Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/ je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky. Tutorial: Engineering Technology Topic: Plastic V. - Extrusion + blowing Prepared by: Ing. Vladislav Zelinka

Engineering TECHNOLOGY Plastic Extrusion + Blowing

Briefly: Extrusion is most often used for production of profiles with hollow inside as well. Process is continuous and plastic profile is then „neverending“. Various flat foils, boards or tapes can be also extruded. Blowing is used for products which have shape of tanks, cans or barrels. Process concurs on pipe extrusion which are blown while warm until they have shape of split form.

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

Profile extrusion: Filling funnel Granulated plastic Steering warm heating Shaping extension Calibrating pipe cooler towbar Cutting machine Hollow profile profile Compaction cylinder Compressed air Line for production of hollow plastic profiles by extrusion

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

Summary: Extrusion is most often used for production of profiles with hollow inside as well. Process is continuous and plastic profile is then „neverending“. Various flat foils, boards or tapes can be also extruded. Blowing is used for products which have shape of tanks, cans or barrels. Process concurs on pipe extrusion which are blown while warm until they have shape of split form.

ACTIVITY I.: Decide and choose the best solution of the problem: 1.) Product will have very thin and almost evenly thick wall of round shape, 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 0,2 x 0,5x0,9 meter and should absorb possible strokes. Will you use blowing? Yes / No / It isn´t easy to determine

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

VOCABULARY: ExtrusionVytlačování BlowingVyfukování Shape fillingVyplnění tvaru ProfileProfil HollowDutý Neverending, endlessNekonečný ContinuousKontinuální TankNádrž CanKanystr BarrelSud pipetrubka

Resources: * Wikipedie – internetová encyklopedie (cs.wikipedia.org) * Technická Univerzita Liberec ( * ENGEL CZ s.r.o. ( * Dillinger, J. a kol. Moderní strojírenství pro školu a praxi. Praha: EUROPA SOBOTÁLES, ISBN * Mužík, J. Management ve vzdělávání dospělých. Praha: EUROLEX BOHEMIA, ISBN * Operační program Vzdělávání pro konkurenceschopnost, ESF 2007 – * Dostupné na: k-op-vzdelavani-pro-konkurenceschopnost