Demesia Zigzag Tester

The Demesia Zigzag Tester is a professional device used to test the flexural resistance of materials such as rubber, leather, synthetic leather, and shoe soles.

Application

The Demesia Zigzag Tester is primarily used to simulate the repeated bending that materials experience during actual use. Through continuous bending fatigue testing, it observes the degree of cracking in the material to understand or compare its durability. This is crucial for evaluating the fatigue resistance of materials such as rubber and leather, helping manufacturers optimize product design and material selection.

Standards

ISO 132 ：Rubber and elastomers — Determination of fatigue life and fatigue strength in flexure (flexometer method)

ISO 6943：Rubber and elastomers — Determination of tensile stress-strain properties

ASTM D430 ：Standard Test Method for Hardness of Rubber by Means of a Durometer

ASTM D430-B ：Standard Test Method for Hardness of Rubber (Durometer Type B)

DIN 53522-1 ：Rubber and elastomers — Tensile testing — Part 1: General requirements

DIN 53522-2：Rubber and elastomers — Tensile testing — Part 2: Vulcanized rubbers

DIN 53522-3 ：Rubber and elastomers — Tensile testing — Part 3: Thermoplastic elastomers

JIS K6301：Rubber and rubber products — Physical test methods

ASTM D813：Standard Test Method for Fatigue of Vulcanized Rubber and Thermoplastic Elastomers by Repeated Tension

BS 903：Methods of Test for Rubber and Elastomers

Features

Modular test head design (3 interchangeable jaw types)

Real-time waveform display of bending force

Self-diagnosis system with 20+ error codes

Emergency stop with electromagnetic braking

Multi-axis programmable control

Technical Parameters

Parameter	Specifications
Sample size	Usually rectangular, e.g. (108±0.5)×(70±0.5)mm or (154×25±1)×(6.3±0.15)mm, etc.
Distance between upper and lower clamps	The larger distance and smaller distance may be 76±0.2mm and 19±0.2mm, etc. respectively
Clamp stroke	Generally 57±0.5mm, etc.
Reciprocating frequency	Usually 300±10 cycles/min or 60~300r/min±10r/min, etc.
Stretching stroke	0~100mm (adjustable), etc.
Number of test groups	6 groups, 12 groups, 24 groups, 48 groups or 16 groups, etc. It depends on the model and manufacturer
Counting method	Each group of samples is counted independently, and the machine stops automatically after reaching the set number of times
Volume and weight	The volume may be about 340×620×756mm or 350×600×700mm, etc.; the weight may be about 68kg or 78kg, etc.
Power supply	Usually AC220V, 50/60Hz, etc.

Accessoriess

1. One set of standard laser cutting dies

2. One set of product instructions, one-year warranty certificate, and one "CNAS" internationally accredited calibration report

3. One set of repair tools

Test Procedures

1. Sample Pre-treatment

According to the standards corresponding to the test materials (rubber, leather, synthetic leather, shoe soles, etc.) (e.g., ISO 132. JIS K6545), cut the test specimens (usually rectangular, such as (108±0.5)×(70±0.5) mm); place the specimens in a standard environment (23±2℃, 50±5% RH) for at least 24 hours to ensure the specimens are in a stable state.

2. Equipment Pre-check

Connect to a 220V AC 50/60Hz power supply, and check that the equipment's clamps and transmission parts are in good condition; start the equipment for 1-2 minutes without load to confirm that there is no jamming, abnormal noise, or other abnormalities.

3. Sample Clamping

Clamp the pre-treated specimens into the multiple sets of clamps on the equipment (supporting 6/12/24 test groups, etc.), ensuring that the specimens are flat and evenly stressed; adjust the distance between the upper and lower clamps (e.g., larger distance 76±0.2mm, smaller distance 19±0.2mm), and fix the specimens to prevent loosening during testing.

4. Parameter Setting

Set the test parameters through the equipment control panel:

Reciprocating frequency (usually 300±10 cycles/minute, or 60~300 cycles/minute)

Target number of test cycles for each set of specimens (set separately, e.g., 10000 cycles)

Clamp stroke (generally 57±0.5mm)

Confirm the parameters and save the settings.

5. Start Testing

After re-checking that the sample clamping and parameters are correct, start the equipment; the equipment will perform reciprocating bending tests according to the set parameters, simulating the repeated bending scenarios in the actual use of the material.

6. Test Monitoring and Termination

Observe the state of the specimens in real time during the test: if the specimens show obvious cracking, breakage, or other failure, the test for the corresponding group can be manually terminated; if the set number of cycles is reached, the equipment will automatically stop.

7. Data Recording and Completion

Record the actual number of test cycles for each set of specimens, the degree of cracking of the specimens (e.g., cracking level), and other results; turn off the equipment power, remove the specimens, clean the clamps and workbench, and complete the test.

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