Rail Plastic Dowel | Rail Plastic Insert For Rail Fasteners
Model NO.: Rail Screw Dowel
Transport Package:Double Woven Bag, Fumigation Free Pallet
Material:Plastic HDPE, Plastic PA66 with Glass Fiber
Color:PWhite, Black, Blue, or as Per Pantone Color Code
Customized:Customized
Rail Plastic Dowel | Rail Plastic Insert for Rail Fasteners
Also know as plastic sleeve, plastic insert, concrete dowel, concrete insert, Nylon Dowel, PA66 Dowel, being widely used in rail fastening.
It was also called rail plastic sleeve/plastic insert/concrete dowel/ concrete insert, which is a counter-party fastener for a sleeper screw spike or anchor bolt, and it is pre-imbedded into the concrete or wooden sleeper tie, installed together with screw spikes, "guide plates and rail clips to fasten the rail tracks.
Types of Rail Plastic Dowel
Rail Plastic Dowels are always used in SKL fastening systems, and can be classified according to its materials needed: of PA66 or HDPE, depending on different technical specification requirements from clients.
Materials: HDPE, PA6, PA66, PA66+GF30%; Dimension: Different Size Available, Customized according to the drawing; Standard: DIN, NF, AREAMA, etc
HDPE Plastic Dowel Specifications:
| 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) |
Material PA66 : Nylon 66.69%, glass fiber 30%, other 1%.
PA66 Plastic Dowel Specifications
| 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 |
technical specifications of Railway Plastic Insert
| Check Item | STANDARD | ||||||
| 207 | 111 | WJ-2 | X2 | DJK-1 | SK114A | SKL14-D13-B | |
| Length(mm) | 110±1 | 119±0/2 | 135±2/1 | 130±0.5 | 130±0.5 | 165±1 | 165±1 |
| Inner Pole Length(mm) | / | / | / | / | / | / | / |
| Outer Dia(mm) | 53±0.5 | 35±1/0 | 24.5±0.3/0 | 44±0.5/0.3 | 39.5±0.7/0.3 | 39±0.6/0.2 | 39.5±0.6/0.2 |
| Inner Dia(mm) | 31±0.5/0.1 | 25±0.5 | 31±0.5/0.3 | 28±0.5/0.3 | 25±0.15 | 25±0.5/0 | 24.5±0.3/0 |
| Position Hole Inner Dia(mm) | / | / | / | / | / | / | / |
| Bottom Width(mm) | / | / | / | / | / | / | / |
| Verticality | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 |
| Drainage Rate(%) | ≥0.5 | ≥0.5 | ≥0.5 | ≥0.5 | ≥0.5 | / | / |
| Pulling Strength(kN) | ≥80 | ≥50 | ≥50 | ≥50 | ≥50 | ≥75 | ≥75 |
| Insulation Resistance(Ω) | ≥1*10^8 | ≥1*10^8 | ≥1*10^8 | ≥1*10^8 | ≥1*10^8 | / | / |
| Rockwell hardness(HRR) | ≥95 | ≥105 | ≥105 | ≥105 | ≥105 | / | / |
How to install rail plastic dowels?
When using rail plastic dowels, prioritize proper installation by ensuring the dowel is correctly pre-inserted into the concrete sleeper to act as a secure fastening foundation. During operation, maintain alignment and correct torque to prevent wear and potential derailments. Additionally, follow material and environmental precautions by using high-quality, suitable dowels and preventing foreign objects or excessive heat from damaging them.
Installation and alignment
- Pre-insert correctly: The plastic dowel is a crucial pre-embedded component. It must be inserted into the concrete sleeper before the rest of the rail fastening system is assembled.
- Maintain precise alignment: Proper alignment of the dowel ensures a secure connection and is critical for safety, passenger comfort, and efficiency.
- Ensure correct torque: Periodically check the torque on the fasteners. Overtightening can increase stress and wear, while undertightening can lead to loose components. Follow the manufacturer's recommended torque values.
- Check for damage: Inspect the dowels regularly for any damage. Damaged dowels can fail under load, so they should be replaced.
other types of railway fastening from gNEE RAIL
Types of rail fasteners include spikes, clips, bolts, and plates, which are used to secure rails to sleepers and join rails together. Common types include dog spikes and screw spikes for wood sleepers, and elastic clip or blade-type fasteners for concrete sleepers, such as SKL, KPO, and E-clip systems. Other components like fish plates are used to join rail ends, while rail anchors prevent rail movement.
GNEE offers a diverse range of railway fasteners and provides customized solutions based on client specifications.Send your special customization requirements to GNEE.
As a certified manufacturer holding production licenses issued by the Chinese Ministry of Railways, GNEE RAIL has extensive expertise in the railway fastener sector. Our railway fastener products are manufactured from high-quality alloy steel and undergo zinc-aluminum coating treatment to enhance corrosion resistance, meeting the operational requirements of tracks in coastal humid regions. We support personalized customization services. Upon receiving customer drawings or samples, we promptly finalize production process design and implement quality traceability management. Through products offering "high quality and competitive prices" coupled with efficient fulfillment capabilities, we have earned the long-term trust of global rail customers.
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