Suzhou Zhongyue Railway Material Co.,Ltd. |
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The rail pad, originally called sole plate, is used when rail is attached to concrete, rather than timber, ties or
sleepers. Rail pads function to reduce fatigue cracking of the concrete ties, believed to be driven by impact and
vibration from the passing train. It is thought that the rail pads act in two ways: they diminish shock or impact
loads by providing compliance, and they reduce (by isolation and perhaps by damping) resonant vibrations excited
in the concrete ties (lowest resonant frequency about 200 Hz) and accommodate vibration deflections in the rail
sections between the ties (about 0.12mm amplitude, 1000 Hz).
The raid pad prevents rail-sleeper abrasion and the crushing of the
sleeper under the rail foot. Rubber rail pads are normally designed
to a specified load-deflection characteristic. The initial
stiffness of the rail pad is designed to be low so that that their
deformations under the springs toe loads is quite substantial. This
ensures that the rail pad remains in intimate contact with the rail
despite any vertical movements of the latter. When the wheel is
over the pad, the latter's stiffness must be high to prevent large
movements which can result in the metal spring becoming loose. Such
a load-deflection characteristic can be obtained by introducing
grooves in the rubber rail pads. Rubber pad or grooved rubber rail
pad are made up of rubber or plastic to dampen the shocks of
vibrations of a passing train.
We can supply rail pad with a thickness ranging from 5mm to 25mm thick. Pads made of metal bonding
are used to reduce extensive vibrations.
Grooved Rubber Rail Pad
Our range of grooved rubber rail pad is very effective to reduce the shocks of vibrations caused by the trains while
passing through the tracks. These rail pads are highly demanded in railways due to their robustness, long service
life and effective use. With good mechanical features and sustainability, these products can be customized and
are available at a reasonable price.
The ray pad is an end product made from synthetic elastomer and is
used in heavy crane roads and between rail and supporting
structure. It is manufactured in various widths determined
according to rail base dimensions and standard length of 12 m. The
rail pad may be manufactured in different lengths and sizes due to
special demands.
Dramatically Improved Impact Attenuation
HDPE
1. Noise Suppression
2. Improved Passenger Comfort
3. Extended Track Life
4. Extended Ballast Life
The combination of studded design and specially formulated rubber
compound, gives VIP-Polymers patented rail pads a unique high
resilience and abrasion resistance. Their superiority to those
manufactured from other materials has been proven by their ability
to reduce dynamic forces by up to 65%, which is a crucial
consideration for railway systems worldwide as they adopt higher
speeds and greater axle load.The resilient crane rail pad is
designed to allow the rail to move and rotate by small amounts.
When rails are on a pad (called soft mounting), this helps to
ensure a more even stress distribution between the crane wheel and
rail and also between the rail and the surface on which it is
fixed. There are two rail pad types, one for a continuously
supported rail and one for discontinuous mounting.
SUYU specializes in producing rail fastening. A rail pad lies
between the rails and base plates to keep the rail stable. It can
be made of HDPE, EVA, rubber, and EPDM to preclude and buffer
impact, increase friction and reduce vibration. We produce the rail
pad for E type rail fastening system and SKL type rail fastening
system. Following are the properties of the HDPE/EVA/Rubber.
No. | Technical Parameter | Unit | Technical Requirement | Value |
1 | Density | g/cm3 | 0.95-0.98 | 0.95 |
2 | Tensile Strength | Mpa | ≥19 | 19 |
3 | Elongation | % | >80 | 150 |
4 | Melting Point | ℃ | 170-190 | 190 |
5 | Insulation Resistance | Ω | ≥1×1010 | 3.5 ×1010 |
6 | Hardness | A | ≥98 | 98(A) |
EVA: Polyethylene 80%, Vinyl Acetate 20%
No. | Technical Parameter | Unit | Technical Requirement | Value |
1 | Density | g/cm3 | 0.95-0.98 | 0.95 |
2 | Tensile Strength | Mpa | ≥15 | 16 |
3 | Elongation | % | >500 | 550 |
4 | Melting Point | ℃ | 170-190 | 170 |
5 | Insulation Resistance | Ω | ≥1×1010 | 5.0 ×1010 |
6 | Hardness | A | ≥90 | 92(A) |
Rubber
No. | Technical Parameter | Unit | Value |
1 | Stiffness | KN | 90-130 |
2 | Hardness Shore A | ℃ | 72-80degree |
3 | Electronic Resistance | Ω | ≥ 106 |
4 | Tensile Strength before Aging | Mpa | ≥12.5 |
5 | Elongation before Aging | % | ≥250 |