CN112936923A - Environment-friendly co-extruded wood manufacturing method - Google Patents
Environment-friendly co-extruded wood manufacturing method Download PDFInfo
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- CN112936923A CN112936923A CN202110117487.1A CN202110117487A CN112936923A CN 112936923 A CN112936923 A CN 112936923A CN 202110117487 A CN202110117487 A CN 202110117487A CN 112936923 A CN112936923 A CN 112936923A
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Images
Classifications
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- 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
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- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- 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
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- 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
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- 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
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- B29C48/885—External treatment, e.g. by using air rings for cooling tubular films
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- 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
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- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
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- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
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- 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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/16—Straightening or flattening
- B29C53/18—Straightening or flattening of plates or sheets
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- 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
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
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- 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
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/48—Preparation of the surfaces
- B29C63/481—Preparation of the surfaces mechanically
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0085—Use of fibrous compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2497/00—Characterised by the use of lignin-containing materials
- C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
Abstract
The invention discloses a method for manufacturing environment-friendly co-extruded wood; s1, extruding the plastic-wood material and the coating material; s2, arranging the plastic-wood material and the cladding material in a co-extrusion die through a co-extrusion composite machine head; s3, repeatedly heating the plastic-wood material plate through a hot roller shaft, and polishing and grinding through a polishing machine; s4, performing hot coating on the plastic wood material plate; s5, fixing the length of the plastic-wood material plate, and cutting the plastic-wood material plate through a cutting device; according to the invention, the co-extrusion of the plastic-wood material and the coating material is realized through the co-extrusion composite machine head, the cooled and shaped plate is repeatedly rolled through the hot roller shaft, so that the surface of the plate can be smooth and flat, then the film is coated on the surface of the plate, and further the corrosion resistance and the wear resistance of the plate can be improved, and the carbonized wood powder and bamboo charcoal fiber adopted as the raw materials of the plate can increase the lubricity and also can increase the toughness and the connectivity.
Description
Technical Field
The invention belongs to the technical field of plastic-wood boards, and particularly relates to an environment-friendly co-extruded plastic-wood manufacturing method.
Background
Through the autonomous development of over ten years, the wood-plastic composite material has gradually developed into a new industry. In recent years, domestic enterprises accelerate the application and development of wood-plastic composite materials in the fields of interior decoration, furniture and the like, and obtain good results, the plastic wood, namely the plastic-wood composite material, is a novel composite material which is briskly developed in recent years at home and abroad, and means a plate or a section which is produced by mixing more than 35-70% of waste plant fibers such as wood flour, rice hulls, straws and the like with common resin adhesives by using polyethylene, polypropylene, polyvinyl chloride and the like to replace the common resin adhesives and then carrying out plastic processing technologies such as extrusion, die pressing, injection molding and the like. The method is mainly used in industries such as building materials, furniture, logistics packaging and the like. The board is made by mixing plastic and wood powder according to a certain proportion and then performing hot extrusion molding, and is called an extrusion plastic-wood composite board, and the plastic-wood composite material contains plastic, so that the board has better elastic modulus. In addition, the fiber is contained and is fully mixed with the plastic, so the wood composite material has physical and mechanical properties of compression resistance, bending resistance and the like which are equivalent to those of hardwood, and the durability of the wood composite material is obviously superior to that of common wood materials. The surface hardness is high, and is generally 2-5 times of that of wood, however, various plastic-wood boards in the market still have various problems.
If the authorized bulletin number is CN104723635A, the wood-like co-extruded plastic wood profile and the preparation method thereof realize that the wood-like co-extruded plastic wood profile comprises a surface layer and a base material, and only the function of the surface layer is strengthened, so that the plastic wood profile is low in price, excellent in water resistance, corrosion resistance and aging resistance, durable in use, strong in wood texture and good in user experience; in the aspect of granulation and extrusion processes of the surface layer material, the manufacturing process adopts a mode that the main material and the auxiliary material are respectively granulated, stirred, mixed and extruded, and the surface layer material with different colors and different heating fluidity is used, so that the effect of color depth level change can be provided for the surface layer of the co-extruded section, and compared with the common monochromatic wood-grain-like co-extruded wood section, the wood texture of the wood-plastic section is stronger, and the user experience is improved; the base material granulation method is characterized in that after a machine head or a granulation mould of the existing granulation extruder is detached, the plastic wood block material in a molten state extruded from the granulation extruder is directly discharged without the procedures of strip forming and granule cutting of the granulation mould, so that the production efficiency of the granulation extruder is improved; the surface treatment process adjusts the traditional wood grain pressing mode of a hot roller hot stamping cold plate into a cold roller hot plate pressing mode, avoids the problem that the texture edge of a hot stamping mode has burrs, solves the problem that the hot roller hot stamping wood grain effect is too flat, and moulds the surface of a section bar to have a certain degree of fluctuation along with the texture, is closer to the wood grain effect of an outdoor solid wood section bar, has strong wood texture and obviously improves user experience.
Disclosure of Invention
The invention aims to provide a method for manufacturing environment-friendly co-extruded wood, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the environment-friendly co-extruded wood manufacturing method comprises the following steps:
s1, extruding the thermoplastic wood-plastic material through a single-screw extruder, and extruding the cladding material through another group of single-screw extruders;
s2, discharging the extruded plastic-wood material and the cladding material in a co-extrusion die through a co-extrusion composite machine head, controlling the thickness of the cladding material to be 0.2-0.3mm, keeping the same extrusion rate of the plastic-wood material and the cladding material, and then cooling and vacuum-shaping the extruded material in the co-extrusion die;
s3, repeatedly heating the cooled and shaped plastic-wood material plate through a heating roller shaft to enable the surface of the plastic-wood material plate to be smooth, and polishing the plastic-wood material plate through a polishing machine;
s4, carrying out traction conveying on the plastic-wood material plate, carrying out hot film covering on the plastic-wood material plate during the traction conveying, wherein the plastic-wood material plate can be kept to be corrosion-resistant and wear-resistant through the film covering, and the plastic-wood material plate is pressed and bubbles are discharged through a roller shaft during the film covering;
s5, after the plastic-wood material plate is covered with the film, the plastic-wood material plate is fixed in length, and after the length is determined, the plastic-wood material plate is cut through the cutting device, so that the production of the plastic-wood material plate is completed.
Preferably, the single-screw extruder used for the wood-plastic material in S1 is generally a 65/132 single-screw extruder, and the other group of single-screw extruders used for the coating material is generally a 45/25 single-screw extruder.
Preferably, the debugging of the co-extrusion composite head in S2 adopts different methods according to the difference of the co-extrusion die structure, that is, the method includes firstly adjusting the plastic-wood material, then adjusting the coating material, and simultaneously adjusting the plastic-wood material and the coating material.
Preferably, when the co-extrusion die is used for cooling and vacuum shaping, the cooling mode comprises circulating water cooling and air cooling, and the vacuum shaping realizes air discharge in the co-extrusion die through a vacuum pump, so that a vacuum environment can be kept in the co-extrusion die.
Preferably, the temperature of the hot roller shaft in S3 is maintained at 90-150 ℃, the given pressure on the hot roller shaft is maintained at 20-60N, the polishing surface of the polishing machine adopts the polishing mesh number of 1800-3000, and the polishing machine performs wax coating for polishing at the end of polishing.
Preferably, the drawing speed of the drawing machine in S4 is maintained at 10cm/S, the drawing machine is kept at a constant speed for running, and the hot air temperature of the coating film is controlled at 30-40 ℃.
Preferably, the coating material must be dried before being extruded, the drying time is not less than 4 hours, and the drying temperature is 30-80 ℃.
Preferably, the weight components of the raw materials in the plastic-wood material are as follows: 80-90 parts of PVC resin, 40-60 parts of wood powder, 30-40 parts of plant fiber, 8-15 parts of antifouling agent, 4.2-6.4 parts of talcum powder, 2-6 parts of antioxidant, 2-4 parts of coupling agent, 2-4 parts of paraffin, 10-14 parts of filler, 8-16 parts of modifier, 3-7 parts of stabilizer, 0.8-1.6 parts of dispersing agent and 0.6-1.5 parts of foaming agent, wherein the coating comprises PMMA (polymethyl methacrylate) coating, PVC (polyvinyl chloride) coating and ASA (acrylonitrile styrene acrylate) coating.
Preferably, the wood flour is the wood flour baked at high temperature and fire insulation, the particle diameter of the wood flour is kept between 1nm and 3nm, and the plant fiber is bamboo charcoal fiber.
Preferably, after the product is demoulded, cooled and shaped, powdery substances appear on the surface of the coating material, after the product is completely cooled, obvious scratches appear on the surface of the coating material, and the surface of the coating material is subjected to hot roller and polishing treatment by adopting a hot roller shaft and a polishing machine, so that the surface of the coating material is smooth and uniform.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the co-extrusion of the plastic-wood material and the coating material is realized through the co-extrusion composite machine head, the cooling shaping is realized through the co-extrusion die, the cooled and shaped plate is repeatedly rolled through the hot roller shaft, so that the surface of the plate can be smooth and flat, then the film is coated on the surface of the plate, the corrosion resistance and the wear resistance of the plate can be further improved, the service life of the plate is further prolonged, and the carbonized wood flour and bamboo charcoal fiber adopted as the raw materials of the plate can not only increase the lubricity, but also increase the toughness and the connectivity.
Drawings
FIG. 1 is a schematic flow chart of the steps of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution:
the first embodiment is as follows:
the environment-friendly co-extruded wood manufacturing method comprises the following steps:
s1, extruding the thermoplastic wood-plastic material through a single-screw extruder, and extruding the cladding material through another group of single-screw extruders;
s2, discharging the extruded plastic-wood material and the cladding material in a co-extrusion die through a co-extrusion composite machine head, controlling the thickness of the cladding material to be 0.2mm, keeping the extrusion rates of the plastic-wood material and the cladding material to be the same, and then cooling and vacuum-shaping the extruded material in the co-extrusion die;
s3, repeatedly heating the cooled and shaped plastic-wood material plate through a heating roller shaft to enable the surface of the plastic-wood material plate to be smooth, and polishing the plastic-wood material plate through a polishing machine;
s4, carrying out traction conveying on the plastic-wood material plate, carrying out hot film covering on the plastic-wood material plate during the traction conveying, wherein the plastic-wood material plate can be kept to be corrosion-resistant and wear-resistant through the film covering, and the plastic-wood material plate is pressed and bubbles are discharged through a roller shaft during the film covering;
s5, after the plastic-wood material plate is covered with the film, the plastic-wood material plate is fixed in length, and after the length is determined, the plastic-wood material plate is cut through the cutting device, so that the production of the plastic-wood material plate is completed.
In order to realize the extrusion of the plastic-wood material and the cladding material, in this embodiment, it is preferable that the single-screw extruder used for the plastic-wood material in S1 is generally a 65/132 single-screw extruder, and the other group of single-screw extruders used for the cladding material is generally a 45/25 single-screw extruder.
In order to realize blending of the plastic-wood material and the cladding material according to actual requirements, in this embodiment, preferably, the debugging of the co-extrusion composite head in S2 adopts different methods according to different co-extrusion die structures, that is, the steps of first blending the plastic-wood material and then blending the cladding material, and simultaneously blending the plastic-wood material and the cladding material.
In order to realize cooling and shaping of the plastic-wood material plate in the co-extrusion mold, in this embodiment, preferably, the co-extrusion mold is cooled and vacuum-shaped, the cooling mode includes circulating water cooling and air cooling, and the vacuum-shaping realizes air discharge in the co-extrusion mold through a vacuum pump, so that a vacuum environment can be maintained in the co-extrusion mold.
In order to achieve the effect of maintaining the surface of the plastic-wood material board smooth and flat, in this embodiment, it is preferable that the temperature of the hot roller shaft in S3 is maintained at 90 ℃, the given pressure on the hot roller shaft is maintained at 60N, the polishing surface of the polishing machine is polished with a polishing mesh number of 1800, and the polishing machine is wax-coated at the end of polishing.
In order to realize uniform transportation, convenient operation and film covering of the plastic-wood material plate, in this embodiment, it is preferable that the traction speed of the traction machine in S4 is maintained at 10cm/S, and the traction machine is kept at a uniform speed for traveling, and the temperature of hot air for film covering is controlled at 30 ℃.
In order to realize the drying treatment of the coating film and maintain the viscosity of the coating film, in this embodiment, preferably, the coating material must be dried before being extruded, the drying time is not less than 4 hours, and the drying temperature is 30 ℃.
In order to improve the characteristics of the plastic-wood material board, in this embodiment, it is preferable that the plastic-wood material includes the following raw materials by weight: 80 parts of PVC resin, 40 parts of wood powder, 30 parts of plant fiber, 8 parts of antifouling agent, 4.2 parts of talcum powder, 2 parts of antioxidant, 2 parts of coupling agent, 2 parts of paraffin, 10 parts of filler, 8 parts of modifier, 3 parts of stabilizer, 0.8 part of dispersing agent and 0.6 part of foaming agent, wherein the coating material comprises PMMA coating material, PVC coating material and ASA coating material.
In order to increase the lubricity and the connectivity of the plastic-wood material board, in the embodiment, it is preferable that the wood flour is the wood flour baked at high temperature and without fire, the particle diameter of the wood flour is kept at 1nm, and the bamboo charcoal fiber is used as the plant fiber.
In order to smooth the surface of the plastic-wood material plate, in this embodiment, preferably, after the product is demolded, cooled and shaped, a powdery substance appears on the surface of the coating material, after the product is completely cooled, a remarkable scratch appears on the surface of the coating material, and the hot roller and the polishing machine are used for performing hot roller and polishing treatment on the surface of the coating material, so that the surface of the coating material is smooth and uniform.
Example two:
the environment-friendly co-extruded wood manufacturing method comprises the following steps:
s1, extruding the thermoplastic wood-plastic material through a single-screw extruder, and extruding the cladding material through another group of single-screw extruders;
s2, discharging the extruded plastic-wood material and the cladding material in a co-extrusion die through a co-extrusion composite machine head, controlling the thickness of the cladding material to be 0.3mm, keeping the extrusion rates of the plastic-wood material and the cladding material to be the same, and then cooling and vacuum-shaping the extruded material in the co-extrusion die;
s3, repeatedly heating the cooled and shaped plastic-wood material plate through a heating roller shaft to enable the surface of the plastic-wood material plate to be smooth, and polishing the plastic-wood material plate through a polishing machine;
s4, carrying out traction conveying on the plastic-wood material plate, carrying out hot film covering on the plastic-wood material plate during the traction conveying, wherein the plastic-wood material plate can be kept to be corrosion-resistant and wear-resistant through the film covering, and the plastic-wood material plate is pressed and bubbles are discharged through a roller shaft during the film covering;
s5, after the plastic-wood material plate is covered with the film, the plastic-wood material plate is fixed in length, and after the length is determined, the plastic-wood material plate is cut through the cutting device, so that the production of the plastic-wood material plate is completed.
In order to realize the extrusion of the plastic-wood material and the cladding material, in this embodiment, it is preferable that the single-screw extruder used for the plastic-wood material in S1 is generally a 65/132 single-screw extruder, and the other group of single-screw extruders used for the cladding material is generally a 45/25 single-screw extruder.
In order to realize blending of the plastic-wood material and the cladding material according to actual requirements, in this embodiment, preferably, the debugging of the co-extrusion composite head in S2 adopts different methods according to different co-extrusion die structures, that is, the steps of first blending the plastic-wood material and then blending the cladding material, and simultaneously blending the plastic-wood material and the cladding material.
In order to realize cooling and shaping of the plastic-wood material plate in the co-extrusion mold, in this embodiment, preferably, the co-extrusion mold is cooled and vacuum-shaped, the cooling mode includes circulating water cooling and air cooling, and the vacuum-shaping realizes air discharge in the co-extrusion mold through a vacuum pump, so that a vacuum environment can be maintained in the co-extrusion mold.
In order to realize that the surface of the plastic-wood material plate can be kept smooth and flat, in the embodiment, it is preferable that the temperature of the hot roller shaft in S3 is kept between 150 ℃, the given pressure on the hot roller shaft is kept at 20N, the polishing surface of the polishing machine adopts a polishing mesh number of 3000, and the polishing machine performs wax coating and polishing at the end of polishing.
In order to realize uniform transportation, convenient operation and film covering of the plastic-wood material plate, in this embodiment, it is preferable that the traction speed of the traction machine in S4 is maintained at 10cm/S, and the traction machine is kept at a uniform speed for traveling, and the temperature of hot air for film covering is controlled at 40 ℃.
In order to realize the drying treatment of the coating film and maintain the viscosity of the coating film, in this embodiment, preferably, the coating material must be dried before being extruded, the drying time is not less than 4 hours, and the drying temperature is 80 ℃.
In order to improve the characteristics of the plastic-wood material board, in this embodiment, it is preferable that the plastic-wood material includes the following raw materials by weight: 90 parts of PVC resin, 60 parts of wood powder, 40 parts of plant fiber, 15 parts of antifouling agent, 6.4 parts of talcum powder, 6 parts of antioxidant, 4 parts of coupling agent, 4 parts of paraffin, 14 parts of filler, 16 parts of modifier, 7 parts of stabilizer, 1.6 parts of dispersing agent and 1.5 parts of foaming agent, wherein the coating material comprises PMMA coating material, PVC coating material and ASA coating material.
In order to increase the lubricity and the connectivity of the plastic-wood material board, in the embodiment, it is preferable that the wood flour is the wood flour baked at high temperature and without fire, the particle diameter of the wood flour is maintained at 3nm, and the bamboo charcoal fiber is used as the plant fiber.
In order to smooth the surface of the plastic-wood material plate, in this embodiment, preferably, after the product is demolded, cooled and shaped, a powdery substance appears on the surface of the coating material, after the product is completely cooled, a remarkable scratch appears on the surface of the coating material, and the hot roller and the polishing machine are used for performing hot roller and polishing treatment on the surface of the coating material, so that the surface of the coating material is smooth and uniform.
According to the national standard (GB) of GB/T24137-2009 wood-plastic decorative board, the detection shows that the wood-plastic board has the following advantages:
compared with products produced by the existing rated plastic wood boards, the carbonized wood flour and the talcum powder added in the production of the product improve twenty percent of the surface smoothness of the existing product wood-plastic boards, and are hot rolled through the hot roll shafts, so that the wire drawing stripes on the surfaces of the plastic wood boards can be improved, then a high-mesh polishing machine can be directly used for polishing, the working efficiency is improved by fifty percent, the bamboo charcoal fibers are added in the plastic wood materials, the strength and the connection performance of the plastic wood boards can be improved by fifty percent, and the plastic wood boards can be more corrosion-resistant and wear-resistant, the service life of the plastic wood boards is prolonged by thirty percent, and compared with the prior art, various standards of the invention are improved in different degrees.
The working principle and the using process of the invention are as follows:
firstly, extruding the thermoplastic plastic-wood material through a single screw extruder, and extruding the cladding material through another group of single screw extruders;
secondly, discharging the extruded plastic-wood material and the cladding material into a co-extrusion die through a co-extrusion composite machine head, controlling the thickness of the cladding material to be 0.3mm, keeping the extrusion rates of the plastic-wood material and the cladding material to be the same, and then cooling and vacuum-shaping the extruded material in the co-extrusion die;
thirdly, repeatedly heating the cooled and shaped plastic-wood material plate through a heating roller shaft to enable the surface of the plastic-wood material plate to be smooth, and then polishing and grinding the plastic-wood material plate through a polishing machine;
fourthly, carrying out traction conveying on the plastic-wood material plate, and carrying out hot film coating on the plastic-wood material plate during the traction conveying, wherein the plastic-wood material plate can be kept to be corrosion-resistant and wear-resistant through the film coating, and the plastic-wood material plate is pressed and bubbles are discharged through a roller shaft during the film coating;
and fifthly, after the plastic-wood material plate is coated with the film, fixing the length of the plastic-wood material plate, and after the length is determined, cutting the plastic-wood material plate through a cutting device to finish the production of the plastic-wood material plate.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The method for manufacturing the environment-friendly co-extruded wood is characterized by comprising the following steps of:
s1, extruding the thermoplastic wood-plastic material through a single-screw extruder, and extruding the cladding material through another group of single-screw extruders;
s2, discharging the extruded plastic-wood material and the cladding material in a co-extrusion die through a co-extrusion composite machine head, controlling the thickness of the cladding material to be 0.2-0.3mm, keeping the same extrusion rate of the plastic-wood material and the cladding material, and then cooling and vacuum-shaping the extruded material in the co-extrusion die;
s3, repeatedly heating the cooled and shaped plastic-wood material plate through a heating roller shaft to enable the surface of the plastic-wood material plate to be smooth, and polishing the plastic-wood material plate through a polishing machine;
s4, carrying out traction conveying on the plastic-wood material plate, carrying out hot film covering on the plastic-wood material plate during the traction conveying, wherein the plastic-wood material plate can be kept to be corrosion-resistant and wear-resistant through the film covering, and the plastic-wood material plate is pressed and bubbles are discharged through a roller shaft during the film covering;
s5, after the plastic-wood material plate is covered with the film, the plastic-wood material plate is fixed in length, and after the length is determined, the plastic-wood material plate is cut through the cutting device, so that the production of the plastic-wood material plate is completed.
2. The manufacturing method of the environment-friendly co-extruded wood as claimed in claim 1, wherein the manufacturing method comprises the following steps: the single-screw extruder used for the plastic-wood material in the S1 is generally a 65/132 single-screw extruder, and the other group of single-screw extruders used for the coating materials is generally a 45/25 single-screw extruder.
3. The manufacturing method of the environment-friendly co-extruded wood as claimed in claim 1, wherein the manufacturing method comprises the following steps: the debugging of the co-extrusion composite machine head in the S2 adopts different methods according to the difference of the co-extrusion die structure, namely, the steps of firstly adjusting the plastic-wood material, then adjusting the coating material and simultaneously adjusting the plastic-wood material and the coating material are included.
4. The manufacturing method of the environment-friendly co-extruded wood as claimed in claim 1, wherein the manufacturing method comprises the following steps: the vacuum shaping device comprises a vacuum pump, a vacuum die and a co-extrusion die, wherein the vacuum die is arranged in the vacuum die, and the vacuum die is arranged in the vacuum die.
5. The manufacturing method of the environment-friendly co-extruded wood as claimed in claim 1, wherein the manufacturing method comprises the following steps: the temperature of the hot roller shaft in S3 is maintained at 90-150 ℃, the given pressure on the hot roller shaft is maintained at 20-60N, the polishing surface of the polishing machine adopts the polishing mesh number of 1800-3000, and the polishing machine carries out wax coating for polishing at the end of polishing.
6. The manufacturing method of the environment-friendly co-extruded wood as claimed in claim 1, wherein the manufacturing method comprises the following steps: the drawing speed of the drawing machine in the S4 is maintained at 10cm/S, the drawing machine is enabled to keep constant speed for running, and the hot air temperature of the film covering is controlled at 30-40 ℃.
7. The manufacturing method of the environment-friendly co-extruded wood as claimed in claim 1, wherein the manufacturing method comprises the following steps: the coating material must be dried before being extruded, the drying time is not less than 4 hours, and the drying temperature is 30-80 ℃.
8. The manufacturing method of the environment-friendly co-extruded wood as claimed in claim 1, wherein the manufacturing method comprises the following steps: the plastic-wood material comprises the following raw materials in parts by weight: 80-90 parts of PVC resin, 40-60 parts of wood powder, 30-40 parts of plant fiber, 8-15 parts of antifouling agent, 4.2-6.4 parts of talcum powder, 2-6 parts of antioxidant, 2-4 parts of coupling agent, 2-4 parts of paraffin, 10-14 parts of filler, 8-16 parts of modifier, 3-7 parts of stabilizer, 0.8-1.6 parts of dispersing agent and 0.6-1.5 parts of foaming agent, wherein the coating comprises PMMA (polymethyl methacrylate) coating, PVC (polyvinyl chloride) coating and ASA (acrylonitrile styrene acrylate) coating.
9. The manufacturing method of the environment-friendly co-extruded wood as claimed in claim 8, wherein: the wood flour is the wood flour baked at high temperature and fire insulation, the particle diameter of the wood flour is kept between 1nm and 3nm, and the plant fiber is bamboo charcoal fiber.
10. The manufacturing method of the environment-friendly co-extruded wood as claimed in claim 9, wherein: after the product is demoulded, cooled and shaped, the surface of the coating material is powdery, after the product is completely cooled, the surface of the coating material can be obviously scratched, and a hot roller shaft and a polishing machine are adopted to carry out hot roller and polishing treatment on the surface of the coating material, so that the surface of the coating material is smooth and uniform.
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| CN114311596A (en) * | 2021-12-28 | 2022-04-12 | 太仓旭莱自动化机械有限公司 | Preparation method of aluminum-plastic co-extruded wood |
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Application publication date: 20210611 |