Foundry Sand Measuring Device for Accurate LOI After Pre-Drying
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Solution Overview
Problem
Existing measuring devices for foundry sand quality evaluation inaccurately measure the loss on ignition (LOI) due to moisture retention, which affects the accuracy of binder content determination in recycled foundry sand.
Innovation Solution
A measuring device that includes a container for foundry sand with a heating mechanism to remove moisture, a conveying system to transfer the dried sand to a balance for weight measurement, and a furnace for calcination, allowing precise LOI determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If moisture removal heating is performed before measurement, then measurement precision of LOI is improved, but measurement time is prolonged
Solution Approach 1:
The heating device performs preliminary moisture removal heating on the foundry sand before the LOI measurement process begins. By pre-drying the sand in the container before it enters the furnace, the measurement process starts with moisture already removed, thereby improving measurement precision without adding significant time to the core measurement cycle.
Solution Approach 2:
The patent combines the moisture removal heating function and the LOI measurement heating function into a single integrated system. The container with heating device serves both to pre-dry the sand and to hold it during measurement, merging preparation and measurement functions to eliminate redundant time.
2Loss of time
If moisture remains in the foundry sand, then measurement time is shortened, but measurement precision of LOI deteriorates
Solution Approach 1:
The system performs the moisture removal action before the measurement process, ensuring that when the sand enters the furnace for LOI measurement, it is already dry. This preliminary drying action prevents moisture from interfering with the binder vaporization measurement, maintaining precision without requiring extended measurement time.
Solution Approach 2:
The patent replaces manual moisture removal or natural drying processes with an automated heating device that actively removes moisture through controlled heating. This substitution ensures consistent and complete moisture removal, guaranteeing measurement precision while maintaining efficient timing.
3Device complexity
If a simple weighing system is used, then device complexity is reduced, but measurement precision of weight changes deteriorates
Solution Approach 1:
The patent introduces a conveying device as an intermediary between the heating container and the balance. This intermediary component automatically transfers the container with foundry sand to the measurement position, enabling precise weight measurements without requiring complex manual handling mechanisms or direct integration of the balance with the heating system.
Solution Approach 2:
The measuring device performs self-service through automated conveying and positioning mechanisms. The system automatically moves the container to the measurement position and returns it, eliminating the need for complex manual operation systems while maintaining high measurement precision through consistent, repeatable positioning.
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 device ensures accurate evaluation of foundry sand quality by effectively removing moisture and measuring the LOI, enabling real-time assessment of binder content without prolonging the measurement time.
Implementation Method 1
a heating device configured to heat the foundry sand in the container
Implementation Method 2
a furnace configured to heat the foundry sand... the LOI is acquired from a weight difference of the foundry sand before and after a calcination step of vaporizing the binder
Data Source
AI summary
A measuring device according to one aspect is used to measure a loss on ignition of foundry sand. This measuring device includes a container configured to accommodate foundry sand, the container having a discharge port for discharging the foundry sand to a discharge position, a heating device configured to heat the foundry sand in the container, a conveying device configured to convey the foundry sand discharged from the discharge port from the discharge position to a measurement position, a balance configured to measure the weight of the foundry sand disposed at the measurement position, and a furnace configured to heat the foundry sand.