Prestrained Transfer Roller for Uniform Lacquer Coating
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Solution Overview
Problem
Existing lacquer transfer devices often fail to achieve a uniform lacquer layer on work surfaces due to inadequate distribution and pressure control during the transfer process.
Innovation Solution
A device featuring a transfer roller with a cylindrical support body, elastically deformable ring elements, and a tire with depressions, which is mounted on a frame and driven by a drive unit, allowing for controlled lacquer dispensing and transfer, with pressure management in ring cavities to ensure even distribution and prevent mechanical damage to the work surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the transfer roller simply rolls on the work surface to transfer lacquer, then the transfer process is simple, but the lacquer layer uniformity is poor
Solution Approach 1:
The tire is designed to be elastically deformable with prestraining in the axial direction, allowing it to dynamically adapt its shape during rolling. This dynamic deformation capability enables the tire to maintain consistent contact pressure and lacquer distribution across the work surface, resolving the contradiction between simple rolling operation and uniform lacquer transfer.
Solution Approach 2:
The patent changes the physical state and mechanical properties of the tire by prestraining it in the axial direction and allowing elastic deformation during operation. This parameter change enables the tire to self-adjust its contact characteristics with the work surface, achieving uniform lacquer layer thickness without complex control systems.
2Stability of the object's composition
If the tire is made rigid for stable structure, then structural stability is improved, but lacquer distribution uniformity deteriorates
Solution Approach 1:
The tire is designed with differentiated properties: it has overall structural stability from its mounted configuration but local elastic deformability in the contact region. The prestraining in the axial direction creates local stress distribution that enables uniform pressure application during rolling, while the rigid support structure maintains positional stability.
Solution Approach 2:
The transfer roller assembly functions as a composite system combining the rigid support structure with the elastically deformable tire. This composite construction allows the rigid parts to provide structural stability while the elastic tire material ensures uniform lacquer distribution through controlled deformation during rolling.
3Productivity
If pressure is increased to improve lacquer transfer, then transfer efficiency is improved, but risk of mechanical damage to work surface increases
Solution Approach 1:
The elastically deformable tire with prestraining dynamically adjusts its contact pressure with the work surface during rolling. The elastic deformation absorbs excess pressure, ensuring sufficient lacquer transfer while preventing mechanical damage to the work surface through automatic pressure regulation.
Solution Approach 2:
The prestraining of the tire in the axial direction creates a cushioning effect before contact with the work surface. This pre-applied stress distribution acts as a buffer that prevents concentrated high-pressure points, enabling efficient lacquer transfer without damaging the work surface.
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 controlling pressures within the ring cavities, reducing wrinkles and enhancing the uniformity and quality of the lacquer layer.
Implementation Method 1
The first and second ring elements are arranged in the main cavity and seated on the support body at a predefined distance in an axial direction of the transfer roller from one another such that the middle section of the tire between the first and second ring elements is prestrained in the axial direction
Implementation Method 2
The device comprises a control unit or a controller adapted to control a first pressure in the first ring cavity and a second pressure in the second ring cavity
Implementation Method 3
The transfer roller is configured to roll with the outer contact surface on a work surface of a workpiece for transferring the lacquer from the outer contact surface and from the depressions to the work surface of the workpiece
Data Source
AI summary
A device for a lacquer transfer is disclosed having a transfer roller, the transfer roller includes a cylindrical support body, a first ring element, a second ring element, and a tire, wherein the tire comprises a middle section forming a circumferential outer contact surface with several depressions. The transfer roller is configured to roll with the outer contact surface on a work surface of a workpiece for transferring lacquer from the outer contact surface and from the depressions to the work surface of the workpiece. The tire includes two annular end sections, which are attached to the support body resulting in two axially separated and circumferentially extending connections. The tire, the connections, and the outer shell of the support body are fluid-tight and arranged such that a fluid-tight main cavity is formed between the tire and the support body. The first and second ring elements are arranged in the main cavity and seated on the support body at a predefined distance in an axial direction (A) of the transfer roller from one another.