The comparison is apt-just as foundries shake out castings from sand molds, supplement manufacturing often requires gently separating starch-based tablets or capsules from their mold cavities. While the materials differ, several core engineering principles from the foundry world can be adapted to our high-speed, precision tablet 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 tablet 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 tablet geometry. At KorNutra, we optimize these parameters so the starch flows like a liquid, gently releasing the tablet 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 can sweep across the mold surface, lifting the tablet while simultaneously carrying loose starch away into collection systems. A continuous laminar airflow curtain, similar to those used in casting cooling lines, can be designed to encircle the ejection zone, capturing dust at source before it becomes airborne-significantly improving worker safety and cross-contamination control.
Non-Stick Mold Release Coatings
Metal casting dies are routinely coated with refractory washes to prevent sticking. For starch-based molds, we can borrow this concept 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
Sand molds rely on precise moisture for strength and collapsibility. Starch behavior is equally moisture-sensitive. Creating a localized, low-humidity zone right at the point of ejection-using dehumidified air curtains-can prevent starch from clumping or sticking to the tablet due to ambient humidity swings. This consistent release condition is a quiet but powerful dust-reduction technique inspired by foundry conditioning rooms.
Soft Robotic Picking and Catch Systems
Instead of letting tablets 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 tablet the moment it is freed will stop it from rubbing against residual starch, which creates fine dust. At KorNutra, integrating vision systems with soft end effectors allows us to pick each tablet on its way out, almost eliminating post-release dust generation.
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.