CN117432069A - Novel composite regenerated keel - Google Patents
Novel composite regenerated keel Download PDFInfo
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- CN117432069A CN117432069A CN202311431360.2A CN202311431360A CN117432069A CN 117432069 A CN117432069 A CN 117432069A CN 202311431360 A CN202311431360 A CN 202311431360A CN 117432069 A CN117432069 A CN 117432069A
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- 239000002131 composite material Substances 0.000 title claims abstract description 98
- 239000002023 wood Substances 0.000 claims abstract description 160
- 239000004743 Polypropylene Substances 0.000 claims abstract description 48
- -1 polypropylene Polymers 0.000 claims abstract description 48
- 229920001155 polypropylene Polymers 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000009757 thermoplastic moulding Methods 0.000 claims abstract description 6
- 229920000642 polymer Polymers 0.000 claims description 70
- 229920000728 polyester Polymers 0.000 claims description 24
- 238000004049 embossing Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 239000000805 composite resin Substances 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 8
- 239000011440 grout Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000001172 regenerating effect Effects 0.000 claims description 7
- 238000007731 hot pressing Methods 0.000 claims description 6
- 239000012634 fragment Substances 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims 4
- 238000004873 anchoring Methods 0.000 claims 3
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000008929 regeneration Effects 0.000 claims 1
- 238000011069 regeneration method Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 12
- 239000002699 waste material Substances 0.000 abstract description 9
- 230000007306 turnover Effects 0.000 abstract description 6
- 238000010008 shearing Methods 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000011347 resin Substances 0.000 abstract description 3
- 229920005989 resin Polymers 0.000 abstract description 3
- 238000004804 winding Methods 0.000 description 12
- 238000001816 cooling Methods 0.000 description 11
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 229920001169 thermoplastic Polymers 0.000 description 5
- 239000004416 thermosoftening plastic Substances 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 239000007767 bonding agent Substances 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229920013716 polyethylene resin Polymers 0.000 description 3
- 238000010104 thermoplastic forming Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000006664 bond formation reaction Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000013001 point bending Methods 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
Abstract
The invention relates to the technical field of building battens, and provides a novel composite regenerated keel, which comprises the following components: the wood core structure (1) is formed by stacking a plurality of layers of wood cores (2); the first fixing structure (3) is arranged between the wood cores (2) of each layer and fixedly connects the wood cores (2) of each layer; the second fixing structure (4) is wound and bound on the periphery of the wood core structure (1) to fix the wood core structure (1); and the third fixing structure (5) is arranged on the periphery of the second fixing structure (4) and the wood core structure (1) and is formed by thermoplastic molding with the wood core structure (1). According to the scheme of the invention, the brittle bending fracture of the keel wood core can be prevented, the structural ductility is increased, and the shearing and bending strength of the keel structure is improved; meanwhile, the contact between wood and polypropylene resin materials and air can be reduced, the durability of a keel structure is improved, the turnover rate of the materials is improved, the recycling of waste materials is realized, and the environment is protected.
Description
Technical Field
The invention relates to the technical field of building battens, in particular to a novel composite regenerated keel.
Background
Along with the continuous promotion of urban construction in China, engineering safety, quality and progress are required to be considered in the engineering construction process, and engineering economy is also required to be considered. Directly related to engineering economy is turnover control in project implementation, and a keel system is an important link in turnover control. The traditional keel system adopts a wood block, and is widely used for supporting various concrete templates due to strong corrosion resistance and certain bending resistance. However, the traditional building timber has brittle fracture and has a certain risk in practical application; in addition, in the actual engineering construction process, the wood is easy to fold, the turnover frequency is low, a large amount of wood Fang Longgu has the problem of short service life, and finally the wood is mostly building waste. The waste of the square joists leads to the waste of wood resources and also to the increase of engineering economic cost. Therefore, the industry common diseases that the waste wood keels are not sustainable in the existing building industry system still exist, and how to perform sustainable utilization of the waste wood keels is still the research focus. Meanwhile, the realization of the 'double carbon' target also puts more strict requirements on concrete building construction, and wood saving and substitution work are imperative in the field of building construction.
Disclosure of Invention
The invention aims to solve at least one technical problem in the background technology and provides a novel composite regenerated keel.
In order to achieve the above object, the present invention provides a novel composite regenerative keel comprising:
the wood core structure is formed by stacking a plurality of layers of wood cores;
the first fixing structure is arranged between the wood cores of all the layers and fixedly connects the wood cores of all the layers;
the second fixing structure is wound and bound on the periphery of the wood core structure and is used for fixing the wood core structure;
and the third fixing structure is arranged at the periphery of the second fixing structure and the wood core structure and is formed with the wood core structure in a thermoplastic mode.
According to one aspect of the invention, the first fixation structure is made of polypropylene.
According to one aspect of the invention, the second fixing structure is high-strength polyester yarns which are uniformly wound and bound on the periphery of the wood core structure at intervals of 3cm at an angle of 60 degrees along the length direction of the wood core structure;
the high-strength polyester yarn is resistant to high temperature of 300 ℃, and the outer side of the high-strength polyester yarn is subjected to hot pressing of the polypropylene resin composite material through a hot press when the heating temperature is 80 ℃.
According to one aspect of the invention, the third fastening structure comprises at least two polymeric composite layers laminated and wrapped around the periphery of the second fastening structure and the wood core structure.
According to one aspect of the present invention, the third fixing structure includes: a first polymer composite layer and a second polymer composite layer;
the first polymer composite layer is wrapped on the periphery of the wood core structure and the second fixing structure;
the second polymer composite layer is wrapped on the periphery of the first polymer composite layer.
According to an aspect of the present invention, the third fixing structure further includes: a first connection layer and a second connection layer;
the first connecting layer is arranged between the first polymer composite layer and the wood core structure and the second fixing structure, and is used for connecting the first polymer composite layer with the wood core structure and the second fixing structure;
the second connecting layer is arranged between the first polymer composite layer and the second polymer composite layer and is used for connecting the first polymer composite layer and the second polymer composite layer;
the first and second tie layers are made of polypropylene.
According to one aspect of the invention, the first polymer composite layer and the second polymer composite layer are formed by presoaking high-strength fibers and polypropylene, the tensile strength of the polymer composite layer is more than 800MPa, the fiber content is more than 70%, and the thickness is 0.2mm.
According to one aspect of the invention, the polypropylene has a tensile strength of > 20MPa, an elongation at break of > 30%, a flexural strength of > 30MPa and a notched impact of > 150J.
According to one aspect of the present invention, further comprising: and the rough surface is arranged on the outer wall of the third fixing structure.
According to one aspect of the invention, the roughened surface is formed by a temperature-reducing embossing process.
According to one aspect of the invention, the layers of wood cores are provided with tapered grout holes, and the tapered grout holes are concentrically arranged and edge aligned.
According to one aspect of the present invention, each of the tapered grouting holes has a diamond-like cross-sectional shape, the smaller hole of each of the tapered grouting holes has a 6mm diameter, the larger hole has a 8mm diameter, and each of the tapered grouting holes has a height of 70mm;
and arranging corresponding conical grouting holes on each layer of wood core every 200mm along the length direction of the wood core.
According to one aspect of the invention, a novel composite regenerative keel comprises: the wood core structure is formed by stacking a plurality of layers of wood cores; the first fixing structure is arranged between the wood cores of all layers and fixedly connects the wood cores of all layers; the second fixing structure is wound and bound on the periphery of the wood core structure and is used for fixing the wood core structure; and the third fixing structure is arranged at the periphery of the second fixing structure and the wood core structure and is formed by thermoplastic molding with the wood core structure. By the arrangement, all layers of wood cores can be connected together through the first fixing structure, a connecting foundation of up-down lamination of all layers of wood cores is formed, and the connecting strength of the foundation is guaranteed. Then, the second fixing structure is used for winding and binding from the periphery (namely the outer wall in the length direction) of the wood core structure, so that the wood core structure is further fixed from the outer side on the basis of the first fixing structure to form a whole body with higher strength. Further, the periphery of second fixed knot structure and wooden core structure (namely the outer wall of the length direction of wooden core structure and the outer wall of the second fixed knot structure of ligature on the outer wall of wooden core structure) is wrapped up through third fixed knot structure, through thermoplastic forming's mode, form the whole rigid structure of wood plastic integral type with third fixed knot structure and wooden core structure for structural strength and rigidity after wrapping up through third fixed knot structure are higher, effectively promote fossil fragments wholeness ability, solved the brittle failure of traditional square timber fossil fragments, the problem that the utilization ratio is low.
According to one aspect of the invention, the first fixation structure is made of polypropylene. So set up, can make through thermoplastic forming's mode with each layer of wood core bonding formation one whole through first fixed knot structure, guarantee basic joint strength, guarantee that the wood core of range upon range of connects compactness and stability.
According to one scheme of the invention, the second fixing structure is high-strength polyester yarns which are uniformly wound and bound on the periphery of the wood core structure at intervals of 3cm at an angle of 60 degrees along the length direction of the wood core structure; the high-strength polyester yarn is resistant to high temperature of 300 ℃, and the outer side of the high-strength polyester yarn is subjected to hot pressing of the polypropylene resin composite material by a hot press at the heating temperature of 80 ℃. The high-strength polyester yarn has the advantages of high tensile strength, small extension force, strong reinforcement capability, wear resistance, corrosion resistance, light weight and the like, so wood can be effectively bound, and the shearing resistance and the overall stability of the wood core structure can be effectively enhanced by adopting a winding process (namely conveying compression molding battens (namely the wood core structure) through the reciprocating winding operation of a winding host machine, and uniformly winding the high-strength polyester yarn on the battens to fasten the battens together so as to form an organic whole). Meanwhile, the high-strength polyester yarn can resist high temperature of above 300 ℃ and is convenient for carrying out thermoplastic technology. After winding and binding are completed, the polypropylene resin composite material is required to be arranged on the feeding hopper of the hot press, and the polypropylene resin composite material is required to be pumped to the hopper in advance for heating and dehumidifying, so that the effect of hot pressing the polyethylene resin material on the high-strength polyester yarns is prevented from being influenced by excessive moisture.
According to one aspect of the present invention, the third fixing structure includes at least two polymer composite layers laminated and wrapped around the periphery of the second fixing structure and the wood core structure. So set up, can make through integrated into one piece's third fixed knot structure parcel in the periphery of second fixed knot structure and wooden core structure, effectively improve fossil fragments's compactness, wholeness, play to increase the whole tensile bending strength of batten, wear-resisting, ageing resistance effect, improve the ductility.
According to an aspect of the present invention, the third fixing structure includes: a first polymer composite layer and a second polymer composite layer; the first polymer composite layer is wrapped on the periphery of the wood core structure and the second fixing structure; the second polymer composite layer is wrapped on the periphery of the first polymer composite layer. The third fixing structure further includes: a first connection layer and a second connection layer; the first connecting layer is arranged between the first polymer composite layer and the wood core structure and between the first polymer composite layer and the second fixing structure, and is used for connecting the first polymer composite layer with the wood core structure and the second fixing structure; the second connecting layer is arranged between the first polymer composite layer and the second polymer composite layer and is used for connecting the first polymer composite layer and the second polymer composite layer; the first and second tie layers are made of polypropylene. By the arrangement, the first polymer composite layer, the second polymer composite layer and the wood core structure are secondarily formed in a thermoplastic mode through the wood-plastic integrated forming method, the formed wood core structure is wrapped with the two polymer composite layers, compactness and integrity are effectively improved, and the overall tensile and bending strength, wear resistance and ageing resistance of the keel are improved.
According to one scheme of the invention, the first polymer composite layer and the second polymer composite layer are formed by presoaking high-strength fibers and polypropylene, the tensile strength of the first polymer composite layer and the second polymer composite layer is more than 800MPa, the fiber content is more than 70%, and the thickness is 0.2mm. By the arrangement, the polymer composite layer can form a compact fully-wrapped outer surface outside the laminated wood core structure, and corrosion of the wood core and the adhesive material is effectively avoided.
According to one aspect of the present invention, the novel composite regenerative keel of the present invention further comprises: and the rough surface is arranged on the outer wall of the third fixing structure. The surface of the third fixing structure adopts a cooling embossing process to form a rough surface, so that the surface is attractive, and meanwhile, the phenomenon of overheat gluing caused by long-time embossing is avoided. Specifically, the cooling embossing process is realized through an embossing device and a cooling system, and the cooling is used for avoiding overheat adhesive caused by long-time work of the embossing device. The rough surface is formed after cooling and embossing, which is convenient for construction and use and improves the aesthetic property of the product.
According to one aspect of the invention, it is also possible to provide polypropylene plugs on the wood core structure, i.e. tapered grout holes are provided on each layer of wood core, and the tapered grout holes are arranged concentrically and in edge alignment (oblique alignment). By means of the arrangement, when the wood cores are mutually bonded through the polypropylene bolts formed by the grouting holes, polypropylene between the wood cores can flow into the polypropylene bolts through extrusion, so that the wood cores are further bonded and fixed through the through holes formed in the middle of the wood cores, reinforcement of the wood cores can be effectively achieved before the second fixing structure is bound, the wood cores are reinforced from the middle of the wood cores and the inside of the wood cores, the wood core structure is made into an organic whole with higher strength, and the basic strength is guaranteed. Moreover, if polypropylene among the wood cores of each layer flows into the polypropylene bolt and is insufficient to bond the wood cores of each layer, the polypropylene bolt can be plugged by pouring an adhesive into the polypropylene bolt in a grouting mode, so that the wood cores of each layer are firmly bonded and fixed from the inside, and the bonding strength is effectively improved.
According to one scheme of the invention, the cross section shape of each conical grouting hole is similar to a diamond, the aperture of a smaller hole in each conical grouting hole is 6mm, the aperture of a larger hole is 8mm, and the height of each conical grouting hole is 70mm; and corresponding conical grouting holes are formed in each layer of wood core at intervals of 200mm along the length direction of the wood core. By the arrangement, the integral connection strength of the wood core structure is higher and more uniform, the capability of resisting external force is stronger, the integral rigidity strength is high, and the problem that the core strength is insufficient to be loose in the use process is effectively avoided. Moreover, the design of the diamond-like polypropylene bolt can enable the speed of stacking bonding materials such as polypropylene and the like from bottom to top to be faster, dead angles which cannot be achieved by the bonding agent cannot be formed at the lower part, the bonding area of the bonding agent at the center of gravity (center) part of the wood core structure and the wood core is larger, the bonding is firmer and more reliable, the overall core strength of the wood core structure 1 is effectively improved, the core strength of the keel is effectively improved, the capability of resisting external force is improved, and various defects of the keel in the traditional scheme are overcome.
According to the scheme of the invention, the brittle bending fracture of the keel wood core can be prevented, the structural ductility is increased, and the shearing and bending strength of the keel structure is improved; meanwhile, the contact between wood and polypropylene resin materials and air can be reduced, the durability of a keel structure is improved, the turnover rate of the materials is improved, the recycling of waste materials is realized, and the environment is protected.
Drawings
Figure 1 schematically illustrates a cross-sectional view of a novel composite regenerated keel according to an embodiment of the invention;
figure 2 schematically illustrates a flow chart for the fabrication of a new composite regenerated keel in accordance with the invention;
FIG. 3 is a graph showing the four-point bending test results of the present invention and conventional laminated wood.
Detailed Description
The present disclosure will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are merely to enable those of ordinary skill in the art to better understand and thus practice the teachings of the present invention and do not imply any limitation on the scope of the invention.
As used herein, the term "comprising" and variants thereof are to be interpreted as meaning "including but not limited to" open-ended terms. The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment.
Figure 1 schematically illustrates a cross-sectional view of a novel composite regenerated keel according to an embodiment of the invention. As shown in fig. 1, in the present embodiment, a novel composite regenerative keel includes:
the wood core structure 1 is formed by stacking a plurality of layers of wood cores 2;
the first fixing structure 3 is arranged between the wood cores 2 and fixedly connects the wood cores 2;
the second fixing structure 4 is wound and bound on the periphery of the wood core structure 1 to fix the wood core structure 1;
the third fixing structure 5 is arranged at the periphery of the second fixing structure 4 and the wood core structure 1 and is formed with the wood core structure 1 in a thermoplastic mode. By the arrangement, the wood cores 2 of the layers can be connected together through the first fixing structure 3, a connecting foundation of the wood cores of the layers, which are vertically stacked, is formed, and the connecting strength of the foundation is ensured. Then, the second fixing structure 4 is used for winding and binding from the periphery (namely the outer wall in the length direction) of the wood core structure 1, so that the wood core structure 1 is further fixed from the outer side on the basis of the first fixing structure 3 to form a whole with higher strength. Further, the periphery of the second fixing structure 4 and the wood core structure 1 (namely, the outer wall of the wood core structure 1 in the length direction and the outer wall of the second fixing structure 4 bound on the outer wall of the wood core structure 1) are wrapped through the third fixing structure 5, and the third fixing structure 5 and the wood core structure 1 form an integral wood-plastic rigid structure in a thermoplastic molding mode, so that the structural strength and the rigidity after being wrapped through the third fixing structure 5 are higher, the integral performance of the keel is effectively improved, and the problems of brittle fracture and low utilization rate of the traditional square wood keel are solved.
Further, in the present embodiment, the first fixing structure 3 is made of polypropylene. So set up, can make through thermoplastic forming's mode with each layer of wood core 3 bonding formation one whole through first fixed knot structure 3, guarantee basic joint strength, guarantee that the wood core 3 of range upon range of connects compactness and stability.
Further, in this embodiment, the second fixing structure 4 is high-strength polyester yarn, and the high-strength polyester yarn is uniformly wound and bound on the periphery of the wood core structure 1 at intervals of 3cm at an angle of 60 ° along the length direction of the wood core structure 1;
the high-strength polyester yarn is resistant to high temperature of 300 ℃, and the outer side of the high-strength polyester yarn is subjected to hot pressing of the polypropylene resin composite material by a hot press at the heating temperature of 80 ℃. The high-strength polyester yarn has the advantages of high tensile strength, small extension force, strong reinforcement capability, wear resistance, corrosion resistance, light weight and the like, so wood can be effectively bound, and the shearing resistance and the overall stability of the wood core structure 1 can be effectively enhanced by adopting a winding process (namely conveying compression molding battens (namely a wood core structure) through the reciprocating winding operation of a winding host machine, and uniformly winding the high-strength polyester yarn on the battens to fasten the battens together so as to form an organic whole). Meanwhile, the high-strength polyester yarn can resist high temperature of above 300 ℃ and is convenient for carrying out thermoplastic technology. In this embodiment, after winding and binding are completed, the polypropylene resin composite material needs to be put on the feeding hopper of the hot press, and the polypropylene resin composite material needs to be pumped to the hopper in advance for heating and dehumidifying, so that the effect of hot pressing the polyethylene resin material on the high-strength polyester yarn is prevented from being influenced by excessive moisture, and the heating temperature is 80 ℃.
Further, as shown in fig. 1, in the present embodiment, the third fixing structure 5 includes at least two polymer composite layers laminated and wrapped around the second fixing structure 4 and the periphery of the wood core structure 1. By the arrangement, the third fixing structure 5 formed integrally can be wrapped on the periphery of the second fixing structure 4 and the periphery of the wood core structure 1, so that the compactness and the integrity of the keels are effectively improved, and the integral tensile and bending strength, the wear resistance and the ageing resistance of the battens are improved, and the ductility is improved.
Further, as shown in fig. 1, in the present embodiment, the third fixing structure 5 includes: a first polymer composite layer 6 and a second polymer composite layer 7;
the first polymer composite layer 6 is wrapped on the periphery of the wood core structure 1 and the second fixing structure 3;
the second polymer composite layer 7 is wrapped on the periphery of the first polymer composite layer 6.
In the present embodiment, the third fixing structure 5 further includes: a first connection layer 8 and a second connection layer 9;
the first connecting layer 8 is arranged between the first polymer composite layer 6 and the wood core structure 1 and between the first polymer composite layer 6 and the second fixing structure 4, and is used for connecting the first polymer composite layer 6 with the wood core structure 1 and the second fixing structure 4;
the second connecting layer 9 is arranged between the first polymer composite layer 6 and the second polymer composite layer 7 and connects the first polymer composite layer 6 and the second polymer composite layer 7;
the first connection layer 8 and the second connection layer 9 are made of polypropylene. By the arrangement, the first polymer composite layer 6, the second polymer composite layer 7 and the wood core structure 1 can be subjected to secondary thermoplastic molding through a wood-plastic integrated molding method, and the molded wood core structure 1 is externally wrapped with the two polymer composite layers, so that compactness and integrity are effectively improved, and the overall tensile and bending strength, wear resistance and ageing resistance of the keel are improved.
In the present embodiment, the first polymer composite layer 6 and the second polymer composite layer 7 are pre-impregnated with high-strength fibers and polypropylene, and the tensile strength of the first polymer composite layer 6 and the second polymer composite layer 7 is greater than 800MPa, the fiber content is greater than 70%, and the thickness is 0.2mm. By the arrangement, the polymer composite layer can form a compact fully-wrapped outer surface on the outer side of the laminated wood core structure 1, and corrosion of the wood core and the adhesive material is effectively avoided.
Further, in the present embodiment, the polypropylene has a tensile strength of > 20MPa, an elongation at break of > 30%, a flexural strength of > 30MPa, and a notched impact of > 150J.
Further, as shown in fig. 1, in the present embodiment, the novel composite regenerated keel of the invention further comprises: rough surface 10, rough surface 10 is provided on the outer wall of third fixed structure 5. In this embodiment, the surface of the third fixing structure 5 is formed into the rough surface 10 by adopting a cooling embossing process, so that the surface is attractive, and meanwhile, the phenomenon of overheat gluing caused by long-time embossing is avoided. Specifically, the cooling embossing process is realized through an embossing device and a cooling system, and the cooling is used for avoiding overheat adhesive caused by long-time work of the embossing device. The rough surface 10 is formed after cooling and embossing, which is convenient for construction and use and improves the aesthetic property of the product.
Furthermore, as shown in fig. 1, in the present embodiment, it is also possible to provide polypropylene plugs 12 on the wooden core structure 1, that is, tapered grouting holes 11 are provided on each layer of the wooden core 2, and the tapered grouting holes 11 are concentrically arranged with edges aligned (inclined alignment). By means of the arrangement, when the wood cores 2 are mutually bonded through the polypropylene bolts formed by the grouting holes 11, polypropylene between the wood cores 2 can flow into the polypropylene bolts 12 through extrusion, so that the wood cores 2 are further bonded and fixed through the through holes formed in the middle of the wood cores 2, reinforcement of the wood cores 2 between the wood cores 2 and inside the wood cores 2 before the second fixing structure 4 is bound can be effectively achieved, the wood core structure 1 forms an organic whole with higher strength, and basic strength is guaranteed. Moreover, if the polypropylene among the wood cores 2 flows into the polypropylene bolts 12 and is insufficient to bond the wood cores 2, the polypropylene bolts 12 can be plugged by pouring an adhesive into the polypropylene bolts 12 in a grouting mode, so that the wood cores 2 of the layers are firmly bonded and fixed from the inside, and the bonding strength is effectively improved.
Further, as shown in fig. 1, in the present embodiment, each of the tapered grouting holes 11 is formed in a diamond-like shape (i.e., a shape with narrow upper and lower ends and wide middle in fig. 1), the smaller hole in each of the tapered grouting holes 11 has a diameter of 6mm, the larger hole has a diameter of 8mm, and each of the tapered grouting holes 11 has a height of 70mm;
corresponding conical grouting holes 11 are arranged on each layer of wood core 2 every 200mm along the length direction of the wood core 2. By the arrangement, the integral connection strength of the wood core structure 1 can be higher and more uniform, the capability of resisting external force is stronger, the integral rigidity strength is high, and the problem that the core strength is insufficient to be loose in the use process is effectively avoided. Moreover, the design of the rhombic polypropylene bolt 12 can enable the speed of stacking bonding materials such as polypropylene and the like from bottom to top to be faster, dead angles which cannot be achieved by the bonding agent cannot be formed at the lower part, the bonding area of the bonding agent at the center of gravity (center) of the wood core structure 1 and the wood core is larger, the bonding is firmer and more reliable, the overall core strength of the wood core structure 1 is effectively improved, the core strength of the keel is effectively improved, the capability of resisting external force is improved, and various defects of the keel in the traditional scheme are overcome.
In the invention, the polypropylene bolt 12 is formed on the wood core structure 1, and after the fixing of each layer of wood core 2 is finished through the polypropylene bolt 12, the second fixing structure and other structures are wound and bound, so that the strength of the keel core can be ensured to the greatest extent, and the keel performance is improved.
According to the scheme of the invention, in practice, the waste wood templates are cut, extruded and glued, then the high-strength polyester yarns are wound and bound, then the high-strength polyester yarns are subjected to secondary thermoplastic molding through the high-molecular composite layer and the polyethylene resin (pp material), and finally the finished products are formed and cut for use after cooling and embossing on the outer wall of the high-molecular composite layer, and the flow is shown in figure 2.
As shown in figure 3, the four-point bending test is carried out by adopting the invention and the traditional unreinforced glued wood, and the result shows that the invention effectively improves the bending rigidity of the keels. The damage form of the traditional glued wood is changed, and the traditional brittle fracture is changed into ductile fracture.
According to the scheme, the brittle bending fracture of the keel wood core can be prevented, the structural ductility is increased, and the shearing strength and the bending strength of the keel structure are improved; meanwhile, the contact between wood and polypropylene resin materials and air can be reduced, the durability of a keel structure is improved, the turnover rate of the materials is improved, the recycling of waste materials is realized, and the environment is protected.
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (12)
1. Novel compound regeneration fossil fragments, its characterized in that includes:
the wood core structure (1) is formed by stacking a plurality of layers of wood cores (2);
the first fixing structure (3) is arranged between the wood cores (2) of each layer and fixedly connects the wood cores (2) of each layer;
the second fixing structure (4) is wound and bound on the periphery of the wood core structure (1) to fix the wood core structure (1);
and the third fixing structure (5) is arranged on the periphery of the second fixing structure (4) and the wood core structure (1) and is formed by thermoplastic molding with the wood core structure (1).
2. A new composite regenerating keel according to claim 1, wherein said first anchoring structure (3) is made of polypropylene.
3. The novel composite regenerated keel according to claim 1, wherein the second fixing structure (4) is high-strength polyester yarns, and the high-strength polyester yarns are uniformly wound and bound on the periphery of the wood core structure (1) at intervals of 3cm at an angle of 60 degrees along the length direction of the wood core structure (1);
the high-strength polyester yarn is resistant to high temperature of 300 ℃, and the outer side of the high-strength polyester yarn is subjected to hot pressing of the polypropylene resin composite material through a hot press when the heating temperature is 80 ℃.
4. The new composite regenerated keel according to claim 1, wherein said third anchoring structure (5) comprises at least two layers of polymeric composite layers laminated and wrapped around the periphery of said second anchoring structure (4) and said wood core structure (1).
5. The new composite regenerating keel according to claim 1, wherein said third fixing structure (5) comprises: a first polymer composite layer (6) and a second polymer composite layer (7);
the first polymer composite layer (6) is wrapped on the periphery of the wood core structure (1) and the periphery of the second fixing structure (3);
the second polymer composite layer (7) is wrapped on the periphery of the first polymer composite layer (6).
6. The new composite regenerative keel according to claim 5, wherein said third fixed structure (5) further comprises: a first connection layer (8) and a second connection layer (9);
the first connecting layer (8) is arranged between the first polymer composite layer (6) and the wood core structure (1) and the second fixing structure (4), and is used for connecting the first polymer composite layer (6) with the wood core structure (1) and the second fixing structure (4);
the second connecting layer (9) is arranged between the first polymer composite layer (6) and the second polymer composite layer (7) and is used for connecting the first polymer composite layer (6) and the second polymer composite layer (7);
the first connection layer (8) and the second connection layer (9) are made of polypropylene.
7. The novel composite regenerated keel according to claim 5, wherein said first polymer composite layer (6) and said second polymer composite layer (7) are pre-impregnated with high-strength fibers and polypropylene, said polymer composite layers having a tensile strength of > 800MPa, a fiber content of > 70% and a thickness of 0.2mm.
8. The new composite regenerated keel according to claim 7, wherein said polypropylene has a tensile strength > 20MPa, an elongation at break > 30%, a flexural strength > 30MPa, and a notched impact > 150J.
9. The novel composite regenerated keel according to any of claim 1, further comprising: and the rough surface (10) is arranged on the outer wall of the third fixing structure (5).
10. The novel composite regenerated keel according to claim 9, wherein said roughened surface (10) is formed by a temperature-reducing embossing process.
11. The new composite regenerated keel according to any of the claims 1-10, wherein the layers of wood core (2) are provided with conical grouting holes (11) and wherein the conical grouting holes (11) are arranged concentrically and in edge alignment.
12. The novel composite regenerated keel according to claim 11, wherein the cross-sectional shape of each of said tapered grout holes (11) is diamond-like, the pore diameter of the smaller pore in each of said tapered grout holes (11) is 6mm, the pore diameter of the larger pore is 8mm, and the height of each of said tapered grout holes (11) is 70mm;
and arranging corresponding conical grouting holes (11) on each layer of the wood core (2) every 200mm along the length direction of the wood core (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311431360.2A CN117432069A (en) | 2023-10-31 | 2023-10-31 | Novel composite regenerated keel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311431360.2A CN117432069A (en) | 2023-10-31 | 2023-10-31 | Novel composite regenerated keel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117432069A true CN117432069A (en) | 2024-01-23 |
Family
ID=89545789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311431360.2A Pending CN117432069A (en) | 2023-10-31 | 2023-10-31 | Novel composite regenerated keel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117432069A (en) |
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2023
- 2023-10-31 CN CN202311431360.2A patent/CN117432069A/en active Pending
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