Cap application removal force

Specification

A system was required to measure the push-on force and removal force of an injection-moulded cap from a new design of oil can.

The innovative design of the cap was opened by applying a downward pressure to the back, so flipping up the front portion allowing the oil to be poured. Both the push-on and pull-off tests needed to be completed without removing the oil can from the fixture.

Solution

Although the application was relatively straight forward, there was a risk of damaging the force gauge if not positioned effectively. The bespoke fixturing and stand reverse feature on the force gauge meant that the application could be carried out without the need to use a more complex computer-controlled system.

The test was set-up by sliding a can, into the lower fixture, while locating a cap, resting on the can's neck, into the self-centering swivel fixture attached to the gauge. This upper fixture was driven down onto the cap until a 10% load drop was detected.

Then, with the push-on force captured in the gauge memory as the compressive maximum, the 'reverse on break' feature of the gauge automatically drove the stand up. Subsequent engagement of the upper fixture extension bars with the cap enabled cap removal, pull-off force capture into gauge tensile memory and test completion.

System

  • UltraTest (superseded by the MultiTest-dV series)
  • AFG 1000 N Force Gauge
  • Stand Reverse Cable
  • Location Fixture
  • Cap Load / Unload Fixture

See also

Cosmetic packaging pull-off test

Cosmetic packaging pull-off test

A bench-top testing system was required to repeatably test the pull-off force on a variety of cosmetic containers. The system needed to allow a relatively high volume of containers to be tested with the minimum level of training required for users. Mecmesin's solution avoided the risk of damaging the loadcell by excessive torque on tightening the collet grip, and the lipstick barrel was first inserted in the grip and then connected to the gauge by a flexible chain-link.

Ice cream container lid closing effort

Ice cream container lid closing effort

Food packaging made from thermoformed plastics and intended for freezing, requires testing to ensure optimum functionality when closing and sealing the container. The closing effort of the lid is measured by using a motorised force tester controlled by software together with a custom-designed fixture to hold standard-sized ice cream tubs. In addition the ‘top-load’ crush strength of the container itself can also be tested on the same machine to guarantee it is rigid enough to avoid buckling and spillage when the lid is applied.

Mecmesin develops Combi Cork-i Extraction Tester for leading Scottish whisky

Mecmesin develops Combi Cork-i Extraction Tester for leading Scottish whisky

To improve the quality and storage of a premium product, the R&D team at a leading Scottish whisky maker needed to optimise the design of their bottle stoppers. They decided that the strength and performance of their reusable stoppers could be ensured by systematic testing of the characteristics of both portions of the stoppers. Working closely with the R&D team, Mecmesin developed the Combi Cork-i Extraction Tester, an innovative multi-function cork extraction testing system that tests both phases of de-corking synchronously.

Greek beauty product manufacturer guarantees production quality by updating to Mecmesins digital torque testers

Greek beauty product manufacturer guarantees production quality by updating to Mecmesin's digital torque testers

A manufacturer of a wide range of skin, hair-care, make-up and sun-care products based in Greece needed to replace their outdated torque testers with up-to-date digital torque testers to guarantee production quality and to ensure their products remained sealed. Mecmesin supplied the company with two Tornado 10N.m digital torque testers, which have the ability to test tamper-evident closures, an intrinsic part of their specification.

  • Isabel Thomas
  • Product Info
  • English
  • Created 24 Jan 2019
  • Modified 07 May 2019
  • Hits 33