Spray-free body panel and method and apparatus for manufacturing same

Abstract

The application discloses a spray-free body panel and a manufacturing method and device thereof, which comprises a substrate made of injection-molded thermoplastic polymer, used for providing structural strength and rigidity; an intermediate structure arranged on the substrate, made of reactive resin by reactive injection molding and containing coloring materials, used for providing color effects; and an outer layer structure arranged on the outside of the intermediate structure, formed by heating and vacuum adsorption of a prefabricated sheet material. The application adopts a two-step process of double-station parallel pretreatment and one-time mold closing, and has simple procedures, short production cycle and high qualified rate.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing technology, and in particular to paint-free body panels and their manufacturing methods and apparatus. Background Technology

[0002] Traditional automotive body panels are typically manufactured using sheet metal, injection molding, or compression molding polymers. After manufacturing, they generally require painting to achieve both decorative appeal and durability. The painting process typically involves at least several steps, including applying color paint, applying clear coat, and baking / curing. The color paint layer provides the color effect, while the clear coat layer provides gloss and scratch resistance. Composite coatings of color paint and clear coat can further enhance color saturation and provide additional multi-layered effects.

[0003] However, current spray painting processes are complex, have long production cycles, and low pass rates. Furthermore, the air conditioning used to maintain the temperature and humidity of the spray painting room and the ovens used to cure the coating require large amounts of electricity and natural gas, resulting in high energy consumption. The VOCs emitted from the paint require additional waste gas treatment equipment. Spray painting also generates at least 30% overspray mist, resulting in low material utilization and the generation of hazardous waste. Summary of the Invention

[0004] To address the aforementioned problems, the present invention provides a paint-free vehicle body panel and its manufacturing method and apparatus.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] Paint-free body panels, including:

[0007] The substrate, made of injection-molded thermoplastic polymer, is used to provide structural strength and stiffness;

[0008] The intermediate structure, disposed on the substrate, is composed of reactive resin formed by reaction injection molding and contains coloring material for providing color effects;

[0009] The outer layer structure, located outside the middle structure, is formed by heating and vacuum adsorption of prefabricated sheet material.

[0010] The intermediate structure is further configured such that it is bonded to the substrate and the outer layer structure during molding through molecular diffusion, chemical bonding and mechanical anchoring.

[0011] The substrate is further configured such that the material is selected from one or more of polypropylene, polyethylene, acrylonitrile-butadiene-styrene terpolymer, nylon, and thermoplastic polyolefin, and talc, glass fiber, or carbon fiber may be added as filler materials.

[0012] The intermediate structure is further configured such that the reactive resin is selected from one or more of polyurethane, polyurea, epoxy resin, or acrylic resin.

[0013] The outer layer is further configured such that the sheet material is selected from one or more of thermoplastic polyurethane elastomer, polyethylene terephthalate, polycarbonate or polyolefin elastomer, or is a multilayer composite sheet with the above materials as the matrix.

[0014] A method for manufacturing a paint-free vehicle body panel includes the following steps:

[0015] Step 201: Inject the thermoplastic polymer into the cavity of the injection mold, which is formed by the upper and lower injection molds of the moving mold and the fixed mold, to form a substrate.

[0016] Step 202: Place the pre-made sheet material on the vacuum adsorption moving mold, and heat the sheet material to a temperature above the softening temperature and below the melting temperature.

[0017] Step 203: Using vacuum negative pressure, the softened sheet material is adsorbed onto the inner surface of the vacuum adsorption moving mold, so that it completely fits the cavity of the vacuum adsorption moving mold, and the shape details of the mold are replicated to form the outer layer structure of the body panel body.

[0018] Step 204: The injection mold with substrate and the vacuum adsorption moving mold with outer layer structure are combined to inject reactive resin into the cavity between the substrate and the outer layer structure to form the intermediate structure of the body panel body, which is then combined with the outer layer structure and the substrate to form the panel body.

[0019] A painting-free vehicle body panel manufacturing apparatus is used to manufacture a panel body (100) and a substrate, intermediate structure, and outer layer structure that make up the panel body. The apparatus includes a first station, a second station, and a third station, all linearly and horizontally arranged in sequence. Vertically arranged guide rods are installed on each of the first, second, and third stations. Heating devices and injection molding machines are installed on the first and third stations. Vacuum adsorption moving molds are slidably mounted on the guide rods of the first and third stations, moving along the direction of the guide rods. A pressing device and a vacuum device are installed on the vacuum adsorption moving molds. An injection molding moving mold and an injection molding machine are installed on the second station. A movable switching plate is provided between the first, second, and third stations, and the running direction of the switching plate is consistent with the distribution direction of the first, second, and third stations. Two injection molding fixed molds are provided on the switching plate, and the distance between the two injection molding fixed molds is consistent with the distance between any two adjacent stations among the three stations.

[0020] The clamping device is further configured as follows: the clamping device consists of an annular frame larger than the size of the panel body and a driving mechanism. A sealing gasket is provided on the inner periphery of the annular frame. The annular frame can move and completely fit the vacuum adsorption moving mold, thereby tightly clamping and sealing the four edges of the sheet material.

[0021] The heating device is further configured such that: the heating device consists of a heating plate and a moving mechanism; the size of the heating plate is the same as or larger than the size of the panel body; an infrared heater is arranged on the heating plate; and the moving mechanism can move the heating plate to the outside of the sheet material at a certain distance.

[0022] The vacuum device is further configured as follows: the vacuum device includes an air hole, a vacuum pipeline and a vacuum air source. The air hole is located on the surface of the vacuum adsorption moving mold, corresponding to the annular frame of the pressing device, and is located inside the annular area of ​​the annular frame. The vacuum pipeline is located inside the vacuum adsorption moving mold, with one end connected to the air hole and the other end connected to the vacuum air source outside the vacuum adsorption moving mold. The vacuum air source can provide vacuum negative pressure to the vacuum pipeline through control.

[0023] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0024] 1. The process adopts a two-step method of parallel pre-processing at two stations and single mold closing, which is simple, has a short production cycle, and a high pass rate;

[0025] 2. The production process does not require drying or air conditioning equipment to maintain temperature and humidity, resulting in low energy consumption;

[0026] 3. Vacuum coating, injection molding, and reaction injection have high material utilization rates;

[0027] 4. It does not generate hazardous waste or large amounts of VOCs, and does not require corresponding treatment equipment;

[0028] 5. High pass rate, low energy consumption, high material utilization rate and no environmental protection-related operating costs result in a significant reduction in the overall production cost of a single product.

[0029] 6. By changing the sheet material and switching the reaction injection material, different colors, surface textures (high gloss, matte), and functions (self-healing, self-cleaning) of car body panels can be quickly produced on a single production line, perfectly adapting to the modern automotive trend of customization and small-batch production, greatly improving design freedom and reducing mold investment costs. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a structural diagram of the paint-free vehicle body panel in this invention;

[0032] Figure 2 This is a schematic diagram of the paint-free vehicle body panel manufacturing method of the present invention;

[0033] Figure 3 This is a flowchart of the paint-free vehicle body panel manufacturing method of the present invention;

[0034] Figure 4 This is a schematic diagram of the paint-free vehicle body panel manufacturing apparatus of the present invention. Figure 1 ;

[0035] Figure 5 This is a schematic diagram of the paint-free vehicle body panel manufacturing apparatus of the present invention. Figure 2 ;

[0036] Figure 6 This is a schematic diagram of the paint-free vehicle body panel manufacturing apparatus of the present invention. Figure 3 ;

[0037] Figure 7 This is a schematic diagram of the paint-free vehicle body panel manufacturing apparatus of the present invention. Figure 4 ;

[0038] Figure 8 This is a schematic diagram of the paint-free vehicle body panel manufacturing apparatus of the present invention. Figure 5 ;

[0039] Figure 9 This is a schematic diagram of the paint-free body panel manufacturing apparatus of the present invention. Figure 6 ;

[0040] Figure 10 This is a schematic diagram of the paint-free body panel manufacturing apparatus of the present invention. Figure 7 ;

[0041] Figure 11 This is a schematic diagram of the paint-free vehicle body panel manufacturing apparatus of the present invention. Figure 8 ;

[0042] Reference numerals: 100, panel body; 110, substrate; 120, intermediate structure; 130, outer layer structure; 131, sheet material; 301, first station; 302, second station; 303, third station; 310, vacuum adsorption moving mold; 320, pressing device; 330, injection moving mold; 340, injection fixed mold; 350, heating device; 360, guide rod; 370, vacuum device; 380, injection machine; 390, injection molding machine; 400, switching plate. Detailed Implementation

[0043] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] Example 1:

[0047] Reference Figure 1 The paint-free vehicle body panel disclosed in this invention consists of a three-layer structure: a substrate 110, an intermediate structure 120, and an outer structure 130, wherein:

[0048] The substrate 110 is made of injection-molded thermoplastic polymer to provide structural strength and rigidity for the panel. The material is selected from one or more of the following: polypropylene (PP), polyethylene (PE), acrylonitrile-butadiene-styrene terpolymer (ABS), nylon (PA), and thermoplastic polyolefin (TPO).

[0049] Furthermore, 5%-40% of materials such as talc, glass fiber, or carbon fiber can be added to the polymer matrix to optimize cost and performance.

[0050] The intermediate structure 120 is used to provide color effects, and the intermediate structure 120 is formed by reaction injection molding. During molding, the reactive resin of the intermediate structure 120 can undergo molecular diffusion and chemical bonding with the contact surface of the outer layer structure 130 and the substrate 110, and can penetrate into the microscopic surface pores through the reactive resin to form a mechanical anchoring effect, ensuring the interlayer bonding force, and realizing a stable combination of the three-layer structure of substrate 110, intermediate structure 120 and outer layer structure 130, thereby forming the panel body 100.

[0051] In this embodiment, the reactive resin material selected for the reactive injection molding of the intermediate structure 120 is selected from one or more of the following: polyurethane (PU), polyurea, epoxy modified (EP), or acrylic resin.

[0052] Furthermore, the intermediate structure 120 also incorporates coloring materials, which can be pigments, pearlescent powders, or aluminum powders, to achieve the same color effect as spraying.

[0053] The outer layer structure 130 is located on the outermost side and has durability, impact resistance, weather resistance, and scratch resistance. In this embodiment, the color effect of the middle structure 120 can be seen through the outer layer structure 130.

[0054] Furthermore, the outer layer structure 130 is pre-processed into a sheet material 131 of a certain shape or rolled up, and is manufactured by heating and vacuum adsorption processes. The outer layer structure 130 can be made of sheet material 131 composed of thermoplastic polyurethane elastomer (TPU), polyethylene terephthalate (PET / PETG), polycarbonate (PC) or polyolefin elastomer (POE), or it can be made of multilayer composite sheet material 131 based on the above materials.

[0055] For example, a sheet material 131 made by multi-layer co-extrusion of a self-cleaning layer, a thermoplastic polyurethane elastomer layer, and an interlayer bonding reinforcement layer can have more or stronger functions than a single layer material.

[0056] In this embodiment, the self-cleaning functional layer is implemented by adding 5%-15% fluorosilicone modified masterbatch and 2%-10% nano-silica to the thermoplastic resin matrix material. The surface contact angle is 155° and the oil stain rolling angle is 8°, which can achieve the cleaning function through rainwater.

[0057] The sheet material 131 of the outer structure 130 can also be pre-prepared with more functional layers, such as: self-healing coating, antistatic layer, infrared reflective layer (for energy saving), and wave-transparent layer for autonomous driving sensors (such as radar wave, lidar band), etc.

[0058] Specifically, the self-healing coating is achieved by adding 5%-10% of a disulfide bond-containing chain extender to the TPU, which repairs the scratches through the breaking and recombination of sulfur-sulfide bonds (scratch healing rate >90% after heating at 80℃ for 10 minutes). The antistatic layer is achieved by adding 5% of a compound antistatic agent of glyceryl stearate and quaternary ammonium salt to the matrix resin, which stabilizes the surface resistance at [value missing]. Ω. Infrared reflective layer implementation: A layered material made by adding 5% ATO (antimony-doped tin oxide) nanoparticles to the matrix resin, with visible light transmittance >70% and infrared reflectance >60%. Wave-transmitting layer implementation: 0.1%-0.5% UV absorber (such as benzotriazole) added to the matrix resin to avoid yellowing due to long-term light exposure (affecting laser transmission).

[0059] The present invention can also change the appearance of the panel body 100 by altering the appearance of the sheet material 131 used to manufacture the outer layer structure 130, such as by selecting a high-gloss surface or a frosted surface for the sheet material 131. Compared to injection molding or reactive injection onto the mold surface, and compared to relying on the appearance of the mold surface to determine the product's surface appearance, the present invention can reduce the quantity and quality requirements of molds, and the surface of the sheet material 131 is also more convenient for printing patterns, using ordinary wide-format flatbed printing equipment.

[0060] Example 2:

[0061] Reference Figures 2-3 The method for manufacturing a paint-free vehicle body panel according to the present invention includes the following steps:

[0062] Step 201: The thermoplastic polymer is injected into the cavity of the injection mold formed by the upper and lower injection mold 330 and the lower injection mold 340 to form the substrate 110.

[0063] Step 202: Place the pre-made sheet material 131 on the vacuum adsorption moving mold 310, and heat the sheet material 131 to a temperature above the softening temperature and below the melting temperature.

[0064] Step 203: Using vacuum negative pressure, the softened sheet material 131 is adsorbed onto the inner surface of the vacuum adsorption moving mold 310, so that it completely fits the cavity of the vacuum adsorption moving mold 310, and the shape details of the mold are replicated to form the outer layer structure 130 of the body panel body 100.

[0065] In step 204, the injection mold 340 with substrate 110 and the vacuum adsorption moving mold 310 with outer layer structure 130 are combined to inject reactive resin into the cavity between substrate 110 and outer layer structure 130, forming the intermediate structure 120 of the vehicle body panel body 100, which is then combined with the outer layer structure 130 and substrate 110, and the three together constitute the panel body 100.

[0066] Example 3:

[0067] Reference Figures 4-10 The manufacturing equipment for paint-free vehicle body panels of the present invention includes a first station 301, a second station 302, and a third station 303 that are uniformly and linearly distributed and arranged horizontally in sequence.

[0068] Vertically arranged guide rods 360 are installed on the first station 301, the second station 302, and the third station 303. Heating devices 350 and injection molding machines 380 are installed on the first station 301 and the third station 303. Vacuum adsorption moving molds 310 are slidably arranged on the guide rods 360 of the first station 301 and the third station 303. Vacuum adsorption moving molds 310 move along the direction of guide rods 360. Pressing devices 320 and vacuum devices 370 are installed on vacuum adsorption moving molds 310. Injection moving molds 330 and injection molding machines 390 are installed on the second station 302.

[0069] A movable switching plate 400 is provided between the first station 301, the second station 302, and the third station 303, and the running direction of the switching plate 400 is consistent with the distribution direction of the first station 301, the second station 302, and the third station 303. In this embodiment, a driving component, such as a cylinder or a hydraulic cylinder, is provided to drive the switching plate 400 to run; and two injection molds 340 are provided on the switching plate 400, and the distance between the two injection molds 340 is consistent with the distance between any two adjacent stations among the three stations.

[0070] The working principle of the paint-free vehicle body panel manufacturing equipment in this embodiment is as follows:

[0071] Step 301: During operation, the two injection molds 340 on the switching plate 400 are first located directly below the injection moving mold 330 in the second station 302 and the vacuum adsorption moving mold 310 in the third station 303, respectively. The first station 301, the second station 302 and the third station work simultaneously.

[0072] Specifically, at the first station 301: the pressing device 320 on the first station 301 presses the periphery of the pre-made sheet material 131 onto the vacuum adsorption moving mold 310 on the first station 301. The heating device 350 on the first station 301 is activated to heat the sheet material 131 to a softened state. Then, the vacuum device 370 on the first station 301 is activated. The softened sheet material 131 will stretch and deform, then adhere to the pre-made shape inside the vacuum adsorption moving mold 310 and be cooled to obtain the outer structure 130.

[0073] At the second station 302: the moving injection mold 330 moves downward via the guide rod 360. After the moving injection mold 330 moves, it can be combined with the fixed injection mold 340 at the second station 302 to form an injection mold. The injection molding machine 390 can be used to inject polymer into the cavity between the injection molds to form the substrate 110.

[0074] At the third station 303: the pressing device 320 on the third station 303 presses the periphery of the pre-made sheet material 131 onto the vacuum adsorption moving mold 310 on the third station 303. The heating device 350 on the third station 303 is activated to heat the sheet material 131 to a softened state. Then, the vacuum device 370 on the third station 303 is activated. The softened sheet material 131 will stretch and deform and then stick to the pre-made shape inside the vacuum adsorption moving mold 310. After cooling, the outer structure 130 is obtained.

[0075] After the outer layer structure 130 is fabricated, the vacuum adsorption moving mold 310 on the third station 303 can move downwards via the guide rod 360. After the vacuum adsorption moving mold 310 with the outer layer structure 130 moves, it can be combined with the injection molding fixed mold 340 with the substrate 110. A gap is formed between the outer layer structure 130 and the substrate 110. The injection molding machine 380 on the third station 303 can inject and fill the gap along the edge of the gap with sheet material 131 composed of thermoplastic polyurethane elastomer, polyethylene terephthalate, polycarbonate or polyolefin elastomer, or multilayer composite sheet material 131 based on the above materials, to form the intermediate structure 120. The reactive resin is combined with the outer layer structure 130 and the substrate 110, and the three together constitute the panel body 100.

[0076] Step 302: At the second station 302: the moving injection mold 330 disengages from the fixed injection mold 340 at the second station 302, and the substrate 110 remains on the fixed injection mold 340 at the second station 302.

[0077] At the third station 303: the vacuum adsorption moving mold 310 of the third station 303 is detached from the second injection molding fixed mold 340. The body panel body 100 can remain on the vacuum adsorption moving mold 310 or the injection molding fixed mold 340 of the third station 303, and then the body panel body 100 manufactured in step 301 can be taken out.

[0078] Step 303: Drive the switching plate 400 so that the switching plate 400 moves the injection mold 340 with the substrate 110 on the second station 302 to the first station 301, and at the same time moves the injection mold 340 on the third station 303 to the second station 302.

[0079] Step 304, at the first station 301: the vacuum adsorption moving mold 310 with the outer layer structure 130 moves downward along the guide rod 360 and combines with the injection mold 340 with the substrate 110. The intermediate structure 120 is manufactured by reaction injection through the injection machine 380 at the first station 301 and the panel body 100 is formed.

[0080] At the second station 302: the injection moving mold 330 and the injection stationary mold on the second station 302 are combined to form an injection mold, and the substrate 110 is manufactured by injection molding.

[0081] At the third station 303, the sheet material 131 is placed on the vacuum adsorption moving mold 310 at the third station 303. The heating device 350 at the third station 303 is activated to heat the sheet material 131 to a softened state. Then, the vacuum device 370 at the third station 303 is activated. The softened sheet material 131 will stretch and deform and then stick to the pre-made shape inside the vacuum adsorption moving mold 310. After cooling, the sheet material 131 is made into the outer layer structure 130 of the body panel body 100.

[0082] Step 305: At the first station 301: The vacuum adsorption moving mold 310 of the first station 301 detaches from the injection molding fixed mold 340 of the first station 301, and the body panel body 100 remains on the vacuum adsorption moving mold 310.

[0083] At the second station 302: the moving injection mold 330 disengages from the fixed injection mold 340, and the body panel body 100 can remain on the vacuum adsorption moving mold 310 or the fixed injection mold 340.

[0084] Step 306: Remove the body panel manufactured in step 305;

[0085] Step 307: Drive switching board 400 is reset to its initial position;

[0086] Step 308, repeat steps 301-307 in a loop.

[0087] In this embodiment, the clamping device 320 consists of an annular frame larger than the panel body 100 and a driving mechanism. A sealing gasket is provided on the inner periphery of the annular frame. The annular frame is movably mounted on the vacuum adsorption moving mold 310 by the driving mechanism (such as a hydraulic cylinder or a lead screw driven by a servo motor). Driven by the driving mechanism, the annular frame can move and completely fit the vacuum adsorption moving mold 310, thereby tightly clamping and sealing the four edges of the sheet material 131 to form a sealed area and prevent air leakage during vacuuming. Specifically, the clamping device 320 is the clamping device 320 in the TZ-7695 negative pressure thermoforming machine of Dongguan Taizhang Machinery Co., Ltd. Its more detailed mechanical structure will not be described in detail here.

[0088] In this embodiment, the heating device 350 consists of a heating plate and a moving mechanism. The size of the heating plate is basically the same as or larger than the size of the panel body 100. An infrared heater is arranged on the heating plate. The moving mechanism can move the heating plate to the outside of the sheet material 131 at a certain distance and turn on the infrared heater to heat the sheet material 131 to above the softening temperature (e.g., the softening temperature of TPU film is 130°C). The moving mechanism can be a cylinder, electric cylinder, hydraulic cylinder, or a lead screw driven by a servo motor. Specifically, the heating device 350 is the heating device 350 in the TZ-7695 negative pressure thermoforming machine of Dongguan Taizhang Machinery Co., Ltd., and its more detailed mechanical structure will not be described in detail here.

[0089] After the sheet material 131 is pressed onto the vacuum adsorption moving mold 310 by the pressing device 320 and heated to above the softening temperature by the heating device 350, the vacuum source is turned on to remove the air in the sealed cavity between the sheet material 131 and the vacuum adsorption moving mold 310 through the air hole and vacuum pipeline. The softened sheet material 131 deforms and stretches to completely fit the cavity of the vacuum adsorption moving mold 310, replicating the shape details of the vacuum adsorption moving mold 310. Specifically, the vacuum device 370 is the vacuum device 370 in the TZ-7695 negative pressure thermoforming machine of Dongguan Taizhang Machinery Co., Ltd. Its more detailed mechanical structure will not be described in detail here.

[0090] In this embodiment, the model of injection molding machine 380 is HIGHLINEMK2, and the model of injection molding machine 390 is MA5300III / 4500. Their mechanical structure and working principle will not be described in detail here.

[0091] The working principle and beneficial effects of this invention are as follows:

[0092] This invention utilizes a moving injection mold 330 and two moving vacuum adsorption molds 310, in conjunction with two switchable fixed injection molds 340, to perform continuous vacuum adsorption, injection molding, and reaction injection. Each time the moving injection mold 330 and one of the two fixed injection molds 340 are closed, a substrate 110 can be injection molded. Simultaneously, the other fixed injection mold 340 can be closed with one of the moving vacuum adsorption molds 310 to perform reaction injection to manufacture an intermediate structure 120 and form the panel body 100. At the same time, the other moving vacuum adsorption mold 310 can use vacuum adsorption of sheet material 131 to manufacture an outer layer structure 130, thereby achieving continuous production and greatly improving production efficiency.

[0093] In this invention, the injection molding machine 380 can inject materials that produce the same color effect to produce panel bodies 100 with the same color effect, or it can inject two materials with different color effects to produce panel bodies 100 with different color effects at the same time.

[0094] Example 4:

[0095] Reference Figure 11 In another embodiment, the injection molding moving mold 330 and the vacuum adsorption moving molds 310 on both sides share a set of guide rods 360. Compared with the three having independent guide rods 360, the number of moving mold guiding devices is reduced. This design greatly simplifies the mechanical structure, reduces equipment manufacturing costs and maintenance complexity, while ensuring the synchronization and accuracy of the movement of each moving mold. It is a preferred solution that combines high performance and low cost.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A manufacturing apparatus for paint-free vehicle body panels, characterized in that, For manufacturing the panel body (100) and the substrate (110), intermediate structure (120) and outer layer structure (130) constituting the panel body (100), it includes a first station (301), a second station (302), and a third station (303) that are uniformly and linearly distributed and arranged horizontally in sequence; each of the first station (301), the second station (302), and the third station (303) is equipped with a vertically arranged guide rod (360), and the first station (301) is equipped with a guide rod (360) arranged horizontally in sequence. A heating device (350) and an injection molding machine (380) are provided on the third station (303). A vacuum adsorption moving mold (310) is slidably provided on the guide rod (360) of the first station (301) and the third station (303). The vacuum adsorption moving mold (310) moves along the direction of the guide rod (360). A pressing device and a vacuum device are provided on the vacuum adsorption moving mold (310) for manufacturing the outer layer structure (130) through a heating-vacuum adsorption process. A moving injection mold (330) and an injection molding machine (390) are provided on station (302) for manufacturing substrate (110) by injection molding process; a movable switching plate (400) is provided between the first station (301), the second station (302), and the third station (303), and the running direction of the switching plate (400) is consistent with the distribution direction of the first station (301), the second station (302), and the third station (303), and two injection molding machines are provided on the switching plate (400). The fixed mold (340) and the spacing between the two injection fixed molds (340) are consistent with the spacing between any two adjacent stations in the three stations. It is used to carry the substrate (110) and switch between stations. It works in conjunction with the vacuum adsorption moving mold of the first station (301) or the third station (303) to inject reactive resin through the injection machine (380) to manufacture the intermediate structure (120). Finally, the substrate (110), the intermediate structure (120) and the outer layer structure (130) are combined to form the panel body (100).

2. The manufacturing apparatus for paint-free vehicle body panels according to claim 1, characterized in that, The clamping device (320) consists of an annular frame larger than the panel body (100) and a driving mechanism. The inner periphery of the annular frame is provided with a sealing gasket. The annular frame can move and completely fit the vacuum adsorption moving mold (310), thereby tightly clamping and sealing the four edges of the sheet material (131).

3. The manufacturing apparatus for paint-free vehicle body panels according to claim 1, characterized in that, The heating device (350) consists of a heating plate and a moving mechanism. The size of the heating plate is the same as or larger than the size of the panel body (100). An infrared heater is arranged on the heating plate. The moving mechanism can move the heating plate to the outside of the sheet material (131) at a certain distance.

4. The manufacturing apparatus for paint-free vehicle body panels according to claim 1, characterized in that, The vacuum device (370) includes an air hole, a vacuum pipeline and a vacuum air source. The air hole is located on the surface of the vacuum adsorption moving mold (310), corresponding to the annular frame of the pressing device (320), and is located inside the annular area of ​​the annular frame. The vacuum pipeline is located inside the vacuum adsorption moving mold (310), with one end connected to the air hole and the other end connected to the vacuum air source outside the vacuum adsorption moving mold (310). The vacuum air source can provide vacuum negative pressure to the vacuum pipeline through control.

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