Self-Locking Gasket for Ceramic Core Channel Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Investment casting is a time-consuming and expensive process, particularly when precise dimensions are required, as it involves challenging core processing operations such as rework of ceramic cores, which can lead to foreign material lodging in channels and damage to delicate features, often resulting in costly scrapping of components.
Innovation Solution
A protection system comprising a gasket sized and shaped to self-lock within channels between ceramic core features, preventing foreign material from lodging and reducing damage during core processing operations, which includes determining the geometrical characteristics of the channel and adjacent features to fabricate a custom-fit gasket for positioning within the channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If rework operations are performed on ceramic cores to remove or add material, then the desired shape and features can be achieved, but foreign material can lodge in channels and damage delicate features
Solution Approach 1:
Protective caps are placed on channels before rework operations begin, preventing foreign material from entering channels during material removal or addition processes. This preliminary protective action eliminates the need for delicate post-rework cleaning operations.
Solution Approach 2:
The protective cap acts as an intermediary barrier between the rework environment (where foreign material is generated) and the ceramic core channels (which must remain clean). This intermediary element isolates the delicate channel structures from harmful foreign material during processing.
2Adaptability or versatility
If delicate ceramic core features are created for intricate cooling passages, then the component functionality is improved, but the features are prone to breaking or deformation during formation and rework
Solution Approach 1:
Protective caps are installed before rework operations to cushion and protect delicate ceramic features from mechanical damage. The caps absorb impacts and prevent direct contact between tools and fragile channel structures, eliminating the need for overly conservative handling procedures.
Solution Approach 2:
By placing protective caps before rework begins, the system prepares the ceramic core in advance to withstand subsequent processing operations. This preliminary protection enables technicians to perform necessary rework operations without fear of damaging delicate features.
3Reliability
If protective measures are implemented during core processing, then damage to ceramic features is reduced, but the processing time and complexity increase
Solution Approach 1:
Protective caps are placed on channels once during setup, before rework operations begin. This single preliminary action protects all subsequent operations without requiring repeated protective measures, minimizing time loss while ensuring continuous protection throughout the rework process.
Solution Approach 2:
The protective cap system is self-contained and requires minimal intervention during rework operations. Once installed, the caps automatically protect channels without requiring additional actions from technicians, eliminating the need for repeated protective measures or complex protective procedures during each rework step.
Data Source
AI summary
A protection system for preventing foreign material from lodging in a channel between and/or damage to adjacent ceramic core features during a core processing operation is disclosed. The system includes a gasket sized and shaped to self-lock within the channel and prevent foreign material from lodging within the channel during the core processing operation. A method may include determining a geometrical characteristic of the channel and adjacent ceramic core feature; fabricating a gasket to fit and self-lock within the channel; positioning the gasket within the channel; and performing the core processing operation. The gasket prevents the foreign material from lodging in the channel, reducing subsequent damage to the ceramic core compared to the channel without the gasket.