(QBY film pendulum hardness tester) paint tester QBY-II | Инструменты

(QBY film pendulum hardness tester) paint tester QBY-II | Инструменты

A,purpose

according toHG2-57-67Standard design, used to test the hardness of the film, in accordance with a certain weight and length of the pendulum rod, the fulcrum of the pressure on the film swing. Self amplitude5Deg-2Determine the hardness of the film by the time it takes.

Two,Structure and working principle

The instrument consists of the following components:

1BaseTwoPillarThreeTest standFourPendulum rodFiveScaleSixBrake leverSevenHorizontal hammerEightFulcrum steel ballNineA zero frame (used to hold the pendulum bar at the zero point)TenSwing bar beam (used for connecting two swing bars with two steel balls). 11Adjust the hammer (for adjusting amplitude, time, size).12A horizontal screw (used to adjust the instrument to a horizontal position based on a horizontal hammer)

2Principle of operation:

The ratio of the time required for the pendulum to stop swinging on a certain amplitude of the paint film and the time required for the pendulum to swing on the same amplitude of the glass plate is indicated.

Three,Specifications

1The weight of swing bar and its parts is120gram.

2Swing the rod from the bracket to the length of the pendulum500Mm.

3Fulcrum ball diameter8Mm.

4The scale shall be engraved with the graduated zero between the scales, and begin to mark each end from zero5Above degree.

5Glass value is440.6Seconds.

Four, use:

1Check and correct before use.

Not less than once per day and night, the pendulum hardness tester is corrected by the glass number method. On the glass plate2-3)*9*12centimeterUpper swing rod5Deg-2The swing time (in seconds) of the pendulum amplitude is the same as that of the film hardness (see the test method below).

The glass value of the instrument shall be440.6Seconds. If the glass value is not within the range specified above, the adjusting hammer shall be adjusted to conform to the standards.

Before the test, the glass panels should be carefully cleaned with ether or gasoline.

The fulcrum steel ball should be checked regularly. When the steel ball surface is damaged, the steel ball can be slightly rotated and its contact point can be exchanged.

If the surface of steel ball does not meet the requirement, new ball should be replaced.

The steel balls should be cleaned with ether or gasoline before each test and dried with clean gauze.

2,Instructions

(1) in accordance with the provisions of style product standards, preparation method of brushing pattern on the glass plate, drying time or drying method, paint, paint layer thickness, sample from placed into the trial time shall comply with the rules of operation.

(2Prepare the appropriate templates for the instrument's Workbench3The paint film faces upwards. Put the fulcrum of the pendulum rod to the ball8Position the surface of the paint film and swing the lever close to the scale5Zero point, then move the zero box9So that the pendulum lever is pointing0On the dot.

The pendulum rod will be attached to the sample4Lead to the scale line55Brake lever6Carefully push, beware of the ball move.

Push brake lever6Swing the handle and release the pendulum leverFourSwing freely, as the maximum amplitude is placed5Turn on the stopwatch and put it at the maximum amplitude2Stop the stopwatch when.

(3)Film HardnessXWork out the following formula.

X=t/t1

In type:tOn the film, the pendulum rod5Deg-2Swing time (sec.)

T1-440Seconds.

(4The hardness of the film should be measured two times, as the difference between the two measurements is greater than that of the film3%Third determinations should be carried out.

When measuring, the position of the fulcrum of the swing rod shall be no less than the edge of the film2centimeterAnd each time it is done, it should be done in different places on the paint film.

(5)To avoid the effects of air flow, the instrument should be placed in a glass cabinet.

(6)In order to reduce vibration and self shaking. The accuracy of the work shall be affected and the instrument shall be attached to the fastening table.

Five,Storage and transportation:

1In the long distance transportation and storage, the instrument uses damp proof articles (plastic bags) and is packed in wooden cases with boards. The cases should be filled with soft packing in case of shock.

2The place where the instrument is stored should be dry and the air should not contain corrosive gases.

QBYType 2 pendulum rod type film hardness testerQBYModification of pendulum pendulum type hardness tester. Its main characteristics are the improvement of the horizontal mechanism; the scale can move horizontally to facilitate the adjustment of the zero point; besides, the photoelectric counter is equipped with the photoelectric counter; therefore, the utility model has the advantages of fast, accurate and labor saving.

The design basis of this instrument is still as followsGB1730-79. Therefore, the sampling test for paints, varnishes and related products, the determination of paint, varnish and related products of coating hardness.

A,Technical index

(I) pendulum

1Form of pendulumM-3

2The total quality of the pendulum120g.1g

ThreeGlass value of pendulum440S.6SNumeration:352.4second

(two) dedicated counter;

1Power supply22V~ 50HZ

2Power dissipation4W

ThreeCounting range0~999

Three working principle and structure

1Principle of operation

There is a certain weight and shape of the contact surface to be measured, the film, due to the interaction between the gravity pendulum and coating are two kind of complicated elastic and viscoelastic, and because the weight of the pendulum, the shape and the geographical and environmental factors, therefore, the surface is soft, in contact with this a surface gravity swing amplitude decay faster.

H=n/n0

n.

n0

2

QBYab

cde

1

2UU2

Three

Four5

5440S.6S352.4

Six

Seven

Eight

Nine2~5

Ten3%5%

11

Twelve

1325.1C60%~70%

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