Ultrathin foam sandwich
By adopting a combined structure of ultra-thin foam board, inner adhesive film, outer adhesive film and prepreg layer in the foam sandwich parts, the existing foam sandwich parts are solved, and the product is difficult to meet the requirements is achieved, which achieves higher strength and lighter weight, and prevents product deformation during the demolding process.
Patent Information
- Application Number
- CN202422312997.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The existing foam sandwich parts have low strength and are difficult to meet the requirements. The product is easily deformed due to thermal expansion and contraction of the mold during demolding.
Ultra-thin foam sandwich parts are used, and the front and back sides of the foam board are placed on the center of the long and strips of the inner adhesive film, and the outer adhesive film is coated on the outer surface of the foam board and the inner adhesive film, and the prepreg layer is laid on the outer side of the outer adhesive film.
The strength of the foam is improved, the requirements for foam thickness are reduced, the weight of the product is reduced, the cost is saved, and the product deformation caused by the thermal expansion and contraction of the mold is prevented during the demolding process.
Smart Images
Figure CN222992658U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of composite materials, and particularly to an ultra-thin foam sandwich part. Background Art
[0002] As is well known, with the continuous development of composite material technology, its excellent properties have gradually been recognized by people, and its application scope has also been rapidly expanding. Composite materials are increasingly widely used in aerospace. Composite parts use sandwich structures extensively to reduce weight. However, for existing foam sandwich parts, their strength is relatively low, the weight is difficult to meet the requirements, and product deformation is likely to occur during demolding due to the thermal expansion and contraction of the mold. Summary of the Invention
[0003] In order to overcome the deficiencies of the prior art, the utility model provides an ultra-thin foam sandwich part, which improves the foam strength and reduces the requirement for the foam thickness.
[0004] The technical solution adopted by the utility model to solve its technical problems is: an ultra-thin foam sandwich part is provided with a foam board. The feature is that a long strip-shaped inner adhesive film is pasted at the center position on both the front and back sides of the foam board, and an outer adhesive film is coated on the outer surface of the foam board and the outer surface of the inner adhesive film, and a prepreg layer is paved on the outside of the outer adhesive film.
[0005] The beneficial effect of the utility model is that it improves the foam strength, reduces the requirement for the foam thickness, reduces the product weight, saves costs, and can prevent product deformation caused by the thermal expansion and contraction of the mold during demolding. Brief Description of the Drawings
[0006] The following further illustrates the utility model with reference to the drawings and embodiments.
[0007] Figure 1 Structural schematic diagram of the utility model.
[0008] Figure 2 is Figure 1 A-A cross-sectional view of
[0009] Figure 3 Paving schematic diagram of the inner adhesive film.
[0010] In the figure, 11. foam board, 12. inner adhesive film, 13. outer adhesive film, 14. prepreg layer. Detailed Embodiment
[0011] In the figure, the utility model is provided with a foam board 11. A long strip-shaped inner adhesive film 12 with the same width is pasted at the center position on both the front and back sides of the foam board 11. An outer adhesive film 13 is coated on the outer surface of the foam board 11 and the outer surface of the inner adhesive film 12, and a prepreg layer 14 is paved on the outside of the outer adhesive film 13.
[0012] The processing method of the present utility model is as follows:
[0013] In the first step, first place the foam board 11 in an oven and keep it at 90 °C for 2 hours. The thickness of the foam board is 2 mm to 10 mm. The foam board can be of equal thickness or non-equal thickness;
[0014] In the second step, stick an inner adhesive film 12 with a width of 5 mm in the center of both the front and back sides of the foam board 11, as shown in Figure 3 ;
[0015] In the third step, encapsulate and cure;
[0016] In the fourth step, polish the surface of the cured inner adhesive film 12 to be rough;
[0017] In the fifth step, lay an outer adhesive film 13 on the surfaces of the foam board 11 and the inner adhesive film 12, and then lay a prepreg layer 14 on the outside of the outer adhesive film, as shown in Figure 2 ;
[0018] In the sixth step, close the mold and cure;
[0019] In the seventh step, demold at 80 °C to reduce the product deformation caused by the thermal expansion and contraction of the mold.
Claims
1. An ultra-thin foam sandwich component, provided with a foam board, characterized in that: A long inner film is attached to the center of both sides of the foam board, and an outer surface of the foam board and the outer surface of the inner film are covered with an outer film, and a prepreg layer is laid on the outer side of the outer film.