Automobile engine hood and preparation system

Abstract

The utility model relates to an automobile engine hood and a preparation system, belongs to the field of automobile part products, and solves the problems that the existing non-polar thermoplastic plate is poor in bonding capacity with a paint film, the modification process automation of a non-polar thermoplastic material for preparing the automobile engine hood cannot be realized in the prior art, the spraying modification process is open, the environment is polluted, and the production cost is low. The modified spraying uniformity of the non-polar thermoplastic material is poor, and the like. An automobile engine hood preparation system comprises a non-polar thermoplastic material modification system, a mechanical arm and a mold pressing paint injection system. The non-polar thermoplastic material modification system comprises a modification spraying cabin, a medicament storage and conveying system and a blow-drying system; and the modified spraying cabin comprises a spraying cabin main body, a water collecting tank arranged in the spraying cabin main body, a placing table arranged in the center of the water collecting tank and a plate fixing device arranged on the upper surface of the placing table. The automobile engine hood is resistant to impact and high in bearing capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile component engine hood products, in particular to an automobile engine hood and a preparation system thereof. Background Art

[0002] As an important part of the car, the car hood not only protects the engine and provides airflow dynamics, but is also a key element of the car's exterior design. With the development of material science and manufacturing technology, the material of the hood is also constantly improving to meet the needs of lightweight, energy saving, environmental protection and performance improvement.

[0003] In the automotive parts manufacturing sector, the green, low-carbon, high-quality, and efficient manufacturing of composite materials is an inevitable development trend. Under the hood, the use of thermoplastics can reduce weight by 30% to 40% compared to metal materials, while also lowering costs. Non-polar thermoplastic sheets are widely favored by the industry for their affordability and excellent processing properties. Their excellent mechanical properties, including high strength, hardness, and toughness, make them ideal for producing impact-resistant and load-bearing automotive parts. However, their low surface energy and inherently non-polar molecular chains result in poor adhesion to paint films, affecting the coating's adhesion to the substrate.

[0004] Combined with the urgent demand for new environmentally friendly coating processes, the integrated, green and lightweight manufacturing composite forming technology of large-scale cover molds for new energy vehicles is also one of the main bottleneck technologies in the development of lightweight forming of parts in the automotive equipment field. Utility Model Content

[0005] In view of the above analysis, the present invention aims to provide an automobile hood and preparation system to solve at least one of the following problems: the poor bonding ability of existing non-polar thermoplastic sheets with paint films, the inability of existing technologies to automate the modification process of non-polar thermoplastic materials used in automobile hood preparation, the open spray modification process that pollutes the environment, the difficulty in accurately controlling the reaction time of the spray co-deposition of non-polar thermoplastic materials, and the poor uniformity of the spray modification of non-polar thermoplastic materials.

[0006] The purpose of this utility model is mainly achieved through the following technical solutions:

[0007] An automobile hood preparation system, comprising a non-polar thermoplastic material modification system, a robot and a molding and paint injection system;

[0008] The non-polar thermoplastic material modification system includes a modification spray cabin, a reagent storage and delivery system, and a drying system;

[0009] The modified spray booth includes a spray booth body, a water collection tank placed inside the spray booth body, a placement table placed in the center of the water collection tank, and a plate fixing device placed on the upper surface of the placement table;

[0010] The spray booth body is a heptahedron formed by a bottom, a top parallel to the bottom, an inclined bulkhead adjacent to the top, a first side bulkhead, a second side bulkhead, a front bulkhead, and a rear bulkhead perpendicular to the bottom.

[0011] The water collection tank is arranged at the center of the cabin bottom, and the water outlet of the water collection tank passes through the first side bulkhead to connect the water collection tank and the outside of the spray cabin body;

[0012] A manipulator passage is provided on the first side bulkhead and is separated from the outside of the cabin by a rubber curtain; and a ventilation hole is provided on the front bulkhead.

[0013] Furthermore, the placement table is provided with a placement table movable plate; the plate fixing device includes a fixing body, a limiting groove provided on the fixing body, and two drainage grooves provided on two parallel edges of the limiting groove.

[0014] Furthermore, the reagent storage and delivery system includes a modified spray agent storage and delivery system, an oxidant storage and delivery system, and a flushing water storage and delivery system;

[0015] The modified spray agent storage and delivery system includes a modified spray agent storage tank, a modified spray agent delivery pump, a spray agent delivery main pipe, a modified spray main pipe, a modified spray branch pipe, and a modified spray nozzle connected in sequence through pipelines; the oxidant storage and delivery system includes an oxidant storage tank, an oxidant delivery pump, the oxidant delivery pump suction port is connected to the oxidant storage tank through a pipeline, and the oxidant delivery pump outlet is connected to the modified spray main pipe through the oxidant delivery main pipe; the flushing water storage and delivery system includes a flushing water tank, a flushing water pump, a flushing pipeline, and a flushing nozzle connected in sequence through pipelines.

[0016] Specifically, the portion of the modified spray main pipe extending into the interior of the modified spray cabin body is a horizontal pipe; the modified spray branch pipes are 1 to 4 horizontal pipes, which are consistent in height with the horizontal portion of the modified spray main pipe. The total length of the portion of the modified spray main pipe extending into the interior of the modified spray cabin body and the modified spray branch pipes exceeds the center of the placement table and does not exceed the outer edge of the placement table.

[0017] Preferably, the spray agent delivery main pipe is provided with a modified spray agent delivery valve, and the oxidant delivery main pipe is provided with an oxidant delivery valve.

[0018] Furthermore, the drying system includes a fan, a bellows, an air duct and an air nozzle connected in sequence, one end of the air outlet of the fan is connected to the bellows, the fan and the bellows are installed on the outside of the inclined bulkhead of the modified spray cabin body, and one end of the air duct is connected to the bellows and then passes through the inclined bulkhead to connect to the air nozzle.

[0019] Furthermore, the molded paint injection system includes a molded paint injection integrated mold and a mold base, and the molded paint injection integrated mold includes an upper mold, a lower mold, an ejector rod assembly, an upper mold moving rod assembly, and a vacuum paint injection system;

[0020] The upper mold is provided with a core, the lower mold is provided with a cavity, and one side of the core of the upper mold cooperates with one side of the cavity of the lower mold to form a mold cavity for molding and / or painting;

[0021] The vacuum paint injection system includes a vacuum channel and a valve assembly, a sealing assembly and a paint injection channel, wherein the vacuum channel is connected to an external vacuum pumping device, the sealing assembly includes an annular sealing plate, and the annular sealing plate extends to the outside of the lower mold, and the paint injection channel is located on the annular sealing plate and connected to the external paint injection device;

[0022] The ejector push rod assembly includes an ejector rod and an ejector rod fixing plate. The ejector rod is arranged inside the lower mold at a position corresponding to the mold cavity, and one end thereof passes through the core and the punch. The ejector rod fixing plate is arranged on the lower side of the lower mold and connected to the other end of the ejector rod. The ejector rod fixing plate is connected to the external ejector oil cylinder.

[0023] The upper mold moving rod assembly includes an upper mold moving rod and an upper mold moving rod fixing plate. The upper mold moving rod is arranged inside the lower mold and one end is connected to the upper mold; the upper mold moving rod fixing plate is arranged on the lower side of the lower mold and is connected to the other end of the upper mold moving rod. The upper mold moving rod fixing plate is connected to the external moving rod cylinder.

[0024] It should be noted that the angle between the plane where the side bulkhead is located and the plane of the cabin top is 138° to 143°.

[0025] Furthermore, the modified spray nozzle is a fan-shaped nozzle, the vertical distance from the tip of the modified spray nozzle to the plate fixing device is 1.5 to 1.8 m, the spray angle is 50° to 85°, the nozzle spray angle at the center position is 65° to 85°, the outermost nozzle spray angle is 50° to 60°, and the nozzle pressure is 0.05 MPa to 0.1 MPa.

[0026] Preferably, the height of the modified spray nozzle does not exceed the height of the highest air nozzle.

[0027] The invention relates to an automobile engine cover, comprising a non-polar thermoplastic plate with a polar coating on the surface and a polyurethane resin paint film with a thickness of 0.5mm to 2mm covering one side of the polar coating.

[0028] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0029] 1. The automobile hood preparation system provided by the utility model realizes the integrated and automated completion of the spraying codeposition reaction, rinsing, and drying of non-polar thermoplastic sheets by providing a modified spray chamber. The codeposition reaction time is also precisely controlled, ensuring that the particle size of the polar microparticle coating attached to the surface of the non-polar thermoplastic sheet is 0.1-3μm, thereby ensuring that the bonding strength of the paint film obtained after paint injection on the surface of the coating-modified non-polar thermoplastic sheet meets the requirements.

[0030] 2. The spraying co-deposition reaction and flushing of the non-polar thermoplastic sheet of the utility model are carried out in a closed modified spraying cabin, and a collection pool is set up to collect the spraying liquid and flushing water for centralized treatment, thereby avoiding environmental pollution and protecting the health of operators.

[0031] 3. The utility model adjusts the position relationship of the spray nozzle, flushing nozzle and air nozzle, including height and angle, so that the spraying, flushing and drying devices do not interfere with each other, and the plate to be processed is placed on a movable placement table to achieve real-time adjustment of the position of the plate and the spray nozzle, flushing nozzle and air nozzle, ensuring that there are no dead angles in spraying, flushing and drying.

[0032] 4. The utility model ensures that the plate to be processed is sprayed evenly without dead angles by rationally arranging the positions of the spraying branch pipes and the nozzles on the spraying branch pipes.

[0033] 5. The utility model designs a limiting groove for the plate fixing device in the modified spraying system and reasonably designs the proportional relationship between the plate size and the limiting groove size, so that the plate to be processed will not produce a large displacement during the spraying, rinsing and drying process, and it is convenient for the robot to pick up the plate; a water outlet ditch is set at the edge of the limiting groove to ensure that excess spray liquid can smoothly enter the water collection pool.

[0034] 6. The utility model completes the work of covering the product surface with a paint film in the mold, realizing the integration of mold pressing and painting, greening, and no exhaust gas discharge; and the one-step molding saves time and cost.

[0035] 7. The automobile engine hood of the utility model comprises a non-polar thermoplastic sheet with a polar coating on the surface and a polyurethane resin paint film with a thickness of 0.5 mm to 2 mm covering one side of the polar coating, and the paint film has strong adhesion.

[0036] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of the present invention will be described in the following content, and some advantages will become apparent from the description or be understood through practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the text and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference symbols denote the same components.

[0038] Figure 1 This is a diagram of the non-polar thermoplastic material modification system of the utility model;

[0039] Figure 2 This is a diagram of the molded paint injection system of the utility model;

[0040] Figure 3 Prepare a system diagram for the automobile hood of this utility model;

[0041] Figure 4 This is a schematic diagram of the external structure of the modified spray booth of the utility model;

[0042] Figure 5 This is a diagram of the modified spraying pipeline for non-polar thermoplastic materials of the utility model;

[0043] Figure 6 This is a top view of the non-polar thermoplastic material modification and fixing device of the utility model.

[0044] Reference numerals:

[0045] 1- Modified spraying cabin; 101- Cabin top; 102- Slanted bulkhead; 103- Bilge bottom; 104- First side bulkhead; 105- Second side bulkhead; 106- Rear bulkhead; 107- Front bulkhead; 2- Modified spraying agent storage tank; 3- Modified spraying agent delivery pump; 4- Modified spraying main pipe; 5- Modified spraying branch pipe; 6- Modified spraying nozzle; 7- Bellows; 8- Fan; 9- Air duct; 10- Nozzle; 11- Manipulator channel; 12- Ventilation port; 13- Water collection tank; 14- Water collection tank outlet; 15- Placement platform; 151- Placement platform movable plate; 16- Plate fixing device; 17- Outlet ditch; 18- Limiting groove Slot; 19- movable manipulator; 20- molded and paint-injected integrated mold; 201- mold base; 202- ejector rod; 203- ejector rod fixing plate; 204- upper mold moving rod fixing plate; 205- vacuum channel and valve assembly; 206- mold cavity; 207- sealing assembly; 208- paint injection channel; 209- upper mold moving rod; 21- flushing water tank; 22- flushing water pump; 23- flushing pipeline; 24- flushing nozzle; 25- oxidant storage tank; 26- oxidant delivery pump; 27- oxidant delivery valve; 28- modified spray agent delivery valve; 29- modified spray agent delivery main pipe; 30- oxidant delivery main pipe. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0047] A specific embodiment of the utility model discloses a car hood preparation system, including a non-polar thermoplastic material modification system, a manipulator and a mold injection paint system;

[0048] The non-polar thermoplastic material modification system includes a modification spray cabin, a reagent storage and delivery system, and a drying system;

[0049] The modified spray booth includes a spray booth body, a water collection tank placed inside the spray booth body, a placement table placed in the center of the water collection tank, and a plate fixing device placed on the upper surface of the placement table;

[0050] The spray booth body is a heptahedron formed by a bottom, a top parallel to the bottom, an inclined bulkhead adjacent to the top, a first side bulkhead, a second side bulkhead, a front bulkhead, and a rear bulkhead perpendicular to the bottom.

[0051] The water collection tank is arranged at the center of the cabin bottom, and the water outlet of the water collection tank passes through the first side bulkhead to connect the water collection tank and the outside of the spray cabin body;

[0052] A manipulator passage is provided on the first side bulkhead and is separated from the outside of the cabin by a rubber curtain; and a ventilation hole is provided on the front bulkhead.

[0053] Furthermore, the placement table is provided with a placement table movable plate; the plate fixing device includes a fixing body, a limiting groove provided on the fixing body, and two drainage grooves provided on two parallel edges of the limiting groove.

[0054] The length of the limiting groove is 1.05 to 1.1 times the length of the plate to be processed, and the width of the limiting groove is 1.05 to 1.1 times the width of the plate to be processed; the width of the outlet ditch is ≤ 20 mm;

[0055] The plate fixing device is designed with a limiting groove, and the proportional relationship between the plate size and the limiting groove size is reasonably designed, so that the plate to be processed will not produce large displacement during the spraying, rinsing and drying process, and it is convenient for the robot to pick up the plate; a water outlet ditch is set at the edge of the limiting groove to ensure that excess spray liquid can smoothly enter the water collection tank.

[0056] Specifically, the reagent storage and delivery system includes a modified spray agent storage and delivery system, an oxidant storage and delivery system, and a flushing water storage and delivery system;

[0057] The modified spray agent storage and delivery system includes a modified spray agent storage tank, a modified spray agent delivery pump, a spray agent delivery main pipe, a modified spray main pipe, a modified spray branch pipe, and a modified spray nozzle connected in sequence through pipelines; the oxidant storage and delivery system includes an oxidant storage tank, an oxidant delivery pump, the oxidant delivery pump suction port is connected to the oxidant storage tank through a pipeline, and the oxidant delivery pump outlet is connected to the modified spray main pipe through the oxidant delivery main pipe; the flushing water storage and delivery system includes a flushing water tank, a flushing water pump, a flushing pipeline, and a flushing nozzle connected in sequence through pipelines;

[0058] The spray agent delivery main pipe is provided with a modified spray agent delivery valve, and the oxidant delivery main pipe is provided with an oxidant delivery valve.

[0059] The modified spraying agent reacts with the oxidant to form a particle coating on the surface of the non-polar thermoplastic material substrate to be processed. The spraying pressure, co-deposition reaction time, and drying time all need to be strictly controlled. This is difficult to achieve with a non-automated and integrated modification system.

[0060] The modified spraying agent includes a mixed solution of phenol and amine, and the oxidant includes one of NaIO4, KMnO4, (NH4)2S2O8, and H2CrO4, all of which are commonly used agents for preparing polar particle coatings in the prior art;

[0061] The modified spray agent storage and delivery system, the oxidant storage and delivery system, and the flushing system are controlled separately to deliver the modified spray agent and oxidant into the modified spraying cabin according to procedures and reaction requirements for spraying and flushing the non-polar thermoplastic sheet placed in the sheet fixing device, thereby realizing the integrated and automated completion of spraying codeposition reaction, flushing, and drying. The codeposition reaction time is precisely controlled to ensure that the particle size of the polar microparticle coating attached to the surface of the non-polar thermoplastic sheet is 0.1-3μm, thereby ensuring that the bonding strength of the paint film obtained after paint injection on the surface of the coating-modified non-polar thermoplastic sheet meets the requirements. The modification time is shortened, the work efficiency is improved, and it is conducive to the industrial production of modified non-polar thermoplastic sheets.

[0062] Furthermore, the portion of the modified spray main pipe extending into the interior of the modified spray cabin body is a horizontal pipe; the modified spray branch pipes are 1 to 4 horizontal pipes, which are consistent in height with the horizontal portion of the modified spray main pipe. The total length of the portion of the modified spray main pipe extending into the interior of the modified spray cabin body and the modified spray branch pipes exceeds the center of the placement table and does not exceed the outer edge of the placement table.

[0063] Furthermore, the drying system includes a fan, a bellows, an air duct and an air nozzle connected in sequence, one end of the air outlet of the fan is connected to the bellows, the fan and the bellows are installed on the outside of the inclined bulkhead of the modified spray cabin body, and one end of the air duct is connected to the bellows and then passes through the inclined bulkhead to connect to the air nozzle.

[0064] It should be noted that the angle between the plane of the side bulkhead and the plane of the cabin roof is 138° to 143°; the vertical distance from the cabin roof to the plate fixing device is 2 to 2.3 meters, and the vertical distance between the wind nozzle and the side bulkhead is 0.5 to 0.8 meters;

[0065] The plate fixing device is installed on the placing table moving plate, and the placing table moving plate can move along the straight direction of the modified spray branch pipe, and its movement limit does not exceed the edge of the water collection pool below;

[0066] The plate fixing device is transported to the corresponding position according to the plate processing process by placing the movable plate on the table. In the drying process, the plate fixing device is moved to the extreme position toward the air nozzle by placing the movable plate on the table. Combined with the angle and distance of the air nozzle, there is no dead angle in the drying process.

[0067] Preferably, the number of the modified spray branch pipes and the modified spray nozzles is determined according to the area of ​​the plate to be processed, the modified spray nozzle is a fan-shaped nozzle, the vertical distance from the tip of the modified spray nozzle to the plate fixing device is 1.5 to 1.8 m, the spray angle is 50° to 85°, the nozzle angle at the center is 65° to 85°, the outermost nozzle angle is 50° to 60°, and the nozzle pressure is 0.05 MPa to 0.1 MPa;

[0068] The reasonable layout of the positions of the spraying branch pipes and the nozzles on the spraying branch pipes ensures that the plate to be processed is sprayed without dead angles and evenly, and the spray coverage area will not overflow the water collection tank.

[0069] In one possible design, the size of the non-polar thermoplastic material plate to be processed is 1368.8mm*698.7mm; the size of the plate fixture is 1800mm*1000mm, the size of the limiting groove is 1468.8mm*798.7mm, and the size of the outlet ditch is 798.7mm*20mm; the number of modified spray branches is 1, the terminal end of the branch passes through the center of the plate fixture and is aligned in the height direction with the edge of the plate fixture groove perpendicular to the branch direction; the modified spray nozzle is a fan-shaped nozzle, the number is 3, the spacing between the nozzles is 740.7mm, one nozzle is located at the end of the branch, and the remaining two nozzles are arranged in sequence according to the spacing; the vertical distance from the tip of the modified spray nozzle to the plate fixture is 1.5m, the nozzle spray angle at the center position is 65°, and the spray angle of the two outer nozzles is 50°.

[0070] The height of the modified spray nozzle does not exceed the height of the highest air nozzle; the height of the modified spray nozzle is higher than the flushing nozzle; the angle between the nozzle center line of the flushing nozzle and the horizontal direction is 25° to 35°.

[0071] By adjusting the position relationship of the spray nozzle, flushing nozzle and air nozzle, including height and angle, the spraying, flushing and drying devices can be prevented from interfering with each other. The plate to be processed is placed on a movable placement table to achieve real-time adjustment of the position of the plate and the spray nozzle, flushing nozzle and air nozzle, ensuring that there are no dead angles in spraying, flushing and drying.

[0072] The area of ​​the water collection pool is 2 to 2.5 times the area of ​​the plate fixing device, ensuring that no solution is scattered outside during the spraying and flushing process.

[0073] The molded paint injection system includes a molded paint injection integrated mold and a mold base, and the molded paint injection integrated mold includes an upper mold, a lower mold, an ejector rod assembly, an upper mold moving rod assembly, and a vacuum paint injection system;

[0074] The upper mold is provided with a core, and the lower mold is provided with a cavity. One side of the core of the upper mold cooperates with one side of the cavity of the lower mold to form a mold cavity for molding and / or painting.

[0075] The vacuum paint injection system includes a vacuum channel and a valve assembly, a sealing assembly and a paint injection channel, wherein the vacuum channel is connected to an external vacuum pumping device, the sealing assembly includes an annular sealing plate, and the annular sealing plate extends to the outside of the lower mold, and the paint injection channel is located on the annular sealing plate and connected to the external paint injection device;

[0076] The ejector push rod assembly includes an ejector rod and an ejector rod fixing plate. The ejector rod is arranged inside the lower mold at a position corresponding to the mold cavity, and one end thereof passes through the core and the punch. The ejector rod fixing plate is arranged on the lower side of the lower mold and connected to the other end of the ejector rod. The ejector rod fixing plate is connected to the external ejector oil cylinder.

[0077] The upper mold moving rod assembly includes an upper mold moving rod and an upper mold moving rod fixing plate. The upper mold moving rod is arranged inside the lower mold and one end is connected to the upper mold; the upper mold moving rod fixing plate is arranged on the lower side of the lower mold and is connected to the other end of the upper mold moving rod. The upper mold moving rod fixing plate is connected to the external moving rod cylinder.

[0078] The product surface is covered with paint film in the integrated mold for compression and painting, achieving integrated compression painting and green process without exhaust gas emission; and the molding is done in one step, saving time and cost.

[0079] The invention relates to an automobile engine cover, comprising a non-polar thermoplastic plate with a polar coating on the surface and a polyurethane resin paint film with a thickness of 0.5mm to 2mm covering one side of the polar coating, wherein the paint film has strong adhesion.

[0080] The operating process of the automobile hood preparation system is as follows:

[0081] The non-polar thermoplastic material sheet to be processed has a size of 1368.8mm*698.7mm and a thickness of 5mm. The sheet fixture has a size of 1800mm*1000mm, a size of the limiting groove of 1468.8mm*798.7mm, and a size of the outlet ditch of 798.7mm*20mm. There is one modified spray branch pipe, the terminal of which passes over the center of the sheet fixture and is aligned in height with the edge of the sheet fixture groove perpendicular to the branch pipe direction. The modified spray nozzles are fan-shaped nozzles, and there are three of them. The spacing between the nozzles is 740.7mm, with one nozzle located at the end of the branch pipe and the remaining two nozzles arranged in sequence according to the spacing. The vertical distance from the tip of the modified spray nozzle to the sheet fixture is 1.5m. The nozzle spray angle at the center is 65°, and the spray angle of the two outer nozzles is 50°. The nozzle pressure is 0.05MPa.

[0082] The movable manipulator is placed in the limiting groove of the plate fixing device through the manipulator channel on the first side wall of the modified spraying cabin. After opening the modified spraying agent delivery valve, the modified spraying agent delivery pump is started. After spraying a certain amount of modified spraying agent on the plate, the modified spraying agent delivery pump and the modified spraying agent delivery valve are closed in sequence. The oxidant delivery valve and the oxidant delivery pump are opened in sequence. After spraying a certain amount of oxidant on the plate, the oxidant delivery valve and the oxidant delivery pump are immediately closed in sequence. After the co-deposition reaction lasts for 5 minutes, the flushing water pump is turned on to flush the surface coating of the co-deposited substrate for 5 minutes, and then the flushing water pump is turned off. The plate fixing device is immediately moved toward the air nozzle through the placing table movable plate. After moving to the displacement limit, the fan is turned on to blow dry the plate, and the fan is turned off after blowing for 10 minutes.

[0083] Open the upper mold of the mold pressing and painting integrated mold through the upper mold moving rod assembly;

[0084] The movable manipulator takes the modified plate out of the modified spray cabin through the manipulator channel on the first side wall of the modified spray cabin, places it in the mold cavity of the mold-pressing and paint-injection integrated mold, and closes the mold for molding through the upper mold moving rod assembly; after molding, the upper mold is slightly opened by 0.5 mm through the upper mold moving rod assembly, and polyurethane resin is injected to maintain a paint film thickness of 0.5 mm; curing and molding are carried out, the curing and molding temperature is 90°C, and the curing time is less than 10 minutes; after the paint film is cured and formed, the upper mold is opened, and the finished product is ejected by the ejector rod assembly to obtain the automobile hood product.

[0085] In one possible design, the certain amount of modified spray agent can be 10 mL of a mixed solution of phenol and amine in Tris-HCl-anhydrous ethanol, and the certain amount of oxidant can be 5 mL of a Tris-HCl-anhydrous ethanol solution containing 2 mg / mL KMnO4. Both are agents and ratios commonly used in the prior art to prepare polar particulate coatings on non-polar thermoplastic material plates.

[0086] In summary, the automobile hood preparation system provided by the present invention realizes the integrated and automated spraying and co-deposition reaction, rinsing, and drying of non-polar thermoplastic sheets by providing a modified spraying cabin; and the co-deposition reaction time is precisely controlled, ensuring that the particle size of the polar microparticle coating attached to the surface of the non-polar thermoplastic sheet is 0.1-3 μm, thereby ensuring that the bonding strength of the paint film obtained after paint injection on the surface of the coating-modified non-polar thermoplastic sheet meets the requirements; the spraying and co-deposition reaction and rinsing are both carried out in a closed modified spraying cabin, and a water collection tank is provided to collect the spraying liquid and rinsing water for centralized treatment, thereby avoiding environmental pollution and protecting the health of operators.

[0087] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A car hood preparation system, characterized in that: Including non-polar thermoplastic material modification system, robot and injection molding system; The non-polar thermoplastic material modification system includes a modification spray cabin, a reagent storage and delivery system, and a drying system; The modified spray booth includes a spray booth body, a water collection tank placed inside the spray booth body, a placement table placed in the center of the water collection tank, and a plate fixing device placed on the upper surface of the placement table; The spray booth body is a heptahedron formed by a bottom, a top parallel to the bottom, an inclined bulkhead adjacent to the top, a first side bulkhead, a second side bulkhead, a front bulkhead, and a rear bulkhead perpendicular to the bottom. The water collection tank is arranged at the center of the bilge, and the water outlet of the water collection tank passes through the first side bulkhead to connect the water collection tank and the outside of the spray cabin body; A manipulator passage is provided on the first side bulkhead and is separated from the outside of the cabin by a rubber curtain; and a ventilation hole is provided on the front bulkhead.

2. The preparation system according to claim 1, characterized in that: The placement table is provided with a placement table moving plate; The plate fixing device comprises a fixing body, a limiting groove arranged on the fixing body, and two water outlet grooves arranged on two parallel edges of the limiting groove.

3. The preparation system according to claim 1, characterized in that: The reagent storage and delivery system includes a modified spray agent storage and delivery system, an oxidant storage and delivery system, and a flushing water storage and delivery system; The modified spray agent storage and delivery system includes a modified spray agent storage tank, a modified spray agent delivery pump, a spray agent delivery main pipe, a modified spray main pipe, a modified spray branch pipe, and a modified spray nozzle connected in sequence through pipelines; the oxidant storage and delivery system includes an oxidant storage tank, an oxidant delivery pump, the oxidant delivery pump suction port is connected to the oxidant storage tank through a pipeline, and the oxidant delivery pump outlet is connected to the modified spray main pipe through the oxidant delivery main pipe; the flushing water storage and delivery system includes a flushing water tank, a flushing water pump, a flushing pipeline, and a flushing nozzle connected in sequence through pipelines.

4. The preparation system according to claim 3, characterized in that: The portion of the modified spray main pipe extending into the interior of the modified spray cabin body is a horizontal pipe; the modified spray branch pipes are 1 to 4 horizontal pipes, which are consistent in height with the horizontal portion of the modified spray main pipe. The total length of the portion of the modified spray main pipe extending into the interior of the modified spray cabin body and the modified spray branch pipes exceeds the center of the placement table and does not exceed the outer edge of the placement table.

5. The preparation system according to claim 3, characterized in that: The spray agent delivery main pipe is provided with a modified spray agent delivery valve, and the oxidant delivery main pipe is provided with an oxidant delivery valve.

6. The preparation system according to claim 1, characterized in that: The drying system includes a fan, a bellows, an air duct and an air nozzle connected in sequence. One end of the air outlet of the fan is connected to the bellows. The fan and the bellows are installed on the outside of the inclined bulkhead of the modified spray cabin body. One end of the air duct is connected to the bellows and then passes through the inclined bulkhead to connect to the air nozzle.

7. The preparation system according to claim 1, characterized in that: The molded paint injection system includes a molded paint injection integrated mold and a mold base, and the molded paint injection integrated mold includes an upper mold, a lower mold, an ejector rod assembly, an upper mold moving rod assembly, and a vacuum paint injection system; The upper mold is provided with a core, the lower mold is provided with a cavity, and one side of the core of the upper mold cooperates with one side of the cavity of the lower mold to form a mold cavity for molding and / or painting; The vacuum paint injection system includes a vacuum channel and a valve assembly, a sealing assembly and a paint injection channel, wherein the vacuum channel is connected to an external vacuum pumping device, the sealing assembly includes an annular sealing plate, and the annular sealing plate extends to the outside of the lower mold, and the paint injection channel is located on the annular sealing plate and connected to the external paint injection device; The ejector push rod assembly includes an ejector rod and an ejector rod fixing plate. The ejector rod is arranged inside the lower mold at a position corresponding to the mold cavity, and one end thereof passes through the core and the punch. The ejector rod fixing plate is arranged on the lower side of the lower mold and connected to the other end of the ejector rod. The ejector rod fixing plate is connected to the external ejector oil cylinder. The upper mold moving rod assembly includes an upper mold moving rod and an upper mold moving rod fixing plate. The upper mold moving rod is arranged inside the lower mold and one end is connected to the upper mold; the upper mold moving rod fixing plate is arranged on the lower side of the lower mold and is connected to the other end of the upper mold moving rod. The upper mold moving rod fixing plate is connected to the external moving rod cylinder.

8. The preparation system according to claim 1, characterized in that: The angle between the plane where the side bulkhead is located and the plane of the cabin top is 138° to 143°.

9. The preparation system according to claim 3, characterized in that: The modified spray nozzle is a fan-shaped nozzle, the vertical distance from the tip of the modified spray nozzle to the plate fixing device is 1.5 to 1.8 m, the spray angle is 50° to 85°, the nozzle spray angle at the center position is 65° to 85°, the outer nozzle spray angle is 50° to 60°, and the nozzle pressure is 0.05 MPa to 0.1 MPa; the height of the modified spray nozzle does not exceed the height of the highest air nozzle.

10. A car hood, characterized in that: The product is prepared using the preparation system according to any one of claims 1 to 9, comprising a non-polar thermoplastic sheet with a polar coating on the surface and a polyurethane resin paint film with a thickness of 0.5 mm to 2 mm covering one side of the polar coating.

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