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Rotary Tablet Press

Product Overview

 

The Industrial Rotary Tablet Press is a heavy-duty continuous compression machine engineered to convert granulated powders into uniform tablets at high speeds. Operating via a precision-machined rotating turret housing multiple sets of upper and lower punches and dies, the system regulates fill depth, executes pre-compression to evacuate trapped air, and applies primary tonnage. Built with a cast-iron structural base and a fully enclosed 316L stainless steel operational chamber, it complies with standard sanitary manufacturing requirements for pharmaceutical solid dosage lines, nutraceutical production, and industrial powder compaction.

 

 
 
Working Principle

The rotary compression cycle operates through five continuous, synchronized mechanical stages:

Powder Feeding:

Granulated formulation flows from the gravity or forced-feed hopper into the feed frame, uniformly filling the die cavities as they pass beneath.

01

Weight Regulation:

The lower punch travels to a preset depth over a dosing cam, scraping off excess powder to ensure accurate fill volume and target tablet weight.

02

Pre-Compression:

The upper and lower punches pass between pre-compression rollers, applying a lower initial tonnage to eliminate trapped air within the powder matrix and prevent capping or lamination.

03

Main Compression:

The punches pass through the main compression rollers, delivering the specified full compaction force (20 to 100 kN depending on model) to bond particles into a solid tablet.

04

Ejection & Take-Off:

The lower punch raises to push the finished tablet flush with the die table surface, where a stationary takeoff blade deflects the tablet into the discharge chute.

05

 

Key Features

 

Turret Assembly: Forged from high-grade ductile iron or 4340 alloy steel, stress-relieved and hard-chrome plated to resist surface wear and corrosion.


Forced Feeding System: Independent servo-driven paddle feeders maintain consistent powder density in high-speed operations, eliminating weight variance in fine or cohesive formulations.


Centralized Lubrication: Automated micro-lube delivery system pumps metered grease to upper and lower punch tracks and main bearings while isolating lubricant from the compression chamber.


Modular Control Architecture: Industrial PLC paired with a touchscreen HMI provides real-time monitoring of compression force, turret speed, rejection rates, and alarm logs.


Quick-Change Tooling Interface: Removable die table segments and tool-free feeder removal reduce complete format changeover times to under 45 minutes.

 

ZP9 Tablet Press

 

Configuration & Components

Compression Zone: 316L stainless steel product-contact surfaces with mirror-finished surface roughness (Ra <= 0.4 um) to prevent powder adhesion and cross-contamination.


Drive Train: Helical ground gearboxes driven by AC inverter motors, delivering smooth torque transmission with noise levels below 75 dB(A) at full operation.


Hydraulic Overload Protection: Integrated hydraulic cylinder on the upper main roller instantly relieves pressure if an over-fill event occurs, protecting punches and the turret from structural damage.


Electrical Enclosure: NEMA 4X / IP65 stainless steel control cabinet featuring industrial electrical components and internal climate conditioning.

 

Technical Specifications

 

Technical Parameter

Model RTP-27

Model RTP-37

Model RTP-45

Tooling Type

D / B Interchangeable

B / BB Interchangeable

BB / B Interchangeable

Number of Stations

27

37

45

Max. Tablet Pressure

100 kN

80 kN

60 kN

Max. Pre-Compression

20 kN

15 kN

10 kN

Max. Tablet Diameter

25 mm

16 mm

13 mm

Max. Depth of Fill

18 mm

15 mm

15 mm

Max. Output (Tablets/hr)

110,000

220,000

320,000

Turret Speed (RPM)

10 to 70

10 to 90

10 to 120

Total Power Consumption

7.5 kW

11 kW

15 kW

Machine Dimensions (mm)

1150 x 1100 x 1750

1250 x 1200 x 1800

1350 x 1300 x 1850

Net Weight

2200 kg

2600 kg

3100 kg

 

 
 
Applications

Pharmaceutical Solid Dosage:

Production of immediate-release, extended-release, and multilayer pharmaceutical tablets meeting uniform quality requirements.

Dietary Supplements & Nutraceuticals:

High-throughput manufacturing of vitamin complexes, herbal extracts, amino acid tablets, and chewable formulations.

Effervescent Formulations:

Specialized tooling setups with low relative humidity containment for rapid-disintegrating effervescent cleaning tablets and pharmaceutical fizzy tablets.

Industrial & Chemical Processing:

Compaction of catalysts, ceramic powders, salt briquettes, and detergent cakes under high-tonnage requirements.

 

 

Model Selection / Configuration Options

Selecting the appropriate rotary press depends on your formulation's flowability, batch size, and tablet geometry:


Tooling Standard Selection: Choose D Tooling for large diameter tablets (greater than 16 mm) and high compaction force requirements. Choose B or BB Tooling for smaller diameters, high-speed multi-tip execution, and maximum output per minute.


Containment Packages: Available with O-ring sealed acrylic windows and negative pressure air-purge seals for handling specialized compounds.


Weight Sorting Integration: Direct interface compatibility with downstream online weight sorters to automatically reject out-of-tolerance tablets based on feedback loops from the main compression load cells.

Medicine Tablet Making Machine

 

 
Manufacturing & Quality Control
 
01/

Machining Precision: Turrets and cam tracks are machined on 5-axis CNC machining centers holding dimensional tolerances within plus or minus 0.005 mm to ensure uniform punch dwell time and eliminate weight variation across all stations.

02/

Material Traceability: All stainless steel sheet metals and structural castings are supplied with standard material test reports verifying chemical composition and mechanical strength.

03/

Inspection Protocol: Every press undergoes a continuous dry-run test under simulated load. Compression force consistency, runout tolerances of the upper and lower punch guides, and vibration levels are verified using precision measurement tools prior to crating.

04/

Documentation Package: Delivered with a complete technical documentation bundle including assembly schematics, factory testing records, and material compliance certificates.

 

Customization & Integration
 

Multilayer Tablet Capabilities:

Configurable with dual or triple feeder decks for producing bi-layer or tri-layer formulations with clear layer demarcation.

Plant Network Connectivity:

Integration-ready via standard industrial communication protocols for plant-wide data acquisition and batch record generation.

Custom Feed Frame Geometries:

Tailored paddle designs (spiral, open-pocket, or gravity-assist) engineered specifically for cohesive or poor-flowing direct-compression powder blends.

 

 

FAQ

 

 

Q: How do you prevent powder sticking and punch binding during high-speed runs?

A: Tooling bores are honed to mirror finishes and fitted with scraper seals to prevent fine particle migration into the punch guides. For sticky formulations (such as high-extract botanical powders or hygroscopic active ingredients), we recommend optional surface-coated punches, alongside internal cooling channels inside the turret body to dissipate frictional heat.

Q: What is the procedure for format changeovers, and how long does it take?

A: A complete format changeover—including removal of the gravity feeder, feed frame, upper/lower punch sets, and die table—takes between 35 to 45 minutes for trained operators. The machine features a hydraulic die-table lifting mechanism and quick-release clamps that eliminate the need for specialized hand tools during teardown.

Q: How does the machine handle weight control for low-dosage active ingredients?

A: The press integrates high-precision load cells on both the pre-compression and main compression stations. When weight drift is detected due to variations in powder bulk density, the control system automatically adjusts the lower dosing cam depth via stepper motors in real time to maintain tablet weight within plus or minus 1% limits.

Q: What utilities and facility conditions are required to operate this press?

A: Standard operation requires a 3-phase power supply (380V/415V/480V, 50/60Hz), compressed air at 0.6 MPa (150 L/min) for air-purge seals and pneumatic rejection, and an environmental relative humidity below 45% RH for moisture-sensitive formulations. Dust extraction ports require a negative pressure connection of at least -2.0 kPa.

Q: What technical documentation is provided with the equipment?

A: Each unit ships with a comprehensive documentation package comprising technical specifications, factory test reports, material certificates for product-contact metals, and calibration records for load cells and sensors.

Q: What is the standard lead time and warranty coverage?

A: Standard single-layer models have a manufacturing and factory testing lead time of 10 to 12 weeks. Custom multi-layer configurations require 14 to 16 weeks. The equipment is backed by a 12-month mechanical warranty covering structural components and gearboxes, supported by remote technical troubleshooting and worldwide field service dispatch.

We're well-known as one of the leading rotary tablet press manufacturers and suppliers in China. With abundant experience, we warmly welcome you to buy high quality rotary tablet press for sale here from our factory. For price consultation, contact us.