| 摘要 |
Disclosed is a reciprocating pump for liquid and pasty media, especially molten plastic materials, essentially comprising a cylindrical tube and a piston that is movable therein at least in an axial direction and is provided with at least one flow duct (18) which encompasses a check valve. The aim of the invention is to create a reciprocating pump that can be integrated as easily as possible into a mixing device. Said aim is achieved by means of the characteristics described in claim 1, according to which the front of the piston is provided with a piston-sealing area, the front being in relation to the direction of flow. The piston-sealing area is bridged in the direction of flow by means of the at least one flow duct including the check valve and is provided with a forced mixing area at the rear between the piston and the cylindrical tube, the rear being in relation to the direction of flow. The forced mixing area is formed by spaced-apart hollow spaces which extend outward within the cylindrical tube, at least in the axial range of movement of the piston, and spaced-apart hollow spaces that face inward inside the piston. |
