Precision Molding & Tooling Engineering Blog
In-depth technical decision guides, material compatibility matrices, tooling selection benchmarks, and DFM best practices authored by Rilong senior tooling engineers in Shenzhen, China.
Overmolding Metal with Plastic: Complete DFM, Insert Design & Bonding Guide (2026)
B2B engineering guide to metal-to-plastic insert molding, retention knurling, and CTE thermal stress mitigation.
IP68 Waterproof Electronics Overmolding: Low-Pressure vs. LSR & TPE Encapsulation
Hermetic IP67/IP68 encapsulation guide comparing low-pressure molding, LSR injection, and TPE potting for delicate electronics.
2K Two-Shot Injection Molding vs. Overmolding: Cost, Tolerance & Tooling Selection Matrix
Decision matrix comparing 2K multi-shot molding vs. pick-and-place overmolding on tooling cost, tolerances, and cycle times.
Liquid Silicone Rubber (LSR) Injection Molding & Shore A 45 Tactile Keypad Engineering
Engineering guide to cold-runner LSR injection tooling, shut-off lands, and Shore A 45 tactile silicone keypads.
SPI Mold Surface Finish Standards (A-1 Mirror Polish to D-3) & Rapid Tooling Lead Times
SPI surface finish classification chart from A-1 diamond mirror polish to D-3, tool steel selection, and rapid lead times.
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