To resolve issues where die-cast parts are difficult to clean, focus on these release agent-centric steps:
Analyze the difficult-to-clean location and its characteristics: Identify the root cause—e.g., excessive release agent concentration leading to heavy residue; mismatch between the release agent and on-site operating conditions (e.g., using a high-silicone release agent when a silicone-free one is required for downstream processes); or changes in cleaning solutions/processes.
Evaluate cleaning protocols and dilution accuracy: First, verify if the cleaning process itself is flawed. Next, check the release agent’s on-site dilution ratio—over-concentration is a common culprit. Use a graduated cylinder or spectrophotometer to calibrate the ratio and prevent machine-induced errors that increase residue. If no issues are found, discuss the release agent’s composition with the supplier.
Select a compatible release agent: In practice, most difficult-to-clean cases stem from overly concentrated release agents. A smaller portion arises from high-viscosity release agents containing large molecular substances, which cause uneven spreading and gelation. Choose a release agent tailored to your actual operating conditions.
Important: This guide focuses solely on release agent-related solutions. In real-world scenarios, comprehensive judgment must integrate die-casting parameters (temperature, speed, time, pressure) and other process variables.
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