Composite sealing foam
By introducing an airbag grid layer and a metal foil layer of variable thickness into the sealing foam, the problems of insufficient deformation and electromagnetic shielding of the sealing foam in complex environments are solved, and a composite sealing foam with strong adaptability and good sealing performance is achieved.
Patent Information
- Application Number
- CN202422723927.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-08
AI Technical Summary
Traditional sealing foam has insufficient deformation, poor sealing effect and lacks electromagnetic shielding function when facing complex and changing usage environments.
A variable-thickness airbag grid layer is used between the symmetrically arranged first and second foam bodies, combined with a metal foil layer and a soft film layer. The airbag units are connected through an air pipe network to achieve adjustment of foam thickness and elasticity, and have an electromagnetic shielding effect.
The foam achieves variability in thickness, adapts to the sealing of gaps of different sizes, improves the sealing effect, and has good tensile strength and electromagnetic shielding functions.
Smart Images
Figure CN223445474U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of foam, especially a composite sealing foam. BACKGROUND
[0002] Traditional sealing foam is mostly made of single material, which has certain sealing effect and can meet basic use requirements, but when facing complex and changeable use environment, for example, in the case of different gap widths, some foams have problems such as insufficient deformation degree, poor sealing effect, and inconvenient use, and for example, in the use environment requiring electromagnetic interference shielding, some foams lack electromagnetic shielding function. Therefore, there is an urgent need in the market for a composite sealing foam with more comprehensive performance and stronger adaptability. SUMMARY
[0003] The utility model aims at providing a composite sealing foam, which has variable thickness, significantly improved sealing performance, and is easy to use.
[0004] To solve the above technical problems, the utility model adopts the following technical scheme:
[0005] A composite sealing foam comprises a first foam body and a second foam body arranged symmetrically, and a gas bag net rack layer with variable thickness is arranged between the first foam body and the second foam body.
[0006] A concave pit is arranged on one side of the first foam body and the second foam body close to the gas bag net rack layer, the gas bag net rack layer comprises a plurality of equidistantly distributed gas bag units, the gas bag units are connected through a gas pipe net, and the concave pit one-to-one accommodates the gas bag units.
[0007] Further, an air inlet and outlet are arranged on the gas pipe net, each gas bag unit is connected to the gas pipe net through four interfaces, the interiors of all the gas bag units are communicated, and the thickness of the gas bag unit is greater than that of the gas pipe net.
[0008] Further, the concave pit and the gas bag unit are separated by a metal foil layer or a soft rubber sheet layer.
[0009] Further, the gas bag unit is a hollow ellipsoidal or spherical shape.
[0010] Further, the thickness of the soft rubber sheet layer is greater than that of the metal foil layer.
[0011] Further, the gas bag unit is elastically expandable and contractible.
[0012] Further, a glue layer is arranged on the side of the second foam body away from the first foam body.
[0013] The technical scheme of the utility model has the beneficial effects that
[0014] The utility model discloses a composite sealing foam, which is provided with an air bag net rack layer with variable thickness, realizes adjustment of the total thickness and elasticity of the foam, can adapt to sealing gaps of different sizes, and further improves the sealing effect through the soft rubber sheet layer; the middle clamping longitudinal and transverse intersecting air pipe net effectively improves the bidirectional tensile property of the foam; the setting of the metal foil layer makes the foam have electromagnetic shielding effect, and expands the function. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can also be obtained according to these drawings without the creative labor.
[0016] Figure 1 It is the exploded structural schematic diagram of the utility model;
[0017] Figure 2 It is the exploded structural schematic diagram of the utility model; Figure 1 It is the enlarged schematic diagram of A in the middle;
[0018] Figure 3 It is the three-dimensional structural schematic diagram of the utility model;
[0019] Figure 4 It is the three-dimensional structural schematic diagram of the utility model; Figure 3 It is the sectional structural schematic diagram of B-B direction in the middle;
[0020] Figure 5 It is the sectional structural schematic diagram of B-B direction in the middle; Figure 4 It is the enlarged schematic diagram of C in the middle.
[0021] In the drawing: 1: first foam body; 2: second foam body; 3: air bag net rack layer; 3a: air bag unit; 3b: air pipe net; 3b-1: inlet and outlet; 4: metal foil layer; 5: soft rubber sheet layer; 6: adhesive layer. DETAILED DESCRIPTION
[0022] The utility model will be further explained in detail in combination with the drawings. These drawings are all simplified schematic diagrams, only illustrate the basic structure of the utility model in the schematic mode, therefore, it only shows the structure related to the utility model, and should not limit the scope of protection of the utility model.
[0023] Please refer to Figures 1-5The utility model provides a kind of composite sealing foam, including symmetrically arranged first foam body 1 and second foam body 2, variable thickness air bag net rack layer 3 is arranged between the two, air bag net rack layer 3 is respectively provided with metal foil layer 4 and soft rubber sheet layer 5 between first foam body 1 and second foam body 2;Metal foil layer 4 and soft rubber sheet layer 5 realize double-layer sealing, the interval of two changes with the thickness of air bag net rack layer 3, the thickness of air bag net rack layer 3 changes finally realizes the adjustment of the interval of first foam body 1 and second foam body 2, can adapt to the sealing gap of different width size.
[0024] Specifically, the first foam body 1 and the second foam body 2 are provided with a pit on the side close to the air bag net rack layer 3, the air bag net rack layer 3 includes a plurality of equidistantly distributed air bag units 3a, the air bag units 3a are hollow ellipsoidal or spherical and elastically expandable and contractible, the air bag units 3a are connected by an air pipe net 3b, and the pit one-to-one accommodates the air bag units 3a.
[0025] The air pipe net 3b includes longitudinal pipes and transverse pipes, effectively improves the tensile property of the foam, is provided with ≥1 air inlet / outlet 3b-1, each air bag unit 3a is connected to the air pipe net 3b through four interfaces, the interiors of all air bag units 3a are communicated, the thickness of the air bag unit 3a is greater than that of the air pipe net 3b, the air pipe net 3b is inflated or deflated through the air inlet / outlet 3b-1, the connected air bag units 3a are controlled to expand or contract, the thickness of the air bag net rack layer 3 is adjusted, and finally the filling gap of different widths can be matched, and good sealing effect is ensured.
[0026] Further optimization scheme, the pit and the air bag unit 3a are separated by the metal foil layer 4 or the soft rubber sheet layer 5, so that each pit is balanced under pressure, the metal foil layer 4 or the soft rubber sheet layer 5 is raised and lowered with the gap between the pit and the air bag unit 3a, the thickness of the soft rubber sheet layer 5 is greater than that of the metal foil layer 4, the metal foil layer 4 has a significant shielding effect on the electric field, when the external electric field acts on the area wrapped by the metal foil layer 4, the free electrons in the metal foil layer 4 will redistribute under the action of the electric field, according to the principle of electrostatic balance, an electric field equal in size and opposite in direction to the external electric field is generated inside the metal foil layer 4, so that the total electric field inside the metal foil layer 4 is zero. This effectively blocks the influence of the external electric field on the internal space; the material of the soft rubber sheet layer 5 is rubber, the elasticity of the rubber sheet is better than that of the first foam body 1 and the second foam body 2, can absorb and disperse impact force, play a role in shock absorption and buffering, in addition, also play a good waterproof sealing and insulation effect.
[0027] In addition, the second foam body 2 is provided with an adhesive layer 6 away from the first foam body 1, the adhesive layer 6 can firmly connect the foam with the surface of the object, and fill the connecting gap.
[0028] In summary, the composite sealing foam has the air bag net rack layer 3 with variable thickness, realizes adjustment of the total thickness and elasticity of the foam, can adapt to sealing gaps with different sizes, and the soft rubber sheet layer 5 further improves the sealing effect; the air pipe net 3b which is longitudinally and transversely interlaced in the middle clamping effectively improves the bidirectional tensile property of the foam; the metal foil layer 4 is arranged, so that the foam has the electromagnetic shielding effect, the function is expanded, and the use scene is wide.
[0029] The above merely describes a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this. It should be pointed out that, for ordinary skilled persons in the art, changes, modifications or additions are made without departing from the concept of the present application, and all should be covered in the protection scope of the present application.
Claims
1. A composite sealing foam, characterized in that: It comprises a symmetrically arranged first foam body (1) and a second foam body (2), with an airbag grid layer (3) of variable thickness arranged between the two, and a metal foil layer (4) and a soft film layer (5) respectively arranged between the airbag grid layer (3) and the first foam body (1) and the second foam body (2); A pit is provided on one side of the first foam body (1) and the second foam body (2) close to the airbag grid layer (3); the airbag grid layer (3) comprises a plurality of airbag units (3a) evenly distributed at equal intervals; the airbag units (3a) are connected to each other via an air pipe network (3b); and the pits accommodate the airbag units (3a) one by one.
2. The composite sealing foam according to claim 1, characterized in that: The tracheal network (3b) is provided with air inlets and outlets (3b-1), and each airbag unit (3a) is connected to the tracheal network (3b) via four interfaces, so that the interiors of all airbag units (3a) are connected.
3. The composite sealing foam according to claim 2, characterized in that: The recess is separated from the airbag unit (3a) by a metal foil layer (4) or a soft plastic layer (5).
4. The composite sealing foam according to claim 2, characterized in that: The airbag unit (3a) is in the shape of a hollow ellipsoid or a sphere.
5. The composite sealing foam according to claim 3, characterized in that: The thickness of the airbag unit (3a) is greater than that of the tracheal network (3b), and the thickness of the soft plastic layer (5) is greater than that of the metal foil layer (4).
6. The composite sealing foam according to claim 4, characterized in that: The airbag unit (3a) is elastically expandable and contractible.
7. The composite sealing foam according to any one of claims 1 to 6, characterized in that: An adhesive layer is provided on a side of the second foam body (2) away from the first foam body (1).