Foundry Sand Inspection Device Single-Step CB and Strength Measurement
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Solution Overview
Problem
Existing foundry sand inspection methods require pre-measuring compactability (CB) and then compressing the sand to produce a test piece, leading to a prolonged inspection time due to the need for multiple sample charges.
Innovation Solution
A foundry sand inspection method that involves charging the sand into a test tube, measuring CB while compressing the sand to produce a test piece, and then compressing the test piece to measure its compressive strength, all within a single sample charge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pre-measurement of compactability (CB) is performed before producing test pieces, then measurement accuracy is improved, but inspection time is prolonged due to multiple sample charges
Solution Approach 1:
The patent combines the compactability measurement and compressive strength measurement into a single integrated process. The test piece is produced and measured in one continuous operation without removing the sample from the test tube, merging two previously separate measurement processes into one unified workflow that eliminates redundant handling and time consumption
Solution Approach 2:
The patent performs preliminary positioning of the pressurizing plate at a predetermined height before charging the foundry sand. This preliminary action ensures that the test piece will be produced with the correct dimensions for accurate compressive strength measurement, eliminating the need for post-production adjustments or remeasurement
2Reliability
If multiple sample charges are used for individual CB and compressive strength measurements, then measurement reliability is improved, but productivity is reduced
Solution Approach 1:
The patent merges CB measurement and compressive strength measurement into a single sample charge process. The test piece is produced within the test tube and immediately measured for compressive strength without removal, combining two measurement functions into one continuous operation that maintains reliability while doubling productivity
Solution Approach 2:
The test tube and pressing mechanism serve multiple functions: they are used for both compactability measurement and compressive strength measurement in sequence within the same sample charge. This multi-functionality eliminates the need for separate equipment or sample preparation for each measurement type
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 method significantly shortens the inspection time for foundry sand by eliminating the need for multiple sample charges, allowing for simultaneous measurement of CB and compressive strength.
Implementation Method 1
measuring compactability (CB) of the foundry sand while compressing the foundry sand in the test tube to produce a test piece
Implementation Method 2
compressing the test piece and measuring a compressive strength of the test piece
Implementation Method 3
a compressive strength of the test piece is measured from a load at the breakage of the test piece
Data Source
AI summary
A foundry sand inspection method according to an aspect includes: charging foundry sand into a test tube; measuring compactability (CB) of the foundry sand while compressing the foundry sand in the test tube to produce a test piece; and compressing the test piece and measuring a compressive strength of the test piece.