СATALOGUE / PHARMACEUTICAL PRODUCTION TECHNOLOGIES / BASICS OF PRESSING POWDER INTO TABLETS / Pressing stages for powdered materials

Pressing stages for powdered materials

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СATALOGUE / PHARMACEUTICAL PRODUCTION TECHNOLOGIES / BASICS OF PRESSING POWDER INTO TABLETS / Pressing stages for powdered materials

Pressing stages for powdered materials

The whole pressing process is proposed to be divided into three stages: compaction (underpressing); formation of a compact body; volumetric compression of the formed compact body. At the first stage of pressing under the influence of an external force there is convergence and compaction of material particles due to their displacement relative to each other and filling of voids. The forces overcome in this process are insignificant and compaction becomes noticeable already at low pressures. The applied energy is mainly used to overcome internal (between the particles) and external (between the particles and the matrix machines) friction.

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Information updated: 08 / 11 / 2026
Available for
Production: 1 year на оборудование для прессования порошкообразных материалов

Model: Pressing powdered materials

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In reality, there are no sharp boundaries between the three stages of pressing, as the processes occurring in the second stage take place in the first and third stages, and we can only speak about the predominant role of individual processes in each of the pressing stages. Studies have established that the nature of compaction of granules and powder particles during pressing depends on their strength. As mentioned in Sect. 4.4, tablets are produced by three methods: wet granulation, dry granulation and direct pressing.

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Technical specifications

In the second stage of pressing, as the pressing pressure increases, the material is intensively compacted by filling the voids and various types of deformation, which contribute to a more compact packing of the material. The resulting deformations can be of the following types: deformation due to elasticity helps the particles to wedge into each other, which increases the contact surface; deformation due to plastic properties makes the particles change their shape and fit more tightly together; deformation determined by the brittleness of the material, characterized by the destruction of the pressed material, occurs only when the stresses occurring in the pressed material exceed the yield strength of the material.

Additional information

In this case there is a mechanical destruction of material particles into smaller ones, accompanied by a significant increase in surface energy, which creates conditions for the emergence of contacts between particles. At the second stage of pressing a compact porous body with sufficient mechanical strength is formed from the bulk material. At the third stage of pressing at high pressure values, when the mechanical strength of tablets changes insignificantly, there is possibly a volumetric compression of powder particles and granules without a noticeable increase in contact surfaces.

Order status tracking

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Samuel
We have sent to info@minipress.ru photos of the damaged box with induction welding membrane machine FG-08. Please call back. 15/11/2026 02:01

Roman Tsibulsky
Good day, Samuel! Damage to the packaging is unfortunately a common practice in transportation. Please carefully unpack the shipment and send us a series of photos. We will take a look and take action. 15/11/2026 02:01

Evelyn
Automatic blister packaging machine for PVC+cardboard LW-35 with delivery to Tempe. We want to track the delivery status. 15/11/2026 02:11

Roman Tsibulsky
Evelyn, hello. The shipment has already arrived. Now it is in the warehouse of the transportation company. Your manager will contact you to clarify the time of delivery to your city. 15/11/2026 02:13

Hannah
I'm waiting to get my XL-12 plastic bottle filling and capping machine to Salzburg, then I want to buy an automatic capsule machine model GN-28 15/11/2026 02:21

Roman Tsibulsky
Good afternoon, Hannah! On the first question - the shipment will arrive in Salzburg after lunch. On the second question - the model GN-28 will be processed under a new contract ? Contact the office. 15/11/2026 02:25

Stella
In Toledo ITA-01 tablet and capsule counter, RZ-9 rotary tablet press and manual capsule filling machine. Help when we get it ? 15/11/2026 02:31

Roman Tsibulsky
Good afternoon, Stella! We have received from the factories photos of the equipment after packing. Natalia will forward the photos to you. Delivery time to you is 45-50 days. 15/11/2026 02:33

Grace
Waiting for delivery to St. Gallen of a TR-02 hard gelatin capsule polishing machine. What about it? 15/11/2026 02:41

Roman Tsibulsky
Hello Grace, on your order we inform you that the day after tomorrow the driver will contact you to clarify the time and place of unloading. 15/11/2026 02:45

Sebastian
Horizontal granulator for organic fertilizers JU-80, the price is up to date ? Delivery time to Reykjavik? Urgent. 15/11/2026 02:51

Roman Tsibulsky
Sebastian, Please read carefully the description of this model in our catalog. Prices are current. Timing 1-1.5 months. 15/11/2026 02:52

Emily
HX-9 plastic tube filling and sealing machine bought a month ago, arrival status in Valencia. 15/11/2026 03:01

Roman Tsibulsky
Hello Emily, Delivery status checked, in the interval from 14:00-16:00 is arriving at Valencia . The driver will call you beforehand. 15/11/2026 03:04

Jack
Dear Roman, how are you doing? Our company bought more than a year ago a filling and capping machine for penicillin vials, model XL-10. We got financing this year and want the same machine. Will you give us a discount? 15/11/2026 03:11

Roman Tsibulsky
Jack, thank you. We're doing great. Of course we will give a discount to the regular customer. Delivery of equipment also in Stockton ? Contact Natalia, she will send the contract and invoice. 15/11/2026 03:12

Evelyn
To what address to send you samples of bottles and caps to send them to the factory ? Regards Evelyn. 15/11/2026 03:21

Roman Tsibulsky
Good day, Evelyn We received the same question on WhatsApp and replied there as well. Kindly provide the shipment number for tracking purposes. Thank you. 15/11/2026 03:23

Sofia
Today we were promised delivery of a blister machine for MN-14 tablets and capsules, remember us ? No one's called us back. 15/11/2026 03:31

Roman Tsibulsky
Hello Sofia, Our manager Natalya in the morning will dial the driver, also we ask you yourself to the transportation company. 15/11/2026 03:33