Segmented Wheel Printing Device Independent Drive Synchronization

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Solution Overview

Problem

Existing devices for printing on hollow bodies face challenges in achieving high print quality due to limitations in positioning accuracy of rotating components, leading to suboptimal ink transfer and registration during the printing process.

Innovation Solution

The mandrel wheel and conveyor wheel are equipped with dedicated drives separate from the segmented wheel, allowing for independent control and synchronization of rotational speeds to ensure precise positioning and registration of printing units, thereby enhancing print quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the mandrel wheel and conveyor wheel share a common drive with the segmented wheel, then the device complexity is reduced, but the positioning accuracy and print quality deteriorate

Engineering Contradiction:
Improvedrive system complexityVSAvoidpositioning accuracy
Core Design Contradiction:
Device complexityVSManufacturing precision

Solution Approach 1:

The drive system is segmented into separate dedicated drives for the mandrel wheel, conveyor wheel, and segmented wheel, allowing each component to be controlled independently for precise positioning during the printing process

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The dedicated drives enable dynamic speed adjustment and synchronization of the mandrel wheel and conveyor wheel relative to the segmented wheel, optimizing positioning accuracy for ink transfer while maintaining production flexibility

Inventive Principle:
Principle #15Dynamics

2Device complexity

If the rotational speeds of the mandrel wheel and conveyor wheel are not synchronized, then the control system is simpler, but the registration accuracy and print quality worsen

Engineering Contradiction:
Improvecontrol system complexityVSAvoidregistration accuracy
Core Design Contradiction:
Device complexityVSManufacturing precision

Solution Approach 1:

The control system incorporates feedback mechanisms that monitor the rotational positions and speeds of the mandrel wheel, conveyor wheel, and segmented wheel, automatically adjusting speeds to maintain precise synchronization and registration accuracy throughout the printing process

Inventive Principle:
Principle #23Feedback

Data Source

PatentUS11400700B2Device for printing on hollow bodies
Publication Date: 2022.08.02 KOENIG & BAUER AG
  • US11400700B2 patent drawing
  • US11400700B2 patent drawing
  • US11400700B2 patent drawing

AI summary

A device for printing on hollow bodies includes a segmented wheel. A system is used for sequentially supplying the hollow bodes to the periphery of the segmented wheel. That system includes at least one conveyor wheel and one mandrel wheel. The conveyor wheel, the mandrel wheel, and the segmented wheel are arranged in a transport direction of the hollow bodies. A plurality of driving elements are arranged on the periphery of the conveyor wheel, and a plurality of holding elements are arranged on the periphery of the mandrel wheel. Each holding element receives a respective hollow body to be printed in cooperation with the segmented wheel. The mandrel wheel and the conveying wheel each have their own drive, each of which drive is separate from a drive of the segmented wheel.