The comparison is apt: just as foundries shake out castings from sand molds, supplement manufacturing often requires gently separating starch-molded gummies from their mold cavities. The materials differ, but several core engineering principles from the foundry floor transfer directly to high-speed gummy production here at KorNutra. The goal is a cleaner release with minimal airborne dust, protecting both the product and the production environment.
Vibration with Precision Tuning
In foundries, vibration tables shake out sand from castings. For starch removal, we can apply controlled, high-frequency vibration, not to bash the gummy loose, but to fluidize the starch bed and break the surface adhesion. The key is tuning amplitude and frequency to the specific starch particle size and piece geometry. At KorNutra, we optimize these parameters so the starch flows like a liquid, gently releasing the gummy rather than crushing it, which would generate dust.
Directed Air Knives and Curtains
Foundries often use compressed air jets to blast sand from complex geometries. In our setting, low-pressure, precisely angled air knives sweep across the mold surface, lifting the gummy while carrying loose starch away into collection systems. A continuous laminar airflow curtain around the ejection zone captures dust at the source before it becomes airborne, improving worker safety and cross-contamination control.
Non-Stick Mold Release Coatings
Sand molds and cores in foundries are routinely coated with refractory washes for a clean casting surface, while permanent dies receive a release agent so the casting ejects cleanly. For starch molds, the same idea applies with a food-grade, durable anti-adhesion coating on the mold cavity surfaces. A thin, low-friction layer reduces the force needed for release. Less mechanical shock means fewer starch particles become detached as dust. At KorNutra, we continuously test novel, transparent coatings that don't compromise the precision of the mold and are easily cleaned.
Humidity-Controlled Microenvironments
Moisture is what gives a sand mold its strength and collapsibility. Starch behavior is equally moisture-sensitive. A localized, low-humidity zone right at the point of ejection, created with dehumidified air curtains, keeps starch from clumping or sticking to the gummy when ambient humidity swings. That consistent release condition is a dust-reduction technique adapted from foundry sand conditioning, where moisture is controlled before the sand reaches the mold.
Soft Robotic Picking and Catch Systems
Instead of letting gummies free-fall onto a conveyor after release, many foundries now use robotic arms to lift castings gently out of the sand. A soft-touch gripper or vacuum-based pick-and-place mechanism that removes the gummy the moment it is freed stops it from rubbing against residual starch, which creates fine dust. At KorNutra, vision systems paired with soft end effectors pick each piece on its way out, almost eliminating post-release dust generation.
Why Dust Control Is a cGMP Requirement
Cleaner release does real compliance work. Under 21 CFR Part 111, supplement manufacturers must design the physical plant and its processes to prevent contamination and mix-ups of components and products, and airborne starch from one run settling into the next is the kind of extraneous material the rule targets. Starch is also a combustible dust. OSHA lists it alongside flour, sugar, and grain, and the Chemical Safety Board recorded 281 combustible dust incidents between 1980 and 2005. Capturing starch at the ejection point, rather than letting it drift and settle, shortens changeover cleaning and keeps airborne starch from carrying into the next product run.
These techniques, adapted from foundry shakeout, focus on gentle separation, immediate dust capture, and controlled surfaces. They improve mold release efficiency while keeping the manufacturing suite cleaner. No recipes or health claims needed, just smart engineering.