Název SŠ: SŠ-COPt Uherský Brod Autor: Ing. Hana Kubišová, Ph.D. Název prezentace (DUMu): Non-Metalic Materials Název sady: Technical English for students of study branch Technician Gunsmith 2 nd, 3 rd and 4 th class Číslo projektu: CZ.1.07./1.5.00/ Datum vzniku: Uvedení autoři, není-li uvedeno jinak, jsou autory tohoto výukového materiálu a všech jeho částí. Tento projekt je spolufinancován ESF a státním rozpočtem ČR. 1

Záměrem této sady výukových materiálů s názvem Technical English je ukázat žákům, kteří se v této oblasti vzdělávají, jaký byl vývoj zbraní. Jednotlivé DUMy (prezentace) v této sadě popíší postupně tematické oblasti, které jsou probírány v předmětu Anglický jazyk na naší SŠ. Konkrétně tato prezentace je zaměřena na nekovové materiály. ANOTACE 2

REVISION 3

 How do we divide iron ?  How do we classify steels ?  What do you know about steel class 10?  What do you know about steel class 18?  How many grades of steel do you know?  What is the numeric steel grade ?  What does the additional digits express? 4

 What kind of cast iron have we got?  What is the first number of iron?  Which other materials are used in production of weapon? 5

NON-METALLIC MATERIALS 6

 Metallic materials are substituted for plastic.  Polymeric materials have got better properties than metallic materials.  Metallic materials have got a higher density and lower resistance to corrosion and other chemical effects.  Polymeric materials, wood, ceramics, stoneware, porcelain, leather, textiles, glass and paper present the groups of the most important non-metallic materials. 7

 Polymeric materials are the youngest group of construction materials.  The production of polymeric materials started around  Polymeric materials are new construction materials with specific properties.  Polymeric materials are brittle, rust, isolated and easily machined. 8

 Polymeric materials are organic macromolecular compounds.  Polymeric materials are produced synthetically.  The basic raw materials are mainly oil and coal and other substances.  Properties of polymeric materials can be modified by additives. 9

 Admixture of polymeric materials are :  fillers,  softeners,  pigments,  stabilizers,  lubricants,  blowing 10

THERMOPLASTICS 11

 Thermoplastics are divided into:  PVC is widely used at temperatures of 60ºC, resistant to acids and alkalis,  PE is resistant to acids, alkalis and solvents at temperatures of 75ºC, it is lighter than water,  PP is used in temperatures up to 90ºC,  PS is hard, brittle, transparent, well dye, at temperatures of 75ºC. Excellent insulator, well dissolves and stick, easy to process. 12

 Styrene-impact polystyrene, is resistant to impact, as vulcanizable is used to production tires, shoe soles, gaskets etc..  ABS is a tough, highly resilient to temperature 85ºC.  Cellulose-acetate is a solid, tough, transparent, dye, slightly moistened. 13

 PTFE (Teflon) is a less strong and a very tough polymer. PTFE is resistant from -250ºC to +250ºC. It is completely resistant to all chemicals; PTFE has got high lubricity and is an excellent insulator.  PA is resistant to wear, absorbs shock and vibration applications at temperatures 80ºC. Is violated acids. 14

 POM is hard, very tough, at temperatures 90 ºC. It distorts acid.  PC is tough, extremely tough, unbreakable transparent material, resistant to 120ºC.  PMMA is an organic glass. PMMA is shatterproof, resistant to weather conditions, temperatures at 75ºC. 15

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THERMOSET AND ELASTOMERS 17

 Fenolformaldehyd is hard, brittle, resistant to solvents and temperatures up to 120ºC.  Epoxy-solid is resistant to weather and temperature at 120ºC.  Polyesters are binder for glass fibers, up to temperature 120ºC.  Polyurethane is rigid to rubbery material with a high abrasion resistance and a damping capacity. 18

 Silicones are organic compounds of silicon and oxygen, resistant to aging, weathering, water- repellent and resistant to temperatures up to 200ºC.  Silicone rubber is elastic from -60ºC to +220ºC. . 19

OTHER MATERIALS 20

 Other technical non-metallic materials:  wood,  glass,  technical porcelains,  technical ceramics,  leathers,  textites,  papers. 21

 Treatment of metals :  annealing,  hardening,  tempering,  special thermal treatment processes,  heat treatment. 22

QUIZ 23

 Why do we use plastics?  When did the production of polymeric material start?  How can you produce plastics?  What is it added to plastics?  What do you know about termoplastics? 24

 What do you know termosets and elastomers ?  What do you know other technical non-metallic materials ?  How further processed metals?  Which way is the best treatment? 25

SUMMARY 26

 Polymeric materials are used for production of guns.  Ceramics, glass or wood are also used.  Polymeric materials have got very unique properties.  Extrusion, injetion are used as technology of production of parts guns.  Termoplasts are PP, PE, PTFE. Rubber is a termosets. 27

REFERENCE-TEXT 28

29  KŘÍBEK, J. Střelné zbraně I. část, 2. vyd. Brno: PC-DIR spol. s.r.o.,  ELMAN, J. a Michalíček, V. Česko-Anglický technický slovník, 1. vyd. Praha: Sobotáles, 2002.

REFERENCE-OBRÁZKY 30

 Snímek č. 12 [cit ] Dostupný pod licencí Public Domain na ne.png ne.png 31