Description
Perangkat ini memungkinkan untuk mengukur elastisitas dan kekuatan lapisan melalui pembengkokan pelat logam dengan lapisan teruji yang diterapkan di sekitar satu set batang silinder dengan diameter batang dari 2 mm hingga 32 mm (diameter lain berdasarkan permintaan). Perangkat ini mematuhi ISO 1519-73 dan berlaku untuk cat serta menentukan metode untuk menentukan elastisitas film selama pembengkokan. Metodenya terdiri dari penentuan diameter minimum batang logam berbentuk silinder, setelah ditekuk di sekelilingnya, pelat logam yang dicat, tidak mengalami kerusakan mekanis atau delaminasi film cat satu atau banyak lapis (ISO 1519, DIN 53 152 ). Fleksibilitas diuji dengan membulatkan pelat timah dengan lapisan di sekeliling batang silinder dengan diameter 2 hingga 32 mm. Nilai kelenturan pelapisan dengan ketebalan film tertentu – merupakan diameter batang terkecil, bila retak tidak terjadi.
Penguji Pelapis Bending NOVOTEST BEND IR adalah instrumen yang terdiri dari rangka dengan klem tetap untuk sampel yang diuji dan mekanisme khusus untuk membulatkan pelat di sekeliling batang dengan diameter berbeda. Sampel uji yang telah disiapkan ditempatkan di antara klem dan diamankan dengan memutar pegangan. Setelah itu dorong benda uji ke atas batang dengan cara memutar pegangan dan menekuk pelat di sekeliling batang.
ADVANTAGES
NOVOTEST BEND IR compared to other bend testers for coatings, for example NOVOTEST BEND-ShG, allows to bend with a clearly predetermined gap (or without any gap) around the rod without deviation from the perpendicular and minimizes the impact of human factors on testing accuracy.
SPECIFICATIONS
| Measurement range | from 2 mm to 32 mm (others – on request) |
| The length of the test bars, no more | 80 mm |
| Diameters of cylindrical rods | 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm, 15 mm, 16 mm, 20 mm … 32 mm |
| The material of rods | steel |
Application of the device
It is recommend to use painted tin plate.
Tin plate has to have a smooth surface without any voids, rusty spots, fibrations and impurity.
The test samples are rectangular plate with length 100 – 200 mm and width 20 – 50 mm, which are made of black polished tin metal sheet with thickness 0,25 – 0,32 mm or aluminum sheets and strips with thickness 0.25 – 0.30 mm which coated with single-layer or multi-layer paint film on them.
The method of applying the paint on the material, thickness of film, number of layers, conditions and time of drying and exposure of the film before the test, must be specified in the specifications and technical documentation of the tested material.
The samples before testing are to be withstanded at the conditions which are specified in the specifications and technical documentation of the painting material.
The time and degree of drying is determined according to ISO 1519, DIN 53 152.
The thickness value of tested paint film which applied to the plate can be measured with coating thickness gauges, for example Coating Thickness Gauge NOVOTEST TP-1.
The tin plate is to be secured in clamps on the rod with maximum diameter (20 mm), coated side to outside, and pressing it tightly to the rod, smoothly bend it within 1 – 2 s for 180 ° around the rod.
After that coating layer at the bend-place is to be analysed using magnifying glass with 4-fold zoom for cracks and delamination.
If defects are absent, user has to repeat bending of the plate, but each time at a different location, successively from larger to smaller diameter of the rod, until anу mentioned above defects are spotted.
If the specifications and technical documentation to the painting material stipulated the value of elasticity (rod diameter), the test is carried out using only a rod of this diameter.
The result should be the minimum diameter of the rod in millimeters, when the tested sample after bending haven’t any destruction on paint film.
Evaluation elasticity value of the film through the bending on a metal rod makes after three tests of plates on the same rod.
STANDARD PACKAGE
- Instrument
- Operating manual
- Package
Contact Us:
– Telp & Whatsapp 0812-1248-2471
– Email alfin@testindo.com
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