CN210828049U

CN210828049U - Foam sandwich board

Info

Publication number: CN210828049U
Application number: CN201921061710.XU
Authority: CN
Inventors: 李赛; 贾金荣; 刘含茂; 裴海帆; 吴东森; 魏荣耀
Original assignee: Zhuzhou Times New Material Technology Co Ltd
Current assignee: Zhuzhou Times New Material Technology Co Ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-06-23
Anticipated expiration: 2029-07-09

Abstract

Foam sandwich panel, including lower sheet layer, foam layer and above-mentioned sheet layer, the foam layer presss from both sides below between sheet layer and the above-mentioned sheet layer, its characterized in that the foam layer in have a strengthening rib, the intensity of strengthening rib be greater than the intensity of foam layer, and the strengthening rib runs through the foam layer and contacts with lower sheet layer and above-mentioned sheet layer. The utility model discloses the strengthening rib together bears the pressure that comes from the transmission of upper and lower panel layer with the foam blanket when bearing, increases the intensity of foam blanket, improves the overall structure intensity of foam sandwich panel, combines into wholly with the foam blanket promptly after the strengthening rib shaping, and bonding strength is better, can effectively avoid in the use that the strengthening rib is not hard up, and the mechanical properties that strengthening rib and foam blanket combined is more even, makes the mechanical properties of foam sandwich panel more even.

Description

Foam sandwich board

Technical Field

The utility model relates to a foam sandwich panel belongs to combined material technical field.

Background

The foam sandwich structure is composed of a foam core material with low density and large thickness and a composite material panel (or aluminum panel) with large rigidity strength and thin thickness, and the core layer separates the panels with high performance, so that the bending rigidity of the sandwich structure is greatly increased on the premise of increasing a small amount of weight, and the stability of the structure is improved. Meanwhile, the foam sandwich structure has the advantages of sound and heat insulation, energy absorption and low cost, so that the foam sandwich structure is widely applied to various fields of aerospace, ships, wind power generation, rail transit, buildings and the like. Because the panel is very thin among the sandwich structure, self flexural rigidity is lower, and foam core layer intensity, modulus are low, can lead to foam core layer destruction conquassation when receiving strong load, perhaps when receiving little energy impact load, can cause the invisible damage of mesh in foam core layer to influence whole sandwich structure's intensity and reliable stability.

In addition, if the overall strength and rigidity of the traditional foam sandwich panel need to be improved, metal reinforcing ribs are generally fixed outside a skin through a bonding and riveting process, and as the rigidity difference between a sandwich structure and the metal reinforcing ribs is large, the reinforcing ribs can be loosened for a long time for the foam sandwich panel in a stressed load environment (such as a foam sandwich structure on a high-speed motor train unit), so that the strength and rigidity of the foam sandwich panel are reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a foam sandwich panel, the strengthening rib together bears the pressure that comes from the transmission of upper and lower panel layer with the foam blanket when bearing, increases the intensity of foam blanket, improves the overall structure intensity of foam sandwich panel, combine into wholly with the foam blanket promptly after the strengthening rib shaping, and joint strength is better, can effectively avoid in the use strengthening rib not hard up, and the mechanical properties that strengthening rib and foam blanket combined is more even, makes the mechanical properties of foam sandwich panel more even.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

foam sandwich panel, including lower sheet layer, foam layer and above-mentioned sheet layer, the foam layer presss from both sides below between sheet layer and the above-mentioned sheet layer, its characterized in that the foam layer in have a strengthening rib, the intensity of strengthening rib be greater than the intensity of foam layer, and the strengthening rib runs through the foam layer and contacts with lower sheet layer and above-mentioned sheet layer.

Preferably, the foam layer is provided with a forming groove corresponding to the reinforcing rib, and the reinforcing rib is formed in the forming groove.

Preferably, the reinforcing rib is made of glass fiber composite materials formed by laminating glass fiber cloth as an added body and epoxy resin as a base body, and the foam layer is made of PMI foam materials.

Preferably, the glass fiber cloth in the reinforcing rib is plain weave glass fiber cloth, and the thickness of a single layer of the glass fiber cloth is 0.2-0.3 mm.

Preferably, the molding groove comprises a transverse groove arranged along the length direction of the foam layer and a longitudinal groove arranged along the width direction of the foam layer, the transverse groove and the longitudinal groove are uniformly distributed at intervals, and the number of the transverse grooves and the number of the longitudinal grooves are equal.

Preferably, the ends of the transverse grooves and the longitudinal grooves are close to the edge of the foam layer.

Preferably, the cross section of strengthening rib all be the I shape, and the thickness on each limit of the I shape of strengthening rib is the same, the top surface and the foam blanket top surface parallel and level of strengthening rib, strengthening rib bottom surface and foam blanket bottom surface parallel and level.

Preferably, the top surface of the reinforcing rib accounts for 20-30% of the area of the top surface of the foam layer.

Preferably, the reinforcing ribs are made of the same material as the lower plate layer and the upper plate layer, the lower plate layer and the upper plate layer are equal in thickness, and the thickness of each I-shaped side of each reinforcing rib is not smaller than that of the lower plate layer.

The utility model has the advantages that:

the utility model discloses add the strengthening rib in the foam blanket, and the intensity of strengthening rib is greater than the intensity of foam blanket to with the upper and lower panel layer contact, the strengthening rib together bears the pressure that comes from the transmission of upper and lower panel layer with the foam blanket when bearing, the intensity of increase foam blanket improves the overall structure intensity of foam sandwich panel.

Through set up the shaping groove in the foam blanket, shaping strengthening rib in the shaping groove, the strengthening rib is as increasing the body with glass fiber cloth stromatolite, and epoxy adopts the shaping technology shaping in the shaping groove as the base member, combines into whole with the foam blanket promptly after the shaping, and bonding strength is better, can effectively avoid in the use strengthening rib not hard up, and the mechanical properties that strengthening rib and foam blanket combined is more even, makes the mechanical properties of foam sandwich panel more even.

The strengthening rib is the I shape and bears the weight of the intensity higher, and the strengthening rib is the same with the material of lower sheet layer and higher authority sheet layer, and rigidity is unanimous, can effectively increase the bulk rigidity of foam sandwich panel, and the bonding nature of strengthening rib and lower sheet layer and higher authority sheet layer is better in the forming process, changes adhesive bonding, further improves the wholeness ability of foam sandwich panel.

Drawings

FIG. 1 is a cross-sectional view of a foam sandwich panel in an embodiment.

Fig. 2 is a schematic structural view of the foam layer.

Detailed Description

The following describes embodiments of the present invention in detail with reference to fig. 1 to 2.

Foam sandwich panel, including lower panel 1, foam layer 2 and above-mentioned panel 3, foam layer 2 presss from both sides below between panel 1 and above-mentioned panel 3, its characterized in that foam layer 2 in have strengthening rib 4, the intensity of strengthening rib 4 be greater than the intensity of foam layer 2, and strengthening rib 4 runs through foam layer 2 and panel 1 below and above-mentioned panel 3 contact.

As shown in the figure, the foam sandwich board is additionally provided with the reinforcing ribs 4 in the foam layer 2, the strength of the reinforcing ribs 4 is greater than that of the foam layer and is in contact with the upper panel layer and the lower panel layer, the reinforcing ribs and the foam layer bear the pressure transmitted by the upper panel layer and the lower panel layer when bearing, the strength of the foam layer is increased, the overall structural strength of the foam sandwich board is improved, the bending resistance and the side pressure resistance of the foam sandwich board are improved, and the strength and the reliability and the stability of the whole sandwich structure are improved.

Wherein, the foam layer 2 is provided with a forming groove 21 corresponding to the reinforcing rib 4, and the reinforcing rib 4 is formed in the forming groove 21. The reinforcing rib 4 is made of glass fiber cloth laminated layers serving as an adding body, epoxy resin serves as a glass fiber composite material formed by a base body, and the foam layer 2 is made of PMI foam material.

Through set up shaping groove 21 in the foam blanket, form strengthening rib 4 in shaping groove 21, the strengthening rib is as increasing the body with the glass fiber cloth stromatolite, and epoxy adopts the shaping technology shaping in the shaping groove as the base member, combines into an entirety with foam blanket 2 promptly after the shaping, and bonding strength is better, can effectively avoid the strengthening rib not hard up in the use, and the mechanical properties that strengthening rib and foam blanket combined is more even, makes the mechanical properties of foam sandwich panel more even.

The glass fiber cloth in the reinforcing ribs 4 is plain weave glass fiber cloth, the thickness of a single layer of the glass fiber cloth is 0.2-0.3 mm, the formed reinforcing ribs 4 are firm, wear-resistant and smooth in surface, and the surfaces of the formed reinforcing ribs 4 are flush with the surfaces of the foam layers 3 and bear pressure together.

Wherein, shaping groove 21 include the horizontal groove 21.1 that sets up along foam layer 2 length direction and the vertical groove 21.2 that sets up along foam layer 2 width direction, horizontal groove 21.1 and vertical groove 21.2 are even interval distribution, and quantity equals. The transverse grooves 21.1 and the longitudinal grooves 21.2 are transversely and longitudinally staggered, the reinforcing ribs 4 formed in the forming grooves 21 are also of a transversely and longitudinally staggered structure, the structural strength is higher, the mechanical property of the reinforcing ribs is more uniform when the reinforcing ribs are combined with the foam layer 2, and the uniformity of the mechanical property of the foam sandwich panel is further improved.

Wherein, the ends of the transverse grooves 21.1 and the longitudinal grooves 21.2 are close to the edge of the foam layer 2. The combination of the foam layer 2 and the reinforcing ribs 4 is ensured to extend from the middle edge to the vicinity of the edge, and the uniformity of the intensity distribution is ensured.

The cross section of the reinforcing rib 4 is I-shaped, the thickness of each side of the I-shaped reinforcing rib 4 is the same, the top surface of the reinforcing rib 4 is flush with the top surface of the foam layer 2, and the bottom surface of the reinforcing rib 4 is flush with the bottom surface of the foam layer 2. The reinforcing ribs 4 are made of the same material as the lower plate layer 1 and the upper plate layer 3, the thickness of the lower plate layer 1 is equal to that of the upper plate layer 3, and the thickness of each I-shaped edge of each reinforcing rib 4 is not smaller than that of the lower plate layer 1.

The strengthening rib 4 is the I shape and bears the weight of the intensity higher, and the strengthening rib 4 is the same with lower sheet layer 4 and the material of higher authority sheet layer 3, and rigidity is unanimous, can effectively increase the bulk rigidity of foam sandwich panel, and the strengthening rib 4 is better with lower sheet layer 1 and the adhesion of higher authority sheet layer 3 in the forming process, changes adhesive connection, further improves the wholeness ability of foam sandwich panel. The thickness of each I-shaped edge of the reinforcing rib 4 is not less than that of the lower plate layer 1, and the strength of each I-shaped edge of the reinforcing rib 4 is not less than that of the upper and lower panel layers, so that the reinforcing rib 4 always bears the stress together with the upper and lower panel layers in the bearing process.

The top surfaces of the reinforcing ribs 4 account for 20-30% of the area of the top surface of the foam layer 2, and the proportion of the reinforcing ribs can fully meet the use requirement.

The technical solutions of the embodiments of the present invention are completely described above with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Claims

1. Foam sandwich panel, including lower sheet layer (1), foam layer (2) and above-mentioned sheet layer (3), foam layer (2) press from both sides below sheet layer (1) and above-mentioned sheet layer (3) between, its characterized in that foam layer (2) in have strengthening rib (4), the intensity of strengthening rib (4) be greater than the intensity of foam layer (2), and strengthening rib (4) run through foam layer (2) and below sheet layer (1) and above-mentioned sheet layer (3) contact.

2. The foam sandwich panel according to claim 1, characterized in that the foam layer (2) is provided with forming grooves (21) corresponding to the reinforcing ribs (4), and the reinforcing ribs (4) are formed in the forming grooves (21).

3. The foam sandwich panel according to claim 1, wherein the reinforcing ribs (4) are glass fiber composite materials formed by laminating glass fiber cloth as an additive body and epoxy resin as a matrix, and the foam layer (2) is PMI foam materials.

4. The foam sandwich panel according to claim 3, characterized in that the glass fiber cloth in the reinforcing ribs (4) is plain glass fiber cloth, and the thickness of the single layer of the glass fiber cloth is 0.2-0.3 mm.

5. The foam sandwich panel according to claim 2, characterized in that the forming grooves (21) comprise transverse grooves (21.1) arranged along the length direction of the foam layer (2) and longitudinal grooves (21.2) arranged along the width direction of the foam layer (2), and the transverse grooves (21.1) and the longitudinal grooves (21.2) are uniformly distributed at intervals and equal in number.

6. A foam sandwich panel according to claim 5, characterised in that the ends of the transverse channels (21.1) and the longitudinal channels (21.2) are located close to the edges of the foam layer (2).

7. The foam sandwich panel according to claim 2, characterized in that the cross section of the reinforcing ribs (4) is in an I shape, the thickness of each side of the I shape of the reinforcing ribs (4) is the same, the top surfaces of the reinforcing ribs (4) are flush with the top surface of the foam layer (2), and the bottom surfaces of the reinforcing ribs (4) are flush with the bottom surface of the foam layer (2).

8. The foam sandwich panel according to claim 2, characterized in that the top surface of the reinforcing ribs (4) occupies 20-30% of the area of the top surface of the foam layer (2).

9. The foam sandwich panel according to claim 7, characterized in that the reinforcing ribs (4) are made of the same material as the lower panel layer (1) and the upper panel layer (3), the lower panel layer (1) and the upper panel layer (3) have the same thickness, and the thickness of each I-shaped side of the reinforcing ribs (4) is not less than that of the lower panel layer (1).