EXCELLENT SEAL INTEGRITY AND UNRIVALLED POSITIONING ACCURACY
For portion packs that must meet the highest quality and safety standards, the integrity of the seal is crucial for a long shelf life of the product. Precise coordination of the sealing time, the sealing pressure, the sealing temperature and the sealing medium (material) allows for seals that are perfectly tight yet peelable, if desired.
With Rychiger's patented one-stroke punching & sealing technology, the punching and heat-sealing processes are combined in a single assembly. Our customers value the compact design of such machines, as well as their unrivalled accuracy when it comes to the positioning of the lid foil on the capsule. This technology also allows for the production of inside-cuts, which have become an important packaging design feature.
Our customers operate in competitive markets where costs are key. That is why our machines are designed to punch lids directly from foil roll stock. In order to reduce the punching scrap, the roll stock is fed through the machine at an angle to the capsule transport system. This reduces foil scrap by up to 30% compared with conventional, parallel-running lid foil transport systems.
For certain applications, it might be more economical to use pre-punched lids. For such systems, we offer a number of tried and tested solutions, including automated lid feeders where a specially designed vacuum gripper takes up the individual lids and places them on the capsules. In such machines, the sealing process is performed in a second, separate process module.
Where two plastic parts with a relatively large cross-section are to be joined together, we use ultrasonic sealing. With this method, the heat required for sealing is only generated inside the thermoplastic sealing layer through vibration, which has the added advantages that the sealing faces are not contaminated by (liquid or powder) product residue that could impair the quality of the seal.
We all know how paper filters work, and these are now also found in capsule systems. In our machines, the filter paper is cold-formed and then attached to the capsule (by ultrasonic or heat sealing).
Certain products must be filled and packed under a shield gas atmosphere. The most common gas used here is nitrogen, and we offer machines with sealed sections filled with this inert gas, whereby flow-optimised channels minimise the nitrogen consumption.