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The synthetic sleeper is composed of continuous glass fiber reinforced polyurethane foam material. It has the characteristics of glass fiber reinforced plastic composite material and foam material. It has the advantages of natural wood and plastic. For example, it has higher strength, higher specific modulus and can be used as structural material. It is light in weight, heat-insulating, chemical-resistant, insulating, and resistant to aging. It has similar wood properties, such as nailing and riveting. It is mainly used in high-speed railways and subways (such as ballasts, Bridge tops, platforms, etc.) ,especially where the use of concrete sleepers is limited.
Product Features
- The installation on site is simple, and the maintenance and repair works are greatly reduced.。
- It can keep the distance between the rail and the guard rail, the sleeper and the guard and the geometry of the line well, and the line condition is excellent and basically unchanged.
- The sleeper surface is not easily peeled off.
- Sizes available: sleeper height not less than 140mm, width not less than 200mm, and length upon customer need.
- Product quality standard: CJ/T399-2012
Sleeper material strength
| Item | JIS E1203:2007 Strength |
(CJ/T399-2012) AGICO Sleeper Strength |
|
| Material Strength | Bending Strength | min. 70 N/mm2 | min. 80 N/mm2 |
| Young 's modulus in flexure | min. 6000 N/mm2 | min. 7000 N/mm2 | |
| Withstand bending load | min. 170 kN | min. 170 kN | |
| Longitudinal compressive strength | min. 40 N/mm2 | min. 50 N/mm2 | |
| Shearing strength | min. 7 N/mm2 | min. 7 N/mm2 | |
| Adhesion shearing strength | min. 7 N/mm2 (base-material breakage) | min. 7 N/mm2 (base-material breakage) | |
| Electrical Properties | Alternating-current breakdown voltage | min. 20 kV | min. 20 kV |
| Direct-current insulation resistance | min. 1 X 1010 Ω | min. 1 X 1010 Ω | |
| Pulling Strength | Track spike pulling strength | min. 15 kN | min. 20 kN |
| Screw spike pulling strength | min. 30 kN | min. 40 kN | |
| Unit volume mass | 0.74土 0.1 g/cm3 | 0.74土 0.1 g/cm3 | |
| Amount of water absorption | max. 10 mg/cm2 | max. 10 mg/cm2 | |
Production Process
Main raw and auxiliary materials: continuous glass fiber, polyether polyol, isocyanate and related components
1) Yarn system (creel, collection plate, traction head)
2) Polyurethane foam feeding system (batch tank, foaming machine, sweeping frame, swing frame and chiller)
3) Material unwinding system (unwinding frame, heating platform and structure)
4) Rolling mold system
5) Rear conveying system (conveying platform and cutting machine)
6) Impregnation Facility
7) Adhesive equipment
8) Surface coating equipment
9) Inspection equipment
The synthetic sleeper is made of long glass fiber as the reinforcing material, with polyurethane resin as base material to be foamed, solidified and synthesized. At the beginning, two kinds of liquid polyurethane raw materials of A and B are sent to mix by the metering pump in certain ratio at the head facility, then uniformly poured onto the glass fiber surface, and after being evenly kneaded, it is then foamed, solidified and formed into a rolling mold, and finally the synthetic product is automatically tracked and cut at the production line. The semi-finished product is cut into a certain length as needed, and then grinded, compounded, coated or sprayed to become a finished product.
Product Environment
Certificate
Anyang General International Co., Ltd. Is a most competitive railway and accessory producer and supplier in China. It has 18 professional production lines, more than 1,000 types of equipments and 11 production workshops. The company is mainly engaged in the production of railway related parts, and has many years of production experience and strong technical research and development team strength. At present, our company can produce and develop various fastener products, including the product for railway, high-speed rail, city railway, tram and subway and so on.
Our company insists on "scientific and technological innovation, quality first, excellence, honesty and trustworthiness" as our consistent policy, giving full play to the advantages of talents, perfect quality management system, perfect testing, measurement and testing methods, analyzing products, Inspection, testing, and ready to provide reliable products.
From 2018 on, we have successfully developed FFU synthetic sleepers which can be used equivalent of Japan Sekisui sleepers, but with more competitive price.