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Infiltration device for composite sleeper preparation

A composite sleeper and pre-impregnation technology, applied in the direction of tracks, roads, ballast layers, etc., can solve problems such as poor fiber and resin infiltration, and achieve the effect of improving production efficiency

Pending Publication Date: 2019-07-23
QINGDAO HILYWILL ADVANCED MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the technical problem of poor fiber and resin impregnation in the composite sleeper manufacturing process, the inventor introduced high-frequency vibration pretreatment in the composite sleeper manufacturing process, and optimized the frequency and amplitude of high-frequency vibration. The vibrating roller, together with the fixed roller, excites the fiber and resin mixture, so as to achieve the purpose of migration and redistribution of resin and foaming agent, and produce well-impregnated sleeper products

Method used

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  • Infiltration device for composite sleeper preparation
  • Infiltration device for composite sleeper preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Fiber pretreatment: 1) immerse the glass fiber in alkali solution with a pH value of 14 for 3 hours; 2) wash and dry, immerse in 2wt% chitosan aqueous solution for 1 hour, wash and dry to obtain the modified fiber.

[0027] After spraying, the fiber passes through the gate composed of the primary high-frequency vibration roller and the fixed roller with rubber outer layer, and extrudes and pre-impregnates the fiber after spraying the resin; the pre-impregnated fiber continues to pass through the secondary high-frequency vibration roller The fibers are infiltrated; the fibers impregnated by the secondary high-frequency vibration roller pass through a group of preformed plates with oblong cross-section and tapered ends to form a pre-impregnated fiber composite material with uniform distribution of fibers up and down.

[0028] The diameter of the primary vibration roller is 100mm, the vibration frequency is 10,000 times / min, and the amplitude is 1mm; the diameter of the sec...

Embodiment 2

[0030] After spraying, the fibers pass through the gate formed by the primary high-frequency vibration roller and the fixed roller with rubber outer layer, and the fibers after spraying resin are extruded and pre-impregnated; the pre-impregnated fibers pass through the secondary high-frequency vibration roller to continue The fibers are infiltrated; the fibers impregnated by the secondary high-frequency vibration roller pass through a group of preformed plates with oblong cross-section and tapered ends to form a pre-impregnated fiber composite material with uniform distribution of fibers up and down.

[0031] The diameter of the primary vibration roller is 100mm, the vibration frequency is 12000 times / min, and the amplitude is 0.5mm; the diameter of the secondary vibration roller is 100mm, and three secondary vibration rollers are used, the vibration frequency is 15000 times / min, and the amplitude is 0.3mm.

[0032] The preparation process is the same as in Example 1.

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Abstract

The invention discloses a vibration auxiliary pre-infiltration device for a composite sleeper. According to the vibration auxiliary pre-infiltration device for the composite sleeper, fibers sprayed with resin are extruded and pre-impregnated through a gate formed by a primary high-frequency vibration roller and a fixed roller with a rubber outer layer; secondary high-frequency vibration rollers continues infiltrating the pre-impregnated fibers; the fibers infiltrated by the secondary high-frequency vibration rollers pass through a set of pre-forming plates with long oval sections and two tapered ends to form a pre-infiltrated fiber composition material with uniformly distributed fibers up and down; the diameter of the primary vibration roller is 40-150 mm, the vibration frequency is 5000-25000 times / minute, and the amplitude is 0.3-2 mm; and the vibration frequency of the secondary vibration rollers is 8000-30000 times / minute, and the amplitude is 0.2-1.5 mm. Through vibration extrusion, the resin and the fibers can be fully infiltrated, and the problem that the auxiliary infiltration device is blocked by foaming material residues is solved; and the resin and the fibers can be fully infiltrated by 150 seconds or within, and the infiltrated fibers are evenly distributed, so that the production efficiency is improved.

Description

technical field [0001] The invention relates to a resin composite sleeper impregnation device, which belongs to the field of railway track material equipment. Background technique [0002] The early sleepers were made of high-quality wood, which had the disadvantages of perishability and high maintenance costs, and were gradually replaced by cement sleepers on a large scale. However, the rigidity of cement sleepers caused greater vibration during train operation. Polyurethane elastic sleeper is a structural material made of rigid polyurethane foam resin reinforced with reinforcing fiber yarns and made by pultrusion. It has corrosion resistance, durability, insulation, high strength, and has light weight and durability similar to wood Reprocessing performance. The earliest polyurethane sleeper was developed by Japan's Sekisui Chemical Industry Co., Ltd. in 1975. This FFU synthetic sleeper is made of glass long fiber reinforced rigid polyurethane foam. At present, companies ...

Claims

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Application Information

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IPC IPC(8): B29B15/14E01B3/46
CPCB29B15/14E01B3/46
Inventor 李卫中肖倩胡娅婷
Owner QINGDAO HILYWILL ADVANCED MATERIALS TECH
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