Structure for preventing glue overflow of magnetic nut insert

Abstract

The utility model relates to the technical field of injection molding production, and discloses a structure for preventing glue overflow of a magnetic nut insert, which comprises an insert pin, and the upper end of the insert pin is connected to a fixing nut through an adapter and is fixed in the insert pin through a positioning pin; a high-temperature-resistant magnet is mounted in the adapter and is used for adsorbing the magnetic nut insert; an iron sheet is arranged at the top end of the high-temperature-resistant magnet so as to enhance the magnetic attraction force; a spring gasket is arranged between the high-temperature-resistant magnet and the fixing nut and used for providing elastic buffering. And the insert pin and the fixing nut are externally coated with a rubber spacer bush which is used for isolating excessive glue generated in the injection molding process. According to the utility model, through the matching design of the high-temperature-resistant magnets and the iron sheets, strong magnetic adsorption force is provided, and the spring washers and anti-skid groove auxiliary structures are combined, so that the phenomenon of glue overflow caused by displacement of the insert in the injection molding process is effectively solved, and the position stability of the nut insert in an injection molding environment is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding production, in particular to a structure for preventing glue overflow from magnetic nut inserts. Background Art

[0002] During the injection molding process, magnetic nut inserts need to be precisely fixed in place to ensure their functionality and appearance quality after integration with plastic components. However, if the exposed surface of the nut insert is covered by plastic, it may cause functional failure and even prevent the insert from achieving the expected mechanical properties during use. Therefore, how to effectively fix the magnetic nut insert and prevent the plastic from overflowing and covering its exposed surface has become a pressing issue in current injection molding production.

[0003] In the prior art, an interference fit method is usually adopted to achieve the positioning and fixation of the insert by fixing the bottom hole of the nut insert on the limit pin. However, the interference fit method has extremely strict tolerance requirements, especially when the tolerance value of the bottom hole of the nut insert is within 0.2mm. Any deviation will significantly affect the fixing effect. If the tolerance of the bottom hole of the nut is at the upper limit (that is, the size is too large), the insert cannot fit tightly with the limit pin, resulting in plastic infiltration into the surface of the insert during the injection molding process, forming glue overflow, affecting the appearance and function of the finished product; on the contrary, if the tolerance is at the lower limit (that is, the size is too small), an overly tight fit will damage the threaded structure of the insert, making it unable to be used normally in subsequent assembly, reducing the durability of the insert. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a structure for preventing glue overflow from the magnetic nut insert, aiming to improve the problem that the insert cannot fit tightly with the limit pin, thereby causing plastic to penetrate into the insert surface during the injection molding process and cause glue overflow.

[0005] In order to achieve the above-mentioned object, the utility model adopts the following technical solution: a structure for preventing glue overflow from a magnetic nut insert, comprising an insert pin, the upper end of which is connected to a fixing nut via an adapter and fixed inside the insert pin via a locating pin;

[0006] A high-temperature resistant magnet is installed inside the adapter to attract the magnetic nut insert;

[0007] An iron sheet is provided on the top of the high temperature resistant magnet to enhance the magnetic attraction;

[0008] A spring washer is provided between the high temperature resistant magnet and the fixing nut to provide elastic buffering;

[0009] The outside of the insert pin and the fixing nut is covered with a rubber spacer for isolating the overflowing glue generated during the injection molding process.

[0010] As a further description of the above technical solution:

[0011] The spring washer is provided with a plurality of anti-slip grooves inside to increase the friction between the nut and the injection mold and avoid displacement of the nut insert during the injection molding process.

[0012] As a further description of the above technical solution:

[0013] The upper end of the fixing nut is connected with a handle, which is convenient for quickly removing the nut insert after the injection molding is completed.

[0014] As a further description of the above technical solution:

[0015] The outer side of the insert pin is provided with a plurality of limiting grooves for limiting the axial movement of the nut insert during the injection molding process.

[0016] As a further description of the above technical solution:

[0017] The adapter is made of non-magnetic material to reduce the impact on the adsorption force of the high-temperature resistant magnet.

[0018] As a further description of the above technical solution:

[0019] The rubber spacer is detachable for easy cleaning and maintenance.

[0020] As a further description of the above technical solution:

[0021] The iron sheet is annular in structure and covers the outer edge of the top of the high temperature resistant magnet to further enhance the magnetic adsorption effect.

[0022] As a further description of the above technical solution:

[0023] The spring washer can be fine-tuned according to the installation depth of the nut insert to adapt to nut inserts of different specifications.

[0024] The utility model has the following beneficial effects:

[0025] 1. In the utility model, firstly, a strong magnetic adsorption force is provided by the coordinated design of high-temperature resistant magnets and iron sheets. Combined with the spring gasket and anti-slip groove auxiliary structure, the problem of glue overflow caused by insert displacement during the injection molding process is effectively solved, ensuring the position stability of the nut insert in the injection molding environment and greatly improving the yield rate in the production process.

[0026] 2. In the utility model, the elastic buffer provided by the spring washer and the overflow glue isolation protection provided by the rubber spacer effectively reduce the stress concentration during the injection molding process and the damage to the thread caused by high temperature, prevent the damage to the insert thread, significantly enhance the adaptability of the insert in the high-pressure injection molding process, and extend the service life of the insert and the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a three-dimensional diagram of the structure for preventing glue overflow from magnetic nut inserts proposed by the present invention;

[0028] Figure 2 This is a schematic diagram of the nut structure of the structure for preventing glue overflow from magnetic nut inserts proposed by the present invention;

[0029] Figure 3 This is a cross-sectional view of the structure proposed by the present invention for preventing glue overflow from magnetic nut inserts.

[0030] Legend:

[0031] 1. Insert pin; 2. Adapter; 3. High-temperature resistant magnet; 4. Fixing nut; 5. Positioning pin; 6. Handle; 7. Spring washer; 8. Anti-slip groove; 9. Iron sheet; 10. Rubber spacer. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Reference Figure 1-Figure 3 The present invention provides an embodiment of a structure for preventing glue overflow from a magnetic nut insert, comprising an insert pin 1, the upper end of which is connected to a fixing nut 4 via an adapter 2 and fixed inside the insert pin 1 via a positioning pin 5;

[0034] A high-temperature resistant magnet 3 is installed inside the adapter 2 to attract the magnetic nut insert;

[0035] An iron sheet 9 is provided on the top of the high temperature resistant magnet 3 to enhance the magnetic attraction;

[0036] A spring washer 7 is provided between the high temperature resistant magnet 3 and the fixing nut 4 to provide elastic buffering;

[0037] The outside of the insert pin 1 and the fixing nut 4 is covered with a rubber spacer 10 to isolate the overflow of glue generated during the injection molding process;

[0038] Specifically, support is provided by the inlay pin 1, and the upper end thereof is connected to the fixing nut 4 by the adapter 2. The internal positioning pin 5 further enhances the structural stability to cope with the high-pressure environment during the injection molding process. The adapter 2 is equipped with a high-temperature resistant magnet 3 inside. The magnet firmly holds the magnetic nut insert in the proper position through strong adsorption, avoiding displacement or deviation caused by material flow and external force during the injection molding process, ensuring the accuracy of the insert during molding. The iron sheet 9 on the top of the high-temperature resistant magnet 3 further enhances the magnetic attraction effect, evenly distributes the magnetic field, makes the adsorption force more stable and reliable, and reduces the loosening or displacement of the insert caused by insufficient magnetism. A spring gasket 7 is provided between the high-temperature resistant magnet 3 and the fixing nut 4. The spring washer 7 provides elastic buffering during the injection molding process, protecting the insert and its threaded structure from damage by absorbing part of the impact force, while enhancing the convenience of removal. The rubber spacer 10 wrapped around the insert pin 1 and the fixing nut 4 is used to isolate the overflow glue generated during the injection molding process. The spacer not only prevents the overflow glue from affecting the appearance of the insert, but also provides effective protection to ensure that the insert is not contaminated or disturbed during the operation and assembly process after injection molding. The flexible material of the rubber spacer 10 also provides a certain buffering function in a high-pressure environment, which helps to extend the service life of the insert and the mold, improve the overall durability and reliability of the structure, further reduce the defective rate and reduce the maintenance frequency, and significantly improve production efficiency and finished product quality.

[0039] Reference Figure 1-Figure 3 , the interior of the spring washer 7 is provided with multiple anti-slip grooves 8 to increase the friction between the nut and the injection mold and avoid the displacement of the nut insert during the injection molding process. The upper end of the fixed nut 4 is connected with a handle 6 to facilitate the quick removal of the nut insert after the injection molding is completed. The outside of the inlay pin 1 has multiple limiting grooves for limiting the axial movement of the nut insert during the injection molding process. The adapter 2 is made of non-magnetic material to reduce the impact on the adsorption force of the high-temperature resistant magnet 3. The rubber spacer 10 is detachable for easy cleaning and maintenance. The iron sheet 9 is annular in structure, covering the outer edge of the top of the high-temperature resistant magnet 3 to further enhance the magnetic adsorption effect. The spring washer 7 can be fine-tuned according to the installation depth of the nut insert to adapt to nut inserts of different specifications;

[0040] Specifically, the interior of the spring washer 7 is designed with multiple anti-slip grooves 8. These grooves increase the friction between the nut and the injection mold, effectively preventing the displacement of the nut insert caused by the flow of high-pressure materials during the injection molding process, thereby ensuring that the insert maintains accurate positioning during injection molding and avoiding the impact of offset on the quality of the finished product. The upper end of the fixed nut 4 is equipped with a handle 6, which is convenient for the operator to quickly remove the nut insert after the injection molding process is completed, significantly improving the operating efficiency and convenience of the production line, while reducing the need for tool assistance, making the overall process smoother and more efficient. The outer side of the inlay pin 1 is provided with multiple limit grooves. The design of these limit grooves effectively limits the axial displacement of the nut insert during the injection molding process, ensures the stability of the insert in a high-temperature and high-pressure environment, and further improves the consistency and precision of the product. To avoid magnetic field interference, the adapter 2 is made of non-magnetic material, thereby ensuring that the high-temperature resistant magnet 3 is not affected by the material during the adsorption process, providing continuous and strong adsorption force, and ensuring that the insert fits firmly in the set position. In addition, the rubber spacer 10 is designed as a detachable structure, so that it can be easily disassembled for cleaning and maintenance in the later stage of production, preventing the performance of the spacer from being affected by accumulated glue overflow or contaminants, thereby extending the service life and reliability of the structure.

[0041] Working principle: First, the insert pin 1 provides an overall support base, and its upper end is connected to the fixed nut 4 through the adapter 2. Under the action of the high-temperature resistant magnet 3, the magnetic nut insert is firmly adsorbed in the appropriate position. Since the top of the high-temperature resistant magnet 3 is provided with an iron sheet 9, it can enhance the magnetic attraction and ensure that the nut insert will not shift due to pressure during the injection molding process. The spring gasket 7 is located between the high-temperature resistant magnet 3 and the fixed nut 4, providing elastic buffering to prevent excessive pressure from directly acting on the nut insert, thereby protecting the integrity of its threaded structure; the rubber spacer 10 is covered on the outside of the insert pin 1 and the fixed nut 4 to isolate the overflow glue generated during the injection molding process and prevent the overflow glue from penetrating into the outer surface of the nut insert, ensuring its appearance and functionality are not damaged. ; When the injection molding is completed, the handle 6 can be used to quickly remove the fixing nut 4 and the insert pin 1 as a whole, which is convenient for the operator to efficiently replace the insert or mold; the spring gasket 7 is provided with a plurality of anti-slip grooves 8 inside, which increase the friction between the fixing nut 4 and the injection mold, and further prevent the insert from accidentally sliding during the injection molding process; in addition, the outer side of the insert pin 1 has a plurality of limit grooves for limiting the axial movement of the nut insert during the injection molding process, thereby ensuring the precise and stable position of the insert; at the same time, the adapter 2 is made of non-magnetic material to avoid its interference with the adsorption effect of the high-temperature resistant magnet 3, thereby improving the effectiveness of the magnet adsorption force; the rubber spacer 10 in the structure is designed to be detachable, which is convenient for cleaning and maintenance after production.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A structure for preventing glue overflow from a magnetic nut insert, comprising an insert pin (1), characterized in that: The upper end of the insert pin (1) is connected to the fixing nut (4) via the adapter (2) and is fixed inside the insert pin (1) via the positioning pin (5); A high-temperature resistant magnet (3) is installed inside the adapter (2) for adsorbing the magnetic nut insert; An iron sheet (9) is provided at the top of the high-temperature resistant magnet (3) to enhance the magnetic attraction; A spring washer (7) is provided between the high-temperature resistant magnet (3) and the fixing nut (4) to provide elastic buffering; The insert pin (1) and the fixing nut (4) are externally covered with a rubber spacer (10) for isolating overflow glue generated during the injection molding process.

2. The structure for preventing glue overflow from magnetic nut inserts according to claim 1, characterized in that: The spring washer (7) is provided with a plurality of anti-slip grooves (8) inside to increase the friction between the nut and the injection mold, thereby preventing displacement of the nut insert during the injection molding process.

3. The structure for preventing glue overflow from magnetic nut inserts according to claim 1, characterized in that: The upper end of the fixing nut (4) is connected to a handle (6) to facilitate quick removal of the nut insert after injection molding is completed.

4. The structure for preventing glue overflow from magnetic nut inserts according to claim 1, characterized in that: The outer side of the insert pin (1) is provided with a plurality of limiting grooves for limiting the axial movement of the nut insert during the injection molding process.

5. The structure for preventing glue overflow from magnetic nut inserts according to claim 1, characterized in that: The adapter (2) is made of non-magnetic material to reduce the impact on the adsorption force of the high-temperature resistant magnet (3).

6. The structure for preventing glue overflow from magnetic nut inserts according to claim 1, characterized in that: The rubber spacer (10) is detachable, which is convenient for cleaning and maintenance.

7. The structure for preventing glue overflow from magnetic nut inserts according to claim 1, characterized in that: The iron sheet (9) is an annular structure, covering the outer edge of the top of the high-temperature resistant magnet (3) to further enhance the magnetic adsorption effect.

8. The structure for preventing glue overflow from magnetic nut inserts according to claim 1, characterized in that: The spring washer (7) can be fine-tuned according to the installation depth of the nut insert to adapt to nut inserts of different specifications.

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