Water-Soluble Die-Casting Plunger Lubricant
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current plunger lubricants for die-casting, such as oil-based and water-soluble lubricants, face issues with flammability and lubricating performance, leading to product defects and environmental contamination, with existing water-soluble lubricants either burning easily or lacking sufficient lubrication properties.
Innovation Solution
A plunger water-soluble lubricant comprising mineral oil, synthetic hydrocarbon, grease, fatty acid ester, alkali metal salts of higher fatty acids or aliphatic hydroxy acids, alkali metal salts of synthetic or petroleum sulfonic acids, particulate silica, and water, formulated to provide excellent lubrication while minimizing flammability and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an oil-based lubricant is used, then excellent lubricating property is achieved, but flammability increases and working environment deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the lubricant by using water-soluble compounds (metal salts of higher fatty acids and aliphatic hydroxy acids) instead of oil-based compounds. This parameter change maintains lubricating properties while eliminating flammability and improving ease of cleanup, directly resolving the contradiction between lubrication performance and harmful effects.
Solution Approach 2:
The patent creates a composite lubricant system combining metal salts of higher fatty acids, metal salts of aliphatic hydroxy acids, and particulate materials (graphite, talc, or PTFE). This composite approach achieves excellent lubricating properties through synergistic effects while the water-soluble base components prevent flammability and facilitate easy cleanup.
2Object-affected harmful factors
If a water-soluble lubricant is used to reduce flammability, then safety improves, but lubricating property deteriorates
Solution Approach 1:
The patent combines water-soluble metal salts (higher fatty acids and aliphatic hydroxy acids) with particulate lubricants (graphite, talc, or PTFE) to create a composite lubricant. The water-soluble components provide safety and ease of cleanup, while the particulate materials provide the necessary lubricating film, achieving both reduced flammability and excellent lubrication.
Solution Approach 2:
The patent applies different functional components to different aspects of lubrication: the metal salts provide boundary lubrication and water solubility, while the particulate materials (graphite, talc, PTFE) provide low-friction sliding surfaces. This local differentiation of functions allows the lubricant to simultaneously achieve safety and lubrication performance.
3Reliability
If solid substances are dispersed in oil to improve lubrication, then lubricating property improves, but cleanliness and working environment worsen
Solution Approach 1:
The patent changes the base fluid parameter from oil to water-soluble metal salts, fundamentally altering the cleanup characteristics. The water-soluble nature allows residues to be easily rinsed away with water, eliminating the difficult cleanup problems associated with oil-based lubricants while maintaining excellent lubrication through the combined action of metal salts and particulate materials.
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 lubricant effectively reduces sleeve abrasion, maintains injection speed, suppresses burning when contacting molten metal, and improves the working environment by providing excellent lubrication and safety, while maintaining productivity and product quality.
Implementation Method 1
a plunger lubricant is supplied between the plunger and the sleeve... to reduce an abrasion/friction of the sleeve on sliding surfaces
Implementation Method 2
particulate silica... capable of reducing internal stress of a cast product and preventing cracking due to the internal stress
Data Source
AI summary
A plunger water-soluble lubricant for die-casting includes a component (a) being one or more than one of compounds selected from the group consisting of a mineral oil, a synthetic hydrocarbon, a grease, and a fatty acid ester; a component (b) being one or more than one of compounds selected from the group consisting of an alkali metal salt of a higher fatty acid and an alkali metal salt of an aliphatic hydroxy acid; a component (c) being one or more than one of compounds selected from the group consisting of an alkali metal salt of a synthetic sulfonic acid and an alkali metal salt of a petroleum sulfonic acid; particulate silica; and water. This water-soluble lubricant for die-casting has a low burnability (flammability), and exerts an excellent lubricating property without lowering the productivity and worsening the working environment.