A recyclable thermoplastic resin matrix smc material structural member

Abstract

The utility model provides a kind of recyclable thermoplastic resin matrix SMC material structural member, it solves the problem of insufficient resin matrix adhesion strength etc., it includes recyclable thermoplastic SMC mould pressing forming upper panel and lower panel, the opposite side of upper panel and lower panel is distributed with adhesion grid and the other side is smooth plane, the adhesion grid of upper panel and lower panel is fixed with the core material of PP material by hot pressing, and the core material adopts honeycomb structure.The utility model has the advantages of high bonding strength, good structural performance etc.

Description

Technical Field

[0001] This utility model belongs to the technical field of thermoplastic structural parts, specifically relating to a structural part made of recyclable thermoplastic resin matrix SMC material. Background Technology

[0002] Sheet molding compound (SMC) is a high-performance composite material widely used in the automotive, construction, and electronics industries. Traditional SMC materials typically use thermosetting resins as the matrix. While these materials possess excellent mechanical properties and heat resistance, their non-recyclability leads to resource waste and environmental pollution. To improve recyclability, existing SMC materials use thermoplastic resins and other materials as the matrix. However, a significant amount of thermosetting colloid is still required as a bonding layer during the actual pressing process.

[0003] To address the shortcomings of existing technologies, people have conducted long-term research and proposed various solutions. For example, Chinese patent literature discloses a molded composite board and its facing material [87102000], whose base layer is composed of thermosetting plastic filler, fibers, and common additives. There are two additional layers on one side of this base layer: an intermediate layer and a surface layer. The intermediate layer is closely attached to the base layer and contains at least fiber reinforcement and partially cured thermosetting plastic. The surface layer contains the same or different thermosetting plastic, but its degree of curing is lower than that of the first layer.

[0004] The above solution has solved the problem of low recycling rate of SMC boards to some extent, but it still has many shortcomings, such as the need for thermosetting resin for bonding. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a reasonably designed structural component made of recyclable thermoplastic resin matrix SMC material that does not require thermosetting resin bonding.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a recyclable thermoplastic resin matrix SMC material structural component, comprising an upper panel and a lower panel molded from recyclable thermoplastic SMC, wherein an adhesive mesh is distributed on one side of the upper panel and the lower panel and the other side is a smooth plane, and a PP material core material is hot-pressed to the adhesive mesh of the upper panel and the lower panel, the core material adopting a honeycomb structure.

[0007] In the above-mentioned recyclable thermoplastic resin matrix SMC material structural component, the adhesive mesh includes adhesive strips in a matrix frame structure. An adhesive platform is provided at the center of the frame composed of adhesive strips. The adhesive strips and the adhesive platform are isolated from each other. The cross-sections of the adhesive strips and the adhesive platform are trapezoidal, and the width of one end closer to the upper panel or the lower panel is smaller than the width of the other end.

[0008] In the above-mentioned recyclable thermoplastic resin matrix SMC material structural component, the core material includes stacked core layers and has at least one core layer. The core layer has a honeycomb-shaped cavity with a closed structure. The outer surface of the core layer is bonded to the adhesive mesh and hot-pressed into the adhesive strip and adhesive platform.

[0009] In the above-mentioned recyclable thermoplastic resin matrix SMC material structural component, the thickness of the upper panel is 2±0.2mm.

[0010] In the above-mentioned recyclable thermoplastic resin matrix SMC material structural component, the core material thickness is 1-2mm.

[0011] In the above-mentioned recyclable thermoplastic resin matrix SMC material structural component, the thickness of the lower panel is 2.5±0.2mm.

[0012] In the above-mentioned recyclable thermoplastic resin matrix SMC material structural component, reinforcing ribs and mounting seats are molded at the edges of the upper panel and the lower panel. The reinforcing ribs and mounting seats extend along the edge direction of the upper panel or the lower panel, and the cross-section of the mounting seat is stepped.

[0013] In the above-mentioned recyclable thermoplastic resin matrix SMC material structural component, the upper panel and the lower panel are equipped with splicing components, and a sealing component is provided between the core material and the splicing components.

[0014] In the above-mentioned recyclable thermoplastic resin matrix SMC material structural component, the splicing assembly includes a splicing strip, and clamping grooves are opened on both sides of the splicing strip to fit and press against the upper panel and the lower panel. Threaded parts are installed on the splicing strip to adjust the width of the clamping grooves. Buckles that interlock are provided between the inner side of the clamping groove and the reinforcing rib and the mounting base.

[0015] In the above-mentioned recyclable thermoplastic resin matrix SMC material structural component, the sealing assembly includes a sealing groove with a clamping groove inside, the sealing groove being filled with a rubber sealing strip, and the sealing strip being pressed and adhered to the core material.

[0016] Compared with existing technologies, the advantages of this utility model are as follows: the adhesive mesh of the upper and lower panels is bonded and fixed to the core material by hot pressing, which can ensure the structural bonding stability without the need for thermosetting adhesive; the core material has a built-in honeycomb structure, and the thickness can be adjusted by stacking, which improves the overall pressure bearing capacity and bending deformation resistance of the structural components; the structural components are combined by splicing components, and can be assembled and expanded as needed. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the lower panel of this utility model; Figure 3 This is a partial schematic diagram of the lower panel of this utility model; Figure 4 This is a partial sectional view of the present invention; In the figure, the top panel is 1, the reinforcing rib is 11, the mounting base is 12, the bottom panel is 2, the adhesive mesh is 3, the adhesive strip is 31, the adhesive platform is 32, the smooth surface is 4, the core material is 5, the core layer is 51, the cavity is 52, the splicing component is 6, the splicing strip is 61, the clamping groove is 62, the buckle is 63, the sealing groove is 64, and the sealing strip is 65. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1-4 As shown, a structural component made of recyclable thermoplastic resin matrix SMC material includes an upper panel 1 and a lower panel 2 molded from recyclable thermoplastic SMC. The resin matrix is ​​typically made of recyclable materials such as polypropylene, polyethylene, or thermoplastic polyester. An adhesive mesh 3 is distributed on one side of the upper panel 1 and the lower panel 2, while the other side is a smooth plane 4. This smooth plane 4 constitutes the appearance surface of the structural component and has good surface quality. A PP core material 5 is hot-pressed to the adhesive mesh 3 of the upper panel 1 and the lower panel 2. The core material 5 adopts a honeycomb structure to ensure lightweight and high specific strength.

[0020] Specifically, the adhesive mesh 3 includes adhesive strips 31 in a matrix frame structure, which increases the contact and bonding area with the core material 5. An adhesive platform 32 is located at the center of the frame formed by the adhesive strips 31, and the adhesive strips 31 and the adhesive platform 32 are isolated. This isolation area helps guide air and excess resin out during hot pressing, preventing the formation of air bubbles. The cross-sections of the adhesive strips 31 and the adhesive platform 32 are trapezoidal, with the width at one end closer to the upper panel 1 or the lower panel 2 being smaller than the width at the other end. This creates an anchoring effect during hot pressing, preventing detachment and significantly improving the interfacial bonding strength.

[0021] Specifically, the core material 5 includes stacked core layers 51, with at least one core layer 51, and the structural thickness and layering can be flexibly adjusted according to mechanical performance requirements. The core layer 51 has honeycomb-shaped, closed cavities 52 to ensure compressive and bending stiffness. The outer surface of the core layer 51 is bonded to the adhesive mesh 3 and hot-pressed with the adhesive strip 31 and adhesive platform 32. During the hot-pressing process, some material on the surface of the core material 5 melts and interlocks with the adhesive mesh 3, forming a strong mechanical interlock and material fusion connection.

[0022] Furthermore, the thickness of the upper panel 1 is 2±0.2mm, which can achieve material saving and lightweighting while ensuring in-plane stiffness and impact strength.

[0023] Furthermore, the core material 5 has a thickness of 1-2mm, which balances the bending stiffness and weight of the overall structure.

[0024] In addition, the bottom panel 2 is 2.5±0.2mm thick, which is slightly thicker than the top panel 1. The bottom panel 2 is used as the main load-bearing surface to withstand greater compressive and bending stress.

[0025] Meanwhile, reinforcing ribs 11 and mounting bases 12 are molded at the edges of the upper panel 1 and the lower panel 2. The reinforcing ribs 11 significantly improve the bending and torsional resistance of the edge area. The reinforcing ribs 11 and mounting bases 12 extend along the edge direction of the upper panel 1 or the lower panel 2. The mounting base 12 has a stepped cross-section, which facilitates alignment and fixation with adjacent structures or mounting foundations, improving the convenience and accuracy of assembly.

[0026] As can be seen, the upper panel 1 and the lower panel 2 are equipped with splicing components 6 for rapid expansion and connection between multiple structural components. A sealing component is provided between the core material 5 and the splicing components 6 to ensure airtightness and watertightness at the connection point and prevent moisture from penetrating the core layer.

[0027] Clearly, the splicing assembly 6 includes a splicing strip 61. The splicing strip 61 has clamping grooves 62 on both sides that fit and press against the upper panel 1 and the lower panel 2. The inner contour of the clamping grooves 62 matches the shape of the reinforcing ribs 11 and the mounting base 12 on the panel edge. Threaded parts are installed on the splicing strip 61 to adjust the width of the clamping grooves 62. A strong clamping force is generated by tightening the bolts. Interlocking buckles 63 are provided between the inner side of the clamping grooves 62 and the reinforcing ribs 11 and the mounting base 12. The buckle 63 provides pre-fixation before final locking to prevent slippage and facilitate installation positioning.

[0028] Preferably, the sealing assembly includes a sealing groove 64 formed inside the clamping groove 62, and a sealing strip 65 made of rubber is filled inside the sealing groove 64. The sealing strip 65 is made of EPDM rubber or silicone rubber, which has good weather resistance and elasticity. The sealing strip 65 is pressed tightly against the core material 5, tightly filling all assembly gaps.

[0029] In summary, the principle of this embodiment is as follows: by hot pressing, the core material 5, which has a closed honeycomb cavity 52 inside, is integrated with the recyclable thermoplastic SMC upper panel 1 and lower panel 2, which have inverted trapezoidal cross-section adhesive grids 3 with mechanical anchoring effect on both the upper and lower surfaces. Through the isolation matrix frame 31 in the adhesive grid 3 and the central adhesive platform 32, the core material 5 and the panel are simultaneously melt-fitted over a large area and mechanically interlocked due to the trapezoidal cross-section during the hot pressing process.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0031] Although this document frequently uses terms such as top panel 1, reinforcing rib 11, mounting base 12, bottom panel 2, adhesive mesh 3, adhesive strip 31, adhesive platform 32, smooth surface 4, core material 5, core layer 51, cavity 52, splicing assembly 6, splicing strip 61, clamping groove 62, buckle 63, sealing groove 64, and sealing strip 65, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A structural component made of recyclable thermoplastic resin matrix SMC material, comprising an upper panel (1) and a lower panel (2) molded from recyclable thermoplastic SMC, wherein the upper panel (1) and the lower panel (2) have an adhesive mesh (3) distributed on one side opposite to each other and the other side is a smooth plane (4), characterized in that, The upper panel (1) and the lower panel (2) are bonded to a core material (5) made of PP material by hot pressing. The core material (5) adopts a honeycomb structure.

2. A recyclable thermoplastic resin-based SMC material structural component according to claim 1, characterized in that, The adhesive mesh (3) includes adhesive strips (31) in a matrix frame structure. An adhesive platform (32) is provided at the center of the frame composed of the adhesive strips (31). The adhesive strips (31) and the adhesive platform (32) are isolated from each other. The cross sections of the adhesive strips (31) and the adhesive platform (32) are trapezoidal, and the width of one end near the upper panel (1) or the lower panel (2) is smaller than the width of the other end.

3. A recyclable thermoplastic resin-based SMC material structural component according to claim 2, characterized in that, The core material (5) includes stacked core layers (51) and has at least one core layer (51). The core layer (51) has a cavity (52) arranged in a honeycomb pattern and having a closed structure. The outer surface of the core layer (51) is bonded to the adhesive mesh (3) and hot-pressed into the adhesive strip (31) and the adhesive platform (32).

4. A recyclable thermoplastic resin-based SMC material structural component according to claim 1, characterized in that, The thickness of the upper panel (1) is 2±0.2mm.

5. A recyclable thermoplastic resin-based SMC material structural component according to claim 1, characterized in that, The core material (5) has a thickness of 1-2 mm.

6. A recyclable thermoplastic resin-based SMC material structural component according to claim 1, characterized in that, The thickness of the lower panel (2) is 2.5±0.2mm.

7. A recyclable thermoplastic resin-based SMC material structural component according to claim 1, characterized in that, The upper panel (1) and the lower panel (2) are molded with reinforcing ribs (11) and mounting bases (12) at their edges. The reinforcing ribs (11) and mounting bases (12) extend along the edge direction of the upper panel (1) or the lower panel (2). The mounting base (12) has a stepped cross-section.

8. A recyclable thermoplastic resin-based SMC material structural component according to claim 7, characterized in that, The upper panel (1) and the lower panel (2) are equipped with splicing components (6), and a sealing component is provided between the core material (5) and the splicing components (6).

9. A recyclable thermoplastic resin-based SMC material structural component according to claim 8, characterized in that, The splicing component (6) includes a splicing strip (61). The splicing strip (61) has clamping grooves (62) on both sides that fit and press against the upper panel (1) and the lower panel (2). The splicing strip (61) is equipped with threaded parts to adjust the width of the clamping groove (62). The inner side of the clamping groove (62) is provided with buckles (63) that engage with each other between the reinforcing rib (11) and the mounting base (12).

10. A recyclable thermoplastic resin-based SMC material structural component according to claim 9, characterized in that, The sealing assembly includes a sealing groove (64) with a clamping groove (62) inside, and a sealing strip (65) made of rubber is filled in the sealing groove (64). The sealing strip (65) is pressed and adhered to the core material (5).

Images