Preparation process of environment-friendly extruded wood material in field of doors and windows

Abstract

The invention relates to a preparation process of an environment-friendly extruded wood material in the field of doors and windows. The low-carbon environment-friendly material is formed by adopting more than 70% of wood flour, a modified high polymer material, a lubricant, a stabilizer, a foaming agent, an electrodeless toner, a food-grade epoxy agent and other raw materials through multiple processes of pretreatment, stirring and mixing, heating and extrusion, wood particles are coated, the appearance of the material is close to that of a wood board, and the surface and the deep layer of the material are provided with textures. The wood strip and the door and window aluminum profile are tightly combined through the rolling technology to decorate the aluminum profile, the waterproof performance, the moth-proof performance, the crack resistance, the weather resistance and the fireproof performance are high, decoration can be conducted through self-contained deep texture without pasting a film, the situation that an existing decoration plate is externally pasted with a film for decoration is avoided as much as possible, and the decoration effect is good. The sticking film can age and fall off after being used for a long time, so that the decorative effect is influenced.

Description

Technical Field

[0001] The present invention belongs to the technical field of the preparation of extruded wood materials for doors and windows, and particularly relates to a preparation process of an environment-friendly extruded wood material in the field of doors and windows. Background Technique

[0002] With the development of society, the country is now vigorously promoting energy conservation and emission reduction; the industry's demand for standard specifications and products is constantly increasing. To ensure and improve the various performance of door and window products, while optimizing the product structure to promote product upgrading. In order to achieve a new material that can reduce the use of non-renewable natural raw materials on the premise of ensuring the use performance, with low energy consumption, low pollution, and low emissions during the manufacturing process, long service life, no harmful substances generated during use, and can be recycled and reproduced. Low-carbon materials achieve energy conservation and emission reduction and sustainable use throughout the production and use process; also to further improve the comprehensive performance of doors and windows, highlight the decorative performance of products, meet the new concept of modern people's pursuit of returning to nature, and adapt to the increasingly high demand of the door and window market for energy-saving products. Research and development of wood-aluminum composite profiles, reasonably combining wood and aluminum alloy profiles to make an energy-saving door and window system, saving energy, benefiting society, contributing to social development, and improving the social status of enterprises. The casement window has a large opening area, good ventilation, good airtightness, and excellent performance in sound insulation, heat preservation, and anti-seepage. It is convenient to wipe the window. Most of the existing wooden composite material window frames have poor durability, while most of the window materials of the existing casement windows are made of aluminum alloy materials, which are light in weight, firm in structure, and good in durability, but the interior decoration effect is poor and needs to be improved.

[0003] The existing method generally cuts and trims fiberboard materials to form decorative boards adapted to door and window profiles and extrudes them together with the door and window profiles, and pastes various color and texture films outside the decorative boards to improve the interior decoration effect of the door and window profiles. However, the film will age and fall off after long-term use, affecting the decorative effect. Summary of the Invention

[0004] The purpose of the present invention is to provide a preparation process of an environment-friendly extruded wood material in the field of doors and windows with a simple structure and reasonable design to solve the above problems.

[0005] The present invention realizes the above purpose through the following technical solutions:

[0006] A preparation process of an environment-friendly extruded wood material in the field of doors and windows includes the following steps:

[0007] S1, raw material preparation;

[0008] S2, raw material pretreatment;

[0009] S3, introducing the raw materials into the mixing cylinder according to the ratio, heating and stirring and mixing them;

[0010] S4. Import the raw materials into an extruder and combine them by extrusion to form extruded wood materials;

[0011] S5. Export the formed extruded board to a cooling pool for cooling and solidification;

[0012] S6. Cut and trim the solidified extruded board according to the dimensions of door and window profiles;

[0013] S7. Perform surface treatment on the cut and trimmed extruded board;

[0014] S8. Conduct appearance inspection on the treated extruded board;

[0015] S9. Conduct performance inspection on the treated extruded board;

[0016] In step S3, the stirring and mixing device is a stirring screw with a spiral structure, and the pitch and stirring speed of the stirring screw are adjusted according to the required texture of the extruded wood materials.

[0017] Furthermore, in step S1, the raw materials include wood powder, modified polymer materials, lubricants, stabilizers, foaming agents, inorganic color powders, resins, and food-grade oxidants, among which the mass of the wood powder is greater than 70% of the total mass of the overall raw materials.

[0018] Furthermore, in step S2, the raw material pretreatment includes the softening treatment of the wood powder and the proportioning of modified polymer materials, lubricants, stabilizers, foaming agents, inorganic color powders, resins, and food-grade epoxy agents. Among them, the inorganic color powder is selected according to the extruded wood materials to be formed, and the resin adopts at least one of phenolic resin and urea-formaldehyde resin.

[0019] Furthermore, the wood powder softening treatment method adopts high-temperature steaming, microwave heating treatment, or soaking treatment with liquid medicine or alkali solution. Among them, the temperature of high-temperature steaming is not lower than 150 °C, and the steaming time is not less than 3 hours.

[0020] Furthermore, in step S6, the cutting and trimming include the trimming of the edges, corners, and burrs of the formed extruded board, and also include the trimming of the shape of the extruded board according to the dimensions of the door and window profiles.

[0021] Furthermore, in step S7, the surface treatment method is fine polishing through a grinding wheel.

[0022] Furthermore, in step S8, the appearance inspection includes the inspection of the appearance quality, cracks, and color difference of the surface-treated extruded board.

[0023] Furthermore, the performance inspection includes the data inspection of density, moisture content, surface Shore hardness, surface wear resistance, Vicat softening temperature, water absorption length elongation rate, flame retardancy, and harmful substance content.

[0024] The beneficial effects of the present invention are as follows: This product is composed of more than 70% wood powder, modified polymer materials, lubricants, stabilizers, foaming agents, inorganic color powders, food-grade epoxy agents and other raw materials. Through a combination of pretreatment, stirring and mixing, heating, and extrusion processes, a low-carbon and environmentally friendly material is formed to coat the wooden particles. In appearance, it is similar to a wooden board, with natural textures on the surface and in the depth. Through the rolling process, wooden strips are tightly combined with the aluminum profiles of doors and windows to decorate the aluminum profiles. It not only has strong waterproofness, insect resistance, crack resistance, weather resistance and fire resistance, but also can be decorated through the natural textures in the depth without pasting a film. This can avoid the problem that the film pasted on the existing decorative board ages and peels off after long-term use, affecting the decorative effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the process flow chart of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following further describes the present application in detail with reference to the drawings. It is necessary to point out here that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0027] Embodiment

[0028] As Figure 1 shown, a preparation process for an environmentally friendly extruded wood material in the field of doors and windows includes the following steps:

[0029] S1, raw material preparation; the raw materials include wood powder, modified polymer materials, lubricants, stabilizers, foaming agents, inorganic color powders, resins and food-grade oxidants. Among them, the mass of the wood powder is greater than 70% of the total mass of the overall raw materials. The inorganic color powder is selected according to the extruded wood material to be formed. The resin adopts at least one of phenolic resin and urea resin to bond and combine various raw materials;

[0030] S2, raw material pretreatment; the raw material pretreatment includes the softening treatment of the wood powder and the proportioning of the modified polymer materials, lubricants, stabilizers, foaming agents, inorganic color powders, resins and food-grade epoxy agents. By selecting different contents and colors of inorganic color powders for proportioning, different textured and colored decorative stripes are formed after mixing; the softening treatment method of the wood powder adopts high-temperature steaming, microwave heating treatment or soaking treatment with liquid medicine or alkali solution. Among them, the temperature of high-temperature steaming is not lower than 150 °C, and the steaming time is not less than 3 hours;

[0031] S3. Import the raw materials into the mixing cylinder in proportion for heating and stirring and mixing; the stirring and mixing device is a stirring screw with a spiral structure, and the pitch and stirring speed of the stirring screw are adjusted according to the required texture of the extruded wood material. Since the quality of the non-polar color powder is lighter than that of other raw materials, when all the raw materials are stirred and mixed by the screw with different pitches at different rotation speeds, the centrifugal force acting on the non-polar color powder is different, resulting in different distribution conditions of the non-polar color powder, so as to achieve the purpose of forming different texture effects;

[0032] S4. Import into the extruder to extrude the raw materials to combine and form the extruded wood material; after the mixed raw materials are imported into the interior of the extruder, first heat the mixed raw materials through the heating device inside the extruder, and then adjust the extrusion pressure and the discharging speed of the extruder to extrude the mixed raw materials to form a plate-like structure;

[0033] S5. Export the formed extrusion plate to the cooling pool for cooling and solidification; the extruded plate after extrusion molding passes through the cooling pool, and the cooling pool uses circulating water to quickly cool and shape the high-temperature pressed plate to form the extrusion plate material;

[0034] S6. Cut and trim the solidified extrusion plate according to the size of the door and window profiles; the cutting and trimming include the trimming of the edges, corners and burrs of the formed extrusion plate, and also include the trimming of the shape of the extrusion plate according to the size of the door and window profiles, so as to connect the cut and trimmed extrusion plate material to the door and window profiles by rolling in the follow-up to decorate the door and window profiles;

[0035] S7. Perform surface treatment on the cut and trimmed extrusion plate; the surface treatment method is to perform fine polishing through a grinding wheel. The grinding wheel is driven by a grinding machine to rotate at a high speed to polish the surface of the extrusion plate material, so as to improve the surface flatness of the extrusion plate material and remove the burrs generated during cutting and trimming at the same time;

[0036] S8. Perform appearance and physical property inspections on the treated extrusion plate; the appearance inspection includes the inspection of the appearance quality, cracks, color difference and dimensions of the extrusion plate after surface treatment. The physical property inspections include width, length, high-temperature sustained load performance, accelerated weather resistance, etc.

[0037] The inspection standards are shown in Table 1:

[0038] Table 1

[0039]

[0040] After the inspection, re-inspection is carried out by sampling to remove defective products. For appearance and dimension inspections, according to the provisions of GB / T2828.1-2012, a normal inspection single sampling plan is adopted, with a general inspection level I and an acceptable quality level AQL6.5. For the inspection of the profiles and material properties, a sufficient number of samples are randomly selected from the samples that pass the appearance and dimension inspections;

[0041] The sampling method is shown in Table 2:

[0042] Table 2

[0043]

[0044] S9. Perform performance testing on the processed extrusion board; the performance testing includes data testing of density, moisture content, surface Shore hardness, surface wear resistance, Vicat softening temperature, water absorption length elongation rate, flame retardancy, and harmful substance content; the testing standards are shown in Table 3:

[0045] Table 3

[0046]

[0047] This product is composed of more than 70% wood powder, modified polymer materials, lubricants, stabilizers, foaming agents, inorganic color powders, food-grade epoxy agents and other raw materials. Through a combination of pretreatment, stirring and mixing, heating, extrusion and other processes, a low-carbon and environmentally friendly material is formed to coat the wooden particles. The appearance is similar to that of a wooden board, with natural textures on the surface and in the depth. Through the rolling process, the wooden strips are tightly combined with the aluminum profiles of doors and windows to decorate the aluminum profiles. It not only has strong waterproofness, insect resistance, crack resistance, weather resistance and fire resistance, but also can be decorated through the natural textures in the depth without pasting films. This can avoid the problem that the decorative film pasted on the existing decorative board will age and fall off after long-term use, affecting the decorative effect.

[0048] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An environmentally friendly extrusion wood material preparation process in the field of doors and windows, characterized in that: It includes the following steps: S1, raw material preparation; S2, raw material pretreatment; S3, import the raw materials into the mixing cylinder in proportion for heating and stirring and mixing; S4, import into the extruder to extrude the raw materials to combine and form extruded wood materials; S5, export the formed extrusion board to the cooling pool for cooling and solidification; S6, cut and trim the solidified extrusion board according to the dimensions of the door and window profiles; S7, perform surface treatment on the cut and trimmed extrusion board; S8, perform appearance inspection on the treated extrusion board; S9, perform performance inspection on the treated extrusion board; In step S3, the stirring and mixing device is a stirring screw with a spiral structure, and the pitch and stirring speed of the stirring screw are adjusted according to the required texture of the extruded wood materials.

2. The preparation process of an environment-friendly extruded wood material in the field of doors and windows according to claim 1, characterized in that: In step S1, the raw materials include wood powder, modified polymer materials, lubricants, stabilizers, foaming agents, inorganic color powders, resins, and food-grade oxidants, among which the mass of the wood powder is greater than 70% of the total mass of the overall raw materials.

3. The preparation process of an environment-friendly extruded wood material in the field of doors and windows according to claim 2, characterized in that: In step S2, the raw material pretreatment includes the softening treatment of the wood powder and the proportioning of the modified polymer materials, lubricants, stabilizers, foaming agents, inorganic color powders, resins, and food-grade epoxy agents. Among them, the inorganic color powder is selected according to the extruded wood materials to be formed, and the resin adopts at least one of phenolic resin and urea-formaldehyde resin.

4. The preparation process of an environment-friendly extruded wood material in the field of doors and windows according to claim 3, characterized in that: The wood powder softening treatment method adopts high-temperature steaming, microwave heating treatment, or soaking treatment with liquid medicine or alkali solution. Among them, the temperature of high-temperature steaming is not lower than 150 degrees, and the steaming time is not less than 3 hours.

5. The preparation process of an environment-friendly extruded wood material in the field of doors and windows according to claim 1, characterized in that: In step S6, the cutting and trimming include the trimming of the edges, corners, and burrs of the formed extrusion board, and also include the trimming of the shape of the extrusion board according to the dimensions of the door and window profiles.

6. The preparation process of an environment-friendly extruded wood material in the field of doors and windows according to claim 1, characterized in that: In step S7, the surface treatment method is to perform fine polishing through a grinding wheel.

7. The preparation process of an environment-friendly extruded wood material in the field of doors and windows according to claim 1, characterized in that: In step S8, the appearance inspection includes the inspection of the appearance quality, cracks, and color difference of the treated extrusion board.

8. The preparation process of an environmentally friendly extruded wood material in the field of doors and windows according to claim 1, characterized in that: In step S9, the performance inspection includes the data inspection of density, moisture content, surface Shore hardness, surface wear resistance, Vicat softening temperature, water absorption length elongation rate, flame retardancy, and harmful substance content.

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