A kind of production method of graphene polyurethane agricultural machinery crawler

Abstract

The invention relates to a production method of a graphene polyurethane agricultural machinery caterpillar track. The production method includes: self-preparing prepolymer which comprises 66.5-71% of polyurethane resin, 15-20% of isocyanate, 2-5% of reinforced graphene, 5-8% of flame retardant, 2% of cold-resistant agent, 2% of wear-resistant agent, 1% of antiager, 0.05-0.1% of catalyst, 0.1% of gelation delaying agent and 0.1-0.2% of defoamer; cleaning and assembling a mold, and putting a carbon fiber net and a steel wire net in the mold; preparing a crosslinking agent which accounts for 12-20% of total amount of the prepolymer; preheating the prepolymer and the crosslinking agent, respectively injecting the same into a pouring machine, and filling with the mold; putting the mold in an oven, sulfurating at constant temperature, and demolding. The graphene polyurethane agricultural machinery caterpillar track formed at one step is free of breaking and delaminating; service life of the caterpillar track is more than 8 folds of that of common rubber; shearing strength, tensile strength, wear resistance and aging resistance of the caterpillar track are improved substantially.

Description

technical field [0001] The invention relates to agricultural machinery crawler technology, in particular to a production method for graphene polyurethane agricultural machinery crawlers such as agricultural harvesters, cultivators, excavators, and picking collectors. Background technique [0002] Agricultural machinery includes agricultural harvesters, cultivators, excavators, picking and collecting machines, etc., which are mainly used for farmland operations in soft or wet environments. The machinery must run smoothly through crawler belts in this environment. [0003] The above is an overview of agricultural machinery. What needs to be pointed out in this case is that the crawlers of agricultural machinery currently on the market are made of steel or rubber. This kind of steel or rubber track has the following disadvantages: [0004] First of all, the disadvantages of using steel tracks are as follows: [0005] (1) The steel crawler is too heavy, it will consume more en...

AI Technical Summary

Problems solved by technology

[0005] (1) The steel crawler is too heavy, it will consume more energy, and the flexibility is not enough;

[0006] (2) The noise of the steel crawler is too loud, which brings more discomfort to the operator;

[0007] (3) Steel crawlers can easily cause greater damage to ordinary road surfaces;

[0008] (4) The installation of steel track is cumbersome

[0010] (1) The rubber track type is made of rubber and multi-layer mesh cloth or steel wire by hot pressing, which is easy to delaminate, resulting in reduced use effect and shortened service life;

[0011] (2) The rubber track is made of rubber, and the shear strength and tensile strength of the rubber are relatively low, and the aging resistance of the rubber is also low. Therefore, the service life of the rubber track is very long in a high-strength working environment. Low;

[0012] (3) The rubber track will become hard, brittle, and the toughness will be greatly reduced in the environment of -20°C, which will lead to the fracture of the track. Therefore, the efficiency of the rubber track in the low temperature environment will be greatly reduced;

[0013] (4) Rubber is not resistant to acid and alkali corrosion, and the service life of rubber tracks will be greatly shortened when they are operated in the acid rain environment in the south and other saline-alkali environment