Anglicky v odborn ch p edm tech support of teaching technical subjects in english
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Anglicky v odborných předmětech "Support of teaching technical subjects in English “. Tutorial: Engineering Technology Topic: Plastic VI. – Jetting Prepared by: Ing . Vladislav Zelinka. Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002

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

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Anglicky v odborn ch p edm tech support of teaching technical subjects in english

Anglicky v odborných předmětech"Support ofteachingtechnicalsubjects in English“

Tutorial: Engineering Technology

Topic: Plastic VI. – Jetting

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.


Engineering technology plastic jetting

EngineeringTECHNOLOGYPlasticJetting


Anglicky v odborn ch p edm tech support of teaching technical subjects in english

Brielfy:

Jetting of welded plastic (especially into multipart mould) are used for production of very shaped difficult products.

Process is situated into the only (!) and quite fast productive operation.

Cooled and rigid extrudates usually don´t need any other corrections and they are directly used for assembly.

Process has very stable (permanent) size and shape quality. Whole process is very easily automated.


Anglicky v odborn ch p edm tech support of teaching technical subjects in english

Plasticizing cylinder

Granulate

Jetting cylinder

Jetting – machine (press):

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


Anglicky v odborn ch p edm tech support of teaching technical subjects in english

Mold is closed, plastic is injected.

Plasticizing cylinder

Unit with divided mold

Heated plastic substance

Granulated plastic

Jetting (intomolds):

We use knowledge of forming and pouring during jetting

heating

Jetting hole

mold

Cooling and take out of the product

Filling zone

Plasticizing zone

Measured zone

worm

Heated and plasticizing extruder cylinder

Closing of the mold, cylinder bring up

Space in front of the worm

Working cycle of injection molding machine


Anglicky v odborn ch p edm tech support of teaching technical subjects in english

Summary:

Jetting of welded plastic (especially into multipart mould) are used for production of very shaped difficult products.

Process is situated into the only (!) and quite fast productive operation.

Cooled and rigid extrudates usually don´t need any other corrections and they are directly used for assembly.

Process has very stable (permanent) size and shape quality. Whole process is very easily automated.


Anglicky v odborn ch p edm tech support of teaching technical subjects in english

ACTIVITY I.:

Decide and choose the best solution of the problem:

1.) Jetting process is programmed in its all separate parts (heating, cooling, opening, closing, etc.)

Is it more complicated than at cutting process?

Yes / No / It isn´t easy to determine

2.) Extrudate from injection molding machine gradually and slowly change their colorful shade.

Is it a fault? Yes / No / It isn´t easy to determine


Anglicky v odborn ch p edm tech support of teaching technical subjects in english

ACTIVITY II.:

Decide and choose the best solution of the problem:

3.) In the extrudate there is a part of a component of different color then the rest.

Is it a problem?Yes / No / It isn´t easy to determine

4.) Extrudate isn´t quite finished in one place – the material is missing.

Is it a fault? Yes / No / It isn´t easy to determine


Anglicky v odborn ch p edm tech support of teaching technical subjects in english

VOCABULARY:


Anglicky v odborn ch p edm tech support of teaching technical subjects in english

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


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