Nozzle core structure of hot nozzle of hot runner

Abstract

A nozzle core structure of a hot nozzle of a hot runner comprises a core seat, a cavity is formed in the core seat, an elastic piece is arranged in the cavity, the top of the elastic piece abuts against an inner nozzle core, a connecting sleeve is fixedly connected to the outside of the core seat, a flowing channel is formed between the connecting sleeve and the core seat, and injection molding materials flow out to a discharging port through the flowing channel. A workpiece moves towards the direction of the cavity during injection molding through elasticity generated by abutting of the elastic piece and the inner nozzle core, injection molding operation is conducted, after injection molding is completed, the elastic piece supports the inner nozzle core to move outwards and completely abut against the material opening, redundant raw materials cannot be left in the material opening and flow out of the material opening, the cleaning step of the nozzle core structure of the hot nozzle is reduced, and the production efficiency is improved. And moreover, a flowing channel is additionally arranged, injection molding materials can be conveyed through the flowing channel, the materials are smoother in the injection process, the situation that the injection molding period is prolonged due to uneven flowing of the materials is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a hot runner nozzle core structure, belonging to the field of injection molding machine accessories. Background Art

[0002] The hot runner system is an important part of injection molding die production equipment. By using the principles of heating and temperature control, the runner part of the die is kept in a molten state. The nozzle core is used to help the plastic part form. The existing nozzle core is integrally formed. After the material discharging is completed, the residual material in contact with the plastic part at the head of the nozzle core will remain and flow out of the material outlet. During subsequent cleaning, it is necessary to reach into the material outlet for cleaning, which is difficult and may damage the nozzle core. This application is an improvement based on the one with the publication number CN219095740U. There are still problems with the unsmooth flow of the original structure of the material, and the structure for avoiding the remaining of residual material at the head of the nozzle core is relatively slow, leaving room for improvement. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the defects and deficiencies existing in the prior art, and to provide a hot runner nozzle core structure.

[0004] A hot runner nozzle core structure includes a core seat. A cavity is arranged inside the core seat. An elastic member is arranged inside the cavity. The top of the elastic member abuts against an inner nozzle core. A connecting sleeve is fixedly connected outside the core seat. A flow channel is arranged between the connecting sleeve and the core seat. The flow channel is used for the injection molding material to flow out to the material outlet. During use, the elasticity generated by the abutment of the elastic member and the inner nozzle core causes the workpiece to move towards the cavity direction during injection molding for injection molding operations. After the injection molding is completed, the elastic member supports the inner nozzle core to move outwards and is in full abutment with the material outlet, so that no excess raw material will be left in the material outlet and flow out of the material outlet, reducing the cleaning steps of the hot runner nozzle core structure, improving the thermoplastic quality, and additionally arranging a flow channel, which can be used to transport the injection molding material through the flow channel, making the material flow more smoothly during the injection process, helping to reduce the extension of the injection molding cycle caused by uneven material flow, and improving the production efficiency.

[0005] Preferably, a partition block is arranged inside the connecting sleeve. The intervals between adjacent partition blocks form a flow channel. The design of the partition block can effectively guide and distribute the incoming material, making the material flow more evenly in the flow channel, reducing the dead corners of the material flow in the hot runner system, and improving the overall efficiency of injection molding.

[0006] Furthermore, the number of the flow channels is four, which are evenly distributed around the inside of the connecting sleeve. The provision of four mutually independent and evenly distributed flow channels enables better distribution of the molten plastic during the flow process, thereby achieving more uniform material injection, improving the consistency and quality of the finished product. The design of multiple flow channels can significantly reduce the flow resistance of a single channel, making the material flow more smoothly during injection, helping to reduce the extension of the injection cycle caused by uneven material flow, and improving production efficiency.

[0007] Furthermore, the connecting surface between the top of the partition block and the core seat is arranged in an arc shape. The arc-shaped connecting surface can effectively reduce the friction and resistance generated when the molten plastic flows, making it easier for the plastic to pass through the flow channel smoothly, thereby improving the overall injection efficiency. Due to the smooth shape of the arc, it helps to prevent the plastic from staying on the connecting surface, reducing the cleaning difficulty and making the maintenance and cleaning process more convenient and fast, ensuring that the hot runner system is always in good working condition.

[0008] Preferably, the top of the inner nozzle core is in the shape of a frustum of a cone, and the outer conical surface of the frustum of the cone is concave. The concave setting can make the contact area between the material and the inner nozzle core larger, so it can more easily push the inner nozzle core towards the cavity direction to discharge the material, preventing the problem that the material cannot push the inner nozzle core and causing blockage and non-discharge.

[0009] Preferably, a fixing block is provided at the bottom of the inner nozzle core. One end of the elastic member abuts against the bottom of the cavity, and the other end is sleeved outside the fixing block. The setting of the fixing block provides a more stable support, keeping the inner nozzle core stable during use, reducing deformation caused by the high-temperature and high-pressure injection process, and thus ensuring the injection accuracy. The existence of the elastic member can effectively absorb and buffer the vibration and impact force generated during the injection process.

[0010] Furthermore, the elastic member is a spring; or an elastic sleeve. The elastic sleeve or spring is easy to obtain, saves costs while enhancing the use effect, can provide good sealing performance, prevent leakage of the molten plastic during injection, ensure smooth injection process, and improve the quality of the finished product.

[0011] Preferably, a fixing cone is provided at the bottom of the core seat for installation with the external bushing. The design of the fixing cone can ensure a stable connection between the core seat and the external bushing, reduce connection looseness caused by vibration or pressure changes during the injection process, and ensure the reliable operation of the hot runner system under high-temperature and high-pressure conditions.

[0012] The beneficial effects of the present utility model are as follows: The elasticity generated by the elastic member abutting against the inner nozzle core causes the workpiece to move towards the cavity during injection molding, and the injection molding operation is carried out. After the injection molding is completed, the elastic member supports the inner nozzle core to move outwards and is in complete abutment with the material port, so that no excess raw material is left in the material port and flows out of the material port, reducing the cleaning steps for the structure of the hot nozzle core, improving the thermoplastic quality, and additionally providing a flow channel, which can be used to transfer the injection molding material, making the material flow more smoothly during the injection process, helping to reduce the extension of the injection molding cycle caused by uneven material flow, and improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, obtaining other drawings based on these drawings still belongs to the scope of the present utility model.

[0014] Figure 1 It is a schematic diagram of the main structure of the present utility model;

[0015] Figure 2 It is a schematic diagram of the structure from another perspective of the present utility model;

[0016] Figure 3 It is a sectional structure diagram of the present utility model;

[0017] Figure 4 It is a rear view of the present utility model;

[0018] In the figure, 1, core seat; 11, cavity; 12, fixed cone; 2, elastic member; 3, inner nozzle core; 31, outer conical surface; 32, fixed block; 4, connecting sleeve; 41, flow channel; 42, partition block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the objectives, technical solutions, and advantages of the present utility model clearer, the following will further describe the present utility model in detail with reference to the drawings.

[0020] It should be noted that all the expressions using "first" and "second" in the embodiments of the present utility model are used to distinguish two entities or parameters with the same name but different, so it can be seen that "first" and "second" are only for the convenience of expression and should not be construed as a limitation on the embodiments of the present utility model. This will not be further explained in the subsequent embodiments.

[0021] The directional and positional terms mentioned in this utility model, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "top", "bottom", "side", etc., are only references to the directions or positions in the attached drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, rather than limiting the protection scope of this utility model.

[0022] As Figures 1-4 shown, it is an embodiment of the nozzle core structure of a hot runner hot nozzle of this utility model, including a core seat 1. A cavity 11 is provided inside the core seat 1. An elastic member 2 is provided inside the cavity 11. An inner nozzle core 3 is abutted against the top of the elastic member 2. A connecting sleeve 4 is fixedly connected outside the core seat 1. A flow channel 41 is provided between the connecting sleeve 4 and the core seat 1. The flow channel 41 is used for the injection molding material to flow out to the discharge port. During use, the elasticity generated by the abutment of the elastic member 2 and the inner nozzle core 3 causes the workpiece to move towards the cavity 11 during injection molding for injection molding operations. After the injection molding is completed, the elastic member 2 supports the inner nozzle core 3 to move outwards and is in full abutment with the material port, so that no excess raw material is left in the material port and flows out of the material port, reducing the cleaning steps of the hot nozzle core structure, improving the thermoplastic quality, and additionally providing a flow channel 41. The flow channel 41 can be used to transport the injection molding material, making the material flow more smoothly during the injection process, helping to reduce the extension of the injection molding cycle caused by uneven material flow, improving production efficiency, increasing the convenience of nozzle core disassembly and cleaning, and at the same time enhancing the service life of the equipment.

[0023] A partition block 42 is provided inside the connecting sleeve 4. The adjacent partition blocks 42 are arranged at intervals to form the flow channel 41. The design of the partition block 42 can effectively guide and distribute the inflowing material, making the material flow more evenly in the flow channel 41, reducing the dead corners of material flow in the hot runner system, and enhancing the overall efficiency of injection molding.

[0024] The number of the flow channels 41 is four, which are evenly distributed around the inside of the connecting sleeve 4. Four mutually independent and evenly distributed flow channels 41 can enable the molten plastic to be better distributed during the flow process, thereby achieving more uniform material injection, improving the consistency and quality of the finished product. The design of multiple flow channels 41 can significantly reduce the flow resistance of a single channel, making the material flow more smoothly during the injection process, helping to reduce the extension of the injection molding cycle caused by uneven material flow, and improving production efficiency.

[0025] The connection surface between the top of the separation block 42 and the core seat 1 is arranged in an arc shape. The arc-shaped connection surface can effectively reduce the friction and resistance generated when the molten plastic flows, making it easier for the plastic to smoothly pass through the flow channel 41, thereby improving the overall injection molding efficiency. Due to the smooth arc shape, it helps prevent the plastic from staying on the connection surface, reduces the cleaning difficulty, and makes the maintenance and cleaning process more convenient and fast, ensuring that the hot runner system is always in good working condition.

[0026] The top of the inner nozzle core 3 is in the shape of a truncated cone, and the outer conical surface 31 of the truncated cone is concave. The concave setting enables a larger contact area between the material and the inner nozzle core 3. Therefore, it can more easily push the inner nozzle core 3 towards the cavity 11 to discharge the material, preventing the problem that the material cannot push the inner nozzle core 3 and causing blockage and non-discharge.

[0027] A fixing block 32 is provided at the bottom of the inner nozzle core 3. One end of the elastic member 2 abuts against the bottom of the cavity 11, and the other end is sleeved outside the fixing block 32. The setting of the fixing block 32 provides a more stable support, keeps the inner nozzle core 3 stable during use, reduces deformation caused by the high-temperature and high-pressure injection molding process, and thus ensures the injection accuracy. The existence of the elastic member 2 can effectively absorb and buffer the vibration and impact force generated during the injection molding process.

[0028] The elastic member 2 is a spring; or an elastic sleeve. The elastic sleeve or spring is easy to obtain, saves costs while increasing the use effect, can provide good sealing performance, prevent the leakage of molten plastic during the injection process, ensure the smooth injection process, and improve the quality of the finished product.

[0029] A fixing cone 12 is provided at the bottom of the core seat 1 for installation with an external bushing. The design of the fixing cone 12 can ensure a stable connection between the core seat 1 and the external bushing, reduce the connection looseness caused by vibration or pressure changes during the injection molding process, and ensure that the hot runner system can also work reliably under high-temperature and high-pressure conditions.

[0030] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

[0031] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention aims to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A hot runner nozzle core structure, characterized in that: It includes a core seat, a cavity is provided in the core seat, an elastic member is provided in the cavity, an inner nozzle core is abutted against the top of the elastic member, a connecting sleeve is fixedly connected to the outside of the core seat, a flow channel is provided between the connecting sleeve and the core seat, and the flow channel is used for the injection molding material to flow out to the discharge port.

2. The hot runner nozzle core structure according to claim 1, characterized in that: A separation block is arranged in the connecting sleeve, and adjacent separation blocks are arranged at intervals to form a flow channel.

3. The hot runner nozzle core structure according to claim 2, characterized in that: The number of the flow channels is four, and they are evenly distributed inside the connecting sleeve.

4. The hot runner nozzle core structure according to claim 2, characterized in that: The connection surface between the top of the partition block and the core seat is arranged in an arc shape.

5. The hot runner nozzle core structure according to claim 1, characterized in that: The top of the inner nozzle core is in the shape of a truncated cone, and the outer conical surface of the truncated cone is in a concave configuration.

6. The hot runner nozzle core structure according to claim 1, characterized in that: A fixing block is arranged at the bottom of the inner nozzle core, one end of the elastic member abuts against the bottom of the cavity, and the other end is sleeved on the outside of the fixing block.

7. The hot runner nozzle core structure according to claim 1 or 6, characterized in that: The elastic member is a spring; or an elastic sleeve.

8. The hot runner nozzle core structure according to claim 1, characterized in that: A fixing cone is provided at the bottom of the core seat for installation with an external bushing.

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