Cylindrical Casting Structure Sealing Design

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Solution Overview

Problem

Existing structures for producing castings often experience leakage of molten metal during pouring, especially when the pressure of the molten metal is high, due to gaps between joined structures.

Innovation Solution

A cylindrical structure for producing castings is designed with a cylindrical main body having a body part and a female joint connected consecutively, where the inner diameter of the female joint is equal to or larger than the outer diameter of the body part. The structure includes a body inside cover layer covering the inner face of the body part and an outside cover layer covering the outer face of the female joint, preventing leakage by ensuring a tight seal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple structures are joined together to form a cylindrical body, then the productivity and flexibility of casting production is improved, but gaps between joined structures cause leakage of molten metal

Engineering Contradiction:

Improvecasting production efficiencyVSAvoidleakage prevention

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The cylindrical structure is divided into multiple segments that can be joined together to form the complete casting mold. This segmentation allows for flexible assembly and disassembly, improving productivity while maintaining the ability to prevent leakage through proper joint design with coating compositions applied at the joints.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A coating composition is applied as an intermediary substance at the joints between structures. This coating fills and seals the gaps between joined structures, preventing leakage of molten metal while allowing the structures to be joined for productive casting operations.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the inner diameter of the female joint is made equal to or larger than the outer diameter of the body part, then the ease of assembly is improved, but the sealing performance may deteriorate

Engineering Contradiction:

Improveassembly easeVSAvoidsealing performance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The coating composition is applied in advance to the joint surfaces before assembly. This preliminary application ensures that when the structures are joined with ease due to the diameter relationship, the coating is already in position to provide sealing and prevent leakage.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The dimensions are specifically designed with the inner diameter of the female joint being equal to or larger than the outer diameter of the body part. This parameter change facilitates easy assembly while the coating composition compensates for any potential sealing issues that might arise from this dimensional relationship.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250091119A1Structure for producing casting

Publication Date: 2025.03.20 KAO CORP

AI summary

A cylindrical structure for producing a casting can comprise: a cylindrical main body having a body part and a female joint consecutively connected to the body part and having an inner diameter larger than an outer diameter of the body part. A body inside cover layer can cover the inner face of the body part and/or an outside cover layer can cover an outer face of the female joint