Cold Plate Recessed Fusion Structure for Burr-Free Coolant Flow
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Solution Overview
Problem
The formation of burrs during the heat-fusion of a resin cover to a base plate in cold plates can lead to narrowed refrigerant flow paths and potential clogging, affecting cooling performance and potentially damaging attached electronic equipment.
Innovation Solution
A recessed portion is formed on the base plate surface to contain the molten resin, with a roughened inner surface and optional resin reservoirs to anchor the resin cover, enhancing bonding and preventing burr formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a resin cover is heat-fused to a base plate, then manufacturing cost is reduced and assembly is simplified, but burrs form inside and outside the resin cover causing cooling performance deterioration and potential equipment damage
Solution Approach 1:
The base plate surface is segmented into a recessed portion and a non-recessed portion, creating distinct zones for resin containment and heat fusion. This segmentation prevents molten resin from spreading uncontrollably while maintaining the cost advantage of resin covers.
Solution Approach 2:
The recessed portion acts as an intermediary structure between the base plate and resin cover, providing a controlled environment for heat fusion. It mediates the molten resin flow to prevent burr formation while enabling effective thermal bonding.
2Device complexity
If a resin cover is heat-fused to a base plate, then assembly complexity is reduced, but burrs form that may clog refrigerant flow paths or peel off and fall onto electronic equipment
Solution Approach 1:
The recessed portion is pre-formed on the base plate before the heat fusion process. This preliminary structural preparation guides the molten resin flow during heat fusion, preventing burr formation from the outset while maintaining simple assembly procedures.
Solution Approach 2:
The potential harmful effect of molten resin overflow is converted into a beneficial containment mechanism. The recessed portion utilizes the natural flow of molten resin to fill the recessed area, transforming what would be a defect (overflow) into a feature (controlled containment that prevents burrs).
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 solution effectively suppresses burr formation, maintaining refrigerant flow and preventing equipment damage by containing molten resin within the recessed area, thereby improving cooling performance and reliability.
Implementation Method 1
the resin cover is heat-fused to the base plate on an inner surface of the recessed portion
Implementation Method 2
a first roughened portion having a plurality of micropores may be formed on the inner surface of the recessed portion, and the resin cover may be heat-fused to the base plate at the first roughened portion
Data Source
AI summary
A cold plate includes: a metal base plate having a first surface, a second surface on a side opposite the first surface, and fins disposed in parallel on the first surface; and a topped cylindrical resin cover covering the fins. The first surface has a recessed portion recessed toward the second surface. The topped cylindrical resin cover is heat-fused to the metal base plate on an inner surface of the recessed portion.