Integral forming method and system of sandwich structure composite material

Abstract

The invention relates to the technical field of composite material forming, and discloses an integral forming method of a sandwich structure composite material, which comprises the following steps: S100, carrying out roughness polishing treatment to enable the pore edge of a honeycomb surface to contain a microgroove; s200, the honeycomb surface is coated with a medium material through a roller brush roller, and surface pores of the honeycomb plate are filled with the medium material along the gravity and wind force direction of the medium material along with flow guide of the microgrooves; s300, the material sheets are attached to the upper face and the lower face of the cellular board through the coupling layers in an adsorption mode, and a sandwich structure is formed; s400, a forming machine is adopted for forming the sandwich structure; and a molding system. Coupling connection of the fiber-reinforced resin-based composite material sheet and the cellular board in the sandwich structure is achieved, the connecting layer is guided to the deep positions of pores of the cellular board through the microgrooves, and the connecting strength is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of composite material molding, and in particular to an integral molding method and system for a sandwich structure composite material. Background Art

[0002] Honeycomb panels have the advantages of being lightweight and highly rigid. They are approximately 1 / 12 the mass of water of the same volume and 1 / 32 that of aluminum. They have excellent compressive strength and good shear strength. They are characterized by a special honeycomb structure that has excellent energy absorption properties. They can effectively absorb energy, resist impact and share loads, reduce damping vibrations and absorb noise, and can be applied to multiple fields. However, existing honeycomb panels are prone to moisture absorption and expansion in humid environments, resulting in dimensional changes and deformation, and have limited compressive resistance. Although honeycomb panels have high strength and rigidity, their compressive resistance is relatively low. When subjected to large-area pressure or impact from heavy objects, honeycomb panels may deform or break. The current solution to these problems is to use honeycomb panels as sandwich materials and paste resin-based fiber-reinforced composite materials on their upper and lower surfaces. The connection between the two is mostly achieved by gluing the molded resin-based fiber-reinforced composite material sheet to the molded honeycomb panel. However, the bonding strength is not stable enough and is prone to peeling, which greatly reduces the mechanical properties of the laminate.

[0003] Bolted connections require drilling holes in the material, but stress concentration is inevitable at the hole edges, which can reduce product quality to a certain extent. Similarly, welds can also cause stress concentration. Furthermore, the bolt installation, bonding, and welding processes all require very strict operation, making mass production difficult. Summary of the Invention

[0004] The object of the present invention is to provide an integral molding method and system for a sandwich structure composite material, so as to solve the technical problem of insufficient connection strength between different material connection surfaces of sandwich materials in the prior art.

[0005] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: The present invention provides an integral molding method of a sandwich structure composite material, comprising the following steps: S100, reciprocatingly rubbing the honeycomb surfaces on both sides of the honeycomb panel with a grinding plate to remove burrs on the honeycomb surfaces and roughening the surfaces so that microgrooves are formed on the pore edges of the honeycomb surfaces; S200, applying a dielectric material to the honeycomb surface using a roller brush, wherein the dielectric material is filled into the surface pores of the honeycomb panel along the direction of gravity and wind force exerted on the dielectric material as the microgrooves guide the flow, wherein the dielectric material in the microgrooves forms a coupling layer, and the dielectric material in the pores forms a pore-filling medium; S300, placing fiber-reinforced resin-based composite sheets into a mold and performing symmetrical layering, wherein two sheets are adsorbed and bonded to the upper and lower surfaces of the honeycomb panel via the coupling layer to form a sandwich structure; S400 , using a molding machine to mold the sandwich structure, the coupling layer and the pore filling medium are sequentially solidified, and the honeycomb panel is compositely connected to the sheet through the coupling layer and the pore filling medium.

[0006] As a preferred embodiment of the present invention, the dielectric material is any one of a short fiber reinforced resin-based composite material and an epoxy resin; The honeycomb panel is a PP honeycomb panel.

[0007] The present invention also provides an integral forming system for a sandwich structure composite material, comprising a transport device, a grinding component, and a blanking component; The grinding assembly is arranged upstream of the transport device, and the grinding assembly can simultaneously perform roughness grinding on both sides of the honeycomb surface of the honeycomb panel on the transport device; The blanking assembly is arranged downstream of the polishing assembly, and the blanking assembly reciprocatingly rolls the dielectric material onto the honeycomb surfaces on both sides of the honeycomb panel through a roller brush; The transport device is provided with a blower group, which is located downstream of the blanking component and provides wind power for the transport device from bottom to top through a plurality of blowers; The transport device is used to clamp the honeycomb panel and sequentially transport the honeycomb panel from the polishing assembly and the blanking assembly to the top of the blower unit. The blower unit uses wind force to blow the dielectric material on the bottom surface of the honeycomb panel into the pores from bottom to top.

[0008] As a preferred embodiment of the present invention, the blower assembly includes a lifting plate located on the transport device and a plurality of blowers located on the lifting plate, wherein the blowers are arranged in a matrix on the lifting plate, and the lifting plate is used to fix the blowers downstream of the transport device; When the transport device drives the honeycomb panel to move to the elevated plate, the dielectric material located on the upper layer of the honeycomb panel flows from the microgrooves into the pores from top to bottom under the action of gravity, and the dielectric material located on the lower layer of the honeycomb panel flows from the microgrooves into the pores from bottom to top under the action of wind.

[0009] As a preferred solution of the present invention, the transport device includes a track group, one end of the track group is provided with a loading plate, and the other end of the track group is provided with the grinding assembly, the unloading assembly, and the lifting plate in sequence; The loading plate is used to place the honeycomb panel horizontally on the track group. The track group is connected to a clamping assembly through a linear motion module. The clamping assembly is used to horizontally clamp the honeycomb panel located on the loading plate. The linear motion module drives the honeycomb panel on the clamping assembly to pass horizontally through the polishing assembly and the unloading assembly in sequence at the height of the horizontal process surface.

[0010] As a preferred solution of the present invention, the track assembly includes two parallel chutes, and the ends of the chutes extend toward the lifting plate; The linear motion module includes a sliding table arranged in the slide groove, a pushing block is arranged in the sliding table, and the pushing block is connected to a reciprocating rotary swing motor. The pushing blocks located in different sliding tables are in contact with the slide groove, and the pushing blocks respectively drive the sliding tables to move through the reciprocating rotary swing motor; The other side of the sliding platform is connected to a slider via a first telescopic rod. The connected sliding platform and the slider are arranged in the same sliding groove. The sliding platform drives the slider to move. The first telescopic rod is connected to a first pump body. The first pump body can drive the first telescopic rod to extend and retract, thereby changing the distance between the sliding platform and the slider in the same sliding groove.

[0011] As a preferred solution of the present invention, the reciprocating rotary swing motor and the first pump body are connected to a control component, which is used to control the rotation direction of the reciprocating rotary swing motor, thereby controlling the moving direction of the sliding platform in the slide groove, and the control component is used to control the length of the first telescopic rod through the first pump body.

[0012] As a preferred solution of the present invention, the clamping assembly includes support rods, which are respectively provided on the sliding platform and the slider, and the two support rods located on the sliding platform and the two support rods located on the two sliders are connected by U-shaped clips, the two U-shaped clips are arranged opposite to each other and fixedly installed at the height of the horizontal process surface, and as the first telescopic rod is extended and retracted, the distance between the two U-shaped clips also changes accordingly; A second telescopic rod is provided at the bottom of the loading plate, and the second telescopic rod is connected to a second pump body. The second pump body can drive the second telescopic rod to extend and retract, thereby driving the loading plate to move up and down. When the U-shaped clip is located on the loading plate, the loading plate is lifted to between the two U-shaped clips through the height lifting honeycomb panel.

[0013] As a preferred solution of the present invention, the grinding assembly includes a first frame located between the two slide grooves, the first frame is connected to a grinding plate, the surface of the grinding plate is rough, two grinding plates are provided and are respectively installed on the upper and lower sides of the plane where the U-shaped clip is located, the distance between the two grinding plates is the thickness of the honeycomb panel, as the U-shaped clip moves along the slide groove, the U-shaped clip can drive the honeycomb panel to pass through between the two grinding plates, and the reciprocating rotary swing motor can drive the grinding plate to perform roughness grinding on the honeycomb panel by reciprocating rotation.

[0014] As a preferred solution of the present invention, the unloading assembly includes a second frame located between the two chutes, the second frame being located downstream of the first frame, a roller brush being rotatably mounted on the second frame, the roller brush being connected to a feeding pipe, and the feeding pipe being used to transfer the medium material to the surface of the roller brush; Two roller brushes are provided and are respectively installed on the upper and lower sides of the plane where the U-shaped clamp is located. As the U-shaped clamp moves along the slide groove, the U-shaped clamp can pass through the two roller brushes and be squeezed by the roller brushes. During the squeezing process, the roller brushes transfer the dielectric material to the upper and lower honeycomb surfaces of the honeycomb panel.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention polishes the upper and lower surfaces of the honeycomb panel to form a relatively flat connecting plane. The connecting plane is provided with microgrooves capable of guiding the dielectric material. When the dielectric material is subsequently roller-coated, excess dielectric material can penetrate into the pores of the honeycomb panel along the direction of gravity and wind force under the guidance of the microgrooves, forming a pore-filling medium. During subsequent curing, the microgrooves and the pore-filling medium form a coupling and pore-filling medium composite connecting layer in a sandwich structure with the honeycomb panel as the core, thereby increasing the contact area between the sheet and the honeycomb panel, improving the fixing effect of the coupling layer, and reducing the deformation of the honeycomb panel. The pore-filling medium of the present invention can penetrate deeply into the surface pores of the honeycomb panel. When the fiber-reinforced resin-based composite sheet is subjected to force, the coupling layer can transmit the force to the pore-filling medium. The pore-filling medium can then transmit the tensile force and impact force exerted on the fiber-reinforced resin-based composite sheet and the coupling layer to the interior of the honeycomb panel. The honeycomb panel can absorb the force, thereby eliminating the tensile force or impact force exerted on the fiber-reinforced resin-based composite sheet and ensuring a good connection effect. The production system provided by the present invention has a simple structure and can speed up the production cycle, thereby simplifying the processing process of the honeycomb panels and facilitating batch production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0017] Figure 1 The present invention provides a schematic flow chart of an overall forming method of a sandwich structure composite material; Figure 2 The present invention provides a schematic structural diagram of a cured product obtained by an integral molding method of a sandwich structure composite material; Figure 3 The present invention provides Figure 2 A schematic structural diagram of an integral molding system for a sandwich structure composite material in the embodiment shown; Figure 4 The present invention provides Figure 2 A schematic structural diagram of a method and system for integrally forming a sandwich structure composite material in the embodiment shown; Figure 5 The present invention provides Figure 2 A schematic structural diagram of a method and system for integrally forming a sandwich structure composite material in the embodiment shown; Figure 6 The present invention provides Figure 2 The illustrated embodiment is a schematic structural diagram of a method and system for integrally forming a sandwich structure composite material.

[0018] The numbers in the figure represent the following: 1- transport device; 2- grinding assembly; 3- blanking assembly; 4- blower unit; 101-chute; 102-loading plate; 103-linear motion module; 104-clamping assembly; 105-second telescopic rod; 106-second pump body; 1031 - sliding platform; 1032 - pushing block; 1033 - first telescopic rod; 1034 - slider; 1035 - first pump body; 1041-support rod; 1042-U-shaped clamp; 201-first frame; 202-grinding plate; 301-second frame; 302-roller brush-; 303-feeding pipe; 401-lifting plate; 402-blower. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figure 1 As shown, the present invention provides an integral molding method of a sandwich structure composite material, comprising the following steps: S100, rubbing the honeycomb surfaces on both sides of the honeycomb panel back and forth with a grinding plate to remove burrs on the honeycomb surfaces and to roughen the honeycomb surfaces so that microgrooves are formed on the pore edges of the honeycomb surfaces; S200, applying dielectric material to the honeycomb surface using a roller brush, and the dielectric material is filled into the surface pores of the honeycomb panel along the direction of gravity and wind force along the microgrooves. The dielectric material in the microgrooves forms a coupling layer, and the dielectric material in the pores forms a pore-filling medium. S300, placing fiber-reinforced resin-based composite sheets into a mold and performing symmetrical layering, wherein the two sheets are adsorbed and bonded to the upper and lower surfaces of the honeycomb panel via a coupling layer to form a sandwich structure; S400: Using a forming machine to form the sandwich structure, the coupling layer and the pore filling medium are cured in sequence, and the honeycomb panel is compositely connected to the sheet through the coupling layer and the pore filling medium.

[0021] Due to the fluidity of the dielectric material, the pore-filling dielectric can be deeply embedded in the surface pores of the honeycomb panel under the influence of the flow-guiding structure and force. Through the connection between the pores and the dielectric material in the microgrooves, the coupling layer is pulled and fixed through the composite embedding. Without the guidance and force, the dielectric material has tension and limited fluidity, making it difficult to flow deep into the pores and fully contact the internal pores of the honeycomb panel.

[0022] The present invention performs a grinding process on the upper and lower surfaces of the honeycomb panel to form a relatively flat connection plane, and the connection plane is provided with micro grooves that can guide the dielectric material. When the dielectric material is subsequently roller-coated, the excess dielectric material can penetrate into the pores of the honeycomb panel along the direction of gravity and wind force under the guidance of the micro grooves to form a pore-filling medium. During subsequent solidification, the micro grooves and the pore-filling medium form a coupling and pore-filling medium composite connection layer in a sandwich structure with the honeycomb panel as the core, thereby enhancing the interlayer compositeness and coupling of the PP honeycomb panel and the fiber resin-based composite material, avoiding defects in the contact boundary and the connection part, and increasing the contact area between the sheet and the honeycomb panel, thereby improving the fixing effect of the coupling layer and reducing the deformation of the honeycomb panel.

[0023] At the same time, when the fiber-reinforced resin-based composite sheet is subjected to force, the coupling layer can transmit the force to the pore-filling medium, and the pore-filling medium can transmit the tension and impact force exerted on the fiber-reinforced resin-based composite sheet and the coupling layer to the interior of the honeycomb panel. The honeycomb panel can absorb the force, thereby eliminating the tension or impact force exerted on the fiber-reinforced resin-based composite sheet and ensuring the connection effect.

[0024] At the same time, the microgrooves can retain part of the dielectric material on the honeycomb panel, extend the thickness of the fixing layer, and the bottom of the fixing layer is the pore filling medium that flows into the inner wall of the pores, so as to increase the contact area between the honeycomb surface and the dielectric material, thereby improving the fixing effect after curing, and the dielectric material located on the grooves can couple and fix the honeycomb panel and the fiber reinforced resin-based composite material, and can absorb the force exerted on the fiber reinforced resin-based composite material, thereby reducing the probability of cracking at the joint due to the force exerted on the fiber reinforced resin-based composite material.

[0025] It can be seen that the forming method provided by the present invention roughens the honeycomb panel by grinding, so that tiny serrations are formed on the edges of its micropores, i.e., a microgroove structure. The microgroove structure can drive the fluid dielectric material to flow into the gaps, thereby reducing the situation where the dielectric material cannot flow into some small pores due to tension, and improving the filling effect of the dielectric material on the honeycomb panel.

[0026] The dielectric material can be selected from any material with good fluidity, strong adsorption capacity and curability. Preferably, the dielectric material is any one of short fiber reinforced resin-based composite material and epoxy resin.

[0027] The honeycomb panel is a PP honeycomb panel, which has the characteristics of light weight, high rigidity, sound insulation and noise reduction, and high energy absorption. The density of the PP honeycomb panel is 0.7-0.92g / cm 3 , with an average thickness of 1-5mm. Fiber reinforcement materials: as the structure mainly responsible for mechanical properties, different reinforcing fiber materials are selected based on their mechanical properties and cost considerations; The resin matrix, primarily responsible for flame retardancy, heat insulation, waterproofing, and moisture resistance, is made of a thermosetting resin with higher heat resistance and superior waterproofing and moisture resistance. The PP honeycomb core is constructed of panels with varying densities, thicknesses, and honeycomb diameters, depending on the product's desired functionality, such as sound insulation, weight reduction, and energy absorption. Pore filling materials include short fiber-reinforced resin-based composites and epoxy resin sheets. The mold can be made of steel, with the mold structure designed to suit the specific molding process.

[0028] The molding process is any one of a vacuum infusion process, a PCM prepreg molding process, a vacuum bag pressing process, and an autoclave process.

[0029] The overall forming method of the above-mentioned sandwich structure composite material can be manual transportation, that is, the honeycomb panels are transported to the grinding plate for grinding, and the material is smeared and filled in the roller brush, and manually placed in the mold for layering. After forming the sandwich structure, it is placed in the molding machine for molding.

[0030] The molding process can be vacuum introduction, PCM molding, vacuum bag pressing, autoclave hot pressing, etc. As the molding process changes, the molding machine can also be changed accordingly, as long as it can achieve hot pressing molding.

[0031] The structure of the cured product obtained by the integral molding method of the sandwich structure composite material is shown in the figure Figure 2 shown.

[0032] However, the difficulty of manual processing is as follows: First, when processing this honeycomb panel, both the upper and lower surfaces need to be processed, and the panel needs to be flipped during processing. In actual production, flipping the panel may cause the flow direction of the medium material in the pores to change, resulting in poor molding effect of the pore-filling medium. In order to solve this problem, Figure 3 As shown in the figure, the present invention provides a sandwich structure composite material integral molding system, which is used to perform the above-mentioned sandwich structure composite material integral molding method, and is characterized in that it includes a transportation device 1, a grinding component 2, a blanking component 3, a mold, and a molding machine.

[0033] The grinding assembly 2 is arranged upstream of the transport device 1 , and the grinding assembly 2 simultaneously grinds the roughness of the honeycomb surfaces on both sides of the honeycomb panel on the transport device 1 .

[0034] The blanking assembly 3 is arranged downstream of the polishing assembly 2. The blanking assembly 3 reciprocatingly rolls the dielectric material onto the honeycomb surfaces on both sides of the honeycomb panel through a roller brush.

[0035] The transport device 1 is provided with a blower unit 4 , which is located downstream of the blanking component 3 . The blower unit 4 provides wind power to the transport device 1 from bottom to top through a plurality of blowers.

[0036] Among them, the transport device 1 is used to clamp the honeycomb panel and transport the honeycomb panel from the grinding assembly 2 and the unloading assembly 3 to the top of the blower unit 4 in sequence. The blower unit 4 uses wind force to blow the medium material on the bottom surface of the honeycomb panel into the pores from bottom to top.

[0037] After a certain period of time, the honeycomb panel on the transport device 1 is removed and transported to the mold pitch where fiber-reinforced resin-based composite sheets have been laid, and then symmetrically laid. The two sheets are adsorbed and bonded to the upper and lower surfaces of the honeycomb panel through the coupling layer to form a sandwich structure. The sandwich structure is manually transported to the molding machine, which is used to mold the sandwich structure in the mold.

[0038] In the present invention, there is no need to flip the honeycomb panel, and a single assembly line production system can be used to complete the double-sided processing of the honeycomb panel. Through the cooperation of the transportation device and the blower, the dielectric material located on the bottom surface of the honeycomb panel is blown into the pores at the bottom, completing the partial filling of the bottom pores and reducing the situation of the dielectric material flowing in an eccentric direction due to gravity.

[0039] The blower unit 4 includes a lifting plate 401 located on the transport device 1 and a plurality of blowers 402 located on the lifting plate 401 . The blowers 402 are arranged in a matrix on the lifting plate 401 . The lifting plate 401 is used to fix the blowers 402 downstream of the transport device 1 .

[0040] When the transport device 1 drives the honeycomb panel to move onto the lifting plate 401, the dielectric material located on the upper layer of the honeycomb panel flows from the microgrooves into the pores from top to bottom under the action of gravity, and the dielectric material located on the lower layer of the honeycomb panel flows from the microgrooves into the pores from bottom to top under the action of wind. The wind force of the blower 402 is controllable, thereby facilitating the dielectric material to enter the pores and increasing the contact area between the dielectric material and the honeycomb panel.

[0041] Since both sides of the honeycomb panel need to be processed at the same time, and ordinary manipulators and conveyor belts cannot keep it in a fixed clamping, grinding and roller coating state at the same time during transportation, a new transportation device is needed to realize the transportation of the honeycomb group. The transportation device 1 includes a track group, and a loading plate 102 is provided at one end of the track group, and a grinding component 2, a discharge component 3, and a lifting plate 401 are sequentially provided at the other end of the track group.

[0042] The loading plate 102 is used to place the honeycomb panel horizontally on the track group. The track group is connected to the clamping assembly 104 through the linear motion module 103. The clamping assembly 104 is used to horizontally clamp the honeycomb panel located on the loading plate 102. The linear motion module 103 drives the honeycomb panel on the clamping assembly 104 to pass through the polishing assembly 2 and the unloading assembly 3 horizontally in sequence at the height of the horizontal process surface.

[0043] In the device disclosed in the present invention, the honeycomb panels can be transferred only by the clamping of the transport device 1 and the movement of the linear motion module 103 , which reduces the production process and has a high degree of automation.

[0044] Furthermore, the track assembly includes two parallel chutes 101 , and the ends of the chutes 101 extend toward the lifting plate 401 . In this embodiment, the chutes 101 are linear, and the linear chutes 101 are easy to maintain.

[0045] The linear motion module 103 includes a sliding table 1031 arranged in the slide groove 101, and a pushing block 1032 is arranged in the sliding table 1031. The pushing block 1032 is connected to a reciprocating rotary swing motor. The pushing blocks 1032 located in different sliding tables 1031 are in contact with the slide groove 101, and the pushing blocks 1032 drive the sliding tables 1031 to move respectively through the reciprocating rotary swing motor.

[0046] The other side of the sliding platform 1031 is connected to a slider 1034 via a first telescopic rod 1033. Specifically, the sliding platform 1031 and the slider 1034 within the same chute 101 are connected together. Specifically, the distance between the sliding platform 1031 and the slider 1034 can be controlled. The connected sliding platform 1031 and the slider 1034 are disposed within the same chute 101. The sliding platform 1031 drives the slider 1034 to move. The first telescopic rod 1033 is connected to a first pump 1035, which can drive the first telescopic rod 1033 to extend and retract, thereby changing the distance between the sliding platform 1031 and the slider 1034 within the same chute 101.

[0047] In order to facilitate the clamping of the honeycomb panel, the reciprocating rotary swing motor and the first pump body 1035 are connected with a control component. The control component is used to control the rotation direction of the reciprocating rotary swing motor, thereby controlling the moving direction of the sliding platform 1031 in the slide groove 101. The control component can also be used to control the length of the first telescopic rod 1033 through the first pump body 1035.

[0048] The control methods of the first pump body 1035 and the reciprocating rotary swing motor are independent of each other.

[0049] In order to facilitate the horizontal clamping of the honeycomb panel, the clamping assembly 104 includes a support rod 1041, which is respectively arranged on the sliding platform 1031 and the slider 1034. The two support rods 1041 located on the sliding platform 1031 and the two support rods 1041 located on the two sliders 1034 are connected by U-shaped clips 1042. The two U-shaped clips 1042 are arranged opposite to each other and fixedly installed at the height of the horizontal process plane. As the first telescopic rod 1033 is extended and retracted, the distance between the two U-shaped clips 1042 also changes accordingly.

[0050] A second telescopic rod 105 is provided at the bottom of the loading plate 102, and the second telescopic rod 105 is connected to the second pump body 106. The second pump body 106 can drive the second telescopic rod 105 to extend and retract, thereby driving the loading plate 102 to rise and fall. When the U-shaped clip 1042 is located on the loading plate 102, the loading plate 102 is lifted to between the two U-shaped clips 1042 through the height lifting honeycomb panel.

[0051] When the honeycomb panel is lifted to between the two U-shaped clamps 1042, the control component controls the first pump body 1035 to move, so that the distance between the U-shaped clamps 1042 is reduced, thereby completing the clamping of the honeycomb panel, so that the honeycomb panel is fixed on the horizontal process surface, and as the sliding platform 1031 moves, the honeycomb panel can move along the slide 101.

[0052] In order to facilitate the grinding of the honeycomb panel, the grinding assembly 2 includes a first frame 201 located between the two slide grooves 101. The first frame 201 is connected to a grinding plate 202. The surface of the grinding plate 202 is rough. Two grinding plates 202 are provided and are respectively installed on the upper and lower sides of the plane where the U-shaped clip 1042 is located. The distance between the two grinding plates 202 is the thickness of the honeycomb panel. As the U-shaped clip 1042 moves along the slide groove 101, the U-shaped clip 1042 can drive the honeycomb panel to pass through between the two grinding plates 202. The reciprocating rotary swing motor can drive the grinding plate 202 to perform roughness grinding on the honeycomb panel by reciprocating rotation.

[0053] The grinding plate 202 can grind the upper and lower surfaces of the honeycomb panel at the same time during grinding, so as to eliminate the burrs on the honeycomb panel. At the same time, its rough surface can form micro grooves on the honeycomb panel that can flow back and retain the dielectric material. The micro grooves can eliminate the surface tension of the dielectric material caused by subsequent roller coating, so that it can flow into the pores.

[0054] The material discharge structure can be done in many ways, such as spraying, soaking, etc., but the characteristic of the coupling layer is that it is evenly attached to the micro-grooves and can penetrate into the pores under gravity and wind. Spraying cannot ensure that the dielectric material falls evenly from the micro-grooves, and soaking will slow down the production cycle. Therefore, this embodiment uses a roller method to improve the homogeneity of the dielectric material when it is discharged.

[0055] The unloading component 3 includes a second frame 301 located between the two chutes 101. The second frame 301 is located downstream of the first frame 201. A roller brush 302 is rotatably mounted on the second frame 301. The roller brush 302 is connected to a feeding pipe 303. The feeding pipe 303 is used to transfer the medium material to the surface of the roller brush 302.

[0056] The two drum brushes 302 are arranged on the upper and lower sides of the plane where the U-shaped clamps 1042 are located, and as the U-shaped clamps 1042 move along the sliding groove 101, the U-shaped clamps 1042 can pass through the two drum brushes 302 and be extruded by the drum brushes 302, and the drum brushes 302 can transfer the medium material to the upper and lower honeycomb surfaces of the honeycomb plate during the extrusion.

[0057] As the thickness of the honeycomb plate changes, the thickness of the grinding plate 202 and the diameter of the drum brush 302 can be changed accordingly to adapt to honeycomb plates of different thicknesses.

[0058] The use method of the system disclosed in the present application is as follows: 1. Place the honeycomb plate horizontally on the feeding plate 102, drive the U-shaped clamps 1042 to above the feeding plate 102 by sliding the sliding table 1031, and make the distance between the sliding table 1031 and the sliding block 1034 maximum by the first pump body 1035; 2. Raise the second telescopic rod 105 by driving the second pump body 106, so that the feeding plate 102 is raised to the horizontal flow surface, i.e. the position of the U-shaped clamps 1042, and the action of the second telescopic rod 105 stops, and the distance between the sliding table 1031 and the sliding block 1034 is reduced by driving the first pump body 1035 by the control assembly, until the two U-shaped clamps 1042 form clamping on the honeycomb plate; 3. Lower the second telescopic rod 105 by the second pump body 106, drive the support rod 1041 to slide by the sliding table 1031, and drive the honeycomb plate to move by the U-shaped clamps 1042, and when the honeycomb plate passes through the grinding plate 202, the sliding table 1031 reciprocally moves so that the grinding plate 202 can repeatedly polish the honeycomb plate, until the burrs on the honeycomb plate are polished and micro grooves are formed on the circumferential side of the pores; 4. After polishing, the sliding table 1031 continuously drives the honeycomb plate into the drum brush 302 downstream, and as it continuously moves, the medium material in the drum brush 302 is roller coated into the micro grooves and the excess material is roller coated into the pores; 5. After roller coating, the sliding table 1031 continuously drives the U-shaped clamps 1042 to the lifting plate 401, and the air blower 402 on the lifting plate 401 is opened, so that the medium material in the pores below the honeycomb plate is deeply filled into the pores under the action of the wind, and the medium material in the pores above the honeycomb plate is deeply filled into the pores under the action of gravity and the micro groove flow guide, forming the pore filling medium on the upper and lower surfaces; 6. Take the processed honeycomb plate from the U-shaped clamps 1042 and place it in the mold to form a sandwich structure with the fiber reinforced resin matrix composite sheet, the honeycomb plate is the core, and the sheet is adsorbed and attached to the upper and lower surfaces of the honeycomb plate through the coupling layer; 7. A forming machine is used to form the sandwich structure, the coupling layer and the pore filling medium are cured in sequence, and the honeycomb panel is compositely connected to the sheet through the coupling layer and the pore filling medium.

[0059] Through the overall forming method and system of the sandwich structure composite material of this embodiment, the coupling connection between the fiber-reinforced resin-based composite sheet and the honeycomb panel in the sandwich structure can be realized, and the connecting layer can be guided to the deep pores of the honeycomb panel through the microgrooves, so that it has a double connection effect, improves the connection strength, and has a simple preparation process and a fast production pace.

[0060] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. A method for integrally forming a sandwich structure composite material, characterized in that: The steps include: S100, reciprocatingly rubbing the honeycomb surfaces on both sides of the honeycomb panel with a grinding plate to remove burrs on the honeycomb surfaces and roughening the surfaces so that microgrooves are formed on the pore edges of the honeycomb surfaces; S200, applying a dielectric material to the honeycomb surface using a roller brush, wherein the dielectric material is filled into the surface pores of the honeycomb panel along the direction of gravity and wind force exerted on the dielectric material as the microgrooves guide the flow, wherein the dielectric material in the microgrooves forms a coupling layer, and the dielectric material in the pores forms a pore-filling medium; S300, placing fiber-reinforced resin-based composite sheets into a mold and performing symmetrical layering, wherein two sheets are adsorbed and bonded to the upper and lower surfaces of the honeycomb panel via the coupling layer to form a sandwich structure; S400 , using a molding machine to mold the sandwich structure, the coupling layer and the pore filling medium are sequentially solidified, and the honeycomb panel is compositely connected to the sheet through the coupling layer and the pore filling medium.

2. The integral molding method of a sandwich structure composite material according to claim 1, characterized in that: The dielectric material is any one of short fiber reinforced resin-based composite material and epoxy resin; The honeycomb panel is a PP honeycomb panel.

3. A sandwich structure composite material integral molding system, used for carrying out the sandwich structure composite material integral molding method according to any one of claims 1-2, characterized in that: It includes a transport device (1), a grinding component (2), and a blanking component (3); The grinding assembly (2) is arranged upstream of the transport device (1), and the grinding assembly (2) is capable of simultaneously performing roughness grinding on both sides of the honeycomb surface of the honeycomb plate located on the transport device (1); The blanking assembly (3) is arranged downstream of the polishing assembly (2), and the blanking assembly (3) reciprocatingly rolls the dielectric material onto the honeycomb surfaces on both sides of the honeycomb panel through a roller brush; The transport device (1) is provided with a blower group (4), the blower group (4) is located downstream of the blanking component (3), and the blower group (4) provides wind power for the transport device (1) from bottom to top through a plurality of blowers; The transport device (1) is used to clamp the honeycomb panel and sequentially transport the honeycomb panel from the polishing assembly (2) and the blanking assembly (3) to the top of the blower unit (4). The blower unit (4) blows the dielectric material located on the bottom surface of the honeycomb panel into the pores from bottom to top through wind force.

4. The integral molding system of a sandwich structure composite material according to claim 3, characterized in that: The blower group (4) comprises a lifting plate (401) located on the transport device (1) and a plurality of blowers (402) located on the lifting plate (401), wherein the blowers (402) are arranged in a matrix on the lifting plate (401), and the lifting plate (401) is used to fix the blowers (402) downstream of the transport device (1); When the transport device (1) drives the honeycomb panel to move onto the lifting plate (401), the dielectric material located on the upper layer of the honeycomb panel flows from the microgrooves to the pores from top to bottom under the action of gravity, and the dielectric material located on the lower layer of the honeycomb panel flows from the microgrooves to the pores from bottom to top under the action of wind.

5. The integral molding system of a sandwich structure composite material according to claim 4, characterized in that: The transport device (1) comprises a track group, one end of which is provided with a loading plate (102), and the other end of which is provided with the grinding assembly (2), the unloading assembly (3), and the lifting plate (401) in sequence; The loading plate (102) is used to place the honeycomb panel horizontally on the track group. The track group is connected to a clamping assembly (104) through a linear motion module (103). The clamping assembly (104) is used to horizontally clamp the honeycomb panel located on the loading plate (102). The linear motion module (103) drives the honeycomb panel on the clamping assembly (104) to horizontally pass through the grinding assembly (2) and the unloading assembly (3) in sequence at the height of the horizontal process surface.

6. The integral molding system of a sandwich structure composite material according to claim 5, characterized in that: The track assembly comprises two parallel chute grooves (101), with ends of the chute grooves (101) extending toward the lifting plate (401); The linear motion module (103) includes a sliding table (1031) arranged in the sliding groove (101), a pushing block (1032) is arranged in the sliding table (1031), and the pushing block (1032) is connected to a reciprocating rotary swing motor. The pushing blocks (1032) located in different sliding tables (1031) are in contact with the sliding groove (101), and the pushing blocks (1032) respectively drive the sliding tables (1031) to move through the reciprocating rotary swing motor. The other side of the sliding platform (1031) is connected to a slider (1034) via a first telescopic rod (1033). The connected sliding platform (1031) and the slider (1034) are arranged in the same slide groove (101). The sliding platform (1031) drives the slider (1034) to move. The first telescopic rod (1033) is connected to a first pump body (1035). The first pump body (1035) can drive the first telescopic rod (1033) to extend and retract, thereby changing the distance between the sliding platform (1031) and the slider (1034) in the same slide groove (101).

7. The integral molding system of a sandwich structure composite material according to claim 6, characterized in that: The reciprocating rotary swing motor and the first pump body (1035) are connected to a control component, and the control component is used to control the rotation direction of the reciprocating rotary swing motor, thereby controlling the moving direction of the sliding table (1031) in the sliding groove (101), and the control component is used to control the length of the first telescopic rod (1033) through the first pump body.

8. The integral molding system of a sandwich structure composite material according to claim 7, characterized in that: The clamping assembly (104) includes a support rod (1041), and the support rod (1041) is respectively arranged on the sliding platform (1031) and the slider (1034). The two support rods (1041) located on the sliding platform (1031) and the two support rods (1041) located on the two sliders (1034) are connected by a U-shaped clamp (1042). The two U-shaped clamps (1042) are arranged opposite to each other and fixedly installed at the height of the horizontal process surface. As the first telescopic rod (1033) is extended and retracted, the distance between the two U-shaped clamps (1042) also changes accordingly. A second telescopic rod (105) is provided at the bottom of the loading plate (102), and the second telescopic rod (105) is connected to a second pump body (106). The second pump body (106) can drive the second telescopic rod (105) to extend and retract, thereby driving the loading plate (102) to move up and down. When the U-shaped clamp (1042) is located on the loading plate (102), the loading plate (102) is lifted to between the two U-shaped clamps (1042) by the height lifting honeycomb panel.

9. The integral molding system of a sandwich structure composite material according to claim 8, characterized in that: The grinding assembly (2) includes a first frame (201) located between the two chute (101), the first frame (201) is connected to a grinding plate (202), the surface of the grinding plate (202) is rough, two grinding plates (202) are provided and are respectively installed on the upper and lower sides of the plane where the U-shaped clamp (1042) is located, the distance between the two grinding plates (202) is the thickness of the honeycomb panel, as the U-shaped clamp (1042) moves along the chute (101), the U-shaped clamp (1042) can drive the honeycomb panel to pass through between the two grinding plates (202), and the reciprocating rotary swing motor can drive the grinding plates (202) to perform roughness grinding on the honeycomb panel by reciprocating rotation.

10. The integral molding system of a sandwich structure composite material according to claim 9, characterized in that: The unloading assembly (3) comprises a second frame (301) located between the two chutes (101), the second frame (301) being located downstream of the first frame (201), a roller brush (302) being rotatably mounted on the second frame (301), the roller brush (302) being connected to a feeding tube (303), and the feeding tube (303) being used to transfer the medium material to the surface of the roller brush (302); Two roller brushes (302) are provided and are respectively installed on the upper and lower sides of the plane where the U-shaped clamp (1042) is located. As the U-shaped clamp (1042) moves along the slide groove (101), the U-shaped clamp (1042) can pass through the two roller brushes (302) and be squeezed by the roller brushes (302). During the squeezing process, the roller brushes (302) transfer the dielectric material to the upper and lower honeycomb surfaces of the honeycomb panel.

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