Air spring airbag mold and air spring airbag

Abstract

The utility model relates to the technical field of air springs, and provides an air spring leather bag mold and an air spring air bag, which comprise a mold cavity, an inner bag and an air supply unit. The mold cavity is used for containing a leather bag of the air spring. And the inner bag is arranged in the mold cavity and is used for sleeving the leather bag on the outer side surface of the inner bag. The air supply unit is used for driving the inner bag to expand so that the leather bag can be attached to the inner wall of the mold cavity. Wherein a plurality of concave points are arranged on the inner wall surface of the die cavity. According to the scheme, the die cavity is provided with the concave points, high-pressure nitrogen enables the inner bag to expand during vulcanization, the leather bag is tightly attached to the die cavity along with expansion of the inner bag, the outer rubber layer of the leather bag can enter the concave points of the die cavity due to the fact that the die cavity is provided with the concave points, and the leather bag is in uneven contact with the die cavity. Therefore, residual gas in the leather bag can be uniformly dispersed into each concave point, defects caused by the fact that the residual gas is concentrated at all places can be avoided, and the qualified rate of products can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs, in particular to an air spring leather bag mold and an air spring airbag. Background Art

[0002] An air spring shock absorber composed of the characteristics of the non-linear stiffness of an air spring can well solve the simultaneous optimization of comfort and controllability and is more and more widely used in the automotive field.

[0003] In the prior art, the outer surface of the leather bag of the air spring is a relatively smooth surface. In this way, the gas in the mold cavity may not be discharged in time during vulcanization, and the gas that cannot be discharged in time may be concentrated at a certain place and cause defects (such as air entrapment), etc. Therefore, it will have a great impact on the product qualification rate. At the same time, the friction force between the relatively smooth outer surface of the leather bag and the pressing ring used to install the leather bag may be insufficient, and the phenomenon of falling off may occur under high pressure. Summary of the Utility Model

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide an air spring leather bag mold and an air spring airbag to improve the qualified rate and stability of the air spring leather bag.

[0005] To achieve the above purpose and other related purposes, the present utility model provides an air spring leather bag mold, including:

[0006] A mold cavity for accommodating the leather bag of the air spring;

[0007] An inner bag disposed in the mold cavity for the leather bag to be sleeved on its outer side surface;

[0008] An air supply unit for driving the inner bag to expand so that the leather bag fits against the inner wall of the mold cavity;

[0009] Wherein, a plurality of concave points are provided on the inner wall surface of the mold cavity.

[0010] In a specific embodiment of the present utility model, the concave points are arranged in an array on the inner wall surface of the mold cavity.

[0011] In a specific embodiment of the present utility model, it further includes a cylindrical mold frame, and a mold cavity wall is detachably disposed on the inner wall of the mold frame, and the inner side of the mold cavity wall constitutes the mold cavity.

[0012] In a specific embodiment of the present utility model, a limiting flange is provided at one end of the mold cavity wall, and a limiting step is provided at the position of the mold frame corresponding to the limiting flange, and the limiting flange and the limiting step form an axial limiting fit.

[0013] In a specific embodiment of the present utility model, it further includes a lower template. One side of the inner bladder close to the lower template is open, and the plate surface of the lower template closes the opening. The air supply unit includes an air passage arranged in the lower template, and the air passage communicates with the opening of the inner bladder.

[0014] In a specific embodiment of the present utility model, an outward-turned edge is provided at the opening of the inner bladder, and a chuck for clamping the outward-turned edge is provided on the lower template.

[0015] In a specific embodiment of the present utility model, it further includes an upper template, and the upper template and the lower template are respectively press-fitted and connected to both ends of the die holder in the axial direction.

[0016] The present utility model also proposes an air spring bladder. The outer surface of the outer skin of the air spring bladder has a plurality of convex points.

[0017] In a specific embodiment of the present utility model, the convex points are arranged in an array on the outer surface of the skin.

[0018] In a specific embodiment of the present utility model, the area where the convex points are located covers the assembly area of the bladder and the mounting pressing ring.

[0019] The present utility model proposes an air spring bladder mold and an air spring bladder. In the above solution, the mold cavity has concave points. During vulcanization, high-pressure nitrogen gas causes the inner bladder to expand, and the skin closely adheres to the mold cavity as the inner bladder expands. Since the mold cavity has concave points, the outer rubber layer of the skin will enter the concave points of the mold cavity. Because the skin and the mold cavity are in uneven contact, the residual gas in the skin will be evenly dispersed into each concave point and will not cause defects due to concentration at a certain place. Therefore, it will greatly improve the product qualification rate. At the same time, the contact area between the skin and the pressing ring is designed as convex point contact, so as to increase the friction force and avoid the skin and the pressing ring from falling off when being pressed too hard. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of an air spring bladder mold in an embodiment of the present utility model;

[0022] Figure 2 It is an enlarged view of part C of the air spring bladder mold in an embodiment of the present utility model;

[0023] Figure 3 This is an enlarged view of part D of the air spring bladder mold in an embodiment of the present utility model.

[0024] Explanation of reference numerals in the drawings: 1. Bladder; 10. Mold cavity; 11. Dimple; 12. Mold cavity wall; 13. Limiting flange; 20. Inner bladder; 30. Mold frame; 31. Limiting step; 40. Lower template; 41. Gas path; 50. Chuck; 60. Upper template. Detailed implementation manners

[0025] The following uses specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through different specific implementation manners. 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 utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0026] It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner. Therefore, only the components related to the present utility model are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0027] During the vulcanization process, the smooth outer surface of the bladder 1 may cause poor gas discharge in the mold cavity 10, resulting in gas concentration in certain areas, and thus the problem of air entrapment. Air entrapment during vulcanization refers to a phenomenon that occurs during the production of rubber products, especially during the compression molding vulcanization process. Specifically, it is manifested as appearance quality defects such as bubbles, lack of rubber, obvious scars, and dents.

[0028] The connection method between the bladder 1 and the plastic part is through the deformation of the pressure ring, which squeezes the bladder 1 and tightly fastens it to the plastic part. When the air spring is working, it relies on the intake valve to intake and exhaust air into the bladder 1 to reach the ideal working state. However, with the increasing requirements of passenger cars, the pressure ring must meet higher burst pressures, that is, the internal pressure. The working principle of the air spring depends on the compression and release of air to absorb and reduce vibrations. This working mechanism requires its structure to be directly in contact with the external environment for effective compression and expansion. Because this part of the airbag will be partially exposed outside without the restraint of the aluminum cylinder, there is a risk of detachment of the pressure ring that is press-fitted with the airbag during use.

[0029] As Figure 1 shown, the present utility model proposes an air spring bladder 1 mold, which includes a mold cavity 10, an inner bladder 20, and a gas supply unit.

[0030] The mold cavity 10 is used to accommodate the bladder 1 of the air spring. The mold cavity 10 is a space for accommodating the bladder 1 of the air spring, usually having a specific shape and size to ensure that the bladder 1 can fit therein and expand correctly.

[0031] The inner bladder 20 is arranged inside the mold cavity 10, as Figure 3 shown for the bladder 1 to be sleeved on its outer side. The inner bladder 20 is located inside the mold cavity 10 and its function is to be sleeved on the outside of the bladder 1 during inflation, playing a role of support and guidance. The inner bladder 20 is usually soft so as to be able to stretch and adapt to the shape of the bladder 1 during inflation.

[0032] The air supply unit is used to drive the inner bladder 20 to expand so that the bladder 1 fits against the inner wall of the mold cavity 10. The air supply unit is a device used to drive the inflation of the inner bladder 20. The air supply unit can be an air pump for delivering gas to the inner bladder 20 to make it expand. When the inner bladder 20 expands, it will push the outer bladder 1 to make it fit against the inner wall of the mold cavity 10, ensuring that the bladder 1 can be in close contact with the mold during vulcanization or use.

[0033] Among them, a plurality of concave points 11 are arranged on the inner wall surface of the mold cavity 10. The concave points 11 are dot-like depressions. The design of the concave points 11 on the mold cavity 10 enables the outer rubber layer of the bladder 1 to enter therein, forming an uneven contact surface. This kind of contact enables the residual gas in the bladder 1 to be more evenly dispersed into each concave point 11 instead of concentrating at a certain point, thus reducing the possibility of defects such as air trapping. Through the design of the concave points 11, the gas can be discharged more evenly during the vulcanization process and no large air bubbles or other quality defects will be formed on the surface of the bladder 1, significantly improving the qualified rate and overall quality of the product. The concave points 11 can promote closer contact between the bladder 1 and the inner wall of the mold cavity 10. This kind of close contact helps to ensure that the bladder 1 can accurately replicate the shape and details of the mold cavity 10 during vulcanization or other processing, improving the precision and quality of the product.

[0034] As Figure 1 、 2 shown, the concave points 11 are arranged in an array on the inner wall surface of the mold cavity 10. The arrangement of the concave points 11 can help to more evenly disperse the gas in the mold cavity 10. During the inflation process, the concave points 11 can serve as positions for gas aggregation, preventing the formation of air bubbles or voids, thus reducing the possibility of quality defects such as air trapping.

[0035] As Figure 1As shown, it further includes a cylindrical mold base 30. A mold cavity wall 12 is detachably arranged on the inner wall of the mold base 30, and the inner side of the mold cavity wall 12 forms the mold cavity 10. The mold cavity wall 12 is detachable, which means that when the mold needs to be replaced or maintained, the mold cavity wall 12 can be relatively easily disassembled and replaced without replacing the entire mold base 30. This design saves time and costs, and improves the flexibility and efficiency of the production line.

[0036] As Figure 1 shown, a limiting flange 13 is arranged at one end of the mold cavity wall 12, and a limiting step 31 is arranged at the position of the mold base 30 corresponding to the limiting flange 13. The limiting flange 13 and the limiting step 31 form an axial limiting fit. Through the axial limiting fit of the limiting flange 13 and the limiting step 31, it can be ensured that the mold cavity wall 12 can be accurately positioned and fixed when assembled to the mold base 30. This design can effectively prevent the mold cavity wall 12 from moving or shifting during use, and ensure the stability and consistency of the mold. The design of the limiting flange 13 and the limiting step 31 enables the mold cavity wall 12 to be relatively easily assembled to the mold base 30 and can be conveniently disassembled when needed. This assembly method saves time and reduces problems caused by poor or inaccurate assembly.

[0037] As Figure 1 shown, it further includes a lower template 40. One side of the inner bladder 20 close to the lower template 40 is open, and the plate surface of the lower template 40 closes the opening. The air supply unit includes an air passage 41 arranged in the lower template 40, and the air passage 41 is communicated with the opening of the inner bladder 20. The opening of the inner bladder 20 is close to the lower template 40, so that the installation, disassembly or maintenance of the inner bladder 20 can be relatively conveniently carried out when needed. This design simplifies the maintenance process of the equipment, reduces the downtime, and improves the overall operation efficiency. By directly connecting the air passage 41 with the opening of the inner bladder 20, the risk of gas leakage caused by connection points or pipeline systems is reduced. This direct connection design helps to maintain the airtightness and stability of the gas system.

[0038] As Figure 1 shown, an outer flange is arranged at the opening of the inner bladder 20, and a chuck 50 for clamping the outer flange is arranged on the lower template 40. Through the outer flange at the opening of the inner bladder 20 and the chuck 50 on the lower template 40, a firm physical connection can be achieved. This connection method ensures that the inner bladder 20 will not accidentally fall off or move during operation, thereby enhancing the stability and safety of the equipment. The chuck 50 can accurately clamp the outer flange to ensure that the inner bladder 20 is in the correct position. This is particularly important for processing tasks that require precise position and alignment, and can avoid production quality problems caused by position deviation.

[0039] AsFigure 1 As shown, it further includes an upper template 60, and the upper template 60 and the lower template 40 are respectively press-fitted and connected to both ends of the die carrier 30 in the axial direction. The upper template 60 and the lower template 40 are press-fitted and connected to both ends of the die carrier 30 in the axial direction, forming a structurally stable whole. This connection method can effectively prevent unnecessary movement or deviation of the mold during the processing due to vibration or external force, ensuring the accuracy and stability of the processing. The design of the axial connection of the die carrier 30 enables the upper template 60 and the lower template 40 to be relatively easily adjusted and maintained. This is particularly important for production lines that require frequent mold replacement or fine adjustment, which can reduce downtime and improve production efficiency.

[0040] The present utility model also proposes an air spring airbag, and the outer surface of the leather bag 1 on the outer layer of the air spring airbag has a plurality of convex points. Designing the contact area between the leather bag 1 and the pressing ring as convex point contact can increase the friction force between them. This design can effectively prevent the problem that the leather bag 1 and the pressing ring fall off due to pressure in the face of high-pressure situations. The convex point contact not only enhances the connection stability but also can maintain longer durability during use, thereby reducing the need for maintenance and replacement, and further improving the reliability and lifespan of the product.

[0041] In a specific embodiment of the present utility model, the convex points are arranged in an array on the outer surface of the leather bag 1. The area where the convex points are located covers the assembly area of the airbag and the installation pressing ring. The presence of the convex points can increase the friction force between the airbag and the installation pressing ring, thereby preventing slippage that may occur due to vibration or movement during use. This is crucial for ensuring that the airbag maintains a stable position after installation, especially in hydraulic or pneumatic systems. By increasing the contact area between the airbag and the installation pressing ring, the convex points can help reduce the risk of air leakage caused by improper assembly or vibration. This design helps improve the airtightness and long-term stability of the airbag, reducing the frequency of maintenance and repair.

[0042] In summary, the present utility model proposes a mold for an air spring leather bag 1 and an air spring airbag. In the above solution, the mold cavity 10 has concave points 11. When vulcanizing, the high-pressure nitrogen gas causes the inner bladder 20 to expand, and the leather bag 1 closely adheres to the mold cavity 10 as the inner bladder 20 expands. Since the mold cavity 10 has concave points 11, the outer rubber layer of the leather bag 1 will enter the concave points 11 of the mold cavity 10. Because the leather bag 1 and the mold cavity 10 are in uneven contact, the residual gas in the leather bag 1 will be evenly dispersed into each concave point 11, and will not produce defects due to concentration in a certain place. Therefore, it will greatly improve the product qualification rate. At the same time, the contact area between the leather bag 1 and the pressing ring is designed as convex point contact, so as to increase the friction force and avoid the leather bag 1 and the pressing ring falling off when the pressure is too high.

[0043] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present utility model should still be covered by the claims of the present utility model.

[0044] In the description herein, numerous specific details are provided, such as examples of components and / or methods, to provide a complete understanding of the embodiments of the present utility model. However, those skilled in the art will recognize that the embodiments of the present utility model can be practiced without one or more of the specific details or by other devices, systems, components, methods, parts, materials, parts, etc. In other instances, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of the embodiments of the present utility model.

[0045] Throughout the specification, reference to "an embodiment", "embodiment" or "specific embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present utility model and not necessarily in all embodiments. Thus, the appearances of the phrases "in an embodiment", "in an embodiment" or "in a specific embodiment" in various places throughout the specification are not necessarily referring to the same embodiment. Additionally, the particular features, structures, or characteristics of any specific embodiment of the present utility model can be combined in any suitable manner with one or more other embodiments. It should be understood that other variations and modifications of the embodiments of the utility model described and shown herein may be made in accordance with the teachings herein and will be considered part of the spirit and scope of the present utility model.

[0046] It should also be understood that one or more of the elements shown in the drawings can be implemented in a more separated or more integrated manner, or even removed if in some cases inoperable or provided because it can be useful for a particular application.

[0047] In addition, unless otherwise clearly specified, any marked arrows in the drawings should be considered exemplary only and not restrictive. Further, unless otherwise indicated, the term "or" as used herein generally intends to mean "and / or". Where combinations of components or steps are anticipated because the term is unclear as to providing separation or combination capabilities, the combination of components or steps will also be considered to be specified.

[0048] As used in the description herein and throughout the following claims, unless otherwise indicated, "a", and "the" include plural referents. Similarly, as used in the description herein and throughout the following claims, unless otherwise indicated, the meaning of "in..." includes "in..." and "on...".

[0049] The foregoing description of the embodiments shown in the present utility model (including that described in the abstract of the specification) is not intended to be exhaustive or to limit the present utility model to the precise forms disclosed herein. Although specific embodiments of the present utility model and examples of the present utility model are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present utility model as will be recognized and understood by those skilled in the art. As noted, these modifications can be made to the present utility model in accordance with the foregoing description of the embodiments of the present utility model, and these modifications will be within the spirit and scope of the present utility model.

[0050] The systems and methods have been described generally herein to facilitate an understanding of the details of the present utility model. In addition, various specific details have been given to provide an overall understanding of the embodiments of the present utility model. However, those skilled in the relevant art will recognize that the embodiments of the present utility model can be practiced without one or more of the specific details, or with other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been shown or described in detail to avoid obscuring aspects of the embodiments of the present utility model.

[0051] Accordingly, although the present utility model has been described herein with reference to its specific embodiments, modifications, various changes and substitutions are also within the foregoing disclosure, and it should be understood that in some instances, some features of the present utility model will be employed without corresponding use of other features without departing from the scope and spirit of the claimed utility model. Therefore, many modifications may be made to adapt a particular environment or material to the essential scope and spirit of the present utility model. The present utility model is not intended to be limited to the specific terms used in the following claims or to the specific embodiments disclosed as the best mode contemplated for carrying out the present utility model, but the present utility model will include any and all embodiments and equivalents falling within the scope of the appended claims. Accordingly, the scope of the present utility model will be determined only by the appended claims.

Claims

1. An air spring bladder mold, characterized in that: include: A mold cavity for accommodating a bladder of an air spring; An inner bag is arranged in the mold cavity and is used for the outer side of the leather bag to be covered by the inner bag; An air supply unit, used for driving the inner bag to expand so that the bladder fits the inner wall of the mold cavity; Wherein, a plurality of concave points are arranged on the inner wall surface of the mold cavity.

2. The air spring bladder mold according to claim 1, characterized in that: The concave points are arranged in an array on the inner wall surface of the mold cavity.

3. The air spring bladder mold according to claim 1, characterized in that: It also includes a cylindrical mold frame, on the inner wall of which a mold cavity wall is detachably provided, and the inner side of the mold cavity wall constitutes the mold cavity.

4. The air spring bladder mold according to claim 3, characterized in that: A limiting flange is arranged at one end of the mold cavity wall, and a limiting step is arranged on the mold frame corresponding to the position of the limiting flange, and the limiting flange and the limiting step form an axial limiting fit.

5. The air spring bladder mold according to claim 3, characterized in that: It also includes a lower template, the side of the inner bag close to the lower template is open, the plate surface of the lower template closes the opening, and the air supply unit includes an air path arranged in the lower template, and the air path is connected to the opening of the inner bag.

6. The air spring bladder mold according to claim 5, characterized in that: The opening of the inner bag is provided with an outer flange, and the lower template is provided with a clamping plate for clamping the outer flange.

7. The air spring bladder mold according to claim 5, characterized in that: It also includes an upper mold plate, and the upper mold plate and the lower mold plate are respectively pressed and connected at two ends of the mold frame in the axial direction.

8. An air spring airbag, characterized in that: The outer surface of the leather bag of the outer layer of the air spring air bag has a plurality of convex points.

9. The air spring airbag according to claim 8, characterized in that: The protrusions are arranged in an array on the outer surface of the bladder.

10. The air spring airbag according to claim 8, characterized in that: The area where the protrusions are located covers the assembly area of ​​the airbag and the mounting pressure ring.

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