Composite heat nozzle

Abstract

The utility model relates to the technical field of hot nozzle, concretely relates to a composite hot nozzle, including nozzle body and the gate bushing of being located nozzle body lower extreme, nozzle body and gate bushing cooperation form the runner, the middle part of gate bushing is equipped with the glue hole, the runner includes the feeding section, compression section and the discharge section, and the feeding section is located in the middle part of nozzle body, and the outside of nozzle body is equipped with the heat conduction cover, and compression section is located in nozzle body and gate bushing assembly part, and the discharge section is located in the lower part of gate bushing, and the glue hole below that gate bushing is equipped with the needle stopper, the utility model adopts the way of nozzle body and heat conduction cover split type combination, makes the inside of hot nozzle for wear -resisting material, and the outside is copper material with good heat conductivity, solves the problem that hot nozzle wear resistance and heat conductivity cannot be taken into account, and the outside of nozzle body is wrapped up to the heat conduction cover, reduces the volume of nozzle body, carries out the heat conduction work through the heat conduction cover, makes the overall temperature of hot nozzle controllability higher, avoids the situation that hot nozzle overheats, improves the yield of product.

Description

Technical Field

[0001] This utility model relates to the field of hot nozzle technology, specifically to a composite hot nozzle. Background Technology

[0002] Hot runner molds are a commonly used type of plastic injection molding mold. The hot runner nozzle is a key injection component in the mold. Traditional hot runner nozzles are usually made of one-piece molding. When heating the hot runner nozzle with heating equipment, the nozzle is made of metal material with a certain thickness, which has poor thermal conductivity. The heating time required for the hot runner nozzle is long and the heat generated is large. When the one-piece molding hot runner nozzle is at a high temperature, it is easy to cause the injection material in the runner to deform, resulting in the injection material turning yellow and failing to achieve the ideal molding effect, with a high defect rate. After long-term use, the hot runner nozzle outlet hole wears down, causing material to overflow. Traditional single-material hot runner nozzles cannot simultaneously achieve wear resistance and thermal conductivity. Utility Model Content

[0003] The purpose of this invention is to provide a composite hot nozzle, which aims to improve the problem of how an integrated hot nozzle can balance wear resistance and thermal conductivity.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A composite hot nozzle includes a nozzle body and a sprue located at the lower end of the nozzle body. The nozzle body and the sprue cooperate to form a flow channel. The sprue has a dispensing hole in the middle. The flow channel includes a feeding section, a compression section and a dispensing section. The feeding section is located in the middle of the nozzle body. A heat-conducting sleeve is provided on the outside of the nozzle body. The compression section is located at the assembly part of the nozzle body and the sprue. The dispensing section is located at the lower part of the sprue. A stop pin is provided below the dispensing hole of the sprue.

[0006] Preferably, the gate is further provided with an assembly hole for assembling the stop pin, the assembly hole being disposed through the outlet hole below the outlet hole.

[0007] Preferably, the heat-conducting sleeve wraps around the outer periphery of the nozzle body, and the heat-conducting sleeve covers the outside of the feeding section and the compression section.

[0008] Preferably, the heat-conducting sleeve is made of copper.

[0009] Preferably, the stop pin is made of tungsten steel.

[0010] Preferably, an outer nozzle core and an inner nozzle core are provided between the gate and the nozzle body, and the inner nozzle core is connected to the flow channel provided by the nozzle body and the gate.

[0011] Preferably, the upper part of the gate is provided with an external thread, and the gate is assembled with the nozzle body through the external thread by means of the threaded engagement.

[0012] Preferably, the upper part of the gate is provided with an installation groove for assembling the outer nozzle core, and the lower part of the gate has a flared flow channel.

[0013] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0014] 1. This utility model adopts a separate combination of nozzle body and heat-conducting sleeve, so that the inside of the hot nozzle is made of wear-resistant material and the outside is made of copper material with good thermal conductivity, thus solving the problem that the wear resistance and thermal conductivity of the hot nozzle cannot be achieved at the same time.

[0015] 2. This utility model reduces the volume of the nozzle body by wrapping it with a heat-conducting sleeve. The heat is conducted through the heat-conducting sleeve, making the overall temperature of the hot nozzle more controllable, avoiding overheating of the hot nozzle, and improving the product yield.

[0016] 3. The stop pin of this utility model gate can effectively prevent material leakage caused by wear of the ejector hole, avoid leakage affecting the quality of injection molded products, and ensure that the gate maintains stable performance during long-term use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the composite heat nozzle described in this utility model;

[0018] Figure 2 This is a cross-sectional view of the gate of the composite hot nozzle described in this utility model.

[0019] Figure 3 This is a cross-sectional structural diagram of the gate of the composite hot nozzle described in this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100. Nozzle body; 200. Sprue; 300. Runner; 400. Heat-conducting jacket; 500. Baffle pin; 600. Outer nozzle core; 700. Inner nozzle core;

[0022] 210, Glue outlet; 220, Assembly hole; 230, External thread; 240, Mounting groove; 250, Flared mouth;

[0023] 310. Feeding section; 320. Compression section; 330. Discharge section. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] Additionally, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are all based on the orientation or positional relationship shown in the accompanying drawings. They are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element of this utility model must have a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] When an element is referred to as being "fixed to," "set on," or "contained on" another element, it can be directly on or indirectly on that other element. When an element is referred to as being "connected to," it can be directly connected to or indirectly connected to that other element.

[0027] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Example

[0029] Please refer to Figure 1-3 As shown, this embodiment provides a composite hot nozzle, including a nozzle body 100 and a sprue 200 located at the lower end of the nozzle body 100. The nozzle body 100 and the sprue 200 cooperate to form a flow channel 300. The sprue 200 has a discharge hole 210 in the middle. The flow channel 300 includes a feeding section 310, a compression section 320 and a discharge section 330. The feeding section 310, the compression section 320 and the discharge section 330 cooperate to form a complete injection molding flow channel 300. The feeding section 310 is located in the middle of the nozzle body 100. A heat-conducting sleeve 400 is provided on the outside of the nozzle body 100. The compression section 320 is located at the assembly part of the nozzle body 100 and the sprue 200. The discharge section 330 is located at the lower part of the sprue 200. A stop pin 500 is provided below the discharge hole 210 of the sprue 200.

[0030] The injection material preferentially flows into the feed section 310, and then flows into the compression section 320 through the flow channel 300 provided in the nozzle body 100. After entering the inner nozzle core 700 in the compression section 320, the flow rate of the injection material decreases sharply. As the injection material continues to flow, it finally enters the discharge section 330 through the discharge hole 210. The heat-conducting sleeve 400 ensures that the injection material maintains a stable temperature when flowing in the hot nozzle. The nozzle body 100 and the heat-conducting sleeve 400 are combined in a separate manner, so that the inside of the hot nozzle is made of wear-resistant material and the outside is made of copper material with good thermal conductivity, which solves the problem of not being able to balance the wear resistance and thermal conductivity of the hot nozzle.

[0031] As attached Figure 3 As shown, the sprue 200 is further provided with an assembly hole 220 for mounting the stop pin 500. The assembly hole 220 is provided through the hole below the ejector hole 210. The stop pin 500 is placed horizontally below the sprue 200. When the ejector hole 210 provided by the sprue 200 wears down after long-term operation, the diameter will increase and the flow rate of the ejector hole 210 will increase. This will exceed the original residence time of the injection material set by the ejector hole 210, and the injection material will easily flow out. The injection material flows out into the mold cavity and will cool and clump in the mold cavity, affecting the yield of the injection molded products.

[0032] The stop pin 500 is positioned below the ejector hole 210. When the ejector hole 210 wears down, the outflowing injection material will first contact the stop pin 500 and be blocked by it below the ejector hole 210 of the sprue 200. Since the injection material itself has poor flowability without external pressure, it will accumulate above the stop pin 500. The accumulated injection material cools and flows more slowly, further delaying the outflow of injection material after the ejector hole 210 wears down, thus preventing the injection material from flowing into the mold cavity. The stop pin 500 of the sprue 200 effectively prevents material outflow caused by the wear of the ejector hole 210, avoiding outflow that could affect the quality of the injection molded product, and ensuring the stable performance of the sprue 200 during long-term use.

[0033] As attached Figure 1 As shown, the heat-conducting sleeve 400 further wraps around the outer periphery of the nozzle body 100 and covers the outside of the feed section 310 and the compression section 320, performing heat conduction and insulation work on the feed section 310 and the compression section 320. The heat-conducting sleeve 400 can increase the thermal conductivity of the nozzle body 100 and the gate 200. Furthermore, the heat-conducting sleeve 400 can also adopt a full-wrap design to maximize the heat conduction area, ensure uniform heat conduction, and avoid cold spots. The heat-conducting sleeve 400 wraps around the outside of the nozzle body 100, reducing the volume of the nozzle body 100. Through the heat conduction work of the heat-conducting sleeve 400, the overall temperature controllability of the hot nozzle is higher, avoiding the hot nozzle overheating and improving the yield of injection molded products.

[0034] Furthermore, the heat-conducting sleeve 400 is made of copper. The copper heat-conducting sleeve 400 can significantly improve the thermal conductivity of the hot nozzle, so that even when the nozzle body 100 is made of wear-resistant material, the hot nozzle can still have a certain degree of thermal conductivity.

[0035] Furthermore, the stop pin 500 is made of tungsten steel. The wear resistance of the stop pin 500 made of tungsten steel is higher than that of the gate 200. Even after the gate 200 has been worn for a long time, the stop pin 500 can still play a significant role in blocking the material. When the gate 200 is not worn, the stop pin 500 can prevent the injection material from dripping directly at the gate 210. It is suitable for injection molding of materials with different fluidity and has a wide range of applications.

[0036] As attached Figure 1 As shown, further, an outer nozzle core 600 and an inner nozzle core 700 located in the middle of the outer nozzle core 600 are provided between the gate 200 and the nozzle body 100. The inner nozzle core 700 compresses the injection material flowing into the runner 300 to the discharge hole 210 provided by the gate 200. The inner nozzle core 700 connects the nozzle body 100 and the runner 300 provided by the gate 200.

[0037] As attached Figure 3 As shown, the upper part of the gating nozzle 200 is provided with an external thread 230. The gating nozzle 200 is assembled with the nozzle body 100 through the external thread 230, thereby fixing the outer nozzle core 600 and the inner nozzle core 700 placed in the nozzle body 100 and the gating nozzle 200.

[0038] As attached Figure 2 As shown, the upper part of the sprue 200 is provided with an installation groove 240 for the outer nozzle core 600 to be assembled. After the outer nozzle core 600 is installed in the installation groove 240, when the sprue 200 and the nozzle body 100 are engaged, the inner nozzle core 700 installed therein will be pushed and fixed. The lower runner 300 of the sprue 200 is shaped like a flared mouth 250. The flared mouth 250 of the runner 300 facilitates the discharge of the compressed injection molding material to complete the injection molding work.

[0039] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A composite hot runner, comprising a runner body and a gating nozzle disposed at the lower end of the runner body, wherein the runner body and the gating nozzle cooperate to form a flow channel, and the gating nozzle has a dispensing hole in the middle, characterized in that, The flow channel includes a feeding section, a compression section, and a discharge section. The feeding section is located in the middle of the nozzle body, and a heat-conducting sleeve is provided on the outside of the nozzle body. The compression section is located at the assembly part of the nozzle body and the gate assembly. The discharge section is located at the lower part of the gate assembly. A stop pin is provided below the glue outlet hole of the gate assembly.

2. The composite hot runner according to claim 1, characterized in that: The gate is also provided with an assembly hole for assembling the stop pin, and the assembly hole is provided through the glue outlet hole below.

3. The composite hot runner according to claim 1, characterized in that: The heat-conducting sleeve is wrapped around the outer periphery of the nozzle body, and the heat-conducting sleeve covers the outside of the feeding section and the compression section.

4. The composite hot runner according to claim 1, characterized in that: The heat-conducting sleeve is made of copper.

5. The composite hot runner according to claim 1, characterized in that: The stop pin is made of tungsten steel.

6. The composite hot runner according to claim 1, characterized in that: The gate valve and the nozzle body are further provided with an outer nozzle core and an inner nozzle core located in the middle of the outer nozzle core. The inner nozzle core connects the nozzle body and the flow channel provided by the gate valve.

7. The composite hot runner according to claim 1, characterized in that: The upper part of the gate is provided with an external thread, and the gate is assembled with the nozzle body through the external thread by thread engagement.

8. The composite hot runner according to claim 6, characterized in that: The upper part of the gate is provided with an installation groove for the outer nozzle core to be assembled, and the lower part of the gate has a flared flow channel.

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