| Customization: | Available |
|---|---|
| After-sales Service: | Returns and Exchanges |
| Warranty: | 3 Years |
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Rail screw dowel,also known as rail plastic sleeve, concrete sleeper insert, is a counter-party fastener for a sleeper screw or anchor bolt. It is pre-imbedded into the concrete or wooden sleeper tie. Jointed with screw spikes, guide plates and rail clips, the plastic screw dowel can fasten the steel rail.
The raw material of the Plastic Dowels, Nylon Dowels are glass fiber reinforced polyamide 6(PA6) with anti-ultraviolet and anti-oxidation functions.
The Dowels have a smooth surface, free from defects. Thread is uniform and full, as well as allowing the unscrewing of the Dowel from the sleepers without breaking or damaging the sleepers.
Below are two kinds of materials that used for manufacturing rail screw dowels: HDPE and PA66 Nylon with glass fiber.
HDPE| No. | Technique parameter | Unit | Technical requirement | Value |
| 1 | Density | g/ | 0.95-0.98 | 0.95 |
| 2 | Tensile strength | Mpa | ≥19 | 19 |
| 3 | Elongation | % | >80 | 150 |
| 4 | Melting point | °C | 170-190 | 190 |
| 5 | Insulation resistance | Ω | ≥1×1010 | 3.5×1010 |
| 6 | Hardness | A | ≥98 | 98(A) |
| No. | Technique parameter | Unit | Technical requirement | Value |
| 1 | Density | g | 1.3-1.45 | 1.45 |
| 2 | Tensile strength | Mpa | ≥170 | 178 |
| 3 | Elongation | % | ≤4.4 | 4.0 |
| 4 | Bending Strength | Mpa | ≥250 | 290 |
| 5 | Impact Strength(No gap) | KJ/m2 | ≥80 | 85 |
| 6 | Melting point | °C | 250°C-270 | 270 |
| 7 | Insulation resistance | Ω | ≥1×108 | 5×108 |
| 8 | Glass fiber content | % | 30-35 | 35 |
| 9 | Hardness | HRR | ≥110 | 118 |
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