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The Production Rubber Friction Test Machine is tailored to meet the needs of routine friction evaluation of production rubber parts and small scale development programs. Typical contact configurations are ball on rubber flat and plate on rubber hemisphere. Thin rubber sheet samples may be tested by clamping them against a rubber backing. Other items such as threads, gloves and seals may be tested by the provision of suitable holders.
The TE 75P was developed under licence from Rubber Consultants, part of the UK Malaysian Rubber Producers Research Association. The control unit includes a SLIM 2000 Serial Link Interface Module and Windows based software for control and data acquisition.
The fixed upper sample is loaded by dead-weights onto a sample mounted on a single axis linear traverse. As the lower sample moves the friction force on the upper sample is measured.
The TE 75P has a trunnion and gimble mounted loading beam, counterbalanced both to give a neutral balance and to bring the centre of gravity onto the contact plane. Load is applied by dead weights in a range from 0.1 N to 20 N.
The action of lowering the load beam activates a test cycle. The program can also introduce a dwell between load application and movement. This dwell period can be crucial in determining the start-up friction in elastomers as the adhesive forces will increase the contact area over time.
The loading beam is restrained by a strain gauge force transducer in a sliding link. This link ensures that only the tangential component of force in the contact (the friction force) is measured even with the large deflections associated with rubber test pieces.
The speed of the lower specimen is defined by a variable speed motor on 1 mm pitch lead-screw traverse slide. The load, speed and number of cycles are user selected. The stroke is pre-set.
The TE 75P has COMPEND 2000 PC based control and data acquisition features. This is provided by an integrated SLIM 2000 Serial Link Interface Module and Windows based software running on a host PC.
The software is designed for easy user access to all test set-up parameters. Tests are defined by the number of cycles, speed and load (manually set). The friction coefficient is displayed on an auto-scaling graph against time as the test progresses. This graph may be downloaded to a printer at the end of a test. The same data may be stored to hard disc for calculation and graphical presentation in standard spreadsheet programs.
The software determines the peak friction at the start of the test and calculates the mean friction over the remainder of the cycles.
| Stroke Length: | 20 mm (fixed) |
| Speed: | 0.2 to 2 mm/s |
| Cycles: | User selected up to 9 |
| Dwell (time delay): | User selected in seconds up to 3600 seconds |
| Load Range: | 0.1 to 20 N in 0.1 N steps |
| Temperature: | ambient |
| Interface: | PLINT SLIM 2000 Serial Link Interface Module |
| Software | PLINT Windows based setpoint control and data acquisition software |
| Motor: | 2.9 W dc |
| Electricity: | 220/240 V, single phase, 50 Hz, 720 W |
| 110 V, single phase, 60 Hz, 720 W | |
| PC and Printer: | Minimum Specification |
| Bench-mounting machine: | 380 mm x 370 mm x 290 mm high, 20 kg |
| Bench-mounting controller: | 530 mm x 320 mm x 240 mm high, 10 kg |
| Packing specifications: | 0.21 m3, GW 52 kg, NW 30 kg |
Copyright © 2002 Plint Tribology Ltd.