Vacuum microwave drying furnace for liquid phase rubber film production

Abstract

The present invention relates to a vacuum microwave drying furnace for producing rubber sheets by a liquid phase method, comprising an industrial microwave oven capable of evacuating vacuum, a conveyor belt system, a pulp distributing machine, a laser defoaming machine and a laminating machine, wherein the conveyor belt system is arranged inside the industrial microwave oven along the length direction, the pulp distributing machine is located inside the industrial microwave oven and correspondingly arranged above the conveyor belt, the laser defoaming machine is located downstream of the pulp distributing machine and correspondingly arranged above the conveyor belt, and the laminating machine is arranged inside the industrial microwave oven and downstream of the conveyor belt system. The present invention can effectively improve the physical properties of the produced rubber sheets.

Description

Technical Field

[0001] The invention belongs to the technical field of rubber film production, and particularly relates to a vacuum microwave drying furnace for producing rubber film by a liquid phase method. Background Art

[0002] Rubber is an elastic polymer that can be obtained from plant sap or artificially produced. Both have many applications and products, such as tires, gaskets, gloves, condoms, etc. Rubber can be divided into block rubber, latex, etc. according to its form.

[0003] The common process flow of modern rubber industry is: for blocky raw rubber, it is mixed and kneaded with its matching reinforcing agent, vulcanizing agent, accelerator, antioxidant, softener, filler, etc. to form a semi-finished mixed rubber product, and then vulcanized with molds, vulcanizers, vulcanizing tanks, etc. to make various relatively thick products. For latex, it is mixed with the raw materials of the compounding agent to form an emulsion, dipped in the mold, so that the mixed emulsion wraps the surface of the mold to form a wet film, and then vulcanized into various thin products after drying.

[0004] Since the invention of vulcanized rubber technology, thick rubber products have always followed the following general process flow: tree cutting latex - drying into dry rubber - plasticizing - mixing, adding sulfur, reinforcing agent, antioxidant, softener, filler and accelerator during mixing, and finally vulcanizing to obtain the finished product. Vulcanization is the cross-linking process in which the rubber macromolecules change from a linear structure to a network structure under certain conditions. However, this traditional process cannot achieve high rebound rate, high elongation, low hardness, and high strength finished rubber for natural rubber. However, products made directly from latex can reach a rebound rate of more than 80%, a Shore hardness of 38 degrees, an elongation at break of 900%, and a tensile strength of 27Mpa. Such indicators are of great significance in the application of industrial fields.

[0005] High rebound rate means that the rubber absorbs less energy, generates less heat inside, and has good resistance to thermal fatigue; low hardness means that the rubber has a strong ability to withstand the impact of external objects; high elongation at break means that the rubber has a strong ability to resist deformation fatigue; high tensile strength means that it has a strong ability to resist external damage. However, it is not possible to make thick industrial products directly from latex from a technological point of view. In order to achieve or approach the physical properties of latex products, the American Weir Company uses the "liquid phase method" to produce rubber with performance close to that of latex products. The wear-resistant industrial products it produces have a service life 2 to 8 times that of traditional rubber products.

[0006] The basic principle of Weir's use of the "liquid phase method" to manufacture rubber is: latex is mixed with other processed compounding raw materials into an emulsion; then it is spread out and dried; the dried rubber is then rolled out into thin sheets through an open mixing mill and laminated into sheets of a certain thickness. Because the rubber has not undergone mechanical shearing during the plasticizing and mixing process, it maintains its original high molecular weight and retains the rubber's excellent indicators such as elasticity to the maximum extent; the sheets are cut into pieces, put into molds and vulcanized to make products.

[0007] The following is a comparison of the main physical indicators of Weir's "liquid phase method" film production and traditional process film production:

[0008] content Weir Liquid Phase Method Traditional crafts Tensile strength(MPa) 20.58 21～23 Tear strength(N / mm) 25.23 19～24 Permanent deformation at break (%) 1.78 2～4 Tensile elongation (%) 907 500～650 Hardness(Shore A) 38 45～65 Rebound(%) 75 42

[0009] However, from the perspective of various indicators of Weir's "liquid phase method", there is still a large gap compared with the performance indicators of latex (rebound rate can reach more than 80%, Shore hardness 38 degrees, elongation at break can reach more than 900%, and tensile strength can reach 27Mpa). This is because the existing Weir "liquid phase method" process mainly has the following problems: First, when drying rubber sheets, a heat radiation furnace is used for drying. The temperature in the heat radiation furnace is relatively high (70-80°C), which will damage the useful protein contained in the latex and thus reduce the physical indicators; second, the temperature transfer in the heat radiation furnace relies on air as a medium, so it will inevitably cause oxidation of the film surface and have a negative impact on the mechanical indicators; third, the use of an open mill to dissipate the sheet will shear the dried rubber material and break some rubber molecular chains, thereby reducing the physical indicators of the film; fourth, the film stacking is carried out in the atmosphere, and there will be a large amount of residual gas between the film layers. The residual bubbles formed after stacking will affect its physical indicators. Summary of the invention

[0010] The technical problem to be solved by the present invention is to provide a vacuum microwave drying furnace for producing rubber sheets by a liquid phase method, which is beneficial to improving the physical properties of the rubber sheets.

[0011] The technical solution adopted by the present invention to solve its technical problems is to provide a vacuum microwave drying furnace for producing rubber sheets by a liquid phase method, comprising an industrial microwave oven that can be evacuated, a conveyor belt system, a pulp distributing machine, a laser defoaming machine and a stacking machine. The conveyor belt system is arranged inside the industrial microwave oven along the length direction, the pulp distributing machine is located inside the industrial microwave oven and correspondingly arranged above the conveyor belt, the laser defoaming machine is located downstream of the pulp distributing machine and correspondingly arranged above the conveyor belt, and the stacking machine is arranged inside the industrial microwave oven and downstream of the conveyor belt system.

[0012] The pulp distributing machine includes a pulp pool, a wave-breaking plate, a pulp distributing buffer plate and a mounting frame. A weir outflow port is formed on one side of the pulp pool. An inclined guide plate is provided at a position of the pulp pool corresponding to the weir outflow port. The pulp pool is arranged on the mounting frame. The wave-breaking plate is arranged inside the pulp pool. A continuous pulp flow channel is formed between the wave-breaking plate, the bottom of the pulp pool and the weir outflow port. Both sides of the pulp distributing buffer plate are folded upward. The upper end of the pulp distributing buffer plate is rotatably connected to the pulp pool and docked with the inclined guide plate. The bottom is movably connected to the mounting frame and the inclination angle of the pulp distributing buffer plate can be adjusted.

[0013] The laser defoaming machine is arranged adjacent to the pulp distributing machine and installed on the top of the industrial microwave oven. A laser beam transmission window is arranged on the top of the industrial microwave oven corresponding to the installation position of the laser defoaming machine.

[0014] The stacking machine includes a pulley, a pressure roller, a stacking conveyor belt, a follower trolley, a belt-supporting mechanism and a sheet-pressing mechanism. The pulley and the pressure roller are horizontally correspondingly arranged. The stacking conveyor belt is mounted on the pulley and the pressure roller for transmission. The sheet-pressing mechanism is arranged to cooperate with the pressure roller to stack the rubber film. The belt-supporting mechanism is arranged at the bottom of the upper stacking conveyor belt. The follower trolley can be slidably arranged below the lower stacking conveyor belt and the material-supporting height of the follower trolley can be raised and lowered and adjusted.

[0015] The sheet pressing mechanism comprises a cylinder and a rubber pressing roller installed on the cylinder and driven by the cylinder, and the rubber pressing roller is arranged to correspond to the pressure bearing roller.

[0016] The follower trolley includes a second bracket, a second follower roller, a second follower belt and a lifting drive mechanism, the two ends of the second follower belt are respectively mounted on the second follower roller, the second follower roller is installed on the second bracket, and the second bracket is installed on the lifting drive mechanism. The upper surface of the second follower belt forms a follower support with the surface of the laminated tape at the bottom of the lower laminate conveyor belt.

[0017] The industrial microwave oven is provided with openable oven doors at both ends, and a plurality of openable side doors are provided at intervals along the length direction on the side. The side doors are provided with windows whose inner surfaces can be wiped in a closed state.

[0018] The conveyor belt system includes a conveyor belt, a head wheel, a tail wheel, a plurality of conveyor belt support plates, a plurality of conveyor belt rollers and a gravity tensioning mechanism. The head and tail ends of the conveyor belt are respectively mounted on the head wheel and the tail wheel and the tension is adjusted by the gravity tensioning mechanism. The front section of the conveyor belt system is provided with a plurality of conveyor belt support plates at intervals to support the upper layer of the conveyor belt, and the plurality of conveyor belt rollers are arranged at intervals at the bottom of the upper layer of the conveyor belt to support the conveyor belt.

[0019] Microwave suppressors are respectively arranged near the head and the tail end of the transmission belt in the industrial microwave oven.

[0020] The industrial microwave oven is provided with a vacuum tube, and the vacuum tube is communicated with the inner cavity of the industrial microwave oven at intervals along the length direction.

[0021] Beneficial Effects

[0022] First, in the present invention, the Weir liquid phase method of using a thermal radiation furnace to dry the rubber mortar is abandoned, and an industrial microwave oven is used to dry the rubber mortar. The microwave drying method reduces the drying temperature of the mortar (not more than 50°C), reduces the damage to the useful protein contained in the mortar, and is beneficial to improving the physical indicators of the film after drying.

[0023] Second, in the present invention, the drying process of the adhesive is completed in a vacuum environment, which avoids direct contact between the adhesive and air during the drying process, is beneficial to avoid oxidation of the film surface, and is beneficial to the physical properties of the rubber film.

[0024] Third, the glue may contain bubbles. In the present invention, a laser defoaming machine is used to defoam the bubbles in the glue during the drying process, which can effectively avoid the presence of gas in the dried film. Moreover, the lamination process is completed in a vacuum environment, which avoids residual gas between the film layers and is beneficial to improving the physical indicators of the film.

[0025] Fourthly, the present invention avoids the use of an open mixer to sheet the rubber compound during the Weir liquid phase lamination process, avoids shearing of the dried film, and avoids the interruption and destruction of the rubber macromolecular network structure, thereby facilitating the improvement of the physical properties of the rubber film.

[0026] Fifth, in the present invention, the pulp discharging and pulp spreading structure of the pulp spreading machine can ensure the stability and uniformity of the pulp spreading, which is beneficial to ensure the continuous and stable production of the film, ensure the uniformity of the film thickness, and is also beneficial to the stable lamination of the dry film. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention.

[0028] Figure 2 It is a schematic diagram of the front structure of the wipeable window.

[0029] Figure 3 It is a schematic diagram of the cross-sectional structure of the wipeable window.

[0030] Figure 4 It is a structural schematic diagram of a pulping machine.

[0031] Figure 5 This is a schematic diagram of the pulp pool structure of the pulp distributing machine.

[0032] Figure 6 This is a schematic diagram of the cross-sectional structure of the pulp spreading buffer plate of the pulp spreading machine.

[0033] Figure 7 This is a schematic diagram of the front structure of the wave-damping plate of the pulp spreading machine.

[0034] Figure 8 for Figure 7 Schematic diagram of the AA section structure.

[0035] Fig. 9 It is a structural schematic diagram of the lamination machine. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0037] like Figure 1 The vacuum microwave drying furnace for producing rubber sheets by the liquid phase method shown in the figure comprises an industrial microwave oven 1 capable of evacuating vacuum, a conveyor belt system, a pulp spreading machine 2, a laser defoaming machine 3 and a stacking machine 4. The conveyor belt system is arranged inside the industrial microwave oven 1 along the length direction, and the stacking machine 4 is arranged corresponding to the conveyor belt system in the length direction. The stacking machine 4 is arranged inside the industrial microwave oven 1 and is located downstream of the conveyor belt system. The pulp spreading machine 2 is located inside the industrial microwave oven 1, and is arranged directly above the upstream end of the conveyor belt 5. The laser defoaming machine 3 is installed on the top of the industrial microwave oven 1 and is located downstream of the pulp spreading machine 2, and is correspondingly arranged directly above the conveyor belt 5, and the laser direction is opposite to the conveyor belt 5.

[0038] The top of the industrial microwave oven 1 is provided with a vacuum tube 12, which is connected to the internal cavity of the industrial microwave oven 1 at intervals along the length direction, and is used to vacuum the industrial microwave oven 1. The bottom of the industrial microwave oven 1 is provided with a furnace body support, and both ends are provided with openable furnace doors 1-1, and the side is provided with openable side doors 1-2 at intervals along the length direction, which can facilitate production operation and maintenance. The side door 1-2 is provided with a window 1-3, and the inner surface of the window 1-3 can be wiped when the side door 1-2 is in a closed state.

[0039] like Figure 2 and Figure 3As shown, the tempered glass 1-3-1 of the window 1-3 is sealed and clamped between the window fixing frame 1-3-2 and the side door panel. A wiping control block 1-3-3 is provided on the outer side of the tempered glass 1-3-1, and a wiping follower block 1-3-4 is provided on the inner surface. The wiping control block 1-3-3 and the wiping follower block 1-3-4 are respectively provided with mutually attractive magnets to form a follow-up. By moving the wiping control block 1-3-3 outside the furnace. The wiping follower block 1-3-4 can be controlled to move on the inner surface of the tempered glass 1-3-1, and the water droplets generated by the condensation of the evaporated water vapor inside the furnace body on the inner side of the tempered glass 1-3-1 can be wiped, which is easy to operate. A microwave filter 1-3-5 is provided on the inner side of the window 1-3, which can effectively reduce microwave leakage pollution.

[0040] The conveyor belt system includes a conveyor belt 5, a first wheel 6, a tail wheel 7, a conveyor belt support plate 8, a conveyor belt roller 9 and a gravity tensioning mechanism 10. The conveyor belt 5 adopts a jointless whole belt, and its head and tail ends are respectively mounted on the first wheel 6 and the tail wheel 7. A gravity tensioning mechanism 10 is provided near the tail end of the conveyor belt 5, and the conveyor belt 5 is adjusted and tensioned by the gravity tensioning mechanism 10. When the conveyor belt 5 is working, the front section conveys rubber wet slurry, which is heavy. Therefore, a conveyor belt support plate 8 is arranged at intervals at the front section of the conveyor belt 5 to support the upper layer of the conveyor belt 5, and conveyor belt rollers 9 are arranged at intervals at the bottom of the upper layer of the conveyor belt 5 in the entire length direction of the conveyor belt 5 to support the conveyor belt 5, so as to ensure that the conveyor belt 5 runs stably and reliably. Microwave suppressors 11 are respectively provided near the head and tail ends of the transmission belt 5 inside the industrial microwave oven 1 to control the tail radiation leakage to meet the national standard.

[0041] like Figure 4 As shown, the pulp distributing machine 2 includes a pulp pool 2-1, a wave reduction plate 2-2, a pulp distributing buffer plate 2-3, a mounting frame 2-4, a basket screw 2-5 and a limiting plate 2-6.

[0042] The entire pulp spreading machine 2 is installed in the industrial microwave oven 1 through the mounting frame 2-4. The mounting frame 2-4 includes four support seats 2-4-1, two longitudinal support rods 2-4-2, four support connectors 2-4-3 and two transverse support rods 2-4-4. The two longitudinal support rods 2-4-2 are arranged along a conveying direction perpendicular to the conveyor belt 5, and the two ends of the longitudinal support rods 2-4-2 are supported by the support seats 2-4-1 respectively. The two transverse support rods 2-4-4 are arranged along a conveying direction parallel to the conveyor belt 5, and the two ends of the transverse support rods 2-4-4 are vertically connected to the two longitudinal support rods 2-4-2 through the support connectors 2-4-3 respectively. A buffer support pad 2-4-5 is provided on the support connector 2-4-3, which is beneficial to improving the stability of the pulp spreading.

[0043] like Figure 5As shown, the pulp pool 2-1 is a rectangular trough structure for storing glue. A weir outflow outlet is formed on one side of the pulp pool 2-1. An inclined guide plate 2-1-1 is provided at a position corresponding to the weir outflow outlet of the pulp pool 2-1, and a retaining edge 2-1-2 is provided on both sides of the inclined guide plate 2-1-1 of the pulp pool 2-1. Folding edges are provided on both sides of the pulp pool 2-1, and the pulp pool 2-1 is hung on two parallel transverse support rods 2-4-4 through the folding edges.

[0044] like Figure 7 and Figure 8 As shown, the wave-breaking plate 2-2 is a vertical plate as a whole, and its length matches the inner cavity length of the pulp pool 2-1. A horizontal resting flange 2-2-1 is formed at the upper end of the wave-breaking plate 2-2, and the resting flange 2-2-1 protrudes on both sides. Support feet 2-2-2 are provided on both sides of the bottom of the wave-breaking plate 2-2, and a slurry flow channel 2-2-3 is formed between the support feet 2-2-2 on both sides. The wave-breaking plate 2-2 is arranged inside the pulp pool 2-1, and is hung on both sides of the pulp pool 2-1 through the resting flange 2-2-1. The support feet 2-2-2 are supported on the bottom of the pulp pool 2-1. A continuous slurry flow channel is formed between the wave-breaking plate 2-2 and the bottom of the pulp pool 2-1 and the weir outflow outlet, and the distance between the slurry flow channel between the wave-breaking plate 2-2 and the weir outflow outlet can be adjusted, so that the slurry thickness can be adjusted.

[0045] The pulp buffer plate 2-3 is a slideway structure with two sides folded upward, and its transverse section is as follows: Figure 6 As shown. The folded edges on both sides of the upper end of the slurry buffer plate 2-3 are axially connected to the retaining edge 2-1-2 respectively, and the slurry buffer plate 2-3 is arranged at the bottom of the inclined guide plate 2-1-1 to form a docking, so as to ensure that the slurry can smoothly and completely flow from the inclined guide plate 2-1-1 to the slurry buffer plate 2-3. The folded edges on both sides of the bottom of the slurry buffer plate 2-3 are respectively connected to the transverse support rod 2-4-4 through the basket screws 2-5. The inclination angle of the slurry buffer plate 2-3 can be adjusted by retracting the basket screws 2-5, so that the lower end of the slurry buffer plate 2-3 is located on the conveyor belt 5. Limiting plates 2-6 are respectively provided on both sides of the end of the slurry buffer plate 2-3. The limiting plates 2-6 are arranged on the surface of the conveyor belt 5 along the conveying direction, which can play a role in limiting the flow of slurry to both sides of the conveyor belt 5.

[0046] When the pulp distributing machine 2 is in operation, the mixed rubber slurry is continuously and equally injected into the pulp pool 2-1; the slurry flows into the slurry flow channel from the bottom of the pulp pool 2-1, and flows out from the weir outflow port continuously, stably and evenly; the rubber material continues to flow downward along the inclined guide plate 2-1-1 and the pulp distributing buffer plate 2-3 and is further homogenized; finally, the rubber material flows evenly onto the conveyor belt 5 and is further transported forward.

[0047] The laser defoamer 3 is installed on the top of the industrial microwave oven 1 and is adjacent to the downstream of the pulp dispensing machine 2. A laser beam transmission window is provided on the top of the industrial microwave oven 1 corresponding to the installation position of the laser defoamer 3. During production, the glue may contain bubbles. The glue is defoamed by the laser defoamer 3 during transportation, which can effectively prevent the dry film from containing gas.

[0048] like Fig. 9 As shown, the stacking machine 4 includes a pulley 4-1, a pressure roller 4-2, a stacking conveyor belt 4-3, a follower trolley 4-4, a belt supporting mechanism 4-5 and a sheet pressing mechanism. The stacking machine 4 is arranged at the rear of the oven cavity of the industrial microwave oven 1.

[0049] The pulley 4-1 and the pressure roller 4-2 are arranged horizontally and correspondingly, and the pressure roller 4-2 is located upstream of the pulley 4-1. The two ends of the laminated conveyor belt 4-3 are respectively mounted on the pulley 4-1 and the pressure roller 4-2 for transmission, and the laminated conveyor belt 4-3 is an adhesive belt.

[0050] The sheet pressing mechanism includes a cylinder 4-7 and a rubber pressing roller 4-8, which is mounted on the cylinder 4-7 and driven by the cylinder 4-7. The rubber pressing roller 4-8 is arranged just above the pressure roller 4-2, and the rubber pressing roller 4-8 and the pressure roller 4-2 cooperate to overlap the rubber sheet 13 conveyed between the rubber pressing roller 4-8 and the pressure roller 4-2. A guide roller 14 is arranged at the tail end of the conveyor belt 5, which can guide the rubber sheet 13 conveyed to the pressure roller 4-2 and the rubber pressing roller 4-8.

[0051] The belt support mechanism 4-5 is arranged at the bottom of the upper stacking conveyor belt 4-3, and is used to support the rubber sheets stacked on the upper stacking conveyor belt 4-3. The belt support mechanism 4-5 includes a first bracket 4-5-1, a first follower roller 4-5-2 and a first follower support belt 4-5-3. The two ends of the first follower support belt 4-5-3 are respectively mounted on the first follower roller 4-5-2, and the first follower roller 4-5-2 is installed on the first bracket 4-5-1. The upper surface of the first follower support belt 4-5-3 forms a follower support with the bottom surface of the upper stacking conveyor belt 4-4-3.

[0052] The follower trolley 4-4 is arranged below the lower laminated sheet conveyor belt 4-3, and is used to carry the rubber film stacked on the lower laminated sheet conveyor belt 4-3. The carrying height of the follower trolley 4-4 can be adjusted to match the change in the thickness of the rubber film stacking. The follower trolley 4-4 includes a second bracket 4-4-1, a second follower roller 4-4-2, a second follower belt 4-4-3, a lifting drive mechanism 4-4-4, a base 4-4-5, a pulley 4-4-6 and a slide rail 4-4-7. The slide rail 4-4-7 is installed at the tail of the industrial microwave oven 1, and the pulley 4-4-6 is installed on the base 4-4-5 and the pulley 4-4-6 is slidably arranged on the slide rail 4-4-7. The second bracket 4-4-1 is installed on the base 4-4-5 through the lifting drive mechanism 4-4-4. The lifting drive mechanism 4-4-4 is a turbine screw lift. The second bracket 4-4-1 can be driven by the turbine screw lift to be lifted and lowered. The two ends of the second follower belt 4-3-3 are respectively mounted on the second follower roller 4-4-2. The second follower roller 4-4-2 is installed on the second bracket 4-4-1. The upper surface of the second follower belt 4-4-3 and the laminated tape surface at the bottom of the lower laminated conveyor belt 4-4-3 form a follower support. The rear end of the industrial microwave oven 1 is provided with a rear door, through which the follower trolley 4-4 can be dragged out from the rear end of the industrial microwave oven 1.

[0053] When the stacking machine 4 is working: the dried thin rubber film 13 is transported to between the pressure roller 4-2 and the rubber pressing roller 4-8 through the guide roller 14, and the rubber film 13 is pressed by the cooperation between the pressing mechanism and the pressure roller 4-2 and stacked layer by layer on the stacking conveyor belt 4-3. The follower trolley 4-4 meets the need for follow-up support for the thick rubber belt through lifting and lowering adjustment.

[0054] During the operation of the vacuum microwave drying furnace for producing rubber film by the liquid phase method, the slurry is evenly distributed by the slurry distributing machine 2, the industrial microwave oven 1 performs low-temperature microwave drying on the slurry, the laser defoaming machine 3 defoams the slurry during the drying process, and the stacking machine 4 avoids shearing the film. The entire slurry distributing, drying and stacking process is carried out in a vacuum environment. The present invention specifically solves the technical problems existing in the process of producing rubber by the Weir liquid phase method, and the physical indicators of the rubber obtained are significantly better than those of the Weir liquid phase method. The performance test comparison is as follows:

[0055] content Liquid rubber mixing vacuum process Weir Liquid Phase Method Tensile strength(MPa) 23.83 20.58 Tear strength(N / mm) 31.09 25.23 Permanent deformation at break (%) 1.02 1.78 Tensile elongation (%) 985 907 Hardness(Shore A) 38 38 Rebound(%) 80 70

Claims

1. A vacuum microwave drying furnace for producing rubber sheets by liquid phase method, characterized in that: The invention comprises a vacuum-capable industrial microwave oven (1), a conveyor belt system, a pulp distributing machine (2), a laser defoaming machine (3) and a laminating machine (4), wherein the conveyor belt system is arranged inside the industrial microwave oven (1) along the length direction, the pulp distributing machine (2) is located inside the industrial microwave oven (1) and is correspondingly arranged above the conveyor belt (5), the laser defoaming machine (3) is located downstream of the pulp distributing machine (2) and is correspondingly arranged above the conveyor belt (5), and the laminating machine (4) is arranged inside the industrial microwave oven (1) and is located downstream of the conveyor belt system; The laminating machine (4) comprises a pulley (4-1), a pressure roller (4-2), a laminating conveyor belt (4-3), a follower trolley (4-4), a belt-supporting mechanism (4-5) and a sheet pressing mechanism. The pulley (4-1) and the pressure roller (4-2) are arranged horizontally and correspondingly. The laminating conveyor belt (4-3) is mounted on the pulley (4-1) and the pressure roller (4-2) for conveying. The sheet pressing mechanism is arranged to cooperate with the pressure roller (4-2) to laminate the rubber sheet (13). The belt-supporting mechanism (4-5) is arranged on the upper laminating layer. The conveyor belt (4-3) is at the bottom of the conveyor belt (4-3), the follower trolley (4-4) can be slidably arranged below the lower laminated sheet conveyor belt (4-3), and the support height of the follower trolley (4-4) can be adjusted up and down; the sheet pressing mechanism includes a cylinder (4-7) and a rubber pressing roller (4-8) installed on the cylinder (4-7) and driven by the cylinder (4-7), and the rubber pressing roller (4-8) is arranged to correspond to the pressure bearing roller (4-2); the follower trolley (4-4) includes a second bracket (4-4-1), a second follower roller (4-4-2 ), a second follower belt (4-4-3) and a lifting drive mechanism (4-4-4), the two ends of the second follower belt (4-3-3) are respectively mounted on the second follower roller (4-4-2), the second follower roller (4-4-2) is installed on the second bracket (4-4-1), the second bracket (4-4-1) is installed on the lifting drive mechanism (4-4-4), the upper surface of the second follower belt (4-4-3) and the surface of the laminated tape at the bottom of the lower laminated sheet conveyor belt (4-3) form a follower support.

2. The vacuum microwave drying furnace for producing rubber sheets by the liquid phase method according to claim 1, characterized in that: The pulp distributing machine (2) comprises a pulp pool (2-1), a wave reduction plate (2-2), a pulp distributing buffer plate (2-3) and a mounting frame (2-4); a weir outflow outlet is formed on one side of the pulp pool (2-1); an inclined flow guide plate (2-1-1) is provided at a position of the pulp pool (2-1) corresponding to the weir outflow outlet; the pulp pool (2-1) is arranged on the mounting frame (2-4); the wave reduction plate (2-2) is arranged inside the pulp pool (2-1); a continuous pulp flow channel is formed between the wave reduction plate (2-2) and the bottom of the pulp pool (2-1) and the weir outflow outlet; both sides of the pulp distributing buffer plate (2-3) are folded upwards; the upper end of the pulp distributing buffer plate (2-3) is rotatably connected to the pulp pool (2-1) and docked with the inclined flow guide plate (2-1-1); the bottom is movably connected to the mounting frame (2-4) and the inclination angle of the pulp distributing buffer plate (2-3) is adjustable.

3. The vacuum microwave drying furnace for producing rubber sheets by the liquid phase method according to claim 1, characterized in that: The laser defoaming machine (3) is arranged adjacent to the pulp dispensing machine (2) and installed on the top of the industrial microwave oven (1); a laser beam transmission window is provided on the top of the industrial microwave oven (1) at a location corresponding to the installation position of the laser defoaming machine (3).

4. The vacuum microwave drying furnace for producing rubber sheets by the liquid phase method according to claim 1, characterized in that: The industrial microwave oven (1) is provided with openable oven doors (1-1) at both ends, and a plurality of openable side doors (1-2) are provided at intervals along the length direction on the side. The side doors (1-2) are provided with windows (1-3) whose inner surfaces can be wiped in a closed state.

5. The vacuum microwave drying furnace for producing rubber sheets by the liquid phase method according to claim 1, characterized in that: The conveyor belt system comprises a conveyor belt (5), a head wheel (6), a tail wheel (7), a plurality of conveyor belt support plates (8), a plurality of conveyor belt rollers (9) and a gravity tensioning mechanism (10); the head and tail ends of the conveyor belt (5) are respectively mounted on the head wheel (6) and the tail wheel (7) and the tension is adjusted by the gravity tensioning mechanism (10); a plurality of conveyor belt support plates (8) are arranged at intervals at the front section of the conveyor belt system to support the upper layer of the conveyor belt (5); and the plurality of conveyor belt rollers (9) are arranged at intervals at the bottom of the upper layer of the conveyor belt (5) to support the conveyor belt (5).

6. The vacuum microwave drying furnace for producing rubber sheets by the liquid phase method according to claim 1, characterized in that: Microwave suppressors (11) are respectively arranged near the head and the tail end of the transmission belt (5) inside the industrial microwave oven (1).

7. The vacuum microwave drying furnace for producing rubber sheets by the liquid phase method according to claim 1, characterized in that: The industrial microwave oven (1) is provided with a vacuum tube (12), and the vacuum tube (12) is connected to the internal furnace cavity of the industrial microwave oven (1) at intervals along the length direction.

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