Practical guides on silicone & plastic molding — cost, design, tooling and sourcing from China, written for global B2B buyers.
SPI mold finish grades A-1 to D-3 explained: how surface finish drives tool steel, draft angle, polishing cost and part appearance, plus how to call out finish on a drawing.
Read article →Large part injection molds explained: clamping force, wall thickness, warpage control, steel choice, mold weight, shipping and cost drivers — plus a spec checklist for tooling up to 2 m × 1.6 m. A practical 2026 guide for sourcing teams.
Read article →Injection mold gate design explained: edge, submarine, pin-point, fan, hot tip and valve gates compared by cost, vestige and volume — plus 8 rules for the right gate location. A practical 2026 guide for sourcing teams.
Read article →How injection mold cooling channels are designed: channel diameter, spacing, turbulent flow, conformal cooling vs straight-drilled, and the cooling mistakes that raise cycle time and part price. A practical 2026 guide for mold buyers.
Read article →Hot runner vs cold runner molds compared on tooling cost, material waste, cycle time, maintenance and break-even volume — a practical 2026 guide for B2B mold buyers.
Read article →How to handle undercuts in injection molding: side actions, lifters, collapsible cores and shut-offs compared on tooling cost, cycle time and reliability. A practical 2026 guide for sourcing teams.
Read article →Single-cavity, multi-cavity or family mold? How cavity count changes tooling cost, per-part price, lead time and quality risk — with break-even math and a selection checklist.
Read article →The most common injection molding defects — short shots, sink marks, warpage, weld lines, flash, silver streaks and burn marks — their root causes, how to fix them on the press, and how to prevent them before the mold is cut.
Read article →What a DFM analysis for injection molding must catch before steel is cut: wall thickness, draft, ribs, undercuts, gate and parting line, shrinkage and cooling. Includes a pre-tooling checklist and what a real DFM report should contain.
Read article →How to approve a new injection mold: what to check at T0, T1 and T2 trials, what a valid FAI and PPAP package must contain, cosmetic and CTQ acceptance rules, and a sign-off checklist for buyers.
Read article →Which steel for your injection mold? P20, 718H, H13 and S136 compared on hardness, mold life, corrosion resistance, polish and cost — a 2026 selection guide for buyers sourcing tooling from China.
Read article →How long does it take to make an injection mold in China? A realistic 2026 timeline by mold complexity, what causes delays, and how to speed up tooling and delivery to Russia and CIS.
Read article →LSR injection molding vs silicone compression molding: tooling cost, cycle time, tolerances, and which process fits your part. A practical 2026 guide for sourcing teams.
Read article →Overmolding vs insert molding: what's the difference, which costs less, and which is faster? A practical 2026 guide for product engineers and sourcing teams.
Read article →Choosing a mold supplier in China? Verify these 7 things before paying a deposit: real capability, quotation transparency, DFM support, testing reports, communication speed and export experience.
Read article →How much does silicone injection molding cost in 2026? This guide breaks down silicone mold pricing, the 4 cost-driving factors, typical price ranges and 5 proven ways to cut your LSR mold tooling cost.
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