Steel Reinforced Rail Pad for Crane Rails
Product Description
Continuous Steel Composite Rail Rubber Pads with abrasion resistance, compression, antioxidant, anti ultraviolet radiation and oil resistant made of synthetic rubber. The rubber pads on the surface of the groove, can ensure the rail and ground pad has close contact, reduce the wear pad. The pad is embedded in the middle of a reinforcing steel sheet pad lateral stiffness. The thickness of the steel sheet is very thin, easy to roll up the transportation, steel sheet width and the rubber pad width is proportional to the temperature range of -25ºC~100ºC.
Detailed Photos
Continuous Steel Composite Rail Rubber Pad is in the middle of micro convex, so its reasonable stress. Plate above a small rectangular convex strip is easy to deformation, not only make the plate and rail is easy to contact, but also increase the elasticity of the plate. The shock absorption effect. It is beneficial to the mechanical parts of the crane, the normal operation of the electric and the service life.
Product Parameters
The pad width should be nominally 5mm less than the rail foot width.
Types of Continuous Rubber Rail Pad
| TYPE |
WIDTH(W mm) |
| MK7-098 |
98 |
| MK7-118 |
118 |
| MK7-128 |
128 |
| MK7-134 |
134 |
| MK7-147 |
147 |
| MK7-157 |
157 |
| MK7-168 |
168 |
| MK7-195 |
195 |
| MK7-215 |
215 |
Specification:
1. Rubber pads use oil resistant rubber,the performance should conform to GB/T5574-1994 standard <industrial rubber>, Rubber pads machinery to meet the following requirements:
| Name |
Hardness
(Shore A ) |
Tensile Strength
N/mm² |
Elongation at Break(%) |
Pressured Elastic Modulus N/mm² |
| Composite Rubber Pad |
H7-H8 |
>13 |
>250 |
80~120 |
2. The bond stress between steel and rubber of composite rubber pad >1 N/mm²
3. Shore Hardness:75°±A 5(DIN53505)
4. Tensile Strength:(ASTMD412C)leave factory 12.5N/mm²^2-aging 10.5N/mm^2
5. Elongation: leave factory 250%-aging 200%
6. Long Deformation(According to BS903 part A6)leave factory less than 5%,aging less than 20%
7. Allowable Compression Stress:80N/mm^2=80MPa
8. Operating Temperature: from -25ºC to100ºC
9. Noise and Vibration Reduction:Noise average reduction 10% DBA,vibration average reduction 48%
The rail rubber pad can be made of various kinds of material rubber to make vulcanization molding, the general shock absorber is natural rubber, the oil resistance is butyronitrile, the acid and alkali use ethylene propylene rubber, the high temperature oil and so on use fluorine glue. The rail rubber pad is a rubber sleeper. The blend of natural butadiene is mainly used as insulation and elastic (shock absorber).
Rail rubber pad inspection items and determination principles.
Objective: to guide the inspection personnel and ensure the quality of products.
Technical requirements of rail rubber pad:
1. Materials: rubber pad materials are mainly composed of natural rubber or synthetic rubber, and no reclaimed rubber is allowed.
2. The pads must be manufactured according to the drawings approved by the ministry of railways.
3. Appearance quality:
(1) The surface is smooth and trim.
(2) Lack of Angle: at both ends of the four positions, there is no more than one third of the missing Angle.
(3) For the two working surfaces, due to impurities, bubbles, water lines, sulks, and the lack of adhesive area of 9mm2, the depth shall not be greater than 1mm, and each block shall not exceed two places. Sponges: sponges that are not allowed on the working surface and are not allowed to have more than a third of the feet on the four positioning feet.
(4) Edge: no more than 3mm.
Rail pads are widely used in the railway fastening system. They are placed between the steel rail and the sleepers or tie plates for the purpose of eliminating the shocks and vibration caused by passing train. With the elasticity characteristics of rubber and eva and hdpe material, rail pad can keep the closed contacting with the rail above and the sleeper and tie plate underneath.
Not only for the advantages of above mentioned points, the rail pad can perform the function as below:
Load distribution for the passing train on rail
Elimination of load concentration and stresses
Absorption of uneven contact surfaces between rail and support
Reduction of noise and vibration
We can supply wide range of rail pads from trams and heavy hauled lines, as well as all standard gauge rail tracks. Including rail pads for E type rail fastening systems and SKL type rail fastening systems
We have three kinds of materials for produciton of rail pads: HDPE, EVA and Rubber. Below are the differences of the three rail pads differences.
HDPE:
| Technical Parameter |
Unit |
Technical Requirement |
Value |
| Density |
g/cm3 |
0.95-0.98 |
0.95 |
| Tensile Strength |
Mpa |
≥19 |
19 |
| Elongation |
% |
>80 |
150 |
| Melting Point |
ºC |
170-190 |
190 |
| Insulation Resistance |
Ω |
≥1×1010 |
3.5 ×1010 |
| Hardness |
A |
≥98 |
98(A) |
EVA: Polyethylene 80%, Vinyl Acetate 20%.
| Technical Parameter |
Unit |
Technical Requirement |
Value |
| Density |
g/cm3 |
0.95-0.98 |
0.95 |
| Tensile Strength |
Mpa |
≥15 |
16 |
| Elongation |
% |
>500 |
550 |
| Melting Point |
ºC |
170-190 |
170 |
| Insulation Resistance |
Ω |
≥1×1010 |
5.0 ×1010 |
| Hardness |
A |
≥90 |
92(A) |
Rubber
| Technical Parameter |
Unit |
Value |
| Stiffness |
KN |
90-130 |
| Hardness Shore A |
ºC |
72-80 degree |
| Electronic Resistance |
Ω |
≥ 106 |
| Tensile Strength before Aging |
Mpa |
≥12.5 |
| Elongation before Aging |
% |
≥250 |
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