Features Functionality Software Specifications Options
Raw Data Plot Compaction Profile Force-Thickness Plot Dwell Time
New Product Announcement: Bi-layer Presster
Demonstration and inspection (via Skype or in person) can be arranged. Click here for more information.
Presster is more than a Compaction Simulator. It is a Linear Mechanical Replicator of any Rotary Tablet Press.
It will allow you to to easily test any formulation under high speed manufacturing conditions, one tablet at a time, using a very small amount of powder. The system has a full spectrum of scientific tools necessary to optimize and scale-up tablet formulations: compaction and ejection profiles, elastic recovery, Heckel analysis, take-off forces to study sticking, adhesion, capping and lamination. All reports and graphs are in MS Excel format.
Standard IPT B tooling, upper and lower compression rolls, ejection cam, take-off bar, variable speed motor controller, tablet weight and thickness adjustments and overload protection mechanism.
A choice of interchangeable compression rolls (and, optionally, precompression rolls) to mimic the loading pattern of any rotary tablet press, with easy changeover mechanisms.
Instrumentation to measure precompression, compression, ejection, take-off and die wall forces, punch displacement, and press speed.
Manual or automatic (gravity force) feed shoe mechanism.
Computerized adjustment of depth of fill (tablet weight), lower wheel position (tablet thickness), and press speed (in terms of dwell time).
Pentium computer and color printer for scientific reports and plots.
State-of-the-art software with a comprehensive database of parameters for various tablet presses, to match dwell times and compression profiles.
Comprehensive user manual, technical documentation, and validation protocol.
Make tablets with up to 50 kN compression force at a user specified speed (dwell time).
Display compression waveform and peak force, peak offset time, decompression time, dwell time, contact time, and other measurements.
Measure punch displacement, calculate tablet volume, elastic recovery, work of compaction, and display Heckel or stress vs. strain plots.
input of tablet weight in g or mg, tablet thickness and diameter in mm or
inches, and hardness in kP, SCU, or N.
Display an array of scientific
plots and reports that are widely used in formulation development. Display compressibility profile
where each point corresponds to compression and hardness for each tablet made,
or sample average. This plot can be converted into tensile strength vs.
Display an array of scientific plots and reports that are widely used in formulation development.
Display compressibility profile where each point corresponds to compression and hardness for each tablet made, or sample average. This plot can be converted into tensile strength vs. compression pressure.
|Maximum compression force||50 kN|
|Maximum precompression force||10 kN|
|Maximum depth of fill||17.4 mm|
|Maximum tablet thickness||8 mm|
|Tooling||TSM/Euro, B type, any shape and size (D type is optional)|
|Number of stations||1|
|Maximum punch velocity
(in horizontal plane)
|Minimum dwell time||5.8 ms|
|Minimum punch velocity
(in horizontal plane)
|Maximum dwell time||230 ms|
|Die feeding||manual or force feed shoe|
|Maximum output||2 tablets / minute|
|Drive motor nominal speed||1800 RPM|
|Drive motor power||7.5 HP|
|Electricity requirements||208-220 V, 3 phase,
40 A, 50/60 Hz
|Pressure rolls diameter||7.5" - 14" (user specified)|
|Machine installation||on casters|
|Machine base width (standard)||103"|
|Machine base depth (standard)||32"|
|Machine height (standard)||83.5"|
|Machine weight (approximately)||2.5 tons (25 kN)|
|Computer||Pentium IV 1.3 GHz Industrial|
|Standard Instrumentation measurements||Upper compression force
Upper punch displacement
Lower punch displacement
|Optional Instrumentation measurements||
Lower compression force
Dwell Time Calculations for Scale-Up of Tableting Process
To compute a dwell time for any press, we use the following formula:
DT (msec) =
PHF · NP ·3,600,000
π · PCD · TPH
Where PHF = 12.7 mm (Punch Head Flat of the TSM-B )
NP = Number of Stations
π = 3.141
PCD = Pitch Circle Diameter of the turret
TPH = press speed in terms of Tablets Per Hour
The following graph represents the dwell time ranges for different R&D and production presses. The fastest presses, such as Fette, can achieve dwell times of about 5 ms. All high speed production presses are normally run at dwell times well under 10 ms. This is well within the range of a Manesty Betapress or MCC Presster™, but other research presses such as Korsch XL100 or Riva Piccola do not compare. Presster™ can reach the dwell time of 5.8 ms (as calculated on the basis of 12.7 mm PHF).
Linear Speed Comparisons for Rotary Tablet Presses
To avoid any misunderstanding regarding the dwell time definition, it is best to compare ranges of press speeds in terms of linear speed in horizontal plane. The following graph makes such comparison clear. Note that typical production ranges of linear speed are between 1500 to 2000 mm/s.
It is the linear speed (rather than the changes in dwell time at the same speed, e.g. by changing tooling geometry) that has a demonstrated effect on compaction process for strain-rate sensitive products.