MoldMaking Technology

APR 2017

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moldmakingtechnology.com 41 CONTRIBUTOR Ryan Pohl is founder of Praeco Skills LLC. FOR MORE INFORMATION Praeco Skills LLC / 616-951-2133 ryan@praecoskills.com / praecoskills.com language that solid modeling is built upon, so if an apprentice does not have a full understanding of these concepts, his or her career advancement will be highly limited. Algebra. Every person working in moldmaking will encounter basic algebraic formulas at some point in his or her career. So, at the very least, every apprentice must have complete mastery of the order of operations (or PEMDAS, which stands for paren- theses, exponents, multiplication and division, and addition and subtraction) to be able to solve these formulas. Having the abil- ity to solve for unknown variables is important to productivity calculations, feeds and speeds and many other important shop- floor calculations. The results of these calculations can change dramatically if you process their respective formulas wrong. Trigonometry. Working with sine bars and sine plates is still a common practice in most moldmaking environments. No apprenticeship should be completed without having the ability to identify the different types of triangles (isosceles, equilateral, obtuse and right), as well as their respective components. Each apprentice should be able to use all sine, cosine and tangent func- tions and calculate gage block stacks. Every apprentice should also be able to use the Pythagorean theorem (the square of the side opposite the right angle is equal to the sum of the squares of the other two sides) to solve for unknown angles and sides. There is no doubt that there could be more topics added to this list and that this list could inspire a lively discussion about the necessary level of shop math in our industry. I have found myself on both sides of the argument, but have concluded that, at the very least, the topics mentioned here should be mastered, not just covered or reviewed, to help an apprentice in his or her career and provide a solid foundation for learning more com- plex topics in the future. LEARN MORE For more from Ryan Pohl on related technical instruction options, visit short.moldmakingtechnology.com/rti . Train hands - on. Whether you're an experienced mold polisher or new to the industry, Gesswein's mold polishing classes will help to hone your skills and improve the quality of work. 888.429.6336 www.gesswein.com/moldpolishingtechnology.aspx 2017 Dates 13 th -14 th 26 th -27 th July: 10 th -11 th October: 23 rd -24 th | | Precise "Rolling" Mold Alignment AGATHON Machine Tools, Inc 9 Parklawn Drive Bethel, CT 06801 Tel: 203-730-8741 mailamt@agathonusa.com New, Longer Round Fine Centering System • Permits pre-centering of mold halves • 50% longer centered travel on mold separation • Brass cage for better wear resistance • Rolling elements for high precision mold alignment www.agathon.com

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