A single-sided glue hot nozzle that can easily change color

Abstract

The utility model discloses a single-sided glue-discharging hot nozzle capable of conveniently changing colors, which is used to be installed in a mold, wherein a product cavity is provided in the mold, and the single-sided glue-discharging hot nozzle capable of conveniently changing colors comprises a hot nozzle body, and a glue-discharging structure is provided at one end of the hot nozzle body, and the glue-discharging structure comprises a glue-discharging body, and the glue-discharging body is connected to the hot nozzle body, and a plurality of nozzle tips are provided on the glue-discharging body, and glue outlets are provided at the ends of the nozzle tips, and the glue outlets are arranged opposite to each other on both sides of the product cavity, and sealing rings are sleeved on the outer side walls of the nozzle tips, and the sealing rings are in contact with the side walls of the mold. The utility model can block the flow of liquid glue to the outer side wall of the nozzle tip, avoid the formation of glue encapsulation on the outer side walls of the hot nozzle body and the nozzle tip, and reduce the area of ​​glue encapsulation, thereby shortening the time spent on mold color change and improving processing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runners, in particular to a single-side glue-discharging hot nozzle capable of conveniently changing colors. Background Art

[0002] Hot runner is a heating component system used in injection molds to inject melted plastic particles into the mold cavity. Hot runner molds are a new structure that heats the runners and sprues of traditional molds or three-plate molds, so that the runners and sprues do not need to be removed during each molding.

[0003] The hot nozzle is an important structure used at the contact position between the hot runner and the mold cavity, and is mainly used to spray the liquid rubber in the hot runner into the mold cavity. Patent application number "202010915217.0" discloses a side-feeding hot nozzle and injection molding glue feeding system. The hot nozzle adopts a double-sided glue feeding structure, which theoretically will not produce eccentricity, greatly improves the problem of eccentricity, and can also reduce product defects such as shrinkage or flashing, thereby improving the product qualification rate. However, there are still some problems with this structure; in mold design, in order to ensure the temperature of the hot nozzle, a certain installation gap is often reserved between the hot nozzle and the mold; and the above-mentioned hot nozzle structure lacks a sealing structure on the nozzle tip, so that when the hot nozzle is processed, the rubber will flow into the outer wall of the nozzle tip and the body, thereby forming a layer of rubber coating. The area of ​​the rubber coating is relatively large, and the rubber coating close to one side of the mold will solidify into non-flowing glue, resulting in a long time for the mold to change color (change the type of rubber). The actual mold color change time is more than 5 hours, which seriously affects the processing efficiency. Utility Model Content

[0004] In order to solve some or all of the problems existing in the above-mentioned prior art, the utility model provides a single-sided glue-discharging hot nozzle that can conveniently change color, which is used to be installed in a mold, and a product cavity is provided in the mold. The single-sided glue-discharging hot nozzle that can conveniently change color includes a hot nozzle body, and a glue discharging structure is provided at one end of the hot nozzle body. The glue discharging structure includes a glue discharging body, and the glue discharging body is connected to the hot nozzle body. A plurality of nozzle tips are provided on the glue discharging body, and glue outlets are provided at the ends of the nozzle tips. The glue outlets are arranged opposite to each other on both sides of the product cavity. Sealing rings are sleeved on the outer side walls of the nozzle tips, and the sealing rings abut against the side walls of the mold.

[0005] As a further improvement of the present invention, the hot nozzle body and the glue outlet body are integrally formed.

[0006] As a further improvement of the utility model, the glue dispensing body, the nozzle tip and the glue sealing ring are integrally formed.

[0007] As a further improvement of the utility model, a main flow channel is provided in the hot nozzle body, and a plurality of branch flow channels are provided on the glue outlet body. The branch flow channels are arranged in one-to-one correspondence with the nozzle tip, one end of the branch flow channel is connected to the main flow channel, and the other end is connected to the corresponding glue outlet.

[0008] As a further improvement of the present invention, the contact width between the sealing ring and the mold does not exceed 0.1 mm.

[0009] As a further improvement of the present invention, a heating component is provided on the glue discharging body, and the heating component is used to heat the glue discharging body.

[0010] As a further improvement of the present invention, the heating component includes a heating wire, and a mounting groove is provided on the glue outlet body, and the heating wire is connected to the mounting groove.

[0011] As a further improvement of the present invention, the installation grooves are distributed on the end surface of the glue outlet body in an irregular curve pattern.

[0012] As a further improvement of the utility model, the number of the nozzle tips is 8.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model sleeves a sealing ring on the outer side of the nozzle tip, and after the hot nozzle is installed in the mold, the sealing ring abuts against the side wall of the mold, so that the sealing ring can block the liquid rubber from flowing to the outer wall of the nozzle tip during processing, avoiding the formation of rubber wrapping on the outer walls of the hot nozzle body and the nozzle tip, reducing the area of ​​rubber wrapping, and thus shortening the time spent on mold color changing; according to actual measurements, by adopting the technical solution of the utility model, the mold can complete the color change processing within 1 hour, greatly shortening the color change time, thereby improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the top structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0018] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by technicians in the technical field of the present invention; the terms used in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order.

[0019] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present invention may be combined with other embodiments.

[0020] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0021] like Figure 1 , 2 As shown, a single-sided glue-discharging hot nozzle that can easily change colors is used to be installed in a mold and used to inject liquid glue into the mold. The mold is provided with a product cavity for forming products. The single-sided glue-discharging hot nozzle that can easily change colors includes a hot nozzle body 1, and a glue-discharging structure is provided at one end of the hot nozzle body 1. The glue-discharging structure includes a glue-discharging body 2, and the glue-discharging body 2 is connected to the hot nozzle body 1. A plurality of nozzle tips 3 are provided on the glue-discharging body 2, and glue outlets 4 are provided at the ends of the nozzle tips 3. The glue outlets 4 are arranged on both sides of the product cavity in pairs. The outer side walls of the nozzle tips 3 are respectively sleeved with glue sealing rings 5, and the glue sealing rings 5 ​​abut against the side walls of the mold.

[0022] Before processing, the single-sided glue-discharging hot nozzle is first installed in the mold so that the glue outlets 4 extend into both sides of the product cavity in pairs, so as to inject glue into the product cavity; and the sealing rings 5 ​​are respectively in contact with the side walls of the mold to prevent the glue from overflowing. During processing, the glue flows out from the glue outlet 4 on the nozzle tip 3 and is then injected into the product cavity; because the nozzle tip 3 is connected to the product cavity, part of the glue will flow toward the outer wall of the nozzle tip 3, and then flow into the position of the sealing ring 5, and be blocked by the sealing ring 5 to prevent the glue from continuing to flow toward the outer wall of the nozzle tip 3. By providing the sealing ring 5, the glue-coated area on the nozzle tip 3 can be greatly reduced, and the problem of glue-coating on the outer wall of the hot nozzle body 1 can be completely solved, thereby facilitating mold color change and greatly shortening the mold color change time.

[0023] In this embodiment, the hot nozzle body 1 and the glue outlet body 2 are an integrally formed structure. In other embodiments, the hot nozzle body 1 and the glue outlet body 2 can also be two independent components that can be fixed by sealing connection with screws or the like.

[0024] In this embodiment, the glue dispensing body 2, the nozzle tip 3 and the glue sealing ring 5 are integrally formed. In other embodiments, the glue dispensing body 2, the nozzle tip 3 and the glue sealing ring 5 can also be independent mechanical components, which can be sealed and fixed to each other by screws, welding, etc.

[0025] In this embodiment, there are 8 nozzle tips 3, and the corresponding number of product cavities is 4. The 8 nozzle tips 3 are symmetrically arranged in pairs on both sides of the corresponding product cavity, so that glue can be evenly introduced from both sides of the product cavity during processing, thereby ensuring the processing quality of the product.

[0026] In actual processing, the temperature of the hot nozzle is significantly higher than the temperature of the mold. In order to prevent the sealing ring 5 from dissipating heat to the mold, in this embodiment, the contact width between the sealing ring 5 and the mold is 0.1 mm. The smaller the contact area, the lower the efficiency of heat conduction. In other embodiments, the contact width between the sealing ring 5 and the mold can also be less than 0.1 mm, as long as the sealing ring 5 can be connected to the mold to block the overflow of the rubber.

[0027] A main flow channel is provided in the hot nozzle body 1, and a plurality of branch flow channels are provided on the glue outlet body 2. The branch flow channels are arranged one by one with the nozzle tip 3, one end of the branch flow channel is connected with the main flow channel, and the other end is connected with the corresponding glue outlet 4. During processing, the injection molding machine injects liquid glue into the main flow channel, and the liquid glue flows into the main flow channel, and then flows into each branch flow channel respectively, and then is injected into the corresponding product cavity through each glue outlet 4, completing the glue injection process of the mold.

[0028] In order to improve the fluidity of the liquid glue in the hot nozzle, in this embodiment, a heating component is provided on the glue outlet body 2, and the heating component is used to heat the glue outlet body 2, thereby preventing the liquid glue flowing into the glue injection body from solidifying, improving the fluidity of the liquid glue, and enabling it to be smoothly injected into the product cavity to ensure the processing quality.

[0029] Specifically, the heating assembly includes a heating wire 6, and a mounting groove 7 is provided on the glue outlet body 2. The mounting groove 7 is used to limit the installation of the heating wire 6. The heating wire 6 is connected to the mounting groove 7, and the heating wire 6 is externally connected to a power supply. When working, the heating wire 6 is energized to generate heat, so that the glue outlet body 2 can be heated, thereby ensuring the temperature of the hot nozzle, preventing the glue from solidifying in the hot nozzle, and improving the processing quality.

[0030] In this embodiment, the installation grooves 7 are distributed in an irregular curve pattern on the end surface of the glue outlet body 2. The heating wires are arranged in a one-to-one correspondence with the installation grooves 7, and the installation grooves 7 are distributed on the end surface of the glue outlet body 2 as much as possible, so that the heating wires can cover the end surface of the glue outlet body 2 as much as possible, thereby increasing the heating area, improving the heating effect, and ensuring the quality of injection molding.

[0031] The heating wire 6 can be an iron-chromium-aluminum heating wire, a nickel-chromium heating wire, or any other type of heating wire, as long as it is ensured to be able to generate heat when powered.

[0032] The above-mentioned specific implementation mode is a preferred implementation mode of the present utility model, and is not intended to limit the specific implementation scope of the present utility model. The scope of the present utility model includes but is not limited to the specific implementation mode. All equivalent changes made in accordance with the present utility model are within the protection scope of the present utility model.

Claims

1. A single-sided glue hot nozzle that can easily change color, used to be installed in a mold, the mold is provided with a product cavity, and is characterized by: The single-sided glue-discharging hot nozzle capable of convenient color change comprises a hot nozzle body, a glue-discharging structure is provided at one end of the hot nozzle body, the glue-discharging structure comprises a glue-discharging main body, the glue-discharging main body is connected to the hot nozzle body, a plurality of nozzle tips are provided on the glue-discharging main body, glue outlets are provided at the ends of the nozzle tips, the glue outlets are arranged opposite to each other on both sides of the product cavity, and sealing rings are sleeved on the outer side walls of the nozzle tips, and the sealing rings are abutted against the side walls of the mold.

2. The single-sided glue discharging hot nozzle capable of conveniently changing color according to claim 1, characterized in that: The hot nozzle body and the glue outlet body are integrally formed.

3. The single-sided glue discharging hot nozzle capable of conveniently changing color according to claim 1, characterized in that: The glue discharging body, the nozzle tip and the glue sealing ring are integrally formed.

4. The single-sided glue discharging hot nozzle capable of conveniently changing color according to claim 1, characterized in that: The hot nozzle body is provided with a main flow channel, and the glue outlet body is provided with a plurality of branch flow channels, the branch flow channels are arranged in one-to-one correspondence with the nozzle tip, one end of the branch flow channel is connected to the main flow channel, and the other end is connected to the corresponding glue outlet.

5. The single-sided glue discharging hot nozzle capable of conveniently changing color according to claim 1, characterized in that: The contact width between the sealing ring and the mold does not exceed 0.1 mm.

6. The single-sided glue discharging hot nozzle capable of conveniently changing color according to any one of claims 1 to 5, characterized in that: The glue discharging body is provided with a heating component, and the heating component is used to heat the glue discharging body.

7. The single-side glue discharging hot nozzle capable of conveniently changing color according to claim 6, characterized in that: The heating component comprises a heating wire, and a mounting groove is arranged on the glue outlet body, and the heating wire is connected to the mounting groove.

8. The single-side glue discharging hot nozzle capable of conveniently changing color according to claim 7, characterized in that: The installation grooves are distributed on the end surface of the glue outlet body in an irregular curve pattern.

9. The single-side glue discharging hot nozzle capable of conveniently changing color according to claim 6, characterized in that: The number of the nozzle tips is 8.

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