Printing Press Distributor Roller Motor Control

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Solution Overview

Problem

Existing printing press systems require expensive controllable clutches to switch between operating modes, which increases costs and complexity.

Innovation Solution

A method and system using a third motor to replace the second clutch, allowing for cost-effective operation by using less expensive electric motors, and employing a single clutch for rotational driving in the first mode, with the third motor either co-rotating without power or braking the first motor to achieve gear wheel preloading and minimize rotational fluctuations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If controllable clutches are used to switch between operating modes, then the printing press can operate in multiple modes (printing and maintenance), but the cost and device complexity increase significantly

Engineering Contradiction:

Improveoperating modesVSAvoidclutch system

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical clutch system with an electrical motor control system. A third motor is introduced to drive the distributor roller during maintenance operations, eliminating the need for a second controllable clutch. The switching between printing and maintenance modes is achieved through electrical control of motor engagement rather than mechanical clutch operation, thereby reducing mechanical complexity while maintaining operational versatility.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If expensive controllable clutches are used, then mode switching is achieved, but the manufacturing cost increases

Engineering Contradiction:

Improvemode switching capabilityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent employs a third motor as a more cost-effective alternative to expensive controllable clutches. Electric motors are generally less expensive and more readily available than precision mechanical clutches with controlled engagement capabilities. This substitution reduces the manufacturing cost while achieving the same functional outcome of mode switching between printing and maintenance operations.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Device complexity

If a single clutch is used for rotational driving, then device complexity is reduced, but the ability to control rotational driving in different modes is limited

Engineering Contradiction:

Improveclutch systemVSAvoidrotational driving control

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent makes the third motor serve multiple functions: it drives the distributor roller during maintenance operations and can also engage with the first motor during printing operations to provide additional rotational driving capability. This multi-functional motor replaces the need for a second dedicated clutch, reducing device complexity while maintaining the adaptability to control rotational driving in both printing and maintenance modes.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS8534191B2Printing press and method for operating a printing unit of a printing press

Publication Date: 2013.09.17 HEIDELBERGER DRUCKMASCHINEN AG

AI summary

A method for operating a printing unit of a printing press includes operating the printing unit in a first operating mode, for example printing operation, and in a second operating mode, for example maintenance operation. In the first operating mode, a printing unit cylinder and a distributor roller are driven rotationally by a first motor and the distributor roller is driven axially by a second motor. In the second operating mode, the distributor roller is driven rotationally by a third motor and the distributor roller is driven axially by the second motor. A printing press for carrying out the method is also provided.