TE plastic closure bridge strength by push-out test

The motorised test stand with digital force gauge allowed the test to be semi-automated so that it was very simple for operators to conduct. Thanks to the special double-loading fixture it was possible for an operator to load a second cap whilst the first was being tested, thereby reducing testing time.

The cap would be placed onto the plunger which was then pushed up to engage the tamper-proof ring over a fixed lip. The fixture was rotated to align the plunger with the force gauge. The gauge was then driven down forcing apart the cap and tamper-proof ring and recording the peak load. In total, 6 systems were supplied to Alcoa to cope with the volume of testing required on each production line.