CN113635530A - Preparation method of plastic-wood board - Google Patents
Preparation method of plastic-wood board Download PDFInfo
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- CN113635530A CN113635530A CN202110924602.6A CN202110924602A CN113635530A CN 113635530 A CN113635530 A CN 113635530A CN 202110924602 A CN202110924602 A CN 202110924602A CN 113635530 A CN113635530 A CN 113635530A
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- plastic
- extruder
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- 239000002023 wood Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 131
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 241000209094 Oryza Species 0.000 claims abstract description 45
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 45
- 235000009566 rice Nutrition 0.000 claims abstract description 45
- 239000010902 straw Substances 0.000 claims abstract description 45
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000011575 calcium Substances 0.000 claims abstract description 44
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 44
- 238000001035 drying Methods 0.000 claims abstract description 35
- 239000000835 fiber Substances 0.000 claims abstract description 29
- 239000003365 glass fiber Substances 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims description 38
- 239000002245 particle Substances 0.000 claims description 23
- -1 polypropylene Polymers 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 17
- 239000000428 dust Substances 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000004698 Polyethylene Substances 0.000 claims description 10
- 239000004743 Polypropylene Substances 0.000 claims description 10
- 230000003373 anti-fouling effect Effects 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 229920000573 polyethylene Polymers 0.000 claims description 10
- 229920001155 polypropylene Polymers 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 9
- 239000004800 polyvinyl chloride Substances 0.000 claims description 9
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 8
- 238000007605 air drying Methods 0.000 claims description 8
- 239000003963 antioxidant agent Substances 0.000 claims description 8
- 230000003078 antioxidant effect Effects 0.000 claims description 8
- 239000007822 coupling agent Substances 0.000 claims description 8
- 239000003063 flame retardant Substances 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 8
- 239000003973 paint Substances 0.000 claims description 8
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 8
- 238000012805 post-processing Methods 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 244000025254 Cannabis sativa Species 0.000 claims description 2
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 2
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 2
- 229920000742 Cotton Polymers 0.000 claims description 2
- 235000009120 camo Nutrition 0.000 claims description 2
- 235000005607 chanvre indien Nutrition 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 239000011487 hemp Substances 0.000 claims description 2
- 239000000356 contaminant Substances 0.000 abstract 1
- 239000008187 granular material Substances 0.000 description 18
- 238000001914 filtration Methods 0.000 description 12
- 229920003023 plastic Polymers 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004566 building material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 229920001587 Wood-plastic composite Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000011155 wood-plastic composite Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/27—Cleaning; Purging; Avoiding contamination
- B29C48/274—Cleaning; Purging; Avoiding contamination of the extruded articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention relates to the technical field of plastic-wood boards, and discloses a preparation method of a plastic-wood board, which comprises the following steps of S1, preparing raw materials, placing natural fibers, glass fibers, calcium powder, wood powder, rice hulls and straws into a dryer, drying at 90-110 ℃ for 3-20 minutes, controlling the water content of the natural fibers, the glass fibers and the calcium powder to be 1-3%, placing the dried rice hulls and the dried straws into a pulverizer, and rotating the pulverizer for 400 r/min at the component velocity of 200-, thereby avoiding the need for significant time to clean the surface after the presence of contaminants.
Description
Technical Field
The invention relates to the technical field of plastic-wood boards, in particular to a preparation method of a plastic-wood board.
Background
The plastic-wood material, also called wood-plastic composite material, can be understood as a plate or a section bar produced by mainly using plastics (recycled waste plastics such as polypropylene (PP), Polyethylene (PE), polyvinyl chloride (PVC) and the like) as raw materials, mixing the waste plant fibers such as wood flour, rice hull, straw and the like into a new wood material, and then carrying out plastic processing technologies such as extrusion, mould pressing, injection molding and the like. The method is mainly used in industries such as building materials, furniture, logistics packaging and the like.
The plastic wood has the characteristics of water resistance, corrosion resistance and wood texture of plastics, so that the plastic wood becomes an outdoor building material (such as a floor, a fence, a chair, a garden or a water bank landscape) with excellent performance and very durability; it can also be used to replace wooden members used in port and dock, and can also be used to replace wood to make various packages, trays and storehouse backing plates, and has wide application.
The plastic-wood material prepared by the existing preparation method can leave dust traces on the surface when the plate is formed at last, so that the surface of the plate needs to be cleaned again after the plate is formed at last, and in the transportation process, the surface of the plate can be adhered with dust, so that the plate needs to be cleaned for many times, and the appearance of the plate can be ensured.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a plastic-wood board preparation method, which has the advantages of ensuring that the board can be subjected to antifouling treatment in the board production process, avoiding dust residues on the surface in the production process and the like, and solves the problems that the surface needs to be cleaned again after the last board is formed due to the fact that dust traces are remained on the surface when the board is formed at last, and the appearance of the board can be ensured due to the fact that the dust is attached to the surface of the board in the transportation process, and the board needs to be cleaned for many times.
(II) technical scheme
In order to realize the purposes of performing antifouling treatment on the plate in the production process of the plate and avoiding the residual dust on the surface in the production process, the invention provides the following technical scheme: a preparation method of a plastic-wood board comprises the following steps:
s1, preparation of raw material
The natural fiber, the glass fiber, the calcium powder, the wood powder, the rice hull and the straw are placed in a dryer, the drying temperature is 90-110 ℃, the drying time is 3-20 minutes, and the water content of the natural fiber, the glass fiber and the calcium powder is controlled to be 1-3%.
And (2) placing the dried rice hulls and the dried straws into a pulverizer, wherein the pulverizer rotates for 400 r/min at the speed of 200-.
Putting polypropylene, polyethylene, polyvinyl chloride, a flame retardant, an antioxidant, a coupling agent, natural fibers and glass fibers into a mixer, and mixing at the speed of 60-180 r/min for 3-8 min to obtain a mixture.
S2, granulating
Preheating an extruder to 80-100 ℃, placing the mixture, the rice hull powder, the straw powder, the calcium powder and the wood powder into the extruder, heating the temperature in a cavity of the extruder to 270 ℃, heating the temperature of a machine head to 180 ℃ to 200 ℃, fusing and extruding, then, entering water for water cooling and shaping, keeping the temperature of the water at 20-60 ℃, then, cutting the extruded mixture to obtain particles, wherein the length of the particles is 5-8 mm.
S3, molding
Adding the particles into a forming extruder, wherein the temperature of a machine head is 230-250 ℃, after extrusion, the particles enter water for water cooling, after the temperature of the water is reduced to 100-120 ℃, the particles enter a wind box for air drying, and the temperature of the plate is reduced to 40-50 ℃.
S4, post-processing
After the plate comes out of the air box, the plate enters the dust-free box body, the surface of the plate is subjected to dustproof treatment, the surface is polished and polished, then the surface is subjected to dust treatment, antifouling paint is sprayed on the surface, and then the plate enters the drying box body to be dried at the temperature of 80-100 ℃ for 5-10 minutes.
Further, the natural fibers in the S1 are cotton, hemp, silk and animal hair.
Further, the ratio of the rice hull powder, the straw powder, the calcium powder and the wood powder in the S1 is 1: 1: 0.1: 2.
further, the rice hull powder, the straw powder, the calcium powder and the wood powder in the S1 are ground to obtain 500 meshes.
Further, the pellets in S2 are cut after being extruded by an extruder.
Further, the proportion of the mixture to the rice hull powder, the straw powder, the calcium powder and the wood powder is 0.5-2.
Further, the sheet material in S3 is an object extruded by the extruder according to the shape.
Further, in S4, the surface of the plate is ground by using a 1000-3000-mesh grinding wheel.
Compared with the prior art, the invention provides a plastic-wood board preparation method, which has the following beneficial effects:
1. according to the invention, the surface treatment is carried out after the plate is formed, so that the stain resistance of the surface of the plate can be improved, the plate can be cleaned conveniently at the later stage after being processed, the phenomenon that a large amount of time is needed for cleaning after pollutants exist on the surface can be avoided, and the phenomenon that water enters the interior of the plate when water cooling is carried out after the plate is formed, so that the service life of the plate is shortened can be avoided.
Detailed Description
The first embodiment is as follows:
a preparation method of a plastic-wood board comprises the following steps:
s1, preparation of raw material
The natural fiber, the glass fiber, the calcium powder, the wood powder, the rice hull and the straw are placed in a dryer, the drying temperature is 110 ℃, the drying time is 20 minutes, and the water content of the natural fiber, the glass fiber and the calcium powder is controlled to be 3%.
And (2) putting the dried rice hulls and the dried straws into a pulverizer, wherein the pulverizer rotates at a speed of 400 r/min, filtering the rice hull powder, the straw powder, the calcium powder and the wood powder, and storing the rice hull powder, the straw powder, the calcium powder and the wood powder in a dust-free manner after filtering.
Putting polypropylene, polyethylene, polyvinyl chloride, a flame retardant, an antioxidant, a coupling agent, natural fibers and glass fibers into a mixer, and mixing at the speed of 180 r/min for 8 min to obtain a mixture.
S2, granulating
Preheating an extruder to 100 ℃, placing the mixture, the rice hull powder, the straw powder, the calcium powder and the wood powder into the extruder, heating the mixture in a cavity of the extruder to 270 ℃, heating the extruder head to 200 ℃, fusing and extruding, then putting the mixture into water for water cooling and shaping, keeping the temperature of the water at 60 ℃, then cutting the extruded mixture to obtain particles, wherein the length of the particles is 8 mm.
S3, molding
Adding the granules into a forming extruder, wherein the temperature of a machine head is 250 ℃, after extrusion, adding the granules into water for water cooling, reducing the temperature of the water to 120 ℃, then adding the granules into an air box for air drying, and reducing the temperature of the plate to 50 ℃.
S4, post-processing
After the plate comes out of the air box, the plate enters the dust-free box body, the surface of the plate is subjected to dustproof treatment, the surface is polished, then the surface is subjected to dust treatment, antifouling paint is sprayed on the surface, then the plate enters the drying box body, the drying temperature is 100 ℃, and the drying time is 10 minutes.
Example two:
a preparation method of a plastic-wood board comprises the following steps:
s1, preparation of raw material
The natural fiber, the glass fiber, the calcium powder, the wood powder, the rice hull and the straw are placed in a dryer, the drying temperature is 90 ℃, the drying time is 3 minutes, and the water content of the natural fiber, the glass fiber and the calcium powder is controlled to be 1%.
And (2) putting the dried rice hulls and the dried straws into a pulverizer, wherein the pulverizer rotates at the speed of 200 r/min, filtering the rice hull powder, the straw powder, the calcium powder and the wood powder, and storing the rice hull powder, the straw powder, the calcium powder and the wood powder in a dust-free manner after filtering.
Putting polypropylene, polyethylene, polyvinyl chloride, a flame retardant, an antioxidant, a coupling agent, natural fibers and glass fibers into a mixer, and mixing at the speed of 60 r/min for 3 min to obtain a mixture.
S2, granulating
Preheating an extruder to 80 ℃, putting the mixture, the rice hull powder, the straw powder, the calcium powder and the wood powder into the extruder, heating the mixture in a cavity of the extruder to 250 ℃, keeping the temperature of a machine head at 180 ℃, fusing and extruding, putting the mixture into water for water cooling and shaping, keeping the temperature of the water at 20 ℃, cutting the extruded mixture to obtain particles, wherein the length of the particles is 5 mm.
S3, molding
Adding the granules into a forming extruder, wherein the head temperature is 230 ℃, after extrusion, adding the granules into water for water cooling, reducing the temperature in the water to 100 ℃, then adding the granules into an air box for air drying, and reducing the temperature of the plate to 40 ℃.
S4, post-processing
After the plate comes out of the air box, the plate enters the dust-free box body, the surface of the plate is subjected to dustproof treatment, the surface is polished, then the surface is subjected to dust treatment, the surface is sprayed with antifouling paint, then the plate enters the drying box body, the drying temperature is 80 ℃, and the drying time is 5 minutes.
Example three:
a preparation method of a plastic-wood board comprises the following steps:
s1, preparation of raw material
The natural fiber, the glass fiber, the calcium powder, the wood powder, the rice hull and the straw are placed in a dryer, the drying temperature is 900 ℃, the drying time is 3 minutes, and the water content of the natural fiber, the glass fiber and the calcium powder is controlled to be 3%.
And (2) putting the dried rice hulls and the dried straws into a pulverizer, wherein the pulverizer rotates at a speed of 400 r/min, filtering the rice hull powder, the straw powder, the calcium powder and the wood powder, and storing the rice hull powder, the straw powder, the calcium powder and the wood powder in a dust-free manner after filtering.
Putting polypropylene, polyethylene, polyvinyl chloride, a flame retardant, an antioxidant, a coupling agent, natural fibers and glass fibers into a mixer, and mixing at a mixing speed of 600 r/min for 8 min to obtain a mixture.
S2, granulating
Preheating an extruder to 800 ℃, putting the mixture, the rice hull powder, the straw powder, the calcium powder and the wood powder into the extruder, heating the mixture in a cavity of the extruder to 270 ℃, heating the extruder head to 200 ℃, fusing and extruding, putting the mixture into water for water cooling and shaping, keeping the temperature of the water at 20 ℃, cutting the extruded mixture, and obtaining particles after cutting, wherein the length of the particles is 8 mm.
S3, molding
Adding the granules into a forming extruder, wherein the temperature of a machine head is 250 ℃, after extrusion, adding the granules into water for water cooling, reducing the temperature of the water to 120 ℃, then adding the granules into an air box for air drying, and reducing the temperature of the plate to 40 ℃.
S4, post-processing
After the plate comes out of the air box, the plate enters the dust-free box body, the surface of the plate is subjected to dustproof treatment, the surface is polished, then the surface is subjected to dust treatment, antifouling paint is sprayed on the surface, then the plate enters the drying box body, the drying temperature is 800 ℃, and the drying time is 5 minutes.
Example four:
a preparation method of a plastic-wood board comprises the following steps:
s1, preparation of raw material
The natural fiber, the glass fiber, the calcium powder, the wood powder, the rice hull and the straw are placed in a dryer, the drying temperature is 90 ℃, the drying time is 30 minutes, and the water content of the natural fiber, the glass fiber and the calcium powder is controlled to be 1%.
And (2) putting the dried rice hulls and the dried straws into a pulverizer, wherein the pulverizer rotates at the speed of 200 r/min, filtering the rice hull powder, the straw powder, the calcium powder and the wood powder, and storing the rice hull powder, the straw powder, the calcium powder and the wood powder in a dust-free manner after filtering.
Putting polypropylene, polyethylene, polyvinyl chloride, a flame retardant, an antioxidant, a coupling agent, natural fibers and glass fibers into a mixer, and mixing at the speed of 60 r/min for 3 min to obtain a mixture.
S2, granulating
Preheating an extruder to 80 ℃, placing the mixture, the rice hull powder, the straw powder, the calcium powder and the wood powder into the extruder, heating the mixture in a cavity of the extruder to 250 ℃, heating the extruder head to 180 ℃, fusing and extruding, then putting the mixture into water for water cooling and shaping, keeping the temperature of the water at 60 ℃, then cutting the extruded mixture to obtain particles, wherein the length of the particles is 5 mm.
S3, molding
Adding the granules into a forming extruder, wherein the head temperature is 230 ℃, after extrusion, adding the granules into water for water cooling, reducing the temperature in the water to 100 ℃, then adding the granules into an air box for air drying, and reducing the temperature of the plate to 50 ℃.
S4, post-processing
After the plate comes out of the air box, the plate enters the dust-free box body, the surface of the plate is subjected to dustproof treatment, the surface is polished, then the surface is subjected to dust treatment, antifouling paint is sprayed on the surface, and then the plate enters the drying box body to be dried at the drying temperature of 80 ℃ for 50 minutes.
Example five:
s1, preparation of raw material
The natural fiber, the glass fiber, the calcium powder, the wood powder, the rice hull and the straw are placed in a dryer, the drying temperature is 100 ℃, the drying time is 15 minutes, and the water content of the natural fiber, the glass fiber and the calcium powder is controlled to be 2%.
And (2) putting the dried rice hulls and the dried straws into a pulverizer, wherein the pulverizer rotates at 300 r/min at the following speed, then filtering the rice hull powder, the straw powder, the calcium powder and the wood powder, and storing the rice hull powder, the straw powder, the calcium powder and the wood powder in a dust-free manner after filtering.
Putting polypropylene, polyethylene, polyvinyl chloride, a flame retardant, an antioxidant, a coupling agent, natural fibers and glass fibers into a mixer, and mixing at the speed of 120 r/min for 6 min to obtain a mixture.
S2, granulating
Preheating an extruder to 90 ℃, placing the mixture, the rice hull powder, the straw powder, the calcium powder and the wood powder into the extruder, heating the mixture in a cavity of the extruder to 260 ℃, keeping the temperature of a machine head at 190 ℃, fusing and extruding, then putting the mixture into water for water cooling and shaping, keeping the temperature of the water at 40 ℃, then cutting the extruded mixture to obtain particles, wherein the length of the particles is 7 mm.
S3, molding
Adding the granules into a forming extruder, wherein the head temperature is 240 ℃, after extrusion, adding the granules into water for water cooling, reducing the temperature in the water to 110 ℃, then adding the granules into an air box for air drying, and reducing the temperature of the plate to 45 ℃.
S4, post-processing
After the plate comes out of the air box, the plate enters the dust-free box body, the surface of the plate is subjected to dustproof treatment, the surface is polished, then the surface is subjected to dust treatment, antifouling paint is sprayed on the surface, then the plate enters the drying box body, the drying temperature is 90 ℃, and the drying time is 7 minutes.
Example six:
s1, preparation of raw material
The natural fiber, the glass fiber, the calcium powder, the wood powder, the rice hull and the straw are placed in a dryer, the drying temperature is 110 ℃, the drying time is 20 minutes, and the water content of the natural fiber, the glass fiber and the calcium powder is controlled to be 3%.
And (2) putting the dried rice hulls and the dried straws into a pulverizer, wherein the pulverizer rotates at the speed of 200 r/min, filtering the rice hull powder, the straw powder, the calcium powder and the wood powder, and storing the rice hull powder, the straw powder, the calcium powder and the wood powder in a dust-free manner after filtering.
Putting polypropylene, polyethylene, polyvinyl chloride, a flame retardant, an antioxidant, a coupling agent, natural fibers and glass fibers into a mixer, and mixing at the speed of 180 r/min for 8 min to obtain a mixture.
S2, granulating
Preheating an extruder to 80 ℃, putting the mixture, the rice hull powder, the straw powder, the calcium powder and the wood powder into the extruder, heating the mixture in a cavity of the extruder to 250 ℃, keeping the temperature of a machine head at 180 ℃, fusing and extruding, putting the mixture into water for water cooling and shaping, keeping the temperature of the water at 20 ℃, cutting the extruded mixture to obtain particles, wherein the length of the particles is 5 mm.
S3, molding
Adding the granules into a forming extruder, wherein the temperature of a machine head is 250 ℃, after extrusion, adding the granules into water for water cooling, reducing the temperature of the water to 120 ℃, then adding the granules into an air box for air drying, and reducing the temperature of the plate to 50 ℃.
S4, post-processing
After the plate comes out of the air box, the plate enters the dust-free box body, the surface of the plate is subjected to dustproof treatment, the surface is polished, then the surface is subjected to dust treatment, the surface is sprayed with antifouling paint, then the plate enters the drying box body, the drying temperature is 80 ℃, and the drying time is 5 minutes.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A preparation method of a plastic-wood board comprises the following steps:
s1, preparation of raw material
Placing natural fiber, glass fiber, calcium powder, wood powder, rice hull and straw into a dryer, drying at 90-110 deg.C for 3-20 min, and controlling the water content of natural fiber, glass fiber and calcium powder to 1-3%;
placing the dried rice hulls and the dried straws into a pulverizer, wherein the pulverizer rotates for 400 r/min at the speed of 200-;
putting polypropylene, polyethylene, polyvinyl chloride, a flame retardant, an antioxidant, a coupling agent, natural fibers and glass fibers into a mixer, and mixing at the speed of 60-180 r/min for 3-8 min to obtain a mixture.
S2, granulating
Preheating an extruder at the preheating temperature of 80-100 ℃, placing the mixture, the rice hull powder, the straw powder, the calcium powder and the wood powder into the extruder, heating the temperature in a cavity of the extruder to 270 ℃, the temperature of a machine head to 180-200 ℃, fusing and extruding, then, entering water for water cooling and shaping, keeping the temperature of the water at 20-60 ℃, then, cutting the extruded mixture to obtain particles, wherein the length of the particles is 5-8 mm;
s3, molding
Adding the particles into a forming extruder, wherein the temperature of a machine head is 230-250 ℃, after extrusion, the particles enter water for water cooling, after the temperature of the water is reduced to 100-120 ℃, the particles enter an air box for air drying, and the temperature of the plate is reduced to 40-50 ℃;
s4, post-processing
After the plate comes out of the air box, the plate enters the dust-free box body, the surface of the plate is subjected to dustproof treatment, the surface is polished and polished, then the surface is subjected to dust treatment, antifouling paint is sprayed on the surface, and then the plate enters the drying box body to be dried at the temperature of 80-100 ℃ for 5-10 minutes.
2. The method for preparing the plastic-wood board as claimed in claim 1, wherein the method comprises the following steps: the natural fibers in the S1 are cotton, hemp, silk and animal hair.
3. The method for preparing the plastic-wood board as claimed in claim 2, wherein the method comprises the following steps: the proportion of the rice hull powder, the straw powder, the calcium powder and the wood powder in the S1 is 1: 1: 0.1: 2.
4. the method for preparing the plastic-wood board as claimed in claim 1, wherein the method comprises the following steps: and (3) crushing the rice hull powder, the straw powder, the calcium powder and the wood powder in the S1 to obtain 500 meshes.
5. The method for preparing the plastic-wood board as claimed in claim 1, wherein the method comprises the following steps: the particles in the S2 are obtained by cutting after being extruded by an extruder.
6. The method for preparing the plastic-wood board as claimed in claim 1, wherein the method comprises the following steps: the proportion of the mixture to the rice hull powder, the straw powder, the calcium powder and the wood powder is 0.5-2.
7. The method for preparing the plastic-wood board as claimed in claim 1, wherein the method comprises the following steps: the sheet material in the S3 is an object extruded by the extruder according to the shape.
8. The method for preparing the plastic-wood board as claimed in claim 1, wherein the method comprises the following steps: in the step S4, the surface of the plate is ground by using a grinding wheel of 1000-3000 meshes.
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Application publication date: 20211112 |