PVC composite floor with s-shaped back groove and special manufacturing equipment thereof

Abstract

This invention discloses a design for PVC composite flooring with S-shaped back grooves and its dedicated manufacturing equipment. The design includes several S-shaped back grooves formed on the back of the PVC composite flooring. The depth of each S-shaped back groove is one-third the thickness of the PVC substrate. The width of the S-shaped back groove from the edge of the PVC substrate is greater than 2 cm, the spacing between adjacent S-shaped back grooves is 3-5 cm, and the width of each S-shaped back groove is 3-5 mm. By creating the S-shaped back grooves, the width expansion and deformation rate of the PVC substrate under certain temperature and humidity conditions are reduced, increasing the toughness of the PVC substrate, especially for wide materials, while simultaneously reducing the weight of the PVC substrate material. Furthermore, a dedicated processing equipment is designed to simultaneously perform grooving and lay the elastic strips, offering high production efficiency. The addition of a dust extraction pipe not only promptly removes debris generated during grooving, reducing the feeding resistance of the elastic strips, but also indirectly protects the working environment, ensuring smooth machine operation and employee health.

Description

Technical Field

[0001] This invention relates to the field of new materials technology for forest building materials and plastic flooring, specifically to the design of PVC composite flooring. Background Technology

[0002] Current PVC flooring still faces many challenges. For example, the high proportion of heavy calcium carbonate powder in the formula design results in a high overall density of the flooring, requiring more energy during transportation and installation. The use of numerous additives in the production of high-quality PVC flooring puts it at a disadvantage in terms of environmental protection, low carbon footprint, and resource recycling, failing to leverage waste and resulting in higher material costs. Although measures such as introducing mechanical structures (CN108547430B) and improving the bonding process (CN103436206B) can indeed improve the quality of PVC flooring, its material stability is still poor over long-term use, and flooring deformation still occurs during its service life. Increasing the hardness of PVC flooring (CN109821715B) leads to a lack of flexibility, resulting in a poor user experience. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of insufficient stability, floor deformation, high hardness, poor flexibility, and poor foot feel caused by the material preparation process.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a PVC composite flooring design with S-shaped back grooves, comprising a PVC substrate, wherein a plurality of S-shaped back grooves are formed on the back side of the PVC substrate, wherein the depth H2 of the S-shaped back grooves is 1 / 3 of the thickness H1 of the PVC substrate, the width D1 of the S-shaped back grooves from the edge of the PVC substrate is greater than 2cm, the spacing D2 between adjacent S-shaped back grooves is 3-5cm, and the width D3 of the S-shaped back grooves is 3-5mm.

[0005] Specifically, the S-shaped back groove has 3-5 wave crests and an amplitude of 8-10cm.

[0006] Specifically, the cross-section of the S-shaped back groove is trapezoidal, with the short side of the trapezoid on one side of the outer surface of the PVC substrate.

[0007] Specifically, the S-shaped back groove is embedded with an elastic soft strip. The cross-sectional shape of the elastic soft strip is similar to that of the S-shaped back groove, but its area is larger than that of the S-shaped back groove. The side of the elastic soft strip facing the outer surface of the PVC substrate is frosted and flush with the outer surface of the PVC substrate.

[0008] Specifically, the elastic strip has a Young's modulus of 300-450 MPa, a tensile strength of 20-30 MPa, a friction coefficient of 0.7-1.0 on the frosted surface, and a water absorption rate of 0.04-0.15.

[0009] To realize the above-mentioned design scheme of PVC composite flooring with S-shaped back groove, a special manufacturing equipment is disclosed, characterized in that: the equipment consists of mounting columns, motor, grooving knife, adjuster, bending column, nailing column and dust suction pipe.

[0010] Specifically, the motor is fixed to the side of the mounting column, the adjuster is fixed to the side of the motor, the adjuster is connected to the bent column, the nail column is fixed to the end face of the bent column, and the dust suction pipe is fixed to the mounting column.

[0011] Specifically, the cross-section of the grooving knife is the same as the cross-section of the S-shaped back groove, the position of the nail post is adjacent to the grooving knife, and the installation depth of the tip of the nail post does not exceed the installation depth of the bottom of the grooving knife.

[0012] Specifically, the suction port of the suction pipe is located above and to the side of the grooving knife. When the grooving knife and the nail post are adjacent to each other, they are both located within the working area of ​​the suction port.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. By opening S-shaped curved grooves on the back of the PVC substrate, the width expansion and deformation rate of the PVC substrate under certain temperature and humidity conditions are reduced, the toughness of the PVC substrate is increased, especially the toughness of wide materials is further demonstrated, and at the same time the weight of the PVC substrate material is reduced, thus reducing its energy consumption during transportation and installation.

[0014] 2. By adding an elastic strip to the S-shaped groove on the back of the PVC substrate, and making the exposed surface of the elastic strip frosted, the friction of the PVC composite flooring is increased while maintaining the overall surface effect of the PVC substrate. At the same time, the elasticity of the PVC composite flooring is enhanced, making it more comfortable underfoot.

[0015] 3. The specially designed manufacturing equipment can lay the elastic strip while grooving, which has the advantage of high production efficiency. At the same time, the addition of the dust suction pipe not only cleans up the debris caused during grooving in time and reduces the feeding resistance of the elastic strip, but also indirectly protects the working environment, ensuring the smooth operation of the machine and the health of the employees. Attached Figure Description

[0016] Figure 1 This is a diagram showing the positional relationship of the S-shaped back groove of the present invention; Figure 2 This is a cross-sectional view of the S-shaped back groove of the present invention; Figure 3 This is a back view of the PVC composite flooring of the present invention; Figure 4 This is an overall structural diagram of the special equipment of the present invention; Figure 5An enlarged view of the special device A of this invention; Figure 6 This is a diagram illustrating the operational effect of the special equipment of the present invention.

[0017] In the diagram: 1-PVC substrate, 2-S-shaped back groove, 3-elastic strip, 4-mounting post, 5-motor, 6-grooving knife, 7-adjuster, 8-bending post, 9-nail post, 10-vacuum pipe. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-6 This invention provides a design for a PVC composite floor with S-shaped back grooves. The technical solution is as follows: several S-shaped back grooves are formed on the back of the PVC substrate. The depth H2 of the S-shaped back groove is 1 / 3 of the thickness H1 of the PVC substrate. This is to reduce the damage to the strength of the PVC substrate while meeting the installation conditions of the elastic strip. The width D1 of the S-shaped back groove from the edge of the PVC substrate is greater than 2cm, the spacing D2 between adjacent S-shaped back grooves is 3-5cm, and the width D3 of the S-shaped back groove is 3-5mm.

[0020] Specifically, in order to reduce the vertical deformation rate of the PVC substrate during use and to control the sliding of the elastic strip, the S-shaped back groove has 3-5 crests and an amplitude of 8-10cm.

[0021] Specifically, the cross-section of the S-shaped back groove is trapezoidal, with the short side of the trapezoid on one side of the outer surface of the PVC substrate, so as to obtain an S-shaped back groove with self-locking capability in the cross-section.

[0022] Specifically, an elastic strip is embedded in the S-shaped back groove. The cross-sectional shape of the elastic strip is similar to that of the S-shaped back groove to achieve a better fit between the elastic strip and the S-shaped back groove, making it less likely for the elastic strip to slip out after being embedded in the S-shaped back groove. The cross-sectional area of ​​the elastic strip is slightly larger than that of the S-shaped back groove. The end face of the elastic strip facing the outer surface of the PVC substrate is frosted and flush with the outer surface of the PVC substrate. Since there are many types of elastic strips that meet these conditions, no further limitations are made here.

[0023] Specifically, the Young's modulus of the elastic strip is 300-450 MPa, the tensile strength is 20-30 MPa, the coefficient of friction of the frosted surface is 0.7-1.0, and the water absorption rate is 0.04-0.15. Based on the characteristics of PVC material, the shear strength, tensile strength, and coefficient of friction of the elastic strip are specified to ensure long-term stable static friction during the service life of the S-groove PVC composite flooring. The limitation on the Young's modulus is for the convenience of installing the elastic strip, while the limitation on the water absorption rate is established from the perspective of consistency of the S-groove PVC composite flooring.

[0024] To realize the above design scheme and facilitate production, a special manufacturing equipment is proposed, which consists of a mounting column, a motor, a grooving knife, an adjuster, a bending column, a nailing column, and a dust suction pipe.

[0025] Specifically, the motor is fixed to the side of the mounting column, and the adjuster is fixed to the side of the motor. The adjuster is connected to the bent column. The function of the adjuster is to change the installation depth and spatial angle of the nail column. Since there are many devices that meet this requirement, no further limitation is made here. The nail column is fixed to the end face of the bent column, and the suction pipe is fixed to the mounting column. In this invention, the main function of the suction pipe is to remove debris generated during grooving, so the location of its suction port is important. The air pump and other mechanisms connected to the suction pipe can adopt general production requirements, so they will not be described in detail. In this special equipment, the grooving knife is the key equipment for determining the cross-sectional shape of the S-shaped back groove, but since it is an existing commodity, it will not be described in detail here.

[0026] Specifically, the cross-section of the grooving tool is the same as the cross-section of the S-shaped back groove, the position of the nail post is adjacent to the grooving tool, and the installation depth of the tip of the nail post does not exceed the installation depth of the bottom of the grooving tool.

[0027] Specifically, the suction port of the suction pipe is located above and to the side of the grooving knife. When the grooving knife and the nail post are adjacent to each other, they are both located within the working area of ​​the suction port.

[0028] When using it for the first time, insert the nail into the elastic strip. This will feed the elastic strip and make it fit into the S-shaped back groove.

[0029] To further illustrate the essence of the present invention, the following embodiments are described: Example 1

[0030] For a 1m*1m PVC substrate, before operation, install specialized equipment on the CNC machine tool, connect an additional air pump to the dust extraction hose, fix the unprocessed PVC substrate in the fixture, insert the elastic strip into the pin post with the frosted side of the elastic strip facing upwards, and then reset the pin post using the adjuster. To meet the material characteristics of the elastic strip, fluorinated butyl rubber composite material with one side frosted is selected. In the CNC machine tool program, set D1 to 2cm and D2 to 3cm. To meet the installation conditions of the elastic strip while minimizing damage to the strength of the PVC substrate, the cutting depth H2 is 1 / 3 of the PVC substrate thickness H1, the number of S-shaped back groove peaks is set to 3, and the amplitude is set to 8cm. Then, insert the grooving cutter (4mm major diameter, 3mm minor diameter) into the motor mounting port. Then start the motor; the grooving cutter rotates and, under program control, begins to feed from the edge of the PVC substrate to perform the S-shaped back groove grooving operation. Meanwhile, debris generated during grooving is cleaned up by a vacuum pipe, and the nail post is fed along with the elastic strip along with the grooving cutter, filling the smooth S-shaped back groove. Since the cross-section of the S-shaped back groove is trapezoidal, similar to the cross-section of the elastic strip, the elastic strip is confined within the S-shaped back groove. After processing and filling a single S-shaped back groove, excess elastic strip at both ends of the PVC substrate is removed. The number of S-shaped back grooves processed is determined based on the size of the PVC substrate. After processing the entire PVC substrate, a PVC composite floor with multiple S-shaped back grooves, embedded elastic strips, and a flat back is obtained. Example 2

[0031] For a 1.2m x 1.2m PVC substrate, before operation, install specialized equipment on the CNC machine tool. Connect the dust extraction hose to an additional air pump. Fix the unprocessed PVC substrate to the fixture. Insert the elastic strip into the pin, with the frosted side of the elastic strip facing upwards. Then, reset the pin using an adjuster. To meet the material properties of the elastic strip, fluorinated butyl rubber composite material with one side frosted is selected. In the CNC machine tool program, set D1 to 2.5cm and D2 to 5cm. To meet the installation conditions of the elastic strip while minimizing damage to the strength of the PVC substrate, the cutting depth H2 is 1 / 3 of the PVC substrate thickness H1. Set the number of S-shaped back groove peaks to 5 and the amplitude to 10cm. Then, insert the grooving cutter (major diameter 5mm, minor diameter 3mm) into the motor mounting port. Then start the motor. At this time, the grooving cutter rotates and, under program control, feeds from the edge of the PVC substrate to perform the S-shaped back groove grooving operation. Meanwhile, debris generated during grooving is cleaned up by a vacuum pipe, and the nail post is fed along with the elastic strip along with the grooving cutter, filling the smooth S-shaped back groove. Since the cross-section of the S-shaped back groove is trapezoidal, similar to the cross-section of the elastic strip, the elastic strip is confined within the S-shaped back groove. After processing and filling a single S-shaped back groove, excess elastic strip at both ends of the PVC substrate is removed. The number of S-shaped back grooves processed is determined based on the size of the PVC substrate. After processing the entire PVC substrate, a PVC composite floor with multiple S-shaped back grooves, embedded elastic strips, and a flat back is obtained.

[0032] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0034] 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 variations 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 specialized manufacturing apparatus for producing PVC composite flooring with S-shaped back grooves, comprising a PVC substrate, characterized in that, The back of the PVC substrate has several S-shaped back grooves. The depth H2 of the S-shaped back groove is 1 / 3 of the thickness H1 of the PVC substrate. The width D1 of the S-shaped back groove from the edge of the PVC substrate is greater than 2cm. The spacing D2 between adjacent S-shaped back grooves is 3-5cm. The width D3 of the S-shaped back groove is 3-5mm. The equipment consists of a mounting column, a motor, a grooving knife, an adjuster, a bending column, a nail column, and a suction pipe. The motor is fixed to the side of the mounting column, the adjuster is fixed to the side of the motor and connected to the bending column, the nail column is fixed to the end face of the bending column, and the suction pipe is fixed to the mounting column. The cross-section of the grooving knife is the same as the cross-section of the S-shaped back groove, the position of the nail post is adjacent to the grooving knife, and the installation depth of the tip of the nail post does not exceed the installation depth of the bottom of the grooving knife. When the special manufacturing equipment is in use, the nail post is inserted into the elastic strip, which drives the elastic strip to feed and embeds the elastic strip into the S-shaped back groove.

2. The specialized manufacturing equipment for producing PVC composite flooring with S-shaped back grooves according to claim 1, characterized in that: The S-shaped back groove has 3-5 wave crests and an amplitude of 8-10cm. The cross-section of the S-shaped back groove is trapezoidal, with the short side of the trapezoid on one side of the outer surface of the PVC substrate.

3. The specialized manufacturing equipment for producing PVC composite flooring with S-shaped back grooves according to claim 1, characterized in that: The S-shaped back groove is embedded with an elastic strip. The cross-sectional shape of the elastic strip is similar to that of the S-shaped back groove, but its area is larger than that of the S-shaped back groove. The end face of the elastic strip facing the outer surface of the PVC substrate is frosted and flush with the outer surface of the PVC substrate. The elastic strip has a Young's modulus of 300-450 MPa, a tensile strength of 20-30 MPa, a friction coefficient of 0.7-1.0 for the frosted surface, and a water absorption rate of 0.04-0.

15.

4. A specialized manufacturing equipment for producing PVC composite flooring with an S-shaped back groove according to claim 1, characterized in that: The suction port of the suction pipe is located above and to the side of the grooving knife. When the grooving knife and the nail post are adjacent to each other, they are both located within the working area of ​​the suction port.

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