TPU injection molding succeeds when grade selection, drying, mold design, filling, cooling, demolding, inspection, and packaging are controlled as one process. TPU performance depends on chemistry and grade, so a generic recipe or hardness number cannot replace the supplier’s data sheet.
Define the grade and part requirement
- Specify hardness, flexibility, compression, tear, abrasion, chemical exposure, temperature, color, and service life.
- Confirm whether the part is a seal, grip, gasket, protective cover, flexible hinge, wheel, or overmolded component.
- Approve the exact chemistry, lot, color, additives, and substitution rules.
Prepare and mold the material
- Dry hygroscopic grades according to the supplier guide and maintain sealed handling.
- Design gates, runners, vents, cooling, ejectors, draft, surface finish, and release around the soft material.
- Control screw shear, melt temperature, fill, pack, mold temperature, cooling, purge, and residence time.
Inspect and release the part
Check dimensions, hardness, appearance, flash, voids, splay, adhesion, elasticity, assembly, and application-specific performance. Protect molded TPU from contamination and distortion during handling. Release production only after the process window and change-control rules are documented.
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 engineering services
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- Injection mold making services
- Contact Cavity Mold