CN111376543A

CN111376543A - Multilayer composite board and manufacturing method thereof

Info

Publication number: CN111376543A
Application number: CN202010293443.XA
Authority: CN
Inventors: 高峰; 马灵飞; 刘在祥; 陈艳红; 朱涛; 蔡园丰; 王兵; 牛争艳
Original assignee: Shanghai Xingye Material Technology Co Ltd
Current assignee: Shanghai Xingye Material Technology Co Ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-07-07

Abstract

The application discloses a multilayer composite board and a manufacturing method thereof, wherein the multilayer composite board comprises an upper board, a lower board and a plurality of connecting beams between the upper board and the lower board; the upper plate is formed by a solidified first cement mixture and a first reinforcing grid cloth buried in the first cement mixture, the lower plate is formed by a solidified second cement mixture and a second reinforcing grid cloth buried in the second cement mixture, the connecting beam is formed by a solidified third cement mixture, the first cement mixture and the third cement mixture at the joint of the connecting beam and the upper plate are mutually fused and consolidated into a whole, and the second cement mixture and the third cement mixture at the joint of the connecting beam and the lower plate are mutually fused and consolidated into a whole. The multilayer composite board has high structure strength, is not easy to crack and deform, is simple to manufacture, can be very thin in thickness, can be processed and molded in a factory in advance and then transported to a field for installation, and can be widely applied to the field of buildings.

Description

Multilayer composite board and manufacturing method thereof

Technical Field

The application relates to a composite board, in particular to a multilayer composite board and a manufacturing method thereof.

Background

Along with the continuous development of the building industry, building materials are continuously updated and changed, the production mode of buildings is changed, the assembly type buildings advocated at present are rising, building modularization is a trend inevitably, but the structural panels of building modules do not have good building materials, the plates which can be reluctantly used at present are divided into organic plates and inorganic plates, wherein the organic plates comprise traditional wood fiber boards, shaving boards, European pine boards and wood fiber boards, the shaving boards and the European pine boards are inflammable, the fireproof performance is poor, the problem of formaldehyde release exists, the plate bodies expand after absorbing water and directly lose the service performance, the strength is low, the plate bodies are easy to crush, and the assembly type building modules are not suitable for assembly type building walls with prefabricated frame structures, particularly outer walls.

Compare in above-mentioned organic class panel, inorganic panel's waterproof and fireproof performance has certain advantage, common available inorganic panel includes cement fiberboard, glass magnesium flat board, the gypsum board, there is material density height in these several kinds of inorganic panels, it is heavier to become the board weight, there is the micropore in the overall structure, lack toughness, it is broken easily to take place when receiving impact stress and shear stress's influence, structural strength is low and the nail-holding power is poor, the panel of single texture is placed for a long time and is easily taken place buckling deformation, problems such as manufacturing cost is higher, and the magnesium oxychloride cement that adopts in the glass magnesium flat board has the corrosivity to the reinforcing material wherein, use the brittleness gradually to improve for a long time, structural strength reduces.

Chinese utility model patent No. ZL200720020883.8 discloses a fine and close compound light inside and outside wallboard, this wallboard include outer thick liquids layer, and the landfill has plastic-coated glass fiber net cloth in the thick liquids layer, and the inside cladding of thick liquids layer has the foam layer, has the through-hole in the foam layer, has filled the column thick liquids body in the through-hole. Although the wallboard has various excellent performances, the following defects exist:

1. the columnar slurry body poured and solidified in the through hole of the foam plastic layer mainly plays a role of connecting an external upper slurry layer and an external lower slurry layer, the columnar slurry body does not provide any help for the bending resistance of the whole wallboard, the bending resistance of the wallboard is completely provided by the glass fiber mesh cloth in the slurry layers, and therefore the wallboard is easy to collapse and deform when bearing large bending torque.

2. The biggest disadvantage of the wall panel is that the wall panel is formed by pouring in a mould, and the wall panel manufactured in the mode has low structural strength and production efficiency, large thickness and difficulty in thinning.

In view of the above problems, it is desirable to provide a multifunctional composite board with high structural strength, strong nail-holding power, good weather resistance, adaptability to industrial continuous production, and adaptability to modular structure in modular assembly type buildings.

Disclosure of Invention

The purpose of the application is: the multilayer composite board has high strength, is not easy to crack and deform, is simple to manufacture, can be very thin in thickness, can be processed and formed in a factory in advance and then transported to a field for installation, and can be widely applied to the field of buildings.

The technical scheme of the application is as follows:

a multi-layer composite panel, comprising:

an upper panel formed of a cured first cement mixture and a first reinforcing mesh embedded within the first cement mixture;

a lower plate disposed in parallel below the upper plate, formed of a second cement mixture and a second reinforcing mesh cloth buried in the second cement mixture; and

at least two connection beams arranged between the upper plate and the lower plate at intervals, each connection beam is linearly extended and arranged parallel to the upper plate and the lower plate, the connection beams are formed by solidified third cement mixture, the third cement mixture on the upper surface of the connection beams and the first cement mixture on the lower surface of the upper plate are mutually fused and fixed into a whole, and the third cement mixture on the lower surface of the connection beams and the second cement mixture on the upper surface of the lower plate are mutually fused and fixed into a whole.

On the basis of the technical scheme, the application also comprises the following preferable scheme:

the first reinforcing grid cloth is glass fiber cloth or a steel wire mesh, and the second reinforcing grid cloth is glass fiber cloth or a steel wire mesh.

The first reinforcing mesh cloth is disposed on an upper surface or a lower surface of the upper plate, and the second reinforcing mesh cloth is disposed on an upper surface or a lower surface of the lower plate.

The first reinforcing mesh cloth and the second reinforcing mesh cloth are both provided with at least two layers.

Wherein one layer of the first reinforcing mesh cloth is arranged on the upper surface of the upper plate, and the other layer of the first reinforcing mesh cloth is arranged on the lower surface of the upper plate; wherein one layer of the second reinforcing mesh cloth is arranged on the upper surface of the lower plate, and the other layer of the second reinforcing mesh cloth is arranged on the lower surface of the lower plate.

The first reinforcing mesh cloth is embedded in the first cement mixture with a preset tensile prestress, and the second reinforcing mesh cloth is embedded in the second cement mixture with a preset tensile prestress.

And filling materials are filled in gaps among the upper plate, the lower plate and the connecting beams.

The filler is a heat insulating material or a sound insulating material.

The filler is selected from one or a mixture of more than two of foamed plastic, bamboo sawdust, perlite and foamed concrete.

The distance between the upper plate and the lower plate is 1-10 mm.

Unsaturated resin is added into the third cement mixture.

And a thread tooth socket is fixedly arranged in at least one of the connecting beams.

And the upper surface of the multilayer composite plate is provided with a bolt passing hole which extends downwards and is coaxially communicated with the internal thread hole of the thread tooth socket.

The upper end face of the thread tooth socket is flush with or protrudes out of the upper surface of the multilayer composite board.

The outer wall surface of the thread tooth socket is provided with self-tapping threads, and the thread tooth socket is tapped into the connecting beam by means of the self-tapping threads.

The thread tooth socket is embedded in the connecting beam.

The coupling beam is the straight line roof beam of straight line extension to each the coupling beam equidistance is arranged.

And the upper surface or the lower surface of the multilayer composite board is provided with a mark for indicating the position of the connecting beam.

A water-proofing agent is added to the first cement mixture and the second cement mixture.

A retarder is added to the first cement mixture, the second cement mixture, and the third cement mixture.

The first cement mixture, the second cement mixture and the third cement mixture are cement mortars.

The first cement mixture comprises one or the combination of more than two of quick-hardening early-strength sulphoaluminate cement, ferro-aluminate cement, Portland cement, magnesium oxychloride cement, phosphorus-magnesium cement and high-alumina cement;

the second cement mixture comprises one or the combination of more than two of quick-hardening early-strength sulphoaluminate cement, ferro-aluminate cement, Portland cement, magnesium oxychloride cement, phosphorus-magnesium cement and high-alumina cement;

the third cement mixture comprises one or the combination of more than two of quick-hardening early-strength sulphoaluminate cement, ferro-aluminate cement, Portland cement, magnesium oxychloride cement, phosphorus-magnesium cement and high-alumina cement.

The preparation method of the multilayer composite board comprises the following steps:

s1: laying the second reinforcing scrim and the second cement mixture for forming the lower plate;

s2: before the second cement mixture is solidified, laying a third cement mixture for forming a connecting beam on the upper surface of the lower plate;

s3: before the third cement mixture is cured, the first reinforcing mesh cloth and the first cement mixture for forming the upper plate are laid on the upper surface of the connection beam.

Further comprising step S4: applying a Z-direction pressing force to the composite plate preform obtained in the step S3 to urge the upper plate and the lower plate to approach each other to press the connection beam.

In the step S4, an X-direction pressing force perpendicular to the connecting beam is also applied to the composite board preform obtained in the step S3.

In the step S4, a Y-direction pressing force parallel to the connection beam is also applied to the composite board preform obtained in the step S3.

After the step S2 is completed and before the step S3 is performed, the filler is laid between the connection beams.

In the step S1, stretching the first reinforcing mesh cloth to maintain the first reinforcing mesh cloth in a tensioned state, and then laying the first cement mixture outside the first reinforcing mesh cloth;

in the step S2, the second reinforcing mesh cloth is tensioned to maintain the second reinforcing mesh cloth in a tensioned state, and the second cement mixture is laid outside the second reinforcing mesh cloth.

In the step S2, a third cement mixture is extruded into a plate shape, and then the plate-shaped third cement mixture is laid on the upper surface of the lower plate and covers the entire upper surface of the lower plate, and then a portion of the third cement mixture is removed to form a plurality of parallel and spaced connecting beams.

In the step S2, the third cement mixture is extruded into the strip-shaped connection beam, and then the strip-shaped connection beam is laid on the upper surface of the lower plate.

In the step S1, pressing the second cement mixture having the second reinforcing mesh cloth embedded therein so that the second cement mixture has a plate shape;

in the step S3, the first cement mixture having the first reinforcing mesh cloth embedded therein is pressed so that the first cement mixture has a plate shape, and then the plate-shaped first cement mixture having the first reinforcing mesh cloth embedded therein is laid on the upper surface of the coupling beam.

The application has the advantages that:

1. the both sides of this kind of composite sheet of this application are inside to be buried and have strengthened net cloth cement mixture layer, the tie-beam that the centre formed for the cement mixture solidification, the inside tie-beam with both sides cement mixture layer with the help of the interfusion infiltration of cement mixture and fixed combination together, its structural integrity is good, difficult fracture deformation, 0.5-8cm can be accomplished to thickness, can realize this composite sheet lightweight simultaneously assurance it has sufficient structural strength in furthest, but wide application in the building field, the side fascia of specially adapted preparation steel construction building, or the indoor partition wall, the cabinet body board.

2. The gaps between the connecting beams are filled with light materials, so that the composite board is convenient to manufacture, and the heat insulation and sound insulation performance of the composite board can be improved.

3. The connecting beams can also be in a cavity structure without filling any material, so that the self weight and the material consumption of the composite board can be further reduced.

4. The upper plate and the lower plate are separated by the connecting beams at a certain distance, relatively loose filler (compared with the solidified cement mixture) can be selectively filled in gaps among the connecting beams, and the filler in the gaps or the gaps can absorb the deformation of the upper plate, the lower plate and even the connecting beams, so that the composite plate is prevented from generating large deformation or cracking.

5. The unsaturated resin is added into the cement mixture for manufacturing the connecting beam, so that the mechanical property and the nail-holding power of the connecting beam are obviously improved, the self-tapping screw or the thread tooth socket can be directly locked into the connecting beam of the composite plate in actual application so as to fasten and connect the structural plate and related components (without arranging a through hole on the structural plate), and the problem that the self-tapping screw or the thread tooth socket falls off due to the fact that the connecting beam is too brittle and collapses does not exist. The crushing resistance and the compressive strength of the connecting beam interface are greatly optimized, and the smoothness of the inner surface of the tapping part is high, so that the connecting beam is not easy to crack.

6. Because of this structural slab is inside can firmly the tapping, so it can be as partition wall and cabinet body panel in the house, can firmly install parts such as self tapping screw, hinge when using as partition wall or cabinet body board, compare in shaving board commonly used, medium density fiberboard and wooden multilayer plywood, this structural slab intensity is higher, and the weatherability is better, has good waterproof and fireproof performance and extremely strong nail-holding power, manufacturing cost is lower, and does not contain formaldehyde, can not pollute the indoor environment.

7. Even if the self-tapping screw or the thread tooth socket locked in the connecting beam is subjected to a large enough external pulling force to be taken away from the surrounding cement mixture and be pulled out together, the reinforcing grid cloth anchored in the cement mixture at the outer side can also prevent the screw or the thread tooth socket from being pulled out.

8. The surface of this composite sheet has set up the sign that corresponds the internal connection roof beam position, can find out the position of internal connection roof beam fast when practical application to with the accurate tie-beam of locking of self-tapping screw.

9. The cement mixture in the upper and lower board can be added with a waterproof agent, so that the waterproof performance of the composite board is improved, a waterproof layer is not required to be coated on the surface of the composite board, and compared with the traditional waterproof layer coating mode, the fine gaps and holes on the surface of the composite board can be effectively reduced, and the waterproof efficiency is better.

10. The reinforcing mesh cloth is arranged in the cement mixture of the upper plate or the lower plate with preset tensile prestress, so that the tensile strength and the bending strength of the composite plate are greatly improved.

11. The retarder is filled in the first cement mixture, the second cement mixture and the third cement mixture, the solidification speed of the cement mixtures is slowed down, and therefore the situation that the connecting beam cannot be stably connected with the upper plate or the lower plate due to the fact that the cement mixtures in the upper plate, the lower plate or the connecting beam are solidified quickly in the manufacturing process of the composite plate is avoided, and the added retarder can prevent the cement mixtures from generating transient setting reactions to cause overlarge brittleness of a finished product.

12. This application adopts the composite sheet of special technology preparation, and whole board thickness can be as little as 0.5cm, can guarantee that it has sufficient structural strength when realizing this composite sheet lightweight to the furthest, but wide application in the building field, the specially adapted makes the side fascia of steel construction building.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic perspective cross-sectional view of a multilayer composite board according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a multi-layer composite panel according to an embodiment of the present disclosure;

FIG. 3 is an enlarged view of the portion X of FIG. 2;

fig. 4 is a diagram illustrating a practical application of a multi-layer composite board according to an embodiment of the present disclosure;

fig. 5 is a schematic perspective cross-sectional view of a multilayer composite board according to a second embodiment of the present application;

fig. 6 is a schematic cross-sectional view of a multi-layer composite plate according to a second embodiment of the present application;

fig. 7 is a schematic cross-sectional view of a multilayer composite board according to a third embodiment of the present application;

FIG. 8 is a schematic structural diagram of a multilayer composite panel according to an embodiment of the present application;

FIG. 9 is a schematic perspective view of a thread socket according to a fourth embodiment of the present application;

fig. 10 is a schematic perspective view of a thread sleeve at another viewing angle according to a fourth embodiment of the present disclosure;

FIG. 11 is a cross-sectional view of a thread socket according to a fourth embodiment of the present application;

wherein: 1-upper plate, 2-lower plate, 3-connecting beam, 4-filler, 5-thread tooth socket, 6-screw, 7-self-tapping screw, 8-mark, 1 a-first reinforced grid cloth, 1 b-first cement mixture, 2 a-second reinforced grid cloth, 2 b-second cement mixture and 5 a-self-tapping screw.

Detailed Description

In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and detailed description. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present application. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

In the description of the present specification, the terms "connected", "mounted", "fixed", and the like are to be understood in a broad sense. For example, "connected" may be fixedly connected, detachably connected, or integrally connected; may be connected directly or indirectly through intervening media. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present specification, the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred devices or units must have a specific direction, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present application.

The first embodiment is as follows:

fig. 1 to 3 show a preferred embodiment of the multilayer composite panel of the present application, which is mainly composed of an upper panel 1, a lower panel 2 and a plurality of connecting beams 3. Wherein the upper plate 1 and the lower plate 2 are arranged in parallel spaced apart from each other one above the other, the connection beams 3 are fixedly connected between the upper plate 1 and the lower plate 2, and the respective connection beams 3 are arranged spaced apart from each other in the horizontal direction.

The aforementioned upper and

lower panels

1 and 2 have the same structure, wherein the upper panel 1 is formed of a cured first cement mixture 1b and a first reinforcing mesh cloth 1a embedded in the first cement mixture 1 b. The lower plate 2 is formed of a cured second cement mixture 2b and a second reinforcing mesh 2a embedded in the second cement mixture. A plurality of connecting beams 3 are arranged between the upper and lower plates at intervals for rigidly connecting the upper and lower plates together. Specifically, the method comprises the following steps: the coupling beams 3 are formed of a solidified third cement mixture, and each coupling beam 3 is linearly extended in parallel to the upper and lower plates, and the third cement mixture at the upper surface position of the coupling beam 3 and the first cement mixture 1b at the lower surface position of the upper plate 1 are fused (interpenetrated) and consolidated into one; the third cement mixture at the lower surface position of the coupling beam 3 and the second cement mixture at the upper surface position of the lower plate 2 are fused and integrated with each other. That is, the first cement mixture 1b in the upper plate 1 and the third cement mixture in the connecting beam 3 are fused and fixed into a whole at the connecting interface part of the two, so that the fixed connection of the connecting beam 3 and the upper plate 1 is realized; the second cement mixture 2b in the lower plate 2 and the third cement mixture in the connecting beam 3 are mutually fused and fixed into a whole at the connecting interface part of the two, thereby realizing the fixed connection of the connecting beam 3 and the upper plate 2.

The present embodiment may further fill the gap between the upper plate 1, the lower plate 2 and each connecting beam 3 with a filler 4 having thermal insulation and/or sound insulation based on certain requirements for thermal insulation and sound insulation of the composite plate used in certain use environments.

The filler 4 is preferably made of a lightweight material such as foamed plastic, bamboo chips, perlite, foamed concrete, etc., but it may be made of a mixture of any two or more of the above four materials.

Referring to fig. 1 to 4 again, the method for manufacturing the composite board of the present embodiment is described as follows, which mainly includes the following four steps:

s1: a second reinforcing mesh cloth 2a and a second cement mixture 2b for forming the lower plate 2 are laid.

In order to prevent the second cement mixture 2b from being scattered and loosened during the manufacturing process, in this step S1, the second cement mixture 2b having the second reinforcing mesh 2a embedded therein may be extruded by means of an extrusion molding apparatus so that the second cement mixture 2b (having the second reinforcing mesh 2a embedded therein) is preliminarily shaped into a plate.

S2: before the second cement mixture 2b is cured, a third cement mixture for forming the connection beams 3 is spread on the upper surface of the lower plate 2, and then the gaps between the connection beams 3 are filled with fillers 4.

The step S2 includes two specific steps:

first, a third cement mixture is extruded into a plate shape by an extrusion molding apparatus, then the plate-shaped third cement mixture is laid on the upper surface of the lower plate 2 and the upper surface of the lower plate 2 is entirely covered, and then a part of the third cement mixture is removed (which can be scraped off by a scraper) to form a plurality of connecting beams 3 arranged in parallel at intervals.

And the second method comprises the following steps: the third cement mixture is directly extruded into the strip-shaped connection beam 3 by means of an extrusion molding apparatus, and then the strip-shaped connection beam 3 is laid on the upper surface of the lower plate 2.

S3: before the third cement mixture is cured, the first reinforcing mesh cloth 1a and the first cement mixture 1b for forming the upper panel 1 are laid on the upper surface of the coupling beam 3. Since the first cement mixture 1a, the second cement mixture 2a, and the third cement mixture are not completely cured and the connection beam 3 is disposed between the upper plate and the lower plate in contact therewith, the first cement mixture 1a and the third cement mixture at the contact portion of the upper plate 1 and the connection beam 3 are fused with each other and cured into one body after a certain period of time, and the second cement mixture 1a and the third cement mixture at the contact portion of the lower plate 2 and the connection beam 3 are fused with each other and cured into one body after a certain period of time.

In order to prevent the first cement mixture 1b from being scattered and loosened during the manufacturing process, in the step S3, the first cement mixture 1b having the first reinforcing mesh cloth 1a embedded therein may be extruded by means of an extrusion molding apparatus to make the first cement mixture 1b (having the first reinforcing mesh cloth 1a embedded therein) preliminarily take a plate shape. Then, the plate-like first reinforcing mesh cloth 1a in which the first reinforcing mesh cloth 1a is embedded is laid on the upper surface of the connecting beam 3.

As can be seen from the above, after the step S3 is completed, a composite board initial product is obtained, in which the upper board, the lower board and the connecting beam are consolidated together and the gap is filled with filler, and the composite board initial product has a certain quality and can be completely sold and used as a finished product. However, in order to further improve the quality of the composite board, so that the bonding strength of the upper board, the lower board, the connecting beam and the filler is higher, and the strength of the upper board, the lower board and the connecting beam is enhanced, the following step S4 is further performed in this embodiment.

S4: applying a Z-directional pressing force (i.e., a vertical pressing force) that urges the upper plate 1 and the lower plate 2 to approach each other to press the intermediate connection beam 3 to the composite plate preform obtained in step S3; at the same time, the primary composite plate obtained in step S3 is also subjected to an X-direction pressing force perpendicular to the connection beams and a Y-direction pressing force parallel to the connection beams.

It is understood that the aforementioned Z-direction extrusion force can increase the contact force of the upper plate 1, the connecting beam 3 and the lower plate 3, thereby increasing the mutual melting degree of the cement mixture at the contact portion, and further enhancing the connection strength of the upper plate 1, the connecting beam 3 and the lower plate 2. The X-direction extrusion force and the Y-direction extrusion force can prevent the primary composite board from collapsing outwards under the Z-direction pressure, and are matched with the Z-direction extrusion force, the primary composite board in the middle is wholly wrapped by the force in the three X, Y and Z directions, and the primary composite board is wholly extruded, so that the bonding strength of the upper plate, the lower plate, the connecting beam and the filler is further improved, and the self strength of the upper plate, the lower plate and the connecting beam is also enhanced respectively.

In step S2, the filler 4 may not be filled in the space between the connection beams 3; the finished composite board has a gap structure without filler between the connecting beams 3, so that the dead weight and the materials of the composite board can be further reduced.

The distance between the upper plate and the lower plate of the composite plate manufactured by the process can be as small as 1mm, and is generally 1-10 mm. The overall thickness of the composite plate can be as small as 0.5cm, typically 0.5-8 cm. The composite board can be lightened to the maximum extent, and meanwhile, the composite board has enough structural strength, can be widely applied to the field of buildings, and is particularly suitable for manufacturing external wall boards of steel structure buildings.

In this embodiment, an unsaturated resin is added to the third cement mixture for forming the connecting beam 3. The unsaturated resin is a viscous liquid obtained by dissolving a linear polymer compound containing unsaturated dibasic acid or dihydric alcohol, which is obtained by condensation polymerization of dibasic acid and dihydric alcohol, in a monomer (usually styrene). The addition of unsaturated resins to the third cement mixture may reduce brittleness, increase toughness, and increase flexibility. By adding unsaturated resin, the mechanical property of the connecting beam 3 is obviously improved, and the problems of difficult nailing and poor nail holding force of the composite board are solved.

As shown in fig. 4, in practical application, the self-tapping screw 7 can be directly locked into the high-strength connecting beam 3 along the thickness direction of the composite board, so that the composite board can be locked and fixed on the surface of the relevant component (such as a steel frame, a roof, etc.) by the self-tapping screw 7, or the relevant article (such as a hook, a television, etc.) can be locked and fixed on the composite board by the self-tapping screw 7. Because the tie-beam 3 is formed by adding the cement mixture solidification back of unsaturated polyester resin, its mechanical properties is excellent, and the power of holding a nail is strong, and after tapping screw 7 attacked tie-beam 3, the screw thread intensity that forms in tie-beam 3 was extremely high difficult for collapsing, and then has guaranteed the locking force of tapping screw 7 with tie-beam 3, and tapping screw 7 is difficult for following tie-beam 3 and deviate from.

In order to find out the position of the internal connection beam 3 quickly in practical application so as to accurately lock the self-tapping screw 7 into the connection beam 3, the embodiment is provided with a mark 8 which is located right above the connection beam 3 and indicates the position of the connection beam on the upper surface of the composite board. Of course, a mark can be arranged on the lower surface of the composite board and positioned right below the connecting beam 3, and the position of the connecting beam can be indicated.

The first cement mixture 1b for manufacturing the upper plate 1 and the second cement mixture 2b for manufacturing the lower plate 2 may also be the same components as the third cement mixture, i.e. unsaturated resin may also be added to the first cement mixture 1b and the second cement mixture 2b, so that the mechanical properties of the upper plate 1 and the lower plate 2 are also improved. However, in view of the high cost of adding unsaturated resin and the sufficient use requirement of locking the self-tapping screw 7 by the tie beam 3 alone, the unsaturated resin is not added to the first cement mixture 1b and the second cement mixture 2b, and the first cement mixture 1b and the second cement mixture 2b are both made of common cement mixture components.

Further, the first cement mixture 1b and the second cement mixture 2b adopt the same components, and separate ingredients are not needed to be separately prepared for the upper plate 1 and the lower plate 2, so that the manufacturing process and the cost of the composite plate are simplified.

Further, the third cement mixture for forming the bridge 3 may be a common cement mixture component, and in this case, the bridge 3 is relatively brittle and thus it is not suitable to lock the self-tapping screw 7 into the bridge 3.

Each tie-beam 3 in this composite sheet is the straight line muscle that the straight line extends to each tie-beam 3 is parallel to each other and the equidistance arranges.

In order to put the first reinforcing mesh cloth 1a solidified in the upper plate 1 and the second reinforcing mesh cloth 2a solidified in the lower plate 2 in a tensioned state, the upper plate 1 and the lower plate 2 have strong tensile strength and bending strength. When manufacturing the composite board, preferably, the first reinforcing mesh cloth 1a is tensioned to keep the first reinforcing mesh cloth 1a in a tensioned and stretched state, and then the first cement mixture 1b is laid outside the first reinforcing mesh cloth 1 a; similarly, the second reinforcing mesh cloth 2a is tensioned to maintain the second reinforcing mesh cloth 2a in a tensioned and stretched state, and then the second cement mixture 2b is laid out of the second reinforcing mesh cloth 2 a.

In order to improve the waterproof performance of the composite board, the first cement mixture 1b and the second cement mixture 2b can also adopt a waterproof cement mixture added with a waterproof agent, so that a waterproof layer does not need to be coated on the surface of the composite board, the fine gaps and holes on the surface of the composite board are further effectively reduced, and the waterproof performance is better.

In addition, in order to avoid that the connecting beam and the upper plate or the lower plate cannot be stably connected due to the fact that the cement mixture in the upper plate, the lower plate or the connecting beam is solidified too fast in the process of manufacturing the composite plate, a retarder can be filled in the first cement mixture 1b, the second cement mixture 2b and the third cement mixture to slow down the solidification speed of the cement mixtures, and the retarder can prevent the cement mixtures from generating transient setting reactions to cause overlarge brittleness of finished products.

By "cement admixture" is meant a mixture of cement and other substances, such as a mixture of cement and wood chips, a mixture of cement and yellow sand, and the like. Specifically, in this embodiment, the first cement mixture 1b, the second cement mixture 2b, and the third cement mixture are cement mortars obtained by mixing cement and yellow sand (containing water).

The first cement mixture 1b, the second cement mixture 2b, and the third cement mixture may include any one or a combination of two or more of rapid hardening early strength sulphoaluminate cement, ferro-aluminate cement, portland cement, magnesium oxychloride cement, phosphorus magnesium cement, and high alumina cement.

Example two:

fig. 5 and 6 show a second preferred embodiment of the multilayer composite panel of the present application, the composite panel of this embodiment having substantially the same structure as the composite panel of the previous embodiment, with the only difference that: the gap between the upper plate 1 and the lower plate 2 (and also the gap between the connecting beams 3) is not filled with the filler 4, so that the weight and material consumption of the composite panel can be further reduced.

Example three:

fig. 7 shows a third preferred embodiment of the multilayer composite panel of the present application, the composite panel of this embodiment having substantially the same structure as the second composite panel of the above embodiment, with the only difference that: two layers of first reinforcing gridding cloth 1a are embedded in the upper plate 1, and the two layers of first reinforcing gridding cloth 1a are arranged at intervals up and down; two layers of second reinforcing mesh cloths 2a are buried in the lower plate 1, and the two layers of second reinforcing mesh cloths 2a are spaced apart from each other up and down.

The two layers of the reinforcing mesh cloth in the upper plate and the lower plate are arranged at intervals up and down, so that the tensile strength and the bending strength of the upper plate, the lower plate and the whole composite plate can be further improved.

Also, the first reinforcing mesh 1a may be disposed very close to the upper or lower surface of the upper plate 1, and may even be disposed on the upper or lower surface of the upper plate 1 (at this time, most or all of the first reinforcing mesh is still fixedly buried inside the upper plate 1). Correspondingly, the second reinforcing mesh 2a may be disposed very close to the upper or lower surface of the lower plate 2, and may even be disposed on the upper or lower surface of the lower plate 2 (at which time most or all of the second reinforcing mesh is still fixedly buried inside the lower plate 2).

Example four:

fig. 8 to 11 show a fourth preferred embodiment of the multilayer composite panel of the present application, the composite panel of this embodiment having substantially the same structure as the one of the above embodiment, with the only difference that: the thread tooth socket 5 is fixedly arranged in the connecting beam 3, and the axial dimension of the thread tooth socket 5 is large, so that the upper end surface of the thread tooth socket 5 extends out of the upper surface of the composite plate and is flush with the upper end surface of the composite plate.

In practical application, the screw 6 engaged with the thread socket 5 is directly locked, so that the composite board is fastened to the outer surface of the steel structure by the screw 6 to be used as an external wall panel of the steel structure wall, or various components such as a television, a hook and the like are fastened to the side of the composite board by the screw 6.

Of course, the aforementioned thread sockets 5 can be completely embedded inside the connecting beam 3, and at this time, a bolt passing hole extending downward and coaxially communicating with the internal thread hole of the thread socket 5 needs to be made on the upper surface of the composite plate to facilitate the locking of the screw 6. And the upper end surface of the thread sleeve 5 can also protrude out of the upper surface of the composite plate, so that the locking of the screw 6 is also facilitated, but the surface flatness of the composite plate is affected.

In the present embodiment, the above-described thread socket 5 is embedded in the connection beam 3 in such a manner that: the outer wall surface of the thread insert 5 is provided with self-tapping threads 5a (i.e., external threads having a self-tapping function), and the thread insert 5 is screwed into the attachment beam 3 by means of the self-tapping threads 5 a. Of course, the thread sockets 5 can also be pre-embedded in the connecting beam that has not yet been cured.

It should be noted that, in the above two embodiments, the first reinforcing mesh cloth in the upper plate 1 and the second reinforcing mesh cloth in the lower plate 2 may be provided in multiple layers. And the first reinforcing mesh cloth 1a may be disposed at either the middle position of the thickness of the upper plate 1 or the upper or lower surface position of the upper plate 1 (in this case, the first reinforcing mesh cloth is also buried in the first cement mixture and is not separated from the first cement mixture). Also, the second reinforcing mesh may be disposed at a position intermediate to the thickness of the lower plate, or at a position of an upper surface or a lower surface of the lower plate.

It should be understood that the above-mentioned embodiments are only illustrative of the technical concepts and features of the present application, and the present application is not limited thereto. All equivalent changes and modifications made according to the spirit of the main technical scheme of the application are covered in the protection scope of the application.

Claims

1. A multi-layer composite panel, comprising:

an upper plate (1) formed of a cured first cement mixture (1b) and a first reinforcing scrim (1a) embedded within the first cement mixture;

a lower plate (2) arranged in parallel below said upper plate, formed by a second cement mixture (2b) which is cured and a second reinforcing mesh (2a) embedded within said second cement mixture; and

at least two connecting beams (3) arranged between the upper plate and the lower plate at intervals, wherein each connecting beam (3) is parallel to the upper plate and the lower plate and linearly extends, the connecting beams (3) are formed by solidified third cement mixtures, the third cement mixtures on the upper surface of the connecting beams (3) and the first cement mixtures on the lower surface of the upper plate are mutually fused and solidified into a whole, and the third cement mixtures on the lower surface of the connecting beams (3) and the second cement mixtures on the upper surface of the lower plate (2) are mutually fused and solidified into a whole.

2. The multilayer composite panel according to claim 1, wherein the first reinforcing scrim (1a) is a fiberglass cloth or a steel wire mesh, and the second reinforcing scrim (2a) is a fiberglass cloth or a steel wire mesh.

3. The multilayer composite panel according to claim 1, wherein the first reinforcing mesh cloth (1a) is disposed on the upper surface or the lower surface of the upper panel (1), and the second reinforcing mesh cloth (2a) is disposed on the upper surface or the lower surface of the lower panel (2).

4. The multilayer composite panel according to claim 1, characterized in that the first reinforcing scrim (1a) and the second reinforcing scrim (2a) are each provided with at least two layers.

5. The multilayer composite panel according to claim 4, wherein one layer of the first reinforcing scrim (1a) is arranged on the upper surface of the upper panel (1) and the other layer of the first reinforcing scrim (1a) is arranged on the lower surface of the upper panel (1); wherein one layer of the second reinforcing mesh cloth (2a) is arranged on the upper surface of the lower plate (2), and the other layer of the second reinforcing mesh cloth (2a) is arranged on the lower surface of the lower plate (2).

6. The multilayer composite panel according to claim 1, characterized in that the first reinforcing scrim (1a) is embedded in the first cement mixture (1b) with a predetermined tensile prestress and the second reinforcing scrim (2a) is embedded in the second cement mixture (2b) with a predetermined tensile prestress.

7. The multilayer composite panel according to claim 1, characterized in that the upper panel (1), the lower panel (2) and the space between the respective connecting beams (3) are filled with a filler (4).

8. The multilayer composite panel according to claim 7, characterized in that the filler (4) is a thermal or acoustic insulation material.

9. The multilayer composite panel according to claim 7, wherein the filler is selected from one or a mixture of two or more of foamed plastic, bamboo chips, perlite and foamed concrete.

10. The multilayer composite panel according to claim 1, characterized in that the distance between the upper panel (1) and the lower panel (2) is 1-10 mm.

11. The multilayer composite panel according to claim 1, wherein an unsaturated resin is added to the third cement mixture.

12. Multilayer composite plate according to claim 1 or 11, characterized in that a threaded socket (5) is fixedly arranged in at least one of said tie-beams (3).

13. The multilayer composite plate according to claim 12, wherein the upper surface of the multilayer composite plate is formed with a through-bolt hole extending downward and coaxially communicating with the internally threaded hole of the thread socket (5).

14. The multilayer composite board according to claim 12, characterized in that the upper end face of the thread socket (5) is flush with or protrudes from the upper surface of the multilayer composite board.

15. Multilayer composite panel according to claim 12, characterized in that the outer wall surface of the thread socket (5) is provided with a self-tapping thread (5a), the thread socket (5) being tapped into the tie-beam (3) by means of the self-tapping thread (5 a).

16. Multilayer composite panel according to claim 12, characterized in that said threading sockets (5) are pre-embedded in said tie-beams (3).

17. Multilayer composite plate according to claim 1, characterized in that the connecting beams (3) are rectilinear beams extending rectilinearly and that the connecting beams (3) are arranged equidistantly.

18. The multilayer composite panel according to claim 1, characterized in that the upper or lower surface of the multilayer composite panel is provided with a marking (8) indicating the position of the connecting beam (3).

19. The multilayer composite panel according to claim 1, characterized in that a water repellent agent is added to the first cement mixture (1b) and the second cement mixture (2 b).

20. The multilayer composite panel according to claim 1, characterized in that a retarder is added to the first cement mixture (1b), the second cement mixture (2b) and the third cement mixture.

21. The multilayer composite panel according to claim 1, characterized in that the first cement mixture (1b), the second cement mixture (2b) and the third cement mixture are cement mortars.

22. The multilayer composite panel according to claim 1,

the first cement mixture (1b) comprises one or the combination of more than two of quick-hardening early-strength sulphoaluminate cement, ferro-aluminate cement, portland cement, magnesium oxychloride cement, phosphorus-magnesium cement and high-alumina cement;

the second cement mixture (2b) comprises one or the combination of more than two of quick-hardening early-strength sulphoaluminate cement, ferro-aluminate cement, portland cement, magnesium oxychloride cement, phosphorus-magnesium cement and high-alumina cement;

the third cement mixture (2b) comprises one or the combination of more than two of quick-hardening early-strength sulphoaluminate cement, ferro-aluminate cement, portland cement, magnesium oxychloride cement, phosphorus-magnesium cement and high-alumina cement.

23. A method of manufacturing a multi-layer composite panel according to any one of claims 1 to 22, comprising the steps of:

s1: -laying said second reinforcing scrim (2a) and said second cement mixture (2b) for forming said lower plate (2);

s2: before the second cement mixture (2b) is solidified, laying a third cement mixture for forming a connecting beam (3) on the upper surface of the lower plate (2);

s3: before the third cement mixture is cured, the first reinforcing mesh (1a) and the first cement mixture (1b) for forming the upper panel (1) are laid on the upper surface of the connection beam (3).

24. The method according to claim 23, further comprising step S4: and applying a Z-direction extrusion force to the composite board initial product obtained in the step S3, wherein the Z-direction extrusion force is used for urging the upper board (1) and the lower board (2) to approach each other and extruding the connecting beam (3).

25. The method as claimed in claim 24, wherein in step S4, an X-direction pressing force perpendicular to the length direction of the connection beam is further applied to the composite plate preform obtained in step S3.

26. The method as claimed in claim 25, wherein in step S4, a Y-direction pressing force parallel to the length direction of the connection beam is further applied to the composite board preform obtained in step S3.

27. The method as claimed in claim 23, 24, 25 or 26, wherein the gap between the connecting beams (3) is filled with the filler (4) after the step S2 is completed and before the step S3 is performed.

28. The method of claim 23,

in the step S1, the first reinforcing mesh fabric (1a) is tensioned to maintain the first reinforcing mesh fabric (1a) in a tensioned state, and the first cement mixture (1b) is laid outside the first reinforcing mesh fabric (1 a);

in the step S3, the second reinforcing mesh cloth (2a) is tensioned to maintain the second reinforcing mesh cloth (2a) in a tensioned state, and the second cement mixture (2b) is laid outside the second reinforcing mesh cloth (2 a).

29. The method of claim 23,

in the step S2, a third cement mixture is extruded into a plate shape, the plate-shaped third cement mixture is laid on the upper surface of the lower plate (2) to cover the upper surface of the lower plate (2), and a part of the third cement mixture is removed to form a plurality of parallel connecting beams (3) arranged at intervals.

30. The method of claim 23,

in the step S2, the third cement mixture is extruded into the strip-shaped connection beam (3), and then the strip-shaped connection beam (3) is laid on the upper surface of the lower plate (2).

31. The method of claim 23,

in the step S1, pressing the second cement mixture (2b) having the second reinforcing mesh (2a) embedded therein such that the second cement mixture (2b) has a plate shape;

in the step S3, the first cement mixture (1b) having the first reinforcing mesh (1a) embedded therein is extruded such that the first cement mixture (1b) has a plate shape, and then the plate-shaped first cement mixture (1b) having the first reinforcing mesh (1a) embedded therein is laid on the upper surface of the coupling beam (3).