There are two types of multi-station press machine:
1. Single Feed System: This type of machine has-
-One hopper
-One discharge chute
This type of compression machine compresses one tablet by an individual punch in a complete round. If a single hopper compression machine having 33 punches compresses 33 tablets in a round.
2. Double Feed System: This type of machine has-
-Two hopper
-Two discharge chute
This type of compression machine, two tablets are compressed by each punch in the complete round. If a double hopper compression machine having 33 punches, 66 tablets are compressed in a complete round.
To calculate the capacity of the compression machine following parameters are required,
• Number of punches
• Revolution per minute (rpm)
• Number of feed system
Number Of Punches: Some general types of compression machine on basis of the number of punches are
• 17 Punch Compression machine
• 19 Punch Compression machine
• 23 Punch Compression machine
• 33 Punch Compression machine
• 37 Punch Compression machine
Revolution per minute (rpm)
- Revolutions per minute is the speed of the compression machine in one minute.
- Revolution per minute is the measure of rounds completed by a turret of a compression machine in one minute.
- Fast running machine’s rpm is calculated by the Teko meter.
Number of feed system
- Single hopper machines are single feeding machines.
- Double hopper machines are double feeding system machines.
The following formula is used to calculate the compression machine capacity.
Per Minute
Machine Capacity = Number of punches × rpm × Number of feed system
Per Hour
Machine Capacity = Number of Punches×rpm×Number of feed system×60
Suppose we have a compression machine having 35 punches and running at 30 rpm. The machine has a double feed system and capacity is calculated by putting values in the formula as follows,
Number of punches × rpm × Number of feed system
35×30×2=2100 Tablets/min
It means 2100 tablets are compressed in one minute.
For one hour multiply it by 60 and answer is as follow
2100 × 60 = 126000 tablets/hr
It means 126000 tablets are compressed in one hour.
Read also: Hopper Capacity Calculation in Pharmaceutical Industry
But in the Multi-Tip Punch System we follow the same formula and multiply to the Number of Tips per Punch)
Look the Formula -
Machine Capacity = Number of Punches × rpm × Number of feed system × Number of Tips per Punch × 60
e.g.,
Let's say we have a machine with:
• 33 Stations (Punches)
• 6 Tips per Punch (Multi-tip)
• 80 rpm
• Single Feed System (1 Tablet per cycle)
Tablet Output =
33 x 80 x 1 x 6 x 60 = 950400
How to calculate the capacity of Tablet Press Machine that produces Bi-layer Tablet?
This machine has 2 Feed system but 1 Discharge chute. So each punch produce 1 Tablet per cycle.
Therefore, it is treated as a Single Feed System Machine.
Read also: Dwell Time Calculation Formula
Resource Person: Galal Allam Ghazi
Very informative.
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