A softgel encapsulation machine forms two continuous shell ribbons, meters a liquid or semi-solid fill, and seals the materials into one-piece capsules. Its performance depends on precise synchronization between thermal control, ribbon handling, dosing, tooling, lubrication, and discharge.
For manufacturers comparing an automatic softgel encapsulation machine, understanding the machine's working principle is more useful than comparing maximum speed alone. The parts that control ribbon quality, fill accuracy, and seam formation directly influence output quality and usable yield.
This guide explains the machine in the same order that the product moves through it: working principle, main parts, machine types, specifications, quality implications, and maintenance.
What Is a Softgel Encapsulation Machine?
A softgel encapsulation machine is the central forming and filling unit in a softgel production line. It receives prepared shell mass and fill material, converts the shell mass into two ribbons, injects a measured dose between the ribbons, and uses rotary dies to form, seal, and cut individual capsules.
The machine is used in pharmaceutical, nutraceutical, food-supplement, and suitable cosmetic applications. Typical products include fish oil, vitamins, botanical oils, and qualified pharmaceutical formulations.
The encapsulator does not replace preparation, drying, inspection, or packaging equipment. It must operate as part of a controlled process. The encapsulation machine is only one part of the complete process. See our step-by-step softgel manufacturing process for gelatin preparation, fill preparation, drying, inspection, and packaging.
Softgel Machine Working Principle
The process follows a continuous path:
Gelatin service tank → Spreader boxes → Cooling drums → Die rolls and injection wedge → Capsule discharge → Conveyor → Tumble dryer
1. Feed the shell material
Conditioned shell mass is supplied from a service tank to two spreader boxes. The boxes regulate the amount of material delivered to each cooling drum.
2. Cast two gelatin ribbons
Each cooling drum converts the warm mass into a continuous ribbon. Drum temperature, surface condition, speed, and spreader-box settings influence ribbon thickness and uniformity.
3. Guide the ribbons toward the forming station
Rollers guide the left and right ribbons toward the rotary dies. The machine applies controlled lubrication to reduce sticking and friction.
4. Meter the fill
A dosing pump and plungers draw product from the fill supply and deliver a measured volume to the injection wedge. The pump cycle must remain synchronized with the die pockets.
5. Form, fill, seal, and cut
The matched die rolls pull the ribbons together. At the sealing point, the wedge introduces the fill between the ribbons. The die pockets form the capsule body while the die edges create the seam and cut the capsule from the web.
6. Discharge the capsules
Fresh capsules leave the dies and move toward the primary drying system. The remaining ribbon web is separated for controlled collection and handling.
Main Parts of a Softgel Encapsulation Machine
Gelatin service system
The service system holds the prepared shell mass under controlled conditions and supplies it to the encapsulator. Stable temperature, level, and residence time help prevent viscosity variation.
Spreader boxes
Two spreader boxes meter shell material onto the cooling drums. Their gap, temperature, level, and position influence ribbon thickness across the working width.
Cooling drums
The drums remove heat and set the shell material into flexible ribbons. Inconsistent cooling can create ribbons that are sticky, brittle, or uneven. Drum cleanliness and surface condition also matter.
Ribbon guide rollers
Guide rollers control the ribbon path and tension. Poor alignment can cause wrinkles, tracking problems, or unstable entry into the dies.
Die rolls
Die rolls contain matched cavities that determine capsule shape and size. Their geometry also contributes to cutting and seam formation. Accurate alignment is essential: a small mismatch can create uneven seams, tails, cut defects, or leakage.
Injection wedge
The wedge sits between the two ribbons at the forming point and directs the fill into each capsule pocket. Its position and validated operating condition influence fill placement and seam quality.
Metering pump and plungers
The pump converts mechanical or servo-controlled motion into repeatable fill delivery. Plunger condition, sealing, synchronization, and fill viscosity influence dosing consistency.
The user-provided URMACHINE model data specifies a dosing reference of 1.5 ml with ±1.5% for the listed configurations. This figure must be presented with the relevant model and test basis; it should not be generalized to every product and operating condition.
Lubrication system
Lubrication reduces friction between ribbons and machine surfaces. Too little lubrication can promote sticking and damage. Too much can contaminate the capsule surface or interfere with seam quality. System design differs by model, including micro-lubrication, independent pumps, and separate lubrication arrangements.
Drive and control system
The drive coordinates die rotation, dosing, ribbon feeding, and related motion. Depending on the model, control may be standard, touchscreen-based, or use a Siemens PLC. The control architecture should allow stable adjustment, clear alarms, and repeatable setup.
Discharge and conveyor system
Fresh capsules require gentle, continuous transfer. Poor discharge can cause pileups, deformation, or sticking before tumble drying.
Parts That Directly Affect Capsule Quality
| Machine Part | Quality Characteristic | Possible Defect When Unstable |
|---|---|---|
| Spreader box | Ribbon thickness | Thin walls, heavy shells, or uneven seams |
| Cooling drum | Ribbon temperature and flexibility | Sticking, wrinkles, or brittle ribbon |
| Die rolls | Shape, cut, and seam geometry | Leaks, double capsules, tails, or cut defects |
| Injection wedge | Fill placement and sealing conditions | Weak seams or incorrect capsule length |
| Pump and plungers | Fill volume | Weight variation or empty pockets |
| Ribbon guides | Tracking and tension | Misalignment or distorted capsules |
| Lubrication system | Release and surface condition | Sticking, excess surface oil, or seam interference |
| Discharge system | Gentle transfer | Deformation or clumping |
This relationship is useful during troubleshooting: the location and appearance of a defect often indicate which process zone should be inspected first.
Types of Softgel Encapsulation Machines
Laboratory and R&D machines
Laboratory equipment is intended for formulation trials, tooling evaluation, operator development, and small material quantities. Buyers should prioritize controllability, cleanability, and similarity to the intended scale-up process.
Small-batch commercial machines
Small production machines are suitable for limited market demand, specialty products, or factories that need flexible scheduling. Changeover efficiency can be more important than maximum speed.
Medium-capacity machines
These machines balance commercial output and flexibility. They may support a broader die width, additional plungers, touchscreen controls, or more automated systems.
High-output industrial machines
High-output machines use wider tooling, more plungers, and higher operating capability to support large-volume products. Stable continuous performance, material supply, downstream drying capacity, and maintenance planning become critical.
Single-die and multi-die configurations
Some systems use one die pair, while others use two die sets or expanded dosing arrangements. More forming capacity does not automatically deliver more saleable output; preparation, drying, inspection, and factory utilities must support the same throughput.
URMACHINE Softgel Machine Model Specifications
The following values are based on the parameter table supplied by the user. Reference output is tied to the stated capsule size and die-roll speed.
| Model | Die-Roll Speed | Die-Roll Size | Plungers | Reference Output |
|---|---|---|---|---|
| RGY2-15 | 1-3.5 rpm | Φ150 x 50 mm | 2 per side | 6,120 capsules/h at 1.5 rpm, 8# OV; 2,970 capsules/h at 1.5 rpm, 20# OB |
| RGY10-15II | 1-5 rpm | Φ150 x 250 mm | 10 per side | 120,960 capsules/h at 4 rpm, 8# OV; 55,440 capsules/h at 4 rpm, 20# OB |
| RGY10-15SF | 1-7 rpm | Φ150 x 250 mm / 6 x 10 in | 10 per side | 120,960 capsules/h at 4 rpm, 8# OV; 55,440 capsules/h at 4 rpm, 20# OB |
| RGY16-15V | 1-10 rpm | Φ150 x 250 mm | 16 per side | 241,920 capsules/h at 8 rpm, 8# OV; 110,880 capsules/h at 8 rpm, 20# OB |
| RGY16-15SF | 1-10 rpm | Φ150 x 250 mm / 6 x 10 in | 16 per side | 241,920 capsules/h at 8 rpm, 8# OV; 110,880 capsules/h at 8 rpm, 20# OB |
| HTMBRG1316DD | 1-7 rpm | Φ150 x 320 mm / 6 x 13 in | 16 per side | 232,000 capsules/h at 6 rpm, 8# OV |
Dimensions, power, and controls
| Model | Dimensions | Power | Weight | Main Drive / Control |
|---|---|---|---|---|
| RGY2-15 | 1,400 x 800 x 1,750 mm | 2 kW | 600 kg | Standard |
| RGY10-15II | 2,250 x 1,250 x 2,120 mm | 2 kW* | 1,900 kg | Touchscreen |
| RGY10-15SF | 2,300 x 1,550 x 2,450 mm | 15 kW | 1,900 kg | Siemens PLC |
| RGY16-15V | 2,250 x 1,250 x 2,150 mm | 12 kW | Not stated | Touchscreen |
| RGY16-15SF | 2,300 x 1,530 x 2,450 mm | 15 kW | Not stated | Siemens PLC |
| HTMBRG1316DD | 2,400 x 1,250 x 2,200 mm | 18 kW | Not stated | Siemens PLC |
*The asterisk attached to the RGY10-15II power value is retained because the source table shows “2 kW*.” Its note should be confirmed before the figure is used in a quotation or engineering utility schedule.
How to Interpret Softgel Machine Specifications
Die-roll speed
Speed indicates the available operating range, not the guaranteed production setting for every product. Higher speed changes ribbon cooling time, dosing frequency, sealing behavior, and downstream load.
Die-roll size
Diameter and working width influence tooling capacity and the number of pockets that can be arranged. Actual output also depends on capsule geometry and pocket layout.
Number of plungers
More plungers can support wider tooling and greater dosing capacity. Uniform pump condition and synchronization remain essential.
Reference output
Reference output is a conditional figure calculated or observed for a named capsule and speed. It should not be presented as universal stable output.
Rated, tested, and stable production capacity
- Rated capacity describes a supplier's defined machine capability under specified assumptions.
- Reference capacity links output to a sample capsule, tooling arrangement, and speed.
- Tested capacity is demonstrated during a controlled trial with documented materials and conditions.
- Stable production capacity is the repeatable saleable output achieved over an agreed production period, including quality performance.
Buyers should ask which definition applies to every number in a quotation.
Power and utilities
Installed power is only part of the utility review. A project may also require chilled water, compressed air, ventilation, temperature control, humidity control, and power for preparation and drying equipment.
Machine Specifications and Their Selection Implications
A specification describes the machine; it does not select the machine for the buyer. Selection requires matching each specification to the project:
- A high-value fill makes dosing consistency and material loss especially important.
- Multiple capsule formats increase the importance of tooling cost and changeover time.
- Suspensions require stable mixing, transfer, and dosing.
- Plant-based shells require confirmed process compatibility.
- Large single-product campaigns require continuous operating stability and downstream capacity.
The separate URMACHINE machine-selection guide turns these factors into a capacity formula, comparison matrix, and supplier checklist.
GMP, Safety, and Documentation Considerations
Equipment evaluation should address:
- Product-contact materials and surface condition
- Access for cleaning and inspection
- Prevention of cross-contamination
- Guards, interlocks, and emergency stops
- Calibration requirements
- Electrical and mechanical documentation
- Operating, cleaning, and maintenance instructions
- FAT, SAT, and qualification support where required
- Spare-parts identification and traceability
Claims of compliance should be supported by the actual machine construction and project documentation.
Softgel Machine Maintenance
Daily checks
Inspect contact surfaces, ribbon paths, spreader boxes, cooling drums, dies, pump behavior, guards, alarms, and lubrication. Clean according to the approved procedure.
Periodic checks
Verify fasteners, alignment, seals, bearings, sensors, drive components, and utility connections. Trend wear rather than waiting for visible failure.
Die-roll replacement
Die rolls should not be replaced on an arbitrary universal schedule. Replacement or refurbishment depends on cavity and cutting-edge wear, alignment, material, maintenance, product precision, and inspection results. A tool that no longer produces a qualified seam or cut should be removed from service even if it has not reached a planned time interval.
Pump and plunger maintenance
Inspect for wear, leakage, sticking, and loss of repeatability. Recalibrate after relevant maintenance or part replacement.
Frequently Asked Questions
What does a softgel encapsulation machine do?
It casts two shell ribbons, meters the fill, and uses rotary dies to form, fill, seal, and cut one-piece capsules.
Can one machine produce different softgel shapes?
Yes, when compatible tooling is available. Shape, dose, pocket layout, wedge configuration, and validated process conditions must be considered together.
What determines actual production capacity?
Tooling layout, capsule size, die speed, fill behavior, ribbon stability, quality yield, operating time, and downstream drying capacity all contribute.
Can a softgel machine process plant-based shells?
Only when the selected machine, tooling, control range, and process have been confirmed for the chosen shell formulation. “Plant-based” is not one universal material.
How often should die rolls be replaced?
Use documented inspection and performance criteria rather than a fixed universal interval. Seam quality, cutting behavior, dimensional accuracy, wear, and repair history should guide the decision.
What supporting equipment is needed?
Most commercial projects require shell and fill preparation equipment, primary and secondary drying, inspection, utilities, and suitable packaging.
Evaluate the Machine as a Complete Process
A softgel encapsulator should be evaluated by the quality and usable output it can sustain, not by nominal speed alone. Ribbon control, tooling, dosing, sealing, discharge, drying capacity, documentation, and maintenance support determine whether a machine fits the project.
Review URMACHINE softgel machine models and send your product type, shell material, fill characteristics, single-capsule dose, desired shape, target output, destination country, and factory status for a technical configuration discussion. Explore our full range of solutions directly on the softgel machine product page.
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