CN103528704A - Online control device and online control method for hot pressing procedure of artificial board - Google Patents
Online control device and online control method for hot pressing procedure of artificial board Download PDFInfo
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Abstract
The invention discloses an online control device and an online control method for a hot pressing procedure of an artificial board. A thermoelectric couple is implanted into a core of an artificial board blank on line; the other end of the thermoelectric couple and the input end of a signal amplifier are connected in series; the output end of the signal amplifier is connected with a data displayer; a hydraulic control system and a temperature control system are respectively connected with the output end of a hot pressing process operating system, and the input end of the hot pressing process operating system and the output end of the signal amplifier are connected to form an online feedback control system; the core temperature of the artificial board during the hot pressing procedure can be acquired on line in real time, and online self-adaption closed loop feedback is performed on the hydraulic control system and the temperature control system by the hot pressing process operating system, and further, the hot pressing process of the artificial board is adjusted in real time. Online real-time monitoring is realized on the core temperature of the artificial board by the online control device and the online control method for the hot pressing procedure of the artificial board disclosed by the invention, and therefore, the hot pressing process of the artificial board is favorably optimized, the quality stability and the production rate of a product are improved, and the production energy consumption is reduced.
Description
Technical field
The invention belongs to wood-based plate and manufacturing technology field thereof in industry of artificial boards, relate to a kind of hot pressing of artificial board On-line Control device and hot pressing On-Line Control Method thereof.
Background technology
The hot pressing of wood-based plate refers to that slab with adhesive is at certain temperature, pressure, in the time, complete the process of plank.Temperature is a key factor of hot pressing process, and it is curing that it progressively completes adhesive, makes the component units of sheet material inside compose an integral body.Wood-based plate is at hot pressing, heat passes to backing plate (while using backing plate) through heating platen plate face, and backing plate passes to slab top layer again, and then is progressively delivered to slab sandwich layer, there are close relationship hot pressing temperature and time, and the direct shadow of height of temperature is to pressing time and throughput rate.Temperature transmission is subject to type, plate kind, capacity of equipment, seeds, the mat moisture content of adhesive, the impact of the factor such as the thickness of plate, production environment (climate and weather).Because the heat transfer of wood-based plate is a very complicated process, not yet there are at present theory and model can predict exactly slab internal temperature, therefore, in hot pressing, to the online detection of board briquette, not only can effectively reduce hot pressing time, enhance productivity, save hot pressing energy consumption, can also effectively improve the quality stability of sheet material, especially to adopting the wood-based plates such as Recombined bamboo, Scrimber, container bottom board or bamboo wood cement formwork of cold and hot cold technique manufacture to seem particularly remarkable.But at present, existing wood-based plate press is only monitored the temperature of heating platen, lacking a kind of device can carry out on-line monitoring to the core layer temperature of wood-based plate, and in real time hot pressing is implemented in to line traffic control according to the data that obtain.
Summary of the invention
The object of the invention is in order to overcome the deficiencies in the prior art, a kind of hot pressing of artificial board On-line Control device is provided, can pass through on-line monitoring artificial board blank core layer temperature, and according to the on-line automatic adjustment hot pressing parameters of core layer temperature.
For achieving the above object, the present invention takes following technical scheme:
A kind of hot pressing of artificial board On-line Control device provided by the invention, comprise hot-pressing system (1), hydraulic control system (2), temperature control system (3), heat pressing process operating system (4), data display equipment (5), signal amplifier (6) and thermopair (7), wherein: thermopair (7) other end is connected with the input end of signal amplifier (6); The output terminal connection data display (5) of signal amplifier; Hydraulic control system (3) is connected with hot-pressing system (1) with temperature control system (2) output terminal, input end is connected with heat pressing process operating system (4), the input end of heat pressing process operating system (4) is connected with the output terminal of signal amplifier (6), and is connected with the input end of data display equipment (5); Described thermopair (7) is movably.
Described signal amplifier (6) is, the amplifying circuit (II) of heat pressing process operating system (4) and positive-negative power circuit (III) form by connecting the temperature-compensation circuit (I) of thermopair (7), wherein the output line of temperature-compensation circuit (I) connects respectively in amplifying circuit (II) reverse input end and input end in the same way, the power input of temperature-compensation circuit (I) power supply input positive-negative power circuit (III), the output line of positive-negative power (III) is accepted amplifying circuit (II), as its power supply input.
The temperature sensor of described thermopair (7) is K (CA) NiCr/NiAl alloy thermopair, and the surface insulation body of described thermopair (7) is Teflon.
Described heat pressing process operating system (4) is program operation or operation manually automatically.
Another object of the present invention is to provide a kind of hot pressing of artificial board On-Line Control Method, comprises the steps:
A is by wood-based plate hot pressing parameters input heat pressing process operating system (4);
B implants thermopair (7) sandwich layer of artificial board blank, and described thermopair is sent in hot-pressing system (1) together with artificial board blank;
C opens heat pressing process operating system (4), and described heat pressing process operating system (4) is to hydraulic control system (3) input closure signal, and the hot press in hot-pressing system (1) starts closure; Meanwhile, described heat pressing process operating system (4) is to temperature control system (2) input intensification signal, and boiler starts to the hot press input heat energy in hot-pressing system (1), and the heating platen of described hot press starts to heat up;
D thermopair (7) starts to gather Atmospheric temperature, and be translated into the voltage signal of millivolt level, this voltage signal becomes the voltage signal of 0-5V through signal amplifier (6), the voltage signal of this 0-5V is divided into two-way, heat pressing process operating system (4) is defeated by one tunnel, and another road is defeated by data display equipment (5) and is processed and show numerical value and/or waveform;
E heat pressing process operating system (4) is by the voltage signal sent here of judgement amplifier (6), and hot pressing parameters described in integrating step A, to hydraulic control system (3) output control signal, regulation and control hot pressing pressure; To temperature control system (2) output control signal, regulation and control hot pressing temperature;
F is when completing the hot pressing flow process of hot pressing parameters regulation, and heat pressing process operating system (4) is opened control signal to hydraulic control system (3) output, and the hot press in hot-pressing system (1) is opened, and hot pressing completes.
Described heat pressing process operating system (4) is program operation or operation manually automatically.
The changing value of described signal amplifier (6) wood-based plate core layer temperature of interocclusal record during with every 0.25-0.5s.
Described data display equipment (5) is furnished with data acquisition software, gathers data value and/or the curve image of intensification, insulation and the temperature-fall period record of wood-based plate sandwich layer in hot pressing.
The temperature sensor of described thermopair (7) is K (CA) NiCr/NiAl alloy thermopair, and the surface insulation body of described thermopair (7) is Teflon.
A kind of hot pressing of artificial board On-line Control device provided by the invention and hot pressing On-Line Control Method thereof, be provided with movably thermopair, when hot pressing, the online sandwich layer of implanting wood-based plate, utilize the millivolt magnitude voltage signals of Seebeck effect (Seebeck effect) generation of K (CA) NiCr/NiAl alloy thermopair, this voltage signal becomes the voltage signal of 0-5V through signal amplifier, and process by data display equipment, demonstrate the temperature of slab sandwich layer, realized the on-line monitoring to hot pressing of artificial board core layer temperature.
A kind of hot pressing of artificial board On-line Control device provided by the invention and hot pressing On-Line Control Method thereof, input heat pressing process operating system after the electric signal that thermopair is gathered amplifies by signal amplifier, heat pressing process operating system is according to the temperature of sandwich layer, the hot pressing temperature of sheet material, hot pressing pressure and hot pressing time are carried out to real-time monitoring, meeting under the curing condition of adhesive, select to optimize applicable temperature and time, contribute to enhance productivity and reduce energy consumption.
Below in conjunction with the drawings and specific embodiments, the invention will be further described, limitation of the present invention not, every any this area of carrying out according to the disclosure of invention be equal to replacement, all belong to protection scope of the present invention.
Accompanying drawing explanation
The structure connection diagram of Fig. 1 hot pressing of artificial board On-line Control device
The circuit theory connection layout of Fig. 2 signal amplifier
Embodiment:
The embodiment cold and hot cold technique hot pressing On-line Control device of 1 multi-daylight press and On-Line Control Method thereof
Cold and hot cold technique hot pressing On-line Control device provided by the invention is by hot-pressing system (1), hydraulic control system (2), temperature control system (3), heat pressing process operating system (4), data display equipment (5), signal amplifier (6) and thermopair (7) form, as shown in Figure 1-2, and wherein:
Hot-pressing system (1) comprises multi-daylight press, loading, unloading plate machine, caul circulating system unit, hydraulic means, the air inlet and outlet device of steam, water-cooling apparatus, described loader, hot press, unloader and caul circulating system unit form a circulation system, belong to prior art;
Hydraulic control system (2) is the pressure source of hot press and loader and unloader, by 3 oil piping systems independently separately, controlling respectively lifting, closure, the pressurization of hot press, the lifting of loader, the lifting that declines, enters plate and unloader, decline, ejecting plate, belong to prior art;
Temperature control system (3) comprises air inlet and outlet device and the water-cooling apparatus of steam, and air inlet and outlet device, for hot press work provides thermal source, comprises air inlet column jecket, exhaust column jecket, metal hose or the ell of cranking arm, heating platen and all kinds of valve; Cooling device connects a water pipe in air inlet column jecket upper end, water inlet pipe is connected with water pump, connects an exhaust water pipe in gas outlet upper end, and exhaust water pipe can directly enter water in circulating water pool, belongs to prior art.The object of cooling device is for preventing that sheet material is at stress-relief process bubbling, when hot pressing completes, need to carry out heating platen coolingly nearly, and cooling common employing water-cooling pattern, makes artificial board blank cooling;
Heat pressing process operating system (4) is program operation or operation manually automatically;
The temperature sensor of thermopair is K (CA) NiCr/NiAl alloy thermopair, and surface insulation body is Teflon.
Signal amplifier (6) is, the amplifying circuit (II) of heat pressing process operating system (4) and positive-negative power circuit (III) form by connecting the temperature-compensation circuit (I) of thermopair (7), wherein the output line of temperature-compensation circuit (I) connects respectively in amplifying circuit (II) reverse input end and input end in the same way, the power input of temperature-compensation circuit (I) power supply input positive-negative power circuit (III), the output line of positive-negative power (III) is accepted amplifying circuit (II), as its power supply input.
Data display equipment (5) is furnished with data acquisition software, gathers data value and/or the curve image of intensification, insulation and the temperature-fall period record of wood-based plate sandwich layer in hot pressing.
Thermopair (7) other end is connected with the input end of signal amplifier (6); The output terminal connection data display (5) of signal amplifier; Hydraulic control system (3) is connected with hot-pressing system (1) with temperature control system (2) output terminal, input end is connected with heat pressing process operating system (4), the input end of heat pressing process operating system (4) is connected with the output terminal of signal amplifier (6), and is connected with the input end of data display equipment (5); Described thermopair (7) is movably.
Below the hot pressing On-Line Control Method of the embodiment of the present invention is described in detail again:
Adopt cold and hot cold explained hereafter Recombined bamboo, Scrimber, container bottom board or bamboo wood cement formwork, its hot pressing parameters: hot pressing pressure 4.0MPa, heating platen temperature 60 C during dress plate, during hot pressing, Atmospheric temperature is 145 ℃, sandwich layer temperature retention time 10min, the temperature 60 C of slab sandwich layer during release, by above-mentioned hot pressing parameters input heat pressing process operating system (4);
Recombined bamboo, Scrimber, container bottom board or bamboo wood cement formwork slab are sent into into plate machine, K (CA) NiCr/NiAl alloy thermopair (7) is implanted to the central layer of Recombined bamboo, Scrimber, container bottom board or bamboo wood cement formwork, afterwards, described thermopair (7) is sent between hot press heating platen together with Recombined bamboo, Scrimber, container bottom board or bamboo wood cement formwork slab; Open heat pressing process operating system (4), heat pressing process operating system (4) is to hydraulic control system (3) input closure signal, and hot-pressing system (1) starts closed, when pressure reaches 4.0MPa, keeps pressure constant; Simultaneously, described heat pressing process operating system (4) is to temperature control system (2) input intensification signal, boiler starts to hot-pressing system (1) input superheated vapor, the heating platen of described hot-pressing system (1) starts to heat up: thermopair (7) starts to gather Atmospheric temperature, and be translated into the voltage signal of millivolt level, this voltage signal becomes the voltage signal of 0-5V through signal amplifier (6), the voltage signal of this 0-5V is divided into two-way, heat pressing process operating system (4) is defeated by one tunnel, and another road is defeated by data display equipment (5) and is processed and show numerical value and/or waveform;
When the Atmospheric temperature of thermopair (7) collection reaches 145 ℃, heat pressing process operating system (4) is to temperature control system (2) output steam regulation amount signal, air inlet-outlet device is by regulating the air inflow of gas admittance valve, make the core layer temperature of slab remain on 145 ℃ of left and right, temperature retention time 10min; Afterwards, heat pressing process operating system (4), to temperature control system (2) output open cold radiator cooler signal, is closed gas admittance valve, and open cold radiator cooler, passes into cold water simultaneously, makes slab start cooling; When the temperature of slab sandwich layer drops to 60 ℃, heat pressing process operating system (4), to temperature control system (2) output adjustment signal, is closed cooling device; Heat pressing process operating system (4) is to hydraulic control system (3) output control signal, and hot press is opened and opened, thus unloader slab press is deviate from, hot pressing completes.Embodiment 2 multi-daylight press hot thermal process hot pressing On-line Control device and On-Line Control Method thereof
The hot thermal process hot pressing of multi-daylight press provided by the invention On-line Control device is by hot-pressing system (1), hydraulic control system (2), temperature control system (3), heat pressing process operating system (4), data display equipment (5), signal amplifier (6) and thermopair (7) form, as shown in Figure 1-2, and wherein:
Hot-pressing system (1) comprises multi-daylight press, loading, unloading plate machine, caul circulating system unit, and hydraulic means, the air inlet and outlet device of steam, described loader, hot press, unloader and caul circulating system unit form the circulation system of, belong to prior art;
Hydraulic control system (2) is the pressure source of hot press and loader and unloader, by 3 oil piping systems independently separately, controlling respectively lifting, closure, the pressurization of hot press, the lifting of loader, the lifting that declines, enters plate and unloader, decline, ejecting plate, belong to prior art;
Temperature control system (3) comprises that the air inlet and outlet device of steam or conduction oil enter arranging device, air inlet and outlet device or conduction oil enter arranging device for hot press work provides thermal source, comprise air inlet or oil-feed column jecket, exhaust or oil extraction column jecket, metal hose or the ell of cranking arm, heating platen and all kinds of valve;
Heat pressing process operating system (4) is program operation or operation manually automatically;
The temperature sensor of thermopair is K (CA) NiCr/NiAl alloy thermopair, and surface insulation body is Teflon.
Signal amplifier (6) is, the amplifying circuit (II) of heat pressing process operating system (4) and positive-negative power circuit (III) form by connecting the temperature-compensation circuit (I) of thermopair (7), wherein the output line of temperature-compensation circuit (I) connects respectively in amplifying circuit (II) reverse input end and input end in the same way, the power input of temperature-compensation circuit (I) power supply input positive-negative power circuit (III), the output line of positive-negative power (III) is accepted amplifying circuit (II), as its power supply input.
Data display equipment (5) is furnished with data acquisition software, gathers data value and/or the curve image of intensification, insulation and the temperature-fall period record of wood-based plate sandwich layer in hot pressing.
Thermopair (7) other end is connected with the input end of signal amplifier (6); The output terminal connection data display (5) of signal amplifier; Hydraulic control system (3) is connected with hot-pressing system (1) with temperature control system (2) output terminal, input end is connected with heat pressing process operating system (4), the input end of heat pressing process operating system (4) is connected with the output terminal of signal amplifier (6), and is connected with the input end of data display equipment (5); Described thermopair (7) is movably.
Below the plywood hot-pressing process On-Line Control Method of the embodiment of the present invention is described in detail again:
Adopt hot thermal process to produce scale board, its hot pressing parameters: hot pressing pressure 2.0MPa, during hot pressing, core layer temperature is 120 ℃, and sandwich layer temperature retention time 5min, by above-mentioned hot pressing parameters input heat pressing process operating system (4);
Scale board slab is sent into into plate machine, K (CA) NiCr/NiAl alloy thermopair (7) is implanted to the central layer of scale board, afterwards, described thermopair (7) is sent between hot press heating platen together with scale board slab; Open heat pressing process operating system (4), heat pressing process operating system (4) is to hydraulic control system (3) input closure signal, and hot-pressing system (1) starts closed, when pressure reaches 1.5MPa, keeps pressure constant; Meanwhile, described heat pressing process operating system (4) is to temperature control system (2) input intensification signal, and boiler starts to hot-pressing system (1) input superheated vapor, and the heating platen of described hot-pressing system (1) starts to heat up; Thermopair (7) starts to gather Atmospheric temperature, and be translated into the voltage signal of millivolt level, this voltage signal becomes the voltage signal of 0-5V through signal amplifier (6), the voltage signal of this 0-5V is divided into two-way, heat pressing process operating system (4) is defeated by one tunnel, and another road is defeated by data display equipment (5) and is processed and show numerical value and/or waveform;
When the Atmospheric temperature of thermopair (7) collection reaches 120 ℃, heat pressing process operating system (4) is to temperature control system (2) output steam regulation amount signal, air inlet-outlet device is by regulating the air inflow of gas admittance valve, make the core layer temperature of slab remain on 120 ℃ of left and right, temperature retention time 5min; Afterwards, heat pressing process operating system (4) is opened control signal to hydraulic control system (3) output, and hot-pressing system (1) is opened, thus unloader slab press is deviate from, hot pressing completes.
Below the fiberboard hot pressing On-Line Control Method of the embodiment of the present invention is described in detail again:
Adopt hot thermal process to produce urea-formaldehyde resin fibre plate, its hot pressing parameters: initial hot pressing pressure 1.5MPa, when core layer temperature reaches 100 ℃, hot pressing pressure is adjusted into 3.0MPa, and when hot pressing, core layer temperature is 140 ℃, hot pressing pressure is adjusted into 2.0MPa, when hot pressing, core layer temperature is 160 ℃, and hot pressing pressure is adjusted into 1.5MPa, and keeps temperature and pressure constant, insulation and temperature retention time 2min, by above-mentioned hot pressing parameters input heat pressing process operating system (4);
Fiberboard slab is sent into into plate machine, K (CA) NiCr/NiAl alloy thermopair (7) is implanted to the central layer of fiberboard, afterwards, described thermopair (7) is sent between hot press heating platen together with fiberboard slab; Open heat pressing process operating system (4), to temperature control system (2) input intensification signal, boiler starts to input to hot-pressing system (1) conduction oil of heating, and the heating platen of described hot-pressing system (1) starts to heat up; Meanwhile, heat pressing process operating system (4) is to hydraulic control system (3) input closure signal, and hot-pressing system (1) starts closed, when pressure reaches 1.5MPa, before upper once pressure regulation, keeps pressure constant;
When opening heat pressing process operating system (4), thermopair (7) starts to gather Atmospheric temperature, and be translated into the voltage signal of millivolt level, this voltage signal becomes the voltage signal of 0-5V through signal amplifier (6), the voltage signal of this 0-5V is divided into two-way, heat pressing process operating system (4) is defeated by one tunnel, and another road is defeated by data display equipment (5) and is processed and show numerical value and/or waveform; When core layer temperature reaches 100 ℃, heat pressing process operating system (4), to hydraulic control system (3) output adjustment signal, is adjusted into 2.0MPa by hot pressing pressure, before upper once pressure regulation, keeps pressure constant; When hot pressing, core layer temperature is 160 ℃, and heat pressing process operating system (4) is to hydraulic control system (3) output adjustment signal, and hot pressing pressure is adjusted into 1.5MPa, before upper once pressure regulation, keeps pressure constant; When hot pressing, core layer temperature is 160 ℃, and heat pressing process operating system (4) is to hydraulic control system (3) output adjustment signal, and hot pressing pressure is adjusted into 1.5MPa; Simultaneously, heat pressing process operating system (4) temperature control system (2) output adjustment signal, enters oil discharging device by regulating the oil inlet quantity of gas admittance valve, makes the core layer temperature of slab remain on 160 ℃ of left and right, before upper once pressure regulation, keep pressure constant, insulation and dwell time 2min, afterwards, heat pressing process operating system (4) is to hydraulic control system (3) output control signal, hot press is opened, thus unloader slab press is deviate from, hot pressing completes.
Below the particieboard hot pressing On-Line Control Method of the embodiment of the present invention is described in detail again:
Adopt hot thermal process to produce phenolics particieboard, its hot pressing parameters: hot pressing pressure 3.0MPa, 180 ℃ of core layer temperatures, when core layer temperature reaches 180 ℃, after the constant maintenance of temperature and pressure 3min, release.By in above-mentioned hot pressing parameters input heat pressing process operating system (4), adopt operation manually;
Particle mat is sent into into plate machine, K (CA) NiCr/NiAl alloy thermopair (7) is implanted to the central layer of particieboard, afterwards, described thermopair (7) is sent between hot press heating platen together with particle mat; Open heat pressing process operating system (4), adopt mode manually to control hydraulic system, hot press starts closure; Meanwhile, adopt mode manually to control temperature control system (2) unlatching air intake valve, boiler starts to hot press input superheated vapor, and the heating platen of hot press starts to heat up; Thermopair (7) starts to gather Atmospheric temperature, and be translated into the voltage signal of millivolt level, this voltage signal becomes the voltage signal of 0-5V through signal amplifier (6), the voltage signal of this 0-5V is divided into two-way, heat pressing process operating system (4) is defeated by one tunnel, and another road is defeated by data display equipment (5) and is processed and show numerical value and/or waveform;
When pressure reaches 3.0MPa, adopt mode regulator solution pressing system manually, make hot press pressure remain on 3.0MPa; When the Atmospheric temperature of thermopair (7) collection reaches 180 ℃, adopt the air inflow of mode regulating and controlling temperature control system (2) gas admittance valve valve manually, make the core layer temperature of slab remain on 180 ℃ of left and right, temperature retention time 3min; Afterwards, adopt mode manually to open hydraulic control system (3) start signal, hot press (1) is opened, thus unloader slab hot press is deviate from, hot pressing completes.
Claims (9)
1. a hot pressing of artificial board On-line Control device, comprise hot-pressing system (1), hydraulic control system (2), temperature control system (3), heat pressing process operating system (4), data display equipment (5), signal amplifier (6) and thermopair (7), is characterized in that: thermopair (7) other end is connected with the input end of signal amplifier (6); The output terminal connection data display (5) of signal amplifier; Hydraulic control system (3) is connected with hot-pressing system (1) with temperature control system (2) output terminal, input end is connected with heat pressing process operating system (4), the input end of heat pressing process operating system (4) is connected with the output terminal of signal amplifier (6), and is connected with the input end of data display equipment (5); Described thermopair (7) is movably.
2. a kind of hot pressing of artificial board On-line Control device according to claim 1, it is characterized in that: described signal amplifier (6) is by the temperature-compensation circuit (I) that connects thermopair (7), the amplifying circuit (II) of heat pressing process operating system (4) and positive-negative power circuit (III) form, wherein the output line of temperature-compensation circuit (I) connects respectively in amplifying circuit (II) reverse input end and input end in the same way, the power input of temperature-compensation circuit (I) power supply input positive-negative power circuit (III), the output line of positive-negative power (III) is accepted amplifying circuit (II), as its power supply input.
3. a kind of hot pressing of artificial board On-line Control device according to claim 1, is characterized in that: the temperature sensor of described thermopair (7) is K (CA) NiCr/NiAl alloy thermopair, and the surface insulation body of described thermopair (7) is Teflon.
4. a kind of hot pressing of artificial board On-line Control device according to claim 1, is characterized in that: described heat pressing process operating system (4) is program operation or operation manually automatically.
5. a hot pressing of artificial board On-Line Control Method, is characterized in that: comprise the steps:
A is by wood-based plate hot pressing parameters input heat pressing process operating system (4);
B implants thermopair (7) sandwich layer of artificial board blank, and described thermopair is sent in hot-pressing system (1) together with artificial board blank;
C opens heat pressing process operating system (4), and described heat pressing process operating system (4) is to hydraulic control system (3) input closure signal, and the hot press in hot-pressing system (1) starts closure; Meanwhile, described heat pressing process operating system (4) is to temperature control system (2) input intensification signal, and boiler starts to described hot press input heat energy, and the heating platen of described hot press starts to heat up;
D thermopair (7) starts to gather Atmospheric temperature, and be translated into the voltage signal of millivolt level, this voltage signal becomes the voltage signal of 0-5V through signal amplifier (6), the voltage signal of this 0-5V is divided into two-way, heat pressing process operating system (4) is defeated by one tunnel, and another road is defeated by data display equipment (5) and is processed and show numerical value and/or waveform;
E heat pressing process operating system (4) is by the voltage signal sent here of judgement amplifier (6), and hot pressing parameters described in integrating step A, to hydraulic control system (3) output control signal, regulation and control hot pressing pressure; To temperature control system (2) output control signal, regulation and control hot pressing temperature;
F is when completing the hot pressing flow process of hot pressing parameters regulation, and heat pressing process operating system (4) is opened control signal to hydraulic control system (3) output, and the hot press of hot-pressing system (1) is opened, and hot pressing completes.
6. a kind of hot pressing of artificial board On-Line Control Method according to claim 5, is characterized in that: described heat pressing process operating system (4) is program operation or operation manually automatically.
7. a kind of hot pressing of artificial board On-Line Control Method according to claim 5, is characterized in that: the changing value of described signal amplifier (6) wood-based plate core layer temperature of interocclusal record during with every 0.25-0.5s.
8. a kind of hot pressing of artificial board On-Line Control Method according to claim 5, it is characterized in that: described data display equipment (5) is furnished with data acquisition software, gather data value and/or the curve image of intensification, insulation and the temperature-fall period record of wood-based plate sandwich layer in hot pressing.
9. a kind of hot pressing of artificial board On-Line Control Method according to claim 5, is characterized in that: the temperature sensor of described thermopair (7) is K (CA) NiCr/NiAl alloy thermopair, and the surface insulation body of described thermopair (7) is Teflon.
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| CN104833441A (en) * | 2015-05-29 | 2015-08-12 | 江苏农林职业技术学院 | Online monitoring device and method for temperature change rule of high-frequency and routine hot-pressing wood-based plate slabs |
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