Hot nozzle assembly and hot runner system

Abstract

The utility model discloses a hot nozzle assembly and a hot runner system, which comprise a hot nozzle body and a nozzle tip, the hot nozzle body is provided with a through hole, the nozzle tip is internally provided with a channel, one end of the nozzle tip is provided with an extension part extending outwards, and when the hot nozzle body and the nozzle tip are assembled together, the other end of the nozzle tip penetrates through the through hole and is exposed out of the hot nozzle body. The extending part abuts against one end of the hot nozzle body. According to the hot nozzle assembly and the hot runner system, the connecting structure of the nozzle tip and the hot nozzle body is changed, so that the nozzle tip is not easy to loosen relative to the hot nozzle body when the injection molding pressure is too large, and the glue leakage condition is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runner, and particularly to a hot nozzle assembly and a hot runner system. Background Art

[0002] In the related art, the tip of the hot nozzle of the hot runner system is screwed together with the inner screw thread on the inner side wall of the hot nozzle body by the external screw thread on the outer side wall of the gate bushing, so as to realize the connection and fixation of the hot nozzle tip and the hot nozzle body. However, this structure is prone to looseness under excessive injection pressure, resulting in glue leakage.

[0003] Therefore, the prior art needs to be improved and developed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a hot nozzle assembly and a hot runner system, which can prevent glue leakage even under excessive injection pressure.

[0005] In a first aspect, a hot nozzle assembly provided by the utility model includes: a hot nozzle body and a tip. A through hole is provided on the hot nozzle body, and a channel is provided inside the tip. One end of the tip has an extending portion extending outward. When the hot nozzle body and the tip are assembled together, the other end of the tip passes through the through hole and exposes outside the hot nozzle body, and the extending portion abuts against one end of the hot nozzle body.

[0006] According to an embodiment of the utility model, a receiving groove is provided on the end face of one end of the hot nozzle body, and the shape of the receiving groove is adapted to that of the extending portion. When the hot nozzle body and the tip are assembled together, the extending portion is located inside the receiving groove.

[0007] According to an embodiment of the utility model, the receiving groove communicates with the through hole.

[0008] According to an embodiment of the utility model, an installation portion extending outward is provided on the outer side wall of one end of the hot nozzle body.

[0009] According to an embodiment of the utility model, a heating wire is wound around the outer side wall of the hot nozzle body, and a collar is sleeved on the hot nozzle body, and the collar is connected to the installation portion.

[0010] According to an embodiment of the utility model, a convex portion is provided on the outer side wall of the hot nozzle body, and the length of the convex portion is less than the thickness of the collar, and the collar is sleeved on the convex portion.

[0011] According to an embodiment of the utility model, an avoidance groove is provided on the end face of one end of the collar close to the installation plate.

[0012] According to an embodiment of the present utility model, a stepped hole is provided on the above-mentioned mounting portion, and a blind hole is provided on the collar.

[0013] According to an embodiment of the present utility model, the above-mentioned nozzle tip is made of copper.

[0014] In a second aspect, a hot runner system provided by the present utility model includes the hot nozzle assembly described in the first aspect above.

[0015] The beneficial effects of the present utility model are as follows: By changing the connection structure between the nozzle tip and the hot nozzle body, the nozzle tip is not easily loosened relative to the hot nozzle body when the injection pressure is too high, thereby avoiding the occurrence of glue leakage in the hot nozzle assembly and the hot runner system of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions thereof are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0017] Figure 1 is a schematic structural view of the hot nozzle assembly in the embodiment of the present utility model;

[0018] Figure 2 is a cross-sectional view of the hot nozzle assembly in the embodiment of the present utility model;

[0019] Figure 3 is Figure 2 a partial enlarged view of;

[0020] Figure 4 is a cross-sectional view of the hot runner system in the embodiment of the present utility model.

[0021] Description of the reference numerals:

[0022] 1. Hot nozzle body; 11. Through hole; 12. Accommodating groove; 13. Mounting portion; 14. Convex portion; 15. Stepped hole; 2. Nozzle tip; 21. Channel; 22. Extension portion; 3. Heating wire; 4. Collar; 41. Relief groove; 42. Blind hole; 5. Injection nozzle; 6. Manifold plate; 7. Mold. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will disclose multiple embodiments of the present utility model with diagrams. For the sake of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details are not used to limit the present utility model. That is to say, in some embodiments of the present utility model, these practical details are unnecessary. In addition, for the purpose of simplifying the diagrams, some well-known and commonly used structures and components will be shown in a simple schematic manner in the diagrams.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings). If this specific posture changes, the directional indications will also change accordingly.

[0025] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes, not specifically referring to the order or sequence, nor are they used to limit the present utility model. They are merely used to distinguish components or operations described with the same technical terms, and should not be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0026] To further understand the content, characteristics and effects of the present utility model, the following embodiments are exemplified and described in detail with the accompanying drawings as follows:

[0027] In the first aspect, as Figure 1 and Figure 2 shown, a hot nozzle assembly provided by the present utility model includes a hot nozzle body 1 and a nozzle tip 2. A through hole 11 is provided on the hot nozzle body 1, a channel 21 is provided inside the nozzle tip 2, one end of the nozzle tip 2 has an extending portion 22 extending outward. When the hot nozzle body 1 and the nozzle tip 2 are assembled together, the other end of the nozzle tip 2 passes through the through hole 11 and exposes outside the hot nozzle body 1, and the extending portion 22 abuts against one end of the hot nozzle body 1.

[0028] Through the above technical solution, compared with fixing the nozzle tip 2 by screwing the external thread of the gate bushing with the internal thread on the inner side wall of the hot nozzle body 1, the fixing of the hot nozzle is more firm, and it is not easy to loosen even under excessive injection pressure, thus avoiding the risk of glue leakage.

[0029] In some preferred embodiments, a receiving groove 12 is provided on the end face of one end of the above-mentioned hot nozzle body 1, and the shape of the receiving groove 12 is adapted to that of the extending portion 22. When the hot nozzle body 1 and the nozzle tip 2 are assembled together, the extending portion 22 is located in the receiving groove 12. In specific applications, through the cooperation of the extending portion 22 and the receiving groove 12, the nozzle tip 2 can be quickly assembled at a predetermined position on the hot nozzle body 1.

[0030] In some preferred embodiments, the above-mentioned receiving groove 12 communicates with the through hole 11. In specific applications, by designing the receiving groove 12 to communicate with the through hole 11, it is more convenient for processing and production.

[0031] In some preferred embodiments, an installation portion 13 extending outward is provided on the outer side wall of one end of the above-mentioned hot nozzle body 1. In specific applications, the mold 7 has a groove adapted to the shape of the installation portion 13, and the cooperation between the groove and the installation portion 13 can play a positioning role, so as to facilitate the installation of the hot nozzle body 1 at a predetermined position on the mold 7.

[0032] In some preferred embodiments, a heating wire 3 is wound around the outer side wall of the above-mentioned hot nozzle body 1, and a collar 4 is sleeved on the hot nozzle body 1, and the collar 4 is connected to the installation portion 13. In specific applications, the collar 4 can reduce the contact area between the hot nozzle body 1 and the mold 7, thereby preventing excessive heat generated by the heating wire 3 from being transferred to the mold 7.

[0033] Specifically, an installation groove adapted to the shape of the heating wire 3 is provided on the outer side wall of the hot nozzle body 1, so as to facilitate winding the heating wire 3 around the hot nozzle body 1.

[0034] In some preferred embodiments, a convex portion 14 is provided on the outer side wall of the above-mentioned hot nozzle body 1, the length of the convex portion 14 is less than the thickness of the collar 4, and the collar 4 is sleeved on the convex portion 14. In specific applications, by providing the convex portion 14 on the outer side wall of the hot nozzle body 1 and designing the length of the convex portion 14 to be less than the thickness of the collar 4, the contact area between the collar 4 and the hot nozzle body 1 is reduced, thereby preventing excessive heat generated by the heating wire 3 from being transferred to the collar 4.

[0035] As Figure 2 and Figure 3 shown, in some preferred embodiments, an avoidance groove 41 is provided on the end face of the end of the above-mentioned collar 4 close to the mounting plate. In specific applications, by providing the avoidance groove 41 on the end face of the end of the collar 4 close to the mounting plate, the contact area between the collar 4 and the hot nozzle body 1 is further reduced, thereby further preventing excessive heat generated by the heating wire 3 from being transferred to the collar 4.

[0036] In some preferred embodiments, a stepped hole 15 is provided on the above-mentioned installation portion 13, and a blind hole 42 is provided on the collar 4. In specific applications, a bolt can be sequentially passed through the stepped hole 15 and the blind hole 42 to connect the installation portion 13 and the collar 4 together, so as to more conveniently install the hot nozzle body 1 on the mold 7.

[0037] In some preferred embodiments, the tip 2 of the nozzle is made of copper. In specific applications, by making the tip 2 of copper, not only is the thermal conductivity good, but the tip 2 penetrates the hot nozzle body 1 entirely, enabling the rubber compound to always flow within the tip 2. Compared with the prior art where the rubber compound has to flow into the hot nozzle body 1 and the tip 2 sequentially, the temperature is more stable.

[0038] In a second aspect, as Figure 4 shown, a hot runner system provided by the present utility model includes an injection nozzle 5 and a manifold 6, and further includes the hot nozzle assembly of the first aspect above.

[0039] In specific applications, the injection nozzle 5, the manifold 6, and the hot nozzle assembly are all disposed in a mold 7. The inlet of the flow channel in the manifold 6 is communicated with the injection nozzle 5, and the outlet of the flow channel in the manifold 6 is communicated with the channel 21 in the tip 2. The rubber compound ejected from the outlet of the injection molding machine flows through the injection nozzle 5, the flow channel of the manifold 6, and the channel 21 in the tip 2 in sequence and is injected into the cavity.

[0040] In summary, in one or more embodiments of the present utility model, the hot nozzle assembly and the hot runner system of the present utility model change the connection structure between the tip and the hot nozzle body, so that the tip is not easily loosened relative to the hot nozzle body when the injection pressure is too high, thereby avoiding the occurrence of glue leakage.

[0041] The above is only the embodiments of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims

1. A hot nozzle assembly, characterized in that: The invention comprises a hot nozzle body (1) and a nozzle tip (2), wherein the hot nozzle body (1) is provided with a through hole (11), the nozzle tip (2) is provided with a channel (21), one end of the nozzle tip (2) has an extension portion (22) extending outwards, and when the hot nozzle body (1) and the nozzle tip (2) are assembled together, the other end of the nozzle tip (2) passes through the through hole (11) and is exposed from the hot nozzle body (1), and the extension portion (22) abuts against one end of the hot nozzle body (1).

2. The hot nozzle assembly according to claim 1, characterized in that: A receiving groove (12) is provided on an end surface of one end of the hot nozzle body (1), and the receiving groove (12) is adapted to the shape of the extension portion (22). When the hot nozzle body (1) and the nozzle tip (2) are assembled together, the extension portion (22) is located in the receiving groove (12).

3. The hot nozzle assembly according to claim 2, characterized in that: The accommodating groove (12) is in communication with the through hole (11).

4. The hot nozzle assembly according to claim 1, characterized in that: An outer side wall at one end of the hot nozzle body (1) is provided with a mounting portion (13) extending outwards.

5. The hot nozzle assembly according to claim 4, characterized in that: A heating wire (3) is wound around the outer wall of the hot nozzle body (1), and a sleeve (4) is sleeved on the hot nozzle body (1), wherein the sleeve (4) is connected to the mounting portion (13).

6. The hot nozzle assembly according to claim 5, characterized in that: The outer side wall of the hot nozzle body (1) is provided with a convex portion (14), the length of the convex portion (14) is smaller than the thickness of the sleeve ring (4), and the sleeve ring (4) is sleeved on the convex portion (14).

7. The hot nozzle assembly according to claim 5, characterized in that: A clearance groove (41) is provided on the end surface of one end of the sleeve ring (4) close to the mounting portion (13).

8. The hot nozzle assembly according to claim 5, characterized in that: The mounting portion (13) is provided with a stepped hole (15), and the collar (4) is provided with a blind hole (42).

9. The hot nozzle assembly according to claim 5, characterized in that: The nozzle tip (2) is made of copper.

10. A hot runner system, characterized in that: The hot nozzle assembly comprises any one of claims 1 to 9.

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