Inflating valve cap with mark and manufacturing method thereof

Abstract

The invention relates to the technical field of automobile parts, in particular to an inflating valve cap with a mark and a manufacturing method of the inflating valve cap. The inflating valve cap with the mark comprises a cap body, wherein the cap body is provided with a cap top; the cap top is provided with an anti-falling groove used for containing a mark, and the edge of the anti-falling groove is provided with an exhaust structure communicated with the outside. The anti-falling groove is filled with a packaging layer, and the mark is fixed in the anti-falling groove through the packaging layer; according to the inflating valve cap with the mark, the mark can be fixed reliably, and falling can be avoided or reduced.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, specifically to a valve cap with markings and its manufacturing method. Background Technology

[0002] The valve cap is an important component installed on the tire valve stem to maintain the tire's airtightness.

[0003] In existing technologies, the markings on valve caps are typically fixed with adhesive, which is prone to detachment. Especially during long-term use, factors such as changes in ambient temperature, mechanical vibration, and material aging gradually weaken the bond between the markings and the cap, causing them to fall off and affecting the product's appearance and lifespan. Although the industry has attempted to address this issue by improving adhesives or adding fixing structures, the results have been unsatisfactory, with defects such as insecure fixing and the formation of air bubbles remaining. Summary of the Invention

[0004] The present invention provides a valve stem cap with markings and a method for manufacturing the same. The markings on the valve stem cap are reliably fixed and can prevent or reduce detachment.

[0005] The present invention provides a valve cap with markings, including a cap body having a cap top; The top of the cap is provided with a groove for accommodating the label to prevent it from falling off, and the edge of the groove is provided with a venting structure that communicates with the outside. The anti-detachment groove is filled with an encapsulation layer, and the mark is fixed in the anti-detachment groove through the encapsulation layer.

[0006] As an optional embodiment of the present invention, the exhaust structure is an overflow groove, which is arranged circumferentially around the anti-detachment groove.

[0007] As an optional embodiment of the present invention, the overflow groove has a depth of 0.1-1 mm and a width of 0.2-2 mm.

[0008] As an optional embodiment of the present invention, the sidewall of the anti-detachment groove is provided with a pull-out structure or an anti-detachment structure.

[0009] As an optional embodiment of the present invention, the reverse pull structure is an inverted cone shape.

[0010] As an optional embodiment of the present invention, the angle between the sidewall and the bottom surface of the reverse-pull structure is less than 90 degrees.

[0011] As an optional embodiment of the present invention, the outer surface shape of the encapsulation layer is planar or convex.

[0012] As an optional embodiment of the present invention, the outer wall of the cap is provided with an anti-slip structure.

[0013] As an optional embodiment of the present invention, the anti-slip structure is a lateral anti-slip groove of a plastic cap or a longitudinal hexagonal anti-slip surface of a metal cap.

[0014] As an optional embodiment of the present invention, the cap body is integrally formed by injection molding when it is made of plastic, and formed by CNC machining when it is made of metal.

[0015] The present invention also provides a method for manufacturing a valve cap with markings, comprising the following steps: A valve cap is provided, on the top of the valve cap, an anti-detachment groove is formed and an exhaust structure communicating with the anti-detachment groove; The mark is placed inside the anti-detachment groove; Liquid encapsulation material is filled into the marked anti-detachment groove, and the gas in the anti-detachment groove is discharged through the venting structure; The encapsulation material is cured to form an encapsulation layer, thereby fixing the mark within the anti-detachment groove.

[0016] As an optional embodiment of the present invention, the filling step adopts a drip molding, injection molding or dispensing process.

[0017] As an optional embodiment of the present invention, the drip molding process includes setting the speed, angle, dispensing nozzle, and closing point parameters of the drip molding spray gun.

[0018] As an optional embodiment of the present invention, the filling step is carried out in a preset clean environment, with the ambient temperature controlled at 15-30℃ and the humidity controlled at 30%-70%.

[0019] As an optional embodiment of the present invention, the curing step is natural curing, heat curing or ultraviolet light curing.

[0020] As an optional embodiment of the present invention, the valve cap is made of at least one of plastic, metal or composite material.

[0021] As an optional embodiment of the present invention, the encapsulation material is at least one of polyurethane resin and acrylic resin.

[0022] As an optional embodiment of the present invention, the marking is an ink-printed sticker or other marking.

[0023] The beneficial effects of this invention: This invention proposes a valve cap with markings and its manufacturing method. Through the combination of an anti-detachment groove, a venting structure, and a sealing layer, reliable marking fixation is achieved. The anti-detachment groove provides a stable space for the marking, the venting structure ensures effective venting during sealing layer filling, preventing air bubbles, and the sealing layer firmly bonds the marking to the inner wall of the anti-detachment groove. This structural design not only improves the fixing strength of the markings but also enhances the product's durability, effectively resisting the effects of environmental factors and mechanical vibrations, maintaining long-term stable and reliable markings. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0025] In the attached diagram: Figure 1 This is a schematic diagram of a valve cap structure with markings provided in an embodiment of the present invention; Figure 2 for Figure 1 Top view; Figure 3 This is a schematic diagram of a valve cap structure with markings provided in another embodiment of the present invention; Figure 4 yes Figure 3 Structural diagram; Figure 5 This is a flowchart of a method for manufacturing a valve cap with markings according to an embodiment of the present invention; The attached figures are labeled as follows: cap body 10, anti-slip structure 101, cap top 1, anti-slip groove 11, marking 2, venting structure 12, sealing layer 13, convex surface 131. Detailed Implementation

[0026] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0027] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0028] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.

[0029] like Figure 1-2 or Figure 3-4 As shown, the present invention provides a valve cap with markings, including a cap body 10, wherein the cap body 10 has a cap top 1; The cap top 1 is provided with a non-detachment groove 11 for accommodating the mark 2, and the edge of the non-detachment groove 11 is provided with an exhaust structure 12 that communicates with the outside. The anti-detachment groove 11 is filled with an encapsulation layer 13, and the mark 2 is fixed in the anti-detachment groove 11 by the encapsulation layer 13.

[0030] It should be noted that the cap body 10 is typically made of plastic or metal, for example, through injection molding or machining, to suit different application scenarios. The anti-detachment groove 11 provides a stable receiving space for the label 2. Its shape can be designed as circular, rectangular, or other geometric shapes according to the label 2. The depth and width of the groove can be adjusted according to the size of the label 2 to ensure that the label 2 can be fully embedded and mechanically restrained. The sidewalls of the anti-detachment groove 11 can be further provided with anti-pull-out structures, such as inverted conical or stepped designs, to enhance the anti-detachment effect of the label 2. The angle of the anti-pull-out structure can be in the range of 80 to 89 degrees. By increasing the sidewall inclination or stepped drop, a mechanical locking is formed on the label 2, preventing it from shifting or falling off under external stress.

[0031] A venting structure 12 communicating with the outside is provided at the edge of the anti-detachment groove 11. This structure is used to expel air from the groove during the filling of the encapsulation material, preventing the formation of air bubbles. Specific embodiments of the venting structure 12 include an overflow groove 121 or a vent hole, with the overflow groove 121 being the preferred option. It is arranged circumferentially around the anti-detachment groove 11, for example, with a depth of 0.1 mm to 1 mm and a width of 0.2 mm to 2 mm, to ensure smooth gas discharge without affecting the integrity of the encapsulation layer 13. The design of the venting structure 12 not only improves the reliability of the encapsulation process but also reduces adhesion weakening caused by air bubbles, thereby enhancing the fixation strength.

[0032] The encapsulation layer 13 is formed of a curable material, such as epoxy resin, polyurethane resin, or acrylic resin. This material fills the groove in a liquid state and forms a solid layer through natural or controlled curing. The encapsulation layer 13 is tightly bonded to the mark 2 and the inner wall of the anti-detachment groove 11, achieving a dual fixing effect of chemical adhesion and mechanical interlocking. The outer surface of the encapsulation layer 13 can be formed as a flat surface or a convex surface 131 to meet different aesthetic requirements. The convex surface 131 design can also visually enlarge the pattern of the mark 2.

[0033] This invention achieves reliable fixation of the marking 2 through the aforementioned structure. The anti-detachment groove 11 provides mechanical constraint for the marking 2, preventing its lateral movement; the venting structure 12 ensures the tightness of the sealing layer 13 during filling, avoiding adhesion failure caused by air bubbles; the sealing layer 13 forms a strong adhesive layer through material curing, fusing the marking 2 and the cap body 10 into one unit. This structural design effectively resists the effects of environmental temperature changes, mechanical vibration, and material aging, fundamentally solving the problem of marking 2 detachment. This invention not only improves the practicality and aesthetics of the valve cap but also extends its service life, providing a reliable solution for the tire parts industry.

[0034] like Figure 3-4 As shown, as an optional embodiment of this case, the exhaust structure 12 is an overflow groove 121, which is arranged circumferentially around the anti-detachment groove 11.

[0035] It should be noted that the overflow groove 121, as a specific embodiment of the venting structure 12, ensures that the air in the anti-detachment groove 11 can be discharged evenly and fully when the encapsulation material is filled, avoiding localized air bubble retention. Alternatively, the venting structure 12 can also take other forms, such as multiple dispersed vent holes or radially extending venting channels, but the circumferential design of the overflow groove 121, due to its continuity and symmetry, can more effectively cover the entire groove edge, improving venting efficiency. This structure, by providing a stable gas escape path, reduces voids or defects in the encapsulation layer 13, thereby enhancing the integrity of the mark 2 fixation and solving the problem of poor encapsulation caused by poor venting in traditional fixation methods, achieving the technical effect of improving the fixation reliability and durability of the mark 2.

[0036] As an optional embodiment of this case, the overflow groove 121 has a depth of 0.1-1mm and a width of 0.2-2mm.

[0037] It should be noted that this size range is an optimized design based on actual process requirements and material properties. Too shallow a depth may lead to poor venting, while too deep a depth will affect the structural strength of the encapsulation layer 13. Too narrow a width will restrict gas flow, while too wide a width may weaken the support of the groove edges. By controlling the groove size, sufficient gas flow space is ensured during encapsulation material injection, while avoiding adverse effects on the integrity of the encapsulation layer 13. This further solves the problem of reduced fixing strength caused by incomplete bubble removal, achieving a more uniform encapsulation layer 13 formation and higher resistance to environmental stress, thus improving product consistency and service life.

[0038] As an optional embodiment of this case, the sidewall of the anti-detachment groove 11 is provided with a pull-out structure or an anti-detachment structure.

[0039] It should be noted that the pull-out structure increases the mechanical constraint of the mark 2 through the specific shape of the sidewall, while the anti-detachment structure may include protrusions, pits, or other textured designs. However, the pull-out structure is more reliable because it can form an effective locking effect. By utilizing the mechanical interlocking effect generated by the structural geometry, the mark 2 is prevented from shifting under vibration or temperature changes, thereby enhancing the fixing stability. This solves the problem of easy loosening caused by the simple reliance on adhesive in traditional adhesive methods, and improves the anti-detachment resistance of the mark 2 and the overall structural reliability.

[0040] As an optional embodiment of this case, the reverse pull structure is an inverted cone shape.

[0041] It should be noted that the inverted cone design is a specific form of the reverse pull-out structure. Its sidewalls are inclined inward to form a cone-shaped space, making it difficult for the sign 2 to come out after it is embedded. This solves the problem of displacement or falling off of the sign 2 due to mechanical stress during long-term use, and improves the durability of the fixing strength and environmental adaptability.

[0042] As an optional embodiment of this case, the angle between the sidewall and the bottom surface of the reverse pull-out structure is less than 90 degrees.

[0043] It should be noted that an angle that is too small may increase processing difficulty and weaken the locking effect, while an angle that is too large will reduce the anti-detachment performance. By controlling the included angle, the constraint force of the sidewall on mark 2 and the flowability of the encapsulation material are balanced, avoiding stress concentration or incomplete encapsulation caused by improper angle.

[0044] like Figure 1 As shown in Figure 3, as an optional embodiment of this case, the outer surface shape of the encapsulation layer 13 is a planar or convex surface 131.

[0045] It should be noted that the planar design allows the surface of logo 2 to be flush with the top of the cap 1, creating a neat appearance; the convex surface 131 design makes logo 2 protrude from the surface of the top of the cap 1, which not only enhances the three-dimensional visual effect, but also produces a pattern magnification effect through the refraction of the curved surface. By controlling the filling amount and surface tension of the encapsulation material, the desired shape is formed during the curing process, solving the problem of the traditional logo 2 having a single surface shape and limited visual effect, and achieving the technical effect of satisfying personalized appearance requirements while maintaining functional integrity.

[0046] like Figure 3 As shown, as an optional embodiment of this case, the outer wall of the cap 10 is provided with an anti-slip structure 101.

[0047] It should be noted that the anti-slip structure 101 facilitates installation and disassembly by increasing the surface friction coefficient. Its specific implementation may include uniformly distributed textured surfaces or anti-slip patterns with specific geometric shapes, which solves the problems of inconvenient installation and easy slippage caused by the smooth surface of the valve cap, and improves the convenience of operation and safety of use.

[0048] like Figure 1 As shown in Figure 3, as an optional embodiment of this case, the anti-slip structure 101 is a lateral anti-slip groove of a plastic cap or a longitudinal hexagonal anti-slip surface of a metal cap.

[0049] As an optional embodiment of this case, when the cap body 10 is made of plastic, it is integrally molded by injection molding; when it is made of metal, it is formed by CNC machining.

[0050] like Figure 5 As shown, the present invention provides a method for manufacturing a valve cap with markings, comprising the following steps: A valve cap is provided, on which an anti-detachment groove 11 and an exhaust structure 12 communicating with the anti-detachment groove 11 are formed on the top 1 of the valve cap; The mark 2 is placed inside the anti-detachment groove 11; Liquid encapsulation material is filled into the anti-detachment groove 11 marked with 2, and the gas in the anti-detachment groove 11 is discharged through the venting structure 12; The encapsulation material is cured to form an encapsulation layer 13, thereby fixing the mark 2 within the anti-detachment groove 11.

[0051] It should be noted that the method includes the following steps: First, a valve cap is provided, and an anti-detachment groove 11 and an exhaust structure 12 communicating with the anti-detachment groove 11 are formed on the top 1 of the cap. The anti-detachment groove 11 can be manufactured by injection molding or machining, and its shape and size are determined according to the specific requirements of the marking 2. The implementation of the exhaust structure 12 includes an overflow groove 121 arranged around the circumference of the groove or multiple exhaust holes distributed around the groove. These structures play a key role in subsequent processes. The core of this step is to form a basic structure that can accommodate the marking 2 and provide an exhaust channel, creating the necessary conditions for subsequent fixing processes.

[0052] In the step of placing the mark 2 within the anti-detachment groove 11, the mark 2 can be an ink-printed sticker or other form of marker, precisely positioned to be completely contained within the groove. This process must ensure that the mark 2 is in full contact with the bottom and sidewalls of the groove, avoiding wrinkles or misalignment, while maintaining the flatness of the mark 2 surface. Precise alignment ensures the mark 2 is in the optimal fixed position, laying the foundation for subsequent filling of the encapsulation material.

[0053] The steps of filling the anti-detachment groove 11 marked with "2" with liquid encapsulation material and venting the gas within the groove 11 through the venting structure 12 are crucial for ensuring sealing quality. The encapsulation material can be selected from materials with good flowability and adhesion, such as epoxy resin and polyurethane resin, and is injected into the groove in a liquid state through methods such as dripping or injection molding. During this process, the venting structure 12 allows air within the groove to be smoothly expelled, preventing residual air bubbles from affecting the encapsulation quality. By utilizing the synergistic effect of the material's flow characteristics and the venting channel, the encapsulation material is ensured to be fully filled and defect-free, thereby solving the problem of weak adhesion caused by air bubbles in traditional processes.

[0054] The final fixation is achieved by curing the encapsulation material to form an encapsulation layer 13, thereby securing the mark 2 within the anti-detachment groove 11. The curing process can employ natural curing or controlled curing methods, allowing the encapsulation material to transform from a liquid to a solid state under suitable temperature and humidity conditions, forming a robust encapsulation layer 13. This encapsulation layer 13 completely covers the mark 2 and tightly bonds to the inner wall of the anti-detachment groove 11, achieving a dual fixation effect of mechanical interlocking and chemical bonding. The stable three-dimensional network structure formed through material phase change generates a durable adhesive force, thereby preventing the mark 2 from detaching and extending the product's lifespan.

[0055] This method, through the coordinated implementation of the above steps, systematically solves the key technical challenges in the fixing process of the marking 2. The step-by-step process design ensures controllable quality at each stage; the optimized combination of materials and structure enhances the overall fixing strength. Compared with existing technologies, this method not only significantly improves the reliability of marking 2 fixing but also has good process adaptability and product quality consistency, meeting the production needs of valve caps with different materials and structures.

[0056] As an optional embodiment of this case, the filling step adopts a drip molding, injection molding, or dispensing process.

[0057] It should be noted that the drip molding process is suitable for small-batch precision production, forming a uniform encapsulation layer 13 by controlling the amount of glue; the injection molding process is suitable for high-efficiency mass production, which can quickly complete the filling process; the dispensing process is suitable for occasions with high precision requirements, which can achieve precise control of the amount of glue, solve the problem of selecting the filling method of encapsulation material under different production conditions, and achieve the technical effect of optimizing the production process, improving production efficiency and ensuring encapsulation quality.

[0058] As an optional embodiment of this case, the drip molding process includes setting the speed, angle, dispensing nozzle, and closing point parameters of the drip molding spray gun.

[0059] It should be noted that the spray gun speed affects the amount of adhesive dispensed per unit time, the angle determines the direction of adhesive flow, the dispensing nozzle controls the starting position, and the exit point affects the final shape of the adhesive. By precisely controlling the process parameters, the ideal flow and distribution of the adhesive within the anti-detachment groove 11 is achieved, avoiding defects such as insufficient adhesive, overflow, or air bubbles. This solves the encapsulation quality problems caused by improper parameters during the dispensing process, achieving higher consistency and reliability, and improving product yield and reducing process fluctuations.

[0060] As an optional embodiment of this case, the filling step is carried out in a preset clean environment, with the ambient temperature controlled at 15-30℃ and the humidity controlled at 30%-70%.

[0061] It should be noted that the clean environment may include a cleanroom or a local clean bench to prevent dust and other impurities from entering the encapsulation layer 13; the temperature range ensures the fluidity and curing characteristics of the encapsulation material; and the humidity range avoids excessive moisture absorption or premature curing. By controlling environmental conditions, the encapsulation material maintains stable physicochemical properties during the filling process, avoiding performance variations caused by environmental factors. This solves the problem of significant environmental interference in the production process, achieving the technical effect of improving product consistency and reliability, while providing a stable process foundation for large-scale production. The required clean environment refers to the work area where the concentration of suspended particulate matter in the air is limited to a specific range through environmental control measures. This aims to prevent dust, fibers, and other impurities from entering the anti-detachment grooves or adhering to the marking surface during the liquid encapsulation material filling process, thereby avoiding encapsulation layer defects caused by impurities, such as bubbles, inclusions, or poor adhesion. For example, the air cleanliness of the work area is required to reach ISO Class 8 (i.e., Class 100,000) or higher to ensure that the concentration of suspended particles with a diameter ≥0.5 micrometers is controlled.

[0062] As an optional embodiment of this case, the curing step is natural curing, heat curing, or ultraviolet light curing.

[0063] It should be noted that natural curing refers to the curing process that is completed at room temperature by relying on the chemical properties of the material itself, which is suitable for production conditions where the curing speed is not critical; heat curing accelerates the curing reaction through an external heat source, which can improve production efficiency; and ultraviolet curing uses ultraviolet light of a specific wavelength to initiate a polymerization reaction, which is suitable for temperature-sensitive material systems.

[0064] As an optional embodiment of this case, the valve cap is made of at least one of plastic, metal or composite material.

[0065] As an optional embodiment of this case, the encapsulation material is at least one of polyurethane resin and acrylic resin.

[0066] As an optional embodiment of this case, the mark 2 is an ink-printed sticker or other marking.

[0067] It should be noted that ink-printed stickers can be produced using screen printing, offset printing, or digital printing methods, offering the advantages of fine patterns and moderate cost. Other signage components include metal sheets, plastic nameplates, or transfer films, catering to diverse appearance requirements. By using appropriate carriers and fixing methods, the patterns or text are ensured to be clearly displayed and durable, addressing the diverse needs of different customers regarding the form and quality of signage. This achieves a technical effect that balances aesthetics and practicality, while also providing a means to realize product personalization.

[0068] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A valve cap with markings, characterized in that: Includes a hat body, the hat body having a crown; The top of the cap is provided with a groove for accommodating the label to prevent it from falling off, and the edge of the groove is provided with a venting structure that communicates with the outside. The anti-detachment groove is filled with an encapsulation layer, and the mark is fixed in the anti-detachment groove through the encapsulation layer.

2. The valve cap with markings according to claim 1, characterized in that: The exhaust structure is an overflow groove, which is arranged circumferentially around the anti-detachment groove.

3. The valve cap with markings according to claim 1, characterized in that: The sidewalls of the anti-detachment groove are provided with a pull-out structure or an anti-detachment structure.

4. The valve cap with markings according to claim 3, characterized in that: The reverse pull structure is inverted conical in shape.

5. The valve cap with markings according to claim 1, characterized in that: The outer surface of the encapsulation layer is either planar or convex.

6. A method for manufacturing a valve cap with markings, characterized in that, Includes the following steps: A valve cap is provided, on the top of the valve cap, an anti-detachment groove is formed and an exhaust structure communicating with the anti-detachment groove; The mark is placed inside the anti-detachment groove; Liquid encapsulation material is filled into the marked anti-detachment groove, and the gas in the anti-detachment groove is discharged through the venting structure; The encapsulation material is cured to form an encapsulation layer, thereby fixing the mark within the anti-detachment groove.

7. The method for manufacturing a valve cap with markings according to claim 6, characterized in that: In the step of filling the marked anti-detachment groove with liquid encapsulation material and venting the gas in the anti-detachment groove through the venting structure, the filling step adopts a drip molding or dispensing process.

8. The method for manufacturing a valve cap with markings according to claim 7, characterized in that: The drip molding process includes setting parameters for the speed, angle, dispensing nozzle, and sealing point of the drip molding spray gun.

9. The method for manufacturing a valve cap with markings according to claim 6, characterized in that: In the step of filling the marked anti-detachment groove with liquid encapsulation material and venting the gas in the anti-detachment groove through the venting structure, the filling process is carried out in a preset clean environment with the ambient temperature controlled at 15-30℃ and the humidity controlled at 30%-70%.

10. The method for manufacturing a valve cap with markings according to claim 6, characterized in that: The valve cap is made of at least one of plastic, metal, or composite material; and / or the encapsulation material is made of at least one of polyurethane resin and acrylic resin.

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