Auxiliary guide wheel abrasion part and preparation method

Abstract

The invention discloses an auxiliary guide wheel abrasion part which is prepared from modified thermoplastic materials by injection molding or compression molding. The modified thermoplastic materialscomprise, by weight, 100 parts of matrix resin, 0.1-0.5 part of antioxidants, 0.1-20 parts of fire retardants, 0.1-10 parts of abrasion-resistant agents and 0.1-3.5 pasts of additives. The auxiliaryguide wheel abrasion part is directly injected and molded without extruding and granulating, and modified additives are added by a master batch mode. The thermoplastic materials have a low friction coefficient and a flame-retardant function and are excellent in abrasion resistance and simple in manufacturing process. The prepared abrasion part wraps an outer ring of an aluminum alloy support, abrasion of the support and a cement track beam caused by direct contact between the support and the cement track beam can be avoided, and the running noise of a vehicle is low. The abrasion part is convenient to replace and low in cost, labor-hour consumption is reduced by 60%, the cost is reduced by 90%, and repair and maintenance cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of materials, in particular to an auxiliary guide wheel wearing part and a preparation method. Background technique [0002] The straddle monorail transit system has become the preferred solution for urban rail transit due to its strong climbing ability, small turning radius, and low cost. The straddle-type monorail vehicle is guided by the guide wheels in the bogie system. In order to improve the anti-overturning stability of the vehicle, auxiliary guide wheels (or "safety wheels") are usually added outside the guide wheels. The diameter of the auxiliary guide wheels is compared to The diameter of the guide wheel is small, and the guide wheel and the track beam fit closely during normal driving, while there is a certain gap between the auxiliary guide wheel and the track beam. When the inflatable rubber guide wheel blows out, the auxiliary guide wheel can temporarily act as a guide. When the vehicle passes through a...

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Problems solved by technology

[0003] According to the application conditions of the auxiliary guide wheel, it is usually designed as an aluminum alloy support body. A single aluminum alloy support body has the following problems as an auxiliary guide wheel: on the one hand, the aluminum alloy support body has high strength, and it is easy to damage the cement track beam during long-term operation, while the cement track beam is easy to damage during long-term operation. The track beam is not easy to repair, and the running noise is loud; on the other hand, after the support body is worn out, it is complicated to replace and disassemble, and the maintenance cost is high

[0004] Thermoplastic materials are used in various industries due to their good processing performance, reusability, and low cost. However, pure resin materials cannot meet specific product performance requirements and generally need to be modified. However, most of the existing modified plastics are to improve thermoplasticity. A certain aspect of the performance of the material, such as flame retardancy or wear resistance, is rarely considered, and it has not been reported before that the modified thermoplastic material is used as the wear part of the guide wheel. The application in this area is more about the integration of rubber and metal hubs. The form of vulcanization molding, but the vulcanized rubber has poor bearing capacity, cannot be recycled, and the processing cost is high

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