Airtight small inner box with in-mold injection molding screen cloth ring

Abstract

The utility model belongs to the technical field of packaging containers, and particularly relates to an airtight small inner box with an in-mold injection molding screen cloth ring, which consists of a double-color inner cover, an inner bottom and the in-mold injection molding screen cloth ring, and a TPE (thermoplastic elastomer) sealing ring of the double-color inner cover interferes with the inner bottom to generate airtightness. And the in-mold injection molding screen cloth ring hot aluminum foil seal is pressed into the inner bottom after filling to form a second seal. Compared with the previous generation of products, the screen cloth fusion mode is changed from ultrasonic wave to intramode injection molding (IMD), so that the adhesion degree of the screen cloth base material and the injection molding piece is better, the positioning precision is higher, and the product quality is improved; and meanwhile, an ultrasonic jig and accessories are omitted, the assembly procedures and personnel are reduced, the production efficiency is improved, and the production cost is reduced. The airtight small powder box effectively solves the problems of quality and cost of a traditional airtight small powder box, and has high market application value.

Description

Technical Field

[0001] This utility model belongs to the field of packaging container technology, specifically relating to an airtight small inner box with an in-mold injection molded mesh ring. Background Technology

[0002] In the packaging industry, the airtightness of packaging containers is crucial for items that require stable internal product quality and protection from external factors, such as powder products in cosmetics and pharmaceuticals. Traditional airtight powder boxes and similar products have limitations in their fusion methods of mesh fabric and injection molding rings. For example, previous generations used ultrasonic fusion of the mesh fabric and injection molding ring. While this method achieved the connection, it presented several problems. From a quality perspective, the adhesion and strength between the mesh fabric substrate and the injection molded part are limited. With prolonged use or under certain external forces, the mesh fabric may separate from the injection molded part, affecting the product's sealing performance and overall quality. Furthermore, the positioning accuracy of ultrasonic fusion is relatively low, resulting in poor product quality stability and potential differences between batches. From a cost perspective, ultrasonic fusion requires customized ultrasonic fixtures and accessories, increasing equipment costs. The complex assembly process also requires significant manual labor, leading to low production efficiency and high production costs. These issues limit the market competitiveness of airtight powder boxes and similar products, necessitating improvements. Utility Model Content

[0003] To address the problems mentioned in the background section, this invention provides an airtight small inner box with an in-mold injection-molded mesh ring. This solves the quality and cost issues associated with traditional airtight powder boxes in terms of mesh integration methods, improving the product's airtightness and quality stability while reducing production costs.

[0004] An airtight inner box with an in-mold injection-molded mesh ring is disclosed. The airtight inner box consists of three parts: a two-color inner lid, an inner bottom, and the in-mold injection-molded mesh ring. The two-color inner lid is made of a single-color PP cap and a TPE sealing ring through two-color injection molding. The airtight effect is achieved by utilizing the elasticity of the TPE sealing ring and its interference with the inner bottom. The in-mold injection-molded mesh ring is made of a PP ring and nylon mesh fabric through an in-mold injection molding process, and then sealed with aluminum foil to further enhance the sealing performance.

[0005] During assembly, the two-tone inner cover and inner bottom are first fastened together by the rear button hinge. After the cover is closed, the front button is secured by three fastening points, and the front button can be repeatedly opened and closed. The rear button hinge can be rotated to open and close, making it convenient for users. After filling with the contents, the in-mold injection-molded mesh ring is pressed into the inner bottom, forming a second sealing barrier through annular interference and aluminum foil, ensuring the high airtightness of the inner box.

[0006] Compared to the ultrasonic fusion of mesh and injection ring used in the previous generation, this invention employs in-mold injection molding (IMD). In this process, a robotic arm places the mesh into a mold, where a negative pressure vacuum device adheres the mesh, and then the injection molding process is completed, fusing the mesh and the injection-molded part into a single component.

[0007] Compared with the prior art, the beneficial effects of this utility model are:

[0008] Quality Improvement: The mesh substrate and injection molded parts are fully integrated, resulting in better adhesion and bonding strength. This reduces the risk of separation between the mesh and the injection molded parts, and improves the product's sealing performance and durability. High mold positioning accuracy significantly improves product quality stability and enhances consistency between different batches of products.

[0009] Cost reduction: Eliminating the need for customized ultrasonic fixtures and accessories reduces assembly steps and personnel. Utilizing an injection molding machine to assist a robotic arm in placing the mesh effectively lowers production costs. In-mold injection (IMD) can produce one mold of products (8 or 16 pieces) at a time, significantly increasing production efficiency compared to an ultrasonic pen device that can only ultrasonicate one product at a time, further reducing the unit production cost. Attached Figure Description

[0010] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0011] Figure 1 This is a diagram of the mesh structure of this utility model;

[0012] Figure 2 This is an enlarged view of the mesh layout of this utility model;

[0013] Figure 3 This is a schematic diagram of the PP ring structure after in-mold injection molding of the mesh fabric according to this utility model;

[0014] Figure 4 This is a partial enlarged view of the PP ring after in-mold injection molding of the mesh fabric according to this utility model;

[0015] Figure 5 This is a schematic diagram of the inner injection-molded mesh + aluminum foil sealing structure of this utility model;

[0016] Figure 6 This is a partial enlarged view of the in-mold injection molding mesh and aluminum foil sealing of this utility model;

[0017] Figure 7 This is a schematic diagram of the assembly inner box structure of this utility model;

[0018] Figure 8This is a partial enlarged view of the assembled inner box of this utility model;

[0019] In the picture:

[0020] 1. Telescopic pole; 2. Disassembly assembly; 3. Net head; 4. Mounting base; 5. Arm support; 6. Handle; 21. Insert post; 22. Slot; 23. Fixing mechanism; 211. Limiting groove; 231. Column cavity; 232. Slide plate; 233. Limiting head; 234. Pull rod; 235. Spring. Detailed Implementation

[0021] 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. Example

[0022] like Figure 1-7 As shown;

[0023] A small, airtight inner box with an in-mold injection-molded mesh ring.

[0024] This implementation plan addresses the technical problems existing in the prior art, such as those disclosed in the background section above: "In the packaging field, for items that need to maintain stable internal product quality and prevent external factors from affecting them, such as powder products in cosmetics and pharmaceuticals, the airtightness of the packaging container is crucial. Traditional airtight powder boxes and similar products have certain limitations in the fusion method of the mesh fabric and injection molding ring. For example, the previous generation of products used ultrasonic fusion of the mesh fabric and injection molding ring. Although this method can achieve the connection between the two, it has many problems. From a quality perspective, the adhesion and firmness between the mesh fabric substrate and the injection molded part are limited, and they will deteriorate with long-term use or under certain external forces." This can lead to separation between the mesh fabric and the injection-molded part, affecting the product's sealing performance and overall quality. Furthermore, the relatively low positioning accuracy of ultrasonic fusion results in poor product quality stability, potentially causing variations between different batches. From a cost perspective, ultrasonic fusion requires customized ultrasonic fixtures and accessories, increasing equipment costs. Moreover, the complex assembly process requires significant manual labor, leading to low production efficiency and persistently high production costs. Considering practical application, this problem is clearly a real and difficult-to-solve issue. Therefore, to address this technical problem, a small, airtight inner box with an in-mold injection-molded mesh fabric ring is provided.

[0025] like Figure 1-7 As shown in the figure;

[0026] Based on the above, the product includes a two-color inner cover, an inner bottom, and an in-mold injection-molded mesh ring. The two-color inner cover is made of a single-color PP cap and a TPE sealing ring through two-color injection molding. The in-mold injection-molded mesh ring is made of a PP ring and a nylon mesh fabric through in-mold injection molding and is sealed with hot-stamped aluminum foil.

[0027] The two-tone inner cover and inner bottom are fastened together by a rear button hinge, and the front button is fastened by three snap points after the cover is closed.

[0028] The TPE sealing ring of the inner cover interferes with the inner bottom to create an airtight seal.

[0029] After the contents are filled, the in-mold injection mesh ring is pressed into the inner bottom, forming a second seal through annular interference and aluminum foil.

[0030] The manufacturing process of the in-mold injection molding mesh ring is as follows: a robotic arm is used to put the nylon mesh into the mold, the negative pressure vacuum device of the mold adsorbs the nylon mesh, and then PP material is injected to complete the injection molding action, so that the nylon mesh and PP ring are fused into a single component.

[0031] The front button can be repeatedly opened and closed, while the rear button hinge can be rotated to open and close.

[0032] Component fabrication:

[0033] Two-color inner cover manufacturing: A two-color injection molding process is adopted. First, a PP one-color cover is injection molded, and then a TPE sealing ring is injection molded at a specific position to form a two-color inner cover, ensuring the dimensional accuracy and sealing performance of the TPE sealing ring.

[0034] In-mold injection molding of the mesh ring: The nylon mesh is cut to the design requirements and accurately placed into the mold using a robotic arm. The mold's negative pressure vacuum device is activated to adhere the mesh and fix it in the correct position. Then, PP material is injected into the mold for injection molding, allowing the PP ring to fuse tightly with the nylon mesh, forming the in-mold injection molded mesh ring. After injection molding, the mesh ring is sealed with hot-applied aluminum foil to ensure a tight fit between the aluminum foil and the mesh ring, achieving a good sealing effect.

[0035] Small inner box assembly:

[0036] First, assemble the two-tone inner cover and inner bottom by fastening them together with the rear button hinge, ensuring that the hinge connection is firm and can rotate and open normally.

[0037] After closing the lid, accurately fasten the three latches on the front button, check the stability of the fastening, and ensure that the front button can be opened and closed repeatedly.

[0038] After filling the contents, align the in-mold injection mesh ring with the corresponding position on the inner bottom and press it into the inner bottom evenly to ensure tight ring interference and proper aluminum foil sealing, forming a reliable second seal.

[0039] Quality Inspection: After assembly, the airtightness of the inner box is tested using methods such as pressure testing to ensure that the product's airtightness meets relevant standards. Simultaneously, the fit between the two-color inner cover and the inner bottom, the installation of the in-mold injection molding mesh ring, and the appearance quality of each component are checked. Any defects are promptly repaired or the component is scrapped.

[0040] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A small, airtight inner box with an in-mold injection-molded mesh ring, characterized in that, It includes a two-color inner cover, an inner bottom, and an in-mold injection-molded mesh ring; the two-color inner cover is made of a single-color PP cap and a TPE sealing ring through two-color injection molding, and the in-mold injection-molded mesh ring is made of a PP ring and a nylon mesh through in-mold injection molding and sealed with hot-stamped aluminum foil.

2. The airtight inner box with an in-mold injection-molded mesh ring according to claim 1, characterized in that, The two-tone inner cover and inner bottom are fastened together by a rear button hinge, and the front button is fastened by three fastening points after the cover is closed.

3. The airtight inner box with an in-mold injection-molded mesh ring according to claim 1, characterized in that: The TPE sealing ring of the inner cover interferes with the inner bottom to create an airtight seal.

4. The airtight inner box with an in-mold injection-molded mesh ring according to claim 1, characterized in that: The in-mold injection molding mesh ring is pressed into the inner bottom after the contents are filled, forming a second seal through annular interference and aluminum foil.

5. A small, airtight inner box with an in-mold injection-molded mesh ring according to claim 1, characterized in that: The manufacturing process of the in-mold injection molding mesh ring is as follows: a robotic arm is used to put the nylon mesh into the mold, the negative pressure vacuum device of the mold adsorbs the nylon mesh, and then PP material is injected to complete the injection molding action, so that the nylon mesh and PP ring are fused into a single component.

6. A small, airtight inner box with an in-mold injection-molded mesh ring according to claim 1, characterized in that: The front button can be repeatedly opened and closed, and the rear button hinge can be rotated open and closed.

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