Abstract: The clamping mechanism was classified according to the number of templates, driving source, the transmission forms, and the mold structure, their function, construction, and performance characteristics were discussed. Four typical mechanisms, double-toggle, full hydraulic straight pressure, tie-barless, and two-plate were analyzed on their structural characteristics and application. The development trend of the typical clamping structure was also presented.

Key words: clamping mechanism, toggle, all-hydraulic direct pressure, tie-barless, two-plate, injection molding machine