End Micro Leak Tester (MLT)
Single head off-line MLT system. On and off line modules are available.
- High Sensitivity
- High Sampling Rate
- Low Maintenance, Low Running Costs
- Class Leading Performance
- Low False Rejects
- Intelligent Sampling for Complete Protection
- Real Leakage Rates Displayed
- Flexible Installation and Modular Expansion
Fast, practical and effective sample testing for micro-leaks in converted ends, with low maintenance and low running costs.
Note: A recent Canmaker magazine article quoted Sencon's MLT as capable of detecting leak rates of 0.05cc per second. The actual specification is for leak detection of 0.05cc per 10 seconds. This represents ten times better capability than quoted in the magazine. All MLT leak rate specifications are quoted in the industry standard form of cc's per ten seconds.
3-head on-line MLT sampling system. On and off line modules are available.
Failure to detect leaks in lids leads to massive re-checking jobs or customer complaint. 100% light testing with Sencon’s on-press End Light Tester Package ELTP will find leaks that have a detectable light path through the fault. However, faults such as rivet cracks or more complex fractures may not allow light to pass and will therefore go unnoticed. An additional test is needed,using gas flow to indicate the presence of these very small or hidden leaks.
MLT is a real time testing unit designed to detect what are commonly called ‘micro-leaks’. The system works at the limit of dry seal capability, while at the same time avoiding product damage. This means that a careful balance is maintained between applying sufficient pressure to open up metal fractures, while ensuring the tested ends remain suitable to re-enter production. Sencon believe that MLT achieves the best mix of sampling speed and test sensitivity, offering the most practical and economic solution to detecting micro-leaks in can lids.
- On-line testing up to 2.4% of production
- Acceptable ends can re-enter production in stick form or take-away conveyor
- Easily adapted to test a wide range of end sizes
- Robust construction with low maintenance
Avoiding False Rejects - All lids rejected by a tester demand extra attention to confirm the leak and initiate the appropriate action. False rejects therefore waste time through unnecessary investigation. Based on detailed research, MLT is set by default to work at realistic detection thresholds in order to avoid rejecting good product.
Intelligent Sampling of All Belt Pockets - Sampling from the line at regular fixed intervals could mean that ends are tested from only one group of belt pockets, as the belt and the sampler fall into synchronisation. To avoid this, the on-line MLT has an option called “walk the belt”, which monitors and varies the sampling rate to ensure that lids from every belt pocket are sampled. In this mode, the average sample rate is 15 lids per minute, but overall protection against faulty product is effectively greater.