Operating instructions MINI-MILL PULVERISETTE 23 Valid starting with: 23.
Fritsch GmbH Milling and Sizing Industriestraße 8 D - 55743 Idar-Oberstein Telephone: +49 (0)6784/ 70-0 Fax: +49 (0)6784/ 70-11 email: info@fritsch.de Internet: www.fritsch.
Certifications and CE conformity Certifications and CE conformity Certification Fritsch GmbH has been certified by the TÜV-Zertifizierungsgemeinschaft e.V. An audit certified that Fritsch GmbH conforms to the requirements of the DIN EN ISO 9001:2008. CE Conformity The enclosed Conformity Declaration lists the guidelines the FRITSCH instrument conforms to, to be able to bear the CE mark.
Table of contents Table of contents 1 Basic structure............................................................................... 6 2 Safety information and use........................................................... 7 2.1 Requirements for the user..................................................... 7 2.2 Scope of application............................................................... 7 2.2.1 Operating principle............................................................. 8 2.
Table of contents 6.2 Filling the grinding bowl....................................................... 6.3 Factors with an impact on grinding..................................... 6.3.1 Running time (grinding duration)..................................... 6.3.2 Vibration frequency.......................................................... 6.3.3 Number and size of the balls............................................ 6.3.4 Weight of the balls (type of material)............................... 6.4 Dry grinding.
Basic structure 1 1 2 3 Basic structure Knurled screw Knurled nut Clamping bracket 4 5 6 -6- Grinding bowl Control panel Rubber disk
Safety information and use 2 Safety information and use 2.1 Requirements for the user This operating manual is intended for persons assigned with operating and monitoring the Fritsch PULVERISETTE 23. The operating manual and especially its safety instructions are to be observed by all persons working on or with this device. In addition, the applicable rules and regulations for accident prevention at the installation site are to be observed.
Safety information and use 2.2.1 Operating principle The rapid vertical acceleration of the grinding bowl causes the grinding balls in the bowl to vibrate. Comminution occurs when the balls of grinding stock hit the walls of the bowl and each other. Due to the almost spherical grinding chamber the balls are not limited to vertical movement, and very efficient comminution is achieved. 2.3 Obligations of the operator Before using the PULVERISETTE 23, this manual is to be carefully read and understood.
Safety information and use 2.4 Information on hazards and symbols used in this manual Safety information Safety information in this manual is designated by symbols. Safety information is introduced by keywords that express the extent of the hazard. DANGER! This symbol and keyword combination points out a directly hazardous situation that can result in death or serious injury if not avoided.
Safety information and use DANGER! This symbol and keyword combination designates contents and instructions for proper use of the machine in explosive areas or with explosive substances. Ignoring information with this designation will result in serious or fatal injury. DANGER! This symbol and keyword combination designates contents and instructions for proper use of the machine with combustible substances. Ignoring information with this designation will result in serious or fatal injury.
Safety information and use Tips and recommendations This symbol emphasises useful tips and recommendations as wells as information for efficient operation without mal‐ function. Further designations To emphasise procedure instructions, results, lists, references and other elements, the following designations are used in this manual: Designation Explanation Step-by-step procedure instructions 1., 2., 3. ...
Safety information and use DANGER! Explosion hazard! – When grinding oxidizable substances, e.g. metals or coal, there is a risk of spontaneous combustion (dust explosion) if the share of fine particles exceeds a certain percentage. When grinding these kinds of substances, special safety measures must be taken and the work must be supervised from a specialist. – The high-speed rotor mill is not explosion protected and is not designed to grind explosive materials. n Do not remove the information signs.
Safety information and use 2.7.2 Protection against restart The device is safeguarded against restarting after a power failure. 2.7.3 Overload protection The device has internal excess current protection and switches off in the event of overload.
Technical data 3 Technical data 3.1 Dimensions 280 x 150 x 270 mm (height x width x depth) 3.2 Weight approx. 7.35 kg (net) approx. 9 kg (gross) 3.3 Operating noise Emissions value of workplace according to DIN EN ISO 3746:2005 LPa = 64.4 dB(A). The noise level measurement was conducted with sand as grinding stock and grinding elements made of zirconium oxide. 3.4 Voltage The device is operated with an external 24 V switch-mode power supply.
Technical data 3.8 Material n Maximum feeding size 6 mm n Maximum feeding amount 5 ml 3.9 Final fineness d50 = 5 µm for wet grinding depending on the sample materials for comminution.
Installation 4 Installation 4.1 Transport The device is delivered in a cardboard box. The guarantee excludes all claims for damage due to improper transport. 4.2 Unpacking NOTICE! Do not take the PULVERISETTE 23 out of the packaging by the grinding bowl holder! n Compare the contents of the delivery with your order. n Please store the transport packaging so that it can be reused if you need to return the product.
Installation 4.5 Electrical connection Before establishing the connection, compare the voltage and current values stated on the type plate of the power supply with the values of the mains system to be used. CAUTION! Ignoring the values on the type plate may result in damage to the electrical and mechanical components. 4.6 Changing the timer By holding down the STOP button (for 5 seconds) you can access the setup mode where the time fields hours/minutes or minutes/seconds can be set.
Initial start-up 5 Initial start-up Perform initial start-up only after all work as described in Ä Chapter 4 ‘Installation’ on page 16 has been carried out. 5.1 Switching on NOTICE! Before switching the device on make sure that a grinding bowl or the transport wood is clamped into the grinding bowl holder. The loose grinding bowl holder can damage the housing. n Connect the external power supply to the mains and the low voltage plug to the bottom right of the device.
Using the planetary mill 6 Using the planetary mill 6.1 Choice of grinding bowls and grinding balls CAUTION! If the grinding elements used are not genuine accessories, we assume no guarantee and exclude all liability for damage to the device or for personal injury. To prevent excessive wear caused by abrasion, the hardness and density (specific weight) of the grinding bowl and grinding balls used must be greater than that of the material used.
Using the planetary mill These are reference values: The size of bowls and grinding balls may need to be determined through experimentation. NOTICE! It is not advisable to mix balls of different diameters. (If balls with different diameters are used, increased wear to the balls is to be expected.) Fill the grinding bowl with as few balls as possible as the abrasion, wear and stress on the device and the grinding bowl increases significantly when filled with more balls.
Using the planetary mill Ball diameter in mm 5 10 15 Stainless steel 7,8 0,51 4,08 13,78 Tempered steel 7,9 0,52 4,14 13,96 To determine the weight of the required balls, the "calculated weight of a ball" is multiplied by the "number" of balls required. Example: A 10 ml zirconium oxide bowl is to be filled with 30 zirconium oxide balls with a diameter of 5 mm. Calculation: 0.37 g * 30 St = 11.1 g 11.
Using the planetary mill Stainless steel and tempered steel: a b c x Grinding bowl lid Grinding bowl O-ring A burr can form in this position! n The bowl sealing surfaces must be clean. n A burr can form on the inner edge of the stainless grinding bowl and lid after a lengthy grinding time. This burr has to be removed at an early stage with a scraper or fine emery paper (see also Ä Chapter 8 ‘Maintenance’ on page 27). n Check the O-ring (c) of the lid seal for damage and proper insertion.
Using the planetary mill 6.3.2 Vibration frequency Higher vibration frequencies shorten the grinding time and increase the share of fine particles. 6.3.3 Number and size of the balls Pre-grind course, hard material with large balls: Reduced percentage of fine material! Many small balls increase the percentage of fine material during extended running time. 6.3.4 Weight of the balls (type of material) A higher mass (specific weight) of the grinding balls accelerates grinding. (see table in Ä Chapter 6.
Using the planetary mill 6.5 Wet grinding (grinding in a suspension) CAUTION! Burn hazard! The grinding bowl can become hot during long grinding periods. Allow for cooling time after grinding. Wear safety gloves! A longer grinding time can be selected for wet grinding in suspension but beware of excessively high temperatures. High vapour pressure can develop in the grinding bowl; this escapes with sudden force when the clamping device is released. 6.
Using the planetary mill 6.8 Control panel 6.8.1 Setting the vibration frequency The vibration frequency can be set as 15-50 Hz (strokes per second) in 1 Hz steps using the +/- buttons (oscillation). The mill generates natural oscillation of higher or lower intensity depending on the stroke frequency. The set oscillation frequency is controlled by the microprocessor and thus guarantees reproducible grinding. 6.8.2 Setting the running time The running time is set using the +/- buttons (timer).
Cleaning 7 Cleaning DANGER! Mains voltage! – Before beginning with cleaning work, disconnect the mains plug and protect the device against being unintentionally switched back on! – Do not allow any liquids to flow into the device. – Indicate cleaning work with warning signs. – Put safety equipment back into operation after cleaning work. NOTICE! Cool grinding elements made of zirconium oxide slowly and carefully.
Maintenance 8 Maintenance DANGER! Mains voltage – Before beginning with maintenance work, unplug the mains plug and protect the device against being unintentionally switched back on again! – Indicate maintenance work with warning signs. – Maintenance work may only be performed by specialised personnel. – Put safety equipment back into operation after maintenance or repair work. We recommend keeping a safety logbook Ä Chapter 13 ‘Safety logbook’ on page 35, where all work (maintenance, repairs......
Maintenance Functional part Task Test Maintenance interval Grinding bowl holder Rubber disk (6) Signs of use Every 100 h Clamping bracket (3) Realign or replace if bent O-ring seal for the grinding bowl If deformed, frayed or torn - 28 -
Repairs 9 Repairs DANGER! Mains voltage! – Before beginning with repair work, unplug the mains plug and protect the device against being unintentionally switched back on. – Indicate repair work with warning signs. – Repair work may only be performed by specialised personnel. – Put safety equipment back into operation after maintenance work. 9.1 Checklist for troubleshooting Fault description Cause Remedy No display No mains connection, main switch "Off". Plug in mains plug. Switch on main switch.
Disposal 10 Disposal It is hereby confirmed that FRITSCH has implemented the directive 2002/95/EC of the European Parliament and Council from 27th January 2003 for the limitation of the use of certain dangerous substances in electrical and electronic devices.
Guarantee terms 11 Guarantee terms Guarantee period As manufacturer, FRITSCH GmbH provides – above and beyond any guarantee claims against the seller – a guaranty valid for the duration of two years from the date of issue of the guarantee certificate supplied with the device. Within this guarantee period, we shall remedy all deficiencies due to material or manufacturing defects free of charge. Rectification may take the form of either repair or replacement of the device, at our sole discretion.
Guarantee terms Costs not covered by the guarantee This guarantee excludes any costs for transport, packaging or travel that accrue in the event the product must be sent to us or in the event that one of our specialist technicians is required to come to your site. Any servicing done by persons not authorised by us and any use of parts that are not original FRITSCH accessories and spare parts will void the guarantee.
Exclusion of liability 12 Exclusion of liability Before using the product, be sure to have read and understood this operating manual. The use of the product requires technical knowledge; only commercial use is permitted. The product may be used exclusively within the scope of applications set down in this operating manual and within the framework of guidelines put forth in this operating manual and must be subject to regular maintenance.
Exclusion of liability Fritsch GmbH excludes any liability, warranty, or other obligation to compensate for damages, regardless of whether this liability, warranty, or other obligation is explicit or implicit, contractual or arising from unlawful acts or prescribed contractually, by law, or otherwise.
Safety logbook 13 Date Safety logbook Maintenance / Repair Name - 35 - Signature
Safety logbook Date Maintenance / Repair Name - 36 - Signature
Safety logbook Date Maintenance / Repair Name - 37 - Signature
Index 14 Index A M Accident prevention . . . . . . . . . . . . . . . . . . . . . . . . 7 Ambient conditions . . . . . . . . . . . . . . . . . . . . . . . 16 Authorised persons . . . . . . . . . . . . . . . . . . . . . . . . 7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 B Number of balls in the grinding bowl . . . . . . . . . . . 20 N Basic structure . . . . . . . . . . . . . . . . . . . . . . . . .
© 2014 Fritsch GmbH Milling and Sizing Industriestraße 8 D - 55743 Idar-Oberstein Telephone: +49 (0)6784/ 70-0 Fax: +49 (0)6784/ 70-11 email: info@fritsch.de Internet: www.fritsch.
