Alu Expanding Plunger
Alubility AG’s aluminum expanding plunger is produced in a combined process of punching and deep drawing and is the only one of its kind to be thermally treated.
The aluminum expanding plunger will be placed in the cartridge after filling it and is slightly expanded – done!!!
This guarantees that the cartridge is completely airtight. Tens of millions of cartridges sealed/closed with our product each year are impressive proof of this. There is no need for a desiccant bag and a final lid on the cartridge anymore, which means a much more productive filling process.
The thermal treatment exclusively done by Alubility AG gives the aluminum expanding plunger an exceptionally high ductility (elasticity). This leads to a soft and elastic stretch process in the closing operation. The result is an unmatched tightly sealed cartridge, which is of utmost importance for the storage capacity of moisture-sensitive and drying-loving adhesives and sealants.
In the picture you can see on the right the self-speaking effect of expanding a non-heat-treated aluminum plunger.