CN102251443A - High molecular composite sleeper and manufacturing method thereof - Google Patents

Abstract

A polymer composite sleeper and a manufacturing method thereof, belonging to the field of rail transit, solve the problems of easy corrosion of traditional wooden sleepers, poor environmental adaptability, insufficient elasticity of concrete sleepers, and cracking and powdering of ballast. The sleeper comprises an upper steel-plastic geogrid, a lower steel-plastic geogrid and polymer composite materials surrounded by them. The upper steel-plastic geogrid is 80±10mm away from the upper surface of the sleeper; the lower steel-plastic geogrid is 80±10mm away from the lower surface of the sleeper. The polymer composite material comprises 45%-55% by mass of waste rubber, 40%-50% by mass of plastic particles, and 5% by mass of the upper and lower steel-plastic geogrids. Take materials according to the above ratio, crush and mix, heat to 1300°C±50°C, stir and mix thoroughly; when standing and cooling at 800°C±50°C, heat drawing and die extrusion to form bolt holes, and cool to 300°C At ±50°C, add double-layer geogrid to cool and form. Rubber and plastics are derived from discarded tires and recycled plastics, energy saving and environmental protection.

Description

A polymer composite sleeper and its manufacturing method

technical field

The invention relates to a polymer composite sleeper. Applicable to rail transit field.

Background technique

Sleepers are an important part of rail transit. The disadvantages of traditional sleepers are:

1. Traditional wooden sleepers are easy to rot, crack, have poor durability and poor environmental adaptability;

2. The concrete sleepers used today are heavy and not easy to operate manually, especially in areas such as bridges and turnouts, where the rigidity is relatively high and the vibration reduction effect is not obvious, which may easily cause the ballast bed on the bridge to collapse.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the problems existing in the prior art and provide a recycled polymer composite sleeper and its manufacturing method.

The present invention solves the technical scheme of its technical problem:

The utility model relates to a polymer composite sleeper, which comprises upper and lower steel-plastic geogrids and polymer composite materials surrounded by them.

The upper steel-plastic geogrid is 80±10mm away from the upper surface of the sleeper; the lower steel-plastic geogrid is 80±10mm away from the lower surface of the sleeper.

The polymer composite material comprises 45%-55% by mass of waste rubber, 40%-50% by mass of plastic particles, and 5% by mass of the upper and lower steel-plastic geogrids.

A kind of manufacturing method of polymer composite sleeper, this manufacturing method comprises the following steps:

Step 1: The components and mass ratio of the polymer composite material are 50% by mass of waste rubber, 45% by mass of plastic particles, and 5% by mass of the upper and lower steel-plastic geogrids.

Step 2: Take materials according to the components and ratio of Step 1, and mix the crushed waste rubber and plastic particles.

Step 3: Melt the mixture in step 2, heat up to 1300°C±50°C at a speed of 5°/min, keep stirring at this temperature for 5 minutes, and mix thoroughly.

Step 4: When standing and cooling to 800°C±50°C, hot drawing and extrusion with the sleeper steel mold to form bolt holes.

Step 5: Cool to 300°C±50°C, add the upper and lower geogrids according to the distance between the upper steel-plastic geogrid and the upper surface of the sleeper 80±10mm, and the lower steel-plastic geogrid at a distance of 80±10mm from the lower surface of the sleeper, and cool and form.

The crushed waste rubber in step 2 refers to crushing the waste rubber into particles of 5-15 mm.

The cooling forming in the step five refers to forming into a standard sleeper that has been published in China.

The beneficial effects of the present invention are:

Improve sleeper performance, extend sleeper life, save wood. Enhance carrying capacity and increase stability. The double-composite structure of material composite and structural composite can withstand the transportation requirements of large axle load, high density and large volume, improve reliability and service life, and reduce production cost and maintenance cost.

Description of drawings

Fig. 1 Front view of polymer composite sleeper.

Fig. 2 Top view of polymer composite sleeper.

In the figure: bolt hole 1, upper steel-plastic geogrid 2, lower steel-plastic geogrid 3, rail support platform 4.

Detailed ways

The present invention will be further described in conjunction with accompanying drawings.

Implementation Mode 1

A polymer composite sleeper, as shown in FIG. 1 , the sleeper includes an upper steel-plastic geogrid 2 , a lower steel-plastic geogrid 3 and polymer composite materials 5 surrounding them.

The upper steel-plastic geogrid 2 is 80mm away from the upper surface of the sleeper; the lower steel-plastic geogrid 3 is 80mm away from the lower surface of the sleeper.

The polymer composite material 5 includes 50% by mass of waste rubber, 45% by mass of plastic particles, and 5% by mass of the upper and lower steel-plastic geogrids.

A kind of manufacturing method of polymer composite sleeper, this manufacturing method comprises the following steps:

Step 1: The components and mass ratio of the polymer composite material are 50% by mass of waste rubber, 45% by mass of plastic particles, and 5% by mass of the upper and lower steel-plastic geogrids.

Step 2: Take materials according to the components and ratio of Step 1, and mix the crushed waste rubber and plastic particles.

Step 3: Melt the mixture in step 2, heat up to 1350°C at a speed of 5°/min, keep stirring at this temperature for 5 minutes, and mix thoroughly.

Step 4: When standing and cooling to 850°C, hot drawing and extrusion with a sleeper steel mold to form bolt holes 4 .

Step 5: Cool to 350°C, add the upper and lower geogrids at a distance of 90mm from the upper surface of the sleeper to the upper steel-plastic geogrid 2, and 90mm from the lower surface of the sleeper to the lower steel-plastic geogrid 3, and cool to shape.

The crushed waste rubber in the step 2 refers to crushing the waste rubber into 15mm particles.

Implementation Mode Two

The difference between Embodiment 2 and Embodiment 1:

The upper steel-plastic geogrid 2 of a polymer composite sleeper is 70mm away from the upper surface of the sleeper; the lower steel-plastic geogrid 3 is 70mm away from the lower surface of the sleeper.

A kind of manufacturing method of polymer composite sleeper, this manufacturing method comprises the following steps:

Step 1: The components and mass ratio of the polymer composite material are 55% by mass of waste rubber, 40% by mass of plastic particles, and 5% by mass of the upper and lower steel-plastic geogrids.

Step 2: Take materials according to the components and ratio of Step 1, and mix the crushed waste rubber and plastic particles.

Step 3: Melt the mixture in step 2, heat up to 1250°C at a speed of 5°/min, keep stirring at this temperature for 5 minutes, and mix thoroughly.

Step 4: When standing and cooling to 750°C, hot drawing and extrusion molding of the sleeper steel mold.

Step 5: Cool to 250°C, add the upper and lower geogrids to the designed position, and cool to shape.

The crushed waste rubber in the step 2 refers to crushing the waste rubber into 5mm particles.

Implementation Mode Three

The difference between Embodiment 3 and Embodiment 1:

The upper steel-plastic geogrid 2 of a polymer composite sleeper is 90 mm away from the upper surface of the sleeper; the lower steel-plastic geogrid 3 is 90 mm away from the lower surface of the sleeper.

A kind of manufacturing method of polymer composite sleeper, this manufacturing method comprises the following steps:

Step 1: The components and mass ratio of the polymer composite material are 45% by mass of waste rubber, 50% by mass of plastic particles, and 5% by mass of the upper and lower steel-plastic geogrids.

Step 2: Take materials according to the components and ratio of Step 1, and mix the crushed waste rubber and plastic particles.

Step 3: Melt the mixture in Step 2, heat up to 1300°C at a speed of 5°/min, keep stirring at this temperature for 5 minutes, and mix thoroughly.

Step 4: When standing and cooling to 800°C, hot drawing and extrusion molding with sleeper steel molds.

Step 5: Cool to 300°C, add the upper and lower geogrids to the designed position, and cool to shape.

The crushed waste rubber in the step 2 refers to crushing the waste rubber into 10mm particles.

The cooling forming in the step five refers to forming into a standard sleeper that has been published in China.

Claims (4)

1. A polymer composite sleeper, characterized in that: The sleeper includes an upper steel-plastic geogrid (2), a lower steel-plastic geogrid (3) and polymer composite materials (5) surrounded by them; The upper steel-plastic geogrid (2) is 80±10mm away from the upper surface of the sleeper; the lower steel-plastic geogrid (3) is 80±10mm away from the lower surface of the sleeper; The polymer composite material (5) comprises 45%-55% by mass of waste rubber, 40%-50% by mass of plastic particles, and 5% by mass of the upper and lower steel-plastic geogrids. 2. A kind of manufacture method of polymer composite sleeper, it is characterized in that, this manufacture method comprises the following steps: Step 1: The components of the polymer composite material and their mass proportions are 45% to 55% by mass of waste rubber, 40% to 50% by mass of plastic particles, and 40% to 50% by mass of the upper and lower steel-plastic geogrids. 5%; Step 2: Take materials according to the components and proportions of Step 1, and mix the crushed waste rubber with plastic particles; Step 3: Melt the mixture in step 2, heat up to 1300°C±50°C at a speed of 5°/min, keep stirring at this temperature for 5 minutes, and mix thoroughly; Step 4: When standing and cooling to 800°C±50°C, hot drawing and extrusion with a sleeper steel mold to form bolt holes (4); Step 5: Cool to 300°C±50°C, press the upper steel-plastic geogrid (2) to be 80±10mm from the upper surface of the sleeper, and the lower steel-plastic geogrid (3) to be 80±10mm from the lower surface of the sleeper to add the upper and lower geogrids grid, cooling and forming. 3. the manufacture method of a kind of polymer composite sleeper according to claim 2, is characterized in that: The crushing of waste rubber in the second step refers to crushing the waste rubber into particles of 5-15 mm. 4. the manufacture method of a kind of polymer composite sleeper according to claim 2, is characterized in that: The cooling forming in the step five refers to forming into a standard sleeper that has been published in China.

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