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Constant-stress/strain flexometer
FT-1250
Japan
12 months
Rubber, vulcanized — Determination of temperature rise and resistance to fatigue in flexometer testing: Constant-stress/strain flexometer. This machine determines change in complex modulus of elasticity E', E", tan6 and heating rate of rubber during the thermal fatigue process. Standard: ISO 4666, JIS K 6265,...
Ueshima Constant-stress/strain flexometer Model FT-1250
1. INTRODUCTION
This machine determines change in complex modulus of elasticity E', E", tan6 and heating rate of rubber during the thermal fatigue process.
It employs hydraulic servo mechanism in the drive system and in addition to measurement based on constant strain of the conventional Flexometer (Goodrich Flexometer) it also allows measurement based on constant load (constant stress).
It incorporates a needle type thermocouple (temperature sensor) for detecting sample's temperature.
Temperature in the center of sample is determined by inserting the needle thermocouple into the sample
The data of tanδ, E', E" and creep are displayed in the form of graph on the personal computer's screen while conducting measurement, allowing you to monitor the measuring process.
SPECIFICATIONS
Standard: ISO 4666/JIS K 6265
Type: Compression Flexometer
Test piece:
(1 )Shape : Cylindrical
(2 )Dimensions:φ 30.0× 25mm、φ 17.8× 25mm(Option for FT-1250)
Preloading :
(1 )Method : By hydraulic cylinder with servo control
(2 )Load : 50 to 500N
Dynamic Loading:
(1 )Method : By hydraulic cylinder with servo control
(2 )Mode : (A)Constant strain amplitude(B)Constant stress amplitude
(3 )Amplitude: (A)1 to 6.5mmp-p (B)50 to 1500Np-p
Load Detector: 5000N rating load cell
Displacement Detector: 20mm stroke differential transformer
Frequency: 5 to 50Hz
Temperature Range of Thermostat Chamber: 50 to 150℃(50 to 100℃±1℃、 100 to 150℃±3℃)
Measuring of Testpiece Temperature: By a needle type thermocouple continually position-controlled at the center of the interior of the testpiece
Testpiece Supply: One testpiece, manual operation one by one
Measurement:
(1)Output Data
(a) Temperature of testpiece
(b) Creep
(c) Visco-elastic parameters:
・ Storage modulus(E’)
・ Loss modulus(E’’)
・ Loss factor(tanδ )
(2)Indication: Graphic display
Electric Supply:
Main part of Flexometer: Single phase AC220V15A
Hydraulic power Unit: 3-phase AC 380V 25A
Cooling water Requirement for Hydralic Power Unit:
Temperature :Lower than 28℃、
Flow rate : 20ℓ/min
Dimensions Main part of Flexometer: 750(W)× 835(D)×1470(H)mm
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