Printing Mechanism Mandrel with Radial Arm Synchronization
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Solution Overview
Problem
The existing printing mechanisms face inefficiencies in mounting and replacing sleeves due to their large size and weight, requiring significant operator time and leading to decreased productivity and increased costs, as they need to be replaced with different mandrels for varying print lengths and diameters.
Innovation Solution
A printing mechanism with a mandrel and sleeve support members that have radially extending arm portions with a moving mechanism and interlock system, allowing for easy insertion and removal of sleeves without the need for air blowout ports, enabling the use of sleeves with different inner diameters and reducing the necessity for multiple mandrels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a thin plate cylinder (sleeve) with the same axial length as the mandrel is mounted and printing plates are attached to it, then the printing mechanism can operate, but the sleeve becomes heavy and large requiring significant operator time for replacement
Solution Approach 1:
The mandrel is divided into multiple sections along its axial length, with printing plates mounted on different segments. This allows individual segments to be replaced independently rather than replacing the entire sleeve, significantly reducing replacement time and operator effort.
Solution Approach 2:
The printing plates are designed to be dynamically replaceable on the mandrel segments through a mechanical attachment system. This enables quick changeover between different printing configurations without requiring complete sleeve replacement, improving productivity while reducing downtime.
2Ease of operation
If compressed air is sent into the mandrel to blow out air from holes on the surface for mounting the sleeve, then the air layer reduces insertion resistance, but the requirement for air blowout facilities increases device complexity
Solution Approach 1:
The air blowout system is completely removed from the mandrel design. Instead of using compressed air to facilitate sleeve mounting, the invention uses a purely mechanical attachment system where printing plates are directly mounted to mandrel segments through physical engagement features, eliminating the need for complex pneumatic facilities.
Solution Approach 2:
The pneumatic system is replaced with a mechanical mounting system. The attachment mechanism uses direct mechanical engagement between the printing plates and mandrel segments, substituting the air pressure-based mounting system with a solid mechanical connection system that is simpler and more reliable.
3Productivity
If the diameter of the sleeve is increased to accommodate larger print lengths, then the printing capability is improved, but the weight and size of the sleeve increase making it heavier and more difficult to handle
Solution Approach 1:
The mandrel is segmented into multiple sections along its axial length, allowing the printing capability to be increased by adding or extending segments rather than increasing the diameter of a single large sleeve. This maintains manageable weight and size while achieving larger print lengths through extended axial coverage.
Solution Approach 2:
Instead of increasing the diameter of the sleeve to accommodate larger print lengths, the solution extends the printing capability in the axial dimension by adding more mandrel segments. This dimensional shift allows larger print capacity without the penalty of increased weight and diameter, making the system easier to handle.
4Adaptability or versatility
If multiple mandrels are prepared for different print colors and lengths, then the printing versatility is improved, but the cost and complexity of the system increases
Solution Approach 1:
The segmented mandrel design creates a universal platform where different printing configurations can be achieved by arranging printing plates on the segments in various patterns. A single segmented mandrel can accommodate multiple print colors and lengths by reconfiguring the plate arrangement, eliminating the need for multiple dedicated mandrels and reducing system complexity.
Data Source
AI summary
A printing mechanism 1 including a mandrel 2, and a tubular sleeve 3; wherein the mandrel comprises a main body and sleeve support members 6, a plurality of the sleeve-support members being arranged on the main body at intervals in the axial direction; and wherein the sleeve-support member has a plurality of arm portions 7 extending radially so as to support the sleeve from an inside thereof, and moving mechanisms 8 for moving tip vicinities of the arm portions inward/outward in the radial direction; and wherein the sleeve-support member has an interlock mechanism 9 for synchronously driving each moving mechanism of the sleeve support members, the tip vicinities of the arm portions being engaged with the inner surface of the sleeve or released from the engaged inner surface of the sleeve by the synchronous motion of the tip vicinities of all arm portions inward/outward with the interlock mechanism.