Injection molding process — 6 stages diagram

Injection molding — interactive cross-section

Click through the six stages of the plastic injection molding cycle. Each stage shows the mold anatomy and key process parameters.

1 · Mold clamping

Movable platen closes against fixed platen under high tonnage

Steel mold Molten polymer Solidified part Coolant Heaters
conveyor Injection unit Clamping unit Hopper Band heaters (3 zones) 200° 240° 270° Reciprocating screw · L/D ≈ 20 feed zone compression metering Nozzle Fixed platen A-side (cavity) sprue runner / gate B-side (core) ejector pins in out parting line Movable platen tie bar Hydraulic clamp cylinder falls onto conveyor
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