Touch screen plastic ball indentation hardness tester

1. summary:

Touchscreen plastic ball indentationhardness testerIt refers to a steel ball with a specified diameter, which is vertically pressed into the surface of the specimen under the test load and maintained for a certain period of time, with a unit indentation area

upThe average pressure tester that can withstand it.

Touchscreen plastic ball indentationhardness testerDesigned and manufactured in accordance with GB3398-2008 and DIN53456 standards, and meets the requirements of ISO2039 standard. It can be used to determine the hardness of automotive engineering plastics ABS and other plastics used in various industries. This instrument measures the ability of polymer materials to resist being pressed in by another rigid object that is considered to have no elastic deformation. This machine adopts a touch screen combined with keyboard operation to control the experimental process, and has the advantages of integration and digitization. It is a new intelligent instrument.

※ Can save the number of experiments and generate an A4 test report

※ Data can be exported via USB

The report format can be edited by oneself

2. Working principle:

According to the relevant requirements of the standard, in the mechanism composed of a frame, loading device, indentation depth indicator device, timing device, and indenter (embedded with steel balls of specified diameter),

The average pressure per unit indentation area sustained by the pressure head vertically pressed into the surface of the specimen under a given test load by the loading device and maintained for a certain period of time. In kgf/mm²or

N/ mm²express.

The hardness value of the ball indentation is calculated according to the following formula:

0．21P

H=

0.25πD（h-0.04）

Where:HBall indentation hardness,kgf/mm²orN/ mm²

P test load,kgforN

D steel ball diameter,mm

The indentation depth after correcting the deformation of the rack,mm

Note:h=h₁-h₂;

h₁Depth of indentation under test load,mm

h₂The deformation of the instrument rack under test load,mm

3、 Main technical parameters:

1. Initial load: 9.8N

2. Test load: 49N, 132N, 358N, 612N, 961N

3. Load accuracy: ± 1%

4. Pressure head diameter: Ø 5mm ± 0.5%, Ø 10mm ± 0.5%

5. Hardness of indenter: 800Hv

6. Sample height: 4mm

7. Maximum allowable height of sample: 30mm

8. Minimum division value for indentation depth indication: 0.001mm

9. Indication accuracy: ± 4%

10. Timing range: 10~90S

11. Timing accuracy: ± 0.5%

12. Host deformation: ≤ 0.05mm

13. Coaxiality between the lifting worktable and the spindle axis: ≤ 0.02mm

14. Effective range of indentation depth: 0.15-0.35mm

15. Sample size: 50 × 50 × 4 or Φ 50 × 4

16. pressLocation of indentation: The distance between the indentation location and the edge of the specimen should not be less than 10mm, and the distance between two indentations should not be less than 10mm