TDP 1.5 TABLET PRESS Machine User Manue
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TDP 1.5 DESKTOP TABLET PRESS
The TDP 1.5 tablet press is a versatile, single punch desktop format tablet press that has been
designed to meet the needs of developmental and research laboratories across a wide range of
The principal features of the TDP 1.5 include an ability to run on either electricity or manual pow-
er, the ability to operate with as little as 200g of raw materials, and the ability to customise tablets
by easily changing the die used to stamp them. Combined, these features allow the user to press
small runs of unique tablets for research purposes, or to scale up production to as much as 5,000
tablets an hour.
The TDP 1.5 is very simple to use, and has been designed to require only basic maintenance. It
is primarily intended for pressing granular materials, but is compatible with a wide range of raw
materials. It is not suited to wet materials or superfine powders.
The machine can be used to produce most types of tablet, including tablets with irregular shapes.
Users can also vary the density, thickness and size of the tablets pressed.
Maximum Pressure 1.5 T (15Kn)
Maximum Diameter of Tablet 8mm
Maximum .Depth of Fill 16mm
Max. Thickness of Tablet 6mm
Production Capacity 5000pc/h
Power 0.75 Kw (single phase) 0.55 Kw
Overall Size 650x440x650mm
The machine should be installed by fixing it to a secure workbench using three pairs of M12 foot
screws. To allow convenient operation, the top of the bench should be at a height of approxi-
mately 60 cm above floor level.
An access hole approximately 3.5cm in diameter should be cut into the workbench to allow for
Before operating, disassemble the V-belt and ensure the motor is rotating in the direction indicat-
ed by the arrow on the gearwheel shield
BEFORE SWITCHING ON THE MACHINE ALWAYS
PEFORM ONE FULL ROTATIONAL CYCLE BY HAND
The TDP 1.5 is switched on by pressing the on/off switch on the left hand side of the machine.
Filling the Machine
Fill the tablet press by adding granular or powdered raw materials to the hopper. The maximum
capacity of the hopper is approximately 1/2kg, depending on the raw material used. Avoid moist
or superfine materials.
ADJUSTING TABLET SIZE
Tablet size and shape are determined by the die being used. To change the die, see below.
Tablet thickness is determined by the fill depth. To change the fill depth, see “Adjusting fill
CHANGING/INSTALLING A PUNCH DIE
The TDP 1.5 die assembly consists of three separate pieces; the upper and lower punches, and
the centre ring. To change an existing die you remove all three parts before reassembling with the
new die assembly.
To make access easier, it is helpful before you start to remove the tablet chute. Do this by un-
screwing the two Phillips head screws, one on either side. It also helps to remove the metal boot
located to the right of the die assembly. Use an allen key to remove the boot’s central locking nut,
then release the boot by loosening the securing nut beneath the machine. Pliers or metal grips
will make this easier.
Next, there are two nuts and a bolt that you need to loosen before you can remove any existing
die and install a new one. There is one nut at the front for each of the punches, and a bolt for the
centre ring. After removing these, if there is already a die installed, pull out the upper punch.
To remove the centre ring (if already installed) raise the ejection height mechanism to its fullest
extent. First remove the bar to the right of the ejection mechanism that secures it, then screw the
mechanism clockwise to force the centre ring up.
Remove the lower punch, if it has not come out with the centre ring.
ASSEMBLING AND ADJUSTING THE DIE
To install the new die first insert the lower punch. Ensure the V shape is pointing forward, then
securely tighten the nut that holds the punch in place.
Next insert the new centre ring, taking care to ensure that it is seated cleanly and is flush with the
die plate. Then tighten the nut holding it in place, and check that it is secure.
Before inserting the new upper punch, slip the locking nut over it, to avoid difficulty fitting it at
the end of the installation. Once the punch is in place, securely tighten its bolt.
Use the handwheel to move the machine to a point in its cycle where you can reattach the boot.
Securely tighten the locking nut with the allen key.
Reattach the chute, and tighten both screws securely.
ADJUSTING EJECTION HEIGHT
If the ejection height is too high or low, the tablets will not be ejected cleanly. To adjust the ejec-
tion height, first ensure that the machine is at the highest point in its cycle by rotating the hand-
wheel slowly. The ejection height can be raised by removing the bar to the right of the ejection
mechanism that secures it, then screwing the mechanism clockwise to raise the centre ring.
To lower the ejection height, carry out the same procedure but turn counter clockwise.
After adjusting, raise the lower punch and check it is level with the die surface. Then rotate the
handwheel for several revolutions, to check the ejection mechanism is running cleanly.
ADJUSTING FILL DEPTH
The fill depth determines the weight of the tablet. To change the depth, unscrew the adjusting
pinion and bolt, and rotate clockwise to slightly raise the lower plunger. This will reduce the fill
depth, and therefore tablet weight.
To increase fill depth and weight, simply lower the plunger by rotating counter clockwise.
Then re-tighten all parts.
ADJUSTING TABLET HARDNESS
Greater pressure produces a denser and therefore harder tablet. To increase the pressure applied,
unscrew the connecting rod nut and rotate the upper plunger clockwise. To reduce the pressure,
rotate it counter clockwise.
Replace nuts and tighten securely with a wrench.
Disassembling and Reassembling Main Parts
To remove the die plate pull out the powder baffle, remove the hopper, unscrew the feeder set-
screw, remove the feeder stud and spring, then take the feeder out and unscrew the die plate.
To reassemble, simply apply the above in reverse. When assembling, take care to align the feeder
screws, to avoid damaging their thread.
PULLEY, PINION AND PINION SHAFT
Disassemble the pressing plate, then remove the V-belt, and the nut and washer on the pinion
shaft. Grasping the pulley, remove the pinion shaft from its hole. When disassembling, always
take care with the pinion copper brushing.
To reassemble, repeat in reverse.
Remove the gearwheel shield, pulley, and gearwheel gland, strike a non-active surface on the in-
side of the gearwheel with a wooden mallet to loosen it, and remove the gearwheel. Remove the
tapered gland and handwheel, then the feeder rod and feeder cam. Loosen the pitman pin, catch
the bolt and remove the pin. Strike the end of the gearwheel shaft with a wooden mallet (taking
care not to damage the thread). Grasping the other end of the main shaft, pull it out.
Note: When in operation, monitor the quality of the tablets being produced. If they are of un-
even thickness, have raw edges, or other defects, inspect the die carefully.
Maintenance & Lubrication
Before using the machine each time, check that the handwheel turns freely.
Visually inspect the machine and check that all parts are securely attached, and all nuts and bolts
are completely secure.
Pay particular attention to moving parts. If they appear worn, repair or replace them before using
the tablet press.
MAINTENANCE AFTER USE.
When you have finished using the machine clan away all remaining powder, and remove and
clean the die.
If the machine is going to be left unused for an extended period, place the die in safe storage to
avoid rust, clean the machine thoroughly and apply an anti-corrosive grease to protect it.
Note: To clean the die when in use without disassembling, or when changing between differ-
ent tablet materials, apply magnesium stearate powder and operate by hand slowly to work it
To ensure safe operation and the long life of the machine, care must be taken to properly lubri-
cate moving parts, friction surfaces and oil holes. After lubricating, run the machine at idle to
allow the oil to properly circulate.
Avoid applying too much lubricant in one go, as this may cause leakage and damage tablet qual-
The main shaft, eccentric wheel housing, top end of the pinion shaft, groove and roller inside the
gearwheel, groove and roller of the feeding cam, and gearwheel surface should all be lubricated
The connecting rod oil hole, vibrating pivot of the feeding rod, surface of the upper punch man-
drel, and surface of the lifting rod should all be lubricated using a suitable engine oil.
Check all lubrication points are properly lu-bricated, and all bolts and nuts are securely tightened.
Jumping or broken tablet
Check tablet ejection is clean, and if not,increase ejection clearance by adjusting the lower punch.
Rough or damaged tablet
The tablet may be sticking. Ensure the raw material is dry and contains only proper ingre-dients.
Alternatively, check that the die is not dam-aged or worn.
Either increase the pressure to improve com-paction; or adjust the raw materials to ensure sufficient binding material.
Tablet weight is inconsistent
This could be due to a loose lower punch –check and tighten.
Contact Person: Miss. linda