Abstract

In order to prevent the material (52) from being pressed through the press plate seal between press plate (2) and surrounding barrel (50) by means of a press plate (2) when emptying a barrel (50) in which viscous material (52) is supplied, a two-stage construction is used in accordance with the invention: a) of the barrel (50). After the press plate (2) has come to a standstill, the conveying piston (24) can thus be guided in the direction of the bottom of the press cylinder (22), i.e. in the direction of the press plate (2), and the material (52) can thereby be pressed through the conveying piston (24) into the conveyer line (4) with a pressure, which can also be significantly higher than the maximum pressure with which the press plate seal between the press plate (2) and the inner circumference of the barrel (50) may be pressurised, which, however, does not pose a problem for the much more accurate press cylinder seal between the conveying piston (24) and the press cylinder (22).

IPC Classes  ?

• B67D 7/64 - Arrangements of pumps power operated of piston type

Abstract

The invention relates to a pump unit (1) for emptying a reservoir container (101) filled with a fluid or paste-like material (111) and in particular under vacuum, which reservoir container is a component of a storage device (100), wherein the pump unit (1) comprises a delivery pump (1.1) which has an elastic pump element (3) that is movable relative to the delivery pump housing (2), a delivery pump drive (8), and a control for controlling at least all movable components of the pump unit (1).

IPC Classes  ?

• F04B 15/02 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
• F04B 23/02 - Pumping installations or systems having reservoirs
• F04B 43/02 - Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
• F04B 43/073 - Pumps having fluid drive the actuating fluid being controlled by at least one valve
• F04B 7/02 - Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated

Abstract

When emptying a barrel (50) in which viscous material (52) is transported by means of a pressing plate (2), the material (52) is to be prevented from being pressed through the pressing plate seal between the pressing plate (2) and the surrounding barrel (50). According to the invention, this is achieved by means of a two-stage implementation: the rear face of the pressing plate (2) is connected to a pressing cylinder (22) in which a delivery piston (24) is sealingly guided, said delivery piston having a correspondingly smaller end face than the pressing plate (2). In addition, nonreturn valves (19) are arranged in the pressing plate (2) in the region radially within the pressing cylinder (22), said nonreturn valves allowing the material (52) to flow only in the direction of the delivery piston (24) but not in the opposite direction when the pressing plate (2) is pressed in the direction of the base (50a) of the barrel (50). When the pressure plate (2) is at a standstill, the delivery piston (24) can thus be guided in the direction of the base of the pressing cylinder (22), thus in the direction of the pressing plate (2), and the material (52) can thereby be pressed into the delivery line (4) by the delivery piston (24) with a pressure that can even be substantially higher than the maximum pressure with which the pressing plate seal between the pressing plate (2) and the inner circumference of the barrel (50) is permitted to be loaded but which does not present a problem for the much more precisely producible pressing cylinder seal between the delivery piston (24) and the pressing cylinder (22).

IPC Classes  ?

• B67D 7/64 - Arrangements of pumps power operated of piston type
• B29B 13/02 - Conditioning or physical treatment of the material to be shaped by heating

Abstract

For bubble free emptying of pasteous substances from drum-shaped containers these are pumped out through a drum follower plate placed onto the paste. In a refinement, the drum follower plate is provided hollow with a lower grid plate and before the beginning of the pumping out process through evacuation of the hollow intermediary space air, possibly present under the drum follower plate, is sucked from there into the intermediary space, so that the pump scooping from below the grid plate only feeds pasteous material right from the beginning.

IPC Classes  ?

• B65D 83/76 - Containers or packages with special means for dispensing contents for dispensing fluent contents by means of a piston
• B67D 7/70 - Arrangements of pumps of two or more pumps in series or parallel

Goods & Services

Machines for transporting and measuring liquid or viscous substances; machines for use in the electrical industry, particularly for gluing and casting electric components. Engineers' services.