专注发泡胶整体解决方案
专注发泡胶整体解决方案
Injection molds are large, heavy, and high-precision tools. Cavity surfaces, parting lines, inserts, and guide pins must not be struck, and bare metal surfaces can rust during long sea voyages. A damaged mold means costly repair and delayed delivery, so export packaging has to protect against impact, vibration, and rust and moisture at the same time.
Three Packaging Challenges
First, the mold is heavy and has a high center of gravity, so it is vulnerable to tipping and collision during handling, with corners and parting lines taking the first load. Second, precision features such as cavity faces, inserts, ejector pins, and guide pins can be damaged by even a light impact. Third, exposed metal can oxidize or spot-rust when the container experiences temperature swings and humid air.
How Foam-in-Place Wraps the Mold
CosMolar first wraps the whole mold in PE film to keep foam and metal apart and reduce moisture contact. The mold is secured at the designed angle inside the crate, then AB polyurethane foam is dispensed into the gaps around it. The foam expands in seconds, fills every gap around the mold outline, and cures to hold the mold centered and still. Buffer space is left around parting lines, guide pins, and inserts so foam does not press directly on precision faces.
Rust and Moisture Protection
The mold should be dry before packing; the PE film and foam layer form two barriers against humid air. For sea freight, container rain and condensation must be considered, so the crate base is kept water-resistant and exposed machined faces can receive rust protection where needed. Molds stored for long periods or transferred through many hands should take a higher moisture-protection grade.
Reinforced Crate and Bracing
Heavy molds usually go in a reinforced wooden crate with a load-bearing base. The mold base sits firmly on the crate floor, corners are protected, and the unit is braced so it cannot slide inside the box. Oversized or high-value molds can add external strapping and fixing on top of the foam cushioning.
CosMolar Solution and Service
CosMolar selects foam density by mold weight and shape: the 6kg/m3 general grade for regular molds, and 17kg/m3 or 23kg/m3 grades for heavy molds needing stronger load bearing and impact resistance. The pack is validated with free sample testing before bulk rollout. Equipment carries a one-year warranty, with 4-hour phone response and 24-hour on-site service in the Pearl River Delta and 48-hour response nationwide. For heavy mold export packaging, call 400-812-0328 or visit https://www.cosmolar.com/.