Adjustment operation and precautions of single stamping sheet machine

Installation and adjustment of tablet press

1) The tablet press is installed on a sturdy wooden workbench (or can also be installed on a cement platform) and fixed with three pairs of M12 foot screws. The height from the workbench to the ground is about 600 millimeters (by hand, easy to operate).

For the convenience of disassembly and repair, in wood1There should also be a hole with a diameter of about 35 millimeters at the position corresponding to the lower punch rod on the workbench.

2)Before connecting the motor power supply, the motor should be grounded properly to ensure safety. First, remove the V-belt, connect the motor power, and start the motor to observe whether the rotation direction of the motor is correct (the rotation direction of the motor shaft should be opposite to the direction of the arrow on the protective cover or handwheel). If the rotation direction is incorrect, connect the wires separately. Then install the V-belt.

Installation and adjustment of 2 tablet press molds

1) Installation of stamping dies

(1) Install downward flushing

Loosen the lower punch fixing screw, turn the handwheel to raise the lower punch core rod to a high position, insert the lower punch rod into the hole of the lower punch core rod (pay attention to aligning the notch slope of the lower punch rod with the lower punch fastening screw and inserting it to the bottom), and then tighten the lower punch fixing screw.

(2) Install the upper punch

Loosen the upper punch fastening nut, insert the upper punch rod into the hole of the upper punch core rod, insert it to the bottom, use a wrench to clamp the hexagonal lower part of the upper punch core rod, and tighten the upper punch fastening nut.

(3) Install the middle mold

Loosen the fixing screws of the middle mold, place the middle mold flat into the hole of the middle mold platform (while punching it down into the hole of the middle mold), press it to the bottom, and then tighten the fixing screws of the middle mold. When placing the middle mold, it is important to keep it flat to avoid getting stuck when tilted and damaging the hole wall.

(4) Rotate the handwheel by hand to slowly lower the punch into the middle mold hole, and observe for any collision or friction. If collision or friction occurs, loosen the fixing screws (two) of the middle mold plate, adjust the position of the fixing of the middle mold plate, so that the punch enters the middle mold hole, and then tighten the fixing screws of the middle mold plate. Adjust in this way until there is no collision or friction when the punch enters the middle mold, and then the installation is qualified.

2) Adjustment of Film Production

Rotate the handwheel to raise the punch to a high position and observe whether the punch mouth surface is aligned with the middle mold plane (whether it is high or low will affect the chip output). If it is not aligned, loosen the butterfly screw, loosen the gear pressure plate, rotate the upper adjustment gear to make the lower punch surface aligned with the middle mold plane, and then continue to press the pressure plate on and tighten the butterfly screw.

At this point, shake the handwheel by hand and run the empty car for more than ten revolutions. If the machine is running normally, you can add materials for pressure testing. Make the next adjustment.

3) Adjustment of filling depth (i.e. adjustment of tablet weight)

Loosen the butterfly screw, loosen the gear pressure plate, rotate the lower adjustment gear, turn it to the left to raise the lower punch rod, and the filling depth will be reduced (the weight of the tablet will be reduced). On the contrary, turning right increases the filling amount. After adjustment, still press the gear pressure plate and tighten the butterfly screw.

4) Adjustment of pressure (i.e. adjustment of tablet hardness)

Loosen the connecting rod locking nut, rotate the upper punch rod, and turn it to the left to move the upper punch rod downwards. This will increase the pressure and hardness of the pressed pills; On the contrary, turning right reduces pressure and lowers the hardness of the pill. After adjustment, use a wrench to hold the hexagonal lower part of the punch rod and still tighten the connecting rod locking nut.

At this point, the adjustment of the punching die is basically completed. Then start the motor to test more than ten pieces, check the weight, hardness, and surface smoothness of the pieces, and if they are qualified, they can be put into production. During the production process, it is still necessary to check the weight of the pills at any time and adjust them in a timely manner.

disassemble

Dismantling of the stamping die of the tablet press machine

(1) Loosen the upper punch fastening nut to pull out the upper punch rod. If the fit is tight, you can use pliers to clamp the upper punch rod and pull it out, but be careful not to damage the punch edge.

(2) Disassemble the middle mold

Loosen the fixing screws of the middle mold, unscrew the downward punch fixing screws, loosen the butterfly screws, and loosen the gear pressure plate. Rotate the adjusting gear to raise the lower punch core rod by about ten millimeters, gently turn the handwheel to push out a part of the middle mold with the lower punch core rod, and remove the middle mold by hand. If the middle mold fits tightly in the hole, do not forcefully rotate the handwheel hard top to avoid damaging the parts. At this point, it is necessary to remove the middle mold plate and then take out the middle mold.

(3) Disassemble and punch down

First, unscrew the down punch fixing screw, then turn the handwheel to raise the down punch to the high position, and you can use your hand to pull out the down punch rod. If the fit is tight, it can be clamped with pliers (be careful not to damage the edge of the punch).

（4）After disassembling the die, it is necessary to rotate and adjust the gear to retract the lower punch rod by about 10 millimeters. When rotating the handwheel, the top of the lower punch rod should not be higher than the bottom surface of the middle die platform when it is raised to the highest position (this step should be noted to prevent the lower punch rod from colliding with the middle die during use). Then continue to tighten the downward fixing screw.

Dismantling and installation of the main components of the tablet press

1. Medium mold plate

Disassembly: Pull out the baffle, remove the hopper, unscrew the feeder fastening screw, unscrew the feeder fixing screw and spring, remove the feeder, unscrew the fixing screw and spring washer of the middle mold plate, and then remove the middle mold plate. Installation: Follow the reverse order mentioned above. When tightening the screw of the feeder, pay attention to aligning it to avoid damaging the screw hole of the feeder.

2 upper punch core rod

Disassembly: Loosen the locking nut of the connecting rod, rotate the upper punch rod to disengage from the connecting rod, turn the handwheel to raise the eccentric wheel housing to the high position, and rotate the eccentric wheel housing to swing the connecting rod to the front upper position. Then, the upper punch rod can be extracted from above the mold frame hole. Installation: Follow the reverse order mentioned above.

3 punch core rods

Disassembly: Unscrew the down punch fixing screw, butterfly screw, and gear pressure plate, rotate the adjusting gear to lower the down punch core rod and remove it from the bottom hole of the machine body. Installation: Follow the reverse order mentioned above.

4-link linkage

Disassembly: First remove the upper punch rod, then remove the steel wire retaining ring on the connecting rod pin, and take out the connecting rod pin to remove the connecting rod. Installation: Follow the reverse order mentioned above.

5 large pulleys, small gears, and bridge shafts

Disassembly: Remove the V-belt, unscrew the nut and washer on the right end of the bridge shaft (inside the machine body), hold the large pulley firmly by hand, and then extract it together with the small gear and bridge shaft. Then, the bridge shaft can be extracted from the wheel hole. The large pulley, small gear, and shaft sleeve are pressed together and generally do not need to be disassembled.

Installation: Follow the reverse order mentioned above.

6 main axes

Disassembly: Two people should be responsible for disassembling the spindle. Firstly, remove the large pulley, then unscrew the nut to remove the lever, lever shaft, and filling roller (if necessary, remove the handwheel and filling cam), remove the protective cover, unscrew the screws and washers, use a wooden hammer to tap the non working surface on the inside of the large gear (do not re tap) to remove it (be careful not to lose the lifting roller), and then use a wooden hammer or copper rod to tap the shaft end (be careful not to damage the screw hole on the shaft end), while firmly holding the other end of the shaft and supporting the eccentric wheel housing, slowly remove the main shaft.

Installation: Follow the reverse order mentioned above.

operating process

Preparation of materials before operation:

Ingredients - Pre treatment of raw materials - Material mixing (adding wetting agents, adhesives) - Wet granulation - Particle drying - Whole granulation

1. Manual tablet pressing: Add a small amount of powder, install the feeding plate, remove the protective cover, and turn the handwheel to test the tablet pressing.

2. Electric tablet pressing: Install a protective cover, add medication powder, and perform electric tablet pressing after starting up. Continuous feeding can be added during tablet pressing.

Operation skills

Before using the tablet press, all oil cups, oil holes, and friction surfaces must be lubricated with oil, and the machine must be run empty to cover all friction surfaces with oil film, extending the service life of the machine.

Before each shift and after each shift adjustment, it is necessary to manually test a few tablets, and then turn on the electric tablet after there are no problems, which can extend the service life of the mold.

3. Storage of stamping dies: After cleaning, apply a layer of food grade lubricating oil (engine oil, edible oil can be used), put it in a special protective box or stamping die storage box and place it on a shelf, indicating the specifications and dimensions, and store it on the shelf.

Before pressing, the material should be screened for particles to avoid tablet looseness, fragmentation, and weight differences caused by the raw materials during pressing.

Selection of 5-piece type: Choosing the correct piece type is the key to the success of the compression die. For example, chewable tablets require high hardness and are easy to chew, so most use beveled flat tablets; For those that require film coating, a shallow concave shape can be chosen. Traditional Chinese medicine tablets require high pressure during compression due to the absence of adhesives and lubricants in their raw materials, and the tablet shape should be shallow and concave. Tablets with high sugar content are best designed with shallow concave or flat shapes. The middle mold can be made of alloy steel or hard alloy. Deep concave die molds are prone to damage and should be used sparingly.

When disassembling the upper punch, you can use pliers to press the mold tightly (to prevent damage caused by the pliers hitting the column, you can place a small piece of wood on top of the pliers), shake the handle with one hand, and hold the pliers with the other hand to successfully remove the upper punch.

When installing the upper die, if it directly contacts the middle die, the upper die may be operated. At this time, a piece of wood can be placed on the table and the handle can be shaken to complete the operation!

After daily use, the remaining powder particles should be taken out and wiped clean all parts of the machine. If the downtime is long, the die must be removed and the machine's friction surfaces must be adjusted. Clean the work surface, apply rust proof oil, and cover it with dust-proof clothing; The die should be wiped clean and then immersed in oil for storage.

Precautions for use

Before initial use, carefully read this manual by comparing it with the actual machine before use.

This machine can only operate in a certain direction (as indicated by the arrow on the handwheel or protective cover) and cannot be reversed to avoid damaging the components. Pay special attention and do not neglect when adjusting the tablet press.

3. Belt tension adjustment: Adjust through two adjustment nuts on the motor base plate. Pay attention to locking after adjustment.

When using a hand cranked tablet without power, the V-belt should be removed to reduce resistance and wear. But do not remove the large pulley as well, as it also serves as a flywheel to save effort.

When pressing the 5 electric tablets, the rotating handle on the handwheel must be turned down to avoid injury during operation.

Whether manually or electrically pressing, the upper punch rod should be in the raised position before starting. If the machine is started while the upward thrust is in a downward position, it will enter the middle mold plate immediately after starting. At this time, due to the machine's operation not yet rising and the inertia is small, it is easy to cause a top car accident. After the upper punch enters the middle mold, it is "stuck" due to the resistance of the pill, causing the machine to stop running. During the topping process, due to the high load, it often damages the parts or burns out the motor.

Treatment methods for the rear of 7 cars

(1) When there is a situation of top loading during electric tablet pressing, the power should be immediately turned off to avoid burning the motor.

(2) When the top of the car situation is relatively light, you can rotate the handwheel by hand to make the upward punch pass through the "dead point" (but it cannot be reversed to avoid the feeder repeating the feeding and causing more serious top of the car).

(3) If the hand wheel cannot be turned after the top of the car, insert the lever (an accessory of this machine) into the hole on the cone surface of the large pulley and turn it by hand to pass through the dead point (note: the rotation direction of the large pulley should be opposite to that of the hand wheel).

(4) The wrench is only allowed to be used by one person. If the situation of the top car is serious and one person cannot move it, the handling method in Article (5) must be followed. It is not allowed for two people to use the wrench, nor can iron pipes be added to the wrench or long iron rods be used instead of the wrench. To prevent excessive force from damaging the machine.

(5) When driving severely, loosen the connecting rod lock nut, turn the upper punch rod to raise it to reduce pressure, and then turn the handwheel to push the pill out. Then readjust the hardness of the pills.

During the tablet pressing process, it is necessary to regularly check the quality of the tablets (tablet weight, hardness, surface smoothness, etc.) and adjust them in a timely manner.

The granulation process of ingredients before compression has a significant impact on compression. The formulation of auxiliary materials such as medicine, lubricant, filler, and binder, as well as the situation of particle production (such as the condition of the powder, the tightness of the particles, the proportion of powder particles, water content, etc.), all directly affect the quality of the tablets. And often due to improper granulation of ingredients, it cannot be formed into tablets, and even damages the machine. Therefore, this machine cannot be used for semi fixed, damp, or pellet free or fine powder pressing. If it is found during use that the pressure has been adjusted to a considerable level but still cannot be pressed into pieces, or if there are phenomena such as excessive looseness, starting, fragmentation, pitting, and powder falling even after being pressed into pieces, the reasons should be identified from the aspects of ingredients and solved. Do not blindly adjust and increase pressure, which may damage the machine. In addition, some medicinal materials may not produce tablets with high hardness, but they have a certain degree of toughness, and their impact and shock resistance are not poor (usually ranging from 1-1 It only needs to be dropped from a height of 2 meters on the ground without breaking, so the degree should be based on meeting the requirements of transportation and storage. Do not focus solely on hardness to avoid excessive compression pressure and damage to the machine.