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Method for operating a printing press pump assembly

A printing machine and assembly technology, applied to printing machines, general parts of printing machinery, printing, etc., can solve problems such as prolonging refitting time, and achieve the effects of avoiding excessive reduction of viscosity, prolonging service life, and avoiding excessive decline

Active Publication Date: 2019-04-23
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pump has to be flushed out, which prolongs the rebuilding time

Method used

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  • Method for operating a printing press pump assembly
  • Method for operating a printing press pump assembly
  • Method for operating a printing press pump assembly

Examples

Experimental program
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Effect test

Embodiment Construction

[0034] figure 1 A printing press 1 for lithographic offset printing on paper is shown partially. The detail shows a varnishing device and components of a printing press pump assembly in the form of a varnish supply of the printing press 1 , with which the method according to the invention is carried out. In this case, the first liquid circuit 22 comprises a first container 2 which contains a reservoir for a liquid 3 , in particular a liquid to be printed, for example a printing varnish. The first container 2 is connected to a basin 6 via an inflow line 4 and a return line 5 . The basin 6 is open upwards and is part of a consumer device, in particular a paint dosing device.

[0035] Arranged in the inflow line 4 is an inflow pump 7 which sucks the liquid 3 from the first container 2 into the basin 6 during printing operation. Arranged in the return line 5 is a return pump 8 which sucks unused liquid 3 from the basin 6 back into the first container 2 during printing operation...

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PUM

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Abstract

In a method for operating a printing machine pump assembly having a liquid circulating loop (22) and a positive displacement pump (inflow pump 7) integrated into the liquid circulating loop and having an electric motor (20). Physical parameters of liquid (3) in the liquid circulating loop (22) and motor parameters of the electric motor (20) are measured; and viscosity of the liquid (3) can be automatically calculated according to the two measurement results.

Description

technical field [0001] The invention relates to a method for operating a pump unit of a printing press comprising a liquid circuit and a pump integrated therein with an electric motor. Background technique [0002] DE 19930684 C2 describes a method for treating viscous media in which an electric centrifugal pump is used. Determine the viscosity of the medium by detecting the load of the pump. Here, the load on the pump is detected by detecting the current consumption of the pump. Changes in viscosity lead to changes in current consumption. [0003] EP1284370A1 describes a method for producing an adjustable, substantially constant volume flow by means of a rotary pump. It follows from this that in the method no complex adjustment of the supply quantity is required and no associated sensors are required. The dynamic viscosity of the liquid to be delivered is determined by measuring the motor current of the pump by setting a fixed test speed of the rotor and determining the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F33/10B41F31/08
CPCB41F31/08
Inventor T·沃尔夫
Owner HEIDELBERGER DRUCKMASCHINEN AG
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