| 摘要 |
The invention relates to an improved pasty material volumetric dosing device, comprising a dosing chamber (4) having a piston (5) that can be moved by a pasty material (M) that is introduced from one end (4a) of said chamber from a position (5A) to a position (5B) and subsequently actuated by a pressurized fluid (F) which is introduced from a second end (4b) to return to said position (5A) by moving a volume of material (M) defined between positions (5A y 5B). Said material is expelled through the end (4a) adjacent to an opening in a location housing a valve body (7) that can turn and adopt a first position communicating an inlet (1) of said material with said chamber (4), and, alternately, said chamber with a wide notch. The fluid (F) introduced through the second end (4b) of the chamber presses the piston (5) that returns once again to the first outlet (2) position (5A), said valve having a large recessing (70), which, in a second position of the valve, leaves a large portion of the location (7) hollow and open towards a packaging line (B) through said notch (2). |
