PU solid bicycle tire containing ETPU foaming particles and manufacturing method of PU solid bicycle tire

Abstract

The invention discloses a PU solid bicycle tire containing ETPU foaming particles and a manufacturing method of the PU solid bicycle tire. The manufacturing method comprises the following steps: using existing production equipment for producing the PU solid bicycle tire for production, and adding the ETPU foaming particles into a mold in advance, wherein the volume of the ETPU foaming particles is 15% to 20% of the total volume of the mold; pouring raw materials for synthesizing PU into the mold through a casting machine; during centrifugal pouring, controlling the rotating speed of a centrifugal mold to be 850 to 1000 r / min; and during pouring, under the effect of centrifugal force, gathering the ETPU foaming particles with relatively small density towards the inner ring part of the tire, wherein relatively few ETPU foaming particles are arranged at the outer ring part of the tire, and micro foaming PU is mainly arranged at the outer ring part of the tire. The PU solid bicycle tire has the advantages that the elasticity and riding comfort level are greatly improved, and the elasticity is increased by 20% to 30%; the weight of the solid bicycle tire is reduced, and the weight of each tire is reduced by about 1 kg; and existing production equipment for polyurethane solid bicycle tires can be used for processing, so that the cost is not obviously increased.

Description

technical field [0001] The invention belongs to the technical field of manufacturing PU solid tires, and relates to a PU solid bicycle tire containing ETPU foam particles and a manufacturing method thereof. Background technique [0002] Bicycles, also known as bicycles, include ordinary pedal bicycles, electric bicycles, and tricycles. It is a green and environmentally friendly means of transportation. Bicycle tires require excellent toughness and explosion-proof wear resistance. What people develop the earliest, what still widely used until today is the rubber pneumatic tire, but a fatal weakness of the rubber pneumatic inner tube is exactly to be easy to blow out in summer. People have developed a kind of polyurethane solid tire made of polyurethane (PU) microcellular elastomer afterwards. [0003] Polyurethane microcellular elastomer (that is, foamed polyurethane) is a material that combines the good mechanical properties of elastomers and the comfort of foam. It has ex...

AI Technical Summary

Problems solved by technology

[0005] Single-density solid polyurethane tires made purely from polyurethane microcellular elastomers according to the above-mentioned rapid aging and demoulding process have problems such as heavy weight, insufficient elasticity (low elasticity), and poor riding comfort.

At present, the various methods newly developed to improve the elasticity of tires generally have problems such as difficult processing and high manufacturing costs.

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