Automated Sleeve Exchange Mechanism for Flexographic Printing
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Solution Overview
Problem
Existing printing machine technologies require manual exchange of sleeves and adapters, which is time-consuming, costly, and inefficient, as they need to be adapted for each specific tool and can be fragile, leading to increased engineering effort and machine downtime.
Innovation Solution
A method for automatically exchanging sleeves and adapters using a printing tool handling unit with a coupling interface, allowing for temporary coupling, clamping, and separation of tools without manual intervention, enabling quick and simple exchange of sleeves and adapters within the printing machine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual exchange of sleeves and adapters is used, then the printing machine can be operated with simple equipment, but the exchange process is time-consuming and requires machine stoppage
Solution Approach 1:
The system enables automatic self-service exchange of sleeves and adapters through the printing tool handling unit. The handling unit autonomously performs coupling, transport, clamping, and uncoupling operations without manual intervention, transforming the manual exchange process into an automated self-service system that eliminates machine stoppage and significantly reduces exchange time
Solution Approach 2:
The printing tool handling unit is pre-positioned and pre-configured with coupling interfaces before the exchange process begins. The unit is ready to immediately couple with the printing tool, and the separation unit with clamping devices is prepared in advance to receive and clamp the tool, enabling continuous operation without waiting for manual preparation
2Extent of automation
If specialized handling devices with transport shafts are used, then automatic handling is achieved, but the devices become bulky and expensive
Solution Approach 1:
The invention extracts and eliminates the bulky transport shaft component from traditional handling devices. Instead of using a large transport shaft system, the solution directly couples the handling unit to the printing tool's existing coupling interface, transporting the tool along its rotation axis without requiring intermediate shaft structures, thereby simplifying the device while maintaining automation
Solution Approach 2:
The printing tool handling unit is designed with universal coupling interfaces that can handle different printing tools (printing cylinders, anilox rollers, blade beams, impression cylinders, guide rollers, and pressure rollers). This multi-functional design eliminates the need for specialized handling devices for each tool type, reducing overall system complexity and cost while maintaining full automation capability
3Reliability
If handling devices are adapted for specific printing tools, then precise handling is achieved, but engineering effort and cost increase
Solution Approach 1:
The handling device uses standardized coupling interfaces that match the printing tool's existing interfaces, eliminating the need for custom adaptation for each tool type. The same handling unit can reliably handle printing cylinders, anilox rollers, blade beams, impression cylinders, guide rollers, and pressure rollers, achieving precise handling across different tools without increasing engineering effort
Solution Approach 2:
The handling system is segmented into independent functional modules: the printing tool handling unit with coupling interface for attachment, the transport function along the rotation axis, and the separation unit with clamping devices. This modular segmentation allows the system to maintain reliability through standardized interfaces while simplifying manufacturing and reducing engineering effort through reusable components
Data Source
AI summary
A method is provided for automatically exchanging a sleeve (18a) of a printing tool (14, 16, 18, 22, 24) mounted in a printing machine (12), in particular a flexographic printing machine, by means of a printing tool handling unit (28) comprising a coupling interface (36). In one step of the method the printing tool handling unit (28) is temporarily coupled to a coupling interface (46) located at the end of a shaft (54, 56, 58, 60) of the printing tool (14, 16, 18, 22, 24) with its coupling interface (36). In a further step, the printing tool handling unit (28) transports the printing tool (14, 16, 18, 22, 24) to a separation unit (78) comprising at least one clamping device (80, 82, 84) and places the printing tool (14, 16, 18, 22, 24) in the clamping device (80) of the separation unit (78). The printing tool (14, 16, 18, 22, 24), in particular a sleeve (18a) of the printing tool (14, 16, 18, 22, 24), is clamped by the clamping device (80), and the printing tool handling unit (28) separates the shaft (54, 56, 58, 60) from the sleeve (18a) by pulling the shaft (54, 56, 58, 60) out of the sleeve (18a) while the sleeve (18a) is clamped in the clamping device (80).