A novel high-strength and high-shear-resistance synthetic sleeper and its preparation method
A high-strength, high-resistance technology, applied in the direction of track, road, ballast layer, etc., can solve the problem of fatigue resistance, bolt pull-out strength and shear performance, which only meet the requirements of urban rail transit sleepers, synthetic sleeper bonding Surface misalignment, increased product manufacturing costs and other issues, to achieve the effect of enhancing bearing strength and shear resistance, improving shear resistance, and reducing production and processing costs
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[0056] A method for preparing a novel high-strength and high-shear-resistant composite sleeper, comprising the following steps:
[0057] 1) According to the shape required by the product, make the corresponding mold;
[0058] The both sides of the first plate-like body 1 and the double-sides of the second plate-like body 5 are polished rough, after cleaning and drying with acetone, the single side of the first plate-like body 1 and the single side of the second plate-like body 5 Brushing the adhesive on the surface, and then putting the first plate-shaped body 1 into the bottom of the mold, with the side brushed with the adhesive facing up;
[0059] 2) Then lay the fiber cloth 3-1, glass long fiber layer 3-2 and glass chopped fiber layer 3-3 on one side of the first plate-shaped body 1 brushed with adhesive in sequence to form the base fiber Layer 3, then place the ribs 4, and pour resin on the ribs to obtain the parent monomer; wherein,
[0060] The setting direction of the...
specific Embodiment 1
[0066] A new type of high-strength and high-shear-resistance composite sleeper is manufactured as a bridge sleeper with a specification of 3200mm×200mm×240mm (length×width×thickness). This sleeper is applied on the steel girder bridge. Firstly, a glass fiber reinforced epoxy resin-based plate with a thickness of 15mm is prepared through the pultrusion process. After the plate is polished and cleaned, it is brushed with polyurethane adhesive and placed at the bottom of the mold; Arrange glass fiber cloth, continuous glass long fiber, chopped glass fiber, horizontally arrange steel bars with a diameter of ￠15mm, pour polyurethane foam resin, and then arrange glass fiber cloth, continuous glass long fiber, chopped glass fiber, pour Polyurethane foaming resin, repeat this step until the thickness is 225mm; then place the glass fiber reinforced epoxy resin-based plate with a thickness of 15mm brushed with adhesive on it. Close the mold, heat to a temperature of 90°C, and open the m...
specific Embodiment 2
[0070] A novel high-strength and high-shear-resistance composite sleeper is manufactured for heavy-duty railway sleepers with specifications of 5000mm×300mm×300mm (length×width×thickness). This sleeper is applied to heavy-duty railway turnouts. First, a carbon fiber-reinforced polyurethane resin-based plate with a thickness of 30 mm is prepared by molding process. After the plate is polished and cleaned, it is brushed with epoxy resin adhesive and placed at the bottom of the mold; Arrange carbon fiber cloth, continuous carbon long fiber, chopped carbon fiber, horizontally arrange steel bars with a diameter of ￠25mm, pour epoxy foam resin, and then arrange carbon fiber cloth, continuous carbon long fiber, chopped carbon fiber, pour epoxy foam Foam resin, repeat this step until the thickness is 270mm; then place the carbon fiber reinforced polyurethane resin-based plate with a thickness of 30mm brushed with adhesive on it. Close the mold, heat to a temperature of 120°C, and open...
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Abstract
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