Processing technology and connecting method of plastic-wood floor with mortise and tenon structure

Abstract

The application belongs to the technical field of plastic-wood floor, and particularly relates to a plastic-wood floor processing technology with mortise-tenon structure and a connecting method thereof. The specific steps of the plastic-wood floor processing technology are as follows: raw material preparation, composite co-extrusion forming, first cutting, cooling, second cutting, quality inspection and warehousing. The step-by-step process of forming first, then shaping and finally precisely processing the mortise-tenon structure is adopted to complete the standardized mortise-tenon prefabricated assembly structure before delivery, thereby replacing the traditional structureless light plate floor. The stress release cooling process is used to ensure the size and height stability of the plate, so that the manual reserved expansion joint is not needed for assembly, the industry defects of different manual joint sizes, great assembly difficulty and poor paving appearance are completely solved, and the mortise-tenon engagement is used to improve the overall performance and structural stability of the floor paving.

Description

Technical Field

[0001] This invention relates to the field of wood-plastic composite flooring technology, specifically to a processing technology and connection method for wood-plastic composite flooring with mortise and tenon joints. Background Technology

[0002] Wood-plastic composite (WPC) flooring is a composite material flooring made from a mixture of wood powder and plastic. Its biggest advantages are that it is waterproof, moisture-proof, and maintenance-free, making it especially suitable for use in damp environments such as outdoor terraces and courtyards. However, the existing processing technology for wood-plastic composite flooring still has the following technical problems: Currently, during the processing and production of WPC (wood-plastic composite) flooring, no tenon and mortise structures are pre-reserved on its side walls. As a result, installers need to leave expansion joints when assembling WPC flooring. However, the size of the expansion joints varies each time, leading to poor aesthetics after assembly and making the process more difficult.

[0003] Therefore, a processing technology and connection method for wood-plastic composite flooring with mortise and tenon joints is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The purpose of this invention is to provide a processing technology and connection method for wood-plastic composite flooring with mortise and tenon structure, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a processing method for wood-plastic composite flooring with a tenon and mortise structure, the specific steps of which are as follows: Step 1: Raw material preparation: Select 30%-50% PE, 40%-60% wood flour, and 4.5%-13% additives, and mix the above three raw materials evenly using a mixing device for later use; Step 2, Composite Co-extrusion Molding: The raw material is extruded using extrusion molding equipment, and the surface of the extruded wood-plastic flooring is embossed using embossing equipment; Step 3, First Cut: The extruded wood-plastic flooring is conveyed into the cutting equipment by a roller-type traction device, and the wood-plastic flooring is initially cut to the required length according to the customer's needs; Step 4: Cooling: Place the pre-cut WPC flooring on a cooling rack to cool naturally for 8-10 hours; Step 5, Secondary Cutting: Place the cooled wood-plastic flooring inside the cutting equipment and cut it precisely to the required length according to the order size. Then, use a tenon and mortise joint machine to process the ends of the wood-plastic flooring. Step Six: Quality Inspection and Warehousing: Quality inspectors conduct quality inspections on the processed WPC flooring. WPC flooring that passes the inspection is packaged and stored in the warehouse.

[0006] Preferably, in step one, the additives include lubricants, coupling agents, antioxidants, UV stabilizers, toughening agents, and mildew inhibitors; the wood flour is selected from 80-120 mesh dried poplar or pine wood flour, and the moisture content is controlled to be ≤3%.

[0007] Preferably, in step one, the raw material mixing step is as follows: Hot mixing stage: Pour the raw materials into the inside of the mixing equipment, control the stirring speed at 600-800 r / min, raise the temperature to 95-115℃, and stir at a constant temperature for 8-12 minutes to achieve wood powder activation, uniform coating of additives, and dehumidification of materials. Cold mixing stage: The mixing equipment is cooled to below 40℃, the stirring speed is controlled at 200-300 r / min, and the mixing is carried out for 5-8 minutes; the material is uniformly plasticized and mixed, and agglomerated particles are eliminated to obtain a homogeneous composite mixture. It is then sealed and allowed to stand for 20-30 minutes for later use.

[0008] Preferably, in step two, the extrusion molding equipment includes a feeding section, a melting section, a plasticizing and homogenizing section, and a die forming section; the temperature of the feeding section is set to 155-165℃, the temperature of the melting section is set to 170-180℃, the temperature of the plasticizing and homogenizing section is set to 180-190℃, and the temperature of the die forming section is set to 185-195℃; the rotation speed of the extrusion molding equipment is controlled at 180-240 r / min, and the slab is extruded continuously at a uniform speed. The embossing roller temperature of the embossing equipment is 55-65℃, and the embossing pressure is 0.3-0.5MPa.

[0009] Preferably, in step three, the traction speed of the roller traction device is 3-6 m / min.

[0010] Preferably, in step four, the wood-plastic composite flooring needs to be stacked in single layers with staggered joints, with ventilation gaps between layers, and the temperature of the stacking workshop is controlled at 22-28℃.

[0011] Preferably, in step six, the quality inspection includes appearance texture, flatness, straightness, dimensional tolerance, mortise and tenon fit accuracy, surface hardness, and presence of chipped edges or cracks.

[0012] A method for connecting wood-plastic composite flooring with a mortise and tenon structure, the specific steps of which are as follows: Step 1: Pre-treatment of the base surface: Clean the surface of the ground base support joists to remove debris and dust, ensuring that the support surface is flat and free of protrusions. Fix the joists according to the preset spacing to serve as the support base for laying the WPC flooring; prepare several WPC flooring panels. Step 2, Positioning and placing the boards: Take out the first piece of wood-plastic composite flooring, place it stably on the joists, adjust its position to ensure that the board is placed straight, and complete the initial positioning; Step 3, Mortise and Tenon Pre-Joint Operation: Take the second piece of WPC flooring, align the groove at the end of the second piece of WPC flooring with the splicing connecting block at the end of the first piece of WPC flooring, and push the second piece of WPC flooring horizontally so that the splicing connecting block slides into the groove to achieve a snap-fit. After the snap-fit ​​is completed, a splicing gap is reserved between the first and second pieces of WPC flooring. Step 4, Continuous installation cycle: Repeat step 3 to continuously assemble the subsequent WPC flooring, and complete the tenon and mortise joints and sealing component assembly of adjacent boards in sequence, gradually completing the WPC flooring installation in the entire area; Step 5, Overall Calibration: After all boards are spliced, check all splicing positions and gap dimensions, make minor adjustments and corrections to misaligned or offset boards, and complete the overall connection and installation of the wood-plastic flooring.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention employs a step-by-step process of first forming, then finalizing, and finally uniformly and precisely machining the mortise and tenon structure. This process completes the standardized mortise and tenon prefabrication assembly structure before leaving the factory, replacing the traditional unstructured bare board flooring. Combined with a stress-relieving cooling process, it ensures the high stability of the board dimensions, eliminating the need for manual expansion joints during assembly. This completely solves the industry defects of inconsistent manual gap sizes, high assembly difficulty, and poor installation aesthetics. At the same time, the mortise and tenon interlocking enhances the overall integrity and structural stability of the flooring installation. Attached Figure Description

[0014] Figure 1 This is a flowchart of the processing steps for this wood-plastic composite flooring; Figure 2 A flowchart illustrating the steps involved in connecting wood-plastic composite (WPC) flooring. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Example:

[0017] Please see Figure 1-2 The present invention provides a technical solution: A processing method for wood-plastic composite flooring with a tenon and mortise structure, the specific steps of which are as follows: Step 1: Raw material preparation: Select 30%-50% PE, 40%-60% wood flour, and 4.5%-13% additives, and mix the above three raw materials evenly using a mixing device for later use; determine the basic components of the wood-plastic composite substrate. PE serves as the matrix resin, providing toughness and waterproof performance; wood flour reduces costs and imparts a wood-like texture; additives compensate for the compatibility defects of the wood-plastic two-phase system. Preliminary mixing achieves pre-dispersion of each component, providing a qualified mixed source for subsequent extrusion molding; Step 2, Composite Co-extrusion Molding: The raw materials are extruded using extrusion molding equipment, and the surface of the extruded wood-plastic flooring is embossed using embossing equipment; PE and wood powder are melted and compounded, and continuous extrusion is used to obtain a dense and integral wood-plastic flooring blank, ensuring the basic strength and deformation resistance of the board; after the board is formed, simulated wood grain texture is directly processed on the surface to enhance the product's appearance and decoration effect and simulate the feel of real wood; Step 3, Primary Cutting: The extruded wood-plastic flooring is conveyed to the cutting equipment via a roller-type traction device. The wood-plastic flooring is initially cut to the required length according to the customer's needs. The roller traction ensures continuous and stable conveying of the extruded board, avoiding stretching, twisting and deformation of the board. The primary cutting is a rough cut, without directly processing the finished size, leaving a processing allowance for subsequent fine processing, compensating for dimensional fluctuations caused by extrusion and cooling, and preventing insufficient size after subsequent tenoning and precision cutting. Step 4: Cooling: Stack the pre-cut WPC wood flooring on a cooling rack to cool naturally for 8-10 hours. The extruded board contains a lot of internal thermal stress. If it is directly processed, it will warp, bend, shrink and deform later. Long-term natural cooling allows the board to slowly release internal stress, and the board size tends to be stable, ensuring the accuracy of subsequent secondary cutting and tenon and mortise processing. Step 5, Secondary Cutting: The cooled WPC flooring is placed inside the cutting equipment, and its length is precisely cut according to the order size requirements. The ends of the WPC flooring are then processed with tenon and mortise structures using a mortise and tenon machine. After stress release, a fixed-length precision cut is performed to ensure the accuracy of the finished product's length. Standardized tenon and mortise structures are directly processed before leaving the factory, giving the flooring its own assembly and interlocking structure. During installation, the tenon and mortise joints are used for positioning, eliminating the need for on-site workers to leave expansion joints based on experience, reducing construction difficulty, ensuring uniform assembly gaps, and improving the aesthetics of the installation. Step Six: Quality Inspection and Warehousing: Quality inspectors conduct quality checks on the processed WPC flooring. Qualified WPC flooring is packaged and stored in the warehouse. Finished boards undergo quality control, rejecting products with dimensional defects, tenon / mortise joint defects, or appearance defects to ensure batch consistency. Qualified products are packaged and stored to prevent moisture damage during warehousing.

[0018] In step one, the additives include lubricants, coupling agents, antioxidants, UV stabilizers, toughening agents, and mildew inhibitors; the wood flour is selected from 80-120 mesh dried poplar or pine flour, with a moisture content controlled to ≤3%.

[0019] Coupling agents improve the interfacial compatibility between polar wood flour and non-polar PE resin, enhance the mechanical strength of the board, and reduce internal porosity; lubricants reduce friction between materials and equipment during extrusion, improve flowability, prevent board sticking to the mold, and enhance the surface finish of the product; antioxidants inhibit the aging of PE resin during high-temperature processing and delay oxidative degradation during the use of the finished product; UV stabilizers enhance outdoor weather resistance and delay fading and chalking under sunlight; toughening agents improve the brittleness of plastic-plastic flooring and reduce the probability of chipping and cracking during tenon and mortise milling; and mildew inhibitors inhibit the wood components from becoming damp and moldy, improving the durability for outdoor use. In step one, the raw material mixing process is as follows: Hot mixing stage: Pour the raw materials into the mixing equipment, control the stirring speed at 600-800 r / min, raise the temperature to 95-115℃, and stir at a constant temperature for 8-12 minutes to achieve wood flour activation, uniform coating of additives, and dehumidification of the material. High-speed stirring and friction assist in heating, activating the wood flour and promoting the full coating of additives on the surface of wood flour particles; at the same time, it evaporates residual moisture in the material, breaks up raw material agglomerates, and achieves preliminary and thorough mixing of wood flour, PE, and additives. Too low a temperature will result in insufficient activation and coating; too high a temperature will cause premature local melting and agglomeration of PE. Cold mixing stage: The mixing equipment is cooled to below 40℃, and the stirring speed is controlled at 200-300 r / min for 5-8 minutes; the material is uniformly plasticized and mixed, and agglomerated particles are eliminated to obtain a homogeneous composite mixture. It is then sealed and allowed to stand for 20-30 minutes for later use; the mixture is quickly cooled to below 40℃ to prevent the material from melting and agglomerating prematurely; the low speed avoids excessive shearing and degradation of the material, resulting in a loose and homogeneous mixture.

[0020] In step two, the extrusion molding equipment includes a feeding section, a melting section, a plasticizing and homogenizing section, and a die forming section. The temperature of the feeding section is set to 155-165℃, the temperature of the melting section is set to 170-180℃, the temperature of the plasticizing and homogenizing section is set to 180-190℃, and the temperature of the die forming section is set to 185-195℃. The speed of the extrusion molding equipment is controlled at 180-240 r / min to continuously extrude the slab at a uniform speed. The feeding section is moderately heated to soften the material only, preventing premature melting, bridging, and blockage, and ensuring stable feeding. The melting section fully melts the PE matrix and impregnates and composites it with wood flour. The plasticizing and homogenizing section further shears and mixes the materials to eliminate unmelted particles and ensure uniform mixing of the wood-plastic two phases. The die forming section controls the appropriate melt viscosity to ensure smooth slab extrusion. If the temperature is too high, the melt will be too soft and the slab will be easily deformed. If the temperature is too low, the fluidity will be poor, resulting in material shortage and surface pitting.

[0021] The embossing roller temperature of the embossing equipment is 55-65℃, and the embossing pressure is 0.3-0.5MPa. The embossing roller temperature is moderate, which will not cause the high temperature of the freshly extruded slab to cool suddenly and generate internal stress, nor will it cause the slab to stick due to excessive temperature. The pressure ensures that the texture is clearly imprinted. If the pressure is too low, the texture will be shallow. If the pressure is too high, the slab will be squeezed thin and deformed.

[0022] In step three, the traction speed of the roller-type traction equipment is 3-6 m / min. The traction speed and extrusion rate are matched. If the speed is too fast, the slab will be stretched, the sheet will become thinner, and tensile stress will be generated inside. If the speed is too slow, the material will accumulate at the die head, the sheet thickness will exceed the standard, and bulges will occur. The 3-6 m / min range ensures that the slab is conveyed at a uniform speed and smoothly, the sheet thickness is uniform, and the risk of subsequent warping and deformation is reduced.

[0023] In step four, the wood-plastic composite flooring needs to be stacked in single layers with staggered joints, leaving ventilation gaps between layers. The temperature in the stacking workshop should be controlled at 22-28℃ to avoid compaction of the boards and ensure air circulation between the upper and lower surfaces of the boards for uniform heat dissipation. This prevents slow local heat dissipation from the stacked boards, which can lead to inconsistent cooling rates at different locations and cause the boards to bend or warp. This temperature range allows for gradual and uniform cooling, maximizing the release of extrusion stress and ensuring dimensional accuracy in subsequent tenon and mortise processing.

[0024] In step six, the quality inspection includes appearance texture, flatness, straightness, dimensional tolerance, mortise and tenon fit accuracy, surface hardness, and whether there are chipped edges or cracks.

[0025] A method for connecting wood-plastic composite flooring with a mortise and tenon structure, the specific steps of which are as follows: Step 1: Pre-treatment of the base surface: Clean the surface of the ground base support joists to remove debris and dust, ensuring that the support surface is flat and free of protrusions. Fix the joists according to the preset spacing to serve as the support base for laying the WPC flooring; prepare several WPC flooring panels. Step 2, Positioning and placing the boards: Take out the first piece of wood-plastic composite flooring, place it stably on the joists, adjust its position to ensure that the board is placed straight, and complete the initial positioning; Step 3, Mortise and Tenon Pre-Joint Operation: Take the second piece of WPC flooring, align the groove at the end of the second piece of WPC flooring with the splicing connecting block at the end of the first piece of WPC flooring, and push the second piece of WPC flooring horizontally so that the splicing connecting block slides into the groove to achieve a snap-fit. After the snap-fit ​​is completed, a splicing gap is reserved between the first and second pieces of WPC flooring. Step 4, Continuous installation cycle: Repeat step 3 to continuously assemble the subsequent WPC flooring, and complete the tenon and mortise joints and sealing component assembly of adjacent boards in sequence, gradually completing the WPC flooring installation in the entire area; Step 5, Overall Calibration: After all boards are spliced, check all splicing positions and gap dimensions, make minor adjustments and corrections to misaligned or offset boards, and complete the overall connection and installation of the wood-plastic flooring.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the invention is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A processing technology for wood-plastic composite flooring with mortise and tenon joints, characterized in that, The specific steps of the processing technology for this wood-plastic composite flooring are as follows: Step 1: Raw material preparation: Select 30%-50% PE, 40%-60% wood flour, and 4.5%-13% additives, and mix the above three raw materials evenly using a mixing device for later use; Step 2, Composite Co-extrusion Molding: The raw material is extruded using extrusion molding equipment, and the surface of the extruded wood-plastic flooring is embossed using embossing equipment; Step 3, First Cut: The extruded wood-plastic flooring is conveyed into the cutting equipment by a roller-type traction device, and the wood-plastic flooring is initially cut to the required length according to the customer's needs; Step 4: Cooling: Place the pre-cut WPC flooring on a cooling rack to cool naturally for 8-10 hours; Step 5, Secondary Cutting: Place the cooled wood-plastic flooring inside the cutting equipment and cut it precisely to the required length according to the order size. Then, use a tenon and mortise joint machine to process the ends of the wood-plastic flooring. Step Six: Quality Inspection and Warehousing: Quality inspectors conduct quality inspections on the processed WPC flooring. WPC flooring that passes the inspection is packaged and stored in the warehouse.

2. The processing technology for a wood-plastic composite flooring with a mortise and tenon structure according to claim 1, characterized in that: In step one, the additives include lubricants, coupling agents, antioxidants, UV stabilizers, toughening agents, and mildew inhibitors; the wood flour is selected from 80-120 mesh dried poplar or pine flour, with a moisture content controlled to ≤3%.

3. The processing technology for a wood-plastic composite flooring with a mortise and tenon structure according to claim 1, characterized in that: In step one, the raw material mixing process is as follows: Hot mixing stage: Pour the raw materials into the inside of the mixing equipment, control the stirring speed at 600-800 r / min, raise the temperature to 95-115℃, and stir at a constant temperature for 8-12 minutes to achieve wood powder activation, uniform coating of additives, and dehumidification of materials. Cold mixing stage: The mixing equipment is cooled to below 40℃, the stirring speed is controlled at 200-300 r / min, and the stirring is carried out for 5-8 minutes; the material is uniformly plasticized and mixed, and agglomerated particles are eliminated to obtain a homogeneous composite mixture. It is then sealed and allowed to stand for 20-30 minutes for later use.

4. The processing technology for a wood-plastic composite flooring with a mortise and tenon structure according to claim 1, characterized in that: In step two, the extrusion molding equipment includes a feeding section, a melting section, a plasticizing and homogenizing section, and a die forming section; the temperature of the feeding section is set to 155-165℃, the temperature of the melting section is set to 170-180℃, the temperature of the plasticizing and homogenizing section is set to 180-190℃, and the temperature of the die forming section is set to 185-195℃; the speed of the extrusion molding equipment is controlled at 180-240 r / min, and the slab is extruded continuously at a uniform speed; The embossing roller temperature of the embossing equipment is 55-65℃, and the embossing pressure is 0.3-0.5MPa.

5. The processing technology for a wood-plastic composite flooring with a mortise and tenon structure according to claim 1, characterized in that: In step three, the traction speed of the roller traction device is 3-6 m / min.

6. The processing technology for a wood-plastic composite flooring with a mortise and tenon structure according to claim 1, characterized in that: In step four, the wood-plastic composite flooring needs to be stacked in single layers with staggered joints, with ventilation gaps between layers, and the temperature in the stacking workshop should be controlled at 22-28℃.

7. The processing technology for a wood-plastic composite flooring with a mortise and tenon structure according to claim 1, characterized in that: In step six, the quality inspection includes appearance texture, flatness, straightness, dimensional tolerance, mortise and tenon fit accuracy, surface hardness, and whether there are chipped edges or cracks.

8. A method for connecting wood-plastic composite flooring with a tenon and mortise structure according to any one of claims 1-7, characterized in that: The specific steps of this connection method are as follows: Step 1: Pre-treatment of the base surface: Clean the surface of the ground base support joists to remove debris and dust, ensuring that the support surface is flat and free of protrusions. Fix the joists according to the preset spacing to serve as the support base for laying the WPC flooring; prepare several WPC flooring panels. Step 2, Positioning and placing the boards: Take out the first piece of wood-plastic composite flooring, place it stably on the joists, adjust its position to ensure that the board is placed straight, and complete the initial positioning; Step 3, Mortise and Tenon Pre-Joint Operation: Take the second piece of WPC flooring, align the groove at the end of the second piece of WPC flooring with the splicing connecting block at the end of the first piece of WPC flooring, and push the second piece of WPC flooring horizontally so that the splicing connecting block slides into the groove to achieve a snap-fit. After the snap-fit ​​is completed, a splicing gap is reserved between the first and second pieces of WPC flooring. Step 4, Continuous installation cycle: Repeat step 3 to continuously assemble the subsequent WPC flooring, and complete the tenon and mortise joints and sealing component assembly of adjacent boards in sequence, gradually completing the WPC flooring installation in the entire area; Step 5, Overall Calibration: After all boards are spliced, check all splicing positions and gap dimensions, make minor adjustments and corrections to misaligned or offset boards, and complete the overall connection and installation of the wood-plastic flooring.

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