Anglicky v odborných předmětech "Support of teaching technical subjects in English “

1. Anglicky v odborných předmětech"Support ofteachingtechnicalsubjects in English“ Tutorial: Engineering Technology Topic: Plastic IV. - Processing methods Prepared by: Ing. VladislavZelinka Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

2. EngineeringTECHNOLOGYPlastic Processing methods

3. Briefly: Plastic processing has some characteristics of pouring technology but also of metal forming. There are these methods of plastic forming: • Extrusion + blowing • Jetting (into the forms) • Presswork • Foaming.

4. 1.) Extrusion /blowing: Take out Pipe extrusion Blowing and setting Compressed air Product Plastic pipe Profile nozzle Blowing hose Split mould (cooled) Extrusion and blowing of hollow products

5. Plasticizing cylinder Granulate Jetting cylinder 2.) Jetting (into moulds): During the jetting we use the knowledge from forming as well as from pouring. Opening and closing device of mold Gear Measurement unit hydraulics Divided mold Operator and steering gear Cut through injection molding machine (plastic is injected into the closed mold) Cylinder of injection Steering worm drive Plastic granulate Divided mold Plasticizing and injecting unit Opening and closing unit Densifying steering worm injector Closing cylinder heating plasticizing cylinder opening cylinder Backflowvalve product Injection molding machine

6. 3.) Presswork: Upper part of the mold Thermoset powder slide Lower part of the mold Filler heating Upper ejector extrudate Lower ejector Filler Procedure of press forming

7. 4.) Foaming: Bearingseparatingfoil PUR folders Foaming PUR Guide track Mixingheadwith slot jet PUR beltcrosssection Productionofpolyurethanefoambelt

8. Summary: Plastic processing has some characterics of pouring technology but also of metal forming. There are these methods of plastic forming: • Extrusion + blowing • Jetting (into the forms) • Presswork • Foaming

9. Using of extruded pipe as an intermediate material. Flatwise folded hollow foil Draw pulleys Flat boards Idler pulleys Rim cutter Hose inflating to Reel Air cooling Circular nozzle Shaping extension Inflatable air Liquid plastic Foil production by blowing extruded hose

10. ACTIVITY I.: Decide and choose the best solution of the problem: 1.) Product will have very thin and almost evenly strong wall of rounded shape with 2 liter capacity. Will you use foaming? Yes / No / It isn´t easy to determine 2.) Product will have opposite (negative) full shape of counterpart with dimension about 0,2x0,5x0,9 meter and should absorb possible shocks. Will you useblowing? Yes / No / It isn´t easy to determine

11. ACTIVITY II.: Decide and choose the best solution of the problem: 3.) Product will be transparent and will have shape of containment of ceiling light with fluorescent bulb. Will you use presswork? Yes / No / It isn´t easy to determine 4.) Product will have a shape of very thin and long foil (film). Will you use rolling? Yes / No / It isn´t easy to determine

12. VOCABULARY :

13. Resources: * Wikipedie – internetová encyklopedie (cs.wikipedia.org) * Technická Univerzita Liberec (www.ksp.tul.cz) * ENGEL CZ s.r.o. (www.engelglobal.com) * Dillinger, J. a kol. Moderní strojírenství pro školu a praxi. Praha: EUROPA SOBOTÁLES, 2007. ISBN 978-80-86706-19-1. * Mužík, J. Management ve vzdělávání dospělých. Praha: EUROLEX BOHEMIA, 2000. ISBN 80-7361-269-7. * Operační program Vzdělávání pro konkurenceschopnost, ESF 2007 – 2013. * Dostupné na: http://www.msmt.cz/eu/provadeci-dokument-k-op-vzdelavani-pro-konkurenceschopnost