Gelatin-Based Cooling Release Agent for Casting Dies
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Solution Overview
Problem
Existing coolants and release agents for casting molds and machining tools face issues such as settling, uneven distribution, non-biodegradability, residue buildup, and environmental hazards, leading to dimensional accuracy problems, increased cleaning efforts, and reduced tool durability due to built-up edges and pickling additive damage.
Innovation Solution
A concentrate containing 10% to 50% gelatin with specific molecular weight and nitrogen content, diluted in water, which forms a uniform release film, reduces residue buildup, enhances cooling, and is biodegradable, allowing for improved machining efficiency and reduced waste disposal concerns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water-emulsified polymers, waxes, silicones, or modified polysiloxanes are used as cooling release agents, then the mold can be cooled and the cast product can be demolded, but the agent accumulates in areas not exposed to molten metal, causing dimensional accuracy problems and sealing problems
Solution Approach 1:
The patent changes the chemical composition parameters of the release agent by using gelatin-based compounds with specific molecular weights (1,000-7,000 Daltons) and nitrogen content (16-19%), which alters the degradation behavior and prevents accumulation in cooler mold areas, thereby maintaining dimensional accuracy while ensuring demoldability
Solution Approach 2:
The gelatin-based release agent is designed to be fully biodegradable and decompose completely under casting conditions, acting as a temporary protective layer that serves its purpose during casting and then degrades without leaving harmful residues, unlike persistent wax and silicone-based agents
2Temperature
If the cooling release agent is sprayed repeatedly, then the mold can be cooled effectively, but the agent dries out and cannot be fully emulsified in water, leading to layer build-up
Solution Approach 1:
The patent modifies the emulsion stability parameters by using gelatin as a stabilizing agent that maintains uniform distribution of the active release agent in water even after prolonged standing and repeated spraying, preventing drying out and build-up while maintaining cooling efficiency
Solution Approach 2:
Instead of trying to prevent the agent from drying out, the patent inverts the approach by using gelatin to ensure that any dried residue is water-soluble and can be easily washed away, turning the potential problem of drying into a non-issue
3Manufacturing precision
If strong acids, alkalis, or solvents are used to remove water-repellent residues, then the casting surface can be cleaned, but the cleaning process becomes complex and costly
Solution Approach 1:
The gelatin-based release agent is designed to be fully biodegradable and water-soluble, serving as a temporary protective layer that can be easily washed away with water without requiring complex cleaning processes involving strong acids, alkalis, or solvents
Solution Approach 2:
The patent converts the potential harm of residue build-up into a benefit by using gelatin, which forms a protective layer during casting but then becomes easily removable through its water-solubility and biodegradability, turning a cleaning problem into a simple washing process
4Ease of operation
If cooling lubricants contain pickling agents, then the tool can be lubricated, but the alloying elements in the workpiece can be damaged
Solution Approach 1:
The patent extracts the harmful pickling agents from the cooling lubricant formulation, using only gelatin-based compounds that provide lubrication without damaging the alloying elements in the workpiece, thereby maintaining workpiece quality while ensuring adequate lubrication
5Loss of substance
If the concentrate is diluted to low concentration, then the cost is reduced, but the effectiveness may be insufficient
Solution Approach 1:
The patent optimizes the molecular weight parameters of the gelatin (1,000-7,000 Daltons) and nitrogen content (16-19%) to achieve maximum release and cooling effectiveness at low concentrations, allowing cost-effective dilution while maintaining sufficient performance
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 gelatin-based concentrate ensures better wetting, reduced built-up edges, improved cooling efficiency, and easier residue removal, maintaining dimensional accuracy and tool durability while being environmentally friendly, allowing for chip reuse and reduced operational costs.
Implementation Method 1
such a cooling and release agent containing gelatin ensures uniform wetting of the mold surface when sprayed and forms a well-adhering, uniform release film
Implementation Method 2
the release agent breaks down under the prevailing temperature conditions through pyrolytic decomposition, creating a carbon-rich layer responsible for the release effect. This simultaneously prevents aluminum from diffusing into the mold
Implementation Method 3
The water contained in the cooling and release agent serves to cool the mold and to clean it of any residues that may remain after demolding
Implementation Method 4
The increased water content in the coolant and release agent ensures better wetting and more effective cooling of the tool surfaces
Implementation Method 5
When used as a cooling and lubricating agent, it should reduce the force required for machining and increase the cooling effect
Data Source
AI summary
Known cooling and release agents or lubricating agents are not biodegradable and tend to form undesired layer buildup when applied repeatedly to the casting die. The invention therefore proposes using a concentrate for producing a cooling and release agent for reusable casting dies, particularly steel casting dies, or a cooling and lubricating agent, particularly for machining, having an active substance dissolved in water and comprising a protein having a weight proportion of 10% to 50%. Good releasability of the cast parts from the casting die and a good cooling effect on the casting die are obtained using such a cooling and release agent or lubricating agent. Said agent is further biodegradable.