CN108818874B - Fireproof sandwich body prepared by utilizing melamine impregnated paper - Google Patents
Fireproof sandwich body prepared by utilizing melamine impregnated paper Download PDFInfo
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- CN108818874B CN108818874B CN201810739095.7A CN201810739095A CN108818874B CN 108818874 B CN108818874 B CN 108818874B CN 201810739095 A CN201810739095 A CN 201810739095A CN 108818874 B CN108818874 B CN 108818874B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/007—Manufacture of substantially flat articles, e.g. boards, from particles or fibres and at least partly composed of recycled material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/20—Moulding or pressing characterised by using platen-presses
- B27N3/203—Moulding or pressing characterised by using platen-presses with heating or cooling means
Abstract
The invention discloses a fireproof sandwich body prepared by utilizing melamine impregnated paper, which mainly comprises melamine impregnated paper sheets, and the fireproof sandwich body is prepared by the following process steps: crushing, screening, stirring, humidifying, paving and hot pressing. According to the invention, the leftover waste in the melamine ecological plate is subjected to hot press molding, so that the accumulation and waste utilization of the leftover waste in the melamine ecological plate are reduced, the pressure and workload of environmental sanitation work are reduced, the fireproof sandwich body is manufactured by utilizing the leftover waste, the production cost is reduced, and the fireproof grade of the plate is improved.
Description
Technical Field
The invention belongs to the technical field of plate processing, and particularly relates to a fireproof sandwich body prepared by melamine impregnated paper.
Background
At present, the ecological plate is divided into two concepts of narrow sense and broad sense: 1) the ecological board is equivalent to a melamine laminated board in a broad sense, is called a melamine impregnated bond paper veneer artificial board, and is a decorative board formed by soaking paper with different colors or textures in an ecological board resin adhesive, drying to a certain curing degree, paving the paper on the surface of a shaving board, a moisture-proof board, a medium-density fiberboard, a plywood, a blockboard or other hard fiberboard and carrying out hot pressing; 2) the ecological board in the narrow sense only refers to a melamine veneer with a base material used in the middle being spliced solid wood (such as malachite, fir, tung wood, poplar and the like), and is mainly used in the fields of furniture, cabinets, wardrobes, bathroom cabinets and the like.
For the leftover waste of melamine impregnated paper in the production process of ecological plates, the waste is generated in a large amount every day, the waste is seriously accumulated, the leftover waste cannot be recycled and can only be treated as garbage, the pressure and the workload of environmental sanitation work are increased, the melamine impregnated paper is treated by a burning method usually, but the melamine impregnated paper cannot be fully burnt in the burning process, a large amount of black smoke is generated in the burning process, and the requirement on frequent cleaning in a hearth is increased.
For the melamine impregnated paper sheet, the melamine impregnated paper sheet is not formed in the hot pressing process, the steam pressure is higher than the gluing tension easily in the hot pressing process, and the melamine impregnated paper is crushed and separated when the hot press is opened, so that the recycling of the melamine impregnated paper is a technical problem in the plate industry and the melamine impregnated paper industry.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the fireproof sandwich body prepared by using the melamine impregnated paper, so that the accumulation of leftover waste in a melamine ecological plate is reduced, the waste is utilized, the pressure and the workload of environmental sanitation work are reduced, the fireproof sandwich body is prepared by using the leftover waste, the production cost is reduced, and the fireproof grade of the plate is improved.
In order to achieve the purpose, the invention adopts the technical scheme that:
a fireproof sandwich body prepared by utilizing melamine impregnated paper mainly comprises melamine impregnated paper sheets, and is prepared by the following process steps:
1) crushing, feeding the melamine impregnated paper in the bin into a crusher through a conveyor belt to crush, feeding the crushed melamine impregnated paper into a screening machine to screen, wherein the rotating speed of the crusher is 3000-5000 r/min;
2) screening, wherein a screening machine screens the crushed sheet bodies, and the diameter of a screen is 0.5-3 mm; the sheet bodies passing through the screen mesh enter a weighing platform through a conveyor belt to be weighed, and the separated sheet bodies return to the crusher through another conveyor belt to be crushed again;
3) stirring and humidifying, and accurately weighing the needed melamine impregnated paper sheet body and water according to the weight ratio of the melamine impregnated paper sheet body to the water of 8:1-12: 1; adding the weighed melamine impregnated paper sheet into a stirrer, stirring, and observing whether the melamine impregnated paper sheet is agglomerated or not in the stirring process, wherein if the agglomeration is observed, the stirring time is properly prolonged; after stirring without agglomeration, spraying and humidifying the melamine impregnated paper sheet body in the box body for 10-20 minutes to moisten the surface of the melamine impregnated paper sheet body;
4) paving, wherein the stirred and humidified melamine impregnated paper sheet body is conveyed into a pre-pressing template on a paving line through a conveying belt, and the thickness of the pavement in the pre-pressing template is 5mm-30 mm;
5) hot pressing, the thickness of the hot pressing molding is 1.5mm-18mm, the time of the hot pressing molding is 300-: the lower pressing plate is fixed, firstly, the lifting cylinder quickly releases pressure, when the upper pressing plate and the upper surface of the plate blank are 1-2cm, the pressure is slowly released to zero, then the plate blank is quickly pressurized by an eccentric automatically-adjusted plunger pump, the preset pressure is 1/2-2/3 of the highest pressure, the pre-pressing time is 10-50 seconds, the closing time is shortened, and the pre-cured layer is reduced; when the pressure reaches the preset pressure, the eccentric automatically-adjusted plunger pump continues to pressurize until the highest pressure is reached, and the pressure rise time is 200-500 seconds, so that the phenomenon that the closing speed is too high, the slab rebounds and the thickness of the slab cannot be effectively controlled is avoided; after the highest pressure is reached, the slab generates plastic deformation under the action of temperature and pressure, the resilience force is reduced, and along with the plastic deformation of the slab, the pressure of an oil path of the eccentric automatically-adjusted plunger pump is reduced by 5% -10% of the highest pressure; when the pressure is reduced to the lower limit pressure preset in the high-pressure section, the pressure control system sends a signal, the eccentric automatically-adjusted plunger pump pressurizes to the highest pressure again, the boosting time is 10-30 seconds, and the compression ratio of the plate blank is increased; repeating the steps until the pressure plate is closed to the thickness gauge position, wherein the time is the closing time;
B) maintaining the pressure at high pressure, wherein the time period of the pressure maintaining at high pressure is 10-20s after the pressure plate is closed;
C) the pressure is relieved in a segmented mode, the pressure relief is carried out in the following segments, and the contact between a pressure plate and a thickness gauge must be ensured in the pressure relief process; entering a T0 section, wherein the pressure is 1/3-1/2 of the highest pressure, and when the pressure relief time is 50-80 seconds, the plate blank begins to exhaust steam; after the T0 period, entering a T1 period of zero pressure of a pressurizing oil line, wherein the pressure relief time is 70-90 seconds, only the gravity of the pressing plate acts on the plate blank, the plate blank continues to exhaust steam, after the T1 period is finished, the upper pressing plate is lifted up, the gravity of the upper pressing plate still acts on the plate blank, and the pressure is maintained for 10-30 seconds under the pressure, so that the steam is continuously exhausted from the plate blank; and finally, lifting the upper pressing plate by the lifting cylinder, and unloading the plate blank out of the hot press by the conveyor belt.
Further, the fireproof sandwich body comprises a melamine impregnated paper sheet body and fibers, and the fireproof sandwich body comprises the following components in percentage by weight: 80-95% of melamine impregnated paper sheet body and 5-20% of fiber are prepared by crushing, screening, mixing, stirring, humidifying, paving and hot pressing; the material mixing comprises, by weight, 80-95 parts of melamine impregnated paper sheet bodies and 5-20 parts of fibers, which are fully stirred and mixed, and the materials are weighed after being mixed, wherein the hot-press forming thickness is 1.5-18 mm, and the hot-press forming time is 300-700 seconds.
Further, the fireproof sandwich body mainly comprises melamine impregnated paper sheets, fibers and an adhesive, and the fireproof sandwich body comprises the following components in percentage by weight: 2-20% of melamine impregnated paper sheet, 70-95% of fiber and 3-10% of adhesive, and the preparation method comprises the following steps of crushing, screening, mixing, stirring, glue injection, paving and hot pressing, wherein the melamine impregnated paper sheet, the fiber and the adhesive are fully stirred and mixed according to the parts by weight, and the melamine impregnated paper sheet, the fiber and the adhesive are weighed after mixing; the thickness of the hot-press molding is 1.5mm-18mm, and the time of the hot-press molding is 300-800 seconds;
stirring and injecting glue, namely adding the weighed mixture of the melamine impregnated paper sheet body and the fibers into a stirrer according to the parts by weight and 3-10 parts of adhesive, stirring, wherein the mixture is observed whether to have a caking phenomenon in the stirring process, and if the caking phenomenon is found, the stirring time is properly prolonged; after the mixture is stirred without agglomeration, spraying and adding glue to the mixture in the box, wherein the time for adding the glue to the glue is 10-20 minutes, so that the glue is attached to the surface of the mixture.
Further, the fireproof sandwich body mainly comprises melamine impregnated paper powder, an adhesive and fibers, the melamine impregnated paper sheet is crushed into powder according to the following weight percentage: 60-70% of melamine impregnated paper powder, 10-20% of adhesive and 20-30% of fiber, and the plasticity and toughness of the hot-pressed sandwich body can be enhanced by adding the fiber and the adhesive according to the proportion;
mixing 60-70 parts of melamine impregnated paper powder and 20-30 parts of fiber, fully stirring and mixing the materials according to parts by weight, and weighing the materials after mixing;
wherein, the stirring and the glue injection are carried out, and the glue injection is carried out according to 10 to 20 parts by weight of glue solution; adding the weighed mixture of the melamine impregnated paper powder and the fibers into a stirrer, stirring, wherein during the stirring process, whether the mixture is agglomerated or not is observed, and if the agglomeration is observed, the stirring time is properly prolonged; after stirring without agglomeration, spraying and adding glue to the mixture in the box body for 10-20 minutes to attach glue solution to the surface of the melamine impregnated paper powder.
Further, the fireproof sandwich body mainly comprises melamine impregnated paper powder and an adhesive, the melamine impregnated paper sheet body is crushed into powder by a crusher, and the melamine impregnated paper sheet body comprises the following components in percentage by weight: 80-90% of melamine impregnated paper powder and 10-20% of adhesive, and performing hot press molding through a hot press;
stirring and injecting glue, namely stirring 80-90 parts by weight of melamine impregnated paper powder, and injecting glue by 10-20 parts by weight of glue solution; adding the weighed melamine impregnated paper powder into a stirrer, stirring, and observing whether the melamine impregnated paper powder is agglomerated or not in the stirring process, wherein if the agglomeration is observed, the stirring time is properly prolonged; after stirring without agglomeration, spraying and adding glue to the mixture in the box body, wherein the glue adding time is 12 minutes, so that the glue solution is attached to the surface of the melamine impregnated paper powder.
Preferably, the fibers are one or more of wood fibers, glass fibers and polyester fibers, and the plasticity and the toughness of the fireproof sandwich body are enhanced.
Furthermore, the outer side of the fireproof sandwich body is provided with a decorative surface layer, and the fireproof sandwich body is beautified through the decorative surface layer.
Further, the outer side of the fireproof sandwich body is provided with a plurality of wood board layers, the outer side of each wood board layer is provided with a veneer layer, and each wood board layer is one or more of a poplar layer, a pine layer, a eucalyptus layer and a density fiberboard.
Preferably, the thickness of the wood board layer is 0.5-3 mm.
Preferably, the wood board layer is provided with a flame retardant.
Furthermore, the thickness of the formed plate made of the fireproof sandwich body is 2-25 mm.
Preferably, the fireproof sandwich body is arranged in a plurality of layers in the molding plate manufactured by the fireproof sandwich body, and a plurality of wood plate layers are arranged on the outer side of the fireproof sandwich body.
Compared with the prior art, the invention has the beneficial effects that:
1) through lower foot waste material hot briquetting in to the melamine ecological plate, reduce piling up of lower foot waste material in the melamine ecological plate, waste utilization reduces sanitation work's pressure and work load, utilizes lower foot waste material preparation fire prevention sandwich body, reduction in production cost improves the fire-proof rating of panel.
Detailed Description
The technical solutions of the present invention are further specifically described in order to facilitate understanding of those skilled in the art.
Example 1:
a fireproof sandwich body prepared by utilizing melamine impregnated paper mainly comprises melamine impregnated paper sheets, and is prepared by the following process steps:
1) crushing, feeding the melamine impregnated paper in the bin into a crusher through a conveyor belt for crushing, and feeding the crushed melamine impregnated paper into a screening machine for screening, wherein the rotating speed of the crusher is 3500 rpm;
2) screening, namely screening the crushed sheet bodies by using a screening machine, wherein the diameter of a screen is 2 cm; the sheet bodies passing through the screen mesh enter a weighing platform through a conveyor belt to be weighed, and the separated sheet bodies return to the crusher through another conveyor belt to be crushed again;
3) stirring and humidifying, and accurately weighing the needed melamine impregnated paper sheet body and water according to the weight ratio of the melamine impregnated paper sheet body to the water of 9: 1; adding the weighed melamine impregnated paper sheet into a stirrer, stirring, and observing whether the melamine impregnated paper sheet is agglomerated or not in the stirring process, wherein if the agglomeration is observed, the stirring time is properly prolonged; after stirring without agglomeration, spraying and humidifying the melamine impregnated paper sheet body in the box body for 12 minutes to moisten the surface of the melamine impregnated paper sheet body;
4) paving, wherein the stirred and humidified melamine impregnated paper sheet body is conveyed into a pre-pressing template on a paving line through a conveying belt, and the thickness of the pavement in the pre-pressing template is 20 mm;
5) hot pressing, the thickness of the hot-press molding is 12mm, the hot-pressing time is 600 seconds, the temperature is 120 ℃, A) the pressing is closed: the lower pressing plate is fixed, firstly, the lifting cylinder quickly releases pressure, when the upper pressing plate and the upper surface of the plate blank are 1-2cm, the pressure is slowly released to zero, then the plate blank is pressurized together through an eccentric automatically-adjusted plunger pump, the preset pressure is 1/2 of the highest pressure, the pre-pressing time is 30 seconds, the closing time is shortened, and the pre-cured layer is reduced; when the pressure reaches the preset pressure, the eccentric automatically-adjusted plunger pump continues to pressurize until the maximum pressure is reached, and the pressure rise time is 350 seconds, so that the phenomenon that the closing speed is too high, the slab rebounds and the thickness of the slab cannot be effectively controlled is avoided; after the maximum pressure is reached, the slab generates plastic deformation under the action of temperature and pressure, the resilience force is reduced, and along with the plastic deformation of the slab, the pressure of the oil path of the eccentric automatically-adjusted plunger pump is reduced by 7% of the maximum pressure; when the pressure is reduced to the lower limit pressure preset in the high-pressure section, the pressure control system sends a signal, the eccentric automatically-adjusted plunger pump pressurizes to the highest pressure again, the boosting time is 30 seconds, and the compression ratio of the plate blank is increased; repeating the steps until the pressure plate is closed to the thickness gauge position, wherein the time is the closing time;
B) high-pressure maintaining, wherein the time period of the high-pressure maintaining is 20s after the pressure plate is closed;
C) the pressure is relieved in a segmented mode, the pressure relief is carried out in the following segments, and the contact between a pressure plate and a thickness gauge must be ensured in the pressure relief process; entering a T0 section, wherein the pressure is 1/3 of the highest pressure, and when the pressure relief time is 70 seconds, the plate blank begins to exhaust steam; after the T0 period, entering a T1 period of zero pressure of a pressurizing oil line, wherein the pressure relief time is 80 seconds, only the gravity of the pressing plate acts on the plate blank, and the plate blank continues to exhaust steam, after the T1 period is finished, the upper pressing plate is lifted up to ensure that the gravity still acts on the plate blank, and the pressure is maintained for 20 seconds under the pressure so as to facilitate the continuous steam exhaust of the plate blank; and finally, lifting the upper pressing plate by the lifting cylinder, and unloading the plate blank out of the hot press by the conveyor belt.
Example 2:
a fireproof sandwich body prepared by utilizing melamine impregnated paper mainly comprises melamine impregnated paper sheets, and is prepared by the following process steps:
1) crushing, feeding the melamine impregnated paper in the bin into a crusher through a conveyor belt to crush, feeding the crushed melamine impregnated paper into a screening machine to screen, wherein the rotating speed of the crusher is 5000 r/min;
2) screening, namely screening the crushed sheet bodies by using a screening machine, wherein the diameter of a screen is 2 cm; the sheet bodies passing through the screen mesh enter a weighing platform through a conveyor belt to be weighed, and the separated sheet bodies return to the crusher through another conveyor belt to be crushed again;
3) stirring and humidifying, and accurately weighing the needed melamine impregnated paper sheet body and water according to the weight ratio of the melamine impregnated paper sheet body to the water of 8: 1; adding the weighed melamine impregnated paper sheet into a stirrer, stirring, and observing whether the melamine impregnated paper sheet is agglomerated or not in the stirring process, wherein if the agglomeration is observed, the stirring time is properly prolonged; after stirring without agglomeration, spraying and humidifying the melamine impregnated paper sheet body in the box body for 15 minutes to moisten the surface of the melamine impregnated paper sheet body;
4) paving, wherein the stirred and humidified melamine impregnated paper sheet body is conveyed into a pre-pressing template on a paving line through a conveying belt, and the thickness of the pavement in the pre-pressing template is 20 mm;
5) hot pressing, the thickness of the hot-press molding is 12mm, the hot-pressing time is 550 seconds, the temperature is 120 ℃, A) the pressurization is closed: the lower pressing plate is fixed, firstly, the lifting cylinder quickly releases pressure, when the upper pressing plate and the upper surface of the plate blank are 1-2cm, the pressure is slowly released to zero, then the plate blank is pressurized together through an eccentric automatically-adjusted plunger pump, the preset pressure is 2/3 of the highest pressure, the pre-pressing time is 20 seconds, the closing time is shortened, and the pre-cured layer is reduced; when the pressure reaches the preset pressure, the eccentric automatically-adjusted plunger pump continues to pressurize until the maximum pressure is reached, and the pressure rise time is 300 seconds, so that the phenomenon that the closing speed is too high, the slab rebounds and the thickness of the slab cannot be effectively controlled is avoided; after the maximum pressure is reached, the slab generates plastic deformation under the action of temperature and pressure, the resilience force is reduced, and along with the plastic deformation of the slab, the pressure of the oil path of the eccentric automatically-adjusted plunger pump is reduced by 5% of the maximum pressure; when the pressure is reduced to the lower limit pressure preset in the high-pressure section, the pressure control system sends a signal, the eccentric automatically-adjusted plunger pump pressurizes to the highest pressure again, the boosting time is 20 seconds, and the compression ratio of the plate blank is increased; repeating the steps until the pressure plate is closed to the thickness gauge position, wherein the time is the closing time;
B) high-pressure maintaining, wherein the time period of the high-pressure maintaining is 15s after the pressure plate is closed;
C) the pressure is relieved in a segmented mode, the pressure relief is carried out in the following segments, and the contact between a pressure plate and a thickness gauge must be ensured in the pressure relief process; entering a T0 section, wherein the pressure is 1/3 of the highest pressure, and when the pressure relief time is 80 seconds, the plate blank begins to exhaust steam; after the T0 period, the pressure is released for 85 seconds in a T1 period with zero pressure in a pressurizing oil line, only the gravity of the pressing plate acts on the plate blank, the plate blank continues to exhaust steam, after the T1 period is finished, the upper pressing plate is lifted up to ensure that the gravity still acts on the plate blank, and the pressure is maintained for 30 seconds under the pressure, so that the plate blank continues to exhaust steam; and finally, lifting the upper pressing plate by the lifting cylinder, and unloading the plate blank out of the hot press by the conveyor belt.
Example 3:
the fireproof sandwich body is mainly composed of 85% of melamine impregnated paper sheet bodies and 15% of fibers in percentage by weight, and is prepared by the following process steps:
1) crushing, feeding the melamine impregnated paper in the bin into a crusher through a conveyor belt for crushing, and feeding the crushed melamine impregnated paper into a screening machine for screening, wherein the rotating speed of the crusher is 4500 rpm;
2) screening, namely screening the crushed sheet bodies by using a screening machine, wherein the diameter of a screen is 2 cm; the sheet bodies passing through the screen mesh enter a weighing platform through a conveyor belt to be weighed, and the separated sheet bodies return to the crusher through another conveyor belt to be crushed again;
3) mixing, namely, according to the parts by weight, fully stirring and mixing 85 parts of melamine impregnated paper sheet bodies and 15 parts of fibers, and weighing after mixing;
4) stirring and humidifying, and accurately weighing the required mixture and water according to the weight ratio of the melamine impregnated paper sheet body to the mixture of the fibers to the water of 10: 1; adding the weighed mixture into a stirrer, stirring, observing whether the mixture is agglomerated or not in the stirring process, and if the agglomeration is found, properly prolonging the stirring time; after the mixture is stirred without agglomeration, the mixture in the box body is sprayed and humidified for 15 minutes, so that the surface of the mixture is moist;
5) paving, wherein the stirred and humidified mixture is conveyed into a pre-pressing template on a paving line through a conveying belt, and the thickness of the pavement in the pre-pressing template is 20 mm;
6) hot pressing, the thickness of the hot-press molding is 12mm, the hot-pressing time is 600 seconds, the temperature is 120 ℃, A) the pressing is closed: the lower pressing plate is fixed, firstly, the lifting cylinder quickly releases pressure, when the upper pressing plate and the upper surface of the plate blank are 1-2cm, the pressure is slowly released to zero, then the plate blank is pressurized together through an eccentric automatically-adjusted plunger pump, the preset pressure is 1/2 of the highest pressure, the pre-pressing time is 30 seconds, the closing time is shortened, and the pre-cured layer is reduced; when the pressure reaches the preset pressure, the eccentric automatically-adjusted plunger pump continues to pressurize until the maximum pressure is reached, and the pressure rise time is 350 seconds, so that the phenomenon that the closing speed is too high, the slab rebounds and the thickness of the slab cannot be effectively controlled is avoided; after the maximum pressure is reached, the slab generates plastic deformation under the action of temperature and pressure, the resilience force is reduced, and along with the plastic deformation of the slab, the pressure of the oil path of the eccentric automatically-adjusted plunger pump is reduced by 8% of the maximum pressure; when the pressure is reduced to the lower limit pressure preset in the high-pressure section, the pressure control system sends a signal, the eccentric automatically-adjusted plunger pump pressurizes to the highest pressure again, the boosting time is 20 seconds, and the compression ratio of the plate blank is increased; repeating the steps until the pressure plate is closed to the thickness gauge position, wherein the time is the closing time;
B) high-pressure maintaining, wherein the time period of the high-pressure maintaining is 20s after the pressure plate is closed;
C) the pressure is relieved in a segmented mode, the pressure relief is carried out in the following segments, and the contact between a pressure plate and a thickness gauge must be ensured in the pressure relief process; entering a T0 section, wherein the pressure is 1/2 of the highest pressure, and when the pressure relief time is 70 seconds, the plate blank begins to exhaust steam; after the T0 period, entering a T1 period of zero pressure of a pressurizing oil line, wherein the pressure relief time is 80 seconds, only the gravity of the pressing plate acts on the plate blank, and the plate blank continues to exhaust steam, after the T1 period is finished, the upper pressing plate is lifted up to ensure that the gravity still acts on the plate blank, and the pressure is maintained for 30 seconds under the pressure so as to facilitate the continuous steam exhaust of the plate blank; and finally, lifting the upper pressing plate by the lifting cylinder, and unloading the plate blank out of the hot press by the conveyor belt.
Example 4:
a fire prevention sandwich body prepared by using melamine impregnated paper mainly comprises 10 percent of melamine impregnated paper sheet, 85 percent of fiber and 5 percent of adhesive by weight percent, and is finished by crushing, screening, mixing, stirring, glue injection, paving and hot pressing;
1) crushing, feeding the melamine impregnated paper in the bin into a crusher through a conveyor belt for crushing, and feeding the crushed melamine impregnated paper into a screening machine for screening, wherein the rotating speed of the crusher is 4500 rpm;
2) screening, namely screening the crushed sheet bodies by using a screening machine, wherein the diameter of a screen is 2 cm; the sheet bodies passing through the screen mesh enter a weighing platform through a conveyor belt to be weighed, and the separated sheet bodies return to the crusher through another conveyor belt to be crushed again;
3) mixing, namely fully stirring and mixing 10 parts of melamine impregnated paper sheet bodies and 85 parts of fibers according to parts by weight, and weighing after mixing;
4) stirring and injecting glue, and injecting glue according to 5 parts by weight of glue solution of an adhesive; adding the weighed mixture of the melamine impregnated paper sheet body and the fibers into a stirrer, stirring, wherein in the stirring process, whether the mixture is agglomerated or not is observed, and if the agglomeration is observed, the stirring time is properly prolonged; after stirring without agglomeration, spraying and adding glue to the mixture in the box body for 12 minutes to attach glue solution to the surface of the melamine impregnated paper sheet;
5) paving, wherein the stirred and humidified mixture is conveyed into a pre-pressing template on a paving line through a conveying belt, and the thickness of the pavement in the pre-pressing template is 20 mm;
6) hot pressing, the thickness of the hot-press molding is 12mm, the hot-pressing time is 600 seconds, the temperature is 120 ℃, A) the pressing is closed: the lower pressing plate is fixed, firstly, the lifting cylinder quickly releases pressure, when the upper pressing plate and the upper surface of the plate blank are 1-2cm, the pressure is slowly released to zero, then the plate blank is pressurized together through an eccentric automatically-adjusted plunger pump, the preset pressure is 1/2 of the highest pressure, the pre-pressing time is 20 seconds, the closing time is shortened, and the pre-cured layer is reduced; when the pressure reaches the preset pressure, the eccentric automatically-adjusted plunger pump continues to pressurize until the maximum pressure is reached, and the pressure rise time is 350 seconds, so that the phenomenon that the closing speed is too high, the slab rebounds and the thickness of the slab cannot be effectively controlled is avoided; after the maximum pressure is reached, the slab generates plastic deformation under the action of temperature and pressure, the resilience force is reduced, and along with the plastic deformation of the slab, the pressure of the oil path of the eccentric automatically-adjusted plunger pump is reduced by 5% of the maximum pressure; when the pressure is reduced to the lower limit pressure preset in the high-pressure section, the pressure control system sends a signal, the eccentric automatically-adjusted plunger pump pressurizes to the highest pressure again, the boosting time is 30 seconds, and the compression ratio of the plate blank is increased; repeating the steps until the pressure plate is closed to the thickness gauge position, wherein the time is the closing time;
B) high-pressure maintaining, wherein the time period of the high-pressure maintaining is 20s after the pressure plate is closed;
C) the pressure is relieved in a segmented mode, the pressure relief is carried out in the following segments, and the contact between a pressure plate and a thickness gauge must be ensured in the pressure relief process; entering a T0 section, wherein the pressure is 1/3 of the highest pressure, and when the pressure relief time is 70 seconds, the plate blank begins to exhaust steam; after the T0 period, entering a T1 period of zero pressure of a pressurizing oil line, wherein the pressure relief time is 80 seconds, only the gravity of the pressing plate acts on the plate blank, and the plate blank continues to exhaust steam, after the T1 period is finished, the upper pressing plate is lifted up to ensure that the gravity still acts on the plate blank, and the pressure is maintained for 30 seconds under the pressure so as to facilitate the continuous steam exhaust of the plate blank; and finally, lifting the upper pressing plate by the lifting cylinder, and unloading the plate blank out of the hot press by the conveyor belt.
Example 5:
a fireproof sandwich body prepared by utilizing melamine impregnated paper mainly comprises melamine impregnated paper powder, an adhesive and fibers, and the weight percentage is as follows: 60% of melamine impregnated paper powder, 20% of adhesive and 20% of fiber; the preparation method comprises the steps of crushing, screening, mixing, stirring, injecting glue, paving and hot pressing;
1) crushing, feeding the melamine impregnated paper in the bin into a crusher through a conveyor belt for crushing, and feeding the crushed melamine impregnated paper into a screening machine for screening, wherein the rotating speed of the crusher is 4500 rpm;
2) screening, namely screening the crushed sheet bodies by using a screening machine, wherein the diameter of a screen is 0.5 cm; the sheet bodies passing through the screen mesh enter a weighing platform through a conveyor belt to be weighed, and the separated sheet bodies return to the crusher through another conveyor belt to be crushed again;
3) mixing, namely fully stirring and mixing 60 parts of melamine impregnated paper powder and 20 parts of fiber according to parts by weight, and weighing after mixing;
4) stirring and injecting glue, and injecting glue according to 20 parts by weight of glue solution of the adhesive; adding the weighed mixture of the melamine impregnated paper powder and the fibers into a stirrer, stirring, wherein during the stirring process, whether the mixture is agglomerated or not is observed, and if the agglomeration is observed, the stirring time is properly prolonged; after stirring without agglomeration, spraying and adding glue to the mixture in the box body, wherein the glue adding time is 12 minutes, so that glue solution is attached to the surface of the melamine impregnated paper powder;
5) paving, wherein the stirred and humidified mixture is conveyed into a pre-pressing template on a paving line through a conveying belt, and the thickness of the pavement in the pre-pressing template is 20 mm;
6) hot pressing, the thickness of the hot-press molding is 12mm, the hot-pressing time is 600 seconds, the temperature is 120 ℃, A) the pressing is closed: the lower pressing plate is fixed, firstly, the lifting cylinder quickly releases pressure, when the upper pressing plate and the upper surface of the plate blank are 1-2cm, the pressure is slowly released to zero, then the plate blank is pressurized together through an eccentric automatically-adjusted plunger pump, the preset pressure is 1/2 of the highest pressure, the pre-pressing time is 20 seconds, the closing time is shortened, and the pre-cured layer is reduced; when the pressure reaches the preset pressure, the eccentric automatically-adjusted plunger pump continues to pressurize until the maximum pressure is reached, and the pressure rise time is 350 seconds, so that the phenomenon that the closing speed is too high, the slab rebounds and the thickness of the slab cannot be effectively controlled is avoided; after the maximum pressure is reached, the slab generates plastic deformation under the action of temperature and pressure, the resilience force is reduced, and along with the plastic deformation of the slab, the pressure of the oil path of the eccentric automatically-adjusted plunger pump is reduced by 8% of the maximum pressure; when the pressure is reduced to the lower limit pressure preset in the high-pressure section, the pressure control system sends a signal, the eccentric automatically-adjusted plunger pump pressurizes to the highest pressure again, the boosting time is 30 seconds, and the compression ratio of the plate blank is increased; repeating the steps until the pressure plate is closed to the thickness gauge position, wherein the time is the closing time;
B) high-pressure maintaining, wherein the time period of the high-pressure maintaining is 20s after the pressure plate is closed;
C) the pressure is relieved in a segmented mode, the pressure relief is carried out in the following segments, and the contact between a pressure plate and a thickness gauge must be ensured in the pressure relief process; entering a T0 section, wherein the pressure is 1/2 of the highest pressure, and when the pressure relief time is 70 seconds, the plate blank begins to exhaust steam; after the T0 period, entering a T1 period of zero pressure of a pressurizing oil line, wherein the pressure relief time is 80 seconds, only the gravity of the pressing plate acts on the plate blank, and the plate blank continues to exhaust steam, after the T1 period is finished, the upper pressing plate is lifted up to ensure that the gravity still acts on the plate blank, and the pressure is maintained for 30 seconds under the pressure so as to facilitate the continuous steam exhaust of the plate blank; and finally, lifting the upper pressing plate by the lifting cylinder, and unloading the plate blank out of the hot press by the conveyor belt.
Example 6:
a fire-proof sandwich body prepared by utilizing melamine impregnated paper mainly comprises melamine impregnated paper powder and an adhesive, wherein 80% of the melamine impregnated paper powder and 20% of the adhesive are prepared by crushing, screening, stirring, glue injection, paving and hot pressing;
1) crushing, feeding the melamine impregnated paper in the bin into a crusher through a conveyor belt for crushing, and feeding the crushed melamine impregnated paper into a screening machine for screening, wherein the rotating speed of the crusher is 4500 rpm;
2) screening, namely screening the crushed sheet bodies by using a screening machine, wherein the diameter of a screen is 0.5 cm; the sheet bodies passing through the screen mesh enter a weighing platform through a conveyor belt to be weighed, and the separated sheet bodies return to the crusher through another conveyor belt to be crushed again;
4) stirring and injecting glue, namely stirring 80 parts of melamine impregnated paper powder and injecting glue of 20 parts of adhesive glue solution according to parts by weight; adding the weighed melamine impregnated paper powder into a stirrer, stirring, and observing whether the melamine impregnated paper powder is agglomerated or not in the stirring process, wherein if the agglomeration is observed, the stirring time is properly prolonged; after stirring without agglomeration, spraying and adding glue to the mixture in the box body, wherein the glue adding time is 12 minutes, so that glue solution is attached to the surface of the melamine impregnated paper powder;
5) paving, namely conveying the stirred and humidified melamine impregnated paper powder into a pre-pressing template on a paving line through a conveying belt, wherein the paving thickness in the pre-pressing template is 20 mm;
6) hot pressing, the thickness of the hot-press molding is 12mm, the hot-pressing time is 600 seconds, the temperature is 120 ℃, A) the pressing is closed: the lower pressing plate is fixed, firstly, the lifting cylinder quickly releases pressure, when the upper pressing plate and the upper surface of the plate blank are 1-2cm, the pressure is slowly released to zero, then the plate blank is pressurized together through an eccentric automatically-adjusted plunger pump, the preset pressure is 1/2 of the highest pressure, the pre-pressing time is 20 seconds, the closing time is shortened, and the pre-cured layer is reduced; when the pressure reaches the preset pressure, the eccentric automatically-adjusted plunger pump continues to pressurize until the maximum pressure is reached, and the pressure rise time is 350 seconds, so that the phenomenon that the closing speed is too high, the slab rebounds and the thickness of the slab cannot be effectively controlled is avoided; after the maximum pressure is reached, the slab generates plastic deformation under the action of temperature and pressure, the resilience force is reduced, and along with the plastic deformation of the slab, the pressure of the oil path of the eccentric automatically-adjusted plunger pump is reduced by 5% of the maximum pressure; when the pressure is reduced to the lower limit pressure preset in the high-pressure section, the pressure control system sends a signal, the eccentric automatically-adjusted plunger pump pressurizes to the highest pressure again, the boosting time is 30 seconds, and the compression ratio of the plate blank is increased; repeating the steps until the pressure plate is closed to the thickness gauge position, wherein the time is the closing time;
B) high-pressure maintaining, wherein the time period of the high-pressure maintaining is 20s after the pressure plate is closed;
C) the pressure is relieved in a segmented mode, the pressure relief is carried out in the following segments, and the contact between a pressure plate and a thickness gauge must be ensured in the pressure relief process; entering a T0 section, wherein the pressure is 1/2 of the highest pressure, and when the pressure relief time is 70 seconds, the plate blank begins to exhaust steam; after the T0 period, entering a T1 period of zero pressure of a pressurizing oil line, wherein the pressure relief time is 80 seconds, only the gravity of the pressing plate acts on the plate blank, and the plate blank continues to exhaust steam, after the T1 period is finished, the upper pressing plate is lifted up to ensure that the gravity still acts on the plate blank, and the pressure is maintained for 30 seconds under the pressure so as to facilitate the continuous steam exhaust of the plate blank; and finally, lifting the upper pressing plate by the lifting cylinder, and unloading the plate blank out of the hot press by the conveyor belt.
Further, in examples 3, 4 and 5, the fibers are one or more of wood fibers, glass fibers and polyester fibers, so that the plasticity and toughness of the fireproof sandwich body are enhanced.
Furthermore, the outer side of the fireproof sandwich body is provided with a decorative surface layer, and the fireproof sandwich body is beautified through the decorative surface layer.
Further, a plurality of wood board layers are arranged on the outer side of the fireproof sandwich body, a veneer layer is arranged on the outer side of each wood board layer, and each wood board layer is one or more of a poplar layer, a pine layer, a eucalyptus layer and a density fiberboard; the thickness of the wood board layer is 0.5-3 mm.
Further, a fire retardant is arranged on the wood board layer.
Furthermore, the thickness of the formed plate made of the fireproof sandwich body is 2-25 mm.
Furthermore, the fireproof sandwich body is arranged in a plurality of layers in the forming plate manufactured by the fireproof sandwich body, and a plurality of wood plate layers are arranged on the outer side of the fireproof sandwich body.
Experimental example:
the technical parameters of a 1200-ton hot-pressing veneering machine are adopted: working pressure: 1200 tons, the number of oil cylinders: 6, diameter of oil cylinder: phi 320mm, heating power: 40.5KW, external dimension: 5000mm (length) × 1800mm (width) × 2750mm (height), heating method: hot oil circulation heating, electric appliance structure: analog circuit, table size 2500mm (length) x 1300mm (width), total weight: 17.5 tons, carrying out hot pressing on a 12mm fireproof sandwich body, setting the highest pressure to be 3.5MPa and the preset pressure Pa to be 2.0MPa, taking a sample block of 80mm multiplied by 12mm of the fireproof sandwich body in the examples 1, 2, 3, 4, 5 and 6, and carrying out a fireproof grade test and a fireproof limit test according to GB 8624 plus 2012 building materials and product combustion performance grades, wherein the test results are as follows:
| example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Fire rating | A1 | A1 | A1 | A1 | A1 | A1 |
| The fire resisting time is 1.5h | Non-combustible | Non-combustible | Non-combustible | Non-combustible | Non-combustible | Non-combustible |
| Refractory time is 2h | Non-combustible | Non-combustible | Non-combustible | Non-combustible | Non-combustible | Non-combustible |
| Refractory time is 3h | Non-combustible | Non-combustible | Non-combustible | Non-combustible | Non-combustible | Non-combustible |
In conclusion, through to leftover bits waste material hot briquetting in the melamine ecological plate, reduce the piling up of leftover bits waste material in the melamine ecological plate, waste utilization reduces sanitation work's pressure and work load, utilizes leftover bits waste material preparation fire prevention sandwich body, reduction in production cost improves the fire-proof rating of panel.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the present invention as defined in the accompanying claims.
Claims (7)
1. A fireproof sandwich body prepared by utilizing melamine impregnated paper mainly comprises melamine impregnated paper sheets, and is characterized in that the fireproof sandwich body is prepared by the following process steps:
1) crushing, feeding the melamine impregnated paper in the bin into a crusher through a conveyor belt to crush, feeding the crushed melamine impregnated paper into a screening machine to screen, wherein the rotating speed of the crusher is 3000-5000 r/min;
2) screening, wherein a screening machine screens the crushed sheet bodies, and the diameter of a screen is 0.5-3 mm; the sheet bodies passing through the screen mesh enter a weighing platform through a conveyor belt to be weighed, and the separated sheet bodies return to the crusher through another conveyor belt to be crushed again;
3) stirring and humidifying, and accurately weighing the needed melamine impregnated paper sheet body and water according to the weight ratio of the melamine impregnated paper sheet body to the water of 8:1-12: 1; adding the weighed melamine impregnated paper sheet into a stirrer, stirring, and observing whether the melamine impregnated paper sheet is agglomerated or not in the stirring process, wherein if the agglomeration is observed, the stirring time is properly prolonged; after stirring without agglomeration, spraying and humidifying the melamine impregnated paper sheet body in the box body for 10-20 minutes to moisten the surface of the melamine impregnated paper sheet body;
4) paving, wherein the stirred and humidified melamine impregnated paper sheet body is conveyed into a pre-pressing template on a paving line through a conveying belt, and the thickness of the pavement in the pre-pressing template is 5mm-30 mm;
5) hot pressing, the thickness of the hot pressing molding is 1.5mm-18mm, the time of the hot pressing molding is 300-: the lower pressing plate is fixed, firstly, the lifting cylinder quickly releases pressure, when the upper pressing plate and the upper surface of the plate blank are 1-2cm, the pressure is slowly released to zero, then the plate blank is quickly pressurized by an eccentric automatically-adjusted plunger pump, the preset pressure is 1/2-2/3 of the highest pressure, the pre-pressing time is 10-50 seconds, the closing time is shortened, and the pre-cured layer is reduced; when the pressure reaches the preset pressure, the eccentric automatically-adjusted plunger pump continues to pressurize until the highest pressure is reached, and the pressure rise time is 200-; after the highest pressure is reached, the slab generates plastic deformation under the action of temperature and pressure, the resilience force is reduced, and along with the plastic deformation of the slab, the pressure of an oil path of the eccentric automatically-adjusted plunger pump is reduced by 5% -10% of the highest pressure; when the pressure is reduced to the lower limit pressure preset in the high-pressure section, the pressure control system sends a signal, the eccentric automatically-adjusted plunger pump pressurizes to the highest pressure again, the boosting time is 10-30 seconds, and the compression ratio of the plate blank is increased; repeating the steps until the pressure plate is closed to the thickness gauge position, wherein the time is the closing time;
B) maintaining the pressure at high pressure, wherein the time period of the pressure maintaining at high pressure is 10-20s after the pressure plate is closed;
C) the pressure is relieved in a segmented mode, the pressure relief is carried out in the following segments, and the contact between a pressure plate and a thickness gauge must be ensured in the pressure relief process; entering a T0 section, wherein the pressure is 1/3-1/2 of the highest pressure, and when the pressure relief time is 50-80 seconds, the plate blank begins to exhaust steam; after the T0 period, entering a T1 period of zero pressure of a pressurizing oil line, wherein the pressure relief time is 70-90 seconds, only the gravity of the pressing plate acts on the plate blank, the plate blank continues to exhaust steam, after the T1 period is finished, the upper pressing plate is lifted up, the gravity of the upper pressing plate still acts on the plate blank, and the pressure is maintained for 10-30 seconds under the pressure, so that the steam is continuously exhausted from the plate blank; and finally, lifting the upper pressing plate by the lifting cylinder, and unloading the plate blank out of the hot press by the conveyor belt.
2. The fireproof sandwich body is characterized by comprising a melamine impregnated paper sheet body and fibers, wherein the melamine impregnated paper sheet body comprises the following components in percentage by weight: 80-95% of melamine impregnated paper sheet body and 5-20% of fiber;
1) crushing, feeding the melamine impregnated paper in the bin into a crusher through a conveyor belt to crush, feeding the crushed melamine impregnated paper into a screening machine to screen, wherein the rotating speed of the crusher is 3000-5000 r/min;
2) screening, wherein a screening machine screens the crushed sheet bodies, and the diameter of a screen is 0.5-3 mm; the sheet bodies passing through the screen mesh enter a weighing platform through a conveyor belt to be weighed, and the separated sheet bodies return to the crusher through another conveyor belt to be crushed again;
3) mixing, namely fully stirring and mixing 80-95 parts by weight of melamine impregnated paper sheet bodies and 5-20 parts by weight of fibers, and weighing the mixture, wherein the fibers are one or more of wood fibers, glass fibers and polyester fibers;
4) stirring and humidifying, and accurately weighing the required mixture and water according to the weight ratio of the melamine impregnated paper sheet body to the mixture of the fibers to the water of 8:1-12: 1; adding the weighed mixture into a stirrer, stirring, observing whether the mixture is agglomerated or not in the stirring process, and if the agglomeration is found, properly prolonging the stirring time; after stirring without agglomeration, spraying and humidifying the mixture in the box for 10-20 minutes to ensure that the surface of the mixture is moist;
5) paving, wherein the stirred and humidified mixture is conveyed into a pre-pressing template on a paving line through a conveying belt, and the thickness of the pavement in the pre-pressing template is 5-30 mm;
6) hot pressing, the thickness of the hot pressing molding is 1.5mm-18mm, the time of the hot pressing molding is 300-: the lower pressing plate is fixed, firstly, the lifting cylinder quickly releases pressure, when the upper pressing plate and the upper surface of the plate blank are 1-2cm, the pressure is slowly released to zero, then the plate blank is quickly pressurized by an eccentric automatically-adjusted plunger pump, the preset pressure is 1/2-2/3 of the highest pressure, the pre-pressing time is 10-50 seconds, the closing time is shortened, and the pre-cured layer is reduced; when the pressure reaches the preset pressure, the eccentric automatically-adjusted plunger pump continues to pressurize until the highest pressure is reached, and the pressure rise time is 200-; after the highest pressure is reached, the slab generates plastic deformation under the action of temperature and pressure, the resilience force is reduced, and along with the plastic deformation of the slab, the pressure of an oil path of the eccentric automatically-adjusted plunger pump is reduced by 5% -10% of the highest pressure; when the pressure is reduced to the lower limit pressure preset in the high-pressure section, the pressure control system sends a signal, the eccentric automatically-adjusted plunger pump pressurizes to the highest pressure again, the boosting time is 10-30 seconds, and the compression ratio of the plate blank is increased; repeating the steps until the pressure plate is closed to the thickness gauge position, wherein the time is the closing time;
B) maintaining the pressure at high pressure, wherein the time period of the pressure maintaining at high pressure is 10-20s after the pressure plate is closed;
C) the pressure is relieved in a segmented mode, the pressure relief is carried out in the following segments, and the contact between a pressure plate and a thickness gauge must be ensured in the pressure relief process; entering a T0 section, wherein the pressure is 1/3-1/2 of the highest pressure, and when the pressure relief time is 50-80 seconds, the plate blank begins to exhaust steam; after the T0 period, entering a T1 period of zero pressure of a pressurizing oil line, wherein the pressure relief time is 70-90 seconds, only the gravity of the pressing plate acts on the plate blank, the plate blank continues to exhaust steam, after the T1 period is finished, the upper pressing plate is lifted up, the gravity of the upper pressing plate still acts on the plate blank, and the pressure is maintained for 10-30 seconds under the pressure, so that the steam is continuously exhausted from the plate blank; and finally, lifting the upper pressing plate by the lifting cylinder, and unloading the plate blank out of the hot press by the conveyor belt.
3. A fire-resistant sandwich manufactured from melamine-impregnated paper according to any one of claims 1-2, characterised in that the fire-resistant sandwich is provided with a finishing layer on the outside.
4. The fireproof sandwich body prepared by using the melamine impregnated paper as claimed in claim 3, wherein a wood board layer is arranged on the outer side of the fireproof sandwich body, a veneer layer is arranged on the outer side of the wood board layer, and the wood board layer is one or more of a poplar layer, a pine layer, a eucalyptus layer and a density fiberboard.
5. The fire-retardant sandwich body prepared by using the melamine impregnated paper as claimed in claim 4, wherein the thickness of the wood board layer is 0.5-3mm, and the wood board layer is provided with the fire retardant.
6. A fire-resistant sandwich made of melamine-impregnated paper according to claim 3, characterized in that the thickness of the formed sheet made of the fire-resistant sandwich is 2-25 mm.
7. The fireproof sandwich body prepared by using the melamine impregnated paper as claimed in claim 6, wherein the fireproof sandwich body is provided with a plurality of layers in the forming board manufactured by the fireproof sandwich body, and a plurality of wood board layers are arranged outside the fireproof sandwich body.
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| CN102019641A (en) * | 2010-11-01 | 2011-04-20 | 福建省邵武福人林产有限公司 | Application of impregnated paper and process for producing shaving board |
| CN104339435A (en) * | 2014-11-28 | 2015-02-11 | 云南司珈尔木业股份有限公司 | Hot pressing process for medium density fiberboards |
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| CN105612062A (en) * | 2013-10-18 | 2016-05-25 | 瓦林格创新股份有限公司 | A method of manufacturing a building panel |
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| CN1128198A (en) * | 1994-12-05 | 1996-08-07 | 达亚能源有限公司 | Hot-pressed board made of waste paper and waste plastics |
| CN1128694A (en) * | 1994-12-31 | 1996-08-14 | 达亚能源有限公司 | Daya plate No.2 |
| CN205767845U (en) * | 2016-07-18 | 2016-12-07 | 山东瑞三化工科技有限公司 | A kind of formaldehyde-free plywood |
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| CN102019641A (en) * | 2010-11-01 | 2011-04-20 | 福建省邵武福人林产有限公司 | Application of impregnated paper and process for producing shaving board |
| CN105612062A (en) * | 2013-10-18 | 2016-05-25 | 瓦林格创新股份有限公司 | A method of manufacturing a building panel |
| CN204172159U (en) * | 2014-10-30 | 2015-02-25 | 德华兔宝宝装饰新材股份有限公司 | A kind of pre-paint finish oriented wood chipboard |
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