Piston pump for the dosed transport of liquid and pasty media, in particular for the micro metering and injection molding machine with a piston pump

摘要

The present invention discloses a piston pump (10) for the metered feeding of a liquid, comprisinga liquid chamber (11), which via a suction channel (14) can be filled with the liquid and by means of a dispensing channel (15) for outputting of the liquid fluid can be connected;a in the fluid chamber (11) arranged intake piston (17); anda in the fluid chamber (11) arranged ejecting pistons (18); wherein the piston pump (10) has the following features:the suction piston (17) is arranged between a first position, a second position, and a third position within the fluid chamber (11), where the suction piston (17) in its first position, closes the intake conduit (14), in the second position the intake conduit (14) is released, and in the third position, releases the dispensing channel (15);the discharging piston (18) is arranged between a first position and a second position within the fluid chamber (11), where the discharging piston (18) in its first position the intake conduit (14) is released, and in its second position the intake conduit (14) closes;by displacing the aspiration plunger (17) of its second position in the direction of the third position in the case of, in the first position, the discharging piston (18) in the liquid is sucked out of the fluid chamber (11); andby displacement of the discharging piston (18) in the direction of its second position in the third position in the intake piston, the liquid through the dispensing channel (15) is pressed.n="24"