Resin Coupler Electrode Mounting for Spark Prevention
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Solution Overview
Problem
Conventional electrode mounting structures in surface treatment apparatuses for cylinder inner-peripheral surfaces often experience spark generation and adhesion at metal threaded portions, making it difficult to detach electrodes and deteriorating maintenance performance, especially in circulating plating apparatuses with higher current density.
Innovation Solution
The electrode mounting structure employs a resin coupler member with threaded portions engaged with either the electrode or electrode holder member, preventing spark generation and adhesion by using a combination of metal and resin materials, and incorporating a resilient member to facilitate easy detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal threaded portions are used to attach the electrode to the electrode holder member, then the electrode can be securely mounted, but spark generation and adhesion occur making it difficult to detach the electrode
Solution Approach 1:
The invention uses a resin coupler member with threaded portions instead of metal threaded portions to connect the electrode and electrode holder member. The resin material prevents spark generation and adhesion while maintaining sufficient mounting strength through its mechanical engagement properties, thus resolving the contradiction between secure mounting and easy detachment.
Solution Approach 2:
The resin coupler member acts as an intermediary component between the metal electrode and the metal electrode holder member. This intermediate resin element prevents direct metal-to-metal contact that causes sparking and adhesion, while still providing the necessary mechanical connection for secure mounting and easy detachment.
2Device complexity
If metal threaded portions are used for electrode mounting, then the structure is simple, but spark generation occurs reducing maintenance performance
Solution Approach 1:
By introducing a resin coupler member as an intermediate component, the invention prevents spark generation at the threaded portions while maintaining a relatively simple mounting structure. The resin material eliminates the harmful electrical discharge that occurs with metal-to-metal contact, thereby improving maintenance performance without significantly increasing structural complexity.
3Productivity
If high current density is applied in circulating plating apparatus, then processing efficiency is improved, but spark generation and adhesion at threaded portions increase
Solution Approach 1:
The resin coupler member serves as an electrical insulator between the metal electrode and electrode holder member, preventing spark generation even under high current density conditions. This intermediary resin element blocks the electrical discharge path that would otherwise cause harmful sparking and adhesion, allowing high-current processing to proceed without these adverse effects.
Data Source
AI summary
An electrode mounting structure of a surface treatment apparatus in which a metal electrode is disposed so as to oppose to an inner-peripheral surface of a cylinder, the electrode and the cylinder are energized in a state where treatment liquid is interposed between the electrode and the cylinder inner-peripheral surface so as to perform pre-plating or plating to the cylinder inner-peripheral surface, and the metal electrode is detachably attached to a metal electrode holder member. The structure includes a resin coupler having a threaded portion engaged with a threaded portion formed on the electrode holder member.