Let's face it, the hot bar soldering process isn't usually quick.  It takes whatever time it takes, whether that's 5 seconds per cycle or 25 seconds.  But one way to get more volume through your hot bar soldering equipment is to decrease the time between soldering cycles.  The time during which an operator is unloading a finished product and loading the components for the next cycle, is essentially wasted time.  By using a rotary indexer with indential nests on each side of the table, you can have the operator loading and unloading product WHILE the soldering cycle is taking place.  Take a look at the two position rotary indexer offered by Advanced Integrated Technologies on this page http://www.a-i-t.com/hot-bar-soldering-equipment/two-position-rotary-indexer and you'll see how efficient this method can be.  http://www.a-i-t.com/hot-bar-soldering-equipment