FRITSCH Planetary Ball Mills high-performance all-rounder in routine laboratory work
The Planetary Micro Mill PULVERISETTE 7 premium line with 2 grinding stations is designed for a broad range of applications and ideally suited for loss-free grinding down to a final fineness of 100 nm of hard, medium-hard and brittle materials. Depending on the desired final fineness, the grinding can be performed dry, in suspension or in inert gas.
In addition to comminution, you can also use Planetary Mills for mixing and homogenising emulsions and pastes or for mechanical activation and alloying in materials research.
PULVERISETTE 7 premium line Planetary Micro Mill เครื่องบดตัวอย่างระดับนาโน
เป็นเครื่องบดและลดขนาดอนุภาคของตัวอย่างโดยใช้หลักการบดแบบกระแทก ( Impact Force ) โดยส่วนภาชนะใส่ตัวอย่าง ( Bowl ) และฐานหมุน เคลื่อนที่ในทิศทางตรงกันข้าม เพื่อเพิ่มแรงกระแทก ทำให้ประสิทธิภาพการบด , ระยะเวลาที่ใช้สั้นลง เทคนิคในการบดของเครื่องเหมาะกับตัวอย่างที่มีความแข็งแต่เปราะ
AT A GLANCE
- Extra strong centrifugal acceleration with up to 95 g and up to 1100 rpm
- Useful capacity of up to 2 x 30 ml
- Extremely fast bowl changing due to SelfLOCK clamping
- Highest process reliability and precise reproducibility
- GEOLOGY AND MINERALOGY
- MECHANICAL ALLOYING
- MATERIALS RESEARCH
|Working principle||impact force|
|Optimal for material type||hard, medium-hard, brittle|
|Number of grinding stations||2|
|Grinding tools||grinding bowls and grinding balls|
|Materials of the grinding tools||agate, sintered corundum, silicon nitride, zirconium oxide, hardened stainless steel, hardmetal tungsten carbide|
|Grinding bowl sizes||20, 45, 80 ml|
|Grinding ball diameter||0.1 – 20 mm|
|Max. feed size (depends on material)||5 mm|
|Min. sample quantity||1 ml|
|Max. sample quantity||60 ml|
|Final fineness (depending on material)||< 0.1 µm|
|Typical grinding time down to analytical fineness||3 min|
|Grinding in inert gas||yes|
|Gas pressure and temperature measurement||yes|
|Max. rotational speed grinding bowls||2200 rpm|
|Rotational speed of main disk||100-1100 rpm|
|Transmission ratio planetary disk / grinding bowl||i relative = 1 : -2|
|Effective diameter of main disk||140 mm|
|Centrifugal acceleration (g = 9.81 m/s²)||95 g|
|Electrical details||100-120 V / 200-240 V/1~, 50-60 Hz, 1200 Watt
voltage, indicated by customer is set
|Emission sound pressure level at the workplace according to DIN EN ISO 3746 (depending on the material to be ground, grinding bowls/balls, selected rotational speed)||LpAd = 80 dB|
|Dimensions (W x D x H)||bench top instrument 40 x 58 x 36 cm|
In the operating manual, under DOWNLOADS, you find the appropriate rotor speed limits for grinding ball-diameters and grinding bowls made of agate.
Comminution according to the Planetary-Principle
The comminution takes place primarily through the high-energy impact of grinding balls and partially through friction between grinding balls and the grinding bowl wall. To achieve this, the grinding bowl, containing the material to be ground and grinding balls, rotates around its own axis on a main disk rotating in the opposite direction. At a certain speed, the centrifugal force causes the ground sample material and grinding balls to bounce off the inner wall of the grinding bowl, cross the bowl diagonally at an extremely high speed and impact the material to be ground on the opposite wall of the bowl.
Due to sunken grinding bowls, the high-performance Planetary Micro Mill PULVERISETTE 7 premium line reaches unprecedented relative rotational speeds of the grinding of up to 2,200 rpm and centrifugal accelerations of 95 times the force of gravity. Thereby is the application of energy approximately 150 % above that of conventional Planetary Mills. For ultra-fine grinding results down into the nano range in shorter times.
Your advantage: the shortest grinding times down to any desired fineness, even into the nano range.
- Rotational speed of main disk 100 – 1100 rpm, relative rotational speed of grinding bowls up to 2200 rpm
- Absolutely safe operation – due to the revolutionary SelfLOCK, grinding bowls snap into place in the machine – without any additional clamping
- Blocking of the mill in the event of impermissible operating states
- Automatic shutoff function if an imbalance occurs
- Prevention of impermissible grinding settings due to automatic detection of inserted grinding bowls and optimisation of rotation speed via RFID-Chip
- Automatic parameter check before each grinding guarantees exact reproducibility
- Added time savings and reliability due to fast bowl changes
- Simultaneous comminution of up to 2 samples
- Useful capacity of up to 2 x 30 ml
- Ergonomically designed touchscreen features a particularly logical menu structure in 10 languages for easy, intuitive user navigation
- Extensive accessories for simplifying your daily work
Fast, simple and safe operation
The sunken bowls with SelfLOCK Technology form a single unit with the lid – no additional tensioning, no incorrect operation! The bowls are simply placed in the mill, where they position themselves and snap securely into place. The grinding chamber of the premium line opens and closes automatically and independently rotates the bowl mountings into a convenient position for handling. Removal and opening of the bowls are also performed with just two motions. For easy cleaning even the milling chamber cover can be completely removed.
Automatic control and monitoring – Measurement of gas pressure and temperature
The software MillControl enables the automatic control of the Planetary Micro Mill PULVERISETTE 7 premium line and validation of the grinding process. The actual rotational speed and power consumption are checked and documented. By using two EASY GTM-bowls with special lid and transmitter you transform your PULVERISETTE 7 premium line into an analytical measuring system for monitoring pressure and temperature during the grinding process.
Configure your Planetary Micro Mill PULVERISETTE 7 premium line exactly to your specific application
The Planetary Micro Mill PULVERISETTE 7 premium line operates with two grinding bowls in the sizes 20 ml, 45 ml or 80 ml, which turn with a transmission ratio of 1 : –2 relative to the main disk. To achieve the best grinding results and for direct prevention of contamination of the samples due to undesired abrasion, all grinding bowls and balls are available in 6 different materials. For grinding in inert gas and for mechanical activation and alloying premium line gassing lids are recommended – quickly and safely. For grinding in suspension, we offer an Emptying Device for a quick and easy separation of the grinding balls and suspension.