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Manufacturing process of composite sleeper

A manufacturing process and sleeper technology, which is applied in the field of composite sleeper manufacturing technology, can solve problems such as sleeper failure, interlayer shear force damage, etc., and achieve high safety, long service life, and good noise absorption effects

Active Publication Date: 2010-10-06
北京交跃通达检测科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that the polyurethane synthetic sleeper manufacturing process in the prior art adopts a single longitudinal arrangement of glass fibers to guide the yarn, so that the manufactured sleeper is easy to deform and bend when the sleeper is stressed because there is no transverse position. The shear force of reinforcement, which leads to the failure of the interlayer shear force, makes the overall failure of the sleeper, and then provides a sleeper manufacturing process that can produce composite sleepers that do not appear interlayer shear force failure when the force is bent

Method used

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  • Manufacturing process of composite sleeper
  • Manufacturing process of composite sleeper
  • Manufacturing process of composite sleeper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] First, select 30% by weight of trihydric alcohol, 69.9% by weight of isocyanate, and 0.1% by weight of foaming agent, and mix the above raw materials to prepare a polyurethane resin stock solution for use. In addition, the unsaturated polyester resin is diluted with styrene as a solvent to obtain a solution of the unsaturated polyester resin for use. In this embodiment, the phthalic acid type unsaturated polyester resin is selected and added Curing agent diethylenetriamine.

[0046] Choose elm wood as the material of the inner core 1, process it into specifications of 2000-3200mm in length, 100-230mm in width, and 100-290mm in height, and make glass fiber rovings with a linear density of 4800g / km and a single filament diameter of 10μm Wrap the inner core 1 along the longitudinal axis (that is, the angle of longitudinal winding is 0 degrees), and spray the phthalic acid-type unsaturated polyester resin styrene solution with a curing agent added with a viscosity of 300 cp...

Embodiment 2

[0050] Select 59.5% by weight of trihydric alcohol, 40.0% by weight of isocyanate, and 0.5% by weight of foaming agent, and mix the above raw materials to prepare a polyurethane resin stock solution for use. In addition, the unsaturated polyester resin is diluted with the solvent styrene to obtain a solution of the unsaturated polyester resin for use. In this embodiment, the isophthalic acid type unsaturated polyester resin is selected and added Curing agent triethylenetetramine and polymerization inhibitor p-benzoquinone.

[0051] Choose birch as the material of the inner core 1, and process it into specifications of 2000-3200mm in length, 100-230mm in width, and 100-290mm in height, and glass fiber roving with a linear density of 6800g / km and a single filament diameter of 30μm along the Winding the inner core 1 longitudinally, the angle of longitudinal winding is -40 degrees; spraying the isophthalic acid type unsaturated polyester resin styrene solution with a viscosity of ...

Embodiment 3

[0055]Select 29.9% by weight of trihydric alcohol, 70.0% by weight of isocyanate, and 0.1% by weight of foaming agent, and mix the above raw materials to obtain a polyurethane resin stock solution for use. In addition, the unsaturated polyester resin is diluted with the solvent styrene to obtain a solution of the unsaturated polyester resin for use. In this embodiment, the isophthalic acid type unsaturated polyester resin is selected and added The curing agent diaminodiphenylmethane, and the initiator methyl ethyl ketone peroxide.

[0056] Poplar is selected as the material of the inner core 1, processed into specifications of 2000-3200mm in length, 100-230mm in width, and 100-290mm in height, and glass fiber roving with a linear density of 9600g / km and a single filament diameter of 40μm The inner core 1 is wound longitudinally, the longitudinal winding angle is 45 degrees, and the viscosity is 1200 cp isophthalic acid type unsaturated polyester resin styrene solution is spray...

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Abstract

The invention relates to a manufacturing process of a composite sleeper which can be used for supporting a railway rail. The invention selects an inner core of a wood material or an inner core of a composite material, wherein the outside of the inner core of the wood material is provided with an unsaturated polyester resin reinforcement glass fibre roving layer; and the outside of the unsaturated polyester resin reinforcement glass fibre roving layer or the inner core of the composite material is wrapt with glass fibre multi-axial cloth after the surface treatment of a coupling agent, polyurethane resin is sprayed to the glass fibre multi-axial cloth, the glass fibre multi-axial cloth is soaked and foamed fully by utilizing the polyurethane resin, and a polyurethane resin reinforcement glass fibre multi-axial cloth layer is formed. The manufacturing process of the composite sleeper avoids the problem of easy rupture and damage of a sleeper, which is caused by the unidirectional arrangement of the glass fibre.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a manufacturing process of composite sleepers. Background technique [0002] Sleepers are often used to carry objects and are indispensable materials in the fields of railway construction, special track running equipment laying and carrying equipment. According to the difference of its constituent materials, sleepers are mainly divided into wooden sleepers, reinforced concrete sleepers, steel sleepers and composite material sleepers. [0003] Among them, wooden sleepers are more commonly used, which have good elasticity, light weight, simple manufacture and good insulation performance; in railway construction and special track running equipment laying, there is a large friction coefficient between wooden sleepers and crushed stone ballast, which has a stable specialty. In addition, the fasteners in the wooden sleeper are simply connected with the wooden sleeper, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54B29K311/14B29K309/08B29K67/00B29K75/00
Inventor 张听陈文姬孙志杰
Owner 北京交跃通达检测科技有限公司
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