Step-by-Step Capsule Filling Machine Changeover
Invoering
Nutraceutical manufacturers and contract manufacturing companies often produce multiple capsule products for different customers. They usually require frequent production changes between batches.
Pharmaceutical manufacturers also perform product changeovers when switching between different capsule specifications or formulations. Daarom, capsule filling machine changeover has become a common production activity and a frequent question from machine users.
During a changeover, operators need to identify which components require replacement, which settings require adjustment, and which areas need cleaning before restarting production.
Voor een capsule vulmachine, incorrect adjustments may cause capsule separation problems, filling weight variation, or powder leakage. This article explains the components that need replacement during capsulegrootte changes and the cleaning requirements after the changeover process.
Belangrijkste opmerkingen
- Capsule filling machine changeover involves component replacement, mechanical adjustment, and cleaning steps before new production starts.
- Capsule size changes require matching the mold, feeding station, vulsysteem, and locking system with the new capsule specification.
- Powder changes mainly require filling adjustment, especially the gap between the dosing parts to control powder leakage.
- Cleaning the recovery bucket, vacuum pump filter core, and powder collection areas helps reduce contamination risks during GMP capsule production.
- A standardized capsule filling machine setup process helps operators reduce adjustment errors and maintain stable production conditions.
1.Changing Capsule Size Requires Component Replacement
Capsule Mold Replacement for New Sizes
The capsule mold is a key component of the capsule filling machine. It guides empty capsules during the separation, vulling, and closing process. The mold consists of an upper mold and a lower mold. The upper mold holds the capsule cap, while the lower mold supports the capsule body during filling.
When performing a capsule size change, the complete capsule mold replacement is required. The existing mold set must be replaced with a new mold that matches the target capsule specification.
After installing the new mold, operators use a calibration rod to check the concentricity between the upper mold and lower mold. This step confirms proper alignment before restarting the capsule filling machine.Incorrect mold alignment may cause capsule positioning errors, filling problems, or locking failures during production.
Capsule Filling Machine Complete Mold Set Replacement
Capsule Feeding Station Replacement and Adjustment
The capsule feeding station controls the transfer of empty capsules from the hopper into the mold system of the capsule filling machine. It ensures capsules enter the correct position before separation and filling.
When performing a capsule size change, the feeding components need to match the new capsule specification. The operator replaces parts such as the turning board, capsule sowing comb, and capsule retainer with suitable components for the new capsule size.
After component replacement, the operator adjusts the feeding position and checks capsule transfer during machine testing. The empty capsules should move smoothly without blocking or damage.
Filling Rod and Dosing Disc Adjustment
The filling rod and dosing disc work together inside the capsule filling machine to control powder filling. The dosing disc forms the powder measuring area, while the filling rod compresses and transfers powder into the capsule body.
During a capsule size change, the filling components need to match the new capsule specification. Traditional designs require operators to adjust the filling rod position after replacement. This process requires additional setup time and operator experience.
Some capsule filler designs use a fixed-position filling rod structure. The filling rod holder and pull-out slot design preset the rod position before installation. The slot controls the installation location, while the holder keeps multiple filling rods horizontally aligned as one assembly.
With this design, operators can replace the filling rod group without repeated height adjustment. Machines from international manufacturers, inclusief Ruida-verpakking, Fette-verdichting, ER IS, and Syntegon use similar structural concepts to simplify capsule filling machine setup. The filling rod replacement process can be completed within 15 notulen.
After installation, operators still check the dosing disc adjustment and perform trial filling to confirm powder distribution and capsule weight. Proper alignment between the filling rod and dosing disc helps maintain stable filling results during production.
The filling rod holder can significantly reduce replacement time
Locking Station Adjustment and Outlet Replacement
The locking station completes the final step of capsule assembly on the capsule filling machine. It presses the capsule cap and body together after powder filling. The locking position must match the capsule length and specification.
During a capsule size change, operators need to adjust the capsule locking station according to the new capsule format. Different capsule sizes have different locking heights, so incorrect settings may cause loose caps, incomplete locking, or capsule deformation.
The capsule outlet also requires replacement when changing capsule specifications. Each capsule size needs a suitable outlet opening to ensure stable product discharge. An incorrect outlet size may cause capsule blockage or unstable transfer after locking.
Vacuum Adjustment for Capsule Separation
The vacuum system separates the capsule cap from the capsule body inside the capsule filling machine. After the empty capsules enter the mold, vacuum suction holds the capsule cap and supports stable separation.
During a capsule size change, the vacuum setting needs to match the new capsule specification. Different capsule sizes have different weights, lengths, and separation conditions. The operator adjusts the vacuum level based on the actual capsule movement.
Insufficient vacuum may prevent the capsule cap from separating correctly. Excessive vacuum may deform the capsule or affect positioning accuracy.
After completing the capsule filling machine adjustment, operators run test capsules and check the separation condition. The capsule filler should maintain stable capsule opening before starting regular production. Proper vacuum adjustment helps avoid separation failures during the filling process.
2.Powder Change Requires Filling Adjustment
Adjusting the Gap Between Dosing Parts
When changing powder products, the capsule filling machine normally keeps the same capsule specification. The main adjustment focuses on the dosing system to match the new powder characteristics.
The gap between the upper plate and the dosing disc affects powder filling conditions. Operators adjust this distance according to powder characteristics, inclusief vloeibaarheid, bulkdichtheid, and fine particle content.
Powders with high fine particle content, lage dichtheid, or poor flowability are more likely to enter small gaps and create excessive leakage during filling. Powders with strong electrostatic behavior may also increase powder adhesion around the dosing area.
Operators adjust the gap between the upper plate and the dosing disc adjustment position to control powder movement. A suitable clearance allows stable powder filling while reducing excessive powder leakage.
During adjustment, operators use a feeler gauge to check the gap at different positions. When possible, multiple feeler gauges are inserted at different points to check the clearance simultaneously and speed up the adjustment process.
The operator moves the feeler gauge through the gap during inspection. It should slide with slight resistance. A tight position indicates insufficient clearance, while no resistance may indicate excessive clearance.
If the gap is too small, the upper plate and dosing disc may contact each other during operation, which can increase mechanical resistance or even cause the capsule filler to stop. If the gap is too large, powder may escape from the dosing area, creating excessive leakage and more cleaning workload.
After adjustment, the capsule filler runs a test batch. Operators check for abnormal friction noise and observe powder leakage during operation. The final setting is confirmed after checking filling weight and powder distribution.
3.Cleaning Requirements After Machine Changeover
After a capsule filling machine changeover, operators need to clean the parts that contact capsules or powder. This includes components removed during size changes and areas exposed to the previous powder.
Cleaning Replaced and Product Contact Parts
The cleaning scope includes the hopper, doseerschijf, vulstaven, upper and lower molds, locking station, discharge station, and powder collection trays.
The dosing disc and filling rods require careful cleaning because powder can remain around measuring holes and contact surfaces. The upper and lower molds also need inspection for powder trapped inside capsule positioning holes.
The cleaning sequence starts with clean water. Operators remove visible powder from each component, then blow the parts dry. A clean cloth is used to wipe remaining moisture from the surfaces.
Na het drogen, operators wipe the cleaned parts with 95% food-grade alcohol. The operator checks the surfaces again before reinstalling the components on the capsule filler.
Cleaning Vacuum Pump Filter Core
Tijdens capsule filling machine cleaning, operators should check the vacuum pump filter core for accumulated powder. Fine powder can enter the vacuum system during capsule scheiding and collect on the filter.
Excessive powder buildup can block the filter core and reduce vacuum suction. Reduced suction may affect capsule separation during operation of the capsule filler.
For cleaning, operators first remove the filter core from the vacuum system. They use a vacuum cleaner to remove the accumulated powder from the filter surface.
After vacuum cleaning, operators use an air gun to blow away remaining powder from the filter core. The cleaned filter core can then be reinstalled for the next production batch.
Cleaning Material Recovery Bucket and Powder Collection Tray
The powder collection tray sits below the dosing disc on the capsule filling machine. It collects powder that falls through the gap around the dosing area. This prevents powder from spreading across the machine surface during filling.
Powder collected in the tray is transferred to the material recovery bucket through the vacuum system. This powder has not entered the capsule filling process and can be collected for reuse when production requirements allow.
The material recovery bucket and collection tray need cleaning during every capsule filling machine changeover. This prevents powder from the previous batch from entering the next production batch and reduces cross-contamination risk.
Operators clean the powder collection tray and the inner wall of the material recovery bucket with clean water. They then blow them dry with an air gun and wipe remaining moisture with a clean cloth.
Na het drogen, operators wipe these surfaces with 95% food-grade alcohol. The recovery bucket filter core is cleaned separately with a vacuum cleaner and an air gun to remove accumulated powder.
Before reinstalling the recovery components, operators check the capsule filler for remaining powder and confirm that the cleaned parts are free of visible residue.
Clean the powder recovery bucket thoroughly to prevent cross-contamination
4.Lubrication Requirements After Machine Changeover
Lubricating the Machine Before Production
After a capsule filling machine changeover, operators should check the lubrication condition before restarting production. The machine may then enter another long period of high-intensity operation.
Before production starts, operators use an oil spray gun to lubricate the cams and moving components inside the machine housing. The specified lubricant for these areas is No. 00 grease.
Operators should apply the grease to the required moving areas and check that the lubrication is sufficient before starting the capsule filler. This maintenance step is performed after the changeover and before the next production run.
Protecting the Machine During Extended Shutdown
If the capsule filling machine will remain out of production for an extended period, operators need to protect exposed machine surfaces against rust.
The machine surface should be coated with No. 10 industrial white oil before extended shutdown. The oil forms a protective layer on exposed metal surfaces and helps prevent rust during storage.
Before restarting the capsule filler, operators should remove the protective oil from areas that may contact capsules or powder. The machine can then be cleaned, gesmeerd, and prepared for production according to the normal startup procedure.
Conclusie
Changeover Adjustment and Cleaning Checklist
| Changeover Item | Required Action | Main Check |
| Capsule mold | Replace matching upper and lower molds | Mold alignment |
| Feeding station | Replace turning board, sowing comb, and retainer | Capsule feeding |
| Filling rod | Replace matching filling rod group | Rod position |
| Doseerschijf | Replace or adjust according to capsule size and powder | Filling condition |
| Locking station | Adjust for the new capsule size | Capsulevergrendeling |
| Capsule outlet | Replace matching outlet | Capsule discharge |
| Vacuümsysteem | Adjust vacuum suction | Capsule-scheiding |
| Powder change | Adjust dosing gap with feeler gauges | Poeder lekkage |
| Product contact parts | Clean with water and 95% food-grade alcohol | Residue removal |
| Vacuum pump filter core | Remove, leeg, and blow clean | Vacuum suction |
| Recovery bucket and powder tray | Clean with water and 95% food-grade alcohol | Cross-contamination |
| Internal cams and moving parts | Lubricate with No. 00 grease | Lubrication condition |
| Machine surface during shutdown | Apply No. 10 industrial white oil | Roestpreventie |
A capsule filling machine changeover involves different actions depending on the production change. Changing capsule sizes requires replacement and adjustment of capsule handling and filling components.
Changing powder products with the same capsule size mainly requires dosing gap adjustment. Operators can use feeler gauges to check the clearance and confirm the setting during test production.
Cleaning should cover all product contact areas, the vacuum pump filter core, material recovery bucket, and powder collection tray. Na het schoonmaken, the capsule filler should be checked and lubricated before the next production run.
A clear changeover procedure gives operators a practical sequence for component replacement, aanpassing, schoonmaak, and lubrication.
FAQ
What Parts Need Replacement When Changing Capsule Sizes?
When changing capsule sizes, operators need to replace the matching upper and lower molds. The new mold set must match the target capsule specification.
The capsule feeding station also requires matching turning board, capsule sowing comb, and capsule retainer. The filling rod, doseerschijf, locking station, and capsule outlet also require corresponding replacement or adjustment.
The vacuum suction needs adjustment for the new capsule size. Operators should run test capsules after setup and check capsule separation, vulling, vergrendelen, en ontslag.
What Needs Adjustment When Changing Powder Products?
When the capsule size remains unchanged, the main adjustment is in the dosing area. Operators adjust the gap between the upper plate and the dosing disc according to the new powder characteristics.
Operators use feeler gauges to check the gap at different positions. Multiple gauges can be used when possible to speed up the adjustment process.
The gap must not be too small or too large. Excessive contact may cause machine resistance or stoppage, while excessive clearance may cause heavy powder leakage.
Which Parts Need Cleaning After Changeover?
The cleaning scope includes the hopper, doseerschijf, vulstaven, upper and lower molds, locking station, discharge station, and powder collection tray.
The material recovery bucket and vacuum pump filter core also require cleaning. These areas can retain powder from the previous batch.
Operators clean the relevant parts with clean water, blow them dry, wipe them with a clean cloth, and then use 95% food-grade alcohol for final wiping.
How Should the Vacuum Pump Filter Core Be Cleaned?
Operators first remove the filter core from the vacuum system. A vacuum cleaner is used to remove accumulated powder from the filter.
The remaining powder is then removed with an air gun. Powder buildup can block the filter and reduce vacuum suction.
Reduced suction may affect capsule separation on the capsule filler. The filter core should be cleaned before it is returned to service.
How Should the Capsule Filling Machine Be Lubricated After Changeover?
Vóór productie, operators use an oil spray gun to lubricate the cams and moving components inside the machine housing. These parts use No. 00 grease.
If the capsule filling machine will remain shut down for an extended period, operators apply No. 10 industrial white oil to exposed machine surfaces for rust protection.
The protective oil should be removed from relevant product-contact areas before production resumes.
Referenties
1. ONS. Food and Drug Administration — Current Good Manufacturing Practice
FDA — Huidige goede productiepraktijken (cGMP) Regelgeving
2. ONS. FDA — Drug Manufacturing Inspections
FDA — Drug Manufacturing Inspections
3. Europese Commissie — EudraLex-deel 4: EU-richtlijnen voor goede productiepraktijken
Europese Commissie — EudraLex-deel 4
4. WHO — Good Manufacturing Practices for Pharmaceutical Products
WHO — Good Manufacturing Practices for Pharmaceutical Products
