Prestrained Transfer Roller for Uniform Lacquer Distribution
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Solution Overview
Problem
Existing lacquer transfer devices fail to achieve a uniform lacquer layer on work surfaces due to inadequate distribution and contact mechanics between the transfer roller and the work surface.
Innovation Solution
A device comprising a transfer roller with an elastically deformable tire, ring-elements, and a cylindrical support-body, where the tire forms a circumferential outer contact surface with depressions, and a nozzle for lacquer dispensing, allowing for even lacquer distribution and adaptation to the work surface, ensuring uniformity through prestraining and fluid-tight connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid transfer roller is used, then structural stability is maintained, but uniform lacquer distribution on the work surface deteriorates
Solution Approach 1:
The transfer roller uses a flexible tire made of elastomeric material that can deform to conform to the work surface topology. This flexible shell allows the roller to adapt to surface irregularities while maintaining structural stability through the rigid support body underneath, thereby achieving both structural stability and uniform lacquer distribution.
Solution Approach 2:
The tire is prestrained in the axial direction by arranging ring-elements at a predefined distance from each other, which changes the physical parameters of the tire material. This prestraining creates controlled elastic deformation that enhances the tire's ability to conform to the work surface, improving lacquer uniformity while maintaining overall structural integrity.
2Adaptability or versatility
If the transfer roller is made elastically deformable, then adaptation to work surface improves, but structural stability deteriorates
Solution Approach 1:
The transfer roller is segmented into distinct functional components: a rigid support body for structural stability and a flexible tire for surface adaptation. This segmentation allows each component to perform its specialized function without compromising the other, enabling both adaptability and structural stability to coexist.
Solution Approach 2:
The transfer roller combines different materials with complementary properties - a rigid support body material for structural stability and an elastomeric tire material for elastic deformation and surface adaptation. This composite structure integrates the advantages of both material types, achieving both adaptability and structural integrity.
3Manufacturing precision
If prestraining is applied to the tire, then lacquer distribution uniformity improves, but device complexity increases
Solution Approach 1:
The tire is prestrained in advance during assembly by positioning ring-elements at a predefined axial distance from each other. This preliminary action of prestraining prepares the tire in its optimal operational state before use, ensuring uniform lacquer distribution during operation without requiring complex control systems or adjustments during the actual lacquer transfer process.
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 device ensures a uniform lacquer layer on the work surface by prestraining the tire and using elastically deformable components to adapt to the surface, preventing mechanical damage and enhancing lacquer distribution and curing uniformity.
Implementation Method 1
the first ring-element, the second ring-element, and the tire are each elastically deformable
Implementation Method 2
the middle-section of the tire between the first and second ring-elements is prestrained in the axial direction
Data Source
AI summary
A device for a lacquer transfer includes a transfer roller mounted at and rotatable relative to a frame. The roller includes a cylindrical support-body, first ring-element, second ring-element, and a tire including a middle-section forming a circumferential outer contact surface with depressions, the roller configured to roll with the outer contract surface on a work surface of a workpiece for transferring lacquer from the outer contact surface and the depressions to the work surface. The tire includes two annular end-sections attached to a cylindrical outer shell of the support-body resulting in two axially separated and circumferentially extending connections, the tire, connections, and outer shell of the support-body being fluid-tight. The first and second ring-elements are in the first cavity seated on the support-body at a distance in an axial direction of the roller from one another and the middle-section of the tire between the first and second ring-elements is prestrained in the axial direction.