Macro Sensors in Pennsauken, N.J., reports its LVDT linear position sensors are replacing proximity sensors in the automated control systems of hot air heat staking machinery used in making thermoplastic assemblies.
In this process, super-heated air melts plastic studs, softening them so they can be formed into specific shapes when driven by a cold stake. This method of direct contact allows two dissimilar pieces of plastic and other materials to be joined.
The stake is pneumatically actuated, and Macro Sensors' LVDT position sensors give feedback to the absolute position of the stake depth, ensuring repeatability and robust stake joints, according to the company. Output signals are fed into a programmable logic controller that alerts operators is limits fall outside of parameters, to ensure correct alignment.
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