Manufacturing method of biaxial stretching thick node plastic geogrid

A technology of geogrid and manufacturing method, which is applied in the field of manufacturing biaxially stretched thick-node plastic geogrid, can solve problems such as breakage, failure to guarantee normality, continuous production, and easy deformation of punches, etc., so as to avoid constraints, Improve the node thickness and tensile strength, the effect of small punch size

Inactive Publication Date: 2012-03-28
王奇伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using polypropylene as raw material, the longitudinal and transverse strength of the biaxially stretched geogrid prepared by this method can reach about 45Kn / m, but it is difficult to reduce the size of the grid if you want to obtain a higher strength. Aperture / thickness ratio of 0.35; that is, it is difficult to punch a hole with an aperture of less than 3.5 mm on a plastic flat belt with a thickness of more than 10 mm, and the punch of the die is easily deformed and broken, which cannot guarantee normal and continuous production

Method used

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  • Manufacturing method of biaxial stretching thick node plastic geogrid
  • Manufacturing method of biaxial stretching thick node plastic geogrid
  • Manufacturing method of biaxial stretching thick node plastic geogrid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 as attached figure 1 Shown: A manufacturing method of biaxially stretched thick-node plastic geogrid, including a multi-roll press machine and a plastic extruder, the steps are as follows:

[0029] [1] Use a three-roll press and a plastic extruder to press the initial strip of a thick-node plastic geogrid with a set width and length with pits 1: the pits 1 are manufactured according to the prior art for two-way and three-way Or the number of rows and intervals of punched holes on the initial strip of four-way tensile plastic geogrid; wherein, the impermeable pits 1 set on both sides are on both sides of the smooth plastic flat strip one by one correspond to each other. The lower roll of the three-roll press machine used is a smooth roll, and the surface of the upper roll and the middle roll is provided with a flange that matches the size and shape of the pit 1 of the required initial strip. The gap feeding on the surface of the roller is used to suppress ...

Embodiment 2

[0034] Example 2 as attached figure 2 Shown: step [1] described in embodiment 1 can also adopt twin-roll pressing machine and plastic extruder to press the initial strip of single-sided band pit 1, and lower roll is smooth roll, and the surface of upper roll is provided with required Flanges that match the size and shape of the pit 1 of the initial strip: or the upper and lower rolls of the two-roll press are provided with flanges that match the size and shape of the pit 1 of the desired initial strip , the plastic extruder feeds material in the gap between the surface of the upper roller and the lower roller, and presses out the initial strip with dimples 1 on both sides.

[0035] Steps [2] and [3] are the same as in Example 1.

Embodiment 3

[0036] Example 3 as attached image 3 Shown: A method of manufacturing biaxially stretched thick-node plastic geogrids, including smooth plastic flat strips, as follows:

[0037] [1] Use a double-roller hot press and a smooth plastic sheet to press the initial material belt of a thick-node plastic geogrid with a set width and length with pits 1: the upper and lower rollers of the double-roller hot press are equipped with A flange that matches the size and shape of the pit 1 of the required initial material tape, input a smooth plastic flat belt of corresponding thickness from the gap between the surface of the upper roller and the lower roller, and press out the initial material with pits 1 on both sides Belt: or the surface of the upper roll of the double-roll press machine is provided with a flange, and the lower roll is a smooth roll, then the initial material belt with pits 1 on one side is pressed.

[0038] Steps [2] and [3] are the same as in Example 1.

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Abstract

The invention relates to a manufacturing method of a biaxial stretching thick node plastic geogrid, and the method comprises the following steps: pressing thermoplastic plastic into an initial material tape, which is in set width and length and comprises pits, of the thick node plastic geogrid, punching through holes in the required shape in the pits of the initial material tape, and performing longitudinal and transverse stretching on the initial material tape after punching so as to prepare the thick node plastic geogrid. In the method, the corresponding but non-through pits are firstly pressed on the single side or double sides of a plastic flat tape, thereby reducing the punching thickness, having low requirements on a mold, enabling the size of a punching head to be smaller, preventing a thick plastic plate from restricting the size of the formed holes and greatly improving the node thickness and tensile strength of the biaxial stretching plastic geogrid. Polypropylene is used as a raw material, thereby enabling the node thickness of the biaxial stretching grid to achieve 10-26mm and enabling the comprehensive tensile strength to achieve 50kN / m-100kN / m; and polyester is used as a raw material, thereby enabling the comprehensive strength of the biaxial stretching grid to exceed 100kN / m.

Description

Technical field [0001] The present invention involves processing a plastic geogen grille, especially a double -axis stretch -stretched node plastic geogen grille. Background technique [0002] Plastic geogen grilles are mainly used to increase tendon, carry, and environmental protection of engineering construction. With the advancement of engineering technology, high -standard double -axis stretching plastic geogen grilles need to be increasingly needed.At present, the main method of the manufacturing of the two -axis stretch plastic grille is to heat the surface with smooth plastic plastic on the surface and then heat it, first stretch, and then stretch it horizontally;Methods to improve the strength of the single ribs, and then obtain higher intensity grille.Polypropylene as the raw material, the dual -axis stretching grille, the vertical and horizontal intensity of the two -axis grille according to this method can reach about 45kn / m, but the grille with higher intensity is lim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C59/04B29K23/00
Inventor 王奇伟
Owner 王奇伟
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