the manifold plate, a hot nozzle disposed at the outlet of the discharge pipe, and an injection cavity disposed below the hot nozzle. One end of the hot runner pipe is connected to the feed port, and the other end of the hot runner pipe is connected to the feed inlet of the discharge pipe. The hot flow pipe is connected to a control device. A heating resistance wire is wound around the outside of the hot flow pipe and is electrically connected to the control device. The hot nozzle includes an inner flow channel, a nozzle core, and a heating sleeve. The inlet of the inner flow channel is connected to the outlet of the feed pipe. The nozzle core is located at the outlet of the inner flow channel. The heating sleeve is fitted around the outside of the nozzle core. A hot nozzle heating resistance wire is installed inside the heating sleeve and is electrically connected to the control device.

[0005] A further improvement to the above scheme is that the heating resistance wire is spirally wound around the outside of the heat flow pipe.

[0006] A further improvement to the above scheme is that a heat insulation layer is also provided on the outside of the heating resistance wire.

[0007] A further improvement to the above solution is that the nozzle core includes an inner flow channel and a material distribution component. The inner flow channel is disposed inside the nozzle core and is connected to the inner flow channel. The material distribution component is disposed at the outlet of the inner flow channel.

[0008] A further improvement to the above solution is that a connecting groove is provided at the bottom of the hot nozzle, and the nozzle core is threadedly connected to the bottom of the hot nozzle.

[0009] A further improvement to the above scheme is that the material distribution component includes a material distribution channel and a material distribution hole. The material distribution channel is provided in a plurality of ways, and the plurality of material distribution channels are evenly arranged circumferentially around the axis of the material distribution component. The material distribution hole is provided at the outlet of the material distribution channel 8.

[0010] A further improvement to the above scheme is that the heating resistance wire of the hot nozzle is spirally wound inside the heating sleeve.

[0011] A further improvement to the above scheme is that the temperature sensor is a thermocouple.

[0012] The beneficial effects of this utility model are as follows: This utility model includes a mold body, a manifold plate disposed within the mold body, a feed port disposed on the mold body, a hot runner cavity disposed within the manifold plate, a hot runner pipe disposed within the hot runner cavity, a discharge pipe disposed at the bottom of the manifold plate, a hot nozzle disposed at the outlet of the discharge pipe, and an injection cavity disposed below the hot nozzle. One end of the hot runner pipe is connected to the feed port, and the other end of the hot runner pipe is connected to the feed inlet of the discharge pipe. A temperature sensor is disposed on one side of the hot runner pipe, and the temperature sensor is electrically connected to a control device. A heating resistance wire is wound around the outside of the hot runner pipe and is electrically connected to the control device. The hot nozzle includes an inner flow channel, a nozzle core, and a heating sleeve. The inlet of the inner flow channel is connected to the outlet of the discharge pipe. The nozzle core is disposed at the outlet of the inner flow channel. The heating sleeve is sleeved on the outside of the nozzle core. A hot nozzle heating resistance wire is disposed inside the heating sleeve and is electrically connected to the control device.

[0013] This invention features separate temperature control for the hot runner and the hot nozzle. The control device controls the heating resistance wire to heat the hot runner and the heating resistance wire to heat the hot nozzle. It is suitable for various applications. When injection molding plastic products with high nozzle tip temperature requirements, the nozzle tip temperature can be appropriately adjusted to achieve a more balanced overall temperature, preventing poor sealing and burrs at the gate caused by cold material at the nozzle tip. It also ensures the temperature of the hot runner during injection, preventing the material inside the hot runner from solidifying, effectively ensuring normal injection molding and providing strong stability in use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a cross-sectional view of the present invention.

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0017] Figure 4 This is a schematic diagram of the nozzle core of this utility model.

[0018] Figure 5 This is a schematic diagram of the control device principle of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Mold body; 2. Manifold; 3. Feed port; 4. Hot runner cavity; 5. Hot runner pipe; 51. Temperature sensor; 52. Control device; 53. Heating resistance wire; 531. Heat insulation layer; 6. Discharge pipe; 7. Hot nozzle; 71. Inner flow channel; 72. Nozzle core; 721. Nozzle core inner flow channel; 722. Material distribution component; 7221. Material distribution channel; 7222. Material distribution hole; 7222. Connecting groove; 723. Heating sleeve; 73. Hot nozzle heating resistance wire; 731. Injection cavity; 8. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings, such as... Figure 1-5As shown, this utility model provides a hot runner injection mold, including a mold body 1, a manifold 2 disposed within the mold body 1, a feed port 3 disposed on the mold body 1, a hot runner cavity 4 disposed within the manifold 2, a hot runner pipe 5 disposed within the hot runner cavity 4, a discharge pipe 6 disposed at the bottom of the manifold 2, a hot nozzle 7 disposed at the outlet of the discharge pipe 6, and an injection cavity 8 disposed below the hot nozzle 7. One end of the hot runner pipe 5 is connected to the feed port 3, and the other end of the hot runner pipe 5 is connected to the feed port of the discharge pipe 6. A temperature sensor 51 is disposed on one side of the hot runner pipe 5, and the temperature sensor 51 is electrically connected to a control device 52. A heating resistance wire 53 is wound around the outside of the hot runner pipe 5 and is electrically connected to the control device 52. The hot nozzle 7 includes an inner flow channel 71, a nozzle core 72, and a heating sleeve 73. The inlet of the inner flow channel 71 is... The nozzle 72 is connected to the outlet of the feed pipe 6 and is located at the outlet of the inner flow channel 71. The heating sleeve 73 is sleeved on the outside of the nozzle 72. The heating sleeve 73 is equipped with a hot nozzle heating resistance wire 731. The hot nozzle heating resistance wire 731 is electrically connected to the control device 52. The hot flow pipe 5 and the hot nozzle 7 are respectively controlled in terms of temperature. The control device 52 controls the heating resistance wire 53 to heat the hot flow pipe 5 and controls the hot nozzle heating resistance wire 731 to heat the hot nozzle 7. It can be used in different applications. When injection molding some plastic products with high nozzle tip temperature requirements, the nozzle tip temperature can be adjusted appropriately to make the overall temperature relatively balanced, avoid poor sealing and gate burrs caused by cold material at the nozzle tip, and ensure the temperature of the hot flow pipe 5 during injection, preventing the material in the hot flow pipe 5 from solidifying, effectively ensuring the normal injection molding process, and has strong stability in use.

[0021] The heating resistance wire 53 of this utility model is spirally wound around the outside of the heat flow pipe 5. The spiral heating resistance wire 53 can uniformly heat the heat flow pipe 5 and ensure that the temperature of the heat flow pipe 5 remains consistent throughout.

[0022] The heating resistance wire 53 of this utility model is also covered with a heat insulation layer 531. The heat insulation layer 531 can keep the heat flow pipe 5 warm, prevent the heat of the heat flow pipe 5 from being lost too quickly and increase the heating loss, and effectively save electricity costs.

[0023] The nozzle core 72 of this utility model includes an inner flow channel 721 and a distributing component 722. The inner flow channel 721 is disposed inside the nozzle core 72 and is connected to the inner flow channel 71. The distributing component 722 is disposed at the outlet of the inner flow channel 721. The nozzle core 72 is threadedly connected to the hot nozzle 7, which facilitates the maintenance and upkeep of the nozzle core 72, eliminates the need to replace the entire hot nozzle 7, and extends its service life.

[0024] The top of the heating sleeve 73 of this utility model abuts against the bottom of the limiting member 723, and the heating sleeve 73 is set close to the bottom of the hot nozzle 7.

[0025] The material distribution component 722 of this utility model includes a material distribution channel 7221 and a material distribution hole 7222. Several material distribution channels 7221 are provided, and the several material distribution channels 7221 are evenly arranged circumferentially around the axis of the material distribution component 722. The material distribution hole 7222 is provided at the outlet of the material distribution channel 7221. The injection molten metal needs to flow through multiple material distribution channels 7221 and then flow out through the material distribution hole 7222, which can make its mixing more uniform.

[0026] The heating resistance wire 731 of this utility model is spirally wound inside the heating sleeve 73, which can uniformly heat the hot nozzle, ensure the heating effect, and prevent the rubber material from solidifying inside the hot nozzle due to excessively low temperature.

[0027] The temperature sensor 51 of this utility model is a thermocouple with high temperature measurement accuracy, which can accurately detect the temperature inside the heat flow pipe 5.

[0028] Of course, the above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A hot runner injection mold, comprising a mold body (1), characterized in that: It also includes a manifold (2) disposed within the mold body (1), a feed port (3) disposed on the mold body (1), a hot runner cavity (4) disposed within the manifold (2), a hot runner pipe (5) disposed within the hot runner cavity (4), a discharge pipe (6) disposed at the bottom of the manifold (2), a hot nozzle (7) disposed at the outlet of the discharge pipe (6), and an injection cavity (8) disposed below the hot nozzle (7). One end of the hot runner pipe (5) is connected to the feed port (3), and the other end of the hot runner pipe (5) is connected to the feed inlet of the discharge pipe (6). A temperature sensor (51) is disposed on one side of the hot runner pipe (5). 51) A control device (52) is electrically connected. A heating resistance wire (53) is wound around the outside of the hot flow pipe (5). The heating resistance wire (53) is electrically connected to the control device (52). The hot nozzle (7) includes an inner flow channel (71), a nozzle core (72), and a heating sleeve (73). The inlet of the inner flow channel (71) is connected to the outlet of the feed pipe (6). The nozzle core (72) is located at the outlet of the inner flow channel (71). The heating sleeve (73) is sleeved on the outside of the nozzle core (72). A hot nozzle heating resistance wire (731) is provided inside the heating sleeve (73). The hot nozzle heating resistance wire (731) is electrically connected to the control device (52).

2. A hot runner injection mold according to claim 1, characterized in that: The heating resistance wire (53) is spirally wound around the outside of the heat flow pipe (5).

3. A hot runner injection mold according to claim 1, characterized in that: The heating resistance wire (53) is also covered with a heat insulation layer (531).

4. A hot runner injection mold according to claim 1, characterized in that: The nozzle core (72) includes a nozzle core inner flow channel (721) and a material distribution component (722). The nozzle core inner flow channel (721) is disposed inside the nozzle core (72) and is connected to the inner flow channel (71). The material distribution component (722) is disposed at the outlet of the nozzle core inner flow channel (721).

5. A hot runner injection mold according to claim 4, characterized in that: The bottom of the hot nozzle (7) is provided with a connecting groove (723), and the nozzle core (72) is threaded to the bottom of the hot nozzle (7).

6. A hot runner injection mold according to claim 4, characterized in that: The material distribution component (722) includes a material distribution channel (7221) and a material distribution hole (7222). There are several material distribution channels (7221), and the several material distribution channels (7221) are evenly arranged circumferentially around the axis of the material distribution component (722). The material distribution hole (7222) is located at the outlet of the material distribution channel (7221).

7. A hot runner injection mold according to claim 1, characterized in that: The heating resistance wire (731) of the hot nozzle is spirally wound inside the heating sleeve (73).

8. A hot runner injection mold according to claim 1, characterized in that: The temperature sensor (51) is a thermocouple.

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