High-strength light-weight carriage plate and preparation method thereof

Abstract

The invention belongs to the technical field of preparation of carriage plates, and discloses a high-strength light-weight carriage plate and a preparation method thereof. The carriage plate comprises a first panel layer, a second panel layer, a sandwich layer and a framework supporting layer, wherein the sandwich layer is formed by stacking one foam layer or more than two foam layers, and each foam layer is formed by mutually splicing a plurality of foam blocks; and the skeleton supporting layer is made of a foamed resin matrix composite material. The hollow microspheres added in the skeleton supporting structure endow the skeleton supporting structure with the characteristics of high mechanical strength and light weight, and successful foaming of the expandable microsphere foaming agent promotes the plate to have a flatter and smoother surface, so the prepared plate has excellent impact resistance and compression resistance and good appearance; meanwhile, the composite foam premix is sprayed on the surface of the foam block in advance, so that the wetting degree of the sandwich layer is greatly improved, the bonding strength of the plate is enhanced, and the plate has more stable and excellent mechanical properties.

Description

technical field

[0001] The invention belongs to the technical field of preparation of carriage boards, and in particular relates to a high-strength and lightweight carriage board and a preparation method thereof. Background technique

[0002] In the case of ensuring a certain mechanical strength, if the car is lightweight, the power utilization rate and acceleration performance of the car will be improved, and the braking distance will also be reduced due to the small inertia during a collision. In addition, the lightweight of automobiles can also achieve the benefits of energy saving and environmental protection. Therefore, the lightweight of automobiles is a hot topic in the research of the automobile industry and new material industry. With the deepening of research, lightweight boxes have emerged as the times require.

[0003] At present, lightweight box panels are generally composed of a panel layer, a skeleton support layer and a sandwich layer. Fiber-reinforced compo...

Examples

Embodiment 1

[0040] Such as figure 1 Shown, a kind of high-strength lightweight car panel, comprises first panel layer 1, second panel layer 2, sandwich layer, skeleton support layer 4, and described sandwich layer is a layer of foam layer, and this foam layer is made of several The cuboid foam blocks 3 are spliced ​​together; the sandwich layer is arranged between the first panel layer 1 and the second panel layer 2, between the lower surface of the sandwich layer and the first panel layer 1, the upper surface of the sandwich layer and Between the second panel layer 2, the surrounding (front, back, left, and right) edges of the sandwich layer, and the joints of any two adjacent foam blocks 3 in the sandwich layer are integrally solidified and filled with a skeleton support layer 4; the skeleton support layer 4 and the second A panel layer 1 and a second panel layer 2 are integrally cured and molded; the first panel layer 1 and the second panel layer 2 are both glass fiber reinforced unsat...

Embodiment 2

[0049] A high-strength and lightweight car panel, the structure of which is different from that of Example 1 is that the skeleton support layer 4 is a foamed resin-based composite material, and the foamed resin-based composite material is unsaturated polyester resin and hollow Glass microspheres are obtained by curing; the difference between the preparation method and Example 1 is that no expandable microsphere foaming agent is added in step (1), and the composite foam premix is ​​unsaturated polyester resin, hollow glass microspheres , curing agent and accelerator are obtained by mixing in a mass ratio of 100:20:20:2.

[0050] The density of the compartment board prepared in this embodiment is 0.26 g / cm 3 , with a compressive strength of 4.7 M pa.

Embodiment 3

[0052] A high-strength and lightweight vehicle box panel, the structure is different from that of Example 1 in that: the skeleton support layer 4 is a foamed resin-based composite material, and the foamed resin-based composite material is unsaturated polyester resin and The expansion microsphere foaming agent is obtained by curing; the difference between the preparation method and Example 1 is that no hollow glass microspheres are added in step (1), and the composite foam premix is ​​unsaturated polyester resin, expandable microspheres The foaming agent, the curing agent and the accelerator are mixed in a mass ratio of 100:2:20:2.

[0053] The density of the compartment board prepared in this embodiment is 0.27 g / cm 3 , with a compressive strength of 4.5 M pa.

technical field

[0001] The invention belongs to the technical field of preparation of carriage boards, and in particular relates to a high-strength and lightweight carriage board and a preparation method thereof. Background technique

[0002] In the case of ensuring a certain mechanical strength, if the car is lightweight, the power utilization rate and acceleration performance of the car will be improved, and the braking distance will also be reduced due to the small inertia during a collision. In addition, the lightweight of automobiles can also achieve the benefits of energy saving and environmental protection. Therefore, the lightweight of automobiles is a hot topic in the research of the automobile industry and new material industry. With the deepening of research, lightweight boxes have emerged as the times require.

[0003] At present, lightweight box panels are generally composed of a panel layer, a skeleton support layer and a sandwich layer. Fiber-reinforced compo...

Examples

Embodiment 1

[0040] Such as figure 1 Shown, a kind of high-strength lightweight car panel, comprises first panel layer 1, second panel layer 2, sandwich layer, skeleton support layer 4, and described sandwich layer is a layer of foam layer, and this foam layer is made of several The cuboid foam blocks 3 are spliced ​​together; the sandwich layer is arranged between the first panel layer 1 and the second panel layer 2, between the lower surface of the sandwich layer and the first panel layer 1, the upper surface of the sandwich layer and Between the second panel layer 2, the surrounding (front, back, left, and right) edges of the sandwich layer, and the joints of any two adjacent foam blocks 3 in the sandwich layer are integrally solidified and filled with a skeleton support layer 4; the skeleton support layer 4 and the second A panel layer 1 and a second panel layer 2 are integrally cured and molded; the first panel layer 1 and the second panel layer 2 are both glass fiber reinforced unsat...

Embodiment 2

[0049] A high-strength and lightweight car panel, the structure of which is different from that of Example 1 is that the skeleton support layer 4 is a foamed resin-based composite material, and the foamed resin-based composite material is unsaturated polyester resin and hollow Glass microspheres are obtained by curing; the difference between the preparation method and Example 1 is that no expandable microsphere foaming agent is added in step (1), and the composite foam premix is ​​unsaturated polyester resin, hollow glass microspheres , curing agent and accelerator are obtained by mixing in a mass ratio of 100:20:20:2.

[0050] The density of the compartment board prepared in this embodiment is 0.26 g / cm 3 , with a compressive strength of 4.7 M pa.

Embodiment 3

[0052] A high-strength and lightweight vehicle box panel, the structure is different from that of Example 1 in that: the skeleton support layer 4 is a foamed resin-based composite material, and the foamed resin-based composite material is unsaturated polyester resin and The expansion microsphere foaming agent is obtained by curing; the difference between the preparation method and Example 1 is that no hollow glass microspheres are added in step (1), and the composite foam premix is ​​unsaturated polyester resin, expandable microspheres The foaming agent, the curing agent and the accelerator are mixed in a mass ratio of 100:2:20:2.

[0053] The density of the compartment board prepared in this embodiment is 0.27 g / cm 3 , with a compressive strength of 4.5 M pa.

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