Hot nozzle structure for injection mold

Abstract

The utility model relates to the field of injection molds, and discloses a hot nozzle structure for an injection mold, which comprises a mold body, the mounting sleeve is arranged in the mold body, a hot nozzle sleeve is clamped in the mounting sleeve, and a gap is formed between the mounting sleeve and the hot nozzle sleeve; the head part after the mounting sleeve and the hot nozzle sleeve are assembled extends out of the mold body, a pouring pipeline is arranged in the hot nozzle sleeve, an insert fixed through a positioning piece is arranged at the head part of the hot nozzle sleeve, and a pouring hole communicated with the pouring pipeline is formed in the insert. The hot nozzle sleeve and the insert are assembled together by adopting the positioning piece, so that the processing difficulty of the hot nozzle sleeve is greatly reduced, the processing difficulty caused by an over-deep internal glue sealing section is avoided, and meanwhile, the positioning piece can also provide an extra sealing effect to effectively prevent the glue leakage phenomenon. And the insert can be independently replaced, and the whole hot nozzle sleeve does not need to be replaced, so that the cost is saved, the operation is simple, the downtime is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, and specifically to a hot nozzle structure for injection molds. Background Technology

[0002] In injection molds, the heating nozzle is a crucial component, its function being to transfer molten plastic from the injection molding machine nozzle into the mold cavity. However, existing heating nozzle technologies have some significant drawbacks. First, the relatively long length and deep internal sealing section of the heating nozzle increase the difficulty of processing, making it prone to machining errors and resulting in leakage. Second, if the heating nozzle leaks or is damaged due to prolonged friction, the entire heating nozzle assembly needs to be replaced, which not only wastes resources but also increases processing difficulty and time costs. Utility Model Content

[0003] The purpose of this invention is to provide a hot nozzle structure for injection molds to overcome the aforementioned shortcomings in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A hot runner structure for injection molds, comprising:

[0006] Mold body;

[0007] An installation sleeve is disposed within the mold body, and a hot nozzle sleeve is engaged within the installation sleeve, with a gap formed between the installation sleeve and the hot nozzle sleeve;

[0008] The head of the mounting sleeve and the hot nozzle sleeve after assembly extends out of the mold body. The hot nozzle sleeve has a pouring pipe inside. The head of the hot nozzle sleeve has an insert fixed by a positioning element. The insert has a pouring hole communicating with the pouring pipe.

[0009] In a preferred embodiment of this utility model, the positioning element is a positioning pin, which is cylindrical or conical in shape.

[0010] As a preferred embodiment of this utility model, the inner wall of the head of the hot nozzle is provided with a step, and the insert is provided with a support platform mounted on the step.

[0011] As a preferred embodiment of this utility model, the opening where the heating nozzle sleeve and the insert meet is provided with a circular groove for assembling the positioning element. The circular groove is formed by combining an arc-shaped groove on the heating nozzle sleeve and the insert.

[0012] In a preferred embodiment of this utility model, the mounting sleeve, the hot nozzle sleeve, and the insert protrude from the head of the mold body in a flush position.

[0013] As a preferred embodiment of this utility model, a sealing ring is provided between the mounting sleeve and the hot nozzle sleeve.

[0014] In a preferred embodiment of this utility model, the gap is a water passage.

[0015] As a preferred embodiment of this utility model, the mold body is provided with a support seat for molding one end face of the injection molded product.

[0016] This invention offers the following advantages: By employing a positioning component to assemble the heating nozzle sleeve and insert together, the processing difficulty of the heating nozzle sleeve is greatly reduced, avoiding the processing challenges caused by excessively deep internal sealing sections. Simultaneously, the positioning component provides additional sealing, effectively preventing adhesive leakage. Furthermore, the insert can be replaced individually without replacing the entire heating nozzle sleeve, thus saving costs, simplifying operation, reducing downtime, and improving production efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of the mold of this utility model.

[0019] Figure 2 This is a partially enlarged structural schematic diagram of the present invention.

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

[0021] 1. Mold body; 2. Mounting sleeve; 21. Sealing ring; 3. Hot nozzle sleeve; 31. Gap; 32. Gating pipe; 4. Positioning component; 5. Insert; 51. Gating hole; 52. Support platform; 53. Step; 6. Support base; 7. Circular groove; 71. Arc groove. Detailed Implementation

[0022] 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.

[0023] See Figures 1 to 2As shown, this utility model provides a hot runner structure for injection molds, including: a mold body 1, an mounting sleeve 2 disposed within the mold body 1, a hot runner sleeve 3 fitted inside the mounting sleeve 2, and a gap 31 formed between the mounting sleeve 2 and the hot runner sleeve 3. A sealing ring 21 is provided between the mounting sleeve 2 and the hot runner sleeve 3, and the gap 31 serves as a water channel. By employing a water channel design, temperature control of the mold can be achieved, optimizing the flow of molten material within the mold, reducing flash and air bubbles during injection molding, and improving the accuracy of product molding. The sealing ring 21 effectively prevents leakage of the liquid medium, ensuring the stability and safety of the mold.

[0024] Furthermore, after the mounting sleeve 2 and the hot nozzle sleeve 3 are assembled, their heads extend out of the mold body 1. The hot nozzle sleeve 3 has an internal gating channel 32, and its head has an insert 5 fixed by a positioning element 4. The insert 5 has a gating hole 51 that communicates with the gating channel 32. This design, where the gating channel 32 inside the hot nozzle sleeve 3 communicates with the gating hole 51 in the insert 5, allows molten plastic to flow more smoothly into the mold, reducing resistance during casting and improving the quality of the molded product.

[0025] The positioning element 4 is a positioning pin, the shape of which includes, but is not limited to, cylindrical or conical. Using the positioning pin as the positioning element 4 effectively ensures the precise alignment of the hot nozzle sleeve 3 and the insert 5, preventing displacement during operation, thereby improving the stability of the injection molding process and the dimensional accuracy of the finished product. A step 53 is provided on the inner wall of the head of the hot nozzle sleeve 3, and the insert 5 is provided with a support platform 52 mounted on the step 53. The design of the step 53 on the inner wall of the head of the hot nozzle sleeve 3, combined with the support platform 52 of the insert 5, makes the insert 5 more stable during connection, reducing the risk of deformation due to high temperature or pressure. A circular groove 7 for assembling the positioning element 4 is provided at the joint opening of the hot nozzle sleeve 3 and the insert 5. This circular groove 7 is composed of an arc-shaped groove 71 on both the hot nozzle sleeve 3 and the insert 5. This not only achieves a better sealing effect, reduces leakage of molten plastic, and improves sealing performance, but the circular groove 7 and positioning pin in the design also make the assembly and disassembly of the hot nozzle sleeve 3 and the insert 5 more convenient, reducing operational difficulty and thus improving maintenance and replacement efficiency.

[0026] Furthermore, the mounting sleeve 2, the hot runner sleeve 3, and the insert 5 protrude from the head of the mold body 1 in a flush position. The mold body 1 is equipped with a support seat 6 for molding one end face of the injection-molded product. This flush design ensures more uniform contact between the hot runner sleeve 3 and the mold body 1, thereby improving the uniformity of plastic flow during injection molding, enhancing the molding accuracy of the final product, and reducing dimensional tolerances. The support seat 6 provides better support, ensuring that the molded product can accurately and stably separate from the mold after injection molding, especially in the production of complex-shaped products, effectively preventing deformation or tilting.

[0027] In this embodiment, the use of positioning element 4 to assemble the hot nozzle sleeve 3 and insert 5 together greatly reduces the processing difficulty of the hot nozzle sleeve 3, avoids the processing difficulties caused by excessively deep internal sealing sections, and at the same time, the positioning element 4 can also provide additional sealing effect, effectively preventing glue leakage. Furthermore, the insert 5 can be replaced separately without replacing the entire hot nozzle sleeve 3, thereby saving costs, simplifying operation, reducing downtime, and improving production efficiency.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hot runner structure for injection molds, characterized in that, include: Mold body; An installation sleeve is disposed within the mold body, and a hot nozzle sleeve is engaged within the installation sleeve, with a gap formed between the installation sleeve and the hot nozzle sleeve; The head of the mounting sleeve and the hot nozzle sleeve after assembly extends out of the mold body. The hot nozzle sleeve has a pouring pipe inside. The head of the hot nozzle sleeve has an insert fixed by a positioning element. The insert has a pouring hole communicating with the pouring pipe.

2. The hot runner structure for injection molds according to claim 1, characterized in that: The positioning element is a positioning pin, which is cylindrical or conical in shape.

3. The hot runner structure for injection molds according to claim 1, characterized in that: The inner wall of the head of the hot nozzle is provided with a step, and the insert is provided with a support platform mounted on the step.

4. The hot runner structure for injection molds according to claim 1, characterized in that: The opening where the heating nozzle sleeve and the insert meet is provided with a circular groove for assembling the positioning element. This circular groove is formed by combining an arc-shaped groove on the heating nozzle sleeve and the insert.

5. The hot runner structure for injection molds according to claim 1, characterized in that: The mounting sleeve, heating nozzle sleeve, and insert protrude from the head of the mold body in a flush position.

6. The hot runner structure for injection molds according to claim 1, characterized in that: A sealing ring is provided between the mounting sleeve and the hot nozzle sleeve.

7. The hot runner structure for injection molds according to claim 1, characterized in that: The gap is a waterway channel.

8. The hot runner structure for injection molds according to claim 1, characterized in that: The mold body is provided with a support base for molding one end face of the injection molded product.

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