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Brand Name : | GC |
Model Number : | GC-HQY-96 |
Price : | Negotiated |
Payment Terms : | TT |
Supply Ability : | 100 Sets |
Delivery Time : | In stock |
Certification : | ISO |
Durable Hardness Testing Machine Plastic Hardness Testing Machine For Plastic Ball
A. Features:
1. This instrument adopts micro-processing control and integrated
and digital measurement and control technology. Procedural setting
according to the standard test procedure.
2. Chinese color crystal display, touch screen operation, easy to
understand.
3. It adopts digital display dial indicator, high-precision force
value measurement system, high measurement and control
precision and stable control.
4. Micro-printer for data printing.
5. The instrument is upgraded to touch screen control, which is
novel, convenient and easy to operate, and more humanized.
6.Using a large-size 65535 true color screen, the visual effect is
better, and the interface displays more information.
7. Improve the calculation function of the test results, keep
decimals, and round the results to make the calculation results
more accurate.
8.Various parameter settings can be set arbitrarily, which is more
convenient for the testers to operate flexibly and meet
more test requirements
9. Any step in the test can be skipped manually, which is
convenient for testing
B. Hardness test method:
The plastic ball indentation hardness test is to use a steel ball
with a specified diameter to press vertically into the surface of
the sample under the action of the test load, and keep it for a
certain period of time.Then read the indentation depth value.
Obtain its hardness value by calculation or look-up table.
1.The thickness of the sample is not less than 4mm, the adjustable
range of loading speed is within 2-7 seconds, usually 4-6 seconds,
and the loading time is 30 seconds or 60 seconds; The load size
should be selected according to the expected hardness of the
sample. If the hardness is higher, a larger load can be selected;
otherwise, a smaller load should be selected. if unpredictable The
hardness of the sample must be gradually upgraded from a small
load, so as not to damage the steel ball indenter and the sample;
The test can be carried out by selecting the load.
2.Ball indentation hardness means that a steel ball with a
specified diameter is vertically pressed into the surface of the
sample under the action of the test load and kept for a certain
period of time. Finally, the average pressure per unit area is
expressed in Kgf/mm2 or N/mm2.
Its expression is: H=0.21p/0.25πD (h-0.04) (kg/mm2)
P—load (kg)
h—indentation depth (mm)
D—Steel ball diameter (mm)
π - pi
Note: h=h1-h2
h1: Indentation depth of sample load (mm);
h2: The frame deformation of the instrument under the test load
(mm)
3.The distance between the center of the measurement point and the
edge of the sample is not less than 10mm, and the distance
between the centers of two adjacent measurement points is not less
than 10mm
C.Main purpose and function:
Plastic hardness refers to the ability of a plastic material to
resist being pressed into it by another rigid object that is
regarded as not elastically and plastically deformed. The plastic
ball indentation hardness test is to use a steel ball with a
specified diameter to press vertically into the surface of the
sample under the action of the test load, and read the indentation
depth after a certain period of time. Obtain its hardness value by
calculation or look-up table.
Applicable standards:
* GB/T3398.1-2008
Plastics - Determination of hardness - Part 1 Pressure ball method
* ISO 2039-1-2001
Plastic - Determination of hardness by ball pressure
* JJG884-1994
Plastic Rockwell Hardness Tester Verification Regulations
* JJG369
Plastic ball indentation hardness tester inspection rules
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