Hydraulic Adapting Sleeve for Flexographic Printing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional adapting sleeves for flexographic printing machines fail to maintain a fixed and invariable radial distance between the rotary core and the printing sleeve, leading to unsatisfactory printing quality due to vibrations and irregular pressure distribution, especially at high speeds.
Innovation Solution
An autonomous adapting sleeve with an integrated hydraulic device that uses manually actuatable hydraulic pads to securely fasten and release from the rotary core, dampening vibrations and maintaining a stable radial distance through radial expansion and contraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an adapting sleeve is used to supplement the diameter of the rotary core, then different printing developments can be achieved, but the radial distance between the rotary core and printing sleeve becomes variable due to vibrations
Solution Approach 1:
The patent introduces an adapting sleeve as an intermediary component between the rotary core and the printing sleeve. This adapter sleeve with elastic material and hydraulic pads serves as a mediator that absorbs vibrations and maintains stable radial distance, resolving the contradiction between achieving different printing developments and maintaining stable radial distance.
Solution Approach 2:
The patent applies beforehand cushioning by incorporating elastic material and hydraulic pads into the adapting sleeve structure before operation. These elements预先 provide vibration absorption and shock damping capabilities, preventing radial distance variation caused by vibrations during high-speed printing operations.
2Productivity
If the rotation speed of the printing sleeve increases, then productivity improves, but printing quality deteriorates due to vibratory resonance
Solution Approach 1:
The patent converts the harmful vibratory resonance into a beneficial damping effect. The elastic material and hydraulic pads, which could be seen as softening the connection, actually absorb the harmful vibrations and convert them into harmless thermal energy, allowing high-speed operation without compromising printing quality.
Solution Approach 2:
The patent changes the physical parameters of the connection between rotary core and printing sleeve by introducing elastic material with specific durometer (40-60 shore) and hydraulic fluid pressure (100-500 psi). These parameter changes enable the system to maintain stability at high rotation speeds while preserving printing quality.
3Ease of operation
If a pneumatic system is used to mount the adapting sleeve, then the mounting is simple and lightweight, but the connection is not rigid enough to prevent vibrations
Solution Approach 1:
The patent employs composite materials by combining elastic material (40-60 shore durometer) with rigid hydraulic pads and metal components. This composite structure provides both the ease of pneumatic mounting and the rigidity needed to prevent vibrations, resolving the contradiction between mounting simplicity and connection strength.
4Object-affected harmful factors
If a hydraulic or mechanical connection is used to secure the adapting sleeve, then vibration resistance improves, but the system becomes more cumbersome and heavier
Solution Approach 1:
The patent uses hydraulics in a clever way by incorporating small hydraulic pads within the adapting sleeve structure. These hydraulic elements provide strong vibration resistance and rigid connection when pressurized (100-500 psi), but add minimal weight compared to full mechanical hydraulic systems, as they only require small chambers and seals rather than complete hydraulic actuators.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces vibrations and maintains consistent printing quality by providing a secure, vibration-dampening connection between the adapting sleeve and the rotary core, allowing for reliable operation at high speeds without external pneumatic or hydraulic systems.
Implementation Method 1
pressurizing the hydraulic pads causes a radial deformation of the inner cylindrical member
Implementation Method 2
pressurizing the hydraulic pads causes a radial deformation of the inner cylindrical member
Implementation Method 3
The hydraulic pads also balance the pressure exerted by the inner cylindrical member on the peripheral surface of the rotary core in the areas of the hydraulic pads so as to maintain the adapting sleeve centered with respect to the rotary core of the printing machine
Data Source
AI summary
An adapting sleeve for flexographic printing machines defines an exterior surface appropriate for the mounting of a printing sleeve. The adapting sleeve has an outer cylindrical member made of a rigid material and surrounding an inner cylindrical member that defines a cylindrical passage for mounting of the adapting sleeve on a rotary core of a flexographic printing machine. The adapting sleeve has some ring separators that are mounted between the outer cylindrical member and the inner cylindrical member and spaced longitudinally from each other. The adapting sleeve has a hydraulic device that includes hydraulic pads arranged between the inner surface of the inner cylindrical member and the ring separators and connected by a hydraulic circuit to a pressurization element that is actionable manually from the exterior of the adapting sleeve.