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Car besmear installs a technology: How to determine the hardness of car coating
From;    Author:Stand originally

How to determine the hardness of car coating

The hardness of coating is one of main function of intensity of token coating machinery. At present hardness of type of commonly used fork determines the method will determine the hardness of car coating. Type hardness can divide fork to be mixed for single pendulum type again double place type two kinds, former measured value expresses with second number, latter criterion with expressing at the percentage of vitreous hardness relatively.

Single pendulum labour calls Kenige and hardness of fork of cypress Sa at present again. Manufactories of a few large car coating use instrument of these two kinds of hardness mostly, its car coating especially the hardness index of face lacquer expresses with these two kinds of hardness more, company of the Si Fu that be like a horse, Situolake company, A Kesu company. The working principle that damp of a few kinds of fork experiments is basic and same, when the fork that contacts coating surface namely swings with certain cycle, if the surface is softer, criterion the amplitude attenuation of fork must be jumped over fast, jump over damply conversely slow. Normally road hardness is worth division Buddhist nun to be the half that Bai Saci hardness is worth about. Because the structure of all sorts of fork, weight, dimension, wobbly cycle and amplitude are different, additionally the interaction between fork and coating still depends on the flexibility of coating oneself and viscoelasticity, accordingly all sorts of placing determine to cannot be built as a result mutual the conversion between concerns, when consequently the fork hardness of listed in product standard coating is worth, must the type of the fork instrument that at the same time demonstrate place uses.

Home of the double sclerometer that place type is more commonly used. Its result is set in order to be in swing the damp time of attenuation of the amplitude inside limits and it is on vitreous board at swinging likewise the ratio of the damp time of attenuation of the amplitude inside horny range expresses. Before actual measurement of the double sclerometer that place type must first school calm glass value.

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