Capsule filling · Industry glossary
Dosator
A volumetric dosing device used in capsule filling, including powder-dosing applications.
Also called: dosator filling; dosator technology.
How does a dosator put a dose into a capsule?
A dosator meters material before transferring it into the open capsule body. In a powder-compacting arrangement, the dosator enters a powder bed, a piston forms a powder slug, and the unit carries the slug over a capsule body for discharge. The shell receives the dose; its size label is not the dosing mechanism.
This is not the only arrangement. A unit for pellets or minitablets can use suction for pickup rather than forming a compacted powder slug. Identify the material and installed dosing unit before assuming how the dose is retained and discharged.
Is a volumetric dosator the same as weighing each dose?
No. Volumetric metering describes how a dose is formed; weighing describes a mass measurement. A machine can combine a dosator with a separate in-process weight-control system without making the dosing chamber itself a balance.
For a quotation, distinguish the metering unit from the weight-check arrangement: what mass is measured, which capsules are checked, and whether the result feeds back to dosing. A volumetric label alone does not establish a guaranteed fill weight for a new blend.
How is a dosator different from a tamping-disc system?
In the powder dosator arrangement, the dose remains in the dosator during transfer. A tamping-disc arrangement forms doses in disc bores using pins. They identify different dosing mechanisms, not interchangeable names for one part.
Compare the mechanisms using the intended formulation and target dose. Their names describe dose formation, rather than an accuracy ranking.
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