Multidirectional stretching three-dimensional drainage net and forming and manufacturing process thereof

Abstract

The invention relates to a multidirectional stretching three-dimensional drainage net and a forming and manufacturing process thereof, and belongs to the technical field of drainage permeation protection. The drainage net comprises a supporting net and supporting columns, the supporting columns are perpendicular to the supporting net, and the top ends of the supporting columns are connected to the intersection points of the supporting net. The molding and manufacturing process comprises the following steps: mixing the thermoplastic plastic with the color master batch, the nucleating agent and the anti-ultraviolet agent by an automatic mixing machine, and then conveying the mixture to an extruder for extrusion and plasticization; the materials are conveyed to a forming machine through a metering pump and are subjected to dynamic sealing blade coating through a transition plate and a rotary roller, and a hollow three-dimensional plate is formed; and sequentially carrying out longitudinal stretching and transverse stretching on the hollow three-dimensional plate to obtain a bidirectional, three-directional or multi-directional stretching product. By arranging the supporting columns and the multi-direction stretching supporting net structure, the drainage capacity is enhanced, and after plastic is subjected to two-way stretching, the plastic is higher in strength, lighter in gram weight and better in bearing capacity.

Description

Technical Field

[0001] This invention relates to a multi-directional stretchable three-dimensional drainage net and its molding and manufacturing process, belonging to the field of drainage and seepage protection technology. Background Technology

[0002] Currently, three-dimensional drainage nets (also known as three-dimensional geotextile drainage boards, tunnel drainage boards, or drainage boards) on the market are composed of three-dimensional plastic nets. They can replace traditional sand and gravel layers and are mainly used for drainage in landfills, roadbeds, and tunnel walls. Chinese invention patent publication number CN113500832B discloses an anti-clogging three-dimensional composite drainage net, including a core and non-woven geotextiles fixed to both sides of the core. The non-woven geotextiles are formed by needle punching polypropylene fibers. This three-dimensional drainage net is heavy and has directional water guidance, but it cannot guide water in all four directions. The square grid three-dimensional drainage net is also heavy and has relatively low strength. Summary of the Invention

[0003] To address the technical problems existing in the prior art, this invention provides a multi-directional stretched three-dimensional drainage net and its molding and manufacturing process, aiming to improve drainage efficiency, enhance structural strength, and improve material utilization efficiency. Specifically, by introducing a multi-directional stretched structure and diverse mesh designs, the performance of the drainage net is significantly improved. This invention not only improves drainage efficiency but also strengthens the structural strength of the material through the stretching process, enabling the product to exhibit excellent impact resistance and durability while ensuring lightweight and high load-bearing capacity. This allows it to meet the needs of various specific application scenarios, thereby broadening the application range of drainage nets in different fields.

[0004] The present invention provides a multi-directional tensile three-dimensional drainage net, specifically including a support net and support columns, wherein the support columns are arranged perpendicularly to the support net and the top of the support columns are connected to the intersection of the support net.

[0005] Furthermore, the support column is shaped like a frustum.

[0006] Furthermore, the diameter of the top end of the support column is between 1 and 15 mm.

[0007] Furthermore, the height from the upper surface of the support net to the bottom end of the support column is between 2 and 20 mm.

[0008] Furthermore, the support mesh includes several horizontal lines and vertical lines, which are divided into several rectangular mesh openings, the length and width of which range from 5 to 80 mm.

[0009] Furthermore, the support mesh includes several horizontal lines, a first oblique line, and a second oblique line. The horizontal lines, the first oblique line, and the second oblique line divide the mesh into several triangular mesh openings. The length and height of the base of each triangular mesh opening range from 5 to 120 mm.

[0010] Furthermore, the support mesh includes several horizontal lines, vertical lines, a first diagonal line, and a second diagonal line. The horizontal and vertical lines divide the mesh into several rectangular holes, and the vertical lines, the first diagonal line, and the second diagonal line together divide the mesh into several star-shaped holes. The length of any rectangular hole in the vertical direction ranges from 5 to 200 mm, and the length of any two adjacent rectangular holes in the horizontal direction ranges from 5 to 200 mm.

[0011] This invention provides a molding and manufacturing process for a stretched three-dimensional drainage net, specifically including:

[0012] S1. The thermoplastic plastic is mixed with color masterbatch, nucleating agent and UV inhibitor by an automatic mixing machine and then conveyed to an extruder for extrusion and plasticization;

[0013] S2. The material is transported to the molding machine via a metering pump, and then dynamically sealed and scraped by a transition plate and a rotating roller to form a hollow three-dimensional sheet.

[0014] S3. The hollowed-out three-dimensional sheet material is stretched longitudinally and laterally in sequence to obtain bidirectional, tridirectional or multidirectional stretched products.

[0015] Furthermore, the stretching ratio during longitudinal and transverse stretching is controlled between 5 and 15 times.

[0016] Furthermore, the thermoplastic is made of PP or PE material.

[0017] Furthermore, the transition plate is a copper-PTFE composite sealing plate.

[0018] This invention discloses a multi-directional tensile three-dimensional drainage net and its molding and manufacturing process. Its advantages, compared with existing technologies, are enhanced drainage capacity and network structure stability through the use of support columns and a multi-directional tensile support net structure. The support net, composed of different line combinations, can form various mesh structures to enhance drainage performance and structural stability. The perpendicular arrangement of the support columns and the support net ensures the stability of the mesh structure. The transition plate, made of copper-PTFE composite material, provides excellent sealing. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the process flow of the present invention;

[0021] Figure 2 This is a schematic diagram of the bidirectional tensile three-dimensional drainage net structure in Embodiment 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of the three-dimensional tensile drainage net structure in Embodiment 2 of the present invention;

[0023] Figure 4 This is a schematic diagram of the multi-directional tensile three-dimensional drainage net structure in Embodiment 3 of the present invention.

[0024] The diagram shows: 1. Support net; 2. Support column; 3. Top; 4. Horizontal line; 5. Vertical line; 6. First diagonal line; 7. Second diagonal line; 8. Automatic mixing machine; 9. Extruder; 10. Molding machine; 11. Longitudinal stretching device; 12. Transverse stretching device; 13. Traction device; 14. Fixed-length cutting and winding device. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. 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.

[0026] To further understand the invention, the technical solution will be further described below in conjunction with specific embodiments.

[0027] Example 1: As Figures 1-2 As shown, this embodiment provides a multi-directional stretchable three-dimensional drainage net, specifically including a support net 1 and a support column 2. The support column 2 is arranged perpendicularly to the support net 1, and the top end 3 of the support column 2 is connected to the intersection of the support net 1.

[0028] In one specific embodiment of this invention, the support column 2 is shaped like a frustum to increase its support stability. The top end 3 of the support column 2 has a diameter of 3mm, and the cross-sectional dimension of the top end 3 is larger than that of the bottom end. In this embodiment, the bottom end diameter of the support column 2 is 1mm. The height from the upper surface of the support net 1 to the bottom end of the support column 2 is 2mm.

[0029] Furthermore, the support mesh 1 includes several horizontal lines 4 and vertical lines 5, which divide the mesh into several rectangular openings. The length and width of the rectangular openings range from 5 to 80 mm. The larger the diameter of the rectangular openings, the better the drainage effect.

[0030] Example 2: As Figure 1 , 3 As shown, unlike Embodiment 1, the support mesh 1 in this embodiment includes several horizontal lines 4, a first diagonal line 6, and a second diagonal line 7. The horizontal lines 4, the first diagonal line 6, and the second diagonal line 7 divide the mesh into several triangular mesh openings. The base length of each triangular mesh opening ranges from 5 to 120 mm, and the vertical height of the base of each triangular mesh opening also ranges from 5 to 120 mm. The diameter of the top end 3 of the support column 2 is 5 mm, and the cross-sectional dimension of the top end 3 of the support column 2 is larger than that of the bottom end. The height from the upper surface of the support mesh 1 to the bottom end of the support column 2 is 10 mm.

[0031] Example 3: As Figure 1 , 4 As shown, unlike embodiments 1 and 2, the support mesh 1 includes several horizontal lines 4, vertical lines 5, a first diagonal line 6, and a second diagonal line 7. The horizontal lines 4 and vertical lines 5 divide the mesh into several rectangular openings, and the vertical lines 5, the first diagonal line 6, and the second diagonal line 7 together divide the mesh into several star-shaped openings. The length of any rectangular opening in the vertical direction of the vertical line 5 ranges from 5 to 200 mm, and the length of any two adjacent rectangular openings in the horizontal direction of the horizontal line 4 also ranges from 5 to 200 mm. The diameter of the top end 3 of the support column 2 is 15 mm, and the cross-sectional dimension of the top end 3 of the support column 2 is larger than that of the bottom end. The height from the upper surface of the support mesh 1 to the bottom end of the support column 2 is 20 mm.

[0032] Example 4: Figures 1-4 As shown, this embodiment provides a molding and manufacturing process for a stretched three-dimensional drainage net, specifically including:

[0033] S1. Thermoplastic plastics of PP or PE as raw material are mixed with color masterbatch, nucleating agent and UV inhibitor in a specific ratio by automatic mixing machine 8 and then conveyed to extruder 9 for extrusion and plasticization; in this embodiment, the color masterbatch uses calcium carbonate filler with a ratio of 1% to 4%, the nucleating agent uses talc powder with a ratio of 0.5% to 2%, and the UV inhibitor uses carbon black with a ratio of 0.5% to 1.5%.

[0034] S2. The plasticized material is then evenly transported to the molding machine 10 by the metering pump. The molding machine 10 can stably output material pressure of 5-20 MPa. After being dynamically sealed and scraped by the transition plate and the rotating roller, a hollow three-dimensional plate is formed. Specifically, the rotating roller rotates under the drive of the power system. After the molding machine head extrudes the material, the material fills the grooves on the surface of the rotating roller under the dynamic sealing state of the transition plate. The transition plate is a copper-PTFE composite sealing plate.

[0035] S3. The perforated three-dimensional sheet material is drawn by traction device 13 to longitudinal stretching device 11 for longitudinal stretching, with the stretching ratio controlled between 5 and 15 times. It is then drawn by traction device 13 to transverse stretching device 12 for transverse stretching, with the stretching ratio controlled between 5 and 15 times. After stretching, biaxially stretched, triaxially stretched, or multiaxially stretched products can be obtained, depending on the actual needs. Finally, it is drawn by traction machine to fixed-length cutting and winding device 14 for winding, resulting in a rolled product. The stretching ratio is controlled between 5 and 15 times during longitudinal and transverse stretching because, according to actual tests, polypropylene (PP) or polyethylene (PE) materials exhibit the best tensile properties and finer fiberization within this stretching ratio range. Different stretching ratios will result in products with different tensile properties. When the stretching ratio is less than 5 times, stress concentration cracks are prone to appear at the mesh edges; when the stretching ratio is greater than 15 times, brittle fracture is likely, and porosity and water permeability drop sharply.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-directional tensile three-dimensional drainage net, characterized in that, It includes a support net (1) and a support column (2), the support column (2) is set perpendicular to the support net (1) and the top end (3) of the support column (2) is connected to the intersection of the support net (1).

2. The multi-directional tensile three-dimensional drainage net according to claim 1, characterized in that, The support column (2) is shaped like a frustum.

3. The multi-directional tensile three-dimensional drainage net according to claim 1, characterized in that, The diameter of the top (3) of the support column (2) is between 1 and 15 mm, and the height from the upper surface of the support net (1) to the bottom of the support column (2) is between 2 and 20 mm.

4. The multi-directional tensile three-dimensional drainage net according to claim 1, characterized in that, The support mesh (1) includes several horizontal lines (4) and vertical lines (5). The horizontal lines (4) and vertical lines (5) are divided into several rectangular mesh openings. The length and width of the rectangular mesh openings range from 5 to 80 mm.

5. A multi-directional tensile three-dimensional drainage net according to claim 1, characterized in that, The support mesh (1) includes several horizontal lines (4), a first oblique line (6) and a second oblique line (7). The horizontal lines (4), the first oblique line (6) and the second oblique line (7) are divided into several triangular meshes. The length and height of the bottom edge of each triangular mesh range from 5 to 120 mm.

6. A multi-directional tensile three-dimensional drainage net according to claim 1, characterized in that, The support mesh (1) includes several horizontal lines (4), vertical lines (5), a first diagonal line (6) and a second diagonal line (7). The horizontal lines (4) and vertical lines (5) are divided into several rectangular meshes. The vertical lines (5), the first diagonal line (6) and the second diagonal line (7) are divided into several cross-shaped meshes. The length of any rectangular mesh in the direction of the vertical line (5) is 5 to 200 mm. The length of any two adjacent rectangular meshes in the direction of the horizontal line (4) is 5 to 200 mm.

7. A molding and manufacturing process for a multi-directional tensile three-dimensional drainage net as described in claim 1, characterized in that, Specifically, it includes: S1. The thermoplastic plastic is mixed with color masterbatch, nucleating agent and UV inhibitor by automatic mixing machine (8) and then conveyed to extruder (9) for extrusion plasticization; S2. The material is transported to the molding machine (10) by a metering pump, and then dynamically sealed and scraped by a transition plate and a rotating roller to form a hollow three-dimensional plate. S3. The hollowed-out three-dimensional sheet material is stretched longitudinally and laterally in sequence to obtain bidirectional, tridirectional or multidirectional stretched products.

8. The molding and manufacturing process of a multi-directional tensile three-dimensional drainage net according to claim 7, characterized in that, The stretching ratio should be controlled between 5 and 15 times during longitudinal and transverse stretching.

9. The molding and manufacturing process of a multi-directional tensile three-dimensional drainage net according to claim 7, characterized in that, Thermoplastics are made of PP or PE materials.

10. The molding and manufacturing process of a multi-directional tensile three-dimensional drainage net according to claim 7, characterized in that, The transition plate uses a copper-PTFE composite sealing plate.

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