Plate microwave heating curing method and plate

Abstract

A plate microwave heating curing method, comprising the following steps: conveying a plate to be cured to a first residual wave absorption cavity (11), the first residual wave absorption cavity (11) collecting unabsorbed residual microwaves in a microwave curing cavity (12), and using the residual microwaves to carry out pre-curing treatment on said plate to obtain a first plate; conveying the first plate to the microwave curing cavity (12), and the microwave curing cavity (12) heating the first plate for curing to obtain a second plate; and conveying the second plate to a second residual wave absorption cavity (14), the second residual wave absorption cavity (14) collecting unabsorbed residual microwaves in the microwave curing cavity (12), and using the residual microwaves to carry out heat preservation treatment on the second plate at a heat preservation temperature to complete curing.

Description

A plate microwave heating curing method and a plate Technical Field

[0001] The present invention relates to the field of plate production and manufacturing, and in particular to a plate microwave heating and curing method and a plate. Background Art

[0002] Artificial quartz stone is composed of natural quartz, pigments, resins, and other additives that adjust bonding and curing. It is a plate made by mixing the raw materials, pressing and forming them under negative pressure, high-frequency vibration, and then heating and curing.

[0003] The current method for curing artificial quartz slabs by heating them is to transport the pressed quartz slabs to an insulated box and stack them. Heating in the insulated box is accomplished in two ways: using a fan for circulation; or using electrically heated high-temperature oil piped into the insulated box to heat the slabs using a heat exchanger.

[0004] The existing heating curing method has the following problems:

[0005] 1) The heating speed is slow, and the heating and curing time of each sheet exceeds 40 minutes;

[0006] 2) Low heating efficiency. The existing heating method has a large heat loss, resulting in an actual thermal efficiency of only 30%-40%;

[0007] 3) The production process is complex, requires a lot of equipment, and is costly. In order to meet the production cycle, the existing heating method requires multiple sheets to be stacked together for curing, which increases the complexity of the production process and also adds a lot of auxiliary equipment, increasing equipment costs.

[0008] 4) The existing heating method has too many control points, which is not conducive to achieving automatic control and saving labor costs.

[0009] Summary of the Invention

[0010] The technical problem to be solved by the present invention is to provide a microwave heating and curing method for a plate, which has high heat utilization rate and short curing time, and is conducive to improving the production efficiency of the plate.

[0011] The technical problem to be solved by the present invention is also to provide a board with a short curing time and low manufacturing cost.

[0012] In order to solve the above problems, the present invention provides a method for curing a plate by microwave heating, comprising the following steps:

[0013] The plate to be cured is conveyed to a first after-wave absorption chamber. The first after-wave absorption chamber collects the residual microwaves not absorbed in the microwave curing chamber and uses the residual microwaves to pre-curing the plate to be cured. When the temperature of the first after-wave absorption chamber rises to the pre-curing temperature, a first plate is obtained.

[0014] The first plate is transported to a microwave curing chamber, and the microwave curing chamber heats and cures the first plate. When the temperature of the microwave curing chamber reaches the curing temperature, a second plate is obtained.

[0015] The second plate is transported to the second wave absorbing cavity, which collects the microwave residue that is not absorbed in the microwave curing cavity. The second wave absorbing cavity uses the microwave residue to perform insulation treatment on the second plate at an insulation temperature, and the curing is completed after the insulation treatment.

[0016] In one embodiment, the frequency range of the microwaves generated in the microwave curing cavity is 2000 MHz to 3000 MHz;

[0017] The curing time in the microwave curing chamber is 2 minutes to 10 minutes.

[0018] In one embodiment, the curing temperature is 50°C to 100°C;

[0019] The pre-curing temperature is 20°C to 50°C;

[0020] The insulation temperature is 20°C to 50°C.

[0021] In one embodiment, the microwave curing chamber intermittently heats the first plate with a heating time of 30s to 60s and an interval time of 10s to 30s to obtain a second plate.

[0022] In one embodiment, the conveying speed of the conveyor belt is 0.1 m / s to 1 m / s;

[0023] The production line production cycle of the plate microwave heating curing method is 2 minutes per plate to 10 minutes per plate.

[0024] In one embodiment, the thickness of the plate to be cured is 10 mm to 50 mm.

[0025] In one embodiment, the first after-wave absorbing cavity, the microwave curing cavity and the second after-wave absorbing cavity are connected in sequence, the main body of the first after-wave absorbing cavity or the second after-wave absorbing cavity is a first shell, and the inner surface of the first shell is provided with a microwave absorbing material layer.

[0026] In one embodiment, a microwave absorbing material layer and a microwave reflecting material layer are sequentially provided on the inner surface of the microwave curing cavity.

[0027] In one embodiment, a microwave assembly is provided in the microwave curing cavity, and the microwave assembly includes a microwave generator, a waveguide tube, a uniformly distributed tube, and a horn feed port connected in sequence.

[0028] Correspondingly, the present invention also provides a plate material, which is manufactured using the above-mentioned plate material microwave heating and curing method.

[0029] The implementation of the present invention has the following beneficial effects:

[0030] The microwave heating and curing method for sheet materials provided herein utilizes microwaves to directly heat individual sheets within a microwave curing chamber, concentrating the heat source and accelerating curing time. A first after-wave absorption chamber is provided before the sheet enters the microwave curing chamber. This absorbs residual microwaves reflected from the microwave curing chamber and uses the residual waves to pre-cure the sheet materials. A second after-wave absorption chamber is provided after the sheet exits the microwave curing chamber. This second after-wave absorption chamber collects residual microwaves reflected from the microwave curing chamber and uses the residual waves to insulate the sheet materials. This arrangement improves the overall heat utilization rate to over 80%, significantly reducing energy consumption.

[0031] The microwave curing method provided by the present invention can reduce the curing time from over 40 minutes to less than 10 minutes, matching the production line's production cycle and improving production efficiency. Furthermore, the present invention enables continuous assembly line production, reducing the number of auxiliary equipment required for traditional sheet stacking and lowering manufacturing costs. Furthermore, the present invention requires significantly fewer control points than traditional methods, making it more conducive to automated control. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a flow chart of a microwave heating curing method for a plate according to the present invention;

[0033] FIG2 is a schematic structural diagram of the equipment used in the microwave heating curing method for a plate material of the present invention. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0035] The present invention provides a method for curing a plate by microwave heating, as shown in FIG1 , comprising the following steps:

[0036] S1. Conveying a plate to be cured to a first after-wave absorption chamber, wherein the first after-wave absorption chamber collects residual microwaves not absorbed in the microwave curing chamber and utilizes the residual microwaves to pre-curing the plate to be cured. When the temperature of the first after-wave absorption chamber rises to a pre-curing temperature, a first plate is obtained.

[0037] S2, conveying the first plate to a microwave curing chamber, wherein the microwave curing chamber heats and cures the first plate, and when the temperature of the microwave curing chamber reaches the curing temperature, a second plate is obtained;

[0038] S3. The second plate is transported to a second wave absorbing cavity. The second after-wave absorbing cavity collects the residual microwaves that are not absorbed in the microwave curing cavity. The residual microwaves are used to perform thermal insulation treatment on the second plate at a thermal insulation temperature. After the thermal insulation treatment, the curing is completed.

[0039] Specifically, compared with the existing heating and curing methods, the present invention uses microwaves in a microwave curing chamber to directly heat a single piece of plate individually. Microwave heating can quickly heat the stone material to the required temperature and directly transfer energy to the object without generating excess heat in the process. It can also achieve relatively uniform heating, avoiding local overheating or uneven heating problems, and making it easier to control the heating temperature and time to ensure a fast curing time and good curing effect.

[0040] In one embodiment, the microwaves generated in the microwave curing chamber have a frequency range of 2000 MHz to 3000 MHz; preferably, the microwaves generated in the microwave curing chamber have a frequency range of 2200 MHz to 2600 MHz. In one embodiment, the curing time in the microwave curing chamber is 2 minutes to 10 minutes; preferably, the curing time in the microwave curing chamber is 2 minutes to 5 minutes. The microwave heating curing method provided by the present invention can shorten the heating curing time from over 40 minutes to less than 10 minutes, matching the production line's production cycle and improving production efficiency.

[0041] The present invention incorporates a first after-wave absorption chamber before entering the microwave curing chamber. This chamber collects residual microwaves that are not absorbed within the chamber, effectively absorbing any residual microwaves that are reflected and leaked from the chamber. This after-wave absorption chamber can be used to pre-cure the sheet material. A second after-wave absorption chamber is provided after exiting the chamber. This chamber collects residual microwaves that are not absorbed within the chamber, effectively absorbing any residual microwaves that are reflected and leaked from the chamber. This after-wave absorption chamber can be used to insulate the sheet material. This arrangement improves the overall heat utilization rate to over 80%, significantly reducing energy consumption.

[0042] In one embodiment, the curing temperature is 50°C to 100°C; the pre-curing temperature is 20°C to 50°C; and the insulation temperature is 20°C to 50°C. Preferably, the curing temperature is 60°C to 90°C; the pre-curing temperature is 30°C to 40°C; and the insulation temperature is 30°C to 40°C. It should be noted that the pre-curing temperature of 20°C to 50°C refers to the temperature in the first after-wave absorption cavity, which is used for pre-curing; the insulation temperature of 20°C to 50°C refers to the temperature in the second after-wave absorption cavity, which is used for insulation.

[0043] The present invention utilizes the first aftermath absorption chamber for pre-curing, which can reduce curing time. Furthermore, by gradually increasing the material temperature, the internal stress generated during the curing process can be reduced, thereby reducing the risk of cracking and deformation of the material and increasing the stability and durability of the product. The present invention utilizes the second aftermath absorption chamber for insulation, ensuring uniform heating of the entire sheet, thereby reducing the potential for uneven curing during the curing process. Furthermore, by gradually decreasing the temperature, the internal stress generated during the cooling process can be reduced, helping to reduce the risk of cracking and deformation and increasing the stability and durability of the product.

[0044] In one embodiment, the microwave curing chamber intermittently heats the first plate, with a heating time of 30s to 60s and an interval time of 10s to 30s to obtain a second plate. Compared with continuous heating, the present invention adopts intermittent heating, which can more accurately control the temperature to ensure that the curing process is always within the required temperature range, reducing the risk of overheating or overcooling. Moreover, compared with continuous heating, intermittent heating can reduce overall energy consumption. Moreover, by setting a suitable interval time during the heating process, the internal stress generated during the curing process can be reduced, the risk of cracking and deformation of the material can be reduced, and the plate can be ensured to be uniformly cured during the heating cycle.

[0045] As mentioned above, the microwave heating and curing method provided by the present invention can shorten the heating and curing time from the original more than 40 minutes to less than 10 minutes. The present invention can further improve production efficiency by matching the production line production rhythm. In one embodiment, the conveying speed of the conveyor belt is 0.1m / s to 1m / s; the production line production rhythm of the plate microwave heating and curing method is 2min / plate to 10min / plate; the thickness of the plate to be cured is 10mm to 50mm. The present invention can realize a continuous assembly line production mode, realize automatic control throughout the process, reduce the auxiliary equipment of traditional stacked plates, improve production efficiency, and reduce manufacturing costs.

[0046] The schematic diagram of the structure of the equipment used in the microwave heating and curing method for sheet materials of the present invention is shown in Figure 2. The microwave heating and curing equipment includes a conveying device 15, above which are disposed a first after-wave absorbing cavity 11, a microwave curing cavity 12, and a second after-wave absorbing cavity 14, which are sequentially connected. A microwave assembly 13 is disposed within the microwave curing cavity 14, which generates microwaves to heat and cure the sheet material to be cured. The first after-wave absorbing cavity 11 collects the residual microwaves reflected from the microwave curing cavity 12 to pre-cure the sheet material to be cured, and the second after-wave absorbing cavity 14 collects the residual microwaves reflected from the microwave curing cavity 12 to keep the sheet material to be cured warm.

[0047] In one embodiment, a microwave absorbing material layer is provided on the inner surface of the first after-wave absorbing cavity 11 or the second after-wave absorbing cavity 14. This microwave absorbing material layer absorbs after-waves reflected and leaking from the microwave curing cavity, i.e., the residual microwaves that are not absorbed within the microwave curing cavity. In one embodiment, the microwave absorbing material layer has a thickness of 30 nm to 100 nm. Preferably, the microwave absorbing material layer has a thickness of 40 nm to 90 nm.

[0048] In one embodiment, the microwave component 13 includes a microwave generator, a waveguide tube, a uniformly distributed tube and a horn feed port connected in sequence. The microwave generator generates and transmits microwaves, the waveguide tube conducts the microwaves to the uniformly distributed tube, the uniformly distributed tube continuously reflects the microwaves and uniformly guides them into the horn feed port, and the horn feed port continuously reflects the microwaves and uniformly reflects them onto the microwave reflecting inner layer or plate. In one embodiment, the horn feed port is provided with a wave-transmitting hole passing through the horn feed port, and a reflective plate is provided inside the horn feed port. The wave-transmitting hole allows microwaves to pass through evenly distributed, and the reflective plate can increase the angle and number of microwave reflections, making them propagate more evenly. In one embodiment, the cross-sectional area × number of the wave-transmitting holes = the cross-sectional area of ​​the waveguide tube × (1±0.5). Preferably, the cross-sectional area × number of the wave-transmitting holes = the cross-sectional area of ​​the waveguide tube × (1±0.3), which can ensure that the microwaves are transmitted to the plate to be cured to the greatest extent, thereby increasing the curing speed.

[0049] In one embodiment, the inner surface of the microwave curing cavity 12 is sequentially provided with a microwave absorbing material layer and a microwave reflecting material layer. The microwave absorbing material layer absorbs the residual waves that penetrate the microwave reflecting inner layer, while the microwave reflecting inner layer reflects the microwaves emitted from the horn feed port, ensuring uniform irradiation of the plate. In one embodiment, the microwave reflecting material layer has a thickness of 2 nm to 5 nm. Preferably, the microwave reflecting material layer has a thickness of 3 nm to 4 nm.

[0050] Accordingly, the present invention also provides a plate material manufactured using the above-mentioned plate material microwave heating and curing method. The plate material has a significantly shortened curing time, high production efficiency, reduced energy consumption and labor costs, and helps reduce overall production costs.

[0051] The above disclosure is only a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for curing a plate by microwave heating, characterized in that: The following steps are involved: The plate to be cured is conveyed to a first after-wave absorption cavity, the first after-wave absorption cavity collects the residual microwaves that are not absorbed in the microwave curing cavity, and uses the residual microwaves to perform pre-curing treatment on the plate to be cured. When the temperature of the first after-wave absorption cavity rises to the pre-curing temperature, a first plate is obtained; The first plate is transported to a microwave curing chamber, and the microwave curing chamber heats and cures the first plate. When the temperature of the microwave curing chamber reaches the curing temperature, a second plate is obtained; The second plate is transported to a second after-wave absorption cavity, which collects the residual microwaves not absorbed in the microwave curing cavity, and uses the residual microwaves to perform insulation treatment on the second plate at an insulation temperature, and the curing is completed after the insulation treatment.

2. The method for curing a plate by microwave heating according to claim 1, characterized in that: The frequency range of the microwaves generated in the microwave curing cavity is 2000MHz to 3000MHz; The curing time in the microwave curing chamber is 2 minutes to 10 minutes.

3. The method for curing a plate by microwave heating according to claim 1, characterized in that: The curing temperature is 50°C to 100°C; The pre-curing temperature is 20°C to 50°C; The insulation temperature is 20°C to 50°C.

4. The method for curing a plate by microwave heating according to claim 1, characterized in that: The microwave curing chamber intermittently heats the first plate, the heating time is 30s to 60s, and the interval time is 10s to 30s, to obtain a second plate.

5. The method for curing a plate by microwave heating according to claim 1, characterized in that: The conveying speed of the conveyor belt is 0.1m / s to 1m / s; The production line production rhythm of the plate microwave heating curing method is 2 minutes / plate to 10 minutes / plate.

6. The method for curing a plate by microwave heating according to claim 1, characterized in that: The thickness of the plate to be cured is 10 mm to 50 mm.

7. The method for curing a plate by microwave heating according to claim 1, characterized in that: The first after-wave absorbing cavity, the microwave curing cavity and the second after-wave absorbing cavity are connected in sequence, the main body of the first after-wave absorbing cavity or the second after-wave absorbing cavity is a first shell, and the inner surface of the first shell is provided with a microwave absorbing material layer.

8. The method for curing a plate by microwave heating according to claim 1, characterized in that: The inner surface of the microwave curing cavity is provided with a microwave absorbing material layer and a microwave reflecting material layer in sequence.

9. The method for curing a plate by microwave heating according to claim 1, characterized in that: A microwave component is arranged in the microwave curing cavity, and the microwave component comprises a microwave generator, a waveguide tube, a uniformly distributed tube and a horn feed port which are connected in sequence.

10. A plate, characterized in that: The plate is manufactured by the plate microwave heating curing method as described in any one of claims 1 to 9.

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