Rail plastic dowel is also called concrete dowel, concrete insert, rail plastic sleeve, plastic insert, etc. The function of rail plastic dowel is to insulate the fastener parts from the ties, so the quality of this small pre-embedded part into the concrete sleeper, especially its strength and fatigue life, is of great importance to the safety of the whole rail line.
Rail plastic dowel is one part of rail fastening system, it should be pre-inserted into the concrete sleeper separately before assembling the rail fastening system parts, so it can be considered as the fastening foundation.
Rail plastic dowel is a counter-party for the anchor bolt or sleeper screw spike, usually, it is used to guarantee the good connection and linkage of the rail fastening system with the concrete sleeper, with screw spikes or bolts.
Signum can provide different types of rail washers with various specifications to meet customers' requirements.
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.
| 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 |
COMPANY INFORMATION
Kunshan Signum Machinery Technology Co.,Ltd is a professional supplier of rail screw dowel.
We can provide railway fastening products according to customers drawings and samples.Our main products are as following:
1. Screw spike, Coach screw, Drive screw, Sleeper screw, Dog spike, Railroad spike, Lock spike, Cut spike,etc.
2. Rail clip, Tension clamp,SKL clip, Pandrol clip, Deenik clip.
3. Swivel bolts, Track bolt, Special bolts, U bolts, J bolts, Anchor bolts, Foundation bolts, Stud bolts, Rod bolts, Curved bolts, Tunnel bolts.
4. Tie plate, Base plate, Rail plate, Rail fixing base, Rail Pads, Sole plate, Sole pad
5. Fish plate, Joint bar, Rail joint, Splice bar.
6. Track bolt, T bolt, Rail bolt, Clamp bolt, Inserted bolt, Clip bolt, Fish bolt, Square bolt, Rod bolt, rail joint bolt.
7. Clamp plate, Rail spring clamp, Anchor plate, Steel clip.
8. Rail Shoulder, Rail sleeper Inserts, Rail Anchors for rail sleepers.
9. Plastic dowel, Guide plate, Nylon insert.
10. Chinese Standard Steel Rail: GB/T11264-89 9kg 12kg 15kg 22kg 30kg steel light rail; Q/YYG001-2008 (formerly YB222-63) 4kg 8kg 18kg 24kg steel light rail. GB2585-2007 38kg 43kg 50kg 60kg 75kg steel heavy rail. YB/T5055/93 QU70 QU80 QU100 QU120 crane rail.
11. German Standard Steel Rail: DIN536 A45 A55 A65 A75 A100 A120 A150 Crane Rail.
12. American Standard Steel Rail: ASTM-A1 ASCE25, ASCE30, ASCE40, ASCE60,ASCE75,ASCE85,90RA,115RE,136RE,175LBs Steel Rail.
13. British Standard Steel Rail: BS11-1985 BS50O,BS60A,BS60R,BS70A,BS75A,BS75R, BS80A,BS80R,BS90A, BS100A, BS113A.
We can make products as per customers' drawings and samples.
