Product category:
Materials Testing
News Release from: Labthink Testing Instruments | Subject: Falling Dart Impact Tester
Edited by the Manufacturingtalk Editorial
Team on 07 August 2006
Falling dart tests plastics films and
foils
A falling dart impact tester is applicable in energy test that causes plastic films and foils to fail under specified conditions of impact of a free-falling dart from a specified height.
Falling Dart Impact Tester is applicable in energy test that causes plastic films and foils to fail under specified conditions of impact of a free-falling dart This energy is expressed in terms of the weight of the dart falling from a specified height which would result in 50% failure of specimens tested
This article was originally published on Manufacturingtalk on 26 Mar 2007 at 8.00am (UK)
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* Characteristics.
Compatible with state and international standards.
Novelty mechanical sculpt, considerate design.
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Two test methods integration: A and B.
Special lighting design, easy to observe.
Micro-computer processes test results.
Intelligent test enhances test efficiency.
Pneumatic clamping and releasing decrease test time and errors.
Test procedure requires no manual drawing and mark, data and parameters are displayed by LCD.
System identifies, calculates test data automatically, requires no manual intervention.
Test stops automatically, results are displayed by multifold units, micro-printer prints results.
* Principle - at the beginning of the test, choose a test method, estimate an initial mass and delta-m.
Test, if the first specimen is failure, decrease the mass of the falling dart by decreasing poise of delta-m.
If the first specimen is not failure, add the mass of the falling dart by increasing poise of delta-m.
Test as the same.
In brief, increase or decrease the delta-m according to whether the former specimen is failure or not.
After 20 specimens, calculate the total number of failure specimens N.
If N equals to 10, test over.
If N is less than 10, add specimen and continue to test until N is equal to 10.
If N is more than 10, add specimen and continue the test until the number of non-failure specimen is 10.
Then calculate the test results according to special formula.
* Operation demo Power on - choose test method - estimate initial impact mass and delta-m - increase or decrease the delta-m according to impact result - ystem calculates automatically - estimate whether the results satisfy the condition of stopping - display test results - print test results - test over.
* Technical data.
Test method: A or B.
Test range: Method A: 50-2000g; Method B: 300~2000g.
Test accuracy: 0.1g (0.1J).
Test condition: 23 deg 50%RH (Standard).
Specimen clamping: pneumatic.
Specimen size: 150mm x 150mm.
Power: 220V AC, 50Hz.
Net weight: 70kg.
Dimension: Method A: 500(L)mm x 450(B)mm x 1320(H)mm; Method B: 500(L)mm x 450(B)mm x 2160(H)mm.
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