Lean Manufacturing Case Study

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Q1. What is Lean Manufacturing? Answer: Toyota Production System (TPS) is a model of lean manufacturing. A lean manufacturing system replicates the design with minimal waste. It Involves improved relationships with parts suppliers through Keiretsu (groups of manufacturers, suppliers, and distributors) Goals: • To eliminate waste! (muda) • Waste is anything the customer is not willing to pay for (does not add value to the product) • To reduce the number of parts warehoused by a plant for immediate use • To reduce inventory costs through fewer parts kept on hand • To make products faster, better, and cheaper • To improve emphasis on quality Q2. Powder Coating process? Answer: A process that covers a surface with a powdered resin and then fuses…show more content…
MIG: uses arc and a consumable wire electrode of a compatible metal into the weld pool. TIG: uses arc and a non-consumable tungsten tip cooled by the inert gas shield Q22: Prepregs? Answer: Fiber reinforcements that are pre-saturated with resins are called prepregs. Aircraft, automotive, and military markets have relied on prepregs. Prepregs enable manufacturers to closely control resin-to-fiber ratios. Prepregs require less cleanup and waste (no over spray). Q23: ULTRASONIC WELDING? ULTRASONIC WELDING: Vibrations move parts at a minimum of 20,000 hertz, causing friction that melts metal and plastic parts. Ultrasonic can be used to spot weld, change adhesives to molten material, and melt films and fabrics together. Used for sealing and staking—melting thermoplastic studs to mechanically lock dissimilar materials in place. The process can also be used for slitting. Q24: Purpose of deflocculant? 1. Reduce amount of water in slip • If the slip is too wet the pores of the dry plaster molds will become saturated • Wet molds will have to be dried prior to reuse (time is lost). 2. Deflocculant is a chemical that makes slip fluid while keeping the water content low 3. Can reduce water content from as much as 60% to 25% or…show more content…
• Industrial parks, in most cases owned by Mexican or American corporations • Operating under the Mexican Secretariat of Commerce and Industrial Development (SECOFI) • First located on the U.S.-Mexican border; now expanded further into Mexico • Utilize excess labor in border • Encourage Mexican exports • Help develop Mexican industrial base Q27: Benefits of Annealing? • Used to reduce part breakage and relieve internal stresses • Plastic develops internal stresses when the external shape is changed • Some finishing processes and chemical treatments can create internal stress • Annealing also improves plastic’s workability • Annealing is done by prolonged heating at just above the molding temperature, then slowly cooling under controlled conditions Q28: Initiator? Initiator, a source of any chemical species that reacts with a monomer (single molecule that can form chemical bonds) to form an intermediate compound capable of linking successively with a large number of other monomers into a polymeric compound. The most widely used initiators produce free radicals (reactive atoms or groups of atoms that contain odd numbers of electrons); examples include peroxides and aliphatic azo compounds used to polymerize vinyl chloride, methyl methacrylate, and other

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