Plastic injection mold selection should match part geometry, cavity count, runner system, production volume, cycle, automation, maintenance, tooling cost, and change risk. Two-plate, three-plate, family, multi-cavity, stack, cold-runner, hot-runner, insert, and side-action solutions each trade simplicity against output or geometry.
Compare the main mold choices
- Two-plate molds: practical for many straightforward parts when gate and runner layout fit the design.
- Three-plate molds: useful when a different gating arrangement or automatic separation supports the part and production plan.
- Single-cavity and multi-cavity molds: balance investment, output, cavity balance, inspection, and maintenance.
- Family molds: can mold related components together but require careful flow, packing, and dimensional balance.
- Stack molds: increase output per machine footprint but add alignment, service, and tooling complexity.
- Side actions, inserts, and special runners: enable geometry or process goals while adding cost and maintenance.
Choose with the whole lifecycle in view
Review volume, annual demand, part revisions, material, cosmetic requirements, gate vestige, scrap, automation, mold ownership, spare parts, and machine fit. The cheapest mold type at quotation may not be the lowest total cost once cycle time, maintenance, changeover, and inspection are included.
Plan the next step
Share your part, resin, annual volume, critical dimensions, finish, and timing with the Cavity Mold team through our contact page. We can review the manufacturing risks and recommend a practical next step.
Related Cavity Mold resources
- Injection mold making services
- Injection mold engineering services
- Plastic injection molding services
- Contact Cavity Mold