Molding Process
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ABAK processing temperature window
Problem Phenomenon
ABAK processing temperature is difficult to set; PA requires high temperature to melt while ABS degrades at high temperature, so the window is narrow.
Cause Analysis
PA6 has a melting point of 220℃ and requires processing at 240~250℃, while PA66 has a melting point of 260℃ and requires higher temperatures; ABS begins to degrade above 260℃; the alloy temperature must be above the PA melting point but below the ABS degradation temperature; the difference in thermal stability between the two phases narrows the window.
Solution
①Select the temperature according to the PA component: 240~260℃ for PA6 alloy, 240~280℃ for PA66 alloy; ②avoid prolonged high-temperature residence; ③calibrate temperature with actual measurements; ④prefer PA6-based alloys to widen the window.
Key Takeaway
The ABAK temperature window is the intersection of the thermal properties of the two components; PA6-based is easier to process than PA66-based; actual measured temperature is the process benchmark.; After confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
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