CN113319977A - Production method of glass magnesium board and production method of multilayer composite glass magnesium board - Google Patents

Production method of glass magnesium board and production method of multilayer composite glass magnesium board Download PDF

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Publication number
CN113319977A
CN113319977A CN202110574713.9A CN202110574713A CN113319977A CN 113319977 A CN113319977 A CN 113319977A CN 202110574713 A CN202110574713 A CN 202110574713A CN 113319977 A CN113319977 A CN 113319977A
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China
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kneading
layer
board
extruding
extrusion
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CN202110574713.9A
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CN113319977B (en
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戴东锡
付中
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Wuxi Zhuo New Materials Co.,Ltd.
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
    • B28B1/525—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement containing organic fibres, e.g. wood fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
    • B28B17/02—Conditioning the material prior to shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/12—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein one or more rollers exert pressure on the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B28B3/22—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded by screw or worm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/40—Mixing specially adapted for preparing mixtures containing fibres
    • B28C5/402—Methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/30—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a production method of a glass magnesium board and a multilayer composite glass magnesium board, which comprises a material dissolving step, a material proportioning step, a high-speed material mixing step, a kneading and banburying step, a vacuum dehumidification step and an extrusion molding step to produce a finished glass magnesium board without a glass fiber cloth layer.

Description

Production method of glass magnesium board and production method of multilayer composite glass magnesium board
Technical Field
The invention relates to the technical field of glass magnesium boards, in particular to a production method of a glass magnesium board and a production method of a multilayer composite glass magnesium board.
Background
The glass magnesium fireproof board is also called as glass magnesium board, magnesium oxide board, magnesite board and magnesium board. The components for producing the glass magnesium fireproof plate material are active high-purity magnesium oxide (MgO) and high-quality magnesium chloride (MgCl)2) The composite material comprises alkali-resistant glass fiber cloth, plant fiber, non-combustible light perlite, chemically stable lithopone, high molecular polymer and a high-performance modifier.
At present, in the production process of the magnesium oxide board, firstly, all components for producing the magnesium oxide board are mixed and stirred to obtain a pulpy raw material, then the pulpy raw material is poured into a mould for forming, the forming process generally comprises a layer of pulpy raw material and a layer of glass fiber cloth, or at least the bottom layer and the surface layer are added with the glass fiber cloth, then the pulpy raw material and the layer of glass fiber cloth are immersed into warm water for solidification, and finally the magnesium oxide board is obtained, the magnesium oxide board is formed piece by piece, but not continuously produced, the solidification time of the magnesium oxide board is longer, the number of forming moulds needed for producing the magnesium oxide boards with various dimensions is more, which causes the production efficiency of the magnesium oxide board to be extremely low, the production cost to be higher, in addition, the thickness error of the magnesium oxide board obtained by forming is larger, the moisture content is high, the thickness dimension is unstable, the magnesium oxide board obtained by forming needs various mechanical processing after long-time maintenance processing, the subsequent process steps are more, the loss of the processing process is very large, which is also an important reason for keeping the production cost of the magnesium oxide board high, and therefore, the improvement is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the production method of the glass magnesium board, which has high production efficiency and low production cost, and the produced glass magnesium board has high structural strength.
In order to achieve the purpose, the invention adopts the technical scheme that: the production method of the glass magnesium board comprises the following steps,
a dissolving step, pouring magnesium sulfate heptahydrate which is in a crystalline powder physical state into a solution pool filled with water, stirring and dissolving to obtain a magnesium sulfate solution serving as an S1 solution for later use, wherein the mass concentration of the magnesium sulfate heptahydrate of the S1 solution is 26-30g/100 ml;
and a material mixing step, namely pouring the S1 solution into a stirring barrel, and then adding the lignin fiber, the magnesium sulfate modifier and the polyacrylamide, wherein the weight ratio of the S1 solution to the lignin fiber to the magnesium sulfate modifier to the polyacrylamide is 1: 3%: 0.2-2%: 0.2-1%, stirring for 1-20 min to obtain S2 solution, and uniformly dispersing the lignin fiber in the S2 solution;
a high-speed mixing step, namely firstly putting magnesium oxide, wood powder, talcum powder and xanthan gum into a high-speed mixer to be stirred for 1-5 minutes, then pouring the S2 solution into the high-speed mixer to be stirred for 1-20 minutes, so that the raw materials in the high-speed mixer are converted into mud-shaped or small-ball-shaped gel, the gel comprises gel formed by xanthan gum and polyacrylamide, lignin fiber and wood powder which are uniformly distributed and wrapped in the gel, and the water content of the gel is controlled to be 25-30%;
a kneading and banburying step, namely conveying the gel obtained in the high-speed mixing step to kneading equipment, and kneading and banburying the gel through a kneading rod of at least one kneading equipment until the gel is kneaded to form a plurality of dough-shaped raw materials with plasticity and viscosity;
a vacuum dehumidification step, namely conveying the bulk raw material to a vacuum treatment chamber, performing vacuum treatment through the vacuum treatment chamber, extracting gas and moisture in the bulk raw material, and discharging the bulk raw material from the vacuum treatment chamber to obtain a raw material for extrusion molding, wherein the moisture content of the raw material for extrusion molding is controlled to be below 25%;
an extrusion curing step, namely conveying the raw materials for extrusion molding to a screw extrusion molding mechanism, continuously extruding and molding at normal temperature, continuously extruding a sheet-shaped magnesium oxide board blank through an extrusion die head of the screw extrusion molding mechanism, primarily curing and basically shaping the extruded magnesium oxide board blank through extrusion molding by using polyacrylamide and xanthan gum, wherein the surface hardness of the magnesium oxide board blank reaches 30-35 degrees of Shore hardness, and the water content of the magnesium oxide board blank is controlled to be below 20%;
a thickness fixing treatment step, namely performing thickness fixing treatment on the magnesium oxide board blank through at least one certain thickness rolling device to obtain a magnesium oxide board with a set thickness, controlling the water content of the magnesium oxide board to be below 18%, and controlling the surface hardness of the magnesium oxide board to reach Shore hardness 40-45 degrees;
a surface drying step, namely conveying the glass magnesium board forward, enabling the glass magnesium board to pass through a tunnel type drying oven, and carrying out surface drying treatment on the glass magnesium board through the tunnel type drying oven to obtain the cured glass magnesium board, wherein the water content of the glass magnesium board after surface drying is controlled to be below 15%, the surface hardness reaches 60-65 degrees, and the bending strength reaches 15-18 MPa;
a maintenance treatment step, in which the glass magnesium board is maintained;
and a finished product step, namely obtaining a finished product glass magnesium board without the glass fiber cloth layer after the curing treatment step, wherein the surface hardness of the finished product glass magnesium board is controlled to be more than 80HV, and the bending strength reaches more than 20 MPa.
Further, in the kneading and banburying step, the kneading equipment comprises high-speed kneading equipment and low-speed kneading equipment, the gel is firstly conveyed to the high-speed kneading equipment for high-speed kneading and banburying, and then is conveyed to the low-speed kneading equipment for low-speed kneading and banburying, and the rotating speed of a kneading rod of the low-speed kneading equipment is lower than that of a kneading rod of the high-speed kneading equipment; in the kneading and banburying step, firstly, the gel is kneaded to a state that the gel is initially rolled by high-speed kneading equipment, then the gel is continuously kneaded by low-speed kneading equipment until a plurality of dough-shaped raw materials with plasticity and viscosity are formed in a kneading and banburying chamber of the low-speed kneading equipment, and the dough-shaped raw materials are continuously output to the vacuum treatment chamber by the low-speed kneading equipment so as to realize continuous output of the dough-shaped raw materials;
in the thickness-fixing processing step, the thickness-fixing rolling equipment selects at least one of a thickness-fixing belt rolling mechanism, a thickness-fixing roller set and a tabletting type circulating crawler belt;
the method for carrying out thickness setting treatment on the magnesium oxide board blank by the thickness setting belt pressing and conveying mechanism is to press and convey the magnesium oxide board blank forwards by a circulating conveying belt arranged on a thickness setting frame and extrude and roll the magnesium oxide board blank by the circulating conveying belt in the conveying process;
the method for carrying out thickness-fixing treatment on the magnesium oxide board blank by the thickness-fixing press roll group is to forward press-feed the magnesium oxide board blank by a plurality of thickness-fixing press roll groups arranged on a thickness-fixing frame, and roll the magnesium oxide board blank by the thickness-fixing press roll groups in the conveying process;
the method for carrying out thickness-fixing treatment on the magnesium oxide board blank by the tablet type circulating crawler belt comprises the steps of forwards pressing and conveying the magnesium oxide board blank by at least one tablet type circulating crawler belt arranged on a thickness-fixing frame, and extruding the magnesium oxide board blank by the tablet type circulating crawler belt in the conveying process;
the thickness of the glass magnesium board blank is reduced by rolling of the fixed-thickness press roll group or extrusion of the tabletting type circulating crawler, the thickness of the glass magnesium board blank is controlled within a set error range in the fixed-thickness processing step, and meanwhile, extrusion drainage and accelerated curing and shaping speed are realized, so that the thickness of the obtained glass magnesium board is equal to or close to that of a finished product glass magnesium board.
Further, in the kneading and banburying steps,
a kneading output mechanism is respectively arranged below the kneading equipment and comprises a kneading discharge barrel and a kneading discharge screw rod arranged in the kneading discharge barrel, the upper side of the kneading discharge barrel is provided with a kneading feed inlet communicated with the kneading mixing chamber of the kneading equipment, and the other side of the kneading discharge barrel is provided with a kneading discharge outlet;
the high-speed kneading equipment is fixed at the upper side of the low-speed kneading equipment, a kneading discharge port of a kneading output mechanism fixed below the high-speed kneading equipment extends to the upper part of a kneading and banburying chamber of the low-speed kneading equipment, and the gel is subjected to high-speed kneading and banburying treatment and then is continuously conveyed to the low-speed kneading equipment for low-speed kneading and banburying treatment;
the rotating speed of the kneading rod of the high-speed kneading equipment is 300-600 revolutions per minute, and the rotating speed of the kneading rod of the low-speed kneading equipment is 30-250 revolutions per minute;
in the step of the thickness-fixing treatment,
the thickness is determined by a thickness-determining belt pressing and conveying mechanism, an upper circulating conveying belt and a lower circulating conveying belt are mounted on the thickness-determining frame, a belt pressing and conveying channel which penetrates through the two circulating conveying belts is formed between the two circulating conveying belts, and the upper circulating conveying belt and the lower circulating conveying belt which are positioned on the belt pressing and conveying channel are abutted by pressing rollers or pressing plates mounted on the upper side and the lower side of the belt pressing and conveying channel, so that the magnesium oxide board blank passes through the belt pressing and conveying channel and is extruded by the upper circulating conveying belt and the lower circulating conveying belt of the belt pressing and conveying channel;
performing thickness fixing treatment through a thickness fixing compression roller group, enabling the glass magnesium board blank to sequentially pass through a plurality of thickness fixing compression roller groups, enabling one thickness fixing compression roller group to comprise two compression rollers which are arranged on a thickness fixing rack at intervals up and down, are vertically aligned and have opposite rotating directions, enabling the glass magnesium board blank to synchronously roll the upper surface and the lower surface of the glass magnesium board blank through the upper compression roller and the lower compression roller of each thickness fixing compression roller group in sequence, gradually reducing the pressing plate interval between the upper compression roller and the lower compression roller of each thickness fixing compression roller group along the advancing direction of the glass magnesium board blank, gradually compressing the glass magnesium board blank in a grading manner, and finally enabling the glass magnesium board blank to be completely shaped;
the thickness fixing treatment is carried out through a tabletting type circulating crawler belt, the tabletting type circulating crawler belt is arranged on the first side of a thickness fixing rack, a pressing plate channel which penetrates through the front and the back is arranged in the middle of the thickness fixing rack, one of a pressing roller, a circulating conveying belt or the tabletting type circulating crawler belt is arranged on the second side of the thickness fixing rack, and a glass magnesium board blank is conveyed and extruded forwards through the pressing plate channel, wherein the tabletting type circulating crawler belt is formed by sequentially connecting a plurality of pressing plates, the width of each pressing plate is greater than that of the glass magnesium board blank, the length of each pressing plate is 3-20cm, one side of the glass magnesium board blank pressed by the tabletting type circulating crawler belt is set as the side of the pressing plate, the inner side of the pressing plate side presses the glass magnesium board blank, and the outer side of the pressing plate side is provided with at least one pressing roller;
controlling the thickness error of the glass magnesium board material obtained after the thickness fixing treatment to be below 0.5%;
the width of the glass magnesium board blank is limited at least by the fixed width boards arranged at the left side and the right side of the fixed thickness frame.
Further, two sets of preforming formula circulation tracks about installing at the machine frame of deciding the thickness, be provided with a clamp plate passageway between two sets of preforming formula circulation tracks from top to bottom, the sheetmetal is chooseed for use to the preforming, preforming formula circulation track is the circulation conveyer belt that a plurality of sheetmetals connect in order and form, the outside on the clamp plate side of two upper and lower group preforming formula circulation tracks sets up a plurality of pinch rolls at the interval respectively, the vertical alignment of the pinch roll of two upper and lower group's corresponding position of preforming formula circulation track, send into the clamp plate passageway with glass magnesium board embryonic plate, extrude glass magnesium board embryonic plate simultaneously and carry glass magnesium board embryonic plate forward through two upper and lower groups of preforming formula circulation tracks.
Further, in the vacuum dehumidification step, the dough raw materials are continuously extruded into the vacuum treatment chamber from a feeding extrusion chamber which is hermetically arranged above the vacuum treatment chamber to the vacuum treatment chamber;
the method comprises the following steps of enabling a bulk raw material to downwards pass through a material distributing and extruding screen plate which is arranged in a feeding and extruding chamber or a vacuum processing chamber and provided with a plurality of extruding holes, continuously and downwards extruding the bulk raw material from the extruding holes to obtain a plurality of strip-shaped materials, releasing gas and water contained in the bulk raw material into the vacuum processing chamber, and hermetically separating the feeding and extruding chamber from the vacuum processing chamber through the material distributing and extruding screen plate and the strip-shaped materials which are extruded in the extruding holes;
making the strip-shaped material downwards pass through a vacuum treatment chamber, and pumping gas and water out of the vacuum treatment chamber;
in the step of extrusion curing, an extrusion feeding chamber of the screw extrusion molding mechanism is hermetically arranged below the vacuum treatment chamber, so that strip materials passing through the vacuum treatment chamber respectively fall into the extrusion feeding chamber, and the raw materials for extrusion molding are obtained in the extrusion feeding chamber;
an extrusion machine barrel is arranged in the middle of the screw extrusion molding mechanism, the rear side of an extrusion molding pushing screw rod rotatably arranged in the extrusion machine barrel extends into the extrusion feeding chamber, the front side of the extrusion molding pushing screw rod is adjacent to an extrusion die head arranged on the front side of the screw extrusion molding mechanism, the extrusion molding raw material continuously falling into the extrusion feeding chamber is pushed out of the extrusion feeding chamber by the extrusion molding pushing screw rod extending into the extrusion feeding chamber and is sent into the extrusion machine barrel, and the extrusion molding pushing screw rod continuously pushes the extrusion molding raw material in the extrusion feeding chamber;
mixing the extrusion molding raw materials entering the extruder barrel into a cluster under the extrusion and mixing actions of the extrusion molding pushing screw at normal temperature, and finally continuously extruding through an extrusion die head to obtain the glass magnesium board blank;
wherein the temperature in the extruder barrel and the extrusion temperature of the extrusion die head are both controlled at 20-30 ℃.
Furthermore, a feed hopper is arranged at the rear side of the screw extrusion molding mechanism, the inner cavity of the feed hopper is arranged into the extrusion feeding chamber, a vacuum processing device is hermetically arranged above the feed hopper, the inner cavity of the vacuum processing device is arranged into the vacuum processing chamber, an extruding device is hermetically arranged above the vacuum processing device, the inner cavity of the extruding device is arranged into the feeding extruding chamber, the vacuum processing chamber and the extrusion feeding chamber are vertically aligned, the upper part of the vacuum processing chamber is communicated with the lower part of the feeding extruding chamber, and the lower part of the vacuum processing chamber is communicated with the extrusion feeding chamber; the extruding device, the vacuum processing device and the screw extrusion molding mechanism which are assembled into a whole form a dehumidifying and extruding composite device which is used for sequentially realizing the vacuum dehumidifying step and the extruding and curing step and realizing continuous production;
conveying the bulk raw materials to an extruding device, and extruding the bulk raw materials in a feeding and extruding chamber downwards through an extruding device arranged in the feeding and extruding chamber;
the material distributing and extruding screen plate is provided with a material distributing and extruding screen plate, a material extruding device is arranged on the material distributing and extruding screen plate, the material extruding device is used for extruding and molding a bulk raw material downwards through each material extruding hole of the material distributing and extruding screen plate and then feeding the bulk raw material into a vacuum treatment chamber, the upper part of the vacuum treatment chamber is sealed at the material distributing and extruding screen plate through the bulk raw material piled above the material distributing and extruding screen plate and extruding strip-shaped materials filled in each material extruding hole, and each strip-shaped material is sucked downwards under the assistance of the negative pressure environment of the vacuum treatment chamber;
extruding the bulk raw materials into a plurality of strip materials which are continuous in length, smaller in transverse section, larger in surface area and distributed at intervals through a material distributing and extruding screen plate, continuously extruding the strip materials towards a vacuum treatment chamber, and allowing the strip materials to downwards penetrate through the vacuum treatment chamber with a set height under the action of self weight;
continuously pumping gas and water in the vacuum processing chamber by an air pumping device connected with the vacuum processing chamber, and controlling the vacuum degree of the vacuum processing chamber to be 0.5-2 MPa;
the strip materials extruded into the extruder barrel by the extrusion molding pushing screw are mixed into a cluster under the stirring and mixing action of the extrusion molding pushing screw, and are subjected to compression treatment, mixing treatment and shearing treatment in the extruder barrel along with continuous forward extrusion of the extrusion molding pushing screw, and are continuously extruded through the extrusion die head.
Further, in the dissolving step, the water temperature of the solution pool is controlled to be 20-30 ℃, and the weight ratio of the magnesium sulfate heptahydrate to the water is controlled to be 1: 3-4;
in the material preparation step, stirring the S1 solution, the lignin fiber, the magnesium sulfate modifier and the polyacrylamide for 10-15 minutes to obtain an S2 solution, wherein the polyacrylamide has high compatibility with the magnesium sulfate in the S1 solution and low polyacrylamide content, the polyacrylamide reacts with water to form a network node through inter-chain mechanical entanglement and hydrogen bonds, and the low-concentration polyacrylamide in the S2 solution enables the polyacrylamide to form a polymer solution with a network structure in a gel state, wherein the polyacrylamide is selected from anionic polyacrylamide with the molecular weight of 1000-2000 ten thousand;
in the high-speed mixing step, S2 is poured into a high-speed mixer to be dissolved, then the mixture is stirred for 3-5 minutes, the mixture is stirred in the high-speed mixing step until the raw materials in the high-speed mixer are initially agglomerated, sol molecules of xanthan gum form a super-bonding banded spiral copolymer in the high-speed stirring process to form a reticular structure, and the reticular structure of xanthan gum and the reticular structure of polyacrylamide are mutually staggered in a three-dimensional space so as to wrap lignin fiber and wood powder and coagulate to form a plurality of relatively separated small-agglomerated or small-blocky gels;
in the kneading and banburying step, a kneading device is provided with a kneading and banburying chamber, two kneading rods with opposite rotation directions are installed in the kneading and banburying chamber, the two kneading rods are respectively provided with at least one kneading part protruding along the radial direction, the corresponding kneading parts of the two kneading rods are adjacently arranged along the axial direction and are in clearance fit, the outer sides of the kneading parts are respectively in clearance fit with the inner wall of the kneading and banburying chamber, gel is put into the kneading and banburying chamber, and the gel is continuously kneaded by the two kneading rods to obtain a bulk raw material, wherein the average diameter of the bulk raw material is larger than 10 cm;
in the kneading and banburying steps, a low shearing effect is generated on xanthan gum in gel during kneading and banburying, the xanthan gum in the gel forms network rubber ribs with dense grids, each area of the bulk raw material is uniformly and densely distributed with the network rubber ribs, the network rubber ribs and a network structure of polyacrylamide wrap gas and moisture generated by the bulk raw material, and densely distributed air holes are formed in the bulk raw material;
in the vacuum dehumidification step, a bulk raw material is continuously fed from an upper opening of a feeding and extruding chamber, the bulk raw material is pushed downwards into an extruding channel arranged below the extruding screw through an extruding screw arranged in the feeding and extruding chamber, the bulk raw material downwards passes through a material distributing and extruding screen plate arranged in the extruding channel or below the extruding channel, the bulk raw material is stacked to a set height above the material distributing and extruding screen plate and the set extrusion force is protected, and the upper space of the material distributing and extruding screen plate is sealed by the bulk raw material which is extruded and stacked above the material distributing and extruding screen plate;
controlling the vacuum degree of a vacuum processing chamber to be 0.8-1.5MPa, after a bulk raw material is extruded through an extruding hole and is converted into a plurality of strip materials, dispersing and wrapping air holes in the bulk raw material in each corresponding strip material, reducing the volume of the air holes in the strip materials and increasing the pressure, after the strip materials enter the vacuum processing chamber, enabling the air pressure outside the strip materials to be far smaller than the pressure in the air holes in the strip materials, respectively expanding and breaking the air holes in the strip materials to enable the strip materials to be internally and externally distributed with micro cracks, enabling the gas and water diameter in the air holes in the strip materials to be exposed into the vacuum processing chamber through the micro cracks, and enabling the strip materials to be internally and externally discharged with gas and water at the same time;
the feeding and extruding chamber is maintained, cleaned or overhauled through an openable first door body which is hermetically arranged on one side of the feeding and extruding chamber;
performing maintenance, cleaning or overhaul of the vacuum processing chamber through an openable second door body hermetically installed at one side of the vacuum processing chamber;
the extrusion feed chamber is maintained, cleaned or overhauled by an openable third door body which is mounted in a sealed manner on one side of the extrusion feed chamber.
In the surface drying step, the temperature in the tunnel type oven is controlled to be 60-100 ℃ for hot air drying, so that the residual moisture of the glass magnesium board subjected to thickness fixing treatment is removed, the surface is dried and shaped, and the time for the glass magnesium board to pass through the tunnel type oven is controlled to be 5-30 minutes;
the finished product of the glass magnesium board is a board which has a plurality of composite materials and does not contain a single structural layer of a glass fiber cloth layer, and the surface hardness of the finished product of the glass magnesium board is controlled to be 80-85 HV.
Further, in the material dissolving step, the volume of the solution pool is 100m3, 32 tons of magnesium sulfate heptahydrate powder are injected into the solution pool through a metering pump in the primary material dissolving step, the stirring speed is 150-;
in the step of material preparation, 290Kg of S1 solution is put into a stirring barrel, and 13 to 18Kg of lignin fiber, 1 to 5Kg of magnesium sulfate modifier and 1 to 3Kg of polyacrylamide are put into the stirring barrel to be stirred at the stirring speed of 150 plus 200 rpm for 3 to 5 minutes, so as to obtain the S2 solution;
in the step of high-speed mixing, firstly placing 320-380Kg of magnesium oxide, 50-100Kg of wood powder, 80-150Kg of talcum powder and 3-8Kg of xanthan gum into a high-speed mixer for stirring at the stirring speed of 350-450 rpm for 2-3 minutes, and then pouring the S2 solution into the high-speed mixer for stirring for 3-5 minutes to obtain the gel;
the extrusion curing step is carried out after the kneading and banburying step and the vacuum dehumidification step are carried out in sequence,
an extrusion curing step, in the process of extruding and pushing the raw materials for extrusion molding through an extrusion molding pushing screw, mixing, banburying and shearing the raw materials for extrusion molding in an extruder barrel, mixing the raw materials for extrusion molding in the extruder barrel into a raw material cluster with high fluidity under the action of high shearing force due to rapid reduction of viscosity of xanthan gum in the raw materials for extrusion molding, after the raw material cluster enters an extrusion die head and is extruded from the extrusion die head, rapidly increasing the viscosity of the xanthan gum in the raw material cluster due to disappearance of shearing force to show pseudoplasticity, further extruding and molding to obtain the primarily cured and basically shaped magnesium oxide plate blank, wherein the temperatures of an extrusion feeding chamber, the extruder barrel and the extrusion die head are all set to be 20-30 ℃;
in the thickness fixing treatment step, the thickness of the glass magnesium board obtained after the thickness fixing treatment is equal to or close to that of a finished product glass magnesium board, and the mass density is 1.4 +/-0.1 g/mm 3;
a cutting step, cutting the magnesium oxide board obtained after the thickness setting treatment by using a cutting device to obtain a magnesium oxide board with a set length specification, wherein the length specification is the length specification of the raw material board, for example, the magnesium oxide board obtained by cutting is 2.4 meters long and 1.2 meters wide and is used as the raw material board for processing other boards;
in the surface drying step, hot air with the temperature controlled between 80 and 90 ℃ is used for drying in a tunnel type drying oven, the glass magnesium board subjected to natural curing treatment is subjected to surface drying treatment through the tunnel type drying oven, the time of the tunnel type drying oven is controlled between 5 and 10 minutes, and water in the tunnel type drying oven is pumped out through an air extractor;
in the maintenance treatment step, the surface-dried glass magnesium board is sucked and removed through a vacuum chuck, stacked to a tray and then sent to a maintenance room for maintenance, the temperature of the maintenance room is controlled to be 40-60 ℃, and the glass magnesium board is pushed out of the maintenance room after being maintained for 24 hours by the maintenance room;
a natural curing step, wherein the natural curing treatment is carried out for 5 to 7 days after the curing treatment step, so that the surface hardness is controlled to be 80 to 85 HV;
and the step of finishing the product to obtain the finished product of the glass magnesium board.
According to another technical scheme, the production method of the multilayer composite glass magnesium board comprises the following steps of producing a finished glass magnesium board, and producing the finished glass magnesium board by using the production method of the glass magnesium board;
and compounding, namely compounding at least one surface wear-resistant layer and a decorative layer above the finished glass magnesium board, and compounding at least one of a solid wood layer, a soft cushion layer, a mute layer, a waterproof layer and a balance paper layer above and/or below the finished glass magnesium board, wherein the surface wear-resistant layer is positioned on the top layer of the multilayer composite glass magnesium board, and the decorative layer is compounded below the surface wear-resistant layer to obtain the multilayer composite glass magnesium board.
Further, in the compounding step, at least one of the solid wood layer, the soft cushion layer, the waterproof layer and the mute layer is compounded above the finished glass magnesium board, and at least one of the solid wood layer, the soft cushion layer, the waterproof layer, the mute layer and the balance paper layer is compounded below the finished glass magnesium board;
the finished glass magnesium board is used as a substrate layer of the multilayer composite glass magnesium board or one material layer except the substrate layer;
the decorative layer comprises a pattern paper layer, a solid wood sheet layer, a ceramic tile layer or a PVC color film layer;
the compounding comprises a hot-pressing compounding mode, a viscose compounding mode, a spraying compounding mode and an in-mold forming compounding mode which uses a mold for integral forming;
the surface wear-resistant layer is at least one of a melamine impregnated paper layer or a wear-resistant paper layer, an aluminum oxide wear-resistant layer, a UV paint wear-resistant layer and a PVC wear-resistant sheet which are compounded on the top surface of the multilayer composite glass-magnesium plate;
the produced multilayer composite glass magnesium plate comprises one of the following three structures according to the structural distinction,
1) the multilayer composite glass magnesium board comprises a surface wear-resistant layer arranged on the topmost layer, a decorative layer compounded below the surface wear-resistant layer and a finished glass magnesium board arranged at the bottommost layer, wherein at least one of a solid wood layer, a soft cushion layer, a silencing layer, a waterproof layer and a balance paper layer is compounded between the decorative layer and the finished glass magnesium board;
2) the multilayer composite glass magnesium board comprises a surface wear-resistant layer arranged on the topmost layer, a decorative layer compounded below the surface wear-resistant layer and a finished glass magnesium board compounded below the surface wear-resistant layer, wherein at least one of a solid wood layer, a soft cushion layer, a mute layer, a waterproof layer and a balance paper layer is compounded below the finished glass magnesium board;
3) the multilayer composite glass magnesium board comprises a surface wear-resistant layer arranged on the topmost layer, a decorative layer compounded below the surface wear-resistant layer and a finished glass magnesium board arranged in the middle, wherein at least one of a solid wood layer, a soft cushion layer, a mute layer, a waterproof layer and a balance paper layer is compounded above and below the finished glass magnesium board respectively;
the obtained multi-layer composite glass magnesium board is distinguished according to the use type and comprises a floor or a wallboard.
Compared with the prior art, the invention has the advantages that: the invention realizes the continuous production of the glass magnesium board, has short curing time in the production process, high production efficiency and low production cost, the produced glass magnesium board does not contain glass fiber cloth, the production is simpler, and the thickness error of the produced glass magnesium board is extremely small, the size is stable and the structural strength is high.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic process flow diagram of the present invention.
FIG. 2 is a schematic structural diagram of a thickness setting process using a thickness setting roller set according to the present invention.
Fig. 3 is a schematic structural view of the present invention for performing a thickness fixing process using a blade-type endless track.
Fig. 4 is a schematic view of the structure of the kneading apparatus of the present invention.
The labels in the figure are:
1 vacuum processing device 11 vacuum processing chamber 12 divides the material and extrudes the material hole 14 and feeds and extrudes the material room of the material screen 13.
2 screw extrusion moulding mechanism 21 extrusion die 22 extrusion feed chamber 23 extrusion cylinder 24 extrusion moulding push screw 25 feed hopper.
And 3, a tunnel type oven.
The 4-thickness-fixed frame 41 is provided with a pressing piece type circulating crawler 42, a pressing roller 43 and a belt pressing roller 44, a kneading discharge barrel 45 is used for kneading the mixing chamber 46, a kneading rod 47 is used for kneading the discharge screw.
5, a magnesium oxide board blank.
Detailed Description
Example one
The production method of the magnesium oxide board, shown in figures 1 to 4, comprises the following steps,
a dissolving step, pouring magnesium sulfate heptahydrate which is in a crystalline powder physical state into a solution pool filled with water, stirring and dissolving to obtain a magnesium sulfate solution serving as an S1 solution for later use, wherein the mass concentration of the magnesium sulfate heptahydrate of the S1 solution is 26-30g/100 ml; preferably, the water temperature of the solution pool is controlled to be 20-30 ℃, and the weight ratio of magnesium sulfate heptahydrate to water is controlled to be 1: 3-4.
And a material mixing step, namely pouring the S1 solution into a stirring barrel, and then adding the lignin fiber, the magnesium sulfate modifier and the polyacrylamide, wherein the weight ratio of the S1 solution to the lignin fiber to the magnesium sulfate modifier to the polyacrylamide is 1: 3%: 0.2-2%: 0.2-1%, stirring for 1-20 min to obtain S2 solution, and uniformly dispersing the lignin fiber in the S2 solution; preferably, the S1 solution, the lignin fiber, the magnesium sulfate modifier and the polyacrylamide are stirred for 10-15 minutes to obtain an S2 solution, the polyacrylamide has high compatibility with the magnesium sulfate in the S1 solution and low content of the polyacrylamide, the polyacrylamide reacts with water to form a network node through mechanical entanglement among chains and hydrogen bonds, and the low-concentration polyacrylamide in the S2 solution forms a polymer solution with a network structure in a gel state, wherein the physical state of the polymer solution is the gel state, and the polyacrylamide is selected from anionic polyacrylamide with the molecular weight of 1000-2000 ten thousand.
A high-speed mixing step, namely firstly putting magnesium oxide, wood powder, talcum powder and xanthan gum into a high-speed mixer to be stirred for 1-5 minutes, then pouring the S2 solution into the high-speed mixer to be stirred for 1-20 minutes, so that the raw materials in the high-speed mixer are converted into mud-shaped or small-ball-shaped gel, the gel comprises gel formed by xanthan gum and polyacrylamide, lignin fiber and wood powder which are uniformly distributed and wrapped in the gel, and the water content of the gel is controlled to be 25-30%; preferably, the raw materials are stirred for 3-5 minutes after S2 is poured into the high-speed mixer to be dissolved, the raw materials are stirred to be initially agglomerated in the high-speed mixer in the high-speed mixing step, sol molecules of xanthan gum form spiral interpolymer of a super-bonding belt shape during the high-speed stirring process to form a net-shaped structure body, and the net-shaped structure body of xanthan gum and the net-shaped structure body of polyacrylamide are mutually staggered in a three-dimensional space to realize the wrapping of lignin fiber and wood flour and the coagulation to form a plurality of relatively separated small-packed or small-blocky gel bodies.
In a preferred embodiment, the specific examples of the dissolving step, the blending step and the high-speed mixing step are as follows:
in the step of dissolving, the volume of the solution pool is 100m3In the first material dissolving step, 32 tons of magnesium sulfate heptahydrate powder are injected into the solution pool through a metering pump, the stirring speed is 150-200 r/min, and the stirring time is 10-40 min, so as to obtain an S1 solution.
In the step of material preparation, 290Kg of S1 solution is placed into a stirring barrel, and 13 to 18Kg of lignin fiber, 1 to 5Kg of magnesium sulfate modifier and 1 to 3Kg of polyacrylamide are placed into the stirring barrel for stirring at the stirring speed of 150-.
In the high-speed mixing step, firstly, 380Kg of magnesium oxide (320-), 50-100Kg of wood powder, 80-150Kg of talcum powder and 3-8Kg of xanthan gum are put into a high-speed mixer to be stirred, the stirring speed is 350-.
A kneading and banburying step, namely conveying the gel obtained in the high-speed mixing step to kneading equipment, and kneading and banburying the gel through a kneading rod 46 of the kneading equipment until the gel is kneaded to form a plurality of dough-shaped raw materials with plasticity and viscosity; preferably, the kneading device is provided with a kneading and mixing chamber 45, two kneading rods 46 with opposite rotation directions are installed in the kneading and mixing chamber 45, the two kneading rods 46 are respectively provided with at least one kneading part protruding in the radial direction, the corresponding kneading parts of the two kneading rods 46 are adjacently arranged along the axial direction and are in clearance fit, the outer sides of the kneading parts are respectively in clearance fit with the inner wall of the kneading and mixing chamber 45, gel is put into the kneading and mixing chamber 45, and the gel is continuously kneaded by the two kneading rods 46 to obtain a bulk raw material, and the average diameter of the bulk raw material is larger than 10 cm. Specifically, a low shearing effect is generated on xanthan gum in gel during kneading and banburying, the xanthan gum in the gel forms network rubber ribs with dense grids, the network rubber ribs are uniformly and densely distributed in each area of the bulk raw material, the network rubber ribs and a polyacrylamide network structure body wrap gas and water generated by the bulk raw material, and densely distributed air holes are formed in the bulk raw material.
Wherein the kneading equipment comprises high-speed kneading equipment and low-speed kneading equipment, the gel is firstly conveyed to the high-speed kneading equipment for high-speed kneading and banburying, the rotating speed of a kneading rod 46 of the high-speed kneading equipment is 300-600 revolutions per minute, the gel is quickly agglomerated through high-speed kneading and banburying, dense network rubber ribs are quickly formed, the kneading time is reduced, the production efficiency is improved, the gel is further conveyed to low-speed kneading equipment for low-speed kneading and banburying through high-speed kneading and banburying, the rotating speed of a kneading rod 46 of the low-speed kneading equipment is 30-250 revolutions per minute, the low-speed kneading and banburying improves the kneading effect, the distribution of the generated network rubber ribs is more uniform, and the criss-cross network rubber ribs can be mutually connected, thereby forming a network rubber rib structure with larger volume scale, wherein the rotating speed of the kneading rod 46 of the low-speed kneading equipment is lower than that of the kneading rod 46 of the high-speed kneading equipment; in the kneading and banburying steps, firstly, the gel is kneaded to a state that the gel is initially agglomerated by high-speed kneading equipment, and then, the kneading is continued by low-speed kneading equipment, so that the continuous output of the agglomerated raw materials is ensured while the kneading effect is improved.
A kneading output mechanism is respectively arranged below the kneading devices, the kneading output mechanism comprises a kneading discharge barrel 44 and a kneading discharge screw 47 arranged in the kneading discharge barrel 44, the upper side of the kneading discharge barrel 44 is provided with a kneading feed inlet communicated with a kneading mixing chamber 45 of the kneading devices, and the other side of the kneading discharge barrel is provided with a kneading discharge outlet; the high-speed kneading equipment is fixed at the upper side of the low-speed kneading equipment, a kneading discharge port of a kneading output mechanism fixed below the high-speed kneading equipment extends to the upper part of a kneading and banburying chamber 45 of the low-speed kneading equipment, and the gel is subjected to high-speed kneading and banburying treatment and then is continuously conveyed to the low-speed kneading equipment for low-speed kneading and banburying treatment; until a plurality of dough-shaped raw materials with plasticity and viscosity are formed in the kneading and mixing chamber 45 of the low-speed kneading equipment, the dough-shaped raw materials are continuously output to the vacuum treatment chamber 11 through the low-speed kneading equipment so as to realize continuous output of the dough-shaped raw materials and realize continuous feeding and continuous production.
And a vacuum dehumidification step of conveying the dough-like material to the vacuum treatment chamber 11, performing vacuum treatment in the vacuum treatment chamber 11, removing gas and moisture in the dough-like material, discharging the dough-like material from the vacuum treatment chamber 11 to obtain an extrusion-molding material, and controlling the moisture content of the extrusion-molding material to be 25% or less.
Specifically, the dough raw material is continuously extruded towards the vacuum processing chamber 11 through a feeding extrusion chamber 14 which is hermetically arranged above the vacuum processing chamber 11; the method comprises the following steps of enabling a bulk raw material to downwards pass through a material distributing and extruding screen plate 12 which is arranged in a feeding and extruding chamber 14 or a vacuum processing chamber 11 and is provided with a plurality of extruding holes 13, continuously and downwards extruding the bulk raw material from each extruding hole 13 to obtain a plurality of strip-shaped materials, enabling gas and water contained in the bulk raw material to be released into the vacuum processing chamber 11, and sealing and separating the feeding and extruding chamber 14 and the vacuum processing chamber 11 through the material distributing and extruding screen plate 12 and the strip-shaped materials which are extruded in each extruding hole 13; the strip is passed down through the vacuum treatment chamber 11 and gas and moisture are evacuated through the vacuum treatment chamber 11.
And an extrusion curing step, namely conveying the raw materials for extrusion molding to a screw extrusion molding mechanism 2, continuously extruding and molding at normal temperature, continuously extruding the sheet-shaped magnesium oxide board blank 5 through an extrusion die head 21 of the screw extrusion molding mechanism 2, primarily curing and basically shaping the extruded magnesium oxide board blank 5 through extrusion molding by using polyacrylamide and xanthan gum, wherein the surface hardness of the extruded magnesium oxide board blank 5 reaches Shore hardness of 30-35 degrees, and the water content of the magnesium oxide board blank 5 is controlled to be below 20%.
Specifically, the extrusion feed chamber 22 of the screw extrusion molding mechanism 2 is hermetically installed below the vacuum processing chamber 11, so that the strip-shaped materials passing through the vacuum processing chamber 11 respectively fall into the extrusion feed chamber 22, and the raw materials for extrusion molding are obtained in the extrusion feed chamber 22; an extrusion machine barrel 23 is arranged in the middle of the screw extrusion molding mechanism 2, the rear side of an extrusion molding pushing screw 24 rotatably arranged in the extrusion machine barrel 23 extends into an extrusion feed chamber 22, the front side is adjacent to an extrusion die head 21 arranged on the front side of the screw extrusion molding mechanism 2, the extrusion molding raw material continuously falling into the extrusion feed chamber 22 is pushed out of the extrusion feed chamber 22 by the extrusion molding pushing screw 24 extending into the extrusion feed chamber 22 and is fed into the extrusion machine barrel 23, and the extrusion molding pushing screw 24 continuously pushes the extrusion molding raw material in the feed chamber; at normal temperature, the extrusion molding raw materials entering the extrusion cylinder 23 are mixed into a mass through the extrusion and conveying action and the mixing action of the extrusion molding push screw 24, and finally the mass is continuously extruded through the extrusion die head 21 to obtain the magnesium oxide board blank 5, wherein the temperature in the extrusion cylinder 23 and the extrusion temperature of the extrusion die head 21 are both controlled at 20-30 ℃.
Preferably, the vacuum dehumidification step and the extrusion curing step are sequentially realized through a dehumidification extrusion compounding device. Specifically, a feed hopper 25 is installed at the rear side of the screw extrusion molding mechanism 2, the inner cavity of the feed hopper 25 is set as an extrusion feed chamber 22, a vacuum processing device 1 is hermetically installed above the feed hopper 25, the inner cavity of the vacuum processing device 1 is set as a vacuum processing chamber 11, an extrusion device is hermetically installed above the vacuum processing device 1, the inner cavity of the extrusion device is set as a feeding extrusion chamber 14, the vacuum processing chamber 11 and the extrusion feed chamber 22 are vertically aligned, the upper part of the vacuum processing chamber 11 is communicated with the lower part of the feeding extrusion chamber 14, and the lower part of the vacuum processing chamber 11 is communicated with the extrusion feed chamber 22; the extruding device, the vacuum processing device 1 and the screw extrusion molding mechanism 2 which are assembled into a whole form dehumidification extrusion composite equipment which is used for sequentially realizing the vacuum dehumidification step and the extrusion curing step and realizing continuous production.
The dough raw materials are conveyed to an extruding device, and are extruded downwards in a feeding and extruding chamber 14 through an extruder arranged in the feeding and extruding chamber 14; the raw material of the globs passes through the material extruding holes 13 of the material separating and extruding screen plate 12 and is extruded downwards to form and enter the vacuum processing chamber 11. Specifically, the bulk raw material is continuously fed from an upper opening of the feeding and extruding chamber 14, and is pushed downwards into an extruding channel arranged below the extruding screw by an extruding screw installed in the feeding and extruding chamber 14, so that the bulk raw material downwards passes through a material distributing and extruding screen plate 12 arranged in the extruding channel or below the extruding channel, the bulk raw material is stacked above the material distributing and extruding screen plate 12 by a set height and a set extrusion force, and the upper space of the material distributing and extruding screen plate 12 is sealed by the bulk raw material which is extruded and stacked above the material distributing and extruding screen plate 12.
The upper part of the vacuum processing chamber 11 is sealed at the material distributing and extruding screen plate 12 through the bulk raw material piled above the material distributing and extruding screen plate 12 and the strip-shaped material which is squeezed and filled in each extruding hole 13, and each strip-shaped material is sucked downwards under the assistance of the negative pressure environment of the vacuum processing chamber 11; the material-distributing and material-extruding screen plate 12 extrudes the bulk material into a plurality of strip-shaped materials which are continuous in length, smaller in transverse section, larger in surface area and distributed at intervals, and continuously extrudes the strip-shaped materials towards the vacuum processing chamber 11, and each strip-shaped material downwards passes through the vacuum processing chamber 11 with a set height under the action of self weight.
Specifically, the vacuum degree of the vacuum processing chamber 11 is controlled to be 0.8-1.5MPa, after the bulk raw material is extruded through the extrusion holes 13 and is converted into a plurality of strip-shaped materials, the air holes in the bulk raw material are dispersed and wrapped in the corresponding strip-shaped materials, the volume of the air holes in the strip-shaped materials is reduced, the pressure is increased, after the strip-shaped materials enter the vacuum processing chamber 11, the air pressure outside the strip-shaped materials is far smaller than the pressure in the air holes in the strip-shaped materials, the air holes in the strip-shaped materials are respectively expanded and broken, the strip-shaped materials are distributed with micro cracks inside and outside, the air and water diameters in the air holes in the strip-shaped materials are exploded into the vacuum processing chamber 11 through the micro cracks, the vacuum degree of the vacuum processing chamber 11 is controlled to be 0.5-2MPa, the air and water in the strip-shaped materials are simultaneously and rapidly discharged outside and inside the strip-shaped materials, and the air and water in the vacuum processing chamber 11 are continuously pumped by an air extractor connected with the vacuum processing chamber 11, and are extruded and pushed into the strip-shaped feeding barrel of the extrusion screw 24 The materials are mixed into a mass by the stirring and mixing action of the extrusion molding pushing screw 24, and are subjected to compression treatment, kneading treatment and shearing treatment in the extruder barrel 23 as the extrusion molding pushing screw 24 is continuously pushed forward, and are continuously extruded through the extrusion die 21.
Specifically, the extrusion molding raw material is mixed, internally mixed and sheared in the extrusion cylinder 23 in the process of extruding and pushing the extrusion molding raw material by the extrusion molding pushing screw 24, the extrusion molding raw material in the extrusion cylinder 23 is mixed into a high-fluidity raw material cluster due to the fact that the viscosity of the xanthan gum is rapidly reduced under the action of high shearing force, after the raw material cluster enters the extrusion die head 21 and is extruded from the extrusion die head 21, the viscosity of the xanthan gum is rapidly increased due to disappearance of shearing force, pseudoplasticity is presented, then the primary solidified and basically shaped magnesium oxide plate blank 5 is obtained by extrusion molding, the temperatures of the extrusion feeding chamber 22, the extrusion cylinder 23 and the extrusion die head 21 are all set to be 20-30 ℃, heating is not needed, the processing energy consumption is low, and the primary solidified plate immediately after extrusion molding is ensured.
Preferably, the feeding extrusion chamber 14 is maintained, cleaned or overhauled by an openable first door body hermetically installed at one side of the feeding extrusion chamber 14, the vacuum treatment chamber 11 is maintained, cleaned or overhauled by an openable second door body hermetically installed at one side of the vacuum treatment chamber 11, and the extrusion feed chamber 22 is maintained, cleaned or overhauled by an openable third door body hermetically installed at one side of the extrusion feed chamber 22.
And a thickness fixing treatment step, namely performing thickness fixing treatment on the magnesium oxide board blank 5 through at least one thickness fixing rolling device, wherein the thickness fixing rolling device selects at least one of a thickness fixing belt pressure feeding mechanism, a thickness fixing roller set and a tabletting type circulating crawler belt 41, after the thickness fixing treatment, a magnesium oxide board with a set thickness is obtained, the water content of the magnesium oxide board is controlled to be below 18%, and the surface hardness of the magnesium oxide board reaches Shore hardness of 40-45 degrees.
The method for carrying out thickness setting treatment on the magnesium oxide board blank 5 by the thickness setting belt pressing and conveying mechanism is to press and convey the magnesium oxide board blank 5 forwards by a circulating conveying belt arranged on a thickness setting machine frame 4, and extrude and roll the magnesium oxide board blank 5 by the circulating conveying belt in the conveying process;
the magnesium oxide board blank 5 is subjected to thickness setting treatment by a thickness setting belt pressing mechanism, an upper circulating conveyor belt and a lower circulating conveyor belt are mounted on a thickness setting machine frame 4, a belt pressing channel which penetrates through the two circulating conveyor belts front and back is formed between the two circulating conveyor belts, and the magnesium oxide board blank 5 is pressed through the belt pressing channel and the magnesium oxide board blank 5 by the upper circulating conveyor belt and the lower circulating conveyor belt of the belt pressing channel by pressing rollers or pressing plates mounted on the upper side and the lower side of the belt pressing channel.
Preferably, the method for performing the thickness setting treatment on the magnesium oxide board blank 5 through the thickness setting press roll sets is to roll and convey the magnesium oxide board blank 5 through a plurality of thickness setting press roll sets installed on the thickness setting machine frame 4, forward press-feed the magnesium oxide board blank 5 through the thickness setting press roll sets, and roll the magnesium oxide board blank 5 through the thickness setting press roll sets during the press-feed process.
The thickness of the glass magnesium board blank is determined by the thickness determining press roll group, the glass magnesium board blank 5 sequentially passes through the plurality of thickness determining press roll groups, one thickness determining press roll group comprises two press rolls 42 which are arranged on the thickness determining machine frame 4 and are vertically aligned, and the rotating directions of the two press rolls are opposite, so that the glass magnesium board blank 5 synchronously rolls the upper surface and the lower surface of the glass magnesium board blank 5 by the upper press roll 42 and the lower press roll 42 of each thickness determining press roll group in sequence, the press plate interval between the upper press roll 42 and the lower press roll 42 of each thickness determining press roll group along the advancing direction of the glass magnesium board blank 5 is gradually reduced, the glass magnesium board blank 5 is gradually compressed in a grading manner, and finally the glass magnesium board blank 5 is completely shaped.
Preferably, the magnesium board blank 5 is thicknessed by the sheeter endless track 41 by feeding the magnesium board blank 5 forward by at least one sheeter endless track 41 installed on the thicknessing machine frame 4, and pressing the magnesium board blank 5 by the sheeter endless track 41 during the feeding of the magnesium board blank 5.
The thickness of the magnesium oxide board blank 5 is reduced by rolling of a fixed-thickness press roll group or extrusion of a tabletting type circulating crawler 41, the thick press roll 42 group and the tabletting type circulating crawler 41 can be matched for thickness fixing treatment, the thickness of the magnesium oxide board blank 5 is controlled within a set error range in the thickness fixing treatment step, meanwhile, extrusion drainage and accelerated curing and shaping speed are realized, the thickness of the obtained magnesium oxide board is equal to or close to that of a finished magnesium oxide board, the width of the magnesium oxide board blank 5 is limited by fixed-width boards arranged on the left side and the right side of a fixed-thickness machine frame 4, the thickness of the magnesium oxide board obtained after thickness fixing treatment is equal to or close to that of the finished magnesium oxide board, and the mass density is 1.4 +/-0.1 g/mm3And controlling the thickness error of the magnesium oxide board obtained after the thickness setting treatment to be less than 0.5 percent.
The thickness fixing treatment is carried out through a sheet pressing type circulating crawler 41, the sheet pressing type circulating crawler 41 is installed on the first side of a thickness fixing machine frame 4, a front-back penetrating press plate channel is arranged in the middle of the thickness fixing machine frame, a thickness fixing belt pressing mechanism, a press roller 42 or the sheet pressing type circulating crawler 41 is installed on the second side of the thickness fixing machine frame, the magnesium oxide board blank 5 is conveyed and extruded forwards through the press plate channel arranged in the middle of the thickness fixing machine frame, the sheet pressing type circulating crawler 41 is formed by sequentially connecting a plurality of press sheets, the width of each press sheet is larger than the width of the magnesium oxide board blank 5, the length of each press sheet is 3-20cm, one side of the sheet pressing type circulating crawler 41, which is used for pressing the magnesium oxide board blank 5, is set to be a press plate side, the inner side of the press plate side is used for pressing the magnesium oxide board blank 5, and at least one press roller 43 is arranged on the outer side of the press plate side.
Preferably, two sets of upper and lower preforming formula circulation track 41 are installed at thicknessing frame 4, be provided with a clamp plate passageway between two sets of upper and lower preforming formula circulation track 41, the sheeter chooses the sheeter for use, preforming formula circulation track 41 is the endless conveyor that a plurality of sheeters connect in order and form, the outside on the clamp plate side of two sets of upper and lower preforming formula circulation track 41 sets up a plurality of pinch rolls 43 at the interval respectively, the pinch rolls 43 of the corresponding position of two sets of upper and lower preforming formula circulation track 41 vertically aligns, send into the clamp plate passageway with glass magnesium board embryonic plate 5, extrude glass magnesium board embryonic plate 5 simultaneously and carry glass magnesium board embryonic plate 5 forward through two sets of upper and lower preforming formula circulation track 41.
The thickness setting belt pressure feed mechanism, the thickness setting press roller group, and the sheeter endless track 41 may be used in combination in the thickness setting process.
And a cutting step, cutting the magnesium oxide board plate obtained after the thickness setting treatment through cutting equipment to obtain the magnesium oxide board plate with the set length specification. The length specification is a length specification of a raw material plate, and for example, a magnesium oxide plate material having a length of 2.4 m and a width of 1.2 m is cut out and used as a raw material plate for processing other plate materials.
And a surface drying step, namely conveying the glass magnesium board forward, enabling the glass magnesium board to pass through a tunnel type oven 3, and drying the surface of the glass magnesium board through the tunnel type oven 3 to obtain the cured glass magnesium board, wherein the water content of the glass magnesium board after surface drying is controlled to be below 15%, the surface hardness reaches 60-65 degrees, and the bending strength reaches 15-18 MPa. Preferably, the temperature in the tunnel oven 3 is controlled to be 60-100 ℃ for hot air drying, so as to remove the residual moisture of the magnesium oxide board after the thickness setting treatment, dry and set the surface of the magnesium oxide board, and control the time for the magnesium oxide board to pass through the tunnel oven 3 to be 5-30 minutes. Preferably, the temperature in the tunnel type oven 3 is controlled to be 80-90 ℃ for hot air drying, the naturally cured magnesium oxide board is subjected to surface drying treatment by the tunnel type oven 3, the time of passing through the tunnel type oven 3 is controlled to be 5-10 minutes, and the moisture in the tunnel type oven 3 is pumped out by an air exhaust device.
A maintenance treatment step, in which the glass magnesium board is maintained; specifically, the glass magnesium board subjected to surface drying treatment is sucked and removed through a vacuum chuck, stacked to a tray and then sent to a curing room for curing, the temperature of the curing room is controlled to be 40-60 ℃, and the glass magnesium board is pushed out of the curing room after being cured for 24 hours in the curing room.
And a natural curing step, wherein the natural curing treatment is carried out for 5 to 7 days after the curing treatment step, so that the surface hardness of the material is controlled to be 80 to 85 HV.
And a finished product step, namely obtaining a finished product glass magnesium board without the glass fiber cloth layer after the curing treatment step, wherein the surface hardness of the finished product glass magnesium board is controlled to be more than 80HV, and the bending strength reaches more than 20 MPa. For example, the surface hardness of the finished product of the glass magnesium board is controlled to be 80-85HV after the natural curing treatment step, and the surface hardness of the finished product of the glass magnesium board is 80-85 HV.
Preferably, the finished glass magnesium board is a board with a single structural layer and various composite materials, and the glass fiber cloth layer is not contained, and the surface hardness of the finished glass magnesium board is controlled to be 80-85 HV. The obtained finished glass magnesium board can be a solid board or a hollow board with a plurality of through holes arranged at intervals.
The mass parameter ratio of the produced glass fiber-magnesium board is shown in table 1, compared with the glass fiber cloth-containing glass fiber-magnesium board produced by the traditional method.
Parameter comparison Surface hardness Bending strength Water absorption rate
Traditional method for producing glass fiber-containing cloth 70-75 18MPa 10-12％
The invention 80-85 22MPa 3-5％
TABLE 1 comparison of quality parameters
The production efficiency and the production period of the glass fiber cloth-containing magnesium oxide board produced by the method are shown in table 2.
Figure BDA0003083877340000231
TABLE 2 comparison of production efficiency cycles
Example two
The production method of the multilayer composite glass magnesium plate comprises the following steps,
and (3) a finished product of the magnesium oxide board is produced by the method comprising the step of producing the magnesium oxide board in the embodiment I. If the length and width of the multi-layer composite glass magnesium board to be produced is smaller than the length and width of the finished glass magnesium board, the finished glass magnesium board is cut according to the length and width of the board to be produced, for example, the finished glass magnesium board is cut into small boards with the length of 60cm and the width of 60cm, and then the subsequent composite step or other processing steps are carried out.
And compounding, namely compounding at least one surface wear-resistant layer and a decorative layer above the finished glass magnesium board, wherein the surface wear-resistant layer is positioned on the top layer of the multilayer composite glass magnesium board, and the decorative layer is compounded below the surface wear-resistant layer.
At least one of a solid wood layer, a soft cushion layer, a mute layer, a waterproof layer and a balance paper layer is compounded above or below the finished glass magnesium board, or at least one of a solid wood layer, a soft cushion layer, a mute layer, a waterproof layer and a balance paper layer is compounded above or below the finished glass magnesium board respectively, so that the multilayer glass composite magnesium board is obtained.
The finished glass magnesium board is used as a substrate layer of the multilayer composite glass magnesium board or one material layer except the substrate layer. Preferably, at least one of a solid wood layer, a soft cushion layer, a waterproof layer and a mute layer is compounded above the finished glass magnesium board, at least one of the solid wood layer, the soft cushion layer, the waterproof layer, the mute layer and a balance paper layer is compounded below the finished glass magnesium board, and the finished glass magnesium board is used as a base material layer of the multilayer composite glass magnesium board.
The decorative layer comprises a pattern paper layer, a solid wood sheet layer, a ceramic tile layer or a PVC color film layer.
The compounding comprises a hot-pressing compounding mode, a viscose compounding mode, a spraying compounding mode and an in-mold forming compounding mode which uses a mold for integral forming; the surface wear-resistant layer is a melamine impregnated paper layer or a wear-resistant paper layer compounded on the top surface of the multilayer composite type glass magnesium board, and can also be at least one of an aluminum oxide wear-resistant layer, a UV paint wear-resistant layer and a PVC wear-resistant sheet compounded on the top surface of the multilayer composite type glass magnesium board,
The obtained multilayer composite glass magnesium board is distinguished according to the use types and comprises a floor or a wallboard, namely, the finished glass magnesium board can be used as a base material or one material layer in the prior art by using various processing technologies and is made into the floor or the wallboard.
The multi-layer composite type glass magnesium plate produced by the production method of the multi-layer composite type glass magnesium plate of the second embodiment comprises the following three structures according to the structural distinction,
1) the multilayer composite glass magnesium board comprises a surface wear-resistant layer arranged on the topmost layer, a decorative layer compounded below the surface wear-resistant layer and a finished glass magnesium board arranged at the bottommost layer, wherein at least one of a solid wood layer, a soft cushion layer, a silencing layer, a waterproof layer and a balance paper layer is compounded between the decorative layer and the finished glass magnesium board.
2) The multilayer composite glass magnesium board comprises a surface wear-resistant layer arranged on the topmost layer, a decorative layer compounded below the surface wear-resistant layer and a finished glass magnesium board compounded below the surface wear-resistant layer, wherein at least one of a solid wood layer, a soft cushion layer, a mute layer, a waterproof layer and a balance paper layer is compounded below the finished glass magnesium board.
3) The multilayer composite glass magnesium board comprises a surface wear-resistant layer arranged on the topmost layer, a decorative layer compounded below the surface wear-resistant layer and a finished glass magnesium board arranged in the middle, wherein at least one of a solid wood layer, a soft cushion layer, a mute layer, a waterproof layer and a balance paper layer is compounded above and below the finished glass magnesium board respectively.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims (10)

1. The production method of the glass magnesium board is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
a dissolving step, pouring magnesium sulfate heptahydrate which is in a crystalline powder physical state into a solution pool filled with water, stirring and dissolving to obtain a magnesium sulfate solution serving as an S1 solution for later use, wherein the mass concentration of the magnesium sulfate heptahydrate of the S1 solution is 26-30g/100 ml;
and a material mixing step, namely pouring the S1 solution into a stirring barrel, and then adding the lignin fiber, the magnesium sulfate modifier and the polyacrylamide, wherein the weight ratio of the S1 solution to the lignin fiber to the magnesium sulfate modifier to the polyacrylamide is 1: 3%: 0.2-2%: 0.2-1%, stirring for 1-20 min to obtain S2 solution, and uniformly dispersing the lignin fiber in the S2 solution;
a high-speed mixing step, namely firstly putting magnesium oxide, wood powder, talcum powder and xanthan gum into a high-speed mixer to be stirred for 1-5 minutes, then pouring the S2 solution into the high-speed mixer to be stirred for 1-20 minutes, so that the raw materials in the high-speed mixer are converted into mud-shaped or small-ball-shaped gel, the gel comprises gel formed by xanthan gum and polyacrylamide, lignin fiber and wood powder which are uniformly distributed and wrapped in the gel, and the water content of the gel is controlled to be 25-30%;
a kneading and banburying step, namely conveying the gel obtained in the high-speed mixing step to kneading equipment, kneading and banburying the gel through a kneading rod (46) of at least one kneading equipment until the gel is kneaded to form a plurality of dough-shaped raw materials with plasticity and viscosity;
a vacuum dehumidification step of conveying the dough-like material to a vacuum treatment chamber (11), performing vacuum treatment in the vacuum treatment chamber (11), removing gas and moisture in the dough-like material, and discharging the dough-like material from the vacuum treatment chamber (11) to obtain a raw material for extrusion molding, wherein the moisture content of the raw material for extrusion molding is controlled to be less than 25%;
an extrusion curing step, namely conveying the raw materials for extrusion molding to a screw extrusion molding mechanism (2), continuously extruding and molding at normal temperature, continuously extruding a sheet-shaped magnesium oxide board blank (5) through an extrusion die head (21) of the screw extrusion molding mechanism (2), primarily curing and basically shaping the extruded magnesium oxide board blank (5) through extrusion molding by using polyacrylamide and xanthan gum, wherein the surface hardness of the extruded magnesium oxide board blank (5) reaches 30-35 degrees of Shore hardness, and the water content of the magnesium oxide board blank (5) is controlled to be below 20%;
a thickness fixing treatment step, namely performing thickness fixing treatment on the magnesium oxide board blank (5) through at least certain thickness rolling equipment to obtain a magnesium oxide board with a set thickness, controlling the water content of the magnesium oxide board to be below 18%, and controlling the surface hardness of the magnesium oxide board to be 40-45 degrees of Shore hardness;
a surface drying step, namely conveying the glass magnesium board forward, enabling the glass magnesium board to pass through a tunnel type drying oven (3), and carrying out surface drying treatment on the glass magnesium board through the tunnel type drying oven (3) to obtain a cured glass magnesium board, wherein the water content of the glass magnesium board after surface drying is controlled to be below 15%, the surface hardness reaches 60-65 degrees, and the bending strength reaches 15-18 MPa;
a maintenance treatment step, in which the glass magnesium board is maintained;
and a finished product step, namely obtaining a finished product glass magnesium board without the glass fiber cloth layer after the curing treatment step, wherein the surface hardness of the finished product glass magnesium board is controlled to be more than 80HV, and the bending strength reaches more than 20 MPa.
2. The method for producing a magnesium oxide sheet according to claim 1, wherein:
the kneading and banburying step is that the kneading equipment comprises high-speed kneading equipment and low-speed kneading equipment, the gel is conveyed to the high-speed kneading equipment for high-speed kneading and banburying, the gel is conveyed to the low-speed kneading equipment for low-speed kneading and banburying after high-speed kneading and banburying, and the rotating speed of a kneading rod (46) of the low-speed kneading equipment is lower than that of a kneading rod (46) of the high-speed kneading equipment; in the kneading and banburying step, firstly, the gel is kneaded to a state that the gel is initially agglomerated by high-speed kneading equipment, then the gel is continuously kneaded by low-speed kneading equipment until a plurality of agglomerated raw materials with plasticity and viscosity are formed in a kneading and banburying chamber (45) of the low-speed kneading equipment, and the agglomerated raw materials are continuously output to the vacuum treatment chamber (11) by the low-speed kneading equipment so as to realize continuous output of the agglomerated raw materials;
in the thickness-fixing processing step, the thickness-fixing rolling equipment selects at least one of a thickness-fixing belt rolling mechanism, a thickness-fixing roller set and a tabletting type circulating crawler belt (41);
the method for carrying out thickness-fixing treatment on the magnesium oxide board blank (5) by using the thickness-fixing belt pressing and conveying mechanism is characterized in that the magnesium oxide board blank (5) is pressed and conveyed forwards by using a circulating conveying belt arranged on a thickness-fixing rack (4), and the magnesium oxide board blank (5) is extruded and rolled by using the circulating conveying belt in the conveying process;
the method for carrying out thickness-fixing treatment on the magnesium oxide board blank (5) through the thickness-fixing press roll sets is characterized in that the magnesium oxide board blank (5) is forwards pressed and conveyed through the thickness-fixing press roll sets arranged on the thickness-fixing machine frame (4), and the magnesium oxide board blank (5) is rolled through the thickness-fixing press roll sets in the conveying process;
the method for carrying out thickness-fixing treatment on the magnesium oxide board blank (5) through the tablet type circulating crawler (41) is characterized in that the magnesium oxide board blank (5) is forwards pressed and conveyed through at least one tablet type circulating crawler (41) arranged on a thickness-fixing frame (4), and the magnesium oxide board blank (5) is extruded through the tablet type circulating crawler (41) in the conveying process;
the thickness of the magnesium oxide board blank (5) is reduced by rolling of the constant-thickness press roll group or extrusion of the pressing piece type circulating crawler belt (41), the thickness of the magnesium oxide board blank (5) is controlled within a set error range in the constant-thickness processing step, meanwhile, extrusion drainage and solidification setting acceleration are achieved, and the thickness of the obtained magnesium oxide board is equal to or close to the thickness of a finished magnesium oxide board.
3. The method for producing a magnesium oxide sheet according to claim 2, wherein: in the kneading and banburying steps, the rubber is kneaded,
a kneading output mechanism is respectively arranged below the kneading equipment and comprises a kneading discharge barrel (44) and a kneading discharge screw (47) arranged in the kneading discharge barrel (44), the upper side of the kneading discharge barrel (44) is provided with a kneading feed inlet communicated with the kneading mixing chamber (45) of the kneading equipment, and the other side of the kneading discharge barrel is provided with a kneading discharge outlet;
the high-speed kneading equipment is fixed at the upper side of the low-speed kneading equipment, a kneading discharge port of a kneading output mechanism fixed below the high-speed kneading equipment extends to the upper part of a kneading and banburying chamber (45) of the low-speed kneading equipment, and the gel is subjected to high-speed kneading and banburying treatment and then is continuously conveyed to the low-speed kneading equipment for low-speed kneading and banburying treatment;
the rotating speed of the kneading rod (46) of the high-speed kneading equipment is 300-600 revolutions per minute, and the rotating speed of the kneading rod (46) of the low-speed kneading equipment is 30-250 revolutions per minute;
in the step of the thickness-fixing treatment,
the thickness is determined by a thickness-determining belt pressing and conveying mechanism, an upper circulating conveying belt and a lower circulating conveying belt are mounted on the thickness-determining frame (4), a belt pressing and conveying channel which penetrates through the two circulating conveying belts is formed between the two circulating conveying belts, and the upper circulating conveying belt and the lower circulating conveying belt which are positioned on the belt pressing and conveying channel are abutted by pressing rollers or pressing plates mounted on the upper side and the lower side of the belt pressing and conveying channel, so that the magnesium oxide board blank (5) passes through the belt pressing and conveying channel and is extruded by the upper circulating conveying belt and the lower circulating conveying belt of the belt pressing and conveying channel;
the thickness of the glass magnesium board blank is determined by the thickness determining roller group, so that the glass magnesium board blank (5) sequentially passes through a plurality of thickness determining roller groups, one thickness determining roller group comprises two pressing rollers (42) which are arranged on a thickness determining rack (4) at intervals up and down, are vertically aligned and have opposite rotating directions, the glass magnesium board blank (5) synchronously rolls the upper surface and the lower surface of the glass magnesium board blank (5) by the upper pressing roller (42) and the lower pressing roller (42) of each thickness determining roller group in sequence, the pressing plate interval between the upper pressing roller (42) and the lower pressing roller (42) of each thickness determining roller group is gradually reduced along the advancing direction of the glass magnesium board blank (5), the glass magnesium board blank (5) is gradually compressed in a grading manner, and finally the magnesium board blank (5) is completely determined;
the thickness fixing treatment is carried out through a sheet pressing type circulating crawler (41), the sheet pressing type circulating crawler (41) is installed on the first side of a thickness fixing rack (4), a pressing plate channel which penetrates through the middle is arranged in the middle, a pressing roller (42) is installed on the second side, one of a circulating conveying belt or a sheet pressing type circulating crawler (41) is installed on the second side, and a magnesium oxide board blank (5) is conveyed and extruded forwards through the pressing plate channel, wherein the sheet pressing type circulating crawler (41) is formed by sequentially connecting a plurality of pressing sheets, the width of the pressing sheets is larger than that of the magnesium oxide board blank (5), the length of the pressing sheets is set to be 3-20cm, one side, pressed against the magnesium oxide board blank (5), of the sheet pressing type circulating crawler (41) is set to be a pressing plate side, the inner side, against the magnesium oxide board blank (5) and the outer side are provided with at least one belt pressing roller (43);
controlling the thickness error of the glass magnesium board material obtained after the thickness fixing treatment to be below 0.5%;
the width of the magnesium oxide board blank (5) is limited at least by the fixed width boards arranged at the left side and the right side of the fixed thickness frame (4).
4. The method for producing a magnesium oxide sheet according to claim 3, wherein: two sets of pressure piece formula circulation track (41) about installing in deciding thick frame (4), be provided with a clamp plate passageway between two sets of upper and lower pressure piece formula circulation track (41), the sheeter chooses the sheeter for use, the circulation conveyer belt that the sheeter formula circulation track (41) formed for a plurality of sheeters are connected in order, the outside of the clamp plate side of two upper and lower group pressure piece formula circulation track (41) sets up a plurality of pinch rolls (43) at the interval respectively, pinch roll (43) the vertical alignment of corresponding position of two upper and lower group pressure piece formula circulation track (41), send into the clamp plate passageway with glass magnesium board embryonic plate (5), extrude glass magnesium board embryonic plate (5) simultaneously and carry glass magnesium board embryonic plate (5) forward through two sets of upper and lower pressure piece formula circulation track (41).
5. The method for producing a magnesium oxide sheet according to any one of claims 1 to 4, characterized in that: in the vacuum dehumidification step, the dough-shaped raw materials are continuously extruded towards the vacuum treatment chamber (11) through a feeding and extruding chamber (14) which is hermetically arranged above the vacuum treatment chamber (11);
the method comprises the following steps of enabling a bulk raw material to downwards pass through a material distributing and extruding screen plate (12) which is arranged in a feeding and extruding chamber (14) or a vacuum processing chamber (11) and is provided with a plurality of extruding holes (13), continuously and downwards extruding the bulk raw material from the extruding holes (13) to obtain a plurality of strip-shaped materials, enabling gas and water contained in the bulk raw material to be released into the vacuum processing chamber (11), and sealing and separating the feeding and extruding chamber (14) and the vacuum processing chamber (11) through the material distributing and extruding screen plate (12) and the strip-shaped materials which are extruded in the extruding holes (13);
the strip-shaped material downwards passes through a vacuum processing chamber (11), and gas and water are pumped out through the vacuum processing chamber (11);
in the step of extrusion curing, an extrusion feeding chamber (22) of the screw extrusion molding mechanism (2) is hermetically arranged below a vacuum processing chamber (11), so that strip-shaped materials passing through the vacuum processing chamber (11) respectively fall into the extrusion feeding chamber (22) downwards, and the raw materials for extrusion molding are obtained in the extrusion feeding chamber (22);
an extrusion machine barrel (23) is arranged in the middle of the screw extrusion molding mechanism (2), an extrusion die head (21) which is rotatably arranged at the rear side of an extrusion molding pushing screw (24) in the extrusion machine barrel (23) and extends into the extrusion feeding chamber (22) and is arranged at the front side of the screw extrusion molding mechanism (2) adjacent to the front side is arranged at the front side, the extrusion molding raw material continuously falling into the extrusion feeding chamber (22) is pushed out of the extrusion feeding chamber (22) through the extrusion molding pushing screw (24) extending into the extrusion feeding chamber (22) and is fed into the extrusion machine barrel (23), and the extrusion molding pushing screw (24) continuously pushes the extrusion molding raw material in the extrusion feeding chamber;
mixing the extrusion molding raw materials entering the extruder barrel (23) into a mass under the extrusion and mixing actions of the extrusion molding pushing screw (24) at normal temperature, and finally continuously extruding through an extrusion die head (21) to obtain the glass magnesium board blank (5);
wherein the temperature in the extruder cylinder (23) and the extrusion temperature of the extrusion die head (21) are both controlled to be 20-30 ℃.
6. The method for producing a magnesium oxide sheet according to claim 5, wherein: a feed hopper (25) is installed on the rear side of the screw extrusion molding mechanism (2), the inner cavity of the feed hopper (25) is set to be the extrusion feeding chamber (22), a vacuum processing device (1) is installed above the feed hopper (25) in a sealing manner, the inner cavity of the vacuum processing device (1) is set to be the vacuum processing chamber (11), an extruding device is installed above the vacuum processing device (1) in a sealing manner, the inner cavity of the extruding device is set to be the feeding extruding chamber (14), the vacuum processing chamber (11) and the extrusion feeding chamber (22) are vertically aligned, the upper part of the vacuum processing chamber (11) is communicated with the lower part of the feeding extruding chamber (14), and the lower part of the vacuum processing chamber (11) is communicated with the extrusion feeding chamber (22); the extruding device, the vacuum processing device (1) and the screw extrusion molding mechanism (2) which are assembled into a whole form dehumidification extrusion composite equipment which is used for sequentially realizing the vacuum dehumidification step and the extrusion curing step and realizing continuous production;
conveying the bulk raw materials to an extruding device, and extruding and conveying the bulk raw materials in a feeding and extruding chamber (14) downwards through an extruder arranged in the feeding and extruding chamber (14);
the material is extruded and fed by an extruder to enable the bulk raw material to pass through each extruding hole (13) of the material distributing and extruding screen plate (12), and is extruded and molded downwards and enter a vacuum processing chamber (11), the upper part of the vacuum processing chamber (11) is sealed at the material distributing and extruding screen plate (12) by piling the bulk raw material above the material distributing and extruding screen plate (12) and extruding strip-shaped materials filled in each extruding hole (13), and each strip-shaped material is sucked downwards under the assistance of the negative pressure environment of the vacuum processing chamber (11);
the material distributing and extruding screen plate (12) extrudes the bulk raw material into a plurality of strip-shaped materials which are continuous in length, smaller in transverse section, larger in surface area and distributed at intervals, the strip-shaped materials are continuously extruded towards the vacuum processing chamber (11), and each strip-shaped material downwards passes through the vacuum processing chamber (11) with set height under the action of self weight;
continuously exhausting gas and moisture in the vacuum processing chamber (11) by an air exhaust device connected with the vacuum processing chamber (11), and controlling the vacuum degree of the vacuum processing chamber (11) at 0.5-2 MPa;
the strip-shaped materials extruded into the extruder cylinder (23) by the extrusion molding pushing screw (24) are mixed into a cluster by the stirring and mixing action of the extrusion molding pushing screw (24), and are subjected to compression treatment, mixing treatment and shearing treatment in the extruder cylinder (23) along with the continuous forward extrusion of the extrusion molding pushing screw (24), and are continuously extruded through the extrusion die head (21).
7. The method for producing a magnesium oxide sheet according to claim 5, wherein:
in the dissolving step, the water temperature of the solution pool is controlled to be 20-30 ℃, and the weight ratio of the magnesium sulfate heptahydrate to the water is controlled to be 1: 3-4;
in the material preparation step, stirring the S1 solution, the lignin fiber, the magnesium sulfate modifier and the polyacrylamide for 10-15 minutes to obtain an S2 solution, wherein the polyacrylamide has high compatibility with the magnesium sulfate in the S1 solution and low polyacrylamide content, the polyacrylamide reacts with water to form a network node through inter-chain mechanical entanglement and hydrogen bonds, and the low-concentration polyacrylamide in the S2 solution enables the polyacrylamide to form a polymer solution with a network structure in a gel state, wherein the polyacrylamide is selected from anionic polyacrylamide with the molecular weight of 1000-2000 ten thousand;
in the high-speed mixing step, S2 is poured into a high-speed mixer to be dissolved, then the mixture is stirred for 3-5 minutes, the mixture is stirred in the high-speed mixing step until the raw materials in the high-speed mixer are initially agglomerated, sol molecules of xanthan gum form a super-bonding banded spiral copolymer in the high-speed stirring process to form a reticular structure, and the reticular structure of xanthan gum and the reticular structure of polyacrylamide are mutually staggered in a three-dimensional space so as to wrap lignin fiber and wood powder and coagulate to form a plurality of relatively separated small-agglomerated or small-blocky gels;
in the kneading and banburying step, a kneading device is provided with a kneading and banburying chamber (45), two kneading rods (46) with opposite rotation directions are installed in the kneading and banburying chamber (45), the two kneading rods (46) are respectively provided with at least one kneading part protruding in the radial direction, the corresponding kneading parts of the two kneading rods (46) are adjacently arranged along the axial direction and in clearance fit, the outer sides of the kneading parts are respectively in clearance fit with the inner wall of the kneading and banburying chamber (45), gel is put into the kneading and banburying chamber (45) and is continuously kneaded by the two kneading rods (46) to obtain bulk raw materials, and the average diameter of the bulk raw materials is more than 10 cm;
in the kneading and banburying steps, a low shearing effect is generated on xanthan gum in gel during kneading and banburying, the xanthan gum in the gel forms network rubber ribs with dense grids, each area of the bulk raw material is uniformly and densely distributed with the network rubber ribs, the network rubber ribs and a network structure of polyacrylamide wrap gas and moisture generated by the bulk raw material, and densely distributed air holes are formed in the bulk raw material;
in the vacuum dehumidification step, a bulk raw material is continuously fed from an upper opening of a feeding and extruding chamber (14), the bulk raw material is pushed downwards into an extruding channel arranged below the extruding screw through an extruding screw arranged in the feeding and extruding chamber (14), the bulk raw material is enabled to downwards pass through a distributing and extruding screen plate (12) arranged in the extruding channel or below the extruding channel, the bulk raw material is enabled to be stacked at a set height above the distributing and extruding screen plate (12) and to protect a set extrusion force, and the upper side space of the distributing and extruding screen plate (12) is sealed through the bulk raw material which is extruded and stacked above the distributing and extruding screen plate (12);
controlling the vacuum degree of a vacuum processing chamber (11) to be 0.8-1.5MPa, after a bulk raw material is extruded through an extruding hole (13) and is converted into a plurality of strip-shaped materials, dispersing and wrapping air holes in the bulk raw material in each corresponding strip-shaped material, reducing the volume of the air holes in the strip-shaped materials and increasing the pressure, after the strip-shaped materials enter the vacuum processing chamber (11), enabling the air pressure outside the strip-shaped materials to be far smaller than the pressure in the air holes in the strip-shaped materials, enabling the air holes in the strip-shaped materials to be respectively expanded and broken, enabling the inside and the outside of the strip-shaped materials to be distributed with microcracks, enabling the diameters of gas and water in the air holes in the strip-shaped materials to be exposed into the vacuum processing chamber (11) through the microcracks, and enabling the inside and the outside of the strip-shaped materials to simultaneously and rapidly discharge;
the feeding and extruding chamber (14) is maintained, cleaned or overhauled through an openable first door body which is hermetically arranged on one side of the feeding and extruding chamber (14);
performing maintenance, cleaning or overhaul of the vacuum processing chamber (11) through an openable second door body hermetically installed at one side of the vacuum processing chamber (11);
maintaining, cleaning or overhauling the extrusion feed chamber (22) through an openable third door body which is hermetically installed at one side of the extrusion feed chamber (22);
in the surface drying step, the temperature in the tunnel type oven (3) is controlled to be 60-100 ℃ for hot air drying, so that the residual moisture of the glass magnesium board subjected to thickness fixing treatment is removed, the surface is dried and shaped, and the time for the glass magnesium board to pass through the tunnel type oven (3) is controlled to be 5-30 minutes;
the finished product of the glass magnesium board is a board which has a plurality of composite materials and does not contain a single structural layer of a glass fiber cloth layer, and the surface hardness of the finished product of the glass magnesium board is controlled to be 80-85 HV.
8. The method for producing a magnesium oxide sheet according to claim 5, wherein:
in the step of dissolving, the volume of the solution pool is 100m3Injecting 32 tons of heptahydrate magnesium sulfate powder into the solution pool through a metering pump in the primary material dissolving step, wherein the stirring speed is 150-200 r/min, and the stirring time is 10-40 min, so as to obtain the S1 solution;
in the step of material preparation, 290Kg of S1 solution is put into a stirring barrel, and 13 to 18Kg of lignin fiber, 1 to 5Kg of magnesium sulfate modifier and 1 to 3Kg of polyacrylamide are put into the stirring barrel to be stirred at the stirring speed of 150 plus 200 rpm for 3 to 5 minutes, so as to obtain the S2 solution;
in the step of high-speed mixing, firstly placing 320-380Kg of magnesium oxide, 50-100Kg of wood powder, 80-150Kg of talcum powder and 3-8Kg of xanthan gum into a high-speed mixer for stirring at the stirring speed of 350-450 rpm for 2-3 minutes, and then pouring the S2 solution into the high-speed mixer for stirring for 3-5 minutes to obtain the gel;
the extrusion curing step is carried out after the kneading and banburying step and the vacuum dehumidification step are carried out in sequence,
an extrusion curing step, in the process of extruding and pushing the raw material for extrusion molding through an extrusion molding pushing screw (24), mixing, banburying and shearing the raw material for extrusion molding in an extruder barrel (23), mixing the raw material for extrusion molding in the extruder barrel (23) into a raw material cluster with high fluidity due to the fact that the viscosity of xanthan gum in the raw material for extrusion molding is rapidly reduced under the action of high shearing force, enabling the viscosity of the xanthan gum in the raw material cluster to rapidly increase and show pseudoplasticity due to disappearance of the shearing force after the raw material cluster enters an extrusion die head (21) and is extruded from the extrusion die head (21), and further carrying out extrusion molding to obtain the primarily cured and basically shaped magnesium oxide plate blank (5), wherein the temperatures of an extrusion feeding chamber (22), the extruder barrel (23) and the extrusion die head (21) are all set to be 20-30 ℃;
in the thickness fixing treatment step, the thickness of the glass magnesium board obtained after the thickness fixing treatment is equal to or close to that of a finished product glass magnesium board, and the mass density is 1.4 +/-0.1 g/mm 3;
cutting, namely cutting the glass magnesium board obtained after the thickness setting treatment by using cutting equipment to obtain the glass magnesium board with a set length specification;
in the surface drying step, hot air with the temperature controlled between 80 and 90 ℃ is used for drying in the tunnel type drying oven (3), the glass magnesium board subjected to natural curing treatment is subjected to surface drying treatment through the tunnel type drying oven (3), the time of the tunnel type drying oven (3) is controlled between 5 and 10 minutes, and water in the tunnel type drying oven (3) is pumped out through an air extractor;
in the maintenance treatment step, the surface-dried glass magnesium board is sucked and removed through a vacuum chuck, stacked to a tray and then sent to a maintenance room for maintenance, the temperature of the maintenance room is controlled to be 40-60 ℃, and the glass magnesium board is pushed out of the maintenance room after being maintained for 24 hours by the maintenance room;
a natural curing step, wherein the natural curing treatment is carried out for 5 to 7 days after the curing treatment step, so that the surface hardness is controlled to be 80 to 85 HV;
and the step of finishing the product to obtain the finished product of the glass magnesium board.
9. The production method of the multilayer composite glass magnesium plate is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
a finished magnesium oxide board production step of producing a finished magnesium oxide board according to the method for producing a magnesium oxide board of any one of claims 1 to 4;
and compounding, namely compounding at least one surface wear-resistant layer and a decorative layer above the finished glass magnesium board, and compounding at least one of a solid wood layer, a soft cushion layer, a mute layer, a waterproof layer and a balance paper layer above and/or below the finished glass magnesium board, wherein the surface wear-resistant layer is positioned on the top layer of the multilayer composite glass magnesium board, and the decorative layer is compounded below the surface wear-resistant layer to obtain the multilayer composite glass magnesium board.
10. The method for producing the multi-layer composite glass-magnesium plate as claimed in claim 9, wherein: in the compounding step, at least one of the solid wood layer, the soft cushion layer, the waterproof layer and the mute layer is compounded above the finished glass magnesium board, and at least one of the solid wood layer, the soft cushion layer, the waterproof layer, the mute layer and the balance paper layer is compounded below the finished glass magnesium board;
the finished glass magnesium board is used as a substrate layer of the multilayer composite glass magnesium board or one material layer except the substrate layer;
the decorative layer comprises a pattern paper layer, a solid wood sheet layer, a ceramic tile layer or a PVC color film layer;
the compounding comprises a hot-pressing compounding mode, a viscose compounding mode, a spraying compounding mode and an in-mold forming compounding mode which uses a mold for integral forming;
the surface wear-resistant layer is at least one of a melamine impregnated paper layer or a wear-resistant paper layer, an aluminum oxide wear-resistant layer, a UV paint wear-resistant layer and a PVC wear-resistant sheet which are compounded on the top surface of the multilayer composite glass-magnesium plate;
the produced multilayer composite glass magnesium plate comprises one of the following three structures according to the structural distinction,
1) the multilayer composite glass magnesium board comprises a surface wear-resistant layer arranged on the topmost layer, a decorative layer compounded below the surface wear-resistant layer and a finished glass magnesium board arranged at the bottommost layer, wherein at least one of a solid wood layer, a soft cushion layer, a silencing layer, a waterproof layer and a balance paper layer is compounded between the decorative layer and the finished glass magnesium board;
2) the multilayer composite glass magnesium board comprises a surface wear-resistant layer arranged on the topmost layer, a decorative layer compounded below the surface wear-resistant layer and a finished glass magnesium board compounded below the surface wear-resistant layer, wherein at least one of a solid wood layer, a soft cushion layer, a mute layer, a waterproof layer and a balance paper layer is compounded below the finished glass magnesium board;
3) the multilayer composite glass magnesium board comprises a surface wear-resistant layer arranged on the topmost layer, a decorative layer compounded below the surface wear-resistant layer and a finished glass magnesium board arranged in the middle, wherein at least one of a solid wood layer, a soft cushion layer, a mute layer, a waterproof layer and a balance paper layer is compounded above and below the finished glass magnesium board respectively;
the obtained multi-layer composite glass magnesium board is distinguished according to the use type and comprises a floor or a wallboard.
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