Engineering insights
Guides, data and case studies from our tooling engineers
Practical articles on stamping dies, injection molds, tooling spare parts and sourcing from China, written by the engineers who design and build them in Dongguan.
99 articles8 case studiesUpdated Oct 14, 2026
Injection molding
How to Prevent Flash, Warpage & Sink Marks
How to prevent flash, warpage and sink marks in injection molding, with the venting, packing, cooling and gate changes that fix each defect.
Complete Plastic Shrinkage Chart (ABS, PC, PA66, POM)
A complete plastic shrinkage chart for ABS, PC, PA66 and POM, with the rates to design into mold cavities so parts finish on dimension.
Calculating Plastic Injection Molding Unit Costs: Complete Pricing Breakdown
Calculate injection molding unit costs, you can use this formula, like… Unit Price = Material Cost + Processing Cost + (Mold Cost ÷ Total Parts) .
Multi-Cavity Injection Molds: Cost & Efficiency Breakdown
How cavity count, steel grade, runner type and tolerance class drive multi-cavity mold cost, and when a 4- or 8-cavity tool actually pays for itself.
Sourcing Ejector Pins & Mold Components in China
How to specify and source ejector pins, guide pillars and bushings in China: DIN, ISO, HASCO and MISUMI standards, tolerances and quality checks to insist on.
China Fiber Optic Connectors | Injection Molding Precision Parts Manufacturer Company
Precision injection molding for fiber optic connector components: tolerance requirements, tooling design, cleanliness control and volume production in China.
Reducing Cycle Time Through Better Mold Cooling
How cooling layout drives injection molding cycle time, and what conformal channels, baffles and coolant control can realistically save per shot.
Injection molding: Hot Runner Vs Cold Runner
Hot runner versus cold runner injection molds compared on tooling cost, cycle time, material waste and maintenance, with the break-even volume for each.
Injection Molding Tolerances (With Precision Chart)
Achievable injection molding tolerances by feature type and resin, with a precision chart covering standard and fine tolerance grades for plastic parts.
How Much Does an Injection Mold Cost in China?
Real injection mold cost ranges from Chinese toolmakers by cavity count, steel grade and part size, plus the hidden costs buyers routinely miss.
Injection Molding Guide: Costs, Materials, Process, and Mold Tooling
A complete injection molding guide: how tooling cost and per-part cost differ, which resins suit which parts, and how process settings affect both.
Micro Injection Molding: Controlling Flash on Tiny Parts
Why flash forms on micro-molded parts and how to control it: venting, clamp force, parting-line accuracy and the tooling tolerances that prevent it.
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