Flow-on Roller Coating System with Metered Deposition
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Solution Overview
Problem
Conventional roller coating systems are cumbersome and messy, with uneven distribution of coating due to excess drippage and lack of even application.
Innovation Solution
A flow-on roller coating system with a depositor that includes a contact region and discharge outlets directly on the roller, utilizing a one-way valve to meter coating application and reduce drippage, and a low-pressure pump for efficient coating distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional dipping and rolling method is used to apply coating to the roller, then the coating can be applied to the roller surface, but the distribution of coating is uneven and excess drippage occurs
Solution Approach 1:
The coating application process is segmented into distinct zones: a flood coating zone where coating is applied generously, and a metering zone where the excess coating is controlled and removed. This segmentation allows the roller to receive adequate coating while preventing drippage through the controlled transition between zones.
Solution Approach 2:
The roller itself acts as an intermediary between the coating source and the final application surface. By applying coating to the roller in a controlled manner and using the roller's rotation and pressure against the contact surface, the system achieves even distribution without direct drippage onto the work surface.
2Productivity
If conventional tray dipping method is used, then coating can be applied to the roller, but the process is messy and time-consuming
Solution Approach 1:
The manual mechanical process of dipping and rolling off excess coating is replaced with a controlled fluid delivery system. Coating is pumped through channels and deposited directly onto the roller surface in a controlled manner, eliminating the messy tray dipping process and reducing application time.
Solution Approach 2:
The coating application process becomes continuous rather than intermittent. The pump delivers coating continuously through the flood zone and metering zone as the roller rotates, maintaining constant coating application without the start-stop nature of traditional dipping methods, thereby improving productivity and cleanliness.
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 system minimizes drippage and enhances even coating distribution by direct contact and controlled coating release, improving the consistency and efficiency of the coating process.
Implementation Method 1
a one-way valve separating the intake chamber from the discharge chamber, the one-way valve being configured to open and close a flow path of coating from the intake chamber to the discharge chamber
Implementation Method 2
a low-pressure pump for efficient coating distribution
Implementation Method 3
the depositor includes an engagement portion having a contact region in direct contact against the exterior surface of the roller
Data Source
AI summary
A flow-on roller coating system includes a roller frame, a roller rotatably supported by the frame, and a depositor operatively coupled to the frame. The depositor is configured to receive a supply of coating and deposit the coating onto an exterior surface of the roller. The depositor may include an engagement portion having a contact region in direct contact against the exterior surface of the roller, and one or more outlet openings in the engagement portion are located within a perimeter of the contact region. The outlets are configured to discharge coating onto the exterior surface of the roller, which is penetrated into the roller. The depositor may include an intake chamber and a discharge chamber which are separated by a one-way valve. The one-way valve may help to meter the amount of coating discharged from the depositor body, which can help to reduce excess coating flow to reduce drippage.