Pumping device and method for conveying viscous media, in particular adhesives

Abstract

The invention includes a pumping device (1, 1a) and a method for conveying a viscous medium, in particular adhesives. The pumping device (1, 1a) has a cylinder unit (20) as well as a piston unit (22), which is at least partially contained within the cylinder unit (20), with the cylinder unit (20) and the piston unit (22) together forming a conveying means (2), which operates according to the reciprocating piston principle. The pumping device (1, 1a) further has at least one drive shaft (7) communicating with a motor, via which drive shaft (7) the cylinder unit (20) and the piston unit (22) are rotationally movable about a common axis, and the pumping device (1, 1a) also has a forced guide being mechanically coupled with the conveying means (2), by means of which forced guide the rotating movement of the conveying means (2) is convertible into an alternating forward and return stroke of the piston unit (22) for the purpose of pumping the respective viscous medium.

Description

CLAIM OF PRIORITY[0001]The present application claim priority to German Application DE 10 2014 224 539.7, filed Dec. 1, 2014, which is incorporate by reference.FIELD OF THE INVENTION[0002]The present invention relates to a pumping device as well as to a method for conveying highly viscous or viscous media, respectively, in particular adhesives.BACKGROUND OF THE INVENTION[0003]Devices or methods, respectively, of the type previously mentioned can be used, for instance, in order to convey hot glue from a storage container and provide it for a labeling operation. In this context, devices are known that can be placed upon a container and that supply glue to a glue applicator roll and / or to further means via appropriate pipe connections.[0004]A heatable pump for viscous media is, for instance, known from DE 35 42 848 A1. The pump disclosed there has a piston rod, a pump piston, and also a riser pipe arranged concentrically to the piston rod. A heating element is helically guided around t...

AI Technical Summary

Benefits of technology

[0006]It is therefore the object of the invention to provide both a pumping device and a labeling device with such a pumping device, which are characterized by a simple structure and low-maintenance operation. It is further the object of the present invention to provide a method for conveying viscous medium, which method is simple and which can be carried out with no or minimal complications.

[0010]The pumping device according to the invention furthermore comprises at least one drive shaft, which is in communication with a motor, via which drive shaft the cylinder unit and the piston unit are rotationally movable about a common axis. The drive shaft can have a vertical orientation during operation of the pumping device. In order to rotatingly drive the drive shaft, the motor can be designed as a gear motor, for instance, and in particular as an electric motor. Other drive variants are also conceivable, for instance, hydraulic drives or the like. In comparison to the linear actuators used in the known pumping devices, such motors require less maintenance effort and have less signs of wear. An appropriate coupling can be arranged between the motor and the drive shaft.

[0026]Since the conveying means of the pumping device is embedded in the viscous medium or in the adhesive, respectively, during the operation of the pumping device, the viscous medium or the glue, respectively, can serve as a lubricant for the moved parts of the conveying means. The wear is thus further reduced.

Problems solved by technology

Since such devices require a complex mechanism for generating a linear movement of the pump piston, they are technically elaborate to carry out.

In addition, the devices known from the prior art require regular and frequent maintenance in order to prevent a failure of the pump.

Images