Closed-End Electrode for Uniform Bottomed Hole Plating
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Solution Overview
Problem
Existing surface treatment devices for bottomed holes in casting molds face challenges in achieving uniform surface treatment at the bottom part due to insufficient surface area, leading to inadequate adhesion and thinner film formation, requiring longer treatment times.
Innovation Solution
A surface treatment device with a closed-end electrode configuration, featuring a double pipe structure and flow-through holes, ensures uniform electrolytic treatment solution flow and power distribution, allowing for efficient electroplating at the bottom part of the hole by maintaining solution circulation and controlling current values between the large and small-diameter electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an open-end electrode configuration is used, then electrolytic treatment solution can flow through the electrode, but the surface area at the bottom part is insufficient leading to poor adhesion and thin film formation
Solution Approach 1:
The patent inverts the conventional open-end electrode configuration by using a closed-end electrode. The closed end faces the bottom part of the bottomed hole, providing sufficient surface area for uniform electroplating. Flow-through holes are provided in the electrode body to enable electrolytic treatment solution to reach the bottom part, thereby solving both the flow requirement and the film thickness uniformity issue.
2Manufacturing precision
If treatment time is extended to achieve uniform film thickness at the bottom part, then film quality improves, but productivity decreases
Solution Approach 1:
By inverting the electrode configuration to a closed-end design, the patent achieves uniform film thickness at the bottom part without extending treatment time. The closed end provides consistent surface area for plating, and the flow-through holes ensure adequate solution supply, thereby maintaining high productivity while achieving uniform film quality.
Solution Approach 2:
The patent changes the geometric parameters of the electrode by providing flow-through holes with specific dimensions and patterns. This parameter optimization ensures adequate electrolytic treatment solution flow to the bottom part during electroplating, achieving uniform film thickness without requiring extended treatment time.
3Manufacturing precision
If a closed-end electrode is used, then surface area at the bottom part increases improving adhesion, but solution flow through the electrode is blocked
Solution Approach 1:
The patent applies the porous materials principle by providing flow-through holes in the closed-end electrode body. These holes create a porous-like flow path that allows electrolytic treatment solution to pass through the electrode and reach the bottom part of the bottomed hole, thereby maintaining solution flow while using a closed-end configuration.
Solution Approach 2:
The flow-through holes act as intermediaries that mediate between the closed-end structure and the solution flow requirement. The holes provide passage for the electrolytic treatment solution to reach the bottom part while the closed end maintains sufficient surface area for uniform electroplating.
4Device complexity
If conventional electrode configuration is used, then device complexity is low, but adhesion state at the bottom part deteriorates
Solution Approach 1:
The patent inverts the conventional open-end electrode to a closed-end electrode configuration. This simple structural inversion provides sufficient surface area at the bottom part for good adhesion, while flow-through holes are added to maintain solution flow capability.
Solution Approach 2:
By incorporating flow-through holes in the closed-end electrode, the patent creates a structure that resembles porous materials in its flow capability. This allows the electrode to maintain low complexity while achieving reliable adhesion at the bottom part through adequate solution supply.
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
This configuration significantly reduces treatment time while maintaining solution flow and achieving uniform film thickness at the inner wall surfaces, enhancing the adhesion state and reducing maintenance needs for the casting mold.
Implementation Method 1
power is applied across the electrode device and the inner wall surface of the bottomed hole
Implementation Method 2
an electrolytic treatment solution is made to flow through a space between an outer peripheral surface of the electrode and the inner wall surface of the bottomed hole and a space inside the hollow electrode
Data Source
AI summary
An electrode device is provided with a closed part facing a bottom part of a bottomed hole when inserted inside the bottomed hole, and a flow through hole linking the inside and outside of the electrode device is formed in the electrode device. When surface treatment is implemented on the inner wall surface of the bottomed hole, the hollow electrode device is inserted into the inside of the bottomed hole, the electrolytic treatment solution is made to flow through the space inside the bottomed hole, and power is applied across the electrode device and the inner wall surface of the bottomed hole. The closed part faces the bottom part of the bottomed hole as an electrode across a prescribed surface area; therefore, electroplating at the bottom part of the bottomed hole proceeds to the same extent as other sites.