Foams take a pounding to determine fatigue
An
IDM Instruments product story
Edited by the Engineeringtalk editorial team
Jun 15, 2004
A novel foam-pounding machine determines fatigue by constant-load pounding, in accordance with the ISO3385 standard.
A novel foam-pounding machine determines fatigue by constant-load pounding, in accordance with the ISO3385 standard.
This massive 160kg machine provides a means of assessing the service performance of flexible cellular materials of the latex and polyether urethane types used in load-bearing upholstery.
The test can be performed on both standard size test pieces cut from stock material and to shaped components.
The foam constant load pounding machine consists mainly of a plane platen that is capable of supporting the test piece and has holes to allow air to escape from the test piece.
The indenter has a smooth, but unpolished surface, and applies a force of 750+/-20N during load cycle.
It is the indenter support mounting which supports the indenter, except when the full force load is absorbed by the test piece.
The foam pounding machine also includes a regulator, which allows you to increase or decrease the pressure valve.
The machine is operated through the control panel, at which the operator can select how the test will run - either via timer or counter.
It is easy to operate, making the machine very user friendly.
The new look foam constant load pounding machine is designed differently to the previous model.
The indenter is positioned inside a polycarbonate cabinet, and the bottom half of the machine is securely closed up, with a built in control panel.
The principle of the test is repeated indention of a test piece by an indenter smaller in area than the test piece.
The maximum load reached during each cycle is 750N and the machine is run for 80,000 continuous load cycles.
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