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Preparation method and system for thermoplastic plastic-glass fiber extrusion compounded sleeper

A thermoplastic, extrusion compounding technology, used in other household appliances, household appliances, household components, etc., can solve the problems of low output of a single production line, increase production equipment, and single product structure, eliminate secondary pollution, and increase load. Ability, the effect of speeding up the cooling rate

Pending Publication Date: 2021-01-15
山东高速交通装备有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the output of a single production line is low. If the output requirements are to be met, the number of production lines can only be increased, which requires an increase in the number of production equipment, dies, calibrating dies and other auxiliary machines
[0007] (2) Since this product has been available in China for a very short time, no one has studied more complex structures such as sandwich structures, bosses and other special-shaped structures, and made sleepers with patterns on three sides to increase the friction between the sleeper and the ballast bed and lateral resistance.
This involves simulation calculations, feasibility of molding, etc., which requires interdisciplinary research in material engineering, molding processing, track design, civil engineering, construction, etc. There are few such R&D teams in China engaged in research in this area, so the product structure single
[0008] (3) At present, few people pay attention to the disposal of waste products generated in the production process and the end of service life of composite sleepers

Method used

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  • Preparation method and system for thermoplastic plastic-glass fiber extrusion compounded sleeper
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  • Preparation method and system for thermoplastic plastic-glass fiber extrusion compounded sleeper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This embodiment adopts the cold top method (cold extrusion method, cold push method, hard top method) to make composite sleepers, specifically:

[0040] Weigh the tailings, chopped glass fiber and resins such as PE or recycled plastics according to the proportion, and automatically feed the materials into the high-speed mixer (200L) for pre-mixing. The temperature of the cooling mixer is 30-50°C, and the rotation speed of the stirring blade is 10-100rpm. Optimum parameters: The temperature of the high-speed mixer is 135°C, the rotation speed of the stirring blade is 1200rpm, the temperature of the cooling mixer is 45°C, and the rotation speed of the stirring blade is 65rpm.

[0041] After premixing, it is transported by tank truck or high-level silo, and is fed into the hopper of the blending and modification extruder by the automatic feeder, and is blended and extruded by a Ф50 flat double extruder for granulation. The temperature of this step is controlled 160-210°C ...

Embodiment 2

[0045] The composite sleeper proposed in this embodiment is produced by banburying+cold top method, as follows:

[0046] Specifically, tailings, chopped glass fiber, PE and other resins or recycled plastics are weighed according to the proportion and added to the internal mixer for blending. After mixing, they are crushed and automatically sent to the Ф65 cone double-molding extruder. (or a single-screw extruder with a diameter of more than 150 mm) is melted and plasticized, and a composite sleeper is obtained through die molding. This step controls the temperature at 155-210° C. (the second step). The composite sleeper enters the shaping mold (the shaping mold is fixed on the reinforced shaping table) for shaping.

[0047] After the shaping is completed, it is automatically cut according to the length required by the customer (such as 2.4 meters, etc.). The following post-processing can also be done according to customer requirements, such as embossing or hob processing patt...

Embodiment 3

[0052] This embodiment provides a steel (wood) plastic co-extrusion method to make composite sleepers. In order to improve the bending strength and modulus of composite sleepers, steel pipes, square steel or wooden squares, and glass (basalt) fiber tubes are used as composite sleepers. The core material of the sleeper. In particular, square steel and steel pipes also help heat dissipation during extrusion and reduce expansion. The following uses glass (basalt) fiber pipes as an example to illustrate, such as figure 2 As shown, the inner square tube is a glass (basalt) fiber tube or their braided fabric, and the outer square tube is a composite sleeper;

[0053] Composite sleepers are produced by blending and extruding various additives or recycled plastics. Weigh each component according to the proportion, and automatically feed the material into the 200L high-speed mixer (premix). barrel, through Ф50 flat double extruder blending extrusion granulation control temperature 1...

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Abstract

The invention discloses a preparation method and system for a thermoplastic plastic-glass fiber extrusion compounded sleeper. The method comprises the following steps of weighing various raw materialsof the thermoplastic plastic-glass fiber extrusion compounded sleeper in proportion and feeding the raw materials automatically to be pre-mixed; transferring the pre-mixed raw materials to an automatic feeder, pumping the raw materials, by the automatic feeder, into a hopper of a blending and modifying extruder, for blending and extruding granulation; then feeding the granulated particles into aforming extruder for melted plastifying; feeding the melted materials into a sizing mold for cooling forming or mold pressing forming and carrying out automatic cutting and subsequent treatment according to process requirements; and finally, through inspection, bundling, stacking, packaging and labeling a plurality of qualified products and conveying the products to a warehouse and crushing by a crusher and pulverizing by a pulverizer, and reusing the unqualified products as raw materials.

Description

technical field [0001] The invention relates to a method and a system for preparing a thermoplastic glass fiber extrusion composite sleeper. Background technique [0002] Sleepers support the rails, maintain the position of the rails, and transfer the huge pressure from the rails to the track bed. It must possess a certain degree of flexibility and elasticity, strength and durability. Sleepers are mainly divided into three types: wooden sleepers, concrete sleepers and steel sleepers. [0003] Among them, wooden sleepers have high cost, short service life, frequent replacement, consume a large amount of high-quality wood, are easy to corrode, difficult to prevent corrosion, difficult to maintain geometric shape, easy to damage, poor uniformity, and difficult to regenerate; concrete sleepers are heavy, poor in elasticity, difficult to transport, and energy-saving. High consumption and poor reproducibility. Steel pillows have high cost, low resistance, easy corrosion and lar...

Claims

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Application Information

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IPC IPC(8): B29C69/00B29L31/10
CPCB29C69/001B29L2031/10
Inventor 樊文波郝向阳黄兴启陈安井国庆高承李和平吴越阳吴宣卓廉栋向宏军李新捷王创费曼
Owner 山东高速交通装备有限公司
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