A wood-plastic composite material with 3D texture and its preparation process

Abstract

The present invention provides a wood-plastic-based composite material with 3D texture and a preparation process thereof, which belongs to the technical field of 3D wood-plastic material preparation. It solves the technical problems of the single functionality of existing wood-plastic composite materials and the inability to customize the material texture. The structure of the wood-plastic-based composite material with 3D texture of the present invention is a functionalized protective layer, an additive printing texture layer and a wood-plastic base material layer from the surface to the core, and the interlayer composite is achieved by surface heating and melting and interlayer mutual pressure. The preparation process includes the following steps: extrusion preparation of wood-plastic base material, shaping, 3D texture printing, laminating and finished product processing. The present invention prepares a composite material by extrusion preparation of wood-plastic base material, cooling and shaping, 3D printing texture, conveying and positioning, synchronous film release, relaxation and oscillation film, hot air circulation preheating, multi-angle dynamic wind pressure laminating, cold air circulation cooling, film cutting and heat sealing, and finished product processing. The preparation process has high efficiency and low energy consumption. The prepared composite material has good structural effect, meets the multifunctional requirements, and the finished product is more stable.

Description

Technical Field

[0001] The invention belongs to the technical field of 3D wood-plastic material preparation, and in particular relates to a multifunctional wood-plastic-based composite material with 3D texture and a preparation process thereof. Background Art

[0002] As a green and environmentally friendly composite material, wood-plastic composite materials mainly use thermoplastic polymers such as polyethylene, polypropylene and polyvinyl chloride, mixed with a certain amount of biomass fiber materials such as wood, bamboo, hemp, cotton, rice husk, wheat straw, coconut shell, tea shell, peanut shell, etc., and then extruded, molded and injected. As a green and environmentally friendly composite material, wood-plastic composite materials have gradually been recognized by consumers for their outstanding advantages such as light weight, high strength, water and moisture resistance, corrosion resistance, anti-insect resistance, weather resistance and creep resistance. In recent years, the wood-plastic industry has shown a rapid development trend, and it is expected that the global output value of wood-plastic composite materials will exceed US$12.5 billion by 2027. However, compared with the traditional man-made board industry, the total output value of wood-plastic composite materials is still less than one-tenth of it. The main reason for this phenomenon is that the application field of wood-plastic composite materials is narrow, mostly concentrated in low-value-added fields such as outdoor flooring, garden landscape, guardrail, fence board, etc., while the market share of high-value-added fields such as interior decoration and furniture is very low.

[0003] The reason is that, on the one hand, the texture of wood-plastic composite materials is single, and the existing process technology for preparing wood-plastic composite materials is simple texture produced by embossing after color powder and masterbatch coloring, which cannot meet the personalized customization needs of consumers in the interior decoration industry. In addition, this process has high energy consumption, low preparation efficiency, and poor material pressing effect. On the other hand, because most of the existing wood-plastic composite materials have single functions, it is difficult to meet the diversified requirements of the furniture industry such as anti-slip, flame retardant, antistatic, wear resistance, and heat resistance. Another reason is that the existing composite materials are used on a flat surface during the rolling process. Conventional rolling or flat pressing will also cause the 3D texture to be compressed and deformed. At the same time, conventional rolling or flat pressing is difficult to make the film layer form an effective global combination with the complex 3D texture surface, and there will always be problems of bubbles or loose combination. Therefore, it is urgent to develop a new technology to prepare a new series of wood-plastic products, so that they have complex and colorful textures and diversified performance, so as to break through the market shackles and create huge value. Summary of the invention

[0004] The purpose of the present invention is to overcome the existing technology and provide a multifunctional wood-plastic-based composite material with 3D texture and its preparation process. The technical problem to be solved by the invention is: how to realize the process of preparing wood-plastic substrate by extrusion, cooling and shaping wood-plastic substrate, 3D printing texture, conveying and positioning wood-plastic substrate, synchronous film release, relaxation oscillation film, hot air circulation preheating, multi-angle dynamic wind pressure lamination, cold air circulation cooling, film cutting and heat sealing, fixed-length cutting and stacking to prepare a multifunctional wood-plastic-based composite material with 3D texture and stable structure.

[0005] The technical solution adopted by the present invention is:

[0006] A wood-plastic composite material with 3D texture, the structure of the composite material from the surface to the core is a functionalized protective layer, an additive printing texture layer, and a wood-plastic base material layer, wherein the functionalized protective layer, the additive printing texture layer, and the wood-plastic base material layer are formed by heating and melting the layers and pressing each other between the layers, wherein:

[0007] The functionalized protective layer is a multifunctional plastic layer with transparent or translucent properties, wherein the mass ratio of the plastic matrix is ​​not less than 40%, and the mass ratio of the ion polymer is 10%-25%;

[0008] The additive printing texture layer is a 3D texture layer with complex and multi-colors prepared by additive materials;

[0009] The wood-plastic substrate layer is prepared by compounding 30 to 85 parts by weight of biomass fibers, 15 to 65 parts by weight of plastics, 6 to 15 parts by weight of an easily precipitated interface compatibilizer, 2 to 12 parts by weight of an interface compatibilizer that is not easily precipitated, 0.4 to 12 parts by weight of a pigment, and 4 to 15 parts by weight of a processing aid; the easily precipitated interface compatibilizer is precipitated during the melting process of the wood-plastic substrate, fixed on the surface, and directly forms an interface bond with the additive printing texture layer.

[0010] Preferably, in the functionalized protective layer, the plastic matrix is ​​at least one of polystyrene (PS), polycarbonate (PC), polyethylene terephthalate (PET), polyethylene terephthalate-1,4-cyclohexanedimethanol (PETG), acrylonitrile-styrene copolymer (AS), butadiene-styrene copolymer (BS), styrene-methyl methacrylate copolymer (MS), methyl methacrylate-butadiene-styrene copolymer (MBS), polymethyl methacrylate (PMMA), transparent acrylonitrile-butadiene-styrene copolymer (ABS), transparent polypropylene (PP), transparent polyvinyl chloride (PVC), transparent polyamide (PA), translucent polyethylene (PE), translucent PP, translucent PA and translucent polyvinyl butyral (PVB);

[0011] The ionic polymer is selected from at least one of sodium ionic polymers (Surlyn 8920, 8528, 8320, 8020, 1601), zinc ionic polymers (Surlyn 9721, 9945, 9910, 9520, 9320, 9120), and lithium sodium ionic polymers (Surlyn 7940).

[0012] In the functionalized protective layer, the selection of the plastic matrix and the ionic polymer belongs to the prior art and has no influence on the separation performance of the wood-plastic composite material of the present invention.

[0013] Preferably, the functionalized protective layer further comprises 0.5%-5% by weight of nano-scale metal oxide, 4%-15% of thermoplastic elastomer, 0.1%-1% of ultraviolet absorber, 0.2%-2% of lubricant, 0.1%-0.5% of antioxidant, and 2%-10% of ZSM-5 zeolite. The selection of the above ingredients and specific materials can enhance the strength of the wood-plastic composite material and has no effect on the separation performance of the wood-plastic composite material.

[0014] The thermoplastic elastomer is at least one of olefin elastomer, styrene elastomer and diene elastomer; the nano-scale metal oxide is at least one of nano-titanium dioxide, nano-aluminum oxide and nano-zinc oxide; the ion polymer is selected from sodium ion polymer (Surlyn 8920, 8528, 8320, 8020, 1601), zinc ion polymer (Surlyn 9721, 9945, 9910, 9520, 9320, 9120), lithium sodium ion polymer (Surlyn 7940), the antioxidant is at least one of antioxidants 1010, 168, 1076, B225, B215, B900, Hostanox P-EPQ, PW-9225B, PS802FL, and PS800; the ultraviolet absorber is at least one of benzotriazoles, benzophenones, and hindered amines; the ZSM-5 zeolite is nano-modified with cobalt tetroxide; and the lubricant is at least one of paraffin, polyethylene wax, stearic acid, and stearate.

[0015] The additive printing texture layer is composed of 70%-90% additive color development body and 10%-30% melt base material in a mass ratio;

[0016] The additive color development body is at least one of pigment toner, masterbatch and color development unit matrix; the pigment toner is at least one of carbon black, ultramarine, iron red, titanium white and iron yellow; the melt base material is at least one of polylactic acid (PLA), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), ionomer, maleic anhydride grafted polyethylene (MAPE), maleic anhydride grafted polypropylene (MAPP), ethylene-vinyl acetate copolymer (EVA) and maleic anhydride grafted EVA (EVA-MA);

[0017] The additive color development body and the molten base material are first mixed evenly in a mixer, then sampled into wire bundles by a wire making machine, and finally placed on a 3D printer for use.

[0018] In the above materials, various components of the additive printing texture layer belong to the prior art and have no effect on the separation performance between the interfaces of the materials of the present invention.

[0019] Preferably, the biomass fiber selected for the wood-plastic substrate layer is derived from at least one of wood, bamboo, hemp, cotton, rice husk, wheat straw, coconut shell, tea shell, bagasse, and peanut shell;

[0020] The plastic used in the wood-plastic substrate layer is at least one of polyethylene (PE), polypropylene (PP), polyamide (PA), polystyrene (PS), polyvinyl chloride (PVC), polycarbonate (PC), polyethylene terephthalate (PET), and polyethylene terephthalate-1,4-cyclohexanedimethanol (PETG);

[0021] The processing aid used in the wood-plastic substrate layer is prepared by mixing 7% to 42% by weight of a lubricant, 1% to 9% by weight of a heat stabilizer and an inorganic filler.

[0022] In the above materials, the purpose of processing aids is to better enable the prepared materials to be processed and shaped. Therefore, processing aids have no effect on the properties of the materials.

[0023] Preferably, the interfacial compatibilizer that is easy to precipitate is at least one of high melt index maleic anhydride grafted polyethylene (MAPE), maleic anhydride grafted polypropylene (MAPP) and ionomer, and its melt index at 190°C / 2.16kg is 10-30g / 10min; the interfacial compatibilizer that is not easy to precipitate is at least one of MAPE, MAPP, ionomer, silane coupling agent and aluminate coupling agent, among which the melt index of MAPE, MAPP and ionomer at 190°C / 2.16kg is 0.2-3.0 g / 10min.

[0024] For the interfacial compatibilizer that is easy to precipitate and the interfacial compatibilizer that is not easy to precipitate, their ingredients both contain maleic anhydride grafted polyethylene MAPE, maleic anhydride grafted polypropylene MAPP and ion polymer, but their melting indexes are different. They are the same type of substances with different melting indexes. The melting index of the interfacial compatibilizer that is easy to precipitate is large and it is easy to precipitate; the melting index of the interfacial compatibilizer that is not easy to precipitate is relatively small and it is not easy to precipitate; the interfacial compatibilizer that is not easy to precipitate in the wood-plastic matrix is ​​an interfacial compatibilizer for wood powder and plastic, and its function is to modify and enhance the interface, thereby improving the wood powder / plastic interface and enhancing the performance of wood-plastic.

[0025] Preferably, the lubricant is at least one of stearic acid, zinc stearate, calcium stearate, PE wax, and EBS; the heat stabilizer is at least one of antioxidants 1010, 168, 1076, B225, B215, B900, Hostanox P-EPQ, PW-9225B, PS802FL, and PS800; and the inorganic filler is at least one of calcium powder, magnesium powder, barium sulfate, and building aggregate powder.

[0026] Preferably, in order to improve the interlayer bonding strength between the additive printing texture layer and the wood-plastic substrate layer and the functionalized protective layer, the additive pigment toner, masterbatch and color developing unit matrix of the additive printing texture layer are volume-enhanced and modified, and the volume-enhancing and modification method is at least one of blending, grafting, etching, impregnation and surface coating modification. This technical solution belongs to the prior art.

[0027] Preferably, the thickness of the functionalized protective layer is 0.2-1.5 mm; the thickness of the additively printed texture layer is 0.1-1.2 mm.

[0028] Another object of the present invention is to provide a preparation process of a wood-plastic composite material with a 3D texture, the specific steps of which are as follows:

[0029] Step 1, extrusion of wood-plastic substrate: mixing the raw materials of the wood-plastic substrate layer according to the mass ratio, stirring them evenly, and feeding them into an extruder for extrusion to obtain the wood-plastic substrate;

[0030] Step 2: Shaping: The substrate is cooled to 80-90°C through a shaping die for shaping;

[0031] Step 3, 3D texture printing: put the additive wire bundle into the 3D printer 1-2 hours in advance, heat the surface of the substrate after primary cooling and shaping to 125-140°C with high-temperature plasma, and then perform 3D texture printing to form an additive printing texture layer and a wood-plastic base board. After printing, use an infrared heater to heat and soften the wood-plastic base board to melt the surface, and then send it to the laminating machine;

[0032] Step 4, laminating: placing the surface-molten wood-plastic composite board into the laminating equipment in sequence by using guide rollers, performing wind pressure lamination on the surface of the additive printing texture layer to form a functionalized protective layer, and then compounding the interface of the functionalized protective layer and the additive printing texture layer, and cooling and shaping;

[0033] Step 5: Finished product processing: cutting the obtained wood-plastic composite material to a fixed length and stacking.

[0034] In the preparation process of the wood-plastic-based composite material with 3D texture of the present invention, the coating equipment in the step 4 includes a U-shaped frame and two conveyors are arranged on the inner side of the U-shaped frame, and a film cutting avoidance port is formed between the two conveyors. Both sides of the U-shaped frame are provided with symmetrically arranged side guide mechanisms, and the side guide mechanisms are located above the conveyor on the rear side. The upper end of the U-shaped frame is provided with a film releasing mechanism, a traction oscillation mechanism, an adjustable hot air mechanism, a cold air mechanism and a heat sealing knife mechanism from back to front in sequence, and the heat sealing knife mechanism is located directly above the film cutting avoidance port. A cooling box, a multi-vent valve, a heating box and two high-pressure fans are arranged at the lower inner side of the U-shaped frame, wherein one of the high-pressure fans, the cooling box and the cold air mechanism are connected in pairs through air pipes to form a cold air circulation, and another high-pressure fan, the heating box, the multi-vent valve and the adjustable hot air mechanism are connected in sequence through air pipes, and another high-pressure fan is connected to the adjustable hot air mechanism through an air pipe to form a hot air circulation.

[0035] With the above structure, the staff debugged the laminating equipment, set the information parameters of the D texture, and heated the heat sealing knife mechanism;

[0036] The wood-plastic-based panels with molten surfaces are placed on the conveyor at the rear side in sequence, and the two side guide mechanisms move to position the wood-plastic-based panels. Then the conveyor at the rear side conveys the wood-plastic-based panels to the front side. The staff pulls the functionalized protective layer from the film-releasing mechanism and passes the functionalized protective layer through the traction oscillation mechanism. After the wood-plastic-based panels move to the bottom of the traction oscillation mechanism, the functionalized protective layer is covered on the front end of the wood-plastic-based panels. Then the traction oscillation mechanism is started, and the traction oscillation mechanism pulls the functionalized protective layer. The speed at which the traction oscillation mechanism pulls the functionalized protective layer is equal to the speed at which the conveyor at the rear side conveys the wood-plastic-based panels. The wood-plastic-based panels and the functionalized protective layer pass under the adjustable hot air mechanism. , the adjustable hot air mechanism moves downward, the rear bottom of the adjustable hot air mechanism contacts the functionalized protective layer, and makes the functionalized protective layer closer to the wood-plastic base board, another high-pressure fan is started, and the sucked air is sent into the heating box, heated by the heating box, and transported to the multi-vent valve, and then transported to the adjustable hot air mechanism through the multi-vent valve. The adjustable hot air mechanism preheats the functionalized protective layer to soften the functionalized protective layer, and another high-pressure fan sucks the preheated hot air away and transports it to the heating box for heating, forming a hot air cycle, and then the oscillation mechanism is pulled to oscillate the softened functionalized protective layer, so that the softened functionalized protective layer is uniformly deformed, thereby forming a uniform coating on the D texture on the wood-plastic base board, And in the amplitude motion, it forms initial adhesion with the additive printing texture layer. Another high-pressure fan is started to send the sucked air into the heating box, which is heated and transported to the multi-vent valve. It is then transported to the adjustable hot air mechanism through the multi-vent valve. The adjustable hot air mechanism uses wind pressure to composite the interface of the functionalized protective layer and the additive printing texture layer. After lamination, another high-pressure fan sucks the hot air in the adjustable hot air mechanism and transports it to the heating box. Then the adjustable hot air mechanism rolls to make the functionalized protective layer fit tightly with the additive printing texture layer, and presses the excess functionalized protective layer on the edge onto the side of the wood-plastic base board to form a wood-plastic base composite material. Then the wood-plastic base composite material enters under the cold air mechanism. The cold air mechanism moves downward, and one of the high-pressure fans sucks air and delivers it to the cooling box. After cooling in the cooling box, the air is delivered to the cold air mechanism. The cold air mechanism cools the wood-plastic composite material and shapes it. After cooling, one of the high-pressure fans sucks the air in the cold air mechanism away, and then delivers it to the cooling box to form a cold air cycle. Then the wood-plastic composite material passes under the heat sealing knife mechanism, and the heat sealing knife mechanism moves downward to heat the functional protective layer covering the front end of the wood-plastic composite material and wrap it around the front end of the wood-plastic composite material, and then continues to deliver it to the conveyor on the front side, and continues to deliver it out. Repeat the above actions to process the wood-plastic composite board entering the laminating device in turn;

[0037] When the functionalized protective layer between the ends of two adjacent wood-plastic-based composite materials passes under the heat-sealing knife mechanism, the heat-sealing knife mechanism moves downward to cut the functionalized protective layer, and continues to move downward into the film cutting avoidance opening, and the heat-sealing knife mechanism heat-seals the cut functionalized protective layer at the ends of the two wood-plastic-based composite materials at corresponding positions.

[0038] The U-shaped frame is provided with two symmetrically arranged U-shaped limit frames, and the U-shaped limit frames are located above the conveyor on the rear side. The side guide mechanism includes an electric push rod 1, which is fixed to the outer side of the U-shaped frame. The telescopic end of the electric push rod 1 is detachably provided with a guide wheel rod, which is located above the conveyor on the rear side. A plurality of guide wheels are rotatably provided on the guide wheel rod. The film releasing mechanism includes two symmetrically arranged mounting plates, which are fixed to the upper end of the U-shaped frame and are located on the rear sides of the two U-shaped limit frames. A mold releasing roll and a guide roller are rotatably provided between the two mounting plates, and the guide roller is located at the rear and lower side of the mold releasing roll. A crossbeam is fixed between the two mounting plates, and a plurality of visual cameras are provided on the lower end surface of the crossbeam.

[0039] With the above structure, the U-shaped limit frame is used to install and limit the traction oscillation mechanism, the two electric push rods and one telescopic end drive the guide wheel rods at the corresponding positions to move, the two guide wheel rods drive the guide wheels at the corresponding positions to move, the two guide wheel rods and the guide wheels at the corresponding positions move to cooperate with the limit wood-plastic base board, and the guide wheels are used to guide the wood-plastic base board;

[0040] The functionalized protective layer is pulled out from the mold release roll and enters the traction oscillation mechanism through the guide roller. Several visual cameras are used to monitor the time when the wood-plastic base board enters the conveyor on the rear side and upload the information to control the movement of the adjustable hot air mechanism and the heat sealing knife mechanism.

[0041] The traction oscillation mechanism comprises a vibration frame, a traction roller 1, a traction roller 2, two drive motors and two bearing seats. The vibration frame is slidably arranged in two U-shaped limit frames. A plurality of spring rods are arranged between the bottom ends of both sides of the vibration frame and the U-shaped limit frames at corresponding positions. A vibration motor is fixed to the upper end of the vibration frame. The traction roller 1 is located directly above the traction roller 2. There is a distance between the traction roller 1 and the traction roller 2. One of the drive motors and one of the bearing seats are movably arranged on the left and right sides of the vibration frame, and the other drive motor and the other bearing seat are fixed on the left and right sides of the vibration frame, respectively. One end of the traction roller 1 is fixed to the inner ring of one of the bearing seats, and the other end of the traction roller 1 is fixedly connected to the output shaft of one of the drive motors. One end of the traction roller 2 is fixed to the inner ring of the other bearing seat, and the other end of the traction roller 2 is fixedly connected to the output shaft of the other drive motor. The traction roller 1 and the traction roller 2 rotate in opposite directions.

[0042] With the above structure, the staff adjusts the position of one of the driving motors and one of the bearing seats according to the specifications of the functional protective layer, thereby adjusting the distance between the traction roller 1 and the traction roller 2. The staff makes the functional protective layer pass through the middle position of the traction roller 1 and the traction roller 2, and the traction roller 1 and the traction roller 2 respectively contact the upper and lower end surfaces of the functional protective layer;

[0043] After the wood-plastic-based sheet moves to the bottom of the second traction roller, the output shaft of one of the driving motors drives the traction roller one to rotate forward, and the output shaft of the other driving motor drives the traction roller two to rotate reversely, so as to pull the functionalized protective layer, and the speed of pulling the functionalized protective layer is equal to the speed of the conveyor at the rear side to transport the wood-plastic-based sheet;

[0044] After the wood-plastic base board moves to the bottom of the adjustable hot air mechanism, the vibration motor drives the vibration frame to oscillate, and the vibration frame drives the traction rollers 1 and 2 to oscillate, thereby driving the functionalized protective layer to oscillate.

[0045] The adjustable hot air mechanism comprises a support frame 1, two movable plate assemblies and a hot air box, the support frame 1 is fixed to the upper end of the U-shaped frame, a plurality of electric push rods 2 are fixed to the upper end of the support frame 1, the hot air box is fixed to the telescopic end of the plurality of electric push rods 2, a pressure roller is rotatably arranged on the outer front side of the hot air box, the outer ring of the pressure roller is made of elastic material, the outer ring of the pressure roller is lower than the lower end surface of the hot air box, the outer ring of the pressure roller is provided with two movable pressure rings, a sliding roller is rotatably arranged on the lower end of the rear side of the hot air box, an exhaust hood 1 is provided on the upper rear side of the hot air box, and the exhaust hood 1 is connected to another high pressure The air inlets of the fans are connected by air pipes, and a wind shield is arranged inside the hot air box. The height of the bottom of the wind shield is higher than the bottom of the hot air box on the front side. The wind shield is located directly below the plurality of electric push rods. The wind shield divides the inside of the hot air box into a wind pressure zone on the front side and a preheating zone on the rear side. Sliding grooves are provided at both ends of the wind shield. The movable plate assembly includes a movable plate, and a sliding plate is provided on the side of the movable plate. The sliding plates of the two movable plate assemblies are respectively slidably arranged in the corresponding sliding grooves. A toggle rod is provided on the upper end surface of the movable plate, and the toggle rod extends out of the upper end surface of the hot air box. Both sides of the upper end of the toggle rod are provided with fixing plates, and fixing screw holes are provided on the fixing plates. Fixing screws are screwed in the fixing screw holes, and the fixing screws are against the upper end surface of the hot air box. The upper end surface of the hot air box is provided with a plurality of rows of insertion ports and a plurality of rows of screw holes. The plurality of rows of insertion ports are divided into two parts and are respectively located at the front and rear sides of the wind shield plate. A high-pressure air gun assembly is detachably provided in the insertion ports. The high-pressure air gun assembly includes a fixing seat and a high-pressure air gun. The fixing seat is provided with a captive screw, and the captive screw is screwed with the screw hole to fix the fixing seat on the upper end surface of the hot air box. A pipe through hole is opened on the fixed seat, which is connected with the insertion port. A lifting block is fixed on the upper end of the fixed seat, and an electric push rod three is fixed on the lower end face of the fixed seat. The electric push rod three extends into the insertion port at the corresponding position, and an electric rotating seat is fixed on the telescopic end of the electric push rod three. A connecting seat is provided at the end of the electric rotating seat, and the high-pressure air gun is rotatably arranged on the inner side of the end of the connecting seat. The high-pressure air gun is connected to the multi-vent valve by an air pipe passing through the pipe through hole. A dual-axis micro motor is provided at the end of the high-pressure air gun, and the output shaft of the dual-axis micro motor is fixedly connected to the connecting seat.

[0046] With the above structure, the staff adjusts the positions of the two movable plate assemblies and the pressure ring and the number of high-pressure air gun assemblies according to the specifications of the functionalized protective layer. When the wood-plastic base board and the functionalized protective layer enter under the sliding roller, the telescopic ends of several electric push rods drive the hot air box to move downward, and the sliding roller contacts the functionalized protective layer and makes the functionalized protective layer close to the wood-plastic base board. Then the wood-plastic base board and the functionalized protective layer enter the preheating zone, and another high-pressure fan draws air from the exhaust hood and transports it to the heating box. After being heated in the heating box, it is transported to several high-pressure air gun assemblies through multiple vent valves and blown out through several high-pressure air gun assemblies. Several high-pressure air gun assemblies in the preheating zone blow out hot air to preheat the functionalized protective layer. The hot air is blown out from the preheating zone. It moves from the front side to the rear side, and is finally sucked away from the exhaust hood on the rear side of the upper end of the hot air box and transported to the heating box to form a hot air circulation. Several high-pressure air gun components in the wind pressure zone blow out high-pressure hot air at multiple angles according to the information uploaded by several visual cameras and 3D texture information, and dynamically adjust the height and angle of the air outlet in real time to make the interface of the functionalized protective layer and the additive printing texture layer composite, and the functionalized protective layer is heated evenly to avoid wrinkles and bubbles. The hot air after lamination enters the preheating zone from the bottom of the wind shield and is finally sucked away to reduce heat loss. After lamination, the pressure roller rolls to make the functionalized protective layer fit closely with the additive printing texture layer. While rolling, the pressure ring presses and heat-seals the excess functionalized protective layer on the edge to the side of the wood-plastic base board;

[0047] The staff adjusts the positions of the two movable plates according to the specifications of the functionalized protective layer. When adjusting the position of one of the movable plates, the two fixing screws are rotated so that the two fixing screws no longer contact the upper end surface of the hot air box. Then the staff toggles the toggle lever to make the sliding plate slide inside the sliding groove, thereby adjusting the position of the movable plate. After adjustment, the two fixing screws are rotated so that the two fixing screws contact the upper end surface of the hot air box, and the above actions are repeated to adjust the position of the other movable plate.

[0048] The staff adjusts the number of high-pressure air guns according to the specifications of the functional protective layer. When adjusting, the captive screws are turned to contact the screw connection. The staff pulls the high-pressure air gun out of the insertion port through the lifting block;

[0049] When the high-pressure air gun blows high-pressure hot air, the telescopic end of the electric push rod 3 drives the electric rotating seat and the high-pressure air gun to adjust dynamically in real time to make the blown air pressure consistent. The electric rotating seat drives the high-pressure air gun to rotate, and the output shaft of the dual-axis micro motor rotates. The reaction makes the high-pressure air gun move, thereby realizing the high-pressure air gun blowing out high-pressure hot air at multiple angles, so that the interface of the functionalized protective layer and the additive printing texture layer is compounded to avoid the generation of wrinkles and bubbles.

[0050] The cold air mechanism includes a support frame 2 and a cold air box. The support frame 2 is fixed to the upper end of the U-shaped frame. A plurality of electric push rods 4 are fixed to the upper end of the support frame 2. The cold air box is fixed to the telescopic ends of the plurality of electric push rods 4. A cold blowing pipe is provided on the inner front side of the cold air box. The cold blowing pipe is connected to the cooling box through an air pipe. An exhaust hood 2 is provided on the upper rear side of the cold air box. The exhaust hood 2 is connected to the air inlet of one of the high-pressure fans through an air pipe.

[0051] With the above structure, when the wood-plastic-based composite material passes under the cold air box, the telescopic ends of the plurality of electric push rods four drive the cold air box to move downward, so that the interval between the cold air box and the wood-plastic-based composite material is reduced, and then one of the high-pressure fans is started to suck air and transport it to the cooling box, and then transport it to the cold air box after being cooled in the cooling box to cool the wood-plastic-based composite material and shape it. After cooling, one of the high-pressure fans sucks the air in the cold air box through the exhaust hood two, and then transports it to the cooling box to form a cold air circulation.

[0052] The heat sealing knife mechanism comprises a support frame three and a heat sealing knife. The support frame three is fixed to the upper end of the U-shaped frame. A plurality of electric push rods five are fixed to the upper end of the support frame three. The heat sealing knife is fixed to the telescopic ends of the plurality of electric push rods five. A plurality of electric heating tubes are arranged inside the heat sealing knife. The heat sealing knife is located directly above the film cutting avoidance port.

[0053] With the above structure, a plurality of electric heating tubes heat the heat sealing knife. According to the information of a plurality of visual cameras, when the wood-plastic-based composite material passes under the heat sealing knife, the telescopic ends of a plurality of electric push rods 5 drive the heat sealing knife to move downward, and heat the functionalized protective layer covering the front end of the wood-plastic-based composite material and wrap it around the front end of the wood-plastic-based composite material, and then continue to transport it to the conveyor on the front side and continue to transport it out;

[0054] The heat-sealing position of the heat-sealing knife is equal to the distance between the two adjacent ends of the wood-plastic-based composite materials. When the functionalized protective layer between the two adjacent ends of the wood-plastic-based composite materials passes under the heat-sealing knife, the telescopic ends of the plurality of electric push rods five drive the heat-sealing knife to move downward, cut the functionalized protective layer, and continue to move downward into the film cutting avoidance opening. In the process of moving downward, the heat-sealing knife heat-seals the cut two parts of the functionalized protective layer at the ends of the corresponding positions of the two wood-plastic-based composite materials, and then immediately returns to the initial position, and then continues to be transported to the conveyor on the front side, and continues to be transported out.

[0055] The process flow is one-step molding process A: sequentially extruding the wood-plastic substrate, primary cooling and shaping of the substrate, printing of 3D texture on the substrate surface, lamination of the functional protective layer, cooling and shaping of the wood-plastic composite material, cutting to length, and stacking.

[0056] The above preparation process is not limited to the one-step forming process A, and the following processes can also be used:

[0057] One-step forming process B: sequentially extruding the wood-plastic substrate, primary cooling and shaping of the substrate, printing and laminating the 3D texture on the surface of the functionalized protective layer, cooling and shaping the obtained wood-plastic composite material, cutting to a fixed length, and stacking; or

[0058] Segmented molding process A: The first stage is to sequentially carry out extrusion of the wood-plastic substrate, cooling and shaping of the substrate, cutting to length, and stacking of the substrate; the second stage is to sequentially carry out 3D texture printing on the substrate surface or 3D texture printing on the functionalized protective layer surface, laminating, cooling and shaping of the wood-plastic composite material, and stacking; or

[0059] Segmented molding process B: The first stage is to carry out the extrusion of wood-plastic substrate, primary cooling and shaping of the substrate, 3D texture printing on the substrate surface, cooling and shaping of the wood-plastic substrate with 3D texture, fixed-length cutting, and substrate stacking; the second stage is to carry out the functional protective layer lamination, cooling and shaping of the wood-plastic composite material, and stacking.

[0060] The 3D textured wood-plastic-based composite material of the present invention can also be obtained by adopting the above-mentioned preparation process.

[0061] 1. The 3D textured wood-plastic-based composite material of the present invention has a stable structure and multifunctionality, and can meet diversified usage requirements.

[0062] 2. The composite material preparation process of the present invention has low energy consumption, good pressing effect and high preparation efficiency.

[0063] 3. The coating equipment used in the preparation process of the present invention can sequentially perform the following tasks: positioning and conveying, synchronous film release, film relaxation and vibration, hot air circulation preheating of the film, multi-angle stable wind pressure coating, cold air circulation cooling of materials, film cutting and heat sealing, etc. The problem of coating the surface of the 3D texture layer is solved by relaxation and vibration and wind pressure coating, and the problem of whitening marks on the convex points of the 3D texture due to excessive local tensile deformation when the surface film is coated is also solved.

[0064] 4. The present invention cooperates with the conveyor on the rear side and the two side guide mechanisms to stably convey and position the wood-plastic base board, which is convenient for film coating. The film placing mechanism cooperates with the traction and oscillation mechanism to traction the functionalized protective layer, so that the functionalized protective layer and the wood-plastic base board move synchronously, reducing the stretching of the functionalized protective layer, facilitating film coating, and oscillating the softened functionalized protective layer by the traction and oscillation mechanism to make the softened functionalized protective layer deform evenly, reducing the white marks of film coating, and improving the film coating quality.

[0065] 5. The present invention cooperates with another high-pressure blower, a heating box and a multi-vent valve through an adjustable hot air mechanism to form a hot air circulation, reduce heat loss, uniformly preheat the functionalized protective layer, soften the functionalized protective layer, and achieve a better coating effect. The height and angle of the air outlet can be dynamically adjusted in real time through the adjustable hot air mechanism to maintain consistent wind pressure, stabilize the pressing, avoid bubbles and wrinkles, and make the finished product more stable.

[0066] 6. The present invention uses a cold air mechanism in conjunction with one of the high-pressure blowers and a cooling box to cool and shape the wood-plastic composite material, and forms a cold air cycle, thereby reducing energy loss and reducing costs. The heat sealing knife mechanism and two conveyors cooperate to cut the functionalized protective layer and enter the film cutting avoidance port, and heat-seal the cut two parts of the functionalized protective layer at the ends of the corresponding positions of the two wood-plastic composite materials, thereby preventing the functionalized protective layer from peeling off from the ends of the wood-plastic composite material and ensuring the quality of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 Product appearance drawing of 3D textured wood-plastic composite material;

[0068] Figure 2 The structural diagram of the 3D textured wood-plastic composite material;

[0069] Figure 3 This is a table of interface bonding stability test results of Examples 1-8 and Comparative Examples 1-2 of the present invention;

[0070] Figure 4 The present invention is a process flow chart for preparing the 3D textured wood-plastic-based composite material.

[0071] Figure 5 It is a three-dimensional structural schematic diagram of the coating device in the present invention

[0072] Figure 6 It is a rear structural schematic diagram of the laminating device in the present invention.

[0073] Figure 7 It is a three-dimensional structural schematic diagram of the conveyor, film placing mechanism and side guide mechanism in the present invention.

[0074] Figure 8 It is a three-dimensional structural schematic diagram of the adjustable hot air mechanism in the present invention when viewed from above.

[0075] Fig. 9 It is a schematic diagram of the three-dimensional structure of the adjustable hot air mechanism in the present invention when viewed from above.

[0076] Fig.10 It is a three-dimensional structural schematic diagram of the high-pressure air gun assembly in the present invention.

[0077] Fig.11It is a three-dimensional structural schematic diagram of the movable plate assembly in the present invention.

[0078] Fig.12 It is a three-dimensional structural schematic diagram of the cooling air mechanism in the present invention.

[0079] Fig.13 It is a three-dimensional structural schematic diagram of the heat sealing knife mechanism in the present invention.

[0080] Fig.14 It is a three-dimensional structural schematic diagram of the traction oscillation mechanism in the present invention.

[0081] In the figure, A, functional protective layer; B, additive printing texture layer; C, wood-plastic substrate layer; 1, conveyor; 2, heat sealing knife mechanism; 3, cold air mechanism; 4, film release mechanism; 5, traction oscillation mechanism; 6, adjustable hot air mechanism; 7, cooling box; 8, multi-vent valve; 9, heating box; 10, high-pressure fan; 11, U-shaped limit frame; 12, mounting plate; 13, crossbeam; 14, electric push rod 1; 15, guide wheel rod; 16, electric push rod 2; 17, high-pressure air gun assembly; 18, support frame 1; 19, movable plate assembly; 20, exhaust hood 1; 21, insertion port; 22, tightening screw; 23, hot air box; 24, wind shield ; 25. Fixed seat; 26. Electric push rod three; 27. High-pressure air gun; 28. Electric rotating seat; 29. ​​Pipe through hole; 30. Pulling block; 31. Sliding plate; 32. Tightening plate 2; 33. Toggle rod; 34. Cold air box; 35. Cold blowing pipe; 36. Exhaust hood two; 37. Heat sealing knife; 38. Electric heating tube; 39. Pulling roller one; 40. Vibrating frame; 41. Vibrating motor; 42. Bearing seat; 43. Driving motor; 44. Mold roll; 45. Pulling roller two; 46. Support frame two; 47. Electric push rod four; 48. Electric push rod five; 49. Support frame three; 50. Movable plate; 51. Pressing ring; 52. Pressing roller. DETAILED DESCRIPTION

[0082] The present invention is further described in detail below in conjunction with implementation examples, but the implementation methods of the present invention are not limited thereto.

[0083] Comparative Example 1

[0084] The prepared wood-plastic composite material with 3D texture has the following dimensions: Figure 1 and Figure 2 As shown, the thickness of the functionalized protective layer is 0.8 mm, the average thickness of the additively printed texture layer is about 0.3 mm, and the wood-plastic substrate layer is a 120 mm × 10 mm (width × thickness) rectangular material.

[0085] Among them, the functionalized protective layer uses unmodified pure HDPE, model number is Hostalen ACP 6031D;

[0086] The additive printing texture layer contains 85% toner by weight and 15% sodium ion polymer Surlyn 1601 by weight, showing a black walnut-like texture.

[0087] In the wood-plastic substrate layer, 5000S model HDPE accounts for 25% by mass, poplar wood powder accounts for 60% by mass, MAPE with a melt index of 0.65 g / 10min at 190℃ / 2.16kg accounts for 6% by mass, carbon black accounts for 1% by mass, and processing aids account for 8% by mass; in the processing aid system, calcium powder accounts for 80% by mass, PE wax accounts for 15% by mass, and antioxidant 1010 accounts for 5% by mass.

[0088] Example 1

[0089] Functionalized protective layer, in which Hostalen ACP 6031D model HDPE plastic accounts for 80% by weight, and sodium ion polymer Surlyn 1601 accounts for 20% by weight.

[0090] The rest are consistent with Comparative Example 1.

[0091] Example 2

[0092] In the functionalized protective layer, Hostalen ACP 6031D HDPE plastic accounts for 88% by weight, and zinc ion polymer Surlyn 9721 accounts for 12% by weight.

[0093] The rest are consistent with Comparative Example 1.

[0094] Example 3

[0095] In the functionalized protective layer, Hostalen ACP 6031D HDPE plastic accounts for 80% by weight, and sodium ion polymer Surlyn 1601 accounts for 20% by weight.

[0096] The additive printing texture layer consists of 85% toner and 15% HDPE plastic.

[0097] The rest are consistent with Comparative Example 1.

[0098] Example 4

[0099] In the functionalized protective layer, Hostalen ACP 6031D HDPE plastic accounts for 80% by weight, and sodium ion polymer Surlyn 1601 accounts for 20% by weight.

[0100] In the additive printing texture layer, the toner accounts for 60% by weight, and the sodium ion polymer Surlyn 1601 accounts for 40% by weight.

[0101] The rest are consistent with Comparative Example 1.

[0102] Example 5

[0103] In the functionalized protective layer, Hostalen ACP 6031D HDPE plastic accounts for 80% by weight, and sodium ion polymer Surlyn 1601 accounts for 20% by weight.

[0104] The toner mass accounts for 95% of the additive printing texture layer, and the sodium ion polymer Surlyn 1601 mass accounts for 5%.

[0105] The rest are consistent with Comparative Example 1.

[0106] Example 6

[0107] In the functionalized protective layer, Hostalen ACP 6031D HDPE plastic accounts for 80% by weight, and sodium ion polymer Surlyn 1601 accounts for 20% by weight.

[0108] The mass proportion of MAPE with a melt index of 0.65 g / 10min at 190℃ / 2.16kg in the wood-plastic substrate layer decreased to 4%, and the mass proportion of MAPE with a melt index of 12 g / 10min at 190℃ / 2.16kg increased by 2%.

[0109] The rest are consistent with Comparative Example 1.

[0110] Example 7

[0111] In the functionalized protective layer, Hostalen ACP 6031D HDPE plastic accounts for 80% by weight, and sodium ion polymer Surlyn 1601 accounts for 20% by weight.

[0112] The mass proportion of MAPE with a melt index of 0.65 g / 10min at 190℃ / 2.16kg in the wood-plastic substrate layer decreased to 2%, and the mass proportion of MAPE with a melt index of 12 g / 10min at 190℃ / 2.16kg increased by 4%.

[0113] The rest are consistent with Comparative Example 1.

[0114] Comparative Example 2

[0115] In the functionalized protective layer, T30 PP plastic accounts for 70% by mass, lithium sodium ion polymer Surlyn 7940 accounts for 12% by mass, nano titanium dioxide accounts for 5% by mass, I08DT-A01 styrene-ethylene-propylene-styrene block copolymer elastomer accounts for 8% by mass, Tinuvin326 UV absorber accounts for 1% by mass, PE wax accounts for 0.5% by mass, antioxidant 1010 accounts for 0.5% by mass, and ZSM-5 zeolite accounts for 3% by mass.

[0116] The mass of the solid color rendering unit in the additive printing texture layer accounts for 85%, and the mass of MAPP with a melt index of 0.35 g / 10min at 190℃ / 2.16kg accounts for 15%, showing the characteristic texture of teak.

[0117] In the wood-plastic substrate layer, the mass of T30 model PP plastic accounts for 20%, the mass of bamboo powder accounts for 55%, the mass of MAPP with a melt index of 0.35 g / 10min at 190℃ / 2.16kg accounts for 6%, the mass of MAPP with a melt index of 20 g / 10min at 190℃ / 2.16kg accounts for 5%, the mass of iron red accounts for 2%, and the mass of processing aids accounts for 12%; in the processing aid system, the mass of calcium powder accounts for 70%, the mass of stearic acid accounts for 25%, and the mass of antioxidant 1010 accounts for 5%.

[0118] Example 8

[0119] In the wood-plastic substrate layer, MAPP with a melt index of 20 g / 10 min at 190° C. / 2.16 kg was replaced with MAPP with a melt index of 45 g / 10 min at 190° C. / 2.16 kg, and the rest was consistent with Comparative Example 2.

[0120] Performance Testing

[0121] To better illustrate the present invention, the performance of the wood-plastic composite material obtained in each embodiment is tested below, and the interface bonding stability of the product is tested using the standard test method in the industry, and a comparison is made with a comparative example.

[0122] Interface bonding stability test: refer to GB / T 17657 to conduct a 100℃ boiling test on the wood-plastic composite material with 3D texture. The specific test method is as follows:

[0123] (1) Cut five 100 mm samples along the length direction of the co-extruded composite material, soak them in 100 °C hot water for 4 h, take out the samples and cool them in deionized water at 25 ± 2 °C for 15 min;

[0124] (2) The sample was then placed in an oven at 63°C and dried for 20 h. After one cycle, the interface peeling between the functionalized protective layer / additive printing texture layer and the additive printing texture layer / wood-plastic substrate layer was observed.

[0125] (3) Repeat the experiment until peeling and cracking occur at the interface of the functionalized protective layer / additive printing texture layer and the additive printing texture layer / wood-plastic substrate layer, and record the number of cycle tests experienced when the interface of the functionalized protective layer / additive printing texture layer and the additive printing texture layer / wood-plastic substrate layer peels off.

[0126] In the above embodiments, in Example 4, due to the excessive melt fluidity of the additive printing texture layer, the 3D texture printed on the substrate collapsed, and thus the wood-plastic composite material with 3D texture could not be prepared; in Example 5, due to the excessive filling of the toner, the melt-based substrate could not form a continuous phase line, and thus the additive line bundle could not be prepared. The interface bonding stability test results of other different embodiments and comparative examples are shown in FIG. Figure 3 shown.

[0127] Figure 3 Interface A represents the interface of the functionalized protective layer / additively printed texture layer, interface B represents the interface of the additively printed texture layer / wood-plastic substrate layer, and the numerical results represent the number of water boiling cycle tests experienced during interface peeling.

[0128] From the comparison of the boiling cycle test results of the above comparative example and the embodiment, it can be seen that:

[0129] (1) From the test results of the functionalized protective layer / additive printing texture layer interface bonding stability of Example 1, Example 2 and Comparative Example 1, it can be seen that the addition of an interface compatibilizer to the functionalized protective layer can greatly improve the interface bonding performance of the functionalized protective layer / additive printing texture layer, and the interface bonding stability increases with the increase in the mass proportion of the interface compatibilizer in the functionalized protective layer, indicating that the interface compatibilizer can improve the initial adhesion of the functionalized protective layer, and the initial adhesion is crucial to the interface bonding stability of the coating products.

[0130] (2) From the test results of the functionalized protective layer / additive printing texture layer interface bonding stability of Example 1, Example 3 and Comparative Example 1, it can be seen that when the additive printing texture layer uses a molten base material with an interface compatibilizer effect, the functionalized protective layer / additive printing texture layer interface bonding stability can be improved to a certain extent, but the improvement effect is not very obvious.

[0131] (3) From the test results of the additive printing texture layer / wood-plastic substrate layer interface bonding stability of Example 6, Example 7 and Comparative Example 1, it can be seen that the easily precipitated interface compatibilizer in the wood-plastic substrate layer is attached to the wood-plastic surface, which can greatly improve the interface bonding performance of the additive printing texture layer / wood-plastic substrate layer, and the interface bonding stability increases with the increase of the mass proportion of the easily precipitated interface compatibilizer, indicating that compared with the functionalized protective layer, the additive printing texture layer is more difficult to form an effective interface bonding with the conventional wood-plastic substrate.

[0132] (4) From the test results of the interface bonding stability of the functionalized protective layer / additive printing texture layer and the additive printing texture layer / wood plastic substrate layer of Example 1, Example 2, Example 3, Example 6, Example 7, Comparative Example 1, and Comparative Example 2, it can be seen that the various functionalized modified components added to the functionalized surface layer will not reduce the interface bonding stability of the wood plastic-based composite material with a 3D texture. On the contrary, since the modified components improve the physical and chemical properties of the functionalized protective layer, the wood plastic-based composite material with a 3D texture has a better structural stability, and the interface bonding performance of the functionalized protective layer / additive printing texture layer and the additive printing texture layer / wood plastic substrate layer is improved at the same time.

[0133] (5) From the test results of the interface bonding stability of Example 8 and Comparative Example 2, it can be seen that the interface compatibilizer with small molecular weight, low melt strength and excessive melt index attached to the wood-plastic surface will reduce the interface bonding performance of the additive printing texture layer / wood-plastic substrate layer, thereby reducing the overall structural stability of the wood-plastic composite material with a 3D texture.

[0134] In order to solve the printing problem of the wood-plastic material of the present invention, the present invention also provides a preparation process of a wood-plastic-based composite material with a 3D texture:

[0135] Step 1: Extrusion of wood-plastic substrate: Mix the raw materials of the wood-plastic substrate layer in proportion by mass, stir them evenly, and feed them into an extruder for extrusion to obtain the wood-plastic substrate;

[0136] Step 2: Shaping: The substrate is cooled to 80-90°C through a shaping die for primary shaping;

[0137] Step 3, 3D texture printing: put the additive wire bundle into the 3D printer 1-2 hours in advance, heat the surface of the substrate after primary cooling and shaping to 125-140°C with high-temperature plasma, and then perform 3D texture printing to form an additive printing texture layer and a wood-plastic base board. After printing, use an infrared heater to heat and soften the wood-plastic base board to melt the surface, and then send it to the laminating machine;

[0138] Step 4, laminating: placing the surface-molten wood-plastic composite board into the laminating equipment in sequence by using guide rollers, performing wind pressure lamination on the surface of the additive printing texture layer to form a functionalized protective layer, and then compounding the interface of the functionalized protective layer and the additive printing texture layer, and cooling and shaping;

[0139] Step 5: Finished product processing: cutting the obtained wood-plastic composite material to a fixed length and stacking.

[0140] In the above-mentioned step 4, the laminating equipment includes a U-shaped frame, two conveyors 1 are arranged on the inner side of the U-shaped frame, and a film cutting avoidance port is formed between the two conveyors 1. Symmetrically arranged side guide mechanisms are arranged on both sides of the U-shaped frame, and the side guide mechanisms are located above the conveyor 1 on the rear side. A film placing mechanism 4, a traction oscillation mechanism 5, an adjustable hot air mechanism 6, a cold air mechanism 3 and a heat sealing knife mechanism 2 are arranged on the upper end of the U-shaped frame from back to front, and the heat sealing knife mechanism 2 is located directly above the film cutting avoidance port. A cooling box 7, a multi-vent valve 8, a heating box 9 and two high-pressure fans 10 are arranged on the lower inner side of the U-shaped frame, wherein one of the high-pressure fans 10, the cooling box 7 and the cold air mechanism 3 are connected in pairs through air pipes to form a cold air circulation, and another high-pressure fan 10, the heating box 9, the multi-vent valve 8 and the adjustable hot air mechanism 6 are connected in sequence through air pipes, and another high-pressure fan 10 is connected to the adjustable hot air mechanism 6 through an air pipe to form a hot air circulation.

[0141] The staff debugs the laminating equipment, sets the information parameters of the 3D texture, and heats the heat sealing knife mechanism 2; the wood-plastic-based board with molten surface is placed on the conveyor 1 at the rear side in turn, and the two side guide mechanisms move to position the wood-plastic-based board. Then the conveyor 1 at the rear side conveys the wood-plastic-based board to the front side. The staff pulls the functionalized protective layer from the film placing mechanism 4, and passes the functionalized protective layer through the traction oscillation mechanism 5. After the wood-plastic-based board moves to the bottom of the traction oscillation mechanism 5, the functionalized protective layer is covered on the front end of the wood-plastic-based board. Then the traction oscillation mechanism 5 is started, and the traction oscillation mechanism 5 pulls the functionalized protective layer. The speed at which the traction oscillation mechanism 5 pulls the functionalized protective layer is equal to the speed at which the conveyor 1 at the rear side conveys the wood-plastic-based board. , the wood-plastic base board and the functionalized protective layer pass under the adjustable hot air mechanism 6, the adjustable hot air mechanism 6 moves downward, the rear bottom of the adjustable hot air mechanism 6 contacts the functionalized protective layer, and makes the functionalized protective layer closer to the wood-plastic base board, another high-pressure fan 10 is started, and the sucked air is sent to the heating box 9, heated by the heating box 9, and transported to the multi-vent valve 8, and then transported to the adjustable hot air mechanism 6 through the multi-vent valve 8. The adjustable hot air mechanism 6 preheats the functionalized protective layer to soften the functionalized protective layer, and another high-pressure fan 10 sucks the preheated hot air away and transports it to the heating box 9 for heating, forming a hot air cycle, and then the oscillation mechanism 5 is pulled to oscillate the softened functionalized protective layer, so that the softened functionalized protective layer is uniformly deformed, thereby softening the wood The 3D texture on the plastic-based board is evenly coated and initially adheres to the additively printed texture layer during the amplitude motion. Another high-pressure fan 10 is started to send the sucked air into the heating box 9, which is heated by the heating box 9 and transported to the multi-vent valve 8. The multi-vent valve 8 is then transported to the adjustable hot air mechanism 6. The adjustable hot air mechanism 6 uses wind pressure to composite the interface of the functionalized protective layer and the additively printed texture layer. After lamination, another high-pressure fan 10 sucks the hot air in the adjustable hot air mechanism 6 and transports it to the heating box 9. Then the adjustable hot air mechanism 6 is rolled to make the functionalized protective layer fit tightly with the additively printed texture layer, and the excess functionalized protective layer on the edge is pressed onto the side of the wood-plastic-based board to form a wood-plastic-based composite material. Then the wood-plastic-based composite material is subjected to The wood-plastic composite material enters the bottom of the cold air mechanism 3, and the cold air mechanism 3 moves downward. One of the high-pressure fans 10 sucks air and transports it to the cooling box 7. After cooling in the cooling box 7, it is transported to the cold air mechanism 3. The cold air mechanism 3 cools the wood-plastic composite material and shapes it. After cooling, one of the high-pressure fans 10 sucks the air in the cold air mechanism 3 away, and then transports it to the cooling box 7 to form a cold air cycle. Then the wood-plastic composite material passes under the heat sealing knife mechanism 2, and the heat sealing knife mechanism 2 moves downward to heat the functionalized protective layer covering the front end of the wood-plastic composite material and wrap it on the front end of the wood-plastic composite material, and then continues to transport it to the conveyor 1 on the front side, and continues to transport it out. Repeat the above actions to process the wood-plastic composite material entering the laminating device in turn;

[0142] When the functionalized protective layer between the ends of two adjacent wood-plastic-based composite materials passes under the heat-sealing knife mechanism 2, the heat-sealing knife mechanism 2 moves downward to cut the functionalized protective layer, and continues to move downward into the film cutting avoidance opening, and the heat-sealing knife mechanism 2 heat-seals the cut functionalized protective layer at the ends of the two wood-plastic-based composite materials at corresponding positions.

[0143] The U-shaped frame is provided with two symmetrically arranged U-shaped limit frames 11, which are located above the conveyor 1 on the rear side. The side guide mechanism includes an electric push rod 14, which is fixed to the outer side of the U-shaped frame. The telescopic end of the electric push rod 14 is detachably provided with a guide wheel rod 15, which is located above the conveyor 1 on the rear side. A number of guide wheels are rotatably provided on the guide wheel rod 15. The film placing mechanism 4 includes two symmetrically arranged mounting plates 12, which are fixed to the upper end of the U-shaped frame and are located on the rear side of the two U-shaped limit frames 11. A mold placing roll 44 and a guide roller are rotatably provided between the two mounting plates 12, and the guide roller is located at the rear and lower side of the mold placing roll 44. A crossbeam 13 is fixed between the two mounting plates 12, and a number of visual cameras are provided on the lower end surface of the crossbeam 13.

[0144] The U-shaped limiting frame 11 is used to install and limit the traction oscillation mechanism 5, and the telescopic ends of the two electric push rods 14 drive the guide wheel rods 15 at the corresponding positions to move, and the two guide wheel rods 15 drive the corresponding positions of the guide wheels to move, and the two guide wheel rods 15 and the corresponding positions of the guide wheels move to cooperate with the limiting wood-plastic base board, and the guide wheels are used to guide the wood-plastic base board;

[0145] The functionalized protective layer is pulled out from the mold release roll 44 and enters the traction oscillation mechanism 5 through the guide roller. Several visual cameras are used to monitor the time when the wood-plastic base board enters the conveyor 1 at the rear side and upload the information to facilitate the control of the movement of the adjustable hot air mechanism 6 and the heat sealing knife mechanism 2.

[0146] The traction oscillation mechanism 5 includes a vibration frame 40, a traction roller 1 39, a traction roller 2 45, two drive motors 43 and two bearing seats 42. The vibration frame 40 is slidably arranged in two U-shaped limit frames 11. A plurality of spring rods are arranged between the bottom ends of both sides of the vibration frame 40 and the corresponding U-shaped limit frames 11. A vibration motor 41 is fixed to the upper end of the vibration frame 40. The traction roller 1 39 is located directly above the traction roller 2 45. There is a distance between the traction roller 1 39 and the traction roller 2 45. One of the drive motors 43 and one of the bearing seats 42 are respectively It is movably arranged on the left and right sides of the vibration frame 40, another driving motor 43 and another bearing seat 42 are respectively fixed on the left and right sides of the vibration frame 40, one end of the traction roller 39 is fixed to the inner ring of one of the bearing seats 42, and the other end of the traction roller 39 is fixedly connected to the output shaft of one of the driving motors 43, one end of the traction roller 2 45 is fixed to the inner ring of the other bearing seat 42, and the other end of the traction roller 2 45 is fixedly connected to the output shaft of the other driving motor 43, and the traction roller 1 39 and the traction roller 2 45 rotate in opposite directions.

[0147] The staff adjusts the position of one of the driving motors 43 and one of the bearing seats 42 according to the specifications of the functionalized protective layer, thereby adjusting the distance between the traction roller 1 39 and the traction roller 2 45. The staff makes the functionalized protective layer pass through the middle position of the traction roller 1 39 and the traction roller 2 45, and the traction roller 1 39 and the traction roller 2 45 respectively contact the upper and lower end surfaces of the functionalized protective layer;

[0148] After the wood-plastic-based sheet moves to the bottom of the traction roller 45, the output shaft of one of the driving motors 43 drives the traction roller 39 to rotate forward, and the output shaft of the other driving motor 43 drives the traction roller 45 to rotate reversely, so as to pull the functionalized protective layer, and the speed of pulling the functionalized protective layer is equal to the speed of the conveyor 1 at the rear side to transport the wood-plastic-based sheet;

[0149] After the wood-plastic base plate moves to the bottom of the adjustable hot air mechanism 6, the vibration motor 41 drives the vibration frame 40 to oscillate, and the vibration frame 40 drives the traction roller 1 39 and the traction roller 2 45 to oscillate, thereby driving the functionalized protective layer to oscillate.

[0150] The adjustable hot air mechanism 6 includes a support frame 18, two movable plate assemblies 19 and a hot air box 23. The support frame 18 is fixed to the upper end of the U-shaped frame. A plurality of electric push rods 16 are fixed to the upper end of the support frame 18. The hot air box 23 is fixed to the telescopic ends of the plurality of electric push rods 16. A pressure roller 52 is rotatably provided on the front side of the outside of the hot air box 23. The outer ring of the pressure roller 52 is made of elastic material. The outer ring of the pressure roller 52 is lower than the lower end surface of the hot air box 23. The outer ring of the pressure roller 52 is provided with two movable pressure rings 51. A sliding roller is rotatably provided on the lower end of the rear side of the hot air box 23. An exhaust hood 20 is provided on the upper rear side of the hot air box 23. The exhaust hood 20 and another high-pressure air The air inlets of the machine 10 are connected by air pipes, and a wind shield 24 is provided inside the hot air box 23. The height of the bottom of the wind shield 24 is higher than the bottom of the front hot air box 23. The wind shield 24 is located directly below the plurality of electric push rods 16. The wind shield 24 divides the inside of the hot air box 23 into a wind pressure zone located at the front side and a preheating zone located at the rear side. Sliding grooves are provided at both ends of the wind shield 24. The movable plate assembly 19 includes a movable plate 50. A sliding plate 31 is provided on the side of the movable plate 50. The sliding plates 31 of the two movable plate assemblies 19 are respectively slidably arranged in the corresponding sliding grooves. A toggle rod 33 is provided on the upper end surface of the movable plate 50. The toggle rod 33 extends out of the upper end of the hot air box 23. The upper end of the toggle rod 33 is provided with a fixing plate 32 on both sides, and the fixing plate 32 is provided with a fixing screw hole, and the fixing screw 22 is screwed in the fixing screw hole, and the fixing screw 22 is against the upper end surface of the hot air box 23. The upper end surface of the hot air box 23 is provided with a plurality of rows of insertion ports 21 and a plurality of rows of screw holes. The plurality of rows of insertion ports 21 are divided into two parts and are respectively located at the front and rear sides of the wind shield plate 24. The insertion ports 21 are detachably provided with a high-pressure air gun assembly 17, and the high-pressure air gun assembly 17 includes a fixing seat 25 and a high-pressure air gun 27. The fixing seat 25 is provided with a captive screw, and the captive screw is screwed with the screw hole to fix the fixing seat 25 on the upper end surface of the hot air box 23 A pipe through hole 29 is opened on the fixed seat 25, and the pipe through hole 29 is connected with the insertion port 21. A lifting block 30 is fixed to the upper end of the fixed seat 25, and an electric push rod 3 26 is fixed to the lower end surface of the fixed seat 25. The electric push rod 3 26 extends into the insertion port 21 at the corresponding position, and an electric rotating seat 28 is fixed to the telescopic end of the electric push rod 3 26. A connecting seat is provided at the end of the electric rotating seat 28, and a high-pressure air gun 27 is rotatably arranged on the inner side of the end of the connecting seat. The high-pressure air gun 27 is connected to the multi-vent valve 8 through an air pipe passing through the pipe through hole 29. A double-axis micro motor is provided at the end of the high-pressure air gun 27, and the output shaft of the double-axis micro motor is fixedly connected to the connecting seat.

[0151] The staff adjusts the positions of the two movable plate assemblies 19 and the pressure ring 51 and the number of high-pressure air gun assemblies 17 according to the specifications of the functionalized protective layer. When the wood-plastic base board and the functionalized protective layer enter under the sliding roller, the telescopic ends of the several electric push rods 16 drive the hot air box 23 to move downward, and the sliding roller contacts the functionalized protective layer and makes the functionalized protective layer close to the wood-plastic base board. Then the wood-plastic base board and the functionalized protective layer enter the preheating zone, and another high-pressure fan 10 draws air from the exhaust hood 20 and transports it to the heating box 9. After being heated in the heating box 9, it is transported to the several high-pressure air gun assemblies 17 through the multi-vent valve 8 and blown out through the several high-pressure air gun assemblies 17. The several high-pressure air gun assemblies 17 in the preheating zone blow out hot air to preheat the functionalized protective layer. The hot air is blown out from the preheating zone. The hot air moves from the front side of the zone to the rear side, and is finally sucked away from the exhaust hood 20 on the rear side of the upper end of the hot air box 23, and transported to the heating box 9 to form a hot air circulation. The high-pressure air gun components 17 in the wind pressure zone blow out high-pressure hot air at multiple angles according to the information uploaded by the visual cameras and the 3D texture information, and dynamically adjust the height and angle of the air outlet in real time to make the interface of the functionalized protective layer and the additive printing texture layer composite, and the functionalized protective layer is heated evenly to avoid wrinkles and bubbles. The hot air after lamination enters the preheating zone from the bottom of the wind shield 24 and is finally sucked away to reduce heat loss. After lamination, the pressing roller 52 rolls to make the functionalized protective layer fit closely with the additive printing texture layer. While rolling, the pressing ring 51 presses and heat-seals the excess functionalized protective layer on the edge to the side of the wood-plastic base board;

[0152] The staff adjusts the positions of the two movable plates 50 according to the specifications of the functionalized protective layer. When adjusting the position of one of the movable plates 50, the two fixing screws 22 are rotated so that the two fixing screws 22 no longer contact the upper end surface of the hot air box 23. Then the staff toggles the toggle rod 33 to make the sliding plate 31 slide inside the sliding groove, thereby adjusting the position of the movable plate 50. After the adjustment, the two fixing screws 22 are rotated so that the two fixing screws 22 contact the upper end surface of the hot air box 23. Repeat the above actions to adjust the position of the other movable plate 50.

[0153] The staff adjusts the number of high-pressure air guns 27 according to the specifications of the functionalized protective layer. When adjusting, the captive screws are turned to contact the screw connection. The staff pulls the high-pressure air gun 27 out of the insertion port 21 by means of the lifting block 30.

[0154] When the high-pressure air gun 27 blows high-pressure hot air, the telescopic end of the electric push rod 3 26 drives the electric rotating seat 28 and the high-pressure air gun 27 to adjust dynamically in real time to make the blown air pressure consistent. The electric rotating seat 28 drives the high-pressure air gun 27 to rotate, and the output shaft of the dual-axis micro motor rotates. The reaction makes the high-pressure air gun 27 move, thereby realizing that the high-pressure air gun 27 blows out high-pressure hot air at multiple angles, so that the interface of the functionalized protective layer and the additive printing texture layer is compounded to avoid the generation of wrinkles and bubbles.

[0155] The cold air mechanism 3 includes a support frame 46 and a cold air box 34. The support frame 46 is fixed to the upper end of the U-shaped frame. A plurality of electric push rods 47 are fixed to the upper end of the support frame 46. The cold air box 34 is fixed to the telescopic ends of the plurality of electric push rods 47. A cold blowing pipe 35 is provided on the front inner side of the cold air box 34. The cold blowing pipe 35 is connected to the cooling box 7 through an air pipe. An exhaust hood 36 is provided on the rear upper end of the cold air box 34. The exhaust hood 36 is connected to the air inlet of one of the high-pressure fans 10 through an air pipe.

[0156] When the wood-plastic-based composite material passes under the cold air box 34, the telescopic ends of the four electric push rods 47 drive the cold air box 34 to move downward, so that the interval between the cold air box 34 and the wood-plastic-based composite material is reduced, and then one of the high-pressure fans 10 is started to suck air and transport it to the cooling box 7. After the cooling box 7 cools down the air, it is transported to the cold air box 34 to cool the wood-plastic-based composite material and shape it. After cooling, one of the high-pressure fans 10 sucks the air in the cold air box 34 through the exhaust hood 2 36, and then transports it to the cooling box 7 to form a cold air circulation.

[0157] The heat sealing knife mechanism 2 includes a support frame 3 49 and a heat sealing knife 37. The support frame 3 49 is fixed to the upper end of the U-shaped frame. A plurality of electric push rods 5 48 are fixed to the upper end of the support frame 3 49. The heat sealing knife 37 is fixed to the telescopic ends of the plurality of electric push rods 5 48. A plurality of electric heating tubes 38 are arranged inside the heat sealing knife 37. The heat sealing knife 37 is located directly above the film cutting avoidance port.

[0158] The plurality of electric heating tubes 38 heat the heat sealing knife 37. According to the information from the plurality of visual cameras, when the wood-plastic-based composite material passes under the heat sealing knife 37, the telescopic ends of the plurality of electric push rods 5 48 drive the heat sealing knife 37 to move downward, heating the functionalized protective layer covering the front end of the wood-plastic-based composite material and wrapping it around the front end of the wood-plastic-based composite material, and then continuing to transport it to the conveyor 1 at the front side and continuing to transport it out;

[0159] The heat-sealing position of the heat-sealing knife 37 is equal to the distance between the two adjacent ends of the wood-plastic-based composite materials. When the functionalized protective layer between the two adjacent ends of the wood-plastic-based composite materials passes under the heat-sealing knife 37, the telescopic ends of the plurality of electric push rods 5 48 drive the heat-sealing knife 37 to move downward, cut the functionalized protective layer, and continue to move downward into the film cutting avoidance port. In the process of downward movement, the heat-sealing knife 37 heat-seals the cut two parts of the functionalized protective layer at the ends of the corresponding positions of the two wood-plastic-based composite materials, and then immediately returns to the initial position, and then continues to be transported to the conveyor 1 on the front side, and continues to be transported out.

[0160] The working principle of the above-mentioned laminating equipment is as follows:

[0161] The wood-plastic composite panels with molten surfaces are placed into the laminating equipment in sequence. The staff adjusts one of the driving motors 43, one of the bearing seats 42, the positions of the two movable plates 50, the pressure rings 51 and the number of high-pressure air guns 27 according to the specifications of the functional protective layer, sets the information parameters of the 3D texture, and heats the heat sealing knife mechanism 2.

[0162] The wood-plastic-based panels with molten surfaces are placed on the rear conveyor 1 in sequence. Several visual cameras monitor the time when the wood-plastic-based panels enter the rear conveyor 1 and upload the information. The two side guide mechanisms move to position the wood-plastic-based panels. Then the rear conveyor 1 conveys the wood-plastic-based panels to the front. The staff pulls the functionalized protective layer out of the film-releasing mechanism 4, that is, pulls the functionalized protective layer out of the mold-releasing roll 44, guides it through the guide roller, and passes through the middle position of the traction roller 1 39 and the traction roller 2 45. After the wood-plastic base plate moves to the bottom of the traction roller 2 45, the functionalized protective layer is covered on the front end of the wood-plastic base plate, and then the traction oscillation mechanism 5 is started. The traction oscillation mechanism 5 tractions the functionalized protective layer, that is, after the wood-plastic base plate moves to the bottom of the traction roller 2 45, the output shaft of one of the driving motors 43 drives the traction roller 1 39 to rotate forward, and the output shaft of the other driving motor 43 drives the traction roller 2 45 to rotate reversely, and cooperates with traction of the functionalized protective layer. The speed of the traction oscillation mechanism 5 traction of the functionalized protective layer is equal to the speed of the conveyor 1 on the rear side conveying the wood-plastic base plate. The plastic-based sheet and the functionalized protective layer pass under the sliding roller, and the telescopic ends of the electric push rods 16 drive the hot air box 23 to move downward, and the sliding roller contacts the functionalized protective layer and makes the functionalized protective layer close to the wood-plastic-based sheet. At the same time, the vibration motor 41 drives the vibration frame 40 to oscillate, and the vibration frame 40 drives the traction roller 1 39 and the traction roller 2 45 to oscillate, thereby driving the functionalized protective layer to oscillate, and then the wood-plastic-based sheet and the functionalized protective layer enter the preheating zone, and another high-pressure fan 10 draws air from the exhaust hood 20 and delivers it to the heating zone. Box 9, after being heated in the heating box 9, it is transported to several high-pressure air gun assemblies 17 through the multi-vent valve 8 and blown out through several high-pressure air gun assemblies 17, that is, the telescopic end of the electric push rod 3 26 drives the electric rotating seat 28 and the high-pressure air gun 27 to dynamically adjust the height in real time to make the blown wind pressure consistent, the electric rotating seat 28 drives the high-pressure air gun 27 to rotate, and the output shaft of the dual-axis micro motor rotates, and the reaction makes the high-pressure air gun 27 move, thereby realizing that the high-pressure air gun 27 blows out high-pressure hot air at multiple angles, so that the interface of the functionalized protective layer and the additive printing texture layer is composited.

[0163] The plurality of high-pressure air gun assemblies 17 in the preheating zone blow out hot air to preheat the functionalized protective layer. The hot air moves from the front side to the rear side of the preheating zone, and is finally sucked away from the exhaust hood 20 on the rear side of the upper end of the hot air box 23, and transported to the heating box 9 to form a hot air circulation. The plurality of high-pressure air gun assemblies 17 in the wind pressure zone blow out high-pressure hot air at multiple angles according to the information uploaded by the plurality of visual cameras and the 3D texture information, so that the interface between the functionalized protective layer and the additive printing texture layer is composited to avoid the generation of wrinkles and bubbles. The hot air after lamination enters the preheating zone from the bottom of the wind shield 24 and is finally sucked away to reduce heat loss. , the pressing roller 52 rolls to make the functionalized protective layer and the additive printing texture layer fit closely. While rolling, the pressing ring 51 presses and heat-seals the redundant functionalized protective layer on the edge to the side of the wood-plastic base board to form a wood-plastic base composite material. Then the wood-plastic base composite material passes under the cold air box 34, and the telescopic ends of the four electric push rods 47 drive the cold air box 34 to move downward, so that the interval between the cold air box 34 and the wood-plastic base composite material is reduced. Then one of the high-pressure fans 10 is started to suck air and transport it to the cooling box 7. After being cooled by the cooling box 7, it is transported to the cold air box 34 to cool the wood-plastic base composite material and shape it.

[0164] After cooling, one of the high-pressure fans 10 draws the air in the cold air box 34 through the exhaust hood 2 36, and then delivers it to the cooling box 7 to form a cold air cycle. One of the high-pressure fans 10 draws the air and delivers it to the cooling box 7. After cooling in the cooling box 7, it is delivered to the cold air mechanism 3. The cold air mechanism 3 cools the wood-plastic-based composite material and shapes it. After cooling, one of the high-pressure fans 10 draws the air in the cold air mechanism 3, and then delivers it to the cooling box 7 to form a cold air cycle. According to the information of several visual cameras, when the wood-plastic-based composite material passes under the heat sealing knife 37, the telescopic ends of several electric push rods 5 48 drive the heat sealing knife 37 to move downward, heat the functionalized protective layer covering the front end of the wood-plastic-based composite material and wrap it around the front end of the wood-plastic-based composite material, and then continue to deliver it to the conveyor 1 on the front side and continue to deliver it out.

[0165] The heat-sealing position of the heat-sealing knife 37 is equal to the distance between the two adjacent ends of the wood-plastic-based composite materials. When the functionalized protective layer between the two adjacent ends of the wood-plastic-based composite materials passes under the heat-sealing knife 37, the telescopic ends of the plurality of electric push rods 5 48 drive the heat-sealing knife 37 to move downward, cut the functionalized protective layer, and continue to move downward into the film cutting avoidance port. In the process of downward movement, the heat-sealing knife 37 heat-seals the cut two parts of the functionalized protective layer at the ends of the corresponding positions of the two wood-plastic-based composite materials, and then immediately returns to the initial position, and then continues to be transported to the conveyor 1 on the front side, and continues to be transported out.

[0166] The coating equipment used in the present application can sequentially carry out positioning and conveying, synchronous film release, film relaxation and vibration, hot air circulation preheating of the film, multi-angle stable wind pressure coating, cold air circulation cooling of materials, film cutting and heat sealing, etc. The conveyor 1 on the rear side cooperates with the two side guide mechanisms to stably convey and position the wood-plastic base board material for easy coating; the film release mechanism 4 cooperates with the traction oscillation mechanism 5 to pull the functionalized protective layer so that the functionalized protective layer and the wood-plastic base board move synchronously, reducing the stretching of the functionalized protective layer for easy coating; the traction oscillation mechanism 5 oscillates the softened functionalized protective layer so that the softened functionalized protective layer is uniformly deformed, reducing white marks on the coating and improving the coating quality; the adjustable hot air mechanism 6 cooperates with another high-pressure fan 10, a heating box 9 and a multi-vent valve 8 to form a hot air circulation, reduce heat loss, uniformly preheat the functionalized protective layer, and soften the functionalized protective layer. The laminating effect is better, and the height and angle of the air outlet are adjusted dynamically in real time through the adjustable hot air mechanism 6 to maintain consistent wind pressure, stabilize the pressing, avoid bubbles and wrinkles, and make the finished product more stable; the cold air mechanism 3 cooperates with one of the high-pressure fans 10 and the cooling box 7 to cool and shape the wood-plastic-based composite material, and form a cold air circulation to reduce energy loss and reduce costs; the heat sealing knife mechanism 2 cooperates with the two conveyors 1, and the heat sealing knife 37 cuts the functionalized protective layer and enters the film cutting avoidance port, and heat-seals the two parts of the cut functionalized protective layer at the ends of the corresponding positions of the two wood-plastic-based composite materials to avoid the functionalized protective layer from peeling off from the ends of the wood-plastic-based composite material, thereby ensuring the quality of the finished product.

[0167] The above is a further detailed description of the present invention, which should not be regarded as a limitation on the specific implementation of the present invention. For ordinary technicians in the technical field to which the present invention belongs, simple deduction or replacement without departing from the concept of the present invention is within the protection scope of the present invention.

Claims

1. A process for preparing a wood-plastic composite material with 3D texture, characterized in that: The specific preparation process steps are as follows: Step 1, extrusion of wood-plastic substrate: mixing the raw materials of the wood-plastic substrate layer according to the mass ratio, stirring them evenly, and feeding them into an extruder for extrusion to obtain the wood-plastic substrate; Step 2: Shaping: The substrate is cooled to 80-90°C through a shaping die for shaping; Step 3, 3D texture printing: put the additive wire bundle into the 3D printer 1-2 hours in advance, heat the surface of the substrate after primary cooling and shaping to 125-140°C with high-temperature plasma, and then perform 3D texture printing to form an additive printing texture layer and a wood-plastic base board. After printing, use an infrared heater to heat and soften the wood-plastic base board to melt the surface, and then send it to the laminating machine; Step 4, laminating: placing the surface-molten wood-plastic composite board into the laminating equipment in sequence by using guide rollers, performing wind pressure lamination on the surface of the additive printing texture layer to form a functionalized protective layer, and then compounding the interface of the functionalized protective layer and the additive printing texture layer, and cooling and shaping; Step 5: Finished product processing: cutting the obtained wood-plastic composite material to a fixed length and stacking; The structure of the composite material is a functionalized protective layer, an additive printing texture layer, and a wood-plastic base material layer from the surface to the core, wherein the functionalized protective layer, the additive printing texture layer, and the wood-plastic base material layer are formed by heating and melting the layers and pressing each other between the layers, wherein: The functionalized protective layer is a multifunctional plastic layer with transparent or translucent properties, wherein the mass ratio of the plastic matrix in the functionalized protective layer is not less than 40%, and the mass ratio of the ion polymer is 10%-25%; The additive printing texture layer is a 3D texture layer with complex and multi-colors prepared by additive materials; The wood-plastic substrate layer is prepared by compounding 30 to 85 parts by weight of biomass fibers, 15 to 65 parts by weight of plastics, 2 to 15 parts by weight of an easily precipitated interface compatibilizer, 1 to 12 parts by weight of an interface compatibilizer that is not easily precipitated, 0.4 to 12 parts by weight of a pigment, and 4 to 15 parts by weight of a processing aid; the easily precipitated interface compatibilizer is precipitated during the melting process of the wood-plastic substrate, fixed on the surface, and directly forms an interface bond with the additive printing texture layer.

2. The preparation process of the wood-plastic-based composite material with 3D texture according to claim 1, characterized in that: The film laminating equipment in step 4 comprises a U-shaped frame and two conveyors (1) arranged inside the U-shaped frame, a film cutting avoidance opening is formed between the two conveyors (1), symmetrically arranged side guide mechanisms are arranged on both sides of the U-shaped frame, the side guide mechanisms are located above the rear conveyor (1), and the upper end of the U-shaped frame is provided with a film placing mechanism (4), a traction oscillation mechanism (5), an adjustable hot air mechanism (6), a cold air mechanism (3) and a heat sealing knife mechanism (2) in sequence from the back to the front, the heat sealing knife mechanism (2) is located directly above the film cutting avoidance opening, and the U-shaped frame is provided with a film placing mechanism (4), a traction oscillation mechanism (5), an adjustable hot air mechanism (6), a cold air mechanism (3) and a heat sealing knife mechanism (2). The heat sealing knife mechanism (2) is located directly above the film cutting avoidance opening. A cooling box (7), a multi-vent valve (8), a heating box (9) and two high-pressure fans (10) are provided at the lower inner side of the frame, wherein one of the high-pressure fans (10), the cooling box (7) and the cold air mechanism (3) are connected in pairs through air pipes to form a cold air circulation, and another high-pressure fan (10), the heating box (9), the multi-vent valve (8) and the adjustable hot air mechanism (6) are connected in sequence through air pipes, and another high-pressure fan (10) is connected to the adjustable hot air mechanism (6) through an air pipe to form a hot air circulation.

3. The preparation process of the wood-plastic-based composite material with 3D texture according to claim 2, characterized in that: The U-shaped frame is provided with two symmetrically arranged U-shaped limit frames (11), the U-shaped limit frames (11) are located above the conveyor (1) on the rear side, the side guide mechanism comprises an electric push rod (14), the electric push rod (14) is fixed on the outer side of the U-shaped frame, the telescopic end of the electric push rod (14) is detachably provided with a guide wheel rod (15), the guide wheel rod (15) is located above the conveyor (1) on the rear side, and a plurality of guide wheels are rotatably provided on the guide wheel rod (15), the film placing mechanism (4) comprises two symmetrically arranged mounting plates (12), the two mounting plates (12) are fixed on the upper end of the U-shaped frame and are located on the rear side of the two U-shaped limit frames (11), a mold placing roll (44) and a guide roller are rotatably provided between the two mounting plates (12), the guide roller is located at the rear side and below the mold placing roll (44), a crossbeam (13) is fixed between the two mounting plates (12), and a plurality of visual cameras are provided on the lower end surface of the crossbeam (13).

4. The preparation process of the wood-plastic-based composite material with 3D texture according to claim 3, characterized in that: The traction oscillation mechanism (5) comprises a vibration frame (40), a traction roller 1 (39), a traction roller 2 (45), two drive motors (43) and two bearing seats (42). The vibration frame (40) is slidably arranged in two U-shaped limit frames (11). A plurality of spring rods are arranged between the bottom ends of both sides of the vibration frame (40) and the U-shaped limit frames (11) at corresponding positions. A vibration motor (41) is fixed to the upper end of the vibration frame (40). The traction roller 1 (39) is located directly above the traction roller 2 (45). The traction roller 1 (39) and the traction roller 2 (45) are separated by a distance. One of the drive motors (43) and one of the bearing seats ( The first traction roller (39) and the second traction roller (45) are respectively movably arranged on the left and right sides of the vibration frame (40), another driving motor (43) and another bearing seat (42) are respectively fixed on the left and right sides of the vibration frame (40), one end of the traction roller (39) is fixed to the inner ring of one of the bearing seats (42), and the other end of the traction roller (39) is fixedly connected to the output shaft of one of the driving motors (43), one end of the traction roller (45) is fixed to the inner ring of the other bearing seat (42), and the other end of the traction roller (45) is fixedly connected to the output shaft of the other driving motor (43), and the traction roller (39) and the traction roller (45) rotate in opposite directions.

5. The process for preparing the wood-plastic composite material with 3D texture according to claim 4, characterized in that: The adjustable hot air mechanism (6) comprises a support frame (18), two movable plate assemblies (19) and a hot air box (23), wherein the support frame (18) is fixed to the upper end of the U-shaped frame, a plurality of electric push rods (16) are fixed to the upper end of the support frame (18), and the hot air box (23) is fixed to the telescopic ends of the plurality of electric push rods (16). A pressure roller (52) is rotatably provided on the front side of the outside of the hot air box (23), the outer ring of the pressure roller (52) is made of elastic material, the outer ring of the pressure roller (52) is lower than the lower end surface of the hot air box (23), and the outer ring of the pressure roller (52) is provided with two movable pressure rings (51). A sliding roller is rotatably provided on the lower end of the rear side of the hot air box (23), and an exhaust hood (20) is provided on the upper rear side of the hot air box (23). The wind shield (20) is connected to the air inlet of another high-pressure fan (10) through an air pipe. A wind shield (24) is provided inside the hot air box (23). The bottom of the wind shield (24) is higher than the bottom of the front hot air box (23). The wind shield (24) is located directly below the plurality of electric push rods (16). The wind shield (24) divides the inside of the hot air box (23) into a wind pressure zone located at the front and a preheating zone located at the rear. Sliding grooves are provided at both ends of the wind shield (24). The movable plate assembly (19) includes a movable plate (50). A sliding plate (31) is provided on the side of the movable plate (50). The sliding plates (31) of the two movable plate assemblies (19) are respectively slidably arranged in the corresponding sliding grooves. The upper end surface of the movable plate (50) is provided with A toggle rod (33) extends out of the upper end surface of the hot air box (23). Both sides of the upper end of the toggle rod (33) are provided with fixing plates (32). The fixing plates (32) are provided with fixing screw holes. Fixing screws (22) are screwed into the fixing screw holes. The fixing screws (22) abut against the upper end surface of the hot air box (23). The upper end surface of the hot air box (23) is provided with a plurality of rows of insertion openings (21) and a plurality of rows of screw holes. The plurality of rows of insertion openings (21) are divided into two parts and are respectively located at the front and rear sides of the wind shield (24). A high-pressure air gun assembly (17) is detachably provided in the insertion opening (21). The high-pressure air gun assembly (17) includes a fixing seat (25) and a high-pressure air gun (27). The fixing seat (25) is provided with a captive screw. The fixing seat (25) is fixed to the upper end surface of the hot air box (23) by screwing the captive screws with the screw holes. A pipe through hole (29) is provided on the fixing seat (25). The pipe through hole (29) is communicated with the insertion port (21). A lifting block (30) is fixed to the upper end of the fixing seat (25). An electric push rod 3 (26) is fixed to the lower end surface of the fixing seat (25). The electric push rod 3 (26) extends into the insertion port (21) at a corresponding position. An electric rotating seat (28) is fixed to the telescopic end of the electric push rod 3 (26). A connecting seat is provided at the end of the electric rotating seat (28). A high-pressure air gun (27) is rotatably arranged on the inner side of the end of the connecting seat. The high-pressure air gun (27) is connected to the multi-vent valve (8) through an air pipe passing through the pipe through hole (29).A double-shaft micro motor is provided at the end of the high-pressure air gun (27), and the output shaft of the double-shaft micro motor is fixedly connected to the connecting seat.

6. The process for preparing the wood-plastic composite material with 3D texture according to claim 5, characterized in that: The cold air mechanism (3) comprises a second support frame (46) and a cold air box (34), wherein the second support frame (46) is fixed to the upper end of the U-shaped frame, a plurality of electric push rods (47) are fixed to the upper end of the second support frame (46), and the cold air box (34) is fixed to the telescopic ends of the plurality of electric push rods (47). A cold air blowing pipe (35) is provided on the front inner side of the cold air box (34), and the cold air blowing pipe (35) is connected to the cooling box (7) via an air pipe. An exhaust hood (36) is provided on the rear upper end of the cold air box (34), and the exhaust hood (36) is connected to the air inlet of one of the high-pressure fans (10) via an air pipe. The heat sealing knife mechanism (2) comprises a support frame three (49) and a heat sealing knife (37); the support frame three (49) is fixed to the upper end of the U-shaped frame; a plurality of electric push rods five (48) are fixed to the upper end of the support frame three (49); the heat sealing knife (37) is fixed to the telescopic ends of the plurality of electric push rods five (48); a plurality of electric heating tubes (38) are arranged inside the heat sealing knife (37); and the heat sealing knife (37) is located directly above the film cutting avoidance opening.

7. The process for preparing the wood-plastic composite material with 3D texture according to claim 6, characterized in that: The functionalized protective layer also includes 0.5%-5% by weight of nano-scale metal oxide, 4%-15% of thermoplastic elastomer, 0.1%-1% of ultraviolet absorber, 0.2%-2% of lubricant, 0.1%-0.5% of antioxidant, and 2%-10% of ZSM-5 zeolite.

8. The process for preparing the wood-plastic composite material with 3D texture according to claim 7, characterized in that: The additive printing texture layer is composed of an additive color developing body with a mass ratio of 70%-90% and a molten base material with a mass ratio of 10%-30%. The additive color developing body and the molten base material are first mixed evenly in a mixer, then sampled into wire bundles through a wire making machine, and finally placed on a 3D printer for use.

9. The process for preparing the wood-plastic composite material with 3D texture according to claim 8, characterized in that: The processing aid used in the wood-plastic substrate layer is prepared by mixing 7% to 42% by weight of a lubricant, 1% to 9% by weight of a heat stabilizer and an inorganic filler.

10. The process for preparing the wood-plastic composite material with 3D texture according to claim 9, characterized in that: The interfacial compatibilizer that is easy to precipitate is at least one of high melt index maleic anhydride grafted polyethylene MAPE, maleic anhydride grafted polypropylene MAPP and ionomer, and its melt index at 190°C / 2.16kg is 10-30g / 10min; the interfacial compatibilizer that is not easy to precipitate is at least one of MAPE, MAPP, ionomer, silane coupling agent and aluminate coupling agent, among which the melt index of MAPE, MAPP and ionomer at 190°C / 2.16kg is 0.2-3.0 g / 10min.

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