During XP MOLD high-precision plastic mold part processing, problems such as material shortages, stress cracking, burn marks, and sink marks often occur, directly impacting processing quality. To address these issues and meet the requirements of high-precision processing, optimized solutions are as follows:
1. Sink Mark Issue:
Increase injection pressure and extend holding time, lower barrel and mold temperatures, and force cooling and fill flow edges at the sink marks. Eliminate design variations in part thickness and shorten narrow ribs prone to sink marks to meet the precision requirements of XP Mold high-precision machining.
Increase the temperature of the XP MOLD mold and barrel, and increase the injection pressure; design a 0.02-0.04mm deep and 5-10mm wide gas escape groove on the parting surface, and install an escape pin; when multiple cavities are short of material, enlarge the corresponding gate, adjust the flow edge configuration and thicken it, and improve mold finish to ensure high-precision filling results.
3. Deformation and Cooling Issue:
Add gates to thick-walled parts to extend mold cooling time. Increase barrel temperature and reduce injection pressure to ensure uniform cooling and avoid temperature differences affecting the flatness of parts processed by XP Mold high-precision machining.
4. Material and flow mark issues:
Prioritize using high-flowability materials suitable for the application, and dry at 85°C for 4 hours (avoid high-temperature, short-term drying); increase the XP MOLD mold temperature, lower the barrel temperature, insulate the injection nozzle, and thicken the flow edge. This optimizes high-precision processing stability from both the material and process perspectives.
5. Warpage Issue:
Add gates to thick-walled parts to replace warp-prone straight structures with large R-curves. Use reversible bending molds, increase the number of ejector.
