Foundry Binder System Moisture Stability via Aluminate Ions

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Solution Overview

Problem

The foundry industry faces challenges in producing moldings with good moisture resistance without using lithium or boron compounds, which are costly and pose environmental concerns.

Innovation Solution

A process involving a binder system composed of particulate amorphous silicon dioxide, waterglass, and aluminate ions dissolved in an aqueous phase is used to produce moldings with enhanced moisture resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If lithium or boron compounds are used to improve moisture resistance, then moisture stability is improved, but cost increases and environmental concerns arise

Engineering Contradiction:

Improvemoisture stabilityVSAvoidenvironmental concerns and cost

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the chemical composition parameters of the binder system by replacing lithium or boron compounds with alumina particles and modified waterglass. This parameter change achieves the same moisture resistance function through different chemical constituents, eliminating environmental concerns and reducing cost while maintaining reliability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses alumina particles and modified waterglass as inexpensive alternatives to expensive lithium or boron compounds. These cheaper materials provide sufficient moisture resistance for the application, making the production process more economical while reducing environmental impact

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Reliability

If conventional binder systems are used, then manufacturing simplicity is maintained, but moisture resistance is insufficient

Engineering Contradiction:

Improvemoisture resistanceVSAvoidmanufacturing simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent creates a composite binder system combining alumina particles with modified waterglass. This composite material provides enhanced moisture resistance compared to conventional single-component binders, while the mixing process remains simple and integrates easily into existing manufacturing workflows

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The modified waterglass acts as an intermediary binding agent that facilitates the formation of a stable matrix around alumina particles. This intermediary component enables the composite system to achieve superior moisture resistance while maintaining ease of manufacture through standard mixing and curing processes

Inventive Principle:

Principle #24Intermediary (Mediator)

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 process achieves improved moisture stability and thermal stability of molds, cores, and feeder elements, resulting in high-quality cast surfaces, especially with molten aluminum or aluminum alloys.

Implementation Method 1

a binder system comprising the following components in three spatially separate vessels: a component (A) comprising particulate amorphous silicon dioxide, a first liquid component (B) comprising waterglass, and a second liquid component (C) comprising aluminate ions dissolved in an aqueous phase

Methodology Applied

Scientific EffectChemical Bonding: Chemical Bonding

Implementation Method 2

a second liquid component (C) comprising aluminate ions dissolved in an aqueous phase

Methodology Applied

Scientific EffectSolvation: Solvation

Data Source

PatentUS12337376B2Method for producing an article for use in the foundry industry, corresponding mold, core, feed element, or molding material mixture, and devices and uses

Publication Date: 2025.06.24 HUTTENES-ALBERTUS CHEMISCHE WERKE GMBH

AI summary

What is described is a process for producing an article for use in the foundry industry selected from molds, cores, feeder elements and molding material mixtures, and includes the following steps: (S1) producing or providing a binder system with the following components in three spatially separate vessels: a component (A) particulate amorphous silicon dioxide, a first liquid component (B) waterglass, and a second liquid component (C) aluminate ions dissolved in an aqueous phase, (S2) contacting a mold base material (D) and constituents of all the components (A), (B) and (C) of the binder system in predetermined ratios in one or more steps, so as to result in a molding material mixture in which the aluminate ions and the particulate amorphous silicon dioxide are mixed wholly or partly into the waterglass, wherein steps (S1) and (S2) are conducted in a facility for producing molding material mixtures. Also described are a corresponding molding material mixture and apparatuses and uses.