Magnetic suction cover of vacuum cup
By using titanium-steel composite sheets and laser pulse welding, the problems of complex titanium magnetic cap structure and high defect rate were solved, achieving efficient and low-cost production and stable magnetic connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG FEIJIAN IND & TRADE CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-04-24
AI Technical Summary
Existing titanium magnetic caps have complex structures, high costs, and high defect rates. Furthermore, during the high-temperature crystallization process, iron impurities seep into the titanium material, resulting in uneven crystallization and product bulging.
Titanium-steel composite sheets are used to replace iron sheets and fixing rings. The titanium layer isolates the steel layer from the titanium material. Combined with laser pulse welding and exhaust groove design, the production process is simplified and impurities are prevented from seeping in and gas expansion is avoided.
It reduced production costs and defect rates, improved product stability and production efficiency, simplified the process flow, and reduced material waste and inventory pressure.
Smart Images
Figure CN224155438U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of thermos cup technology, and in particular to a magnetic lid for a thermos cup. Background Technology
[0002] Magnetic lids are widely used in the field of thermos cup technology, including titanium and stainless steel cups. The structural principle of a magnetic lid is that an iron sheet or magnet is embedded inside the outer lid to attract the inner lid, and a corresponding magnet or iron sheet is placed on the inner lid to form a vertical or horizontal magnetic closure with the outer lid.
[0003] The existing manufacturing process for titanium magnetic caps mainly includes: first, placing an iron sheet inside the titanium retaining ring platform; second, spot welding the two components together using energy storage welding; third, placing the outer cap inside the titanium retaining ring assembly; and fourth, welding the two components together using laser pulse welding, followed by crystallization and polishing processes, and finally assembling the product. This manufacturing process involves many material components, is complex, and has numerous steps, leading to a waste of human, financial, and time resources, and indirectly causing inventory buildup in warehouses.
[0004] In the existing titanium magnetic cap structure, during the crystallization process, the iron sheet between the titanium fixing ring and the cap comes into contact with the titanium. When crystallizing in a vacuum furnace, the crystallization temperature needs to reach above 1000℃, but the softening temperature of the iron sheet is below 900℃. When the temperature in the vacuum furnace rises above 900℃, the iron sheet softens and changes its shape. At high temperatures, the iron and impurities such as carbon, chromium, and nickel on the surface of the softened iron sheet will penetrate into the titanium material, changing the material properties of the titanium itself and causing physical changes. This results in uneven crystallization particles and patchy surface brightness in the crystallized product, leading to a high product defect rate and a waste of financial and resource resources. Furthermore, below 900℃, the edges of the iron sheet soften and adhere to the titanium cap. Since the iron sheet and the titanium retaining ring are spot-welded together, the central area does not fall and adhere to the titanium cap during the softening process due to gravity, resulting in a gap between the iron sheet and the titanium cap. Above 900℃, there is a noticeable evaporation of solid impurities from the titanium surface. Because the space between the iron sheet and the titanium cap is sealed, the instantaneous expansion of the evaporated gas causes the iron sheet and titanium cap to bulge outwards, leading to product defects. Therefore, improvements are needed to address these issues. Summary of the Invention
[0005] This invention addresses the shortcomings of existing titanium magnetic caps, such as complex structure, high cost, and high defect rate, by providing a new type of magnetic cap for thermos cups.
[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0007] A magnetic lid for a thermos includes an outer lid and an inner lid. The inner lid is provided with a magnet, and the outer lid is provided with a titanium-steel composite sheet. The outer side of the titanium-steel composite sheet is a steel layer, and the inner side is a titanium layer. The titanium layer is welded to the outer lid, and the magnet cooperates with the steel layer. The outer lid and the inner lid are magnetically connected. The titanium layer is provided with an exhaust groove.
[0008] The titanium-steel composite sheet replaces the multi-component combination of "iron sheet + fixing ring" in existing technology, reducing the number of material components, simplifying production processes and operation steps, and lowering labor, financial, and time costs. It also reduces warehouse inventory and solves the resource waste problem caused by multiple components. The steel layer uses ferromagnetic steel to achieve magnetic attraction. The titanium layer isolates the steel layer from the titanium outer cover, preventing impurities such as iron, carbon, chromium, and nickel from the steel layer from seeping into the titanium material during high-temperature crystallization. This solves the problem of "iron sheet impurities altering the properties of titanium" in existing technologies, avoiding uneven crystallization particles and surface brightness spots, and preserving the original properties of titanium. The titanium layer and titanium outer cover have good welding compatibility; a stable connection can be achieved through laser pulse welding, replacing the complex process of "energy storage welding + laser welding" in existing technologies. This reduces welding steps, improves connection reliability, and avoids process errors caused by welding multiple components. The venting groove solves the problem of "the iron sheet and titanium outer cover forming a sealed space, causing gas expansion and bulging at high temperatures" in existing technologies. The exhaust vent can promptly release the expanding gas during high-temperature crystallization, preventing component bulging caused by gas expansion and thus reducing the product defect rate.
[0009] Through the above design, this utility model reduces the number of components and process steps, reduces the financial and resource waste caused by production, inventory and defective products. It also solves the problems of uneven crystallization, surface spots and bulging by isolating impurities and eliminating the risk of bulging through the titanium layer and the venting groove. This significantly reduces the product defect rate. It also simplifies the structure and process of the magnetic cover, improves production efficiency, and ensures stable magnetic attraction and higher structural reliability.
[0010] Preferably, in the above-described magnetic lid for a thermos cup, the titanium-steel composite sheet is a circular structure and is located on top of the outer lid, while the magnet is located on top of the inner lid.
[0011] The circular plate structure is more suitable for connection at the top of the outer cover, with magnets positioned in corresponding locations for engagement. This structure, combined with the blanking process, achieves near 100% material utilization.
[0012] Preferably, in the above-described magnetic lid for a thermos, the venting groove has a cross-shaped structure.
[0013] The cross-shaped structure creates multi-directional exhaust channels, radiating evenly from the center outwards. During high-temperature crystallization, expanding gases can be quickly and evenly discharged through the cross-shaped grooves, avoiding the instantaneous gas expansion and bulging problem caused by the sealed space formed by the iron sheet and titanium cap in existing technologies, thus significantly reducing product defect rates. The cross-shaped structure is highly compatible with the circular plate structure; its horizontal and vertical grooves can cover the core and edge parts of the circular plate area, ensuring that gases from different locations can be discharged through the exhaust grooves, reducing dead zones for gas stagnation. The shallow depth of the exhaust grooves ensures exhaust efficiency without weakening the overall structural strength and stability of the titanium-steel composite sheet.
[0014] Preferably, in the above-described magnetic lid for a thermos cup, the titanium-steel composite sheet is a rounded ring structure located at the top edge of the outer lid, and the magnet is located at the top edge of the inner lid.
[0015] The rounded-corner ring structure is more suitable for connection at the top edge of the outer cover, with magnets positioned accordingly for engagement. This structure, combined with the blanking process, achieves near 100% material utilization.
[0016] Preferably, in the above-described magnetic lid for a thermos, the venting groove is a multi-segmented arc structure with a ring-shaped distribution.
[0017] The multi-segmented circular arc structure is highly compatible with the rounded-corner circular ring structure. Furthermore, the circular distribution and multi-segmented arc structure ensure that the exhaust path is evenly distributed around the edge, allowing expanding gas at different locations to be quickly discharged, reducing exhaust dead zones and improving exhaust efficiency. The exhaust groove is relatively shallow, ensuring exhaust efficiency without compromising the overall structural strength and stability of the titanium-steel composite sheet.
[0018] Preferably, in the above-described magnetic lid for a thermos cup, the titanium-steel composite sheet is a cylindrical ring structure located on the side of the outer lid, and the magnet is located on the side of the inner lid.
[0019] The cylindrical ring structure is more suitable for connection at the top edge of the outer cover, with magnets positioned accordingly for engagement. This structure, combined with the blanking process, achieves near 100% material utilization.
[0020] Preferably, in the above-described magnetic lid for a thermos, the venting groove is a multi-segment parallel structure with a ring-shaped distribution.
[0021] The multi-segment parallel structure with its annular distribution is highly compatible with the cylindrical annular structure. Furthermore, the annular distribution and multi-segment parallel structure ensure that the exhaust path is evenly distributed around the side, allowing expanding gas at different locations to be quickly discharged, reducing exhaust dead zones and improving exhaust efficiency. The exhaust groove is relatively shallow, ensuring exhaust efficiency without compromising the overall structural strength and stability of the titanium-steel composite sheet.
[0022] As a preferred embodiment, a manufacturing process for a magnetic lid for a thermos includes the following steps:
[0023] S1: Take a titanium-steel composite plate, stretch the titanium-steel composite plate into shape, and obtain a titanium-steel composite sheet.
[0024] S2: Take the titanium cap, with the titanium layer of the titanium-steel composite sheet facing inward, and then perform laser pulse welding to attach the titanium-steel composite sheet to the titanium cap to obtain the outer cap;
[0025] S3: Remove the inner lid, align the position of the magnet on the inner lid with the titanium steel composite sheet, and assemble the outer lid and inner lid by magnetic attraction to obtain the magnetic lid of the thermos cup.
[0026] In step S1, titanium-steel composite plates are used to replace multiple scattered components such as "iron sheets and titanium fixing rings" in the existing technology, reducing the number of material components, lowering the risk of warehouse inventory accumulation, and simplifying the material management process. The stretch forming process can efficiently process titanium-steel composite plates, is simple to operate, and is suitable for mass production. Compared with the complex steps of "placing iron sheets inside the titanium fixing ring sinker and spot welding" in the existing technology, it significantly shortens the processing time and improves production efficiency.
[0027] In step S2, the titanium layer of the titanium-steel composite sheet adheres inward to the titanium cap. This material homogeneity ensures good compatibility, resulting in a tighter bond and higher welding strength during laser pulse welding, leading to superior structural stability of the outer cap. Furthermore, the outer cap assembly is completed in a single laser pulse welding step, compared to the two-step welding process of "energy storage spot welding + laser pulse welding" in existing technologies. This reduces welding steps, simplifies the process, lowers operational difficulty, and saves labor and time costs. The titanium layer isolates the steel layer from the titanium cap, avoiding the problem of "direct contact between iron and titanium" in existing technologies. During high-temperature crystallization, it prevents iron and impurities from penetrating the titanium material, reducing the defect rate.
[0028] In step S3, the position of the magnet corresponds to the titanium-steel composite sheet, ensuring that the outer steel layer and the inner magnet are precisely matched to form a stable magnetic closure, which is compatible with various product forms and enhances the versatility of the process.
[0029] As a preferred embodiment, in the above-described manufacturing process of a magnetic lid for a thermos cup, in step S1, after stretching and forming the titanium-steel composite sheet, the top part is removed by blanking to obtain a titanium-steel composite sheet with a circular structure. The blanked titanium-steel composite sheet is then cut to remove the rounded corner part to obtain a titanium-steel composite sheet with a rounded corner ring structure. The remaining titanium-steel composite sheet is then cut to remove the ring part to obtain a titanium-steel composite sheet with a cylindrical ring structure.
[0030] By employing a step-by-step processing method of "blanking out the top → cutting out the rounded corners → cutting out the ring," three different structures of titanium-steel composite sheets are sequentially obtained from the same titanium-steel composite plate, achieving near 100% material utilization. This completely solves the material waste problem caused by the dispersion of components in existing technologies and significantly reduces material costs. The blanking and cutting process is simple to operate, can be implemented in batches, is suitable for large-scale production, reduces process changeover time, and improves overall production efficiency.
[0031] Preferably, in the above-described manufacturing process of a magnetic lid for a thermos cup, in step S2, a titanium-steel composite sheet with a circular structure is welded to the top of the titanium lid to obtain an outer lid, and then proceeds to step S3; a titanium-steel composite sheet with a rounded ring structure is welded to the top edge of the titanium lid to obtain an outer lid, and then proceeds to step S3; a titanium-steel composite sheet with a cylindrical ring structure is welded to the side of the titanium lid to obtain an outer lid, and then proceeds to step S3.
[0032] The above steps achieve product structure diversity and adaptability. All three structures are based on laser pulse welding, requiring no additional complex equipment. The process is standardized and simple to operate, reducing worker learning costs, further minimizing material waste and process redundancy, and lowering overall production costs. Attached Figure Description
[0033] Figure 1 This is a schematic diagram of the structure of the titanium-steel composite sheet with a circular plate shape in this utility model;
[0034] Figure 2 This is a schematic diagram of the bottom view of the circular titanium-steel composite sheet of this utility model.
[0035] Figure 3 This is a schematic diagram of the structure of the titanium-steel composite sheet with a rounded-corner ring structure in this utility model;
[0036] Figure 4 This is a schematic diagram of the bottom view of the titanium-steel composite sheet with a rounded annular structure of this utility model.
[0037] Figure 5 This is a schematic diagram of the structure of the titanium-steel composite sheet with a cylindrical ring structure in this utility model;
[0038] Figure 6 This is a schematic diagram of the bottom view of the cylindrical ring structure of the titanium-steel composite sheet of this utility model.
[0039] Figure 7 This is a schematic diagram of the structure of the titanium-steel composite plate after stretching and forming according to this utility model.
[0040] Figure 8 This is a schematic diagram of the structure of a magnetic cap in existing technology;
[0041] Figure 9This is a schematic diagram of the structure of a titanium retaining ring in the prior art.
[0042] Reference numerals: Outer cover 1, Inner cover 2, Magnet 3, Titanium-steel composite sheet 4, Steel layer 5, Titanium layer 6, Exhaust groove 7, Existing structure titanium cover 100, Existing structure inner cover 200, Titanium fixing ring 300, Iron sheet 400, Existing structure magnet 500. Detailed Implementation
[0043] The following is in conjunction with the appendix Figure 1-9 The present invention will be further described in detail with reference to specific embodiments, but these are not intended to limit the present invention:
[0044] Example
[0045] A magnetic lid for a thermos includes an outer lid 1 and an inner lid 2. The inner lid 2 is provided with a magnet 3. The outer lid 1 is provided with a titanium-steel composite sheet 4. The outer side of the titanium-steel composite sheet 4 is a steel layer 5, and the inner side is a titanium layer 6. The titanium layer 6 is welded to the outer lid 1. The magnet 3 cooperates with the steel layer 5. The outer lid 1 and the inner lid 2 are magnetically connected. The titanium layer 6 is provided with an exhaust groove 7.
[0046] Preferably, the titanium-steel composite sheet 4 is a circular sheet structure and is located on top of the outer cover 1, and the magnet 3 is located on top of the inner cover 2.
[0047] Preferably, the exhaust groove 7 has a cross-shaped structure.
[0048] Preferably, the titanium-steel composite sheet 4 is a rounded ring structure and is located at the top edge of the outer cover 1, and the magnet 3 is located at the top edge of the inner cover 2.
[0049] Preferably, the exhaust groove 7 is a multi-segmented arc structure with a ring-shaped distribution.
[0050] Preferably, the titanium-steel composite sheet 4 is a cylindrical ring structure and is located on the side of the outer cover 1, and the magnet 3 is located on the side of the inner cover 2.
[0051] Preferably, the exhaust groove 7 is a multi-segment parallel structure with a ring-shaped distribution.
[0052] As a preferred embodiment, a manufacturing process for a magnetic lid for a thermos includes the following steps:
[0053] S1: Take a titanium-steel composite plate, stretch the titanium-steel composite plate into shape, and obtain titanium-steel composite sheet 4;
[0054] S2: Take the titanium cover, and place the titanium layer 6 of the titanium-steel composite sheet 4 inwards so that the titanium-steel composite sheet 4 fits the titanium cover. Then, perform laser pulse welding to obtain the outer cover 1.
[0055] S3: Take the inner cover 2, set the position of the magnet 3 of the inner cover 2 to correspond with the titanium steel composite sheet 4, so that the outer cover 1 and the inner cover 2 are assembled by magnetic attraction, and the thermos cup magnetic cover is obtained.
[0056] Preferably, in step S1, after the titanium-steel composite plate is stretched and formed, the top part is removed by blanking to obtain a titanium-steel composite sheet 4 with a circular structure. The titanium-steel composite plate after blanking is cut to remove the rounded corner part to obtain a titanium-steel composite sheet 4 with a rounded corner ring structure. The remaining titanium-steel composite plate is cut again to remove the ring part to obtain a titanium-steel composite sheet 4 with a cylindrical ring structure.
[0057] Preferably, in step S2, the titanium-steel composite sheet 4 with a circular structure is welded to the top of the titanium cover to obtain the outer cover 1, and then proceeds to step S3; the titanium-steel composite sheet 4 with a rounded ring structure is welded to the top edge of the titanium cover to obtain the outer cover 1, and then proceeds to step S3; the titanium-steel composite sheet 4 with a cylindrical ring structure is welded to the side of the titanium cover to obtain the outer cover 1, and then proceeds to step S3.
[0058] The depth of the exhaust groove is 0.1mm to 0.3mm, and can be 0.1mm, 0.2mm, or 0.3mm.
[0059] like Figures 8-9 The diagram shows the existing magnetic cover structure. The iron sheet 400 is located inside the titanium retaining ring 300 and welded together. The titanium retaining ring 300 is then welded together with the existing titanium cover 100. Finally, the existing inner cover 200 with the existing magnet 500 is assembled.
[0060] This utility model uses titanium-steel composite sheet material, which is stretched and formed, such as... Figure 7 As shown, three types of titanium-steel composite sheets 4 can be obtained, achieving a material utilization rate of nearly 100%.
[0061] like Figures 1-6 As shown, the three types of titanium-steel composite sheets 4 correspond to different welding positions, but the processes are completely identical, and the positions of magnets 3 correspond to them.
[0062] Ultimately, the goal is to achieve strong versatility in structure and process, low yield rate, high production efficiency, and low cost.
[0063] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.
Claims
1. A magnetic lid for a thermos cup, comprising an outer lid (1) and an inner lid (2), wherein the inner lid (2) is provided with a magnet (3), characterized in that: The outer cover (1) is provided with a titanium-steel composite sheet (4). The outer side of the titanium-steel composite sheet (4) is a steel layer (5), and the inner side is a titanium layer (6). The titanium layer (6) is welded to the outer cover (1). The magnet (3) cooperates with the steel layer (5). The outer cover (1) is magnetically connected to the inner cover (2). The titanium layer (6) is provided with an exhaust groove (7).
2. The magnetic lid for a thermos cup according to claim 1, characterized in that: The titanium-steel composite sheet (4) is a circular sheet structure and is located on top of the outer cover (1), while the magnet (3) is located on top of the inner cover (2).
3. The magnetic lid for a thermos cup according to claim 2, characterized in that: The exhaust groove (7) has a cross-shaped structure.
4. The magnetic lid for a thermos cup according to claim 1, characterized in that: The titanium-steel composite sheet (4) is a rounded ring structure and is located at the top edge of the outer cover (1), while the magnet (3) is located at the top edge of the inner cover (2).
5. A magnetic lid for a thermos cup according to claim 4, characterized in that: The exhaust groove (7) is a multi-segmented arc structure with a ring distribution.
6. The magnetic lid for a thermos cup according to claim 1, characterized in that: The titanium-steel composite sheet (4) is a cylindrical ring structure and is located on the side of the outer cover (1), while the magnet (3) is located on the side of the inner cover (2).
7. A magnetic lid for a thermos cup according to claim 6, characterized in that: The exhaust groove (7) is a multi-segment parallel structure with a ring distribution.