Flat solid wood floor and its production process

Abstract

An embodiment of the present application discloses a pure flat solid wood floor and its production process, including a floor board body and a locking structure arranged on the peripheral sides of the floor board body. The locking structure includes a male tenon component and a female tenon component. The male tenon component is located on the side of the male tenon, and the female tenon component is located on the side of the female tenon. The surface of the floor board body is directly connected to both the side of the male tenon and the side of the female tenon. After assembly, the upper edges of the side of the male tenon and the side of the female tenon are abutted against each other. It has the advantages of being convenient for the cleaning and hygiene of the ground and also being beneficial to the integrity and beauty of the paving surface.

Description

Technical Field

[0001] The present application relates to the technical field of wooden floors, and in particular to a solid wood floor without chamfering and with a pure flat surface, and also to a production process of the solid wood floor with a pure flat surface. Background Art

[0002] Solid wood flooring is a wooden floor made of solid wood. The traditional product structure is a roughly rectangular floor block body with a tongue and groove or lock structure on the sides of the floor block body. The surface of the floor block body and the sides are connected by chamfers. The shape and size of the chamfers vary depending on the product. For example, solid wood floors designed as flat surfaces generally have a 45° bevel chamfer with a chamfer size of 0.8 to 1.5 mm; solid wood floors designed as antique surfaces generally have a circular chamfer with a chamfer size of 2 to 3 mm.

[0003] Due to the setting of the chamfer, there are still gaps between the floors even in the state of tight assembly, which increases the difficulty of cleaning the floor paved with solid wood floors; on the other hand, the assembly gaps between the floors are obvious, affecting the appearance of the paving. Summary of the invention

[0004] The first technical purpose of the present invention is to overcome the above technical problems, thereby providing a pure flat solid wood floor, which is convenient for cleaning and sanitation of the floor, and is also beneficial to the integrity and beauty of the paved surface. The second technical purpose of the present invention is to provide a production process for the pure flat solid wood floor.

[0005] To achieve the above-mentioned first technical purpose, the present invention provides a pure flat solid wood floor, including a floor block body and a locking structure arranged on the four sides of the floor block body, the locking structure including a male tenon component and a female tenon component, the male tenon component is located on the male tenon side, the female tenon component is located on the female tenon side, the surface of the floor block body is directly connected to the male tenon side and the female tenon side, and after assembly, the upper edge of the male tenon side is abutted against the upper edge of the female tenon side.

[0006] By means of the above structure, through the structural setting without chamfers, and the structural setting in which the upper edge of the male tenon side abuts against the upper edge of the female tenon side after assembly, it is possible to avoid gaps between the floors after assembly, which is beneficial to the cleanliness and hygiene of the floor, and also beneficial to the integrity and beauty of the paved surface.

[0007] Preferably, the male tenon component includes a male tenon part, a male tenon convex part provided on the bottom surface of the male tenon part, and a male tenon root vertical surface. The female tenon component includes a female tenon part that is tenon-fitted with the male tenon part, a female tenon concave part provided on the upper surface of the female tenon part and used to accommodate the male tenon convex part, and a female tenon end vertical surface. There is an acute angle of 54-56° between the locking surface of the male tenon convex part and the longitudinal section of the floorboard body. After tenon fitting, the locking surface and the locking surface of the female tenon concave part are in surface contact fit.

[0008] Preferably, both the male tenon side surface and the female tenon side surface have a right angle of 90° with the surface.

[0009] Preferably, there is an obtuse angle of 97-103° between the female tenon side surface and the surface. After assembly, the male tenon side surface and the female tenon side surface are in surface contact fit.

[0010] Preferably, there is an obtuse angle of 97-103° between the female tenon side surface and the surface. After assembly, there is an acute angle of 1-3° between the male tenon side surface and the female tenon side surface.

[0011] Preferably, after the male tenon side surface and the female tenon side surface are fitted, there is an expansion gap of 0.05-0.2 mm between the male tenon component and the female tenon component.

[0012] Preferably, a balance groove is provided between the male tenon side surface and the male tenon part, and the balance groove runs through the length direction of the floorboard body.

[0013] Preferably, the depth of the balance groove is 5-10 mm, and the width is 0.2-0.3 mm.

[0014] Preferably, both between the male tenon root vertical surface and the bottom surface of the floorboard body, and between the female tenon end vertical surface and the bottom surface of the floorboard body, are connected by a bottom chamfer for transition.

[0015] Preferably, the bottom chamfer has an acute angle of 45° with the horizontal plane, and the height of the bottom chamfer is 1-2.5 mm.

[0016] A flat solid wood floor according to the present invention, through the structural setting without chamfering and the structural setting that the upper edge of the male tenon side abuts against the upper edge of the female tenon side after assembly, can avoid gaps between the floors after assembly, which is beneficial to the cleaning and hygiene of the ground and also beneficial to the integrity and beauty of the paving surface. Further, by setting an acute angle of 54-56° between the locking surface of the male tenon convex part and the longitudinal section of the floorboard body, and the structural setting that the locking surface and the locking surface are in surface contact fit after tenon fitting, the self-locking of the locking surface and the locking surface is utilized to improve the tension of the tenon fitting between the male tenon component and the female tenon component, and effectively avoid the influence of the dimensional change of the floorboard body on the abutting relationship between the upper edge of the male tenon side and the upper edge of the female tenon side. Furthermore, through the setting of the balance groove, cutting is formed to a certain extent between the male tenon side and the male tenon part, so that the comprehensive single board of the solid wood material in the thickness area of the floorboard body where the male tenon side is located follows the shrinkage and swelling law of the solid wood material, that is, the shrinkage and swelling rate of the solid wood material in the thickness area of the floorboard body where the male tenon side is located is reduced.

[0017] To achieve the above second technical objective, the present invention provides a production method of a flat solid wood floor, including the steps of machining, and the machining steps sequentially include four-side planing process, primer process, locking processing process, topcoat process, and edge sealing process.

[0018] By means of the above method, through the steps of first painting (only painting the primer first or painting completely) and then locking processing, the frame effect formed by painting paint on the surface of the flat solid wood floor is more effectively avoided.

[0019] Preferably, the production method of the flat solid wood floor further includes a wax injection step before the machining step, and is characterized in that the wax injection step sequentially includes a rapid drying stage, an intermediate drying stage, and a wax injection stage;

[0020] In the rapid drying stage, the treated material with an initial moisture content of 60-65% is placed in a wax solution at 75-80°C until the moisture content of the treated material drops to 30-35%.

[0021] In the intermediate drying stage, the temperature of the wax solution is raised to 85-90°C and kept warm until the moisture content of the treated material drops to 15-20%.

[0022] Preferably, in the rapid drying stage, the treatment time of the treated material in the wax solution at 75-80°C is 16-26h.

[0023] Preferably, in the intermediate drying stage, the wax liquid is heated to 85-90°C at a heating rate of 2.8-3.2°C / h, and the treated material is treated in the wax liquid at 85-90°C for 12-18 hours.

[0024] Preferably, the treated material is placed vertically in the wax liquid, and its length direction is horizontal to the liquid surface of the wax liquid.

[0025] Preferably, adjacent layers of treated materials are separated by "H"-shaped spacers.

[0026] Preferably, in the wax injection stage, the treated material is treated in wax liquid at 100-110° C. for 2-16 hours with a vacuum degree of 0.06-0.07 MPa.

[0027] Preferably, during the wax injection stage, cold water is continuously passed into the top of the wax injection container.

[0028] Preferably, an oscillation drying stage is provided between the intermediate drying stage and the wax injection stage. In the oscillation drying stage, the wax liquid is heated to 100-110°C at a heating rate of 1.5-2.0°C / h, and during the heating process, heating is stopped for 10-20 minutes every 1-1.5 hours.

[0029] Preferably, during the temperature rising process in the shaking drying stage, heating is stopped 2 to 4 times.

[0030] Preferably, during the shaking and drying stage, cold water is continuously introduced into the top of the wax injection container.

[0031] According to a method for producing a pure flat solid wood floor of the present invention, the method comprises the steps of first painting (primer only or full painting) and then locking, thereby effectively avoiding the frame effect formed by applying paint on the surface of the pure flat solid wood floor. Furthermore, in the rapid drying stage, the treated material with a relatively high initial moisture content is placed in the wax liquid. At this time, in the wax liquid with a relatively high temperature, the moisture in the treated material is quickly and massively discharged, so that the difference between the speed of moisture migration and discharge in the treated material and the speed of dissolution and replacement of moisture in the wax liquid can be used to form a certain degree of sealing effect on the surface of the treated material, so as to achieve the effect of wood explosion, increase the replacement channel between the moisture inside the treated material and the wax liquid, and improve the impregnation rate of the wax liquid, so as to ensure that the pure flat solid wood floor impregnated with the wax liquid hardly shrinks or swells during use. Furthermore, by stopping heating (oscillation drying) 2 to 4 times during the oscillation drying stage, a temperature gradient of high inside and low outside and a moisture content gradient of high outside and low inside are repeatedly formed inside the treated material, thereby more effectively promoting the replacement of water and wax, that is, the discharge of water and the impregnation of wax liquid.

[0032] In summary, the flat solid wood floor provided by the present invention application can avoid gaps between the floors after assembly, which is beneficial to the cleaning and hygiene of the ground and improves the integrity and aesthetics of the paving surface. At the same time, the production method of the flat solid wood floor provided by the present invention application can improve the impregnation rate of the wax liquid, overcome the characteristics of the shrinkage and swelling of the solid wood material, and ensure that the flat solid wood floor after wax impregnation hardly undergoes dimensional changes and deformation during use. Therefore, the solid wood floor does not need to be provided with a chamfer structure and can also achieve the effect of seamless and non-arching. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1 It is a schematic structural diagram of the male tenon component in Embodiment 1 of the present invention;

[0035] Figure 2 It is a schematic structural diagram of the female tenon component in Embodiment 1 of the present invention;

[0036] Figure 3 It is a schematic structural diagram of the assembled male tenon component and female tenon component in Embodiment 1 of the present invention;

[0037] Figure 4 It is a schematic structural diagram of the male tenon component in Embodiment 2 of the present invention;

[0038] Figure 5 It is a schematic structural diagram of the female tenon component in Embodiment 2 of the present invention;

[0039] Figure 6 It is a schematic structural diagram of the assembled male tenon component and female tenon component in Embodiment 3 of the present invention;

[0040] Figure 7 It is Figure 6 A partial enlarged view of part A in

[0041] Figure 8 It is a schematic structural diagram of the assembled male tenon component and female tenon component in Embodiment 4 of the present invention;

[0042] Figure 9 It is Figure 8 A partial enlarged view of part B in

[0043] Figure 10 It is a schematic diagram of the stack of the treated materials in Embodiment 7;

[0044] Figure 11 It is a schematic diagram of the placement method of the material to be processed in Example 7 in the wax injection container;

[0045] Figure 12 It is a schematic cross-sectional structure diagram of the spacer in Example 7;

[0046] Reference numerals in the above drawings: 100 - floorboard body, 110 - surface, 120 - male tenon side, 130 - female tenon side, 140 - bottom chamfer, 200 - locking structure, 201 - male tenon part, 202 - male tenon protrusion, 203 - male tenon root vertical surface, 204 - female tenon part, 205 - female tenon concave part, 206 - female tenon end vertical surface, 207 - locking surface, 208 - locking surface, 300 - balance groove, 400 - material to be processed, 500 - spacer. Detailed implementation manners

[0047] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without making creative efforts shall fall within the protection scope of this application.

[0048] Example 1: Refer to Figure 1 、 Figure 2 A pure flat solid wood floor shown, including a floorboard body 100 and a locking structure 200 arranged on the four sides of the floorboard body 100. The locking structure 200 includes a male tenon component and a female tenon component formed by milling. When the floorboard body 100 is rectangular, the male tenon component includes a long-side male tenon arranged on the long side of the floorboard body 100 and a short-side male tenon arranged on the short side of the floorboard body 100, and the long-side male tenon and the short-side male tenon are respectively located on the two male tenon sides 120 of the floorboard body 100; the female tenon component includes a long-side female tenon arranged on the long side of the floorboard body 100 and a short-side female tenon arranged on the short side of the floorboard body 100, and the long-side female tenon and the short-side female tenon are respectively located on the two female tenon sides 130 of the floorboard body 100; the two male tenon sides 120 and the two female tenon sides 130 form the four sides of the floorboard body 100. In this embodiment, the surface 110 of the floorboard body 100 is directly connected to the two male tenon sides 120 and the two female tenon sides 130, and all have a 90° right angle with the surface 110; after assembly, the upper edges of the male tenon side 120 and the female tenon side 130 are abutted against each other, that is, the male tenon side 120 and the female tenon side 130 are in surface contact.

[0049] With the above structure, through the structure setting without chamfers and the structure setting where the upper edge of the male tenon side surface 120 abuts against the upper edge of the female tenon side surface 130 after assembly, it is possible to avoid gaps between the floors after assembly, which is beneficial to the cleanliness and hygiene of the ground and also beneficial to the integrity and aesthetics of the paving surface.

[0050] Furthermore, the male tenon component includes a male tenon part 201, a male tenon convex part 202 provided on the lower bottom surface of the male tenon part 201, and a male tenon root vertical surface 203. Generally, the male tenon root vertical surface 203 converges inward, so that the protruding length of the male tenon part 201 on its lower bottom surface is greater than the protruding length on its upper surface. There is an acute angle α of 54 - 56° (such as 55°) between the locking surface 207 of the male tenon convex part 202 and the longitudinal section of the floorboard body 100. The female tenon component includes a female tenon part 204 that is tenon-fitted with the male tenon part 201, a female tenon concave part 205 provided on the upper surface of the female tenon part 204 and used to accommodate the male tenon convex part 202, and a female tenon end vertical surface 206. After tenon-fitting, the locking surface 207 and the locking surface 208 of the female tenon concave part 205 are in surface contact fit, and the lateral locking of the male tenon component and the female tenon component is achieved through the surface contact fit of the locking surface 207 and the locking surface 208. Thus, by setting the inclination angle of the locking surface 207 to 54 - 56° and making the locking surface 207 and the locking surface 208 in surface contact fit after tenon-fitting, a self-locking is formed between the locking surface and the locking surface after tenon-fitting. By using the self-locking of the locking surface 207 and the locking surface 208, the tension of the tenon-fitting between the male tenon component and the female tenon component can be increased, thus effectively avoiding the influence of the dimensional change of the floorboard body 100 on the abutting relationship between the upper edge of the male tenon side surface 120 and the upper edge of the female tenon side surface 130. For example, when the floorboard body 100 undergoes dimensional shrinkage in a geothermal environment, by using the self-locking of the locking surface 207 and the locking surface 208, it is possible to effectively avoid the formation of a large expansion gap between the male tenon side surface 120 and the female tenon side surface 130 due to the unlocking of the lock caused by the shrinkage tension.

[0051] In order to reserve a relatively ample expansion gap between two adjacent floorboard bodies 100 after assembly, refer to Figure 3As shown, after the male tenon side surface 120 is fitted with the female tenon side surface 130, there is an expansion gap of 0.05 - 0.2 mm between the male tenon component and the female tenon component. Specifically, there is an expansion gap l1 of 0.05 - 0.2 mm (such as 0.1 mm) between the front end face of the male tenon part 201 and the tenon bottom face of the female tenon part 204, and there is an expansion gap l2 of 0.05 - 0.2 mm (such as 0.1 mm) between the male tenon root vertical face 203 and the female tenon end vertical face 206. Those of ordinary skill in the art can understand that the expansion gap values of l1 and l2 can be the same or different. At the same time, both between the male tenon root vertical face 203 and the bottom face of the floorboard body 100, and between the female tenon end vertical face 206 and the bottom face of the floorboard body 100, are transitionally connected through the bottom chamfer 140. The bottom chamfer 140 has an acute angle of 45° with the horizontal plane, and the height h of the bottom chamfer 140 is 1 - 2.5 mm (such as 2.0 mm).

[0052] Example 2: The difference between Example 2 and Example 1 is that, referring to Figure 4 、 Figure 5 As shown, there is an obtuse angle β1 of 97 - 103° between the female tenon side surface 130 and the surface 110. After assembly, the male tenon side surface 120 and the female tenon side surface 130 are in surface contact fit. For example, there is an obtuse angle β1 of 100° between the female tenon side surface 130 and the surface 110, and there is an acute angle β2 of 80° between the male tenon side surface 120 and the surface 110. Through the angle settings of β1 and β2, when the shrinkage amount of the floorboard body 100 is too large, the gap between the male tenon side surface 120 and the female tenon side surface 130 can be visually eliminated to a certain extent through the surface fit of the inclined planes between them. And, as is well known to those of ordinary skill in the art, in order to enable the male tenon component to be smoothly assembled into the female tenon component, the upper top surface of the female tenon part 204 is inclined. When there is an obtuse angle β1 of 97 - 103° between the female tenon side surface 130 and the surface 110, the female tenon side surface 130 and the upper top surface of the female tenon part 204 can be made to be at an angle close to perpendicular, thereby improving the structural strength of the part formed by the surface 110, the female tenon side surface 130, and the upper top surface of the female tenon part 204.

[0053] Example 3: The difference between Example 3 and Example 1 is that, referring to Figure 6 、 Figure 7As shown, there is an obtuse angle β3 of 97 to 103° between the side surface 130 of the female tenon and the surface 110. After assembly, an acute angle γ of 1 to 3° is formed between the side surface 120 of the male tenon and the side surface 130 of the female tenon. For example, there is an obtuse angle β3 of 98° between the side surface 130 of the female tenon and the surface 110, and an acute angle β4 of 80° between the side surface 120 of the male tenon and the surface 110. Thus, after assembly, the upper edges of the side surface 120 of the male tenon and the side surface 130 of the female tenon are in abutting contact with each other, and an acute angle γ of 2° is formed between the side surface 120 of the male tenon and the side surface 130 of the female tenon. Therefore, compared with the technical solution of Embodiment 2, the installation noise caused by the surface contact between the side surface 120 of the male tenon and the side surface 130 of the female tenon can be more effectively avoided.

[0054] Embodiment 4: The difference between Embodiment 4 and Embodiments 1-3 is that, referring to Figure 8 , Figure 9 As shown, a balance groove 300 is provided between the side surface 120 of the male tenon and the tenon portion 201 of the male tenon, and the balance groove 300 is arranged through the length direction of the floorboard body 100. The depth of the balance groove 300 is 5 to 10 mm, and the width of the opening is 0.2 to 0.3 mm. Through the arrangement of the balance groove 300, a cut is formed to a certain extent between the side surface 120 of the male tenon and the tenon portion 201 of the male tenon, so that the comprehensive single board of the solid wood material in the thickness area of the floorboard body 100 where the side surface 120 is located conforms to the dry shrinkage and wet expansion change law of the solid wood material, that is, the dry shrinkage and wet expansion rate of the solid wood material in the thickness area of the floorboard body where the side surface 120 is located is reduced.

[0055] Embodiment 5: The pure flat solid wood floor of Embodiments 1-4 is produced and manufactured through the following machining steps:

[0056] Step S1, four-side planing process: The upper and lower surfaces and both side surfaces of the blank used for making the pure flat solid wood floor are planed smooth by a four-side planer.

[0057] Step S2, primer process: The selected front surface is sanded, and multiple (for example, 6-8) coats of primer paint are applied.

[0058] Step S3, locking groove processing process: The locking groove structure 200 is made on the four peripheral sides of the intermediate material after the primer coating is completed.

[0059] Step S4, topcoat process: On top of the applied primer, multiple (for example, 2-4) coats of topcoat paint are applied.

[0060] Step S5, edge sealing process: Edge sealing paint or liquefied wax is applied on the four peripheral sides of the locking groove structure 200.

[0061] Embodiment 6: The pure flat solid wood floor of Embodiments 1-4 can also be produced and manufactured through the following machining steps:

[0062] Step S1, four-side planing process: plane the upper surface, lower surface, and two side surfaces of the blank used for making the solid wood floor with a pure flat surface by a four-side planer.

[0063] Step S2, primer and topcoat process: sand the selected front surface, and apply multiple coats (such as 6 - 8 coats) of primer paint and multiple coats (such as 2 - 4 coats) of topcoat paint.

[0064] Step S3, locking groove processing process: make a locking groove structure 200 on the four peripheral sides of the intermediate material after the primer is applied.

[0065] Step S4, edge sealing process: apply edge sealing paint or liquefied wax on the four peripheral sides of the locking groove structure 200.

[0066] In Examples 5 and 6, by the steps of first painting (only painting the primer first or painting completely) and then locking groove processing, the picture frame effect formed by painting paint on the surface of the solid wood floor with a pure flat surface is more effectively avoided.

[0067] Example 7: Before performing the machining steps as in Examples 5 and 6, the blank used for making the solid wood floor with a pure flat surface can also be waxed. Among them, the waxing step includes the following stages in sequence:

[0068] Stage S1, rapid drying stage: place the treated material with an initial moisture content of 60 - 65% in a wax solution at 75 - 80°C for 16 - 26 h until the moisture content of the treated material drops to 30 - 35%.

[0069] Stage S2, intermediate drying stage: raise the temperature of the wax solution at a heating rate of 2.8 - 3.2°C / h to 85 - 90°C, and keep it at the set temperature for 12 - 18 h until the moisture content of the treated material drops to 15 - 20%.

[0070] Stage S3, wax injection stage: place the treated material in a wax solution at 100 - 110°C for 2 - 16 h, set the vacuum degree in the wax injection container to 0.06 - 0.07 MPa, and continuously pass cold water into the top of the wax injection container throughout the wax injection stage.

[0071] In this embodiment, before Stage S1, refer to Figure 10As shown, the treated materials 400 are stacked layer by layer, and adjacent layers of treated materials 400 are separated by partition bars 500. The interval between adjacent partition bars 500 is 30 to 40 cm, and the first and last partition bars 500 are respectively located at the beginning and the end of the length direction of the treated materials 300. After the stacked treated materials are fastened in three directions (any stacking frame in the prior art can be used to fasten the upper and lower surfaces of the material stack and one side), they are flipped 90 degrees and hoisted into the wax injection container. Thus, refer to Figure 11 As shown, the length direction of the treated material 400 is horizontal to the length direction of the wax injection container, that is, the length direction of the treated material 400 is horizontal to the liquid surface of the wax liquid, and is placed vertically in the wax liquid. Figure 12 As shown, the cross section of the spacer bar 500 is "H" shaped.

[0072] In this embodiment, the continuous flow of cold water into the top of the wax injection container is achieved by installing a cold water pipe on the top of the wax injection container. The cold water pipe can be connected to a cold water source or to the water outlet of a heat pump. That is, the water vapor discharged from the drying of the treated material in the wax injection container passes through the heat pump, and its heat is recovered by the heat pump and used for heating the equipment, and is condensed into condensed water, which is then passed into the cold water pipe.

[0073] In this embodiment, by placing the treated material 400 with a relatively high initial moisture content in a high-temperature wax liquid during the rapid drying stage, the moisture in the treated material 400 is quickly and massively discharged in the relatively high-temperature wax liquid, so that the difference between the speed of moisture migration and discharge in the treated material 400 and the speed of dissolving and replacing moisture in the wax liquid can be used to form a certain degree of sealing effect on the surface of the treated material 400, so as to achieve the effect of wood blasting, increase the replacement channel of moisture and wax liquid inside the treated material 400, and improve the impregnation rate and impregnation depth of the wax liquid, so as to ensure that the pure flat solid wood floor after wax liquid impregnation will hardly shrink or swell during use. At the same time, by increasing the replacement channel of moisture and wax liquid inside the treated material 400, the processing temperature and processing time of the S3 stage (wax injection stage) can be more effectively reduced, so as to avoid excessive carbonization of the treated material caused by excessive wax injection processing temperature and excessive wax injection processing time, thereby affecting its material color.

[0074] Embodiment 8: Before the machining steps of Embodiments 5 and 6 are performed, the blank for making a pure flat solid wood floor may be waxed. The waxing step includes the following stages in sequence:

[0075] The S1 stage, the rapid drying stage, is to place the treated material with an initial moisture content of 60-65% in a wax solution at 75-80°C for 16-26 hours until the moisture content of the treated material drops to 30-35%;

[0076] In the S2 stage, the intermediate drying stage, the wax liquid is heated to 85 - 90°C at a heating rate of 2.8 - 3.2°C / h, and after reaching the set temperature, it is kept warm for 12 - 18 h until the moisture content of the wood material to be treated drops to 15 - 20%.

[0077] In the S3 stage, the oscillating drying stage, the wax liquid is heated to 100 - 110°C at a heating rate of 1.5 - 2.0°C / h. During the heating process, the heating is stopped for 10 - 20 min every 1 - 1.5 h (in this embodiment, the heating is stopped for 15 min every 1.5 h), and the heating is stopped 2 - 4 times in total (in this embodiment, the heating is stopped 3 times in total). And throughout the oscillating drying stage, cold water is continuously introduced into the top of the wax injection container.

[0078] In the S4 stage, the wax injection stage, the wood material to be treated is processed in the wax liquid at 100 - 110°C for 2 - 16 h, the vacuum degree in the wax injection container is set to 0.06 - 0.07 MPa, and throughout the wax injection stage, cold water is continuously introduced into the top of the wax injection container.

[0079] In this embodiment, by stopping heating (oscillating drying) 2 - 4 times in the oscillating drying stage, a temperature gradient with a high inside and a low outside and a moisture content gradient with a high outside and a low inside are repeatedly formed inside the wood material 400, so as to be able to more effectively promote the replacement of water and wax, that is, the discharge of moisture and the impregnation of wax liquid, and improve the impregnation rate and impregnation depth of the wax liquid. At the same time, it can more effectively reduce the treatment temperature and treatment time in the S4 stage (wax injection stage), thereby avoiding excessive carbonization of the wood material to be treated caused by too high a wax injection treatment temperature and too long a wax injection treatment time, which affects its wood color. And the pure flat solid wood floor blank prepared by the wax injection method of this embodiment has a relatively high final moisture content, so it can relatively well adapt to the regional environment with a large humidity span throughout the year.

[0080] The process and performance parameters of the pure flat solid wood floor blank prepared by using the wax injection method of Example 7 are shown in Table 1, the process and performance parameters of the pure flat solid wood floor blank prepared by using the wax injection method of Example 8 are shown in Table 2, and the process and performance parameters of the pure flat solid wood floor blank prepared by using the wax injection method of the prior art are shown in Table 3.

[0081] The solid wood floor blanks with a pure flat surface prepared by using the wax injection method of Examples 7 and 8, and the solid wood floors with a pure flat surface prepared according to the structures of Examples 1 to 4 were balanced in an environment of 30°C / 90% RH for 1 week. The gap values formed between the male tenon side 120 and the female tenon side 130 are shown in Table 4. Among them, the control group is the solid wood floor blanks with a pure flat surface prepared by using the wax injection method of Examples 7 and 8, and the gap values formed between the male tenon side 120 and the female tenon side 130 after the solid wood floors prepared according to the locking structure of the prior art were balanced in an environment of 30°C / 90% RH for 1 week.

[0082] Table 1. Process and performance parameters of solid wood floor blanks with a pure flat surface (Example 7)

[0083]

[0084] Table 2. Process and performance parameters of solid wood floor blanks with a pure flat surface (Example 8)

[0085]

[0086] Table 3. Process and performance parameters of solid wood floor blanks with a pure flat surface (prior art)

[0087] Tree species Processing temperature during wax injection stage / °C Processing time during wax injection stage / h Wax injection depth / mm Final moisture content / % Pometia pinnata 110～120 8～10 2 mm 2～3 Oak 110～120 8～10 1.7 mm 2～3 Sub - rosewood 125～130 24～28 1.5 mm 2～3 Spatholobus 125～130 24～28 1.5 mm 2～3

[0088] Table 4. Gap values of solid wood floors with a pure flat surface after environmental balance (30°C / 90% RH environment, tree species: oak)

[0089]

[0090] The above description is for illustrative purposes and not for limitation. By reading the above description, many embodiments and many applications other than the provided examples will be obvious to those skilled in the art. Therefore, the scope of this teaching should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of the equivalents of these claims. For the sake of comprehensiveness, all articles and references including patent applications and publications are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to abandon such subject matter, nor should it be considered that the applicant has not considered such subject matter as part of the disclosed subject matter of the application.

Claims

1. A production method of a pure flat solid wood floor, including the step of machining, characterized in that, The steps of the machining process sequentially include the four-side planing process, the primer process, the lock processing process, the topcoat process, and the edge sealing process; or sequentially include the four-side planing process, the primer and topcoat processes, the lock processing process, and the edge sealing process. It further includes a wax injection step before the steps of the machining process. In the wax injection step, it sequentially includes a rapid drying stage, an intermediate drying stage, and a wax injection stage. In the rapid drying stage, the processed material with an initial moisture content of 60-65% is placed in a wax solution at 75-80°C until the moisture content of the processed material drops to 30-35%. In the intermediate drying stage, the wax solution is heated to 85-90°C and kept warm until the moisture content of the processed material drops to 15-20%. In the wax injection stage, the processed material is treated in a wax solution at 100-110°C for 2-16 h, and the vacuum degree is 0.06-0.07 MPa. In the wax injection stage, cold water is continuously introduced into the top of the wax injection container. The solid wood floor with a pure flat surface includes a floorboard body (100) and a lock structure (200) arranged on the peripheral sides of the floorboard body (100). The lock structure (200) includes a male tenon component and a female tenon component. The male tenon component is located on the male tenon side (120), and the female tenon component is located on the female tenon side (130). The surface (110) of the floorboard body (100) is directly connected to both the male tenon side (120) and the female tenon side (130). After assembly, the upper edges of the male tenon side (120) and the female tenon side (130) are in contact with each other. The male tenon component includes a male tenon part (201), a male tenon convex part (202) arranged on the lower bottom surface of the male tenon part (201), and a male tenon root vertical surface (203). The female tenon component includes a female tenon part (204) that is tenon-fitted with the male tenon part (201), a female tenon concave part (205) arranged on the upper surface of the female tenon part (204) and used to accommodate the male tenon convex part (202), and a female tenon end vertical surface (206). There is an acute angle of 54-56° between the locking surface (207) of the male tenon convex part (202) and the longitudinal section of the floorboard body (100). After tenon fitting, the locking surface (207) and the locking surface (208) of the female tenon concave part (205) are in surface contact fit. There is an obtuse angle β1 of 97-103° between the female tenon side (130) and the surface (110). After assembly, the male tenon side (120) and the female tenon side (130) are in surface contact fit.

2. The production method of the flat solid wood floor according to claim 1, characterized in that, A balance groove (300) is provided between the male tenon side (120) and the male tenon part (201), and the balance groove (300) runs through the length direction of the floorboard body (100).

3. The production method of the flat solid wood floor according to claim 1, characterized in that, In the rapid drying stage, the processing time of the processed material in the wax solution at 75-80°C is 16-26 h.

4. The production method of the flat solid wood floor according to claim 1, characterized in that, In the intermediate drying stage, the wax solution is heated to 85-90°C at a heating rate of 2.8-3.2°C / h, and the processing time of the processed material in the wax solution at 85-90°C is 12-18 h.

5. The production method of the flat solid wood floor according to claim 1, characterized in that An oscillating drying stage is also provided between the intermediate drying stage and the wax injection stage. In the oscillating drying stage, the wax liquid is heated to 100-110 °C at a heating rate of 1.5-2.0 °C / h, and during the heating process, heating is stopped for 10-20 minutes every 1-1.5 hours.

6. The production method of the flat solid wood floor according to claim 5, characterized in that During the heating process of the oscillating drying stage, heating is stopped 2-4 times in total.

7. The production method of the flat solid wood floor according to claim 5, characterized in that, During the oscillating drying stage, cold water is continuously introduced into the top of the wax injection container.

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