Continuous Wet Treatment Roll Shielding for Flexible Printed Circuits
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Solution Overview
Problem
Conventional continuous wet treatment apparatuses suffer from treatment liquid leakage that adheres to the workpiece, deteriorating its quality.
Innovation Solution
A wet treatment apparatus design featuring a pair of rolls and treatment-liquid shield members positioned to nip the workpiece transversely, with shield members wider than the rolls, and an auxiliary chamber with additional rolls, to prevent liquid adhesion by guiding and redirecting leaked liquid away from the workpiece.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If treatment liquid is applied to the workpiece in a continuous wet treatment apparatus, then the workpiece receives necessary treatment, but treatment liquid leaks and adheres to the workpiece, deteriorating its quality
Solution Approach 1:
A pair of treatment-liquid shield members is introduced as an intermediary element between the treatment liquid source and the workpiece. These shield members intercept and redirect the treatment liquid that would otherwise leak and adhere to the workpiece, thereby protecting the workpiece quality without interfering with the necessary treatment process
Solution Approach 2:
The harmful effect of treatment liquid adhesion is extracted and separated from the workpiece by introducing shield members that specifically target and remove the leaking liquid path, allowing the workpiece to receive treatment while excluding the harmful adhesion effect
2Reliability
If shield members are positioned to redirect leaked liquid, then liquid adhesion is prevented, but the device structure becomes more complex
Solution Approach 1:
The treatment-liquid shield members are designed as thin, flexible barriers that can be easily positioned and adjusted. This design minimizes the structural complexity added to the apparatus while effectively performing the liquid redirection function, as thin films require less supporting structure compared to rigid barriers
Solution Approach 2:
The shield members serve as simple intermediary elements that perform a single function (redirecting liquid) without requiring complex mechanisms, controls, or multiple components, thereby adding minimal structural complexity while effectively solving the liquid adhesion problem
Data Source
AI summary
A wet treatment apparatus is configured to treat a continuously moving sheet-shaped workpiece and includes a wet treatment tank including a side surface portion having a first slit, a pair of rolls located outside the wet treatment tank, the pair of rolls being spaced apart from the first slit and being arranged in such a manner as to nip the workpiece in a transverse direction, and a pair of treatment-liquid shield members disposed on a side opposite to a side on which the wet treatment tank is disposed with the pair of rolls interposed between the pair of treatment-liquid shield members and the wet treatment tank in a movement direction of the workpiece. In a direction parallel to a width of the first slit, a width of the shield member is larger than a width of the roll.