A spoiler assembly with structural design and process optimization and a processing method thereof

Abstract

The invention provides a spoiler assembly with structural design and process optimization, comprising a lower plate, an upper plate, a flanged recessed groove and a lower parting line of the upper plate, the lower plate being composed of a short side portion and a long side portion, a side of the short side portion away from the long side portion forming a lower plate lower parting line, a side of the long side portion away from the long side portion forming an upper plate upper parting line, the upper plate being arranged above the lower plate, and the inner side surface of the upper plate being bonded to the top surface of the long side portion, an upper plate parting line being formed at the upper end of the upper plate, a plurality of flanged recessed grooves being sequentially formed on a side of the outer side of the long side portion close to the short side portion, and a folded edge portion which can be nested into the inner side of the flanged recessed groove is formed on a side of the upper plate close to the flanged recessed groove; the invention optimizes the design of the upper and lower plates of the spoiler, thereby achieving the effect of hiding the parting lines on the upper and lower plates, thereby eliminating the need to polish the upper or lower plate after demoulding, thereby greatly improving the production efficiency of the spoiler and facilitating enterprise production.

Description

Technical Field

[0001] The present invention relates to the technical field of spoilers, and in particular to a spoiler assembly with optimized structural design and process and a processing method thereof. Background Art

[0002] The spoiler is installed at the rear of the vehicle to reduce the air resistance generated by the vehicle when it is driving at high speed and to improve its appearance. The existing spoiler usually consists of two parts, an upper plate and a lower plate. The upper and lower plates are injection molded by different molds and then fastened together by snapping or bonding. Due to the limitations of mold injection molding technology, a relatively small parting line will be formed at the mold joint of the two molds after the product is demoulded. There are certain problems in the existing spoiler design. After the upper and lower plates are fastened together, the parting line of the upper plate close to the lower plate and the parting line of the lower plate close to the upper plate are usually exposed, such as Figure 1 As shown, if the parting line is exposed, it will have a certain impact on the overall aesthetics of the spoiler. At the same time, when people are installing the upper and lower plates and in the final installation process, the parting line will make people feel uncomfortable when holding the spoiler. Therefore, the manufacturer will grind the parting line after the upper and lower plates are demoulded. The grinding work greatly increases the processing time of the spoiler, reduces the production speed of the entire spoiler, and is inconvenient for the company's production.

[0003] Therefore, it is necessary to provide a spoiler assembly with a new structural design and process optimization and a processing method thereof to solve the above-mentioned technical problems. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a spoiler assembly with optimized structure design and process and a processing method thereof.

[0005] The present invention provides a spoiler assembly with structural design and process optimization, comprising a lower plate, an upper plate, a flanged recessed groove and a lower parting line of the upper plate, the lower plate being composed of a short side portion and a long side portion, a side of the short side portion away from the long side portion forming a lower plate lower parting line, a side of the long side portion away from the long side portion forming a lower plate upper parting line, the upper plate being arranged above the lower plate, and the inner side surface of the upper plate being bonded to the top surface of the long side portion, an upper plate parting line being formed at the upper end of the upper plate, a plurality of flanged recessed grooves being sequentially formed on a side of the outer side of the long side portion close to the short side portion, a folded edge portion which can be nested into the inner side of the flanged recessed groove is formed on a side of the upper plate close to the flanged recessed groove, and the folded edge portion is clamped with the flanged recessed groove, and the lower parting line of the upper plate is formed on a side of the folded edge portion close to the flanged recessed groove.

[0006] Preferably, the side walls of the long sides are sequentially formed with a plurality of ribs recessed downwards.

[0007] Preferably, a clamping slot is provided on the inner side of the flanged recessed groove, the clamping slot penetrates the long side and extends to the inner side of the long side, and a clamping block is formed on one side of the folded edge portion close to the clamping slot, and the clamping block is clamped with the clamping slot.

[0008] Preferably, a plurality of through slots are arranged at intervals on the side of the long side, and each through slot is located between two adjacent ribs, and a convex plate is formed on a side surface of the upper plate close to the long side at a position corresponding to the through slot, and the convex plate is plugged into the through slot.

[0009] Preferably, both the upper plate and the lower plate are made of modified PC+ABS material.

[0010] Preferably, a frame line is formed on the top surface of the long side portion between every two adjacent ribs.

[0011] Preferably, a reinforcing triangular plate is formed equidistantly on the inner side surface of the short side away from the junction of the short side and the long side.

[0012] Preferably, the short side, the long side, the lower part of the lower plate molding line, the upper part of the lower plate molding line, the ribs, the frame line and the reinforcing triangle plate are integrally arranged, and the upper plate, the parting line on the upper plate, the lower parting line of the upper plate, the folded edge, the block and the convex plate are integrally arranged.

[0013] The present invention also provides a spoiler processing method, which comprises the following steps:

[0014] Water channel design of the mold: The water channel design of the mold should be uniform and consistent, and the temperature difference of each part should be controlled within 5°C. If the structural design is limited, try to avoid the water channel being too long, and a single water channel should be controlled within 2m. All water channels can also be combined into long and short ones, and arranged evenly. The movable and fixed molds each have two groups of total inlet and outlet, and two chillers control the movable and fixed molds respectively.

[0015] Mold flow analysis: Through mold flow analysis, the risk of injection deformation of upper and lower plate parts can be judged and corrected to avoid the failure of the assembly size after the upper and lower plates are assembled due to deformation;

[0016] Through mold flow analysis, the weld line position and air mark position on the large surface of the upper and lower plates can be determined to avoid appearance defects of parts and cracking caused by stress concentration;

[0017] Through the water channel design of the mold, the mold water channel design is made uniform and consistent, and the temperature difference of each part is controlled within 5℃, avoiding the serious deformation of the upper and lower plate molds due to uneven cooling during injection molding;

[0018] Selection of injection molding raw materials: modified PC+ABS materials are used. Traditional PC+ABS materials have poor chemical corrosion resistance, and the internal stress of the molding substrate is prone to excessive. The solvent in the solvent-based paint is too strong, which can easily induce stress release, resulting in air marks, bubbles, and even cracks on the paint surface during the spraying and drying process. The three defects appear in a state of increasing strength.

[0019] To solve the above problems, choose modified PC+ABS material

[0020] 1. Reduce injection molding internal stress: increase the melt index of the material, generally 20-25g / 10min; increase the demoulding property of the material to avoid residual ejection demoulding stress, that is, add PETS (stearate) lubricating agent to the raw material, the addition amount is 0.2-1%;

[0021] 2. Reduce stress-induced cracking: Improve the corrosion of spray solvents by improving the chemical resistance of the material and reduce stress induction. Improve chemical resistance by increasing the cohesive energy density of the material molecular chain, usually 1.14-1.19g / cm3

[0022] Selection of paint raw materials to avoid spray marks / bubbles / cracks

[0023] The special nature of PC+ABS substrate requires the selection of a matching thinner to dilute the paint. The strength of the thinner's own solubility, the strength of its corrosiveness to the substrate, and the volatility of the thinner itself, that is, the length of time the thinner stays on the substrate, will all induce the release of stress within the substrate and damage the paint film, resulting in defects.

[0024] Solution: 1. Choose a matching thinner to dilute the paint: alcohol solvents (n-butanol, n-propanol, isopropanol), No. 100 solvent oil, cyclohexane, isobutyl isobutyrate, etc.

[0025] 2. In the production and grinding process of paint resin system and color paste system, avoid the diluents that corrode the substrate in the above screening

[0026] 3. Add some fast-evaporating thinners to speed up the evaporation rate of the entire paint and reduce the corrosion of the paint to the substrate

[0027] Injection molding production of upper and lower panels:

[0028] Control of injection molding process parameters:

[0029] The upper and lower plates are made of PC+ABS material, which has poor chemical corrosion resistance and the internal stress of the molding substrate is prone to excessive stress. The excessive solvent in the solvent-based paint can easily induce stress release, resulting in air marks, bubbles, and even cracking defects on the paint surface during the spraying and drying process. The three defects appear in a state of gradual strengthening.

[0030] 1. Drying temperature: 90-100℃, time 3-4h; the process continues to dry under this condition

[0031] 2. Material temperature: usually the material temperature is controlled at 250-260℃ at the nozzle, 265-240℃ in the middle section, and 220-230℃ at the discharge port

[0032] 3. Injection pressure: usually 90-120bar; injection time should be as short as possible (without air trapping and flash); generally 4-6s is appropriate; holding pressure should be 30%-50% of the injection pressure, and the holding time is controlled in stages, generally 2-3s in the first stage and 2-4s in the second stage;

[0033] 4. Back pressure: Use the best speed and lower back pressure in the beginning stage, lower speed and higher back pressure in the last stage to ensure the stability of pre-plasticization and consistency of product quality;

[0034] 5. The dynamic and fixed molds are controlled by a mold temperature controller, the temperature is between 40-70℃, and the temperature difference of the mold core is preferably within 5℃;

[0035] Upper and lower panels spray paint:

[0036] Paint process control

[0037] After the spoiler is sprayed, there are defects such as air marks, cracks, and bubbles. Due to the special nature of the PC+ABS substrate, a matching thinner should be selected to dilute the paint. The strength of the thinner's own solubility, the strength of its corrosiveness to the substrate, and the volatility of the thinner itself, that is, the length of time the thinner stays on the substrate, will induce the release of stress in the substrate and destroy the paint film, resulting in defects.

[0038] Solution: 1. Adjust the dryness and wetness of the primer, let the primer spray a little dry, reduce the cross-linking of the solvent and the substrate; spray the primer film to a thickness of more than 8 microns, cover the substrate as completely as possible, and spray the color paint after the primer is dry.

[0039] 2. The paint film should not be too thick, especially for white paint, to prevent defects caused by over-baking. A certain proportion of leveling agent or slow-drying agent can be added to the paint to allow the paint film to dry at a uniform speed to prevent the paint film from being dry on the outside and wet on the inside; during the paint spraying process, the aluminum powder paint can be sprayed dry by adjusting the process parameters of the paint spray gun to compensate for the uneven arrangement of aluminum powder caused by stress release.

[0040] 3. No adjustment is required for the varnish, just spray it normally.

[0041] The spoiler assembly with structural design and process optimization and the processing method thereof provided by the present invention have the following beneficial effects:

[0042] The present invention optimizes the design of the upper and lower plates of the spoiler by forming a flanged recessed groove on the long side and designing the lower end of the upper plate to be a folded edge portion that is recessed toward the inner side of the flanged recessed groove. After the upper plate and the lower plate are buckled together, the folded edge portion can be nested into the inner side of the flanged recessed groove, thereby hiding the lower parting line of the upper plate and avoiding exposure of the lower parting line of the upper plate. At the same time, the lower parting line of the lower plate, the upper parting line of the lower plate and the parting line of the upper plate are all located on the side of the spoiler close to the vehicle when the entire spoiler is installed on the vehicle, thereby preventing the lower parting line of the lower plate, the upper parting line of the lower plate and the parting line of the upper plate from being exposed. Therefore, the lower parting line of the lower plate, the upper parting line of the lower plate and the parting line of the upper plate are also not exposed, thereby reducing the grinding process in the production process of the spoiler, thereby improving the production efficiency of the spoiler.

[0043] 1. The present invention adopts modified PC+ABS material to make the spoiler, thereby reducing the injection molding internal stress and reducing the occurrence of stress-induced cracking.

[0044] 2. Through optimized materials, paint definition, optimized injection molding process, and paint process, the appearance quality of the spoiler upper and lower panels is improved, and the product qualification rate is improved; through optimized structural design and mold design, the problem of industrial batch grinding parting line is avoided, saving time and effort. Through optimized structural design, gluing and snap connection, the gluing and bonding area is saved, saving costs. Through optimized structural design, mold design, tooling equipment, etc., the size compliance and stability of the spoiler assembly are guaranteed, and the product meets the size requirements of customers for vehicle installation, which summarizes valuable experience for the design and development of similar injection-molded spoiler assemblies in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0046] Figure 2 It is a schematic diagram of the structure of the lower part of the lower plate of the present invention;

[0047] Figure 3 It is a schematic diagram of the frame line position structure of the present invention;

[0048] Figure 4 It is a schematic diagram of the card slot position structure of the present invention;

[0049] Figure 5 It is an enlarged view of point A of the present invention;

[0050] Figure 6 It is a schematic diagram of the structure of the convex plate position of the present invention;

[0051] Figure 7 It is a schematic diagram of the structure of the position of the mold line of the upper part of the lower plate of the present invention;

[0052] Figure 8 It is a schematic diagram of the overall structure of the method of the present invention.

[0053] Numbers in the figure: 1, lower plate; 101, short side; 102, long side; 102a, flanged recessed groove; 102b, rib; 2, lower part mold line of lower plate; 3, upper part mold line of lower plate; 4, upper plate; 4a, folded edge; 5, parting line of upper plate; 6, slot; 7, block; 8, through slot; 9, convex plate; 10, frame line; 11, reinforcement triangle plate; 12, lower parting line of upper plate. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0055] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0056] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The embodiment of the present invention provides a spoiler assembly with structural design and process optimization, including a lower plate 1, an upper plate 4, a flanged concave groove 102a and an upper plate lower parting line 12. The lower plate 1 is composed of a short side 101 and a long side 102. The side of the short side 101 away from the long side 102 forms a lower plate lower parting line 2, and the side of the long side 102 away from the long side 102 forms a lower plate upper parting line 3. The upper plate 4 is arranged above the lower plate 1, and the inner side of the upper plate 4 It is bonded to the top surface of the long side portion 102, and an upper plate parting line 5 is formed at the upper end of the upper plate 4. Several flanged recessed grooves 102a are sequentially formed on the outer side of the long side portion 102 close to the short side portion 101. A folded edge portion 4a which can be nested into the inner side of the flanged recessed groove 102a is formed on the side of the upper plate 4 close to the flanged recessed groove 102a, and the folded edge portion 4a is clamped with the flanged recessed groove 102a, and an upper plate lower parting line 12 is formed on the side of the folded edge portion 4a close to the flanged recessed groove 102a.

[0057] After the upper plate 4 is bonded to the lower plate 1, the folded edge portion 4a is in a state of being nested in the inner side of the flange recessed groove 102a, thereby hiding the lower parting line 12 of the upper plate and avoiding exposure of the lower parting line 12 of the upper plate. At the same time, after the entire spoiler is installed on the vehicle, the lower parting line 2 of the lower plate, the upper parting line 3 of the lower plate and the parting line 5 of the upper plate are all in a position close to the outer side of the vehicle, thereby making the lower parting line 2 of the lower plate, the upper parting line 3 of the lower plate and the parting line 5 of the upper plate hidden and not exposed, thereby effectively hiding all the parting lines, and thus there is no need to grind the parting lines during the production of the spoiler, thereby improving the production efficiency of the spoiler.

[0058] See also Figure 2 and Figure 3 The side walls of the long side portion 102 are sequentially formed with a plurality of downwardly recessed ribs 102 b, which can improve the strength of the long side portion 102 .

[0059] See also Figure 4 , Figure 5 and Figure 6 A card slot 6 is provided on the inner side of the flange recessed groove 102a, and the card slot 6 passes through the long side portion 102 and extends to the inner side of the long side portion 102. A card block 7 is formed on the side of the folded edge portion 4a close to the card slot 6. The card block 7 is engaged with the card slot 6, so that the upper plate 4 and the lower plate 1 can be engaged together, so that the upper plate 4 and the lower plate 1 can be in a relatively stable state when bonding, and the bonding method can effectively improve the strength of the connection between the upper plate 4 and the lower plate 1.

[0060] See also Figure 2 and Figure 7 A plurality of through grooves 8 are arranged at intervals on the side of the long side 102, and each through groove 8 is located between two adjacent ribs 102b. A convex plate 9 is formed on a side of the upper plate 4 close to the long side 102 at a position corresponding to the through groove 8, and the convex plate 9 is plugged into the through groove 8. The through groove 8 and the convex plate 9 can improve the shear resistance performance of the connection between the upper plate 4 and the lower plate 1 after the two are assembled, thereby further improving the firmness of the connection between the two.

[0061] See also Figure 1 The upper plate 4 and the lower plate 1 are both made of modified PC+ABS material, which can reduce the internal stress of injection molding and reduce the occurrence of stress-induced cracking.

[0062] See also Figure 3 A frame line 10 is formed between each two adjacent ribs 102 b on the top surface of the long side portion 102 , which can increase the contact area between the glue and the long side portion 102 , thereby further increasing the bonding strength between the upper and lower panels 1 .

[0063] See also Figure 2A reinforcing triangular plate 11 is formed equidistantly on the inner side surface of the short side 101 away from the junction of the short side 101 and the long side 102 , so as to improve the mechanical strength of the short side 101 .

[0064] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The short side 101, the long side 102, the lower part mold line 2 of the lower plate, the upper part mold line 3 of the lower plate, the rib 102b, the frame line 10 and the reinforcing triangle plate 11 are integrally arranged, and the upper plate 4, the parting line 5 on the upper plate, the lower parting line 12 of the upper plate, the folding edge 4a, the block 7 and the convex plate 9 are integrally arranged.

[0065] The present invention also provides a spoiler processing method, which comprises the following steps:

[0066] Water channel design of the mold: The water channel design of the mold should be uniform and consistent, and the temperature difference of each part should be controlled within 5°C. If the structural design is limited, try to avoid the water channel being too long, and a single water channel should be controlled within 2m. All water channels can also be combined into long and short ones, and arranged evenly. The movable and fixed molds each have two groups of total inlet and outlet, and two chillers control the movable and fixed molds respectively.

[0067] Mold flow analysis: Through mold flow analysis, the risk of injection deformation of upper and lower plate parts can be judged and corrected to avoid the failure of the assembly size after the upper and lower plates are assembled due to deformation;

[0068] Through mold flow analysis, the weld line position and air mark position on the large surface of the upper and lower plates can be determined to avoid appearance defects of parts and cracking caused by stress concentration;

[0069] Through the water channel design of the mold, the mold water channel design is made uniform and consistent, and the temperature difference of each part is controlled within 5℃, avoiding the serious deformation of the upper and lower plate molds due to uneven cooling during injection molding;

[0070] Selection of injection molding raw materials: modified PC+ABS materials are used. Traditional PC+ABS materials have poor chemical corrosion resistance, and the internal stress of the molding substrate is prone to excessive. The solvent in the solvent-based paint is too strong, which can easily induce stress release, resulting in air marks, bubbles, and even cracks on the paint surface during the spraying and drying process. The three defects appear in a state of increasing strength.

[0071] To solve the above problems, choose modified PC+ABS material

[0072] 1. Reduce injection molding internal stress: increase the melt index of the material, generally 20-25g / 10min; increase the demoulding property of the material to avoid residual ejection demoulding stress, that is, add PETS (stearate) lubricating agent to the raw material, the addition amount is 0.2-1%;

[0073] 2. Reduce stress-induced cracking: Improve the corrosion of spray solvents by improving the chemical resistance of the material and reduce stress induction. Improve chemical resistance by increasing the cohesive energy density of the material molecular chain, usually 1.14-1.19g / cm3

[0074] Selection of paint raw materials to avoid spray marks / bubbles / cracks

[0075] The special nature of PC+ABS substrate requires the selection of a matching thinner to dilute the paint. The strength of the thinner's own solubility, the strength of its corrosiveness to the substrate, and the volatility of the thinner itself, that is, the length of time the thinner stays on the substrate, will all induce the release of stress within the substrate and damage the paint film, resulting in defects.

[0076] Solution: 1. Choose a matching thinner to dilute the paint: alcohol solvents (n-butanol, n-propanol, isopropanol), No. 100 solvent oil, cyclohexane, isobutyl isobutyrate, etc.

[0077] 2. In the production and grinding process of paint resin system and color paste system, avoid the diluents that corrode the substrate in the above screening

[0078] 3. Add some fast-evaporating thinners to speed up the evaporation rate of the entire paint and reduce the corrosion of the paint to the substrate

[0079] Injection molding production of upper and lower panels:

[0080] Control of injection molding process parameters:

[0081] The upper and lower plates are made of PC+ABS material, which has poor chemical corrosion resistance and the internal stress of the molding substrate is prone to excessive stress. The excessive solvent in the solvent-based paint can easily induce stress release, resulting in air marks, bubbles, and even cracking defects on the paint surface during the spraying and drying process. The three defects appear in a state of gradual strengthening.

[0082] 1. Drying temperature: 90-100℃, time 3-4h; the process continues to dry under this condition

[0083] 2. Material temperature: usually the material temperature is controlled at 250-260℃ at the nozzle, 265-240℃ in the middle section, and 220-230℃ at the discharge port

[0084] 3. Injection pressure: usually 90-120bar; injection time should be as short as possible (without air trapping and flash); generally 4-6s is appropriate; holding pressure should be 30%-50% of the injection pressure, and the holding time is controlled in stages, generally 2-3s in the first stage and 2-4s in the second stage;

[0085] 4. Back pressure: Use the best speed and lower back pressure in the beginning, lower speed and higher back pressure in the last stage to ensure the stability of pre-plasticization and consistency of product quality;

[0086] 5. The dynamic and fixed molds are controlled by a mold temperature controller, the temperature is between 40-70℃, and the temperature difference of the mold core is preferably within 5℃;

[0087] Upper and lower panels spray paint:

[0088] Paint process control

[0089] After the spoiler is sprayed, there are defects such as air marks, cracks, and bubbles. Due to the special nature of the PC+ABS substrate, a matching thinner should be selected to dilute the paint. The strength of the thinner's own solubility, the strength of its corrosiveness to the substrate, and the volatility of the thinner itself, that is, the length of time the thinner stays on the substrate, will induce the release of stress in the substrate and destroy the paint film, resulting in defects.

[0090] Solution: 1. Adjust the dryness and wetness of the primer, let the primer spray a little dry, reduce the cross-linking of the solvent and the substrate; spray the primer film to a thickness of more than 8 microns, cover the substrate as completely as possible, and spray the color paint after the primer is dry.

[0091] 2. The paint film should not be too thick, especially for white paint, to prevent defects caused by over-baking. A certain proportion of leveling agent or slow-drying agent can be added to the paint to allow the paint film to dry at a uniform speed to prevent the paint film from being dry on the outside and wet on the inside; during the paint spraying process, the aluminum powder paint can be sprayed dry by adjusting the process parameters of the paint spray gun to compensate for the uneven arrangement of aluminum powder caused by stress release.

[0092] 3. The varnish can be sprayed normally without adjustment. Finally, the tooling equipment is placed to press the product and heat to cure the glue.

[0093] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A spoiler assembly, characterized in that: include: A lower plate (1), the lower plate (1) comprising a short side portion (101) and a long side portion (102), a lower plate lower part profile line (2) being formed on a side of the short side portion (101) away from the long side portion (102), an upper plate upper profile line (3) being formed on a side of the long side portion (102) away from the short side portion (101), and an edge of the long side portion (102) being joined to an edge of the short side portion (101); An upper plate (4), the upper plate (4) being arranged above the lower plate (1), and the inner side surface of the upper plate (4) being bonded to the top surface of the long side portion (102), and an upper plate parting line (5) being formed at the upper end of the upper plate (4); A flanged recessed groove (102a), wherein a plurality of the flanged recessed grooves (102a) are sequentially formed on the side of the outer side of the long side portion (102) close to the short side portion (101), and a folded edge portion (4a) which can be nested into the inner side of the flanged recessed groove (102a) is formed on the side of the upper plate (4) close to the flanged recessed groove (102a), and the folded edge portion (4a) is snap-connected with the flanged recessed groove (102a); The upper plate lower parting line (12) is formed on one side of the folded edge portion (4a) close to the flanged recessed groove (102a). After the spoiler is installed on the vehicle, the lower plate lower parting line (2), the lower plate upper parting line (3) and the upper plate upper parting line (5) are all in close contact with the outer side of the vehicle.

2. The spoiler assembly according to claim 1, characterized in that: A plurality of ribs (102b) recessed downwards are sequentially formed on the side walls of the long side portion (102).

3. The spoiler assembly according to claim 2, characterized in that: A clamping groove (6) is provided on the inner side of the flanged recessed groove (102a), and the clamping groove (6) penetrates the long side portion (102) and extends to the inner side of the long side portion (102). A clamping block (7) is formed on one side of the folded edge portion (4a) close to the clamping groove (6), and the clamping block (7) is clamped with the clamping groove (6).

4. The spoiler assembly according to claim 3, characterized in that: A plurality of through slots (8) are arranged at intervals on the side of the long side portion (102), and each through slot (8) is located between two adjacent ribs (102b). A convex plate (9) is formed on a side surface of the upper plate (4) close to the long side portion (102) at a position corresponding to the through slot (8), and the convex plate (9) is plugged into the through slot (8).

5. The spoiler assembly according to claim 1, characterized in that: The upper plate (4) and the lower plate (1) are both made of modified PC+ABS material.

6. The spoiler assembly according to claim 4, characterized in that: A frame line (10) is formed on the top surface of the long side portion (102) between each two adjacent ribs (102b).

7. The spoiler assembly according to claim 6, characterized in that: A reinforcing triangular plate (11) is formed equidistantly on the inner side surface of the short side portion (101) away from the junction of the short side portion (101) and the long side portion (102).

8. The spoiler assembly according to claim 7, characterized in that: The short side (101), the long side (102), the lower plate lower parting line (2), the lower plate upper parting line (3), the rib (102b), the frame line (10) and the reinforcing triangular plate (11) are integrally arranged, and the upper plate (4), the upper plate parting line (5), the upper plate lower parting line (12), the folded edge (4a), the clamping block (7) and the convex plate (9) are integrally arranged.

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