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Fiber reinforced composite sleeper and preparation method thereof

A fiber-reinforced sleeper technology, which is applied to other household appliances, household appliances, household components, etc., can solve the problems of thin profiles and limited preparation, and achieve the effects of increasing shear strength, improving durability, and improving the production environment

Active Publication Date: 2019-03-22
洛阳双瑞橡塑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the thickness of the profile obtained by impregnating the plastic injection box currently used is relatively thin, and the thickness of the plastic injection box generally does not exceed 5mm
Therefore, the preparation of large cross-section and large-size pultrusion composites is limited

Method used

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  • Fiber reinforced composite sleeper and preparation method thereof
  • Fiber reinforced composite sleeper and preparation method thereof
  • Fiber reinforced composite sleeper and preparation method thereof

Examples

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preparation example Construction

[0038] like Figure 1-3 As shown, the embodiment of the present invention provides a method for preparing a fiber-reinforced synthetic sleeper, comprising the following steps:

[0039] S1. Guide the yarn, import the reinforcing fiber material into the injection box 100;

[0040] S2. Impregnation, injecting the foamed resin matrix 1 into the injection box 100, so that the reinforcing fiber material is impregnated in the foamed resin matrix 1;

[0041] S3. Post-processing, extruding, molding, cooling and cutting the foamed resin matrix 1 with the reinforcing fiber material distributed inside and / or on the surface to obtain the fiber reinforced synthetic sleeper.

[0042]Wherein, the yarn guiding in step S1 refers to guiding at least one of the reinforcing fiber materials into the injection box 100 through the yarn guiding device 200 . The reinforcing fiber material can be any one or several fiber rovings of 1200tex-9600tex, and can also be expanded into ply yarns. The yarn gu...

Embodiment 1

[0051] In this embodiment, three injection boxes 100 are used to prepare the fiber-reinforced composite sleeper. Each injection box 100 has the same size, 235 mm in width, 14 mm in thickness, and 1500 mm in length. The width is 235mm and the surface density is 300g / m 3 There are 4 layers of glass fiber grid cloth, which are arranged on the upper and lower ends of the upper and lower injection boxes 100 and 100 respectively, and enter the injection cavity 104 together with the glass fibers. In terms of parts by mass, the formula of the fiber-reinforced synthetic sleeper is as follows: 100 parts of polyurethane isocyanate, 100 parts of polyol mixture, 30 parts of glass fiber grid cloth, and 170 parts of continuous glass fiber. The reinforcing fiber content is 50% in total.

[0052] Through steps S1 to S3, the production density is 740kg / m 3 Several synthetic sleepers were bonded to each other to obtain an integral synthetic sleeper with a thickness of 75mm. Then two integral ...

Embodiment 2

[0054] In this embodiment, six glue injection boxes 100 are used, and each of the glue injection boxes 100 has the same size, 235mm in width, 14mm in thickness, and 1500mm in length. With a width of 235mm and a surface density of 300g / m 3 There are 6 layers of glass fiber grid cloth, which enter the glue injection cavity 104 together with the glass fibers. In terms of parts by mass, the formula of the fiber-reinforced synthetic sleeper is as follows: 100 parts of polyurethane isocyanate, 100 parts of polyol mixture, 40 parts of glass fiber grid cloth, and 200 parts of continuous glass fiber. The reinforcing fiber content is 55% in total.

[0055] Through steps S1 to S4, the production density is 740kg / m 3 , a synthetic sleeper base material with a thickness of 145mm. The synthetic sleeper base material is made into such a Figure 8 Synthetic sleeper products shown.

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Abstract

The invention relates to a fiber reinforced composite sleeper and a preparation method thereof. The preparation method of the fiber reinforced composite sleeper comprises the following steps that S1,yarn guiding; S2, dipping; and S3, post-treatment, wherein the dipping is performed in a glue injection box, a glue injection hole is formed in the glue injection box, an inlet and an outlet are formed in the two ends of the glue injection box respectively, a foaming resin base body is injected into the glue injection box through the glue injection hole, a reinforced fiber material enters the glueinjection box through the inlet, and is soaked in the foaming resin base body; and the interior and / or the surface of the foaming resin base body distributed with the reinforced fiber material is sent out through the outlet. According to the method, the problem of insufficient soaking of fiber yarn bundles is solved, the sealed glue injection box is arranged, so that the resin liquid is directlysoaked into the sealed glue injection box through a glue injection machine and is not directly exposed in the air, and namely the production environment can be obviously improved.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a fiber-reinforced synthetic sleeper and a preparation method thereof. Background technique [0002] At present, the sleepers used in railway lines are mainly prestressed reinforced concrete sleepers and wooden sleepers. Known prestressed reinforced concrete sleepers are widely used in railway tracks because they are rich in raw materials, easy to ensure the size of production, large in quality, long in life, and can improve the stability of the track. However, prestressed reinforced concrete sleepers are difficult to install on site because of their large weight, and also have disadvantages such as poor elasticity and high rigidity, so their use in specific areas or locations is limited. Known wooden sleeper is widely used in special sections such as bridges and turnouts because it has good elasticity, is easy to process, and is convenient to replace. But high-qualit...

Claims

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Application Information

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IPC IPC(8): B29C70/52
CPCB29C70/524B29C70/526B29L2031/001
Inventor 佘新光魏凯耀张兴刚
Owner 洛阳双瑞橡塑科技有限公司
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