STANDARD OPERATING PROCEDURE Mill, Disc, with Stone Plate Model: LV15K Manufacturer: Glen Mills Incorporated Location: Dry Processing Pilot Plant, 1851 Food Sciences Building Publication Date: 07/23/14 Iowa State University does not discriminate on the basis of race, color, age, ethnicity, religion, national origin, pregnancy, sexual orientation, gender identity, genetic information, sex, marital status, disability, or status as a U.S. veteran. Inquiries regarding non-discrimination policies may be directed to Office of Equal Opportunity, 3350 Beardshear Hall, 515 Morrill Road, Ames, Iowa 50011, Tel. 515 294-7612, email eooffice@iastate.edu.
Description and Uses Glen Mills Toothed-Disc Mill, Model LV15K, is a typical mill used for grinding various grains. It is simple to operate and easy to clean. The mill is a disc-type grinder with an adjustable grinding particle size. The mill is equipped with 8 different tooth-shaped, stainless steel grinding discs that are interchangeable depending upon the application. The degree of fineness depends on the clearance between the grinding discs. The mill has a starter with a safety switch and comes with a nylon collection bag. Power Specifications Motor: Siemens 3 Mot 1LA5090-4AA90 (3-Phase) Power: 1.1 kw Voltage :220V/440V Speed/Frequency: 3,000 rpm @ 60 Hz. Potential Hazards and Safety Precautions Electric Shock/High Voltage (220V/440V) Make certain to use the correct outlet that is specifically designed to fit the electrical cord plug. Make sure the area around the outlet, floor and your hands are completely dry when plugging or unplugging the electrical cord to/from the outlet. Sharp, Rotating Grinding Plates/Abrasions, Cuts, or Severed Body Parts Do not insert hands, fingers or other body parts into the hopper or the product discharge shoot while the mill is in operation. The teeth are sharp and abrasive! Use extra caution by unplugging the mill when cleaning its interior or changing/adjusting the toothed grinding discs. Mechanical Pinch Points/Possible Entanglement of Extremities, Hair, Jewelry or Clothing Do not use any tool to assist product flow through the hopper or discharge shoot, as serious injury may result. Make sure to secure long hair and any loose clothing or jewelry before operating the mill. Nothing, except the material for which the mill is intended to grind, should ever be placed into the hopper while the mill is running. Flying Debris/Potential Eye Damage Do not operate the mill without wearing all required personal protective equipment, including safety goggles. 2
Required Personal Protective Equipment Lab Coat Dust Mask Safety Goggles Hair Net (Tie Back Long Hair) Ear Protection No Open-toed or Open-heeled Shoes Long Pants and Sleeves No Loose Fitting Clothing Training Required Training (*denotes courses offered online) Fire Safety & Extinguisher Training* Laboratory Safety: Core Concepts* Machine & Site Specific Training Recommended Training for Frequent Users (*denotes courses offered online) Electrical Safety & Lockout/Tagout Safeguarding Mechanical Hazards Shop Safety Fundamentals: Basic Procedures & Policies* Operation 1. Be sure to wear all required personal protective equipment as listed. 2. Be sure to familiarize yourself with the Operating Instructions Manual available for this machine before operating the mill. The manual is located in the pilot plant office, 1955 Food Sciences Building. 3. Check with the pilot plant manager to determine whether or not you have the correct grinding disc installed for your application and desired product results. If not, the grinding discs must be carefully changed under the direction of the pilot plant manager. Note: Be sure to safely unplug the mill before changing the disc. 4. Once you have ascertained that the correct grinding disc is installed as per your application, safely plug the electric power cord into the correct outlet specifically designed to fit the plug. Note: Make sure the area around the outlet, floor and your hands are completely dry when plugging or unplugging the electrical cord to/from the outlet. 3
5. Before starting the mill, make sure that the mill is positioned properly on a level surface and in an unconfined space. Note: When properly positioned, the user should be able to move freely around the mounting cart with ease and with no obstructions. 6. To switch on the power supply, turn the RED Power knob clockwise to the ON position (see Figure 1). 7. To adjust the particle size of the final product, first turn the Lock Control knob to the left to unlock. Adjust the particle size by turning the Particle Size Control knob. Turn the control knob to the right to create courser products; left to create finer products (see Figure 2). 8. After adjusting the Particle Size Control knob to the desired gap setting, turn the Lock Control knob to the right to lock the particle size gap setting in place (see Figure 2). 9. Place an empty container beneath the discharge shoot to collect the ground product. Note: The discharge shoot is located directly beneath the installed grinding discs. If available, you may use the nylon collection bag to retrieve your ground product. 10. Start the mill by pressing the ON ( I ) button (refer to Figure 1). 11. Begin feeding materials into the hopper (refer to Figure 2). Note: Adjust your feed rate low enough so as to not jam up the mill. Do not use any tool to assist product flow through the hopper or discharge shoot, as serious injury may result. 12. Continue to slowly feed materials into the hopper until the material to be ground is exhausted. Note: Be sure to report any operational difficulties directly to the pilot plant manager. 13. When operation is completed, turn off the mill by pressing the OFF ( O ) button (refer to Figure 1). 14. Turn off the power supply by turning the RED Power knob counterclockwise to the OFF position. 15. Safely unplug the electrical power cord from the outlet. Note: Make sure the area around the outlet, floor and your hands are completely dry when plugging or unplugging the electrical cord to/from the outlet. 16. Initiate clean-up procedures. ON/OFF Button Hopper Power Knob Figure 1 Particle Size Control: To the right course To the left fine Lock Control: To the right lock To the left unlock Figure 2 4
Clean-up Procedures Please note that these clean-up procedures are for non-transgenic grains only. Transgenic material has a separate, more thorough clean-up procedure, as all transgenic material must be accounted for. For more information, see special standard operating procedures (SOP) for the handling of transgenic material. 1. Be sure that the mill is unplugged before initiating any clean-up procedures. 2. Loosen the knobs that secure the cover plate in place and carefully remove the cover plate. 3. Remove all debris from the hopper, cover plate, grinding discs, all internal and external components of the mill, and mounting cart using a brush and a pressurized air hose. 4. Sweep up all debris from the floor and surrounding work area. Dispose of all debris in a nearby trash can. 5. Initiate check-out procedures by having the cleaned mill and surrounding work area inspected by the pilot plant manager. 6. Once approved, secure the cover plate back onto the mill. Machine Care and Maintenance The mill must be properly cleaned and inspected for broken parts after each use. Report any broken parts directly to the pilot plant manager. All final inspections are performed by the pilot plant manager. Motors and moving parts should be properly lubricated on a regular basis by the pilot plant manager or a trained service technician. Accessories The mill comes equipped with eight interchangeable, stainless-steel, toothed grinding discs with varying applications. The grinding discs are located in a RED toolbox located on the mill s mounting cart (see Figure 3). For safety reasons, please contact the pilot plant manager when changing the grinding discs for your desired application. Figure 3 5